JP7323776B2 - Belt conveyor transfer device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a belt conveyor transferring device used at a belt conveyor transfer section for powdery or granular ironmaking materials such as iron ore, coal, coke, and sintered ore, when the belt conveyor conveys powdery or granular ironmaking materials.

When conveying iron ore, coal, coke, sintered ore, and other powdery raw materials for ironmaking (hereinafter sometimes referred to as "powderous raw materials for ironmaking") on a belt conveyor, the powdery raw materials for ironmaking are biased to the left and right, causing the belt conveyor to It may meander or run unevenly.

When transferring raw materials for powder and grain ironmaking from an upstream belt conveyor (hereinafter referred to as "upstream belt conveyor") to a downstream belt conveyor (hereinafter referred to as "downstream belt conveyor"), the upstream belt conveyor may meander or run unevenly. If this is the case, the powdery raw material for ironmaking that falls from the upstream belt conveyor to the downstream belt conveyor does not fall to the widthwise central portion of the downstream belt conveyor, causing the downstream belt conveyor to meander or run unevenly.

When the downstream belt conveyor meanders or runs unevenly, the raw materials for powdery or granular ironmaking may drop from the downstream belt conveyor, or the raw materials for powdery or granular ironmaking on the upstream belt conveyor may drop without transferring to the downstream belt conveyor.

Therefore, it is well known to arrange a transfer chute at the belt conveyor transfer section in order to guide the powdery or grain ironmaking raw material falling from the upstream belt conveyor to the widthwise central portion of the downstream belt conveyor. Many transfer chutes and transfer devices have been proposed (see, for example, Patent Documents 1 to 8).

In Patent Document 1, there is a division that is swingably supported so that the inclination angle with respect to the conveyor is variable, that is curved in the width direction so as to wrap the unloading side end of the conveyor, and that the surface is individually elastically supported. A conveyor chute is disclosed which is constructed by disposing bodies.

In Patent Document 2, a stone box liner 13 is fixed to the lower end of a chute buffer 7 installed between an upper belt conveyor 2 and a lower belt conveyor 3, and a space is provided on the side of the chute buffer 7 on the side of the stone box liner 13, A belt conveyor chute device is disclosed which is equipped with an auxiliary chute buffer 17 provided with an auxiliary stone box liner 18 facing below the stone box liner 13 at its lower end.

In Patent Document 3, in a funnel-shaped connecting chute for a belt conveyor provided at a connecting portion between an upper conveyor and a lower conveyor for conveying granules, the inner surface of the chute main body wall on the front side of the upper conveyor is flexible. A plate is provided vertically, and between the flexible plate and the wall of the chute body on the front side of the upper conveyor, a rotatable roller is provided at the lower end, and the mounting member provided on the chute body can swing as a fulcrum. A transfer chute for a belt conveyor is disclosed, which is characterized in that it is provided with a lower part of a deposit stripping device.

In Patent Document 4, in a belt conveyor facility in which belt conveyors are arranged in multiple stages, at a transfer portion between an upstream belt conveyor and a downstream belt conveyor, a conveyed product from the upstream belt conveyor is placed at the center of the downstream belt conveyor. An object delivery position control device having a delivery position control plate of a tilt angle variable type for dropping, wherein the object delivery amount, the bulk density of the object, the moisture content of the object, the angle of the delivery position control plate and the Equipped with an angle correction arithmetic unit that corrects the tilt angle of the delivery position control plate by multiplying the amount of meandering of the downstream belt conveyor by each correction coefficient, and outputs this corrected tilt angle signal to the control system of the delivery position control plate. A conveyed object transfer position control device for a belt conveyor characterized by the following is disclosed.

In Patent Document 5, in a powder or granular material guide chute device of a belt conveyor provided at a transfer portion with a lower conveyor facing the carry-out end of an upper conveyor that conveys powder or granular material, the inclination angle is variablely supported. a chute body, a ceramic liner that covers a range in which the particles discharged from the upper conveyor collide with the surface of the chute body and fall in contact with the surface of the chute body; An apparatus for guiding and chute powders and grains to a belt conveyor is disclosed, comprising a vibrating liner vibrated by a coated vibrator.

In Patent Document 6, a plurality of link chains are suspended from above by support rods toward the exit of the chute in a transfer section chute provided at the unloading end of the belt conveyor from the upstream side to the downstream side belt conveyor. and are densely arranged so as to block the falling parabolic flow path of the conveyed article.

