JPS58216827A - Pneumatic conveyor - Google Patents

Abstract

PURPOSE:To enable to securely convey a particulate material, by a method wherein a fluexible inner container capable of being bent in response to a negative pressure is provided in a container consisting of a rigid body in which a particulate material is contained, and the particulate material is drawn to the center of the container by bending the inner container. CONSTITUTION:The flexible inner container 10 formed of a rubber or the like is placed in close contact with the inside of the container 1 consisting of a rigid body, and a main body 2 of the container is provided with a plurality of communicating holes 11 for communicating a closed space formed between the container 1 and the inner container 10 to the atmosphere. When a particulate material P is fed into the container 1 through an ON-OFF valve 4 and thereafter the valve 4 is closed and air is blown in through an air blowing-in port 6, air flows through a conveying blowing port 2a and a conveying pipe 5, generating a negative pressure in the container 1. Consequently, the inner container 10 is collapsingly bent by the negative pressure and is drawn to a central part, so that the particulate material P is uniformly conveyed irrespectively of whether it is at the central part or a peripheral part of the interior of the container 1.

Description

【発明の詳細な説明】 この発明は、粉粒体の搬送に用いられる空気式搬送装置
、つｔｖは圧送式の空気コンベヤに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic conveying device used for conveying powder and granular materials, and tv refers to a pressure-feeding type pneumatic conveyor.

従来、粉粒体を搬送するための手段として圧送式（押出
式）の空気コンベヤがある。ＷＪ１図はその一例を示す
もので、２は略逆円錐形に形成され次剛体たる容器１の
本体、８は上面に開閉弁４を備え几カバー、６は容器本
体２の底部の輸送プロ一部２ａＫ接続された輸送管、６
は輸送プロ一部２ａに開口形成されたエア吹込口である
。そして、例えば粉体Ｐを開閉弁４ｔ−開いて容器１内
に投入し、該開閉弁４を閉じ几のちエア吹込口６からエ
アを吹き込むと、エアは輸送プローＷ５２　ａから輸送
管６を経て吐出口６ａへと高速で流れる。この時、容器
１内の空間に負圧が発生して容器１内の粉体ｐｈエアの
流れに沿って輸送プロ一部２　ａ　から輸送管６へと流
れ込み、吐出口５ａから連続的に吐出されることになる
。Conventionally, a pressure-feeding type (extrusion type) air conveyor has been used as a means for conveying powder and granular materials. Figure WJ1 shows an example of this, in which 2 is the main body of the container 1 which is formed into a substantially inverted conical shape and is a rigid body, 8 is a container cover with an on-off valve 4 on the top surface, and 6 is a transportation pro- cess at the bottom of the container main body 2. Part 2aK connected transport pipe, 6
is an air inlet formed in the transportation part 2a. Then, for example, when the powder P is introduced into the container 1 by opening the on-off valve 4t, and after closing the on-off valve 4, air is blown from the air blowing port 6, the air flows from the transport blower W52a through the transport pipe 6. It flows at high speed to the discharge port 6a. At this time, negative pressure is generated in the space inside the container 1, and the powder PH flows into the transport pipe 6 from the transporting part 2a along the flow of the powder ph air inside the container 1, and is continuously discharged from the discharge port 5a. will be done.

しかしながら、上記のような従来の空気コンベヤによれ
ば、容器の下部が逆円錐状に絞られて傾斜面となってい
る几め、粉体Ｐが粘性等のため罠上記の傾斜面でプリツ
ンヲ形成（ブロッキング）しやすい状態となり、したが
って輸送ブロー径り内つまりは容器１の中心部に位置し
ているものは比較的簡単に搬送されるものの、輸送ブロ
ー径ぶの外側つまりは容器１の外周寄りにあるものは前
記のブリッジ形成が障害となって思うように搬送できな
いという問題がある。However, according to the conventional air conveyor as described above, the lower part of the container is constricted into an inverted conical shape and forms an inclined surface, and the powder P is viscous and forms a trap on the inclined surface. Therefore, items located within the transport blow diameter, that is, at the center of the container 1, are transported relatively easily, but items located outside the transport blow diameter, that is, near the outer periphery of the container 1, are transported relatively easily. However, there is a problem in that the above-mentioned bridge formation becomes an obstacle and cannot be transported as desired.

この発明は以上のような点に鑑み、たとえ搬送物が多少
のブリッジを形成してい几としても確実に搬送できるよ
う圧した空気コンベヤを提供することを目的としてなさ
れたもので、この目的のため本発明圧おいては、容器内
に、エア吹き込みに基づく負圧に応じて撓み得るフレキ
シブルな内容器を配設して二重構造とした仁とを１！！
ｆ徴としている。In view of the above-mentioned points, the present invention has been made for the purpose of providing a pressurized air conveyor that can reliably convey objects even if they form some bridges. At the pressure of the present invention, a flexible inner container that can be bent in response to negative pressure caused by air blowing is provided inside the container to form a double structure. !
It is said to be a f symptom.

