CN215886254U - Reducing disc for furnace body construction - Google Patents

Abstract

The utility model provides a reducing disc for furnace body construction, which comprises a retractable central main beam disc and a central disc cover plate, wherein the retractable central main beam disc comprises a central ring and movable main beam arms, the movable main beam arms are hinged on the central ring, the movable main beam arms are in a retracted state of contracting towards the direction close to the central ring and in an extended state of extending towards the direction far away from the central ring, and the size of the movable main beam arms in the retracted state is smaller than the diameter of a top ring of a blast furnace body; the central disk cover plate is detachably connected with the movable main beam arm and is installed on the movable main beam arm when the movable main beam arm is in an extending state. Compared with the prior art, the reducing disc for furnace body construction can save installation time, reduce labor cost, can be installed in the air, has large bearing weight, and can be reused.

Description

Reducing disc for furnace body construction

Technical Field

The utility model relates to the technical field of blast furnace construction, in particular to a reducing disc for furnace body construction.

Background

The blast furnace is a smelting device, and has the advantages of good technical and economic indexes, simple process, large production capacity, high labor production efficiency, low energy consumption and the like. When the blast furnace is repaired in large and middle scale, the cooling wall of the blast furnace needs to be replaced by the aid of the hanging scaffold.

As shown in fig. 1 to 3, a hanging scaffold in the prior art includes a central plate 1, a telescopic plate 2, and a lifting sling 3, wherein a main beam of the central plate 1 is a welded and fixed central main beam plate 4, and a central plate cover plate 5 is installed between main beams of the fixed central main beam plate 4. The central disc 1 is fixedly provided with a variable-diameter telescopic beam 6 which can independently stretch out and draw back, the diameter of the variable-diameter telescopic beam 6 is adjusted through stretching, and when the required size is adjusted, the variable-diameter telescopic beam 6 is covered with a variable-diameter disc cover plate 7 to form the telescopic disc 2. The central disc 1 is provided with a steel wire rope lifting sling 3, and an external winch operates the lifting of the hanging scaffold through the lifting sling 3 arranged on the central disc 1. The hanging scaffold is used as a working platform for replacing the cooling wall in the furnace during overhaul.

However, in the prior art, the diameter of the central disc 1 is too large, and is limited by the diameter of the top ring of the blast furnace body and the space size of the access door hole, so that the central disc 1 cannot be sent into the blast furnace body after being assembled. The fixed central main beam plate 4 is firstly hung into a furnace of a blast furnace, welded and assembled on a furnace waist protection shed platform built in the furnace, then a central plate cover plate 5 is welded and fixed on the manufactured fixed central main beam plate 4 to form a central plate 1, and then all the variable-diameter telescopic beams 6 are welded on the central plate 1, so that the time is long, and a large amount of labor cost is consumed. After the maintenance operation is completed, the central disc 1 needs to be lifted out of the furnace, and in order to save time, the central disc 1 is usually disassembled in a cutting and damaging manner, so that the lifting disc cannot be reused.

SUMMERY OF THE UTILITY MODEL

The hanging scaffold is characterized in that the hanging scaffold comprises a central disc, a hanging disc and a lifting device, wherein the central disc is arranged on the outer wall of the central disc, the hanging disc is arranged on the lifting device, and the lifting device is arranged on the hanging disc. The reducing disc for furnace body construction provided by the utility model is more convenient to use, can effectively reduce the labor cost, and can be recycled.

A reducing disk for furnace body construction, comprising:

the retractable central main beam disc comprises a central ring and a movable main beam arm, the movable main beam arm is hinged on the central ring, the movable main beam arm has a retracted state which is retracted towards the direction close to the central ring and an extended state which is extended towards the direction far away from the central ring, and the size of the movable main beam arm in the retracted state is smaller than the diameter of a top ring of a blast furnace body;

and the central disk cover plate is detachably connected with the movable main beam arm and is used for being arranged on the movable main beam arm when the movable main beam arm is in an extending state.

