Cover-type step-type trolley, its top refractory material arrangement structure and masonry method

Abstract

The present invention discloses a hood-type step-type trolley, a refractory material arrangement structure and a masonry method thereof. The refractory material arrangement structure includes a thermal insulation layer, an expansion sealing ring, a castable periphery, a lower support brick group, a castable inner structure, a peripheral refractory brick layer, an upper load-bearing brick group, and a sealing sand layer. The expansion sealing ring is fixedly mounted on the thermal insulation layer. The castable periphery surrounds the expansion sealing ring periphery. The lower support brick group is built inside the expansion sealing ring. The lower support brick group is spaced apart from the inner circumference of the expansion sealing ring. The castable inner structure includes a main body and a peripheral edge at the outer periphery of its bottom end. The main body covers the lower support brick group. The peripheral edge is filled in the lower end of the gap. The upper end of the gap forms a sand trough. The peripheral refractory brick layer is built on the upper part of the castable periphery. The upper load-bearing brick group is built on top of the lower support brick group. The sealing sand layer is filled in the sand trough. The refractory material arrangement structure of the present invention is rationally arranged according to the heat conduction and load-bearing parts, thereby improving the service life of the refractory materials.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-temperature annealing furnaces, relates to silicon steel production equipment, and specifically relates to a hood-type walking trolley for a high-temperature annealing furnace, a refractory arrangement structure on the top of the trolley, and a masonry method for the refractory arrangement structure. Background Art

[0002] When oriented silicon steel is annealed in a walking trolley cover-type high-temperature furnace, multiple trolleys move step by step in the kiln surrounded by the furnace according to the process. The trolleys and the refractory materials on the trolleys act as a seal for the furnace bottom. The temperature in the high temperature section of the furnace can reach 1200℃, which places high requirements on the refractory materials on the trolleys. The refractory structure of the trolleys must include: thermal insulation layer, heat insulation layer, and load-bearing layer. Each part is mainly used to support the steel coils on the trolleys in the furnace, which must ensure sufficient bearing capacity and reduce heat conduction losses.

[0003] Currently, there are two ways to arrange the refractory materials on the top of the high-temperature annealing furnace trolley: one is to use all-refractory standard bricks for masonry, and the other is to use extra-large special-shaped bricks for masonry at the bottom, leaving expansion joints. The above arrangement and masonry methods are designed to leave expansion joints in the masonry to buffer the impact of thermal expansion, and the other is to facilitate material acquisition. During long-term use, the frequent loading and unloading of steel coils on the trolley has caused the refractory materials to loosen, especially the lower brick masonry, which has poor bearing capacity. As a result, all of them need to be replaced after less than a year of continuous operation. During maintenance, the entire refractory masonry is equivalent to rebuilding, which is time-consuming and costly, affecting the operation and production capacity of the furnace. Summary of the Invention

[0004] In order to solve the deficiencies in the above-mentioned prior art, the present invention proposes a refractory material arrangement structure on the top of a walking trolley for a high-temperature annealing furnace, which solves the problems of impact caused by frequent loading and unloading of steel coils, cracking of refractory materials at high temperatures, large heat energy conduction losses, high maintenance rate and cost.

[0005] In order to achieve the above technical objectives, the technical solution of the present invention is:

[0006] A refractory material arrangement structure on the top of a walking trolley for a high-temperature annealing furnace, comprising a thermal insulation layer, an expansion sealing ring, a castable periphery, a lower support brick group, a castable inner structure, a peripheral refractory brick layer, an upper load-bearing brick group, and a sealing sand layer. The thermal insulation layer is used to be laid on the trolley frame, the expansion sealing ring is fixed on the thermal insulation layer, the castable periphery surrounds the outer periphery of the expansion sealing ring, the lower support brick group is built inside the expansion sealing ring, and the outer periphery of the lower support brick group is aligned with the inner periphery of the expansion sealing ring. A preset gap is provided between the peripheral surfaces. The castable inner structure includes a main body and a peripheral edge integrally formed on the outer periphery of the bottom end of the main body. The main body is formed with a hollow hole matching and accommodating the lower support brick group to cover the lower support brick group. The peripheral edge is filled in the lower end of the gap, and a sand groove is formed correspondingly at the upper end of the gap. The outer refractory brick layer is built on the upper part of the outer periphery of the castable, and the upper load-bearing brick group is correspondingly built on the lower support brick group. The sealing sand layer is filled in the sand groove.

