A new type of wind box structure for sintering machine

Abstract

The utility model provides a novel bellows structure for sintering machine, including outer shell and inner shell, and the cavity is formed between outer shell and inner shell, and the inside of inner shell has the air chamber that is convenient for hot air to pass, and the air chamber is installed with the fairlead that is connected in the position of inner shell end portion in the air inlet, and the end of fairlead extends to the center of air chamber in the inclination, the utility model discloses a double -layer shell structure is used, and the cavity is formed between outer shell and inner shell and fills the heat insulation layer, and the heat insulation effect of bellows is improved significantly, and the surface temperature of outer shell is reduced effectively, and the operator is avoided to touch scald by mistake, the fairlead is set up at the air inlet, and the hot air is guided to pass from the middle part of air chamber, and the hot flow is avoided to directly wash the sidewall of bellows, and the local thermal stress is reduced, and the structural durability is improved, and at the same time, the spiral baffle is set up in the cavity, and the spiral channel is formed to import the cooling airflow, and the heat dissipation capacity of bellows is further enhanced, and the long -term stable operation of equipment is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of sintering bellows technology, specifically relating to a novel bellows structure for sintering machines. Background Technology

[0002] Sintering machines are commonly used equipment in the metallurgical industry. They are mainly used to sinter iron ore powder, fuel, and other additives in a certain proportion to produce sintered ore suitable for blast furnace smelting. The bellows, as a key component of the sintering machine system, primarily functions to extract or regulate airflow, controlling the direction and intensity of airflow during sintering, thereby affecting sintering efficiency and product quality.

[0003] Existing sintering machine bellows typically employ a single-layer metal structure, directly positioned below or to the side of the sintering trolley. During actual operation, the continuous action of high-temperature gases easily causes the overall temperature of the bellows to rise, especially the outer wall. This not only leads to structural fatigue and shortened lifespan but also poses significant safety hazards, such as burns to operators accidentally touching the outer wall. Furthermore, some bellows lack adequate insulation or safety protection measures in their structural design, failing to effectively suppress heat conduction and increasing the heat load on the working environment. Additionally, the air inlet design of existing bellows is generally quite simple; hot airflow often directly impacts one side of the inner wall upon entry, causing abnormal temperature increases on that side. This exacerbates localized thermal stress concentration and structural aging, ultimately affecting the bellows's service life. Utility Model Content

[0004] This utility model provides a novel bellows structure for a sintering machine, which solves the problems mentioned in the background art, such as the existing bellows being a single-layer metal structure, resulting in excessively high outer wall temperatures and burns to operators, as well as the inability of the bellows to effectively conduct heat outward during operation and the concentration of thermal stress in localized areas inside the bellows caused by hot airflow.

[0005] The technical solution adopted by this utility model is: a novel air box structure for a sintering machine, including an outer shell and an inner shell, a cavity is formed between the outer shell and the inner shell, the interior of the inner shell has an air cavity that facilitates the passage of hot air, and a guide plate is installed at the air inlet of the air cavity and connected to the end of the inner shell, the end of the guide plate extends obliquely toward the center of the air cavity.

[0006] A partition is installed in the cavity formed between the outer shell and the inner shell. The partition is spirally distributed in the cavity and divides the cavity into a first spiral channel and a second spiral channel. A heat insulation layer is installed in the first spiral channel. One end of the heat insulation layer is in close contact with the inner wall of the outer shell and the other end is in close contact with the outer wall of the inner shell. An air inlet and an air outlet are provided on the side wall of the outer shell. The air inlet and the air outlet are respectively connected to the second spiral channel and are respectively located at both ends of the outer shell.

[0007] An inner lining layer, which is made of castable refractory material, is installed on the inner wall of the inner shell by anchors; at one end of the inner shell, there is an inwardly bent folding plate, and the outer surface of the inner lining layer is flush with the end of the folding plate.

[0008] The anchor is a V-shaped anchor nail made of Q235 steel, and the number of anchor nails is not less than 16 per square meter.

[0009] The insulation layer is made of ceramic fiber cotton or aluminum silicate cotton.

[0010] The outer shell and the inner shell are respectively fixed with connecting flanges at both ends.

[0011] The partition is fixed to the outer wall of the inner shell, and the height of the partition is lower than the width of the cavity formed by the outer shell and the inner shell.

[0012] The outer shell is provided with ribs arranged in a crisscross pattern.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention employs a double-shell structure, forming a cavity between the outer and inner shells and filling it with a heat insulation layer. This significantly improves the heat insulation effect of the air box, effectively reducing the surface temperature of the outer shell and preventing operators from being burned by accidental contact. A guide plate is installed at the air inlet to guide hot air through the middle of the air cavity, preventing the hot air from directly impacting the side walls of the air box, reducing local thermal stress, and improving structural durability. At the same time, a spiral baffle is installed in the cavity to form a spiral channel to introduce cooling airflow, further enhancing the heat dissipation capacity of the air box and ensuring long-term stable operation of the equipment. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a structural diagram showing the distribution of the anchors of this utility model on the surface of the inner shell;

[0018] Figure 4 This is a partial cross-sectional view of the connection between the inner lining and the inner shell of this utility model.

