Blast furnace maintenance platform and cooling stave replacement method

Abstract

The present application relates to the technical field of blast furnace maintenance, and discloses a blast furnace maintenance platform and a cooling wall replacement method, wherein the guide wheel is in rolling contact with the furnace mouth steel ring, and the rolling direction is horizontal; the guide wheel is provided with a rotating frame, the rotating frame is driven by a chain fall, and the chain fall drives the rotating frame to rotate horizontally along the furnace mouth steel ring; the rotating frame is provided with a first winch and a second winch, the ends of the steel wire ropes of the first winch and the second winch are connected with a lifting platform, and the lifting platform is used for carrying workers to install the cooling wall; a hanging beam is arranged on a steel frame column between the blast furnaces, the hanging beam is provided with a hoist beam, and the hoist beam is provided with a center winch; the maintenance platform is arranged above the furnace mouth steel ring, the operator can enter the furnace from the lifting platform to install the cooling wall, and the cooling wall can be hoisted to a specified position in cooperation with the rotating frame; the replacement method has good safety, can shorten the main line construction time, does not need to set up a protection shed, and does not need to damage the furnace skin.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blast furnace maintenance, in particular to a blast furnace maintenance platform and a cooling wall replacement method. BACKGROUND

[0002] The blast furnace cooling wall is a cooling device inside the blast furnace, which is arranged between the furnace shell and the furnace lining, mainly made of cast iron, cast steel or copper, is an important water-cooled part of the blast furnace lining, and is installed at the blast furnace body, waist, belly, and hearth, etc., each with a thickness of 70-140mm and a weight of 1.5-3t.

[0003] The blast furnace cooling wall will be damaged after a long time of work, and the replacement of the blast furnace cooling wall is an important part of blast furnace maintenance. At present, there are mainly two methods for replacing the blast furnace cooling wall: one is to use hoisting equipment such as cranes and tower cranes to directly hoist the blast furnace cooling wall for replacement; the other is to adopt a scattered installation method, that is, to cut a plurality of windows in the furnace shell by gas welding, to remove a plurality of cooling walls above the cooling wall to be replaced together with the furnace shell, and to set a frame type support hoisting tool to install the blast furnace cooling wall.

[0004] The first method has the disadvantage of poor hoisting safety, and personnel cannot participate in the cooling wall replacement construction; the second method has the disadvantage of damaging the furnace shell, and has many uncertain factors, which can easily damage the cooling wall and the furnace shell that do not need to be replaced.

[0005] Patent No. 201920351293.6 discloses a structure for installing a blast furnace cooling device, which solves the above technical problems. However, it installs a lifting lug in the blast furnace, which also has the problem of damaging the furnace body. SUMMARY

[0006] The present application aims to provide a blast furnace maintenance platform and a cooling wall replacement method to solve the problem of hoisting damage to the furnace body as described in the background.

[0007] The technical solution adopted by the present application is as follows: a blast furnace maintenance platform, comprising a plurality of wheels, the number of wheels being 4, the wheels being in rolling contact with the furnace mouth steel ring, the rolling direction being horizontal; a rotating frame is installed on the wheels, the rotating frame being driven by a chain, the chain being arranged on a guide pipe, the number of guide pipes being 4, the guide pipes being arranged in a matrix on the blast furnace, the rotating frame being driven by the chain to rotate horizontally along the furnace mouth steel ring; a first winch and a second winch are installed on the rotating frame, the steel wire ropes of the first winch and the second winch being connected to a lifting platform, the lifting platform being used to carry workers to install the cooling wall; a hanging beam is installed on a steel column between the blast furnaces, the hanging beam extending above the furnace mouth steel ring, a hoist beam being installed on the hanging beam, a center winch being installed on the hoist beam, the center winch being used for simple bridge crossing and installation of the cooling wall.

