JP2021109769A - Foreign matter removal device - Google Patents

Abstract

An object of the present invention is to provide a foreign matter removal device that can protect a pneumatic unloader and suppress an increase in cargo handling stop time. SOLUTION: A foreign matter removal device 100 for removing foreign matter from particulate matter G during cargo handling by suctioning and conveying the particulate matter G with a pneumatic unloader 1, the suction nozzle 10 sucking the particulate matter G. and a filter member 20 that is disposed to cover the suction port 10a of the suction nozzle 10, allows the particulate matter G to pass therethrough, and collects foreign matter contained in the particulate matter G. [Selection diagram] Figure 2

Description

The present invention relates to a foreign matter removing device.

The pneumatic unloader is, for example, a cargo handling machine that sucks and transports granular cargo handling objects loaded on a ship moored on a quay from a suction nozzle.

Traditionally, pneumatic unloaders have been widely used for loading and unloading grains (soybeans, maize, etc.).

On the other hand, in recent years, for example, when handling biomass pellets used as a part of fuel in a thermal power plant, a pneumatic unloader is used for the purpose of suppressing the generation of dust during cargo handling.

Japanese Unexamined Patent Publication No. 2013-159468

However, biomass pellets and the like have a problem that the amount of foreign substances (for example, workers' equipment, tools, beverage containers) mixed in is much larger than that of grains. Such foreign matter can damage the pneumatic unloader when sucked through the suction nozzle. Further, in order to remove the foreign matter, the cargo handling work must be stopped, and the work efficiency may decrease due to the increase in the cargo handling stop time.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a foreign matter removing device capable of protecting a pneumatic unloader and suppressing an increase in cargo handling stop time.

According to one aspect of the present invention, a foreign matter removing device for removing foreign matter from the particulate matter when loading and unloading by sucking and transporting the particulate matter with a pneumatic unloader, and a suction nozzle for sucking the particulate matter. Provided is a foreign matter removing device, which is arranged so as to cover the suction port of the suction nozzle, allows the particulate matter to pass through, and includes a filter member for collecting foreign matter contained in the particulate matter.

Further, the filter member is formed in a bottomed tubular shape, the bottom portion thereof is arranged so as to face the suction port, is arranged between the suction nozzle and the filter member, and holds the filter member in the suction nozzle. It is preferable to further provide a holding member.

Further, it is preferable to provide a variable mechanism for changing the distance between the suction port of the suction nozzle and the bottom of the filter member.

Further, it is preferable that the filter member has an outer filter portion arranged so as to cover the tubular portion from the outside in the radial direction.

The present invention provides a foreign matter removing device that can protect the pneumatic unloader and suppress an increase in cargo handling stop time.

It is a side view which shows the schematic structure of the pneumatic unloader of 1st Embodiment. FIG. 5 is an enlarged cross-sectional view of the foreign matter removing device shown in Part II of FIG. It is sectional drawing of the line III-III shown in FIG. It is a bottom view of the filter member shown in FIG. FIG. 5 is an enlarged cross-sectional view of the foreign matter removing device of the second embodiment. It is sectional drawing of the VI-VI line shown in FIG. It is an enlarged cross-sectional view which shows the operation of a variable mechanism. FIG. 5 is an enlarged cross-sectional view of the foreign matter removing device of the third embodiment. It is sectional drawing of the IX-IX line shown in FIG. It is a bottom view of the filter member shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that each direction of up, down, front, back, left, and right shown in the figure is merely defined for convenience of explanation.

(First Embodiment)
First, the overall configuration of the pneumatic unloader 1 of the first embodiment will be described with reference to FIGS. 1 and 2. The dotted arrow A shown in the figure represents the air flow.

