JPH0630095U - container - Google Patents

Abstract

(57) [Summary] [Purpose] In a container that stores and conveys powder,
Efficiently conveys and discharges powder without causing blockage. [Structure] An airtight woven fabric is installed on at least the outer surface of the container, preferably at an angle larger than the repose angle of the powder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a container for storing, transporting and completely discharging powder. In particular, the container of the present invention is suitable for storing, transporting, and completely discharging fine powder having strong adhesion and cohesiveness.

[0002]

[Prior art]

 As a container for storing and transporting powder, cloth bags, which are commonly called FIBC, and a container for storing and transporting metal powder are used, but they store fine powder with strong adhesion and aggregation. During transportation, problems such as dust generation of fine powder and blockage of discharge port due to adhesion occur. For this reason, when storing and transporting fine powder with strong adhesion and cohesiveness, the mainstream is to use a paper bag, or to transport it in granules in bulk and to store it in silo. Aside from the case of transporting in the form of granules, there is almost no means for storing and transporting fine powder, particularly ultrafine powder of the order of millimicron.

[0003]

[Problems to be solved by the device]

 Paper bags are not suitable for large-scale storage / transportation due to their durability, and are inefficient. When a metal powder storage and transportation container is used, the fine powder, especially the ultrafine powder on the order of millimicrons, has a large angle of repose, so the powder adheres to the inner surface of the container and blocks the powder discharge port. . For this reason, it was necessary to frequently vibrate the outside of the container or to perform a troublesome operation such as tapping during powder transfer. Therefore, an object of the present invention is to provide a container for storing / transporting powder which does not cause blockage when discharging the powder and has a significantly high discharging effect.

[0004]

[Means for Solving the Problems]

 The inventors of the present invention have earnestly studied the improvement of the inner surface of the container in order to achieve the above object, and arrived at the present invention. That is, the present invention is a container for storing and transporting powder, characterized in that a rigid or quasi-rigid container having a funnel-shaped outer shell at the bottom is provided with an airtight woven cloth at least on the inner surface of the outer shell. .

[0005]

[Action]

 According to the present invention, since the woven cloth having airtightness is installed in a state like a trampoline on at least the outer surface of the container, the powder is appropriately shaken at the time of discharging and does not adhere to the container. Also, it is completely discharged without blocking the discharge port.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the container. In FIG. 1, reference numeral 1 is an outer shell having a discharge port 2. The outlet 2 is normally opened and closed by a valve 3 such as a butterfly valve. 4 is the straight body part of the container. In the present invention, a woven cloth 5 having airtightness is installed on at least the outer surface of the container. The woven cloth 5 is installed inside the container in a state like a trampoline. As the woven cloth having airtightness, a completely non-porous woven cloth is preferable, and various cloths are used in consideration of durability, chemical resistance and washability.

As such a woven fabric, a woven fabric such as nylon cloth, polyester cloth or the like coated with urethane, acrylic, silicone or the like, a product obtained by sandwiching these sheets in a sandwich structure inside the woven cloth, etc. Can be illustrated. Although these woven fabrics are used depending on the properties of the powder to be handled, they are usually used in a thickness of 0.1 to 5 mm.

In the present invention, the woven cloth is installed at least on the inner surface of the outer shell of the container. When installed on the outer shell 1, the angle β formed by the horizontal surface of the woven cloth in FIG. 1 is the repose angle α of the powder. It is desirable to make it larger. When the woven cloth is installed on the straight body section 4, it is desirable that the angle δ formed by the woven cloth with the horizontal plane in FIG. 1 be larger than the angle γ formed by the horizontal plane of the straight body section. The effect is more remarkable when the woven cloth is provided on both the outer shell 1 and the straight body part 4. Further, the woven fabric provided on the outer shell 1 and the woven fabric provided on the straight body part 4 may be the same or different.

Reference numeral 6 denotes a protrusion provided on the straight body portion, but the shape of the protrusion is not particularly limited as long as the woven fabric is formed so as to satisfy the above-mentioned angle condition. Usually, it is convenient to provide a flange on the upper part of the straight body and tighten the flange and the outer lid 7 of the container with bolts through a sealant or the like. Reference numeral 8 is an inlet for putting powder.

Reference numeral 9 denotes a nozzle, which can enhance the trampoline effect of the powder by blowing a fluid such as compressed air from the nozzle when the powder is carried out. Although four nozzles are illustrated in the figure, the number of nozzles may be appropriately changed and used depending on the properties of the powder.

Examples of the powder applied to the container of the present invention include various powders such as carbon powder, titanium oxide powder, zinc stearate powder, various catalyst powders and food powders such as wheat flour. It is also possible to apply to ultrafine powder of the order of millimicrons.

The size of the container of the present invention is not particularly limited, and various sizes are manufactured according to various uses, but most of them are about 1 m ↑ 3 to 3 m ↑ 3.

As the material of the container, in addition to rigid materials such as iron and stainless steel, semi-rigid materials such as plastic and glass are also used.

In the container of the present invention, the powder is charged through the charging port 8, stored, and conveyed by opening the valve 3. At that time, by introducing compressed air or the like from the nozzle 9, it can be more efficiently transported and discharged.

The container of the present invention is usually used as a single container, but by using the inlet 8, the outlet 2 and the like, another device such as a damper, a rotary valve, a screw feeder, various kinds of joints and a chute can be used. It can also be used in combination. At that time, if air-tight woven cloth is also provided on the inner surfaces of the damper, the rotary valve, etc., the carrying effect is further enhanced.

[Effect of device]

 According to the present invention, it is possible to provide a container for storing and transporting powder having an airtight woven fabric provided on the inner surface. According to this container, the powder does not adhere and block inside, so that the powder can be efficiently conveyed and discharged. In addition, since the woven cloth is airtight, it is easy to wash, and there is little risk of contamination even when handling different types of powder.

[Brief description of drawings]

FIG. 1 is a sectional view of a container according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer shell having a discharge port, 2 ... Discharge port, 3 ... Valve, 4 ... Straight body part, 5 ... Woven fabric, 6 ... Protrusion, 7 ... Outer lid, 8 ... Input port, 9
…nozzle

Claims (1)

[Scope of utility model registration request] 1. A container for storing and transporting powder, comprising: a rigid or semi-rigid container having a funnel-shaped outer shell at a lower portion thereof, wherein an airtight woven cloth is provided at least on an inner surface of the outer shell.