[0019] in:

[0020] 1. Outer shell; 2. Inner shell; 3. Insulation layer; 4. Rib plate; 5. Liner layer; 6. Partition plate; 7. First spiral channel; 8. Second spiral channel; 9. Guide plate; 10. Air cavity; 11. Air outlet; 12. Connecting flange; 13. Air inlet; 14. Anchor; 15. Folding plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As shown in the figure, a novel air box structure for a sintering machine includes an outer shell 1 and an inner shell 2. A cavity is formed between the outer shell 1 and the inner shell 2. The inner shell 2 has an air cavity 10 that facilitates the passage of hot air. A guide plate 9 is installed at the air inlet of the air cavity 10 and at the end of the inner shell 2. The end of the guide plate 9 extends obliquely towards the center of the air cavity 10. That is, the guide plate 9 is located at the inner edge of the air inlet of the air box and is fixed to the inner shell 2 by bolts. In actual operation, after the hot air enters the air box from the air inlet, it can pass through the middle area of ​​the air cavity 10 under the action of the guide plate 9. This can minimize the erosion of the inner wall of the air box and thus help extend the overall service life of the air box.

[0023] A partition 6 is installed within the cavity formed between the outer shell 1 and the inner shell 2. The partition 6 is spirally distributed within the cavity, dividing it into a first spiral channel 7 and a second spiral channel 8. In this example, there are two partitions 6, arranged spirally within the cavity formed by the inner shell 2 and the outer shell 1, thus forming the first spiral channel 7 and the second spiral channel 8. A heat insulation layer 3 is installed within the first spiral channel 7. Specifically, the heat insulation layer 3 is ceramic fiber cotton or aluminum silicate cotton. One end of the heat insulation layer 3 is tightly attached to the inner wall of the outer shell 1, and the other end is tightly attached to the outer wall of the inner shell 2. The purpose of the heat insulation layer 3 is, firstly, to provide support for the inner shell 2 and the outer shell 1. To prevent deformation of both components, the insulation layer 3 also provides insulation, reducing the efficiency of heat transfer to the outer shell 1. An air inlet 13 and an air outlet 11 are provided on the side wall of the outer shell 1. The air inlet 13 and the air outlet 11 are respectively connected to the second spiral channel 8, and the air inlet 13 and the air outlet 11 are respectively located at both ends of the outer shell 1. The purpose of the air inlet 13 is to connect to an external inert gas through a pipe to further improve the insulation effect. In addition, the air inlet 13 can also be connected to an external air source. Cold air can enter the second spiral channel 8 from the air inlet 13 and finally exit from the air outlet 11 to exhaust hot air and achieve a cooling effect.

[0024] An inner lining layer 5 is installed on the inner wall of the inner shell 2 via anchors 14. The inner lining layer 5 is made of castable refractory. At one end of the inner shell 2, there is an inwardly bent folding plate 15. The outer surface of the inner lining layer 5 is flush with the end of the folding plate 15. Specifically, the castable refractory is a high-strength ceramic wear-resistant material with good pressure resistance, wear resistance, and high temperature resistance. The function of the folding plate 15 is to limit the boundary of the inner shell 2 during the casting process of the inner lining layer 5, forming an effective lateral baffle structure, thereby preventing the castable refractory from overflowing during flow and ensuring that the inner lining layer 5 remains flat and of uniform thickness at the end area, improving its edge forming quality. In addition, the folding plate 15 can also enhance the constraint effect of the inner lining layer 5 at the end, preventing edge detachment or cracking during use, and helping to improve the overall structural stability and service life of the lining.

[0025] The anchor 14 is a V-shaped anchor nail made of Q235 steel, and the number of anchor nails is not less than 16 per square meter.

[0026] The outer shell 1 and the inner shell 2 are respectively fixed with connecting flanges 12 at both ends, and the bellows can be installed in a designated position through the connecting flanges 12.

[0027] The partition 6 is fixed to the outer wall of the inner shell 2, and the height of the partition 6 is lower than the width of the cavity formed by the outer shell 1 and the inner shell 2. This is to avoid the end of the partition 6 contacting the outer shell 1 and causing heat conduction.

[0028] The outer shell 1 is provided with ribs 4 arranged in a cross pattern to enhance the overall structural strength of the bellows and prevent deformation.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel bellows structure for a sintering machine, characterized in that, It includes an outer shell and an inner shell, with a cavity formed between the outer shell and the inner shell. The interior of the inner shell has an air cavity that facilitates the passage of hot air. An air inlet of the air cavity is connected to the end of the inner shell and a guide plate is installed thereon. The end of the guide plate extends obliquely toward the center of the air cavity. A partition is installed in the cavity formed between the outer shell and the inner shell. The partition is spirally distributed in the cavity and divides the cavity into a first spiral channel and a second spiral channel. A heat insulation layer is installed in the first spiral channel. One end of the heat insulation layer is in close contact with the inner wall of the outer shell and the other end is in close contact with the outer wall of the inner shell. An air inlet and an air outlet are provided on the side wall of the outer shell. The air inlet and the air outlet are respectively connected to the second spiral channel and are respectively located at both ends of the outer shell.

2. The novel bellows structure for a sintering machine according to claim 1, characterized in that, An inner lining layer, made of castable refractory material, is installed on the inner wall of the inner shell via anchors; at one end of the inner shell, there is an inwardly bent folding plate, and the outer surface of the inner lining layer is flush with the end of the folding plate.

3. A novel bellows structure for a sintering machine according to claim 1, characterized in that, The anchors are V-shaped anchors made of Q235 steel, and the number of anchors is no less than 16 per square meter.

4. A novel bellows structure for a sintering machine according to claim 1, characterized in that, The insulation layer is made of ceramic fiber cotton or aluminum silicate cotton.

5. A novel bellows structure for a sintering machine according to claim 1, characterized in that, Connecting flanges are fixed at both ends of the outer shell and the inner shell, respectively.

6. A novel bellows structure for a sintering machine according to claim 1, characterized in that, The partition is fixed to the outer wall of the inner shell, and the height of the partition is lower than the width of the cavity formed by the outer shell and the inner shell.

7. A novel bellows structure for a sintering machine according to claim 1, characterized in that, The outer shell is provided with ribs arranged in a cross pattern.

Images