In Patent Document 7, in a conveyed object guide chute device provided at a transfer portion with a downstream belt conveyor facing the unloading end of an upstream belt conveyor, the inner wall side of the chute main body is rocked in the front-rear direction with the upper portion as a fulcrum. A movably vertically installed ceramic sheet and a sheet angle adjusting device for variably supporting the inclination angle of the sheet are provided on the back side of the ceramic sheet, and a conveyed product discharged from the upstream belt conveyor collides with the ceramic sheet. Disclosed is a conveyed object guide chute device in a belt conveyor transfer section characterized by a structure in which an object drops onto a downstream side belt conveyor while coming into contact with each other.

In Patent Document 8, a conveyed object is disposed between an upstream belt conveyor and a downstream belt conveyor positioned below the upstream belt conveyor, and discharged and fed from the exit side of the upstream belt conveyor. Conveyor belt deviation prevention device for preventing deviation of the conveyor belt of the downstream side belt conveyor due to the uneven accumulation of A transfer chute is provided for forming a path for dropping and guiding the transfer chute. are arranged along the width direction of the conveyor belt of the downstream side belt conveyor, and guide the conveyed product whose drop trajectory has been changed onto the conveyor belt of the downstream side belt conveyor through the opening formed between them. A device for preventing deviation of a conveyor belt in a belt conveyor is disclosed, which is characterized by having a guide plate of .

As described above, the transfer chute has been improved and devised in various ways in order to guide the powdery ironmaking raw material falling from the upstream belt conveyor to the widthwise central portion of the downstream belt conveyor.

However, not only the transfer chutes disclosed in Patent Documents 1 to 8, but also the transfer chute has the problem that the powdery iron-making raw material falling down wears and breaks the hole. There is always the problem that the sticking causes the raw materials for powder and grain ironmaking to drift on the chute surface, thereby promoting meandering or uneven running of the downstream belt conveyor.

Japanese Utility Model Laid-Open No. 53-091180 Japanese Utility Model Laid-Open No. 59-074905 Japanese Utility Model Laid-Open No. 64-043008 JP-A-06-227640 Japanese Utility Model Laid-Open No. 06-087314 JP-A-10-059530 JP-A-10-279061 JP 2017-145068 A

Therefore, in view of the problems faced by the prior art, the present invention (a) prevents the transfer chute from being worn and broken by powdered ironmaking raw materials falling from the upstream belt conveyor, and (b) the upstream chute. A belt conveyor transfer that solves the problem of accurately guiding the raw materials for powder and grain ironmaking that fall from the belt conveyor to the center in the width direction of the downstream belt conveyor and preventing meandering and uneven running of the downstream belt conveyor. The purpose is to provide an apparatus.

The present inventors diligently studied methods for solving the above problems. As a result, if a metal plate is placed on the structural frame surrounding the transfer section of the powdery iron-making raw material at a position to block the falling of the powdery iron-making raw material, and a deposit of the powdery raw material is formed on the metal plate. , the slope of the sediment functions as a chute surface to solve the above problems.

The present invention was made based on the above findings, and the gist thereof is as follows.

(1) In a belt conveyor transfer device provided with a structural frame surrounding a transfer section where powder or grain ironmaking raw materials are transferred from an upstream belt conveyor to a downstream belt conveyor, the structural frame is parallel to the downstream belt conveyor, and On the inside of the downstream belt conveyor, the frame plate facing the powdered ironmaking raw materials falling from the upstream belt conveyor,
A transfer device for a belt conveyor, wherein a metal plate that collides with the falling powdery iron-making raw material and forms a pile of the powdery iron-manufacturing raw material is disposed between the frame plate and the metal plate.

(2) The slope formed by the metal plate and the frame plate functions as a chute that guides the powdery raw materials for ironmaking falling from the upstream belt conveyor to the center in the width direction of the downstream belt conveyor. The belt conveyor transfer device according to (1).

(3) The belt conveyor transfer device according to the above (1) or (2), wherein the metal plate is arranged so as to be able to move forward and backward with respect to the falling powdery ironmaking raw material.

(4) The belt conveyor according to any one of (1) to (3), wherein the width of the metal plate parallel to the downstream belt conveyor is equal to or greater than the width of the upstream belt conveyor x 0.6. relay device.

According to the present invention, since the powdery ironmaking raw material falling from the upstream belt conveyor is accurately guided to the widthwise central portion of the downstream belt conveyor and transferred, the meandering and uneven running of the downstream belt conveyor is prevented, and the powdery grains are transferred. It is possible to improve the efficiency of belt conveyor transfer transportation of raw materials for steelmaking.

