JP6839598B2 - Air separation deceleration system - Google Patents

Description

The present invention relates to an air separation deceleration system. The air separation / deceleration system uses an air separation device of an air suction type transporter that generates an air flow by sucking air in a transport path and transports the transported object by the air flow.

As an example of an air suction type carrier, an air transport path, a transported object recovery unit as an air separation device for connecting the opening end on the primary side to the opening end on the secondary side of the air transfer path, and an air separation device. Among them, those provided with a suction mechanism connected to the air exhaust port side are known (Patent Document 1). The primary side is the side where air and the transported object enter, and the secondary side is the side where the air and the transported object exit.

The air separation device in Patent Document 1 includes a recovery guide for connecting the opening end on the primary side to the opening end on the secondary side of the air transport path, a large-capacity receiving hopper for accommodating the recovery guide, and a receiving hopper. It includes an outflow prevention filter that divides the internal space up and down on the upper side of the recovery guide, and a rotary valve that connects to the lower end side of the receiving hopper.

Japanese Unexamined Patent Publication No. 2006-232546

The main purpose of the air separation device is to separate the transported object from the air, but the air separation device disclosed in Patent Document 1 mainly aims to separate the transported object from the air, and then the transported object. Damage prevention (= deceleration of transported objects) is as important as the main purpose. Therefore, the air separation device disclosed in Patent Document 1 adopts a configuration in which the recovery guide is curved in an arc shape from the horizontal direction downward and the inner peripheral surface portion of the arc-shaped recovery guide is mainly opened downward. Therefore, in order to prevent damage to the transported items, the collection guide had to be enlarged. Moreover, since the outflow prevention filter is placed on the upper side separately from the recovery guide, the capacity of the receiving hopper had to be many times larger than that of the recovery guide. Since such a large capacity, that is, a large receiving hopper occupies a large space, there are many restrictions on installation.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to make the air separation device for separating a transported object and air as small as possible and to make it easy to install.

The first air separation / reduction system of the present invention includes an air separation device, a second reduction line connected to an opening end on the secondary side of the inner cylinder of the air separation device, and a primary side of the inner cylinder of the air separation device. It is provided with a first reduction line connected to the open end.
The air separation device consists of an inner cylinder, an outer cylinder that surrounds the inner cylinder at intervals on the outer side in the radial direction, and a pair that closes between the outer cylinder and the inner cylinder in the radial direction on both sides in the length direction of the outer cylinder. It is provided with a closed portion and an exhaust cylinder that branches from the intermediate portion in the length direction of the outer cylinder and connects to the suction device side.
The inner cylinder is provided with a plurality of air holes serving as air outlets on the side surface thereof, with the opening end on the primary side serving as an inlet for the transported object and air, and the opening end on the secondary side serving as an exhaust port for the transported object. At the same time, the internal space is made into a passing space through which the conveyed object passes by inertia.
Then, the second reduction pipe extends in the direction of bending with respect to the length direction of the first curved pipe and the first bent pipe extending in the direction of bending with respect to the length direction of the inner cylinder. Ru and a second curved line.
The inner diameter of the primary side of the opening end of the first curved conduit, Ru der larger than the inner diameter of the secondary side of the open end of the inner cylinder in order to decelerate the conveyed object.
The opening ends on the primary and secondary sides of the air separation device are provided with inner flange portions that project outward in the radial direction, and each inner flange portion also functions as a closing portion of the air separation device.

Further, the second air separation / deceleration system of the present invention is premised on the first air separation / deceleration system, and includes a first reduction line connected to the opening end on the primary side of the inner cylinder of the air separation device. Is. The primary side portion of the second reduction pipe, the first reduction pipe, and the inner cylinder of the air separation device have the secondary side lowered with respect to the primary side and are inclined with respect to the horizontal direction. Is. The inclination angle is larger than the rest angle of the transported object, and is an angle of 30 ° or more and less than 90 ° with respect to the horizontal direction.

Further, in the third air separation deceleration system of the present invention, as compared with the second air separation deceleration system, the identification of the first curved pipeline and the identification of the second curved pipeline in the second deceleration pipeline are both. It differs in that it does not.
That is, the third air separation / reduction system of the present invention includes the above-mentioned air separation device, the first reduction line connected to the opening end on the primary side of the inner cylinder of the air separation device, and the inner cylinder of the air separation device. It is provided with a second reduction line connected to the opening end on the next side. And the air separation device is the same as the air separation device of the first air separation reduction system. Further, the primary side portion of the second reduction pipe, the first reduction pipe, and the inner cylinder of the air separation device are the first reduction pipe in the second air separation reduction system, the inner cylinder of the air separation device, and the second reduction pipe. Same as the primary side of the road.

