JP2618310B2 - How to transport powder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transporting powders such as granular milk, fine powdered titanium oxide and coarse resin by pipes.

[0002]

2. Description of the Related Art Conventionally, for example, a piston cylinder device has been used.
The filling material is suctioned and collected, and the piston cylinder device
Filled material sampled by suction was switched by the flow path switching valve
Filling machine of the type that is directed to containers such as cans through a flow path
`` Holds the filling that the piston cylinder device sucks and collects.
The flow path between the tank and piston cylinder device
The state where the piston is in
Fix the interlocking device to continue the discharge process halfway
Between the piston of the hydraulic cylinder device and the valve element of the flow path switching valve
Metering delivery device in filling machine characterized by interposition
The device is known from Japanese Patent Publication No. 54-142789.
It has become.

[0003]

However, this device
In the case of the
Cope with accidents such as getting in between
Because there was no special mechanism
If the contaminants are abrasion-resistant, etc.
This damages the sliding part of the cylinder with the piston
That may cause fatal trouble to the whole equipment
There was a title.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a powder supply unit, a transport pipe, and a cylinder having a piston slidably mounted therein are connected to each other to first connect the powder supply unit with the cylinder and transport the pipe. By retracting the piston with the valve closed, a certain amount of powder is sucked into the cylinder from the powder supply unit, and then the cylinder and the transport pipe are connected, and the piston is advanced with the powder supply unit closed. Then, the powder in the cylinder is sent out into the transport pipe, and by repeating these steps, the powder in the transport pipe is gradually advanced, and the piston has a vent hole.
To remove foreign matter that has entered the sliding part with the cylinder.
Of powder, characterized in that
Offering transportation methods to solve these problems
Things.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. First, FIGS. 1 and 2 show a first embodiment. In the drawing, reference numeral 1 denotes a hopper with a bridge preventing housing powder 2, reference numeral 3 denotes a transport pipe, reference numeral 4 denotes a cylinder, and reference numeral 5 denotes a piston slidably mounted in the cylinder 4. The hopper 1, the transport pipe 3, and the cylinder 4 are connected, and a ball valve 6 is interposed at the connection portion. The piston 5 is reciprocally movable by the rotating plate 7 and the link 8. As shown in FIG. 1, when the piston 5 is retracted, the hopper 1 and the cylinder 4 communicate with each other through the openings 9 and 10 of the ball valve 6. The transport pipe 3 is in a closed state. In this state, the powder 2 falling from the hopper 1 is sucked into the cylinder 4 while the piston 5 retreats. When the piston 5 reaches the retreat limit, the ball valve 6 rotates, and as shown in FIG. 2, the cylinder 4 and the transport pipe 3 communicate with each other through the openings 9 and 11 of the ball valve 6, and the hopper 1 closes. State. In this state, the piston 5 advances again, and a certain amount of the powder 2 in the cylinder 4 is sent out into the transport pipe 3. Thereafter, the above process is repeatedly performed, and the powder 2 gradually advances in the transport pipe 3. The transport pipe 3 has a tapered shape in which the inner diameter gradually increases toward the front to prevent the powder 2 from being clogged. Also, powder 2 is contained in transport pipe 3.
A sufficient amount of air is also supplied to the extent that air is lifted. Soshi
The piston 5 is provided with a vent hole 12 for sliding with the cylinder 4.
Vacuum removes contaminants entering moving parts from outside
It is supposed to. FIG. 3 shows a second embodiment. This is such that powder is supplied from a storage container 15 through a flexible suction hose 16 instead of the hopper 1 described above.

[0006]

The method for transporting powder according to the present invention is described above.
As shown in the figure, and the piston gradually removes the powder in the pipe.
Since the air can be sent at a low speed, the air consumption is significantly reduced (1/50 of the pressure-feeding type, 1/10 of the plug transport) and the power consumption is significantly reduced (the pressure-feeding type). 1/5, 1/2 of the plug transport) are those cost reduction is brought about, also recovery device such as a cyclone also becomes unnecessary space can be saved and Do Ri, also powder is separated by the specific gravity and the particle size or, if the transport pipe as the physical properties of the powder described in example not only that there is no adverse effect such as to be destroyed in a tapered shape is advantageous in that clogging of the powder can be prevented as a matter of course However, in particular, in the present invention, the mixing difference between the powder that has entered the sliding portion of the piston and the cylinder.
I tried to remove things by vacuum, so this
Even if such foreign matter is abrasion resistant,
Elimination will damage the inside of the cylinder and the piston
And maintain smooth operation of the piston
The present invention thus addresses the aforementioned problems.
The effect is that the points can be sufficiently eliminated.
You.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which a piston sucks powder into a cylinder in a first embodiment.

FIG. 2 is a cross-sectional view showing a state in which a piston sends out powder into a transport pipe in the first embodiment.

FIG. 3 is a sectional view showing a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hopper 2 Powder 3 Transport pipe 4 Cylinder 5 Piston 6 Ball valve 7 Rotating plate 8 Link 9, 10, 11 Opening 12 Vent hole 15 Storage container 16 Suction hose

Claims (1)

(57) [Claims] 1. A powder supply unit, a transport pipe, and a cylinder having a piston slidably mounted therein are connected to each other. First, the cylinder is communicated with the powder supply unit and the piston is closed with the transport pipe closed. By retracting, a certain amount of powder is sucked into the cylinder from the powder supply unit, and then the cylinder and the transport pipe are communicated with each other, and the powder in the cylinder is advanced by moving the piston forward with the powder supply unit closed. sending the body into the transport pipe, so as to gradually advance the powder in the transport pipe by repeatedly performing these stroke
And a ventilation hole is provided in the piston to allow sliding with the cylinder.
Vacuum removes foreign matter that has entered moving parts
A method for transporting powder, characterized in that: