JPH0989466A - Pallet changing device for sintering machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device by means of which a reduced number of operators can safely replace a failed pallet of a sintering machine. SOLUTION: In pallet-replacing devices for a sintering machine which are respectively installed at both ends of the sintering machine in a direction of width, a bottom frame 21 is fixed to beams of a operation floor located at both sides of the sintering machine in the direction of width, an intermediate fine is capable of being moved widthwise with respect to the sintering machine and an upper flame 27 is capable of being moved on the intermediate flame lengthwise with respect to the sintering machine. A pair of jacks 30 can be installed on mounting tables provided at both sides of the upper frame 27, and the jacks 30 are used to enlarge clearances between a failed pallet and adjacent pallets to replace the failed pallet. Operation of replacing the failed pallet, therefore, can be safely implemented by a less number of operators as compared with the conventional method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintering machine pallet replacement device for extracting a defective pallet from between adjacent pallets and replacing a pallet that has been maintained.

[0002]

2. Description of the Related Art In an endless grate mobile sintering machine,
Traveling rails are arranged vertically between the drive sprocket on the mining side and the reversing section on the mine side, and about 140 to 170 pallets are placed on the top and bottom running rails between the sprocket on the mine side and the reversing section on the mine side. It is designed to run endlessly along. While the pallet moves on the upper rail from the mining side to the mine side, the sintering raw material charged into the pallet is fired. The calcined mass is discharged at the other end of the upper rail while the pallet is being inverted by the mine sprocket. The inverted empty pallet moves from the mine ore side to the ore supply side on the lower rail, is again inverted and raised by the ore supply side sprocket, is sent to the ore supply section, and continuously sinters the sintering raw material. . Since each pallet is sent out toward the machine length direction smelting section by the sprocket on the feed side, there is no connecting means between the pallets, but the pallets on the front move while the pallets on the rear are in pressure contact with each other.

On the above pallet, during a long period of use, the great bar may drop off, traveling wheels may be defective, or side walls may crack. Such defective pallets must be replaced with serviced pallets.

A conventional pallet replacement method will be described below. To replace the pallet, a biting jig 1 as shown in FIG. 4 is used. The chewing jig 1 is formed by connecting a pair of chewing plates 2 with a telescopic tube 3 which can expand and contract. The biting plate 2 has a wide width portion 2a and a narrow width portion 2b, and a stepped portion 2c for avoiding the pallet frame protruding surface under the side wall is formed on one side. Further, a protrusion 2d for hooking on the upper surface of the great bar of the pallet is provided inside the narrow portion 2b.

When a defective pallet is found in the pallets in use, first, as shown in FIG. 5, when the defective pallet 4a is moved to the upper part of the drive sprocket 40 on the mining side, it is burned. Stop the machine. At this time, the pallet 4 adjacent to the side wall of the defective pallet 4a
There is a gap between the c and 4b into which the bite plate 2 can be inserted. Chewing plate of chewing jig according to the pallet width 2
The expansion tube 3 of the jig 1 is attached to the outside of the side wall 7 of the defective pallet 4a by using the expansion tube 3 and the biting plate 2 is applied to the front and rear end surfaces of the pallet. . At this time, the side wall 7 is sandwiched between the protrusion 2d and the expansion tube 3, and the protrusion 2d is placed on the upper surface of the great bar 8 of the pallet (see FIG. 6). Bite jig 1
Are mounted on both sides of the defective pallet 4a in the width direction. Next, the operation of the sintering machine is restarted, and the rear pallet 4b,
Is pushed by the drive sprocket and enters the traveling rail, the biting plate 2 is sandwiched between the defective pallet and the front and rear pallets. Only when the pallet moves and the defective pallet passes under the sintering raw material supply section, the sintering raw material supply is stopped. After that, when the defective pallet reaches the pallet replacement position between the ignition furnace and the mine ore, the sintering machine is stopped again. The state at this time is shown in FIG. In FIG. 6, 4
a is a defective pallet to be replaced, 4b and 4c are pallets before and after the defective pallet, 5 is a traveling wheel, 6 is an inner roller engaged with a drive sprocket, 7 is a side wall, 8 is a great bar, 9 is a traveling rail, and M is It is a sintering raw material. The biting jig 1 is sandwiched between the defective pallet 4a and the front and rear pallets 4b, 4c to form a gap G.

Even when the defective pallet is replaced, sintering of the sintering raw material on another pallet proceeds, and the pallet frame thermally expands. Therefore, the biting plate 2 is more strongly pinched by the end faces of the adjacent pallets, and the defective pallet cannot be pulled out as it is. Therefore, as shown in FIG. 7, a moving frame (also referred to as a swing frame) 43 and a moving frame 4 in the mining section.
The manual hydraulic jack 50 provided between the fixed frames 42 supporting 3 is extended to move the moving frame 43 to the left side in the drawing, and the clamping force between the pallet end faces is released.
Incidentally, 44 is a support roller of the moving frame 43 provided on the lateral beam of the fixed frame 42. The mine sprocket 41 and the mine sprocket bearing 45 are
It is attached to the moving frame 43. In order to keep the pallets pressed against each other by the clamping force, the moving frame 43
Is a wire sheave 46a provided on the side surface of the moving frame 43, and a wire sheave 4 provided on the fixed frame.
6b, 46c, a moving wire sheave 46d, a wire sheave 46e, and a weight 48 hung on the other end of the wire 47 so that the weight is always on the right side of the drawing (on the mining section side).
Energized to move.

