CN112111620B - Ball top refractory dismounting device and method for blast furnace hot blast stove - Google Patents
Ball top refractory dismounting device and method for blast furnace hot blast stove Download PDFInfo
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- CN112111620B CN112111620B CN202011012071.5A CN202011012071A CN112111620B CN 112111620 B CN112111620 B CN 112111620B CN 202011012071 A CN202011012071 A CN 202011012071A CN 112111620 B CN112111620 B CN 112111620B
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- support
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- stair
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/02—Brick hot-blast stoves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1694—Breaking away the lining or removing parts thereof
Abstract
The application provides a ball top refractory dismounting device and a dismounting method for a blast furnace hot blast stove, and belongs to the technical field of blast furnace hot blast stove construction. The demolition equipment includes a working support and a working stair. The operation support comprises a support beam and a support platform; the bottom of the supporting beam is used for being fixed on a construction site; the support platform is connected with the top of the supporting beam and can extend to the dome-shaped hole facing the sky of the dome, and the support platform is provided with an operation hanging part. The operation stair is detachably connected with the bottom of the operation bracket; the working stairway is configured to: after the refractory materials around the vault facing the sky hole are removed to form an operation opening, the operation stair can extend into the ball top from the operation opening, and the bottom end of the operation stair can extend to the refractory materials above the preset area close to the ball top; wherein, the preset area is an area where an operator can stand on the refractory material for dismantling. The dismantling method is carried out by adopting the dismantling equipment. A crane is not needed, the operation is convenient in the field, and the dismantling period is shortened.
Description
Technical Field
The application relates to the technical field of blast furnace hot blast stove construction, in particular to a ball top refractory dismounting device and a dismounting method of a blast furnace hot blast stove.
Background
The spherical roof of the hot blast stove is positioned at the highest part of the hot blast stove of the blast furnace, and after upper facilities such as a stove shell and the like are dismantled, no fixed safety hanging points which can provide protective measures such as hanging safety belts, falling protectors and the like for spherical roof refractory dismantling operators exist. For this reason, large cranes are used in the prior art, typically having a height of more than 40 meters, to provide fixed safety suspension points for the operating personnel.
At present, a crane is adopted to be suspended, even if continuous operation is carried out in the removal operation of the vault refractory, 4-5 days are generally needed, and the use cost of only the crane is very high. Moreover, for safety control, the crane operation mode can only be arranged in the daytime, so that the construction period is longer, and the cost of the dismantling operation is higher. In addition, because the field arrangement of the blast furnace hot blast stove is usually compact, the large crane is used for high-altitude dismantling operation, and the operation is easily limited by the field.
Disclosure of Invention
The utility model aims to provide a ball-top refractory demolishs equipment and demolishs method of blast furnace hot-blast stove, need not to use the loop wheel machine, and the operation is convenient at the on-the-spot place, and demolishs the time limit for a project and shorten.
The embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides a ball-top refractory removing device for a blast furnace hot blast stove, which includes an operation bracket and an operation stair. The operation support comprises a support beam and a support platform; the bottom of the supporting beam is used for being fixed on a construction site; the support platform is connected with the top of the supporting beam and can extend to the dome-shaped hole facing the sky of the dome, and the support platform is provided with an operation hanging part. The operation stair is detachably connected with the bottom of the operation bracket; the working stairway is configured to: after the refractory materials around the vault facing the sky hole are removed to form an operation opening, the operation stair can extend into the ball top from the operation opening, and the bottom end of the operation stair can extend to the refractory materials above the preset area close to the ball top; wherein, the preset area is an area where an operator can stand on the refractory material for dismantling.
Among the above-mentioned technical scheme, the operation support is the frame construction of interconnect's a supporting beam and supporting platform, and its area is little, and it is convenient at the operation of on-the-spot place. The support platform is installed through the support beam, the operation hanging part of the support platform can provide hanging points for hanging safety belts, safety guards and other protective measures for operators, a crane is not needed for assistance, and on one hand, the cost of using the crane can be saved; on the other hand, the operation mode of the crane is not influenced by the operation only in the daytime.
