JP7061886B2 - Air transfer device - Google Patents

Description

The present invention relates to an air transfer device.

For example, in cold regions and the like, silos for storing wood pellets used as a heat source for heating devices are installed outdoors. As a method of charging pellets into such a silo, there is a charging method using an air transport device. In this charging method, for example, an air blowing pipe extending from a blower (air supply source) of an air transporting device installed on the ground side and a feeding port provided at the upper end of the silo are connected by a transport pipe or the like to carry air. The pellets charged into the apparatus are charged into the silo from the charging port via the transport pipe or the like by air transportation (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 4-1-2937

In the conventional air transfer device, in order to suppress noise during air transfer of pellets, a blower as a noise source is housed in a housing. However, since an intake port for the blower to take in air is formed in this housing, noise leaks to the outside from the intake port, and as a result, the noise of the blower can be effectively suppressed. There was a problem that it could not be done.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an air transport device capable of effectively suppressing noise of an air supply source.

(1) In the present invention, an air supply source that sucks and sends out air, an internal space in which the air supply source is housed, and an intake air for taking in air sucked by the air supply source from the outside into the internal space. An air transport device including a housing having a path, wherein the intake passage has an outer road that is directly communicated with the outside of the housing and not directly communicated with the internal space, and the outer road. An inner air passage that communicates with the inner space, and an outer intake port that opens to the outside of the housing in the outer road and an inner air intake that opens to the outer road in the inner road are different from each other. An air carrier that opens in the direction.

According to the present invention, the air supply source housed in the internal space of the housing sucks and sends out the air taken into the internal space from the outside of the housing through the outer passage and the inner passage of the intake passage. can do. At that time, since the outer intake port of the outer path and the inner intake port of the inner path are opened in different directions, the noise of the air supply source generated in the internal space is transmitted from the inner intake port of the inner path to the housing. It is possible to suppress the leakage directly to the outside of the. As a result, the noise of the air supply source can be effectively suppressed.

(2) The inner road has one or more inner air intake ports, the outer road has one or more outer air intake ports, and the total opening area of the inner air intake ports in the inner road. However, it is preferable that it is equal to or larger than the total opening area of the outer intake port in the outer passage.
In this case, since the entire amount of air taken into the outer passage from the outer intake port can be taken into the internal space of the housing from the inner intake port of the inner passage, the air taken into the outer passage from the outer intake port is supplied as air. It can be used to the maximum as the air sucked by the source.

(3) It is preferable that the intake passage has at least two inner passages, and the center lines of the at least two inner passages coincide with each other.
In this case, the noise of the air supply source leaking to the outer road through one of the inner roads of the two inner roads tends to return to the inner space from the other inner road, so that the noise is easily returned to the inner space from the outer intake port of the outer road. It is possible to reduce the noise leaking to the outside of the housing. As a result, the noise of the air supply source can be suppressed more effectively.

(4) A blower pipe that is connected to the air supply source and blows air sent from the air supply source, and a hopper for throwing a transported object that is conveyed together with the air in the blower pipe into the blower pipe. It is preferably attached to the housing.
In this case, it is possible to effectively suppress the noise of the air supply source when the conveyed object thrown into the blower pipe from the hopper is conveyed together with the air sucked and sent by the air supply source.

(5) It is preferable that the outer road is formed at two points of the housing so that a pair of forks of the forklift can be inserted respectively.
In this case, the air transport device can be easily carried by inserting a pair of forks of the forklift into the outer paths formed at the two locations of the housing.

According to the air transport device of the present invention, the noise of the air supply source can be effectively suppressed.

It is a side view which shows the silo loading system provided with the silo loading port device and the air transfer device which concerns on one Embodiment of this invention, and shows the state which the pellet is charged into the silo by the drop loading method. It is a side view which shows the throwing system for a silo, and shows the state which the pellet is put into a silo by an air transfer method. It is an enlarged side view which shows the slot device for a silo. It is an enlarged plan view which shows the slot device for a silo. FIG. 4 is a cross-sectional view taken along the line I-I in FIG. It is a top view which shows the modification of the silo inlet device. FIG. 6 is a cross-sectional view taken along the line II-II of FIG. FIG. 4 is a cross-sectional view taken along the line III-III in FIG. It is an exploded perspective view which shows the attachment structure to the silo of the silo inlet device. It is an enlarged sectional view which shows the modification of the attachment structure of the silo inlet device. It is an enlarged sectional view which shows the other modification of the mounting structure of the silo inlet device. It is an enlarged sectional view which shows the reference example of the mounting structure of the silo inlet device. It is an enlarged sectional view which shows the other reference example of the mounting structure of the silo inlet device. It is a front view which shows the air transport device. It is a top view which shows the air transport device. It is a right side view which shows the air transport device. It is a perspective view which shows the box. FIG. 17 is a cross-sectional view taken along the line IV-IV 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 loading system including a silo loading port device 1 and an air transport device 2 according to an embodiment of the present invention. In FIGS. 1 and 2, in the silo charging system of the present embodiment, wood pellets (storage) used as a heat source for a heating device (not shown) are charged 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 pedestal 4 installed on the ground. A tubular portion 3a having an upper end opening is provided at the upper end portion of the silo 3. The upper end opening of the tubular portion 3a is a loading port 3b (see FIG. 5) for dropping and loading pellets. That is, the silo 3 is installed by adopting the drop-injection method as the pellet-injection method.

The lower portion of the silo 3 is formed in a conical cylindrical shape, and the lower end of the silo 3 is formed with an openable and closable outlet 3c. As a result, the silo 3 stores the pellets charged inside from the charging port 3b, and by opening the outlet 3c, the pellets stored inside can be taken out to the outside.

The pellets charged into the silo 3 are housed in a predetermined amount in each of a plurality of flexible container bags 5. The flexible container back 5 has a container back main body 5a in which pellets are housed, and a hooking portion 5b fixed to the container back main body 5a. The container back main body 5a is formed in a substantially rectangular parallelepiped shape, and a discharge port 5c capable of discharging pellets housed inside is provided on the bottom surface of the container back main body 5a so as to be openable and closable.