After the clamping force is released, wheel stoppers 10 are bolted and set at four positions between the traveling wheels of the pallets 4b and 4c before and after the defective pallet 4a and the traveling rail 9. Collect the biting jig 1. Pull out the defective pallet 4a with an overhead crane. Lift the defective pallet to the storage location. Replace the maintained pallets with an overhead crane. After removing the wheel stopper 10 and shortening the jack 50, the operation of the sintering machine is restarted.

[0008]

However, the conventional pallet replacement method using a biting jig has the following problems. The sintering machine must be stopped twice (when the bite jig is installed and when the pallet is replaced) (production stoppage: total 5 minutes). When removing the defective pallet, the moving frame is moved by a jack to secure a gap between the defective pallet and the pallets on both sides or to release the clamping force. For this reason, many work personnel are required. Due to the thermal expansion of the pallet, it becomes impossible to replace the pallet if the wheel stopper comes off or the position is displaced.
Work needs to be done in a short time.

[0009]

SUMMARY OF THE INVENTION The present invention provides a sintering machine pallet replacement device that solves the above problems by a pair of lower, middle and upper frames provided on both sides in the width direction of the sintering machine. The lower frame is fixed to the beams of the work floor on both sides of the sintering machine in the width direction, and the intermediate frame can be moved on the lower frame in the width direction or the machine length direction of the sintering machine by the intermediate frame moving means. The upper frame is provided so as to be movable in the machine length direction or the width direction of the sintering machine on the intermediate frame by the upper frame moving means, and is contacted with the inner roller of the sintering machine pallet on each upper frame. A sintering machine pallet replacing device is characterized in that a pair of jacks for expanding the spacing of the sintering machine pallet can be attached to the sintering machine pallet replacing device.

When replacing the pallet, the intermediate frame and the upper frame are moved to align the positions of the upper frame in the width direction and the machine length direction with the working position, and the jack is moved to a position to widen the pallet spacing before and after the defective pallet. Attach to the upper frame together. Extend the jack to create a gap between the defective pallet and the front and back pallets. This makes it possible to replace the pallet. After pallet replacement is completed, retract the jack and remove it from the jack cradle. Move the intermediate frame from the working position to the retracted position. This allows the sintering machine to be restarted.

By providing a head block having a curved surface that abuts on the outer peripheral surface of the inner roller of the pallet at the tip of the jack, the inner roller of the sinter machine pallet and the head block at the tip of the jack are engaged, and the sinter machine is securely operated. The space between pallets can be increased.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are a plan view, a front view and a side view, respectively, of an embodiment of the device of the present invention. The device of the present invention is located between the ignition furnace of the sintering machine and the mine ore unit, at a position where pallet replacement by an overhead crane is easy,
A pair is provided on both sides of the pallet. 1 to 3, 4a is a defective pallet, 4b and 4c are pallets before and after the defective pallet, 5 is a traveling wheel, 6 is an inner roller, and 9 is a traveling rail.

Reference numeral 21 is a lower frame fixedly provided on a beam 20 provided below the work floor F on the side of the pallet at the pallet replacement position. The lower frame 21 is provided outside the traveling rail 9 in a length direction parallel to the traveling rail. Two guide bars 22 are provided on the upper surface of the lower frame 21 at predetermined intervals in a direction orthogonal to the traveling rail 9 (width direction of the pallet).

An intermediate frame 23 is provided on the lower frame 21.
Is provided. Four bushes provided on the lower surface of the intermediate frame 23 are fitted to the guide bar 22.
Further, four traveling rollers 24 are provided on the lower surface of the intermediate frame 23 so as to travel on the lower frame 21. Reference numeral 25 is an electric cylinder that engages a threaded rod and a nut, rotates the nut with an electric motor, and expands and contracts the cylinder rod. The tip ends of the cylinder rods of the electric cylinders 25 are connected to the left and right lower surfaces of the intermediate frame 23 in the longitudinal direction. Therefore, the intermediate frame 2
By expanding and contracting the cylinder rod of the electric cylinder 25, 3 is moved forward or backward on the lower frame 21 in a direction orthogonal to the traveling rail 9 while being supported by the traveling roller 24 and guided by the guide bar 22. The electric cylinder 25, the traveling roller 24, the guide bar 22, and the bush correspond to moving means of the intermediate frame 23.

