JP2543602Y2 - Rotary valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary valve which can prevent the occurrence of biting of powder or the like and can change the cut-out amount arbitrarily.

[0002]

2. Description of the Related Art For example, in a powder supply apparatus, when a powder is supplied, it is necessary to cut off a differential pressure, so that a rotary valve is used to cut out the powder. .

However, in the conventional rotary valve, there is a problem that the powder having a large particle diameter may be caught in a gap between a partition plate provided radially from the rotor and the valve case to hinder smooth rotation of the rotor. was there. In addition, when the cutout amount is small, the inlet is made small to cope with it. However, since the inlet is small, there is a problem that a bridge is generated depending on the powder and cutout is impossible. Further, since the compartments divided by the partition plate have a constant capacity, when the processing capacity of the supply device is changed, it is necessary to replace the rotary valve with a compartment having a capacity of the corresponding capacity. In addition, there is a problem that a complicated replacement operation is forced and a loss time is generated.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and reliably prevents the powder from being caught between the partition plate and the valve case, thereby making the rotor smooth. A rotary valve that can maintain rotation and can change the capacity of the compartment only arbitrarily without replacing the entire rotary valve device and can accurately and widely correspond to the processing capacity of the supply device. It was completed for the purpose of doing.

[0005]

The rotary valve according to the present invention, which has been made to solve the above-mentioned problems, is divided into a plurality of compartments by partition plates provided radially from the rotor toward the valve case. In the rotary valve, a scratch plate that is in contact with a valve case is attached to a tip end of the partition plate, and a bent portion having an L-shaped cross section for closing a central portion of the compartment to reduce the capacity.
Having the scratch plate as a partition plate by the bent portion.
A lift plate fixed by pressing is attached.

[0006]

When such a rotary valve is used in the same manner as a conventional rotary valve, the bite of powder is reliably prevented by a scratch plate attached to the end of the partition plate so as to contact the valve case. In addition, a raised plate attached to the partition plate to close the center of the compartment and reduce the volume allows the amount of powder cut out to accurately correspond to the processing capacity of the supply device.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The drawing shows an example of a rotary valve installed at a lower part of a supply device. An inlet 2 for introducing a processing powder from the supply device is provided at an upper part of a valve case 1, and the powder is provided at a lower part. For example, a cutout 3 for cutting out a fixed amount into an air transport pipe or the like is provided. At the center of the valve case 1 is provided a rotor 4 which is connected to a drive source (not shown) and rotates at a predetermined rotation speed.
Six partitioning plates 5 projecting from each other and having six equal-capacity compartments 6
Are formed.

[0008] At the tip of the partition plate 5 is attached a scratch plate 7 which is in contact with the valve case 1 and closes the gap therebetween. This scratch plate 7
According to the type of powder supplied, for example, rubber is used to prevent biting of fine powder, and stainless steel is used if heat resistance and wear resistance are required. Thus, it is possible to correspond to various conditions.

The partition plate 5 is provided with a raising plate 8 for closing the central portion of the compartment 6 to reduce the capacity so as to correspond to the processing capacity of the supply device. The raising plate 8 has an L-shaped cross section and has a bent portion 9, and the bent portion 9 is fixed to the partition plate 5 by bolts or the like. Since the scratch plate 7 is pressed and fixed to the partition plate 5 by the bent portion 9, the fixing operation can be completed only once, and the raising plate 8 is attached as close to the valve case 1 as possible. This makes it possible to provide a sufficient range for changing the capacity of the compartment 6, particularly for adjusting the small capacity.

[0010] In the above-mentioned structure, the powder supplied by the supply device is introduced into the rotary valve from the inlet 2, and the powder is supplied from the cutout 3 by a fixed amount without being affected by the differential pressure. In the present invention, a scratch plate 7 is attached to the tip of the partition plate 5 to close the gap between the partition plate 5 and the valve case 1, so that the powder is cut out. Biting is reliably prevented, and smooth rotation of the rotor 4 can be maintained. In addition, since each compartment 6 is provided with a raising plate 8 and has a capacity accurately corresponding to the processing capacity of the supply device, stable quantitativeness can be maintained and the inlet 2 has a larger diameter than usual. Clogging of the powder in the lever portion can be reliably prevented.

When the processing capacity of the supply device is changed, the raising plate 8 is provided with another raising plate whose length, angle, etc. are designed in advance so that the capacity of the compartment 6 can correspond to the capacity. 8 and the position of the partition plate 5 can be easily shifted by simply changing the position of the rotary valve device. Etc. can be reduced, and no loss time occurs.

[0012]

As is apparent from the above description, according to the present invention, the powder can be reliably prevented from being caught between the partition plate and the valve case, and the smooth rotation of the rotor can be maintained. At the same time, it is possible to change the capacity of the compartment only arbitrarily without replacing the entire rotary valve device and to accurately and widely correspond to the processing capacity of the supply device, which is extremely excellent in workability. In addition to using only one kind of rotary valve, there is an advantage that it can be used without significant improvement over conventional rotary valves and has excellent economic efficiency. Therefore, the present invention has a very large practical value as a rotary valve that has eliminated the conventional problems.

[0013]

[Brief description of the drawings]

FIG. 1 is a cutaway front view showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve case 4 Rotor 5 Partition plate 6 Compartment room 7 Scratch plate 8 Raising plate 9 Bending part

Claims (1)

(57) [Scope of request for utility model registration] A plurality of compartments are formed by partition plates (5) provided radially from a rotor (4) toward a valve case (1).
In the rotary valve divided into (6), a scratch plate (7) that comes into contact with the valve case (1) is attached to the tip of the partition plate (5), and the partition chamber (6)
L-shaped cross section to reduce the capacity by blocking the center side of the
The bent portion (9) has a
Raise the plate (7) by pressing and fixing it to the partition plate (5).
A rotary valve having a plate (8) attached thereto.