Preferably, the movable main beam arms are arranged in a plurality of numbers, the movable main beam arms are sequentially arranged at intervals along the circumferential direction of the central ring, and the central disk cover plate is used for being installed between every two adjacent movable main beam arms.

Preferably, the retractable center main beam tray further comprises:

and the movable main beam arm driving mechanism is arranged on the central ring, is connected with the movable main beam arm and is used for driving the movable main beam arm to contract or expand.

Preferably, the center plate cover plate includes:

the cover plate body is detachably connected with the movable main beam arm and is used for being mounted on the movable main beam arm when the movable main beam arm is in an extended state;

the telescopic beam is movably arranged on the cover plate body;

the telescopic beam driving mechanism is arranged on the cover plate body, and the output end of the telescopic beam driving mechanism is connected with the telescopic beam and used for driving the telescopic beam to move towards the direction close to or far away from the central ring;

the telescopic beam cover plate is detachably mounted on the telescopic beam.

Preferably, the method further comprises the following steps:

one end of the lifting sling is connected with the retractable central main beam disc, and the other end of the lifting sling is connected with the driving mechanism;

one end of the safety cable is connected with the retractable central main beam disc, and the other end of the safety cable is connected with the furnace wall.

Preferably, the retractable center main beam tray further comprises:

the hanging plate frame is vertically connected with the movable main beam arm through a connecting rod or a transition hanging rope;

the lifting sling is connected with the hanging scaffold frame.

Preferably, the movable main beam arm includes:

the first hinge arms are arranged at least two, the two first hinge arms are arranged in parallel at intervals, and one end of at least one first hinge arm is hinged with the central ring;

and two ends of the second hinge arm are respectively hinged with two adjacent first hinge arms, or one end of the second hinge arm is hinged with the first hinge arm, and the other end of the second hinge arm is hinged with the central ring.

Preferably, the movable main beam arm includes:

the outer arm is hinged with the central ring and internally provided with an accommodating space;

the inner arm is at least partially accommodated in the accommodating space and can move along the accommodating space;

and the inner arm driving mechanism is arranged on the outer arm, and the output end of the inner arm driving mechanism is connected with the inner arm and used for driving the inner arm to stretch.

Compared with the prior art, the reducing disc for furnace body construction provided by the utility model is provided with the retractable central main beam disc, the retractable central main beam disc comprises a central ring and movable main beam arms, the movable main beam arms are hinged on the central ring, and the movable main beam arms are in a retracted state of contracting towards the direction close to the central ring and in an extended state of extending towards the direction far away from the central ring. Through the shrink of activity girder arm can be realized right with stretching the regulation of reducing dish diameter to can let collapsible center girder dish can pass through the furnace body top circle or the access door hole of blast furnace smoothly, make outside the furnace body can with collapsible center girder dish is installed, has made things convenient for the installation, has also saved the time, has reduced the human cost. The movable main beam arm is arranged on the center plate cover plate, and the center plate cover plate is used for installing the movable main beam arm on the movable main beam arm when the movable main beam arm is in an extending state, so that a working platform can be formed by the movable main beam arm, and the effective use of the variable diameter plate in the maintenance process of the blast furnace can be guaranteed. In the disassembly process, the reducing disc does not need to be subjected to destructive cutting, so that the reducing disc can be recycled.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a prior art hanging scaffold;

FIG. 2 is a schematic structural view of a portion of the components of the hanging scaffold of FIG. 1;

FIG. 3 is a schematic structural view of a portion of the components of the hanging scaffold of FIG. 1;

FIG. 4 is a schematic structural view of the variable diameter disk provided in the first embodiment being hoisted in a blast furnace;

FIG. 5 is a schematic structural view of a center retractable main beam disk of the variable diameter disk of FIG. 4 in a retracted state;

FIG. 6 is a schematic structural view of a retractable center main beam disk of the variable diameter disk of FIG. 4 in an extended state;

FIG. 7 is a schematic structural view of the center plate cover plate shown in FIG. 4;

