JPH0680724U - Vertical screw conveyor screw - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent powder particles from falling through the gap between the inner surface of the outer cylinder of the screw conveyor that vertically conveys the particles upward and the outer edge of the screw blade. Provides fewer screws. [Structure] An outer peripheral edge portion of a screw blade 3 of a vertically arranged screw conveyor is provided with an upward side wall 4 spirally along the outer peripheral edge portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screw conveyor, and more particularly to a screw for a vertical screw conveyor that vertically conveys a conveyed product such as powder and granules.

[0002]

[Prior art]

 It is already well known that screw conveyors are mainly used for horizontal transportation of powders such as mills, sugars, grains, seeds, fertilizers, cements, limes and coals.

[0003]

[Problems to be solved by the device]

 When a screw conveyor, which is mainly used for horizontal transportation of powder and granules, is used for vertical transportation, when the conveyed product is a relatively heavy item such as grain powder, the screw blade should be inclined at about 30 degrees. Although it is possible to carry out tilted transportation by rotating at high speed, when attempting to vertically transport powder particles, it exists between the outer peripheral edge of the screw blade and the inner peripheral surface of the outer cylinder. Since there is a large amount of downward drop from the gap, the transport efficiency is extremely poor and there was a problem in practical application.

[0004]

[Means for solving problems]

 The present invention solves the above-mentioned problems, and in order to efficiently convey powder particles upward vertically, the present invention is provided at the outer peripheral edge portion of a vertically mounted screw blade and along the outer peripheral edge portion. That is, the upward side wall is spirally provided.

[0005]

[Action]

 When the conveyed product is vertically transferred from the lower part to the upper part, the conveyed product is conveyed while being rotationally pressed to the outer circumference of the screw blade by the rotating force of the screw. Since the side wall is provided in a spiral shape along the outer peripheral edge, the side wall receives the conveyed product, and the conveyed product is prevented from falling through the gap between the screw blade and the inner peripheral surface of the outer cylinder. Acts to prevent.

[0006]

【Example】

 Referring to the drawings shown as an embodiment of the present invention, FIG. 1 is a partial sectional front view showing a main part of a screw of the present invention, in which a screw-shaped screw blade 3 is provided on an outer periphery of a shaft portion 2. A screw 1 having a vertical axis is vertically installed, and an upward side wall 4 is attached spirally along the outer peripheral edge of the screw blade 3. An outer cylinder 5 covers the outer circumference of the screw 1.

As shown in FIG. 3, the screw 1 is integrally formed with a spiral screw blade 3 having a half pitch and occupying a half peripheral surface on an outer peripheral surface of a shaft portion 2 fitted to a core shaft 6. A split screen unit 8 made of hard synthetic resin is formed in the openings at both ends in the axial direction of the shaft portion 2 and has cutout surfaces 7, 7 extending over a semicircle starting from both ends of the pitch length of the screw blade, respectively. It is also possible to have a structure in which a plurality of them are sequentially inserted into the mandrel 6 and combined.

The side wall 4 is provided in an upward spiral shape along the outer peripheral edge of the screw blade 3 of the divided screw unit 8 constituting the screw 1.

If the pitch length of the screw blades 3 integrally formed on the outer peripheral surface of the shaft portion 2 is 1 pitch or less, it is omitted in the drawing, but for example, it is 3/4 pitch length or 1/2 pitch. It may be less than or equal to the length.

FIG. 2 shows an embodiment of a vertical screw conveyor using a screw according to the present invention, in which reference numeral 9 indicates an inlet of a conveyed product and 10 indicates an outlet.

[0011]

[Effect of device]

 According to the present invention, since the side wall 4 facing upward is spirally provided along the outer peripheral edge of the screw blade 3 which is vertically erected as described above, the screw is rotated so that the powder particles When transporting a transported body from the bottom to the upper side, even if the transported force is rotationally pressed to the outer peripheral edge of the screw blade by the rotational force of the screw, the side wall 4 causes the drop from the outer peripheral edge of the screw blade. Prevent. As a result, the amount of transported material that dropped downward from the gap existing between the outer peripheral edge of the screw blade and the inner peripheral surface of the outer cylinder was significantly reduced. Therefore, the granular material can be efficiently conveyed vertically from below to above.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing a main part of a screw.

FIG. 2 is a partially peeled front view of an example of a vertical screw conveyor using a screw.

FIG. 3 is a front view of a split screw unit.

FIG. 4 is a side view of the split screw unit.

[Explanation of symbols]

 1 screw 2 shaft part 3 screw blade 4 side wall 8 split screw unit

Claims (1)

[Scope of utility model registration request] 1. A screw for a vertical screw conveyor, characterized in that an upright side wall is provided spirally along an outer peripheral edge of an outer peripheral edge of a vertically extending screw blade. .