JPH0343438Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a powder ejector.

[Conventional technology]

For example, in a bulk carrier, as shown in the cross-sectional view of the hold in Figure 8, when grains 015 are loaded in bulk into the hold 014 from a loader 011 on land through a rectangular hatch 013 that opens onto the upper deck 012, the grains 015
The upper surface is determined by the lower end position of the hatch rim material 016 and the angle of repose α specific to the grain, and the square tubular hatch rim material 0
An unusable space 017 is created on the outer periphery of 16.

In this case, when the bulk carrier 018 is shaken during the voyage, the grain 015 will move, reducing its stability and reducing the loading rate of the hold 014. 9
As shown in the cross-sectional view of the hold in Figure 10, compressed air 020 is supplied from a blower 019 installed on the upper deck 012 to the powder ejectors 01 attached to the hatch edge material 016, as shown in the partially enlarged view of Figure 10. By sending the grain 015 loaded in the warehouse entrance 013, the grain 015 is sent to the space 017 that cannot be used.

Here, 021 and 022 in the same figure are the hatch side girder plates and hatch end girder plates that respectively cooperate to constitute the rectangular tubular hatch edge material 016, and 08 is the hatch edge from inside the hatch 013. A throat 07 is installed horizontally through the material 016, and a nozzle is piped to the inlet of the throat 08 along the axis 023 of the throat.
and the throat 08 cooperate to form the ejector 01.

However, in such a device, (1) When the specific gravity and particle size of the grain 015 are relatively large, the range h in which powder and granules can be effectively delivered (hereinafter referred to as effective suction and delivery range) is as shown in Fig. 10. So, the upper end level of throat 08 and nozzle 0
Since the area is between the upper level of 7, the grain 015 in the hatched area remains, and the grain 015
The amount of output is small.

(2) Since the axis 09 of the nozzle coincides with the axis 023 of the throat, the air flow from the nozzle 07 is greatly diffused, and the grains 015 cannot be transported to a long distance.

For these reasons, it is difficult to efficiently transport the grains 015 by air into the unavailable space 017.

[Problem that the invention attempts to solve]

The present invention was proposed in view of the above circumstances, and an object of the present invention is to provide an efficient powder ejector that can send out a larger amount of powder and granule to a longer distance.

[Means for solving problems]

To this end, the present invention provides a relatively large-diameter throat projecting laterally from the side wall opening of the vertical introduction tube filled with powder, and arranges the outlet of a relatively small-diameter nozzle at the inlet opening of the throat. In a device that sends out powder and granular material in the introduction cylinder through the throat by supplying compressed air to a nozzle, the nozzle is inclined downwardly and the outlet thereof is opened close to the lower end of the inlet of the throat. It is characterized by

[Effect]

With the above-described configuration, it is possible to obtain an efficient powder ejector that can send out a larger amount of powder and granule to a longer distance.

〔Example〕

An embodiment in which the present invention is applied to a bulk carrier will be explained with reference to the drawings. Fig. 1 is a longitudinal sectional view of the entire structure, Fig. 2 is a horizontal sectional view along - in Fig. 1, and Fig. 3 is a cross-sectional view of the whole. Figure 1 shows the completed loading state.
Figure 4 is a cross-sectional view along the ship's hold shown in Figure 1.
5th partially enlarged perspective view showing the state before loading.
The figure is a partially enlarged view showing the V section in Fig. 1, Fig. 6 is a longitudinal sectional view showing the effective suction and delivery range of the ejector in Fig. 5, and Fig. 7 is a partial perspective view showing a modification of the hold in Fig. 2. It is a diagram.

On the top surface, the same symbols as in FIGS. 8 to 10 indicate the same members as in FIGS. is an air compressor located in the engine room 3, 4, 4 is a compressed air main pipe installed vertically along both sides from the air compressor 2 to the forwardmost hold 014, and 5 is a compressed air main pipe from the compressed air main pipe 4 to the ejector 1 The introduced compressed air branch pipe 6 is an opening for attaching an ejector cut in the hatch side girder plate 021 and the hatch end girder plate 022.

