JP2020075788A - Pneumatic conveyance apparatus - Google Patents

Abstract

To provide a pneumatic conveyance apparatus capable of effectively restraining water from invading into a hopper.SOLUTION: A pneumatic conveyance apparatus 2 includes: an enclosure 30; a hopper 35 having a charge chute 35a which is formed in the enclosure 30 and is opened around a top face of the enclosure 30 for charging pellets; a lid part 40 which can open and close the charge chute 35a and is formed so that an outer edge extends to upward of a peripheral edge part of the charge chute 35a under a closed state of the charge chute 35a; and a barrier part 70 which is disposed at an outer-peripheral part of the charge chute 35a below the lid part 40 and inhibits the water adhering to the top face of the enclosure 30 from moving to the charge chute 35a at the more outer side than the outer edge of the lid part 40.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an air carrying device.

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

JP-A-4-12937

  The present applicant has already proposed an air carrying device that can suppress the noise of the blower more than the conventional air carrying device (Japanese Patent Application No. 2018-014637, hereinafter referred to as "prior invention"). An input port of a hopper into which pellets are input is opened on the upper surface of the casing of the air transfer device of the invention of the prior application.

  When the air transfer device configured as described above is installed outdoors, when the wall surface inside the hopper gets wet with rainwater or the like, the pellets adhere to the wet wall surface, and the pellets are easily clogged in the hopper. In order to prevent such clogging of pellets, it is conceivable to provide a lid for opening and closing the input port of the hopper. However, even if the lid is used to close the opening of the hopper, rainwater or the like that adheres to the upper surface of the housing outside the outer edge of the lid may flow along the upper surface and enter the hopper through the opening.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an air transfer device that can effectively prevent water from entering the hopper.

  (1) The present invention includes a housing, and a hopper provided in the housing and having a loading opening that opens near a top surface of the housing and through which a conveyed product is loaded. An air transport device for transporting a transport object thrown therein with air, wherein the loading port can be opened and closed, and an outer edge is formed to extend above a peripheral portion of the loading port in a state where the loading port is closed. And a lid part disposed below the lid part and arranged at a peripheral portion of the input port, and prevents water attached to the upper surface of the housing outside the outer edge of the lid part from moving to the input port. And a barrier section for controlling the air transfer device.

  According to the present invention, water can be prevented from directly entering the hopper by closing the input port of the hopper with the lid. Further, a barrier portion arranged at the peripheral portion of the input port prevents the water adhering to the upper surface of the casing from moving to the input port outside the outer edge of the lid part that closes the input port of the hopper. You can This can also prevent water adhering to the upper surface of the housing from entering the hopper. Therefore, the lid portion and the barrier portion can effectively prevent water from entering the hopper.

(2) In the casing, a step surface lower than the upper surface is formed in the peripheral portion of the insertion port, the barrier portion projects upward from the step surface, and the step of the barrier portion is formed. The height from the surface is preferably equal to or less than the height from the step surface to the upper surface.
In this case, since the height of the barrier section is equal to or lower than the height from the step surface of the housing to the upper surface, the barrier section does not project from the upper surface of the housing. Thereby, for example, when the flexible container bag containing the transported object is lifted to a position above the loading opening of the hopper and the loaded material in the flexible container bag is loaded into the hopper, the flexible container bag acts as a barrier. It can be prevented from being caught and broken.

  (3) The stepped surface is preferably connected to a side wall of the housing. In this case, the water accumulated on the step surface can be drained to the outside of the housing from the step surface along the side wall of the housing, so that the water accumulated on the step surface exceeds the barrier portion and is stored in the hopper. Can be suppressed from entering the.

  (4) It is preferable that the air transfer device further includes a drainage channel for draining water accumulated on the step surface to the outside of the housing. In this case, it is possible to prevent the water accumulated on the step surface from entering the hopper beyond the barrier portion.

  According to the air carrying device of the present invention, it is possible to effectively prevent water from entering the hopper.

FIG. 3 is a side view showing a silo charging system including the air transfer device according to the first embodiment of the present invention, showing a state in which pellets are charged into the silo by a drop charging method. It is a side view which shows the silo charging system, and has shown the state which is charging the pellet in the silo by the air conveyance method. It is a front view which shows an air conveyance device. It is a top view showing an air carrier. It is a top view which shows the inside of a housing | casing, and has shown the state which removed the upper wall. It is a left side view showing the inside of a case. It is a right view which shows the inside of a housing | casing. It is a top view of a hopper. FIG. 9 is a view on arrow I of FIG. 8. FIG. 9 is a sectional view taken along the line II-II of FIG. 8. FIG. 11 is an enlarged cross-sectional view of part III of FIG. 10 showing a connecting portion between the upper wall of the housing and the upper end of the hopper. It is an expanded sectional view showing a modification of a barrier part. It is an expanded sectional view which shows the other modification of a barrier part. It is an expanded sectional view showing other modification of a barrier. FIG. 9 is an enlarged cross-sectional view showing a connecting portion between an upper wall of a casing and an upper end portion of a hopper in an air transfer device according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
<Silo loading system>
FIG. 1 is a side view showing a silo charging system including a silo charging device 1 and an air transfer device 2 according to a first embodiment of the present invention. In FIG. 1, the silo charging system of the present embodiment is used when charging and storing wood pellets used as a heat source of a heating device (not shown) in a silo 3 installed outdoors in a cold region. ..

  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-shaped frame 4 installed on the ground. At the upper end of the silo 3, a cylindrical portion 3a having an upper end opening is provided. The upper end opening of the cylindrical portion 3a serves as a charging port 3b for dropping and charging the pellet. That is, the silo 3 is installed by adopting a drop charging method as a pellet charging method.

  The lower part of the silo 3 is formed in a conical cylindrical shape, and the lower end of the silo 3 is formed with an openable / closable outlet 3c. As a result, the silo 3 can store the pellets charged therein through the charging port 3b and open the outlet 3c to take out the pellets stored therein to the outside.

  The pellets loaded into the silo 3 are contained in a plurality of flexible container bags 5 in predetermined amounts. The flexible container bag 5 has a container bag body 5a for accommodating pellets and a hooking portion 5b fixed to the container bag body 5a. The container back 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 back body 5a so as to be opened and closed.

