JP2019131245A - Silo inlet device - Google Patents

Abstract

To provide a silo inlet device which can be installed simply with fewer components and without processing the silo, and can suppress air leakage after installation.SOLUTION: A silo inlet device 1 includes: a band 21; a cylindrical body 11 of which on the lower end an annular upper flange 11b is provided which is mounted on the lower flange 21b of the band 21. An inclined surface 11d1 that is inclined so that the flanges 21b and 11b are separated from each other in the vertical direction is formed on the inner peripheral end of the lower surface of the upper flange 11b. The band body 21a of the band 21 is fastened and fixed on the outer peripheral surface of the cylindrical part 3a in such a way that an annular space S is formed which is surrounded by the upper end part of the outer peripheral surface of the cylindrical part 3a, the inner peripheral end part of the upper surface of the lower flange 21b, and the inner peripheral end part of the lower surface of the upper flange 11b. An annular seal member 23 which is pressure-welded with the inner peripheral end part of the lower surface of the upper flange 11b and the upper end part of the outer peripheral surface of the cylindrical part 3a is provided in the annular space S.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a silo slot device.

  For example, in cold districts or the like, silos that store wooden pellets used as a heat source for a heating device are installed outdoors. In general, such a silo includes an input port formed at the upper end portion and an openable / closable outlet formed at the lower end portion. Thus, the pellets are stored in the silo by being introduced from the inlet, and are taken out to the outside by opening the outlet (for example, see Patent Document 1).

  As a method for charging pellets into the silo, there are a drop charging method and an air conveying method. For example, the flexible container bag containing a predetermined amount of pellets is lifted to a position just above the silo inlet by the crane, and the pellets in the flexible container bag are dropped into the silo from the inlet in that state. It is a method to do. In this case, the silo is provided with an inlet for dropping the pellet and a lid for opening and closing the inlet.

  On the other hand, in the air transport method, for example, a blower pipe of an air transport device installed on the ground side and a silo inlet are connected by a transport pipe or the like, and the pellets charged into the air transport device are transported by air transport. This is a method of feeding into a silo from a slot through a pipe or the like. In this case, at the upper end of the silo, there is an input pipe having an input port for supplying air-carrying pellets, a separator that separates the air that has been transferred into the silo together with the pellets, and the separated air is discharged to the outside. Connected to the discharge pipe.

Utility Model Registration No. 315753

  As described above, in the conventional silo, the structure of the vicinity of the inlet at the upper end of the silo differs between the drop-in method and the air conveying method. Therefore, when installing the silo, Only one of them can be used. Therefore, when the drop charging method is adopted when installing the silo, a cylindrical separator having the above charging pipe and discharging pipe is provided in the cylindrical portion where the charging port is formed at the upper end of the silo. It has been studied to be able to change to the air carrying method by retrofitting.

  When changing to the air transfer method as described above, the fastening band is fastened and fixed to the outer peripheral surface of the cylindrical portion of the existing silo, and the flange lower surface on the separator side is placed on the upper surface of the flange on the tightening band side. Then, it is conceivable to connect and fix both flanges. If it does in this way, it will become possible to retrofit a separator, without processing an existing silo.

  However, in this case, the conveyance air for conveying the pellets flows out from the upper end of the cylindrical portion to the outside, between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the tightening band, and on the tightening band side. By leaking outside from between the flange upper surface and the flange lower surface on the separator side, pellets may leak to the outside together with the conveying air. For this reason, when retrofitting a separator, it is necessary to provide a plurality of seal members for preventing the conveyance air from leaking to the outside. As a result, the number of parts increases, and the attaching operation of the separator becomes complicated.

  The present invention has been made in view of such circumstances, and can be easily attached to an existing silo without processing the silo and with a small number of parts, and also suppresses air leakage after attachment. It is an object of the present invention to provide a silo slot device that can be used.

  (1) The present invention is a silo inlet device attached to a cylindrical portion having an upper end opening provided at an upper end portion of a silo, the band main body being fastened and fixed to the outer peripheral surface of the cylindrical portion, and the band A band having an annular lower flange extending laterally outward from the upper end of the main body, a tubular body provided with an annular upper flange placed on the lower flange on the lower end opening side, and provided in the tubular body An inlet pipe for introducing the storage material into the silo by air conveyance; a discharge pipe provided in the cylinder for discharging the conveyance air introduced into the silo together with the storage material; and the lower flange; A fixing means for tightening and fixing the upper flange placed on the lower flange in the vertical direction, and the inner circumference of the upper surface of the lower flange in a state where the upper flange is placed on the lower flange. End Further, at least one of the inner peripheral end portions of the lower surface of the upper flange is formed with an inclined surface that is inclined so that the flanges are separated from each other in the vertical direction from the outer peripheral side toward the inner peripheral side. The band main body is formed with an annular space surrounded by an upper end portion of the outer peripheral surface of the cylindrical portion, an inner peripheral end portion of the upper surface of the lower flange, and an inner peripheral end portion of the lower surface of the upper flange. As described above, at least the inner peripheral end portion of the lower surface of the upper flange in a state in which the lower flange and the upper flange are tightened and fixed by the fixing means. And a silo inlet device further comprising an annular seal member that is in pressure contact with the upper end portion of the outer peripheral surface of the cylindrical portion.

  According to the silo inlet device of the present invention, the band main body of the band is fastened and fixed to the cylinder portion at the upper end of the silo, and the storage pipe is inserted into the silo by air conveyance, and the silo together with the storage The lower flange and the upper flange are fastened and fixed by a fixing means in a state where the upper flange of the cylindrical body having the discharge pipe for discharging the introduced carrier air to the outside is placed on the lower flange of the band. Thus, the silo inlet device can be easily attached to the cylindrical portion at the upper end of the existing silo without processing the silo.

  The sealing member is disposed in an annular space surrounded by the upper end portion of the outer peripheral surface of the cylindrical portion, the inner peripheral end portion of the upper surface of the lower flange, and the inner peripheral end portion of the lower surface of the upper flange. By tightening and fixing the lower flange and the upper flange in the vertical direction, the seal member is pressed against the inner peripheral end portion of the lower surface of the upper flange and the upper end portion of the outer peripheral surface of the cylindrical portion. As a result, the carrier air that has flowed outward from the upper end of the cylindrical portion of the silo is externally exposed between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the band body, and between the upper surface of the lower flange and the lower surface of the upper flange. It is possible to suppress leakage into the single seal member. Therefore, the silo inlet device can be attached with a small number of parts, and air leakage after the silo inlet device is attached can be suppressed.

(2) It is preferable that the inclined surface is formed at an inner peripheral end of the lower surface of the upper flange.
In this case, the conveying air that flows out from the upper end of the cylindrical portion of the silo once hits the inclined surface at the inner peripheral end of the lower surface of the upper flange, and then hits the pressure contact portion of the seal member. Thereby, since the moment when the carrier air and the stored material hit the seal member can be reduced by the inclined surface, the sealing performance can be improved.

  According to the silo inlet device of the present invention, it is possible to easily attach the existing silo without processing the silo with a small number of parts, and to suppress air leakage after the attachment.

1 is a side view showing a silo charging system equipped with a silo charging device and an air transfer device according to an embodiment of the present invention, and shows a state where pellets are being charged into a silo by a drop charging method. It is a side view which shows the said charging system for silos, and has shown the state which has injected | thrown-in the pellet into the silo by the air conveyance method. It is an enlarged side view which shows the insertion port apparatus for silos. It is an enlarged plan view which shows the insertion port apparatus for silos. It is II sectional view taken on the line of FIG. It is a top view which shows the modification of the insertion device for silos. It is II-II arrow sectional drawing of FIG. FIG. 5 is a cross-sectional view taken along the line III-III in FIG. 4. It is a disassembled perspective view which shows the attachment structure with respect to the silo of the insertion device for silos. It is an expanded sectional view which shows the modification of the attachment structure of the insertion device for silos. It is an expanded sectional view which shows the other modification of the attachment structure of the insertion port apparatus for silos. It is an expanded sectional view which shows the reference example of the attachment structure of the insertion device for silos. It is an expanded sectional view which shows the other reference example of the attachment structure of the insertion device for silos. It is a front view which shows an air conveyance apparatus. It is a top view which shows an air conveyance apparatus. It is a right view which shows an air conveyance apparatus. It is a perspective view which shows a box. It is IV-IV arrow sectional drawing of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Silo input system]
1 and 2 are side views showing a silo charging system provided with a silo charging device 1 and an air transfer device 2 according to an embodiment of the present invention. 1 and 2, the silo charging system of the present embodiment charges wooden pellets (stored material) used as a heat source of a heating device (not shown) into a silo 3 installed outdoors in a cold region. Used when storing.