As shown in FIG. 1, the pneumatic unloader 1 includes a suction pump 2 and a receiver tank 3 arranged on the quay B side, a boom 4 connected to the receiver tank 3, and an undulating device 5 for raising and lowering the boom 4. A horizontal pipe 6 extending along the boom 4, a bend pipe 7 connected to the tip of the horizontal pipe 6, and a vertical pipe 8 connected to the tip of the bend pipe 7 are provided. Further, the pneumatic unloader 1 is provided with a suction nozzle 10 which is connected to the tip of the vertical pipe 8 and sucks the granular cargo handling material (particulate matter G) loaded in the hold S of the ship.

Particulate matter G is a biomass pellet used as a part of fuel in a thermal power plant or the like. However, the particulate matter G may be of a type other than the biomass pellets.

The suction pump 2 is composed of a vacuum pump and generates a suction flow. Further, the suction pump 2 is connected to the receiver tank 3 via the suction pipe 2a.

The receiver tank 3 has a container-shaped tank body 3a extending in the vertical direction, a mast portion 3b provided on the side of the tank body 3a and extending above the tank body 3a, and a lower end of the tank body 3a. The rotary feeder 3c connected to the above is provided.

The tank body 3a is configured to separate particulate matter from the suction stream by gravity. An undulating device 5 is provided on the upper part of the mast portion 3b. The rotary feeder 3c is configured to discharge the particulate matter G to the conveyor C while maintaining the negative pressure in the tank body 3a.

The boom 4 is vertically connected to the mast portion 3b and extends laterally. A wire 5a is connected to the tip of the boom 4. The wire 5a is wound around the undulating device 5 to support the boom 4.

The undulation device 5 is configured to adjust the depression / elevation angle of the boom 4 by adjusting the unwinding length of the wire 5a.

The horizontal pipe 6 is supported by the wire 5a via the boom 4. Further, the horizontal pipe 6 is configured to be raised and lowered together with the boom 4 and expandable and contractable in the pipe axis direction. The bend pipe 7 is bent downward from the tip position of the horizontal pipe 6. The vertical pipe 8 extends downward in the vertical direction from the lower end position of the bend pipe 7 and is configured to be expandable and contractible in the pipe axial direction.

In the pneumatic unloader 1 of the first embodiment, the elevation angle of the horizontal pipe 6 is adjusted, and the lengths of the horizontal pipe 6 and the vertical pipe 8 in the axial direction are adjusted, so that the inside of the shipyard S is adjusted. The suction nozzle 10 can be moved to an arbitrary position.

As shown in FIG. 2, a nozzle having a double tube structure is used for the suction nozzle 10. In FIG. 2, reference numeral X indicates a central axis of the suction nozzle 10.

The suction nozzle 10 includes an inner pipe 11 extending in the vertical direction, an outer pipe 12 arranged with a gap outside in the radial direction from the inner pipe 11, and a connecting pipe 13 provided at the upper end of the inner pipe 11. To be equipped. These tubes 11 to 13 are arranged coaxially with each other.

The upper end of the inner pipe 11 is connected to the lower end of the vertical pipe 8 (see FIG. 1) via the connecting pipe 13. On the other hand, the upper end of the outer pipe 12 is open to the atmosphere so that air can be introduced into the gap between the inner pipe 11 and the outer pipe 12.

The outer pipe 12 is supported by the inner pipe 11 via a bracket (not shown). Further, the outer pipe 12 extends downward along the outer peripheral surface of the inner pipe 11. The lower end portion 12a of the outer pipe 12 extends downward from the lower end of the inner pipe 11 and is bent inward in the radial direction. The suction port 10a of the suction nozzle 10 is located at the lower end of the outer tube 12.

When loading and unloading the particulate matter G, the suction nozzle 10 is moved while the suction pump 2 (see FIG. 1) is operated, and the suction nozzle 10 with respect to the particulate matter G loaded in the hull S. Insert the suction port 10a.

In the suction nozzle 10, the particulate matter G is sucked from the suction port 10a into the inner pipe 11 by the suction flow of the suction pump 2. Further, the particulate matter G is accelerated by the air flowing into the inner pipe 11 through the gap between the inner pipe 11 and the outer pipe 12.

