JP2006131093A - Powder feeding device of powder freighter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder feeding device of a powder freighter allowing enlargement of volume for loading powder in a hold by reducing labor and time of manufacturing and installation, etc. and the cost. <P>SOLUTION: This powder feeding device X of a powder freighter has air slide members 15 to 17 obliquely arranged in combination of a plurality of the members 15 to 17 at the bottom part of the hold 11 to move powder P mounted on flat ventilating sheets 12 to 14 arranged on upper sides to an oblique lower side by blowing air K from the sheets 12 to 14. The air slide members 15 to 17 have flat plates 19, 32 and 37 formed by arranging a plurality of air holes 18, 31 and 18, the ventilating sheets 12 to 14 closely adhered and fixed to the surroundings of the flat plates 19, 32 and 37 by covering the air holes 18, 31 and 18, ducts 20, 33 and 38 to supply compressed air E to the plurality of air holes 18, 31 and 18, and supporting member 21, 22, 34 and 39 for fixing the flat plates 19, 32 and 37 in the hold 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a powder feeder for a powder cargo ship that is used to supply air from below the powder mounted on the bottom of a cargo hold and move the powder to discharge.

2. Description of the Related Art Conventionally, a powder feeder that supplies air from below the powder has been used to discharge the powder loaded in the hold of the powder cargo ship to the bottom of the hold. In the powder feeder, a plurality of air slide members are provided adjacent to each other on both sides in the width direction of the ship, and each air slide member is inclined at the central portion, and a central slide member is provided. And a side slide member provided to be inclined adjacent to both sides of the central slide member. The central slide member and the side slide member are provided with a box body whose upper part is opened and a canvas attached to the upper part of the box body. The compressed air for flow is introduced into the lower part of the box body from the canvas. By discharging air onto the powder loaded on the canvas, the powder is moved downward using the inclination (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 63-104195

However, the conventional powder feeding apparatus still has the following problems to be solved.
Since the center slide member and the side slide member each have a sealed box body with a canvas attached to the upper part, it requires labor for manufacturing, transporting and installing this framed box body. Production, transportation, and installation periods and their costs were incurred, leading to increased costs.

The present invention has been made in view of such circumstances, and provides a powder feeder for a powder cargo ship that can reduce the time and cost of production, installation, etc., and increase the volume for loading powder in the hold. For the purpose.

A powder feeder for a powder cargo ship according to the present invention that meets the above-mentioned object is arranged in a slanted combination in the bottom of the hold, and air is blown out from a planar ventilation sheet arranged at the top, and loaded on it. A powder feeder for a powder cargo ship having an air slide member that moves the powder to be obliquely moved downward,
The air slide member includes a flat plate in which a plurality of vent holes are arranged side by side, the vent sheet that covers the vent holes and is tightly fixed around the flat plate, and compressed air in the vent holes. And a support member for fixing the flat plate in the hold.

In the powder feeder of the powder cargo ship of the present invention, the air slide member includes a plane plate formed by arranging a plurality of vent holes, and a vent which covers the vent holes and is tightly fixed around the plane plate. Since it has a sheet, a duct for supplying compressed air to a plurality of vent holes, and a support member for fixing the flat plate in the hold, it is easier to manufacture than in the case of a conventional box, and Since transportation and installation are unnecessary, the cost can be reduced. Moreover, since the flat plate to which the ventilation sheet is attached is fixed in the hold through the support member, the height of the flat plate can be lowered, and as a result, the volume in which the powder can be mounted in the hold can be increased.

A plurality of vent holes formed in the flat plate are arranged in a row at the center of the flat plate, and a duct-shaped member having a U-shaped cross section or a C-shaped cross section is provided directly below the plural vent holes. When a flat plate is formed with a part on the center side and an air supply port is provided at one end of the flat plate, maintenance and inspection of the duct integrally provided on the flat plate fixed in the hold The work is eliminated, and the height of the flat plate can be further reduced. As a result, the volume of the powder that can be mounted in the hold can be increased.
It should be noted that a plurality of vent holes formed in the flat plate can be arranged in two or more rows in the central portion of the flat plate, and can be arranged in other than the central portion of the flat plate.
When the width of the channel-shaped member is in the range of 1/20 to 1/4 of the width of the flat plate, compressed air at an appropriate flow rate can be supplied to the ventilation sheet, thereby discharging the powder. The effect is increased.

A central slide member inclined downward toward the center of the width direction of the powder cargo ship, and adjacent to both sides of the central slide member and inclined downward toward the central slide member The side slide member has an inclination angle of 8 to 20 degrees, and the top height of the side slide member on the center side of the hold is 150 to 400 mm from the lower wall of the hold. When it is within the range, the volume in which the powder can be loaded in the hold is further increased.