  The silo 3 is formed in a vertically long cylindrical shape, and is supported at a predetermined height position from the ground by a grid-like mount 4 installed on the ground. A cylindrical portion 3 a having an upper end opening is provided at the upper end portion of the silo 3. The upper end opening of the cylindrical portion 3a is an insertion port 3b (see FIG. 5) for dropping the pellets. That is, this silo 3 is installed by adopting a drop-in method as a method for charging pellets.

  The lower part of the silo 3 is formed in a conical cylindrical shape, and an openable / closable outlet 3 c is formed at the lower end of the silo 3. Thereby, the silo 3 can take out the pellet stored in the inside by storing the pellet input into the inside through the input port 3b and opening the outlet 3c.

  A predetermined amount of pellets to be fed into the silo 3 are accommodated in a plurality of flexible container bags 5. The flexible container bag 5 includes a container bag main body 5a in which pellets are accommodated, and a hook portion 5b fixed to the container bag main body 5a. The container bag main body 5a is formed in a substantially rectangular parallelepiped shape, and a discharge port 5c capable of discharging the pellets stored therein is provided on the bottom surface of the container bag main body 5a so as to be openable and closable.

  The plurality of flexible container bags 5 are loaded on the loading platform 6 a of the truck 6 and transported to the installation site of the silo 3. The truck 6 is equipped with a crane 7 having a multistage boom 7a and a hanging hook 7b provided at the tip of the boom 7a. The crane 7 can lift the flexible container back 5 by hooking the hook portion 5b of the flexible container back 5 on the suspension hook 7b. In the present embodiment, an air transfer device 2 described later is also mounted on the loading platform 6a of the truck 6.

[Silo input device]
A silo inlet device 1 is retrofitted to the upper end portion of the cylindrical portion 3 a of the silo 3. The silo inlet device 1 is configured such that pellets can be charged into the silo 3 by any of two types of charging methods, a drop charging method and an air conveying method. That is, the silo inlet device 1 of the present embodiment is either a drop-in method or an air-conveying method with respect to the existing silo 3 installed by adopting the drop-in method as described above. The pellets can be put into the silo 3.

  FIG. 1 shows a state in which the pellets in the flexible container 5 are put into the silo 3 by the drop-in method using the silo inlet device 1. As shown in FIG. 1, the drop-in method using the silo inlet device 1 is such that the flexible container bag 5 is lifted by the crane 7 of the truck 6 directly above the silo inlet device 1 and the flexible container bag 5 is in that state. 5 is a method in which the pellets in 5 are dropped into the silo 3 through the silo inlet device 1 from the discharge port 5c.

  FIG. 2 shows a state in which the pellets in the flexible container bag 5 are put into the silo 3 by the air conveyance method using the silo inlet device 1. As shown in FIG. 2, the air conveyance method using the silo inlet device 1 is configured such that the end of the connection hose 8 connected to the blower pipe 34 (described later) of the air conveyance device 2 mounted on the track 6 is The flexible container bag 5 lifted by the crane 7 of the truck 6 is moved to a position directly above the air conveying device 2 while being connected to the lower end 9a of the charging hose 9 extending downward along the gantry 4 from the silo charging device 1. In this state, the pellets in the flexible container bag 5 are put into the air transfer device 2 from the discharge port 5c, and the air is transferred into the silo 3 through the connection hose 8, the input hose 9, and the silo input device 1. It is a method to throw in.

  The carrier air supplied into the silo 3 together with the pellets is discharged from the lower end portion 10a of the discharge hose 10 extending downward along the gantry 4 from the silo inlet device 1 to the outside. As a result, the silo inlet device 1 also has a function as a separation device for separating the pellet and the carrier air. The charging hose 9 and the discharging hose 10 are retrofitted to the gantry 4 when the silo charging device 1 is retrofitted to the silo 3. Although not shown in FIG. 2, a known cyclone device for further separating the pellet and the carrier air is provided at the lower end portion 10 a of the discharge hose 10, and the silo inlet device 1 is provided by this cyclone device. The pellets that could not be separated in the process are collected.

FIG. 3 is an enlarged side view showing the silo inlet device 1, and FIG. 4 is an enlarged plan view showing the silo inlet device 1. 3 and 4, the silo inlet device 1 includes a cylinder 11, a lid body 12, an inlet pipe 13, an outlet pipe 14, and a support body 15.
The cylinder 11 is formed in a cylindrical shape, and the lower end opening of the cylinder 11 is provided at the upper end of the cylinder 3 a so as to communicate with the silo 3. A first charging port 11 a (see FIG. 5) through which pellets can be dropped into the silo 3 is formed at the upper end of the cylindrical body 11.

  The lid body 12 has a circular lid body 12a that can open and close the first insertion port 11a, and a handle 12b that is fixed to the upper surface of the lid body 12a and extends in the radial direction of the lid body 12. The lid body 12a is formed to have a slightly larger diameter than the cylindrical body 11. One end portion (the right end portion in FIG. 3) of the handle 12 b is supported so as to be rotatable up and down with respect to the bracket 16 fixed to the upper end portion of the outer peripheral surface of the cylindrical body 11.

  Thereby, the handle 12b has a closed position (solid line position in FIG. 3) where the lid body 12a closes the first insertion port 11a, and an open position (two points in FIG. 3) where the lid body 12a opens the first insertion port 11a. It is designed to rotate up and down between the chain line position). Therefore, by rotating the handle 12b together with the lid body 12a to the open position, the pellet can be dropped into the silo 3 from the first insertion port 11a (see also FIG. 1).

  A grip portion 12b1 for an operator to grip the handle 12b is formed at two locations in the middle portion in the longitudinal direction of the handle 12b. An engagement groove 12b2 is formed at the other end of the handle 12b (the left end in FIG. 3).

  A locking device 17 that locks the handle 12b in the closed position is provided at the upper end of the outer peripheral surface of the cylindrical body 11. The locking device 17 includes an engaging member 17a that is supported so as to be rotatable up and down with respect to a bracket 18 that is fixed to the outer peripheral surface of the cylindrical body 11, and a handle 17b that is screwed to the tip of the engaging member 17a. ing. The engagement member 17a has an engagement position (solid line position in FIG. 3) engaged with the engagement groove 12b2 of the handle 12b in the closed position and a release position (FIG. 3) in which the engagement with the engagement groove 12b2 is released. The position can be rotated up and down.

  The lower end surface of the handle 17b comes into contact with the upper surface of the handle 12b by rotating the handle 17b in the tightening direction when the engagement member 17a is in the engagement position. As a result, the engagement member 17a is held in the engagement position, and the handle 12b is locked in the closed position. A seal (not shown) is provided on the lower surface of the lid main body 12a so as to come into pressure contact with the periphery of the first insertion port 11a of the cylindrical body 11 when the handle 17b is rotated in the tightening direction.

  FIG. 5 is a cross-sectional view taken along the line II in FIG. In FIG. 5, illustration of the lid 12 and the lock device 17 is omitted for convenience of explanation. In FIGS. 4 and 5, the input pipe 13 is a pipe for introducing pellets air-transferred from the air transfer device 2 into the silo 3. The input pipe 13 of this embodiment is a straight pipe.

One end (right end in FIG. 5) of the input tube 13 is fixed to the side wall of the cylinder 11 so that the opening 13a on the one end side communicates with the cylinder 11 (in the silo 3). The opening 13a of the input tube 13 is opened sideways. Here, “horizontal opening” means opening in a direction within 45 ° up and down with respect to the horizontal line.
At the other end (left end in FIG. 5) of the input pipe 13, a second input port 13 b is formed through which air-carrying pellets can be input into the silo 3. The upper end of the charging hose 9 is connected to the second charging port 13b of the charging tube 13 (see FIG. 2).

  The input pipe 13 is connected to the side wall of the cylindrical body 11 in an offset state with respect to the center (axis C) of the cylindrical body 11 in a plan view of FIG. 4, and in the axial direction (lateral direction) of the input pipe 13. A part of the extending inner surface is tangentially connected to the inner surface (inner peripheral surface) of the cylindrical body 11. As a result, the pellets that have been conveyed by air are thrown into the silo 3 while rotating spirally along the inner surface of the cylinder 11 from the opening 13 a of the throwing pipe 13. Therefore, the cylinder 11 of the present embodiment also has a function as a cylindrical wall of a cyclone that throws the air-carrying pellets into the silo 3 while spirally rotating along the inner surface of the cylinder 11. .

