Magnesia refractory brick structure with heat insulation layer for electric furnace

Abstract

The utility model relates to a magnesia refractory brick structure with a heat insulation layer for an electric furnace, which consists of a first masonry block and a second masonry block, and is technically characterized in that the first masonry block consists of a first Z-shaped brick block and a first heat insulation plate with one end pre-embedded in a lower horizontal section of the first Z-shaped brick block; an upper horizontal clamping groove is formed in the upper horizontal section of the first masonry block; the second masonry block is composed of a second Z-shaped brick and a second heat insulation plate, one end of the second heat insulation plate is embedded in the upper horizontal section of the second Z-shaped brick, and a lower horizontal clamping groove is formed in the lower horizontal section of the second masonry block. The outer ends of the first heat insulation plates are inserted into the lower horizontal clamping grooves, the outer ends of the second heat insulation plates are inserted into the upper horizontal clamping grooves, the pre-buried ends of the first heat insulation plates and the pre-buried ends of the second heat insulation plates are arranged in a staggered and overlapped mode in the vertical direction, and the inserting ends of the first heat insulation plates and the inserting ends of the second heat insulation plates of every two adjacent refractory brick structures are arranged in a staggered and overlapped mode in the vertical direction. The structure obviously improves the heat insulation performance and the connection stability.

Description

Technical Field

[0001] This utility model relates to the field of refractory brick technology, specifically to a magnesia refractory brick structure for electric furnaces with a heat insulation layer. Background Technology

[0002] The magnesia refractory bricks in electric furnaces can be laid in single or multiple layers. Single-layer laying results in greater heat loss, while multi-layer laying involves setting an insulation layer between adjacent layers of refractory bricks to reduce heat loss and provide insulation protection. However, this can easily lead to deformation and detachment under high-temperature conditions.

[0003] CN 222504898 U discloses a composite brick for rotary kiln lining, comprising a primary working layer, a primary insulation layer, a secondary working layer, and a secondary insulation layer. A dovetail groove is provided below the primary working layer, and a dovetail protrusion is provided on the primary insulation layer. A connecting dovetail protrusion is provided on the outer side of the vertical wall of the primary working layer, and a bottom connecting block is provided on the outer side of the vertical wall of the primary insulation layer. The primary working layer is connected to the primary insulation layer via the dovetail protrusion. The secondary working layer is connected to the primary working layer via the upper connecting block, and the secondary working layer is connected to the secondary insulation layer via the dovetail protrusion. This composite brick separates the refractory working layer and insulation layer into molded and fired separately, and then assembled after sintering, aiming to optimize material performance and solve the problem of shrinkage and deformation of the insulation layer after high-temperature sintering of composite bricks. However, the following problems still exist: the primary insulation layer and the secondary insulation layer form an insulation zone. After long-term operation in a high-temperature environment, shrinkage occurs, and gaps are easily generated between the two layers and between the primary insulation layer and the working layer, resulting in reduced insulation performance. Utility Model Content

[0004] The purpose of this invention is to provide a magnesia refractory brick structure for electric furnaces with a heat insulation layer that is structurally reasonable and reliable in use, thereby significantly improving heat insulation performance and connection stability.

[0005] The technical solution of this utility model is:

[0006] A magnesia refractory brick structure for electric furnaces with a heat insulation layer includes a first building block and a second building block. The key technical features are: the first building block consists of a first Z-shaped brick and a first heat insulation plate with one end pre-embedded in the lower horizontal section of the first Z-shaped brick; the upper horizontal section of the first building block has an upper horizontal groove parallel to the first heat insulation plate; the second building block consists of a second Z-shaped brick and a second heat insulation plate with one end pre-embedded in the upper horizontal section of the second Z-shaped brick; the lower horizontal section of the second building block has a lower horizontal groove parallel to the second heat insulation plate; the first Z-shaped brick and the second... The opposite ends of the Z-shaped bricks are joined together. The outer end of the first heat insulation plate is inserted into the lower horizontal slot, and the outer end of the second heat insulation plate is inserted into the upper horizontal slot. The pre-embedded ends of the first and second heat insulation plates are staggered and overlapped in the vertical direction. The insertion ends of the first and second heat insulation plates of two adjacent refractory brick structures are staggered and overlapped in the vertical direction. The opposite ends of the first and second Z-shaped bricks are provided with a first dovetail connection structure. The bottom surfaces of the first Z-shaped brick of a refractory brick structure and the second Z-shaped brick of an adjacent refractory brick structure are connected to the third heat insulation plate.