  The plurality of flexible container bags 5 are loaded on the bed 6a of the truck 6 and transported to the installation location of the silo 3. The truck 6 is equipped with a crane 7 including a multi-stage boom 7a and a hanging hook 7b provided at the tip of the boom 7a. In the crane 7, the flexible container bag 5 can be lifted by hooking the hook portion 5b of the flexible container bag 5 on the hanging hook 7b. An air transfer device 2 is also mounted on the loading platform 6 a of the truck 6.

<Silo input device>
The silo inlet port device 1 is retrofitted to the upper end of the cylindrical portion 3 a of the silo 3. The silo charging port device 1 is capable of charging pellets into the silo 3 by either of two methods, a drop charging method and an air carrying method. That is, the silo charging port device 1 of the present embodiment can be applied to the existing silo 3 installed by adopting the drop charging method as described above, regardless of whether it is the drop charging method or the air transfer method. The pellets can be put into the silo 3.

  FIG. 1 shows a state in which pellets in a 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, the drop loading method using the silo loading port device 1 is such that a flexible container bag 5 is lifted by a crane 7 of a truck 6 right above the silo loading port device 1 and the flexible container bag 5 is lifted in that state. In this method, the pellets in 5 are dropped into the silo 3 from the outlet 5c through the silo inlet device 1.

  FIG. 2 is a side view showing the silo charging system, showing a state where the pellets in the flexible container bag 5 are charged into the silo 3 by the air transfer method using the silo charging port device 1. .. As shown in FIG. 2, in the air transfer method using the silo inlet device 1, the end portion of the connection hose 8 connected to the blower pipe (not shown) of the air transfer device 2 mounted on the truck 6 is The flexible container bag 5 lifted by the crane 7 of the truck 6 in a state of being connected to the lower end portion 9a of the charging hose 9 extending downward from the silo charging port device 1 along the gantry 4 is provided in the hopper (not shown) of the air transfer device 2. ), The pellets in the flexible container bag 5 are charged into the air transfer device 2 from the discharge port 5c in that state, and the connection hose 8, charging hose 9 and silo charging port device 1 are transferred by air. It is a method of charging into the silo 3 via.

  The carrier air supplied into the silo 3 together with the pellets is forcibly sucked to the outside by the blower B connected to the lower end portion 10a of the discharge hose 10 extending downward from the silo inlet device 1 along the gantry 4. It is supposed to be discharged. The charging hose 9 and the discharging hose 10 are retrofitted to the gantry 4 when the silo loading port device 1 is retrofitted to the silo 3.

In FIG. 1 and FIG. 2, the silo inlet device 1 includes a cylinder body 11, a lid body 12, an inlet pipe 13, and an outlet pipe 14.
The cylindrical body 11 is connected to the upper end of the cylindrical portion 3a of the silo 3, and the upper end opening of the cylindrical body 11 is a first charging port 11a through which pellets can be dropped and charged into the silo 3. The lid 12 opens and closes the first insertion port 11 a, and is rotatably attached to the upper end of the tubular body 11.

  The charging pipe 13 is a pipe for charging the pellets air-transported from the air transportation device 2 into the silo 3, and penetrates the side wall of the cylindrical body 11 and is supported by the side wall. At the outer end of the charging pipe 13, there is formed a second charging port 13a capable of charging air-transferred pellets into the silo 3. The discharge pipe 14 is a pipe for discharging the carrier air, which has been charged into the silo 3 from the charging pipe 13 together with the pellet, to the outside, and penetrates the side wall of the cylindrical body 11 and is supported by the side wall.

<Air carrier>
3 is a front view showing the air carrying device 2, and FIG. 4 is a plan view showing the air carrying device 2. In FIG. 3 and FIG. 4, the air transfer device 2 of the present embodiment is configured by housing the devices 31 to 38 described later in the housing 30. In the present embodiment, the lower side of FIG. 4 is called the “front side” and the upper side of FIG. 4 is called the “rear side”. Further, the right side of FIG. 4 is referred to as “right side”, and the left side of FIG. 4 is referred to as “left side”. Further, the upper side of FIG. 3 is called “upper side”, and the lower side of FIG. 3 is called “lower side”.

The housing 30 is formed in a hollow rectangular shape and has a front wall 301, a rear wall 302, an upper wall 303, a lower wall 304, a right wall 305, and a left wall 306. The front wall 301, the rear wall 302, the right wall 305, and the left wall 306 are side walls of the housing 30, respectively.
On the front wall 301, a large open / close door 307A formed in a U shape and a small open / close door 307B arranged in a recessed portion of the open / close door 307A are rotatably provided. An opening / closing door 308 is rotatably provided on the left wall 306 (see FIG. 2).

  An opening 303c is formed in the upper wall 303, and an upper end portion of a hopper 35, which will be described later, and a lid portion 40 capable of opening and closing a loading port 35a of the hopper 35 are arranged on a peripheral portion of the opening 303c. Therefore, a step surface 303b lower than the main upper surface 303a of the upper wall 303 (upper surface of the housing 30) is formed. Here, the “main upper surface” of the upper wall 303 refers to the flat surface having the largest area among the plurality of flat surfaces having different heights on the upper surface of the upper wall 303. Eye bolts 309 are fixed to the four corners of the upper wall 303.

  FIG. 5 is a plan view showing the inside of the housing 30, and shows a state in which the upper wall 303 is removed. FIG. 6 is a left side view showing the inside of the housing 30. FIG. 7 is a right side view showing the inside of the housing 30. 5 to 7, a blower (air supply source) 31, a motor 32, a control panel 33, a blower pipe 34, a hopper 35, a valve 36, a suction pipe 37, and a silencer 38 are housed inside the housing 30. ing. The hopper 35 is not shown in FIG.

