JPS6172130A - Impeller for bucket elevator of continuous unloader - Google Patents

Abstract

PURPOSE:To improve excavation performance, by a method wherein an engaging part between a sprocket and a chain is protected by a disc, the front in the direction of rotation of an impeller is open, plural sets of excavating blades are provided, and a chute is located to an inner end. CONSTITUTION:When a bulky material is unloaded through front excavation of a bucket elevator 1, the bulky material, falling in from sides, is prevented from cutting through an engaging part between a chain 2 and a sprocket 6 by means of a disc 7a. The sprocket 6 is reliably protected, and the bulky material is scooped in blades through rotation of an impeller 7 rotated integrally with the sprocket 6. The bulky material is guided to the bucket side through between the ribs of the sprocket 6 from holes formed in the disc 7a by means of a chute 8. This reduces resistance produced due to contact with the bulky material, and enables improvement of excavation performance.

Description

DETAILED DESCRIPTION OF THE INVENTION (Related Industrial Field) The present invention relates to an impeller for excavation installed at the tip of a bucket elevator of a continuous unloader.

(Prior Art) Conventionally, the impeller in this type of bucket elevator simply digs loose material and is not efficient for use as an unloader.

(Problems to be Solved by the Invention) In view of the above, the present invention aims to improve the excavation capacity by guiding the loose material that collapses from the side to the packet side when excavating in the side direction of the bucket elevator. An object of the present invention is to provide an impeller for excavation that enables a gradual reduction in movement resistance.

(Means for Solving the Problems of the Invention) The gist of the present invention to achieve the above object is to provide a set of sprockets on both sides of the lower end of a post of a bucket elevator for a continuous unloader, and to equip the sprockets concentrically on the outside thereof. In the excavation impeller, the excavation impeller includes a disc that protects an engagement portion between the sprocket and the chain.

The front portion of the disk is opened in the radial direction on the impeller rotation direction side,
The invention is characterized in that it is comprised of a plurality of sets of digging blades formed in the shape of a pocket whose rear portions are closed, and a chute that opens between the ribs of the sprocket is formed at the inner end of the digging blade.

(Embodiment) To explain the embodiment shown in the drawings below, "■ is a bucket elevator, which includes a chain 2 wound around sprockets arranged above and below, and a large number of dokukerato 3 attached to the chain 2. Reference numeral 4 denotes a post of this bucket elevator, and a sprocket shaft 5 is rotatably supported at the lower end of the post so as to be able to rotate once. On both sides of the sprocket 5, there are a pair of left and right driven sprockets 6,
An impeller 7 for excavation is rotatably mounted on the outside thereof. One impeller 7 is attached to a boss rotatably fitted to the sprocket shaft 5, and includes a disk 7a that protects the engagement portion with the chain 2 and the driven sprocket 6, and the disk 7a.
At least three plate members 7b forming a plurality of pocket-shaped excavation blades whose front portions facing the impeller rotary blade are open and whose rear portions are closed in the radial direction of the impeller.

7c and 7d, the inner end of the pocket-shaped excavation blade is opened between the ribs of the conventional sprocket 6 through a hole drilled in the one circular plate 7a, and the armpit part is connected to the plate material 7c. The chute 8'' having an inclination angle of 3 is reliably guided to the packet side.

The plate material 7b constituting a part of the impeller 7 is formed with a relief angle h<, which is perpendicular to the tangential direction of the impeller, to reduce excavation resistance when the bucket elevator 1 excavates while moving forward. This is designed to improve excavability and reduce wear on the plate material 7b.

, , ,X, For the same purpose, a clearance angle of: J, tj, 2 is formed in the plate material 7C with respect to the vertical direction, and the excavation resistance when the bucket elevator 1 excavates while moving laterally. This is to reduce wear on the plate material 7c.

Furthermore, in this excavation impeller 7, the pocket-shaped excavation blade is excavated based on the relationship between the rotational speed of the impeller 7 and the lateral advancement speed when the bucket elevator 1 excavates while moving laterally. The width should be sufficient for the excavation width per blade.

(Operation of Jl! Light) The structure of the present invention is as described above, and the operation will be explained first.

Now, when unloading bulk materials by excavating the front surface of the bucket elevator 1, the loose materials collapsing from the side are prevented from being caught in the engagement part between the chain 2 and the sprocket 6 by the disc 7a, and the sprocket By rotating the impeller 7, which rotates in unison with the sprocket 6, the loose material scooped into the impeller is transferred to the sprocket 6 from a hole drilled in the disk 7a via the chute 8. The action of guiding it toward the packet side through between the ribs is performed.

In addition, when unloading bulk materials by side excavation, the side excavation blades, which are composed of at least three plate materials 7b, 7c, and 7d with sufficient width for the excavation width per piece, are used. Make sure to excavate the loose material on the side and chute 8.
The action of guiding the sprocket to the packet side through the hole made in the disc 7a and between the ribs of the sprocket 6 is performed.

(Effects of the Invention) Since the present invention has the structure and operation described in detail above, during excavation, regardless of whether the front or side of the elevator is excavated, the relief angle formed on the excavation blade prevents contact with bulk materials. This not only reduces resistance and improves excavation performance, but also reduces wear on the excavation blades, while ensuring that the excavated bulk material is guided to the packet side, improving unloader efficiency. Extremely effective.

In the embodiments shown in FIGS. 3 to 5, the plate material 7b is formed by a combination of straight plates, but it may also be formed by a combination of curved plates as shown in FIGS. 6 to 8. It has the same effect.

Further, in the embodiment, the tips of the teeth of the digging blades are aligned with the outer edge of the chain/sprocket protection disc 7b, but the tips of the blades may also protrude from the disc 7a.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view during front excavation. FIG. 2 is a front view of FIG. 1. Figure 3 is a side view of the impeller. FIG. 4 is a front sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a sectional view of the tip of the impeller shown in FIG. 3. FIG. 6 is a side view of an impeller in which the plate material 7b is composed of a combination of curved plates. FIG. 7 is a front sectional view taken along the line ■-■ in FIG. 6. FIG. 8 shows a sectional view of the tip of the impeller shown in FIG. 6. In the figure: l Bucket elevator 2 Chain 3 Packet 4 Boss 1-5 Sprocket shaft 6 Driven sprocket 7 Excavation impeller 7a FI
l, Plate 7b, 7c, 7d Plate material 8 Chute and above Applicant Sumitomo Heavy Industries, Ltd. sub-agent Patent attorney Isamu Ohashi Figure 1 Figure 2 Figure 8 Figure 7b Figure 7

Claims (1)

[Claims] A bucket elevator for a continuous unloader has a pair of left and right sprockets installed on both sides of the lower end of the post, and an excavation impeller installed concentrically with the sprockets on the outside of the sprockets. a disc that protects the engagement part with the disc, and a plurality of sets of excavation blades formed in a pocket shape with the front part open in the radial direction of the disc and the rear part closed, An impeller for a bucket elevator of a continuous unloader, characterized in that a chute opening between the ribs of the sprocket is formed at an inner end of the excavating blade.