When the air slide member is provided on the upper inclined cover of the powder discharge means provided at the center of the bottom of the hold, the volume of the powder that can be mounted in the hold is further increased.
When the air slide member is provided on the side wall of the hold, the volume of the powder that can be mounted in the hold is further increased.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a sectional view of a powder cargo ship to which the powder feeder of the powder cargo ship according to one embodiment of the present invention is applied, and FIG. 2 is an application of the powder feeder of the powder cargo ship. FIG. 3 is an exploded view of a powder feeder of the powder cargo ship, and FIGS. 4A, 4B, and 4C are the same powder, respectively. It is a perspective view of the canvas pressing board of the side slide member of the powder feeder of a cargo ship, a canvas, a plane board, and a supporting member.

As shown in FIG. 1 to FIG. 3, a powder feeder (hereinafter simply referred to as a powder feeder) X of a powder cargo ship according to an embodiment of the present invention includes a hold 11 of the powder cargo ship S. It is the apparatus comprised by having the air slide member inclinedly arrange | positioned in combination with two or more at the bottom part. As shown in FIG. 2, the powder feeding device X is a combination of 9 sets of powder feeding mechanisms 10 (see FIG. 3) and 14 sets of powder feeding mechanisms 10a to 10n each having three air slide members. Are arranged. However, although FIG. 2 shows only the port side, as shown in FIG. 1, the port side is also different from the port side. Since the powder feed mechanisms 10a to 10n have basically the same structure as the powder feed mechanism 10, only the powder feed mechanism 10 will be described in detail below, and for the powder feed mechanisms 10a to 10n, Only the characteristic part will be described.

As shown in FIG. 2, the powder feed mechanism 10 shown in FIG. 3 is disposed on the bow side adjacent to the powder feed mechanism 10 a provided at the stern side end.
As shown in FIG. 3, the powder feeding mechanism 10 blows air K from canvases 12 to 14, which are examples of planar ventilation sheets arranged at an upper angle, and the powder loaded thereon. The cement powder P, which is an example of a body, includes a side slide member 15, a center slide member 16, and a side slide member 17 which are examples of an air slide member that moves downward using an inclination. Yes.

The side slide members 15 and 17 face each other with the center slide member 16 in between and are adjacent to both sides of the center slide member 16 in the longitudinal direction of the hull. The canvases 12 to 14 represent, for example, thick plain woven fabrics that are densely woven using warp yarns and weft yarns, such as thick yarns or draw yarns, such as filter cloth.

As shown in FIGS. 3 and 4, the side slide member 15 has a rectangular shape in which a plurality (seven in the embodiment) of the vent holes 18 are arranged in a row in the center and has a thickness of, for example, 6 to 6. A 9 mm flat plate 19, a rectangular canvas 12 that covers the vent hole 18 and is tightly fixed around the flat plate 19, a duct 20 that supplies compressed air E to the plural vent holes 18, and the flat plate And support members 21 and 22 erected to fix 19 to the lower wall W of the hold 11. The support member 22 and the flat plate 19 and the flat plate and the support member of the side slide member of the adjacent powder feeding mechanism are integrally formed by bending a single steel plate. . The lower wall W forms a ceiling wall of the ballast chamber B provided on the ship bottom.

The canvas 12 placed on the surface of the flat plate 19 is fixed via a number of countersunk screws 24 by a canvas presser plate 23 whose outer shape is substantially the same as the canvas 12 and whose inside is cut out in a rectangular shape. The canvas 12 has a thickness of, for example, 5 to 10 mm, and the canvas retainer plate 23 has a thickness of, for example, 3 to 8 mm. A large number of inverted frustoconical counterbore holes 25 are formed around the canvas retainer plate 23, and the mounting holes 26, 27 are located at the respective positions of the canvas 12 and the flat plate 19 corresponding to the positions of the counterbore holes 25. Is formed.

Further, a nut 28 is fixed at a position on the back surface corresponding to the position of the mounting hole 27 of the flat plate 19. With this configuration, the canvas 12 can be fixed to the flat plate 19 from the surface side of the canvas 12 with the countersunk screw 24 via the canvas holding plate 23. In addition, although the inclination angle (alpha) with respect to the horizontal of the canvas 12 (the same is the flat board 19) of the side part slide member 15 changes with properties of the cement powder P, it is set to α = 8 to 20 degrees. This is because when α is less than 8 degrees, the effect of discharging the cement powder P decreases, and when α exceeds 20 degrees, the volume of the cement powder P that can be mounted in the hold 11 is reduced.
The duct 20 is formed to have a groove-shaped member 29 having a U-shaped cross section provided directly below a plurality of vent holes 18 (for example, a hole diameter of 20 to 100 mm) and a part on the center side of the flat plate 19, The flat plate 19 is formed to have substantially the same length in the width direction of the hull, and an air supply port 30 is provided at an end of one side thereof (in the present embodiment, the hull center O side).

