JP4351288B2 - Ring block transfer device and blast furnace furnace repair method - Google Patents

Description

  The present invention relates to a ring block transport device and a method for repairing a blast furnace furnace body, and can be used for carrying out and carrying in a ring block at the time of blast furnace renewal or dismantling. The present invention relates to an apparatus and method that can be used for carrying-in.

The construction of the blast furnace body is carried out when a blast furnace is newly installed or repaired, and the dismantling of the furnace body is carried out when the blast furnace is repaired or abolished.
In constructing or dismantling such a blast furnace body, a so-called furnace body ring large block construction method has been developed that uses a plurality of ring blocks in which the furnace body is cut into a ring (Patent Document 1).
This method uses a ring block for each section such as a gas collecting mantel at the top of the furnace, an intermediate shaft mantel and a furnace belly mantel, and a bottom mantle at the base.
Each ring block has an iron skin on the outer periphery and is formed with a stave or a refractory material on its inner side, and a series of blast furnace bodies are constructed by connecting to each other.

When constructing the furnace body, set up a work site in the vicinity of the installation site, assemble each ring block here, transport it to the installation site, sequentially carry each ring block inside the furnace body cage and lift it up Connect. Specifically, first of all, the gas collecting mantel block at the top of the furnace is loaded onto the foundation from the side at the furnace base upper surface level, this is lifted, and the intermediate shaft mantel block is loaded and lifted below it. Furthermore, a block for the mantle mantel is carried under it and lifted. Finally, the bottom mantel block is loaded and installed under the furnace bell mantel block, and the suspended blocks are sequentially lowered and connected to each other to assemble a series of furnace bodies.
In dismantling the furnace body, the furnace body is separated into ring blocks in the reverse order of the construction of the furnace body described above, and the gas collecting mantel block, the shaft mantel block, and the furnace belly mantel block are lifted. In this state, the bottom mantel block is removed, and then each block is lowered to the floor in order and carried out to the outside of the cage. Each unloaded block is unloaded from the installation site, transported to a nearby work site, and then dismantled.
By utilizing such a furnace ring large block construction method, it is possible to significantly shorten the construction period such as blast furnace refurbishment.

In such a furnace ring large block construction method, each ring block is transported between an installation site and a work site. For this purpose, a plurality of rows of furnace transport carriages (dolly) equipped with a load level adjustment frame (furnace support frame) are used (paragraphs 0008 to 0009 of FIG. 8A, FIG. 8A). B)) is used.
The support frame for the furnace body has a space in which a ring block can be placed on the upper surface side, and a dolly can enter on the lower surface side.

Such a dolly can support a considerable load even when it is a single unit, but the ring block is very heavy, and therefore, when supporting or moving, a plurality of dollies are combined to distribute the load.
Specifically, a plurality of driven vehicles are connected to a leading vehicle having a driver's cab to form a carriage train, and a plurality of these carriage trains are arranged in parallel and linked to each other to support a large furnace body. It travels on the ground while supporting the gantry to carry it to any position.

Japanese Patent No. 3583354

The aforementioned furnace truck (dolly) has a loading weight determined for each vehicle, and the maximum loading weight is determined by the number of dolly connections.
Among the ring blocks described above, the furnace bottom block when the furnace body is dismantled is particularly heavy. This is because, when dismantling, the molten iron that was in the furnace at the time of blowing was cooled and solidified and accumulated on the bottom of the furnace as residue and other residues (slag and coke).
For this reason, even if the weight of the other ring block when the furnace body is disassembled is less than the maximum loading weight of the connected dollies, the bottom block when the furnace body is disassembled remains the above-mentioned residues, Excessive weight due to contents.

Work to remove residues, firewood, coke, etc. remaining in the furnace bottom, stave coolers, fire bricks, etc. installed in the furnace before loading, against such an excess weight of the furnace bottom block To reduce the weight.
However, since such a weight reduction process will be performed before carrying out at the installation site of the blast furnace, it is not suitable for the purpose of the furnace ring large block construction method to reduce the work process at the installation site, This is an obstacle to shortening the overall construction period.

On the other hand, it is conceivable to increase the number of dollies that support the furnace body support frame for the excess weight of the furnace bottom block.
However, the size of the space on the lower surface side of the furnace support frame is limited, and the number of dollies is restricted. By increasing the planar shape of the support frame for the furnace body, the number of dollies that can be accommodated can be increased. However, when the load of the bottom block to be placed is concentrated in the center while the load support by the dolly is dispersed, it is necessary to take measures such as greatly increasing the rigidity of the mounting surface of the furnace support platform In reality, it is difficult to adopt.

Furthermore, it is conceivable to increase the load capacity of the entire furnace support frame by increasing the load capacity of the dolly alone while maintaining the size of the furnace frame support frame.
However, the dolly is a special vehicle with limited use, and the cost of a single unit is high and the frequency of use is not high. Therefore, it is difficult to use a custom-made product, and it is necessary to use an existing standard product.
As described above, weight restrictions are inevitable for the transportation of the furnace bottom block by the furnace body support frame using the dolly, and the weight reduction process as described above is indispensable.

  A main object of the present invention is to provide a ring block transfer device and a blast furnace furnace refurbishment method capable of avoiding weight restrictions in transfer of a blast furnace bottom.

  The present invention is a ring block transfer device for transferring a plurality of ring blocks constituting a furnace body of a blast furnace between a blast furnace installation site and a work site different from the installation site, A transport path installed between the work site, a transport platform having a mounting surface slidable on the transport path and formed on the upper surface so as to be aligned with the height of the foundation of the furnace body; A lower sliding means formed between a conveying path and a bottom surface of the conveying mount; and an upper sliding means formed between the mounting surface and the bottom surface of the ring block. And

  In the present invention as described above, a transport path is set in advance between the installation site and the work site, and a transport base, a lower sliding means, and an upper sliding means are configured on the transport path. In carrying, the ring block is moved by the upper sliding means and placed on the placing surface of the carrier. Then, the transportation platform is driven by traction means or the like installed in the transportation path, and these are moved along the transportation path. At this time, the transfer platform and the transfer path are slid by the lower sliding means, and efficient transfer can be performed by applying a low friction mechanism or a sliding material to the lower sliding means. As a result, the transportation platform can be transported without a conventional dolly.

The transfer device of the present invention can be used when transferring the ring block from the installation site to the work site when dismantling the blast furnace, and also transporting the ring block from the work site to the installation site when constructing the blast furnace. You can use it when you want. In this case, the arrangement of the traction means installed on the conveyance path is adjusted according to the conveyance direction to obtain an appropriate traction direction.
In the transfer apparatus of the present invention, the ring block to be transferred is not limited to the furnace bottom block, and can be used for transferring other blocks.
In the transport apparatus of the present invention, as the means for moving the transport gantry along the transport path, traction means disposed on the extension of the transport path, traction means or drive means disposed along the transport path is used. be able to. As the traction means, a traction mechanism combining a wire and a winch can be used, and a traction mechanism or a drive mechanism using a jack or other hydraulic device may be used. Furthermore, a self-propelled towing vehicle may be used, or a combination of these may be selected as appropriate.

In the transport apparatus of the present invention, the following specific configuration can be further adopted.
It is desirable that the transport path is configured by connecting one or more straight section transport paths and includes the traction means on an extension line for each section transport path.
Preferably, the traction means has a plurality of traction mechanisms installed in parallel in the width direction of the section conveyance path, and has traction control means for synchronizing the traction operations of the traction mechanisms.
By such pulling control, it is possible to prevent skewing (tilt with respect to the moving direction) or meandering (repetition of displacement in the width direction with respect to the moving direction) of the carrying platform towed along the transfer path.

The traction control means includes a position detector that detects a movement amount in the traction direction in each towed portion corresponding to each of the traction mechanisms of the transportation platform, and the traction of the transportation platform from each detected movement amount. It is desirable to have a skew detection unit that determines a tilt with respect to a direction and a skew correction unit that corrects the operation of each traction mechanism so that the tilt is reduced.
By using such detection or calculation of each traction mechanism for each system, the movement amount control or synchronization of each traction mechanism can be easily and reliably performed. For specific control, existing machine control technology can be used as appropriate, and can be realized as appropriate using a programmable control device and software.

The skew detection unit calculates an average value of the movement amounts, calculates a deviation between the average value and the movement amounts, and the skew correction unit calculates the deviations for the traction mechanisms. It is desirable to correct the correction amount according to the above.
In this way, by adjusting each traction mechanism based on the deviation from the average value, the conveyance platform is deformed by traction, and the displacement (advance / delay) of the movement amount at each traction position in the width direction is linear. Even when the performance is not maintained, it is possible to make corrections with an optimal correction amount for each towed part and adjust the direction in which the deformation is eliminated.

  In addition, the meandering prevention of the conveyance platform with respect to the conveyance path is not limited to the meander prevention method based on the above-described skew prevention by the traction control, but a mechanical engagement structure between the conveyance path and the conveyance platform, or the conveyance You may employ | adopt the mechanical meander prevention mechanism using the cross-sectional shape of the conveyance direction crossing direction of a path | route and the conveyance mount frame. These meandering prevention methods and meandering prevention mechanisms may be used in combination.

It is desirable that the transport path is extended to the work site, and the transport platform can be accommodated in the work site while the ring block is placed.
By extending the transfer route to the work site in this way, the ring block can be disassembled or manufactured on the transfer stand placed in the work site portion of the transfer route. This eliminates the need to re-transfer, and further shortens the work period.

In the transport apparatus of the present invention, the lower sliding means includes a sliding member laid on the transport path and a sliding member mounted on the bottom surface of the transporting platform, and the pair of sliding members are connected to each other. The pair of sliding members are either a combination of plate materials, one is a plate material and the other is a combination of long materials, or both are combinations of long materials. and the sliding member is steel, which is composed of stainless steel or low-friction plywood, and it is as possible out of.
Since the effects of these specific configurations will be described later in a method for refurbishing a blast furnace furnace body, redundant description is omitted here.

In the transport apparatus of the present invention, the upper sliding means includes a sliding member laid on the mounting surface and a sliding member mounted on the bottom surface of the ring block, and the pair of sliding members are mutually connected. The pair of sliding members are either a combination of plate materials, one is a combination of plate materials and the other is a long material, or both are a combination of long materials. and the sliding member is steel, which is composed of stainless steel or low-friction plywood, and it is as possible out of.
The upper sliding means may be configured by mounting a floating conveying means that floats and moves on the mounting surface by the ejection of fluid between the bottom surface of the ring block and the mounting surface.
Since the effects of these configurations will be described later in a method for refurbishing a blast furnace furnace body, redundant description is omitted here.

The upper sliding means is preferably extended from the mounting surface to the foundation.
In the present invention, since the upper sliding means is continuously formed from the mounting surface to the foundation, smooth sliding can be realized and work efficiency can be improved.

In the transfer apparatus according to the present invention, it is preferable that the transfer apparatus has an intermediate frame that is installed between the foundation and the transfer path and has a flat upper surface and is formed at the same height as the placement surface.
In such this invention, the space | interval between a conveyance mount frame and a foundation can be supplemented by the intermediate mount frame. In other words, there is a gap between the transportation platform and the foundation, such as when the transportation route cannot be installed close enough to the foundation due to interference with structures around the foundation, or when the transportation platform cannot be approached close to the foundation. May end up. Even in such a case, by using the intermediate frame, it is possible to relay between the carrier frame and the foundation, and the ring block can be reliably moved between the carrier frame and the foundation.

