CN218620891U

CN218620891U - Scalable movable work platform of usefulness is overhauld in ironmaking blast furnace

Info

Publication number: CN218620891U
Application number: CN202221705017.3U
Authority: CN
Inventors: 吴江锐; 代兴荣; 戎麟; 金发敏; 赵艳红
Original assignee: 14th Metallurgical Construction Group Yunnan Installation Engineering Co ltd
Current assignee: 14th Metallurgical Construction Group Yunnan Installation Engineering Co ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2023-03-14
Anticipated expiration: 2032-07-04

Abstract

The utility model relates to an ironmaking blast furnace overhauls the device field, concretely relates to scalable activity operation platform of overhauing usefulness in ironmaking blast furnace, including upper platform, lower floor's platform, hoist engine and safety rope, upper platform mainly by the upper landing slab, the zip supports and the jib supports constitutes, the upper landing slab supports and the jib supports the furnace neck position department of fixing at ironmaking blast furnace through the zip, be equipped with a through-hole in the centre of upper landing slab, the serving of hoist engine passes the lower floor's platform that the below is suspended in midair to the through-hole, lower floor's platform is mainly by fixed vertical cover, fixed horizontal cover, fixed slant cover, the telescopic joint, fixed channel-section steel inner circle, fixed channel-section steel outer lane and cell type movable cover board are constituteed, this operation platform both can go up and down and also can stretch out and draw back, can be nimble remove in toper ironmaking blast furnace, the maintenance of quick completion stove all positions, both can regard as outside the safety platform of overhauing the throat brick, can also carry out the system to lower floor's operation personnel and cut off, form the umbrella crown protection.

Description

Scalable movable work platform of usefulness is overhauld in ironmaking blast furnace

Technical Field

The utility model relates to an ironmaking blast furnace overhauls device field, concretely relates to scalable activity work platform of usefulness is overhauld in ironmaking blast furnace.

Background

The steel production process flow has strong continuity and high automation degree, once equipment fails, the shutdown of the furnace can be caused, and huge safety risk and economic loss are brought. Therefore, the equipment is required to operate stably and reliably, and can be quickly repaired, so that the reasonable repair process and the practical and novel technology are very important.

Iron making is an important link of iron and steel production, a blast furnace is used as core equipment of an iron making process, and steel bricks and water-cooled walls of a furnace throat of the blast furnace are frequently subjected to periodic deformation and damage. The blast furnace throat is in a short cylindrical shape and is positioned at the junction position of blast furnace charging and blast furnace gas rising, and the blast furnace throat is used for receiving furnace burden, stabilizing the charge level and ensuring reasonable distribution of the furnace burden. When the furnace is in operation, the furnace mainly bears the friction when furnace burden falls and the scouring of coal gas flow in the furnace, and simultaneously bears the rapid fluctuation of temperature when batch charging is carried out, and sometimes the furnace burden is directly impacted. In order to prevent the furnace throat shell from deforming and wearing, the furnace throat is protected by the furnace throat steel bricks, so the furnace throat steel bricks are important equipment on the blast furnace. Each blast furnace is provided with dozens of furnace throat steel bricks, a steel backing ring is welded in the shell at the furnace throat part, and a hanging seat is arranged on the backing ring so as to connect and fix the furnace throat steel bricks and the furnace shell. Gaps of 20-30 mm are reserved between the furnace throat steel bricks to ensure that the steel bricks are not mutually extruded when being heated and expanded, the furnace throat steel bricks are connected into a whole circle by bolts, and the gaps between the steel bricks, the blast furnace shell and the upper and lower gaps of the steel bricks are tamped and protected by refractory castable.

In the production process of the blast furnace, under the multiple actions of mechanical force and thermal stress, the lower half section of the steel brick at higher working temperature is easy to deform and crack and protrudes towards the inside of the furnace. After the furnace throat steel bricks are raised, the shape of the furnace throat formed by the furnace throat steel bricks is irregular, the initial distribution state of furnace burden in the furnace throat is directly influenced, the distribution state of the furnace burden in the initial state determines the distribution condition of the gas flow of the blast furnace to a great extent, when the reasonable distribution state of the furnace burden is damaged due to the raised furnace throat steel bricks, the distribution of the gas flow is abnormal, the technical and economic indexes of the blast furnace are slightly deteriorated, the smooth operation of the blast furnace is damaged, even the nodulation of the blast furnace is caused, and serious accidents such as the disorder of the gas flow in the furnace, the material collapse and the like are caused.