[0007] Furthermore, the outer periphery of the castable surrounds the outer periphery of the lower end of the expansion sealing ring, and the outer refractory brick layer is built on the top surface of the outer periphery of the castable, surrounding the outer periphery of the upper end of the expansion sealing ring. The height of the outer refractory brick layer after building is equivalent to the height of the expansion sealing ring.

[0008] Furthermore, the bottommost layer of the outer refractory brick layer extends outward by a preset length to form a side curved sealing convex portion, which is used to cooperate with the corresponding side curved sealing concave portion formed on the furnace wall. The topmost layer forms an upper curved sealing concave portion at one end and an upper curved sealing convex portion at the other end for end face curved sealing cooperation when adjacent trolleys are connected. The topmost layer forms an upper curved sealing concave portion at one end and an upper curved sealing convex portion at the other end for end face curved sealing cooperation when adjacent trolleys are connected.

[0009] Furthermore, anchoring pieces connected to the trolley frame are embedded in the periphery of the castable and the inner structure of the castable.

[0010] Furthermore, the upper load-bearing brick group includes lower load-bearing bricks and upper load-bearing bricks, the lower load-bearing bricks have concave arc grooves on their upper surfaces, and the upper load-bearing bricks have convex arc grooves on their lower surfaces, and the concave arc grooves match the convex arc grooves.

[0011] Furthermore, the refractory material arrangement structure includes a load-bearing disc, the size of which corresponds to the size of the top surface of the upper load-bearing brick group, and is used for laying on the top surface of the castable inner structure.

[0012] In addition, the present invention provides a hood-type walking trolley for a high-temperature annealing furnace, comprising a frame, a barrel cover, and the refractory material arrangement structure. The thermal insulation layer of the refractory material arrangement structure is laid on the trolley frame, and the barrel cover covers the upper load-bearing brick group of the refractory material arrangement structure, and the lower end of the barrel cover is inserted into the sand trough.

[0013] Furthermore, a plurality of air pipes are installed on the frame, extending out of the expansion sealing ring and protruding from the top surface of the upper load-bearing brick group or the top surface of the load-bearing disc, and the air pipes are used to fill or discharge protective gas into the cylinder cover.

[0014] Furthermore, the present invention provides a masonry method for the refractory material arrangement structure on the top of a walking trolley, and the masonry method is as follows:

[0015] 1) Lay a thermal insulation layer on the trolley frame;

[0016] 2) Fixedly install the expansion seal on the thermal insulation layer;

[0017] 3) Laying a lower support brick group within the expansion seal ring, with a preset gap set between the outer periphery of the lower support brick group and the inner periphery of the expansion seal ring;

[0018] 4) providing a castable material and pouring it into the expansion seal ring on the thermal insulation layer, so that the castable material flows into the gap to a predetermined height to form the periphery, and the castable material flows into the gap between the lower support brick group and covers the lower support brick group to form the main body, thereby forming the castable inner structure;

[0019] 5) Lay an upper layer of load-bearing bricks corresponding to the lower layer of supporting bricks on the top surface of the castable inner structure;

[0020] 6) pouring a casting material on the outer periphery of the expansion sealing ring to form the casting material periphery;

[0021] 7) Build an outer refractory brick layer on the top of the castable;

[0022] 8) Filling the sand trough with a sealing sand layer.

[0023] Furthermore, the lower support brick group is made of first-level high-aluminum mullite bricks and second-level high-aluminum bricks; the castable periphery and the castable inner structure are integrally cast and formed using steel fiber wear-resistant castable; the outer refractory brick layer is made of three layers of first-level high-aluminum mullite bricks.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The refractory material layout structure design on the top of the step-type trolley is reasonable. The refractory material layout of the trolley is reasonable according to the heat conduction and load-bearing parts, which improves the thermal shock resistance and increases the service life of the refractory materials.