[0008] Further, a cooling wall replacement method using the blast furnace maintenance platform is provided; including the following steps: hoisting the cooling wall to above the 36m platform by a 50t crane, adopting a binding type, then hoisting it into the furnace by a center winch, when the cooling wall is lowered to the designated height, personnel go down to above the lifting platform by a ladder, bind the rope, pull horizontally to install the cooling wall.

[0009] The application has the advantages that: the maintenance platform is arranged above the furnace mouth steel ring, the operator can enter the furnace to install the cooling wall from the lifting platform, and the cooling wall can be hoisted to the designated position by cooperating with the rotating frame, the replacement method is safe, the main line construction time can be shortened, and a protection shed does not need to be erected, and the furnace skin does not need to be damaged. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a main view structural schematic diagram of the material distributor after being disassembled.

[0011] Figure 2 It is a main view structural schematic diagram of the hanging beam and the center winch.

[0012] Figure 3 It is a main view hoisting structural schematic diagram of the application.

[0013] Figure 4 It is a top view structural schematic diagram of the application.

[0014] Figure 5 It is a main view structural schematic diagram of the application.

[0015] Figure 6 It is a main view sectional structural schematic diagram of the reel.

[0016] Figure 7 It is a top view structural schematic diagram of the rotating frame.

[0017] Figure 8 It is a sectional structural schematic diagram of the foot seat.

[0018] Figure 9 It is a top view structural schematic diagram of the lifting platform.

[0019] Figure 10 It is a main view structural schematic diagram of the lifting platform.

[0020] Figure 11 It is a side view structural schematic diagram of the lifting platform.

[0021] Figure 12 It is a side view structural schematic diagram of the lifting seat.

[0022] Figure 13 It is a main view structural schematic diagram of the first channel steel and the first railing.

[0023] Figure 14 It is the schematic diagram of the three-dimensional structure of the first channel steel up rod.

[0024] Figure 15 It is the schematic diagram of the three-dimensional structure of the second channel steel up rod.

[0025] Figure 16 It is the schematic diagram of the three-dimensional structure of the inclined support.

[0026] Figure 17 It is the schematic diagram of the three-dimensional structure of the inclined support up rod.

[0027] In the figure: 1, the guide wheel; 2, the furnace mouth steel ring; 3, the rotating frame; 4, the inverted chain; 5, the guide pipe; 6, the first winch; 7, the second winch; 8, the lifting platform; 9, the hanging beam; 10, the hollown beam; 11, the center winch; 12, the base; 13, the supporting wheel; 14, the center shaft; 15, the bearing; 16, the spacer sleeve; 17, the end cover; 18, the I-beam; 19, the pattern steel plate; 20, the vertical beam; 21, the foot base; 22, the rope opening; 23, the hard ladder; 24, the anti-falling device; 25, the large square manhole; 26, the hoisting nose; 27, the first channel steel; 28, the first angle steel; 29, the first railing; 30, the hanging seat; 31, the second channel steel; 32, the second angle steel; 33, the second railing; 34, the bolt hole; 35, the high-strength bolt; 36, the hinged seat; 37, the inclined cable; 38, the basket screw; 39, the side plate; 40, the supporting rod; 41, the two-way hydraulic cylinder; 42, the up rod; 43, the shaft seat; 44, the inclined support; 45, the one-way hydraulic cylinder; 46, the first bolt seat; 47, the second bolt seat. Embodiment

[0028] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0029] In the description of the present application, it is understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0030] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] As shown in Figure 1 , the cloth distributor on the furnace mouth steel ring 2 is first removed, and then the maintenance platform is built.

