An arch bridge masonry structure of a lime kiln

Abstract

The utility model relates to lime kiln design structure technical field, especially lime kiln's arch bridge masonry structure, including the furnace body arch foot brick of symmetrical setting in the both sides of main body structure, set up below the arch bridge layer and the upper arch layer on the furnace body arch foot brick of both sides, set up the screed brick layer above the upper arch layer, and set up the turning brick layer above the screed brick layer, the utility model discloses the conventional arch bridge brick in the arch bridge layer is designed as the mortise and tenon chain structure to the interface place between the arch bridge brick is designed to insert and connect and bite to improve the impact resistance of arch bridge layer, and it is convenient to carry out masonry construction simultaneously. In addition, the acoustic emission sensor is embedded in the both ends of the arch bridge layer, and the crack propagation is monitored in real time, so that the detection is improved to improve the arch bridge life.

Description

Technical Field

[0001] This utility model relates to the technical field of lime kiln design and structure, and in particular to an arch bridge masonry structure for a lime kiln. Background Technology

[0002] The arch bridge structure of a sleeve lime kiln is located at the upper and lower burners, connecting the burners and the inner sleeve. It uses specially shaped bricks to form a unique double-arch structure to support the weight of the material above the bridge and its own structure. This area not only withstands high-temperature impacts and rapid heating and cooling, but also the physical effects of material falling and tumbling. Therefore, the operating environment of the bridge section is particularly harsh, making it prone to damage. Currently, in most domestic sleeve lime kilns, the arch bridge structure is the first to change shape and eventually collapse after a period of use, becoming a thorny problem for lime kiln companies and seriously affecting their production efficiency and profitability. In particular, the arch bridge layer directly bears the combustion impact and is prone to breakage at the joints. Utility Model Content

[0003] The purpose of this invention is to provide an arch bridge masonry structure for lime kilns, which solves the problem that conventional lime kiln arch bridge layers are prone to breakage at the joints due to combustion impact.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model provides an arch bridge masonry structure for a lime kiln, including furnace body arch foot bricks symmetrically arranged on both sides of the main structure, a lower arch bridge layer and an upper arch layer arranged on the furnace body arch foot bricks on both sides, a leveling brick layer arranged above the upper arch layer, and a flip-out brick layer arranged above the leveling brick layer.

[0006] The upper arched layer is located above the lower arched bridge layer; thermal insulation cotton is respectively provided in the gap between the lower arched bridge layer and the upper arched layer, and in the gap between the upper arched layer and the leveling brick layer;

[0007] High-temperature resistant acoustic emission sensors are obliquely arranged at the ends of the lower arch bridge layer and the upper arch layer;

[0008] The lower arch bridge layer and the upper arch bridge bricks of the upper arch layer are constructed by interlocking.

[0009] In this embodiment, both the lower arch bridge layer and the upper arch layer are constructed using the first arch bridge bricks.

[0010] Furthermore in this embodiment, a limiting arc groove is formed on one side of the first arch bridge brick, and an arc-shaped insertion rib is integrally provided on the other side. The arc-shaped insertion rib can be adapted to be inserted into the limiting arc groove of the adjacent first arch bridge brick.

[0011] Furthermore in this embodiment, both the lower arch bridge layer and the upper arch layer are constructed using second arch bridge bricks.

[0012] Furthermore in this embodiment, one side of the second arch bridge brick is provided with a dovetail groove, and the other side is integrally provided with a dovetail insertion rib, which can be adapted to be inserted into the dovetail groove of the adjacent second arch bridge brick.

[0013] Furthermore in this embodiment, the masonry material for the flip-over brick layer is high-purity mullite brick, and the masonry material used for the lower arch bridge layer, the upper arch layer, and the leveling brick layer is magnesium aluminum spinel brick.

[0014] Furthermore in this embodiment, uneven expansion joints are formed between the lower arch bridge layer and the upper arch layer, and between the upper arch layer and the leveling brick layer, and each uneven expansion joint is filled with high-temperature glass wool.