As shown in FIG. 3, the central slide member 16 is similar to the flat plate 19, the rectangular flat plate 32 formed with a plurality of vent holes 31 arranged in a row in the central portion, and the canvas 12, A rectangular canvas 13 that covers the plurality of vent holes 31 and is tightly fixed around the flat plate 32, a duct 33 that supplies the compressed air E to the plurality of vent holes 31, and the flat plate, like the duct 20. Support members 22 and 34 provided vertically for fixing 32 to the lower wall W of the hold 11. Therefore, the support member 22 is also used as the side slide member 15 and the center slide member 16. The duct 33 is formed having a groove-shaped member 33a having a U-shaped cross section provided directly below a plurality of vent holes 31 (for example, a hole diameter of 20 to 100 mm) and a part on the center side of the flat plate 32, The flat plate 32 is formed to have substantially the same length in the width direction of the hull, and an air supply port (not shown) is provided at the end of one side (in this embodiment, the hull center O side). It has been.

In the central slide member 16 as well, as in the case of the side slide member 15, the canvas 13 is configured to be fixed to the flat plate 32 from the surface side of the canvas 13 by means of a countersunk screw 35 via a canvas presser plate 34a. Accordingly, nuts 36 are fixed to the back surface of the flat plate 32 in correspondence with positions where a large number of countersunk screws 35 are attached. Note that the canvas 13 (same for the flat plate 32) of the central slide member 16 is provided with an inclination angle β downward in the width direction of the hull toward the hull center O, and the inclination angle β is cement powder. Although it depends on the properties of P, β = 8 to 20 degrees (see FIG. 1). The thickness of the canvas 13 is, for example, 5 to 10 mm, and the thickness of the canvas holding plate 34a is, for example, 3 to 8 mm.

As shown in FIG. 3, the side slide member 17, like the side slide member 15, has a rectangular shape in which a plurality of (seven in the embodiment) vent holes 18 are arranged in a row at the center. The flat plate 37, the rectangular canvas 14 that covers the vent hole 18 and is tightly fixed around the flat plate 37, the duct 38 that supplies the compressed air E to the plural vent holes 18, and the flat plate 37 It has standing support members 34 and 39 fixed to the lower wall W of the hold 11. The support member 34, the flat plate 37, the flat plate 19 of the adjacent powder feeding mechanism 10 and the support member (corresponding to the support member 22) are integrally formed by bending a single steel plate. It is configured. Further, the support member 39 (same as the support member 21) can be omitted as necessary, as shown in FIG.

The canvas 14 placed on the surface of the flat plate 37 has an outer shape substantially the same as that of the canvas 14 and is fixed via a number of countersunk screws 24 by a canvas presser plate 40 cut out in a rectangular shape on the inside. A number of frustoconical counterbore holes 25 are formed around the canvas presser plate 40, and attachment holes 26 and 27 are provided at positions of the canvas 14 and the flat plate 37 corresponding to the positions of the counterbore holes 25, respectively. Is formed. The canvases 12 and 14 and the canvas pressing plates 23 and 40 can be the same.

Further, the nut 28 is fixed at the position of the back surface corresponding to the position of the mounting hole 27 of the flat plate 37. With this configuration, the canvas 14 can be fixed to the flat plate 37 from the surface side of the canvas 14 with the countersunk screw 24 via the canvas pressing plate 40. A hexagonal hole is formed in the head of the countersunk screw 24 so that the countersunk screw 24 can be easily attached and detached. As in the case of the side slide member 15, the inclination angle α of the side slide member 17 with respect to the horizontal of the canvas 14 (same for the flat plate 37) varies depending on the properties of the cement powder P, but α = 8 to 20 degrees.

The duct 38 has a groove-shaped member 29 having a U-shaped cross section provided immediately below the plurality of vent holes 18 and a part of the center side of the flat plate 37, and is formed to have substantially the same length as the flat plate 37. An air supply port (not shown) is provided at the end of one side (in the present embodiment, the hull center O side). The width T of the groove-shaped member 29 is set to 1/20 to 1/4 of the width t of the flat plates 19 and 37, more preferably in the range of 1/15 to 1/10. When the width T is less than (1/20) t, the effective cross-sectional area of the duct is reduced, the air resistance of the duct is increased, and the amount of air ejected from the vent hole on the front side of the duct is reduced. On the other hand, when the width T exceeds (1/4) t, the duct shape becomes large, which is not economical.

