JP5869355B2 - Storage container for anti-arching, anti-arching device, and method of processing stored product using the same - Google Patents

Description

  The present invention relates to an anti-arching storage container, an anti-arching device, and a method for treating stored items using the same.

  Wheat bran (wheat hull) generated after grinding wheat is mainly useful as livestock feed and is generally stored in a storage container called a silo. However, wheat bran is easy to absorb moisture and causes a phenomenon called arching in the storage container, especially in humid seasons. Arching is a phenomenon in which a part of a stored product is solidified in a storage container to be in a crosslinked state, and a cavity is generated below the stored product in the crosslinked state. In such a case, it becomes difficult for the stored item above the crosslinked stored item to fall in the container, and as a result, the stored item cannot be discharged from the container. In addition, when arching occurs, wheat bran stored in the storage container for a long time is fermented by the effects of the microorganisms inside, and gives off a bad odor to the surroundings.

  As a technique for such a problem, for example, Patent Document 1 discloses an apparatus for destroying an arch bridge of a granular material formed in a container, and a hopper portion at the bottom of a main body container filled with the granular material. The taper-shaped hopper wall inclined obliquely downward is provided with hopper wall swinging means for repeatedly applying a force for pushing the hopper wall into the inner side and a force for lifting the hopper wall toward the outer side. An arch bridge breaking device is disclosed. According to this, it is described that the bridge can be surely eliminated in a short time without any danger in the work.

  In Patent Document 2, a socket is provided on an inclined wall at the bottom of a silo-type granular material storage tank, and an air blowing pipe that can be moved forward and backward with respect to the storage tank through the socket is hermetically disposed. The tip is provided with an air outlet that opens transversely to the axis of the pipe, the base of the pipe is connected to a compressed air source via a valve, and the pipe is moved in and out along the axis. An apparatus for eliminating the bridging of powder particles, which is provided with a handle that is rotatable at the center, is disclosed. And according to this, it is described that it is possible to provide a device that is simple in structure, and therefore can be provided easily and at low cost, can reliably eliminate the bridge, and is easy to maintain. Yes.

  In Patent Document 3, in a silo in which powder is stored in a silo body and an outlet is formed at the lower end of the silo body, a plurality of high-pressure air nozzles that eject high-pressure air into the silo body are placed at the upper position of the outlet. A high pressure air supply pipe whose base end communicates with the compressor and whose front end communicates with another system via a cooler is branched between the compressor and the cooler to form a branch pipe for the high pressure air supply pipe. A silo bridge eliminating device is disclosed, which is connected to the high-pressure air nozzle. And according to this, the high-pressure dry high-pressure air that was diverted before the cooler is ejected from the high-pressure air nozzle to the silo body through the branch pipe, so that the powder bridge in the silo body without giving moisture to the powder. It is described that the phenomenon can be prevented.

  In Patent Document 4, a storage tank for storing grains, a primary heat exchanger and a secondary heat exchanger installed outside the storage tank, and a blower are connected by a ventilation pipe to supply cooling air. A circulation path is formed, heat exchange is performed between cooling air circulating in the ventilation pipe by the primary heat exchanger and an external cold heat source, and the primary heat exchanger is performed by the secondary heat exchanger. Heat exchange between the cooling air cooled in the tank and the grains carried into the storage tank, and the grains cooled in advance by the secondary heat exchanger into the storage tank through the pipe for carrying in grains. Carrying in and storing in bulk, cooling air cooled by the primary heat exchanger is guided into the storage tank by the blower and ventilation pipes, and passes through the grain layer stored in bulk, Temperature sensor arranged in the storage tank or a ventilation pipe The grain storage device is characterized in that the temperature and humidity of the grain in the storage tank are kept constant by controlling the heat source by feeding back the above information to the primary heat exchanger and the secondary heat exchanger. ing. And according to this, the grain stored in storage tanks such as silos grows due to the heat generated for growth and the quality deteriorates, and the grains stored in the storage tanks such as silos are taken out regularly. Reduced quality due to wear, damage, and deterioration of grains caused by cooling, dehumidification, and storage in silo storage tanks, cooling and dehumidification of grains while being stored in silo storage tanks, and carrying out and carrying in It is described that can be prevented.

