Conveying mechanism for powder and granular material processing equipment

Abstract

To provide a conveying mechanism of a powder and granular material processing facility for enhancing conveying efficiency, by restraining sticking and staying and a backflow of a powder and granular material being a conveying object inside the conveying mechanism.SOLUTION: The conveying mechanism 2 of the powder and granular material processing facility 1 includes at least one horizontal rotary shaft 21 arranged in the horizontal direction, a predetermined screw blade 22 pivotally supported by the horizontal rotary shaft 21, and a casing 23 covering the entire circumference and the entire length of the screw blade 22. The screw blade 22 is a three thread blade processed into a tapered shape that gradually decreases in width from the upstream side toward the downstream side.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a conveying mechanism for powder and granular material processing equipment. [Background technology]

[0002] BACKGROUND ART Conventionally, various screw conveyor mechanisms (corresponding to the conveying mechanism of the present application) for conveying powder or granular material have been proposed (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-26453 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned screw conveyor mechanism is a screw conveyor mechanism in which measures such as forming notches on the periphery of the screw blades are taken to prevent highly adhesive transported materials from adhering to the inner wall of the casing, piling up and solidifying, lifting the screw shaft, increasing torque, and otherwise deteriorating transport efficiency.

[0005] Unlike the screw conveyor mechanism described above, the conveying mechanism of the present application is designed to convey relatively non-adhesive materials such as wheat flour. However, some materials may still adhere to and remain on the screw blades or the inner wall of the casing, or the materials may flow backward, thereby deteriorating the conveying efficiency.

[0006] Therefore, the objective of the present invention was to provide a conveying mechanism for powder and granular material processing equipment that prevents the powder and granular material being conveyed from adhering, remaining, or flowing backward inside the conveying mechanism, thereby improving conveying efficiency. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a conveying mechanism that is arranged as part of powder and granular material processing equipment, and that is composed of a single horizontal rotating shaft arranged horizontally, a specified screw blade journaled on the horizontal rotating shaft, and a specified casing that covers the entire circumference and length of the screw blade, and that is characterized in that the outer diameter of the screw blade is tapered so that it gradually narrows from the upstream side to the downstream side in the length direction of the screw blade.

[0008] In order to solve the above-mentioned problems, the present invention further provides a conveying mechanism in which the inner diameter of the casing is tapered so that it gradually narrows from the upstream side to the downstream side in the longitudinal direction of the screw blade along the outer diameter of the screw blade.

[0009] In order to solve the above-mentioned problems, the present invention further provides a conveying mechanism in which the screw blade is a triple-bladed screw blade. [Effects of the Invention]

[0010] The conveying mechanism of the present invention is a conveying mechanism installed as part of powder and granular material processing equipment, and is composed of a single horizontal rotating shaft installed horizontally, a predetermined screw blade journaled on the horizontal rotating shaft, and a predetermined casing covering the entire circumference and length of the screw blade. The outer diameter of the screw blade is tapered, gradually narrowing from the upstream side to the downstream side in the length direction of the screw blade, and this structure creates a material seal to prevent the powder and granular material being conveyed from flowing backward. In addition, because the powder and granular material is compressed, it is conveyed efficiently and smoothly, and the conveying time is shortened.

[0011] Furthermore, the conveying mechanism of the present invention further has a tapered shape in which the inner diameter of the casing gradually narrows along the outer diameter of the screw blade from the upstream side to the downstream side in the length direction of the screw blade, thereby achieving even greater conveying efficiency.

[0012] Furthermore, the conveying mechanism of the present invention is further configured such that the screw blade has three blades, making it possible to convey a larger amount of powder or granular material. [Brief explanation of the drawings]

[0013] [Figure 1] Figure 1 is an external view showing the overall configuration of powder and granular material processing equipment. [Figure 2] FIG. 2 is a cross-sectional view of the transport mechanism. [Figure 3] Figure 3 is an external view showing the overall length and outer diameter of the screw blades. [Figure 4] Figure 4 is a right side view (upstream side) showing the outer diameter of the screw blade. [Figure 5] Figure 5 is a left side view (downstream side) showing the outer diameter of the screw blade. [Figure 6] Figure 6 is an image showing the state when bagged wheat flour A is placed at the supply port. [Figure 7] Figure 7 is an image showing flour A falling due to gravity from inside the bag. [Figure 8] Figure 8 is an image showing the state when bagged wheat flour B is placed at the supply port. [Figure 9] Figure 9 is an image showing flour B falling from the bag due to gravity. [Figure 10] Figure 10 is an image showing how flour A and flour B are mixed inside the storage container. [Figure 11] Figure 11 is an image diagram showing the wheat flour conveying operation. [Figure 12] Figure 12 is an image diagram showing the wheat flour conveying operation. DETAILED DESCRIPTION OF THE INVENTION

[0014] It is implemented as a conveying mechanism for powder processing equipment that mixes multiple types of flour. [Example]

[0015] First, the configuration of the powder and granular material processing equipment will be described with reference to FIGS. 1 to 5, 6 and 8.

[0016] The powder and granular material processing equipment (1) includes at least a predetermined conveying mechanism (2) disposed at the lowest level of the equipment, a powder and granular material storage container (3) that discharges and supplies powder and granular material upstream of the conveying mechanism (near the center of the lowest level shown in Figure 1), and a supply port (4) for supplying powder and granular material to the storage container (Figure 1).

[0017] The conveying mechanism (2) is composed of a horizontally disposed horizontal rotating shaft (21), a spiral screw blade (22) mounted vertically to the horizontal rotating shaft and supported by the horizontal rotating shaft, and a specified casing (23) that covers the entire circumference and length of the screw blade (Figure 2).

[0018] The diameter and shape of the horizontal rotating shaft (21) are a general rotating shaft having a generally cylindrical shape with the same diameter from the upstream side to the downstream side (FIG. 2).

[0019] The outer diameter of the screw blade (22) is processed so that the outer diameter (φ2) on the downstream side is smaller than the outer diameter (φ1) on the upstream side, and the width of the blade is tapered from the upstream side to the downstream side (Figures 3 to 5).

[0020] The total length (L1) of the screw blades (22) is 720 mm, with three 240 mm long screw blades arranged horizontally without any joints or steps (Fig. 3).

[0021] In this embodiment, the total length (L1) of the screw blade (22) is 720 mm, but this length can be increased or decreased depending on the conveying capacity. The same applies to the outer diameter.

[0022] The pitch of the screw blades (22) is 240 pitch, and the screw blades are three-row.

[0023] The inner diameter of the casing (23) is formed so that the inner diameter (φ4) on the downstream side is smaller than the inner diameter (φ3) on the upstream side, and the casing (23) has a tapered shape that narrows in width to fit the screw blades (22) (Figure 2).

[0024] The gap between the inner diameter of the casing (23) and the outer diameter of the screw blade (22) must be 1.0 mm or less to allow for backflow of the transported material and material sealing.

[0025] The storage container (3) may be any container capable of storing a certain amount of powder or granular material for a certain period of time.

[0026] An inner door is provided at the supply port (4) to prevent the powder from scattering around the facility (FIGS. 6 and 8).

[0027] The powder and granular material processing equipment (1) of this application is acceptable to be any powder and granular material processing equipment (for example, processing equipment for non-edible powder and granular materials) that processes the powder and granular material supplied to the equipment, such as equipment that supplies multiple types of powder and granular materials, mixes them, and discharges them, as well as equipment that supplies one or multiple types of powder and granular material, mixes or stirs them, and discharges them.

[0028] Next, the operation of the powder / granular material processing equipment will be described with reference to FIGS.

[0029] Packed wheat flour A is supplied from the supply port (4) (FIGS. 6 and 7).

[0030] Thereafter, the packed wheat flour B is supplied from the supply port (4) (FIGS. 8 and 9).

[0031] When the multiple types of flour A and flour B supplied from the supply port (4) are transported and supplied into the storage container (3), they are mixed by a first stirring blade arranged vertically to the storage container and a second stirring blade arranged at an angle from the bottom of the storage container to the side (Figure 10).

[0032] Thereafter, the wheat flour (W) is discharged and supplied from the lower direction of the storage container (3) to the space between the casing on the upstream side of the conveying mechanism (2) and the screw blade (22) (FIG. 11).

[0033] The wheat flour (W) supplied to the upstream side of the conveying mechanism (2) is guided to the screw blade (22) which rotates together with the horizontal rotation shaft, and is sequentially conveyed to the downstream side of the space between the casing and the screw blade (22) (in the direction of the arrow in Figure 12).

[0034] Since the conveying mechanism (2) has the structure of the present invention, the wheat flour as the conveyed object is conveyed from the upstream side to the downstream side with high efficiency and smoothness.

[0035] In this embodiment, the conveying mechanism is described as being arranged as part of powder and granular material processing equipment that stirs and processes powder and granular material, but the present invention is not limited to this and may be any conveying mechanism that is arranged as part of powder and granular material processing equipment that performs some type of processing such as stirring or mixing powder and granular material. [Industrial Applicability]

[0036] The present invention is an excellent conveying mechanism that creates a material seal to prevent the powder or granular material being conveyed from flowing backward, and therefore has industrial applicability. [Explanation of symbols]

[0037] 1 Powder processing equipment 2. Transport mechanism 21 Horizontal rotation axis 22 screw blade 23 Casing 3. Storage container 4. Storage container supply port L1 Screw flight length φ1 Outer diameter of screw blade (upstream side) φ2 Outer diameter of screw blade (downstream side) φ3 Casing inner diameter (upstream side) φ4 Casing inner diameter (downstream side) W Flour conveyed by screw blades

Claims

1. A conveying mechanism provided as part of powder and granular material processing equipment, One horizontal rotation shaft (21) disposed horizontally; A predetermined screw blade (22) journaled on the horizontal rotation shaft; A predetermined casing (23) that covers the entire circumference and entire length of the screw blade; It consists of A conveying mechanism characterized in that the outer diameter of the screw blade is tapered so that the width gradually decreases from the upstream side to the downstream side in the longitudinal direction of the screw blade.

2. 2. The conveying mechanism according to claim 1, wherein the inner diameter of the casing is tapered along the outer diameter of the screw blade so as to gradually decrease in width from the upstream side to the downstream side in the length direction of the screw blade.

3. 3. The conveying mechanism according to claim 1, wherein the screw blade (22) is a three-bladed blade.

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