  The blower 31 applies pressure to the sucked air to send it out, and has a suction port 31a for sucking the air and a delivery port 31b for sending out the pressurized air. Since the blower 31 is a vibrating member, in order to lower the center of gravity of the blower 31 and suppress the vibration of the housing 30, the blower 31 is arranged on the lower side of the housing 30 and the height dimension of the blower 31 is kept low. There is. The blower 31 of the present embodiment is arranged on the left rear side in the lower side of the housing 30. The suction port 31a opens upward, and the delivery port 31b opens leftward. The blower 31 is arranged at a position lower than the upper edge of the hopper 35 in the state of being arranged in the housing 30 as described above.

One end of a suction pipe 37 is connected to the suction port 31 a of the blower 31. The suction pipe 37 is arranged in an empty space formed above the blower 31 and behind the hopper 35. A silencer 38 that suppresses noise of the blower 31 is connected to the other end of the suction pipe 37. The silencer 38 is arranged on the upper left side of the housing 30 and on the left front side.
The motor 32 is a drive source that drives the blower 31, and is arranged on the lower right side inside the housing 30.

  The control panel 33 controls each drive of the motor 32 and the valve 36, and is arranged on the left front side in the housing 30. The control panel 33 has a control panel 33a on its front side, and the control panel 33a can be operated by opening the opening / closing door 307B (see FIG. 3) of the front wall 301.

  The blower pipe 34 blows 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 341 whose one end is connected to the outlet 31b of the blower 31, a second pipe portion 342 whose one end is connected to the other end of the first pipe portion 341, and The second pipe portion 342 has a third pipe portion 343 whose one end is connected to the other end and a fourth pipe portion 344 whose one end is connected to the other end of the third pipe portion 343.

  The first pipe portion 341 is made of, for example, a J-shaped metal pipe (see FIG. 5). Specifically, the first pipe portion 341 includes a horizontal short pipe 341a extending leftward from the outlet 31b of the blower 31, a vertical pipe 341b bent upward from the left end of the horizontal short pipe 341a, and a vertical pipe 341b. And a horizontally elongated tube 341c that is bent from the upper end of the and extends rightward.

  The vertical pipe 341b is arranged along the left wall 306 of the housing 30. The vertical pipe 341b is arranged so as to extend obliquely rearward and upward from the lower end so that the upper end is located above the blower 31 and behind the suction pipe 37. As a result, the horizontally long tube 341c is arranged across the blower 31 in the left-right direction in the empty space above the blower 31 and behind the suction tube 37.

  The second pipe portion 342 is made of, for example, an L-shaped metal pipe (see FIG. 5). Specifically, the second pipe portion 342 includes a first horizontal pipe 342a extending rightward from the right end of the horizontal pipe 341c of the first pipe portion 341, and a first horizontal pipe 342a bent from the right end of the first horizontal pipe 342a and extending forward. It is constituted by two horizontal tubes 342b. The second horizontal pipe 342b is arranged along the right wall 305 of the housing 30. Further, the front end portion of the second horizontal pipe 342b is bent so as to extend obliquely forward and downward (see FIG. 7).

  The third pipe portion 343 is composed of, for example, a flexible resin hose (see FIG. 7). One end of the third pipe 343 is connected to the front end of the second horizontal pipe 342b of the second pipe 342, and the other end of the third pipe 343 is connected to the vertical pipe 344a of the fourth pipe 344 (described later). )It is connected to the. The third pipe portion 343 is arranged along the right wall 305 of the housing 30 (see FIG. 5).

  The fourth pipe portion 344 is made of, for example, an L-shaped metal pipe (see FIG. 7). Specifically, the fourth pipe portion 344 includes a vertical pipe 344a extending downward from the other end of the third pipe portion 343, and a horizontal pipe 344b bent from the lower end of the vertical pipe 344a and extending leftward. Has been done. The horizontal pipe 344b is arranged below the valve 36, and the vertical pipe 344a is arranged so as to extend obliquely rearward and upward from the right end of the horizontal pipe 344b.

  The left end portion of the horizontal pipe 344b extends to the front side of the left wall 306 of the housing 30, and the left end opening of the horizontal pipe 344b is a connection port 344c that opens toward the opening / closing door 308 of the left wall 306 ( (See FIG. 6). Therefore, by opening the opening / closing door 308, the end portion of the connection hose 8 can be connected to the connection port 344c of the fourth pipe portion 344 (see also FIG. 2).

  The hopper 35 is for charging the pellets (conveyed items) in the flexible container bag 5 into the blower pipe 34. The hopper 35 is arranged in the upper side of the housing 30 so that pellets can be loaded therein. Further, the height dimension of the hopper 35 is set as high as possible in order to increase the accommodation volume of pellets in the hopper 35. The hopper 35 of the present embodiment is fixed to the housing 30 in a state of being arranged on the upper side in the housing 30 toward the front right side (see FIGS. 6 and 7). The input port 35a formed at the upper end of the hopper 35 is open at an opening 303c (see FIG. 4) of the upper wall 303 of the housing 30. As a result, the input port 35a of the hopper 35 is open near the upper surface of the housing 30. The discharge port 35b formed at the lower end of the hopper 35 is connected to the valve 36. As will be described later, the side wall of the hopper 35 is inclined at an angle of repose or more of the pellet so that the pellet slides down the side wall.

  The valve 36 is for adjusting the amount (conveyance amount) of the pellets fed into the hopper 35 to be fed into the blower pipe 34. The valve 36 of the present embodiment is a rotary valve, and is arranged below the hopper 35 in the lower side of the housing 30. An inlet 36a formed at the upper end of the rotary valve 36 is connected to the discharge port 35b of the hopper 35. The outlet 36b formed at the lower end of the rotary valve 36 is connected to the middle portion of the fourth pipe portion 344 of the blower pipe 34 in the longitudinal direction of the horizontal pipe 344b and communicates with the inside of the horizontal pipe 344b. Therefore, the rotary valve 36 is configured to send out the pellet, the sending amount of which is adjusted, from the outlet 36b into the blower pipe 34.

  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 308 of the housing 30 is opened and the connection hose 8 is connected to the connection port 344c of the blower pipe 34. By moving the bag 5 to just above the charging port 35 a of the hopper 35, the pellets in the flexible container bag 5 can be charged into the hopper 35. Then, the blower 31 is driven by the motor 32, and the rotary valve 36 is controlled, so that the pellets thrown into the hopper 35 are sent into the blower pipe 34 through the rotary valve 36, and the connection hose 8 is supplied together with the carrier air. It can be charged into the silo 3 through the charging hose 9 and the silo charging port device 1.