  Patent Document 5 includes an upright cylindrical container having an input port at the top and a discharge port at the bottom, and a stored granule in a drying silo that performs a drying process by flowing hot air from below to the particles stored in the container. A baffle for dropping the body by mass flow is provided in the lower part of the container, and the baffle is inclined downward from the center of the container toward the peripheral wall of the container and the outer peripheral edge in the radial direction is equidistant from the peripheral wall. Provided with a substantially conical portion provided, a blowing pipe for blowing hot air vertically below the baffle until the lower end reaches the discharge port, and equidistant from the peripheral wall, The tip opening of the blow pipe is positioned in the inner space of the baffle, and a number of air outlets are provided in the middle of the baffle in the vertical direction. It has a special structure Drying silo is disclosed to. And, according to this, it is possible to perform a uniform drying process by flowing hot air uniformly over the stored particles, and also prevent mass flow when discharging the particles. It is stated that it can be discharged by

JP 2009-67400 A Utility Model Registration No. 3121183 Japanese Utility Model Publication No. 5-58692 Japanese Patent No. 2751895 JP-A-7-332851

  However, in Patent Document 1, an attempt is made to eliminate arching by attaching a powder discharge accelerator such as a vibration device or a striking device to a hopper below the silo. However, such a powder discharge accelerator is used. Then, the gaps between the powders in the silo are filled, and as a result, the powder is solidified in the silo, and the arching may become stronger on the contrary.

  Further, in Patent Documents 2 and 3, high-pressure air is injected into the silo body and the hopper to cause arching to collapse, but this can only cope with the local arching collapse by high-pressure injection of air. It is difficult to properly collapse arching that occurs indefinitely throughout the silo.

  Further, in Patent Documents 4 and 5, ventilation baffles, pipes, and steel balls are formed in the silo and the inside of the silo is adjusted to dry or constant temperature, but such an obstacle exists in the silo. Then, there is a risk of arching starting from that point.

Furthermore, for the above problem, for example:
A technology that smoothes the inner wall of the silo and prevents the occurrence of arching, and previously stored the fluid in a hot air at about 100 ° C for about 5 minutes using a fluid dryer, etc. There are a technique for adjusting the moisture and storing it in a silo, a technique for carrying out a transfer process in order to prevent condensation at the bottom of the silo after storage, and the like.
However, it cannot be said that the above technique is sufficient for suppressing arching. For this reason, when arching occurs, a worker applies a shock from the outside of the silo with a hammer or a rod to destroy the arching in the silo, but if it does not collapse, the worker enters the silo and uses a vacuum machine Sucking up and moving to another silo. However, such work is dangerous because there is a risk of a collapse accident and oxygen deficiency, and because the silo capacity is several tens of tons, it takes time, labor, and large expenses for the transfer work.

  Accordingly, the present invention provides a storage container for preventing arching that can effectively suppress the occurrence of arching due to the stored material stored in the container, and can easily eliminate arching even if arching should occur. It is an object of the present invention to provide an anti-arching device and a method for treating a stored product using the same.

  The present inventor has intensively studied in order to solve the above-mentioned problem. It has been found that the occurrence can be suppressed well, and even if arching occurs, the arching can be easily eliminated at low cost by supplying air from the side wall of the container body.

The present invention completed on the basis of the above knowledge is, in one aspect, an anti-arching storage container that prevents arching by drying the stored product with air , and has a stored product inlet at the top, and a stored product outlet includes a downwardly, a container body having a plurality of air supply holes are formed through the side wall, provided at a position corresponding to the air supply hole and said container along the inner surface of the side wall of the container body An anti-arching storage container provided with a breathable sheet continuously provided in the up-down direction of the inner surface of the side wall of the main body .

  In one embodiment of the storage container for arching prevention according to the present invention, the stored product is a powder or a granule.

  In another embodiment of the storage container for arching prevention according to the present invention, the powder is flour, starch, feed, fertilizer, rice bran, sugar, chemical, powder seasoning, food additive, powder processed food, and It is one of spices, and the granule is cereal or legume.

  In another embodiment of the storage container for preventing arching according to the present invention, the container is a silo or a tank.

  In yet another embodiment of the storage container for arching prevention according to the present invention, a plurality of air supply holes of the container body are formed at intervals in the circumferential direction and the vertical direction of the side wall of the container body. .

  In another embodiment of the storage container for arching prevention according to the present invention, the sheet is a vegetable fiber containing cotton and hemp, an animal fiber containing silk, wool and cashmere, a regenerated fiber containing rayon and cupra, and acetate. Semi-synthetic fibers including triacetate and promix, nylon, polyester, acrylic, aramid, vinylon, vinylidene, synthetic fibers including polyvinyl chloride, polyethylene, polypropylene and polyurethane, and inorganic fibers including glass, carbon, metal and ceramic It is formed of one or more selected from the group consisting of

  In another embodiment of the storage container for arching prevention according to the present invention, the container body includes a measuring unit that measures the storage amount of the stored product.