  4 and 5, the discharge pipe 14 is a pipe for discharging the carrier air introduced into the silo 3 from the input pipe 13 together with the pellets to the outside. The discharge pipe 14 of the present embodiment is formed in an elbow shape as a whole, and includes a horizontal pipe part 14a that is a straight pipe, a bent pipe part 14b that is an elbow pipe, and a vertical pipe part 14c that is a straight pipe. ing.

  One end side of the horizontal tube portion 14a penetrates the side wall of the cylindrical body 11 and is supported by the side wall. The other end of the horizontal tube portion 14 a extends in the horizontal direction toward the center (axis C) in the cylindrical body 11. A discharge port 14a1 is formed at one end of the horizontal tube portion 14a projecting outside the cylindrical body 11 so that the carrier air introduced into the silo 3 together with the pellets can be discharged to the outside. The discharge port 14a1 opens on the same side as the second input port 13b of the input tube 13 (left side in FIG. 4). The upper end of the discharge hose 10 is connected to the discharge port 14a1 (see FIG. 2).

  The bent tube portion 14 b is disposed in the cylindrical body 11. One end of the bent tube portion 14b is connected to the inner end in the horizontal direction of the horizontal tube portion 14a, and the other end of the bent tube portion 14b is connected to the upper end of the vertical tube portion 14c.

The upper end side of the vertical tube portion 14 c is arranged in the cylinder 11, and the lower end side of the vertical tube portion 14 c is arranged below the cylinder portion 3 a in the silo 3. The opening 14c1 on the lower end side of the vertical tube portion 14c opens downward and communicates with the inside of the silo 3. Here, “opening downward” means opening in a direction within ± 45 ° with respect to the vertical downward direction.
Thereby, the opening 13a (opening of one pipe) of the input pipe 13 is arranged above the opening 14c1 (opening of the other pipe) of the discharge pipe 14. Here, when the opening of one tube is “disposed above” the opening of the other tube, the lowermost edge of the opening of one tube is higher than the uppermost edge of the opening of the other tube. It means that it is arranged on the upper side.

  The discharge pipe 14 is arranged in a state where the axis X of the vertical pipe portion 14 c is offset with respect to the axis C of the cylindrical body 11. As a result, compared to the case where the axis X coincides with the axis C, the pellet dropped from the first inlet 11a is less likely to hit the discharge pipe 14, and thus the discharge pipe 14 is prevented from being damaged. be able to.

  The support 15 is made of a horizontally long flat plate member and is disposed in the cylinder 11. One end in the longitudinal direction of the support 15 is welded to the inner surface of the cylinder 11, and the other end in the longitudinal direction of the support 15 is welded to the outer peripheral surface of the bent tube portion 14b. Thereby, one end of the horizontal tube portion 14 a in the discharge pipe 14 is supported by the side wall of the cylinder 11, and the other end side (bent tube portion 14 b) of the horizontal tube portion 14 a in the discharge pipe 14 is supported by the support body 15. It is supported on the side wall of. In other words, one end side and the other end side of the horizontal tube portion 14 a in the discharge pipe 14 are supported in a cantilevered manner with respect to the side wall of the cylindrical body 11.

  As described above, according to the silo charging device 1 of the present embodiment, the first charging port 11a of the cylindrical body 11 is opened by the lid body 12, whereby the pellets in the flexible container bag 5 lifted by the crane 7 can be used. 1 can be dropped into the silo 3 from the inlet 11a (see FIG. 1). In addition, with the lid 12 closing the first input port 11a of the cylinder 11, the connection hose 8 and the input hose connect the second input port 13b of the input tube 13 and the blower 31 of the ground-side air transfer device 2. 9, the pellets put into the air carrier 2 from the flexible container bag 5 can be put into the silo 3 from the second inlet 13b by air carrier, and the carrier air in the silo 3 can be supplied. It can discharge | emit outside from the discharge port 14a1 of the discharge pipe 14 (refer FIG. 2).

  As a result, the pellets can be charged into the silo 3 by either the drop-in method or the air conveying method. Also, these two types of charging methods can be used properly depending on the type of pellet. For example, when the pellet is relatively soft and easily crushed, a drop-in method can be used, and when the pellet is relatively hard, an air conveyance method can be used.

  In addition, since the input pipe 13 and the discharge pipe 14 are provided on the cylindrical body 11, the lid body 12 is lighter than when the input pipe 13 and the discharge pipe 14 are provided on the cover body 12. Thereby, the 1st insertion port 11a can be easily opened and closed by the lid body 12.

  In addition, since the opening 13a of the input pipe 13 opens sideways and the opening 14c1 of the discharge pipe 14 opens downward, the opening 13a of the input pipe 13 and the opening 14c1 of the discharge pipe 14 are different from each other. Open in the direction. Thereby, it can suppress that the pellet thrown in in the silo 3 from the opening part 13a of the injection pipe 13 by air conveyance is discharged | emitted outside from the opening part 14c1 of the discharge pipe 14 with conveyance air.

  Further, since the opening 13a of the input pipe 13 is disposed above the opening 14c1 of the discharge pipe 14, the opening 13a of the input pipe 13 and the opening 14c1 of the discharge pipe 14 are different from each other in the vertical direction. Open at position. Thereby, it can further suppress that the pellet thrown in into the silo 3 from the opening part 13a of the injection pipe 13 by air conveyance is discharged | emitted outside from the opening part 14c1 of the discharge pipe 14 with conveyance air.

  Further, one end of the horizontal pipe portion 14 a in the discharge pipe 14 is supported by the side wall of the cylinder 11, and the other end side (bent pipe section 14 b) of the horizontal pipe section 14 a in the discharge pipe 14 is supported by the support body 15. It is supported on the side wall of. Thereby, since the one end side and the other end side of the horizontal pipe part 14a in the discharge pipe 14 are supported by both sides with respect to the side wall of the cylindrical body 11, it falls into the cylindrical body 11 from the 1st insertion port 11a. Even when the charged pellet hits the discharge pipe 14, the load acting on the support portion of the discharge pipe 14 on the side wall of the cylinder 11 can be reduced.

  In addition to the function as a vertical wall that guides the pellets into the silo 3 when dropping the pellets from the first insertion port 11a, the cylindrical body 11 has the pellets of the cylindrical body 11 when the pellets are conveyed by air. Since it also has a function as a cylindrical wall of a cyclone that is inserted into the silo 3 while rotating spirally along the inner side surface, the number of parts of the silo inlet device 1 is reduced, and it can be manufactured at low cost. it can.

[Modified example of silo slot device]
FIG. 6 is a plan view showing a modification of the silo inlet device 1, and FIG. 7 is a cross-sectional view taken along the line II-II in FIG. 6 and 7, the lid 12 and the lock device 17 are not shown for convenience of explanation. 6 and 7, the charging pipe 13 of the present modification has a cylindrical portion formed on the outer side of the cylindrical body 11, and a rectangular portion disposed on the inner side through the cylindrical body 11. It is formed in a cylindrical shape.

  The discharge pipe 14 of the present modified example has a discharge port 14a1 that opens on the opposite side (right side in FIG. 6) of the input tube 13 to the second input port 13b. Further, the vertical tube portion 14 c is formed shorter in the axial direction than the vertical tube portion 14 c shown in FIG. 5, and the entire vertical tube portion 14 c is disposed in the cylindrical body 11.

  The silo inlet device 1 according to the present modification includes a celestial cylindrical separation cylinder 19 disposed in the cylinder 11. The separation cylinder 19 is formed to have a larger diameter than the vertical pipe portion 14 c of the discharge pipe 14, and is arranged coaxially with the axis C of the cylinder 11. Further, the separation cylinder 19 of the present embodiment is disposed across the cylinder 11 and the cylinder portion 3a of the silo 3, and an opening 19a on the lower end side of the separation cylinder 19 communicates with the inside of the cylinder portion 3a. Yes.

  The upper end of the side wall 19b of the separation cylinder 19 is connected in a state where the end portion on the inner side in the horizontal direction of the input tube 13 is offset with respect to the center (axis C) of the separation cylinder 19, In a state where a part of the inner surface extending in the axial direction (lateral direction) of the input tube 13 is tangentially connected to the inner surface (inner peripheral surface) of the separation tube 19, the opening of the input tube 13 in the separation tube 19 is provided. The part 13a communicates.

