Wear-resistant long-life sintering machine air bellow flap valve device

Abstract

The utility model discloses a kind of wear-resistant long-life sintering machine air bellow flap valve devices, including valve body (1), the valve body (1) is divided into side plate (2) and windward plate (3), the windward plate (3) is set between the side plate (2) of both sides, the windward plate (3) is equipped with square grid (4), the opening of square grid (4) is towards the air inlet of valve body (1);By setting square grid (4) on windward plate (3), while due to square grid (4) is inclined to air inlet direction and is welded, sintered ore particles and dust contained in flue gas in production operation will run to square, and fill up entire square, when subsequent flue gas enters into valve body (1), particle in subsequent flue gas will impact on material in square grid (4), and will not be directly washed to windward plate (3), effectively protect the windward plate (3) of valve body (1), reduce the damage caused by washing of windward plate (3).

Description

Technical Field

[0001] This utility model belongs to the field of sintering machine technology. Specifically, this utility model relates to a wear-resistant and long-life sintering machine air box flap valve device. Background Technology

[0002] The sintering production process is based on airflow, and the air volume plays a decisive role in sintering capacity. Air leakage in the sintering machine affects the permeability of the sintering process, which not only restricts the output of sintered ore but also increases the energy consumption of the sintering process. The sintering machine's air box flap valve is an important piece of equipment for regulating airflow in sintering production. It operates under harsh and severe conditions. During years of operation, it is subjected to high-temperature (200-400℃) and high-negative-pressure flue gas (containing a large amount of sintered ore particles and dust) and high-speed scouring (wind speed up to 25 m / s). The valve body of the air box flap valve wears through holes, resulting in serious air leakage. Each maintenance requires welding repair and replacement of the air box flap valve, which seriously restricts sintering production and consumes a lot of manpower, material resources and financial resources.

[0003] A specification published on February 22, 2017, with application number 201620986594.2, discloses a labor-saving and anti-clogging sintering machine air box flap valve structure, including an air box flap valve, a sintering machine air box at the upper part of the air box flap valve, a reducing pipe, connecting elbow, connecting expansion joint, connecting straight pipe and flue at the lower part of the air box flap valve. The air box flap valve includes a valve body, a flap shaft and a flap. The characteristic feature is that bearing seats are installed on both sides of the upper part of the valve body. The flap shaft is inserted into the round tube at the upper part of the flap plate through the bearing seats. A rubber asbestos seal is provided between the inner side of the bearing seats and the flap shaft. A solid lubricated bearing is fixed to the bearing seats with bolts. A crank arm is provided at one end of the flap shaft. The crank arm is connected to the crank arm of an electric actuator through a connecting rod. A counterweight crank arm and a counterweight rod with a counterweight block are provided at the other end of the flap shaft. This invention completely solves the problem of negative pressure control in the ignition bellows, avoids compaction and crusting, and improves the production capacity of the sintering machine and reduces the cost of sintered ore.

[0004] In the existing technology, the original sintering machine wind box flap valve is connected to the pipeline at a 75° angle. The valve body is welded from ordinary carbon steel plate. Under the high temperature, negative pressure, and high-speed scouring of flue gas containing a large amount of sintered ore particles and dust, the windward side of the valve body quickly wears through the hole. The bearings on both sides of the main shaft are also easily damaged by the high temperature and dust. Utility Model Content

[0005] The present invention aims to provide a wear-resistant and long-lasting sintering machine bellows flap valve device with a long service life and resistance to damage.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a wear-resistant and long-life sintering machine air box flap valve device, including a valve body, the valve body being divided into a side plate and a windward plate, the windward plate being disposed between the two side plates, the windward plate being provided with a grid plate, the opening of the grid plate facing the air inlet of the valve body.

[0007] The grid is divided into vertical and horizontal plates that intersect each other perpendicularly, and multiple vertical and horizontal plates are arranged in an array.

[0008] The grid panels are evenly distributed on the windward plate, and the grid panels completely cover the windward plate.

[0009] The end of the horizontal plate is inclined toward the air inlet of the valve body.

[0010] The side plate is provided with a bearing seat, the bearing seat is provided with a rotating shaft, the part of the rotating shaft located inside the valve body is provided with a valve plate, and the part of the rotating shaft located outside the valve body is provided with a connecting rod.

[0011] A packing seat is provided between the valve body and the bearing housing.

[0012] Flanges are welded to both ends of the valve body.

[0013] The technical effect of this utility model is as follows: by setting a grid plate on the windward plate, the sintered ore particles and dust contained in the flue gas during production will run into the grid and fill the entire grid. The material coming down from the air inlet will directly contact and collide with the sintered ore particles in the grid, forming a material-to-material collision, thereby effectively protecting the valve body windward plate and reducing the damage caused by the windward plate being washed away. Attached Figure Description

[0014] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the structure of a wear-resistant and long-life sintering machine air box flap valve device according to the present invention; Figure 2 for Figure 1 A schematic diagram of a square grid plate for a wear-resistant and long-life sintering machine air box flap valve device; Figure 3 for Figure 1 A schematic diagram of the packing seat of a wear-resistant and long-life sintering machine air box flap valve device.

[0015] The following are marked in the diagram: 1. Valve body; 2. Side plate; 3. Windward plate; 4. Grid plate; 5. Bearing housing; 6. Shaft; 7. Valve plate; 8. Connecting rod; 9. Packing seat; 10. Flange. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution, and to facilitate its implementation.