When dismantling the operation, the support platform can extend to the vault of dome towards the mode of sky hole, makes things convenient for the operation personnel to dismantle the vault towards the resistant material around the sky hole on the support platform in order to form the operation opening of follow-up operation. Meanwhile, the operation stair can extend into the ball top from the operation opening, and an operator can finish dismantling the refractory materials above the preset area of the ball top in the operation stair, the operation stair is connected to the support platform, the operator finishes dismantling the refractory materials above the preset area on the operation stair, then stands on the refractory materials to dismantle the refractory materials in the preset area, and the dismantling of the refractory materials of the ball top can be finished.
In some possible embodiments, the work support includes a first support and a second support that can be symmetrically disposed along the dome; each support is provided with a supporting beam and a support platform, and one end of the support platform, which is far away from the supporting beam, can extend to the edge of the vault facing the sky hole.
Among the above-mentioned technical scheme, set up the operation support into first support and second support, conveniently lift by crane and install. The first support and the second support can be symmetrically arranged along the dome, one end, far away from the supporting beam, of the support platform of each support can extend to the edge of the dome-shaped hole facing the sky, so that the area above the dome can be well covered, and on one hand, the refractory materials around the dome-shaped hole facing the sky can be conveniently removed on the support platform to form a working opening for subsequent operation; on the other hand, conveniently connect the operation stair in the bottom of operation support.
In some possible embodiments, the support beam is perpendicular to the support platform, the support beam is capable of extending in the height direction of the dome, and the support platform is capable of extending in the radial direction of the cross-section of the dome.
Among the above-mentioned technical scheme, the mode of the radial extension of the cross section of support platform along the dome can provide steady operation platform, and the operation personnel can conveniently demolish the arch dome towards the resistant material around the sky hole when moving on the support platform simultaneously in order to form the operation opening that has great diameter, make things convenient for going on of follow-up operation. The supporting beam can be stably fixed on a construction site in a mode of extending along the height direction of the ball top; the support beam is perpendicular to the support platform, and the support platform on the top of the support beam can be well supported.
In some possible embodiments, a reinforcing beam is connected between the support beam and the support platform.
Among the above-mentioned technical scheme, the stiffening beam can strengthen the joint strength of a supporting beam and support platform.
In some possible embodiments, in the radial direction of the cross section of the dome, the working stairs are arranged obliquely, the bottom ends of the working stairs extend towards the side close to the support beam; in the height direction of the top of the ball, the bottom of the operation stair can extend to the middle of the top of the ball.
Among the above-mentioned technical scheme, operation stair slope sets up and extends towards the one side that is close to a supporting beam for operation stair can set up towards the direction slope of the inner wall that is close to the ball top, makes operation stair extend to the middle part of ball top in the height simultaneously, makes the operation scope of operation personnel on operation stair can cover the resistant material of ball top middle part and above region betterly. The operation personnel can dismantle the position to the middle part of ball-top with resistant material when the operation on the operation stair, accomplishes the operation back of demolising at the operation stair, and the resistant material in remaining default zone can provide stable operation platform, makes things convenient for the operation personnel to further stand and continue demolising on resistant material.
In some possible embodiments, the working staircase has a first working condition, fixed with respect to the support platform, and a second working condition, sliding with respect to the support platform in the extension direction of the support platform.
Among the above-mentioned technical scheme, the gliding mode of operation stair can be relative to the support platform, is convenient for adjust the relative position of operation stair and ball top for the operation stair can correspond with the resistant material of the regional top of predetermineeing of ball top better, and it is more convenient that the operation personnel demolish on the operation stair.
In a second aspect, an embodiment of the present application provides a method for removing a refractory material on a spherical roof of a blast furnace hot blast stove, where the method is performed by using the removing apparatus provided in the first aspect, and the method includes: the cutting furnace shell is positioned at the outer side of the top of the spherical top. Installing an operation bracket on the outer side of the top dome; the bottom of the support beam is fixed on a construction site, and the support platform extends to the arch crown hole facing the sky. The safety rope of the operator is hung at the operation hanging part. And (4) dismantling the refractory material around the arch-facing hole to form a working opening so as to enlarge the arch-facing hole. And the bottom of the operation support is provided with an operation stair, and the operation stair extends into the top of the ball from the operation opening. The operating personnel finish the refractory material of presetting regional top at the operation stair and demolish, then the operating personnel stands on the refractory material of presetting the region and continues the operation of demolishing.
