JP3158332B2 - Bulk storage with dispensing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a bulk storage for bulk materials such as coal, limestone, iron ore and wood chips, and in particular to a bulk storage with a dispensing device having a dispensing device for dispensing stored bulk materials to a dispensing opening formed in a bottom wall. The present invention relates to a bulk storage with a dispensing device, which is placed in an environment where a large displacement is repeated for a long time.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a screw 3a extending in a horizontal direction along the inner surface of a bottom wall 2a of a storage tank 1a is rotatably disposed at the center of the bottom wall 2 at its base end position. A payout port 6 which is supported by the apparatus main body 4a so as to be pivotable, and which communicates with a conveyor pit 5a formed below the payout apparatus main body 4a on the bottom wall 2 at the position thereof.
A bulk storage with a dispensing device having a dispensing device 7a forming a is known.

[0003] Such a bulk storage is fixed such as a silo installed on a hard ground, and there is no problem when the storage period is short, but for example, a silo installed on a soft ground is difficult. In the case where large displacements repeatedly occur for a long period of time, such as in a storage tank disposed on a bulk carrier carrying out long-term voyages, the stored bulk material 8a is densely packed by natural consolidation due to its own weight and vibration consolidation. Storage.

Accordingly, since the screw 3a disposed in the storage 1a is buried in the high-density bulk material 8a, an extremely large starting torque is required at the start of dispensing.
Therefore, the dispensing device 7a having a high horsepower driving mechanism and enduring a large starting torque is required,
Particularly, there is a problem that it is extremely uneconomical since a large starting torque is required only at the time of starting.

In the above-mentioned conventional bulk storage, electric wires and pipes for transmitting power and electric signals to the dispensing device 7a are provided from a conveyor pit 5a formed below the bottom wall 2a of the storage tank 1a. It must be supplied and the effective use of space cannot be measured, and the dispensing device main body 4a
Joint 9a rotatably supports the conveyor pit 5
because it is located within a, must set high height h ₂ of the conveyor pit 5a, a lower storage modulus in the occupied area, there is also a problem that, in particular, have a limited space This is an important issue for ships that require a high storage rate within a large occupied area.

[0006]

A problem to be solved by the present invention is that a screw extending horizontally along the inner surface of the bottom wall of a conventional storage tank is rotatably disposed on the bottom wall at a base end position thereof. The dispensing device-equipped bulk storage, which is supported by the dispensing device main body and is rotatably arranged, and which has a dispensing opening communicating with a conveyor pit formed below the dispensing device main body at the bottom wall position, If large displacements are repeated for a long period of time, the screw will be buried in a high-density storage material, requiring an extremely large starting torque at the start of dispensing, and a driving mechanism with a high horsepower and a dispensing device that can withstand the large starting torque will be extremely inefficient. It must be economical, and electric wires and pipes for sending power and electric signals must be supplied from the conveyor pit formed below the bottom wall of the storage tank. With effective use not be measured in Banara not a space, the rotary joint for rotatably supporting the dispenser body low storage modulus within the area occupied with placing in a conveyor pit, is that.

[0007]

According to the present invention, there is provided a bulk storage with a dispensing device, wherein a free fulcrum is provided between a side wall of a storage tank and the dispensing device above a stop position of the screw. With the configuration in which the pressure diffusion cover is arranged, large displacement is repeated during storage of bulk material, and even when bulk material is continuously densified for a long time, a large starting torque is not required at the start of dispensing, In addition, the object of the present invention is to provide a bulk storage with a dispensing device having a storage ratio within a large occupied area by disposing a rotary joint that supports a turning shaft of a screw in the cone in the above configuration.

[0008]

A gap is formed above the screw by the pressure diffusion cover disposed above the screw to prevent the screw from being buried in a high-density storage material.

In addition, the pressure diffusion cover is provided on the main body of the dispensing device and the side wall of the storage tank with a free fulcrum.
The pressure diffusion cover absorbs the displacement of the entire device due to the storage object and the displacement due to the external pressure on the side wall and the bottom wall of the storage tank, thereby preventing an abnormal load from occurring.