The present invention cuts a furnace body installed at an installation site in a horizontal direction and divides it into a plurality of ring blocks, transports the ring block from the installation site to the work site, and further connects the ring block at the work site. A method of repairing a blast furnace furnace body including a dismantling process group to be dismantled, and as the dismantling process group, a transport path from the installation site to the work site, a slide surface on the transport path, and a mounting surface on the upper surface And a preparation step of preparing a lower slide means formed between the transfer path and the bottom surface of the transfer stand, and the height of the mounting surface as described above In the horizontal direction, the separation step of horizontally cutting between the upper portion of the furnace body and cutting the furnace bottom block, and moving the furnace bottom block in the horizontal direction on the mounting surface Transfer process to be placed and before Wherein the carrying frame mounted with the hearth block, to slide on the transport path by the lower sliding means, to include a conveying step of moving to the work site along the transport path And

In the present invention, when the furnace body is disassembled, the furnace bottom block is placed on the transportation platform, and the transportation platform is moved along the transportation path. At this time, the conveyance platform and the conveyance path can be moved by using the traction means or the like described later appropriately by allowing the lower sliding means to slide relative to each other, thereby avoiding the use of the dolly. be able to. In addition, since the transfer path is continuously installed from the installation site to the work site, the desired sliding performance can be ensured between the transfer route and the transfer gantry over the entire length.
As order to ensure the slidability between the transport route and the transportation platform can lower sliding means, as will be described later, slidably brought into contact with each other a pair of sliding members, a predetermined material on each Any existing friction reduction technology such as a method using a sliding member can be used as appropriate.

In the method for refurbishing a blast furnace furnace according to the present invention, when cutting the foundation of the furnace body in the horizontal direction in the separation step, a plurality of cutting sections parallel to the transfer direction in the transfer step are set in a planar shape. In each cutting section, the height position of the mounting surface and the position above the predetermined mounting surface are horizontally cut to form a lower cutting surface and an upper cutting surface, and between the upper and lower cutting surfaces. The gap portion is removed to form a gap, a sliding member extending in the moving direction of the transfer step is disposed on the upper surface of the lower cut surface, and a load support member is disposed on the upper surface of the sliding member. It is desirable to fill the gaps, repeat the formation of the respective cut surfaces or the filling of the gaps in all sections, and carry out the above until the blast furnace is blown off.
Here, it is desirable to use a wire saw for horizontal cutting of each section. When cutting with a wire saw, it is desirable to make a through hole in the boundary portion of each section of the foundation first. As the load support member filled in the gap, it is desirable to ensure performance capable of transmitting the load from above the corresponding section downward after being filled. Examples of such materials include HPA (high pack anchor, fiber bag filled with mortar), alpha material (garnet, small spherical particles, one or a combination of two or more mortars), Alternatively, a combination of these can be selected as appropriate.

In such this invention, a sliding member can be installed easily and reliably using the space | gap part formed between the upper and lower horizontal cut surfaces. Since this gap portion is filled with the load support member after the sliding member is installed, the load supporting performance of the foundation upper portion or the furnace bottom block above the cut portion can be recovered. In particular, since the above-described cutting or filling is performed for each cutting section, the height of the base upper part or the furnace bottom block above the cutting part can be kept constant, and the above-described cutting is performed stably in all the sections. The sliding member can be installed and the load supporting member can be filled.
In addition, regarding the cutting by the wire saw for each section, and the installation of the sliding member and the load supporting member, details are proposed in the international application PCT / JP2007 / 060043 or Japanese Patent Application No. 2006-138733 by the present applicant. .
In the present invention, by cutting off these foundation parts or preparing to carry out the furnace bottom block before the blast furnace is blown out (stopped operation), the furnace bottom block is carried out immediately after the blowing. The time required for refurbishing the blast furnace can be minimized.

In the repair method of the present invention including the above-described dismantling process group, the present invention provides a transport path from the work site to the installation site as a construction process group for constructing a furnace body at the installation site, and on the transport path. A preparatory step for preparing a slidable transport base having a mounting surface on the upper surface, and a lower sliding means formed between the transport path and the bottom surface of the transport base; and The manufacturing process for manufacturing the furnace bottom block on the mounting surface, and the transfer platform on which the furnace bottom block is placed are slid on the transfer path by the lower sliding means. is a conveying step of moving to the installation site along the transport path, a transfer step of moving the furnace bottom block from the mounting surface and horizontally onto foundation of the installation site, the ring block Sequentially connect to form the furnace body Characterized in that it comprises a connecting step.

Alternatively, the present invention includes a construction process group in which a plurality of ring blocks are manufactured at a work site, the ring blocks are transported from the work site to an installation site, and the ring blocks are connected at the installation site to construct a blast furnace. A method for repairing a blast furnace body including a transport path from the work site to the installation site, a transport platform that is slidable on the transport path and has a mounting surface on the upper surface, as the construction process group. A preparation step for preparing a lower sliding means formed between the transfer path and the bottom surface of the transfer stand; and the transfer stand is arranged at the work site, and the furnace bottom is placed on the placement surface. A manufacturing process for manufacturing a block, and the transfer platform on which the furnace bottom block is placed are slid on the transfer path by the lower sliding means and moved to the installation site along the transfer path. Transport process And a transfer step of moving the furnace bottom block horizontally from the placement surface to the foundation of the installation site, and a connection step of sequentially connecting the ring blocks to form a furnace body. Good.

In the present invention, in constructing the furnace body, the furnace bottom block is manufactured on the transportation platform at the work site, and the transportation platform is moved along the transportation route and transported to the installation site. And a furnace body can be constructed | assembled by fixing a furnace bottom block on the foundation in an installation field, and connecting a ring block in the upper direction sequentially.
At this time, the conveyance platform and the conveyance path can be moved by using the traction means or the like described later appropriately by allowing the lower sliding means to slide relative to each other, thereby avoiding the use of the dolly. be able to. In addition, since the transfer path is continuously installed from the installation site to the work site, the desired sliding performance can be ensured between the transfer route and the transfer gantry over the entire length.
In order to secure the sliding performance between the transport path and the transport gantry as the lower sliding means, as will be described later, a pair of sliding members are slidably brought into contact with each other, and a predetermined material is used for each. The existing friction reduction technology such as a method using the sliding member can be used as appropriate.

In the method for repairing a blast furnace furnace according to the present invention, in the preparation step, the transport path is arranged in a straight line, and traction means is installed on an extension line on the side farther from the foundation of the transport path, and the transport process Then, it is desirable to pull the transfer platform by the pulling means and move it along the transfer path.
In the present invention, it is possible to move the transportation platform on the transportation path using the pulling means. At this time, by arranging the conveyance path in a straight line, it is possible to reliably move only by towing the towing means without using a guide or the like for changing the direction.
In the present invention, as the traction means, a traction mechanism combining an existing wire and a winch can be used.

In the method for refurbishing a blast furnace furnace according to the present invention, the following specific configuration can be further employed.
In the preparation step, a plurality of linear section transport paths are connected to form the transport path, and the traction means is installed on the extension line for each section transport path, and transport is performed in the transport process. It is desirable to sequentially connect the furnace bottom block to the traction means on the downstream side.
In the present invention as described above, it can be bent for each section, and the position freedom between the installation site and the work site and the freedom of the arrangement of the conveyance path can be obtained while obtaining the benefits of adopting the linear traction described in the previous section. The degree can be secured.

As the traction means, a plurality of traction mechanisms installed in parallel in the width direction of the section conveyance path, and traction control means for synchronizing the traction operation of each traction mechanism, each traction mechanism is controlled by the traction control means. It is desirable to synchronize the traction operations of the traction mechanism and control the movement amount of each to-be-towed portion of the transfer platform to be pulled by the traction mechanisms to be constant.
By such pulling control, it is possible to prevent skewing (tilt with respect to the moving direction) or meandering (repetition of displacement in the width direction with respect to the moving direction) of the carrying platform towed along the transfer path.

The traction control means detects the amount of movement in the traction direction at each towed portion corresponding to each traction mechanism of the conveyance platform, and the inclination of the conveyance platform with respect to the traction direction is determined from each detected amount of movement. It is desirable to determine and correct the operation of each traction mechanism so that the inclination of the operation of each traction mechanism decreases.
By using such detection or calculation of each traction mechanism for each system, the movement amount control or synchronization of each traction mechanism can be easily and reliably performed. For specific control, existing machine control technology can be used as appropriate, and can be realized as appropriate using a programmable control device and software.

In determining the inclination, an average value of the movement amounts is calculated, a deviation between the average value and the movement amounts is calculated, and the traction mechanism is corrected with a correction amount corresponding to the deviation. It is desirable to do.
In this way, by adjusting each traction mechanism based on the deviation from the average value, the conveyance platform is deformed by traction, and the displacement (advance / delay) of the movement amount at each traction position in the width direction is linear. Even when the performance is not maintained, it is possible to make corrections with an optimal correction amount for each towed part and adjust the direction in which the deformation is eliminated.
In addition, the meandering prevention of the transportation platform with respect to the transportation path is not limited to the meandering prevention method based on the above-described skew prevention by the traction control, but a mechanical engagement structure between the transportation path and the transportation platform, or transportation. You may employ | adopt the mechanical meander prevention mechanism using the cross-sectional shape of the conveyance direction crossing direction of a path | route and the conveyance mount frame. These meandering prevention methods and meandering prevention mechanisms may be used in combination.

In the method for refurbishing a blast furnace furnace according to the present invention, the transfer route is extended to the work site, and the work is performed on the ring block on the transfer stand on the transfer route in the work site. It is desirable.
By extending the transfer route to the work site in this way, the ring block can be disassembled or manufactured on the transfer stand placed in the work site portion of the transfer route. This eliminates the need to re-transfer, and further shortens the work period.

  In the method for refurbishing a blast furnace furnace according to the present invention, the lower sliding means includes a sliding member laid on the transfer path and a slide member mounted on the bottom surface of the transfer stand. The pair of sliding members is a combination of plate materials, one is a combination of plate materials and the other is a combination of long materials, and both are combinations of long materials. It is desirable that each sliding member is made of steel, stainless steel or low friction plywood.

  In the method for refurbishing a blast furnace furnace according to the present invention, the upper sliding means includes a sliding member laid on the mounting surface and a sliding member mounted on the bottom surface of the furnace bottom block. The sliding member is configured to be slidably brought into contact with each other. The pair of sliding members is a combination of both plate materials, one is a plate material and the other is a long material, and both are a combination of long materials. It is desirable that each sliding member is made of steel, stainless steel or low friction plywood.

In such this invention, it can implement easily and can suppress cost by using a general board | plate material and a type | mold material. A lubricant or the like may be applied between the pair of sliding members.
By using a plate material as the sliding member, an increase in thickness associated with the installation of the sliding member can be minimized. By using the long material, for example, it can be intermittently installed instead of the entire surface of the conveyance path, and ground leveling of the ground can be simplified. When using a long mold material, it is desirable that the longitudinal direction thereof coincides with the transport direction. For example, when a long mold material is used for a conveyance path, the ground surface may be leveled and may be embedded from the ground surface by an amount corresponding to the height of the long mold material.

By using a steel material or a stainless material as a basic material as the material of the sliding member, implementation can be facilitated and cost can be reduced.
As the low friction plywood that can be used for the sliding member, those having a low friction coefficient including PTFE (tetrafluoroethylene), for example, Pillar Fluoro Gold manufactured by Nippon Pillar Industries Co., Ltd. can be used. It is desirable to use a material made of lubricant.
By using such a low friction plywood, the sliding performance can be greatly improved while being a thin plate material. However, since the cost is higher than that of steel and stainless steel, it is desirable to use only on the bottom side of the furnace bottom block. Also in other materials, it is desirable to use a low cost material on the transport path side or the placement surface side which is a long distance.