[0015] Furthermore, in this embodiment, the high-temperature resistant acoustic emission sensor is a SiC high-temperature pressure sensor.

[0016] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0017] In this invention, the conventional arch bridge bricks in the arch bridge layer are designed with a mortise and tenon interlocking structure, thereby improving the impact resistance of the arch bridge layer and facilitating masonry construction. Furthermore, acoustic emission sensors are pre-embedded at both ends of the arch bridge layer to monitor crack propagation in real time, thus improving detection capabilities and extending the lifespan of the arch bridge. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the arch bridge masonry structure of the lime kiln of this utility model.

[0020] Figure 2 This is a schematic diagram of the first arch bridge brick structure in the arch bridge masonry structure of the lime kiln of this utility model.

[0021] Figure 3 for Figure 2 A schematic diagram of the brickwork assembly for the first arch bridge;

[0022] Figure 4 This is a schematic diagram of the second arch bridge brick structure of the arch bridge masonry structure of the lime kiln of this utility model.

[0023] Figure 5 for Figure 4 A schematic diagram of the brickwork assembly for the second arch bridge.

[0024] Explanation of reference numerals in the attached drawings: 1. Furnace body arch foot brick; 2. Lower arch bridge layer; 3. Upper arch layer; 4. Leveling brick layer; 5. Turning-out brick layer; 6. Insulation cotton; 7. First arch bridge brick; 71. Limiting arc groove; 72. Arc-shaped insertion rib; 8. Second arch bridge brick; 81. Dovetail groove; 82. Dovetail insertion rib; 9. High-temperature resistant acoustic emission sensor. Detailed Implementation

[0025] This embodiment discloses an arch bridge masonry structure for a lime kiln, including furnace body arch foot bricks 1 symmetrically built on both sides of the main structure, a lower arch bridge layer 2 and an upper arch layer 3 built on the furnace body arch foot bricks 1 on both sides, a leveling brick layer 4 built on the upper arch layer 3, and a flip-out brick layer 5 built on the leveling brick layer 4.

[0026] The upper arched layer 3 is located above the lower arched bridge layer 2; thermal insulation cotton 6 is filled in the gap between the lower arched bridge layer 2 and the upper arched layer 3, and in the gap between the upper arched layer 3 and the leveling brick layer 4; specifically, uneven expansion joints are formed between the lower arched bridge layer 2 and the upper arched layer 3, and between the upper arched layer 3 and the leveling brick layer 4, and high-temperature glass wool is filled in the uneven expansion joints.

[0027] In this embodiment, the masonry material of the flip-out brick layer 5 is high-purity mullite brick, and the masonry material used for the lower arch bridge layer 2, the upper arch layer 3, and the leveling brick layer 4 is magnesium aluminum spinel brick.

[0028] Specifically, in order to ensure the stability of the construction of the lower arch bridge layer 2 and the upper arch layer 3, the lower arch bridge layer 2 and the upper arch bridge bricks of the upper arch layer 3 are constructed by interlocking.

[0029] refer to Figure 2 and Figure 3 In one implementation, both the lower arch bridge layer 2 and the upper arch layer 3 are constructed using first arch bridge bricks 7. One side of the first arch bridge brick 7 has a limiting arc-shaped groove 71, and the other side has an integrally formed arc-shaped insertion rib 72. The arc-shaped insertion rib 72 can be fitted into the limiting arc-shaped groove 71 of an adjacent first arch bridge brick 7. Specifically, the cross-section of the first arch bridge brick 7 is an inverted trapezoidal structure to facilitate splicing and construction with adjacent first arch bridge bricks 7. The arc-shaped insertion rib 72 is inserted into the limiting arc-shaped groove 71, which is a cylindrical groove with a 300° arc surface.

[0030] As another implementation method, see reference Figure 4 and Figure 5Both the lower arch bridge layer 2 and the upper arch layer 3 are constructed using second arch bridge bricks 8. One side of the second arch bridge brick 8 is provided with a dovetail groove 81, and the other side is integrally provided with a dovetail insert rib 82. The dovetail insert rib 82 can be adapted to be inserted into the dovetail groove 81 of the adjacent second arch bridge brick 8.