[0033] As shown in Figure 2 , a blast furnace maintenance platform is provided with a hanging beam 9 on the steel frame column between the blast furnaces, the hanging beam 9 extends above the furnace mouth steel ring 2, a gourd beam 10 is installed on the hanging beam 9, and a center winch 11 is installed on the gourd beam 10, which is used for simple bridge crossing and installation of cooling wall; as shown in Figure 3 , it includes a stop wheel 1, the number of stop wheels 1 is 4, the stop wheel 1 is in rolling contact with the furnace mouth steel ring 2, and the rolling direction is horizontal; a rotating frame 3 is installed on the stop wheel 1, the rotating frame 3 is driven by a reversing chain 4, as shown in Figure 4 , the reversing chain 4 is arranged on a guide pipe 5, the number of guide pipes 5 is 4, which are arranged in a matrix on the blast furnace, and drive the rotating frame 3 to rotate horizontally along the furnace mouth steel ring 2 through the reversing chain 4; a first winch 6 and a second winch 7 are installed on the rotating frame 3, the steel wire rope ends of the first winch 6 and the second winch 7 are connected with a lifting platform 8, and the lifting platform 8 is used to carry workers to install the cooling wall; as shown in Figure 5 , the present application sets a maintenance platform above the furnace mouth steel ring 2, the operator can enter the furnace from the lifting platform 8 to install the cooling wall, and cooperate with the rotating frame 3 to hoist the cooling wall to the designated position, such replacement mode has good safety, can shorten the main line construction time, and does not need to set up a protection shed, nor to damage the furnace skin.

[0034] As shown in Figure 6 , as an embodiment of optimization, the stop wheel 1 includes a base 12 and a pulley 13 with a center shaft 14, the pulley 13 is in rolling contact with the furnace mouth steel ring 2, the center shaft 14 extends into the base 12, the center shaft 14 is rotatably connected with the base 12 through two bearings 15, a spacer sleeve 16 is sleeved on the center shaft 14 between the two bearings 15, and an end cover 17 is arranged on the base 12 to seal the bearings 15.

[0035] As shown in Figure 7As shown, as an embodiment of the optimization, the rotating frame 3 includes I-beams 18, the number of which is 4, and the model is 20a, and the 4 I-beams 18 are welded to form a rectangular structure, the long section of which is larger than the furnace mouth steel ring 2, and a patterned steel plate 19 is laid on the rectangular structure, and the thickness of the patterned steel plate 19 is 10 mm; the patterned steel plate 19 is welded with the I-beams 18, and the patterned steel plate 19 covers the rectangular structure; 4 vertical beams 20 are fixed to the bottom surface of the long section of the I-beams 18, and the vertical beams 20 are arranged in the area of the inner ring of the furnace mouth and are used for connecting the sprocket 1; as shown Figure 8 As shown, the foot seat 21 is fixed to the short section of the I-beam 18, and the foot seat 21 is used for installing the first winch 6 and the second winch 7, and the rope opening 22 through which the wire rope passes is formed on the patterned steel plate 19; by limiting the structure of the rotating frame 3, the installation of the sprocket 1 is facilitated, and the positions of the first winch 6 and the second winch 7 can be adjusted according to the maintenance needs, and in addition, the I-beams 18 can be placed on the furnace mouth steel ring 2, thereby ensuring the safety of the use of the maintenance platform.

[0036] As shown Figure 2 As an embodiment of the optimization, the first winch 6 and the second winch 7 are 5t, the center winch 11 is 10t, the gourd beam 10 uses 45# I-beam 18, the lifting point uses the original platform main beam, the hanging beam 9 is H700*300; each lifting point is linked by 4 M24*90 high-strength bolts 35; the circumferential angle weld of the contact point is full welding, and the weld leg height is not less than the thickness of the flange plate; 4 clamping and welding clamps are additionally arranged on the 2 flange plates, and the clamps use -25mm*400*300 steel plates.

[0037] As shown Figure 5 As an embodiment of the optimization, the long section of the I-beam 18 of the rotating frame 3 is provided with a hard ladder 23 for lifting the platform 8 into the furnace, and the hard ladder 23 is provided with a protective cage; the installation method is as follows: the long section of the I-beam 18 of the rotating frame 3 is cut down; a ladder hole is formed in the middle of the lifting platform 8, and the hard ladder 23 is lowered to the 12-meter level through the ladder hole.