In the method for refurbishing a blast furnace furnace according to the present invention, the upper sliding means includes a levitation conveying means that floats and moves on the placement surface by a fluid jet between the bottom surface of the ring block and the placement surface. You may install and comprise.
As such a levitation conveyance means, an apparatus such as an existing air caster that jets compressed air to the bottom surface side to form a thin film of pressurized air between the flat floor surface and utilizes friction is used. be able to.
In such this invention, it is not necessary to install a continuous sliding member by using a levitation conveyance means.

  According to the blast furnace furnace repair method and the ring block transfer device of the present invention as described above, the conventional process for reducing the weight of the furnace bottom can be omitted. In the conventional weight reduction process: 1. Opening of bottom mantel (iron skin), 2. Removal of in-furnace coke, residue, iron slag, stave cooler, refractory bricks, etc. A series of operations such as temporary construction required for these operations (slope creation / removal for construction machinery introduction, removal of furnace pipes and obstacles such as decks) are no longer necessary, and are necessary in the unloading process by the dolly. The repair period will be shortened by at least 7 days.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1 and 2, a blast furnace 1 is installed at an installation site 2, a furnace body 3 is constructed on a foundation 4, and a furnace body cage 5 that supports the furnace body 3 is installed around the furnace body 3. In dismantling, the furnace body 3 is divided into a furnace bottom block 6 and an upper ring block 7 and is carried out.
In carrying out, the ring block 7 is suspended and supported by a jack (not shown) installed in the furnace body 5. The unloaded furnace bottom block 6 and ring block 7 are transported to a work site 8 at a distant position and disassembled individually.

The furnace bottom block 6 has an iron skin 6A on the outside, and refractory bricks 6B are installed on the inner periphery and bottom surface thereof. Residues 6C and 6D that have been cooled and solidified after the blast furnace 1 has been blown are deposited on the bottom surface of the furnace.
The foundation 4 is configured by stacking fire bricks on the installation site.
The dismantling method of the blast furnace body based on the present invention is applied to the dismantling of the furnace body 3 of the blast furnace 1 described above. In order to use this method, a transfer device 10 according to the present invention is installed from the installation site 2 to the work site 8.

  The transport apparatus 10 includes a transport path 20 from the installation site 2 to the work site 8, a transport base 30 that can slide on the transport path 20 and that has a placement surface 31 on the upper surface, and a transport path 20 and a transport base 30. And a lower sliding means 40 formed between the bottom surface 32 and an upper sliding means 50 between the placing surface 31 of the carrier 30 and the furnace bottom block 6.

The conveyance path 20 includes a plurality of base rails 21 arranged along the longitudinal direction of the path 20 and a large number of sliding plates 41 spread on the upper surface thereof.
As shown in FIG. 3, each of the foundation rails 21 is a long steel H-shaped material, and is embedded so that the upper surface thereof is at the ground surface height. Regarding the ground in which the foundation rails 21 are embedded, the furnace bottom block 6 is a heavy object ranging from 5000 to 8000 tons. Therefore, it is desirable to appropriately reinforce the ground so as to withstand the weight. The existing civil engineering technique may be adopted as appropriate for the ground reinforcement means or the structure in which the foundation rail 21 is embedded.
The sliding plate 41 is a strip-shaped plate material, which is attached in close contact with the upper surface of the foundation rail 21 and is sequentially connected so that no step is generated on the surface. The sliding plate 41 constitutes the lower sliding means 40.

The conveyance path 20 includes two section conveyance paths 20A and 20B.
Each of the section transport paths 20A and 20B is linear, but the section transport path 20B is connected in the orthogonal direction to the downstream end (the side far from the installation site 2) of the section transport path 20A so that the whole is L-shaped. Is arranged.
This is a configuration that is used when the installation site 2 to the work site 8 cannot be connected by a linear route. What is necessary is just to install one linear conveyance path | route, without using.

Pulling means 29 (29A, 29B) is installed on the extension line on the downstream side of each section conveying path 20A, 20B. The traction means 29A and 29B are constituted by one or a plurality of traction mechanisms, and in this embodiment, the traction mechanism is a winch or the like, and each is connected to the conveyance platform 30 via wires 28 (28A and 28B). . In the present embodiment, the traction mechanism is disposed in a pair on both sides with respect to the width direction of the transport paths 20A and 20B (the width direction of the transport stand 30).
As will be described later, by pulling the transportation platform 30 with these pulling means 29 (each winch and wire 28), the transportation platform 30 is transported along the transportation path 20. That is, the transportation platform 30 is pulled from the installation site 2 by pulling the transportation platform 30 by the traction means 29A in the section transportation path 20A and by pulling the transportation platform 30 by the traction means 29B in the section transportation path 20B. It can be transported to the site 8.

The end of the conveyance path 20 (section conveyance path 20B) is extended to the inside of the work site 8.
Thereby, the transportation platform 30 can enter the work site 8 with the ring block placed thereon, and the work site 8 can accommodate the transportation platform 30 on which the ring block is placed.
Furthermore, it is possible to manufacture a new ring block on the transportation platform 30 on the transportation path 20 extended into the work site 8.

As the traction means 29, a traction mechanism of an arbitrary drive system such as a hydraulic jack as well as a winch can be used. The pulling means 29 only needs to be able to generate a driving force that exceeds the resistance between the transportation platform 30 and the transport path 20 (such as frictional resistance in the lower sliding means 40 described later). As described above, the traction means 29 may be provided with one or a plurality of traction mechanisms such as a winch or a hydraulic jack. When a plurality of traction mechanisms are used, the total driving force is the same as that of the conveyance path 20 described above. It only has to exceed the resistance between.
The main function of the traction means 29 is to apply a driving force to the transportation platform 30, but it is desirable to consider the meandering prevention of the transportation platform 30.
For example, when meandering of the transportation platform 30 (bias in the traveling direction) occurs, the driving force of a plurality of winches is adjusted according to the situation so that the traveling direction of the transportation platform 30 returns to the normal path. It is desirable to avoid meandering. For detecting the meandering of the transport gantry 30, linear encoders or the like that detect displacement relative to the transport path 20 are provided on both sides of the transport gantry 30, or a rotary encoder that measures the winding amount of the wire 28 in each side winch. For example, existing measurement technology may be used as appropriate.
Such meandering prevention by adjusting the pulling means will be described in detail later.

The transport pedestal 30 is a box-like structure composed of a steel frame or the like, and its upper surface is a mounting surface 31 on which the furnace bottom block 6 and the ring block 7 can be mounted, and its bottom surface 32 is a lower part. It is supported by the conveyance path 20 via the sliding means 40.
A plurality of sliding plates 42 are stretched on the bottom surface 32. The sliding plate 42 constitutes the lower sliding means 40 together with the sliding plate 41 of the transport path 20.

A large number of sliding plates 51 are arranged on the mounting surface 31 of the transportation platform 30, and traction means 39 is installed on the side far from the blast furnace 1.
The sliding plate 51 is a strip-shaped plate material, which is affixed on the mounting surface 31 and sequentially connected so that no step is generated on the surface. The sliding plate 51 constitutes the upper sliding means 50 and is continuously installed up to a cutting portion 4A of the foundation 4 described later.

The pulling means 39 is a winch or the like, a pair of which is disposed on both sides of the mounting surface 31, and is connected to the furnace bottom block 6 via the wires 38. Brackets 6E are attached to both sides of the furnace bottom block 6, and the wires 38 are connected to the brackets 6E. Therefore, the furnace bottom block 6 is transferred from the foundation 4 to the mounting surface 31 by being pulled by the pulling means 39 via the wire 38.
Note that the pulling means 39 can adopt the same configuration as the pulling means 29 described above as appropriate.

The lower sliding means 40 is configured by the above-described sliding plate 41 of the transport path 20 and the sliding plate 42 stretched on the bottom surface 32 of the transport base 30.
As shown in FIG. 3, the opposing surfaces of the sliding plates 41 and 42 slide relative to each other when the transportation platform 30 moves on the transportation path 20. In order to reduce the frictional resistance during the sliding, the material of the sliding plates 41 and 42 is selected.
In this embodiment, the sliding plate 41 (long) on the conveyance path 20 side is a steel plate, and the sliding plate 42 (relatively short) on the conveyance stand 30 is a stainless steel plate. It is said that.

  In the present embodiment, the base 4 is formed with a cutting portion 4 </ b> A according to the height of the placement surface 31. This cutting part 4A separates the foundation upper part 4B carried out integrally with the furnace bottom block 6 and the foundation lower part 4C remaining on the installation site 2 when the furnace bottom block 6 is carried out. 4D is secured and the upper sliding means 50 is comprised in the inside.

An intermediate pedestal 60 is installed between the foundation 4 and the transfer pedestal 30, and the upper surface of the lower base 4C and the placement surface 31 of the transfer pedestal 30 form a series of surfaces through the upper surface of the intermediate pedestal 60. It is configured.
A plate material to be the sliding plate 51 is stretched on the upper surface of the base lower portion 4C, the upper surface of the intermediate frame 60, and the mounting surface 31 of the transfer frame 30, and a series of these end portions are joined together. A sliding plate 51 is formed.
The series of sliding plates 51 is cut at a boundary portion with the intermediate mount 60 prior to the movement of the transfer mount 30. In cutting, an appropriate means such as a burner may be employed.

The upper sliding means 50 includes a sliding plate 51 on the transfer platform 20 side from the upper surface of the foundation lower portion 4C to the upper surface of the mounting surface 31, a sliding plate 52 on the bottom surface side of the foundation upper portion 4B, that is, the furnace bottom block 6 side. Consists of.
As shown in FIG. 3, the opposing surfaces of the sliding plates 51 and 52 slide relative to each other when the furnace bottom block 6 is transferred to the transportation platform 30. In order to reduce the frictional resistance during the sliding, the material of the sliding plates 51 and 52 is selected.
In the present embodiment, the sliding plate 51 (which is long) on the transfer platform 20 side is made of steel, and the sliding plate 52 (which is relatively short) on the furnace bottom block 6 side is made of stainless steel. It is considered as a plate material.

The plate material used for the sliding plates 41, 42, 51, and 52 desirably has a thickness of about 6 to 36 mm. For example, the furnace bottom block 6 is a heavy object ranging from 5000 to 8000 tons, and the surface pressure of the sliding surface of these sliding plates is extremely high, and it is desirable to ensure a plate thickness of 6 mm or more. On the other hand, when the plate thickness is 36 mm or more, it is not preferable in terms of cost, and the handling is also difficult due to its weight. Therefore, it can be said that the plate thickness of 6 to 36 mm described above is desirable.
The means for fixing the sliding plates 41, 42, 51, 52 to the respective installation sites is not particularly limited, and the material of the adherend site, such as fastening by bolts and nuts, fixing by welding or the like, is also considered. May be selected as appropriate.
It is desirable to apply a lubricant such as carbon powder or grease to the sliding surfaces of the sliding plates 41, 42, 51, 52 during transport.