  Further, since the rotary valve 36 is arranged below the hopper 35 in the housing 30, the blower 31 is arranged at a position laterally displaced from the hopper 35 and suppresses vibration of the housing 30. Therefore, it is arranged in the lower part of the housing 30. As a result, above the blower 31 (on the side of the hopper 35), an empty space for the height from the upper surface of the blower 31 to the upper wall 303 of the housing 30 and the plane integration of the blower 31 is formed. In the present embodiment, since the side wall of the hopper 35 is inclined and extends above the blower 31, the plane area of the empty space is the maximum just above the blower 31 (the plane integration of the blower 31), and It is formed so that it becomes smaller as it approaches the upper wall 303.

  As described above, since the blower 31 and the rotary valve 36, which are vibrating members, are arranged in the lower side of the housing 30, vibration of the housing 30 can be suppressed. In addition, since the horizontally long tube 341c of the first tube portion 341 of the blower pipe 34 is arranged above the blower 31, a part of the blower pipe 34 is arranged in an empty space above the blower 31 in the housing 30. It can be used as a space. Therefore, as compared with the conventional air transfer device, the blower pipe 34 can be arranged in the housing 30 in a space-saving manner, so that the entire device can be made compact while suppressing vibration. In addition, a part of the blower pipe 34 may be disposed in at least a part of the empty space.

Further, since the suction pipe 37 is arranged in the empty space above the blower 31, the entire apparatus can be made more compact. The suction pipe 37 may be arranged in at least a part of the empty space.
In the blower pipe 34, the second pipe portion 342 connected to the blower 31 side and the fourth pipe portion 344 connected to the rotary valve 36 side are the third pipe portion 343 formed of a flexible hose. Connected by. As a result, the blower 31 and the rotary valve 36 vibrate differently from each other, and even if the relative positions of the second pipe portion 342 and the third pipe portion 343 are displaced, the displacement is absorbed by the third pipe portion 343. Therefore, the blower pipe 34 can be prevented from being damaged.

<Internal structure of hopper>
FIG. 8 is a plan view of the hopper 35. FIG. 9 is a view on arrow I of FIG. FIG. 10 is a sectional view taken along the line II-II of FIG. 8 to 10, the hopper 35 includes a front side wall 351, a rear side wall 352, a right side wall 353, and a left side wall 354.
The front side wall 351 is arranged so as to extend straight in the vertical direction. A hole 351a is formed in the lower portion of the front side wall 351, and a closing plate 355 that closes the hole 351a is detachably attached to the outer surface of the front side wall 351 with a bolt or the like.

  The rear side wall 352 has a vertical plate portion 352a extending straight upward from a lower end thereof, and an inclined plate portion 352b extending obliquely upward rearward from an upper end of the vertical plate portion 352a. The inclined plate portion 352b is formed such that the width in the left-right direction gradually increases from the lower end toward the upper end.

  The right side wall 353 has a vertical plate portion 353a extending straight upward from the lower end thereof, and an inclined plate portion 353b extending obliquely upward right from the upper end of the vertical plate portion 352a. The inclined plate portion 353b is formed such that the width in the front-rear direction gradually increases from the lower end toward the upper end.

The left side wall 354 has a vertical plate portion 354a extending straight upward from the lower end thereof, and an inclined plate portion 354b extending obliquely upward leftward from the upper end of the vertical plate portion 354a. The inclined plate portion 353b is formed such that the width in the front-rear direction gradually increases from the lower end toward the upper end.
The inclination angles of the inclined plate portions 352b, 353b, 354b of the rear side wall 352, the right side wall 353, and the left side wall 354 with respect to the horizontal plane are set to the repose angle (35 °) or more of the pellet.

  With the above configuration, the input port 35a is formed at the upper end of the hopper 35 by the upper edge of the front side wall 351 and the upper edges of the inclined plate portions 352b, 353b, 354b. At the lower end of the hopper 35, a discharge port 35b is formed by the lower edge of the front side wall 351 and the lower edges of the vertical plate portions 352a, 353a, 354a. Further, the charging port 35a is formed larger than the discharging port 35b, and the charging port 35a and the discharging port 35b are formed in a square shape in plan view. The pellets introduced into the hopper 35 through the introduction port 35a are guided by the inner surfaces of the side walls 351 to 354 and fall into the rotary valve 36 through the ejection port 35b.

  In FIG. 10, a gasket 50 made of an elastic material is projected on the outer peripheral edge of the lower end of the hopper 35, that is, on the outer peripheral surface of the front side wall 351 and the outer peripheral surfaces of the vertical plate portions 352a, 353a, 354a. .. On the other hand, a flange 362 having an L-shaped cross section is fixed over the entire circumference of the upper surface of the casing 361 of the rotary valve 36 arranged below the hopper 35. The gasket 50 is placed on the flange 362 in a state in which a portion projecting upward thereof is cut into the gasket 50.

  With the above configuration, the hopper 35 is mounted on the upper side of the rotary valve 36 via the gasket 50, and thus is connected to the rotary valve 36 without using fixing means such as bolts. This allows the gasket 50 to seal the connection between the hopper 35 and the rotary valve 36. Further, even if the relative positions of the hopper 35 and the rotary valve 36 are displaced by vibrating the hopper 35 and the rotary valve 36 differently from each other, the displacement can be absorbed by the gasket 50. It is possible to prevent damage.

  The rotary valve 36 has a rotary shaft 363 that rotates around a horizontal axis in the casing 361, and a plurality of blades 364 that are provided on the outer periphery of the rotary shaft 363 so as to project at equal intervals in the circumferential direction. Each blade 364 rotates about the horizontal axis in the casing 361 by rotating the rotating shaft 363 in one direction (clockwise direction in FIG. 10). As a result, in the casing 361, a rotation range in which the blades 364 rotate from top to bottom (a range of 180 ° from the 12 o'clock position to the 6 o'clock position in FIG. 10, hereinafter referred to as the downward rotation range). A partition chamber 365 is formed between adjacent blades 364 for sending out a predetermined amount of pellets in the hopper 35 to the blower pipe 34.

