JPH0333706Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rotary feeder, and in particular, to an improvement of a rotary feeder with a structure that is effective in preventing the adhesion of powder and granules when used for transporting powder and granules. Regarding.

[Prior art] A rotary feeder conventionally used for transporting powder and granular materials has a rotating shaft passing through the housing.
A rotating shaft has multiple radial vanes planted on its outer circumferential surface. Materials such as pulverized coal are introduced from the inlet into the space partitioned between each vane, and discharged from the opposite side by the rotation of the rotor. It is rotated to the exit and discharged.

Conventionally, the rotor of this type of rotary feeder includes a rotating shaft and a vane integrally attached to the rotating shaft, with the outer edge of the vane serving as a sliding surface with the inner peripheral surface of the housing.

[Problems that the invention aims to solve] However, with conventional rotary feeders, if the powder or granules to be fed are sufficiently dry, they are transported smoothly, but if the powder or granules become moist, As the particles grow, they tend to adhere, and in particular, they grow from the corners of the vanes and the outer surface of the rotating shaft, causing the problem that the particles stick to the bottom of the rotor.
In such a case, the spatial volume of the rotor will be reduced, leading to a decrease in transport capacity, and a constant supply will not be achieved, resulting in an unstable transport state.

The present invention focused on the above-mentioned conventional problems, and developed a rotary rotor with a structure that prevents adhesion through a self-cleaning action and always maintains good transportation even when conveyed materials tend to aggregate and adhere to the rotor side. The purpose is to provide feeders.

[Means for Solving the Problems] The rotary feeder of the present invention includes a cylindrical housing having an inlet and an outlet for transporting objects, and a cylindrical housing extending in a radial direction with respect to the axis of the cylindrical housing. and a plurality of vanes rotatable in the circumferential direction about the axis of rotation, the rotary feeder being arranged coaxially with the axis of the cylindrical housing and fixed to the cylindrical housing. a supported central shaft; and a pair of rotary sleeves each rotatably fitted around the central shaft at both end sides of the vane in the axial direction of the cylindrical housing, and a rotation center of the vane. Both end portions of the vanes are fixed to the rotating sleeve, and the side portions of each vane on the rotation center side are in sliding contact with or close to the outer circumferential surface of the central shaft.

[Function] In the present invention, the central shaft of the rotor and the vanes are separated, and only the vanes can be rotated, so that the vanes scrape off the powder and granules adhering to the central shaft, thereby improving the supply effect. At the same time, since it performs a self-cleaning action, the internal volume does not decrease due to adhesion, and the performance does not deteriorate.

[Example] Examples of the rotary feeder according to the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show a rotary feeder according to an embodiment. This rotary feeder has a cylindrical housing 10, the upper end of which is formed with an inlet 12 connected to a powder supply side such as a hopper, and the lower end formed with an outlet port 12 connected to a transport pipe or the like. 14 is formed. A horizontally extending central shaft 16 passes through the center of the housing 10, and a powder transport chamber 17 is provided between the outer surface of the central shaft 16 and the inner surface of the housing 10.
It is said that This central shaft 16 is fixedly supported by the housing 10. Inside the transport chamber 17, vanes 18 made of a plurality of materials are arranged radially. The vane 18 is separate from the central shaft 16, and has its outer peripheral end face opposed to the inner peripheral face of the housing 10, and its inner peripheral end face in sliding contact with the outer peripheral face of the central shaft 16.

Further, in order to rotate the vane 18 in the transport chamber 17 while maintaining such a radial arrangement of the vane 18, a rotating sleeve is provided on the end surface of the vane in the direction along the rotation center line of the vane 18, that is, in the left-right direction in FIG. 20 is provided integrally with the vane. This concrete structure is shown in FIG.

As shown in FIG. 3, the rotating sleeve 20 consists of a front end sleeve 20A and a rear end sleeve 20B, which are arranged concentrically and separated by the width of the transport chamber 17, and the vanes 18 are arranged radially between them. This is what I did. The rotary sleeve 20 is configured to be able to rotate around the feeder center shaft 16 as a fixed axis, so that the outer surface of the feeder center shaft 16 can be seen from the through hole between the base end portions of the vanes 18. It's starting to come.

Note that the rotating sleeve 20 has its outer peripheral surface supported by a fixed sleeve 22 that protrudes from both end surfaces of the housing 10 via a bearing 24 . Further, a pulley 26 for transmitting rotational driving force is attached to the rear end sleeve 20B, and a belt 30 driven by a motor 28 is wound around the pulley 26 to rotate the rotary sleeve 20 and the vane 18.

In the rotary feeder configured in this way, the vane 18 is rotated by the driving force from the motor 28, and the powder introduced from the intake port 12 is transferred to the discharge port 1.
4. At this time, even if the powder is moist and highly adhesive, the vane 18 itself scrapes and removes the powder from the outer surface of the feeder center shaft 16.
Powder does not adhere to and remain on the outer surface (outer peripheral surface) of the central shaft 16. Therefore, vane 18
The space volume created between the housing 10 and the central axis 16 remains unchanged. There is no reduction in transportation capacity. As a result, fixed quantity supply is carried out at a high loading rate, and stable transportation can be achieved.

[Effects of the invention] As explained above, in the present invention, the central shaft and the vane are separated, and the central shaft is fixed so that the vanes rotate around it, so that the conveyance that adheres to the surface of the central shaft is removed. The material is scraped off by the vanes and has a self-cleaning effect, without reducing the transport space volume. Therefore, the excellent effect of being able to exhibit high transport capacity at all times is achieved.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a rotary feeder according to an embodiment, FIG. 2 is a sectional view of the same side, and FIG. 3 is a perspective view showing a vane mounting structure. 10...Feed housing, 12...Intake port, 14...Discharge port, 16...Feeder center axis,
18... Vane, 20... Rotating sleeve.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylindrical housing having an inlet and an outlet for transporting objects; and a cylindrical housing extending in a radial direction with respect to the axis of the cylindrical housing, with the axis being the center of rotation. A rotary feeder including a plurality of circumferentially rotatable vanes, comprising: a central shaft disposed coaxially with the axis of the cylindrical housing and fixedly supported with respect to the cylindrical housing; A pair of rotating sleeves are provided on both ends of the cylindrical housing in the axial direction, respectively, and are externally fitted so as to be rotatable relative to the central axis, and both ends of the vane on the rotational center side are respectively fitted to the rotating sleeves. 1. A rotary feeder, wherein the rotary feeder is fixedly fixed, and the side portion of each vane on the rotation center side is in sliding contact with or close to the outer circumferential surface of the central shaft.