A disassembly device and disassembly method for the central component of a blast furnace top burden distribution device

Abstract

The present application provides a disassembly device and a disassembly method for the central component of a blast furnace top burden distribution device, which relates to the technical field of blast furnace metallurgical equipment and includes a connecting piece, a top beam, an ejecting piece, and a hanging plate; there are several ejecting pieces, which are arranged on the top beam and are detachably connected to the top beam; the hanging plate is arranged on the top beam and is connected to the top beam; the connecting piece, the top beam, and the hanging plate are arranged and connected in sequence. The present application provides a disassembly device for the central component of a blast furnace top burden distribution device, which can greatly improve the maintenance operation efficiency, avoid the impact on the blast furnace output caused by the serious delay of the maintenance time due to the difficult replacement of the central throat pipe of the burden distribution device, and ensure the normal blast production order of the blast furnace; the present application is applicable to the replacement of the central throat pipe of the blast furnace top burden distribution device of various large and extra-large blast furnaces, avoids the serious impact on the blast furnace production caused by the long-term operation of the central throat pipe of the blast furnace top burden distribution device with diseases due to the difficult replacement, and ensures the smooth and stable production of the blast furnace.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace metallurgical equipment, and particularly to a disassembly device and a disassembly method for a central component of a blast furnace top burden distribution device. Background Art

[0002] In the prior art, the iron-making blast furnace is a 2650m 3 large blast furnace, and the top of the furnace adopts a PW-type parallel charging device. Through the N1 main belt, various iron-making raw materials enter the left and right receiving hoppers, upper seal valves, and bins respectively through the reversing chute. After being metered in the weighing hopper, the upper seal valve and the gas recovery valve are closed, and the equalizing valve is opened to press the bin to be equal to the furnace pressure; when the furnace burden surface drops to the specified burden line, the sounding rod is lifted to the original position, the lower seal valve and the flow regulating valve are opened, and the furnace burden passes through the intermediate funnel, bellows, short section, and the central throat pipe of the burden distribution device. The furnace burden starts the burden distribution chute according to the required burden distribution angle and number of circles and evenly distributes the material in the furnace. The burden distribution device is a key device for completing the burden distribution work in the bell-less top furnace equipment. The burden distribution device is driven by two AC variable-frequency motors respectively. After being decelerated by the planetary reducer, water-cooled transmission gearbox, chute tilting reduction gearbox, etc., the burden distribution chute of the burden distribution device can swing and rotate. After the material flows of various raw materials fall onto the burden distribution chute through the central throat pipe, the raw materials fall to different positions in the furnace under the combined action of the swing and rotation of the burden distribution chute. The central throat pipe is installed in the center of the burden distribution device and is composed of a lining plate and a bushing. Since about 13,000 tons of materials are transported into the furnace every 24 hours, reaching about 4.55 million tons in a year, the central throat pipe needs to be replaced regularly after long-term wear. When replacing the central throat pipe of the burden distribution device, the working conditions are very difficult, the construction efficiency is low, and the construction period is long. How to improve the replacement efficiency of the central throat pipe of the burden distribution device has become an urgent problem to be solved. Summary of the Invention

[0003] The purpose of the present invention is to provide a disassembly device for a central component of a blast furnace top burden distribution device, which has the beneficial effects of greatly improving the maintenance operation efficiency and ensuring the smooth and stable production of the blast furnace, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A disassembly device for a central component of a blast furnace top burden distribution device, comprising:

[0006] A connecting piece;

[0007] A top beam, which is connected to the connecting piece;

[0008] A plurality of ejecting members, which are provided on the top beam and are detachably connected to the top beam;

[0009] The suspension plate is arranged on the top beam and connected to the top beam; the connecting piece, the top beam, and the suspension plate are arranged and connected in sequence.

[0010] As a further solution of the present invention: the connecting piece is a connecting blind plate, and the connecting blind plate is connected to the top beam.

[0011] As a further solution of the present invention: screw holes are provided on the connecting blind plate.

[0012] As a further solution of the present invention: the top beam is arranged between the connecting blind plate and the suspension plate and is respectively connected to the connecting blind plate and the suspension plate.

[0013] As a further solution of the present invention: the length of the top beam is greater than the lengths of the connecting blind plate and the suspension plate.

[0014] As a further solution of the present invention: the ejecting member is a set screw, screw holes are provided on the top beam, and the set screw is arranged on the top beam and connected to the top beam.

[0015] As a further solution of the present invention: the number of the set screws is four, and the height of the set screws is greater than the height of the top beam.