According to the air separation device of the air separation / deceleration system of the present invention, the air among the conveyed object and the air that has entered the inner cylinder is discharged from the exhaust port on the side surface of the inner cylinder to the space between the inner cylinder and the outer cylinder. The cylinders are sequentially moved toward the suction device. On the other hand, the transported object decelerates because air is sucked from the side surface of the inner cylinder, and passes through the internal space of the inner cylinder with the decelerated momentum (inertia). Since the air separation device of the present invention has such a configuration, even if the inner diameter (capacity) of the outer cylinder is reduced and the distance between the outer cylinder and the inner cylinder in the radial direction is narrowed, the air and the conveyed object are separated. It is suitable for miniaturization and easy to install. Also, since the exhaust stack is branched from the middle part in the length direction of the outer cylinder, for example, when the outer cylinder is installed horizontally, the direction of the exhaust stack can be viewed from the length direction (penetration direction) of the outer cylinder. Since it can be installed 360 degrees in a desired direction, it is easy to install a pipe connected to the exhaust stack.

Further, in the case of the first air separation / deceleration system of the present invention, the conveyed object can be decelerated by providing a plurality of curved pipelines such as the first and second curved pipelines, so that only the air separation device can be used. The air separation device can be miniaturized as compared with the case where the conveyed object is decelerated to a desired speed.
Further, if the inner diameter of the opening end on the primary side of the first bent pipe is larger than the inner diameter of the opening end on the secondary side of the inner cylinder, it will be the inner diameter of the opening end on the primary side of the first bent pipe. Compared with the case where the inner diameter of the opening end on the secondary side of the inner cylinder is the same, the transported object can be effectively decelerated, and the air separation device can be miniaturized.

Further, in the case of the second and third air separation / deceleration systems of the present invention, even if an unexpected situation such as a stop of the suction device occurs, the first reduction line, the inner cylinder of the air separation device, and the second reduction line Regarding the primary side part, since the secondary side is lower than the primary side, the transported object naturally falls easily, and in particular, the inclination angle in the penetration direction is steeper than the rest angle, so that the transported object is Since it inevitably falls, it becomes difficult for the conveyed material to collect in the inner cylinder of the first reduction pipe, the inner cylinder of the air separation device, and the primary side portion of the second reduction pipe.

It is an overall view which shows the air suction type conveyor of 1st Embodiment. It is sectional drawing seen from the front direction which shows the air separation deceleration system of the air suction type conveyor of 1st Embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a top view of the air separation deceleration system of the air suction type conveyor of 1st Embodiment. It is a side view which shows the 2nd reduction pipe of the air separation deceleration system in the air suction type conveyor of 1st Embodiment. It is an overall view which shows the air suction type conveyor of the 2nd Embodiment. It is sectional drawing seen from the front direction which shows the air separation deceleration system of the air suction type conveyor of the 2nd Embodiment.

As shown in FIG. 1, the air suction type transporter of the first embodiment to which the present invention is applied passes through a hopper 1 for loading a transported object, a transport line 2 for passing the transported object together with air, and a transport line 2. A collection tank 3 for storing the transported material, an exhaust pipe 4 for exhausting air from the intermediate portion of the transport pipeline 2 in a direction different from the length direction of the transport pipeline 2, and a collection connected to the intermediate portion of the exhaust pipe 4. A dust device 5 and a suction device 6 connected to the end of the exhaust pipe 4 are provided. The middle part is a part other than both ends in the length direction of the object, and is not limited to the meaning of being exactly in the middle of both ends.

The hopper 1 is a funnel-shaped container whose inner diameter decreases downward, and the upper opening end is an inlet and the lower opening end is an outlet.

The dust collector 5 separates fine particles (dust) smaller than the transported object from the air, stores the separated fine particles in a dust tank (reference numeral omitted), and causes the suction device 6 to suck the air from which the fine particles have been removed. .. The outlet of the dust tank is closed when the transported object is sucked, and is opened as necessary to discharge the dust.

The suction device 6 is, for example, a blower in which the air suction side is connected to the exhaust pipe 4 and the exhaust side is open to the outside air.

The transport pipeline 2 includes a shutter device 11 that connects the opening end on the primary side to the outlet of the hopper 1, and a transport pipeline main body 12 that connects the opening end on the primary side to the opening end on the secondary side of the shutter device 11. The air separation / deceleration system 13 that connects the primary side opening end to the secondary side opening end of the transport pipeline main body 12, the secondary side opening end of the air separation / deceleration system 13 that discharges the transported material, and the storage tank. A rotary valve 14 connected to the inlet of 3 is provided. For the connection, for example, in the present embodiment, joining of the flange portions described later is used, but other joining may be used as long as the airtightness of the connecting portion is maintained.

The shutter device 11 includes a Y-shaped branch pipe 11a and an adjustment operation member 11p that is guided so as to be reciprocally movable in the length direction with respect to the branch pipe 11c of the branch pipe 11a.

The branch pipe 11a includes a main pipe 11b through which a transported object is passed, and a branch pipe 11c that branches from an intermediate portion in the length direction of the main pipe 11b and takes in air. The branch pipe 11a can be said to be a merging pipe in which the branch pipe 11c joins the main pipe 11b. The main pipe 11b connects the opening end on the primary side to the outlet of the hopper 1 and connects the opening end on the secondary side to the opening end on the primary side of the transport line main body 12. The branch pipe 11c can also be said to be a pipe for accommodating a part of the adjustment operation member 11p (outside air introduction pipe 11q described later), that is, an outside air introduction portion accommodating pipe.