As shown in figure 1, the structure of the iron-making blast furnace relates to a plurality of key structural parts, a plurality of structures inside the iron-making blast furnace need to be overhauled when in overhaul, the whole iron-making blast furnace is in a gourd shape and is divided into two sections, the upper part of the furnace throat steel brick 1 is thin, the middle part of the furnace throat steel brick is thicker, the lower part of the furnace throat steel brick is gradually thinned, a tuyere 2 and an iron notch 3 are arranged on the left side of the middle part, a tuyere 4 and a slag notch 5 are arranged on the right side of the middle part, and water cooling walls 6 (from a furnace hearth to the bottom of the furnace throat steel brick) are distributed on the inner walls of other positions.

As the furnace throat steel bricks and the water-cooled walls with relatively fixed damage periods, the furnace throat steel bricks and the water-cooled walls relate to more work before and after tightening in the maintenance work, the replacement speed of the furnace throat steel bricks and the water-cooled walls directly influences whether an iron-making system can rapidly reproduce, and the furnace throat steel bricks and the water-cooled walls are key nodes in a blast furnace maintenance project progress network. The blast furnace water-cooling wall is hung around the inner part of the furnace shell from the furnace hearth to the lower edge of the furnace throat steel bricks and the furnace throat steel bricks by attaching to the shell. In the maintenance engineering, the cleaning slag is required to be cleaned until an iron notch is exposed out of a furnace bottom dead iron layer, and at the moment, most of blast furnace throat steel bricks are at the high altitude of more than 20m away from the furnace bottom without operation leveling.

Generally, in the blast furnace maintenance work, there are three working conditions: firstly, the furnace throat steel bricks are independently overhauled; secondly, the water wall is independently overhauled; and thirdly, simultaneously overhauling the furnace throat steel bricks and the water-cooled wall. Under the three conditions, one or two lifting and telescopic platforms are needed, the platform can be quickly assembled and disassembled, and the safety of operating personnel can be ensured, and the iron-making blast furnace shown in figure 1 is designed with the thinnest diameter by using the common lifting platform due to different diameters, and the water-cooled wall on the inner side wall cannot be overhauled when the iron-making blast furnace is lifted to the position with the largest diameter. Therefore, how to form the operation platform, how to realize the lifting in the cone and ensure the requirements of safety, quality and construction period are the key technologies of research.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims to provide a scalable activity work platform of usefulness is overhauld in ironmaking blast furnace has the advantage that can realize going up and down, guarantee operation personnel safety, can guarantee safety, quality and time limit for a project requirement.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

a telescopic movable operation platform for overhauling inside an iron-making blast furnace, the iron-making blast furnace is in a gourd shape, the inner wall of the iron-making blast furnace is provided with a water-cooled wall and comprises an upper platform, a lower platform, a winch and a safety rope,

the upper platform mainly comprises an upper platform plate, a zipper support and a suspender support, the upper platform plate is fixed at the position of a furnace neck of the iron-making blast furnace through the zipper support and the suspender support, a through hole is arranged in the middle of the upper platform plate, a winding rope of a winch passes through the through hole to suspend the lower platform,

the lower layer platform mainly comprises a fixed vertical sleeve, a fixed transverse sleeve, fixed oblique sleeves, an expansion joint, a fixed channel steel inner ring, a fixed channel steel outer ring and a groove-shaped movable cover plate, wherein one fixed transverse sleeve and two fixed vertical sleeves are combined into a cross main body, at least four fixed oblique sleeves are respectively fixed in the positive northeast direction, the positive southeast direction, the positive southwest direction and the positive northwest direction of the cross main body to form an octagonal star main body frame, the fixed channel steel inner ring is welded at the near end of the octagonal star main body frame, the near end is close to the center of the octagonal star main body frame, the fixed channel steel outer ring is fixed at the far end of the octagonal star main body frame through a movable lifting lug, and a rolling rope of the winch suspends the octagonal star main body frame,