The plurality of flexible container bags 5 are loaded on the loading platform 6a of the truck 6 and transported to the installation location of the silo 3. The truck 6 is equipped with a crane 7 having a multi-stage 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 hooking portion 5b of the flexible container back 5 on the hanging hook 7b. In the present embodiment, the air transport device 2 described later is also mounted on the loading platform 6a of the truck 6.

[Silo slot device]
A silo slot device 1 is retrofitted to the upper end of the tubular portion 3a of the silo 3. The silo charging port device 1 is capable of charging pellets into the silo 3 by either a drop charging method or an air transporting method. That is, the silo slot device 1 of the present embodiment may be either a drop-in method or an air transfer 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 pellets in the flexible container 5 are charged into the silo 3 by a drop charging method using the silo charging port device 1. As shown in FIG. 1, in the drop loading method using the silo slot device 1, the flexible container back 5 is lifted by the crane 7 of the truck 6 to directly above the silo slot device 1, and the flexible container back is in that state. This is a method in which the pellets in the 5 are dropped and thrown into the silo 3 from the discharge port 5c via the silo inlet device 1.

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

The conveyed air supplied into the silo 3 together with the pellets is discharged to the outside from the lower end portion 10a of the discharge hose 10 extending downward from the silo inlet device 1 along the gantry 4. As a result, the silo inlet device 1 also has a function as a separation device for separating the pellet and the conveyed air. The inlet hose 9 and the discharge hose 10 are retrofitted to the gantry 4 when the silo inlet 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 conveyed air is provided at the lower end portion 10a of the discharge hose 10, and the cyclone device 1 is used for the cyclone inlet device 1. The pellets that could not be separated in the above 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. In FIGS. 3 and 4, the silo input port device 1 includes a tubular body 11, a lid body 12, an input pipe 13, a discharge pipe 14, and a support 15.
The tubular body 11 is formed in a cylindrical shape, and the lower end opening of the tubular body 11 is provided at the upper end portion of the tubular portion 3a so as to communicate with the inside of the silo 3. At the upper end of the cylinder 11, a first charging port 11a (see FIG. 5) is formed so that pellets can be dropped and charged into the silo 3.

The lid body 12 has a circular lid body 12a that can open and close the first input 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 tubular body 11. One end of the handle 12b (the right end in FIG. 3) is supported so as to be vertically rotatable with respect to the bracket 16 fixed to the upper end of the outer peripheral surface of the tubular body 11.

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

Gripping portions 12b1 for the operator to grip the handle 12b are formed at two locations in the middle portion in the longitudinal direction of the handle 12b. Further, an engaging groove 12b2 is formed at the other end of the handle 12b (the left end in FIG. 3).

A lock device 17 for locking the handle 12b at the closed position is provided at the upper end of the outer peripheral surface of the cylinder 11. The locking device 17 includes an engaging member 17a rotatably supported up and down with respect to a bracket 18 fixed to the outer peripheral surface of the tubular body 11, and a handle 17b screwed to the tip of the engaging member 17a. ing. The engaging member 17a has an engaging position (solid line position in FIG. 3) engaged with the engaging groove 12b2 of the handle 12b in the closed position and a disengaging position (FIG. 3) in which the engagement with the engaging groove 12b2 is disengaged. It is possible to rotate up and down between the two-dot chain line position).

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 engaging member 17a is in the engaging position. As a result, the engaging member 17a is held in the engaging position, and the handle 12b is locked in the closed position. On the lower surface of the lid main body 12a, a seal (not shown) that presses against the peripheral edge of the first loading port 11a of the tubular body 11 when the handle 17b is rotated in the tightening direction is provided.

FIG. 5 is a cross-sectional view taken along the line I-I of FIG. In FIG. 5, for convenience of explanation, the lid 12 and the locking device 17 are not shown. In FIGS. 4 and 5, the charging pipe 13 is a pipe for charging pellets air-conveyed from the air transport device 2 into the silo 3. The input pipe 13 of this embodiment is made of a straight pipe.

One end (right end in FIG. 5) of the input pipe 13 is fixed to the side wall of the cylinder 11 so that the opening 13a on the one end side communicates with the inside of the cylinder 11 (inside the silo 3). The opening 13a of the input pipe 13 is opened sideways. Here, the "horizontal opening" means that the opening is within 45 ° above and below the horizon.
At the other end of the charging pipe 13 (left end in FIG. 5), a second charging port 13b is formed so that pellets conveyed by air can be charged into the silo 3. The upper end of the charging hose 9 is connected to the second charging port 13b of the charging pipe 13 (see FIG. 2).

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

In FIGS. 4 and 5, the discharge pipe 14 is a pipe for discharging the conveyed 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 portion 14a which is a straight pipe, a bent pipe portion 14b which is an elbow pipe, and a vertical pipe portion 14c which is a straight pipe. ing.

One end side of the lateral pipe portion 14a penetrates the side wall of the tubular body 11 and is supported by the side wall. The other end of the transverse pipe portion 14a extends laterally toward the center (axis line C) of the tubular body 11. At one end of the horizontal pipe portion 14a protruding to the outside of the cylinder 11, a discharge port 14a1 capable of discharging the conveyed air introduced into the silo 3 together with the pellets to the outside is formed. The discharge port 14a1 is open on the same side (left side in FIG. 4) as the second input port 13b of the input pipe 13. The upper end of the discharge hose 10 is connected to the discharge port 14a1 (see FIG. 2).

The bent pipe portion 14b is arranged in the tubular body 11. One end of the bent pipe portion 14b is connected to the lateral inner end of the horizontal pipe portion 14a, and the other end of the bent pipe portion 14b is connected to the upper end of the vertical pipe portion 14c.

The upper end side of the vertical pipe portion 14c is arranged in the tubular body 11, and the lower end side of the vertical pipe portion 14c is arranged in the silo 3 below the tubular portion 3a. The opening 14c1 on the lower end side of the vertical pipe portion 14c opens downward and communicates with the inside of the silo 3. Here, "opening downward" means that the opening is within ± 45 ° with respect to the vertical downward direction.
As a result, the opening 13a of the input pipe 13 (the opening of one pipe) is arranged above the opening 14c1 of the discharge pipe 14 (the opening of the other pipe). Here, "arranged" that the opening of one tube is "above" the opening of the other tube means that 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 located on the upper side.