The two guide bars 26 are provided on the intermediate frame 2.
3 is provided on the upper surface of the rail 3 at a predetermined interval in a direction parallel to the traveling rail 9. Four bushes provided on the lower surface of the upper frame 27 are fitted to the guide bar 26. Further, four traveling rollers 28 are provided on the lower surface of the upper frame 27 so as to travel on the upper surface of the intermediate frame 23. The upper frame 27 can be manually supported by the traveling rollers 28 and guided by the guide bars 26 to move on the intermediate frame 23 in a direction parallel to the traveling rail 9. The guide bar 26, the traveling roller 28, and the bush correspond to the upper frame moving means.

In the above example, the intermediate frame 23 moves in the width direction of the sintering machine, and the upper frame 27 moves in the machine length direction of the sintering machine. Alternatively, the upper frame 27 may move in the width direction. Further, the upper frame 27 may be movable by an electric cylinder or the like, or the intermediate frame 23 may be manually moved.

At both ends of the upper frame 27, hydraulic jack mounts 29 are provided so as to project toward the pallet side. The hydraulic jack 30 is attached to the hydraulic jack mount 29.
Place the tip of the cylinder rod on the pallet 4b or 4c.
It is attached toward the outer peripheral side surface of the inner roller 6. 31
Is a head block attached to the tip of the cylinder rod of the hydraulic jack 30, and the front surface of the head block 31 is formed into an arcuate surface conforming to the outer circumference of the inner roller 6. Reference numeral 32 denotes a hydraulic pump provided on the upper frame 27 to extend and contract the cylinder rod of the hydraulic jack 30.

Next, a method of replacing the pallet by the above apparatus will be described. If the defective pallet 4a is found during the operation of the sintering machine, the charging of the sintering raw material is stopped when the defective pallet passes through the mining section, and only the defective pallet 4a is emptied. The operation of the sintering machine is continued as it is, and when the defective pallet 4a reaches substantially the center of the device of the present invention, the sintering machine is stopped.

The following operation of the above-mentioned device is carried out simultaneously for two devices provided on both sides of the pallet.

First, the electric cylinder 25 is extended to advance the intermediate frame 23 and the upper frame 27 at the retracted position toward the pallet side by a predetermined distance. After moving forward, the left and right hydraulic jack mounts 29 are located between the inner rollers before and after the pallets 4b and 4c before and after the defective pallet. When the inner rollers 6 on the outer sides of the pallets 4b and 4c (outer side of the hydraulic jack mounting base) and the hydraulic jack mounting base 29 have different intervals, the upper frame 27 is moved to make the intervals the same.

The hydraulic jack 30 is attached to the hydraulic jack mount 29. The hydraulic pump 32 is started, the hydraulic jack 30 is extended, and gaps are formed between the defective pallets 4a and 4b and between the defective pallets 4a and 4c. Use an overhead crane to replace the defective pallet with a prepared pallet.

Withdrawing the rod of the hydraulic jack 30,
Remove it from the hydraulic jack mount 29. Pull the rod of the electric cylinder 25 into the intermediate frame 23.
Then, the upper frame 27 is returned to the retracted position. Restart the operation of the sintering machine.

[0023]

The following effects can be obtained by using the apparatus of the present invention. Since no biting jig is required, it is not necessary to stop the sintering machine for mounting it. Since it is not necessary to expand the sprocket in the mine discharge section by the conventional jack for moving the moving frame when removing the defective pallet, the replacement work can be performed with less personnel than the conventional method. During replacement work, there is no risk of pallet displacement or removal.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the device of the present invention.

FIG. 2 is a front view of an embodiment of the device of the present invention.

FIG. 3 is a side view of an embodiment of the device of the present invention.

FIG. 4 is a perspective view of a chewing jig used in a conventional method.

FIG. 5 is a side view showing a state in which a jig is attached to a defective pallet at the top of a sprocket on the mining side.

FIG. 6 is a plan view showing a state before a defective pallet is extracted according to a conventional method.

FIG. 7 is a side view showing a jack for releasing a pinching force between end faces of a pallet provided on a fixed frame of a mine discharge section.

[Explanation of symbols]

 4a-4c Pallet 5 Traveling wheel 6 Inner roller 9 Traveling rail 21 Lower frame 22 Guide bar 23 Intermediate frame 24 Traveling roller 25 Electric cylinder 26 Guide bar 27 Upper frame 28 Traveling roller 29 Hydraulic jack mount 30 Hydraulic jack 31 Head block

Claims (2)

[Claims] 1. A sintering machine pallet replacing device comprising a pair of lower, middle and upper frames provided on both sides in the width direction of the sintering machine, wherein the lower frame is on both sides in the width direction of the sintering machine. Is fixed to the beam of the work floor at, the intermediate frame is movable on the lower frame by the intermediate frame moving means in the width direction or the machine length direction of the sintering machine, and the upper frame is moved by the upper frame moving means. A pair of jacks provided on the upper frame so as to be movable in the machine length direction or the width direction of the sinter machine, and on each upper frame to abut the inner rollers of the sinter machine pallets and widen the intervals of the sinter machine pallets. A sinter machine pallet replacement device, which can be attached. 2. The sintering machine pallet replacing device according to claim 1, further comprising a head block having a curved surface that abuts an outer peripheral surface of an inner roller of the pallet, at a tip of the jack.