The adjustment operation member 11p is an outside air introduction pipe 11q housed in a state of being in contact with the inside of the branch pipe 11c, and is guided to reciprocate in the length direction of the branch pipe 11c, and at one end in the length direction of the main pipe 11b. An outside air introduction pipe 11q that can open and close the inside, a plate-shaped closing portion 11r that closes the outside air introduction pipe 11q at the other end in the length direction thereof, and an adjustment knob 11s that projects from the closing portion 11r to the outside of the outside air introduction pipe 11q. And.

An intake port (not shown) is formed on the side surface of the outside air introduction pipe 11q, and the side surface of the outside air introduction pipe 11q is covered with a branch pipe 11c from the outside in the radial direction so as to conceal the intake port. However, the branch pipe 11c does not cover the entire intake port, but is a part thereof.
More specifically, when the outside air introduction pipe 11q is deeply inserted into the branch pipe 11c, the outside air introduction pipe 11q collides with the inner surface of the main pipe 11b, and the internal space of the main pipe 11b is isolated on the primary side and the secondary side. , The shutter device 11 is fully closed. At this time, most of the intake port is covered with the outside air introduction pipe 11q, but a part of the intake port is not covered with the outside air introduction pipe 11q and is connected to the outside air. Further, the outside air is taken into the transport pipeline main body 12 from the intake port through the inside of the branch pipe 11c and the secondary side portion of the internal space of the main pipe 11b. Then, by operating the adjustment operation member 11p to change the position of the reciprocating outside air introduction pipe 11q with respect to the branch pipe 11c, the outside air introduction pipe 11q is separated from the inner surface of the main pipe 11b according to the operation amount of the adjustment operation member 11p. The shutter device 11 is opened by a predetermined amount, the amount of the transported material passing through the outlet of the hopper 1 is changed, the area where the intake port is covered by the branch pipe 11c is changed, and the outside and the inside of the outside air introduction pipe 11q are communicated with each other. The opening area (closed area) is designed to change.

The transport line main body 12 is for raising the transported object and then transporting it to a desired position, and connects a plurality of pipes.

As shown in FIG. 2 or 4, the rotary valve 14 includes a casing 14a, a feeding blade 14b rotatably supported in the casing 14a, and a motor 14m for rotating the rotation shaft 14c of the feeding blade 14b. is there. Further, the feeding blade 14b includes a rotating shaft 14c and a plurality of blades 14d protruding radially from the periphery of the rotating shaft 14c. The rotary valve 14 has a feeding blade 14b arranged so as to divide the inside of the casing 14a into a primary side and a secondary side, and is highly airtight. Then, by rotating the feeding blade 14b, the conveyed material that has entered the inside from the opening end on the primary side of the casing 14a is discharged to the opening end on the secondary side in a fixed amount. The rotary valve 14 is connected to the opening end on the primary side of the storage tank 3, and the opening end on the secondary side of the storage tank 3 can be opened and closed as needed.

The air separation / deceleration system 13 includes a first deceleration line 16 that connects the opening end on the primary side to the opening end on the secondary side of the transport line body 12, and a secondary side of the first deceleration line 16. An air separation device 17 that connects the opening end on the primary side to the opening end of the air separation device 17 and separates air from the conveyed object, and the primary side of the air separation device 17 with respect to the opening end on the secondary side that discharges the conveyed object. A second reduction line 18 for connecting the open ends of the above is provided. Further, the exhaust pipe 4 is connected to the open end on the secondary side of the air separation device 17 for discharging air.

The first deceleration pipeline 16 includes a first deceleration pipeline main body 16a and a pair of flange portions 16b, 16c protruding outward in the radial direction from both ends in the length direction of the first deceleration pipeline main body 16a.

The inner diameter of the opening end on the secondary side of the first reduction line main body 16a is larger than the inner diameter of the opening end on the primary side. Further, the first reduction line main body 16a has an inclined surface in which the upper surface side of the inner surface thereof extends horizontally and the lower surface side of the inner surface gradually becomes lower toward the opening end on the secondary side.

The second reduction pipe 18 is a curved pipe 40 as the first pipe 40 of the air separation device 17 that extends in a direction curved with respect to the passage direction of the conveyed object (the length direction of the inner cylinder 21 described later). 40 and a curved pipeline 42 as a second pipeline 42 extending in a direction curved with respect to the length direction of the first curved pipeline 40. In the illustrated example, the first and second curved pipes 40 and 42 are one pipe. The first curved pipeline 40 is provided with a flange portion 18a projecting outward in the radial direction at the primary opening end thereof.

As shown in FIG. 4, the first curved pipe line 40 includes two straight pipe portions 40a and 40a and a curved pipe portion 40b connecting the two straight pipe portions 40a and 40a.
The two straight pipe portions 40a and 40a are arranged so as to intersect each other on an extension line in the length direction, and the internal spaces of the two straight pipe portions 40a and 40a are connected by the internal space of the curved pipe portion 40b. The crossing angle of the two straight pipe portions 40a and 40a is in the range of 35 degrees or more and 90 degrees or less, and is 90 degrees in the illustrated example.
The curved pipe portion 40b is curved so as to smoothly connect the two straight pipe portions 40a and 40a.