The discharge pipe 14 is arranged in a state where the axis X of the vertical pipe portion 14c is offset with respect to the axis C of the tubular body 11. As a result, as compared with the case where the axis X coincides with the axis C, the pellets dropped and thrown from the first charging port 11a are less likely to hit the discharge pipe 14, so that the discharge pipe 14 is suppressed from being damaged. be able to.

The support 15 is made of a horizontally long flat plate member and is arranged in the tubular body 11. One end of the support 15 in the longitudinal direction is welded to the inner side surface of the tubular body 11, and the other end of the support 15 in the longitudinal direction is welded to the outer peripheral surface of the bent pipe portion 14b. As a result, one end of the horizontal pipe portion 14a in the discharge pipe 14 is supported by the side wall of the tubular body 11, and the other end side (bent pipe portion 14b) of the horizontal pipe portion 14a in the discharge pipe 14 is supported by the tubular body 11 by the support body 15. It is supported by the side wall of. That is, one end side and the other end side of the horizontal pipe portion 14a in the discharge pipe 14 are supported in a double-sided manner with respect to the side wall of the tubular body 11.

As described above, according to the silo input port device 1 of the present embodiment, by opening the first input port 11a of the tubular body 11 by the lid body 12, the pellets in the flexible container bag 5 lifted by the crane 7 are the first. 1 It can be dropped into the silo 3 from the slot 11a (see FIG. 1). Further, with the first inlet 11a of the cylinder 11 closed by the lid 12, the second inlet 13b of the inlet pipe 13 and the blower 31 of the air transfer device 2 on the ground side are connected to the connecting hose 8 and the inlet hose. By connecting with 9, the pellets charged into the air transfer device 2 from the flexible container bag 5 can be charged into the silo 3 from the second input port 13b by air transfer, and the transfer air in the silo 3 can be supplied. It can be discharged to the outside from the discharge port 14a1 of the discharge pipe 14 (see FIG. 2).

As a result, the pellets can be charged into the silo 3 by either the drop charging method or the air transport method. In addition, these two types of charging methods can be used properly depending on the type of pellet. For example, if the pellets are relatively soft and easily crushed, the drop-in method can be used, and if the pellets are relatively hard, the air transfer method can be used.

Further, since the input pipe 13 and the discharge pipe 14 are provided in the tubular body 11, the lid body 12 is lighter than the case where the input pipe 13 and the discharge pipe 14 are provided in the lid body 12. As a result, the first input port 11a can be easily opened and closed by the lid body 12.

Further, 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. It is open in the direction. As a result, it is possible to prevent the pellets charged into the silo 3 from the opening 13a of the charging pipe 13 by air transport from being discharged to the outside from the opening 14c1 of the discharge pipe 14 together with the transport air.

Further, since the opening 13a of the input pipe 13 is arranged 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. It is open at the position. As a result, it is possible to further suppress the pellets thrown into the silo 3 from the opening 13a of the charging pipe 13 by air transport from being discharged to the outside from the opening 14c1 of the discharge pipe 14 together with the transport air.

Further, one end of the horizontal pipe portion 14a in the discharge pipe 14 is supported by the side wall of the tubular body 11, and the other end side (bent pipe portion 14b) of the horizontal pipe portion 14a in the discharge pipe 14 is supported by the tubular body 11 by the support body 15. It is supported by the side wall of. 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 double-sided manner with respect to the side wall of the cylinder body 11, and therefore fall into the cylinder body 11 from the first input port 11a. Even if the charged pellets hit the discharge pipe 14, the load acting on the support portion of the discharge pipe 14 on the side wall of the tubular body 11 can be reduced.

Further, the cylinder 11 has a function as a vertical wall for guiding the pellets into the silo 3 when the pellets are dropped and thrown from the first charging port 11a, and the pellets are used in the cylinder 11 when the pellets are air-conveyed. Since it also has a function as a cylindrical wall of a cyclone to be inserted into the silo 3 while rotating spirally along the inner side surface, the number of parts of the silo input port device 1 is reduced, and it can be manufactured at low cost. can.

[Modification example of slot device for silo]
FIG. 6 is a plan view showing a modified example of the silo inlet device 1, and FIG. 7 is a cross-sectional view taken along the line II-II of FIG. In FIGS. 6 and 7, for convenience of explanation, the lid 12 and the locking device 17 are not shown. In FIGS. 6 and 7, in the input pipe 13 of the present modification, the portion arranged outside the cylinder 11 is formed in a cylindrical shape, and the portion arranged inside through the cylinder 11 is rectangular. It is formed in a tubular shape.

The discharge pipe 14 of the present modification has the discharge port 14a1 open on the opposite side (right side in FIG. 6) of the second input port 13b of the input pipe 13. Further, the vertical pipe portion 14c is formed shorter in the axial direction than the vertical pipe portion 14c shown in FIG. 5, and the entire vertical pipe portion 14c is arranged in the tubular body 11.

The silo input port device 1 of this modification includes a celestial cylindrical separation cylinder 19 arranged in the cylinder 11. The separation cylinder 19 is formed to have a diameter larger than that of the vertical pipe portion 14c of the discharge pipe 14, and is arranged coaxially with the axis C of the cylinder body 11. Further, the separation cylinder 19 of the present embodiment is arranged so as to straddle the cylinder 11 and the cylinder 3a of the silo 3, and the opening 19a on the lower end side of the separation cylinder 19 communicates with the inside of the cylinder 3a. There is.

In the plan view of FIG. 6, the laterally inner end of the input pipe 13 is connected to the upper portion of the side wall 19b of the separation cylinder 19 in a state of being offset from the center (axis line C) of the separation cylinder 19. An opening of the input pipe 13 in the separation cylinder 19 with a part of the inner surface extending in the axial direction (lateral direction) of the input pipe 13 tangentially connected to the inner side surface (inner peripheral surface) of the separation cylinder 19. The portions 13a communicate with each other.

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

The lower end of the vertical pipe portion 14c of the discharge pipe 14 is connected to the top wall 19c of the separation cylinder 19, and the opening 14c1 of the discharge pipe 14 communicates with the inside of the separation cylinder 19. As a result, the conveyed air introduced into the separation cylinder 19 from the opening 13a of the charging pipe 13 together with the pellets can be discharged to the outside from the opening 14c1 of the discharge pipe 14.