In processing the cutting portion 4A with respect to the foundation 4, the following procedure is adopted.
First, a plurality of parallel cutting sections 4G (see FIG. 2) in the planar shape are set, and the following operations are performed in each cutting section.
In FIG. 1, the height of the mounting surface 31 is horizontally cut to form the lower cut surface 4E, and the position above the mounting surface 31 is horizontally cut to form the upper cut surface 4F. To do. A portion between these upper and lower cut surfaces is removed to form a gap 4D, and sliding plates 51 and 52 are placed on the upper surface of the lower cutting surface 4E. 53 is arranged to fill the gap 4D.
By repeating these operations in all the cutting sections 4G, the sliding plates 51 and 52 and the load supporting member 53 can be arranged over the entire surface of the cutting portion 4A.

In addition, it is desirable to use a wire saw for horizontal cutting of each section 4G. When cutting with a wire saw, it is desirable to make a horizontal through-hole in the boundary portion (shown with a dotted line in FIG. 2) of each basic section 4G first.
As the load support member 53, for example, HPA 54 (high pack anchor, fiber bag filled with mortar) and α material 55 (garnet, small spherical particles, one or more kinds of mortar) The combination arrangement (see FIG. 3) can be used, but the arrangement of only the HPA 54 or the arrangement of only the α material 55 may be used.
In addition, Japanese Patent No. 384201, Japanese Patent Application Laid-Open No. 2006-183105, Japanese Patent Application Laid-Open No. 2006-283183, and International Publication No. WO2007 / 135916 by the present applicant describe a load support member or a slide that can also be used as the upper sliding means 50 or the lower sliding means 40. There is a description of a structure including a moving member. These techniques may be appropriately used in the present invention.
However, the present invention is not limited to these, and other configurations may be adopted as long as sufficient load supporting performance and sliding performance can be obtained.

In the present embodiment, the furnace body is disassembled in the following procedure using the transfer apparatus 1 as described above.
In the preparatory process shown in FIG. 4, the transport path 20 is installed from the installation site 2 where the furnace body 3 and the foundation 4 are installed to the work site 8, and can slide on the transport path 20 and has a mounting surface 31 on the upper surface. A transportation stand 30 is installed. A lower sliding means 40 is formed between the transportation platform 30 and the transportation path 20.
In the separation step shown in FIG. 5, the foundation 4 is cut in the horizontal direction at the height of the mounting surface 31 to form the cut portion 4 </ b> A, and the ring block 7 and the furnace bottom block 6 that are the upper part of the furnace body 3. Is cut horizontally (securing the gap 7A in FIG. 1), and the furnace bottom block 6 is cut out. A series of upper sliding means 50 is formed from the cutting portion 4 </ b> A to the upper surface or the mounting surface 31 of the intermediate frame 60.

In the transfer process shown in FIG. 6, the furnace bottom block 6 and the foundation upper part 4 </ b> B are moved in the horizontal direction by the upper sliding means 50 and placed on the placement surface 31.
In the transfer process shown in FIG. 7, the transfer platform 30 on which the furnace bottom block 6 and the upper base 4 </ b> B are placed is moved along the transfer path 20 to the work site 8. At this time, the friction between the carrier base 30 and the conveyance path 20 is reduced by the lower sliding means 40, and the movement by the traction means 29 (see FIGS. 1 and 2) is performed stably and reliably. Is called.
The conveyance path 20 of the present embodiment is connected to the section conveyance paths 20A and 20B, and the traction means 29A and 29B are reconnected at each connection portion.

  That is, in FIG. 2, the transportation platform 30 is connected to the traction means 29 </ b> A by the wire 28 </ b> A at the upstream end (the left end in the figure, a position adjacent to the installation site 2) of the section transport path 20 </ b> A. Towed. When the transportation platform 30 reaches the downstream end of the section transportation path 20A, the wire 28A is removed and connected to the traction means 29B by another wire 28B. And it is pulled by the traction means 29B, and is conveyed from the upstream end (upper part in the figure) of the section conveyance path 20B to the work site 8 at the downstream end (lower part in the figure).

In this embodiment, the furnace bottom block 6 can be placed on the transportation platform 30, and the transportation platform 30 can be moved along the transportation path 20 to perform transportation. At this time, the transport gantry 30 and the transport path 20 can be easily moved using the traction means 29 by allowing the lower slide means 40 to slide relative to each other. Therefore, in this embodiment, it is not necessary to use any dollies, and prior weight adjustment can be omitted.
Moreover, since the conveyance path | route 20 is continuously installed from the installation site 2 to the work site 8, the expected sliding performance can be ensured between the conveyance path 30 and the conveyance stand 30 over the full length.

In the present embodiment, by arranging the transport path 20 in a straight line, it is possible to reliably move only by towing by the towing means 29 without using a guide or the like for changing the direction. And since the combination of the existing wire and winch is used as the traction means 29, the conveyance platform 30 can be pulled with a simple structure.
Further, since the conveyance path 20 is connected to the section conveyance paths 20A and 20B, each of the conveyance paths 20 can be arranged in the crossing direction and bent as the whole path, and while gaining the benefits of linear traction, the installation site 2 and the work site 8 can be secured, and the degree of freedom of arrangement of the transport path can be ensured.

In the present embodiment, since the sliding plates 41 and 42 made of steel and stainless steel are used as the lower sliding means 40 between the transport path 20 and the transport pedestal 30, the desired slide is achieved with a simple structure. Dynamic performance can be secured and equipment costs can be reduced.
In this embodiment, since the sliding plates 51 and 52 made of steel and stainless steel plate materials are used as the upper sliding means 50 between the transportation platform 30 and the furnace bottom block 6, the desired structure is achieved with a simple structure. Sliding performance can be ensured and equipment costs can be reduced.
In the present embodiment, the upper sliding means 50 of the base 4 portion is installed in the separation process, and the processing for each section of the cutting portion 4A is performed for the installation, and the load support member 53 is used. Certain work can be performed.

[Other Embodiments Related to the First Embodiment]
In addition, this invention is not limited to the said embodiment, Other embodiment or a deformation | transformation etc. which are described below are also included in this invention.
For example, in the above-described embodiment, the lower sliding means 40 is based on the sliding plate 41 stretched on the upper surface of the base rail 21 of the transport path 20 and the slide plate 42 stretched on the bottom surface 32 of the transport rack 30. Although it was set as the structure (refer FIG. 3), not only this but another structure may be sufficient.
For example, in the above-described embodiment, the sliding plate 41 on the conveyance path 20 side is a steel plate material, and the sliding plate 42 on the conveyance stand 30 side is a stainless steel plate material. 41 may be made of stainless steel and the sliding plate 42 may be made of steel, or both may be made of steel.

In the lower sliding means 40, either the conveyance path 20 side or the conveyance platform 30 side is not a plate-like member, but either may be a long material.
In FIG. 8, the base rail 21 embedded in the ground has an upper flange protruding on the ground, and the flange slides as a sliding plate 41 with a sliding plate 42 to form a lower sliding means 40. ing. In this configuration, it is desirable that the base rail 21 is made of steel and the sliding plate 42 is made of stainless steel.
What is embed | buried under the ground as the conveyance path | route 20 is not restricted to the basic rail 21 (refer FIG. 3 and FIG. 8) by H-shaped steel, Other mold steel may be sufficient.
In FIG. 9, the base rail 22 is a cylindrical steel material having a square cross section, and its upper surface is exposed to the ground so as to function as the sliding plate 41. Such lower sliding means 40 may be employed.

  In order to prevent meandering (bias in the traveling direction) of the carrier 30, it is desirable to employ meandering prevention means. As the meandering prevention means, a mechanical meandering prevention mechanism can be employed between the transport path 10 and the transporting pedestal 30 in addition to a software meandering prevention system utilizing control of the traction means 29.

First, a meandering prevention method by control of the traction means 29 will be described.
When the transport platform 30 is towed, either the right side or the left side of the transport platform 30 in the advancing direction is determined by the unbalance of the traction force and the unbalance of the traction speed in the multiple systems of traction mechanisms installed as the traction means 29. There may be a situation (skew) that precedes and delays the other. In such a state where the skew has occurred, the transportation platform 30 moves along the inclined axis, and in a direction (width direction of the transport path 20) intersecting the pulling direction (longitudinal direction of the transport path 20). In some cases, the displacement (lateral deviation) may occur, and when this displacement becomes large, it is pulled back by the traction force by the traction mechanism on the opposite side, and meandering may occur due to repetition of these.
In this meandering prevention system, the towing balance of each system of the towing mechanism of the towing means 29 is taken to prevent the feeding platform 30 from skewing, and to prevent meandering caused by skewing.

FIGS. 10 to 12 show an example in which the meandering prevention method based on traction control is adopted in the transport apparatus 10 of the first embodiment described above.
In FIG. 10, the transport path 20 and the transport pedestal 30 have the same configurations as those shown in FIGS. The traction means 29 includes four traction mechanisms parallel to the width direction of the transport path 20. Each towing mechanism includes winches 291 to 294, and each winch 291 to 294 pulls the carriage 30 by winding up the wires 281 to 284.
As shown in FIG. 11, the traction means 29 refers to the position detectors 295 to 298 that detect the movement amounts of the respective towed positions of the transportation platform 30 by the wires 281 to 284, and the detection positions therefrom. And traction control means 300 for controlling the traction operation of the winches 291 to 294.

The position detectors 295 to 298 can use, for example, a rotary encoder that is installed in the winches 291 to 294 and detects the rotation angle of the wire winding shaft. The amount of winding of the wires 281 to 284 can be integrated from the amount of rotation of the winding shaft, and thereby the amount of movement of each towed position of the transportation platform 30 to which the wires 281 to 284 are connected can be detected.
As the position detectors 295 to 298, a device that directly detects the amount of winding of the wires 281 to 284 in the winches 291 to 294 using an optical displacement detection unit or the like may be used, or the transportation platform 30 may be used. A device that directly detects a relative displacement with respect to the conveyance path 20 by using an optical / magnetic or other displacement detection means provided at each towed portion may be used.

The traction control unit 300 includes an operation command unit 301, a skew detection unit 302, and a skew correction unit 303.
The operation command unit 301 is for instructing activation or towing operation of the winches 291 to 294 based on a pre-recorded operation program. Also, calculation procedures or reference values in the skew detection unit 302 and the skew correction unit 303 are recorded in advance in the operation command unit 301 and referred to as appropriate.
The skew detection unit 302 detects the skew of the transportation platform 30 from the movement distances D1 to D4 of each system of the transportation platform 30 detected by the position detectors 291 to 294. Specifically, the average value DM = (D1 + D2 + D3 + D4) / 4 is calculated from the movement distances D1 to D4, and each deviation dDn = Dn−DM (n = 1 to 4) with respect to the obtained average value DM is calculated. Calculate.

As indicated by the one-dot chain line in FIG. 10, when the transportation platform 30 is in a normal posture along the transportation direction, the movement distances D1 to D4 are equal and dD1 to dD4 are all 0.
As shown by the solid line in FIG. 10, when the transportation platform 30 is skewed and the movement axis is tilted, the movement distances D1 to D4 are different from each other, and the deviations dD1 to dD4 with respect to the average value DM are different from each other. .
When the transportation platform 30 is simply skewed, the deviations dD1 to dD4 are proportional to the distance from the central portion that gives the average value DM.
However, an unbalance between the traction force and the resistance is generated in the width direction of the transporting pedestal 30 when, for example, a large friction is locally generated between the transporting pedestal 30 and the transporting path 20. Deformation occurs in the width direction (for example, in the shape of an arc), and a part of the moving distance Dn and the deviation dDn may show a unique value that is not proportional.