[0026] 2. Low maintenance cost and high equipment utilization rate: The refractory casting part of the trolley is made of high-strength castables, which only need to be replaced regularly according to the damage of the top insulation bricks. The maintenance and replacement are fast and it can be put into use quickly after maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A side view of a walking carriage for a high-temperature annealing furnace according to a first preferred embodiment of the present invention;

[0028] Figure 2 for Figure 1 A cross-sectional view of the walking trolley taken along the AA direction (i.e., the main viewing direction) is shown;

[0029] Figure 3 for Figure 2 An enlarged view of point B is shown;

[0030] Figure 4 for Figure 1 Exploded view of the walking trolley shown;

[0031] Figure 5 for Figure 1 A top view of the walking trolley shown;

[0032] Figure 6 For two Figure 1 A side view of the walking trolley shown connected inside the furnace;

[0033] Figure 7 2 is a cross-sectional view of a walking carriage for a high-temperature annealing furnace according to a second preferred embodiment of the present invention.

[0034] The following are the descriptions of the reference numerals:

[0035] 100-hood-type step-by-step trolley; 10-carriage frame; 40-steel coil; 20-refractory material arrangement structure; 30-cylinder cover; 21-thermal insulation layer; 22-expansion sealing ring; 23-casting material periphery; 231-lower curved sealing convex part; 232-lower curved sealing concave part; 24-lower supporting brick group; 25-casting material inner structure; 26-outer refractory brick layer; 27-upper load-bearing brick group; 28-sealing sand layer; 241-first-level high-aluminum mullite brick; 242-second-level high-aluminum brick; 251-main body; 252-periphery; 201-anchor; 261-side curved sealing convex part; 262-upper curved sealing concave part; 281-pad; 282-quartz sand; 29-load-bearing disc; 11-trachea; 221-fiber blanket. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] like Figure 1-Figure 5As shown, a first preferred embodiment of the present invention is a hood-type walking carriage 100 for use in a high-temperature annealing furnace, configured to carry steel coils 40 for transport within the annealing furnace. The hood-type walking carriage 100 comprises a frame 10, a refractory arrangement 20 disposed atop the frame 10, and a drum cover 30. The refractory arrangement 20 is configured to carry the steel coils, and the drum cover 30 is configured to enclose the steel coils 40.

[0038] The refractory material arrangement structure 20 includes a thermal insulation layer 21, an expansion sealing ring 22, a castable periphery 23, a lower support brick group 24, a castable inner structure 25, an outer refractory brick layer 26, an upper load-bearing brick group 27, and a sealing sand layer 28. The thermal insulation layer 21 is laid on the trolley frame 10 to reduce or block the heat transfer between the refractory material and the frame 10. The thermal insulation layer 21 can be made of aluminum silicate fiber semi-rigid board, which has a better heat insulation effect. The expansion sealing ring 22 is arranged on the thermal insulation layer 21, and is used to divide the refractory material into the inner and outer sides of the expansion sealing ring 22, and can buffer the thermal expansion of the refractory material after being heated, so as to extend the service life of the refractory material. The expansion sealing ring 22 can be made of heat-resistant stainless steel. It can be understood that the expansion sealing ring 22 can be fixed on the thermal insulation layer 21, or welded to the frame 10 and protrude from the thermal insulation layer 21. In this embodiment, the expansion sealing ring 22 adopts a double ring structure formed side by side. The double rings can be connected or separated by a partition wall. When separated, the height of the partition wall can be lower than the height of the expansion sealing ring.

[0039] The castable periphery 23 surrounds the periphery of the expansion seal ring 22. Specifically, the castable periphery 23 is cast on the thermal insulation layer 21 by the castable material, surrounds the periphery of the expansion seal ring 22, and is lower than the height of the expansion seal ring 22. It can be understood that when the castable periphery 23 is cast, a template can be used to control the outer contour. Furthermore, a lower curved sealing convex portion 231 is formed at one end of the outer periphery of the castable periphery 23, and a lower curved sealing concave portion 232 is formed at the other end opposite to the outer periphery of the castable periphery 23. When two adjacent trolleys are docked side by side, the lower curved sealing convex portion 231 at one end of one trolley cooperates with the lower curved sealing concave portion 232 at one end of the other trolley to block heat transfer below the refractory arrangement structure 20 in the furnace.

[0040] The lower support brick group 24 is built within the expansion seal 22, with a predetermined gap between the outer periphery of the lower support brick group 24 and the inner circumference of the expansion seal 22. In this embodiment, two lower support brick groups 24 are built in a disk-shaped pattern within each ring of the expansion seal 22, with a predetermined gap between each lower support brick group 24 and the inner wall of the corresponding ring of the expansion seal 22. The lower support brick group 24 is composed of bricks stacked into a plurality of columns, which are then arranged in a disk-like pattern. Sector-shaped gaps are formed between adjacent columns, and the disk-shaped columns form a cylindrical center hole. The height of the lower support brick group 24 is approximately equal to, or slightly higher than, the height of the expansion seal 22. Thus, the depth of the gap between the outer periphery of the lower support brick group 24 and the inner circumference of the expansion seal 22 is approximately equal to the height of the expansion seal 22.

