JP2005270827A - Method for cleaning composite vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for cleaning a composite vessel to be used for containing or transporting various kinds of liquid or powdery body in a state of containing a synthetic resin inner vessel inside an outer vessel like a drum, capable of cleaning dust like iron powder stuck to an inner wall of the inner container in a short time with a low cost, preventing mixing of the content with dust. <P>SOLUTION: In this cleaning method, a vessel opening 5 of the composite vessel 1 containing the synthetic resin inner vessel 3 inside the outer vessel, is sealed, air is sent into the sealed vessel by a destaticization air gun 9 jetting ionized air, and dust is eliminated by an air filter to take out air from an air discharge port 10 to the outside. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a composite container used for storing and transporting various liquids and powders in a state where an inner container made of a synthetic resin is housed inside an outer container such as a drum can, and the like, such as iron powder stuck to the inner wall of the inner container It relates to cleaning to remove dust and dust.

When storing and transporting various liquids using a bottomed cylindrical container such as a drum can, it has a diameter approximately the same as the inner diameter of an outer container such as a drum can whose bottom is closed at the bottom. When a synthetic resin bottomed inner container is inserted into a drum can to form a composite container, and various liquids and fluids are stored in the inner container of the composite container, the inner wall of the drum can as an outer container is stored. Thus, various liquids and fluids can be stored and transported without being contaminated and without being mixed with the liquid or dirt previously attached to the inner wall. (For example, Patent Document 1, Patent Document 2, and Patent Document 3).
JP 2001-270564 A JP 2002-347839 A JP 2004-35062 A

  By the way, the mounting of these synthetic resin inner containers to the outer containers is often performed at the manufacturing locations of the outer containers such as drums, and these locations are iron powder generated during the manufacturing process of metal drums and the like. Or dust such as paint powder generated when polishing the paint on the drum can be generated and drifted in the air, and these dust and dust adhere to the surface of the inner container.

  When storing fluids such as various liquids and powders in these composite containers as they are, dust and dust are mixed as impurities in these stored items, and the quality of the stored items may deteriorate. This is not suitable for storing liquids and powders that require purity.

  For this reason, dust and dust can be removed from the inner container surface before storing these items in the composite container, but the inner container is made of synthetic resin, and static electricity is easily generated on the surface. Is strongly adsorbed and cannot be easily eliminated.

  In order to completely remove these strongly adsorbed dust and dust, the inside of the container must be washed with water, but this washing equipment and a drying step after washing are necessary, resulting in high costs.

  Therefore, the object of the present invention is to stick to the inner wall of the inner container in a composite container used for storing and transporting various liquids and powders in a state where the inner container made of synthetic resin is housed inside the outer container such as a drum can. It is an object of the present invention to provide a method for cleaning a composite container that can clean dust and dust such as iron powder in a low cost and in a short time and does not mix stored items with dust and dust.

  In order to solve the above-described problems, the present invention provides an electrostatic removal device that seals the container opening of a composite container containing an inner container made of synthetic resin inside the outer container and injects ionized air into the sealed container. A composite container cleaning method is characterized in that air is fed by an air gun and air is taken out while removing dust and dirt with an air filter.

  Here, the static electricity removal air gun that ionizes and sprays air is mainly used for static electricity removal of electronic parts and precision parts, and targets air containing positive and negative charged ions. The static electricity generated on the object is removed by charge exchange by spraying on the object, and the static electricity generated on the surface of the inner container made of synthetic resin is instantly removed using this ionized air. At the same time, the dust adhering to the surface is blown away by air pressure.

  The air containing dust and dust blown off is led out from the inside of the sealed container through the air filter, and the dust and dust are removed by the air filter and are not adsorbed on the inner container surface again.

  According to the present invention, dust and dirt stuck to the inner container surface inside the composite container can be instantly removed by the static electricity removing air gun, so that dust and dust are mixed as impurities in the stored items stored in the composite container. The quality of stored items will not be degraded by.

  In addition, an expensive cleaning facility using water for removing dust and dust and a cleaning / drying process are not required, thereby reducing facility cost and manufacturing time.

  Furthermore, since air in the sealed container containing dust and dirt removed from the inner container surface by the injection of ionized air goes out through the air filter, the dust and dirt are removed at the air filter part, The air is not polluted with dust or dust.

  Hereinafter, the cleaning method of the composite container of this invention is demonstrated based on FIG.1 and FIG.2 of an accompanying drawing.

  In FIG. 1, a composite container 1 is composed of a metal drum 2 as an outer container and a flexible inner container 3 made of an inner synthetic resin.

  The drum 2 has a cylindrical shape having a size appropriately determined by the standard, and has a lower end (upper side in the figure) sealed with a bottom plate 4 and an opening 5 with an upper end (lower side in the figure) opened. After storing the stored item, the opening 5 is closed with a cover plate as appropriate.

  The inner container 3 is generally formed of a synthetic resin such as polyethylene into a cylindrical body by an insulation method, and this cylindrical body is used as a side member of the inner bag, and a circular bottom surface member made of synthetic resin is also used at one end. Are joined together by welding or the like, and stored in the drum can 2 as a cylinder having a circular bottom surface and a top opening having substantially the same shape as the drum can 2, or one end of the cylindrical body is sealed linearly After being sealed, the drum can be spread in the drum can 2 and integrated with the drum can 2 by a well-known appropriate means such as making the bottom portion wrinkle and closely contacting the inner wall of the drum can 2.