  As a result, the air-carrying pellets are thrown into the silo 3 while rotating spirally along the inner side surface of the side wall 19b of the separation cylinder 19 from the opening 13a of the charging pipe 13. Therefore, in this modification, the separation cylinder 19 provided separately from the cylinder 11 feeds the pellets, which are conveyed by air, into the silo 3 while spirally rotating along the inner surface of the separation cylinder 19. It functions as a cylindrical wall.

  The top wall 19 c of the separation cylinder 19 is connected to the lower end of the vertical pipe portion 14 c of the discharge pipe 14, and the opening 14 c 1 of the discharge pipe 14 communicates with the separation cylinder 19. As a result, the carrier air introduced into the separation cylinder 19 from the opening 13 a of the input pipe 13 together with the pellets can be discharged to the outside from the opening 14 c 1 of the discharge pipe 14.

  With the above configuration, in the present modification, one end side of the horizontal pipe portion 14a in the discharge pipe 14 is supported by the side wall of the cylindrical body 11, and the other end side (vertical pipe portion 14c) of the horizontal pipe portion 14a in the discharge pipe 14 is It is supported on the side wall of the cylindrical body 11 via the separation cylinder 19 and the charging pipe 13. As a result, one end side and the other end side of the horizontal pipe portion 14a in the discharge pipe 14 are supported in a doubly supported manner with respect to the side wall of the cylindrical body 11, so Even when the pellets hit the discharge pipe 14, the load acting on the support portion of the discharge pipe 14 on the side wall of the cylinder 11 can be reduced. Further, the other end side of the horizontal tube portion 14 a in the discharge pipe 14 is supported on the side wall of the cylinder body 11 via the separation cylinder 19 and the input pipe 13, so that the side tube section 14 a A dedicated support 15 (see FIG. 5) for supporting the other end side is not necessary.

[Mounting structure of silo inlet device]
8 is a cross-sectional view taken along arrow III-III in FIG. FIG. 9 is an exploded perspective view showing a mounting structure of the silo input device 1 to the cylindrical portion 3a of the silo 3. As shown in FIG. 8 and 9, illustration of the lid 12 and the lock device 17 is omitted for convenience of explanation.
In FIG. 8 and FIG. 9, the silo inlet device 1 further includes a band 21, a fixing means 22, and a seal member 23.

  The band 21 has a band main body 21a that is fastened and fixed to the outer peripheral surface of the cylindrical portion 3a, and a lower flange 21b that extends radially outward from the upper end of the band main body 21a. The band main body 21a is composed of an end-like annular band plate, and the inner diameter of the band main body 21a is set slightly larger than the outer diameter of the cylindrical portion 3a. A pair of to-be-tightened portions 21a1 projecting radially outward are integrally formed at both ends in the circumferential direction of the band main body 21a. Each tightened portion 21a1 has a through hole 21a2 through which a bolt (not shown) is inserted. Each through-hole 21a2 is a long hole extending in the protruding direction of the tightened portion 21a1.

  As described above, with the band main body 21a disposed on the outer peripheral surface of the cylindrical portion 3a, a nut (not shown) is screwed and tightened to a bolt inserted into the through hole 21a2 of the pair of tightened portions 21a1. The band main body 21a is fastened and fixed to the outer peripheral surface of the cylindrical portion 3a. At that time, the band main body 21a is fastened and fixed at a position below the upper end of the outer peripheral surface of the cylindrical portion 3a by a predetermined dimension so that an annular space S described later is formed.

  On the outer peripheral surface of the band main body 21a, a plurality (four in FIG. 9) of bases 21c projecting radially outward are provided at predetermined intervals in the circumferential direction. Each pedestal 21c is made of a channel material that opens downward, and a through hole 21c1 is formed in an upper plate portion thereof. The through hole 21c1 is a long hole extending in the width direction of the base 21c.

  A lower flange 21b made of an annular flat plate member is placed on the upper surface of the base 21c. The inner diameter of the lower flange 21b is set slightly larger than the outer diameter of the cylindrical portion 3a. A plurality (four in FIG. 9) of through holes 21b1 are formed in the lower flange 21b at predetermined intervals in the circumferential direction. Each through hole 21b1 is a long hole extending in the radial direction of the lower flange 21b. The lower flange 21b is placed on the pedestal 21c so that each through hole 21b1 and each through hole 21c1 of the pedestal 21c coincide.

  An annular upper flange 11 b is provided on the lower end opening side of the cylindrical body 11. The upper flange 11b includes an annular flat portion 11c fixed to the lower end of the cylindrical body 11, an annular inclined portion 11d fixed to the outer peripheral end of the flat portion 11c, and a plurality of protrusions provided on the inclined portion 11d (FIG. 9). 4) of mounting portions 11e.

  The inner diameter of the flat portion 11 c is set slightly smaller than the inner diameter of the cylindrical body 11, and is welded in a state where the upper surface of the inner peripheral end of the flat portion 11 c is in contact with the lower end surface of the cylindrical body 11. The outer diameter of the flat part 11c is set larger than the outer diameter of the cylinder part 3a.

  The attachment portion 11e is made of a channel material that opens upward, and one end portion in the longitudinal direction (the left end portion in FIG. 8) is inclined so that the lower plate portion 11e1 extends radially outward from the outer peripheral end of the inclined portion 11d. It is welded to the upper surface side of the portion 11d (see also FIG. 4). A through hole 11e2 is formed in the lower plate portion 11e1 of the attachment portion 11e. The through hole 11e2 is a long hole extending in the protruding direction of the mounting portion 11e. The lower plate portion 11e1 is fastened and fixed by the fixing means 22 in a state where the lower plate portion 11e1 is placed on the upper surface of the lower flange 21b so that the through holes 11e2 and the through holes 21b1 of the lower flange 21b coincide with each other.

  The fixing means 22 includes a plurality of bolts 22a and nuts 22b. The bolt 22a is inserted through the through holes 11e2, 21b1, and 21c1 of the lower plate portion 11e1, the lower flange 21b, and the base 21c that are overlapped with each other. In this state, the lower plate portion 11e1, the lower flange 21b, and the base 21c are integrally connected by screwing the nut 22b to the bolt 22a and tightening the nut 22b in the vertical direction. Thereby, the lower flange 21b of the band 21 fixed to the outer peripheral surface of the cylindrical portion 3a of the silo 3 and the upper flange 11b of the cylindrical body 11 are fastened and fixed, and the silo inlet device 1 is attached to the cylindrical portion 3a of the silo 3. Will be attached.

  In the state where the lower plate portion 11e1 of the upper flange 11b is placed on the lower flange 21b, the lower surface of the inclined portion 11d (the inner peripheral end portion of the lower surface of the upper flange 11b) moves from the outer peripheral end toward the inner peripheral end. The lower flange 21b and the upper flange 11b are inclined surfaces 11d1 that are inclined so as to be separated from each other in the vertical direction. As a result, the upper end 3a1 of the outer peripheral surface of the cylindrical portion 3a, the inner peripheral end 21b2 of the upper surface of the lower flange 21b, and the inner peripheral end of the lower surface of the upper flange 11b (the outer peripheral end 11c1 of the lower surface of the flat portion 11c and An annular space S surrounded by these surfaces is formed between the inclined surface 11d and the inclined surface 11d1). An annular seal member 23 is arranged in the annular space S.

  The seal member 23 is made of, for example, an O-ring made of synthetic rubber and has a circular cross section. The seal member 23 suppresses leakage of the carrier air in the silo 3 to the outside of the silo inlet device 1 when the pellets are thrown into the silo 3 by the air carrier method. In addition, since the seal | sticker which press-contacts to the periphery of the 1st insertion port 11a of the cylinder 11 as mentioned above is provided in the lower surface of the lid body 12a, it is from between the upper end of the cylinder 11 and the lid body 12a. The carrier air in the silo 3 does not leak outside.

  The seal member 23 is disposed in the annular space S with a predetermined tightening allowance. That is, in the free state, the cross-sectional diameter of the seal member 23 is the inclined surface 11d1 of the upper flange 11b, the upper end 3a1 of the outer peripheral surface of the cylindrical portion 3a, and the inner peripheral end 21b2 of the upper surface of the lower flange 21b. Is set to be larger than the diameter of a virtual inscribed circle that is in contact with each other. Thereby, the outer peripheral surface of the seal member 23 is in a state where the lower flange 21b and the upper flange 11b are fastened and fixed by the fixing means 22, the inclined surface 11d1 of the upper flange 11b, the upper end portion 3a1 of the outer peripheral surface of the cylindrical portion 3a, and the lower The flange 21b is in pressure contact with the inner peripheral end 21b2 on the upper surface (see FIG. 8). In the present embodiment, for convenience of explanation, the cross-sectional diameter of the seal member 23 and the diameter of the virtual inscribed circle are made to coincide.