As shown in FIG. 1, the granular substance G sucked by the suction nozzle 10 is sucked into the tank body 3a of the receiver tank 3 from the connecting pipe 13 through the vertical pipe 8, the bend pipe 7, and the horizontal pipe 6, and is sucked into the tank body 3a. It is separated from the suction flow in 3a and falls, and is discharged from the rotary feeder 3c to the conveyor C. Further, the suction flow from which the particulate matter G is separated is sucked into the suction pump 2 through the suction pipe 2a.

As described above, according to the pneumatic unloader 1, the particulate matter G loaded in the hold S can be sucked from the suction nozzle 10 and sucked and transported for cargo handling.

By the way, conventionally, the pneumatic unloader is often used for loading and unloading grains (soybeans, maize, etc.) which are particulate matter. On the other hand, in recent years, as described above, the pneumatic unloader 1 is also used when loading and unloading biomass pellets which are particulate matter G.

Biomass pellets are more likely to generate dust during cargo handling than grains, but the Pneumatic Unloader 1 can handle cargo while suppressing the generation of dust as compared with a continuous unloader equipped with a bucket elevator.

However, biomass pellets have a problem that the amount of foreign substances (for example, worker's equipment, tools, beverage containers) mixed in is much larger than that of grains. When such foreign matter is sucked from the suction nozzle 10, it may clog the rotary feeder 3c of the receiver tank 3 and damage the pneumatic unloader 1. Further, in order to remove the foreign matter, the cargo handling work must be stopped, and the work efficiency may decrease due to the increase in the cargo handling stop time.

Therefore, the pneumatic unloader 1 of the first embodiment is provided with a foreign matter removing device 100 for removing foreign matter from the particulate matter G.

As shown in FIGS. 2 to 4, the foreign matter removing device 100 includes a suction nozzle 10 and a filter member 20 arranged so as to cover the suction port 10a of the suction nozzle 10.

Further, the foreign matter removing device 100 is further provided with a holding member 30 which is arranged between the suction nozzle 10 and the filter member 20 and holds (suspends) the filter member 20 in the suction nozzle 10.

The filter member 20 is configured to allow the particulate matter G to pass through and to collect foreign substances contained in the particulate matter G. Further, the filter member 20 is formed in a bottomed tubular shape, and is arranged so as to cover the lower part of the suction nozzle 10 from below.

The bottom portion 21 and the tubular portion 22 of the filter member 20 are made of wire mesh members and are supported by the bottom frame 20a, the tubular portion frame 20b, and the edge frame 20c.

The bottom portion 21 is formed in a disk shape and is arranged coaxially with the suction nozzle 10. The tubular portion 22 is formed in a cylindrical shape and is arranged coaxially with the suction nozzle 10.

Further, the bottom portion 21 is arranged so as to face the suction port 10a of the suction nozzle 10. Although the details will be described later, the distance between the suction port 10a of the suction nozzle 10 and the bottom portion 21 of the filter member 20 is set to the distance L where the suction port 10a and the bottom portion 21 are in contact with or close to each other.

At the upper end of the tubular portion 22, for example, when the suction port 10a of the suction nozzle 10 is inserted into the particulate matter G loaded in the hold S and sucked, the foreign matter contained in the granular material G sucks the tubular portion 22. It is set to a height position that cannot be overcome.

The bottom frame 20a is formed in an annular shape and is arranged on the outer peripheral portion of the bottom portion 21. The tubular frame 22a is formed in a columnar shape and is arranged so as to extend upward in the vertical direction from the bottom frame 20a. Further, a plurality of tubular frame 20b (eight in the illustrated example) are provided, and are arranged at equal intervals in the circumferential direction. The edge frame 20c is formed in an annular shape and is arranged at the upper end of the tubular portion 22.

The holding member 30 includes a horizontal member 31 connected to the outer peripheral surface of the outer pipe 12 and a vertical member 32 connected to the horizontal member 31. However, the horizontal member 31 may be connected to the outer peripheral surface of the connecting pipe 13 instead of the outer peripheral surface of the outer pipe 12.

