JP2020125169A - Air conveying equipment for particles - Google Patents

Abstract

To smoothly, quickly and efficiently convey particles without clogging them by positively sucking air, especially in an air carrying passage, in an air conveying equipment for the particles capable of conveying the particles such as pellets stored in a storage container.SOLUTION: In the air conveying equipment which conveys particles G in a particle container B to a particle storage chamber Ca by the suction force of a blower Bl, an intake pipe 23 opening an intake port 24 communicating with the atmosphere is connected to a suction hose Hcommunicated with the blower Bl, and when the particles G conveyed in the suction hose Hare accumulated in the intake pipe 23 at an angle of relief, the intake port 24 is arranged so that the lower end of the accumulated particles G straddles the position intersecting the bottom surface of the intake pipe 23.SELECTED DRAWING: Figure 3

Description

The present invention relates to an air conveying device for granules, which is adapted to convey granules such as pellets by air, and particularly smoothly and quickly by suction air without clogging the granules stored in a container. It enables efficient transportation.

BACKGROUND ART Conventionally, an air transport device capable of transporting a heterogeneous substance by air is known as disclosed in Patent Document 1 described later.

In the above-mentioned conventionally known one, a transport pipe 7 is communicated with a suction port of a suction type blower 6 via a separator 8 for separating the substance B and air, and the transport pipe 7 is connected to the hopper via a crusher 4. The substance B in the hopper A is crushed, fluidized with air, and transported by air.

Japanese Utility Model Publication No. 52-21581

By the way, in the above-mentioned known device, since the substance B and the air are sucked from the outlet of the crusher 4 which is connected to the transportation pipe 7, the accumulated substance B blocks the outlet of the crusher 4 and the air cannot be sucked. However, there is a problem that it becomes difficult to smoothly transport the mixture of the substance B and air to the transport pipe 7, and the transport cannot be carried out by force, but no measures have been taken against this problem.

The present invention has been made in view of the above point, the suction hose for sucking the particles by the suction force of the blower, by positively inhaling the atmosphere, without clogging the particles in the suction hose, the particles It is an object of the present invention to provide an air transfer device for a new granular material, which can always transfer efficiently, smoothly and quickly.

In order to achieve the above object, the present invention provides a suction hose connected to a discharge port opened in a granular container capable of accommodating granules such as pellets through a vertically extending suction passage, An air transfer device for granules, comprising a suction port of a blower connected, and a discharge port of the blower connected to a fine particle storage chamber such as a silo via a discharge hose,
An intake pipe having an intake port that communicates with the atmosphere is connected to the suction hose below the suction passage, and particles flowing in the suction hose are deposited at an angle of repose in the suction pipe. At this time, the first feature is that the intake port is located so that the lower end of the particle straddles the position intersecting the bottom surface of the intake pipe.

In order to achieve the above object, the present invention has a second feature that in the first aspect, the intake port is opened to a lower surface of the intake pipe.

In order to achieve the above object, in the present invention according to claim 1 or 2, the intake pipe is provided with a shutter capable of opening and closing the intake port and adjusting an opening area thereof. Is the third feature.

In order to achieve the above-mentioned object, the present invention relates to the above-mentioned claim 1, 2 or 3, wherein the intake port opened to the intake pipe is viewed from the intake passage toward the blower in a side view. The fourth characteristic is that the shape is formed in a triangular shape that expands downward in the vertical direction.

In order to achieve the above object, the present invention relates to the above-mentioned claim 1, 2, 3 or 4, wherein an air transfer device for the particles is provided in a vehicle for transferring particles. It is a feature of.

According to the first feature of the present invention, the air sucked into the suction hose through the suction port efficiently fluidizes the granules such as pellets in the suction hose, and smoothes them without retaining them in the suction hose. Can be transferred to.

If the entire intake port is provided on the blower side of the accumulated particles, only the air is sucked into the suction hose and the particles cannot be sucked. Further, if the whole intake port is provided so as to cover the deposited particles, the inside of the suction hose will be blocked by the particles and the intake will be hindered.