  In another aspect of the present invention, there is provided an anti-arching device comprising the anti-arching storage container of the present invention and an air supply device for supplying air to the air supply hole of the anti-arching storage container.

  In one embodiment of the anti-arching device according to the present invention, the air supplied from the air supply device is dry air.

  In another embodiment, the anti-arching device according to the present invention further includes an air adjustment valve that adjusts the supply of air to the anti-arching storage container.

  In still another embodiment, the arching prevention device according to the present invention further includes a dust collection unit that collects the stored matter scattered outside the container.

  In yet another aspect of the present invention, the step of throwing a stored product into the container main body, and supplying air from the air supply hole to the container main body into which the stored product has been fed, It is a processing method of the store using the anti-arching device of the present invention including the process of drying the store.

According to the present invention, at least the following effects can be obtained.
(1) By supplying air from the air supply hole to the container body, the air passes through the gap between the sheet and the container body or the air-permeable sheet, and as a result, the air is diffused to the place away from the supply hole. To reach. For this reason, a store thing is dried over a wide range with air, and generation | occurrence | production of arching can be favorably suppressed over a wide range within a container main body.
(2) By supplying air from the air supply hole to the container body, the stored material filled in the container body can be dried, so that the stored material is previously dried using a fluid dryer as before. It is no longer necessary to make a large amount of equipment and space.
(3) After filling, even if the moisture adjustment is not successful, and arching should occur, arching can be easily eliminated by supplying air from the air supply hole to the container body again to dry the stored items. Can do. Therefore, it is not necessary for the worker to manually break the arching, and he is freed from dangers such as a collapse accident and oxygen deficiency.

It is a schematic diagram of the arching prevention apparatus which concerns on embodiment of this invention. It is a schematic diagram of each structural member of the arching prevention apparatus used in the Example. It is a top view of the acrylic board used in the Example. It is a top view of the cylindrical tube used in the Example. It is a schematic diagram of the base and weight used in the Example. It is a schematic diagram of the arching test apparatus used in the Example.

(Configuration of anti-arching device)
The configuration of the arching prevention device 100 according to the embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, the schematic diagram of the arching prevention apparatus 100 which concerns on embodiment of this invention is shown. The anti-arching device 100 includes an anti-arching storage container 2.
The storage container 2 for preventing arcing includes a storage body inlet 2 at the top, a storage outlet 13 'at the bottom, and a container body 2' in which a plurality of air supply holes 5 are formed so as to penetrate the side wall. And a breathable sheet 3 provided along the inner surface of the side wall of the container body 2 '. The container body 2 ′ is formed in a cylindrical shape. In addition, the container body 2 ′ may be formed in a polygonal column shape, and may further have a longitudinal section tapered. The inner surface of the side wall of the container body 2 ′ is formed on a smooth surface free from obstacles such as protrusions that cause the stored material 1 to be arched. The container body 2 ′ is not particularly limited, but can be formed using, for example, a metal material such as iron or stainless steel, concrete, or the like. Although the magnitude | size of container main body 2 'is not specifically limited, Typically, when forming in a column shape, it shall be a bottom face with a radius of 1-2 m, and height shall be 10-20 m.

  The sheet 3 is provided along the inner surface of the side wall of the container body 2 '. The sheet 3 is continuously provided in the vertical direction of the inner surface of the side wall of the container body 2 'without being interrupted. Further, the sheet 3 may be provided continuously in the circumferential direction of the inner surface of the side wall of the container body 2 ′, or may be provided only partially, in which case it corresponds to the air supply hole 5. It is preferable that it is provided in the location. More preferably, the sheet 3 is provided over the entire inner surface of the side wall of the container body 2 '. The sheet 3 may be configured by combining a plurality of materials, but it is more preferable that the sheet 3 is formed of a single material because it does not have a connecting portion that can be a protrusion. The sheet 3 is formed of a material having air permeability. As a material having air permeability, a sheet-like material in which fine holes are formed can be used. Further, it is more preferable that the sheet 3 has a good strength that is not easily damaged by the stored material being put into the container body 2 '. As described above, the sheet 3 having air permeability and good strength includes, for example, plant fibers including cotton and hemp, animal fibers including silk, wool and cashmere, regenerated fibers including rayon and cupra, and acetate. Semi-synthetic fibers including triacetate and promix, nylon, polyester, acrylic, aramid, vinylon, vinylidene, synthetic fibers including polyvinyl chloride, polyethylene, polypropylene and polyurethane, and inorganic fibers including glass, carbon, metal and ceramic It can form with 1 or more types selected from the group which consists of.