The second curved pipe line 42 has the same configuration as the first bent pipe line 40, and connects the two straight pipe portions 42a and 42a and the two straight pipe portions 42a and 42a as shown in FIG. It is provided with a curved pipe portion 42b to be formed.

As shown in FIGS. 2 and 3, the air separation device 17 includes an inner cylinder member 20 for connecting the opening end on the primary side to the opening end on the secondary side of the first reduction pipe line 16 and an inner cylinder member 20. It is provided with an outer cylinder container 30 that is housed in a penetrating state.

The inner cylinder member 20 includes an inner cylinder 21 and a pair of inner flange portions 21a and 21b protruding outward in the radial direction from both ends in the length direction of the inner cylinder 21. The inner cylinder member 20 has a symmetrical shape when viewed from a direction orthogonal to the penetrating direction of the inner cylinder 21 (even when viewed as shown in FIG. 2) or when viewed from a penetrating direction (when viewed as shown in FIG. 3). Therefore, it can be attached to and detached from the outer cylinder container 30 regardless of the direction of penetration.

The inner cylinder 21 is a straight pipe that extends straight, and has a square cylinder shape or a cylindrical shape. The inner diameter of the inner cylinder 21 is equal over the entire length of the inner cylinder 21 in the length direction, and is larger than the inner diameter of the secondary side of the first reduction pipe line 16. Further, the inner cylinder 21 makes the internal space a passage space through which the conveyed object passes by inertia by utilizing the momentum when the conveyed object rushes into the internal space, and the opening end on the primary side thereof is the inlet 22 of the conveyed object and the air. The opening end on the secondary side thereof is used as the discharge port 24 for the transported object, and the air exhaust port 26 is provided on the side surface thereof. The details of the pair of inner flange portions 21a and 21b will be described in the description of the outer cylinder container 30.

The exhaust port 26 is composed of a large number of air holes 26a formed on the side surface of the inner cylinder 21 so as to penetrate in the radial direction thereof. In the illustrated example, the large number of air holes 26a are spaced apart in the length direction. , They are arranged in a matrix with an interval in the circumferential direction. Further, the air holes 26a are pores extending in parallel with the length direction of the inner cylinder 21.

The outer cylinder container 30 includes an outer cylinder 32 that surrounds the inner cylinder 21 outward at equal intervals in the radial direction, and a pair of outer flange portions 32a, 32b that project outward in the radial direction from both ends in the length direction of the outer cylinder 32. And an exhaust cylinder 36 that branches from the middle portion in the length direction of the outer cylinder 32 and is connected to the suction device side.

The outer cylinder 32 is a straight pipe that extends straight, and has a square cylinder shape or a cylindrical shape similar to the shape of the inner cylinder 21. An outlet leading to the exhaust cylinder 36 is formed on the side surface of the outer cylinder 32 so as to penetrate in the radial direction of the outer cylinder 32. The inner diameter of the outer cylinder 32 is equal over the entire length in the length direction of the outer cylinder 32, is formed larger than the outer diameter of the inner cylinder 21, and is formed outside the pair of inner flange portions 21a and 21b of the inner cylinder member 20. It is formed slightly larger than the diameter. Then, when the inner cylinder member 20 is inserted into the outer cylinder 32 in the length direction thereof, the pair of inner flange portions 21a and 21b of the inner cylinder member 20 are fitted into the inner peripheral surface of the outer cylinder 32, and the inner cylinder member 20 is formed. The inner cylinder 21 is positioned so as not to be movable in the caliber direction, the inner cylinder 21 penetrates the outer cylinder 32, and the inner cylinder 21 and the outer cylinder 32 are concentric, that is, the centers in the caliber direction coincide with each other. Further, since the cross-sectional shape of the inner surface of the outer cylinder 32 and the outer shape of the pair of inner flange portions 21a and 21b are similar to each other and the pair of inner flange portions 21a and 21b are plate-shaped, the pair of inner flange portions 21a and 21b Closes between the outer cylinder 32 and the inner cylinder 21 in the radial direction on both sides of the outer cylinder 32 in the length direction. That is, the pair of inner flange portions 21a and 21b also function as a pair of closing portions 34 and 34.

The exhaust stack 36 projects from the side surface of the outer cylinder 32 so as to branch off from the internal space of the outer cylinder 32. In the illustrated example, the primary side portion of the exhaust stack 36 has a shape in which the inner diameter gradually narrows from the primary side to the secondary side.

Of the pair of outer flange portions 32a and 32b, the outer flange portion 32a on the primary side and the outer portion in the radial direction of the flange portion 16c on the secondary side of the first reduction pipe line 16 are joined by, for example, bolts and nuts. Further, of the pair of outer flange portions 32a and 32b, the outer flange portion 32b on the secondary side and the outer portion in the radial direction of the flange portion 18a on the primary side of the second reduction line 18 are similarly joined with bolts and nuts. To. By being joined in this way, the air separation device 17 is integrated with the first and second reduction pipes 16 and 18. In this integrated state, between the flange portion 16c on the secondary side of the first reduction pipe line 16 and the flange portion 18a on the primary side of the second reduction pipe line 18, a pair of inner cylinder members 20 are inside. The flange portions 21a and 21b are sandwiched, and the inner cylinder 21 is positioned immovably in the length direction inside the outer cylinder 32 in the radial direction, and the outer cylinder 32 and the inner cylinder are positioned on both sides of the outer cylinder 32 in the length direction. The space between the caliber directions of 21 is closed with high airtightness, and the flange portion 16c on the secondary side of the first reduction line 16 and the flange portion 18a on the primary side of the second reduction line 18 are paired. It functions as a closed portion 34, 34 of.