FIG. 8 is a schematic structural view of the variable diameter disk of FIG. 4 during installation;

FIG. 9 is a schematic view of an alternate angle configuration of the variable diameter disk of FIG. 4;

FIG. 10 is a schematic diagram of a portion of the components of the variable diameter disk of FIG. 4;

FIG. 11 is a schematic structural view of a retractable center main beam tray provided in accordance with the second embodiment in a retracted state;

fig. 12 is a schematic structural view of a retractable center main beam tray according to the second embodiment in an extended state;

FIG. 13 is a schematic view of a prior art waist protection canopy;

fig. 14 is a schematic view of an installation structure of a furnace waist protection shed provided in the third embodiment;

fig. 15 is a schematic view of an installation structure of a support-supported work platform according to the fourth embodiment;

fig. 16 is a schematic view of an installation structure of the special-shaped work platform provided in the fifth embodiment.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. 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 will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.

The utility model provides a reducing disc, which comprises a retractable central main beam disc and a central disc cover plate, wherein the retractable central main beam disc comprises a central ring and a movable main beam arm, the movable main beam arm is hinged on the central ring, the movable main beam arm has a retracted state which is retracted towards the direction close to the central ring and an extended state which is extended towards the direction far away from the central ring, and the size of the movable main beam arm in the retracted state is smaller than the diameter of a top ring of a blast furnace body; the central disk cover plate is detachably connected with the movable main beam arm, is used for being installed on the movable main beam arm when the movable main beam arm is in an extending state, and forms a working platform with the movable main beam arm. The reducing disc can save installation time, reduce labor cost and realize recycling.

Please refer to fig. 4-10. The embodiment provides a reducing disc 100 for furnace body construction, in particular to a hanging scaffold applied to the overhaul and middle repair of a blast furnace, which is characterized in that a working platform is formed by the hanging scaffold to facilitate maintenance construction, namely, the reducing disc 100 for furnace body construction is a reducing disc applied to the maintenance of the blast furnace. The reducing disc 100 for furnace body construction comprises a retractable center girder disc 10 and a center disc cover plate 20, the retractable center girder disc 10 comprises a center ring 11 and a movable girder arm 12, the movable girder arm 12 is hinged on the center ring 11, the movable girder arm 12 has a contraction state close to the direction of the center ring 11 and a stretching state far away from the direction of the center ring 11, the size of the movable girder arm when in the contraction state is smaller than the diameter of a top ring of a blast furnace body, namely, the length and the width of the movable girder arm 12 when in the contraction state are smaller than the diameter of the top ring of the blast furnace body, so that the movable girder arm can be directly hung into the blast furnace body. Wherein, the contraction state of the movable main beam arm 12 refers to: the movable main beam arm 12 is positioned at the end away from the hinge point closest to the central axis of the central ring 11, as shown in fig. 5. The extension state of the movable main beam arm 12 is as follows: the movable main beam arm 12 is located at the end farthest from the hinge point in the state of being located farthest from the center axis of the center ring 11, as shown in fig. 6. Such that the diameter of the collapsible center main beam disc 10 is at a minimum when the movable main beam arms 12 are in a collapsed condition and the diameter of the collapsible center main beam disc 10 is at a maximum when the movable main beam arms 12 are in an extended condition. Therefore, when the retractable central main beam disc 10 needs to be fed into the blast furnace or taken out of the blast furnace, the retractable central main beam disc 10 can smoothly pass through a furnace body top ring or an access door hole of the blast furnace in a retracted state. And when the retractable central main beam disc 10 enters the blast furnace, the retractable central main beam disc 10 can also be adjusted to be in an extended state, so that the retractable central main beam disc 10 can smoothly form a working platform, and the maintenance of the blast furnace by workers is facilitated. It can be understood that, in this embodiment, the diameter of the retractable center main beam disk 10 can be adjusted, so that the retractable center main beam disk can smoothly pass through the access passage of the blast furnace, i.e. the diameter of the retractable center main beam disk 10 in the retracted state is smaller than the access passage of the blast furnace. Therefore, the retractable central main beam plate 10 can be integrally hung in the blast furnace, and the components do not need to be gradually hung in the blast furnace for assembly, so that the time is effectively saved, and the labor cost is reduced. And because the collapsible center girder dish 10 can wholly shift out the blast furnace after finishing using, need not carry out extra dismantlement, also can effectual save time, reduce the human cost, can also realize reuse simultaneously.