[0017] Please see Figure 1-3 A wear-resistant and long-life sintering machine air box flap valve device includes a valve body 1, which is divided into a side plate 2 and a windward plate 3. The windward plate 3 is located between the two side plates 2. The windward plate 3 is provided with a grid plate 4, the opening of which faces the air inlet of the valve body 1. By setting the grid plate 4 on the windward plate 3, the sintered ore particles and dust contained in the flue gas during production will run into the grid and fill the entire grid. The material coming down from the air inlet afterward will directly contact and collide with the sintered ore particles in the grid, instead of directly impacting the windward plate 3, forming a material feeding mechanism, thereby effectively protecting the valve body 1 and the windward plate 3. To reduce damage caused by scouring of the windward plate 3, both the grid plate 4 and the valve body 1 are made of manganese steel. The valve body 1 is made of 20mm thick 16Mn manganese steel plate. The valve body 1 is rectangular, with dimensions of 1200mm×650mm and a height of 1200mm. The windward side of the valve body 1 is designed with a material feeding grid structure. The grid size is 200mm×100mm and it is made of 50mm wide and 16mm thick flat steel. The flat steel material is 16Mn. The grid plate 4 is welded to the vertical valve box at a 75° angle, with the opening facing the air inlet to ensure that the grid plate 4 is parallel to the air inlet direction.

[0018] The grid board 4 is divided into vertical and horizontal boards that intersect each other perpendicularly, and multiple vertical and horizontal boards are arranged in an array; the horizontal and vertical boards are interlaced to form the grid board 4.

[0019] The grid panels 4 are evenly distributed on the windward plate 3, and the grid panels 4 completely cover the windward plate 3; ensuring that the entire windward plate 3 is protected by the grid panels 4.

[0020] The end of the horizontal plate is inclined toward the air inlet of the valve body 1, so that the grid plate 4 is as open as possible toward the wind direction, making it convenient to store materials.

[0021] The side plate 2 is provided with a bearing seat 5, and the bearing seat 5 is provided with a rotating shaft 6. The part of the rotating shaft 6 located inside the valve body 1 is provided with a valve plate 7, and the part of the rotating shaft 6 located outside the valve body 1 is provided with a connecting rod 8. The valve plate 7 is rotated by the connecting rod 8. The rotating shaft 6 is made of forged round steel with a diameter of Φ80mm, and the flap is welded to the rotating shaft 6 with a thickness of 20mm of 16Mn manganese steel plate.

[0022] A packing seat 9 is provided between the valve body 1 and the bearing seat 5; the rotating shaft 6 extends 60mm to the outside of the valve body 1 on both sides to cooperate with the bearing seat 5, so that the bearing seat 5 is completely separated from the valve body 1. The part of the rotating shaft 6 that contacts the valve box is filled with high temperature resistant ceramic fiber packing and sealed with a gland to form a packing seat 99, which has good sealing performance and avoids high temperature damage to the bearing and air leakage from the valve box.

[0023] Flanges 10 are welded to both ends of the valve body 1 for easy connection to the air box duct.

[0024] Working principle: By evenly laying square grid plates 4 on the windward plate 3 of valve body 1, when flue gas is discharged, the sintered ore particles and dust contained in the flue gas will run into the square grid plates 4, filling the square grid plates 4. At the same time, because the square grid plates 4 are welded at an incline towards the air inlet, the square grid plates 4 are parallel to the airflow direction of the air inlet, which facilitates the storage of materials. When subsequent flue gas enters the valve body 1, the particles in the subsequent flue gas will collide with the materials in the square grid plates 4, and will not directly wash against the windward plate 3, effectively protecting the windward plate 3 of valve body 1.

[0025] The technical effect of this utility model is as follows: by setting a grid plate 4 on the windward plate 3, the sintered ore particles and dust contained in the flue gas during production will run into the grid and fill the entire grid. The material coming down from the air inlet will directly contact and collide with the sintered ore particles in the grid, forming a material-to-material collision, thereby effectively protecting the windward plate 3 of the valve body 1 and reducing the damage caused by the windward plate 3 being washed away.

[0026] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A wear-resistant and long-life sintering machine air box flap valve device, comprising a valve body (1), characterized in that: The valve body (1) is divided into a side plate (2) and a windward plate (3). The windward plate (3) is located between the side plates (2) on both sides. The windward plate (3) is provided with a grid plate (4), and the opening of the grid plate (4) faces the air inlet of the valve body (1).

2. The wear-resistant and long-life sintering machine air box flap valve device according to claim 1, characterized in that: The grid plate (4) is divided into vertical plates and horizontal plates that intersect each other perpendicularly, and multiple vertical plates and horizontal plates are arranged in an array.

3. The wear-resistant and long-life sintering machine air box flap valve device according to claim 1 or 2, characterized in that: The grid plate (4) is evenly distributed on the windward plate (3), and the grid plate (4) completely covers the windward plate (3).

4. The wear-resistant and long-life sintering machine air box flap valve device according to claim 2, characterized in that: The end of the horizontal plate is inclined toward the air inlet of the valve body (1).

5. The wear-resistant and long-life sintering machine air box flap valve device according to claim 1, characterized in that: The side plate (2) is provided with a bearing seat (5), the bearing seat (5) is provided with a rotating shaft (6), the part of the rotating shaft (6) located inside the valve body (1) is provided with a valve plate (7), and the part of the rotating shaft (6) located outside the valve body (1) is provided with a connecting rod (8).

6. The wear-resistant and long-life sintering machine air box flap valve device according to claim 5, characterized in that: A packing seat (9) is provided between the valve body (1) and the bearing seat (5).

7. The wear-resistant and long-life sintering machine air box flap valve device according to claim 1, characterized in that: Flanges (10) are welded to both ends of the valve body (1).

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