JP3024649U - Rotary valve for powder transfer - Google Patents

Abstract

(57) [Abstract] (Corrected) [Problem] It is possible to clean and remove the powder particles attached to the fins and side plates in the rotary valve without disassembling the rotary valve when transferring the particles. The object is to provide a rotary valve for transferring powder particles. SOLUTION: A rotor 5 in which rectangular fins 7 are radially arranged around a rotary shaft 6 and both ends of each fin 7 are fixed by side plates 8 is housed in a cylindrical casing 1.
The supply port 2 for the powder or granular material 3 is provided on the peripheral side wall of the cylindrical casing 1,
A discharge port 4 is provided on the opposite side, and a compressed air supply port 12 and an exhaust port 13 are provided on the peripheral side wall between the supply port 2 and the discharge port 4.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 TECHNICAL FIELD The present invention relates to a rotary valve for transferring powder and granules, which transfers the powder and granules between devices when they are mixed and molded.

[0002]

[Prior art]

 A conventional rotary valve is shown in FIG. (A) is a partial cross-sectional view of the rotary valve as viewed from the front, and (b) is a vertical cross-sectional view taken along the line YY of (a). The cylindrical casing 1 of the rotary valve is provided with a powdery material supply port 2 above and a powdery material discharge port 4 below, and a rotor 5 is fitted in the cylindrical casing 1 coaxially with the cylinder axis. ing. In the rotor 5, a plurality of fins 7 are radially arranged around the rotation shaft 6, and both side ends of each fin 7 are fixed to side plates 8. When the rotating shaft 6 is rotated by an electric motor (not shown), the granular material 3 supplied to the supply port 2 from above is transferred downward from the discharge port 4 through the space between the fins 7 adjacent to each other. To be done. At this time, the gap between the inner wall of the cylindrical casing 1 and the fin 7 is made as small as possible to maintain the pressure difference between the supply port 2 side and the discharge port 4 side, so that the powder particles 3 are transferred.

[0003]

[Problems to be solved by the device]

 The rotary valve is basically not suitable for transferring highly adherent particles 3 including those having hygroscopicity, and such particles 3 adhere to the surfaces of the fins 7 and the side plates 8. Reduce the transfer capability of the rotary valve and reduce its function. Therefore, it was necessary to clean it at regular intervals. The cleaning must be done by dismantling the rotary valve, in which case the sidewall 10 is opened, the rotor 5 is taken out and cleaned. After cleaning, assemble in reverse order. At the time of this cleaning work, there was a problem that the powder particles 3 attached to the rotor 5 were scattered and polluted the work place.

As a countermeasure against this, as shown by a curved line portion 9 shown by a dashed line in FIG. 2A, the base of the fin 7 is made shallow and the corners are rounded. The volume in the rotor 5 between the matching fins 7 and the fins 7 was reduced, the transfer capacity per one rotation of the rotor was reduced, and a large rotary valve was required to divide the transfer amount. Moreover, even if such a measure is taken, the adhered powdery or granular material 3 is not forcibly removed, and therefore the problem of adherence to the fins 7 still remains, and the ambient temperature, humidity, and other factors. In some cases, the effect could not be fully exerted. The present invention has been made in view of the above problems, and an object thereof is a powder capable of cleaning and removing powder particles attached to fins and side plates in a rotary valve without disassembling the rotary valve. The purpose is to provide a rotary valve for transferring particles.

[0005]

[Means for Solving the Problems]

 The rotary valve for transferring powder and granular material of the present invention has radial rectangular fins planted around the rotary shaft, and the rotor in which both ends of each fin are fixed by side plates is housed in a cylindrical casing. An inlet for powder and granules is provided on the peripheral side wall of the cylindrical casing, an outlet is provided on the opposite side, and an air inlet and an outlet for compressed air are provided on the peripheral side wall between the inlet and outlet. It is characterized by

[0006]

[Embodiment of device]

An embodiment of a rotary valve for transferring powder particles (hereinafter referred to as a rotary valve) of the present invention will be described with reference to FIG. 1, which is one embodiment of the present invention. In FIG. 1, (a) is a partial cross-sectional view of the rotary valve of the present invention seen from the front, and (b) is a vertical cross-sectional view taken along the line XX of (a). Between the supply port 2 and the discharge port 4 provided on the peripheral wall 11 of the casing 1, a compressed air supply port 12 and an exhaust port 13 are provided, and compressed air is sent from the supply port 12 into the rotor 5. As a result, a vortex flow due to the compressed air flow is generated in the space between the adjacent fins 7, and the powder particles 3 attached inside the rotor 5 are forcibly removed from the exhaust port 13. Then, if an intake device or a powder collection device is attached to the exhaust port 13, the powder particles will not scatter and contaminate the surroundings. The swirl blows the compressed air evenly on the fins 7 and the side plates 8 to remove the adhering powder particles 3. The pressure of the compressed air is preferably ^{0.5kg / m 2 ~3kg / m 2} .