The center plate cover plate 20 is detachably connected with the movable main beam arm 12 and is installed on the movable main beam arm 12 when the movable main beam arm 12 is in an extended state, so that the center plate cover plate 20 can be installed to be matched with the retractable center main beam plate 10 to form a working platform, and the use of workers is facilitated. It can be understood that, by detachably connecting the center plate cover plate 20 with the movable main beam arm 12, after use, the center plate cover plate 20 can be detached, so that the reducing plate 100 for furnace body construction can be reused. Specifically, the central disk cover plate 20 is detachably connected with the movable main beam arm 12 through a bolt 30, so that the cost is low, and the assembly and disassembly are convenient and quick.

Preferably, the movable main beam arms 12 are provided in plurality, the movable main beam arms 12 are sequentially arranged at intervals along the circumferential direction of the central ring 11, and the central disk cover plate 20 is used for being installed between two adjacent movable main beam arms 12. In this embodiment, the central plate cover plate 20 is provided with a plurality of matching movable main beam arms 12, so that the overall assembled working platform is in a disc shape, but in other embodiments, the working platform assembled by the retractable central main beam plate 10 and the central plate cover plate 20 may have other required structural shapes according to actual requirements. In the embodiment, the working platform is assembled into a disc shape, so that the working platform can be better adapted to the maintenance of the blast furnace, and is convenient to apply to the blast furnace.

Preferably, the retractable center main beam disc 10 further includes a movable main beam arm driving mechanism 13, the movable main beam arm driving mechanism 13 is installed on the center ring 11 and connected to the movable main beam arm 12, and the movable main beam arm driving mechanism 13 is configured to drive the movable main beam arm 12 to retract or extend. It can be understood that the movable main beam arm 12 is driven to contract or expand by the movable main beam arm driving mechanism 13, so that the adjusting process is quicker and more labor-saving, and the labor intensity of workers is more effectively reduced. Specifically, the movable main beam arm driving mechanism 13 may specifically adopt devices or structures such as an electro-hydraulic push rod, a screw transmission, a cylinder transmission, and the like, that is, only a driving force capable of providing the movable main beam arm 12 with outward expansion and inward contraction is required.

Preferably, the central plate cover plate 20 includes a cover plate body 21, a telescopic beam 22, a telescopic beam driving mechanism 23, and a telescopic beam cover plate 24. The cover plate body 21 is detachably connected to the movable main beam arm 12 so as to be mounted on the movable main beam arm 12 when the movable main beam arm 12 is in an extended state. The telescopic beam 22 is movably mounted on the cover plate body 21, the telescopic beam driving mechanism 23 is mounted on the cover plate body 21, the output end of the telescopic beam driving mechanism is connected with the telescopic beam 22, the telescopic beam driving mechanism 23 is used for driving the telescopic beam 22 to move towards or away from the direction of the central ring 11, and the telescopic beam cover plate 24 is detachably mounted on the telescopic beam 22. It can be understood that the telescopic beam 22 and the telescopic beam driving mechanism 23 are arranged on the cover plate body 21, so that the reducing disc 100 for furnace body construction has a larger variable diameter, and the variable diameter reducing disc can be suitable for blast furnace hanging trays with different requirements. The telescopic beam driving mechanism 23 may specifically adopt devices or structures such as an electro-hydraulic push rod, a lead screw transmission, a rack transmission and the like, that is, only a driving force capable of providing the telescopic beam 22 with movement is required.