The horizontal member 31 of the first embodiment is formed in a plate shape and extends horizontally from the outer peripheral surface of the outer pipe 12 toward the outside in the radial direction. The vertical member 32 is formed in a plate shape and extends downward in the vertical direction from the lower surface of the horizontal member 31. The lower end of the vertical member 32 is connected to the edge frame 20c via a connecting member 33 installed above the edge frame 20c.

A plurality of horizontal members 31, vertical members 32, and connecting members 33 (4 each in the illustrated example) are provided, and are arranged at equal intervals in the circumferential direction of the suction nozzle 10.

In the foreign matter removing device 100 of the first embodiment, when the particulate matter G is sucked by the suction nozzle 10, the foreign matter contained in the particulate matter G is collected by the filter member 20. As a result, foreign matter is removed from the particulate matter G, and only the particulate matter G can be sucked by the suction nozzle 10.

As a result, clogging of the rotary feeder 3c due to foreign matter can be suppressed, and damage to the pneumatic unloader 1 can be suppressed. Further, since it is not necessary to stop the cargo handling work in order to remove the foreign matter, an increase in the cargo handling stop time can be suppressed, and a decrease in work efficiency can be suppressed.

Therefore, the foreign matter removing device 100 of the first embodiment can protect the pneumatic unloader 1 and suppress an increase in the cargo handling stop time.

Further, in the first embodiment, the filter member 20 is formed in a bottomed tubular shape, and the bottom portion 21 thereof is arranged so as to face the suction port 10a of the suction nozzle 10. With such a filter member 20, since the entire suction port 10a can be covered from below, foreign matter contained in the particulate matter G can be effectively removed.

(Second Embodiment)
As shown in FIGS. 5 to 7, the foreign matter removing device 100 of the second embodiment includes a variable mechanism 40 that changes the distances L1 and L2 between the suction port 10a of the suction nozzle 10 and the bottom 21 of the filter member 20. The other parts are the same as those in the first embodiment.

As shown in FIGS. 5 and 6, the variable mechanism 40 is provided on the holding member 30. The holding member 30 of the second embodiment includes first and second members 41 and 42 arranged so as to overlap each other instead of the vertical member 32 of the first embodiment shown in FIGS. 2 and 3.

The first member 41 is formed in a plate shape and extends downward in the vertical direction from the lower surface of the tip portion of the horizontal member 31. The second member 42 is formed in a plate shape and extends upward in the vertical direction from the upper surface of the connecting member 33. Further, the second member 42 is arranged inside the first member 41 in the radial direction of the suction nozzle 10.

On the other hand, the horizontal member 31 of the second embodiment is formed with a slit 31a penetrating in the vertical direction. The second member 42 is inserted into and fitted into the slit 31a, and is held so as to be movable in the vertical direction with respect to the horizontal member 31.

The first member 41 is formed with one insertion hole 41a penetrating in the radial direction of the suction nozzle 10. On the other hand, a plurality of (two in the illustrated example) insertion holes 42a and 42b penetrating in the radial direction of the suction nozzle 10 are formed in the second member 42 at intervals in the vertical direction.

As shown in FIGS. 5 and 7, the insertion hole 41a of the first member 41 is arranged coaxially with the lower insertion hole 42a or the upper insertion hole 42b of the second member 42. Then, the pin member 43 is inserted into the insertion holes 41a, 42a, 42b arranged coaxially. As a result, the vertical movement of the second member 42 with respect to the first member 41 is restricted, and the filter member 20 is held (suspended) by the holding member 30. A toggle mechanism 43a for preventing the pin member 43 is provided at the tip of the pin member 43.

The variable mechanism 40 pulls out the pin member 43 and switches the insertion holes 42a and 42b of the second member 42 arranged coaxially with the insertion holes 41a of the first member 41 to switch the second member 42 with respect to the first member 41. The height position of the can be changed. As a result, the height position of the filter member 20 with respect to the suction nozzle 10 is changed, and the distances L1 and L2 between the suction port 10a of the suction nozzle 10 and the bottom portion 21 of the filter member 20 are changed.