The skew correction unit 303 calculates a correction value so as to correct the skew of the transportation platform 30 detected by the skew detection unit 302, and the pulling operation of the winches 291 to 294 by the operation command unit 301 based on the correction value. Correct.
Specifically, the correction value of each system is calculated by a function f (dDn) based on the deviation dDn detected by the skew detection unit 302, and the rotational speeds V1 to V4 of the winches 291 to 294 of each system are calculated based on this correction value. Perform the correction.

FIG. 12 shows a procedure for controlling the winches 291 to 294 by the traction control means 300 and correcting the control.
At the start of the traction operation, the operation command unit 301 sets the initial value of the traction speed set in advance as the speeds V1 to V4 of each system (step S01), activates the winches 291 to 294, and thereby performs the traction operation. Start (processing S02).
When towing is started, the skew detection unit 302 detects the movement distances D1 to D4 of each system from the position detectors 295 to 298 (processing S03), and calculates the average value DM of the towing distance (processing S04). The deviations dD1 to dD4 of each system are calculated (processing S05).
The skew detection is performed by the above steps S03 to S05.

The obtained deviations dD1 to dD4 are determined by the skew feeding correction unit 303 and used for correction of each system.
The skew correction unit 303 compares a preset reference value dS with the deviations dD1 to dD4 of each system, and corrects if any absolute value of the deviation dDn of any system exceeds the reference value dS. Is determined to be necessary (step S06). When correction is required, the skew feeding correction unit 303 performs correction to increase or decrease the function f (dDn) based on the deviation dDn of each system with respect to the speed Vn of each system (step S07).
It should be noted that the function f used for correction can be set as appropriate during implementation, such as a simple multiplication by a coefficient or a calculation based on a pre-specified calculation formula.
The skew correction is performed by the above steps S06 to S07.

  After the above skew detection or skew correction, the operation command unit 301 continues the towing operation (step S08). The towing operation is performed at the new speed Vn when the correction by the skew correction unit 303 is performed, or at the original speed Vn when the correction is not performed. The operation command unit 301 monitors the progress of towing, and if it has not reached the end point of the transport path 20, it continues to detect skew, correct skew, and tow. On the other hand, when the end point is reached, the towing operation is terminated (step S09).

By such operations (reverse skew detection, skew correction, and pulling operation), the skew of the transport platform 30 pulled along the transport path 20 can be prevented, and meandering accompanying skew can also be prevented.
At this time, the speed correction of each system is performed by calculating the correction value f (dDn) based on the deviation dDn of each system. Therefore, the transport platform 30 is deformed and the deviation dDn of each system is not proportional. Even in this case, an optimal correction value can be used, and correction can be performed so as to compensate for the deformation of the transportation platform 30.

In the present invention, the correction of the traction means 29 is not limited to the procedure of FIG. 12 described above, and a procedure as shown in FIG.
At the start of the traction operation, the operation command unit 301 sets the initial value of the traction speed set in advance as the speeds V1 to V4 of each system (step S11), activates the winches 291 to 294, and thereby performs the traction operation. Start (process S12).
When towing is started, the skew detection unit 302 detects the movement distances D1 to D4 of each system from the position detectors 295 to 298 (processing S13). The above is the same as the procedure of FIG.
In FIG. 13, the skew detection unit 302 uses the movement distances D1 and D4 of the systems on both outer sides of the transportation platform 30 and performs skewing when the absolute value | D1−D4 | of the difference is larger than the reference value dS. (Procedure S14).

If it is determined that the skew has occurred, the skew correction unit 303 detects the preceding side of the skewed carrier 30 (step S15). This leading side detection can be performed, for example, by comparing the movement distances D1 to D4 of the systems on both outer sides. That is, if D1-D4> 0, the first system side is ahead and the fourth system side is behind.
The skew correction unit 303 corrects the speed of each system based on the determination on the preceding side. For example, if the first system side is ahead, the winch 291 on the first system side is decelerated and the winch 294 on the fourth system side is corrected to increase the speed (step S16). On the other hand, if the fourth system side is ahead, the winch 291 on the first system side is accelerated and corrected so that the winch 294 on the fourth system side is decelerated (step S17).
The second system and the third system may be set by proportionally distributing the correction values of the first system and the fourth system according to the arrangement distance of each system.
After the above skew detection or skew correction, the operation command unit 301 continues the towing operation (step S18). When the transportation platform 30 reaches the end point of the transportation path 20, the pulling operation is terminated (step S19).

According to the meandering prevention method as shown in FIG. 10 to FIG. 12 or FIG. 13 as described above, the control device that is normally used for the winch of the traction means 29 is used, and the processing for performing skew detection and skew correction in the control software. It is possible to prevent skew or meandering simply by adding.
For this reason, compared with the case where a mechanical meandering prevention mechanism is added, installation work is easy and cost reduction can be expected.

On the other hand, the following configuration can be employed as a mechanical meandering prevention mechanism.
When a long material is used for the lower sliding means 40, a mechanical meandering prevention mechanism is obtained by making the cross-sectional shape or cross-sectional arrangement uneven, such as changing the height of some long materials with respect to others. In addition, the meandering prevention function of the carrier 30 can be ensured.
For example, in the configuration of FIG. 8 described above, the three basic rails 21 are installed at the same height, but the height of one of the central rails is changed either up or down, and this is used as a meandering prevention mechanism. Can do.

In FIG. 14, three foundation rails 21 are embedded in the ground as in FIG. However, in this example, the two base rails 21 on both sides are at the normal ground level (GL), whereas the one base rail 21 in the center is embedded in the bottom surface of the groove 24 formed on the ground. .
A spacer 33 having a width and a thickness that can be accommodated in the groove 24 is provided on the bottom surface 32 of the carrier 30 at a site corresponding to the groove 24. Sliding plates 41 and 42 are disposed between the base rail 21 in the groove 24 and the bottom surface of the spacer 33 and between the base rail 21 and the bottom surface 32 outside the groove 24, respectively.

The thickness of the spacer 33 is a dimension obtained by subtracting the thickness of the sliding plates 41 and 42 from the depth of the groove 24. Each pair of the sliding plates 41 and 42 is provided inside and outside the groove 24, respectively. It is adjusted to be in an equivalent contact state and to receive an equivalent load.
The contact plate 33A is attached to both side surfaces of the spacer 33, and the contact plate 24A is also attached to the side surface of the groove 24 facing the spacer plate 33A. For the sliding plates 41 and 42 and the contact plates 24A and 33A, the combination of the iron plate and the stainless steel plate described above for the lower sliding member can be used.

In such a configuration, the sliding necessary for the transportation can be obtained while supporting the load of the transportation platform 30 by the sliding plates 41 and 42. Further, the groove 24 and the spacer 33 form a concavo-convex shape that is continuous along the conveyance direction of the conveyance platform 30, and can be used for the meandering prevention function of the conveyance platform 30. In particular, when a large meandering is likely to occur, these contact plates 24A and 33A come into contact with each other, and further meandering can be prevented.
The depth of the groove 24 and the thickness of the spacer 33 may be about 30 to 200 mm, for example. Further, instead of forming the groove 24 on the ground, a groove is formed on the bottom surface of the transportation platform 30 to support the foundation rail embedded in the ground highly, and a meandering prevention mechanism by unevenness opposite to FIG. 14 is formed. May be.

Another structure can be adopted as the meandering prevention mechanism of the transportation platform 30.
In FIG. 15, a large number of foundation rails 21 are embedded in the ground in the same manner as in the configurations of FIGS. However, some of the basic rails 21 are embedded in the normal ground level (GL), whereas the three basic rails 21 in the middle are embedded in the bottom surface of the recess 24B formed in the ground.

The recess 24B has an arc-shaped cross section, and the three basic rails 21 embedded in the part have one central portion arranged horizontally on the upper surface, whereas the two basic rails 21 on both sides are The upper surface is disposed in an inclined state (corresponding to the inclination of the bottom surface of the recessed portion 24B in the embedded portion).
A convex portion 33B corresponding to the cross-sectional shape of the concave portion 24B is provided on the bottom surface 32 of the carrier base 30 at a portion corresponding to the concave portion 24B. Here, the circular arc shape of the bottom surface of the concave portion 24B and the circular arc shape of the bottom surface of the convex portion 33B are concentric with each other, and the mutual interval is constant regardless of the part.

  Sliding plates 41 and 42 are disposed between the base rail 21 in the recess 24B and the bottom surface of the convex portion 33B and between the base rail 21 and the bottom surface 32 outside the recess 24B, respectively. For these sliding plates 41, 42, the combination of the iron plate and the stainless steel plate described above for the lower sliding member can be used.

By adopting such a configuration, mutual sliding can be obtained while the load is supported by the sliding plates 41 and 42. In addition, the concave and convex portions 24B and the convex portions 33B form a concavo-convex shape that is continuous along the transport direction of the transport gantry 30, and can be used as a meandering prevention mechanism for the transport gantry 30. In particular, when large meandering is likely to occur, the contact pressure of the sliding plate 41 mounted on the inclined base rail 21 and the sliding plate 42 sliding on the base plate 21 increases, and further meandering is performed. Can be prevented.
In addition, what is necessary is just to let the recessed part 24B and the convex part 33B be about 30-200 mm in height and about 100-300 mm in width, for example. Moreover, you may form the recessed part 24B and the convex part 33B upside down.

In the configuration of FIG. 15 described above, some of the foundation rails 21 are embedded in the normal ground level (GL), and the three intermediate foundation rails 21 are embedded in the arc-shaped recess 24B. On the other hand, it is also possible to adopt a form in which all the foundation rails 21 are embedded in the arc-shaped recesses, and the entire bottom surface 32 of the carrier 30 is a protrusion.
In FIG. 16, the entire bottom surface 32 of the transportation platform 30 is a convex portion 33 </ b> C. On the other hand, a concave portion 24C dug down from the normal ground level (GL) is formed on the ground. The convex portion 33C and the concave portion 24C are concentric cylindrical surfaces, and a constant interval can be maintained between them.
A plurality of foundation rails 21 are embedded in the recess 24 </ b> C, and sliding plates 41 and 42 are disposed between the foundation rails 21 and the bottom surface 32, respectively. For these sliding plates 41, 42, the combination of the iron plate and the stainless steel plate described above for the lower sliding member can be used.

By adopting such a configuration, similarly to the configuration of FIG. 15 described above, the concave and convex portions 24C and the convex portions 33C form a concavo-convex shape that is continuous along the transport direction of the transport stand 30. It can be used as a meandering prevention mechanism. In particular, a stronger arc-shaped unevenness using the entire bottom surface 32 of the carrier 30 can provide a more powerful meandering prevention function.
In addition, what is necessary is just to let the recessed part 24C and the convex part 33C be about 30-200 mm in height and about 100-300 mm in width, for example. Moreover, you may form the recessed part 24C and the convex part 33C upside down.

When the meandering prevention mechanism as shown in FIGS. 14, 15, and 16 is formed, it is difficult to change the direction as compared with the case where the sliding plates 41 and 42 are all in sliding contact with each other in the same plane. For this reason, it is desirable to use a separate transfer means in combination for the transfer of the section transport paths 20A and 20B.
On the other hand, as a mechanical meandering prevention mechanism that can cope with direction change, the following configuration can be adopted.