[0016] As a further solution of the present invention: two suspension plate holes are provided on the suspension plate.

[0017] Based on the same inventive concept, the present application also provides a method for disassembling the central component of a blast furnace top burden distribution device, and the method for disassembling the central component of the blast furnace top burden distribution device includes:

[0018] Install the prepared connecting blind plate by using the bolt holes on the top surface of the central throat flange; install the top beam through the suspension plate holes, and screw four set screws into the screw holes of the top beam; after the heads of the set screws contact the supporting plane of the central throat, tighten each set screw evenly at the same time, and the 10t chain block follows up, and the central throat is jacked up and raised; after the raising amount exceeds the length of the positioning and mating surface of the central throat, remove the four set screws and pull out the top beam; pull the 10t chain block and lift the central throat out from the inspection hole in the middle of the weighing hopper; use the 15t hook of the top furnace crane to cooperate and place the central throat on the top furnace platform; remove the connecting blind plate; carefully clean the mating surface of the central throat support.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The present application provides a disassembly device for the central component of the blast furnace top burden distribution device, which can greatly improve the maintenance operation efficiency, avoid the impact on the blast furnace output caused by the serious delay of the maintenance time due to the difficult replacement of the central throat pipe of the burden distribution device, and ensure the normal air supply production order of the blast furnace; this application is applicable to the replacement of the central throat pipe of the blast furnace top burden distribution device of various large and extra-large blast furnaces, avoiding the serious impact on the blast furnace production caused by the long-term operation of the central throat pipe of the blast furnace top burden distribution device with problems due to difficult replacement, and ensuring the smooth and stable production of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0022] In order to more fully understand the present application and its beneficial effects, the following will be described in conjunction with the drawings. Among them, the same reference numerals represent the same parts in the following description.

[0023] Figure 1 FIG. is a schematic structural diagram of a disassembly device for the central component of the blast furnace top burden distribution device provided by an embodiment of the present application.

[0024] Figure 2 FIG. is a side view of a disassembly device for the central component of the blast furnace top burden distribution device provided by an embodiment of the present application.

[0025] Figure 3 FIG. is a usage state diagram of a disassembly device for the central component of the blast furnace top burden distribution device provided by an embodiment of the present application.

[0026] Reference numerals in the figure:

[0027] 1, connecting blind plate; 2, hanging plate; 3, top beam; 4, jackscrew; 5, central throat pipe; 6, contact central throat pipe support; 7, bushing; 8, lining plate; 9, screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0029] Please refer to the attached Figures 1 to 3 , an embodiment of the present application provides a disassembly device for the central component of the blast furnace top burden distribution device, including:

[0030] Connecting piece;

[0031] Top beam 3, the top beam 3 is fixedly connected to the connecting piece;

[0032] Ejecting piece, there are several ejecting pieces, the ejecting pieces are arranged on the top beam 3 and are detachably connected to the top beam 3;

[0033] Hanging plate 2, the hanging plate 2 is arranged on the top beam 3 and is fixedly connected to the top beam 3; the connecting piece, the top beam 3, and the hanging plate 2 are arranged and connected in sequence; further, there are two hanging plate holes on the hanging plate 2;

[0034] In a preferred embodiment of the present invention, the connecting piece is a connecting blind plate 1, and the connecting blind plate 1 is fixedly connected to the top beam 3; further, there are screw holes on the connecting blind plate 1. The present application provides a disassembly device for the central component of the blast furnace top burden distribution device, which can greatly improve the maintenance operation efficiency, avoid the influence on the blast furnace output caused by the serious delay of the maintenance time due to the difficult replacement of the central throat pipe 5 of the burden distribution device, and ensure the normal air supply production order of the blast furnace; the present application is applicable to the replacement of the central throat pipe 5 of various large and extra-large blast furnace top burden distribution devices, avoids the serious influence on the blast furnace production caused by the long-term operation of the central throat pipe 5 of the blast furnace top burden distribution device with diseases due to difficult replacement, and ensures the smooth and stable production of the blast furnace.

[0035] In a preferred embodiment of the present invention, the top beam 3 is arranged between the connecting blind plate 1 and the hanging plate 2 and is fixedly connected to the connecting blind plate 1 and the hanging plate 2 respectively; further, the length of the top beam 3 is greater than the lengths of the connecting blind plate 1 and the hanging plate 2.

[0036] In a preferred embodiment of the present invention, the ejecting piece is a jackscrew 4, there are screw holes on the top beam 3, the jackscrew 4 is arranged on the top beam 3 and is threadedly connected to the top beam 3; further, the number of the jackscrews 4 is four, and the height of the jackscrew 4 is greater than the height of the top beam 3.