By arranging the duct 20 (38) integrally on the flat plate 19 (37) and directly attaching it to the hull via the support members 21, 22 (34, 39), a side slide member is provided. 15 (17), the height H on the center side of the hold is in the range of 150 to 400 mm from the lower wall W of the hold 11 and can be made lower than in the case of a conventional box, so more cement The powder P can be mounted in the hold 11. The top height H = 150 to 400 mm is determined in consideration of α = 8 to 20 degrees. Further, as described above, the support member 21 (39) can be omitted if the strength of the flat plate 37 (19) formed integrally adjacent to the flat plate 19 (37) is sufficient. .

As shown in FIGS. 1 and 2, the air slide member 41 is provided on an upper inclined cover 43 of a chain conveyor 42 (42 a), which is an example of a powder discharge means provided at the bottom center of the hold 11. ing. The air slide member 44 is provided on the side wall 45 of the hold 11 so as to be inclined. The air slide member 41 (the same as the air slide member 44) has the same structure as the side slide member 15 (17) or the center slide member 16 of the powder feeding mechanism 10, and has a predetermined length in the hold 11. Many are provided adjacent to each other. By providing the air slide members 41 and 44 in such a place that is usually narrow and difficult to install, the amount of the cement powder P remaining in the hold 11 can be reduced.

As shown in FIG. 2, in the nine powder feeding mechanisms 10 arranged on the stern side, the side slide member 15, the center slide member 16 and the bow side slide member 17 arranged on the stern side. In the powder feed mechanisms 10f, 10g, 10j to 10m arranged on the bow side, the stern side slide member, the center slide member, and the bow side length are the same. The length of the side slide member in the width direction of the hull differs depending on the shape of the hull.

Furthermore, in the powder feeding mechanisms 10a to 10e, 10h, 10i, and 10n, either the stern side slide member or the bow side slide member is a ship's hold so that the air slide member is shown in black. The inclination angle α is set larger than that of the side slide members 15 and 17 in consideration of the partition wall provided in 11 and the reinforcing rib fixed to the partition wall. Among these, the powder feed mechanisms 10d and 10e arranged at the center in the longitudinal direction of the hull are arranged to face each other, and one side slide member is divided into two in the width direction of the hull, and The position is shifted in the longitudinal direction of the hull, and the side slide member corresponding to the shifted length is connected to the center slide member. In addition, air piping (main pipe, branch pipe) and an on-off valve are provided so that compressed air can be supplied and stopped for each powder feed mechanism.

As shown in FIG. 1 and FIG. 2, two chain conveyors 42 and 42a are provided along the longitudinal direction of the hull, and the chain conveyor 42 is connected to the powder feeding mechanism 10d from the powder feeding mechanism 10a on the stern side. On the other hand, the chain conveyor 42a conveys the cement powder P discharged from the powder feed mechanism 10e on the bow side to the powder feed mechanism 10n.
As shown in FIG. 2, a gate portion 46 made of a damper is connected to the bottom end portion of the central slide member of all the powder feeding mechanisms, and the gate portion 46 is connected to the chain conveyors 42 and 42a. Has been. The cement powder P conveyed by the chain conveyors 42 and 42a is unloaded separately by a loading means.

Next, a method of using and operating the powder feeder X of the powder cargo ship according to the embodiment of the present invention will be described.
In consideration of the change in the center of gravity of the hull, each air slide member (side) of the starboard side powder feed mechanism 10 (10a to 10n is the same) and the starboard side powder feed mechanism which are paired with one or more pairs The on-off valve is operated so as to supply the compressed air E to the ducts 20, 33, 38 of the partial slide member 15, the central slide member 16, and the side slide member 17).

The cement powder P loaded on the canvases 12 to 14 inclined slightly downward through a plurality of vent holes 18, 31, 18 formed in the ducts 20, 33, 38 to which the compressed air E is supplied. The air E is ejected, and finally the cement powder P is moved to the downstream end of the lower central part slide member 16 and delivered to the chain conveyor 42 or 42a via the gate part 46.
The delivered cement powder P is conveyed by the chain conveyor 42 or 42a and then unloaded by the unloading means. The chain conveyor 42 or 42a is operated before the compressed air E is supplied.

