JP2000318824A - Discharge guide structure for screw feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge guide structure for a screw feeder in which bulk material will not be bitten or scattered outward. SOLUTION: A discharge port 20 of a casing of a screw feeder is opened in a width from a first position (1) close to a paddle end edge when a paddle surface is faced in a bulk material discharge direction on the side where a discharge paddle 6d during rotation gets closer to the discharge port 20 to a second position (2) between a position where the paddle surface of the discharge paddle 6d is parallel to the bulk material discharge direction and a position where the paddle surface is on the back to the bulk material discharge direction on the side where it gets farther from the discharge port 20 as seen to a rotation axis as a boundary, and a guide cover 30 comprises a first side cover 31 disposed in a perpendicular direction to the paddle surface at the first position (1), and a second side cover 32 set to get in contact with a discharge side edge at the second position (2), and disposed in parallel to the first side cover 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a discharge guide structure for a screw feeder. More specifically, the present invention relates to an unloader for unloading bulk materials such as coal and grains from a hold, and to an improvement in a discharge guide structure for feeding bulk materials from a screw feeder to a vertical transport unit.

[0002]

2. Description of the Related Art FIG. 3 shows a vertical transport section and a screw feeder in an unloader. At the lower end of the vertical transport section 4 of the unloader, a screw feeder 6 serving as a scrap removing section is attached. The screw feeder 6 incorporates a screw 6b in a cylindrical screw casing 6a. The screw 6b has a helical screw blade attached to a rotating shaft, and a discharge paddle 6d is provided at an upper end of the screw 6b. Is installed. In the screw casing 6a beside the discharge paddle 6d, a discharge port 20 for sending loose materials to the receiving portion 5 is formed. The loose objects picked up by the screw 6b are splashed outward in the radial direction by the discharge paddle 6d, and are discharged from the discharge port 20.

As shown in FIG. 4, in the receiving portion 5, an upper tail pulley 7a and a lower tail pulley 7b of a drum shape are attached vertically, and an upper belt 8a circulating in the vertical transport portion 4 is mounted on the upper tail pulley 7a. The lower belt 8b that is wrapped around and circulates in the vertical transport unit 4 on the lower tail pulley 7b
Is wound around, and the two belts 8a and 8b are transported in the vertical transport unit 4 with loose objects sandwiched therebetween. The portion where the two belts 8a and 8b sandwich the loose material is the receiving portion 5. The receiving portion 5 receives loose materials discharged from the outlet of the screw feeder 6, but the guide cover 50 covers the loose materials released at this time so as not to be scattered.
0 is configured as follows.

In the prior art I shown in FIG. 5, the guide cover is composed of two left and right side covers 51 and 52, which are attached to a discharge port 50 which is opened with a width substantially equal to the width of the screw casing 6a. And are located parallel to each other. Each of the side covers 51 and 52 has a wide rubber plate sandwiched between the mounting plate and the liner and is stopped. The lower and upper edges of the rubber plate are in contact with the belts 8a and 8b while scattering loose objects. To prevent it. However, in this conventional example I, since most of the release trajectory of the loose objects splashed by the discharge paddle is directed to one side cover 52, the loose objects are largely splashed to one side cover 52 side, and one side Transported in a state where it is moved to
For this reason, loose objects are often caught in the ears of the two belts 8a and 8b in the vertical transport unit, and the surfaces of the belts 8a and 8b are often damaged by the caught loose objects. There is also a problem that the transport belt tends to meander when ascending in the vertical transport section. In order to solve the above-mentioned problem, in the conventional example II shown in FIG.
However, in the conventional example II, the tip 53 of the side cover 52 on one side intersects at a large angle with respect to the direction in which the loose material is released. There is a problem of scattering.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a screw feeder discharge guide structure which prevents loose objects from being caught and does not scatter outside.

[0006]

According to a first aspect of the present invention, there is provided a discharge guide structure for a screw feeder, wherein a cylindrical casing, a rotary shaft provided at the center of the casing, and a loose object mounted on the rotary shaft. A screw, a discharge paddle attached to the upper end of the screw and for splashing loose objects outward in the radial direction, and a guide cover for guiding the loose objects released by being splashed so as not to be scattered. In the screw feeder provided, the casing includes:
A discharge port through which loose objects pass is formed at a position facing the discharge paddle, and the discharge port has a paddle surface on a side where the rotating discharge paddle approaches the discharge port when viewed from the rotation axis. From the first position near the paddle edge when facing the bulk release direction, a position where the paddle surface is parallel to the bulk release direction and a position where the paddle surface is rearward in the bulk release direction on the side away from the outlet. And the guide cover is arranged in a direction perpendicular to the paddle surface at the first position, the guide cover being brought into contact with the discharge port side edge at the first position. It is characterized by comprising a first side cover and a second side cover which is brought into contact with the discharge side edge at the second position and is arranged in parallel with the first side cover.