[0041] The lower support brick group 24 can be made of primary high-alumina mullite bricks and secondary high-alumina bricks. In this embodiment, the lower support brick group 24 includes three layers of primary high-alumina mullite bricks 241 and four layers of secondary high-alumina bricks 242 .

[0042] See also Figure 4 The castable inner structure 25 is formed by casting corresponding to each lower support brick group 24. The castable inner structure 25 is convex and includes a main body 251 and a peripheral edge 252 integrally formed on the outer periphery of the bottom end of the main body 251. The main body 251 is correspondingly formed with a hollow hole matching and accommodating the lower support brick group 24. The main body 251 covers the lower support brick group 24. The peripheral edge 252 fills the lower end of the interval and forms a sand groove at the upper end of the interval. The depth of the sand groove corresponds to the height of the expansion sealing ring 22 exceeding the top surface of the peripheral edge 252. The castable inner structure 25 is cast on the thermal insulation layer 21 and covers the lower support brick group 24. During casting, the shape can be controlled by the template. The castable fills the preset height in the interval to form the periphery. The main body 251 is formed by the castable infiltration into the gap between the brick columns of the lower support brick group 24. The position of the corresponding brick column is the hollow hole on the main body 251, and the top of the main body 251 is horizontal. After the castable inner structure 25 is formed, the height of the main body 251 is equivalent to the height of the lower support brick group 24. In this embodiment, the number of castable inner structures 25 corresponding to the lower support brick group 24 is two, and the two castable inner structures 25 can be cast and connected into one.

[0043] Furthermore, the castable outer shell 23 and the castable inner structure 25 can be integrally cast using high-strength steel fiber wear-resistant castable. The steel fibers can be hard-drawn from 301 or 304# steel. The steel fibers are staggered and arranged within the castable. The unique shape of the steel fibers significantly enhances the castable's grip. This prevents cracking after construction and protects against temperature fluctuations that could cause the castable to fall.

[0044] Furthermore, the castable outer portion 23 and the castable inner portion 25 may also be embedded with a Y-shaped anchor 201 connected to the trolley frame 10. The anchor 201 is vertically arranged in the castable outer portion 23 and the castable inner portion 25 to improve the stability of the castable outer portion 23 and the castable inner portion 25.

[0045] The outer refractory brick layer 26 is built on the top surface of the outer periphery 23 of the castable material, surrounding the outer periphery of the upper end of the expansion sealing ring 22. The height after building is roughly equivalent to the height of the expansion sealing ring 22. The outer refractory brick layer 26 can be made of first-level high-aluminum mullite bricks. In this embodiment, the outer refractory brick layer 26 adopts three layers of first-level high-aluminum mullite bricks, wherein the bottom layer of bricks extends outward by a preset length to form a side curved sealing convex portion 261 for cooperating with the corresponding side curved sealing concave portion formed on the furnace wall. An upper curved sealing concave portion 262 is formed at one end of the top layer (that is, the top layer and the adjacent middle layer are in a stepped structure), and an upper curved sealing convex portion 263 is formed at the other end (that is, the top layer protrudes outward relative to the adjacent middle layer) so that when two adjacent trolleys are connected, the end face is matched to realize the end face curved sealing between the trolleys, and the side curved sealing between the furnace wall and the end face curved sealing between the trolleys are used to block the heat transfer below the refractory material arrangement structure 20 in the furnace. For details, please refer to Figure 6 Two adjacent trolleys are connected side by side in the annealing furnace. When the two trolleys are connected, the corresponding connected end faces (the rear end face of the front trolley and the front end face of the rear trolley in the conveying direction) are connected by end face curved seals.