Among the above-mentioned technical scheme, after cutting the stove outer covering, install the operation support in the dome outside, the operation personnel hang the position at the operation of support platform, need not to use the loop wheel machine to assist. When the dismantling operation is carried out, an operator disassembles the refractory materials around the skylight with the arch facing the arch on the support platform to form an operation opening for subsequent operation; then, installing an operation stair, and removing the refractory materials above the preset area of the top of the ball on the operation stair by an operator; then, the operator stands on the refractory material to remove the refractory material in the preset area, and the removal of the dome refractory material can be completed. The dismantling operation mode is simple, and the dismantling construction period can be effectively shortened.
In some possible embodiments, the cutting of the portion of the furnace shell located outside the top of the dome is performed while at least partially retaining the portion of the furnace shell located near the bottom of the dome. In the operation of installing the operation bracket on the outer side of the dome, the bottom of the support beam is welded to the portion of the furnace shell remaining.
Among the above-mentioned technical scheme, because the material of stove outer covering is steel, remains partial stove outer covering when cutting the stove outer covering for weld with a supporting beam, a supporting beam can conveniently and install steadily.
In some possible embodiments, the working stairway is configured to: in the radial direction of the cross section of the ball top, the operation stairs are obliquely arranged from the support platform to the direction close to the inner wall of the ball top; in the height direction of the top of the ball, the bottom of the operation stair can extend to the middle of the top of the ball. The worker moves down the working stairs to remove the refractory down the top of the dome.
Among the above-mentioned technical scheme, with the direction slope setting of operation stair orientation near the inner wall of dome, make operation stair extend to the middle part of dome in the height simultaneously for the operation scope of operation personnel on operation stair can cover the resistant material in dome middle part and above region betterly. The operation personnel can dismantle the position to the middle part of ball-top with resistant material when the operation on operation stair for the operation that the operation personnel follow-up stand and demolish on resistant material is stable and convenient.
In some possible embodiments, the working stairway is configured to: the support platform has a first working state which is fixed relative to the support platform and a second working state which slides relative to the support platform in the extending direction of the support platform. When the refractory material is removed downwards from the top of the ball top, the operation stair is adjusted to be close to the inner wall of the refractory material, so that an operator can finish removing the refractory material above the preset area on the operation stair.
Among the above-mentioned technical scheme, dispose into operation stair and can slide relative support platform, through adjusting the relative position of operation stair and ball top during the operation for operation stair can correspond with the resistant material of the regional top of presetting of ball top better, and it is more convenient that the operation is demolishd to the operating personnel on operation stair.
The utility model provides a ball top refractory of blast furnace hot-blast stove demolishs equipment and demolishs method, beneficial effect includes:
the operation support is used for providing a support platform, providing an operation hanging part and realizing the installation of the operation stair. When the dismantling operation is carried out, an operator can firstly dismantle the refractory materials around the dome-shaped upward-facing sky hole on the support platform to form an operation opening for subsequent operation, then dismantle the refractory materials above the preset area on an operation stair extending into the dome through the operation opening, and then directly stand on the refractory materials in the preset area to continue dismantling the refractory materials.
The floor area of the operation support is small, the operation is convenient in the field, the crane is not needed for assistance, the cost of using the crane can be saved, and meanwhile, the influence that the crane operation can only be carried out in the daytime is avoided. Only the installation of the operation support and the installation of the operation stairs need to be carried out during the dismantling operation, the operation is convenient, the dismantling operation mode is simple, and the dismantling period can be effectively shortened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural view of a blast furnace hot blast stove according to the prior art before removal of a refractory material at the ball top;
fig. 2 is a schematic structural diagram of a ball-top refractory removing device of a blast furnace hot blast stove according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a method for removing a refractory ball-top of a blast furnace hot blast stove according to an embodiment of the present application at a first stage;
FIG. 4 is a schematic diagram of a second stage of a method for removing a refractory dome of a blast furnace hot blast stove according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a method for removing a refractory ball-top of a blast furnace stove according to an embodiment of the present disclosure at a third stage;
FIG. 6 is a schematic diagram of a fourth stage of a method for dismantling a refractory dome of a blast furnace hot blast stove according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of a fifth stage of a method for dismantling a refractory dome of a blast furnace hot blast stove according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of a sixth stage of a method for removing a refractory dome of a blast furnace hot blast stove according to an embodiment of the present application.
