JPH1059530A - Powder material sticking prevention device to chute of belt conveyor connection part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent powder material from sticking to the side wall of a chute by hanging a plurality of link chains by a support bar toward a chute exit and densely arraying the link chains so as to interrupt the parabolic channel of a carrier object, within the connection part chute of the carrying tip part of an upstream side belt conveyor. SOLUTION: A link chain 6 is hung in front of an upstream side belt conveyor 1 and the tip is turned to the lower end part exit of a chute 2. A support bar 7 hangs a plurality of link chains 6 and the link chains 6 are made to cross the parabolic channel 10 of a carrier object 4. The support bar 7 hanging the link chains 6 is allowed to be linear and it is better for the support bar 7 top have a projection shape in a direction that the carrier object is carried. When the link chains 6 are hung on the support bar 7 of this shape, the channel of the carrier object is restricted not only in the flow direction but also in the flow width direction and scattering of the carrier object 4 to both the sides of the chute 2 is prevented. Thus, carrier objects colliding against the chute wall surface are further reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing powder from adhering to a chute at a transfer portion of a belt conveyor for conveying a conveyed material such as powder or lump such as iron ore or coal. About.

[0002]

2. Description of the Related Art Generally, when a powdery material or a lump material is conveyed by a plurality of belt conveyors, a transfer end of an upstream belt conveyor and a carry-in end of a downstream belt conveyor provided thereunder are generally used. A transfer chute is installed between them. The conveyed material guided by this chute and discharged from the discharge end of the upstream belt conveyor moves onto the downstream belt conveyor.

At this time, a part of the powder adheres and accumulates on the inner wall surface of the chute. If this accumulation gradually grows, it not only hinders the conveyance, but also causes abnormal wear of the belt due to the accumulation powder, and pollutes the working environment due to falling minerals and charcoal near the chute. Therefore, it is necessary to periodically remove the deposits on the inner wall surface of the chute.

As a method of removing such deposits, the deposits have been pushed down with a metal rod or washed off with water. However, it is extremely dangerous to perform such a work during the operation of the belt conveyor, and if the operation is stopped, the operation rate of the belt conveyor is reduced, and there are problems such as impairing productivity. Further, in the washing with water, splashing water and the wetness of the conveyed material have promoted adhesion to other chutes and have caused troubles at the use destination of the conveyed material.

Further, a method has been proposed in which an impact is applied to the outer surface of the chute using an air knocker or a vibrator to continuously peel and remove the powder, but a number of devices are required to obtain an appropriate effect. In addition to the power source for the drive, space for equipment arrangement was required, which was not very practical. In addition, damage such as cracks and cracks in the chute body due to impact was also observed.

Conventionally, there has been proposed a method for preventing the powder from adhering to the chute in order to cope with the above problems. For example, Japanese Unexamined Utility Model Publication No. 50-147385 discloses an adhesion preventing device in which a bar plate composed of a plurality of rods is arranged so that a conveyed material discharged from a discharge end of an upstream belt conveyor does not directly hit a chute. Have been described.

This device is shown in FIG. FIG. 2A is a longitudinal sectional view of a connecting portion where a bar plate is installed. A bar plate 5 is provided at the tip of the discharge end of the upstream belt conveyor 1 so as to be located at the center of the chute 2. . Reference numeral 3 denotes a downstream belt conveyor, which differs from the upstream belt conveyor in the conveying direction by 90 degrees. (B) The figure shows the details of the bar plate 5,
A number of shielding rods 8 are supported by a support shaft 9 so as to be able to swing independently and are arranged in a line. The discharged conveyed object is dropped against the shielding rod 8 so as not to directly hit the chute.

[0008]

However, the above-mentioned bar plate has a problem that the effect varies depending on the interval between the shielding bars, and a stable effect cannot be obtained.
In other words, if the distance between the shielding bars is small, independent swings are hindered from each other, and the bar plate becomes like an integrated plate. The discharged conveyed material is strongly reflected, and the powder is applied to the side wall on the front side of the chute. Adhere to.

On the other hand, if the interval between the shielding bars is wide, the conveyed material discharged through the gap passes, and the powder adheres to the side wall on the front side. In addition, the shielding rod may fall due to wear of the support portion and damage the downstream belt.