[0046] The upper load-bearing brick group 27 is built on top of the lower support brick group 24, with the lower end surface of the upper load-bearing brick group 27 corresponding to the shape and size of the upper end surface of the lower support brick group 24. Similarly, the upper load-bearing brick group 27 is formed by stacking bricks into several columns, which are then arranged in a disk shape, with fan-shaped gaps between adjacent columns. The columns arranged in the disk shape form a cylindrical center hole. In this embodiment, there are two upper load-bearing brick groups 27, built on the corresponding lower support brick group 24, with each column of the upper load-bearing brick group 27 correspondingly built on a column of the lower support brick group 24. Furthermore, the upper load-bearing brick group 27 includes lower load-bearing bricks and upper load-bearing bricks. The lower load-bearing bricks have concave arcuate grooves on their top surfaces, while the upper load-bearing bricks have convex arcuate grooves on their bottom surfaces, with the concave arcuate grooves corresponding to the convex arcuate grooves. The stacking stability between adjacent upper and lower brick layers is improved by the cooperation between the concave arc groove and the convex arc groove.

[0047] The sand trough is filled with a sealing sand layer 28, which comprises cotton padding 281 and quartz sand 282. The cotton padding 281 is placed on the bottom of the trough, while the quartz sand 282 fills the trough. The volume ratio of the quartz sand 282 is: 40 mesh (20%), 60 mesh (60%), and 80 mesh (20%). In this embodiment, the sealing sand layers 28 within the two rings of the expansion seal 42 are integrally connected.

[0048] Furthermore, the refractory arrangement 20 includes a load-bearing disc 29, whose dimensions correspond to the top surface of the upper layer of load-bearing bricks 27. These discs are installed atop these upper layers to support the steel coils. In this embodiment, two load-bearing discs 29 are installed atop their corresponding upper layers of load-bearing bricks 27. After each load-bearing disc 29 receives a steel coil, it is enclosed by a shroud 30, the lower end of which is inserted into the sand trough.

[0049] Furthermore, the frame 10 is equipped with a plurality of air pipes 11. The air pipes 11 extend from the expansion seal ring 22 and protrude from the top surface of the castable inner structure 25 or the top surface of the load-bearing disc 29. The air pipes 11 are used to fill or exhaust protective gas into the cylinder cover 30. If different proportions of gas need to be filled, filling can be performed through different air pipes 11. If the protective gas in the cylinder cover 30 needs to be replaced, the gas to be replaced can be first exhausted through the air pipes 11 and then filled. Preferably, at least one central air pipe is provided on the frame 10 corresponding to the central axis position of the lower support brick group 24 and the upper load-bearing brick group 27, so that gas can be directly injected into the center of the cylinder cover 30.

[0050] The present invention also provides a masonry method for the refractory material arrangement structure 20 on the top of the walking trolley 100, and the masonry method is as follows:

[0051] 1) Laying a thermal insulation layer 21 on the trolley frame 10;

[0052] 2) An expansion seal ring 22 is fixedly mounted on the thermal insulation layer 21; or an expansion seal ring 22 is welded to the vehicle frame 10 and protrudes from the thermal insulation layer 21;

[0053] 3) Lay a lower support brick group 24 within the expansion seal ring 22, with a preset gap between the outer periphery of the lower support brick group 24 and the inner periphery of the expansion seal ring 22; the height of the lower support brick group 24 is roughly equivalent to the height of the expansion seal ring 22;

[0054] 4) providing a castable material to be poured into the expansion seal ring 22 and providing a template to control the inflow space of the castable material, so that the castable material flows into the predetermined height in the interval to form the peripheral edge 252, and the castable material flows into the gap between the lower support brick group 24 and covers the lower support brick group 24 to form the main body 251, thereby forming the castable inner structure 25; the top of the main body 251 is at the same height as the lower support brick group 24; the peripheral edge 252 fills the lower end of the interval, and the corresponding upper end of the interval forms the sand groove;

[0055] 5) Laying an upper layer of load-bearing bricks 27 corresponding to the lower layer of support bricks 24 on the top surface of the castable inner structure 25 (which can also be regarded as the top surface of the lower layer of support bricks 24);

[0056] 6) pouring a castable material around the periphery of the expansion seal ring 22 to form the castable material periphery 23; specifically, providing a template to control the contour of the castable material periphery 23, the castable material periphery 23 surrounds the periphery of the expansion seal ring 22 and is lower than the height of the expansion seal ring 22, and the outer contour of the castable material periphery 23 is preferably selected to be rectangular;

[0057] 7) Building an outer refractory brick layer 26 on top of the castable outer periphery 23; the outer refractory brick layer 26 surrounds the outer periphery of the upper end of the expansion sealing ring 22, and the height after building is roughly equivalent to the height of the expansion sealing ring 22;

[0058] 8) Fill the sand tank with a sealing sand layer 28.