  The composite container 1 is placed on the base 6 so that the composite container 1 is turned upside down so that the truncated cone-shaped filter storage portion 7 enters the opening 5.

  At this time, the peripheral edge of the opening 5 of the drum can 2 is brought into contact with the rubber 8 disposed in a ring shape around the filter storage portion 7 of the base 6, and the weight of the composite container 1 is used to make this contact. The rubber 8 is pressed to act as a packing that blocks air from the outside, and the inside of the composite container 1 is sealed.

  In this state, ionized air indicated by arrows in the figure is ejected from the static electricity removing air gun 9 disposed upward in the center of the upper surface of the filter housing portion 7. In addition, a well-known thing can be used for the supply apparatus of ionized air, and the injection apparatus of air.

  The ionized air is jetted upward from the static electricity removing air gun 9 as shown by the arrow in the figure, collides with the bottom surface of the inner container 3, spreads to the periphery of the bottom surface, and further descends along the side wall on the side surface of the inner container. After passing through an opening opened by appropriate means (such as a mesh or slit) on the side surface of the filter storage unit 7, the air is guided into the filter storage unit 7, and dust and dust are removed through the filter. It is discharged outside the table 6.

  As described above, convection of ionized air as shown by arrows is generated in the sealed composite container 1 by the ejection of ionized air from the static electricity removing air gun 9 and the discharge of air from the air discharge port 10. Reaches the entire bottom and side surfaces of the inner container 3 and removes the dust and dirt adsorbed on the inner container surface by static electricity while removing the static electricity on the inner container surface, and removes it by the filter of the filter storage unit 7. Dust and dust are removed.

  FIG. 2 shows another embodiment of the cleaning method of the present invention. The drum can 2 as the outer container of the composite container 1 and the inner container 3 inside are the same as those in FIG. Is omitted.

  The composite container 1 is turned upside down, the peripheral edge of the opening 5 of the drum can 2 is brought into contact with the rubber 8 on the base 6, and the rubber 8 is pressed using the weight of the composite container 1. 1 is the same as that of the example of FIG. 1 in this example. However, in this example, a cylindrical shape slightly smaller than the size of the composite container 1 is provided inside the rubber 8. A plurality of air discharge ports 12 are provided at appropriate intervals between the protrusion 11 of the base 6 and the rubber 8.

  A static electricity removing air gun 9 is accommodated in the convex portion 11, and ionized air sprayed from the static electricity removing air gun is blown out from the center of the upper surface of the convex portion 11 and protrudes from the inner wall of the inner container 3 as shown by the arrows in the figure. The air is discharged to the outside through a filter (not shown) after passing through an air outlet 12 provided in the base 6 through a gap with the outer surface of the portion 11.

  According to this embodiment, there is a condition that the size of the convex portion 11 is slightly smaller than the size of the composite container 1, and the versatility of applying to various size containers is lost, but the size is standardized. No problem with drums or pail cans.

  Further, the passage of ionized air is a gap between the inner wall of the inner container 3 and the outer surface of the convex portion 11, and the ionized air is forced near the inner wall of the inner container 3 as compared with the method using convection in FIG. 1. Therefore, the dust and dust removal efficiency with respect to the ejection amount of the ionized air is increased.

  Further, the entire convex portion 11 can be moved up and down with respect to the base 6, and the composite container 1 is placed in a state where the convex portion 11 is lowered below the base 6. If the cleaning operation is performed by moving up and the convex portion 11 is lowered after the operation is completed, the convex portion 11 does not get in the way when the composite container 1 is placed on or removed from the base 6, and the work efficiency is improved. improves.

  In addition, the cleaning apparatus used for the cleaning method of this invention is not limited to the thing of FIG.1 and FIG.2, A various form is applicable.

  For example, the static electricity removal air gun can be moved and moved in an airtight container so that the ionized air spreads over the entire inner wall, or the ionized air moves in a spiral shape within the cylindrical inner wall with the air gun facing diagonally upward. It is also possible to remove dust and dust.

  Further, the outer container of the composite container to which the cleaning method of the present invention can be applied is not limited to the metal drum can or the pail can shown in the figure, and various things such as a plastic container and a paper container can be applied. In short, it can be applied to all composite containers in which dust or dirt is adsorbed by static electricity generated in the inner container.

Front sectional drawing which shows an example of the cleaning method of the composite container of this invention. Front sectional drawing which shows the other example of the cleaning method of the composite container of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Composite container 2 Drum can 3 Inner container 4 Bottom plate 5 Opening part 6 Base 7 Filter storage part 8 Rubber 9 Static electricity removal air gun 10 Air exhaust port 11 Convex part 12 Air exhaust port

Claims (1)

The container opening of a composite container containing an inner container made of synthetic resin is sealed inside the outer container, and air is sent in by the static electricity removal air gun that injects ionized air into the sealed container, and dust and A method for cleaning a composite container, wherein the air is taken out while removing water.

Images