  The rotation drive and rotation stop of the rotation shaft 363 are controlled by the control panel 33. Therefore, by controlling the rotation drive and rotation stop of the rotary shaft 363 by the control board 33, the amount of pellets in the hopper 35 fed into the blower pipe 34 can be adjusted.

  In the hopper 35, a rotation range in which each blade 364 of the rotary valve 36 rotates from bottom to top (a range of 180 ° from the 6 o'clock position to the 12 o'clock position in FIG. 10; hereinafter referred to as an upward rotation range). ), The blow-up prevention plate 60 is arranged. The blow-up prevention plate 60 is inclined downward from the side wall of the hopper 35 toward the inlet 36a of the rotary valve 36. The blow-up prevention plate 60 of the present embodiment is provided on the inner surface of the front side wall 351 so as to extend obliquely rearward and downward from a middle portion in the vertical direction on the inner surface. The lower end (tip) of the blow-up prevention plate 60 is arranged slightly rearward (upward rotation range side) from above the upward rotation range of the rotary valve 36.

  With the above configuration, even if the air in the blower pipe 34 enters between the adjacent blades 364 within the upward rotation range and is lifted up into the hopper 35 from the outlet 36b of the rotary valve 36, the air is still above the upward rotation range. The positioned blow-up prevention plate 60 can prevent the pellets in the hopper 35 from being blown up by air.

  The inclination angle of the blow-up prevention plate 60 with respect to the horizontal plane is set to be equal to or greater than the repose angle of the pellet. In the present embodiment, the angle of repose of the pellet is 35 ° and the inclination angle is set to 40 °. As a result, the pellets placed on the upper surface 60a of the blow-up prevention plate 60 move toward the inlet 36a of the rotary valve 36 while sliding on the upper surface 60a due to the inclination of the blow-up prevention plate 60. It is possible to prevent the pellets from staying on the upper surface of the.

  In FIGS. 8 and 10, a screen 61 is disposed below the hopper 35 to prevent foreign matters larger than the pellets from entering the inlet 36 a of the rotary valve 36. The screen 61 is formed in, for example, a lattice shape so as to allow passage of pellets and inhibit passage of foreign matters. The front edge of the screen 61 is attached to the lower edge of the blow-up prevention plate 60 via a bracket 62 so as to be rotatable about a horizontal axis. As a result, the screen 61 has an intrusion prevention position (a position shown by a solid line in FIG. 10) that prevents foreign matter from entering the rotary valve 36, and an intrusion allowable position that allows foreign matter to enter the rotary valve 36 (in FIG. 10). It is rotatable up and down with respect to the position indicated by the two-dot chain line).

  When the screen 61 is in the intrusion prevention position, the outer peripheral edges (rear edge, left edge, and right edge) excluding the front edge thereof are the inner surfaces of the side walls (rear side wall 352, right side wall 353, and left side wall 354) of the hopper 35. By being in contact with, the blow-up prevention plate 60 is held horizontally below the lower end thereof. The screen 61 is arranged in such a manner that when the screen 61 is arranged horizontally above the lower end of the blow-up prevention plate 60, pellets that move while sliding on the upper surface 60a of the blow-up prevention plate 60 are caught by the screen 61. Therefore, the movement of the pellet may be hindered. Therefore, in the present embodiment, it is possible to prevent the movement of the pellets on the upper surface 60a of the blow-up prevention plate 60 from being obstructed by the screen 61 at the intrusion prevention position.

  When the screen 61 is in the intrusion allowable position, its rotating front edge (rear edge) is brought into contact with the inner surface of the front side wall 351 of the hopper 35, so that the screen 61 is held above the blow-up prevention plate 60. To be done. Accordingly, during maintenance work such as cleaning the inside of the hopper 35, the maintenance work on the lower side of the hopper 35 can be easily performed by rotating the screen 61 upward to the intrusion allowable position.

  10, in the hopper 35, a detection means 63 for detecting whether or not the screen 61 is at the intrusion prevention position is provided. The detection unit 63 of the present embodiment includes a proximity sensor 631 that is a detection unit and a dog 632 that is a detected unit. The proximity sensor 631 is fixed to the lower surface of the blow-up prevention plate 60 via a support member 64 with its detection surface 631a facing rearward.

  The dog 632 is attached to the rotation base end side (front end edge side) of the screen 61 and is configured to rotate together with the screen 61. The dog 632 is arranged at a predetermined position on the screen 61 so that the dog 632 can be detected by the detection surface 631a of the proximity sensor 631 when the screen 61 is at the intrusion prevention position. As a result, the proximity sensor 631 detects whether the screen 61 is at the intrusion prevention position, depending on whether the dog 632 is detected.

  The detection signal of the proximity sensor 631 is output to the control panel 33. The control board 33 controls the drive of the rotary valve 36 based on the detection signal of the proximity sensor 631. Specifically, the control panel 33 drives the rotary valve 36, and when the detection signal from the proximity sensor 631 is no longer input, that is, when the screen 61 moves from the intrusion prevention position to the intrusion permitted position, the rotary valve 33 is operated. The drive of 36 is stopped. As a result, it is possible to prevent maintenance work from being performed while the rotary valve 36 is being driven.

  The proximity sensor 631 is arranged in the dead space S formed below the blow-up prevention plate 60 in the hopper 35. The dead space S is a space surrounded by the blow-up prevention plate 60, the front side wall 351 (including the closing plate 355) of the hopper 35, and the virtual plane K in the figure in the side view of FIG. 10. The virtual surface K passes through the lowermost end of the blow-up prevention plate 60 and is inclined in a direction opposite to the inclination direction of the blow-up prevention plate 60 (obliquely downward in the front direction) with respect to the horizontal plane, and the inclination angle of the pellet is It is a surface set to the same angle as the angle of repose (35 °). That is, the dead space S is a space formed below the blow-up prevention plate 60 even when pellets are accumulated in the hopper 35.

