JP7163655B2 - Sintering machine and sealing device for sintering machine - Google Patents

Description

The present invention relates to sealing technology for a sintering machine having a plurality of pallet cars arranged adjacent to each other on an endless track.

The sintering machine has a plurality of pallet trucks arranged on an endless track. A plurality of pallets are adjacent to each other to form a continuous transport conveyor. Raw materials for sintering are loaded on a series of pallets and transported. During transport, the fuel, such as coke breeze, in the loaded raw material is ignited. After ignition, the iron ore is heated and partially melted to form sinter by burning the fuel in the feedstock. Below the pallets loaded with raw materials, a wind box group consisting of a series of wind boxes that create a negative pressure is arranged. The windboxes are connected to an induced draft fan. The flue gas from the raw material loaded on the pallet truck is sucked into the wind box. Therefore, the raw material is always supplied with air from above.

In order to keep the wind box under pressure, the space below the pallet truck leading to the wind box is required to be sealed. Therefore, in the conventional sintering machine, the pallet truck is conveyed with a pair of seal bars provided on the lower surface of the pallet truck in contact with a pair of wear bars provided along the track. As a result, the space between the pair of seal bars is shielded from the atmosphere.

In addition, a dead plate is arranged as a sealing device for the wind box at the end of the wind box group in the transport direction. The dead plate is a plate-shaped member arranged so as to be in contact with the lower surface of the pallet truck at the end of the wind box group in the transport direction. The dead plate isolates the negative pressure space inside the wind box from the atmosphere outside the wind box at the end of the wind box group in the transport direction. Various proposals have been made to improve the sealing performance between the lower surface of the pallet truck and the surface of the dead plate.

For example, Japanese Patent Application Laid-Open No. 2012-247088 (Patent Document 1) discloses a sintering machine that includes a mechanism for vertically moving a dead plate and a mechanism for pressing the dead plate against the lower surface of a pallet truck.

JP 2012-247088 A

In the above prior art, the dead plate is vertically movable and pressed against the bottom surface of the pallet truck. can be followed. In the structure in which the dead plate is movable up and down, the dead plate is separated from other components of the sintering machine located outside at both ends in the width direction. Therefore, a space that can serve as a path for air leakage is generated near both ends of the dead plate in the width direction. The inventors thought that this space could not be neglected from the viewpoint of further prevention of wind leakage.

The inventors have studied simplification of the configuration for sealing from the viewpoint of reducing the space that can be a path for air leakage. Furthermore, prevention of air leakage and elimination of problems assumed by simplifying the configuration were investigated. As a problem due to the simplification of the configuration, there was a concern that the pallet truck would hit the dead plate.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sintering machine and a sealing device that can both prevent air leakage and prevent a pallet truck from being bumped against a dead plate.

A sintering machine in an embodiment of the present invention is a sintering machine having a plurality of pallet trucks conveyed on an endless track. Each of the pallet trucks includes a plurality of girder beams extending in the width direction and arranged side by side in the conveying direction, a pair of side frames supporting both ends of the plurality of girder beams and extending in the conveying direction, and the plurality of It has a plurality of great bars spanning the upper part of the girder and arranged in the width direction, and a pair of seal bars attached to the lower surfaces of the pair of side frames so as to move vertically. The sintering machine includes a wind box group composed of a plurality of wind boxes arranged in the conveying direction below the pallet truck in a region where the pallet truck loaded with the raw material for sintering is conveyed; A pair of wear bars arranged at positions in contact with the lower surfaces of a pair of seal bars and formed to extend in the conveying direction, and a pair of wear bar supports supporting the pair of wear bars respectively below the pallet truck; A flexible dead plate disposed below the pallet truck and between the pair of wear bars outward in the conveying direction from at least one of both ends of the wind box group in the conveying direction. , a dead plate in which the relative positions of both ends in the width direction with respect to the wear bar are processed, a push-up device for pushing up the dead plate from below, and an upstream end in the conveying direction of the dead plate, provided side by side in the width direction, and a plurality of guide plates extending obliquely downward in a direction opposite to the conveying direction.

According to the disclosure of the present application, it is possible to achieve both the prevention of air leakage and the prevention of the pallet truck from hitting the dead plate.

FIG. 1 is a perspective view of a sintering machine. FIG. 2 is an enlarged view of FIG. FIG. 3 is a cross-sectional view of a portion including a pallet truck in this embodiment. FIG. 4 is a side view of two adjacent pallet trucks and dead plates. 5 is a cross-sectional view taken along line VV of FIG. 4. FIG. FIG. 6 is an enlarged view of FIG. FIG. 7 is a sectional view of the girder beam and the dead plate of the pallet truck. FIG. 8 is a cross-sectional view showing a modification of the seal structure below the dead plate. 9 is a cross-sectional view taken along line IX-IX of FIG. 8. FIG. 10 is a perspective view of the shielding member and dead plate shown in FIGS. 8 and 9. FIG. FIG. 11 is an exploded perspective view showing a modification of the shielding member. 12 is a cross-sectional view of the shielding member shown in FIG. 11. FIG. FIG. 13 is a perspective view showing a modification of the shielding member. FIG. 14 is a perspective view showing a modification of the shielding member.

When the pallet truck is used continuously, the girder beam (which can also be called under the girder) at the bottom of the pallet truck may bend downward. One means for avoiding the flexed portion from colliding with the dead plate is to make the entire dead plate movable up and down and press it against the pallet truck under the girder.

Furthermore, the dead plate may be made flexible and may be provided with a mechanism for pushing up from below at a plurality of positions of the dead plate. As a result, the dead plate follows the flexing of the pallet truck and flexes while being in close contact with the pallet truck, preventing air leakage between the dead plate and the pallet truck (see, for example, Japanese Patent Application Laid-Open No. 2012-247088). .