Of the pair of closed portions 34, 34, the closed portion 34 on the first reduction line 16 side is the inner flange portion 21a on the primary side of the inner cylinder member 20 and the flange portion 16c on the secondary side of the first reduction line 16. It is composed of the inner part in the radial direction in. Of the pair of closed portions 34, 34, the closed portion 34 on the second reduction line 18 side is the inner flange portion 21b on the secondary side of the inner cylinder member 20 and the flange portion on the primary side of the second reduction line 18. It is composed of 18a. Therefore, in the present embodiment, the air separation device 17 includes a part of the first and second reduction pipes 16 and 18. Each closing portion 34 has a double wall structure in which each flange portion overlaps, which is two plates.

The air separation / deceleration system 13 of the above-described embodiment separates the air and the transported object and decelerates the transport speed of the transported object as follows. In this example, grain seeds (more specifically, rice grains) are used as granules or powders for the transported material.
1) The shutter device 11 is kept fully closed, and rice grains are put into the hopper 1. Then, the rice grains are still housed in the hopper 1, and there are no rice grains in the secondary side portion of the internal space of the main tube 11b of the shutter device 11. Further, the internal space of the outside air introduction pipe 11q communicates with the secondary side portion of the internal space of the main pipe 11b, and a part of the intake port communicates with the outside air.
2) The suction device 6 is driven to make the inside of the transport line 2 negative pressure, and the outside air is taken into the transport line main body 12 from the intake port of the outside air introduction pipe 11q of the shutter device 11 to generate an air flow. Then, the air goes from the transport line main body 12 to the exhaust pipe 4 via the air separation device 17, then to the suction side of the suction device 6 via the dust collector 5, and is discharged from the exhaust side. Further, the motor 14 m of the rotary valve 14 is driven in phase with the drive of the suction device 6.
3) After a lapse of a predetermined time, the shutter device 11 is opened, for example, and rice grains are poured into the transport line 2.
4) The rice grains sucked from the hopper 1 into the transport line main body 12 are directed to the air separation device 17 by the air flow.
5) Rice grains and air rush into the first reduction line 16 from the main body 12 of the transport line, and in the first reduction line 16, the inner diameter of the opening end on the secondary side is wider than the inner diameter of the opening end on the primary side. Because of this, the sucked air and rice grains slow down.
6) Rice grains and air rush into the inner cylinder 21 from the first reduction pipe line 16. Since the inner diameter of the opening end on the primary side of the inner cylinder 21 is larger than the opening end on the secondary side of the first reduction pipe line 16, air and rice grains are decelerated in the inner cylinder 21.
Air enters the internal space between the outer cylinder 32 and the inner cylinder 21 in the radial direction through the exhaust port 26 on the side surface of the inner cylinder 21. Since the inner peripheral surface of the outer cylinder 32 and the outer peripheral surface of the inner cylinder 21 are equally spaced over the entire circumference in the circumferential direction of each other, air is provided between the outer cylinder 32 and the inner cylinder 21 in the radial direction. It is sucked almost evenly from the entire circumference in the circumferential direction and heads toward the exhaust stack 36.
On the other hand, the rice grain decelerates because air is sucked from the side surface of the inner cylinder 21, passes through the internal space of the inner cylinder 21 with the decelerated momentum (inertia), and is second from the discharge port 24 of the inner cylinder 21 as it is. Head to the deceleration line 18.
7-1) The rice grains rush into the second speed reduction pipe 18, and in the second speed reduction pipe 18, the inner diameter of the opening end on the primary side is wider than the inner diameter of the opening end on the secondary side of the inner cylinder 21. Therefore, the rice grain slows down. Each time the rice grains pass through the first and second curved lines 40 and 42 of the second speed reduction line 18, the rice grains decelerate and the rice grains go toward the rotary valve 14. A predetermined amount of rice grains is discharged to the storage tank 3 by the rotation of the feeding blade 14b of the rotary valve 14.
7-2) On the other hand, the air is discharged from the exhaust stack 36 of the air separation device 17 to the suction device 6 through the exhaust pipe 4 and the dust collector 5 in order, and is discharged to the outside of the suction device 6.