According to the second feature of the present invention, since the particles are blown up from the lower side of the suction hose, the particles are easily fluidized.

According to the third aspect of the present invention, the intake pipe is provided with a shutter capable of opening and closing the intake port and adjusting the opening area thereof. Even if the positions of the ends of the granules are different, the position of the intake port can be adjusted so as to straddle the ends.

According to the fourth feature of the present invention, the amount of intake air flowing through the intake pipe can be increased as it gets closer to the intake passage, so that it is easy to fluidize the vicinity of the input passage where particles are easily accumulated.

Overall side view of a dump vehicle equipped with an air transfer device Perspective view of a dump truck when dumping a cargo box Operation system diagram of air carrier 4-4 line enlarged sectional view of FIG. Sectional view taken along line 5-5 of FIG. Sectional view taken along line 6-6 of FIG. Partially cutaway enlarged view taken along arrow 7 of FIG. Enlarged sectional view taken along line 8-8 of FIG. Enlarged sectional view taken along line 9-9 of FIG. Sectional view taken along line 10-10 of FIG. 11 is an exploded perspective view of FIG.

Hereinafter, an embodiment in which the air carrier for granular material of the present invention is applied to a vehicle equipped with a dump box will be described with reference to the accompanying drawings.

FIG. 1 shows an overall side view of a vehicle V provided with an air conveying device for particles according to the present invention.

On the chassis frame 1 of the vehicle V, a lower sub-frame 2 (vehicle body side frame) is mounted over the entire length of the chassis frame 1, and on top of that, there is a front space S and an upper sub-frame 3 ( The packing box side frame) is installed. A packing box B as a granular container is mounted on the upper sub-frame 3 so that it can be dumped rearward. A hinge bracket 5 is fixed to the lower rear end of the luggage box B, and the luggage box B is connected to the hinge bracket 5 via a hinge pin 6. The luggage box B can be dumped rearward around the hinge pin 6.

A conventionally known tilt mechanism having a dump cylinder 8 for dumping the luggage box B backward between the middle portion of the upper subframe 3 in the front-rear direction and the middle portion of the deck frame 4 below the luggage box B in the front-rear direction. Are connected.

In the front space S in front of the luggage box B, a device housing case 50 of the air transfer device A installed on the lower sub-frame 2 is provided, and inside the device housing case 50, dust collection, which will be described later, is performed. The cyclone Cg, the separation cyclone Cs, the blower Bl, the rotary valve Rv, and other air carrying devices are housed.

A discharge port 9 is opened at a lower rear end of a packing box B as a granular container capable of accommodating granular particles G such as wood pellets. When the packing box B is dumped, it is located behind the packing box B. The collected particles G are sucked and discharged to the outside through the discharge port 9.

The granules G in the packing box B are air-transported by an air-transporting device A, which will be described later, and can be stored in a granule storage chamber Ca such as a silo installed on the ground.

Next, with reference to FIG. 3, a schematic system of the air transfer device A will be described.

A first suction hose H ₁ is connected to the discharge port 9 of the cargo box B via a suction passage 12 extending in the vertical direction. The inlet of the separation cyclone Cs is connected to the outlet of the first suction hose H ₁ . In the middle of the first suction hose H ₁ , an intake device Sa, which will be described later, for forcibly sucking air into the hose H ₁ is connected. An outlet of the second suction hose H ₂ is connected to an outlet of the separation cyclone Cs, an inlet of the dust collecting cyclone Cg is connected to an outlet of the _second suction hose H ₂ , and the dust collecting is further performed. A third suction hose H ₃ is connected to the outlet of the cyclone Cg.

The outlet of the separation cyclone Cs is connected to the inlet of the rotary valve Rv, and the outlet of the rotary valve Rv is connected to the inlet of the phase converter 40. The rotary valve Rv is driven by an electric motor M ₁ .