However, in the sintering machine having such a configuration, there are spaces in the vicinity of both ends of the dead plate in the width direction, which may serve as paths for air leakage. As a result of diligent studies, the inventors came up with the following embodiment as an example of a sintering machine capable of achieving both the prevention of air leakage and the prevention of ramming.

(Configuration 1)
A sintering machine in an embodiment of the present invention is a sintering machine having a plurality of pallet trucks conveyed on an endless track. Each of the pallet trucks includes a plurality of girder beams extending in the width direction and arranged side by side in the conveying direction, a pair of side frames supporting both ends of the plurality of girder beams and extending in the conveying direction, and the plurality of It has a plurality of great bars spanning the upper part of the girder and arranged in the width direction, and a pair of seal bars attached to the lower surfaces of the pair of side frames so as to move vertically. The sintering machine includes a wind box group composed of a plurality of wind boxes arranged in the conveying direction below the pallet truck in a region where the pallet truck loaded with the raw material for sintering is conveyed; A pair of wear bars arranged at positions in contact with the lower surfaces of a pair of seal bars and formed to extend in the conveying direction, and a pair of wear bar supports supporting the pair of wear bars respectively below the pallet truck; A flexible dead plate disposed below the pallet truck and between the pair of wear bars outward in the conveying direction from at least one of both ends of the wind box group in the conveying direction. , a dead plate in which the relative positions of both ends in the width direction with respect to the wear bar are processed, a push-up device for pushing up the dead plate from below, and an upstream end in the conveying direction of the dead plate, provided side by side in the width direction, and a plurality of guide plates extending obliquely downward in a direction opposite to the conveying direction.

In configuration 1 above, the relative positions of both ends of the dead plate in the width direction with respect to the wear bars are fixed. That is, both ends of the dead plate in the width direction are not movable with respect to the wear bar. As a result, it is possible to reduce the space that can be the path of the leaked air. In addition, the dead plate has flexibility, and the central portion in the width direction is pushed up from below by a pushing-up device. This configuration makes it easier for the upper surface of the dead plate to follow the lower surface of the girder beam of the pallet truck. Further, a plurality of guide plates extending obliquely downward from the end of the dead plate in the direction opposite to the conveying direction are arranged side by side in the width direction. The guide plate makes it difficult for the girder beam of the pallet truck to hit the dead plate. Since it is difficult for the pallet to be bumped, the height of the upper surface of the dead plate can be brought closer to the lower surface of the girder beam of the pallet truck. Therefore, the followability of the upper surface of the dead plate to the lower surface of the girder beam of the pallet truck can be further enhanced. In this way, according to Configuration 1, it is possible to achieve both prevention of air leakage and prevention of the pallet truck from hitting the dead plate.

The form in which the dead plate is flexible is, for example, a state in which the central portion between the fixed ends of the dead plate can be elastically deformed so as to be vertically displaced. The range in which the central portion between both ends of the dead plate can be elastically deformed in the vertical direction is preferably equal to or larger than the vertical displacement width of the lower surface of the girder beam of the pallet truck, for example.

(Configuration 2)
In the configuration 1, it is preferable that the difference between the height of the upper ends of the widthwise ends of the dead plate and the height of the upper surface of the wear bar is within 5 mm. As a result, the space between the dead plate and the girder beam of the pallet truck can be reduced. This further prevents air leakage.

(Composition 3)
In either configuration 1 or 2 above, it is preferable that the difference between the height of the upper surface of the weir bar and the height of the lower end of the girder beam of the pallet truck is within 5 mm. As a result, the space between the dead plate and the girder beam of the pallet truck can be reduced.

(Composition 4)
In any one of configurations 1 to 3 above, the sintering machine may further include a seal member attached to a lower portion of the girder beam and formed to extend below the lower surface of the girder beam. The sealing member can further enhance the sealing performance between the lower surface of the beam and the upper surface of the dead plate.

(Composition 5)
In configuration 4 above, the girder beam may have a projection that protrudes above the lower surface of the girder beam in the conveying direction or in the direction opposite to the conveying direction. A sealing member may be attached to the protrusion, the sealing member being formed by extending from the protrusion to below the lower surface of the girder beam.

(Composition 6)
In Configuration 5 above, it is preferable that the protrusions are formed so as to extend continuously in the width direction. The sealing member may be provided under the projection so as not to protrude beyond the projection in the conveying direction or in the direction opposite to the conveying direction. The projection protects the sealing member from the flow of the sintering exhaust gas.

(Composition 7)
In any one of the above configurations 4 to 6, the sealing member may include a configuration in which a plurality of thin metal plates are stacked, or a configuration in which a thin plate is sandwiched between wire brushes. Thereby, the sealing member has flexibility. Therefore, the sealing member can be elastically deformed according to the change in the distance between the lower surface of the beam and the upper surface of the dead plate. For example, the lower end of the sealing member is a free end, and the sealing member is elastically deformable such that the lower end of the sealing member is positioned above the lower surface of the beam.

(Composition 8)
In any one of the above configurations 1 to 7, the sintering machine includes a plate-like end surface member forming an end surface of the wind box group in the conveying direction, and a lower surface of the dead plate arranged side by side in the width direction, a plurality of plate members slidably contacting the air-side surface of the end surface member; A covering sheet member may further be provided. With this configuration, even if the central portion of the dead plate in the width direction is bent, a gap is less likely to occur between the dead plate and the wind box.

In any one of the above configurations 1 to 7, the sintering machine may further include a vertically flexible shielding member that forms an end surface of the wind box group in the conveying direction. In this case, the upper end of the shielding member is in contact with the lower surface of the dead plate, the lower end of the shielding member is in contact with the wind box, and both ends of the bellows member in the width direction are in contact with the weir bar support. good. With this configuration, even if the central portion of the dead plate in the width direction is bent, a gap is less likely to occur between the dead plate and the wind box.