The present invention is not limited to the above-described embodiments, and can be changed without departing from the gist of the present invention. For example, some or all of the above-described embodiments and modifications are included. The case where the powder feeder of the powder cargo ship of the present invention is configured in combination is also included in the scope of the right of the present invention.
Although cement powder was used as the powder, the present invention is not limited to this, and other powders such as fly ash and charcoal cal can be used as necessary.
Although the groove-shaped members 29 and 33a have a U-shaped cross section, the present invention is not limited thereto, and may be a C-shaped cross section or other shapes as necessary. Moreover, although the integral member was used for the groove-shaped members 29 and 33a, it is not limited to this, It can also form by welding the piece of three steel plates as needed.

The flat plate and the support member are integrally formed by bending a single iron plate. However, the present invention is not limited to this, and the pieces can be integrated by welding or the like as necessary. Further, depending on the properties of the powder to be mounted, materials other than iron plates, such as stainless steel plates, can also be used.
As for the material of the duct and the canvas holding plate, iron, stainless steel, or other materials can be selected according to the properties of the powder to be mounted, similarly to the flat plate and the support member.
The plurality of vent holes are formed in a single row in the central portion of the flat plate, but the present invention is not limited to this, and can be arranged in two or more rows as necessary. Further, depending on the situation, a zigzag or It can also be arranged randomly.

It is sectional drawing of the powder cargo ship to which the powder feeder of the powder cargo ship which concerns on one embodiment of this invention is applied. It is the top view which abbreviate | omitted some powder cargo ships to which the powder feeder of the powder cargo ship is applied. It is an exploded view of the powder feeder of the powder cargo ship. (A), (B), (C) is a perspective view of the canvas presser plate, canvas, flat plate and support member of the side slide member of the powder feeder of the same powder cargo ship, respectively.

Explanation of symbols

10, 10a to 10n: Powder feed mechanism of powder cargo ship, 11: Ship hold, 12-14: Canvas (ventilated sheet), 15: Side slide member (air slide member), 16: Center slide member (air Slide member), 17: side slide member (air slide member), 18: vent hole, 19: flat plate, 20: duct, 21: support member, 22: support member, 23: canvas presser plate, 24: countersunk screw 25: counterbore hole, 26, 27: mounting hole, 28: nut, 29: groove member, 30: air supply port, 31: vent hole, 32: plane plate, 33: duct, 33a: groove member, 34: Support member, 34a: Canvas press plate, 35: Countersunk screw, 36: Nut, 37: Planar plate, 38: Duct, 39: Support member, 40: Canvas press plate, 41: Air slide member, 42, 42a: H Nkonbea (powder discharge means), 43: upper inclined cover, 44: air slide member, 45: side wall, 46: gate unit

Claims (6)

A powder cargo ship having an air slide member that is inclinedly arranged in combination at the bottom of the cargo hold and blows air from a flat ventilation sheet arranged at the top and moves the powder loaded thereon obliquely downward A powder feeding device of
The air slide member includes a flat plate in which a plurality of vent holes are arranged side by side, the vent sheet that covers the vent holes and is tightly fixed around the flat plate, and compressed air in the vent holes. A powder feeder for a powder cargo ship, comprising: a duct that supplies the flat plate; and a support member that fixes the flat plate in the hold. 2. The powder feeding device for a powder cargo ship according to claim 1, wherein the plurality of vent holes formed in the flat plate are arranged in a line at a central portion of the flat plate, and the duct is connected to the plurality of through holes. A groove-shaped member having a U-shaped cross section or a C-shaped cross section provided immediately below the pores and a part of the center side of the flat plate is formed, and an air supply port is provided at one end thereof. A powder feeder for a powder cargo ship. 3. A powder cargo ship for a powder cargo ship according to claim 2, wherein the width of the groove-shaped member is in the range of 1/20 to 1/4 of the width of the flat plate. Powder feeder. In the powder feeder of the powder cargo ship according to any one of claims 1 to 3, a central slide member provided to be inclined downward toward a center portion in the width direction of the powder cargo ship; And a side slide member provided adjacent to both sides of the center slide member and inclined downward toward the center slide member, and the tilt angle of the side slide member is 8 to 20 degrees. The top portion of the side slide member on the center side of the hold is in the range of 150 to 400 mm from the lower wall of the hold. The powder feeder of the powder cargo ship according to any one of claims 1 to 3, wherein the air slide member is located above an upper inclined cover of a powder discharge means provided at a bottom center of the hold. A powder feeder for a powder cargo ship provided in 4. The powder cargo ship according to claim 1, wherein the air slide member is provided on a side wall of the cargo hold. 5. Body feeder.

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