[0038] As an embodiment of the optimization, the hard ladder 23 is provided with a safety device 24, which is a commercially available product, so it is not shown in the figure, and the safety device 24 is used when the operator goes down the hard ladder 23.

[0039] As shown Figure 5 As an embodiment of the optimization, the lifting platform 8 is fed from the large square manhole 25, and 4 5-inch rope buckles of *3m are used (which are connected by being wound around the main beam of the lifting platform 8, and the beam corners need to be welded with a pipe skin), before feeding, the hooks of the two center winches 11 are hung on the lifting platform 8 by 4 rope buckles and are tied and locked, and the platform is lifted by the overhead crane, and the center winch 11 and the drop chain 4 cooperate to collect the wire rope to make the platform enter the furnace, and before entering the furnace, the movable rail that does not affect the rope buckle is installed.

[0040] As shown in Figure 3 the embodiment, the outer cover of the furnace mouth steel ring 2 is welded with a lifting nose 26, which is used to install a safety rope, and the lower end of the safety rope is installed with a protective rope. The safety rope and the protective rope are commercially available products, so they are not shown in the figure. The safety rope and the protective rope are installed: two safety ropes are extended into the furnace with a ￠8 steel wire rope to follow the lifting platform 8 to lift; the protective rope is provided with four 5-minute steel wire ropes, the upper end of which is adjusted in length at any time by a rope clamp on the rotating frame 3, and the lower end is hung on the lifting rope buckle of the lifting platform 8.

[0041] As shown in Figure 3 the embodiment, the rotating frame 3 is provided with two anti-falling devices 24. After the personnel lifting platform 8 is hung with the anti-falling device 24, the lifting platform 8 is lifted or lowered to the construction position.

[0042] As shown in Figure 9 the embodiment, the lifting platform 8 includes two first channel steels 27, the notches of the first channel steels 27 are oppositely arranged, and the notches of the first channel steels 27 are fixedly connected with first angle steels 28 arranged at equal intervals to form a ladder structure; as shown in Figure 11 the first angle steels 28 are fixedly connected with first railings 29 arranged symmetrically on the top surface to form a U-shaped frame structure, and the U-shaped frame structure is fixedly connected with a checkered steel plate 19; as shown in Figure 12 the outer side of the first channel steel 27 is fixedly connected with a hanging seat 30, as shown in Figure 13 the number of the hanging seats 30 is four, and they are arranged in a matrix. The hanging seats 30 are used to connect the steel wire ropes of the first winch 6 and the second winch 7, so that the structure of the lifting platform 8 is limited to facilitate the entry of the operator into the furnace for the installation of the cooling wall.

[0043] As shown in Figure 10 the embodiment, the notches of the first channel steels 27 are slidably connected with second channel steels 31, the number of the second channel steels 31 is two, and the second channel steels 31 are oppositely arranged; the second channel steels 31 are fixedly connected with second angle steels 32 arranged at equal intervals; the top surface of the second angle steels 32 is fixedly connected with second railings 33 arranged symmetrically to form a U-shaped frame structure; the U-shaped frame structure is fixedly connected with a checkered steel plate 19; the second channel steels 31 are arranged on both sides of the first channel steels 27 respectively; a corresponding bolt hole 34 is formed on the abutting surface of the first channel steel 27 and the second channel steel 31, and the position of the first channel steel 27 and the second channel steel 31 is fixed by a high-strength bolt 35. By changing the connection position of the high-strength bolt 35, the extension length of the second channel steel 31 can be controlled, the telescopic installation of the lifting platform 8 is realized, the cooling wall installation can be closer to the furnace wall, and when the second channel steel 31 abuts against the furnace wall, the rotation of the lifting platform 8 can be limited, which is safe.