  In this way, the proximity sensor 631 of the detection means 63 is arranged in the dead space S formed below the blow-up prevention plate 60, so that the loading capacity of the pellets loaded into the hopper 35 is not reduced and the hopper is not. Proximity sensor 631 may be located within 35.

<Barrier part>
FIG. 11 is an enlarged cross-sectional view of section III of FIG. 10 showing a connecting portion between the upper wall 303 of the housing 30 and the upper end of the hopper 35. 10 and 11, the upper wall 303 of the housing 30 has a step vertical plate portion 303d and a step horizontal plate portion 303e for forming the step surface 303b on the peripheral edge of the opening 303c, The upper surface of the step horizontal plate portion 303e is a step surface 303b. A gasket 51 made of an elastic material is fixed to the step surface 303b.

  On the upper ends of the side walls 351 to 354 of the hopper 35, a mounting plate portion 356 is integrally formed that extends outward in the horizontal direction and on which the lid portion 40 is mounted. The mounting plate portion 356 has a function of sealing the peripheral portion of the input port 35a by mounting the packing 41 made of an elastic material fixed to the back surface of the lid portion 40 on the upper surface thereof. The lid 40 is detachably mounted on the mounting plate 356 so that it can be separated from the hopper 35.

  A vertical plate portion 357 extending downward and a horizontal plate portion 358 extending outward in the horizontal direction from the lower end portion of the vertical plate portion 357 are integrally formed at the horizontal outer end portion of the placing plate portion 356 of the hopper 35. ing. The horizontal plate portion 358 is fixed to the step horizontal plate portion 303e by a bolt or the like (not shown) while being placed on the gasket 51 at the step surface 303b of the upper wall 303. The outer edge of the lid 40 is formed to extend outward (rear side) from the lateral plate 358 at the peripheral edge of the inlet 35a in the state where the lid 40 closes the inlet 35a.

  With the above configuration, water such as rainwater attached to the main upper surface 303a of the upper wall 303 travels from the main upper surface 303a to the side surface of the step vertical plate portion 303d and the step surface 303b of the step horizontal plate portion 303e, and then to the hopper 35. Even if it moves to the side, the outer surface 51a of the gasket 51, the outer surface 358a of the horizontal plate portion 358, and the outer surface 357a of the vertical plate portion 357 prevent water on the step surface 303b from moving to the charging port 35a. can do.

  Therefore, in the present embodiment, the outer surface 51a of the gasket 51, the outer surface 358a of the horizontal plate portion 358, and the outer surface 357a of the vertical plate portion 357, which are arranged below the lid portion 40 at the peripheral edge portion of the insertion port 35a, , Functions as a barrier section 70 that prevents water attached to the main upper surface 303a of the upper wall 303 from moving to the input port 35a of the hopper 35. The barrier section 70 of the present embodiment projects upward from the step surface 303b, and the height h1 of the barrier section 70 from the step surface 303b is set to be less than or equal to the height h2 from the step surface 303b to the main upper surface 303a. There is.

  The step surface 303b of the present embodiment is formed so that water does not collect on the step surface 303b. Specifically, as shown in FIG. 10, a step vertical plate part 303d extending upward is not formed at the front end of the step horizontal plate part 303e formed in front of the opening 303c. The front end of 303e is bent downward and connected to the upper end of the front wall 301 (see also FIGS. 3 and 4). As a result, the water on the step surface 303b in the front, rear, right, and left of the opening 303c is separated from the step surface 303b formed in front of the opening 303c as indicated by the white arrow in the figure. Is transmitted to the outside of the housing 30 through the outer surface of the front wall 301.

  As described above, in the present embodiment, it is possible to suppress water from directly entering the hopper 35 by closing the input port 35a of the hopper 35 with the lid portion 40. In addition, the water adhering to the upper surface (main upper surface of the upper wall 303) 303a of the housing 30 outside the outer edge of the lid 40 that closes the input port 35a of the hopper 35 moves to the input port 35a. It can be blocked by the barrier portion 70 arranged at the peripheral portion of the portion 35a. As a result, it is possible to prevent water adhering to the main upper surface 303a of the upper wall 303 from entering the hopper 35. Therefore, the lid portion 40 and the barrier portion 70 can effectively prevent water from entering the hopper 35.

  Further, since the height h1 of the barrier portion 70 is less than or equal to the height h2 from the step surface 303b of the housing 30 to the main upper surface 303a, the barrier portion 70 does not protrude from the main upper surface 303a of the housing 30. As a result, as shown in FIG. 2, when the pellets in the flexible container bag 5 are loaded into the hopper 35 with the flexible container bag 5 being lifted up to the position above the loading port 35a of the hopper 35, It is possible to prevent 5 from being caught by the barrier portion 70 and being torn.

  Further, since the step surface 303b of the housing 30 is connected to the front wall 301 (side wall) of the housing 30, the water accumulated on the step surface 303b travels from the step surface 303b through the front wall 301 to the housing. It can be drained to the outside of 30. As a result, it is possible to prevent the water accumulated on the step surface 303b from entering the hopper 35 beyond the barrier portion 70.

<Modification of barrier section>
FIG. 12 is an enlarged cross-sectional view showing a modified example of the barrier section 70. In FIG. 12, in the present modification, the upper wall 303 of the housing 30 further has a vertical plate portion 303f that extends upward from the inner end portion of the step horizontal plate portion 303e at the peripheral edge of the opening 303c. A gasket 52 made of an elastic material is fixed to the upper side of the outer side surface of the vertical plate portion 303f.

  At the upper ends of the side walls 351 to 354 of the hopper 35, a mounting plate portion 356 that extends horizontally outward and on which the lid portion 40 is mounted, and a horizontal direction outer end portion of the mounting plate portion 356 extend downward. It has a vertical plate portion 357. The vertical plate portion 357 of the hopper 35 is placed on the upper end surface of the vertical plate portion 303f of the upper wall 303, and the inner surface contacts the gasket 52. It is fixed to 303f.