[0031] In this embodiment, high-temperature resistant acoustic emission sensors 9 are obliquely arranged at the ends of the lower arch bridge layer 2 and the upper arch layer 3; the high-temperature resistant acoustic emission sensors 9 are SiC high-temperature pressure sensors or high-temperature SiC-MEMS sensors; the wiring of the high-temperature resistant acoustic emission sensors 9 is pre-embedded with cables through high-temperature resistant ceramic tubes and heat insulation materials.

[0032] The working temperature of the end of the lower arch bridge layer 2 and the end of the upper arch layer 3 is 800-950℃; the high-temperature resistant acoustic emission sensor 9 can be used for real-time early warning of crack initiation; the high-temperature resistant acoustic emission sensor 9 can identify continuous emission signals (friction energy release) with characteristic frequencies of 150-300kHz; and can also capture sudden high-energy signals (crack instability) of 50-100kHz.

[0033] The high-temperature adhesive used in the masonry is phosphate-bonded mortar with the following mix proportions: 85% high-alumina fine powder (≤0.1mm) and 15% aluminum dihydrogen phosphate solution.

[0034] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An arch bridge masonry structure for a lime kiln, characterized in that: It includes furnace body arch foot bricks (1) symmetrically arranged on both sides of the main structure, a lower arch bridge layer (2) and an upper arch layer (3) arranged on the furnace body arch foot bricks (1) on both sides, a leveling brick layer (4) arranged above the upper arch layer (3), and a flip-out brick layer (5) arranged above the leveling brick layer (4). The upper arched layer (3) is located above the lower arched bridge layer (2); thermal insulation cotton (6) is provided in the gap between the lower arched bridge layer (2) and the upper arched layer (3), and in the gap between the upper arched layer (3) and the leveling brick layer (4). High-temperature resistant acoustic emission sensors (9) are obliquely arranged at the ends of the lower arch bridge layer (2) and the upper arch layer (3). The lower arch bridge layer (2) and the upper arch layer (3) are constructed by interlocking the upper arch bridge bricks.

2. The arch bridge masonry structure for a lime kiln according to claim 1, characterized in that: Both the lower arch bridge layer (2) and the upper arch layer (3) are constructed using the first arch bridge bricks (7).

3. The arch bridge masonry structure for a lime kiln according to claim 2, characterized in that: One side of the first arch bridge brick (7) is provided with a limiting arc groove (71), and the other side is integrally provided with an arc-shaped insertion rib (72). The arc-shaped insertion rib (72) can be adapted to be inserted into the limiting arc groove (71) of the adjacent first arch bridge brick (7).

4. The arch bridge masonry structure for a lime kiln according to claim 1, characterized in that: Both the lower arch bridge layer (2) and the upper arch layer (3) are constructed using the second arch bridge bricks (8).

5. The arch bridge masonry structure for a lime kiln according to claim 4, characterized in that: One side of the second arch bridge brick (8) is provided with a dovetail groove (81), and the other side is integrally provided with a dovetail insertion rib (82). The dovetail insertion rib (82) can be adapted to be inserted into the dovetail groove (81) of the adjacent second arch bridge brick (8).

6. The arch bridge masonry structure for a lime kiln according to claim 1, characterized in that: The masonry material of the flip-out brick layer (5) is high-purity mullite brick, and the masonry material used for the lower arch bridge layer (2), upper arch layer (3), and leveling brick layer (4) is magnesium aluminum spinel brick.

7. The arch bridge masonry structure for a lime kiln according to claim 1, characterized in that: Uneven expansion joints are formed between the lower arch bridge layer (2) and the upper arch layer (3), and between the upper arch layer (3) and the leveling brick layer (4), and the uneven expansion joints are filled with high-temperature glass wool.

8. The arch bridge masonry structure for a lime kiln according to claim 1, characterized in that: The high-temperature resistant acoustic emission sensor (9) is a SiC high-temperature pressure sensor.

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