(Configuration 10)
The sealing device in the sintering machine of any one of configurations 1 to 7 is also included in the embodiments of the present invention. A sealing device according to an embodiment of the present invention is a sealing device for a sintering machine having a plurality of pallet trucks conveyed on an endless track. The sealing device is arranged at a position in contact with the lower surface of a pair of seal bars attached vertically movable to the lower surface of each of the pallet trucks loaded with raw materials for sintering, and is formed to extend in the conveying direction. Weir bars, a pair of weir bar supports that respectively support the pair of weir bars below the pallet truck, and a plurality of winders arranged in the conveying direction below the pallet truck loaded with raw materials for sintering. A flexible dead box arranged below the pallet truck and between the pair of wear bars outward in the conveying direction from at least one of both ends in the conveying direction of the wind box group composed of boxes. A dead plate having a fixed position relative to wear bars at both ends in the width direction; a plurality of guide plates arranged side by side in a direction and extending obliquely downward in a direction opposite to the conveying direction.

In this specification, in the pallet truck, the direction in which raw materials for sintering are stacked is the top, and the opposite direction is the bottom. The conveying direction is the traveling direction of the pallet truck when the pallet truck is conveyed on the track. The width direction is a direction perpendicular to the transport direction and the vertical direction.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same reference numerals are given to the same or corresponding parts in the drawings, and the description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a perspective view showing a configuration example of a sintering machine 100 according to this embodiment. The sintering machine 100 comprises a plurality of pallet trucks 10 arranged adjacent to each other on an endless track. The endless track includes an upper stage and a lower stage. On the upper stage of the endless track, a pallet truck 10 loaded with raw materials for sintering is conveyed in the direction indicated by arrow Y1 from the ore supply side KS, which is upstream, toward the ore discharge side HS, which is downstream. The conveying direction of the upper stage is assumed to be the y-axis. The x-axis is the width direction, and the z-axis is the vertical direction.

A bottom ore hopper 31, a feed hopper 32, and an ignition furnace 33 are arranged in this order from upstream above the upper stage of the endless track. The bottom ore hopper 31 feeds relatively coarse ore fines onto the pallet truck 10 . The iron ore fed from the bottom ore hopper 31 covers the fire grate that is the bottom of the raw material storage section of the pallet truck 10 . The ore feed hopper 32 feeds relatively fine fine ore to the pallet truck 10 . Coke is mixed with the fine ore that is fed. The ignition furnace 33 ignites the surface of the sintered ore raw material accommodated in the pallet truck 10 . Due to the ignition, combustion starts from the upper layer of the sintering raw material on the pallet truck 10 . By the time the pallet car 10 reaches the downstream end of the upper tier, combustion has reached the bottom layer of sintering material on the pallet car 10 . At the downstream end of the upper tier, the pallet truck 10 turns over and drains.

A plurality of wind boxes 21 are arranged below the pallet truck 10 in the upper stage of the endless track. A plurality of wind boxes 21 constitute a group of wind boxes. A plurality of wind boxes 21 are arranged side by side in the transport direction. That is, a plurality of wind boxes 21 are provided in an area where a pallet truck loaded with raw materials for sintering is conveyed. The spaces within the plurality of wind boxes 21 are interconnected and isolated from the atmosphere. A pipe is connected to each of the wind boxes 21 . The space inside the wind box 21 is connected to an induced draft exhaust fan (not shown) through a pipe.

A dead plate 17 is arranged at an upstream end and a downstream end in the conveying direction of the wind box group composed of a plurality of wind boxes 21 . The dead plate 17 is a plate-shaped member extending outward from the end of the air box group, which is composed of the plurality of air boxes 21 , in the conveying direction. The widthwise dimension of the dead plate 17 is the same as or longer than the widthwise dimension of the opening at the end of the wind box group in the transport direction. That is, the dead plate 17 is formed extending in the width direction so as to cover between the width direction ends at the ends in the transport direction of the internal space of the wind box group. The dead plate 17 contacts the lower surface of the pallet truck 10 passing over the dead plate 17 . That is, the pallet truck 10 passing over the dead plate 17 is conveyed with its lower surface in contact with the dead plate 17 . As a result, the ends of the wind box group in the transport direction are sealed. The dimension of the dead plate 17 in the transport direction can be made larger than the dimension of the pallet truck 10 in the transport direction, for example. Although FIG. 1 shows the pallet truck 10 floating on the dead plate 17 for the sake of clarity, it does not actually float.

FIG. 2 is an enlarged view of the vicinity of the end of the ore discharge side HK of the wind box group composed of the plurality of wind boxes 21 of the sintering machine 100 shown in FIG. As shown in FIG. 2, a pair of wear bars 13 extending along the conveying direction are arranged below the pallet truck 10 on the upper stage of the endless track. The pair of wear bars 13 are spaced apart in the width direction. The widthwise length between the pair of wear bars 13 is substantially the same as the widthwise dimension of the upper opening of the wind box 21 . The wear bar 13 is arranged at a position in contact with a seal bar (described later) attached to the lower surface of the pallet truck 10 .

The wear bar 13 is supported by the wear bar support 12 . The wear bar support 12 includes a base plate on which the wear bar 13 is placed, a vertically extending support portion that supports the base plate, and a bottom portion that supports the lower portion of the support portion. The supporting portion of the weir bar support 12 extends in the transport direction and forms part of the side wall of the closed space of the wind box group.

A dead plate 17 is positioned between the pair of wear bars 13 . The relative positions of both ends of the dead plate 17 in the width direction and the pair of wear bars 13 are fixed. The dead plate 17 may not be supported by the wear bar 13 itself. For example, dead plate 17 may be supported by wear bar support 12 . Both ends of the dead plate 17 in the width direction are in contact with the pair of wear bars 13 . The dead plate 17 has flexibility. Therefore, the portion between both ends of the dead plate 17 can be elastically deformed so as to be vertically displaced.