With the above configuration, in this modification, one end side of the horizontal pipe portion 14a in the discharge pipe 14 is supported by the side wall of the tubular body 11, and the other end side (vertical pipe portion 14c) of the horizontal pipe portion 14a in the discharge pipe 14 is supported. It is supported on the side wall of the cylinder 11 via the separation cylinder 19 and the input 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 double-sided manner with respect to the side wall of the cylinder 11, so that the pipe is dropped into the cylinder 11 from the first charging port 11a. Even if 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 tubular body 11 can be reduced. Further, since the other end side of the horizontal pipe portion 14a in the discharge pipe 14 is supported by the side wall of the tubular body 11 via the separation cylinder 19 and the input pipe 13, the horizontal pipe portion 14a of the horizontal pipe portion 14a is supported with respect to the side wall of the tubular body 11. A dedicated support 15 (see FIG. 5) for supporting the other end side is not required.

[Mounting structure of slot device for silo]
FIG. 8 is a cross-sectional view taken along the line III-III of FIG. FIG. 9 is an exploded perspective view showing a mounting structure of the silo 3 of the silo slot device 1 with respect to the tubular portion 3a. In FIGS. 8 and 9, for convenience of explanation, the lid 12 and the locking device 17 are not shown.
In FIGS. 8 and 9, the silo slot device 1 further includes a band 21, a fixing means 22, and a sealing member 23.

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

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

A plurality of pedestals 21c (four in FIG. 9) projecting outward in the radial direction are provided on the outer peripheral surface of the band main body 21a 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 the upper plate portion thereof. The through hole 21c1 is an elongated hole extending in the width direction of the pedestal 21c.

A lower flange 21b made of an annular flat plate member is placed on the upper surface of the pedestal 21c. The inner diameter of the lower flange 21b is set to be slightly larger than the outer diameter of the tubular portion 3a. A plurality of through holes 21b1 (4 in FIG. 9) are formed in the lower flange 21b at predetermined intervals in the circumferential direction. Each through hole 21b1 is an elongated hole extending in the radial direction of the lower flange 21b. The lower flange 21b is placed on the pedestal 21c so that the through holes 21b1 and the through holes 21c1 of the pedestal 21c coincide with each other.

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

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

The mounting portion 11e is made of a channel material that opens upward, and one end portion in the longitudinal direction (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 mounting portion 11e. The through hole 11e2 is an elongated 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 is composed of a plurality of bolts 22a and nuts 22b. The bolts 22a are inserted into the through holes 11e2, 21b1, 21c1 of the lower plate portion 11e1, the lower flange 21b, and the pedestal 21c, which are overlapped with each other. Then, by screwing the nut 22b into the bolt 22a and tightening it in the vertical direction in this state, the lower plate portion 11e1, the lower flange 21b, and the pedestal 21c are integrally connected. As a result, the lower flange 21b of the band 21 fixed to the outer peripheral surface of the tubular portion 3a of the silo 3 and the upper flange 11b of the tubular body 11 are tightened and fixed, and the silo inlet device 1 is fixed to the tubular portion 3a of the silo 3. Is attached.

With the lower plate portion 11e1 of the upper flange 11b mounted 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) gradually moves from the outer peripheral end to 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 portion 3a1 of the outer peripheral surface of the tubular portion 3a, the inner peripheral end portion 21b2 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 peripheral end portion 11c1 of the lower surface of the flat portion 11c) and An annular space S surrounded by these surfaces is formed between the inclined portion 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 is formed with a circular cross section. The seal member 23 suppresses the conveyed air in the silo 3 from leaking to the outside of the silo inlet device 1 when the pellets are charged into the silo 3 by the air conveying method. As described above, the lower surface of the lid main body 12a is provided with a seal that presses against the peripheral edge of the first input port 11a of the tubular body 11, so that the upper end of the tubular body 11 and the lid main body 12a , The conveyed air in the silo 3 does not leak to the outside.

The seal member 23 is arranged 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 such that the inclined surface 11d1 of the upper flange 11b, the upper end portion 3a1 of the outer peripheral surface of the tubular portion 3a, and the inner peripheral end portion 21b2 of the upper surface of the lower flange 21b in the annular space S. It is set larger than the diameter of the virtual inscribed circle that touches each. As a result, the outer peripheral surface of the seal member 23 has the inclined surface 11d1 of the upper flange 11b, the upper end portion 3a1 of the outer peripheral surface of the tubular portion 3a, and the lower surface in a state where the lower flange 21b and the upper flange 11b are tightened and fixed by the fixing means 22. It is pressure-welded to the inner peripheral end portion 21b2 on the upper surface of the flange 21b (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 match.

From the above, by pressing the outer peripheral surface of the seal member 23 against the upper end portion 3a1 of the outer peripheral surface of the tubular portion 3a, the upper end of the tubular portion 3a and the lower end of the upper flange 11b on the tubular body 11 side (lower surface of the flat portion 11c). ), And the conveyed air flowing out to the outside of the tubular portion 3a can be prevented from leaking to the outside from between the outer peripheral surface of the tubular portion 3a and the inner peripheral surface of the band main body 21a.
Further, when the outer peripheral surface of the seal member 23 is in pressure contact with the inclined surface 11d1 of the upper flange 11b, the conveyed air flowing out to the outside of the tubular portion 3a as described above is transferred to 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 to the outside from between the inclined portion 11d and the outer peripheral end).

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 tubular portion 3a at the upper end of the silo 3, and the pellets are conveyed in the silo 3 by air transfer. The upper flange 11b of the cylinder 11 provided with the charging pipe 13 to be charged into the silo and the discharging pipe 14 to discharge the conveyed air charged into the silo 3 together with the pellets was placed on the lower flange 21b of the band 21. In this state, the lower flange 21b and the upper flange 11b are tightened and fixed by the fixing means 22.

As a result, the silo slot device 1 can be easily attached to the tubular portion 3a at the upper end of the existing silo 3 without processing the silo 3. In particular, it 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 transport mounting method after installing the silo 3.