It is a figure which shows typically the side cross section aspect of the belt conveyor transfer apparatus of this invention. FIG. 2 is a diagram schematically showing a plan view in the direction of the arrow in the AA cross section of FIG. 1;

The belt conveyor transfer device of the present invention (hereinafter sometimes referred to as "the transfer device of the present invention") is
In a belt conveyor transfer device provided with a structural frame surrounding a transfer section where powder and grain ironmaking raw materials are transferred from an upstream belt conveyor to a downstream belt conveyor, the structural frame is parallel to the downstream belt conveyor (unless otherwise specified, "Parallel to the belt conveyor" means parallel to the conveying direction of the belt conveyor.) and inside the downstream belt conveyor (Unless otherwise specified, "inside the belt conveyor" means ), the falling raw material for powdery or granular ironmaking collides with the frame plate facing the raw material for powdery or grainy ironmaking falling from the upstream belt conveyor, and the space between the frame and the frame plate , a metal plate forming a pile of raw materials for powder and grain ironmaking is arranged.

In the transferring device of the present invention, the inclined surface of the stack formed by the metal plate and the frame plate functions as a chute that guides the powdery ironmaking raw material falling from the upstream belt conveyor to the widthwise central portion of the downstream belt conveyor. Characterized by

The transfer device of the present invention is characterized in that the metal plate is arranged so as to be able to move forward and backward with respect to the falling raw material for powder and grain ironmaking.

The transfer device of the present invention is characterized in that the width of the metal plate parallel to the downstream belt conveyor is equal to or greater than the width of the upstream belt conveyor×(0.6 to 0.8).

Hereinafter, the transit device of the present invention will be described with reference to the drawings.

FIG. 1 schematically shows a side cross-sectional view of the belt conveyor transfer device of the present invention, and FIG. 2 schematically shows a plane view in the direction of the arrow in cross section AA of FIG. An example in which the upstream belt conveyor and the downstream belt conveyor are arranged substantially perpendicular to each other will be described below with reference to the drawings, but the embodiment of the present invention is not limited to this.

The powdery and granular ironmaking raw material 3 conveyed by the upstream belt conveyor 1 rotated by the pulley 2 and the other pulley (not shown) is transferred to the downstream belt conveyor 8 at the belt conveyor transfer portion surrounded by the structural frame 4. .

The structural frame 4 comprises a frame 5a and a frame 5b on the upper inner side of the downstream belt conveyor 8 and parallel to the downstream belt conveyor 8a. A dust-proof plate 7 is attached to the lower ends of the frames 5a and 5b to close the space between the lower ends and the downstream belt conveyor. 8, the dust-proof plate 7 is not necessary when the dust-proof action is performed.

The structural frame 4 that surrounds the transfer section of the powdery iron-making raw material is parallel to the downstream belt conveyor 8 and faces the powdery iron-making raw material 3 dropping from the upstream belt conveyor 1 inside the downstream belt conveyor 8. A metal plate 6 protruding toward the widthwise central portion 8a of the downstream belt conveyor 8 is disposed on the frame plate 5a at a position where it collides with the powdery ironmaking raw material 3 dropping from the upstream belt conveyor. This point is a feature of the structure of the transit device of the present invention.

The powdery iron raw material 3 falling from the upstream belt conveyor 1 collides with the frame plate 5a and the metal plate 6, so that it accumulates between the frame plate 5a and the metal plate 6, and is deposited on the metal plate 6 at the angle of repose θ A deposited body 9 having a slope 9a of .

Then, the powdery ironmaking raw material 3 continuously falling from the upstream belt conveyor 1 collides with the slope 9a of the deposit 9, slides down, is guided to the widthwise central portion 8a of the downstream belt conveyor 8, and is conveyed to the downstream belt conveyor. I will be transferring to 8.

That is, the slope 9a (angle of repose θ) of the stack 9 of the powdery iron-making materials 3 formed between the frame 5a and the metal plate 6 moves the powdery iron-making materials 3 falling from the upstream belt conveyor 1 to the downstream belt. It functions as a chute that guides the conveyor 8 to the widthwise central portion 8a. This point is a feature of the function based on the structure (feature) of the transit device of the present invention.

As described above, the inclined surface 9a (angle of repose θ) of the piled body 9 of the raw material powder 3 functions as a self-lining chute in which the raw material powder 3 slides down. , no broken holes due to friction.

In addition, since the powdery and granular ironmaking materials 3 that have slid down the slope 9a (angle of repose θ) of the piled body 9 of the powdery and granular ironmaking materials 3 fall toward the widthwise central portion 8a of the downstream belt conveyor 8, the downstream belt conveyor 8 meandering or eccentric running is suppressed, the powdery iron-making raw material 3 is prevented from falling from the downstream belt conveyor 8, and the transfer of the powdery iron-making raw material 3 progresses efficiently.

FIGS. 1 and 2 show a transfer mode in which the upstream belt conveyor 1 and the downstream belt conveyor 8 are perpendicular to each other. The arrangement is not limited to a specific arrangement (for example, orthogonal), as long as the arrangement can form the deposit 9 of the powdery ironmaking raw material 3 falling from the bottom.