The air separation device 17 and the air separation deceleration system 13 of the above embodiment have the following effects.
The main purpose of the air separation device 17 is to separate air from the transported object, and since air is sucked from the side surface of the inner cylinder 21, the inner diameter (capacity) of the outer cylinder 32 is reduced to form the outer cylinder 32. Even if the distance from the inner cylinder 21 in the radial direction is narrowed, the air and the transported object can be separated, which is suitable for miniaturization and easy to install. Moreover, by sucking air from the side surface of the inner cylinder 21, the conveyed object can be decelerated in the inner cylinder 21.
Further, since the air holes 26a are made into pores extending in the length direction of the inner cylinder 21, even if the rice grains touch the portion of the air holes 26a when passing through the internal space of the inner cylinder 21, the rice grains are the pores. It will move along the rice grain, making it harder for the rice grains to be damaged. In addition, an object having a shape different from that of the conveyed object may be mixed in the conveyed object, and the fragments and the like are less likely to pierce the pores, and clogging of the air hole 26a can be prevented.
Further, since the internal space of the inner cylinder 21 is provided as a passage space through which rice grains pass by inertia, the rice grains are less likely to be damaged when the air and the transported object are separated, and eventually powdery substances due to the damage of the rice grains are less likely to be generated. As a result, the amount of powdery material passing through the inside of the exhaust stack 36 is reduced.
Further, since the inner cylinder member 20 in which the inner cylinder 21 and the pair of inner flange portions 21a and 21b are one component is detachable (removable) with respect to the outer cylinder 32 in the length direction, it can be assembled. Easy to inspect. Further, since the inner cylinder 21 and the outer cylinder 32 are arranged concentrically, the suction force of air from the side surface of the inner cylinder 21 can be made uniform over the entire circumference in the circumferential direction, for example, the inner cylinder 21 and the outer cylinder. Compared with the case where the 32 is eccentrically arranged, the amount of suction air is increased and the suction efficiency is improved.
Further, since the exhaust stack 36 is branched from the middle portion in the length direction of the outer cylinder 32, for example, when the outer cylinder 32 is installed horizontally, the exhaust stack is viewed from the length direction (penetration direction) of the outer cylinder. Since the direction of 36 can be installed 360 degrees in a desired direction, it is easy to install the exhaust pipe 4 connected to the exhaust stack 36.

Further, the air separation / deceleration system 13 includes an air separation device 17 and a first deceleration pipeline 16. In the first deceleration pipeline 16, the inner diameter of the opening end on the secondary side is larger than the inner diameter of the opening end on the primary side. The inner diameter of the opening end on the secondary side of the first deceleration pipe 16 is made smaller than the inner diameter of the opening end on the primary side of the inner cylinder 21, so that rice grains are formed in the first deceleration pipe 16. After decelerating the air, it can be sent to the inner cylinder 21, and the rice grains can be decelerated the moment they enter the inner cylinder 21, so that the air and rice grains can be sent to the desired speed with only the air separation device 17. The air separation device 17 can be downsized as compared with the case of decelerating.

Further, since the air separation / deceleration system 13 can decelerate the rice grains by the first and second curved pipes 40 and 42 of the second reduction line 18, the rice grains can be reduced to a desired speed only by the air separation device 17. Compared with the case of decelerating, the air separation device 17 and the air separation / deceleration system 13 as a whole can be miniaturized. Since the rice grains are decelerated by the air separation device 17 and the first and second reduction pipes 16 and 18, the impact when the rice grains collide with the rotary valve 14 is alleviated, and damage to the rice grains can be prevented.

Further, since the inner diameter of the opening end on the primary side of the first bent pipe 40 is made larger than the inner diameter of the opening end on the secondary side of the inner cylinder 21, for example, the opening on the primary side of the first bent pipe 40 Compared with the case where the inner diameter of the end and the inner diameter of the opening end on the secondary side of the inner cylinder 21 are the same, the rice grains can be effectively decelerated, and the air separation device 17 and the entire air separation deceleration system 13 can be made smaller. Can be transformed into.

In the air suction type conveyor of the first embodiment described above, the primary side portions of the first reduction pipe line 16, the air separation device 17, and the second reduction speed pipe line 18 are set so that the passing direction of the conveyed object is horizontal. It was placed. In this case, an unexpected situation, for example, a situation in which the suction device 6 is stopped due to a power failure or an erroneous operation, or a situation in which the amount of suction air by the suction device 6 is insufficient for transporting the transported object, etc. If this occurs, there is a risk that the conveyed items will remain accumulated in the primary side portions of the first speed reduction line 16, the air separation device 17, and the second speed reduction line 18. In this case, even if the suction device 6 is driven, there is a possibility that the accumulation of the conveyed object is not eliminated and the conveyed object cannot be conveyed. In that case, the first speed reduction line 16, the air separation device 17, and the second speed reduction line 18 must be disassembled to remove the accumulated transported material. To avoid such a situation as much as possible, it is desirable to do the following.

As shown in FIGS. 6 and 7, the air suction type conveyor of the second embodiment has the air separation / deceleration system 13 having the first deceleration line 16, the air separation device 17, and the primary side portion of the second deceleration line 18. It is characterized in that the secondary side is set lower than the primary side. More details are as follows.

The transport line main body 12 connecting the opening end on the primary side of the first deceleration line 16 has a straight pipe 12a horizontally arranged in the middle of the entire length and the straight pipe 12a at the end on the secondary side of the total length. It is provided with a bent pipe 12b connected to an open end on the secondary side of the pipe 12a. The bent pipe 12b has a dogleg shape and is curved to smoothly connect the two straight pipe portions 12c and 12d and the two straight pipe portions 12c and 12d into a shape that bends at an angle of less than 90 degrees. It is provided with a pipe portion 12e. Further, one of the two straight pipe portions 12c and 12d, 12c, is connected to the secondary opening end of the straight pipe 12a, and the other 12d is inclined so that the secondary opening end is obliquely downward. Is placed.