An annular space S surrounded by an upper end portion 3a1 on the outer peripheral surface of the tubular portion 3a, an inner peripheral end portion 21b2 on the upper surface of the lower flange 21b, and an inner peripheral end portion (inclined surface 11d1 or the like) on the lower surface of the upper flange 11b. By tightening and fixing the lower flange 21b and the upper flange 11b in the vertical direction by the fixing means 22 in the state where the seal member 23 is arranged, the seal member 23 can be attached to the inclined surface 11d1 of the upper flange 11b and the outer peripheral surface of the tubular portion 3a. It is in pressure contact with the upper end portion 3a1 of.

As a result, the conveyed air flowing out of the cylinder 3a from between the upper end of the cylinder 3a of the silo 3 and the lower end of the upper flange 11b (lower surface of the flat portion 11c) on the cylinder 11 side is discharged to the outside of the cylinder 3a. A single sealing member 23 leaks to the outside from between the outer peripheral surface of the band body 21a and the inner peripheral surface of the band 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 by. Therefore, the silo inlet device 1 can be attached with a small number of parts, and air leakage after the silo inlet device 1 can be attached can be suppressed.

Further, since the inclined surface 11d1 is formed on the inner peripheral end portion of the lower surface of the upper flange 11b, the conveyed air flowing out to the outside of the tubular portion 3a as described above is once on the inclined surface 11d1 on the lower surface of the upper flange 11b. After hitting, it hits the pressure-welded portion of the seal member 23. As a result, the momentum when the conveyed air hits the seal member 23 can be relaxed by the inclined surface 11d1, so that the seal performance can be improved.

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

The upper plate portion of the pedestal 21c has a base portion 21c2 extending diagonally upward from the upper end of the band main body 21a 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 a bolt 22a is inserted is formed in the front portion 21c3.

The lower flange 21b has 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 mounted on the pedestal 21c. It has 21b4 and. A through hole 21b1 through which a 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 to the inner peripheral end.

As a result, the upper end portion 3a1 of the outer peripheral surface of the tubular portion 3a, the inner peripheral end portion (inclined surface 21b5) on the upper surface of the lower flange 21b, and the inner peripheral end portion 11c3 on 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 has the inner peripheral end portion 11c3 and the tubular portion 3a on the lower surface of the upper flange 11b in a state where the lower flange 21b and the upper flange 11b are tightened and fixed by the fixing means 22. It is pressure-welded to the upper end portion 3a1 of the outer peripheral surface and the inclined surface 21b5 of the lower flange 21b, respectively.

As a result, 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 tubular portion 3a, so that the conveyed air flowing outward from the upper end of the tubular portion 3a is transferred to the outer peripheral surface of the tubular portion 3a and the band body 21a. It is possible to suppress leakage from the inner peripheral surface of the surface to the outside.
Further, when 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 conveyed air flowing outward from the upper end of the tubular portion 3a is transferred to the upper surface of the lower flange 21b (flat portion 21b4). It is possible to suppress leakage to the outside from between the upper flange 11b and the lower surface of the upper flange 11b.

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 and the lower flange 21b and the pedestal 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 pedestal 21c of this modification are the same as the lower flange 21b and the pedestal 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. As a result, the upper end portion 3a1 of the outer peripheral surface of the tubular portion 3a, the inner peripheral end portion (inclined surface 21b5) on the upper surface of the lower flange 21b, and the inner peripheral end portion (outer circumference of the lower surface of the flat portion 11c) on the lower surface of the upper flange 11b. 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 arranged in the annular space S has the inclined surface 11d1 of the upper flange 11b and the upper end of the outer peripheral surface of the tubular portion 3a in a state where the lower flange 21b and the upper flange 11b are tightened and fixed by the fixing means 22. It is pressure-welded to the inclined surface 21b5 of the portion 3a1 and the lower flange 21b, respectively.

As a result, 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 tubular portion 3a, so that the conveyed air flowing outward from the upper end of the tubular portion 3a is transferred to the outer peripheral surface of the tubular portion 3a and the band body 21a. It is possible to suppress leakage from the inner peripheral surface of the surface to the outside.
Further, when the outer peripheral surface of the seal member 23 is in pressure contact with the inclined surface 11d1 of the upper flange 11b, the conveyed air flowing outward from the upper end of the tubular portion 3a is transferred to the upper surface of the lower flange 21b (flat portion 21b4) and the upper flange 11b. It is possible to suppress leakage to the outside from between the lower surface of the surface (particularly, the outer peripheral end of the inclined portion 11d).

[Reference example of mounting structure of silo slot device]
FIG. 12 is an enlarged cross-sectional view showing a reference example of the mounting structure of the silo slot 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 tubular portion 3a. The band 21 is fixed by pressing the outer peripheral surface of the band main body 21a against the inner peripheral surface of the tubular portion 3a by expanding the diameter of the band main body 21a. 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 radially inward of the tubular portion 3a. A through hole 21b1 through which a bolt 22a is inserted is formed at the inner peripheral end of the lower flange 21b.

An annular upper flange 11b extending inward in the radial direction is provided on the lower end opening side of the tubular body 11. The upper flange 11b is fixed to the annular flat portion 11c fixed to the lower end of the tubular 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. It has an annular mounting portion 11e. The mounting portion 11e is mounted on the upper surface of the lower flange 21b, and the mounting portion 11e is formed with a through hole 11e2 into which a bolt 22a is inserted.

The bolts 22a of the fixing means 22 are inserted into the through holes 11e2 and 21b1 of the mounting portion 11e and the lower flange 21b which are overlapped with each other. Then, in this state, the nut 22b is screwed into the bolt 22a and tightened in the vertical direction, so that the mounting portion 11e and the lower flange 21b are integrally connected. As a result, the lower flange 21b of the band 21 fixed to the inner peripheral surface of the tubular portion 3a of the silo 3 and the upper flange 11b of the tubular body 11 are tightened and fixed, and the silo inlet device is fixed to the tubular portion 3a of the silo 3. 1 is attached.

With the mounting portion 11e of the upper flange 11b mounted on the lower flange 21b, the lower surface of the inclined portion 11d has the lower flange 21b and the upper flange 11b in the vertical direction from the inner peripheral end to the outer peripheral end thereof. The inclined surface 11d1 is inclined so as to be separated from each other. As a result, the upper end portion 3a2 of the inner peripheral surface of the tubular portion 3a, the outer peripheral end portion 21b6 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 inner peripheral end portion 11c3 of the lower surface of the flat portion 11c). An annular space S surrounded by these surfaces is formed between the inclined portion 11d and the inclined surface 11d1).

