JPH04298423A - Rotary feeder - Google Patents

Abstract

PURPOSE:To provide a rotary feeder device with which blowing up of grains are not caused when it is used for high pressure and high density pneumatic transportation of the grains, and in which a seal member can be replaced easily. CONSTITUTION:A seal cylinder 3 of a special structure is disposed at an upper part of a rotor 2 in a casing 1, the seal member 3 is tightly attached to the upper part of the rotor 2 by supply of compression air, and a press member 5 and an auxiliary cylindrical body 4 are engaged with the inner and outer circumference of the seal cylinder 3 at an upper part of the casing 1, so replacement of the seal cylinder 3 is facilitated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary feeder device for quantitatively feeding powder and granules into a transport pipe for transporting the powder and granules using compressed air, for example.

0002

[Prior Art and Problems] Conventionally commonly used rotary feeders have a gap between them and the casing body. When a rotary feeder device with such a gap is used as a powder supply device for pneumatic transport, the powder and granules are blown up from this gap together with compressed air, making it impossible to increase the pressure at the bottom of the rotary feeder. Furthermore, it is not possible to supply powder or granules in a fixed quantity, which limits the range of use, and there is a problem that it can only be used for pneumatic transportation at low pressure and low concentration. In addition, various efforts have been made to seal gaps so that they can be used for high-pressure, high-concentration pneumatic transportation, but the structure is extremely complicated, and when the seal needs to be replaced due to wear of the seal member, most rotary feeders The reality is that they are not used because they have problems such as having to disassemble everything and making maintenance difficult.

0003

[Purpose] The present invention has been developed in view of the above-mentioned problems, and even when used for high-pressure, high-concentration pneumatic transportation of powder and granules, the powder does not blow up, and the sealing member can be replaced extremely easily. The purpose of this invention is to provide a rotary feeder device that can

0004

[Means for Solving the Problem] In order to achieve the above object, the rotary feeder device of the present invention is provided with a seal cylinder of a special structure disposed above the rotor in a casing, and the seal cylinder is sealed by supplying compressed air. It is configured to fit tightly to the upper part of the rotor to ensure sealing, and a presser member and auxiliary cylinder are fitted to the inner and outer circumferences of the seal cylinder in the upper part of the casing and fixed to the casing with screws, and the seal cylinder is replaced. The present invention is characterized by a structure in which the casing, the auxiliary cylinder body, and the holding member can be easily separated, and the seal cylinder can be easily replaced.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A two-part casing 1 that has a rotor storage section in the center and a hollow section that passes through the top and bottom.
A rotor 2 is provided at the center of the rotor 2, and the rotor 2 has the following configuration. That is, casing 1
A rotating shaft 2A is provided passing through the central part of the casing 1 in the front and back directions.
The rotating shaft 2A is rotatably supported via the rotating shaft 2A, and two side discs 2C and 2C are fitted and fixed at an appropriate distance in the front and rear direction in the casing 1 at the rotating shaft 2A. At the same time, a large number of vanes 2D are provided radially between the two side disks 2C, 2C on the rotating shaft 2A, and the rotor 2 is constituted as a whole.

[0006] Also, the rotor 2 inside the casing 1
A seal cylinder 3 having the following structure is fitted into the upper hollow part of the cylinder. That is, the vertical cylinder part 3A has the same outer diameter as the inner diameter of the upper hollow part and has a height that slightly projects upward from the casing 1, and the vertical cylinder part 3A is integrally attached to the lower end of the vertical cylinder part 3A. the tip of the rotor 2
The seal cylinder 3 is constituted by an enlarged thick cylinder part 3C formed with a concave arc surface 3B that matches the circumferential surface of the side disks 2C and 2C. In addition, the wall thickness of the enlarged wall thickness cylinder part 3C is wider than the distance between the blade plates 2D and the blade plates 2D in FIG. Further, the vertical cylinder portion 3A in the seal cylinder 3
An auxiliary cylindrical body 4, which has upper and lower flanges 4A and 4B at the upper and lower ends of the cylindrical body and has an inner diameter that is the same as the outer diameter of the vertical cylindrical part 3A, protrudes upward from the casing 1. The lower flange 4B is fixed to the casing 1 with screws.