The stored product 1 stored in the storage container 2 for preventing arching according to the present invention is not particularly limited. For example, powder or particles that can be stored in the container and generate arching by absorbing moisture in the air. Etc. The powder may be any of cereal flour, starch, feed, fertilizer, rice bran, sugar, chemicals, powder seasoning, food additive, powder processed food and spice, and the grains are cereals or beans It may be.
Furthermore, among these, as flour, wheat flour, rice flour, corn flour, barley flour, oat flour, rye flour, rye flour, sorghum flour, millet flour, millet flour, barn flour, buckwheat flour, oat flour, quinoa flour, kinako flour Etc.
Starches include corn starch, wheat starch, rice starch, corn starch, tapioca starch, potato starch, sweet potato starch, mung bean starch, kuzu starch, katsuri starch, bracken starch, sago starch and / or acetylated adipic acid cross-linked starch, acetylated Phosphoric acid cross-linked starch, acetylated oxidized starch, octenyl succinic acid sodium starch, acetic acid starch, oxidized starch, hydroxypropyl starch, hydroxypropylated phosphoric acid crosslinked starch, phosphoric acid monoesterified phosphoric acid crosslinked starch, phosphorylated starch, phosphoric acid crosslinked Examples include starch.
As feed and fertilizer, incineration ash, plant ash, bone meal, fish meal, chicken dung, cow dung, horse dung, wheat bran, rice bran, wheat straw, corn hull, and one or more kinds as raw materials Is mentioned.
As cocoons, soybean meal, rapeseed meal, cottonseed meal, corn meal, safflower meal, sesame meal, peanut meal, palm, palm kernel, olive meal, sunflower meal, etc. Oil bowl, coffee bowl, liquor bowl, beer bowl, fish bowl, mirin bowl, whiskey bowl, juice bowl, tofu bowl, soy sauce bowl, starch bowl, green tea bowl, black tea bowl, oolong tea bowl and the like.
Examples of the saccharide include granulated sugar, super white sugar, zara sugar, glucose, fructose, maltose, and lactose.
Examples of chemical products include potassium sulfate, sodium tetraborate decahydrate, sodium acetate, sodium bicarbonate, boric acid, caustic soda, slaked lime, quicklime, calcium carbonate, urea, calcium chloride, sodium chloride, ammonium chloride and the like.
Powder seasonings include sugar, salt, powder soy sauce, powdered miso, bonito extract powder, kelp extract powder, scallop extract powder, shiitake extract powder, crab extract powder, shrimp extract powder, eel extract powder, pork extract powder, beef extract powder, Examples include chicken extract powder, fruit powder, plum meat powder, and curry powder.
Examples of food additives include sodium L-aspartate, DL-alanine, L-arginine L-glutamate, potassium chloride, monopotassium citrate, tripotassium citrate, trisodium citrate, glycine, adipic acid, citric acid, Gluconodelta lactone, DL-tartaric acid, fumaric acid, monosodium fumarate, DL-malic acid, trehalose, aspartame, acesulfame potassium, xylitol, disodium glycyrrhizinate, saccharin, saccharin sodium, edible red No. 2, edible red No. 3, Food Red 40, Food Red 102, Food Yellow 4, Food Yellow 5, Food Green 3, Food Blue 1, Food Blue 2, Ethyl Vanillin, Vanillin, dl-Menthol, L-Ascorbic Acid, L -Isoleucine, calcium citrate, glyce Calcium phosphate, calcium gluconate, potassium carbonate, potassium sorbate, additives such as sodium alginate and / or formulations such as using thereof.
Examples of the powder processed food include powdered milk, juice, cocoa, coffee, tea, carrot, burdock, cabbage, spinach, powdered cheese and the like powdered.
Examples of spices include powdered spices such as chili, yam, pepper, turmeric, laurel, cinnamon, basil, and herbs.
Examples of cereals include rice, wheat, corn, barley, buckwheat, rye, rye wheat, sorghum, millet, millet, millet, pearl millet, millet, oat, senninkoku, quinoa and the like.
Examples of the beans include soybeans, peanuts, kidney beans, red beans, cowpeas, peas, mungbeans, broad beans, lentils, chickpeas, and beans.
Further, the anti-arching storage container 2 may be a silo for storing grains or the like, or may be a tank for storing other powders or granules.

  Air supply holes 5 are formed at intervals in the circumferential direction and the vertical direction of the side wall of the container body 2 ′ of the storage container 2 for preventing arcing, and the air nozzle 5 ′ is inserted into the air supply hole 5. ing. The air supply holes 5 are preferably formed at equal intervals in the circumferential direction and the vertical direction in order to eliminate arching formed at an indefinite position in the container body 2 '. In the present embodiment, the air supply holes 5 are formed at a total of 20 locations, 4 at regular intervals in the circumferential direction of the side wall of the container body 2 ′ and 5 at regular intervals in the vertical direction of the sidewall of the container body 2 ′. ing. The air supply hole 5 is not particularly limited, but can typically be formed in a circular shape having an inner diameter of 4 mm to 100 mm.