An annular seal member 23 is arranged in the annular space S. The outer peripheral surface of the seal member 23 has the inclined surface 11d1 of the upper flange 11b, the upper end portion 3a2 of the inner peripheral surface of the tubular portion 3a, and the lower flange 21b in a state where the lower flange 21b and the upper flange 11b are tightened and fixed by the fixing means 22. It is pressure-welded to the outer peripheral end portion 21b6 of the upper surface of the above surface.

As a result, the outer peripheral surface of the seal member 23 is in pressure contact with the inclined surface 11d1 of the upper flange 11b, so that the transport flows out from between the lower surface of the upper flange 11b (mounting portion 11e) and the upper surface of the lower flange 21b into the annular space S. Preventing air from moving radially outward along the inclined surface 11d1 of the upper flange 11b and leaking to the outside from between the upper end of the tubular portion 3a and the lower end of the upper flange 11b (lower surface of the flat portion 11c). Can be done.

Further, when 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 on the inner peripheral surface of the tubular portion 3a, the conveyed air flowing out to the annular space S as described above is discharged. , The upper end of the lower flange 21b moves upward along the upper end 3a2 of the inner peripheral surface of the tubular portion 3a via the outer peripheral end portion 21b6, and the upper end of the tubular portion 3a and the lower end of the upper flange 11b (flat portion 11c). It is possible to suppress leakage to the outside from between the bottom surface).

FIG. 13 is an enlarged cross-sectional view showing another reference example of the mounting structure of the silo slot device. This reference example is a modification of FIG. 12, and the upper flange 11b of the tubular body 11 is composed of only an annular flat portion 11c fixed to the lower end of the tubular body 11. A through hole 11c2 through which a 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 a 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 thereof.

As a result, the upper end portion 3a2 of the inner peripheral surface of the tubular portion 3a, the inner peripheral end portion (inclined surface 21b5) on the upper surface of the lower flange 21b, and the outer peripheral end portion 11c1 on 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 inside the outer peripheral end portion 11c1 and the tubular portion 3a of the lower surface of the upper flange 11b in a state where the lower flange 21b and the upper flange 11b are tightened and fixed by the fixing means 22. It is pressure-welded to the upper end 3a2 of the peripheral surface and the inclined surface 21b5 of the lower flange 21b, respectively.

As a result, the outer peripheral surface of the seal member 23 is in pressure contact with the outer peripheral end portion 11c1 of the lower surface of the upper flange 11b, so that the lower surface of the upper flange 11b and the upper surface of the lower flange 21b (flat portion 21b4) are formed into the annular space S. The outflowed conveyed air moves radially outward along the outer peripheral end portion 11c1 of the lower surface of the upper flange 11b, and leaks to the outside from between the tubular portion 3a and the lower end of the upper flange 11b (the lower surface of the flat portion 11c). Can be suppressed.

Further, the outer peripheral surface of the seal member 23 is pressed against the inclined surface 21b5 of the lower flange 21b and the upper end portion 3a2 of the inner peripheral surface of the tubular portion 3a, so that the conveyed air flowing out to the annular space S as described above is released to the lower flange. It moves upward along the upper end portion 3a2 of the inner peripheral surface of the tubular portion 3a via the inclined surface 21b5 of the 21b, and from between the upper end of the tubular portion 3a and the lower end of the upper flange 11b (lower surface of the flat portion 11c). It is possible to suppress leakage to the outside.

[Air transfer device]
FIG. 14 is a front view showing the air transfer device 2, and FIG. 15 is a plan view showing the air transfer device 2. In FIGS. 14 and 15, in the air transport device 2 of the present embodiment, a blower (air supply source) 31, a motor 32, a control panel 33, a blower pipe 34, a hopper 35, and a valve are provided in the internal space 30 g of the housing 30. It is configured to accommodate 36. 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 has 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 internal space 30 g 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 for opening / closing the 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 the air and a delivery port 31b for sending out the air. The blower 31 of the present embodiment is arranged in a substantially central portion of an internal space of 30 g. The suction port 31a opens upward, and the delivery port 31b opens upward.

The motor 32 is a drive source for driving the blower 31, and is arranged on the left side of the internal space 30 g.
The control panel 33 drives and controls the motor 32 and the valve 36, and is arranged behind the motor 32 on the left side of the internal space 30 g. Note that FIG. 14 omits the illustration of the control panel 33.

FIG. 16 is a right side view showing the air transfer device 2. In FIGS. 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 portion 34a whose upper end is connected to the outlet 31b of the blower 31 and extends downward, and a second pipe portion 34b extending rearward from the lower end portion of the first pipe portion 34a. It has a third pipe portion 34c extending to the right from the rear end of the second pipe portion 34b, and a fourth pipe portion 34d extending to the front from the right end of the third pipe portion 34c.

The front end of the fourth pipe 34d extends to the front of the front wall 30a, and the front end opening of the fourth pipe 34d is a connection port 34e that opens toward the opening 30a1 of the front wall 30a. Therefore, by opening the opening / closing door 30h, the end portion 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 for throwing pellets (conveyed objects) in the flexible container bag 5 into the blower pipe 34, and is fixed to the housing 30 in a state of being arranged on the upper right side of the internal space 30 g. The input port 35a formed at the upper end of the hopper 35 is open at the upper wall 30c of the housing 30. The discharge port 35b formed at the lower end of the hopper 35 is connected to the valve 36.

The valve 36 adjusts the amount of pellets thrown 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 arranged between the fourth pipe portion 34d of the blower pipe 34 and the hopper 35 on the right side of the internal space 30 g. The inlet 36a formed at the upper end of the valve 36 is connected to the discharge port 35b of the hopper 35. The 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 in a state where the opening / closing door 30h of the housing 30 is opened and the connection hose 8 is connected to the connection port 34e of the blower pipe 34. By moving the bag 5 to just above the charging port 35a of the hopper 35, the pellets in the flexible container bag 5 can be charged into the hopper 35. Then, by driving the blower 31 by the motor 32 and controlling the valve 36, the pellets thrown into the hopper 35 are sent out into the blower pipe 34 via the valve 36, and the connection hose 8 is sent together with the conveyed air. It is charged into the silo 3 via the charging hose 9 and the silo loading port device 1.