[0007] In the above-mentioned magnesia refractory brick structure for electric furnaces with heat insulation layer, the pre-embedded ends of the first heat insulation plate and the second heat insulation plate are respectively right-angled and are provided with pre-embedded bolts.

[0008] The aforementioned magnesia refractory brick structure for electric furnaces with a heat insulation layer includes a dovetail-shaped protrusion on the upper horizontal section end face of the first masonry block, a dovetail-shaped groove on the lower horizontal section end face of the first masonry block, a dovetail-shaped groove on the upper horizontal section end face of the second masonry block, and a dovetail-shaped protrusion on the lower horizontal section end face of the second masonry block.

[0009] In the above-mentioned magnesia refractory brick structure for electric furnaces with heat insulation layer, a second dovetail connection structure is provided between the first Z-shaped brick and the third heat insulation plate, and a third dovetail connection structure is provided between the second Z-shaped brick and the third heat insulation plate. The length direction of the dovetail groove of the second dovetail connection structure and the third dovetail connection structure is perpendicular to the length direction of the dovetail groove of the first dovetail connection structure.

[0010] The beneficial effects of this utility model are:

[0011] 1. Since the opposite ends of the first Z-shaped brick and the second Z-shaped brick are joined together, the outer end of the first heat insulation board is inserted into the lower horizontal groove, and the outer end of the second heat insulation board is inserted into the upper horizontal groove. The pre-embedded ends of the first heat insulation board and the second heat insulation board are staggered and overlapped in the vertical direction. The insertion ends of the first heat insulation board and the second heat insulation board of two adjacent refractory brick structures are staggered and overlapped in the vertical direction. Multiple first heat insulation boards and second heat insulation boards form a tortuous first heat insulation zone. When the first heat insulation board and the second heat insulation board shrink under high temperature, their pre-embedded ends have a positioning function, while the insertion ends can shrink along the upper and lower horizontal grooves, which constrains the shrinkage direction and does not affect the joining of the first and second masonry blocks, thus ensuring the structural stability.

[0012] 2. The bottom surfaces of the first Z-shaped brick of a refractory brick structure and the second Z-shaped brick of an adjacent refractory brick structure are connected to a third heat insulation board. The third heat insulation board blocks the joint between the first Z-shaped brick and the second Z-shaped brick, forming a second heat insulation layer, which further improves the heat insulation performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the first masonry block of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the second masonry block of this utility model;

[0017] In the diagram: 1. First masonry block, 2. Second insulation board, 3. Second masonry block, 4. First insulation board, 5. Third insulation board, 6. Embedded bolt, 7. Embedded bolt, 8. Dovetail boss, 9. Dovetail groove, 10. Second dovetail connection structure, 11. Third dovetail connection structure, 12. Dovetail groove, 13. Dovetail boss, 14. Upper horizontal slot, 15. Lower horizontal slot. Detailed Implementation

[0018] The present invention will be described in detail with reference to the accompanying drawings.

[0019] like Figures 1-4 As shown, the magnesia refractory brick structure for electric furnaces with a heat insulation layer includes a first block 1 and a second block 3.

[0020] Wherein: the first masonry block 1 is composed of a first Z-shaped brick and a first heat insulation plate 4 with one end pre-embedded in the lower horizontal section of the first Z-shaped brick; the upper horizontal section of the first masonry block 3 is provided with an upper horizontal groove 14 parallel to the first heat insulation plate 4. The second masonry block 3 is composed of a second Z-shaped brick and a second heat insulation plate 2 with one end pre-embedded in the upper horizontal section of the second Z-shaped brick; the lower horizontal section of the second masonry block 3 is provided with a lower horizontal groove 15 parallel to the second heat insulation plate 2. The opposite ends of the first Z-shaped brick and the second Z-shaped brick are joined together, the outer end of the first heat insulation plate 1 is inserted into the lower horizontal groove 15, and the outer end of the second heat insulation plate 2 is inserted into the upper horizontal groove 14.