Icon: 100-a ball top refractory dismantling device of a blast furnace hot blast stove; 110-a work support; 1101-a first support; 1102-a second support; 111-support beam; 112-a scaffold platform; 113-operation hanging part; 1131 — a first hanging point; 1132 — a second hanging point; 114-a stiffening beam; 120-operating stairs; 200-ball top; 210-dome towards sky hole; 220-a working opening; 300-furnace shell; 400-field platform.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is to be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the application are used, and are only used for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. Furthermore, the terms "perpendicular", "parallel", and the like do not require that the components be absolutely perpendicular or parallel, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, in the prior art, a dome 200 of a blast furnace hot blast stove is located at the highest position of the blast furnace hot blast stove, the dome 200 is made of refractory, and the top of the dome 200 is provided with a dome-facing hole 210. The dome 200 is covered with a furnace shell 300 made of steel. In the removal operation of the refractory of the dome 200, the shell 300 is generally cut and removed to expose the refractory of the dome 200, and then the refractory is removed.
In addition, a site where the blast furnace hot blast stove is located is generally constructed with a site platform 400, which is disposed to be flat around a lower portion of the dome 200 near the middle thereof. It should be noted that, in the embodiment of the present application, the middle portion of the dome 200 refers to a position where the diameter of the cross section of the dome 200 is the largest, and the cross section of the dome 200 refers to a section of the dome 200 in the horizontal direction; the upper portion of the dome 200 refers to a position located above the middle portion of the dome 200, and the lower portion of the dome 200 refers to a position located below the middle portion of the dome 200.
Referring to fig. 2, the present embodiment provides a dome refractory removal apparatus 100 for a blast furnace hot blast stove, including a work support 110 and a work stair 120.
The work support 110 includes a support beam 111 and a support platform 112. The support platform 112 is provided with an operation hanging part 113, so that a hanging point for hanging safety belts, safety guards and other protective measures can be provided for operators, a crane is not needed for assistance, and on one hand, the cost of using the crane can be saved; on the other hand, the operation mode of the crane is not influenced by the operation only in the daytime.
The bottom of the supporting beam 111 is used for being fixed in the construction site, and the support platform 112 is connected with the top of the supporting beam 111 and can extend to the dome sky-facing hole 210 of the dome 200, so that an operator can conveniently remove the refractory around the dome sky-facing hole 210 on the support platform 112.
The working staircase 120 is adapted to be removably coupled to the bottom of the working carriage 110, illustratively with fasteners. The task stairway 120 is configured to: after the worker removes the refractory around the vault toward the ceiling 210 at the support platform 112 to form the working opening 220, the working stairway 120 can be extended into the dome 200 from the working opening 220, and the bottom end of the working stairway 120 can be extended to approach the refractory above the preset area of the dome 200, so that the worker can finish removing the refractory above the preset area of the dome 200 at the working stairway 120. Wherein, the preset area is an area where an operator can stand on the refractory material for dismantling.
When the dismantling operation is performed, the operator can conveniently dismantle the refractory around the arch top facing the sky hole 210 on the support platform 112 to form a working opening 220, as shown in fig. 5. The working stairs 120 are then mounted to the bottom of the support platform 112 as shown in fig. 6. The worker completes the dismantling of the refractory over the preset area of the dome 200 on the working staircase 120, and then stands on the refractory for the dismantled preset area to continue the dismantling of the refractory, as shown in fig. 7 and 8.
With respect to the work carrier 110:
it is to be understood that, in the embodiment of the present application, the manner in which the support beam 111 is fixed to the construction site is not limited. The support beams 111 may be secured by attachment to the site platform 400, such as by fasteners; the support beams 111 may also be attached to the side walls of the dome 200, for example, the operation bracket 110 is made of steel, which can ensure better strength, a part of the furnace shell 300 is reserved when the furnace shell 300 is cut, and the support beams 111 are welded to the reserved part of the furnace shell 300 to achieve fixation.
Illustratively, the supporting beam 111 can extend along the height direction of the dome 200, and after being fixed on a construction site, the supporting beam extends along the vertical direction, so that the supporting beam can be stably fixed on the construction site, and can better support the supporting platform 112 at the top of the supporting beam.