In FIGS. 14 and 16, the housing 30 further includes a box 37 having a hollow rectangular cross section fixed at two locations on the upper surface of the lower wall 30d at predetermined intervals in the left-right direction. 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 for taking in the air sucked by the blower 31 from the outside into the internal space 30 g of the housing 30.

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

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

A plurality of inner roads 42 (7 in FIG. 17) are formed at predetermined intervals in the longitudinal direction of each of the side walls 37a and 37b. The plurality of inner roads 42 are formed in a circular cross section having the same cross-sectional shape, and are formed so as to penetrate in the thickness direction at each of the side walls 37a and 37b. The side walls 37a and 37b face each other with the outer road 41 in between, and the inner road 42 of the side wall 37a and the inner road 42 of the side wall 37b also face each other with the outer road 41 in between. Each inner road 42 formed on the side wall 37a is formed at a corresponding position of each inner road 42 formed on the side wall 37b, and the center lines Y of the inner roads 42 corresponding to each other coincide with each other. .. That is, the plurality of inner roads 42 formed on the side wall 37a and the plurality of inner roads 42 formed on the side wall 37b have the same positions in the front-rear direction.

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

As described above, the inner road 42 is formed so as to communicate the outer road 41 and the internal space 30 g of the housing 30. As a result, the air outside the housing 30 is taken into the internal space 30g of the housing 30 via the outer air intake port 41a of the outer road 41, the inner air intake port 42a of the inner road 42, and the intake port 42b, and the blower 31 is used. It is sucked from the suction port 31a.

Further, the outer intake port 41a of the outer road 41 is open forward and backward, while the inner intake port 42a of the inner road 42 on both side walls 37a and 37b is open to the right and left, respectively. That is, the outer intake port 41a and the inner intake port 42a are opened in different directions by 90 degrees.

Further, in the housing 30, a total of four outer intake ports 41a are formed in each of the boxes 37 arranged at the two locations, two each (see FIGS. 14 and 16), and the two boxes are formed. A total of 28 inner intake ports 42a are formed in each of 37, 14 (= 7 × 2 side walls). Then, each outer intake port 41a and each inner intake port 42a are formed so that the total opening area of these 28 inner intake ports 42a is equal to or larger than the total opening area of the four outer intake ports 41a. There is.

As shown in FIG. 14, the outer road 41 of each box 37 arranged at two locations in the lower part of the housing 30 is formed so that a pair of forks of a forklift (not shown) are inserted. Specifically, the left-right spacing of the outer road 41 in the two boxes 37 is formed to have the same dimensions as the left-right spacing of the pair of forks. Further, each outer road 41 is formed to have a size into which the fork is inserted.

According to the air transport device 2 of the present embodiment configured as described above, the blower 31 housed in the internal space 30 g of the housing 30 is from the outside of the housing 30 to the outside road 41 and the inside of the intake passage 40. The air taken into the internal space 30 g via the road 42 can be sucked and sent out. At that time, since the outer intake port 41a of the outer road 41 and the inner intake port 42a of the inner road 42 are opened in different directions, the noise of the blower 31 generated in the internal space 30 g causes the inner intake of the inner road 42. It is possible to prevent the mouth 42a from leaking directly to the outside of the housing 30. As a result, when the pellets thrown into the blower pipe 34 from the hopper 35 are conveyed together with the air sucked and sent by the blower 31, the noise of the blower 31 which is an air supply source can be effectively suppressed. ..

Further, each inner road 42 formed on the side wall 37a of the box 37 is formed at a corresponding position of each inner road 42 formed on the side wall 37b, and the center lines Y of the inner roads 42 corresponding to each other are formed. Are in agreement. As a result, the noise of the blower 31 leaking to the outer road 41 through the inner road 42 of the two inner roads 42 corresponding to each other returns to the internal space 30 g through the other inner road 42. Therefore, it is possible to reduce the noise leaking to the outside of the housing 30 from the outer intake port 41a of the outer road 41. As a result, the noise of the blower 31 can be suppressed more effectively.

Further, since the total opening area of the inner intake port 42a in the inner road 42 is equal to or larger than the total opening area of the outer intake port 41a in the outer road 41, the total amount of air taken into the outer road 41 from the outer intake port 41a is used. , It can be taken into the internal space 30g of the housing 30 from the inner intake port 42a of the inner passage 42. As a result, the air taken into the outer passage 41 from the outer intake port 41a can be fully utilized as the air sucked by the blower 31.
Further, the air transport device 2 can be easily carried by inserting a pair of forks of a forklift into the outer roads 41 formed at two places in the lower part of the housing 30.

[others]
The silo inlet device 1 of the above embodiment is retrofitted to the cylinder portion 3a of the silo 3, but for example, when installing both the drop injection method and the air transport method when installing the silo 3, the silo inlet device 1 is retrofitted. The tubular body 11 of the silo inlet device 1 may be integrally formed with the tubular portion 3a of the silo 3. Further, in the above embodiment, the silo inlet device 1 describes the wood pellets as the storage of the silo 3, but the pellets other than the wood, the livestock feed, and the like may be the storage of the silo 3. Further, in the silo inlet device 1 of the above embodiment, the pellet and the transport air are separated by a cyclone (cylinder body 11, separation cylinder 19), but the pellet and the transport air are separated by a separation method other than the cyclone. You may.

The input pipe 13 of the above embodiment is formed so as to extend straight in the lateral direction, but may be formed in an elbow shape. Further, the input pipe 13 is connected to the cylinder 11 in a state of being offset from the center (axis C) of the cylinder 11 in a plan view, but is connected to the cylinder 11 on the center line of the cylinder 11. You may.

The discharge pipe 14 of the above embodiment is composed of a horizontal pipe portion 14a, a bent pipe portion 14b, and a vertical pipe portion 14c, which are separate members, and these pipe portions 14a to 14c are integrally formed. There may be. Further, the discharge pipe 14 may be composed of at least a horizontal pipe portion 14a and a vertical pipe portion 14c.

In the above embodiment, the input pipe 13 and the discharge pipe 14 are provided in the tubular body 11, but at least one of them may be provided in the lid body 12. Further, the discharge pipe 14 of the present embodiment is a pipe for charging the air-conveyed pellets into the silo 3, and the input pipe 13 of the present embodiment discharges the conveyed air introduced into the silo 3 together with the pellets to the outside. It may be a pipe to be installed.