  The container body 2 ′ of the storage container 2 for preventing arcing is provided with a measuring unit 4 that measures the storage amount of the stored item 1. The measuring unit 4 is provided at a plurality of predetermined heights on the side surface of the container body 2 ′, and the measuring unit 4 measures the storage amount to which the stored material 1 is filled up to which position of the container body 2 ′. can do. Although the measurement part 4 is not specifically limited, For example, it may be formed with the sensor and may be formed with the window part so that it can measure by visual observation.

  The arching prevention storage container 2 has a hopper 11 and a discharge feeder 12 provided below the container main body 2 ′, and a storage discharge port 13 ′ is formed below the discharge feeder 12. The hopper 11 is attached when the diameter of the discharge feeder 12 and the diameter of the container body 2 ′ do not match, and has a function of matching the diameters and joining them together. The discharge feeder 12 has a function of smoothly discharging the stored item 1.

The anti-arching device 100 further includes an air supply device 10 that supplies air to the air supply hole 5 of the anti-arching storage container 2. The air supply device 10 includes an air tank 8 that stores air, a dryer 9 that dries air, and a compressor 9 ′ that compresses air. The air supply device 10 is provided with an air pipe 7 that is connected to an air nozzle 5 ′ inserted into a total of 20 air supply holes 5 and serves as an air flow path. The air supply device 10 of the arching prevention device 100 according to the present embodiment removes the moisture of the air compressed by the compressor 9 ′ with the dryer 9, stores it in the air tank 8, and enters the container body 2 ′ as necessary. Supply. The dry air typically has a pressure of 1 to 10 kgf / cm ² (0.09 to 0.98 MPa) and a humidity of 0 to 10%.

  The air supplied from the air supply device 10 is preferably dry air as described above, but is not limited to this, and air having a lower water content per unit volume than the stored matter in the container body 2 ′. I just need it.

  The anti-arching device 100 further includes an air adjustment valve 6 that adjusts the supply of air to the anti-arching storage container 2 in the middle of the air pipe 7. The air regulating valve 6 supplies air supplied to four air nozzles 5 ′ respectively inserted into four air supply holes 5 formed in the air pipe 7 in the circumferential direction at a predetermined height of the container body 2 ′. It is formed at a position that can be adjusted at once. The air regulating valve 6 opens the valve at a position where supply of air is necessary and supplies a necessary amount based on the position information of the stored matter obtained by the measuring unit 4, and at a position where supply of air is not necessary. Has a function of closing the air supply and stopping the supply of air.

  The anti-arching device 100 further has a dust collector 18, an exhaust fan 19, and an exhaust duct 20 formed above the stored material inlet 13. The stored product 1 scatters when the stored product is put into the arching preventing storage vessel 2 or when air is supplied to the air supply hole 5. At this time, the arching preventing storage vessel 2 is scattered outside. In order to suppress, it is preferable to collect the stored product 1. In the embodiment according to the present invention, this collection is performed by a dust collection unit including a dust collector 18 for collecting the scattered stored material 1, an exhaust fan 19 for sucking, and an exhaust duct 20 through which air passes. The pressure regulating valve 17 is configured to keep the pressure with the outside in equilibrium when the inside of the silo has a negative pressure.

  The anti-arching device 100 further includes a discharge gear 15, a discharge motor 14, and a belt cover 16 below a discharge feeder 12 having a rotating blade (not shown). Since the discharge gear 15 has a small torque at the rotation speed (1500 rpm) of the general-purpose motor (discharge motor 14) and cannot rotate the rotating blades to which pressure is applied, the rotation speed of the motor is reduced and the torque is increased. Used to turn the rotating blades. The belt cover 16 is a belt protective cover used to transmit the rotation of the discharge motor 14 to the discharge gear 15.