The present invention has been made in order to solve such a problem, and efficiently prevents the powder from adhering to the chute side wall by flexibly regulating the flow path of the discharged conveyed material. The purpose is to:

[0011]

The means for achieving this object is the following invention. According to a first aspect of the present invention, a plurality of link chains are suspended from above by a support rod toward a chute outlet in a transfer chute provided at a carry-out end of an upstream belt conveyor, and The device is a device for preventing powder adhesion of a belt conveyor connecting portion chute that is densely arranged so as to block the parabolic flow path and is suspended toward the chute outlet.

When the conveyed article is conveyed to the unloading end of the upstream belt conveyor, it is then discharged and falls on a chute with a parabolic trajectory. If many link chains are suspended from above so as to block the parabolic flow path of these conveyed objects, the conveyed objects collide with these link chains and push them forward, but the conveyed objects themselves Loses momentum in the traveling direction given by the upstream belt conveyor, falls vertically and heads toward the chute outlet.
In addition, since the link chain is very flexible, the conveyed object colliding with the link chain is not strongly reflected. For this reason, the amount of conveyed objects colliding with the chute wall surface is drastically reduced, and the adhesion and accumulation of powder are prevented.

The reason why the link chains are densely arranged is to prevent a conveyed object from passing through the gap between the link chains. However, even if they are densely arranged, the rings constituting the link chains can move freely. Is allowed, so that the link chains do not hinder the swing.

According to a second aspect of the present invention, the support rod for suspending and supporting the plurality of link chains has a convex shape in a direction in which a conveyed object on a belt conveyor is conveyed. This is a device for preventing powder adhesion of a belt conveyor transfer section chute.

The support rod for suspending the link chain may be straight, but has a curved shape, as shown in FIG. 2, which is convex in the direction in which the conveyed articles on the belt conveyor are conveyed. It is better to be. When the link chain 6 is hung on the support bar 7 having this shape, the flow path of the conveyed product is restricted not only in the flow direction but also in the width direction of the flow, and the conveyed material is prevented from scattering on both sides of the chute. Will be. As a result, the number of articles colliding with the chute wall surface is further reduced.

[0016]

FIG. 1 shows a state in which a link chain is suspended. FIG. 1 shows a positional relationship between a link chain and a flow path of a conveyed product, wherein 4 is a conveyed product, 6 is a link chain, and 7 is a support rod. The link chain is suspended from the upstream side of the belt conveyor 1, and the tip of the link chain is directed to the outlet, which is the lower end of the chute 2. The support bar 7 suspends a plurality of link chains 6, and the link chains 6 traverse the parabolic flow path 10 of the conveyed article 4.

FIG. 2 shows a case where the shape of the link chain support rod is curved. In this case, it is better that the shape is convex in the direction of the flow of the conveyed object. This has the effect of restricting the flow path of the conveyed material not only in the flow direction but also in the width direction of the flow, thereby preventing the conveyed material from scattering on both sides of the chute. The convex shape may be an arc shape or a polygonal shape.

The link chain 6 is rotatably mounted on the support bar 7 without being fixed so that it can move flexibly. The attachment and arrangement of the link chain 6 is shown in FIG. (A) As shown in the figure, the link chain 6 is attached to the connection fitting 7a of the support rod 7. Connection bracket 7
For a, a rotating pin may be used so as not to hinder the swing of the link chain 6, but a hook may be used to hook the link chain 6 thereon. (B) The figure shows the connecting bracket 7a.
A U-bolt is used, and a link chain 6 is hooked on the U-bolt.

The spacing between the connecting fittings 7a is set so that there is no gap between the connecting fittings 7a and adjacent link chains when viewed from the running direction of the upstream belt conveyor. Even with this setting, in order that the link chains 6 can swing independently without being restricted to each other, the link chains 6 are attached with a degree of freedom so that the positions of the link chains 6 on the connecting fittings 7a are shifted. I just need.

For more precise mounting, there is a mounting method shown in FIG. In the figure, (a) shows a case where the support rod 7 is linear, and the positions of the link chains 6 on the connection fittings 7a are slightly shifted from each other. (B) The figure shows the case where the support rod has a curved and convex shape, and the above-mentioned gap does not remain even if the interval between the connecting fittings 7a is not necessarily smaller than the width of the link chain 6.

If the link chain breaks due to wear or the like and falls, unlike a rigid rod, the impact effect is small, so that the downstream belt conveyor is not damaged.

[0022]

EXAMPLE A conveyor for transferring iron ore was provided with a device for preventing powder adhesion of a chute of a belt conveyor connecting portion of the invention, and the conveyor was operated. The support rod was curved in a circular shape, the diameter of the circle was slightly larger than the width of the belt, and a U-bolt was used for the connection fitting. The material of the link chain is steel, which is a material equivalent to SBC690 according to JIS standards and is generally commercially available.