The outlet of the third suction hose H ₃ is connected to the inlet of the blower Bl. A discharge hose Hd is connected to the outlet of the blower Bl. The discharge hose Hd is connected to the granular material storage chamber Ca such as a silo installed on the ground via the phase mixer 40 in the middle thereof.

The hydraulic motor M ₂ that drives the blower Bl is driven by the drive engine E of the vehicle V together with the dump cylinder 8. That is, the hydraulic motor M ₂ is driven via the two-way switching valve V ₂ by the hydraulic pump P driven by the engine E via the transmission T/M and the power takeoff mechanism PTO.

The dump cylinder 8 is driven by the hydraulic pump P via a three-way switching valve V ₃ .

As shown in FIG. 1, a downwardly extending charging path 11 is connected to a discharge port 9 that is opened at the lower rear end of the packing box B, and a flexible suction path 12 is connected to this charging path 11. A first suction hose H ₁ is connected to the suction passage 12. The first suction hose H ₁ has a straight passage 14 connected to the downstream end of the suction passage 12 via a joint 13, and a downstream flexibility connected to the straight passage 14 via a joint 15. The hose 16 is connected, and the downstream flexible hose 16 is connected to the inlet of the separation cyclone Cs.

The first suction hose H ₁ extends along the front-rear direction of the vehicle V, and the straight passage 14 is supported on one side of the upper subframe 3 via a plurality of supporting members 17.

Further, the suction passage 12 connected to the first suction hose H _1, to the first suction hose H _1, intake system Sa for introducing outside air is connected, the suction passage from the intake system Sa Granules (pellets) G can be efficiently fluidized by the air sucked into 12.

Next, referring to FIGS. 7 to 11, the structure of the intake device Sa will be described. In the middle of the intake passage 12 on the upstream side of the first suction hose H ₁ , a cross section is formed via joints 21 and 22. A quadrangular rectangular tube-shaped intake pipe 23 is connected, and the intake pipe 23 is supported by the lower sub-frame 2 via a bracket 19.

FIG. 7 shows a state in which the vehicle V is parked on the horizontal ground and the granules (pellets) G are in the discharge posture. The intake port 24 is opened across As clearly shown in FIGS. 10 and 11, the intake port 24 is a rectangular lower surface intake port 24 ₁ opened on the bottom surface of the intake pipe 23, and is subsequently opened on both side surfaces of the intake pipe 23. It is composed of triangular side inlets 24 ₂ and 24 ₂ .

The slope formed by the angle θ formed by the triangular side inlets 24 ₂ , 24 ₂ and the bottom surface of the intake pipe 23 has an angle of repose θ′ of the conveyed granules (pellets) (from the horizontal line to the granules G). (Angle to the ridgeline of the mountain) is approximately equal to the slope formed (see FIG. 10).

Then, the intake port 24 is configured to straddle the lower end where the particles G form the angle of repose θ′ and accumulate when the vehicle is stopped on the horizontal ground and is in the discharge posture.

In the present embodiment, the intake port 24 straddles the lower end of the repose angle θ′ in the posture in which the cargo box B is tilted (see FIG. 2) as the discharge posture, but the posture in which the cargo box B is lowered (see FIG. 2). 1) may straddle the angle of repose θ′.

A shutter 25 having a concave cross section is fitted in the intake pipe 23 so as to be slidable in the longitudinal direction of the intake pipe 23, straddling the bottom surface of the intake pipe 23 and an intermediate portion of both side surfaces thereof. A long hole 26 for adjusting the position is formed in the shutter 25, and a plurality of bolts and nuts 27 are fixed to the intake pipe 23 through the long hole 26. The bolts and nuts 27 should be loosened. The position of the shutter 25 can be adjusted with. The shutter 25 is provided with an adjusting hole 28 composed of a large number of small holes, and the opening area of the intake port 24 can be adjusted by slidingly adjusting the shutter 25, so that the air flows into the intake pipe 23. The amount is adjusted.