Preferably, the reducing disc 100 for furnace body construction further comprises a lifting sling 40 and a safety cable 50, wherein one end of the lifting sling 40 is connected with the retractable central main beam disc 10, and the other end of the lifting sling 40 is connected with a driving mechanism. Specifically, the driving mechanism may be a winch, so that the variable diameter disk 100 for furnace body construction can be driven to move up and down by the winch. One end of the safety cable 50 is connected with the retractable central main beam disc 10, and the other end of the safety cable 50 is connected with the furnace wall of the blast furnace, so that the safety of the reducing disc 100 for furnace body construction during hoisting is effectively guaranteed. Specifically, the lifting sling 40 and the safety cable 50 may be connected to a lifting lug on the retractable center main beam tray 10.

Preferably, the retractable center girder 10 further includes a hanger bracket 14, the hanger bracket 14 is vertically connected to the movable girder arm 12 by a link or a transition cable, and the lifting cable 40 is connected to the hanger bracket 14. It will be appreciated that the beams on the retractable center beam tray 10 to which the lifting slings 40 are attached will be subject to diagonal tension as the lifting slings 40, safety line 50 and retractable center beam tray 10 are attached at angles that are common in use. In the embodiment, by adding the hanging plate rack 14, the hanging plate rack 14 is vertically connected with the main beam on the retractable central main beam disk 10 through the connecting rod or the excessive sling, so that the diagonal tension is eliminated, and the lifting sling 40 is connected with the hanging plate rack 14, thereby effectively ensuring the stability in the lifting process. Preferably, the safety cable 50 is also connected to the hanger bracket 14.

Preferably, in the present embodiment, the movable main beam arm 12 has a hinge structure. The movable main beam arm 12 includes three first hinge arms 121 and three second hinge arms 122, the three first hinge arms 121 are disposed in parallel, and one end of at least one first hinge arm 121 is hinged to the central ring 11. Two ends of the second hinge arm 122 are respectively hinged to the two first hinge arms 121, or one end of the second hinge arm is hinged to the first hinge arm 121, and the other end of the second hinge arm is hinged to the central ring 11. Specifically, in the present embodiment, three second hinge arms 122 are also provided, and three second hinge arms 122 are arranged in parallel. The first hinge arm 121 includes an inner hinge arm 1211, a middle hinge arm 1212 and an outer hinge arm 1213, and the second hinge arm 122 includes an inner hinge arm 1221, a middle hinge arm 1222 and an outer hinge arm 1223. The inner first hinge arm 1211 is hinged to the center ring 11 at one end and is hinged to the middle second hinge arm 1222 at the other end, the middle first hinge arm 1212 is hinged to the inner second hinge arm 1221 at one end and is hinged to the outer second hinge arm 1223 at the other end, and the outer first hinge arm 1213 is hinged to the middle second hinge arm 1222 at one end and is hinged to the outer second hinge arm 1223 at the other end. One end of the inner second hinge arm 1221 is hinged to the central ring 11, and the other end is hinged to the middle first hinge arm 1212, and specifically, the inner first hinge arm 1211 and the inner second hinge arm 1221 of the same movable main beam arm 12 are respectively hinged to the upper end and the lower end of the central ring 11. The middle second hinge arm 1222 is hinged to the inner first hinge arm 1211 at one end and hinged to the outer first hinge arm 1213 at the other end, and the outer second hinge arm 1223 is hinged to the middle first hinge arm 1212 at one end and hinged to the outer first hinge arm 1213 at the other end, thereby forming a parallel link structure. Through the connection mode, the space inside the central ring 11 is not required to be occupied during contraction, the space in the vertical direction is better utilized, and the structure can also effectively ensure the stability in the telescopic process.

The reducing disc 100 for furnace body construction provided by the embodiment is that after the telescopic beam 22 extends, a reducing disc cover plate can be installed in the area between the adjacent telescopic beam cover plates 24, so that the area of the working platform area is larger, and the use is convenient.