[0044] AsFigure 10 As shown in the embodiment, the second angle steel 32 is provided with a hinge seat 36, and the hinge seat 36 is provided with a cable 37, the length of the cable 37 can be adjusted by a basket screw 38 to adapt to the expansion of the second channel steel 31, and the free end of the cable 37 is connected to the upper end of the first rail 29, so that the load-bearing capacity of the second channel steel 31 is improved, and the use is safer.

[0045] As shown in the embodiment, the first channel steel 27 is provided with a side plate 39, the side plates 39 are provided with a support rod 40, and the side wall of the support rod 40 is provided with a double-acting hydraulic cylinder 41. Figure 14 As shown in the embodiment, the first channel steel 27 is provided with a side plate 39, the side plates 39 are provided with a support rod 40, and the side wall of the support rod 40 is provided with a double-acting hydraulic cylinder 41.

[0046] As shown in the embodiment, the first channel steel 27 is provided with a side plate 39, the side plates 39 are provided with a support rod 40, and the side wall of the support rod 40 is provided with a double-acting hydraulic cylinder 41. Figure 15 As shown in the embodiment, the first channel steel 27 is provided with a side plate 39, the side plates 39 are provided with a support rod 40, and the side wall of the support rod 40 is provided with a double-acting hydraulic cylinder 41.

[0047] As shown in the embodiment, the first channel steel 27 is provided with a side plate 39, the side plates 39 are provided with a support rod 40, and the side wall of the support rod 40 is provided with a double-acting hydraulic cylinder 41. Figure 16 As shown in the embodiment, the first channel steel 27 is provided with a side plate 39, the side plates 39 are provided with a support rod 40, and the side wall of the support rod 40 is provided with a double-acting hydraulic cylinder 41.

[0048] As shown in the embodiment, the first channel steel 27 is provided with a side plate 39, the side plates 39 are provided with a support rod 40, and the side wall of the support rod 40 is provided with a double-acting hydraulic cylinder 41. Figure 16 As shown in the embodiment, the first channel steel 27 is provided with a side plate 39, the side plates 39 are provided with a support rod 40, and the side wall of the support rod 40 is provided with a double-acting hydraulic cylinder 41.

[0049] like Figure 17 As shown, as an optimization of the embodiment, a support rod 40 is fixedly connected between the inclined supports 44, and a bidirectional hydraulic cylinder 41 is installed on the side wall of the support rod 40; a push rod 42 is installed on the piston end of the bidirectional hydraulic cylinder 41, the push rod 42 is used to extend and press against the furnace wall, and the push rod 42 is slidably connected to the inclined support 44. By setting the push rod 42, the support range of the lifting platform 8 can be increased, which is used to limit the rotation of the (longitudinal) lifting platform 8.

[0050] Furthermore, a method for replacing the cooling wall using the aforementioned blast furnace maintenance platform is proposed, including the following steps: the cooling wall is hoisted to a 36m platform using a 50t overhead crane, the hoisting is done by binding, and then the central winch 11 is used to vertically lift it into the furnace. After the cooling wall is lowered to the installation elevation, personnel climb down to the top of the lifting platform 8 via a hard ladder 23, tie ropes, and pull the cooling wall horizontally to install it.

[0051] Further, the specific steps (1): The cooling wall is first transported to the 36-meter platform on the top of the furnace by the furnace top crane, and then the cooling wall is sent to the top of the rotating frame 3 by the newly installed 10t central hoist 11 on the top of the furnace.

[0052] Further, the specific steps (2): The 10t central winch 11 at the center of the furnace top material tank is raised to a height of 50m, and the hook head is sealed with a protective card to prevent the rope buckle from falling off.

[0053] Further, specific steps (3): During the hoisting of the cooling wall, personnel should go to the edges of both sides of the lifting platform 8, and after the lower part of the cooling wall is brought to the upper part of the lifting platform 8, personnel will start to pull the cooling wall for construction.