Furthermore, a presser member 5 is fitted and fixed by screws from the upper flange 4A of the auxiliary cylinder 4 to the inner surface of the vertical cylinder portion 3A of the seal cylinder 3. That is, the holding member 5 has an overall structure in which a member having a hook-shaped cross section is continuous in an annular shape, and the flat part is a flange part 5A, and the holding member 5 is in close contact with the upper flange 4A of the auxiliary cylinder 4, and is vertically connected. The surface part is attached to the vertical cylinder part 3A of the seal cylinder 3.
The holding member 4 as a whole is fixed by screws in slidable contact with the inner surface. An annular hollow chamber 6 is defined by the vertical inner surface of the auxiliary cylinder 4, the upper end surface of the vertical cylinder part 3A of the seal cylinder 3, and the presser member 5. Further, the hollow chamber 6 is communicated with a compressed air source via an air supply port 7 provided on the upper flange 4A of the auxiliary cylinder 4 and a pipe equipped with a pressure gauge and a pressure reducing valve (not shown). Note that the air supply port 7 may be provided in the pressing member 5.

To explain the operation of the device configured as described above, in the state shown in FIGS. 1 and 2, the hollow chamber 6 is communicated with a compressed air source (not shown) to supply pressure-adjusted compressed air to the hollow chamber 6. . As a result, the seal cylinder 3 is pressed downward in the direction of the rotor 2, and the concave arc surface 3B is pressed downward toward the rotor 2.
are in close contact with the side discs 2C, 2C and the blade plate 2D, respectively. In this state, by rotating the rotary shaft 2A by a motor (not shown), the rotor 2 is moved to the seal cylinder 3.
Due to the pressing contact between the side disks 2C, 2C and the blade plate 2D, the upper side of the casing 1 is completely sealed while rotating. Therefore, even if the lower side of the casing 1 is connected to a transport pipe for transporting high-pressure, high-concentration air and is used for supplying powder and granules, the only blow-up of powder from below will be due to the residual pressure in the pocket. . In addition, the powder supplied from above does not leak out in the left and right directions in FIG. 2 due to pressure contact between the concave arcuate surface 3B of the seal cylinder 3 and the two side disks 2C, 2C. Furthermore, if the seal cylinder 3 becomes worn and needs to be replaced, first remove the screws from the auxiliary cylinder 4 to separate the presser member 5, as shown in FIGS. After removing the screws from the casing 1 and separating them, the seal cylinder 3 is pulled out from the casing 1, and the replacement is completed by assembling the new seal cylinder 3, auxiliary cylinder body 4, and presser member 5 in this order.

[0009]

Effects of the Invention As is clear from the above description, the present invention has a structure in which compressed air is introduced into the hollow chamber during rotation of the rotor to press the concave arc surface of the seal cylinder against the side disks and vanes of the rotor. At the same time, the seal cylinder, auxiliary cylinder, and presser member that define the hollow chamber are configured to be easily separated and divided, so the rotor can be rotated in a completely sealed state with no gaps, allowing high pressure and high concentration. It can now be used as a powder feeder for pneumatic transport, and the seal cylinder can be replaced extremely easily, which has a significant effect.

[Brief explanation of the drawing]

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

FIG. 2 is a view taken along the line A-A in FIG. 1;

FIG. 3 is an exploded view showing a state in which the seal cylinder is removed from the state in FIG. 1;

FIG. 4 is an exploded view showing a state in which the seal cylinder is extracted from the state in FIG. 2;

[Explanation of symbols] 1 Casing 2 Rotor 3 Seal tube 3A Vertical cylinder part 3B Concave arc surface 3C Expanded thick part 4 Auxiliary barrel 5 Pressing member 6 Hollow chamber 7 Air supply port

Claims (1)

[Claims] Claim 1: A casing having a rotor housing in the center; a rotating shaft passing through the casing in the front and rear directions; a rotor having a plurality of vanes radially arranged between the two side disks of the rotating shaft; a vertical cylindrical portion having a length that projects from the rotor, and an enlarged thick cylindrical portion formed with a concave arcuate surface whose distal end surface coincides with the circumferential surface of the side disk of the rotor is connected to the lower end of the vertical cylindrical portion. a seal cylinder; an auxiliary cylinder fitted to the outside of a portion of the vertical cylinder that protrudes from the casing, and screwed to the upper part of the casing via a lower flange of flanges provided at the upper and lower ends; and; a cylindrical holding member with a flange attached to the upper end, the flange being attached in close contact with the upper flange upper part of the auxiliary cylinder, and the vertical surface being in contact with the inner surface of the vertical cylinder of the seal cylinder; a presser member that forms a hollow chamber with the auxiliary cylinder body and the seal cylinder; an air supply port that is provided in the auxiliary cylinder body or the presser member and communicates with a compressed air source via a pipe provided with a pressure reducing valve; A rotary feeder device comprising: and;