In FIG. 17, one guide pin 321 is installed on the bottom surface 32 of the carrier base 30. In the conveyance path 20, the guide groove 322 (the guide groove 322A in the section conveyance path 20A and the guide in the section conveyance path 20B) is provided in the interval 411 of the slide plate 41 (the interval 411A in the section conveyance path 20A and the interval 411B in the section conveyance path 20B). A groove 322B) is formed.
As shown in FIG. 18, the guide grooves 322 (3222A, 322B) are formed in a concave shape on the ground between the gaps 411 (411A, 411B) of the sliding plate 41, and steel plates are used on both sides of the inner side surface. The abutting contact plate 322C is stretched.
The guide pin 321 has a cylindrical or ring-shaped contact member 321C attached to the lower end of a main body 321A formed of a rod-shaped steel material via a bearing 321B such as a ball bearing or an oilless metal. The upper end of the main body 321 </ b> A is fixed to a part of the structural axis group of the transportation platform 30 by fastening or welding with a bolt 321 </ b> D or the like.

By using such guide pins 321 and guide grooves 322, the moving direction of the transportation platform 30 that is pulled or driven along the transportation path 20 is regulated along the guide grooves 322, and mechanical meandering is prevented.
In other words, when the transportation platform 30 meanders and deviates from the continuous direction of the guide groove 322, the contact member 321C of the guide pin 321 in the guide groove 322 contacts the contact plate 322C inside the guide groove 322, and more The shift is suppressed.
At this time, since the abutting member 321C of the guide pin 321 is rotatably mounted via the bearing 321B, excessive friction or the like may occur even if the abutting plate 322C is abutted while the transport base 30 is moving. It is possible to prevent wear or heat generation caused by

Guide grooves 322 (322A and 322B) for guiding the guide pins 321 are formed in each of the section transport paths 20A and 20B, and a meandering prevention function can be obtained over the entire length of the transport path 20.
Furthermore, as shown in FIG. 17, in the sliding plate 41 of the section conveyance path 20A, a notch 411C is formed in a portion corresponding to the extension of the guide groove 322B, and the guide groove 322B extends to the notch 411C. Has been. Thus, when the transportation platform 30 that has moved from the installation site 2 along the section transport path 20A moves to the section transport path 20B, the guide pin 321 smoothly enters the guide groove 322B through the notch 411C portion. can do.
Therefore, according to the configuration of FIG. 17 and FIG. 18, a mechanical meandering prevention structure can be obtained, and even when the section transport paths 20A and 20B are used, the transfer between each other can be performed smoothly.

In the configuration of FIG. 18, the upper end side of the guide pin 321 is fixed to the transport stand 30, but it may be supported rotatably by a bearing.
In FIG. 19, the main body 321A of the guide pin 321 is rotatably supported at its upper end side by two bearings 321E, and the main body 321A itself is rotatable. For this reason, the lower end side contact member 321C may be directly fixed to the main body 321A.
Further, it is desirable that the guide pin 321 is installed so that at least the contact member 321C can rotate so that frictional wear or heat generation does not occur due to contact with the contact plate 322C, but sufficient lubrication performance can be obtained. If a lubricating device can be added, it may be fixedly installed and cannot rotate.

In the configuration of FIG. 17 described above, one guide pin 321 is guided by the guide groove 322, but a plurality of guide pins and a plurality of guide grooves may be used.
In FIG. 20, three guide pins 32 are installed on the bottom surface of the carriage 30 at a position aligned linearly.
In the section conveyance path 20A, one guide groove 322A is formed in the gap 411A of the sliding plate 41, and all the guide pins 321 are guided by the guide groove 322A.
In the section conveying path 20B, three guide grooves 322B are formed in the gap 411A of the sliding plate 41, and each guide pin 321 is guided by the corresponding guide groove 322B.
In the section conveyance path 20A, three notches 411C are formed corresponding to the three guide grooves 322B.
In the configuration of FIG. 20 described above, the meandering suppression performance can be further improved by guiding the plurality of guide pins 321 arranged in the moving direction in the section conveyance path 20A by the single guide groove 322A.
On the other hand, in the section transport path 20B, the guide pins 321 are arranged in parallel in the movement direction, so that the guide performance as high as the section transport path 20A cannot be expected, but the section transport path 20B is shorter than the section transport path 20A. The meandering prevention effect in the transport path 20A can be enjoyed exclusively.

In FIG. 21, three guide pins 32 are installed on the bottom surface of the carrier frame 30 at each vertex position of a right triangle.
In the section conveyance path 20A, two guide grooves 322A are formed in the gap 411A of the sliding plate 41, one of the guide pins 321 is guided by one guide groove 322A, and the other two are the other. Guided by the guide groove 322A.
In the section conveyance path 20B, two guide grooves 322B are formed in the gap 411A of the sliding plate 41, one of the guide pins 321 is guided by one guide groove 322B, and the other two are the other. Guided by the guide groove 322B.
In the section conveyance path 20A, two notches 411C are formed corresponding to the two guide grooves 322B.
In such a configuration of FIG. 21, the meandering suppression performance can be further improved by guiding the two guide pins 321 aligned in the moving direction in the section conveyance path 20 </ b> A by the single guide groove 322 </ b> A.
Further, also in the section conveyance path 20B, the two guide pins 321 arranged in the moving direction are guided by the single guide groove 322B, so that the meandering suppression performance can be further improved.
Therefore, it is possible to enjoy an excellent meandering prevention effect in any of the section conveyance paths 20A and 20B.

In each embodiment as described above, the base rail 21 and the sliding plates 41 and 42 are used as the lower sliding means 40.
In the present invention, the lower sliding means 40 is actually limited to a configuration in which the surface slides. However, the related technology of the present invention may be a rolling configuration, and other configurations capable of reducing friction. If so, it can be used as the lower sliding means 40.
For example, as shown in FIG. 22, a sliding plate 41 is stretched on the upper surface of the base rail 21 of the transport path 20, and a plurality of steel round bars or cylinders are arranged thereon, and these are used as rollers 43. May be. The bottom surface side of the carrier 30 may be rolled directly on the roller 43, or a steel plate or the like may be stretched separately. When such a roller 43 is used, the friction can be further reduced than sliding. However, since the rollers 43 are sequentially discharged from the rear side of the transportation platform 30 as a result of rolling, it is necessary to circulate the rollers 43 to the front side of the transportation platform 30.

As the lower sliding means 40, a dedicated instrument capable of rolling while receiving a large load, for example, a chill tank 44 manufactured by Chill Corporation can be used.
As shown in FIG. 23 and FIG. 24, the chill tank 44 has a plurality of rollers 44B around the core portion 44A, and each roller 44B rolls around the core portion 44A with its rotation shaft connected by an endless member. It is possible to circulate. The core portion 44A is connected to a load member 44D through support members 44C on both sides.
23 and 24, a sliding plate 41 is stretched on the upper surface of the base rail 21 of the transport path 20, and a chill tank 44 is arranged on the slide plate 41. Supports the bottom. Therefore, the transport gantry 30 rolls with respect to the transport path 20 by the rollers 44B of the chill tank 44, and the chill tank 44 circulates the rollers 44B, so that no special work is required as it advances.

In such a chill tank 44, the height is considerably larger than the plate material. On the other hand, it is desirable to form a recess in the transport path 20 or the transport mount 30 to accommodate the chill tank 44.
In FIG. 25, a long die 23 having a U-shaped cross section is embedded in the transport path 20 in an open state upward, thereby forming a concave groove. The groove has a width that can be accommodated by the chill tank 44 and is formed slightly shallower than the height of the chill tank 44, and the bottom surface of the carrier 30 can be supported by the chill tank 44. According to such a configuration, the height dimension of the chill tank 44 can be absorbed on the transport path 20 side.
In FIG. 26, a recess 35 may be formed on the bottom surface of the carrier 30 and the chill tank 44 may be accommodated therein. The foundation rail 21 is installed in the conveyance path | route 20, and it can comprise so that the chill tank 44 may roll on the upper surface. According to such a structure, the recessed part which accommodates the chill tank 44 may be only the specific part of the conveyance mount 30, and the structure of the conveyance path | route 20 over a long distance can be simplified.

Furthermore, the same configuration as the above-described lower sliding means 40 can also be adopted for the upper sliding means 50 between the transfer platform 30 and the furnace bottom block 6 or the upper base 4B. In this case, the load supporting member 53 is provided on the upper surface of the upper sliding means 50, and the load on the furnace body is received by the load supporting member 53 during horizontal cutting for cutting out the furnace bottom block 6 in the separation step. desirable. However, due to the problem of installation space, it is difficult to apply a shape steel material having a thickness (height), and it is desirable to use a plate material as much as possible.
In addition, the driving of the transportation platform 30 and the movement of the furnace bottom block 6 are not limited to those in which the wires 28 and 38 are wound up by the traction means 29 and 39, but other driving mechanisms such as driving from the side by a hydraulic cylinder. Can be used as appropriate.
Further, the conveyance by the conveyance stand 30 may be used not only for the furnace bottom block 6 but also for conveyance of other ring blocks 7. Further, not only when the furnace body 3 is disassembled, but also when the ring block is transported from the work site to the installation site during construction of the blast furnace.

[Second Embodiment]
27 to 32 show a second embodiment of the present invention.
In the first embodiment described above, the furnace bottom block 6 according to the present invention is carried out in the dismantling process of the furnace body 3. In 2nd Embodiment described below, the furnace bottom block 6 based on this invention is carried in also to the construction process of the furnace body 3 with the disassembly process of the furnace body 3. FIG.
Note that the second embodiment described below uses the same conveying device as that of the first embodiment described above, and the same reference numerals are used for the same components, and redundant description is omitted.

As shown in FIG. 27, the furnace body 3 is constructed on the foundation 4 of the installation site 2 of the blast furnace 1. The furnace body 3 is configured by connecting another ring block 7 (furnace top mantel and furnace mantle) above the furnace bottom block 6. In the following description, the new furnace bottom block 6 is called the furnace bottom block 6N, the old furnace bottom block 6 is called the furnace bottom block 6P, the new ring block 7 is called the ring block 7N, and the old ring block 7 Is called a ring block 7P for distinction.
In the present embodiment, a work site (disassembly work site 8P) for disassembling the old furnace bottom block 6P taken out from the blast furnace 1 is used, and a work site (manufacturing for manufacturing a newly installed furnace bottom block 6N in advance). Work site 8N).

Between the manufacturing work site 8N and the dismantling work site 8P and the installation site 2, the ring block transfer device 10 according to the present invention is installed.
The transfer apparatus 10 is basically the same as that described in the first embodiment, and includes a transfer apparatus 20, a transfer mount 30 (30N, 30P), and an intermediate mount 60 as main components.
In the present embodiment, the transport path 20 is configured by a main transport path 20C extending from the installation site 2 and a sub transport path 20D branched from the main transport path 20C.
In the present embodiment, the dismantling work site 8P and the manufacturing work site 8N are arranged on one side of the main transport path 20C, and the sub transport path 20D to each branch to the same side (upper side in the figure) of the main transport path 20C. ing. As another embodiment, the work sites 8P and 8N may be arranged on the opposite side of the main conveyance path 20C, and the sub conveyance path 20D to each may branch to the opposite side of the main conveyance path 20C.
In this embodiment, about the other ring block 7, it conveys between other work sites using the existing transport bogie (dolly) for furnace bodies. The location of the other work site may be selected as appropriate in consideration of the use situation of the surrounding land, and the specification of the dolly as the transport means may be selected as appropriate, and the present invention is not limited to these.