As for the length of the link chain, a falling trajectory of a conveyed object which flies to the earliest when there is no link chain is expected, and the lower end of the link chain is positioned below this trajectory. However, the lower end is located above the chute outlet so that it can easily return to a predetermined position when the cargo is exhausted.

As a result of continuing the operation for one month and examining the degree of powder adhesion, the powder adhering to the chute was less than one-tenth that of a conventional powder adhesion prevention device using a bar plate. there were. In addition, although abrasion was observed with the conventional shielding rod, almost no abrasion was observed with the link chain.

This is probably because the link chain is more flexible than the bar plate and absorbs the momentum of the iron ore block at a high rate. Further, the powder adhered and deposited on the bar itself in the bar plate, but did not reach the point where the adhered powder was deposited in the link chain. This is because, in the link chain, different movements are performed for each ring and further for each ring constituting the link chain in response to the impact of the iron ore block, so that the attached powder is peeled off by itself.

Since a commercially available general product was used as the link chain, an apparatus was completed at low cost, and maintenance such as inspection and replacement of the link chain was easy.

[0027]

As described above, in the apparatus for preventing powder adhesion of the chute in the belt conveyer connecting portion of the belt conveyor according to the present invention, the link chain which swings independently from above in the chute is hung densely. ing. For this reason, the conveyed material containing the powder discharged from the upstream belt conveyor collides with the flexible link chain and pushes it, losing the forward force, and falls toward the chute outlet immediately below. Therefore, since the conveyed object does not collide with the chute wall surface, the powder does not adhere. As described above, the continuous operation of the belt conveyor over a long period of time can be performed with a simple and easy-to-maintain apparatus, and the effect of the present invention in which the operation efficiency is improved is great.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a device for preventing powder adhesion of a chute at a transfer portion of a belt conveyor according to the present invention.

FIG. 2 is a perspective view of a powder adhesion preventing device showing a curved support rod and a link chain.

FIG. 3 is a perspective view and a longitudinal sectional view of a connection fitting for attaching a link chain.

FIG. 4 shows a support bar showing how to attach a link chain.
It is a top view of a connection metal fitting and a link chain.

FIG. 5 is a longitudinal sectional view of a conventional belt conveyor transfer portion chute powder adhesion preventing device and a perspective view of a bar plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upstream belt conveyor 2 Chute 3 Downstream belt conveyor 4 Conveyed object 5 Bar plate 6 Link chain 7 Support rod 7a Connection metal fitting 8 Shield rod 9 Support shaft 10 Parabolic flow path.

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000002118 Sumitomo Metal Industries Co., Ltd. 4-33, Kitahama, Chuo-ku, Osaka-shi, Osaka (72) Inventor Tsuyoshi Shinmoto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nippon Kokan Co., Ltd. (72) Inventor Shoji Hamaya 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor St. Komamura 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Inside Chiba Works (72) Inventor Tomomi Ishikawa 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. No address) Inside the Mizushima Works of Kawasaki Steel Corp. (72) Inventor Hiroshi Goto 1 Kanazawacho, Kakogawa City, Hyogo Prefecture Kobe Steel Co., Ltd. Kakogawa Works In-house (72) Inventor Masao Kurita 1 Kanazawa-cho, Kakogawa-shi, Hyogo Pref. Inside Kobe Steel, Ltd.Kakogawa Works (72) Inventor Shinichi Shibusawa 3rd light section, Kajima-cho, Kashima-gun, Ibaraki Pref. Inside the steelworks (72) Inventor Yasutaro Maeda 1850 Minato, Wakayama-shi, Wakayama Prefecture Sumitomo Metal Industries, Ltd.Wakayama steelworks

Claims (2)

[Claims] 1. A plurality of link chains are suspended from above by a support rod toward a chute outlet in a transfer chute provided at a discharge end from an upstream belt conveyor to a downstream belt conveyor. An apparatus for preventing powder adhesion of a belt conveyer transfer section chute, which is densely arranged so as to block a falling parabolic flow path of a conveyed object. 2. A support bar, which suspends and supports the plurality of link chains, has a convex shape in a direction in which a conveyed object on a belt conveyor is conveyed. A device for preventing powder adhesion of a belt conveyor transfer section chute as described in the above.