JPS5912550B2 - Silo structure - Google Patents

Description

Detailed Description of the Invention The invention of this application relates to a silo structure used for storing explosive, spontaneously combustible dust such as coal powder and grains, or materials that are susceptible to quality changes due to storage over time. In particular, it is possible to improve the maintainability of the drive unit by installing the drive unit outside the tank, by interposing the internal inspection part within the column, or by combining both, and by improving the maintainability of the drive unit during storage. This relates to a silo structure that allows for sufficient quality control of goods.

For example, when coal lumps, coal powder, etc. are stored in large quantities in tanks, they tend to spontaneously ignite due to their own weight and internal heat due to friction, etc.
Even with powdered grains, there is a danger of dust explosions due to some type of fire.

On the other hand, when stored in large quantities, there is a risk that the quality may change due to long-term accumulation, and it is necessary to take measures to prevent this. There is also.

In the silo structure based on the conventional technology, apart from extremely highly fluid powders, when storing particles such as cement, which tend to have a so-called angle of repose, the larger the silo, the more conical piles would be created if the silos were simply fed into the center. The bulk of the silo increases, the loading efficiency deteriorates, and the height and length of the silo must be increased, resulting in economic disadvantages in terms of construction period, cost, etc.

To deal with this, in order to uniformly distribute the stored items brought in from a conveyor, etc., structures with, for example, a revolving conveyor and a tripper or scraper, or a two-stage revolving conveyor, etc., have been widely adopted. It's starting to feel like it's being done.

However, in most of these types of products, their rotation drive mechanism is installed inside the tank, and as a result, the rotation drive mechanism is exposed to the dust of the stored material and the special atmosphere. On the one hand, there is the disadvantage that the mechanism suffers from severe wear and corrosion, requiring frequent maintenance, but on the other hand, there is also the inconvenience of having to perform maintenance work in dusty conditions, which is extremely harsh for workers. Ta.

On the other hand, quality control during storage is always necessary because deterioration and temperature rise may occur during long-term storage of stored materials, and gas generation may occur due to temperature rise. In cases where this may occur, it is necessary to manage the temperature inside the stored items, extract sample gas, collect the stored items, or visually inspect them on a daily basis, but the conventional silos mentioned above However, the inspection and management of the inside of the stored items simply involves temperature detection, which has the disadvantage that precise control over other small points is almost impossible, and the quality tends to be uneven.

In addition, for temperature detection, a temperature detector is hung from the roof above the silo to detect the temperature inside the stored items, and if the cable etc. is cut due to frictional force etc. when taking out the stored items. In many cases, sufficient temperature control was not possible.
The purpose of the invention of this application is to eliminate the above-mentioned drawbacks in view of the problems of the silo structure for powder and granular materials based on the above-mentioned prior art, not only to solve the difficulties and eliminate the disadvantages, but also to achieve stable operation. The aim is to provide an excellent silo structure that enables precise quality control at all times.

The structure of the invention of this application in accordance with the above object is that when storing powder such as coal powder and grains, feed, fertilizer, etc. in a silo, the drive mechanism of the input distribution device that evenly distributes the stored material into the storage tank is connected to the silo. Install the monitoring unit outside so that it is not directly exposed to dust or the atmosphere, and maintain the unit outside the tank, or install the monitoring unit on a support that was installed inside the storage tank. The gist of this invention is to detect the condition of stored items in terms of temperature, generated gas, etc. at main locations in the storage tank, and to perform quality control on a daily basis. An example will be explained below based on the drawings.

Reference numeral 1 denotes a silo serving as a storage tank for powder and granular materials 2 such as coal powder, and a continuous carrying device such as a receiving conveyor 3 is connected to the upper part of the silo from a predetermined loading station.

The end 4 of the receiving conveyor 3 is connected to a fixed chute 5, which is connected to a branch pipe 7 of the input distribution device 6.
It is installed facing the main pipe 8.

The branch pipe is an annular rail 1 installed at the upper end of a support column 9, which will be described later.
The ring gear 12 is attached to the main pipe 8 shown outside the silo 1, and a drive gear 13 that meshes with the ring gear 12 allows for a predetermined deceleration. The device 14 is connected to the drive motor 15.

