JPS58216827A - Pneumatic conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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.

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.

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.

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.

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.

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.

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.

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.

[Brief explanation of the drawing]

Figure 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)

[Claims] (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.