Alternatively, the support beams 111 include a first vertical beam, a second vertical beam, and a plurality of cross beams. The first vertical beam and the second vertical beam are arranged side by side and both extend in the height direction of the dome 200. The plurality of cross beams are arranged side by side along the height direction of the dome 200, and two ends of each cross beam are perpendicular to and connected with the first vertical beam and the second vertical beam respectively. This mode of setting up makes supporting beam 111 be the structure of ladder of crawling, makes things convenient for the operation personnel to crawl to support platform 112.
Illustratively, the supporting beams 111 are perpendicular to the supporting platform 112, the supporting platform 112 can extend along the radial direction of the cross section of the dome 200, the supporting platform 112 can better cover the position above the dome 200, and the operator can conveniently remove the refractory around the dome-shaped hole 210 when moving on the supporting platform 112. After the work support 110 is fixed to the construction site, the support platform 112 extends in the horizontal direction, and can also provide a stable operation platform for the worker.
Optionally, the width of the support platform 112 is 600-800 mm, so that a large operation area is provided for operators. The length direction of the support platform 112 is a direction in which the support platform 112 extends from the end close to the support beam 111 toward the direction away from the support beam 111, the height direction of the support platform 112 is a direction parallel to the height direction of the support beam 111, and the width direction of the support platform 112 is a direction perpendicular to both the length direction and the height direction of the support platform 112.
Further, a reinforcing beam 114 is connected between the supporting beam 111 and the bracket platform 112. One end of the reinforcing beam 114 is connected to the bottom of the end of the support platform 112 near the support beam 111, and the other end of the reinforcing beam 114 is connected to the side of the top of the support beam 111 near the support platform 112. The reinforcing beam 114 can enhance the connection strength between the support beam 111 and the support platform 112, and improve the reliability of the work support 110.
In some possible embodiments, the work support 110 includes a first support 1101 and a second support 1102 that can be symmetrically disposed along the dome 200; each of the brackets is provided with a support beam 111 and a bracket platform 112, and an end of the bracket platform 112 remote from the support beam 111 can extend to the edge of the dome facing the sky hole 210.
Since the dome 200 of the blast furnace hot blast stove is located at the highest position of the blast furnace hot blast stove, before installing the work support 110, the work support 110 needs to be lifted to the site platform 400, and then the work support 110 needs to be installed. The working support 110 is arranged into a first support 1101 and a second support 1102, so that the lifting and the installation are convenient. The first bracket 1101 and the second bracket 1102 can be symmetrically arranged along the dome 200, and one end of the bracket platform 112 of each bracket, which is far away from the support beam 111, can extend to the edge of the dome facing the sky hole 210, so that the area above the dome 200 can be well covered. This arrangement facilitates removal of refractory around the dome-facing skyhole 210 on the support platform 112 to form a working opening 220 for subsequent work and facilitates attachment of the working stairs 120 to the bottom of the working support 110.
It should be noted that, in the embodiment of the present application, the work support 110 is not limited to the split structure provided as the first support 1101 and the second support 1102, and may be provided as an integrated structure, for example, the work support 110 includes two support beams 111 and one support platform 112. Further, a support platform 112 is connected between the two support beams 111. The length of the stand platform 112 in the length direction is controlled to be not less than the maximum diameter of the cross section of the dome 200 so that the two support beams 111 can be symmetrically disposed on both sides of the dome 200.
In some possible embodiments, the work hang point 113 has a first hang point 1131 located above the upper surface of the support platform 112 and a second hang point 1132 located on the upper surface of the support platform 112. When the dismantling device is used for operation, an operator firstly operates the support platform 112 and then walks to the operation stair 120 or the refractory material in a preset area for operation. First hanging point 1131 is used for the operating personnel to hang when support platform 112 operates, and second hanging point 1132 is used for the operating personnel to walk to the position that is less than support platform 112 and hangs when operating, can satisfy the hanging needs of operating personnel in the difference as position department better.