[0059] It is understood that steps 6) and 7) can also be built between steps 2) and 3);

[0060] It can be understood that the process also includes installing the load-bearing disc 29 on the upper load-bearing brick group 27;

[0061] It can be understood that the process further includes welding the Y-shaped anchor 201 on the vehicle frame 10 before casting the outer casting material 23 and before casting the inner casting material 25 .

[0062] According to the first preferred embodiment of the present invention, a refractory material arrangement structure for carrying, processing and transporting multiple steel coils can be provided on the frame of the step-type trolley, and its structural principle is the same as that of the preferred embodiment.

[0063] In addition, according to the preferred embodiment 1 of the present invention, a refractory material arrangement structure that only carries one steel coil can also be obtained. Figure 7 The second preferred embodiment of the present invention is different from the first preferred embodiment in that the expansion sealing ring 22 adopts a single-ring structure. In this way, the lower supporting brick group 24, the castable inner structure 25, the upper load-bearing brick group 27, and the sealing sand layer 28 are constructed within the single ring of the expansion sealing ring 22. The construction structure is the same as that of the first preferred embodiment. In addition, the outer contour of the expansion sealing ring 22 is corresponding to the outer contour of the expansion sealing ring 22, and the castable outer layer 23 and the outer refractory brick layer 26 are constructed outside the ring.

[0064] It is understandable that a fiber blanket 221 may be further provided between the outer peripheral side of the expansion sealing ring 22 and the outer periphery 23 of the castable and the outer refractory brick layer 26 to achieve a better thermal insulation effect.

[0065] In summary, the refractory material arrangement structure of the hood-type step-type trolley for the high-temperature annealing furnace provided by the present invention has the following specific functions of each refractory material: 1) The use of the outer castable 23 can effectively solve the bottom load-bearing rigidity, and no maintenance or replacement is required for a long period of time without accidents; 2) The use of the inner castable structure 25 can effectively solve the gripping force of the bottom load-bearing brick group in the center part, and the loading and bearing effect of the upper steel coil. 3) The function of the lower support brick group 24 is that because it is a die-cast brick, the masonry can ensure parallelism with the bottom of the vehicle, improve the parallelism of the top support brick group masonry above, and then improve the uniform load of the load-bearing steel disc and prevent the disc from deforming for a long time. 4) The outer refractory brick layer 26 is made of mullite bricks, which are resistant to high temperatures. Therefore, it is arranged on the top layer in contact with the furnace flame, and has a low thermal conductivity, energy saving and heat preservation, and can be heat-insulated. In the furnace, the loss of heat energy in the high-temperature annealing furnace is fully reduced. 5) Upper load-bearing brick group 27: This is the direct load-bearing layer. Based on the circulation of the atmosphere within the hood, support is arranged in 12 equal sections for each workstation, with the remaining space serving as an atmosphere circulation channel and heat radiation channel. The overall refractory material layout is rationally designed and has a long service life. The trolley refractory material layout is rationally arranged based on heat conduction and load-bearing components, improving thermal shock resistance and extending the refractory material life. Maintenance costs are also low, and equipment utilization is high. The trolley refractory material casting is made of high-strength castables, and only the top insulation bricks need to be replaced regularly based on damage. Maintenance and replacement are fast, and the equipment can be put into use quickly after repair.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the same manner.