Because different blast furnaces are repaired in large and medium areas, the hanging scaffold in the prior art is limited by the size of the central disc, and cannot be smoothly sent into the blast furnaces after being assembled, parts need to be gradually hung into the blast furnaces for assembly, the efficiency is greatly influenced, and the labor cost is increased. In the embodiment, the diameter is adjusted by controlling the extension degree of the retractable central main beam disc 10, so that the retractable central main beam disc 10 can be smoothly hung into the blast furnace integrally without hanging parts into the blast furnace step by step, the efficiency is effectively improved, and the labor cost is reduced. The central disk cover plate 20 is arranged, and the telescopic structure is arranged on the central disk cover plate 20, so that the blast furnace hanging scaffold with a larger demand range can be used.

It should be noted that, in the hanging scaffold in the prior art, since the components need to be gradually hung into the blast furnace and then the central disk is assembled, the bearing platform needs to be installed in the blast furnace first, so that the components can be dropped on the bearing platform to be assembled, and the reducing disk 100 for furnace body construction provided in this embodiment can assemble the skeleton of the reducing disk 100 for furnace body construction in advance by assembling the retractable central main beam disk 10 in advance, so that the central disk cover plate 20 can be assembled in a suspended manner without installing the bearing platform in advance, thereby greatly improving the efficiency.

Example two

Please refer to fig. 11 and fig. 12 in combination. This embodiment provides a reducing disc, and is basically the same with reducing disc 100 structure for furnace body construction in embodiment one, the difference lies in:

the specific structure of the movable main beam arm 210 in the reducing disk provided by the embodiment is different from that of the movable main beam arm 12 in the first embodiment.

The movable main beam arm 210 comprises an outer arm 211, an inner arm 212 and an inner arm driving mechanism 213, the outer arm 211 is hinged to the central ring 220, an accommodating space is formed in the outer arm 211, and at least part of the inner arm 212 is accommodated in the accommodating space and can move along the accommodating space. The inner arm driving mechanism 213 is installed on the outer arm 211, and an output end of the inner arm driving mechanism is connected to the inner arm 212 to drive the inner arm 212 to extend and retract. That is, in this embodiment, the retractable center main beam disc is of a folding structure, and the retractable center main beam disc is further provided with a telescopic structure, so that the variable diameter of the variable diameter disc has a larger range. Specifically, the inner arm driving mechanism 213 may be any linear driving unit, such as an electric push rod.

EXAMPLE III

Please refer to fig. 13. In the prior art, due to the size limitation of a blast furnace top ring and an access door hole, the conventional furnace waist protection shed is manufactured on site at the bottom of a blast furnace after materials are hung into the bottom of the blast furnace from the blast furnace top ring 310 and the access door hole 320 and the bottom of the blast furnace is leveled and consists of a shed frame 330 and a cover plate 340, and then the shed frame is hung to the furnace waist 350 of a furnace body and welded on the wall of the furnace waist. When the furnace waist protective shed is disassembled, the furnace waist protective shed is cut and hung down to the furnace bottom, in order to shorten the time, destructive cutting is usually carried out, and then materials are hung out from the blast furnace top ring and the access door hole.

Please refer to FIG. 14. In the embodiment, the reducing disc 100 for furnace body construction is adopted, so that the assembly can be suspended in the air, the manufacture and the assembly at the furnace bottom are not needed, the furnace bottom does not need to be finished and then the assembly is carried out, and the time is saved for the installation of the furnace waist protection shed.