Illustratively, the support platform 112 is provided with fences on both sides in the width direction, and each fence includes a plurality of vertical fences and a plurality of horizontal fences. Each vertical column extends along the height direction of the support platform 112, and a plurality of vertical columns are distributed side by side along the length direction of the support platform 112; each of the rails extends along the length of the rack platform 112, and a plurality of the rails are distributed side-by-side along the length of the rack platform 112. The plurality of transverse bars and the plurality of vertical bars are arranged in a staggered mode and connected with each other to form the net-shaped fence. The enclosure provides protection for the operator working on the support platform 112.
In the above arrangement, the connection between the horizontal rail and the vertical rail can be used as the first hanging point 1131, and the connection between the vertical rail and the support platform 112 can be used as the second hanging point 1132. Of course, the manner of installation of the work hanging portion 113 is not limited, and in other embodiments, a hanging ring may be installed for hanging.
With respect to the working stairway 120:
it is understood that, in the embodiment of the present application, the predetermined area where the worker can stand on the durable material for removal refers to an area where the durable material has better stability when the worker stands on the durable material, and the lower portion of the durable material of the predetermined area is better supported, such as the middle portion and the lower portion of the dome 200, or the upper portion of the dome 200 at a position close to the middle portion and the lower portion.
Illustratively, the predetermined area is the middle and lower portion of the dome 200. Further, the working stair 120 is obliquely arranged, the bottom end of the working stair 120 extends towards one side close to the support beam 111, that is, in the radial direction of the cross section of the ball top 200, the working stair 120 is obliquely arranged from the support platform 112 towards the direction close to the inner wall of the ball top 200; in the height direction of the ball top 200, the bottom of the working staircase 120 can extend to the middle of the ball top 200. The operation stair 120 is obliquely arranged towards the direction close to the inner wall of the ball top 200, and meanwhile, the operation stair 120 extends to the middle of the ball top 200 in height, so that the operation range of an operator on the operation stair 120 can well cover the refractory material in the middle of the ball top 200 and above.
Further, the working staircase 120 has a first working state fixed relative to the support platform 112 and a second working state sliding relative to the support platform 112 in the extending direction of the support platform 112. The relative position of the operation stair 120 and the ball top 200 can be conveniently adjusted by the sliding mode of the operation stair 120 relative to the support platform 112, so that the operation stair 120 can better correspond to the refractory above the preset area of the ball top 200, and the dismantling operation of operators on the operation stair 120 is more convenient.
Optionally, the working staircase 120 has a T-shaped slider, and the bottom of the support platform 112 has a T-shaped slide rail slidably engaged with the T-shaped slide rail, which extends along the length of the support platform 112 to place the working staircase 120 in the second working position. The working staircase 120 is provided with fasteners, and the support platform 112 is provided with a plurality of sets of fastening holes along the length direction for cooperating with the fasteners, so that the working staircase 120 is in a first working state.
The embodiment of the application also provides a method for dismantling the ball-top refractory of the blast furnace hot blast stove by adopting the dismantling equipment. The dismantling method comprises the following steps:
as shown in fig. 3, the first stage: the cutting furnace shell 300 is located at a portion outside the top of the dome 200.
As shown in fig. 4, the second stage: the operation bracket 110 is arranged on the outer side of the dome 200; the bottom of the support beam 111 is fixed to the construction site such that the support platform 112 extends to the arch top toward the sky hole 210.
As shown in fig. 5, the third stage: the operator is hung at the first hanging point 1131 of the work hanging part 113. The refractory around the dome-facing sky hole 210 is removed to form a working opening 220.
As shown in fig. 6, the fourth stage: the working staircase 120 is installed at the bottom of the working bracket 110, and the working staircase 120 is extended from the working opening 220 into the dome 200.
As shown in fig. 7, the fifth stage: the worker completes the dismantling of the refractory above the preset area at the working stairway 120.
As shown in fig. 8, the fifth stage: the ball top 200 has the remaining refractory material in the preset area, the stair 120 is removed, and the operator stands on the refractory material in the preset area to continue the removal operation.