A corner portion on the downstream side of the intake pipe 23 is narrowed by a plurality of plates 29, and the carrier air flowing through the intake pipe 23 is narrowed and accelerated. A cover plate 30 is detachably bolted to the outer end of the intake pipe 23 so that the inside of the intake passage 23 can be cleaned.

As shown in FIGS. 2 and 3, the packing box B is tilted more than the repose angle θ′ of the granules (pellets) G stored therein, and the granules G collected in the rear part of the packing box B are discharged. The first suction hose H ₁ is sucked from the outlet 9.

As shown in FIGS. 4 to 6, the downstream end of the _first suction hose H ₁ is connected to the inlet of the upper part of the separation cyclone Cs, and the second suction hose is connected to the outlet of the upper part of the separation cyclone Cs. The inlet of H ₂ is connected, and the intake air from which the particles and dust have been separated in the separation cyclone Cs is sucked into the _second suction hose H ₂ .

On the other hand, the granules (pellets) G separated from the separated air in the separation cyclone Cs are guided to the rotary valve Rv. The rotation direction of the rotary shaft 35 of the rotary valve Rv is counterclockwise (arrow direction in FIG. 3), and a plurality of blades 36 are radially arranged on the rotary shaft 35 rotated by the electric motor M ₁ (see FIG. 3). ). To the outlet 37 of the rotary valve Rv, a phase mixer 40 for uniformly mixing the granules G with the carrier air is connected.

The second suction hose H ₂ connected to the outlet of the separation cyclone Cs is connected to the inlet of the dust collecting cyclone Cg, and the third suction hose H ₃ is connected to the outlet thereof. The outlet of the third suction hose H ₃ is connected to the inlet of the blower Bl. The carrier air from which the particles G, dust and the like have been removed by the dust collecting cyclone Cg is guided to the blower Bl, and the carrier air is guided from there to the phase mixer 40 via the discharge hose Hd.

The phase mixer 40 is disposed behind the rotary valve Rv and is connected to the outlet of the rotary valve Rv. A discharge hose Hd is connected to the phase mixer 40, the upstream side of the discharge hose Hd is connected to the blower Bl, and the downstream side thereof is connected to a granular material storage chamber Ca such as a silo installed on the ground. ..

Then, the granules G transferred to the phase mixer 40 by the rotation of the rotary valve Rv can be transported to a desired place together with the carrier air, and the granules (pellets) G are discharged to the rotary valve Rv, the phase mixer 40 and the discharger. It does not clog the hose Hd.

As shown in FIGS. 4 to 6, the device housing case 50 provided in front of the luggage box B has an opening rear surface 51 which can be opened and closed by an opening/closing lid 52, and the left side of the device housing case 50 (the vehicle V The phase mixer 40 is fixed on the bottom wall on the left side in the traveling direction of FIG. 1, the rotary valve Rv and the separation cyclone Cs are sequentially fixed thereon, and the right side (vehicle The blower Bl is fixed to the bottom wall on the right side in the traveling direction of V), and the dust collecting cyclone Cg is fixed to one side thereof. A dust collecting box Cb is detachably provided below the dust collecting cyclone Cg, and the dust collecting box Cb can be removed by opening the opening/closing lid 52.

Thus, as shown in FIG. 4, the separation cyclone Cs is arranged on the left side in the device housing casing 50 together with the phase mixer 40 and the rotary valve Rv, that is, on the left side in the traveling direction of the vehicle V, and the dust collection is performed. The cyclone Cg and the blower Bl are arranged on the right side in the device housing case 50, that is, on the right side in the traveling direction of the vehicle V, so that the weight balance of the entire vehicle V is good and the traveling stability of the vehicle V is improved. be able to.