The second deceleration line 18 has a bent line 40 as a first line 40 that bends in a dogleg shape, and a first line, like the bent line 12b at the secondary end of the transport line body 12. It is provided with a straight pipe as a second pipe 42 extending in the length direction of the curved pipe 40 of 1. The first curved pipeline 40 includes two straight pipe portions 40a and 40a and a curved pipe portion 40b that connects the two straight pipe portions 40a and 40a in a shape that bends at an angle of less than 90 degrees. In this example, the first curved pipe line 40 and the second straight pipe line 42 are joined to each other by flanges.
The first reduction pipe line 16 is a straight pipe, although the inner diameter of the opening end on the secondary side is larger than the inner diameter of the opening end on the primary side.
Further, the inner cylinder 21 of the air separation device 17 has the same inner diameter over the entire length in the length direction thereof, but this is also a straight pipe.

Then, the straight pipe portion 40a on the primary side of the first reduction pipe line 16, the inner cylinder 21 of the air separation device 17, and the second speed reduction pipe 18 has a penetrating direction with each other in the curved pipe 12b of the transport pipe main body 12. It is arranged so as to be in a straight line with respect to the extension line direction of the straight pipe portion 12d on the next side. Therefore, the penetrating direction of the straight pipe portion 40a on the primary side of the first speed reduction pipe line 16, the inner cylinder 21 of the air separation device 17, and the second speed reduction pipe line 18 is inclined with respect to the horizontal direction, and the inclination angle thereof. The desired range is an angle larger than the rest angle of the transported object, which is 30 ° or more and less than 90 ° with respect to the horizontal direction. Further, since the inner cylinder 21 is inclined in this way, the opening end (outlet 24) on the secondary side of the inner cylinder 21 is lower than the opening end (inlet 22) on the primary side. Further, the straight pipe portion 40a on the secondary side of the second reduction pipe line 18 is arranged so as to face in the vertical direction.
Although not shown, the curved pipe of the main body of the transport pipeline shall be connected to a shape in which two straight pipe portions are bent at an angle of 90 degrees by a curved pipe portion, and the straight pipe portion on the secondary side is in the penetrating direction. May be matched in the vertical direction. In this case, if the first reduction control line and the inner cylinder of the air separation device are arranged so that the penetrating direction is the vertical direction, the penetrating direction is the same as the case where the penetrating direction is inclined with respect to the vertical direction. In addition, the inner cylinder has a lower opening end on the secondary side than the opening end on the primary side. In this case, the second deceleration pipeline shall be a straight pipeline.

The exhaust stack 36 of the air separation device projects downward from the side surface of the outer cylinder 32, and more specifically, protrudes downward so as to be orthogonal to the penetrating direction of the inner pipe 21.

In the case of the air separation / deceleration system 13 of the second embodiment, even if an unexpected situation occurs such that the suction device 6 stops, the inner cylinder 21 and the second deceleration pipe of the first deceleration pipe 16 and the air separation device 17 occur. With respect to the straight pipe portion 40a on the primary side of 18, since the secondary side is lower than the primary side, the transported object naturally falls easily, and in particular, the inclination angle in the penetration direction should be steeper than the rest angle. If this happens, it will inevitably fall, so that it becomes difficult for the conveyed material to collect in the straight pipe portion 40a on the primary side of the inner cylinder 21 of the first reduction pipe line 16, the air separation device 17, and the second reduction speed pipe line 18.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit of the present invention.
For example, in the above embodiment, each closing portion 34 has a double wall structure in which the flange portions overlap each other, which is two plates, but the present invention is not limited to this, and a single wall structure may be used. .. More specific examples are as follows 1) and 2).
1) The pair of inner flange portions 21a and 21b have a plate shape in the above embodiment, but the present invention is not limited to this, and for example, a large number of holes may be formed in the thickness direction of the plate. In this case, since the pair of inner flange portions 21a and 21b have almost no function as a closing portion, the pair of closing portions are the flange portion 16c on the secondary side of the first reduction pipe line 16 and the second reduction pipe. It is formed by a flange portion 18a on the primary side of the path 18.
2) The pair of inner flange portions 21a and 21b are configured to be fitted into the outer cylinder 32 in the above embodiment, but the present invention is not limited to this, and for example, the outer circumferences of the pair of inner flange portions 21a and 21b are fitted. The structure is such that it is integrated with the outer cylinder 32 by welding or the like. In this way, the air separation device 17 has a configuration that does not include a part of the first and second reduction pipes 16 and 18, and the configuration of the above embodiment, that is, the first and second reduction pipes 16 and 18. It will be different from the configuration including a part.
Further, the pair of inner flange portions 21a and 21b are integrated with the inner cylinder 21 in the above embodiment and form a part of the inner cylinder member 20 as one component, but the present invention is not limited to this, and at least One inner flange portion may be a separate part from the inner cylinder 21, or at least one inner flange portion may be integrated with the outer cylinder 32 to form a part of the outer cylinder container 30. In this way, the inner cylinder 21 can be attached to and detached from the outer cylinder 32 in the length direction thereof, either alone or together with at least one inner flange portion.
Further, the second deceleration line 18 is configured to bend at two places in the first embodiment, that is, is composed of the first and second bent lines 40 and 42, but the present invention is not limited to this. It may be more than one place.
Further, the granular material as the transported product was rice grains in the above embodiment, but is not limited to this in the present invention. Examples thereof include plastic pellets used as a raw material for.