According to the dismantling method provided by the embodiment of the application, after the furnace shell 300 is cut, the operation support 110 is installed on the outer side of the dome 200, and the safety rope of an operator is hung at the operation hanging part 113 of the support platform 112 without using a crane for assistance. When the dismantling operation is performed, an operator removes the refractory around the arch crown facing sky hole 210 on the support platform 112 to enlarge the arch crown facing sky hole 210 and form a working opening 220 for subsequent operation; then, the working stairway 120 is installed, and the worker removes the refractory over the preset area of the ball top 200 on the working stairway 120. In the prior art, when the refractory is removed to the lower part of the dome 200 by using a crane, the row of grids are usually built on the checker bricks of the regenerator to serve as a temporary removal operation platform, and then the refractory is removed, so that time and labor are wasted, and the construction period is long. In this application, when dismantling the operation and carry out the surplus and predetermine the region, the operation personnel stand and demolish the resistant material of predetermineeing the region on resistant material, can accomplish dismantling of 200 resistant materials of ball-top, need not to take the raft bars as dismantling the operation platform temporarily again. The dismantling operation mode is simple, and the dismantling construction period can be effectively shortened.
In the embodiment of the present application, the cutting of the portion of the furnace shell 300 located outside the top of the dome 200 at least partially retains the portion of the furnace shell 300 near the bottom of the dome 200. So that the bottom of the support beam 111 is welded to the portion of the shell 300 remaining in the operation of attaching the work bracket 110 to the outside of the dome 200. Adopt the welded mode, can effectively utilize the casing to accomplish the connection, and the welded mode is connected stably for supporting beam 111 can conveniently and install steadily.
Illustratively, when the furnace shell 300 is cut, the furnace shell 300 is left to surround the portion below the middle of the dome 200. The remaining edge of the furnace shell 300 is cut in the vertical direction to form a vertical joint plane tangential to the middle of the dome 200. The vertical connecting surface is used for welding with the support beam 111, so that the support beam 111 can be better attached to the furnace shell 300, the support beam 111 and the furnace shell 300 have larger welding area, and the support beam 111 is welded more stably.
When the working stairway 120 is disposed in an inclined manner, the worker moves down the working stairway 120 to remove the refractory downward from the top of the dome 200, and the worker can easily remove the refractory to the middle of the dome 200 when working on the working stairway 120.
When the working stairway 120 is configured to have the second working state of sliding relative to the support platform 112, the working stairway 120 is adjusted to be close to the inner wall of the refractory when the refractory is removed from the top of the dome 200 downwards, so that it is more convenient for the worker to complete the refractory removing work above the preset area on the working stairway 120.
Application example
By adopting the equipment 100 for dismantling the ball-top refractory of the blast furnace hot blast stove provided by the embodiment of the application, the method for dismantling the ball-top refractory of the blast furnace hot blast stove provided by the embodiment of the application is applied to Baowu group Shaokouguan steel 3200m3A blast furnace hot blast stove.
The work support 110 includes a first support 1101 and a second support 1102, each of which is welded to the furnace shell 300 by a support beam 111, respectively. The top end of the support beam 111 is flush with the position of the arch toward the sky hole 210; the work support 110 is perpendicular to the support beam 111, and the work support 110 has a width of 600mm, which extends to correspond to the edge of the arch toward the sky hole 210.
In the removal work, after the removal of the furnace shell 300, the worker is configured to: the operation is divided into 2 shifts every day, each shift is provided with 1 safety guardian, 6 persons are used for dismantling the refractory material, and 4 persons are used for building the fence. The construction period is about 4 days by adopting a crane construction mode. In the application, the planning construction period is 4 days, and the actual completion construction period is 2 days due to the fact that the time for using a crane and erecting and arranging grids is saved; compared with the construction method adopting a crane, the construction method saves 4 persons for arranging the grids besides the crane, and saves 2 days for the actual construction period.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (3)
1. A method for dismantling a ball top refractory of a blast furnace hot blast stove is carried out by adopting dismantling equipment and is characterized in that,
the demolition apparatus includes:
the operation support comprises a support beam and a support platform; the bottom of the support beam is used for being fixed on a construction site; the support platform is connected with the top of the support beam and can extend to a vault sky-facing hole of the dome, and an operation hanging part is arranged on the support platform; and