In FIG. 5, the insertion hole 41a of the first member 41 is arranged coaxially with the insertion hole 42a on the lower side of the second member 42, and the pin member 43 is inserted through these insertion holes 41a and 42a. At this time, the distance between the suction port 10a of the suction nozzle 10 and the bottom portion 21 of the filter member 20 is the first distance L1 in which the suction port 10a and the bottom portion 21 are in contact with or close to each other, as in the distance L described in the first embodiment. Is set to (L = L1).

The term "proximity" as used herein means, for example, that when the particulate matter G remaining on the bottom surface Sa of the shipyard S is sucked by the suction nozzle 10, the suction port 10a and the particulate matter are determined by the distance L between the suction port 10a and the bottom portion 21. It means a distance at which the suction of the particulate matter G is not hindered even when a gap is formed between the G and the G.

On the other hand, in FIG. 7, the insertion hole 41a of the first member 41 is arranged coaxially with the insertion hole 42b on the upper side of the second member 42, and the pin member 43 is inserted through these insertion holes 41a and 42b. At this time, the distance between the suction port 10a of the suction nozzle 10 and the bottom portion 21 of the filter member 20 is set to the second distance L2, which is larger than the first distance L1 and the suction port 10a and the bottom portion 21 are separated from each other (L =). L1 <L2).

The term "separation" as used herein means, for example, that the bottom portion 21 of the filter member 20 hinders suction when the suction port 10a of the suction nozzle 10 is inserted into and sucks the particulate matter G loaded in the hold S. It means a distance that does not become.

That is, when the suction port 10a of the suction nozzle 10 is inserted into the particulate matter G loaded in the shipyard S for suction, if the suction port 10a and the bottom portion 21 are in contact with or close to each other, There is a possibility that the bottom portion 21 becomes a resistance and it becomes difficult to suck the particulate matter G.

On the other hand, in the second embodiment, the suction port 10a and the bottom portion 21 are separated from each other by setting the distance between the suction port 10a and the bottom portion 21 to the second distance L2 by the variable mechanism 40. As a result, the resistance due to the bottom portion 21 is suppressed, and the particulate matter G can be easily sucked.

On the other hand, when the particulate matter G remaining on the bottom surface Sa of the shipyard S is sucked by the suction nozzle 10, if the suction port 10a and the bottom portion 21 are separated from each other, there is a gap between the suction port 10a and the particulate matter G. May interfere with the suction of particulate matter G.

On the other hand, in the second embodiment, the distance between the suction port 10a and the bottom portion 21 is set to the first distance L1 by the variable mechanism 40, so that the suction port 10a and the bottom portion 21 are brought into contact with or close to each other. NS. As a result, the gap between the suction port 10a and the particulate matter G can be reduced, so that the suction of the particulate matter G can be suppressed from being hindered.

(Third Embodiment)
As shown in FIGS. 8 to 10, the filter member 20 of the third embodiment has an outer filter portion 23 arranged so as to cover the tubular portion 22 from the outside in the radial direction. The other parts are the same as those in the first embodiment.

The outer filter portion 23 includes an outer bottom portion 23a having a bottom portion 21 extending radially outside the cylinder portion 22, and an outer cylinder portion 23b arranged radially outside the cylinder portion 22.

The outer bottom portion 23a is formed in an annular shape and is arranged coaxially with the bottom portion 21. The outer tubular portion 23b is formed in a cylindrical shape and extends upward in the vertical direction from the outer peripheral portion of the outer bottom portion 23a.

The outer bottom portion 23a and the outer cylinder portion 23b are made of wire mesh members and are supported by the outer bottom frame 20d, the outer cylinder frame 20e, and the outer edge frame 20f. Further, the upper end of the outer tubular portion 23b is set at the same height position as the tubular portion 22.