[0037] The present application provides a disassembly device for the central component of the blast furnace top burden distribution device. By designing and machining bolt holes on the flange at the top of the bushing 7 on the central throat pipe 5, assembling it with the prepared connecting blind plate 1, and cooperating with the top beam 3 and the jackscrew 4, the central throat pipe 5 can be quickly jacked up and lifted through the hanging plate 2; the connecting blind plate 1 not only plays a role in fixing the top of the central throat pipe 5, but also is used to seal the upward flow of gas in the furnace, playing a role in protecting the safety of on-site operators.

[0038] Based on the same inventive concept, the present application also provides a disassembly method for the central component of the blast furnace top burden distribution device. The disassembly method for the central component of the blast furnace top burden distribution device includes:

[0039] Using the bolt holes on the top flange surface of the central throat pipe 5, install the prepared connecting blind plate 1, that is, thread-connect the connecting blind plate 1 to the bushing 7 on the central throat pipe 5 through the screw 9; pass through the hole of the hanging plate 2 and install the top beam 3, and screw four jackscrews 4 into the screw holes of the top beam 3; after the head of the jackscrew 4 touches the plane of the central throat pipe support 6, tighten each jackscrew 4 evenly at the same time, and the 10t chain block follows up, and the central throat pipe 5 is jacked up and raised; after the raising amount exceeds the length of the positioning and mating surface of the central throat pipe 5, remove the four jackscrews 4 and pull out the top beam 3; pull the 10t chain block and lift out the central throat pipe 5 from the inspection hole in the middle of the weighing hopper; with the cooperation of the 15t hook of the furnace top overhead crane, place the central throat pipe 5 on the furnace top platform; remove the connecting blind plate 1; carefully clean the mating surface of the support of the central throat pipe 5.

[0040] This application provides a disassembly device for the central component of the burden distribution device at the top of a blast furnace, and the specific working process is as follows:

[0041] The first step: Stop the blast of the blast furnace, reduce the pressure and temperature of the charge, open the relief valve, and successfully ignite the furnace throat; close the valves of equalizing gas, nitrogen, cooling water, and lubricating oil; discharge and replace the gas and nitrogen in the charging equipment and the bunker, and the construction conditions are met; align the distributing chute with the chute replacement hole and stop the machine.

[0042] The second step: Open the inspection hole cover in the middle of the top of the weighing hopper, the triangular inspection hole cover of the middle funnel, and the inspection hole cover of the water-cooled airtight box; set a 10t chain block with an extended chain above the inspection hole in the middle of the top of the weighing hopper; hang two rope buckles on the hook of the chain block, and one of the rope buckles is strung with a 5t chain block to facilitate leveling during hoisting.

[0043] The third step: Remove the bolts of the upper and lower flanges of the short section; compress and temporarily fix the corrugated expansion joint, hang the tool and lock the short section, pry the short section loose and pull it out from the side; place it on the furnace top platform and replace its lining plate 8 for standby.

[0044] The fourth step: Remove the annular wear-resistant lining plate 8 and the centering device of the wear-resistant lining plate 8 inside the corrugated expansion joint.

[0045] The fifth step: Using the bolt holes on the top flange surface of the central throat pipe 5, install the prepared connecting blind plate 1, that is, thread-connect the connecting blind plate 1 to the bushing 7 on the central throat pipe 5 through the screw 9; pass through the hole of the hanging plate 2 and install the top beam 3, and screw four jackscrews 4 into the screw holes of the top beam 3; after the head of the jackscrew 4 touches the plane of the central throat pipe support 6, tighten each jackscrew 4 evenly at the same time, and the 10t chain block follows up, and the central throat pipe 5 is jacked up and raised; after the raising amount exceeds the length of the positioning and mating surface of the central throat pipe 5, remove the four jackscrews 4 and pull out the top beam 3; pull the 10t chain block and lift out the central throat pipe 5 from the inspection hole in the middle of the weighing hopper; with the cooperation of the 15t hook of the furnace top overhead crane, place the central throat pipe 5 on the furnace top platform; remove the connecting blind plate 1; carefully clean the mating surface of the support of the central throat pipe 5.