the operation stair is detachably connected with the bottom of the operation support; the working stairway is configured to: after a working opening is formed by removing the refractory materials around the vault facing the sky hole, the working stair can extend into the dome from the working opening, and the bottom end of the working stair can extend to the refractory materials above a preset area close to the dome; the preset area is an area where an operator can stand on a refractory material to dismantle the refractory material;
the operation bracket comprises a first bracket and a second bracket which can be symmetrically arranged along the top of the ball; each support is provided with the support beam and the support platform, and one end of the support platform, which is far away from the support beam, can extend to the edge of the vault facing the sky hole;
the support beam is perpendicular to the support platform, the support beam can extend along the height direction of the dome, and the support platform can extend along the radial direction of the cross section of the dome;
a reinforcing beam is connected between the supporting beam and the support platform;
the operation stairs are obliquely arranged, and the bottom ends of the operation stairs extend towards one side close to the support beam; in the height direction of the ball top, the bottom of the operation stair can extend to the middle of the ball top;
in the radial direction of the cross section of the ball top, the operation stair is obliquely arranged from the support platform to the direction close to the inner wall of the ball top, and the bottom end of the operation stair extends to the side close to the support beam; in the height direction of the ball top, the bottom of the operation stair can extend to the middle of the ball top;
the dismantling method comprises the following steps:
the cutting furnace shell is positioned at the outer side of the top of the spherical top;
installing the operation bracket on the outer side of the dome; fixing the bottom of the support beam to a construction site, and enabling the support platform to extend to the vault upward hole;
hanging a safety rope of an operator at the operation hanging part;
dismantling the refractory material around the dome upward hole to enlarge the dome upward hole and form the operation opening;
installing the operation stair at the bottom of the operation bracket, and extending the operation stair into the dome from the operation opening; and
an operator finishes the dismantling of the refractory material above the preset area on the operation stair, and then stands on the refractory material in the preset area to continue the dismantling operation;
the operator moves down the operation stairs to remove the refractory material from the top of the dome.
2. The demolition method according to claim 1 wherein the operation of cutting the portion of the furnace shell located outside the top of the dome leaves at least partially the portion of the furnace shell close to the bottom of the dome;
and in the operation of installing the operation support on the outer side of the spherical roof, welding the bottom of the support beam with the reserved part of the furnace shell.
3. A demolition method according to claim 1 or 2, characterised in that the working stairway is configured to: the support platform is provided with a first working state which is fixed relative to the support platform and a second working state which slides relative to the support platform in the extending direction of the support platform;
when the refractory material is removed downwards from the top of the dome, the operation stair is adjusted to be close to the inner wall of the refractory material, so that an operator can finish the removal of the refractory material above the preset area on the operation stair.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011012071.5A CN112111620B (en) | 2020-09-23 | 2020-09-23 | Ball top refractory dismounting device and method for blast furnace hot blast stove |
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| CN202011012071.5A CN112111620B (en) | 2020-09-23 | 2020-09-23 | Ball top refractory dismounting device and method for blast furnace hot blast stove |
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| CN112111620B true CN112111620B (en) | 2022-02-01 |
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| CN104295077A (en) * | 2013-07-17 | 2015-01-21 | 五冶集团上海有限公司 | Annular hanging platform for mounting stove shell of hot-blast stove, and mounting and dismounting method thereof |
| CN205314521U (en) * | 2016-01-11 | 2016-06-15 | 梁军 | Quick installation and maintenance platform in boiler stove |
| CN207376081U (en) * | 2017-10-30 | 2018-05-18 | 莱芜钢铁集团有限公司 | Furnace apparatus is built in a kind of converter |
| CN209539254U (en) * | 2018-12-28 | 2019-10-25 | 徐州工业锅炉有限公司 | A kind of detachable oil oven platform staircase |
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2020
- 2020-09-23 CN CN202011012071.5A patent/CN112111620B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295077A (en) * | 2013-07-17 | 2015-01-21 | 五冶集团上海有限公司 | Annular hanging platform for mounting stove shell of hot-blast stove, and mounting and dismounting method thereof |
| CN205314521U (en) * | 2016-01-11 | 2016-06-15 | 梁军 | Quick installation and maintenance platform in boiler stove |
| CN207376081U (en) * | 2017-10-30 | 2018-05-18 | 莱芜钢铁集团有限公司 | Furnace apparatus is built in a kind of converter |
| CN209539254U (en) * | 2018-12-28 | 2019-10-25 | 徐州工业锅炉有限公司 | A kind of detachable oil oven platform staircase |
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