[0054] Further, the specific steps (4): To install the cooling wall in place, the lifting ring of the cooling wall needs to be pulled with a rope buckle, and the cooling wall is pulled into place through the furnace skin hole by the external chain hoist 4.

[0055] Further, the specific steps (5): The cooling wall is installed in place, and a "U" shape is made by using the water pipe hole next to it and Φ20 round steel and welded to the vertical seam between the furnace skin cooling walls; two ropes are threaded to hold the cooling wall, and the chain hoist 4 is used to pull it into place.

[0056] Further, the specific steps (6): Before installation, the cooling wall needs to be pressure tested on-site.

[0057] As an example of optimization, the step (4) uses 5t inverted chain 4 to lift the rotating frame 3 10-20mm, rotates the rotating frame 3 by horizontal inverted chain 4, and after positioning, lowers the rotating frame 3 on the furnace mouth flange, and inserts a stop pin in the flange bolt hole 34 to fix; the four stop wheels ensure that the axis is misaligned with the center of the flange by less than 100mm. The hoisting rotatable frame 3 is installed and erected on the furnace mouth flange by the furnace top crane and inverted chain 4, the rotating frame 3 is fixed by inserting a pin shaft in the flange bolt hole 34, the horizontal rotation uses inverted chain 4, the lifting point of which is arranged on the four outlet pipes, the four stop wheels 1 are used to prevent horizontal displacement by clamping in the inner ring of the flange, and the stop wheel 1 is 20-40mm away from the inner mouth of the flange;

[0058] As an example of optimization, the step (4) uses 2 winch slides to set lifting points on both ends of the rotating frame 3 to lift, and the stop wheel 1 prevents the rotating frame 3 from moving horizontally.

[0059] As an example of optimization, the step (5) reduces the shaking by inserting the telescopic jacks 42 against the furnace wall after the lifting platform 8 is positioned.

[0060] Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art can make modifications, improvements, and equivalent replacements to the technical solutions recorded in the foregoing examples, or make modifications, improvements, and equivalent replacements to part of the technical features, as long as they are within the spirit and principles of the present application. Any modifications, equivalent replacements, improvements, etc. made should be included in the protection scope of the present application.

Claims

1. A blast furnace maintenance platform comprising a bogie (1), characterised in that The stop wheel (1) is in rolling contact with the furnace mouth steel ring (2), and the rolling direction is horizontal; the stop wheel (1) is provided with a rotating frame (3), the rotating frame (3) is driven by the inverted chain (4), and the rotating frame (3) is driven by the inverted chain (4) to rotate horizontally along the furnace mouth steel ring (2); the rotating frame (3) is provided with a first winch (6) and a second winch (7), the steel wire ropes of the first winch (6) and the second winch (7) are connected with a lifting platform (8), and the lifting platform (8) is used for carrying workers to install the cooling wall; a hanging beam (9) is arranged on the steel frame column between the blast furnaces, the hanging beam (9) is provided with a hoist beam (10), and the hoist beam (10) is provided with a center winch (11); the lifting platform (8) comprises first channel steels (27), the number of the first channel steels (27) is 2, and the recesses of the first channel steels (27) are provided with first angle steels (28); a first railing (29) is arranged on the top surface of the first angle steel (28), forming a U-shaped frame structure, and a patterned steel plate (19) is arranged on the U-shaped frame structure; the outer side of the first channel steel (27) is provided with a hanger (30), and the hanger (30) is used for connecting the steel wire ropes of the first winch (6) and the second winch (7); the recesses of the first channel steels (27) are slidably connected with second channel steels (31); the second channel steels (31) are provided with second angle steels (32) between them; a second railing (33) is arranged on the top surface of the second angle steel (32), forming a U-shaped frame structure; a patterned steel plate (19) is arranged on the U-shaped frame structure; a one-to-one corresponding bolt hole (34) is formed on the abutting surface of the first channel steel (27) and the second channel steel (31), and the positions of the first channel steel (27) and the second channel steel (31) are fixed by high-strength bolts (35); the bottom surface of the first channel steel (27) is fixedly connected with an axle seat (43), an inclined support (44) is rotatably connected to the axle seat (43), the rotation direction of the inclined support (44) is vertical, the waist of the inclined support (44) is hingedly connected with a one-way hydraulic cylinder (45), the tailstock of the one-way hydraulic cylinder (45) is hingedly connected with the second channel steel (31), when the second channel steel (31) is pulled out, the one-way hydraulic cylinder (45) is elongated, the inclined support (44) is rotated downward, and the inclined support (44) is used for pressing the furnace wall obliquely downward; the waist of the inclined support (44) is provided with a first bolt seat (46), the first bolt seat (46) is used for connecting the one-way hydraulic cylinder (45), and the outer side of the first channel steel (27) is provided with a second bolt seat (47), the second bolt seat (47) is used for connecting the one-way hydraulic cylinder (45), and the one-way hydraulic cylinder (45) can be connected with the first bolt seat (46) or the second bolt seat (47).