Claims

1. A refractory material arrangement structure (20) for a walking trolley top of a high-temperature annealing furnace, characterized in that: The invention comprises a thermal insulation layer (21), an expansion sealing ring (22), a castable outer layer (23), a lower support brick group (24), a castable inner structure (25), an outer refractory brick layer (26), an upper load-bearing brick group (27), and a sealing sand layer (28), wherein the thermal insulation layer (21) is used for laying on the trolley frame (10), the expansion sealing ring (22) is fixed on the thermal insulation layer (21), the castable outer layer (23) surrounds the outer periphery of the expansion sealing ring (22), the lower support brick group (24) is built inside the expansion sealing ring (22), and the outer periphery of the lower support brick group (24) and the inner periphery of the expansion sealing ring (22) are spaced apart. A preset interval is provided, the castable inner structure (25) includes a main body (251) and a peripheral edge (252) integrally formed on the outer periphery of the bottom end of the main body (251), the main body (251) is formed with a hollow hole matching and accommodating the lower support brick group (24) to cover the lower support brick group (24), the peripheral edge (252) is filled in the lower end of the interval, and a sand groove is formed at the upper end of the interval, the outer refractory brick layer (26) is built on the upper part of the castable periphery (23), the upper load-bearing brick group (27) is correspondingly built on the lower support brick group (24), and the sealing sand layer is filled in the sand groove; The outer periphery of the castable (23) surrounds the outer periphery of the lower end of the expansion sealing ring (22), and the outer refractory brick layer (26) is built on the top surface of the outer periphery of the castable (23) and surrounds the outer periphery of the upper end of the expansion sealing ring (22). The height of the outer refractory brick layer (26) after being built is equivalent to the height of the expansion sealing ring (22); The bottom layer of the outer refractory brick layer (26) extends outward by a preset length to form a side curved sealing convex portion (261) for cooperating with a corresponding side curved sealing concave portion formed on the furnace wall; the top layer forms an upper curved sealing concave portion (262) at one end and an upper curved sealing convex portion (263) at the other end for end face curved sealing cooperation when adjacent trolleys are connected; The upper load-bearing brick group (27) includes lower load-bearing bricks and upper load-bearing bricks, the upper surface of the lower load-bearing bricks is provided with a concave arc groove, and the lower surface of the upper load-bearing bricks is provided with a convex arc groove, and the concave arc groove matches the convex arc groove.

2. The refractory material arrangement structure (20) according to claim 1, characterized in that: Anchors (201) connected to the trolley frame (10) are embedded in the castable outer periphery (23) and the castable inner structure (25).

3. The refractory material arrangement structure (20) according to claim 1, characterized in that: It comprises a load-bearing disc (29), the size of which corresponds to the size of the top surface of the upper load-bearing brick group (27), and is used for laying on the top surface of the castable inner structure (25).

4. A hood-type walking trolley (100) for a high-temperature annealing furnace, comprising a frame (10) and a barrel cover (30), characterized in that: The invention comprises a refractory material arrangement structure (20) as described in any one of claims 1 to 3, wherein the thermal insulation layer (21) of the refractory material arrangement structure (20) is laid on the trolley frame (10), the barrel cover (30) covers the upper load-bearing brick group (27) of the refractory material arrangement structure (20), and the lower end of the barrel cover (30) is inserted into the sand trough.

5. The cover-type step-by-step trolley (100) according to claim 4, characterized in that: A plurality of air pipes (11) are installed on the vehicle frame (10). The air pipes (11) extend out of the expansion seal ring (22) and protrude from the top surface of the upper load-bearing brick group (27) or the top surface of the load-bearing disc (29). The air pipes (11) are used to fill or discharge protective gas into the cylinder cover (30).

6. A method for laying a refractory material arrangement structure on the top of a step-type trolley according to claim 1, characterized in that: The masonry method is as follows: 1) Laying a thermal insulation layer (21) on the trolley frame (10); 2) fixedly installing an expansion seal ring (22) on the thermal insulation layer (21); 3) Laying a lower support brick group (24) inside the expansion sealing ring (22), with a preset gap being set between the outer periphery of the lower support brick group (24) and the inner periphery of the expansion sealing ring (22); 4) providing a castable material to be poured into the expansion sealing ring (22) on the thermal insulation layer (21), so that the castable material flows into the predetermined height within the interval to form the periphery (252), and the castable material flows into the gap of the lower support brick group (24) and covers the lower support brick group (24) to form the main body (251), thereby forming the castable inner structure (25); 5) Laying an upper layer of load-bearing bricks (27) corresponding to the lower layer of supporting bricks (24) on the top surface of the castable inner structure (25); 6) pouring a casting material on the outer periphery of the expansion sealing ring (22) to form the casting material outer periphery (23); 7) Laying an outer refractory brick layer (26) on top of the outer periphery (23) of the castable; 8) Filling the sand trough with a sealing sand layer (28).

7. The masonry method according to claim 6, characterized in that: The lower support brick group (24) is made of first-level high-aluminum mullite bricks and second-level high-aluminum bricks; the castable periphery (23) and the castable inner structure (25) are integrally cast and formed using steel fiber wear-resistant castable; the outer refractory brick layer (26) is made of three layers of first-level high-aluminum mullite bricks.

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