Hereinafter, refurbishment work of the blast furnace furnace body including the dismantling or reconstruction of the furnace body in the second embodiment will be described.
The blast furnace furnace repair work is started when the blast furnace 1 is in operation.
In FIG. 27, a manufacturing work site 8N, a dismantling work site 8P, and a transfer device 10 are installed around the installation site 2 (disassembly process group preparation process and construction process group preparation process). Then, in the manufacturing work site 8N, the manufacture of a new furnace bottom block 6N is started on the transportation platform 30N (manufacturing process of the construction process group). In parallel, production of a new ring block 7N is started at a work site (not shown).
It is desirable that the production start time be calculated in reverse from the blow-off time of the operating blast furnace 1 in consideration of the production period of each block. More precisely, the cutting of the foundation 4 and the bottom of the bottom block 6 of the blast furnace 1 described above is performed before the blast furnace 1 is blown off. As will be described later, after the blast furnace 1 is blown off, the furnace body 3 (portion above the furnace bottom block 6) is disassembled, and then each block is carried into the installation site 2 for reconstruction. For this reason, what is necessary is just to make it the time of completing manufacture of each block match with the time of carrying in to the installation site 2 for reconstruction mentioned above.

As shown in FIG. 32, the new furnace bottom block 6 is constructed by stacking refractory bricks 6B on the inner side of the iron shell 6A on the transportation platform 30N arranged at the manufacturing work site 8N, and placing coke 6E, Construction is performed up to a state where the sleepers 6F and the raw materials 6G (coke or ore) are filled.
As the new furnace bottom block 6 manufactured at the manufacturing work site 8N, it is only necessary to have a configuration necessary to form the furnace body 3 by being brought into the installation site 2 and connected to each other. Whether to incorporate up to a certain degree of components can be selected as appropriate during implementation. Generally, it is a steel skin, an inner refractory material and a stave.

Returning to FIG. 27, when the manufacture of each block reaches the intended state, separation of the furnace body 3 is started (separation process of the dismantling process group).
Here, the expected state for starting the separation is a state in which the predicted time until the completion of the ring block manufacturing work at the work site is substantially the same as the predicted time required for disassembling the furnace body 3 described later or carrying out the ring block It can be.
Prior to the separation of the furnace body 3, the blast furnace 1 is started to stop blowing (stopped operation). Even if the blowing of the blast furnace 1 is started, a considerable period is required to cool the blast furnace 1 to such an extent that separation is possible. For this reason, it is desirable to prepare for blowing off a predetermined period before the separation start time of the furnace body 3.

When the furnace body 3 can be separated, the old furnace bottom block 6P is carried out.
In FIG. 28, the divided old ring block 7P is lifted, and the transportation platform 30P is brought closest to the installation site 2, and in this state, the furnace bottom block 6P is pulled out of the furnace and transferred onto the transportation platform 30P. (Transfer process of dismantling process group). Then, the transfer platform 30P is moved and transferred to the work site 8P (transfer step of the dismantling step group).
The separation process or the conveyance process is as described in FIGS. 4 to 7 and the corresponding description of the first embodiment.

When the furnace bottom block 6 is transported to the dismantling work site 8P, the other ring blocks 7 are replaced.
In FIG. 29, the ring blocks 7P that have been lifted are sequentially lowered and transported to a work site (not shown) by a dolly 61. At this time, the intermediate mount 60 is retracted so that the dolly 61 is as close as possible to the installation site 2. The direction in which the ring block 7P is taken out is preferably the same direction as the furnace bottom block 6P.
When the last ring block 7P (uppermost stage) can be carried out, new ring blocks 7N manufactured at other work sites (not shown) are successively carried in. The new ring block 7N is carried in by using the above-described dolly 61 and the reverse route of carrying out the old ring block 7P.

When a new ring block 7N can be carried into the installation site, a new furnace bottom block 6N is carried underneath.
In FIG. 30, the conveyance path 10 has already been prepared for the dismantling process (preparation process for the construction process group). Since a new furnace bottom block 6N is manufactured on the transportation platform 30N at the manufacturing work site 8N, the transportation platform 30N is transported to the installation site 2 by moving along the transportation path 10 (construction process). Group transport process).

In FIG. 31, a new furnace bottom block 6N is transferred from the transfer platform 30N onto the foundation 4 (transfer process of the construction process group), and the ring block 7N that has been previously loaded and lifted above the foundation 4 is transferred. And are sequentially connected onto the furnace bottom block 6N (linking process of the building process group).
As a result, a new furnace body 3 is constructed on the installation site 2 by a series of furnace bottom blocks 6 and ring blocks 7. And after constructing necessary piping etc., the trial run as a blast furnace 1 thru | or operation | movement is started.
The old furnace bottom block 6P that has already been transported to the dismantling work site 8P and the old ring block 7P that has been transported to another work site are dismantled and disposed of as waste materials.

According to this embodiment, each effect described in the first embodiment is obtained in the same manner by including the dismantling process group (preparation process, separation process, transfer process, transfer process) of the first embodiment. be able to.
In addition, by including a construction process group (manufacturing process, preparation process, transfer process, transfer process, connection process), manufacturing of new furnace bottom block 6N and ring block 7N is a manufacturing work different from installation site 2. Since it can be performed at the site 8N, and the blow-off can be delayed by the work period, the operation period of the blast furnace 1 can be extended to the maximum, and the stop period for refurbishment can be minimized.
Further, by implementing the construction process group according to the procedure based on the present invention, the construction period can be shortened with respect to the construction of the furnace body.

That is, it is desirable that the furnace bottom block used for constructing the furnace body is previously subjected to construction of refractory bricks in the furnace at the work site. In order to shorten the construction period at the installation site, it is desirable to increase the number of construction parts to be carried out at the work site as much as possible.
However, as described above, the conventional dolly for carrying the ring block has a limit on the maximum load weight. When using such a dolly when transporting the furnace bottom block manufactured at the work site to the installation site, there is a problem that the number of items that can be constructed in advance cannot be increased due to the weight limit of the dolly. Specifically, when transported by a dolly in the furnace bottom block, refractory bricks were installed up to the lower level of the tap.
On the other hand, if the conveyance based on this invention is utilized, since there is no weight restriction, it is possible to pre-construct all refractory bricks in the furnace bottom block (3-5 days shortening the construction period), In-furnace raw materials (sleepers, coke, iron ore) required for raising can be charged into the furnace bottom block in advance (after manufacture of the furnace bottom block and before transport) (reduction of construction period 1 ~ 2 days). By these, adoption of the construction process group based on this invention makes it possible to shorten the repair work period of 4-7 days.

FIG. 32 shows the state of the carry-in work on the foundation 4 of the furnace bottom block 6 in the construction process of the present embodiment.
The carry-in operation of the furnace bottom block 6 (same for other ring blocks 7) onto the foundation 4 in the construction process of the present embodiment is basically the same as the carry-out work from above the foundation 4 shown in FIGS. Device 10 is used. However, the carrying direction of FIG. 31 mentioned above and the carrying-out operation | work of FIG. 1 differ in the conveyance direction.

In FIG. 32, the traction means 29 </ b> C is installed on the installation site 2 adjacent to the foundation 4. The traction means 39C is desirably located above the upper surface of the foundation 4 because the furnace bottom block 6 is pulled on the foundation 4, and is fixed to a column on the opposite side of the furnace body 5 from the transportation platform 30. ing.
For the traction means 29C and 39C, the same configuration as the traction means 29 and 39 of the first embodiment described above can be used as appropriate. The wires 28 </ b> C and 38 </ b> C are appropriately installed by connecting the pulling means 29 </ b> C and 39 </ b> C and the transportation platform 30 or the furnace bottom block 6.
Thus, the transport apparatus 10 can cope with both the disassembly process and the construction process by appropriately switching the means for towing.

By the way, in this invention, in order to transfer the furnace bottom block 6 or the ring block 7 horizontally between the upper surface of the conveyance mount 30 and the upper surface of the foundation 4 of the installation site 2, It is necessary that the upper surface and the upper surface of the foundation 4 have the same height. As described in the first embodiment, a continuous upper sliding means 50 is installed on the upper surface of each of these in order to facilitate transport of the furnace bottom block 6 and the like.
In the second embodiment described above, when the furnace bottom block 6 is carried out from the installation site 2 (disassembly process) and when these are carried into the installation site 2 (construction process), the upper surface height of the foundation 4 is It is desirable that they are the same.

In the dismantling process, the height of the upper surface of the foundation 4 is determined by horizontally cutting the lower part of the furnace body 3 and dividing the furnace bottom block 6 and the foundation 4. Therefore, it is necessary to set the height of the foundation 4, that is, the height of horizontal cutting in accordance with the height of the upper surface of the carrier 30.
In the construction process, when the foundation 4 disassembled first is used as it is, the upper surface height of the foundation 4 already matches the upper surface height of the carrier 30. On the other hand, when the foundation 4 is recreated, it is desirable to construct the base 4 so that its upper surface height matches the upper surface height of the carrier 30.

  In the first embodiment described above, the present invention is applied to the dismantling of the furnace body 3, and in the second embodiment described above, the present invention is applied to both the disassembly and reconstruction of the furnace body 3. The present invention may be applied only to reconstruction by adopting another method for dismantling of No. 3. Other modifications and the like within the scope of achieving the object of the present invention are included in the present invention.

  The present invention relates to a ring block transfer device and a method for repairing a blast furnace furnace body, and can be used for carrying out and carrying in a ring block at the time of blast furnace renewal or dismantling. Can be used for import.

The side view which shows the blast furnace and conveyance apparatus of 1st Embodiment of this invention. The top view which shows the blast furnace and conveyance apparatus of the said 1st Embodiment. Sectional drawing which shows the lower sliding means and the upper sliding means of the said 1st Embodiment. The schematic diagram which shows the preparatory process in the said 1st Embodiment. The schematic diagram which shows the isolation | separation process in the said 1st Embodiment. The schematic diagram which shows the transfer process in the said 1st Embodiment. The schematic diagram which shows the conveyance process in the said 1st Embodiment. Sectional drawing which shows other embodiment of the lower sliding means of this invention. Sectional drawing which shows other embodiment of the lower sliding means of this invention. The top view which shows the meandering prevention system of this invention. The figure which shows the control block of the meandering prevention system of this invention. The figure which shows the control flow of the meandering prevention system of this invention. The figure which shows the other control flow of the meandering prevention system of this invention. Sectional drawing which shows other embodiment of the lower sliding means of this invention. Sectional drawing which shows other embodiment of the lower sliding means of this invention. The top view which shows other embodiment of the meander prevention mechanism of this invention. Sectional drawing which shows one form of the principal part of the meandering prevention mechanism of this invention. Sectional drawing which shows the other form of the principal part of the meandering prevention mechanism of this invention. Sectional drawing which shows other embodiment of the meandering prevention mechanism of this invention. The top view which shows other embodiment of the meander prevention mechanism of this invention. The top view which shows other embodiment of the meander prevention mechanism of this invention. Sectional drawing which shows other embodiment of the lower sliding means of this invention. Sectional drawing which shows other embodiment of the lower sliding means of this invention. Sectional drawing which shows other embodiment of the lower sliding means of this invention. Sectional drawing which shows the lower sliding means of other embodiment of this invention. Sectional drawing which shows the lower sliding means of other embodiment of this invention. The side view which shows the state at the time of the repair start of 2nd Embodiment of this invention. The side view which shows the state of the dismantling process of 2nd Embodiment of this invention. The side view which shows the transition stage to the construction process of 2nd Embodiment of this invention. The side view which shows the state of the construction | assembly process of 2nd Embodiment of this invention. The side view which shows the state of the repair last stage of 2nd Embodiment of this invention. The side view which shows the conveying apparatus of 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Blast furnace 2 ... Installation site 3 ... Furnace body 4 ... Foundation 4A ... Cutting part 4B ... Foundation upper part 4C ... Foundation lower part 4D ... Gap part 4E ... Lower cutting surface 4F ... Upper cutting surface 4G ... Cutting section 5 ... Furnace body 6A ... Skin 6B ... Fire brick 6C ... Residue 6D ... Shoe 6E ... Bracket 6, 6N, 6P ... Furnace bottom block 7, 7N, 7P ... Ring block 8 ... Work site 8N ... Manufacturing work site 8P ... Dismantling work Site 10 ... Conveying device 20 ... Conveying routes 20A, 20B ... Section conveying route 20C ... Main conveying route 20D ... Sub-conveying routes 21, 22 ... Base rail 23 ... Long dies 28, 38, 28A, 28B ... Wires 29, 39 , 29A, 29B... Pulling means 30, 30N, 30P... Transporting base 31... Mounting surface 32 .. bottom surface 35... Recessed portion 40. lower sliding means 41 and 42. Movement Means 51, 52 ... Sliding plate 53 ... Load support member 60 ... Intermediate mount 292 ... Trip distance control means