As shown in FIGS. 4 to 6, the first suction hose H ₁ is externally loaded into the device housing casing 50 and connected to the separation cyclone Cs, and the second suction hose H ₂ from the separation cyclone Cs. Is connected to the inside of the dust collecting cyclone Cg through the upper part of the device housing case 50. The third suction hose H ₃ from the dust collecting cyclone Cg passes through the inside of the device housing casing 50, is connected to the discharge hose Hd via the blower Bl. The discharge hose Hd passes through the phase mixer 40, passes through the opening 53 of the device housing case 50, is extended to the outside, and is connected to the particle storage chamber Ca installed on the ground.

As described above, the granules G in the packing box B include the first suction hose H ₁ , the separation cyclone Cs, the second suction hose H ₂ , the dust collecting cyclone Cg, the third suction hose H ₃ , and the blower Bl. Also, it can be conveyed by air through the discharge hose Hd to the granular material storage chamber Ca.

Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment and various embodiments are possible within the scope of the present invention.

The intake port 24 may be provided only on the side surface of the intake pipe 23.

The granules G may be wood pellets or other powder and granules. For example, cement, humus (soybean squeezed powder, used as a biomass fuel), fungal bed (mixed nutrients in sawdust, medium for the population of mushrooms, etc.).

The air transport device for the granules G may be provided in the facility instead of the vehicle V, in which case the granule container is a hopper.

The intake pipe 23 of the intake device Sa is fixed to the upper subframe 3 of the vehicle V, but may be fixed to the luggage box B and tilted together. In this case as well, the intake port 24 is provided so as to straddle the lower end of the accumulated particles G at the angle of repose θ′ of the granules G in the discharge posture (the tilted posture of the cargo box or the lowered posture of the cargo box).

The intake port 24 is provided on the lower surface of the intake pipe 23 having a rectangular tubular shape (the cross-sectional shape is circular or triangular). In this case, the lower surface is a surface including the lower end of the intake pipe 23.

Although the intake port 24 is provided on the lower surface of the intake pipe 23, it may be provided only on the side surface thereof. In this case, the intake port 24 is provided so as to straddle the portion where the granules (pellets) G that have accumulated at a repose angle θ′ and the side wall of the intake pipe 23 intersect.

9... Discharge port 12... Intake passage 23... Intake pipe 24... Intake port 25... Shutter B... Granule container (packing box)
Bl... Blower Ca... Granule storage chamber G... Granules (pellets)
H ₁ ··· Suction hose (first suction hose)
Hd...Discharge hose V... Vehicle θ'... Repose angle (of particles)

Claims (5)

A suction hose (H ₁ ) is connected to a discharge port (9) opened in a granular container (B) capable of accommodating granules such as pellets through a suction passage (12) extending in the vertical direction. A suction port of a blower (Bl) is connected to (H ₁ ) and a discharge port of the blower (Bl) is connected to a fine particle storage chamber (Ca) such as a silo via a discharge hose (Hd). , An air conveying device for granules,
Wherein the suction hose (H ₁₎ is below the said suction passage (12), connected an intake pipe having an open inlet port communicating with atmosphere (24) to (23), said suction hose (H ₁₎ in the When the flowing particles (G) are deposited in the intake pipe (23) at an angle of repose (θ'), the lower ends of the particles (G) intersect the bottom surface of the intake pipe (23). An air conveying device for granules, characterized in that the air inlet (24) is positioned so as to straddle the position. The air transfer device for granules according to claim 1, wherein the intake port (24) is opened at a lower surface of the intake pipe (23). The particle according to claim 1 or 2, wherein the intake pipe (23) is provided with a shutter (25) capable of opening and closing the intake port (24) and adjusting an opening area thereof. Air transport device for body. The intake port (24) opened in the intake pipe (23) is formed in a triangular shape that expands downward in the vertical direction from the intake passage (12) toward the blower (Bl) in a side view. The air conveying device for particles according to claim 1, 2 or 3, characterized in that. The air transport device for particles according to claim 1, 2, 3 or 4, wherein the air transport device for particles is provided in a vehicle (V) for transporting particles.