the far ends of the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve are respectively provided with a telescopic connecting hole, telescopic mounting holes are arranged on the telescopic joints at equal intervals, the telescopic joints are sleeved at the far ends of the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve, the distance between the telescopic energy-saving device and the fixed channel steel outer ring is adjusted along the length direction of the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve, the distance is determined by inserting a pin into the telescopic connecting holes and the telescopic mounting holes,

the slot type removable cover is the arc form to the dot of octagonal star main part frame is covered on octagonal star main part frame as the mode of a circle in central besieged city, detains on flexible connecting hole through the pin with the detachable mounting means, and slot type removable cover lid is in the peripheral position of fixed channel-section steel outer lane.

Further limiting, the groove-shaped movable cover plate is at least provided with three circles, namely a circle of groove-shaped movable cover plate, a two circle of groove-shaped movable cover plate and a three circle of groove-shaped movable cover plate which are sequentially fixed along the radial direction by taking the inner ring of the fixed channel steel as the center, and the arc lengths of the circle of groove-shaped movable cover plate, the two circle of groove-shaped movable cover plate and the three circle of groove-shaped movable cover plate are sequentially increased.

Further inject, round cell type removable cover comprises round cell type removable cover I and round cell type removable cover II, the both ends of round cell type removable cover I and round cell type removable cover II all have the installation ear, be equipped with the earhole on the installation ear, and the installation ear of round cell type removable cover I and round cell type removable cover II is the symmetric state, the contact department of two installation ears is the zigzag after the assembly together, a round cell type removable cover I and round cell type removable cover II are a set of, next-door neighbour installs in proper order on the octagon main part frame in fixed channel-section steel outer lane and encloses into a circle, the earhole of installation ear faces flexible connecting hole, flexible mounting hole, through pin joint.

The two circles of groove-type movable cover plates are composed of two circles of groove-type movable cover plates I and two circles of groove-type movable cover plates II, mounting lugs are arranged at two ends of the two circles of groove-type movable cover plates I and two circles of groove-type movable cover plates II respectively, the mounting lugs of the two circles of groove-type movable cover plates I and the two circles of groove-type movable cover plates II are in a symmetrical state, contact positions of the two mounting lugs after the two mounting lugs are assembled together are in a Z shape, one circle of two circles of groove-type movable cover plates I and one circle of two circles of groove-type movable cover plates II form a group, the two circles of groove-type movable cover plates are closely adjacent to one circle of groove-type movable cover plates and sequentially mounted on the octagonal star main body frame and enclose a circle, and lug holes of the mounting lugs face the telescopic connecting holes and the telescopic mounting holes and are connected through pins.

The three-ring groove type movable cover plate is further limited, the three-ring groove type movable cover plate comprises a three-ring groove type movable cover plate I and a three-ring groove type movable cover plate II, mounting lugs are arranged at two ends of the three-ring groove type movable cover plate I and two ends of the three-ring groove type movable cover plate II respectively, the mounting lugs of the three-ring groove type movable cover plate I and the three-ring groove type movable cover plate II are in a symmetrical state, contact positions of the two mounting lugs after the three-ring groove type movable cover plate I and the three-ring groove type movable cover plate II are assembled together are Z-shaped, the three-ring groove type movable cover plate I and the three-ring groove type movable cover plate II are in a group, the three-ring groove type movable cover plate I and the three-ring groove type movable cover plate II are closely adjacent to the two-ring groove type movable cover plate, the two-ring type movable cover plate I and the three-ring type movable cover plate II are sequentially mounted on the octagonal star main frame and enclose a ring, and ear holes of the mounting lugs face the telescopic connecting holes and the telescopic mounting holes and are connected through pins.

Further limiting, the cross overlapping amount of the telescopic joint between the telescopic joint and the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve is 500mm, and the telescopic amount of the telescopic joint between the telescopic joint and the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve is 975mm.