As described above, the outer peripheral surface of the seal member 23 is in pressure contact with the upper end portion 3a1 of the outer peripheral surface of the cylindrical portion 3a, whereby the upper end of the cylindrical portion 3a and the lower end of the upper flange 11b on the cylindrical body 11 side (the lower surface of the flat portion 11c). ) Between the outer peripheral surface of the cylindrical portion 3a and the inner peripheral surface of the band main body 21a can be prevented from leaking to the outside.
Further, since the outer peripheral surface of the seal member 23 is in pressure contact with the inclined surface 11d1 of the upper flange 11b, the transported air that has flowed out of the cylindrical portion 3a as described above flows between the upper surface of the lower flange 21b and the lower surface of the upper flange 11b ( In particular, it is possible to suppress leakage from the space between the outer periphery of the inclined portion 11d).

  According to the silo inlet device 1 of the present embodiment configured as described above, the band body 21a of the band 21 is fastened and fixed to the cylindrical portion 3a of the upper end portion of the silo 3, and the pellets are transferred into the silo 3 by air conveyance. The upper flange 11b of the cylindrical body 11 provided with the input pipe 13 to be supplied to the pipe and the discharge pipe 14 for discharging the carrier air supplied into the silo 3 together with the pellets to the outside was placed on the lower flange 21b of the band 21. In this state, the lower flange 21 b and the upper flange 11 b are fastened and fixed by the fixing means 22.

  Thereby, the silo inlet device 1 can be easily attached to the cylindrical portion 3a at the upper end portion of the existing silo 3 without processing the silo 3. In particular, after the silo 3 is installed, this is effective when the silo inlet device 1 is retrofitted to the silo 3 in order to change the pellet charging method from the drop charging method to the air conveying method.

  An annular space S surrounded by the upper end 3a1 of the outer peripheral surface of the cylindrical portion 3a, the inner peripheral end 21b2 of the upper surface of the lower flange 21b, and the inner peripheral end (inclined surface 11d1, etc.) of the lower surface of the upper flange 11b. In the state where the seal member 23 is disposed, the lower flange 21b and the upper flange 11b are fastened and fixed in the vertical direction by the fixing means 22, so that the seal member 23 has the inclined surface 11d1 of the upper flange 11b and the outer peripheral surface of the cylindrical portion 3a. Is pressed against the upper end 3a1.

  Thereby, the conveyance air which flowed out of the cylinder part 3a from between the upper end of the cylinder part 3a of the silo 3 and the lower end of the upper flange 11b on the cylinder body 11 side (the lower surface of the flat part 11c) becomes the cylinder part 3a. A single seal member 23 leaks to the outside between the outer peripheral surface of the band main body 21a and the inner peripheral surface of the band main body 21a and between the upper surface of the lower flange 21b and the lower surface of the upper flange 11b (lower plate portion 11e1). Can be suppressed. Therefore, the silo inlet device 1 can be attached with a small number of parts, and air leakage after the silo inlet device 1 is attached can be suppressed.

  Further, since the inclined surface 11d1 is formed at the inner peripheral end of the lower surface of the upper flange 11b, the transported air that has flowed out of the cylindrical portion 3a as described above temporarily reaches the inclined surface 11d1 on the lower surface of the upper flange 11b. After hitting, it hits the pressure contact portion of the seal member 23. Thereby, the moment when the carrier air hits the seal member 23 can be relaxed by the inclined surface 11d1, so that the sealing performance can be enhanced.

[Modification of mounting structure of silo inlet device]
FIG. 10 is an enlarged cross-sectional view showing a modification of the mounting structure of the silo inlet device 1 of the present embodiment. In this modification, the upper flange 11 b of the cylinder 11 is configured only by an annular flat portion 11 c fixed to the lower end of the cylinder 11. A through hole 11c2 through which the bolt 22a is inserted is formed in the flat portion 11c.

  The upper plate portion of the pedestal 21c includes a base portion 21c2 extending obliquely upward from the upper end of the band main body 21a toward the radially outer side, and a tip portion 21c3 extending horizontally further radially outward from the tip of the base portion 21c2. Have. A through hole 21c1 through which the bolt 22a is inserted is formed in the tip portion 21c3.

  The lower flange 21b is an annular inclined portion 21b3 that is inclined along the base portion 21c2 of the pedestal 21c and an annular flat portion that is formed flat along the tip portion 21c3 of the pedestal 21c while being placed on the pedestal 21c. 21b4. A through hole 21b1 through which the bolt 22a is inserted is formed in the flat portion 21b4. The upper surface of the inclined portion 21b3 is an inclined surface 21b5 that is inclined so that the lower flange 21b and the upper flange 11b are separated from each other in the vertical direction from the outer peripheral end toward the inner peripheral end.

  Thereby, the upper end 3a1 of the outer peripheral surface of the cylindrical portion 3a, the inner peripheral end (inclined surface 21b5) of the upper surface of the lower flange 21b, and the inner peripheral end 11c3 of the lower surface of the upper flange 11b (flat portion 11c). An annular space S surrounded by these surfaces is formed between them. The outer peripheral surface of the seal member 23 arranged in the annular space S is in a state where the lower flange 21b and the upper flange 11b are fastened and fixed by the fixing means 22, and the inner peripheral end portion 11c3 and the cylindrical portion 3a on the lower surface of the upper flange 11b. The outer peripheral surface is in pressure contact with the upper end 3a1 and the inclined surface 21b5 of the lower flange 21b.

As a result, the outer peripheral surface of the seal member 23 comes into pressure contact with the upper end portion 3a1 of the outer peripheral surface of the cylindrical portion 3a, so that the carrier air that has flowed outward from the upper end of the cylindrical portion 3a is separated from the outer peripheral surface of the cylindrical portion 3a and the band body 21a It is possible to suppress leakage to the outside from between the inner peripheral surface of the.
Further, since the outer peripheral surface of the seal member 23 is in pressure contact with the inner peripheral end portion 11c3 of the lower surface of the upper flange 11b, the carrier air that flows out from the upper end of the cylindrical portion 3a is the upper surface of the lower flange 21b (flat portion 21b4). And leakage from between the lower surface of the upper flange 11b can be suppressed.

  FIG. 11 is an enlarged cross-sectional view showing another modified example of the mounting structure of the silo inlet device 1 of the present embodiment. This modification is a combination of the upper flange 11b of FIG. 8, the lower flange 21b and the base 21c of FIG. That is, the upper flange 11b of this modification is the same as the upper flange 11b of FIG. 8, and the lower flange 21b and the base 21c of this modification are the same as the lower flange 21b and the base 21c of FIG.

  The lower plate portion 11e1 of the upper flange 11b is placed on the upper surface of the flat portion 21b4 of the lower flange 21b. Accordingly, the upper end 3a1 of the outer peripheral surface of the cylindrical portion 3a, the inner peripheral end portion (inclined surface 21b5) of the upper surface of the lower flange 21b, and the inner peripheral end portion of the lower surface of the upper flange 11b (the outer periphery of the lower surface of the flat portion 11c) An annular space S surrounded by these surfaces is formed between the end portion 11c1 and the inclined surface 11d1) of the inclined portion 11d. The outer peripheral surface of the seal member 23 disposed in the annular space S is the upper end of the inclined surface 11d1 of the upper flange 11b and the outer peripheral surface of the cylindrical portion 3a in a state where the lower flange 21b and the upper flange 11b are fastened and fixed by the fixing means 22. The part 3a1 and the inclined surface 21b5 of the lower flange 21b are pressed against each other.

As a result, the outer peripheral surface of the seal member 23 comes into pressure contact with the upper end portion 3a1 of the outer peripheral surface of the cylindrical portion 3a, so that the carrier air that has flowed outward from the upper end of the cylindrical portion 3a is separated from the outer peripheral surface of the cylindrical portion 3a and the band body 21a It is possible to suppress leakage to the outside from between the inner peripheral surface of the.
Further, since the outer peripheral surface of the seal member 23 is in pressure contact with the inclined surface 11d1 of the upper flange 11b, the conveyance air that has flowed outward from the upper end of the cylindrical portion 3a is in contact with the upper surface of the lower flange 21b (flat portion 21b4) and the upper flange 11b. Leakage from the space between the lower surface (particularly the outer peripheral end of the inclined portion 11d) can be suppressed.