When the retractable central main beam disc 10 is in a retracted state, the retractable central main beam disc is directly hung from a furnace body top ring, after the retractable central main beam disc enters a furnace, the movable main beam arm driving mechanism 13 works to expand the retractable central main beam disc 10 and suspend the retractable central main beam disc below an access door hole, then the central disc cover plate 20 is respectively hung into the furnace from the furnace body top ring or the access door hole, the retractable central main beam disc 10 is respectively arranged between the expanded main beams, the retractable central main beam disc 10 is connected through bolts, the power supply and the like of the retractable beam driving mechanism 23 are connected, then the hanging disc is hung to the furnace body waist position, the retractable beam driving mechanism 23 works to adjust the diameter of the hanging disc 100 for furnace body construction to be close to the furnace waist wall, the diameter of the hanging disc cover plate is covered, and the retractable beam 22 is welded and fixed on the furnace waist wall, so that the installation of the furnace waist protection shed is quickly completed. When the diameter-variable hanging scaffold is disassembled, the diameter-variable hanging scaffold can be disassembled quickly by operating in the reverse direction of the installation process, and the disassembled diameter-variable hanging scaffold can be used repeatedly. It can be understood that the furnace waist protection shed on the blast furnace can be used in other blast furnaces within the reducing range due to the reducing disc. The quick-mounting and quick-dismounting device can also be popularized to be used for quick mounting and quick dismounting on a suspension type working platform. Of course, in other embodiments, the furnace waist protection shed can also adopt the reducing disc provided in the second embodiment.

Example four

Please refer to fig. 15. Many large-scale support type operation platforms are limited in transportation size, and are often manufactured on site, and if the requirements of quick assembly and quick disassembly are met, the operation is just difficult to be completed quickly; if the platform is a temporary working platform, the removed platform is difficult to be used again, and destructive cutting is generally adopted for removal. In this embodiment, the reducing disc 100 for furnace body construction provided in the first embodiment is adopted, and in this embodiment, the lifting sling 40 and the safety cable 50 may not be provided, but a support 410 is installed at the bottom of the reducing disc 100 for furnace body construction, so as to form a support-type platform. It can be understood that, in the technical scheme, all the parts are transported to an installation site, and the reducing disc 100 for furnace body construction, which is assembled according to the preorder installation process, is hoisted and built on the support 410, that is, the installation of the support supporting platform can be completed quickly. When the diameter-variable hanging scaffold is disassembled, the diameter-variable hanging scaffold can be quickly disassembled by operating in a reverse direction with an installation process. Of course, in other embodiments, the supporting platform may also adopt the reducing disk provided in the second embodiment.

EXAMPLE five

Please refer to fig. 16. The embodiment specifically relates to a specific application of the variable diameter disk 100 for furnace body construction provided in the first embodiment. In this embodiment, after the central plate cover plate 20 is installed, the size of each telescopic beam 22 is adjusted to make the outline of the outer end of each beam meet the requirement of square or special shape, a suitable variable diameter cover plate is installed, and then the square or special-shaped operation platform is hung, suspended or supported and fixed, so that the installation of the square or special-shaped operation platform is completed quickly. That is, the extension length of each extension beam 22 can be different according to the actual use requirement, so as to meet the required use shape. Of course, in other embodiments, the reducing disk provided in embodiment two may also be used.

EXAMPLE six

The embodiment provides an assembling method of a reducing disc, which comprises the following steps:

s1, adjusting the movable main beam arm of the retractable central main beam disc to be in a retracted state, and hoisting the retractable central main beam disc into the furnace body;

s2, adjusting the movable main beam arm of the retractable central main beam disc to be in an extended state;

and S3, mounting the central disc cover plate on the movable main beam arm to form a working platform.

Preferably, the reducing disc may adopt the reducing disc 100 for furnace body construction in the first embodiment, and the step S3 includes the following steps:

s31, mounting the cover plate body on the movable main beam arm;

s32, driving the telescopic beam to stretch through the telescopic beam driving mechanism;

and S33, mounting the telescopic beam cover plate on the telescopic beam to form a working platform.

Preferably, the following steps are further included between the step S31 and the step S32:

s311, connecting the lifting sling and the safety cable with the retractable central main beam disc, and connecting a power supply of the telescopic beam driving mechanism.

Specifically, the lifting sling and the safety cable are connected with the retractable center main beam disc through the sling disc frame.

Preferably, the method further comprises the following steps:

s4, installing variable-diameter disk cover plates between the telescopic beam cover plates;

and S5, adjusting the reducing disc to a required height through the lifting sling.