[0010] Further, by arranging electric wires and pipes for sending power and electric signals to the dispensing device inside the pressure diffusion cover, effective use of space is measured, and a rotary joint for turning the screw is provided. By arranging in the cone, the height of the conveyor pit can be set low, and the storage rate in the occupied area is improved.

[0011]

1 to 5 show an embodiment of the present invention. A cylindrical dispensing device main body 4 is inserted into a circular opening 3 formed in the center of a bottom wall 2 constituting a storage tank 1. FIG. Are rotatably arranged via a large bearing 5 and the storage tank 1
A screw 7 extending in the horizontal direction along the inner surface of the bottom wall 2 to the vicinity of the side wall 6 is rotatably supported by a cylindrical dispensing device main body 4 rotatably disposed at the center of the bottom wall 2 at a base end position. Are located in

The bottom wall 2 is provided with a payout port 9 communicating with a conveyor pit 8 formed below the payout device main body 4.

An umbrella-shaped cone 10 is arranged at the upper end of the dispensing device main body 4.

The cone 10 has a pair of substrates 11, 11 arranged inside and parallel to each other with an interval therebetween. A pair of substrates 14, 14, which extend parallel to each other and extend along the axis of the screw 7, are rotatably mounted via pins 15, 15 on a circular frame 13 rotatably disposed via a bearing 12. To the free fulcrum 1 between the cone 10 and the dispensing device main body 4.
6,16.

Further, in the cone 10, the dispensing device main body 4 is provided.
And a pressure diffusion cover 18 is arranged in the storage tank 1 above the stop position of the screw 7.

The pressure diffusion cover 18 is formed in a hollow roof shape having a planar shape covering the screw 7 and having an elongated cross section of a triangular shape.
Are connected to the cone 10 which is connected to the cone 10 via free fulcrums 16, 16.

The other end 20 of the pressure diffusion cover 18 is provided with a pair of projections 21 and 21 projecting from the lower surface thereof in a recess 23 provided on the upper surface of a horizontal base 22 projecting from the side wall 6 of the storage tank 1. Are connected to the side wall 6 via free fulcrums 24, 24 formed by being mounted so as to be slidable in the axial direction in a certain range and swingable about the projection 21 in the axial direction.

In the drawings, reference numeral 25 denotes a conveyor pit 8
Reference numeral 26 denotes a turning drive unit of the screw 7, and reference numeral 27 denotes a rotation drive unit of the screw 7.

In this embodiment having the above-described structure, the screw 7 extending horizontally along the inner surface of the bottom wall 2 of the storage tank 1 is rotated at its base end position, similarly to the conventional bulk storage with dispensing device. The cargo handling is performed by discharging the bulk material 28 in the storage tank 1 to a payout port 9 leading to a conveyor 25 disposed in a conveyor pit 8 formed below the base end position of the screw 7 on the bottom wall 2. It is.

At this time, in the present embodiment, a gap is formed above the screw 7 by the pressure diffusion cover 18 disposed above the screw 7 to prevent the screw 7 from being buried in a high-density storage material.

Therefore, as in the case of being installed on a bulk carrier, for example, large displacements are repeated during a long voyage and repeated for a long period of time. Even if it becomes, a large starting torque is not necessary to start the screw 7 at the start of dispensing, and therefore, there is no need for a high horsepower driving mechanism and a dispensing device that can withstand a large starting torque, and it is extremely economical. .

In particular, the pressure diffusion cover 18 is
6, 16, 24, and 24, which are bridged between the dispensing device main body 4 and the side wall 6 of the storage tank 1.
In order to prevent the occurrence of an abnormal load by absorbing the displacement of the whole apparatus due to the load P of the bulk material 28 which is a storage material added to the storage tank, and the displacement due to the external pressure F on the side wall 6 and the bottom wall 2 of the storage tank 1, The pressure diffusion cover 18 and the dispensing device are not deformed or damaged.

Further, in the present embodiment, electric wires and pipes for transmitting power and electric signals to the dispensing device are supplied not through the conventional conveyor pit 8 but through the inner portion of the pressure diffusion cover 18 to save space. Effective utilization can be measured.