Further limiting, the pitch between the telescopic mounting holes on the telescopic joint is 100mm, the pitch between the telescopic connecting holes on the fixed vertical sleeve, the fixed transverse sleeve and the fixed inclined sleeve is 100mm, and the telescopic amount between the fixed vertical sleeve, the fixed transverse sleeve and the fixed inclined sleeve which are equivalent to the telescopic amount between the fixed vertical sleeve, the fixed transverse sleeve and the fixed inclined sleeve is 100mm each time.

Further limiting, the fixed vertical sleeve, the fixed transverse sleeve, the fixed oblique sleeve and the telescopic joint are all made of square pipes or round pipes, the diameter of the telescopic joint is smaller than that of the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve, and the telescopic joint is sleeved inside the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve.

Further inject, round cell type removable cover I and round cell type removable cover II, two circles of cell type removable cover I and two circles of cell type removable cover II, three circles of cell type removable cover I and three circles of cell type removable cover II are all bent into the arc shape by the channel-section steel and are made.

Compared with the prior art, the utility model beneficial effect be: 1. lifting function: the hoisting machine is used as power to realize lifting; it should be noted that, besides the safety rope for realizing the lifting, 4 safety ropes should be separately arranged, and the safety ropes and the main steel wire rope should have the same specification.

2. The telescopic function: because the blast furnace shaft consists of three sections of cones, the minimum size of the movable lower platform is determined according to the minimum inner diameter of the blast furnace shaft; the maximum size after the stretching is determined according to the maximum inner diameter of the furnace body; the expansion amount of each time is determined according to the distance between the lower platform and the furnace body when the lower platform ascends and descends by 1 meter; the ascending and descending of one meter at a time are determined according to the operation habit of people and the convenient operation degree.

3. Fast-assembling quick detach function: the novel use of the blast furnace has the advantages that after the blast furnace is stopped, the general overhaul period is very short, and in order to save time to the maximum extent, the components can be prefabricated in advance, and the components are quickly assembled after the blast furnace is stopped and put into the construction process. In addition, the lower platform is designed to be fast assembled and fast disassembled and is fixed by a bolt in consideration of the fact that the main telescopic joint is fixed in the process of rising and falling.

Generally speaking, the operation platform can be lifted and retracted, can be flexibly moved in the conical iron-making blast furnace, can be used for quickly completing the maintenance of all positions in the furnace, can be used as a safety platform for maintaining the throat steel bricks, and can be used for carrying out system partition on lower-layer operators to form umbrella top protection.

Drawings

FIG. 1 is a schematic front view of a background art;

FIG. 2 is a schematic structural view of a telescopic movable operation platform for overhauling in an iron-making blast furnace;

FIG. 3 is a schematic top view of the octagonal body frame of the lower deck;

FIG. 4 is a schematic top view of the telescopic joint of the lower deck in a contracted state;

FIG. 5 is a schematic top view of the lower deck with the expansion joint extended;

FIG. 6 is a schematic top view of a ring of groove-shaped removable cover plate I;

FIG. 7 is a schematic top view of a ring of groove-shaped removable cover plate II;

FIG. 8 is a schematic top view of a two-ring slot-type removable cover plate I;

FIG. 9 is a schematic top view of a two-ring groove-type removable cover plate II;

FIG. 10 is a schematic top view of a three-ring slot-type removable cover plate I;

fig. 11 is a schematic top view of the three-ring groove-type removable cover plate ii.

Detailed Description

In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further explained by combining with the specific embodiments.

As shown in fig. 2-11, the scalable activity work platform of overhauing usefulness in an iron-making blast furnace, iron-making blast furnace are calabash shape, and iron-making blast furnace inner wall is equipped with water-cooling wall 6, and the device includes upper platform 7, lower floor's platform 8, hoist engine 9 and safety rope 10, upper platform 7 mainly comprises upper landing slab, zip fastener support and jib support, upper landing slab passes through zip fastener support and jib support to be fixed in the furnace neck position department of iron-making blast furnace, is equipped with a through-hole in the centre of upper landing slab, and the serving 90 of hoist engine 9 passes the through-hole and suspends lower floor's platform 8 of below in midair, removes to utilize hoist engine 9 to suspend lower floor's platform 8 and reciprocate, still installs four safety ropes 10 additional to lower floor's platform 8 is being pulled to the stable mode in four corners, avoids lower floor's platform 8 random rocking after descending a take the altitude.