以下、この発明の冥雄側を従来例と同一部分には同一符
号を付して図面に基づき説明する。Hereinafter, the Meiko side of the present invention will be explained based on the drawings, with the same parts as those of the conventional example being given the same reference numerals.

すなわち、本発明においては第２図に示すように剛体か
らなる容器ｌの内側に、これに密着するようにゴム等か
ら彦るフレキシブルな内容器１０を装填するとともに、
容器１と内容器ｌＯとで画成される密閉空間を外気と連
通させるため容器本体２には複数（ただし、１個のみ図
示）の連通孔１１を形成しである。That is, in the present invention, as shown in FIG. 2, a flexible inner container 10 made of rubber or the like is loaded inside a container l made of a rigid body so as to fit tightly therein, and
A plurality of communication holes 11 (however, only one is shown) are formed in the container body 2 to communicate the closed space defined by the container 1 and the inner container 1O with the outside air.

以上の構成において、開閉弁４から容器１内に所定の搬
送物たる粉体Ｐｔ−投入し、開閉弁４ｔ−閉じて容器１
内を密閉状態としてからエア吹込口６からエア全欧き込
む。こうして容器１内にエアｌｘ吹き込まれると前述し
几ように容器１内に負圧力！生じることから、フレキシ
ブルな内容器１０はその負圧によってあたかも潰される
かの如く撓んで中央部へ引き寄せられ、これにより容器
ｌの外周寄りの粉体Ｐを中央部へ寄せる力が生ずること
になる。このため、前述したように搬送物たる粉体Ｐが
例えば多少の粘性を有していてブリッジ形成を起こして
いるような場合でも、前記の負圧力によりブリッジが破
壊され、容器１内の粉体Ｐは容器ｌ内の中央部にあろう
と外周部寄ｖＶｃあろうと満遍なく輸送ブロ一部２ａか
ら輸送管５を経て搬送される。In the above configuration, the powder Pt, which is a predetermined material to be transported, is introduced into the container 1 from the on-off valve 4, and the on-off valve 4t is closed.
After the inside is sealed, air is poured in from the air inlet 6. When air lx is blown into the container 1 in this way, negative pressure is created in the container 1 as described above! As a result, the flexible inner container 10 is bent and drawn toward the center by the negative pressure, as if crushed, and this generates a force that draws the powder P near the outer periphery of the container l toward the center. . Therefore, as described above, even if the powder P to be conveyed has some viscosity and forms a bridge, the bridge will be destroyed by the negative pressure, and the powder in the container 1 will be destroyed. P is evenly transported from the transport blower part 2a through the transport pipe 5, whether it is in the center of the container l or near the outer periphery.

以上のように本発明によれば、容器の内側にフレキシブ
ルな内容器を配して二重構造とし、エア吹込時の負圧を
利用して上記の内容器を撓ませるようにし几こと罠より
、容器内に収容された搬送物が容器内中央部に引き寄せ
られることから、搬送物が例えば粘性等のためにブリッ
ジを形成しているような場合にも確実に搬送できるとい
う効果がある。As described above, according to the present invention, a flexible inner container is arranged inside the container to form a double structure, and the inner container is deflected by using negative pressure when air is blown. Since the conveyed object housed in the container is drawn to the center of the container, there is an effect that even if the conveyed object forms a bridge due to viscosity, for example, it can be reliably conveyed.

【図面の簡単な説明】[Brief explanation of the drawing]

＠１図は従来の空気コンベヤの一例を示す一部破断説明
園、第２図線本発明に係る空気コンベヤの一実施例を示
す断面図である。 １・・・容器、２・・・容器本体、５・・・輸送管、６
・・・エア吹込口、１０・・・内容器、１１・・・連通
孔。 代理人　志　賀　富　士　弥諒ＡFigure 1 is a partially broken illustration showing an example of a conventional air conveyor, and Figure 2 is a sectional view showing an embodiment of the air conveyor according to the present invention. 1... Container, 2... Container body, 5... Transport pipe, 6
...Air inlet, 10...Inner container, 11...Communication hole. Agent Shiga Fuji Miryo A

Claims (1)

【特許請求の範囲】[Claims] （１）搬送物穴る粉粒体が収容される剛体製の容器に輸
送管を接続し、この輸送管にエアを吹き込むことによＶ
該エア吹き込みに基づく負圧で搬送物を輸送管内に吸い
込んで搬送するようにしｔ空気コンベヤにおいて、前記
容器の一部に孔をあけるとともに、核容器内に、負圧に
応じて撓み得る７レキシプルな内容器を配設して二重構
造としたことを特徴とする空気コンベヤ。(1) By connecting a transport pipe to a rigid container in which the powder or granular material with holes is stored, and blowing air into this transport pipe, the
In the air conveyor, a hole is made in a part of the container, and a hole is made in a part of the container, and a 7 lexiple member that can be bent in response to the negative pressure is placed in the nuclear container. An air conveyor characterized by having a double structure with an inner container.