  With the above configuration, water such as rainwater attached to the main upper surface 303a of the upper wall 303 travels from the main upper surface 303a to the side surface of the step vertical plate portion 303d and the step surface 303b of the step horizontal plate portion 303e, and then to the hopper 35. Even if moved to the side, due to the outer surface 357a of the vertical plate portion 357 on the hopper 35 side and the outer surface 303g of the vertical plate portion 303f on the upper wall 303 side that is exposed below the outer surface 357a, It is possible to prevent the water on the step surface 303b from moving to the input port 35a of the hopper 35. Therefore, in this modification, the outer surface 303g of the vertical plate portion 303f on the upper wall 303 side and the outer surface of the vertical plate portion 357 on the hopper 35 side, which are arranged below the lid portion 40 at the peripheral edge portion of the input port 35a. The 357a functions as a barrier section 70 that prevents water attached to the main upper surface 303a of the upper wall 303 from moving to the inlet 35a. Therefore, also in the present modified example, the same operational effect as that of the first embodiment is achieved.

  FIG. 13 is an enlarged cross-sectional view showing another modified example of the barrier section 70. 13, in this modification, nothing is formed on the upper ends of the side walls 351 to 354 of the hopper 35. The upper wall 303 of the housing 30 has a mounting plate portion 303h, which extends horizontally inward from the vertical plate portion 303f and on which the lid portion 40 is mounted, and a mounting plate portion 303h. It further has a connecting plate portion 303i that abuts from the inner end portion to the upper end portions of the inner surfaces of the side walls 351 to 354 of the hopper 35. The connection plate portion 303i is fixed to the side walls 351 to 354 with bolts or the like.

  With the above configuration, water such as rainwater attached to the main upper surface 303a of the upper wall 303 travels from the main upper surface 303a to the side surface of the step vertical plate portion 303d and the step surface 303b of the step horizontal plate portion 303e, and then to the hopper 35. Even if it moves to the side, the outer surface 303g of the vertical plate portion 303f can prevent the water on the step surface 303b from moving to the input port 35a of the hopper 35. Therefore, in the present modification, the outer surface 303g of the vertical plate portion 303f, which is arranged below the lid portion 40 at the peripheral portion of the charging port 35a, has water attached to the main upper surface 303a of the upper wall 303 to the charging port 35a. It functions as a barrier 70 that prevents movement. Therefore, also in the present modified example, the same operational effect as that of the first embodiment is achieved.

  FIG. 14 is an enlarged cross-sectional view showing still another modification of the barrier section 70. 14, in the present modification, a step surface 303j higher than the main upper surface 303a is formed on the peripheral edge of the opening 303c in the upper wall 303 of the housing 30. Specifically, the upper wall 303 of the housing 30 has a step vertical plate portion 303k and a step horizontal plate portion 303m for forming the step surface 303j on the peripheral edge of the opening 303c. The upper surface of the plate portion 303m is a step surface 303j.

  At the upper ends of the side walls 351 to 354 of the hopper 35, only a mounting plate portion 356 that extends horizontally outward and on which the lid portion 40 is mounted is integrally formed. The mounting portion 356 of the hopper 35 is fixed to the step horizontal plate portion 303m with bolts or the like while being mounted on the step surface 303j of the housing 30.

  With the above structure, even if water such as rainwater attached to the main upper surface 303a of the upper wall 303 moves to the hopper 35 side along the main upper surface 303a, the outer surface 303n of the step vertical plate portion 303k causes the main upper surface 303a. It is possible to prevent the upper water from moving to the input port 35a of the hopper 35. Therefore, in the present modification, the outer surface 303n of the step vertical plate portion 303k, which is arranged below the lid portion 40 at the peripheral portion of the charging port 35a, has the water attached to the main upper surface 303a of the upper wall 303 as the charging port 35a. It functions as a barrier 70 that prevents the movement to the. Therefore, in this modification, similarly to the first embodiment, it is possible to effectively prevent water from entering the hopper 35 by the lid 40 and the barrier 70.

[Second Embodiment]
FIG. 15 is an enlarged cross-sectional view showing a connecting portion between the upper wall 303 of the housing 30 and the upper end of the hopper 35 in the air transfer device 2 according to the second embodiment of the present invention. In FIG. 15, on the upper wall 303 of the housing 30 of the present embodiment, although not shown, a step vertical plate portion 303d for forming a step surface 303j is formed over the entire periphery of the opening 303c. Water is collected on the step surface 303j. Therefore, the air transfer device 2 of the present embodiment includes the drainage channel 80 for draining the water accumulated on the step surface 303j of the upper wall 303 to the outside of the housing 30.

The drainage channel 80 includes, for example, a water inlet 81 provided on the step horizontal plate portion 303e, a water outlet 82 provided on the rear wall 302 of the housing 30, a water outlet 81, and a water outlet 82. It is composed of a connecting pipe portion 83 to be connected.
The water inlet 81 is formed in a cup shape, and is fixed to the step horizontal plate portion 303e by penetrating the step horizontal plate portion 303e in the vertical direction so that the step surface 303b opens behind the gasket 51. There is.

  The drain port portion 82 is formed in a cup shape like the water receiving port portion 81, and penetrates the rear wall 302 in the front-rear direction so as to open on the outer surface of the rear wall 302 below the water receiving port portion 81. It is fixed to the rear wall 302. One end of the connecting pipe portion 83 is connected to the bottom portion of the water receiving port portion 81, and the other end of the connecting pipe portion 83 is connected to the bottom portion of the drain port portion 82.

  As a result, the water receiving port 81 and the drain port 82 communicate with each other via the connecting pipe 83. Therefore, the water accumulated on the step surface 303j of the upper wall 303 passes through the water receiving portion 81, the connecting pipe portion 83, and the drainage portion 82 in order and is drained to the outside of the housing 30. The other configuration of the present embodiment is the same as that of the first embodiment, and thus the description is omitted.

  As described above, according to the air transfer device 2 of the present embodiment, similarly to the first embodiment, it is possible to effectively prevent water from entering the hopper 35 by the lid 40 and the barrier 70. Further, since the water accumulated on the step surface 303b can be drained to the outside of the housing 30 by the drainage channel 80, the water accumulated on the step surface 303b exceeds the barrier portion 70 and enters the hopper 35 from the charging port 35a. Can be suppressed.