The lower-layer platform 8 mainly comprises a fixed vertical sleeve 80, a fixed transverse sleeve 81, a fixed oblique sleeve 82, an expansion joint 83, a fixed channel steel inner ring 84, a fixed channel steel outer ring 85 and a groove-shaped movable cover plate 86, wherein one fixed transverse sleeve 81 (4400 mm) and two fixed vertical sleeves 80 (2100 mm) are combined into a cross main body, at least four fixed oblique sleeves 82 (2059.58 mm) are respectively fixed in the positive northeast direction, the positive southeast direction, the positive southwest direction and the positive northwest direction of the cross main body to form an octagonal main body frame, the fixed channel steel inner ring 84 is welded at the near end of the octagonal main body frame, the near end is close to the center of the octagonal main body frame, the fixed channel steel outer ring 85 is fixed at the far end of the octagonal main body frame through a movable hanging lug 87, a winding rope of the winch 9 and four safety ropes 10 are hung on the octagonal main body frame, so that the octagonal main body frame keeps balance, a lifting lug is equivalent to a square frame shape, the channel steel outer ring 85 is hung at the far end of the octagonal main body frame, and the telescopic joint 83 is not influenced by retraction and retraction.

The far ends of the fixed vertical sleeve 80, the fixed transverse sleeve 81 and the fixed oblique sleeve 82 are provided with telescopic connecting holes 88, telescopic mounting holes 89 are arranged at equal intervals on the telescopic joint 83, the telescopic joint 83 (1475 mm) is sleeved at the far ends of the fixed vertical sleeve 80, the fixed transverse sleeve 81 and the fixed oblique sleeve 82, the telescopic joint 83 is provided with 8 telescopic mounting holes, the telescopic joint 83 can adjust the distance relative to the fixed channel steel outer ring 85 along the length direction of the fixed vertical sleeve 80, the fixed transverse sleeve 81 and the fixed oblique sleeve 83, the fixed channel steel outer ring 85 is fixed, the fixed vertical sleeve 80, the fixed transverse sleeve 81 and the fixed oblique sleeve 82 also keep still, only the telescopic joint 83 extends outwards, a certain distance is moved according to the hole distance, and the distance is determined and fixed by inserting the telescopic connecting holes 88 and the telescopic mounting holes 89 with pins. Cell type removable cover 86 is the arc form, uses the dot of eight angle star main part frame to cover on eight angle star main part frame as the mode of a circle of central besieged city to detain on flexible connecting hole 88 through the pin with detachable mounting means, and cell type removable cover 86 covers the peripheral position at fixed channel-section steel outer lane 85.

Preferably, in order to conveniently realize the telescopic function, the fixed vertical sleeve 80, the fixed horizontal sleeve 81, the fixed oblique sleeve 85 and the telescopic joint 83 are all made of square pipes or round pipes, the diameter of the telescopic joint 83 is smaller than that of the fixed vertical sleeve 80, the fixed horizontal sleeve 81 and the fixed oblique sleeve 82, and the telescopic joint 83 is sleeved inside the fixed vertical sleeve 80, the fixed horizontal sleeve 81 and the fixed oblique sleeve 82. The telescopic joint 83 is a square tube of 180 × 180 × 6 of Q235, the fixed vertical sleeve 80 is a square tube of 200 × 200 × 8 of Q235, the fixed transverse sleeve 81 is a square tube of 200 × 200 × 6 of Q235, and the fixed oblique sleeve 82 is a square tube of 200 × 200 × 6 of Q235. The inner fixed channel 84 is a circle of Q235 with R =1100mm, and the outer fixed channel 85 is a circle of Q235 with R =2180 mm.