Air supply ports 12 are provided near the side plates 8 on both sides, the axis of the air supply port 12 is inclined 5 to 30 degrees with respect to the surface of the side plate 8, and the exhaust ports 13 are supplied to both sides. If it is arranged almost in the middle of the mouth 12, a vortex is likely to be generated, and the powder particles 3 attached to the rotor 5 surrounded by the fins 7 and the side plates 8 can be forcibly removed more efficiently. At this time, if the diameter of the exhaust port 13 is too large with respect to the diameter of the air supply port 12, no eddy current will be generated. Preferably, the diameter of the air supply port 12 is 5 to 10 mm and the diameter of the exhaust port 13 is 25 to 40 mm. Further, as shown in FIG. 1 (b), the cross section of the rotor 5 can be partitioned into a square by the compressed air air supply port 12 and the exhaust port 13, and in such a relationship, the air supply port 12 Need only be provided in one place.

As described above, by sending compressed air into the rotor 5 through the air supply port 12 provided on the peripheral side wall of the cylindrical casing, a vortex flow is generated in the rotor, so that the powder adhered to the inner wall between the fins is generated. The granules are removed, the casing can be cleaned without disassembling, and the granules 3 can be forcibly removed regardless of the ambient temperature, humidity, and other conditions. There is no need for large rotary valves as in the past. Further, it is not necessary to disassemble the rotor 5 for cleaning. Further, even when the rotary valve is in operation, the compressed air is sent into the rotor 5 so that the rotor 5 can be cleaned, which contributes to the improvement of the operation rate. Further, in order to improve the releasability of the granular material, it is preferable that the material of the fins 7 and the side plates 8 is stainless steel, or a fluororesin layer may be provided on the surface.

[0009]

【Example】

The granular material 3 was continuously supplied from the supply port 2 above the rotary valve and transferred. After continuous operation for 24 hours, compressed air was supplied from both air supply ports 12 into the rotor at a pressure of 2.0 kg / m ² in order to clean the rotor 5 while continuing to transfer the powdery or granular material 3. At this time, the diameters of the air supply port 12 and the exhaust port 13 are 8 mm and 30 mm, respectively, and the inclination angle of the air supply port 12 with respect to the surface of the side plate 8 is 20 degrees. As a result, the granular material 3 could be removed without disassembling the rotary valve, and the adhesion and growth of the granular material 3 on the rotor 5 could be prevented.

[0010]

[Effect of device]

 By using the rotary valve of the present invention, a vortex can be generated in the rotor, cleaning can be performed without disassembling the device, and adhesion and growth of powder particles on the rotor can be prevented. did it. Therefore, it greatly contributed to the improvement of work efficiency and work environment.

[Brief description of drawings]

1 shows an embodiment of a rotary valve of the present invention, (a) is a partial sectional view thereof, (b) is XX of (a).
It is a vertical cross-sectional view taken along the arrow.

2A and 2B show a conventional rotary valve, in which FIG. 2A is a partial cross-sectional view thereof, and FIG. 2B is a vertical cross-sectional view taken along the line YY of FIG.

[Explanation of symbols]

 1. Cylindrical casing, 2. Supply port, 3. Granules, 4. Discharge port, 5. Rotor, 6. Rotating shaft, 7. Fin, 8. Side plate, 9. Curved part, 10. Side wall, 11. Casing wall, 12. Air inlet, 13. Air outlet.

Claims (1)

[Scope of utility model registration request] 1. A rotor in which rectangular fins are radially planted around a rotary shaft and both ends of each fin are fixed by side plates is housed in a cylindrical casing, and a powder is formed on a peripheral side wall of the cylindrical casing. A granular material transfer characterized in that a supply port for granules is provided with an exhaust port on the opposite side, and an air supply port and an exhaust port for compressed air are provided on the peripheral side wall between the supply port and the exhaust port. Rotary valve.