The height of the top surface of the dead plate 17 can be substantially the same as the height of the top surface of the wear bar 13 . A plurality of guide plates 18 are provided at the upstream end of the dead plate 17 in the transport direction. The plurality of guide plates 18 are arranged side by side in the width direction. Each guide plate 18 protrudes from the end of the dead plate 17 in the direction opposite to the conveying direction. The guide plate 18 extends obliquely downward from the dead plate 17 in a direction opposite to the conveying direction. The lower surface of the pallet truck 10 entering onto the dead plate 17 is guided onto the dead plate 17 along the slope of the guide plate 18 . When the lower surface of the pallet truck 10 is lower than the upper surface of the dead plate 17 , the lower surface of the pallet truck 10 abuts against the guide plate 18 and advances in the conveying direction and is guided onto the dead plate 17 when entering.

In the example shown in FIG. 2, the guide plate 18 is formed by plate ribs extending along a plane perpendicular to the upper surface of the dead plate 17 . The guide plate 18 has an inclined surface that slopes downward from the dead plate 17 in a direction opposite to the conveying direction. It is preferable that the slope of the guide plate 17 is continuous with the upper surface of the dead plate 17 . By arranging a plurality of guide plates 18 in the width direction, the guide plates 18 do not prevent the dead plate 17 from bending between both ends in the width direction.

The shape of the guide plate 18 is not limited to ribs. For example, the guide plate 18 may be a strip. When the guide plate 18 is a strip, the widest surface, that is, the surface of the strip, forms a slope extending obliquely downward from the dead plate 17 in the direction opposite to the conveying direction. Two adjacent guide plates 18 among the plurality of guide plates 18 may be spaced apart or may be in contact with each other.

FIG. 3 is a cross-sectional view of the pallet truck 10, the wind box 21, and the wear bar 13 in a plane perpendicular to the conveying direction. The pallet truck 10 includes a pallet frame 2, a pair of side plates 1 arranged at both ends in the width direction of the pallet frame 2, and a plurality of great bars 8 arranged on the pallet frame 2 between the pair of side plates 1. . The pallet frame 2 has a girder beam 2a extending in the width direction and a pair of side frames 2b supporting both ends of the girder beam 2a. A plurality of great bars 8 are arranged on the girder beam 2a. A plurality of great bars 8 constitute a grate. A pair of side plates 1 are attached to the upper surface of the pallet frame 2 . A pair of side plates 1 extend upward from the pallet frame 2 . A pair of wheels 7 are rotatably attached to both ends of the pallet frame 2 in the width direction. Axles 7a of the pair of wheels 7 extend in the width direction. Raw materials for sintering are loaded onto the grate. That is, the raw material for sintering is stored in the space surrounded by the grate of the plurality of great bars 8 and the pair of side plates 1 .

FIG. 4 is a side view of the pallet truck 10 passing over the dead plate 17 as seen from the width direction. As shown in FIG. 4 , a plurality of girder beams 2 a are arranged side by side in the transport direction of the pallet truck 10 . The great bar 8 spans over two girder beams 2a aligned in the transport direction.

Referring to FIG. 3 again, the wheels 7 roll on rails 11 extending in the conveying direction. A pair of wear bars 13 extending in the transport direction and a pair of wear bar supports 12 supporting the pair of wear bars 13 are arranged inside the rails 11 . The wear bar 13 and the wear bar support 12 are arranged below the pallet truck 10 . The lower surface of the pallet frame 2 is formed with two recesses 2c. The recess 2c extends in the transport direction. The two recesses 2c are spaced apart in the width direction. A pair of seal bars 4 extending in the transport direction are inserted into each of the two recesses 2c. Each of the pair of seal bars 4 is attached to the pallet frame 2 so as to be vertically movable. When the pallet truck 10 is loaded with raw materials and conveyed, the seal bar 4 moves relative to the weir bar 13 in the conveying direction while the lower surface of the seal bar 4 is in contact with the upper surface of the weir bar 13 . That is, the seal bar 4 slides on the wear bar 13 .

A plurality of wind boxes 21 are arranged below the pallet truck 10 . A plurality of wind boxes 21 are arranged side by side in the transport direction, that is, the y direction. A space below the great bar 8 of the pallet truck and between the pair of seal bars 4 , the pair of weir bars 13 , and the pair of weir bar supports 12 is connected to the space in the wind box 21 . Gas in the wind box 21 is sucked by an induced draft fan (not shown). The space inside the wind box 21 is connected to an induced draft fan through a duct. A negative pressure is created in the wind box 21 . That is, the space surrounded by the great bar 8, the pair of seal bars 4, the pair of weir bars 13, and the pair of weir bar supports 12 has a negative pressure. As a result, the gas in the raw material is sucked into the wind box 21 through the grate of the great bar 8, and the air above the raw material is taken into the raw material.

As shown in FIG. 4, the sintering machine 100 includes a push-up device 41 that pushes up the widthwise central portion of the dead plate from below. The push-up device 41 includes a weight 45 and a link 42 that transfers the gravity of the weight 45 to the lower surface of the dead plate 17 . Link 42 is rotatably supported around shaft 44 extending in the width direction. A pressing member 43 is attached to one end of the link 42 so as to be rotatable around an axis extending in the width direction. A weight 45 is suspended from the other end of the link 42 . The pressing member 43 is in contact with the lower surface of the central portion between both ends of the dead plate 17 in the width direction. With this configuration, the gravity of the weight 45 is transmitted to the pressing member 43, and the pressing member 43 presses the lower surface of the central portion of the dead plate 17 in the width direction from below. Two push-up devices 41 are arranged side by side in the transport direction. As a result, two portions of the dead plate 17 spaced apart in the conveying direction are pushed up from below by the pushing-up device 41 .

Note that the configuration of the push-up device 41 is not limited to the configuration shown in FIG. For example, the push-up device 41 may be configured to push up the dead plate 17 by the elastic force of a spring. In this case, the push-up device 41 can include a spring and a transmission member that transmits the elastic force of the spring as a force pushing the dead plate 17 from below.