In the water-cooled wall section in the blast furnace, after gap allowance is deducted in the blast furnace, the minimum size of the upper part is 4400mm, and the maximum size of the lower part is 6350mm; the expansion and contraction amount diameter is designed to 1950mm. The cross overlapping amount of the telescopic joint 83 with the fixed vertical sleeve 80, the fixed transverse sleeve 81 and the fixed oblique sleeve 82 is 500mm, and the telescopic amount of the telescopic joint 83 with the fixed vertical sleeve 80, the fixed transverse sleeve 81 and the fixed oblique sleeve 82 is 975mm. The telescopic joint 83 is equivalent to the fixed vertical sleeve 80, the fixed horizontal sleeve 81 and the telescopic amount between the fixed oblique sleeves 82 at each time is 100mm, namely, the hole distance between the telescopic mounting holes 89 on the telescopic joint 83 is 100mm, the hole distance between the telescopic connecting holes 88 on the fixed vertical sleeve 80, the fixed horizontal sleeve 81 and the fixed oblique sleeves 82 is 100mm, so that the adjusting distance extending out at each time is 100mm, the distance of one hole can be moved, and the distance of more than 2 holes can be moved.

Preferably, the groove-shaped movable cover plate 86 has at least three turns, which are respectively a circle of groove-shaped movable cover plate 860, a circle of groove-shaped movable cover plate 861 and a circle of groove-shaped movable cover plate 862 that are sequentially fixed along the radial direction by taking the fixed channel steel inner ring 84 as the center, and the arc lengths of the circle of groove-shaped movable cover plate 860, the circle of groove-shaped movable cover plate 861 and the circle of groove-shaped movable cover plate 862 are sequentially increased.

Specifically, as shown in fig. 6 and 7, the circle of groove-shaped movable cover plate 860 is composed of a circle of groove-shaped movable cover plate i 8601 and a circle of groove-shaped movable cover plate ii 8602, mounting lugs 8603 are arranged at two ends of the circle of groove-shaped movable cover plate i 8601 and the circle of groove-shaped movable cover plate ii 8602, lug holes are formed in the mounting lugs 8603, the mounting lugs 8603 of the circle of groove-shaped movable cover plate i 8601 and the circle of groove-shaped movable cover plate ii 8602 are in a symmetrical state, contact positions of the two mounting lugs 8603 after being assembled together are in a zigzag shape, the circle of groove-shaped movable cover plate i 8601 and the circle of groove-shaped movable cover plate ii 8602 form a group, the groove-shaped movable cover plate i 8601 and the circle of groove-shaped movable cover plate ii 8602 are sequentially mounted on the octagonal star main body frame next to the fixed channel steel outer ring 85 and form a ring, and the lug holes of the mounting lugs 8603 face the telescopic connecting holes 88 and the telescopic mounting holes 89, and are connected through pins. When the movable cover plate is specifically installed, a circle of groove-shaped movable cover plate I8601 and a circle of groove-shaped movable cover plate II 8602 are combined into a group, are buckled on the octagonal star main body frame in a crossed mode, and surround into a circle by taking the center of the octagonal star main body frame as the center of a circle.

Specifically, as shown in fig. 8 and 9, the two-ring groove type movable cover plate 861 is composed of a two-ring groove type movable cover plate i 8611 and a two-ring groove type movable cover plate ii 8612, mounting ears 8603 are respectively arranged at two ends of the two-ring groove type movable cover plate i 8611 and the two-ring groove type movable cover plate ii 8612, the mounting ears 8603 of the two-ring groove type movable cover plate i 8611 and the two-ring groove type movable cover plate ii 8612 are in a symmetrical state, the contact positions of the two mounting ears 8603 are in a zigzag shape after the two-ring groove type movable cover plate i 8611 and the two-ring groove type movable cover plate ii 8612 are assembled together, the two-ring groove type movable cover plate i 8611 and the two-ring groove type movable cover plate ii 8612 are sequentially mounted on the octagonal main body frame and enclose a ring next to the one-ring groove type movable cover plate 860, and the ear holes of the mounting ears 8603 face the telescopic connection holes 88 and the telescopic mounting holes 89, and are connected by pins. Also, the installation manner is the same as that of the one-turn groove-type removable cover plate 860.