On the other hand, each of the pillars 9, 9, 9, 9 has a spiral staircase 1.
6, or if it is a large storage tank, a lifting device 17 such as an elevator is installed inside the storage tank, and is appropriately connected to the outside of the silo 1 from the bottom. In addition, inspection windows 18 are provided on the side of the support 9 at predetermined intervals, and the storage tank 2 is provided with windows 18 for inspection.
Control arms 19 are installed at predetermined intervals to allow quality control measures such as temperature detection, sample collection, sample gas extraction, air supply, etc., depending on the stored material, and the control arms 19 can be expanded or contracted depending on the design. It may also be possible to perform remote management through electrical conversion.

As is well known, the silo 1 has a hopper 20 at the bottom.
A predetermined delivery conveyor 2 is formed at the discharge port 21.
2 is interposed so that discharge and conveyance can be carried out as appropriate.

In the above configuration, when a powder or granular material 2 such as coal powder is conveyed and introduced via the receiving conveyor 3, the powder or granular material 2 enters the main pipe 8 of the branch pipe 7 of the charging/distributing device 6 through the fixed chute 5.

The branch pipe 7 is slowly rotated by a drive motor 15, a speed reducer 14, etc., and the granular material 2 is uniformly distributed and stored. During storage, the control arm 19 performs predetermined inspections on the powder and granular material 7 for quality control such as temperature detection, sample collection, and sample gas extraction, and in some cases cool air supply and humidification. etc.

Also, if necessary, a worker can enter the support column 9 and open the inspection window 18.
Visual inspection will be carried out using the elevator 17 etc. for large silos. Then, it is appropriately discharged from the lower discharge conveyor 22 as desired.

On the other hand, if the input distribution device 6 breaks down during economical operation, repairs can be carried out without entering the silo 1.

In the above embodiment, the drive mechanism such as the drive motor 15 of the input distribution device 6 is installed outside the silo 1, and the spiral staircase 16 etc. is installed on the support 9 as an internal inspection section. Of course, either one of them may be adopted depending on the design.

As mentioned above, according to the invention of this application, coal powder, coal lumps,
When storing grain, feed, fertilizer, etc., the drive mechanisms such as motors and gears of the input and distribution device in the silo structure are installed outside the tank so that they are not directly affected by dust. There is no risk of failure due to accumulation, etc., and there is no need to worry about sparks or leakage in the electrical system, which not only increases safety, but also improves durability, and maintenance can be done outside the tank, making the work environment easier. It also has the advantage of being easy to maintain and inspect, making it less likely to break down.

On the other hand, an internal inspection section for stairs, elevators, etc. was installed inside the pillar that had been conventionally installed inside the tank to support the input distribution device, so that inspectors could intervene, and an inspection window was installed in the pillar. This has the advantage that the goods being stored can be directly visually inspected from inside, making quality control easier.

In addition, by providing a control arm on the pillar to detect humidity, collect samples, and supply sample gas extraction, it becomes possible to grasp the internal condition of the stored material from the main part of the storage tank. If thorough quality control can be performed and the detection can be performed remotely via an electrical system, the management will be even more efficient.

Therefore, according to the present invention, it is possible to make the storage tank of the stored material less prone to failure and corrosion, and at the same time, it is possible to improve the management ability, and it is possible to carry out extremely efficient storage with stable quality.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall schematic explanatory diagram, and FIG. 2 is a D---corresponding cross-sectional explanatory diagram. 1...Silo, 6...Input distribution device,
16, 17, 18, 19... Internal inspection department, 20
, 21, 22... Discharge device, 3... Continuous carry-in device (receiving conveyor), 12, 13, 14, 15
...Drive mechanism, 9...Strut.

Claims (1)

[Scope of Claims] 1. In a silo structure having an input distribution device and an internal inspection section, and a discharge device below the silo, the input distribution device has its driving mechanism installed outside the silo. A silo structure characterized by 2. A silo structure having a charging distribution device, an internal inspection section, and a discharging device below the silo structure, characterized in that the internal inspection section is interposed on a support of the charging device. 3. In a silo structure having an input distribution device and an internal inspection section, and a discharge device below the silo, the input distribution device has its drive mechanism installed outside the silo, and the internal inspection section has a drive mechanism installed outside the silo. A silo structure, characterized in that it is interposed on a support of the input distribution device.