Although the cylindrical body 11 of the above embodiment is formed in a cylindrical shape, it may be formed in a polygonal tubular shape. The lid body 12 of the above embodiment is rotatably supported with respect to the tubular body 11 in order to open and close the first input port 11a, but may be slidably supported in the lateral direction. The support 15 of the above embodiment may have another shape such as a rod shape other than the flat plate member. Further, the support 15 does not necessarily have to be provided.

In the mounting structure of the silo inlet device 1 of the above embodiment, the band 21 is composed of a band main body 21a and a lower flange 21b which are separate members, but the band main body 21a and the lower flange 21b are integrally formed. It may be formed. Further, the mounting structure has described the case where the silo inlet device 1 corresponding to both the drop injection method and the air transfer method is attached to the silo 3, but the silo inlet device 1 corresponding only to the air transfer method. Can also be applied when the silo 3 is attached. In this case, the silo inlet device 1 may be configured such that, for example, the tubular body 11 is formed in a celestial tubular shape and the tubular body 11 is not provided with the lid body 12.

In the above embodiment, the inner peripheral end portion of the lower surface of the upper flange 11b forming the annular space S is composed of 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. It may be configured by at least the inclined surface 11d1 of the inclined portion 11d.
Further, the outer peripheral surface of the seal member 23 is an inner peripheral end portion (inclined surface 11d1 or the like) on the lower surface of the upper flange 11b, an upper end portion 3a1 on the outer peripheral surface of the tubular portion 3a, and an inner peripheral end portion 21b2 on the upper surface of the lower flange 21b. However, it is sufficient that they are pressure-welded to 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 tubular portion 3a.

Although the seal member 23 of the above embodiment is formed to have a circular cross section, it is pressed against at least one place of the inner peripheral end portion of the upper flange 11b and at least one place of the upper end portion 3a1 of the outer peripheral surface of the tubular portion 3a. If it has a tightening allowance, it may have another cross-sectional shape such as a polygonal cross-section.
The fixing means 22 of the above embodiment is composed of a bolt 22a and a 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, as in the case shown in FIG. 11, the upper flange of FIG. 12 is shown. 11b and the lower flange 21b of FIG. 13 may be combined.

Although the air transport device 2 of the above embodiment is mounted on the loading platform 6a of the truck 6, it may be installed at or near the installation location of the silo 3.
In the above embodiment, the blower 31 is used as the air supply source, but another air supply source (compressor or the like) may be used as long as the air is sucked and sent out. Further, at least the air supply source (blower 31) may be accommodated in the internal space 30 g of the housing 30, and the hopper 35, the valve 36, and the like may be arranged outside the housing 30.

In the above embodiment, the outer passage 41 of the intake passage 40 is formed at two places of the housing 30, but may be formed at only one place of the housing 30 or at three or more places. Further, although the outer road 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 road 41 does not have to penetrate the housing 30. Further, the outer road 41 may be formed at a position other than the lower part of the housing 30.

Further, although the outer road 41 is formed in the box 37 having a rectangular cross section, it may be formed in a box having another cross section such as a hollow circular cross section. Further, the outer road 41 may be formed by using a member other than the box 37. For example, the lower wall 30d of the housing 30 and the channel material may be combined to form the outer road 41.

In the above embodiment, among all the inner roads 42 formed on the side wall 37a and the side wall 37b of the box 37, the center lines Y of the inner roads 42 corresponding to each other are aligned with each other, but these center lines Y are aligned with each other. It may not be the same, or only the center lines Y of some of the inner roads 42 corresponding to each other may be the same.
Even when the center lines Y do not coincide with each other, the side wall 37a side of the internal space 30g, the inner road 42 of the side wall 37a, the outer road 41, the inner road 42 of the side wall 37b, and the side wall of the inner space 30g. If the 37b side has a portion that is in a straight line, the noise leaked to the inner road 42 of one of the side wall 37a and the side wall 37b can easily return to the other inner road 42.

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. Further, the inner road 42 is formed on the left and right side walls 37a and 37b of the box 37, but if it is formed on the wall facing the outer road 41, it is formed on the upper and lower walls of the box 37. It may be formed on an inclined wall depending on the shape of the box 37. Further, the number of inner roads 42 is not limited to the above embodiment, and may be formed at at least one place in the box 37. Further, in the present embodiment, the through hole formed in the box 37 is used as the inner passage 42, but the inner passage 42 may be formed by a member other than the box 37. For example, a hollow tubular member may be penetrated and connected to a through hole formed in the box 37, and the hollow portion in the tubular member may be used as an inner path 42.

It should be noted that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims, not the above-mentioned meaning, and is intended to include the meaning equivalent to the scope of claims and all modifications within the scope.

31 Blower (air supply source)
30 Housing 30g Internal space 34 Blower 35 Hopper 40 Intake port 41 Outer path 41a Outer intake port 42 Inner path 42a Inner intake port Y Center line

Claims (4)

An air supply source that sucks and sends out air,
An air transport device comprising an internal space in which the air supply source is housed, and a housing having an intake passage for taking in air sucked by the air supply source from the outside into the internal space.
The intake passage has an outer passage that directly communicates with the outside of the housing and does not directly communicate with the internal space, and an inner passage that communicates the outer passage and the internal space.
The outer intake port that opens to the outside of the housing in the outer road and the inner intake port that opens to the outer road in the inner road are open in different directions from each other.
The outer road is an air transport device formed at two locations in the housing so that a pair of forks of a forklift can be inserted . The inner road has one or more inner air intakes, and the outer road has one or more outer air intakes.
The air transport device according to claim 1 , wherein the total opening area of the inner intake port in the inner road is equal to or larger than the total opening area of the outer intake port in the outer road. The intake passage has at least two said inner passages.
The air transfer device according to claim 1 or 2 , wherein the center lines of at least two inner paths coincide with each other. The housing includes a blower pipe that is connected to the air supply source and blows air sent from the air supply source, and a hopper for throwing a transported object that is conveyed together with the air in the blower pipe into the blower pipe. The air transport device according to any one of claims 1 to 3 , which is attached to the air transport device.

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