Compared with the prior art, the reducing disc provided by the utility model is provided with the retractable central main beam disc, the retractable central main beam disc comprises a central ring and movable main beam arms, the movable main beam arms are hinged on the central ring, and the movable main beam arms are in a retracted state of retracting towards the direction close to the central ring and in an extended state of extending towards the direction far away from the central ring. Through the shrink of activity girder arm can realize right with stretching the regulation of reducing dish diameter to can let collapsible center girder dish can pass through the furnace body top circle or the access door hole of blast furnace smoothly, make outside the furnace body can with collapsible center girder dish is installed, has made things convenient for the installation, has also saved the time. The movable main beam arm is arranged on the movable main beam arm, and the movable main beam arm is connected with the center plate cover plate in a detachable mode. In the disassembly process, the reducing disc does not need to be subjected to destructive cutting, so that the reducing disc can be recycled.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the utility model.

Claims (8)

1. The utility model provides a reducing disc for furnace body construction which characterized in that includes:

the retractable central main beam disc comprises a central ring and a movable main beam arm, the movable main beam arm is hinged on the central ring, the movable main beam arm has a retracted state which is retracted towards the direction close to the central ring and an extended state which is extended towards the direction far away from the central ring, and the size of the movable main beam arm in the retracted state is smaller than the diameter of a top ring of a blast furnace body;

and the central disk cover plate is detachably connected with the movable main beam arm and is used for being arranged on the movable main beam arm when the movable main beam arm is in an extending state.

2. The reducing disc for furnace body construction according to claim 1, wherein the movable main beam arms are arranged in a plurality, the movable main beam arms are sequentially arranged at intervals along the circumferential direction of the central ring, and the central disc cover plate is used for being installed between two adjacent movable main beam arms.

3. The reducing disc for furnace body construction according to claim 2, wherein the retractable center girder disc further comprises:

and the movable main beam arm driving mechanism is arranged on the central ring, is connected with the movable main beam arm and is used for driving the movable main beam arm to contract or expand.

4. The variable diameter disk for furnace body construction according to claim 3, wherein the center disk cover plate comprises:

the cover plate body is detachably connected with the movable main beam arm and is used for being mounted on the movable main beam arm when the movable main beam arm is in an extended state;

the telescopic beam is movably arranged on the cover plate body;

the telescopic beam driving mechanism is arranged on the cover plate body, and the output end of the telescopic beam driving mechanism is connected with the telescopic beam and used for driving the telescopic beam to move towards the direction close to or far away from the central ring;

the telescopic beam cover plate is detachably mounted on the telescopic beam.

5. The reducing disc for furnace body construction according to claim 4, further comprising:

one end of the lifting sling is connected with the retractable central main beam disc, and the other end of the lifting sling is connected with the driving mechanism;

one end of the safety cable is connected with the retractable central main beam disc, and the other end of the safety cable is connected with the furnace wall.

6. The reducing disc for furnace body construction according to claim 5, wherein the retractable center girder disc further comprises:

the hanging plate frame is vertically connected with the movable main beam arm through a connecting rod or a transition hanging rope;

the lifting sling is connected with the hanging scaffold frame.

7. The reducing disc for furnace body construction according to any one of claims 1 to 6, wherein the movable main beam arm comprises:

the first hinge arms are three, three first hinge arms are arranged in parallel, and one end of at least one first hinge arm is hinged with the central ring;

and two ends of the second hinge arm are respectively hinged with the two first hinge arms, or one end of the second hinge arm is hinged with the first hinge arm, and the other end of the second hinge arm is hinged with the central ring.

8. The reducing disc for furnace body construction according to any one of claims 1 to 6, wherein the movable main beam arm comprises:

the outer arm is hinged with the central ring and internally provided with an accommodating space;

the inner arm is at least partially accommodated in the accommodating space and can move along the accommodating space;

and the inner arm driving mechanism is arranged on the outer arm, and the output end of the inner arm driving mechanism is connected with the inner arm and used for driving the inner arm to stretch.

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