7 is a relatively small-diameter nozzle whose outlet end is very close to the lower end of the bellmouth-shaped inlet of a relatively large-diameter throat 8, and whose axis 9 is inclined downward with respect to the axis 023 of the throat; nozzle 7,
The throat 8 cooperates to constitute the ejector 1.

In such a device, as can be seen by comparing FIGS. 6 and 10, (1) the outlet end of the nozzle 7 is very close to the lower end of the inlet of the throat 8, so h can be made large.

(2) Since the nozzle axis 9 is inclined downward with respect to the throat axis 023, the nozzle axis 9 can be aligned with the inflow direction 10 of the grains 015.

(3) Since the axis 9 of the nozzle is inclined downward with respect to the axis 023 of the throat, the compressed air 020 blown out from the nozzle 7 collides with the throat 8 and then is reflected upward.

In addition, compressed air 020 to the ejector 1
As shown in the modified example shown in Fig. 7, each hold 01
It is also possible to arrange a blower 019 every 4 hours and supply the air with this blower 019.

According to such a device, the following effects can be achieved.

(1) Since the effective suction and delivery range can be increased and the axis of the nozzle can be aligned with the grain inflow direction, the amount of grain delivered can be increased.

(2) Since the air blown out from the nozzle can be reflected upward, the distance the grain can be sent can be increased.

Therefore, as a result of the above-mentioned integrated effects, it is possible to aggressively move cargo into spaces where it is difficult to stow cargo with approximately twice the efficiency compared to conventional methods, thereby ensuring the stability of bulk carriers and improving cargo efficiency. can be improved.

[Effect of idea]

In short, according to the present invention, a relatively large-diameter throat is provided laterally protruding from the side wall opening of a vertical introduction tube filled with powder, and the outlet of a relatively small-diameter nozzle is arranged at the inlet opening of the throat. In the device for feeding the powder and granular material in the introduction cylinder through the throat by supplying compressed air to the nozzle, the nozzle is inclined downwardly and the outlet thereof is opened close to the lower end of the inlet of the throat. As a result, an efficient powder ejector that can send a larger amount of powder to a greater distance is obtained, so the present invention is extremely useful industrially.

[Brief explanation of the drawing]

Fig. 1 is an overall vertical sectional view showing an embodiment in which the present invention is applied to a bulk carrier, and Fig. 2 is a -
3 is a cross-sectional view taken along - , showing the state in which cargo handling is completed in FIG. 1, and FIG. 4 is a partially enlarged view showing the state of one of the holds in FIG. 1 before cargo removal. A perspective view, FIG. 5 is a partially enlarged view showing the V section in FIG. 1, FIG. 6 is a longitudinal sectional view showing the effective suction and delivery range of the ejector in FIG. 5, and FIG. 7 is a modification of the hold in FIG. 2. It is a partial perspective view which shows an example. Figure 8 is a cross-sectional view of a hold showing the loading procedure of a known bulk carrier; Figure 9 is a cross-sectional view of a hold showing the loading procedure of a bulk carrier equipped with a known powder ejector; 9 is a partially enlarged view showing part X in FIG. 9. FIG. 1,01...Ejector, 2...Air compressor, 3...Engine room, 4...Compressed air main pipe, 5...
Compressed air branch pipe, 6...Opening for attaching ejector,
7... Nozzle, 8... Throat, 9... Axis line, 1
0...Inflow direction, 012...Upper deck, 013...
Warehouse, 014...Hold, 015...Grain, 016
...Crackside edge material, 018...Bulk carrier, 019
...Blower, 020...Compressed air, 021...
Harrow mouth side girder plate, 022...Harrow end girder plate, 023
... Throat axis, h ... Effective suction delivery range,
α...Angle of repose.

Claims (1)

[Scope of utility model registration request] A relatively large-diameter throat is provided laterally protruding from the side wall opening of the vertical introduction tube filled with powder, and the outlet of a relatively small-diameter nozzle is arranged at the inlet opening of the throat, and compressed air is supplied to the nozzle. In the apparatus for sending out the powder or granular material in the introduction cylinder through the throat, the nozzle is inclined downwardly and the outlet thereof is opened close to the lower end of the inlet of the throat. body ejector.