1 Hopper 2 Conveyance pipeline 3 Storage tank 4 Exhaust pipe 5 Dust collector 6 Suction device 11 Shutter device 11a Branch pipe (merging pipe)
11b Main pipe 11c Branch pipe (outside air introduction part storage pipe)
11p Adjustment operation member 11q Outside air introduction pipe 11r Closure part 11s Adjustment knob 12 Conveyance pipeline body 12a Straight pipe 12b Bent pipe 13 Air separation / reduction system 14 Rotary valve 14a Casing 14b Feeding blade 14c Rotating shaft 14d Blade 14m Motor 16 Road 16a First speed reduction line main body 16b, c Flange part 17 Air separator 18 Second speed reduction line 18a Flange part 20 Inner cylinder member 21 Inner cylinder 21a, b Inner flange part 22 Inlet 24 Outlet of air Exhaust port 26a Air hole 30 Outer cylinder container 32 Outer cylinder 32a, b Outer flange part 34 Closure part 36 Exhaust pipe 40 First bent pipe (first pipe)
40a Straight pipe part 40b Curved pipe part 42 Second curved pipe (second pipe)
42a Straight pipe part 42b Curved pipe part

Claims (3)

It is provided with an air separation device, a second reduction line connected to the opening end on the secondary side of the inner cylinder of the air separation device, and a first reduction line connected to the opening end on the primary side of the inner cylinder of the air separation device. ,
The air separation device consists of an inner cylinder, an outer cylinder that surrounds the inner cylinder at intervals on the outer side in the radial direction, and a pair that closes between the outer cylinder and the inner cylinder in the radial direction on both sides in the length direction of the outer cylinder. It is equipped with a closed part and an exhaust pipe that branches from the middle part in the length direction of the outer cylinder and connects to the suction device side.
The inner cylinder is provided with a plurality of air holes serving as air outlets on the side surface thereof, with the opening end on the primary side serving as an inlet for the transported object and air, and the opening end on the secondary side serving as an exhaust port for the transported object. At the same time, the internal space is made into a passing space through which the conveyed object passes by inertia.
The second deceleration pipeline has a first curved pipeline extending in a bending direction with respect to the length direction of the inner cylinder, and a first bending pipeline extending in a bending direction with respect to the length direction of the first curved pipeline. Equipped with 2 curved pipelines,
The inner diameter of the opening end on the primary side in the first curved pipeline is larger than the inner diameter of the opening end on the secondary side of the inner cylinder in order to decelerate the transported object.
The opening ends on the primary and secondary sides of the air separation device are provided with inner flange portions that project outward in the radial direction, and each inner flange portion also functions as a closing portion of the air separation device. Air separation deceleration system.
It is equipped with a first reduction line that connects to the opening end on the primary side of the inner cylinder of the air separation device.
The primary side portion of the second reduction pipe, the first reduction pipe, and the inner cylinder of the air separation device are lowered on the secondary side with respect to the primary side and are inclined with respect to the horizontal direction.
The air separation deceleration system according to claim 1, wherein the inclination angle is larger than the rest angle of the transported object and is an angle of 30 ° or more and less than 90 ° with respect to the horizontal direction.
It is provided with an air separation device, a first reduction line connected to the opening end on the primary side of the inner cylinder of the air separation device, and a second reduction line connected to the opening end on the secondary side of the inner cylinder of the air separation device. ,
The air separation device consists of an inner cylinder, an outer cylinder that surrounds the inner cylinder at intervals on the outer side in the radial direction, and a pair that closes between the outer cylinder and the inner cylinder in the radial direction on both sides in the length direction of the outer cylinder. It is equipped with a closed part and an exhaust pipe that branches from the middle part in the length direction of the outer cylinder and connects to the suction device side.
The inner cylinder is provided with a plurality of air holes serving as air outlets on the side surface thereof, with the opening end on the primary side serving as an inlet for the transported object and air, and the opening end on the secondary side serving as an exhaust port for the transported object. At the same time, the internal space is made into a passing space through which the conveyed object passes by inertia.
The opening ends on the primary and secondary sides of the air separation device are provided with inner flange portions that project outward in the radial direction, and each inner flange portion also functions as a closing portion of the air separation device.
The primary side portion of the second reduction pipe, the first reduction pipe, and the inner cylinder of the air separation device are lowered on the secondary side with respect to the primary side and are inclined with respect to the horizontal direction.
An air separation deceleration system characterized in that the inclination angle is larger than the rest angle of the transported object and is an angle of 30 ° or more and less than 90 ° with respect to the horizontal direction.

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