[0046] Step 6: Install the connecting blind plate 1 on the flange surface of the new central throat pipe 5; carefully adjust the length of the hoisting rope buckle to ensure the verticality of the central throat pipe 5; cooperate the overhead crane with the 10t chain block, hoist it above the middle maintenance hole at the top of the weighing hopper; slowly lower the 10t chain block, and apply a thin layer of butter on the mating surface of the central throat pipe 5; after the central throat pipe 5 is in place, remove the connecting blind plate 1; remove the 10t chain block;

[0047] Step 7: Place the gasket on the plane of the central throat pipe 5, and reinstall the short section; install the connecting bolts of the lower flange of the short section, and tighten the bolts according to the fixed sequence and tightening torque; remove the temporary fixation of the corrugated expansion joint, stretch the corrugated expansion joint, connect it with the short section, install its connecting bolts, and tighten the connecting bolts according to the specified sequence and tightening torque; install the centering device of the wear-resistant lining plate 8 inside the corrugated expansion joint, the annular wear-resistant lining plate 8;

[0048] Step 8: Clean the flange of each manhole and the flange of the maintenance hole, pad the gasket well, cover each manhole cover and maintenance hole cover, install and tighten their connecting bolts, and clean the construction site;

[0049] The present application provides a disassembly device and a disassembly method for the central component of the blast furnace top burden distribution device, which fully meet the standardized and standardized replacement requirements of the central throat pipe 5 of the blast furnace top burden distribution device, and greatly improve the replacement efficiency of the central throat pipe 5 of the burden distribution device, truly achieving the effect of getting twice the result with half the effort, avoiding the impact on the blast furnace output caused by the serious delay of the maintenance time due to the difficult replacement of the central throat pipe 5 of the burden distribution device, and ensuring the normal air supply production order of the blast furnace; it is applicable to the replacement of the central throat pipe 5 of the blast furnace top burden distribution device of various large and extra-large blast furnaces, avoiding the serious impact on the blast furnace production caused by the long-term operation of the central throat pipe 5 of the blast furnace top burden distribution device with diseases due to difficult replacement, and ensuring the stable production of the blast furnace.

[0050] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0051] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0052] Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A method for disassembling the central component of a blast furnace top burden distribution device, characterized in that, Including: Connecting piece; Roof beam, which is connected to the connecting piece; Ejecting piece, there are several ejecting pieces, which are arranged on the roof beam and are detachably connected to the roof beam; Hanging plate, which is arranged on the roof beam and is connected to the roof beam; the connecting piece, the roof beam, and the hanging plate are arranged and connected in sequence; The connecting piece is a connecting blind plate, and the connecting blind plate is connected to the roof beam; The ejecting piece is a jackscrew, screw holes are provided on the roof beam, and the jackscrew is arranged on the roof beam and is connected to the roof beam; Central throat pipe, bolt holes are machined on the flange at the top of the bushing of the central throat pipe; Weighing hopper, a 10t chain block with an extended chain is arranged above the middle inspection hole of the weighing hopper; The method for disassembling the central component of the blast furnace top burdening device includes: Using the bolt holes on the top surface of the flange of the central throat pipe to install the prepared connecting blind plate; Pass through the hanging plate hole to install the roof beam, and screw four jackscrews into the screw holes of the roof beam; after the head of the jackscrew touches the supporting plane of the central throat pipe, tighten each jackscrew evenly at the same time, and the 10t chain block follows up, and the central throat pipe is jacked up and raised; after the lifting amount exceeds the length of the positioning and mating surface of the central throat pipe, remove the four jackscrews and pull out the roof beam; pull the 10t chain block to lift the central throat pipe out from the middle inspection hole of the weighing hopper; use the 15t hook of the top crane of the furnace top to cooperate to place the central throat pipe on the furnace top platform; remove the connecting blind plate; carefully clean the mating surface of the support of the central throat pipe.

2. The method for disassembling the central component of a blast furnace top burden distribution device according to claim 1, characterized in that, Screw holes are provided on the connecting blind plate.

3. The method for disassembling the central component of a blast furnace top burden distribution device according to claim 1, characterized in that, The roof beam is arranged between the connecting blind plate and the hanging plate and is respectively connected to the connecting blind plate and the hanging plate.

4. The method for disassembling the central component of a blast furnace top burden distribution device according to claim 1, characterized in that, The length of the roof beam is greater than the lengths of the connecting blind plate and the hanging plate.

5. The method for disassembling the central component of a blast furnace top burden distribution device according to claim 1, characterized in that, The number of the jackscrews is four, and the height of the jackscrew is greater than the height of the roof beam.

6. The method for disassembling the central component of a blast furnace top burden distribution device according to claim 1, characterized in that, Two hanging plate holes are provided on the hanging plate.

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