In the example shown in FIG. 4, the guide plates 18 are provided at both ends of the dead plate 17 in the transport direction, that is, at both the upstream end and the downstream end in the transport direction. The guide plate 18u at the upstream end extends obliquely downward from the upstream end of the dead plate 17 in the transport direction toward the direction opposite to the transport direction. The downstream end guide plate 18d extends obliquely downward in the transport direction from the downstream end of the dead plate 17 in the transport direction. Thus, by providing the guide plates 18 at both ends of the dead plate 17 in the conveying direction, even when the pallet truck travels in the direction opposite to the conveying direction for repairing the sintering machine, the pallet truck does not move to the dead plate. It is possible to make it difficult to bump into 17.

In the example shown in FIG. 4 , a plate member 15 extending downward is provided on the lower surface of the dead plate 17 . The plate member 15 is fixed in close contact with the dead plate 17 . 5 is a cross-sectional view taken along line VV of FIG. 4. FIG. As shown in FIG. 5, a plurality of strip-shaped plate members 15 are arranged side by side in the width direction. This does not hinder the bending of the dead plate in the width direction.

Again referring to FIG. 4 , the lower portion of the plate member 15 is in slidable contact with the end member 22 of the wind box 21 . The end member 22 is provided at the end of the wind box group in the transport direction. The hot noodle member 22 forms an end surface of the wind box group in the conveying direction. The end surface member 22 is a plate-shaped member extending in the vertical direction and the width direction. The lower end of the end member 22 is fixed in close contact with the wind box 21 . Both ends of the end member 22 in the width direction are fixed in close contact with the wear bar support 12 . The plate member 15 is in contact with the outer surface of the end surface member 22, that is, the surface on the atmosphere side. A sheet member 16 is provided to cover a region extending from the dead plate 17 through the surface of the plate member 15 to the end surface member 22 . The sheet member 16 is provided outside the wind box 21, that is, on the atmosphere side. The sheet member 16 is provided over the entire width of the end member 22 . The sheet member 16 covers the sliding surfaces of the plate member 15 and the end surface member 22 and a region including the periphery thereof from the outside. The sheet member 16 may be, for example, a cloth-like member coated with a viscous paste-like substance. The plate member 15, the end member 22, and the sheet member 16 block the passage of air between the wind box 21 and the dead plate 17 at the end face in the transport direction of the wind box group.

If the entire dead plate 17 is vertically movable as in the prior art, a sliding surface between the dead plate and the wear bar support is required over the length of the dead plate in the transport direction. This sliding surface has a gap through which leaked air can pass. In contrast, in the present embodiment, both ends of the dead plate 17 are fixed relative to the wear bar 13 over the length of the dead plate 17 in the transport direction. For example, both ends of the dead plate 17 are hermetically fixed to the wear bar support 12 . The dead plate 17 as a whole is not vertically movable with respect to the wear bar 13 . Therefore, it is possible to construct a structure in which there is no sliding surface between the dead plate and the wear bar or between the dead plate and the wear bar support. As a result, it is possible to eliminate the space through which leaked air enters from the periphery of the sliding surface.

FIG. 6 is an enlarged view of a portion including the wear bar 13 in FIG. FIG. 6 illustrates the dead plate 17 and the plate member 15 . As shown in FIG. 6 , the vertical height of the upper surface of the dead plate 17 at both ends in the width direction is substantially the same as the height of the upper surface of the wear bar 13 . Also, the distance T1 between the upper surface of the weir bar 13 and the lower surface of the girder 2a is smaller than the thickness of the weir bar 13 . The distance T1 can be, for example, 5 mm or less. In addition, the relative positions of both ends of the dead plate 17 in the width direction with respect to the wear bars 13 are fixed. In the example shown in FIG. 6, both ends of the dead plate 17 in the width direction are fixed to the wear bar support 12 by fixtures 12a. Note that both ends of the dead plate 17 in the width direction may be fixed in close contact with the wear bar support 12 without using a fixture. The dead plate 17 has flexibility to such an extent that a portion between both ends in the width direction, ie, a central portion, can be vertically displaced by elastic deformation. In this configuration, the dead plate 17 is pushed from below by the push-up device. Further, as shown in FIGS. 2 and 4, a guide plate 18 is provided that extends obliquely downward from the upstream end of the dead plate 17 in the conveying direction in the direction opposite to the conveying direction.

As a result, when the pallet truck 10 enters the area of the dead plate 17, the girder beam 2a rubs against the surface of the guide plate 18 that first comes into contact with it and is oblique with respect to the conveying direction. The girder beam 2a is in close contact with the central portion of the dead plate and pushes down the central portion as it passes over the upper surface of the dead plate.

For example, the central portion of the girder beam 2 a of the pallet truck 10 may be bent and the lower surface of the girder beam 2 a may become lower than the upper surface of the wear bar 13 . In this case, the lower surface of the girder beam 2a follows the slope of the guide plate 18, and the pallet truck 10 pushes down the dead plate 17 without bumping into the dead plate 17 and advances while contacting the dead plate 17. can. As described above, the guide plate 18 is configured to allow the dead plate 17 to bend. By thus providing the guide plate 18 on the dead plate 17 , the lower surface of the pallet truck 10 is guided to the upper surface of the dead plate 17 . Furthermore, the dead plate 17 can bend according to the lower surface of the pallet truck 10 . As a result, even if the distance T1 between the dead plate 17 and the girder 2a is narrowed, it is possible to achieve both prevention of wind leakage and prevention of slamming.

A distance T2 shown in FIG. 6 is the distance between the upper surface of the weir bar 13 and the lower surface of the girder 2a in the prior art. Conventionally, the distance T2 is, for example, about 25 mm, and the dead plate as a whole is vertically movable. In this case, the dead plate is pushed up to a height above the upper surface of the weir bar and brought into contact with the girder 2a. With such a configuration, it is difficult to prevent leakage of air from the gap between the side surface of the vertically moving member including the dead plate and the inner vertical surface of the wear bar support.