Claims (24)

A ring block transfer device for transferring a plurality of ring blocks constituting a furnace body of a blast furnace between a blast furnace installation site and a work site different from the installation site,
A transfer path installed between the installation site and the work site;
A transportation platform having a mounting surface that is slidable on the transportation path and formed on the upper surface so as to be aligned with the height of the foundation of the furnace body;
Lower sliding means formed between the transport path and the bottom surface of the transport platform;
Upper sliding means formed between the mounting surface and the bottom surface of the ring block;
A ring block conveying apparatus comprising: In the ring block conveying apparatus according to claim 1,
The transport path is configured by connecting one or a plurality of linear section transport paths, and includes a pulling means on an extension line for each section transport path. . In the ring block conveying apparatus according to claim 2,
The ring block conveying device, wherein the traction means includes a plurality of traction mechanisms installed in parallel in the width direction of the section conveyance path, and traction control means for synchronizing the traction operations of the traction mechanisms. . In the ring block conveying apparatus according to claim 3,
The traction control means includes a position detector that detects a movement amount in the traction direction in each towed portion corresponding to each traction mechanism of the transport platform, and the traction of the transport platform from each detected travel amount. An apparatus for transporting a ring block, comprising: a skew detection unit that determines an inclination with respect to a direction; and a skew correction unit that corrects an operation of each traction mechanism so that the inclination is reduced. In the ring block conveying apparatus according to claim 4 ,
The skew detection unit calculates an average value of the movement amounts, calculates a deviation between the average value and the movement amounts, and the skew correction unit calculates the deviations for the traction mechanisms. A ring block transport device which performs correction of a correction amount according to the above. In the ring block conveying apparatus according to any one of claims 1 to 5,
The transport apparatus for a ring block, wherein the transport path is extended into the work site, and the transport platform can be accommodated in the work site while the ring block is placed. In the ring block conveying apparatus according to any one of claims 1 to 6,
The lower sliding means includes a sliding member laid on the transport path and a sliding member mounted on the bottom surface of the transport gantry, and makes the pair of sliding members slidably contact each other. Composed of
The pair of sliding members is either a combination of plate materials, one is a plate material and the other is a combination of long mold materials, and both are combinations of long mold materials, and each sliding member is a steel material, stainless steel material or A ring block conveying device comprising a low friction plywood. In the conveying apparatus of the ring block in any one of Claim 1 to Claim 7 ,
The upper sliding means includes a sliding member laid on the mounting surface and a sliding member mounted on the bottom surface of the ring block, and causes the pair of sliding members to slidably contact each other. Composed of
The pair of sliding members is either a combination of plate materials, one is a plate material and the other is a combination of long mold materials, and both are combinations of long mold materials, and each sliding member is a steel material, stainless steel material or A ring block conveying device comprising a low friction plywood. In the ring block conveying apparatus according to claim 8 ,
The ring block transport device, wherein the upper sliding means extends from the mounting surface to the foundation. In the conveying apparatus of the ring block in any one of Claim 1 to Claim 7 ,
The upper sliding means is configured by mounting a floating conveying means that floats and moves on the mounting surface by ejection of fluid between the bottom surface of the ring block and the mounting surface. Ring block transfer device. In the conveying apparatus of the ring block in any one of Claim 1 to Claim 10 ,
A ring block transfer device comprising an intermediate frame installed between the foundation and the transfer path and having a flat upper surface and the same height as the mounting surface. A dismantling process in which a furnace body installed at an installation site is horizontally cut and divided into a plurality of ring blocks, the ring blocks are transported from the installation site to a work site, and the ring block is further disassembled at the work site. A method of repairing a blast furnace furnace body including a group,
As the dismantling process group,
It is formed between a transfer path from the installation site to the work site, a transfer stand that is slidable on the transfer route and has a mounting surface on an upper surface, and the transfer route and the bottom surface of the transfer stand. A preparation step of preparing a lower sliding means ;
A separation step of cutting the bottom part of the furnace body horizontally by cutting the foundation part of the furnace body in the horizontal direction at the height of the placement surface, and cutting horizontally between the upper part of the furnace body, and
A transfer step of moving the furnace bottom block in the horizontal direction and placing it on the placement surface;
A transfer step of sliding the transfer platform on which the furnace bottom block is placed on the transfer path by the lower sliding means and moving the transfer stand to the work site along the transfer path. Renovation method of the blast furnace furnace. In the blast furnace furnace repair method according to claim 12 ,
In the separation step, when cutting the basic portion of the furnace body in the horizontal direction, in the plane shape, set a plurality of cutting sections parallel to the transport direction of the transfer step, in each cutting section,
Cut the height position of the mounting surface and the position above the mounting surface to a predetermined height horizontally to form a lower cutting surface and an upper cutting surface, and remove the portion between the upper and lower cutting surfaces Forming a gap, placing a sliding member extending in the moving direction of the transfer step on the upper surface of the lower cut surface, and placing a load support member on the upper surface of the sliding member to fill the gap,
Repeat the formation of each cut surface or the filling of the voids in all sections,
The above-described method is carried out before the blast furnace is blown off. In the repair method of a blast furnace furnace body according to claim 12 or claim 13 ,
As a construction process group for constructing a furnace body at the installation site,
It is formed between a transport path from the work site to the installation site, a transport base that can slide on the transport path and has a mounting surface on the top surface, and the transport path and the bottom surface of the transport base. A preparation step for preparing the lower sliding means ;
A manufacturing process for arranging the transfer platform at the work site, and manufacturing a furnace bottom block on the mounting surface,
A transport step in which the transport platform on which the furnace bottom block is placed is slid on the transport path by the lower sliding means and moved to the installation site along the transport path;
A transfer step of moving the furnace bottom block horizontally from the placement surface to the foundation of the installation site;
A connecting step of sequentially connecting the ring blocks to form a furnace body;
A method for refurbishing a blast furnace furnace body characterized by comprising: Renovation of a blast furnace furnace body including a construction process group in which a plurality of ring blocks are manufactured at a work site, the ring blocks are transported from the work site to an installation site, and the ring blocks are connected at the installation site to construct a blast furnace. A method,
As the construction process group,
It is formed between a transport path from the work site to the installation site, a transport base that can slide on the transport path and has a mounting surface on the top surface, and the transport path and the bottom surface of the transport base. A preparation step for preparing the lower sliding means ;
A manufacturing process for arranging the transfer platform at the work site, and manufacturing a furnace bottom block on the mounting surface,
A transport step in which the transport platform on which the furnace bottom block is placed is slid on the transport path by the lower sliding means and moved to the installation site along the transport path;
A transfer step of moving the furnace bottom block horizontally from the placement surface to the foundation of the installation site;
A connecting step of sequentially connecting the ring blocks to form a furnace body;
A method for refurbishing a blast furnace furnace body characterized by comprising: In the blast furnace furnace repair method according to any one of claims 12 to 15 ,
In the preparation step, the transport path is arranged in a straight line, and traction means is installed on an extension line farther from the foundation of the transport path,
In the transporting process, the blast furnace furnace repair method is characterized in that the transporting platform is pulled by the pulling means and moved along the transporting path. The method for refurbishing a blast furnace furnace body according to claim 16 ,
In the preparation step, a plurality of linear section transport paths are connected to form the transport path, and the traction means is installed on the extension line for each section transport path,
In the transfer step, the furnace bottom block refurbishing method, wherein the furnace bottom block to be transferred is sequentially connected to a traction means on the downstream side. In the method for refurbishing a blast furnace furnace body according to claim 16 or claim 17 ,
As the traction means, using a plurality of traction mechanisms installed in parallel in the width direction of the section conveyance path, and a traction control means for synchronizing the traction operation of each traction mechanism,
A blast furnace characterized in that the traction operation of each of the traction mechanisms is synchronized by the traction control means, and the amount of movement of each towed portion of the transfer platform to be pulled by each of the traction mechanisms is controlled to be constant. How to repair the furnace body. The method for refurbishing a blast furnace furnace body according to claim 18 ,
The traction control means detects the amount of movement in the traction direction at each towed portion corresponding to each traction mechanism of the conveyance platform, and the inclination of the conveyance platform with respect to the traction direction is determined from each detected amount of movement. A method for repairing a blast furnace body, comprising: determining and correcting the operation of each traction mechanism so that the inclination of the operation of each traction mechanism is reduced. In the blast furnace furnace repair method according to claim 19 ,
In determining the inclination, an average value of the movement amounts is calculated, a deviation between the average value and the movement amounts is calculated, and the traction mechanism is corrected with a correction amount corresponding to the deviation. A method for refurbishing a blast furnace furnace body. In the method for refurbishing a blast furnace furnace body according to any one of claims 12 to 20 ,
A method for repairing a blast furnace furnace body, wherein the transfer route is extended to the work site, and the ring block is operated on the transfer stand on the transfer route in the work site. . In the repair method of the blast furnace furnace body in any one of Claim 12 to Claim 21 ,
A lower sliding means is formed between the transport path and the bottom surface of the transport gantry,
The lower sliding means includes a sliding member laid on the transfer path and a sliding member mounted on the bottom surface of the transfer stand, and makes the pair of sliding members slidably contact each other. Composed of
The pair of sliding members is either a combination of plate materials, one is a plate material and the other is a combination of long mold materials, and both are combinations of long mold materials, and each sliding member is a steel material, stainless steel material or A method of repairing a blast furnace body characterized by comprising low-ply plywood. In the method for refurbishing a blast furnace furnace body according to any one of claims 12 to 22 ,
An upper sliding means is formed between the placement surface and the bottom surface of the furnace bottom block,
The upper sliding means includes a sliding member laid on the mounting surface and a sliding member mounted on the bottom surface of the furnace bottom block, and the pair of sliding members are slidably brought into contact with each other. Made up of
The pair of sliding members is either a combination of plate materials, one is a plate material and the other is a combination of long mold materials, and both are combinations of long mold materials, and each sliding member is a steel material, stainless steel material or A method of repairing a blast furnace body characterized by comprising low-ply plywood. In the method for refurbishing a blast furnace furnace body according to any one of claims 12 to 22 ,
An upper sliding means is formed between the placement surface and the bottom surface of the furnace bottom block,
The upper sliding means is configured by mounting a floating conveying means that floats and moves on the mounting surface by ejection of fluid between the bottom surface of the ring block and the mounting surface. Refurbishment method of blast furnace furnace body.

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