2. A blast furnace maintenance platform according to claim 1, characterised in that The inverted chain (4) is arranged on the guide pipe (5), and the number of the guide pipes (5) is 4, which are arranged in a matrix on the blast furnace.

3. A blast furnace maintenance platform according to claim 1, characterised in that The number of the stop wheels (1) is 4, and the stop wheel (1) comprises a base (12) and a supporting wheel (13) with a central shaft (14), and the central shaft (14) is rotatably connected with the base (12).

4. A blast furnace maintenance platform according to claim 1, characterised in that The rotating frame (3) comprises I-beams (18), four I-beams (18) are welded to form a rectangular structure, the long section of the rectangular structure is larger than the furnace mouth steel ring (2), and a checkered steel plate (19) is laid on the rectangular structure; four vertical beams (20) are arranged on the bottom surface of the long section I-beam (18), the vertical beams (20) are arranged in the area of the inner ring of the furnace mouth, and the vertical beams (20) are used for connecting the stop wheel (1); a foot base (21) is arranged on the short section I-beam (18), and the foot base (21) is used for mounting the first winch (6) and the second winch (7).

5. A blast furnace maintenance platform according to claim 1, characterised in that The long section I-beam (18) of the rotating frame (3) is provided with a hard ladder (23), the hard ladder (23) is used for accessing the lifting platform (8) in the furnace, and the hard ladder (23) is provided with a protective cage.

6. A blast furnace maintenance platform according to claim 1, characterised in that The second angle steel (32) in the middle is provided with a hinged seat (36), the hinged seat (36) is provided with a cable-stayed rope (37), the cable-stayed rope (37) can adjust the length through a flower basket screw (38) to adapt to the expansion of the second channel steel (31), and the free end of the cable-stayed rope (37) is connected with the upper end of the first railing (29).

7. A blast furnace maintenance platform according to claim 1, characterised in that The first channel steel (27) is provided with side plates (39), support rods (40) are arranged between the side plates (39), and bidirectional hydraulic cylinders (41) are arranged on the side walls of the support rods (40); the piston end of the bidirectional hydraulic cylinder (41) is provided with a jacking rod (42), and the jacking rod (42) is used for extending to abut against the furnace wall.

8. A method of replacing a stave cooler in a blast furnace using the blast furnace maintenance platform according to any one of claims 1 to 7; characterized in that The method comprises the following steps: The cooling wall is lifted by a crown block to above the 36m platform, the lifting is in the form of binding, then the cooling wall is vertically lifted into the furnace by the center winch (11), when the cooling wall is lowered to the designed height, personnel go to above the lifting platform (8) through the hard ladder (23), the ropes are tied, the cooling wall is horizontally pulled and installed.

Images