In this embodiment, the inner surface of the wear bar support 12 and the dead plate 17 do not slide. Moreover, since the upper surface of the dead plate 17, that is, the sliding surface, is substantially the same height as the sliding surface of the wear bar 13, the dead plate 17 can be hermetically welded and fixed to the wear bar support 12, for example. In this manner, the clearance between the dead plate 17 and the wear bar support, which is generated when the dead plate 17 is movable up and down, is eliminated. Therefore, there is no leakage of air from the clearance of this sliding portion.

FIG. 7 is a cross-sectional view of the girder beam 2a of the pallet truck 10 passing over the dead plate 17. As shown in FIG. FIG. 7 is a cross-sectional view of a plane perpendicular to the width direction. In the example shown in FIG. 7, dead plate 17 includes base material 17a and liner 17b. Thus, the dead plate 17 can be formed of multiple layers. As shown in FIG. 7, the girder 2a may be provided with a sealing member 51 extending below the lower surface 2e of the girder 2a. In this example, the girder 2a has a projection 2d projecting in the direction opposite to the conveying direction above the lower surface 2e of the girder 2a. A flange 2f is formed at the lower end of the beam 2a. 2 d of protrusions are provided in the end surface of the conveyance direction of the flange 2f. The flange 2f of the girder 2a has a length in the conveying direction that is wider than other adjacent portions.

A seal member 51 is attached to the lower surface of the protrusion 2d. The seal member 51 extends inward from the lower surface of the projection 2d, bends downward, and extends below the lower surface 2e of the beam 2a. One end of the sealing member 51 is attached to the protrusion 2d, and the other end is a free end. The sealing member 51 can be a plate-like sheet. The seal member 51 is attached to the girder 2a in a curved state. Moreover, the protrusion 2d and the sealing member 51 may be formed over the entire width direction of the beam 2a.

When the pallet truck 10 passes over the dead plate 17 , the seal member 51 comes into contact with the dead plate 17 . The seal member 51 closes the gap between the dead plate 17 and the beam 2a. As a result, wind leakage is further suppressed.

The sealing member 51 has flexibility. That is, therefore, the sealing member 51 is elastically deformable. For example, the seal member 51 can be pushed from below by the dead plate 17 and elastically deformed such that the entire seal member 51 is retracted above the lower surface 2e of the girder 2a. As a result, when the distance T1 between the dead plate 17 and the lower surface 2e of the girder 2a becomes approximately 0 mm, the sealing member 51 is retracted above the lower surface 2e of the girder 2a, and when the distance T1 is not 0 mm, the lower surface It can extend downward from 2 e and contact the dead plate 17 .

In addition, the contact of the flexible seal member 51 with the surface of the dead plate 17 further enhances the adhesion. For example, when the center of the girder beam 2a of the pallet truck 10 is flexed the most in the width direction, even if the dead plate 17 is pressed against the girder beam 2a from below, a gap is formed near both ends of the girder beam 2a in the width direction. may occur. In such a case, by bringing the seal member 51 attached to the girder beam 2a into contact with the surface of the dead plate 17, it is possible to prevent the gap from being generated near both ends.

The sealing member 51 can be, for example, a stack of thin plates such as SUS steel plates, or a thin plate sandwiched between wire brushes. Thermal spraying or the like can be applied to the portion including the free end of the seal member 51 . As a result, the portion of the seal member 51 in contact with the dead plate 17 is less likely to be worn.

Further, the sealing member 51 shown in FIG. 7 is provided so as to be positioned in the shadow of the projection with respect to the flow direction of the sintering exhaust gas. As a result, the dust contained in the sintering exhaust gas is less likely to collide with the sealing member 51 .

By combining the configuration in which both ends of the flexible dead plate 17 in the width direction are fixed to the wear bar 13 and the configuration in which the sealing member 51 is attached to the girder 2a, the dead plate 17 and the pallet truck 10 are further separated. The distance from the lower surface of the beam 2a can be set according to the length of the seal member 51 in the vertical direction. As a result, the followability of the dead plate 17 to the lower surface of the girder beam 2a can be enhanced.

In addition, a sealing member, which is a combination of a wire and a thin plate, can be provided on the upper surface of the dead plate. In this case, high-speed air always flows through the gap between the dead plate and the lower surface of the pallet truck. The dust entrained in the atmosphere causes the sealing member to wear out quickly. In comparison, the seal member 51 attached to the pallet frame 2 as shown in FIG. 7 wears slowly. For example, consider that the pallet truck 10 goes around the endless track in one hour. The pallet truck 10 passes over two dead plates during one round. Therefore, the seal member 51 is exposed to the strong wind once every (1/60)×2=30 minutes. The time for the pallet truck 10 to pass through the dead plate is approximately one minute. Then, the seal member 51 is exposed to strong wind and dust collision for one minute once every 30 minutes. In contrast, if the seal member is attached to the deadplate, the seal member is exposed to dust impingement continuously 24 hours a day. Assuming that the life of the seal member attached to the dead plate is about 2.0 months, the life of the seal member 51 attached to the girder 2a is 5 years, which is 30 times that. Therefore, the seal member 51 attached to the girder beam 2a is a seal member that can be replaced over its lifetime and that is easy to maintain.

(Modified example of configuration for sealing between the lower surface of the dead plate and the wind box)
The configuration for sealing between the lower surface of the dead plate and the wind box is not limited to the strip-shaped plate member 15, the plate-shaped end surface member 22, and the sheet member 16 described above. FIG. 8 is a side view showing a configuration example in which the plate member 15, the end surface member 22 and the sheet member 16 in FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8. FIG. FIG. 10 is a perspective view of the shield member 23 and the dead plate 17 shown in FIGS. 8 and 9. FIG.