According to the first aspect of the present invention, since the discharge paddle moves closer to the discharge port, the area of the discharge port is large, so that loose objects can be easily guided, and the first side cover is parallel to the loose object discharge trajectory. Since there is no loose object hitting the first side cover, there is no possibility that the loose object leaks from below. Also, on the side where the discharge paddle is going away from the discharge port,
Since the second side cover is shifted inward, the intersection angle between the loose object splashed by the discharge paddle and the release trajectory is so small that the loose object does not protrude from the lower edge of the side cover. In addition, since the second side cover is located near the center, the loose objects are collected substantially at the center of the two belts, so that the problem that the loose objects bite into the ears of the belt does not occur.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a loose object guide structure according to an embodiment of the present invention, and FIG. 2 is a view taken along line II-II of FIG.

Referring to FIGS. 1 and 2, the outlet 20 formed in the screw casing 6a is opened as follows. That is, when viewed from the rotation axis 6e of the screw feeder 6, the rotating discharge paddle 6d
On the side approaching the discharge port 20, the paddle surface of the discharge paddle 6d faces away from the first position near the paddle edge when the paddle surface faces the loose substance discharge direction, and on the side away from the discharge port. And a paddle surface is opened with a width up to a second position between a position where the paddle surface is rearward in the loose object discharge direction. In other words, the first position is a position having substantially the same width as the screw casing 6a, and is a position close to the screw shaft 6e at the second position at which the operation of returning the loose object is completed and the screw is returned to the inside of the screw casing. .

The guide cover 30 has a first side cover 31 and a second side cover 32. The first side cover 31 is brought into contact with the discharge port side edge 21 at the first position, and is disposed in a direction perpendicular to the paddle surface of the discharge paddle 6d at the first position. Further, the second side cover 32 is brought into contact with the side edge of the outlet at the second position, and is arranged in parallel with the first side cover 31. Each of the side covers 31, 32 has a wide rubber plate 31a, 32a sandwiched between outer mounting plates 31b, 32b and inner liners 31c, 32c. The side shape may be basically the same as the conventional side guide 50 shown in FIG. The upper and lower sides of the side covers 31 and 32 come into contact with the upper belt 8a and the lower belt 8b, and scattering of loose objects is prevented by the belts 8a and 8b.
In a portion between the screw casing 6 and the belts 8a and 8b, an upper cover 34 and a lower cover 33 are provided to prevent loose objects from scattering. In addition, the first and second
An abrasion-resistant rubber plate 35 is attached to the outside of the lower ends of the side covers 31 and 32 so as to be in contact with the lower belt 8b so as to prevent the scattering of loose objects twice.

According to the above-described embodiment, since the area of the discharge port 20 is large on the side where the discharge paddle 6d moves closer to the discharge port 20, it is easy to guide loose objects, and the first side cover 31 is parallel to the release trajectory of the loose substances. Since the loose objects do not hit the first side cover 31, they do not leak from below. Also, on the side where the discharge paddle 6d is about to move away from the discharge port 20, the second side cover 32 is shifted inward, so that the intersection angle between the loose object splashed by the discharge paddle 6d and the release trajectory is small, and It does not protrude from the lower edge of the second side cover 31. Also,
Since the second side cover 32 is located near the center, the loose objects are collected at substantially the center of the two belts 7b and 8b, so that the problem that the loose objects bite into the ears of the belts does not occur.

[0012]

According to the first aspect of the present invention, loose pieces do not leak from the lower side of the first and second side covers.
In addition, since loose objects are collected at substantially the center of the two belts, a problem that the loose objects bite into the ears of the belt does not occur.

[0013]

[Brief description of the drawings]

FIG. 1 is a plan view of a loose object guiding structure according to an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is an explanatory diagram of a vertical transport unit and a screw feeder.

FIG. 4 is a basic configuration diagram of a loose object guiding structure between a vertical transport unit and a screw feeder.

FIG. 5 is a plan view of a conventional example I of a loose object guiding structure.

FIG. 6 is a plan view of a conventional example II of a loose object guiding structure.

[Explanation of symbols]

 Reference Signs List 6 screw feeder 6a screw casing 6d discharge paddle 20 discharge port 30 guide cover 31 first side cover 32 second side cover

Claims (1)

[Claims] 1. A cylindrical casing, a rotating shaft provided at the center of the casing, a screw attached to the rotating shaft for scraping loose objects, and a screw attached to an upper end of the screw. In a screw feeder provided with a discharge paddle for splashing objects outward in a radial direction and a guide cover for guiding the loose objects emitted and discharged so as not to be scattered, the casing has a surface facing the discharge paddle. A discharge port for passing loose materials is formed at a position where the discharge paddle surface on the side where the rotating discharge paddle approaches the discharge port when viewed from the rotation axis is a loose material discharge direction. From the first position in the vicinity of the paddle edge when facing the position, the position where the paddle surface is parallel to the loose material discharge direction and the position where the paddle surface is rearward in the loose material discharge direction on the side away from the discharge port. And the guide cover is arranged in a direction perpendicular to the paddle surface at the first position, the guide cover being brought into contact with the discharge port side edge at the first position. A discharge guide structure for a screw feeder, comprising: a first side cover; and a second side cover that is in contact with a discharge side edge at the second position and is disposed in parallel with the first side cover.