As described above, the metal plate is arranged at a position where it collides with the powdery or granular ironmaking raw material falling from the upstream belt conveyor on the frame plate facing the powdery or granular ironmaking raw material.

The arrangement position in the height direction (H in FIG. 1 [distance from the center of the downstream belt conveyor]) and the projection length from the frame (L in FIGS. 1 and 2) are from the upstream belt conveyor Taking into consideration the trajectory and amount (kg/min) of the falling raw materials for powdery and granular ironmaking, the powdery raw materials that slide down the slope (angle of repose θ) of the deposit of the powdery and granular ironmaking materials are positioned at the center of the width direction of the downstream belt conveyor. Set to fall on the part.

According to the operational results, the conveying speed and conveying amount of the belt conveyor are almost constant regardless of the type of powdered ironmaking raw material, and the angle of repose θ is also almost constant at 30 to 45°. As long as the drop trajectory and drop amount (conveyance amount) of the powdered ironmaking raw material falling from the upstream belt conveyor may be approximately the same, the metal plate is positioned at a certain position (H in FIG. 1) and has a certain protrusion. The length (L in FIG. 2) may be fixed to the frame.

However, it may be necessary to change the length of protrusion of the metal plate from the frame, depending on the type of raw material for powder and grain ironmaking, the transport speed and the transport amount of the belt conveyor. It is preferable to dispose so that it can advance and retreat (the length of protrusion of the metal plate from the frame is variable). By adjusting the length of protrusion of the metal plate from the frame, it is possible to guide the raw material for powdery or granular ironmaking to the central portion of the downstream belt conveyor.

In FIGS. 1 and 2, the metal plates are arranged horizontally, but between the frame and the metal plate, a deposit having a slope of repose angle θ is formed of the raw materials for powder and grain ironmaking that fall from the upstream belt conveyor. As long as it is done, the metal plate may be slanted.

Although the metal plate is not subject to abrasion by the powdery iron raw material, it is required to have the strength to support the piled body of the powdery raw material and to withstand the drop impact of the powdery raw material. Any metal plate will suffice. Considering also the corrosion resistance to the raw material for powder and grain ironmaking, the metal plate is preferably a plate made of stainless steel, for example.

The width of the metal plate in the direction parallel to the downstream belt conveyor is, as shown in FIG. Any width (W in FIG. 2) may be used, and the width is not particularly limited.

Normally, the raw materials for powder and grain ironmaking are placed on the central part of the belt conveyor and conveyed by the width of the belt conveyor × (0.6 to 0.8), and are dropped as they are at the transfer part of the belt conveyor. Therefore, the width of the metal plate (W in FIG. 2) should be equal to or greater than the width of the upstream belt conveyor×0.6, more preferably equal to or greater than the width of the upstream belt conveyor×0.8. The upper limit of the width of the metal plate is not particularly limited, as it may be set in consideration of the width of the structural frame surrounding the transfer section of the belt conveyor.

As described above, according to the present invention, since the raw materials for powder and grain ironmaking that fall from the upstream belt conveyor are accurately guided to the widthwise central portion of the downstream belt conveyor and transferred, meandering and uneven running of the downstream belt conveyor can be prevented. It is possible to prevent this and improve the efficiency of belt conveyor transfer transportation of powdered iron manufacturing raw materials. Therefore, the present invention has high applicability in the steel industry.

REFERENCE SIGNS LIST 1 upstream belt conveyor 2 pulley 3 powdery powder iron raw material 4 structural frame 5a, 5b frame plate 6 metal plate 7 dust-proof plate 8 downstream belt conveyor 8a width direction central portion 9 stack 9a slope θ repose angle H distance L projection length Height W Width

Claims (3)

In a belt conveyor transfer device provided with a structural frame surrounding a transfer portion where powder and grain ironmaking raw materials are transferred from an upstream belt conveyor to a downstream belt conveyor, the structural frame is parallel to the downstream belt conveyor and is positioned on the downstream belt conveyor Inside the , the falling raw material for powdery and granular ironmaking collides with the frame plate facing the raw material for powdery and granular ironmaking falling from the upstream belt conveyor, and a deposit of the raw material for powdery and granular ironmaking is formed between the frame plate and the frame plate. A belt conveyor , wherein a metal plate is arranged to protrude from the structural frame , and the metal plate is arranged so that the length of protrusion of the metal plate from the structural frame is variable. transfer device. 2. The slope of the deposit formed by the metal plate and the frame plate functions as a chute that guides the powdery ironmaking raw material falling from the upstream belt conveyor to the widthwise central portion of the downstream belt conveyor. A belt conveyor transfer device as described. 3. The belt conveyor transfer device according to claim 1, wherein the width of the metal plate in the direction parallel to the downstream belt conveyor is equal to or greater than the width of the upstream belt conveyor×0.6.

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