(Method of processing stored items using anti-arching device)
Next, the processing method of the stored goods 1 using the arching prevention apparatus 100 which concerns on the Example of this invention is demonstrated in detail using figures.
First, an anti-arching device 100 is prepared, and a predetermined amount of storage 1 is charged from a storage input 13 into a container body 2 ′ provided with a breathable sheet 3 along the inner surface of the side wall. Close the inlet 13.
On the other hand, in the air supply device 10, the air is compressed by the compressor 9 ′, the moisture of the compressed air is removed by the dryer 9 and stored in the air tank 8.
Subsequently, the measurement unit 4 that measures the storage amount of the stored item 1 confirms the position of the stored item 1 in the container body 2 ′, and the air from the air supply device 10 is provided at the site where the stored item 1 is provided. Is supplied from the air supply hole 5. At this time, the valve is opened at a position where air supply is required based on the position information of the stored matter obtained by the measuring unit 4 using the air adjustment valve 6 of the air pipe 7 through which the air from the air supply device 10 passes. Then, the required amount may be supplied, and the supply of air may be stopped by closing the valve at a position where supply of air is not necessary. Moreover, air may be supplied intermittently into the container body 2 ′ or may be supplied continuously.
The air supplied from the air supply hole 5 into the container main body 2 ′ passes through the gap between the sheet 3 and the container main body 2 ′ or the air permeable sheet 3, thereby diffusing the air from the air supply hole 5. By reaching far away, the storage 1 is dried over a wide range.
The exhaust fan 19 was turned and scattered together with the supply of the air or when the stored material 1 was put in front of the air to prevent the stored material 1 from scattering outside the storage container 2 for preventing arching if necessary. The stored material 1 is sucked through the dust collector 18, and the sucked stored material 1 is collected by the filter 18 ′ of the dust collector 18, and only air is exhausted through the exhaust duct 20.
When the stored item 1 stored in this way is discharged from the anti-arching device 100, the discharge motor 14 is operated. At this time, the rotation speed of the discharge motor 14 is reduced by the discharge gear 15 to increase the torque. Turn the rotating blade. In this way, the stored item 1 is scraped out by the rotary blade and discharged from the discharge feeder 12.

According to the processing method of the stored goods 1 using such an anti-arching device 100, since the air-permeable sheet 3 is provided along the inner surface of the side wall of the container body 2 ', air is supplied to the container body 2'. By supplying air from the supply hole 5, the air passes through the gap between the sheet 3 and the container main body 2 ′ or the air-permeable sheet 3, and thereby the air is diffused to a place away from the air supply hole 5. To reach. For this reason, the stored product 1 is dried over a wide range by air, and the occurrence of arching can be satisfactorily suppressed over a wide range in the container body 2 ′.
Furthermore, by supplying air from the air supply hole 5 to the container body 2 ′, the stored material 1 filled in the container body 2 ′ can be dried. It is no longer necessary to dry the storage 1 in advance, and the large equipment and space associated therewith are also unnecessary.
Furthermore, even if the moisture adjustment is not successful after filling and arching should occur, arching can be easily performed by supplying air from the air supply hole 5 to the container body 2 ′ again to dry the storage 1. It can be eliminated. Therefore, it is not necessary for the worker to manually break the arching, and he is freed from dangers such as a collapse accident and oxygen deficiency.

  Examples of the present invention are shown below, but these examples are provided for better understanding of the present invention and its advantages, and are not intended to limit the invention.

[Example 1]
(Examples 1-12)
(Test equipment)
As Examples 1 to 12 of the present invention, an anti-arching device 200 shown in FIG. 2 was prepared. FIG. 2 shows a schematic diagram of each component of the anti-arching device 200. The anti-arching device 200 is designed and simplified with a scale smaller than that actually used as an embodiment. Specifically, the anti-arching device 200 includes an anti-arching storage container 210 and an air supply device (not shown) that supplies air to the air supply holes 29 of the anti-arching storage container 210. The supplied air is dry air having a pressure of 0.4 MPa / cm ² and a humidity of 4%.
The anti-arching storage container 210 includes a storage body inlet 40 at the top, a storage outlet 40 'at the bottom, and a container body 21 having a plurality of air supply holes 29 formed so as to penetrate the side wall; And a breathable sheet 23 provided along the inner surface of the side wall of the container main body 21.
The container body 21 is an acrylic cylindrical tube having a cross-sectional radius of 6 cm and a height of 30 cm.
The air supply holes 29 are formed in a circular shape with an inner diameter of 4 mm (the outer diameter of the hose supplying air is 8 mm), and are 2 cm, 10 cm, and 18 cm from the bottom of the container body 21 at equal intervals in the circumferential direction. Are formed at 4 locations (3 × 4 = 12 locations in total).
The breathable sheet 23 is formed of a polyester cloth, and is fixedly provided along the entire inner surface of the container body 21.
An acrylic plate 22 on which a weight to be described later is placed is provided at the storage material input port 40 of the container body 21. The main purpose of the acrylic plate 22 is to hold and hold the upper part of the sheet 23 with the presser ring 24 and to hold the cylindrical tube 21 through the acrylic plate 22 ′ and all screw bolts 34. The acrylic plate 22 is perforated so that a load can be applied to the stored item. A plan view of the acrylic plate 22 is shown in FIG.
Below the container body 21 is provided an acrylic cylindrical tube 30 formed with rotating blades 32 for scraping the stored material to the stored material discharge port 40 '. A plan view of the cylindrical tube 30 is shown in FIG.
FIG. 5 shows a schematic diagram of a 920 g iron pedestal 37 and a 5 kg weight 38 for applying pressure to the stored product (wheat bran 39) by the test method described later.