[Reference example of installation structure of silo inlet device]
FIG. 12 is an enlarged cross-sectional view showing a reference example of the mounting structure of the silo inlet device. In this reference example, the band 21, the fixing means 22, and the seal member 23 are provided on the inner peripheral side of the cylindrical portion 3a. The band 21 is fixed by expanding the diameter of the band main body 21a and pressing the outer peripheral surface of the band main body 21a against the inner peripheral surface of the cylindrical portion 3a. The outer peripheral end of the lower flange 21b is directly fixed to the upper end of the band main body 21a, and the inner peripheral end of the lower flange 21b extends inward in the radial direction of the cylindrical portion 3a. A through hole 21b1 through which the bolt 22a is inserted is formed at the inner peripheral end of the lower flange 21b.

  An annular upper flange 11 b extending radially inward is provided on the lower end opening side of the cylindrical body 11. The upper flange 11b is fixed to the annular flat portion 11c fixed to the lower end of the cylindrical body 11, the annular inclined portion 11d fixed to the inner peripheral end of the flat portion 11c, and the inner peripheral end of the inclined portion 11d. And an annular mounting portion 11e. The attachment portion 11e is placed on the upper surface of the lower flange 21b, and a through hole 11e2 through which the bolt 22a is inserted is formed in the attachment portion 11e.

  The bolt 22a of the fixing means 22 is inserted through the through holes 11e2 and 21b1 of the mounting portion 11e and the lower flange 21b, which are overlapped with each other. In this state, the mounting portion 11e and the lower flange 21b are integrally connected by screwing the nut 22b to the bolt 22a and tightening the nut 22b in the vertical direction. Thereby, the lower flange 21b of the band 21 fixed to the inner peripheral surface of the cylindrical portion 3a of the silo 3 and the upper flange 11b of the cylindrical body 11 are fastened and fixed, and the silo inlet device is attached to the cylindrical portion 3a of the silo 3. 1 is attached.

  With the mounting portion 11e of the upper flange 11b being placed on the lower flange 21b, the lower surface of the inclined portion 11d is such that the lower flange 21b and the upper flange 11b move in the vertical direction from the inner peripheral end toward the outer peripheral end. The inclined surface 11d1 is inclined so as to be separated. Thereby, the upper end 3a2 of the inner peripheral surface of the cylindrical portion 3a, the outer peripheral end 21b6 of the upper surface of the lower flange 21b, and the inner peripheral end of the lower surface of the upper flange 11b (the inner peripheral end 11c3 of the lower surface of the flat portion 11c). Between the inclined surface 11d1) of the inclined portion 11d, an annular space S surrounded by these surfaces is formed.

  An annular seal member 23 is disposed in the annular space S. The outer peripheral surface of the seal member 23 is in a state where the lower flange 21b and the upper flange 11b are fastened and fixed by the fixing means 22, the inclined surface 11d1 of the upper flange 11b, the upper end portion 3a2 of the inner peripheral surface of the cylindrical portion 3a, and the lower flange 21b. Are respectively press-contacted to the outer peripheral end portion 21b6 of the upper surface.

  Thereby, the outer peripheral surface of the seal member 23 is brought into pressure contact with the inclined surface 11d1 of the upper flange 11b, so that the conveyance that has flowed out into the annular space S from between the lower surface of the upper flange 11b (mounting portion 11e) and the upper surface of the lower flange 21b. Air is prevented from leaking to the outside between the upper end of the cylindrical portion 3a and the lower end of the upper flange 11b (the lower surface of the flat portion 11c) by moving radially outward along the inclined surface 11d1 of the upper flange 11b. Can do.

  Further, the outer peripheral surface of the seal member 23 is in pressure contact with the outer peripheral end portion 21b6 on the upper surface of the lower flange 21b and the upper end portion 3a2 of the inner peripheral surface of the cylindrical portion 3a, so that the carrier air that has flowed out into the annular space S as described above. Then, it moves upward along the upper end portion 3a2 of the inner peripheral surface of the cylindrical portion 3a via the outer peripheral end portion 21b6 on the upper surface of the lower flange 21b, and the upper end of the cylindrical portion 3a and the lower end of the upper flange 11b (of the flat portion 11c). Leakage to the outside from between the lower surface) can be suppressed.

  FIG. 13: is an expanded sectional view which shows the other reference example of the attachment structure of the insertion device for silos. This reference example is a modification of FIG. 12, and the upper flange 11 b of the cylinder 11 is constituted only by an annular flat portion 11 c fixed to the lower end of the cylinder 11. A through hole 11c2 through which the bolt 22a is inserted is formed at the inner peripheral end of the flat portion 11c.

  The lower flange 21b has an annular inclined portion 21b3 formed on the outer peripheral side, and an annular flat portion 21b4 extending radially inward from the inner peripheral end of the inclined portion 21b3. A through hole 21b1 through which the bolt 22a is inserted is formed in the flat portion 21b4. The upper surface of the inclined portion 21b3 is an inclined surface 21b5 that is inclined so that the lower flange 21b and the upper flange 11b are separated from each other in the vertical direction from the inner peripheral end to the outer peripheral end.

  Thereby, the upper end 3a2 of the inner peripheral surface of the cylindrical portion 3a, the inner peripheral end (inclined surface 21b5) of the upper surface of the lower flange 21b, and the outer peripheral end 11c1 of the lower surface of the upper flange 11b (flat portion 11c). An annular space S surrounded by these surfaces is formed between them. The outer peripheral surface of the seal member 23 disposed in the annular space S is in a state where the lower flange 21b and the upper flange 11b are fastened and fixed by the fixing means 22, and the outer peripheral end portion 11c1 and the cylindrical portion 3a on the lower surface of the upper flange 11b. The upper end 3a2 of the peripheral surface and the inclined surface 21b5 of the lower flange 21b are pressed against each other.

  Thereby, the outer peripheral surface of the seal member 23 is pressed against the outer peripheral end portion 11c1 of the lower surface of the upper flange 11b, so that the annular space S is formed between the lower surface of the upper flange 11b and the upper surface of the lower flange 21b (flat portion 21b4). The outflowing carrier air moves radially outward along the outer peripheral end 11c1 of the lower surface of the upper flange 11b, and leaks to the outside from between the cylindrical portion 3a and the lower end of the upper flange 11b (the lower surface of the flat portion 11c). Can be suppressed.

  Further, since the outer peripheral surface of the seal member 23 is in pressure contact with the inclined surface 21b5 of the lower flange 21b and the upper end portion 3a2 of the inner peripheral surface of the cylindrical portion 3a, the carrier air that has flowed out into the annular space S as described above is It moves upward along the upper end portion 3a2 of the inner peripheral surface of the cylindrical portion 3a via the inclined surface 21b5 of 21b, and between the upper end of the cylindrical portion 3a and the lower end of the upper flange 11b (the lower surface of the flat portion 11c). Leakage to the outside can be suppressed.

[Air transfer device]
FIG. 14 is a front view showing the air conveyance device 2, and FIG. 15 is a plan view showing the air conveyance device 2. 14 and 15, the air transfer device 2 of the present embodiment includes a blower (air supply source) 31, a motor 32, a control panel 33, a blower pipe 34, a hopper 35, and a valve in an internal space 30 g of the housing 30. 36 is accommodated. In the present embodiment, the lower side of FIG. 15 is referred to as “front side”, and the upper side of FIG. 15 is referred to as “rear side”. Further, the right side of FIG. 15 is referred to as “right side”, and the left side of FIG. 15 is referred to as “left side”. Further, the upper side of FIG. 14 is referred to as “upper side”, and the lower side of FIG. 14 is referred to as “lower side”.

  The housing 30 is formed in a hollow rectangular parallelepiped shape, and includes a front wall 30a, a rear wall 30b, an upper wall 30c, a lower wall 30d, a right wall 30e, and a left wall 30f. The inner space 30g of the housing 30 is sealed by these walls 30a to 30f. The front wall 30a is rotatably provided with an opening / closing door 30h that opens and closes an opening 30a1 (see FIG. 2) formed on the right side thereof. Eyebolts 30i are fixed to the four corners of the upper wall 30c.

  The blower 31 applies pressure to the sucked air and sends it out, and has a suction port 31a for sucking air and a sending port 31b for sending air. The blower 31 of the present embodiment is disposed in the substantially central portion of the internal space 30g. The suction port 31a opens upward, and the delivery port 31b opens rightward.