Specifically, as shown in fig. 10 and 11, the three-ring groove type movable cover 862 is composed of a three-ring groove type movable cover i 8621 and a three-ring groove type movable cover ii 8622, both ends of the three-ring groove type movable cover i 8621 and the three-ring groove type movable cover ii 8622 are provided with mounting lugs 8603, the mounting lugs 8603 of the three-ring groove type movable cover i 8621 and the three-ring groove type movable cover ii 8622 are symmetrical, the contact positions of the two mounting lugs 8603 after the three-ring groove type movable cover i 8621 and the three-ring groove type movable cover ii 8622 are assembled together are in a zigzag shape, the three-ring groove type movable cover i 8621 and the three-ring groove type movable cover ii 8622 are in a group, the two adjacent groove type movable cover 861 are sequentially mounted on the octagon main body frame and enclose a ring, and the lug holes of the mounting lugs 8603 face the telescopic connecting holes 88 and the telescopic mounting holes 89, and are connected by pins. Similarly, the installation mode is the same as that of the one-circle groove type removable cover 860 and that of the two-circle groove type removable cover 861.

Preferably, the first circle of groove-shaped movable cover plate I8601, the second circle of groove-shaped movable cover plate II 8602, the first circle of groove-shaped movable cover plate I8611, the second circle of groove-shaped movable cover plate II 8612, the first circle of groove-shaped movable cover plate I8621 and the second circle of groove-shaped movable cover plate II 8622 are all made by bending channel steel into an arc shape.

All the groove-shaped movable cover plates 86 are quick-assembly movable cover plates, and the movable cover plates, the sleeve octagonal main body frame and the expansion joints are all locked and fixed through the expansion connecting holes 88 and the expansion mounting holes 89 by utilizing pins every time the movable cover plates, the sleeve octagonal main body frame and the expansion joints are expanded and contracted. The distance between the telescopic connecting holes 88 and the telescopic mounting holes 89 is calculated according to the height of 1 m of the lower-layer platform lifted in the furnace at each time according to the convenient operation of personnel, and the telescopic quantity at each time is 100mm by combining the taper of the blast furnace.

In this embodiment, the blast furnace size is 450m3, the minimum size of the upper part after deducting the clearance margin is 4400mm, and the maximum size of the lower part is 6350mm; therefore, the diameter of the expansion amount is 1950mm, and the expansion amount of 8 expansion joints is 975mm. In order to ensure safety, the telescopic joint is crossed by 500mm with the fixed vertical sleeve 80, the fixed transverse sleeve 81 and the fixed oblique sleeve 82 respectively. When the furnace throat steel bricks and the water cooled wall are not overhauled simultaneously, the platform can be completely used for respectively replacing or overhauling the furnace throat steel bricks and the water cooled wall.

The telescopic movable operation platform for overhauling in the iron-making blast furnace provided by the utility model is introduced in detail. The description of the specific embodiments is only for the purpose of helping understanding the method of the present invention and the core idea thereof, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a scalable activity work platform of overhauing usefulness in iron-making blast furnace, iron-making blast furnace are calabash shape, and iron-making blast furnace inner wall is equipped with water-cooling wall, its characterized in that: comprises an upper platform, a lower platform, a winch and a safety rope,

the upper platform mainly comprises an upper platform plate, a zipper support and a suspender support, the upper platform plate is fixed at the position of a furnace neck of the iron-making blast furnace through the zipper support and the suspender support, a through hole is arranged in the middle of the upper platform plate, a winding rope of a winding engine passes through the through hole to suspend the lower platform,

2. The telescopic movable work platform for overhauling in the iron-making blast furnace as claimed in claim 1, characterized in that: the groove-shaped movable cover plate is at least provided with three rings, namely a circle of groove-shaped movable cover plate, a two-ring groove-shaped movable cover plate and a three-ring groove-shaped movable cover plate which are sequentially fixed along the radial direction by taking the inner ring of the fixed channel steel as the center, and the arc lengths of the circle of groove-shaped movable cover plate, the two-ring groove-shaped movable cover plate and the three-ring groove-shaped movable cover plate are sequentially increased.