(Test method)
First, the moisture content was measured before putting wheat bran 39 into the container body 21 of the arching prevention device 200. Next, as shown in FIG. 6, wheat bran 39 was introduced into the container body 21 of the arching prevention device 200. Since the sheet 23 is located between the wheat bran 39 and the container main body 21, the wheat bran 39 was not in direct contact with the inner surface of the container main body 21. In this embodiment, since the scale of the apparatus is small, arching does not occur due to the weight of the wheat bran 39. Therefore, in order to forcibly generate arching, pressure was applied by placing the pedestal 37 and the weight 38 on the wheat bran 39 filled in the container body 21.
Subsequently, dry air was intermittently supplied into the container body 21 from the air supply hole 29 under the conditions shown in Table 1 from an air supply device (not shown).
After 24 hours from the start of the dry air supply, the rotary blade 32 in the cylindrical tube 30 was rotated to scrape the wheat bran 39 from the stored product discharge port 40 ′. At this time, the presence or absence of arching was evaluated by observing the acrylic transparent container body 21. Further, the moisture content of the discharged wheat bran 39 was measured. The difference between the moisture content measured before the wheat bran 39 was charged and the moisture content at the time of discharging was determined, and the ratio (%) of the scattered moisture content was calculated.
The above test was performed several times at different dates. Table 1 shows the test conditions and test results.

(Comparative Examples 1-3)
As Comparative Examples 1 to 3, a test was performed using the same test apparatus as in Examples 1 to 12 except that the sheet 23 was not provided and dry air was not supplied.
The above test was performed several times at different dates. Test conditions and test results are shown in Table 2.

(Evaluation)
Examples 1-12 have at most 13.5% (Example 6) of moisture (%) at discharge, the average is 12.9% in Examples 1-7, and 13.2 in Examples 8-12. No occurrence of arching of wheat bran was observed in all cases.
In Comparative Examples 1 to 3, since the sheet 23 was not provided and air was not supplied, the moisture (%) at the time of discharge was all 14.7%, and in Comparative Examples 1 and 3, the moisture was absorbed. In both cases, the occurrence of arching was confirmed.

[Example 2]
(Examples 13 to 16)
(Test equipment)
As Examples 13 to 16 of the present invention, similarly to Example 1, an anti-arching device 200 shown in FIG. The supplied air is dry air having a pressure of 0.2 MPa / cm ² and a humidity of 7%. Further, as in Example 1, the iron base 37 and the weight 38 for applying pressure to the stored product (wheat bran 39) shown in FIG. 5 were 920 g and 5 kg, respectively.

(Test method)
First, the moisture content (A%) was measured before putting wheat bran 39 into the container body 21 of the arching prevention device 200. Next, as shown in FIG. 6, wheat bran 39 was introduced into the container body 21 of the arching prevention device 200. Since the sheet 23 is located between the wheat bran 39 and the container main body 21, the wheat bran 39 was not in direct contact with the inner surface of the container main body 21. In this embodiment, since the scale of the apparatus is small, arching does not occur due to the weight of the wheat bran 39. Therefore, in order to forcibly generate arching, pressure was applied by placing the pedestal 37 and the weight 38 on the wheat bran 39 filled in the container body 21.
Subsequently, dry air is supplied from an air supply device (not shown), air supply interval: 60 (seconds), air supply time / time: 0.5 (second / time), and air volume: 221 (l / h). Thus, the air was supplied from the air supply hole 29 into the container body 21 intermittently.
After 24 hours from the start of the supply of dry air (also referred to as after drying), the presence or absence of arching was evaluated by observing the acrylic transparent container body 21. Moreover, the moisture content (B%) of the wheat bran 39 near the air supply port after drying and the moisture content (C%) of the wheat bran 39 at a position away from the air supply port were measured. Furthermore, using these results, the difference in moisture content from before drying (D%, E%) and the moisture content from before drying (F%, G%) were calculated, respectively.
Note that “near the air supply port” is a region within 2 cm above and below the horizontal plane passing through the center of the air supply port at four locations in the circumferential direction, and “positions away from the air supply port” are at four locations in the circumferential direction. An area within 2 cm above and below the position 4 cm above the horizontal plane passing through the center of the air supply port.
The above test was performed several times at different dates. The test results are shown in Table 3.