The motor 32 is a drive source that drives the blower 31, and is disposed on the left side of the internal space 30g.
The control panel 33 drives and controls the motor 32 and the valve 36, and is disposed on the rear side of the motor 32 on the left side of the internal space 30g. In FIG. 14, the control panel 33 is not shown.

  FIG. 16 is a right side view showing the air conveyance device 2. 14 to 16, the blower pipe 34 blows the air sent from the blower 31 to the outside of the housing 30. The blower pipe 34 of the present embodiment has a first pipe part 34a that has an upper end connected to the outlet 31b of the blower 31 and extends downward, and a second pipe part 34b that extends rearward from the lower end part of the first pipe part 34a. The third tube portion 34c extends rightward from the rear end portion of the second tube portion 34b, and the fourth tube portion 34d extends frontward from the right end portion of the third tube portion 34c.

  The front end portion of the fourth tube portion 34d extends to the front of the front wall 30a, and the front end opening of the fourth tube portion 34d is a connection port 34e that opens toward the opening portion 30a1 of the front wall 30a. Therefore, by opening the opening / closing door 30h, the end of the connection hose 8 can be connected to the connection port 34e of the fourth pipe portion 34d (see also FIG. 2).

  The hopper 35 is used for putting pellets (conveyed materials) in the flexible container bag 5 into the blower pipe 34, and is fixed to the housing 30 in a state of being disposed on the upper right side of the internal space 30g. A charging port 35 a formed at the upper end of the hopper 35 is opened in the upper wall 30 c of the housing 30. A discharge port 35 b formed at the lower end of the hopper 35 is connected to the valve 36.

  The valve 36 adjusts the amount of the pellets put into the hopper 35 to be sent out into the blower pipe 34. The valve 36 of the present embodiment is a rotary valve, and is disposed between the fourth pipe portion 34d of the blower pipe 34 and the hopper 35 on the right side of the internal space 30g. An inlet 36 a formed at the upper end of the valve 36 is connected to an outlet 35 b of the hopper 35. An outlet 36b formed at the lower end of the valve 36 is connected to the central portion in the longitudinal direction of the fourth pipe portion 34d and communicates with the inside of the fourth pipe portion 34d.

  With the above configuration, as shown in FIG. 2, the flexible container lifted by the crane 7 of the truck 6 with the opening / closing door 30 h of the housing 30 opened and the connection hose 8 connected to the connection port 34 e of the blower pipe 34. The pellets in the flexible container bag 5 can be put into the hopper 35 by moving the bag 5 to the position just above the charging port 35 a of the hopper 35. Then, while the blower 31 is driven by the motor 32 and the valve 36 is controlled, the pellets put into the hopper 35 are sent out into the blower pipe 34 through the valve 36 and are connected to the connection hose 8 together with the carrier air. The silo 3 is charged through the charging hose 9 and the silo charging device 1.

  14 and 16, the housing 30 further includes a box 37 having a hollow rectangular cross section that is fixed at two positions spaced apart from each other in the left-right direction on the upper surface of the lower wall 30d. Each box 37 is formed over the entire length of the housing 30 in the front-rear direction. Each box 37 is formed with an intake passage 40 through which air sucked by the blower 31 is taken into the internal space 30g of the housing 30 from the outside.

  17 is a perspective view showing the box 37, and FIG. 18 is a cross-sectional view taken along arrows IV-IV in FIG. In FIG. 17 and FIG. 18, the intake passage 40 of the box 37 is constituted by an outer passage 41 that is a hollow portion in the box 37 and inner passages 42 formed on the left and right side walls 37 a and 37 b of the box 37. ing.

  Both ends in the longitudinal direction of the outer passage 41 are opened in the front wall 30a and the rear wall 30b of the housing 30, respectively, and each of these openings is an outer air inlet 41a that opens to the outside of the housing 30 ( (See also FIG. 16). Accordingly, the outer path 41 is formed so as to directly communicate with the outside of the housing 30 and not directly communicate with the internal space 30 g of the housing 30.

  A plurality (seven in FIG. 17) of inner passages 42 are formed at predetermined intervals in the longitudinal direction of the side walls 37a and 37b. The plurality of inner passages 42 are formed in a circular cross-section having the same cross-sectional shape, and are formed so as to penetrate through the side walls 37a and 37b in the thickness direction. Each inner path 42 formed on the side wall 37a is formed at a position corresponding to each inner path 42 formed on the side wall 37b, and the center lines Y of the corresponding inner paths 42 coincide with each other. . That is, the plurality of inner passages 42 formed on the side wall 37a and the plurality of inner passages 42 formed on the side wall 37b are aligned with each other in the front-rear direction.

An opening on the inner end (right end) side of each inner passage 42 in the side wall 37 a is an inner intake opening 42 a that opens to the outer passage 41. Further, the opening on the outer end (left end) side of each inner passage 42 in the side wall 37 a is an inlet 42 b that opens into the internal space 30 g of the housing 30.
Similarly, the opening on the inner end (left end) side of each inner passage 42 in the side wall 37 b is an inner intake opening 42 a that opens to the outer passage 41. Further, the opening on the outer end (right end) side of each inner passage 42 in the side wall 37 b is an inlet 42 b that opens into the internal space 30 g of the housing 30.

  As described above, the inner path 42 is formed so as to communicate the outer path 41 and the internal space 30 g of the housing 30. Thereby, the air outside the housing 30 is taken into the internal space 30g of the housing 30 via the outer air inlet 41a of the outer passage 41, the inner air inlet 42a of the inner passage 42, and the intake port 42b. Is sucked from the suction port 31a.

  Further, the outer intake port 41a of the outer passage 41 opens forward and rearward, whereas the inner intake port 42a of the inner passage 42 in both side walls 37a and 37b opens rightward and leftward, respectively. That is, the outer intake port 41a and the inner intake port 42a are opened in directions different from each other by 90 degrees.

  The casing 30 is formed with four outer intake ports 41a, two in each of the boxes 37 arranged at the two locations (see FIGS. 14 and 16). A total of 28 inner intake ports 42a are formed in each of 37 (14 pieces = 7 pieces × 2 side walls). The outer intake ports 41a and the inner intake ports 42a are formed such that the sum of the opening areas of the 28 inner intake ports 42a is equal to or greater than the sum of the opening areas of the four outer intake ports 41a. Yes.

  As shown in FIG. 14, the outer passages 41 of the boxes 37 arranged at two locations below the housing 30 are formed so that a pair of forks of a forklift (not shown) are inserted. Specifically, the space in the left-right direction of the outer path 41 in the two boxes 37 is formed to have the same dimension as the space in the left-right direction of the pair of forks. Each outer path 41 is formed in a size into which the fork is inserted.

  According to the air conveyance device 2 of the present embodiment configured as described above, the blower 31 accommodated in the internal space 30g of the housing 30 is connected to the outside passage 41 and the inside of the intake passage 40 from the outside of the housing 30. Air taken into the internal space 30g via the path 42 can be sucked and sent out. At this time, since the outer intake port 41a of the outer passage 41 and the inner intake port 42a of the inner passage 42 are opened in different directions, the noise of the blower 31 generated in the inner space 30g is caused by the inner intake air of the inner passage 42. Direct leakage from the opening 42a to the outside of the housing 30 can be suppressed. Thereby, when conveying the pellets thrown into the blower pipe 34 from the hopper 35 together with the air sucked and sent out by the blower 31, the noise of the blower 31 as an air supply source can be effectively suppressed. .

  Further, the inner paths 42 formed on the side wall 37a of the box 37 are formed at positions corresponding to the inner paths 42 formed on the side wall 37b, and the center lines Y of the inner paths 42 corresponding to each other. Match. As a result, the noise of the blower 31 leaking to the outer path 41 through one inner path 42 out of the two inner paths 42 corresponding to each other passes through the other inner path 42 and returns to the internal space 30g. Since it is easy, the noise which leaks out of the housing | casing 30 from the outer side inlet 41a of the outer side path 41 can be reduced. As a result, the noise of the blower 31 can be further effectively suppressed.

Further, since the sum of the opening areas of the inner intake ports 42a in the inner passage 42 is equal to or greater than the sum of the opening areas of the outer intake ports 41a in the outer passage 41, the total amount of air taken into the outer passage 41 from the outer intake ports 41a is calculated. The inner passage 42 can be taken into the inner space 30 g of the housing 30 from the inner inlet 42 a of the inner passage 42. Thereby, the air taken into the outer side path 41 from the outer side inlet port 41a can be utilized to the maximum extent as the air sucked by the blower 31.
Moreover, the air conveyance apparatus 2 can be easily carried by inserting a pair of forks of a forklift into the outer passages 41 formed at two locations below the casing 30.