3. The telescopic movable work platform for overhauling in the iron-making blast furnace as claimed in claim 2, characterized in that: the round groove-shaped movable cover plate is composed of a round groove-shaped movable cover plate I and a round groove-shaped movable cover plate II, installation lugs are arranged at two ends of the round groove-shaped movable cover plate I and the round groove-shaped movable cover plate II, lug holes are formed in the installation lugs, the installation lugs of the round groove-shaped movable cover plate I and the round groove-shaped movable cover plate II are in a symmetrical state, contact positions of the two installation lugs are Z-shaped after the two installation lugs are assembled together, the round groove-shaped movable cover plate I and the round groove-shaped movable cover plate II are a group, the installation lugs are closely adjacent to fixed channel steel outer rings, the installation lugs are sequentially installed on an octagon main body frame and form a ring in a surrounding mode, and the lug holes of the installation lugs face telescopic connecting holes, the telescopic mounting holes are connected through pins.

4. The telescopic movable work platform for overhauling in the iron-making blast furnace as claimed in claim 3, characterized in that: the two-ring groove type movable cover plate is composed of a two-ring groove type movable cover plate I and a two-ring groove type movable cover plate II, mounting lugs are arranged at two ends of the two-ring groove type movable cover plate I and the two-ring groove type movable cover plate II respectively, the mounting lugs of the two-ring groove type movable cover plate I and the two-ring groove type movable cover plate II are in a symmetrical state, contact positions of the two mounting lugs are Z-shaped after the two mounting lugs are assembled together, one two-ring groove type movable cover plate I and the two-ring groove type movable cover plate II are in a group, the two-ring groove type movable cover plate I and the two-ring groove type movable cover plate II are close to one ring groove type movable cover plate and are sequentially mounted on an octagonal star main body frame and enclose one ring, and lug holes of the mounting lugs face telescopic connecting holes and telescopic mounting holes and are connected through pins.

5. The telescopic movable work platform for overhauling in the iron-making blast furnace as claimed in claim 4, characterized in that: the three-ring groove type movable cover plate is composed of a three-ring groove type movable cover plate I and a three-ring groove type movable cover plate II, mounting lugs are arranged at two ends of the three-ring groove type movable cover plate I and two ends of the three-ring groove type movable cover plate II respectively, the mounting lugs of the three-ring groove type movable cover plate I and the mounting lugs of the three-ring groove type movable cover plate II are in a symmetrical state, contact positions of the two mounting lugs are Z-shaped after the three-ring groove type movable cover plate I and the three-ring groove type movable cover plate II are assembled together, the three-ring groove type movable cover plate I and the three-ring groove type movable cover plate II are in a group, the three-ring groove type movable cover plate I and the three-ring groove type movable cover plate II are closely adjacent to the two-ring groove type movable cover plate, the two ring type movable cover plate I and the three-ring type movable cover plate II are sequentially mounted on the octagonal star main frame and enclose a ring, and lug holes of the mounting lugs face the telescopic connecting holes and the telescopic mounting holes and are connected through pins.

6. The telescopic movable work platform for overhauling in the iron-making blast furnace as claimed in claim 1, characterized in that: the cross overlapping amount of the telescopic joint between the telescopic joint and the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve is 500mm, and the telescopic amount of the telescopic joint between the telescopic joint and the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve is 975mm.

7. The telescopic movable work platform for overhauling in the iron-making blast furnace as claimed in claim 6, characterized in that: the pitch between the telescopic mounting holes on the telescopic joint is 100mm, the pitch between the telescopic connecting holes on the fixed vertical sleeve, the fixed transverse sleeve and the fixed inclined sleeve is 100mm, and the telescopic joint is equivalent to the telescopic amount between the fixed vertical sleeve, the fixed transverse sleeve and the fixed inclined sleeve which is 100mm each time.

8. The telescopic movable work platform for overhauling in the iron-making blast furnace as claimed in claim 7, wherein: the fixed vertical sleeve, the fixed transverse sleeve, the fixed oblique sleeve and the telescopic joint are all made of square tubes or round tubes, the diameter of the telescopic joint is smaller than that of the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve, and the telescopic joint is sleeved inside the fixed vertical sleeve, the fixed transverse sleeve and the fixed oblique sleeve.

9. The telescopic movable operation platform for the overhaul in the iron-making blast furnace according to any one of the claims 3 to 5, which is characterized in that: the circle groove type removable cover I and circle groove type removable cover II, two circles of groove type removable cover I and two circles of groove type removable cover II, three circles of groove type removable cover I and three circles of groove type removable cover II all are made by bending channel steel into an arc shape.