In the examples shown in FIGS. 8-10, the shielding member 23 is attached between the lower surface of the dead plate 17 and the wind box. The shield member 23 includes a bellows plate 23a and a pair of flat plates 23b. The pair of flat plates 23b are fixed in close contact with both ends of the bellows plate 23a in the width direction. The pair of flat plates 23b and the bellows plate 23a are connected by welding or the like, for example. The surfaces of the pair of flat plates 23b opposite to the bellows plate 23a are fixed in close contact with the wear bar support 12. As shown in FIG. As a result, the relative positions of both ends of the blocking member 23 in the width direction with respect to the wear bar support 12 are fixed.

The bellows plate 23a is a plate member curved into a shape including a plurality of edges 23r. A plurality of ridges 23r of the bellows plate 23a protrude in the conveying direction and extend in the width direction. A portion between both ends in the width direction of the bellows plate 23a has flexibility in the vertical direction. In the examples shown in FIGS. 8 to 10, the top and bottom ends of the bellows plate 23a are flat. A curved portion is included between the upper end and the lower end of the bellows plate 23a. This curved portion forms a plurality of ridges. The bellows plate 23a is formed, for example, by pressing a metal plate. In the example shown in FIGS. 8 to 10, the bellows plate 23a is formed by bending a single metal plate into mountain folds along a plurality of lines extending in the width direction. In this case, the bellows plate 23a has flexibility in the direction perpendicular to the edge.

The upper end portion of the shielding member 23 is fixed to the lower surface of the dead plate 17 in close contact with the lower surface of the dead plate 17 with a certain length in the conveying direction and over the entire width direction. Further, the lower end of the shielding member 23 is also fixed to the wind box 21 with a certain length in the transport direction and in close contact with the wind box 21 over the entire width direction. The upper end of the shielding member 23 can bend following the lower surface of the dead plate 17 .

In this manner, the shielding member 23 is fixed to the dead plate 17, the wind box 21, and the pair of weir bar supports 12 in an airtight state, and is vertically movable in the portion between both ends in the width direction. Flexible. Thereby, the blocking member 23 blocks the area surrounded by the dead plate 17 , the wind box 21 and the pair of weir bar supports 12 at the ends of the wind box group in the transport direction. Moreover, the portion between both ends of the blocking member 23 in the width direction can be vertically expanded and contracted. Therefore, when the central portion of the dead plate 17 in the width direction is bent, the blocking member 23 is deformed following the bending of the dead plate 17 . Thereby, even if the dead plate 17 is bent, the shielding member 23 and the lower surface of the dead plate 17 can be kept in close contact with each other.

The configuration of the blocking member 23 is not limited to the above example. For example, the pair of flat plates 23b of the blocking member 23 may be omitted. In this case, both ends of the bellows member 23 a in the width direction may be fixed in close contact with the wear bar support 12 .

FIG. 11 is an exploded perspective view of shielding member 23 in a modified example. FIG. 12 is a view showing a part of the cross section of the bellows member 23a constituting the shielding member 23 shown in FIG. 11, taken along a plane perpendicular to the width direction. In the example shown in FIGS. 11 and 12, the bellows member 23a is composed of a plurality of metal plates 23a1 that are joined together without gaps. The plurality of metal plates 23a are arranged side by side in the vertical direction.

An upper end portion of the uppermost metal plate 23a1 of the plurality of metal plates 23a is fixed to the lower surface of the dead plate 17 in close contact with the lower surface of the dead plate 17 over a certain length in the transport direction and over the entire width direction. The lower end of the lowermost metal plate 23a1 has a certain length in the conveying direction and is fixed to the wind box over the entire width. The intermediate metal plate 23a1 between the uppermost metal plate 23a1 and the lowermost metal plate 23a1 is closely bonded to the two vertically adjacent metal plates 23a1 over the entire width direction. Each of the plurality of metal plates 23a1 has a portion separated from the adjacent metal plate 23a. A joint portion between two adjacent metal plates 23a1 forms a ridge extending in the width direction. Two adjacent metal plates 23a1 can be joined by welding, for example. Both ends of the bellows member 23a in the width direction are fixed in close contact with the pair of flat plates 23b.

FIG. 13 is a perspective view showing a modification of the shielding member 23. As shown in FIG. In the example shown in FIG. 13, the shielding member 23 has a rectangular frame 23c and a sheet 23d attached to four sides of the frame 23c without gaps. The sheet 23d covers the entire area surrounded by the frame 23c. The sheet 23d may be, for example, a cloth-like member coated with a viscous paste-like substance. The seat 23d may be attached to the frame 23c in a slack state.

The frame 23c includes an upper surface 23c1, side surfaces 23c2, 23c3 and a lower surface 23c4. The upper surface 23c1 of the frame 23c has flexibility and is fixed in close contact with the dead plate 17 over the entire width direction. The side surfaces 23 c 2 and 23 c 3 are fixed in close contact with the pair of wear bar supports 12 . The lower surface 23c4 is fixed in close contact with the wind box 21 over the entire width direction.

FIG. 14 is a perspective view showing a modification of the shielding member 23. As shown in FIG. In the example shown in FIG. 14, the shielding member 23 has a curved plate 23f and a pair of flat plates 23e1 and 23e2 provided at both ends of the plate 23d in the width direction. The plate 23f is curved so as to wrap around an axis extending in the width direction. An upper end 23f1 of the plate 23f is fixed in close contact with the dead plate 17 over the entire width direction. A lower end 23f2 of the plate 23f is fixed in close contact with the wind box 21 over the entire width direction. A pair of flat plates 23e1 and 23e2 are fixed in close contact with the wear bar support. Since the plate 23f is curved, it has flexibility in the vertical direction. Therefore, the upper end 23 f 1 of the plate 23 f can bend in the vertical direction following the bending of the dead plate 17 . Note that the pair of flat plates 23e1 and 23e2 may be omitted. In this case, both ends of the plate 23f in the width direction can be fixed in close contact with the wear bar support 12. As shown in FIG.