[Other]
Although the air carrier device 2 of the above-described embodiment uses the wooden pellets as the transported object, pellets other than the wooden pellets or livestock feed may be used as the transported object. Further, although the air carrying device 2 is mounted on the loading platform 6a of the truck 6, it may be installed in the place where the silo 3 is installed or in the vicinity of the silo 3 outdoors.

  Although the blower 31 is used as the air supply source in the above embodiment, another air supply source (compressor or the like) may be used as long as it sucks and delivers air. Further, the valve 36 is not limited to a rotary valve, and may be, for example, a valve that is opened and closed to adjust the delivery amount of the conveyed product.

  In the above embodiment, the horizontally long pipe 341c of the first pipe portion 341 of the blower pipe 34 is arranged above the blower 31, but the connection between the blower 31 (the outlet 31b) and the valve 36 (the outlet 36b). A part other than the horizontally long pipe 341c (for example, the first horizontal pipe 342a of the second pipe portion 342) may be arranged above the blower 31 as long as it is a part up to the connecting portion.

  In the above embodiment, the third pipe portion 343 of the blower pipe 34 is a flexible hose, but the connection portion of the blower pipe 34 with the blower 31 (the outlet 31b) and the valve 36 (the outlet 36b). A portion other than the third pipe portion 343 (for example, the horizontally long pipe 341c of the first pipe portion 341) may be a flexible hose as long as it is a part between the hose and the connection portion.

  In the above embodiment, the blow-up prevention plate 60 in the hopper 35 is arranged to be inclined, but it may be arranged horizontally. Further, the blow-up prevention plate 60 is provided on the front side wall 351 of the hopper 35 so as to project, but if it is arranged above the upward rotation range of the valve 36, the other side wall of the hopper 35 (the right side wall 353 or the left side wall 353). It may be attached to the wall 354) or may be attached to any two or more of the side walls 351, 353 and 354.

  In the above-described embodiment, the screen 61 in the hopper 35 is formed in a lattice shape, but if it is possible to block the passage of foreign matter larger than the conveyed object while allowing the passage of the conveyed object (pellet), It may be formed in another shape such as a mesh shape. Although the screen 61 is provided on the blow-up prevention plate 60 on the hopper 35 side, it may be provided on the hopper 35 itself.

  The screen 61 is provided rotatably with respect to the hopper side in order to allow foreign matter to enter, but it may be provided movably with respect to the hopper 35 side by sliding or rotating. However, it may be detachably provided on the hopper 35 side. Further, the screen 61 is arranged immediately below the lower end of the blow-up prevention plate 60 when in the intrusion prevention position, but is arranged below the lower ends of the inclined plate portions 352b, 353b, 354b of the hopper 35. May be.

  In the above embodiment, the proximity sensor 631 is used as the detection unit of the detection unit 63, but another detection unit such as a limit switch may be used. The detection unit of the detection unit 63 detects the detected portion (dog 632) when the screen 61 is at the intrusion prevention position, but detects the detected portion when the screen 61 is not at the intrusion prevention position. May be. Further, although the dog 632 which is separate from the screen is used as the detected portion of the detection means 63, the screen itself may be used as the detected portion.

  Further, although the detection unit (proximity sensor 631) of the detection unit 63 is provided on the hopper 35 side and the detected unit (dog 632) of the detection unit 63 is provided on the screen 61 side, the detection unit is provided on the screen 61 side, The detected portion may be provided on the hopper 35 side. Although only the detection unit of the detection unit 63 is arranged in the dead space S below the blow-up prevention plate 60, both the detection unit and the detected unit of the detection unit 63 may be arranged. You may arrange | position only a to-be-detected part. Further, although the detection means 63 is used for the control of stopping the driving of the valve 36, it may be used for other control such as sounding an alarm sound.

  In the above-described embodiment, the lid portion 40 that opens and closes the input port 35a of the hopper 35 is placed on the housing 30 or the hopper 35 in a separable manner. It may be connected via a hinge mechanism. Further, the modified examples (FIGS. 12 to 14) of the barrier section 70 in the first embodiment may be applied to the barrier section 70 in the second embodiment.

Although the step surface 303b of the housing 30 in the first embodiment is connected to the front wall 301, it may be connected to the rear wall 302, the right wall 305, or the left wall 306.
The drainage port portion 82 of the drainage channel 80 in the second embodiment is provided on the rear wall 302, but may be provided on the front wall 301, the lower wall 304, the right wall 305, or the left wall 306. Further, the drainage channel 80 is composed of the water receiving port 81, the drainage port 82, and the connecting pipe 83, but is not limited to this configuration. For example, the drainage channel 80 may be composed of only a pipe member.

  The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above meaning but by the scope of the claims, and is intended to include the meaning equivalent to the scope of the claims and all modifications within the scope.

2 Air Transport Device 30 Housing 35 Hopper 35a Input Port 40 Lid 70 Barrier 80 Drain 301 Front Wall (side wall of the housing)
303a Main upper surface (upper surface of housing)
303b Step surface h1 Height of barrier section h2 Height of top surface of housing

Claims (4)

Housing and
A hopper that is provided in the housing and has an input port that is opened near an upper surface of the housing and into which a conveyed product is input;
An air transfer device for transferring a transferred object, which has been input into the hopper from the input port, together with air,
A lid part that is capable of opening and closing the charging port, and an outer edge extending to a position above a peripheral portion of the charging port while the charging port is closed,
A barrier portion disposed below the lid portion at a peripheral edge portion of the input port, which blocks water attached to the upper surface of the housing outside the outer edge of the lid portion from moving to the input port; Air transport device equipped. In the casing, a step surface lower than the upper surface is formed in the peripheral portion of the input port,
The barrier portion projects upward from the step surface,
The air transfer device according to claim 1, wherein the height of the barrier portion from the step surface is not more than the height from the step surface to the upper surface.   The air transfer device according to claim 2, wherein the step surface is connected to a side wall of the housing.   The air conveyance device according to claim 2, further comprising a drainage channel that drains water accumulated on the step surface to the outside of the housing.

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