[Others]
In the above-described embodiment, the silo input device 1 has described the wood pellet as the storage of the silo 3, but pellets other than wood, livestock feed, and the like may be used as the storage of the silo 3. Moreover, although the inlet apparatus 1 for silos of the said embodiment is supposed to isolate | separate a pellet and conveyance air with a cyclone (cylinder 11, the separation cylinder 19), it isolate | separates a pellet and conveyance air by separation methods other than a cyclone. May be.

  The input tube 13 of the above embodiment is formed to extend straight in the lateral direction, but may be formed in an elbow shape. In addition, the input tube 13 is connected to the cylinder 11 in an offset state with respect to the center (axis C) of the cylinder 11 in plan view, but is connected to the cylinder 11 on the center line of the cylinder 11. May be.

  Although the discharge pipe 14 of the said embodiment is comprised by the horizontal pipe part 14a, the bending pipe part 14b, and the vertical pipe part 14c which are separate members, these pipe parts 14a-14c are formed integrally. There may be. Moreover, the discharge pipe 14 should just be comprised by the horizontal pipe part 14a and the vertical pipe part 14c at least.

  In the above embodiment, the input pipe 13 and the discharge pipe 14 are provided on the cylinder 11, but at least one may be provided on the lid 12. Moreover, the discharge pipe 14 of this embodiment is used as a pipe for feeding the air-carrying pellets into the silo 3, and the injection pipe 13 of this embodiment is used to discharge the carrier air that has been thrown into the silo 3 together with the pellets to the outside. It is good also as piping to do.

  The cylindrical body 11 of the above embodiment is formed in a cylindrical shape, but may be formed in a polygonal cylindrical shape. The lid body 12 of the above embodiment is supported so as to be rotatable with respect to the cylinder body 11 in order to open and close the first insertion port 11a, but may be supported so as to be slidable in the lateral direction. The support 15 of the above embodiment may have other shapes such as a rod in addition to the flat plate member. Further, the support 15 is not necessarily provided.

  In the mounting structure of the silo inlet device 1 of the above embodiment, the band 21 is composed of the band main body 21a and the lower flange 21b which are separate members. However, the band main body 21a and the lower flange 21b are integrally formed. It may be formed. Moreover, although the said attachment structure demonstrated the case where the silo inlet device 1 corresponding to both a drop injection method and an air conveyance method was attached to the silo 3, the silo inlet device 1 corresponding only to an air conveyance method was demonstrated. This can also be applied to the case where the is attached to the silo 3. In this case, the silo inlet device 1 may be configured such that, for example, the cylindrical body 11 is formed in a cylindrical shape, and the lid body 12 is not provided on the cylindrical body 11.

In the above embodiment, the inner peripheral end portion of the lower surface of the upper flange 11b forming the annular space S is constituted by the outer peripheral end portion 11c1 of the lower surface of the flat portion 11c and the inclined surface 11d1 of the inclined portion 11d. What is necessary is just to be comprised by the inclined surface 11d1 of the inclination part 11d at least.
Further, the outer peripheral surface of the seal member 23 is an inner peripheral end portion (such as an inclined surface 11d1) of the lower surface of the upper flange 11b, an upper end portion 3a1 of the outer peripheral surface of the cylindrical portion 3a, and an inner peripheral end portion 21b2 of the upper surface of the lower flange 21b. However, it is only necessary to be in pressure contact with at least the inner peripheral end portion of the lower surface of the upper flange 11b and the upper end portion 3a1 of the outer peripheral surface of the cylindrical portion 3a.

The seal member 23 of the above embodiment is formed in a circular cross section, and is in pressure contact with at least one location on the inner peripheral end of the upper flange 11b and at least one location on the upper end 3a1 of the outer peripheral surface of the cylindrical portion 3a. Other cross-sectional shapes such as a polygonal cross-section may be used as long as they have an allowance.
The fixing means 22 of the above embodiment is constituted by the bolt 22a and the nut 22b, but other fixing means may be used.

  In this specification, reference examples of the mounting structure of the silo inlet device are shown in FIGS. 12 and 13, but as another reference example, the upper flange of FIG. 11b and the lower flange 21b of FIG. 13 may be combined.

Although the air conveyance apparatus 2 of the said embodiment is mounted on the loading platform 6a of the track 6, you may install in the installation place of the silo 3, or its vicinity.
In the above embodiment, the blower 31 is used as the air supply source. However, other air supply sources (such as a compressor) may be used as long as the air is sucked and sent out. Further, at least the air supply source (blower 31) needs to be accommodated in the internal space 30 g of the housing 30, and the hopper 35, the valve 36, and the like may be disposed outside the housing 30.

  In the above embodiment, the outer passage 41 of the intake passage 40 is formed at two locations of the housing 30, but may be formed at only one location or three or more locations of the housing 30. Further, although the outer path 41 penetrates in the front-rear direction of the housing 30, it may penetrate in the left-right direction of the housing 30. Further, the outer path 41 does not have to penetrate the housing 30. Further, the outer path 41 may be formed at a location other than the lower portion of the housing 30.

  The outer passage 41 is formed in a box 37 having a hollow cross section, but may be formed in a box having another cross section such as a hollow cross section. Further, the outer path 41 may be formed using a member other than the box 37. For example, the outer path 41 may be formed by combining the lower wall 30d of the housing 30 and the channel material.

  In the above-described embodiment, among all the inner paths 42 formed on the side wall 37a and the side wall 37b of the box 37, the center lines Y of the inner paths 42 corresponding to each other coincide with each other. It does not need to match, and only some of the center lines Y of the inner paths 42 corresponding to each other may match.

  In the above embodiment, the inner passage 42 of the intake passage 40 is formed in a circular cross section, but may be formed in another cross sectional shape. The inner passage 42 is formed on the left and right side walls 37a and 37b of the box 37, but may be formed on the upper wall portion. Further, the number of the inner passages 42 is not limited to the above embodiment, and may be formed in at least one place of the box 37. In the present embodiment, the through-hole formed in the box 37 is used as the inner path 42, but the inner path 42 may be formed by a member other than the box 37. For example, a hollow cylindrical member may be penetrated and connected to the through hole formed in the box 37, and the hollow portion in the cylindrical member may be used as the inner path 42.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

3 Silo 3a Tube 3a1 Upper end of outer peripheral surface 11 Tube 11b Upper flange 11d1 Inclined surface 13 Input tube 14 Discharge tube 21 Band 21a Band body 21b Lower flange 21b2 Inner peripheral edge 22 on upper surface 22 Fixing means 23 Seal member S Annular space

Claims (2)

A silo inlet device attached to a cylindrical portion having an upper end opening provided at an upper end portion of a silo,
A band having a band main body fastened and fixed to the outer peripheral surface of the cylindrical portion, and an annular lower flange extending laterally outward from the upper end of the band main body,
A cylindrical body in which an annular upper flange placed on the lower flange is provided on the lower end opening side;
A charging pipe provided in the cylindrical body, for charging the stored material into the silo by air conveyance;
A discharge pipe that is provided in the cylinder and discharges the carrier air that has been put into the silo together with the stored material;
A fixing means for tightening and fixing the lower flange and the upper flange placed on the lower flange in the vertical direction;
In a state where the upper flange is mounted on the lower flange, at least one of the inner peripheral end portion of the upper surface of the lower flange and the inner peripheral end portion of the lower surface of the upper flange is from the outer peripheral side to the inner peripheral side. An inclined surface that is inclined so that these flanges are separated from each other in the vertical direction is formed.
The band body is formed with an annular space at least surrounded by an upper end portion of the outer peripheral surface of the cylindrical portion, an inner peripheral end portion of the upper surface of the lower flange, and an inner peripheral end portion of the lower surface of the upper flange. Are fastened and fixed to the outer peripheral surface of the cylindrical portion,
Arranged in the annular space and in a state where the lower flange and the upper flange are fastened and fixed by the fixing means, at least the inner peripheral end portion of the lower surface of the upper flange and the upper end portion of the outer peripheral surface of the cylindrical portion are pressed against each other. A silo inlet device further comprising an annular seal member.   The silo inlet apparatus according to claim 1, wherein the inclined surface is formed at an inner peripheral end portion of a lower surface of the upper flange.

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