The outer bottom frame 20d is formed in an annular shape and is arranged on the outer peripheral portion of the outer bottom 23a. Further, the outer bottom frame 20d is connected to the bottom frame 20a via a columnar lower end frame 20g extending in the radial direction. The outer tubular frame 20e is formed in a columnar shape and is arranged so as to extend upward in the vertical direction from the outer bottom frame 20d. The outer edge frame 20f is formed in an annular shape and is arranged at the upper end of the outer cylinder 23b. Further, the outer edge frame 20f is connected to the edge frame 20c via a columnar upper end frame 20h extending in the radial direction. A plurality of outer tubular frame 20e, lower end frame 20g, and upper end frame 20h (8 in the illustrated example) are provided, and are arranged at equal intervals in the circumferential direction.

According to the third embodiment, for example, when the suction port 10a of the suction nozzle 10 is inserted into and sucks the granular substance G loaded in the hold S from the outside in the radial direction toward the suction port 10a. The foreign matter that is about to flow in can be doubly collected by the tubular portion 22 and the outer filter portion 23.

As a result, foreign matter can be reliably removed as compared with the filter member 20 of the first embodiment, which is composed of only the bottom portion 21 and the tubular portion 22. The third embodiment can also be applied to the second embodiment described above.

On the other hand, although not shown, the above-described embodiment can be a modified example as described below or a combination of the modified examples.

(First modification)
The shape of the filter member 20 is not limited to the bottomed tubular shape, and may be any shape. For example, in the first modification, the shape of the filter member 20 is formed in a hemispherical shape curved downward in the vertical direction.

(Second modification)
The holding means of the filter member 20 is not limited to the holding member 30, and may be any means. For example, in the second modification, the holding member 30 is omitted, and the filter member itself is connected to the suction nozzle.

(Third modification example)
The distance between the suction port 10a of the suction nozzle 10 and the bottom portion 21 of the filter member 20 may be arbitrary. In particular, the variable mechanism 40 of the second embodiment may not only change the distance in two steps of the first distance L1 and the second distance L2, but may also change the distance in more steps. For example, in the variable mechanism 40 of the third modification, three insertion holes are formed in the second member 42, and the distance is changed in three steps according to the type and remaining amount of the granular substance.

(Fourth modification)
In the third embodiment, the filter member 20 may include not only the outer filter portion 23 but also the lower filter portion that covers the lower side of the bottom portion 21. For example, in the filter member 20 of the fourth modification, a lower filter member made of a wire mesh member is provided adjacent to the lower surfaces of the bottom portion 21 and the outer bottom portion 23a.

The configurations of each of the above embodiments can be combined partially or wholly, unless otherwise inconsistent. The embodiment of the present invention is not limited to the above-described embodiment, and all modifications, applications, and equivalents included in the idea of the present invention defined by the scope of claims are included in the present invention. Therefore, the present invention should not be construed in a limited manner and can be applied to any other technique belonging to the scope of the idea of the present invention.

1 Pneumatic unloader 10 Suction nozzle 10a Suction port 20 Filter member 21 Bottom 30 Holding member 100 Foreign matter remover G Particulate matter

Claims (4)

A foreign matter removing device for removing foreign matter from particulate matter when loading and unloading by sucking and transporting particulate matter with a pneumatic unloader.
A suction nozzle that sucks particulate matter,
A foreign matter removing device, which is arranged so as to cover the suction port of the suction nozzle, is provided with a filter member for passing a granular substance and collecting foreign matter contained in the granular substance. The filter member is formed in a bottomed tubular shape, and the bottom portion thereof is arranged so as to face the suction port.
The foreign matter removing device according to claim 1, further comprising a holding member arranged between the suction nozzle and the filter member and holding the filter member in the suction nozzle. The foreign matter removing device according to claim 2, further comprising a variable mechanism for changing the distance between the suction port of the suction nozzle and the bottom of the filter member. The foreign matter removing device according to claim 2 or 3, wherein the filter member has an outer filter portion arranged so as to cover the tubular portion from the outside in the radial direction.

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