(Comparative Examples 4-6)
As Comparative Examples 4 to 6, tests were performed under the same test conditions using the same test apparatus as in Examples 13 to 16 except that the sheet 23 was not provided.
The above test was performed several times at different dates. The test results are shown in Table 4.

(Evaluation)
In Examples 13 to 16, the moisture content after drying was small both in the vicinity of the air supply port and in the position removed from the air supply port, and the wheat bran was well dried over a wide range. Also, no wheat bran arching was observed.
In Comparative Examples 4 to 6, since the sheet 23 was not provided, the amount of moisture at the position outside the air supply port was particularly large, and the drying was local only in the vicinity of the air supply port. It was.
In addition, Example 1 and Example 2 were performed at different times (Example 1 is July, Example 2 is November), and the implementation environment such as indoor air temperature and humidity is different. It cannot be simply compared.

DESCRIPTION OF SYMBOLS 1 Storage 2 Storage container 2 for preventing arcing Container body 3 Sheet 4 Measuring part 5 Air supply hole 5 'Air nozzle 6 Air adjustment valve 7 Air piping 8 Air tank 9 Dryer 9' Compressor 10 Air supply device 11 Hopper 12 Discharge feeder 13 Storage input 13 'Storage discharge 14 Discharge motor 15 Discharge gear 16 Belt cover 17 Pressure regulating valve 18 Dust collector 18' Filter 19 Exhaust fan 20 Exhaust duct 21 Container body 22 Acrylic plate 22 'Acrylic plate 22 "Acrylic plate 23 Seat 24 Seat retaining ring 25 Nut 26 Washer 27 Screw 28 Nut 29 Air supply hole 30 Cylindrical tube 31 Loosening prevention nut 32 Rotor blade 33 Bolt 34 Full screw bolt 35 Washer 37 Base 38 Weight 39 Wheat bran 40 Store input 40 'Storage Discharge 100 storage container for arching protection device 200 arching protection device 210 arching prevention

Claims (13)

An anti-arching storage container that prevents arching by drying stored items with air,
A container body provided with a stored product inlet at the top, a stored product outlet at the bottom, and a plurality of air supply holes formed so as to penetrate the side wall;
A breathable sheet provided at a position corresponding to the air supply hole and continuously provided in the vertical direction of the inner surface of the side wall of the container body along the inner surface of the side wall of the container body ; ,
An anti-arching storage container. The storage container for arching prevention according to claim 1, wherein the sheet is provided along the entire inner surface of the side wall of the container body. The storage container for arching prevention according to claim 1 or 2 , wherein the stored product is powder or granules. The powder is any one of cereal flour, starch, feed, fertilizer, rice bran, sugar, chemicals, powder seasoning, food additive, powder processed food and spice,
The storage container for arching prevention according to claim 3 , wherein the granule is cereal or legume. The storage container for arching prevention according to any one of claims 1 to 4 , wherein the container is a silo or a tank. The storage container for arching prevention according to any one of claims 1 to 5 , wherein a plurality of air supply holes of the container body are formed at intervals in a circumferential direction and a vertical direction of a side wall of the container body. The sheet is
Vegetable fiber, including cotton and hemp
Animal fibers including silk, wool and cashmere,
Regenerated fibers including rayon and cupra,
Semi-synthetic fibers including acetate, triacetate and promix,
Synthetic fibers including nylon, polyester, acrylic, aramid, vinylon, vinylidene, polyvinyl chloride, polyethylene, polypropylene and polyurethane, and
The storage container for arching prevention according to any one of claims 1 to 6 , wherein the storage container is formed of at least one selected from the group consisting of inorganic fibers containing glass, carbon, metal, and ceramic. The storage container for arching prevention according to any one of claims 1 to 7 , wherein the container main body includes a measuring unit that measures a storage amount of a stored product. The storage container for arching prevention according to any one of claims 1 to 8 ,
An air supply device for supplying air to the air supply hole of the anti-arching storage container;
Anti-arching device with The anti-arching device according to claim 9 , wherein the air supplied from the air supply device is dry air. The anti-arching device according to claim 9 or 10 , further comprising an air adjustment valve that adjusts the supply of air to the anti-arching storage container. The arching prevention device according to any one of claims 9 to 11 , further comprising a dust collection unit that collects a stored item scattered outside the container. Charging a stored product into the container body;
Supplying the air from the air supply hole to the container body into which the stored material is charged, and drying the stored material with air that has passed through the sheet;
Method of processing food objects using the arching protection device according to any one of claims 9-12 including.

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