The shielding members 23 shown in FIGS. 8 to 14 are all tightly fixed to other members at the top surface, the bottom surface, and the side surfaces at both ends in the width direction. The entire area surrounded by these top, bottom and side surfaces is covered with a member that can bend up and down. This covering member can be, for example, the bellows member 23a, the sheet 23d, or the curved plate 23f, but is not limited to these examples. Moreover, the upper surface of the shielding member 23 is formed of a member that can bend up and down. With such a configuration, the shielding member 23 bends following the bending of the dead plate 17, and shields the air flow between the dead plate 17 and the wind box 21 between the pair of weir bar supports 12. .

The present invention is not limited to the above embodiments. The dead plate may be formed of, for example, a plurality of layers including other layers in addition to the base material and liner, or may be formed of a single layer. Further, the form in which the relative positions of the widthwise ends of the dead plate 17 with respect to the pair of wear bars 13 are fixed is not limited to the above example. For example, other members may be placed between the deadplate and the wear bar. Also, the dead plate and the weir bar support may contact each other. Moreover, in the girder beam, the protrusion on which the sealing member is provided may be provided so as to protrude in the conveying direction.

Although one embodiment of the present invention has been described above, the above-described embodiment is merely an example for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the scope of the invention.

1: Side plate 2: Pallet frame 2a: Girder beam 2b: Side frame 4: Seal bar 8: Grade bar 10: Pallet truck 12: Weir bar support 13: Weir bar 17: Dead plate 18: Guide plate 21: Wind box (wind box) box)
41: push-up device 51: sealing member

Claims (10)

A sintering machine having a plurality of pallet trucks conveyed on an endless track,
Each of said pallet trucks includes:
a plurality of girder beams extending in the width direction and arranged side by side in the conveying direction;
a pair of side frames supporting both ends of the plurality of girder beams and extending in the conveying direction;
a plurality of great bars bridged over the upper portions of the plurality of girder beams and arranged in the width direction;
a pair of seal bars attached to the lower surfaces of the pair of side frames so as to move up and down;
a wind box group composed of a plurality of wind boxes arranged in the transport direction below the pallet truck in a region where the pallet truck loaded with raw materials for sintering is conveyed;
a pair of wear bars arranged at positions in contact with the lower surfaces of the pair of seal bars and formed to extend in the conveying direction;
a pair of wear bar supports that respectively support the pair of wear bars below the pallet truck;
Outward in the conveying direction from at least one of both ends of the wind box group in the conveying direction, below the pallet truck and between the pair of wear bars, an end in the conveying direction of the inner space of the wind box group A flexible dead plate arranged to cover between both ends in the width direction of the dead plate, wherein the relative position of both ends in the width direction with respect to the wear bar is fixed;
a push-up device that pushes up the central portion of the dead plate in the width direction;
a plurality of guide plates provided side by side in the width direction at the upstream end of the dead plate in the conveying direction and extending obliquely downward in the direction opposite to the conveying direction;
sintering machine. 2. The sintering machine according to claim 1, wherein a difference between the height of the upper ends of the widthwise ends of the dead plate and the height of the upper surface of the wear bar is within 5 mm. 3. The sintering machine according to claim 1, wherein the difference between the height of the upper surface of said weir bar and the height of the lower end of said girder beam of said pallet truck is within 5 mm. The sintering machine according to any one of claims 1 to 3, further comprising a seal member attached to the lower portion of the girder beam and formed to extend below the lower surface of the girder beam. The girder beam has a projection that protrudes in the conveying direction or in the direction opposite to the conveying direction above the lower surface of the girder beam,
5. The sintering machine according to claim 4, wherein the seal member is attached to the projection and formed extending from the projection below the lower surface of the beam. The protrusion is formed to extend continuously in the width direction,
The sintering machine according to claim 5, wherein the seal member is provided under the projection so as not to protrude further than the projection in a direction in which the projection protrudes. The sintering machine according to any one of claims 4 to 6, wherein the sealing member includes a structure in which a plurality of metal thin plates are stacked, or a structure in which a thin plate is sandwiched between wire brushes. a plate-shaped end surface member forming an end surface of the wind box group in the conveying direction;
a plurality of plate members provided side by side in the width direction on the lower surface of the dead plate and slidably contacting the air-side surface of the end surface member;
A sheet member covering a region from the dead plate to the end surface member through the surface opposite to the surface sliding on the end surface member of the plate material,
The sintering machine according to any one of claims 1-7. further comprising a vertically flexible shielding member that forms an end surface of the wind box group in the conveying direction;
2. The upper end of the shielding member is in contact with the lower surface of the dead plate, the lower end of the shielding member is in contact with the wind box, and both widthwise ends of the shielding member are in contact with the wear bar support. 8. The sintering machine according to any one of 1 to 7. A sealing device for a sintering machine having a plurality of pallet trucks conveyed on an endless track,
A pair of wear bars arranged at positions in contact with the lower surfaces of a pair of seal bars mounted vertically movable on the lower surfaces of the pallet trucks loaded with raw materials for sintering, and formed to extend in the conveying direction;
a pair of wear bar supports that respectively support the pair of wear bars below the pallet truck;
Outward in the conveying direction from at least one of both ends in the conveying direction of a wind box group composed of a plurality of wind boxes arranged in the conveying direction below the pallet truck loaded with the raw material for sintering, A flexible dead plate disposed below the pallet truck and between the pair of wear bars so as to cover between both ends in the width direction at the ends in the transport direction of the inner space of the wind box group. a dead plate whose relative position to the weir bar at both ends in the width direction is fixed;
a push-up device that pushes up the central portion of the dead plate in the width direction;
A sealing device for a sintering machine, comprising: a plurality of guide plates arranged side by side in the width direction at an upstream end of the dead plate in the conveying direction and extending obliquely downward in a direction opposite to the conveying direction.

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