[0021] In this embodiment, the pre-embedded ends of the first heat insulation plate 4 and the second heat insulation plate 2 are respectively right-angled and are provided with pre-embedded bolts 6 and 7. The pre-embedded ends of the first heat insulation plate 4 and the second heat insulation plate 2 are arranged in an alternating overlapping manner in the vertical direction, and the insertion ends of the first heat insulation plate 4 and the second heat insulation plate 2 of two adjacent refractory brick structures are arranged in an alternating overlapping manner in the vertical direction.

[0022] The opposite ends of the first Z-shaped brick and the second Z-shaped brick are provided with a first dovetail connection structure. In this embodiment, the first dovetail connection structure includes a dovetail-shaped boss 8 provided on the upper horizontal end face of the first masonry block 1, a dovetail-shaped groove 9 provided on the lower horizontal end face of the first masonry block 1, a dovetail-shaped groove 12 provided on the upper horizontal end face of the second masonry block 3, and a dovetail-shaped boss 13 provided on the lower horizontal end face of the second masonry block 3.

[0023] The bottom surfaces of a first Z-shaped refractory brick and an adjacent second Z-shaped refractory brick are connected to a third heat insulation plate 5. In this embodiment, a second dovetail connection structure 10 is provided between the first Z-shaped brick and the third heat insulation plate 5, and a third dovetail connection structure 11 is provided between the second Z-shaped brick and the third heat insulation plate 5. The length direction of the dovetail groove of the second dovetail connection structure 10 and the third dovetail connection structure 11 is perpendicular to the length direction of the dovetail groove of the first dovetail connection structure.

[0024] When working, see Figure 1 Multiple components of this utility model are spliced ​​together using a first dovetail connection structure, and each first heat insulation board 4 and second heat insulation board 2 forms a tortuous first heat insulation zone in the continuous first masonry block 1 and second masonry block 3; then the second heat insulation board 5 is connected by the second dovetail connection structure 10 and the third dovetail connection structure 11 to realize the second heat insulation zone.

[0025] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A magnesia refractory brick structure for an electric furnace with a heat insulation layer, comprising a first building block and a second building block, characterized in that: The first masonry block consists of a first Z-shaped brick and a first heat insulation plate pre-embedded at one end in the lower horizontal section of the first Z-shaped brick. The upper horizontal section of the first masonry block has an upper horizontal groove parallel to the first heat insulation plate. The second masonry block consists of a second Z-shaped brick and a second heat insulation plate pre-embedded at one end in the upper horizontal section of the second Z-shaped brick. The lower horizontal section of the second masonry block has a lower horizontal groove parallel to the second heat insulation plate. The opposite ends of the first Z-shaped brick and the second Z-shaped brick are joined together. The outer end of the hot plate is inserted into the lower horizontal slot, and the outer end of the second heat insulation plate is inserted into the upper horizontal slot. The pre-embedded ends of the first and second heat insulation plates are staggered and overlapped in the vertical direction. The insertion ends of the first and second heat insulation plates of two adjacent refractory brick structures are staggered and overlapped in the vertical direction. The opposite ends of the first and second Z-shaped bricks are provided with a first dovetail connection structure. The bottom surfaces of the first Z-shaped brick of a refractory brick structure and the second Z-shaped brick of an adjacent refractory brick structure are connected to the third heat insulation plate.

2. The magnesia refractory brick structure with heat insulation layer for electric furnaces according to claim 1, characterized in that: The pre-embedded ends of the first and second heat insulation boards are respectively right-angled and are equipped with pre-embedded bolts.

3. The magnesia refractory brick structure with heat insulation layer for electric furnaces according to claim 1, characterized in that: The first dovetail connection structure includes a dovetail-shaped boss on the upper horizontal end face of the first masonry block, a dovetail-shaped groove on the lower horizontal end face of the first masonry block, a dovetail-shaped groove on the upper horizontal end face of the second masonry block, and a dovetail-shaped boss on the lower horizontal end face of the second masonry block.

4. The magnesia refractory brick structure for electric furnaces with a heat insulation layer according to claim 1, characterized in that: A second dovetail connection structure is provided between the first Z-shaped brick and the third heat insulation board, and a third dovetail connection structure is provided between the second Z-shaped brick and the third heat insulation board. The length direction of the dovetail groove of the second and third dovetail connection structures is perpendicular to the length direction of the dovetail groove of the first dovetail connection structure.

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