Furthermore, in the present embodiment, since the rotary joint 17 for rotatably supporting the dispensing apparatus main body 4 is arranged in the cone 10, the conventional dispensing apparatus in which the conventional rotary joint is arranged in the conveyor pit. it is possible to improve the storage modulus at a possible and occupies an area that setting a low height h ₁ of the conveyor pit 8 than the urging rose product reservoir.

[0025]

According to the present invention, the pressure diffusion cover is arranged above the stop position of the screw constituting the dispensing device, so that even if the stored bulk material becomes a high-density storage material, it is arranged above the screw. The formed pressure diffusion cover forms a gap between the screw and the screw, thereby preventing the screw from being buried in a high-density bulk material.

Therefore, a large starting torque is not required for starting the screw at the start of dispensing, so that a high horsepower drive mechanism and a dispensing device capable of withstanding a large starting torque are not required, and it is very economical.

Further, since the pressure diffusion cover has a free fulcrum and is constructed so as to extend between the dispensing device main body and the side wall of the storage tank, the storage material applied to the pressure diffusion cover at these free fulcrum portions is provided. In order to prevent the occurrence of abnormal load by absorbing the displacement of the entire device due to the load of the bulk material and the external pressure on the side wall and bottom wall of the storage tank, the displacement causes the pressure diffusion cover and dispensing device to be deformed and damaged Never do.

Further, by supplying electric wires and pipes for transmitting power and electric signals to the dispensing device through the inside of the pressure diffusion cover, effective use of space can be achieved.

Further, the rotary joint for rotatably supporting the dispensing device main body is arranged in the cone, so that the conventional rotary joint is arranged in the conveyor pit, compared with the conventional bulk storage with dispensing device. As a result, the height of the conveyor pit can be set low, and the storage rate within the occupied area can be improved.

[Brief description of the drawings]

FIG. 1 is a partially cut-away side view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 2;

FIG. 3 is an enlarged cross-sectional view taken along line XX of FIG. 1;

FIG. 4 is an enlarged sectional partial view showing an upper part of a dispensing device main body in the embodiment shown in FIG.

FIG. 5 is an enlarged partial side view showing a distal end side of the pressure diffusion cover in the embodiment shown in FIG. 1;

FIG. 6 is a partially cutaway front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage tank 2 Bottom wall 4 Dispensing device main body 6 Side wall 7 Screw 8 Conveyor pit 9 Discharge port 10 Cone 16 Free fulcrum 17 Rotary joint 18 Pressure diffusion cover 24 Free fulcrum

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuji Uehara 2-1-1 Toranomon, Minato-ku, Tokyo Osaka MOL Mitsui Shipping Co., Ltd. (72) Inventor Mikio Iio 2-28 Asahimachi, Omuta-shi, Fukuoka Co., Ltd. Mitsui Miike Works Miike Works (72) Inventor Nozomu Toyoda 2-1-1 Nihonbashi Muromachi, Chuo-ku, Tokyo Mitsui Miike Works Co., Ltd. (72) Inventor Yutaka Omori 2-28 Asahicho, Omuta-shi, Fukuoka Co., Ltd. Mitsui Miike Works, Miike Works (56) References JP-A-6-107339 (JP, A) Japanese Utility Model Sho 51-58065 (JP, U) Japanese Utility Model Sho 58-71031 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65G 65/30-65/48

Claims (2)

(57) [Claims] 1. A screw extending in a horizontal direction along an inner surface of a bottom wall of a storage tank is rotatably supported at a base end position thereof by being supported by a dispensing device main body rotatably disposed on the bottom wall. In a bulk storage with a dispensing device, which has a dispensing opening communicating with a conveyor pit formed below the dispensing device main body on the bottom wall, a side wall of the storage tank and the dispensing device are disposed above a stop position of the screw. A bulk storage with a dispensing device, wherein a pressure diffusion cover erected with a free fulcrum on the device is arranged. 2. A bulk storage with a dispensing device according to claim 1, wherein a rotary joint for rotatably supporting the dispensing device main body is disposed in a cone disposed on an upper portion of the dispensing device main body.