Air door adjusting device of pulverized coal burner

Abstract

A communicating hole is formed in the side wall of the top of an air pipe in a penetrating mode, a rotary knob is rotationally connected into the communicating hole, a two-way screw is rotationally connected into the air pipe, and the end, located in the air pipe, of the rotary knob is fixedly connected to the top end of the two-way screw. The two ends of the two-way screw rod are both in threaded connection with a follow-up rod, and the edges of the two ends, away from each other, of each follow-up rod are both rotationally connected with a follow-up sealing plate. The four follow-up sealing plates can be pressed and clamped along with movement of the follow-up rod, the stress middle positions of the four follow-up sealing plates can move and expand outwards, so that the distance between the follow-up rod and the inner ring wall of the air pipe is increased, flowing airflow flows out of the distance, and therefore the flow rate under the same power can be adjusted by adjusting the size of the distance. And the blast equipment does not need to be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of air volume regulating devices, in particular to an air door regulating device for a pulverized coal burner. Background Art

[0002] The pulverized coal burner is a combustion device that uses pulverized coal as the main medium. The pulverized coal is fed into the burner and then ignited and burned. It is also one of the most common burners nowadays. In order to ensure the transportation of pulverized coal and the injection of flame, a blasting device is required. The pulverized coal is sent into the combustion zone by blowing a high-pressure airflow. The injection of flame is also formed by blowing a high-pressure airflow.

[0003] Currently, the air blowing equipment is basically of straight-through type, and the high-pressure airflow blown out directly enters the corresponding area through the pipeline. This means that the air volume can only be adjusted by controlling the blower each time. This method is not suitable for fine-tuning and affects the accuracy of air flow, which will directly affect the transportation of coal powder and the injection of flames. For this reason, a damper adjustment device for a coal powder burner is proposed. Utility Model Content

[0004] The technical solution adopted by the utility model to solve the technical problem is: a damper adjustment device for a pulverized coal burner, comprising an air duct, a connecting hole is opened through the top side wall of the air duct, a knob is rotatably connected in the connecting hole, a bidirectional screw is rotatably connected in the air duct, one end of the knob located in the air duct is fixedly connected to the top of the bidirectional screw, both ends of the bidirectional screw are threadedly connected to a follower rod, each of the two end edges of the follower rod that are far away from each other are rotatably connected to a follower sealing plate, and one adjacent end of every two follower sealing plates is rotatably connected to a rotating shaft.

[0005] As a preferred technical solution of the utility model, the bottom side wall of the air duct is fixedly connected with a bottom column, the bottom end of the bidirectional screw of the air duct is located in the bottom column, the four follow-up sealing plates are in a diamond structure through a rotating shaft, and a groove is provided on the side wall inside the air duct and opposite to the bottom column.

[0006] As a preferred technical solution of the utility model, a floating ruler is telescopically and movably inserted at the top of the air duct and near the connecting hole, an indicator plate is fixedly connected to the side wall of the top of the air duct and near the floating ruler, and one end of the floating ruler located in the air duct is rotatably connected to a rotating rod.

[0007] As a preferred technical solution of the utility model, the bottom of the rotating rod is rotatably connected to an extension column, and the extension column is rotatably connected to the corresponding follow-up sealing plate through its end away from the rotating rod. A scale is set on the side wall of the floating ruler away from the knob, and the top of the indicator plate corresponds to the scale.

[0008] As a preferred technical solution of the utility model, one end of the air duct is detachably connected to a sealing plate, the sealing plate is an annular structure, the inner wall of the sealing plate is evenly fixedly connected to a cross beam, the middle of the bottom side wall of the cross beam is rotatably connected to a movable baffle, and a gap is left between the movable baffle and the cross beam and the inner wall of the sealing plate.

[0009] The utility model has the following advantages: the two-way screw is driven to rotate by a knob, thereby driving the two follower rods to move synchronously toward the middle position, and as the follower rod moves, the four follower sealing plates will be pressed and clamped, and the middle position of the four follower sealing plates under force will move outward and expand, thereby increasing the distance between the follower rod and the inner wall of the air duct, and the flowing air flows out from this distance. Therefore, by adjusting the size of the distance, the flow rate under the same power can be adjusted, and there is no need to adjust the air blowing equipment itself. In addition, it is a threaded connection relationship, and the size can be fine-tuned, which increases the convenience and practicality of the application. The size can be monitored by setting up a floating scale, so that corresponding adjustments can be made in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of a preferred embodiment of the utility model;

[0011] Figure 2 It is a partial planar structural schematic diagram of a preferred embodiment of the utility model;

[0012] Figure 3 It is a preferred embodiment of the utility model Figure 3 Enlarged structural diagram at A in the middle.

[0013] Explanation of the reference numerals: 1. air duct; 2. indicator plate; 3. connecting hole; 4. floating scale; 5. knob; 6. sealing plate; 7. crossbeam; 8. movable baffle; 9. bidirectional screw; 10. follower rod; 11. follower sealing plate; 12. rotating shaft; 13. bottom column; 14. extension column; 15. rotating rod. DETAILED DESCRIPTION

[0014] The utility model will be further described below in conjunction with the accompanying drawings.

[0015] Please refer to Figure 1-3The utility model discloses a damper adjustment device for a pulverized coal burner, comprising an air duct 1, a connecting hole 3 is formed through the top side wall of the air duct 1, a knob 5 is rotatably connected in the connecting hole 3, a bidirectional screw 9 is rotatably connected in the air duct 1, one end of the knob 5 located in the air duct 1 is fixedly connected to the top of the bidirectional screw 9, both ends of the bidirectional screw 9 are threadedly connected with a follower rod 10, and both ends of each follower rod 10 are rotatably connected with a follower sealing plate 11, and each two adjacent ends of the follower sealing plates 11 are rotatably connected with a rotating shaft 12, a bottom side wall of the air duct 1 is fixedly connected with a bottom column 13, the bottom end of the bidirectional screw 9 of the air duct 1 is located in the bottom column 13, the four follower sealing plates 11 are in a diamond structure through the rotating shaft 12, and a groove is formed in the side wall of the air duct 1 and opposite to the bottom column 13.

[0016] The technical effect of this solution is as follows: rotating the knob 5 can drive the bidirectional screw 9 to rotate synchronously, and through this threaded connection, the two follower rods 10 are driven toward the middle, which will generate a pressing force on the four follower sealing plates 11. Because the four follower rods 10 are a diamond-shaped structure under normal conditions, the middle position will fold and extend outward when under pressure, so as to adjust the distance between the follower rod 10 and the inner wall of the air duct 1, thereby adjusting and controlling the flow rate while ensuring that the blowing equipment remains unchanged, thereby increasing the flexibility and practicality of the equipment application.

[0017] A floating ruler 4 is telescopically and movably inserted at the top of the air duct 1 and near the connecting hole 3, an indicator plate 2 is fixedly connected to the side wall of the top of the air duct 1 and near the floating ruler 4, one end of the floating ruler 4 located in the air duct 1 is rotatably connected to a rotating rod 15, and the bottom of the rotating rod 15 is rotatably connected to an extension column 14, and the extension column 14 is rotatably connected to the corresponding follow-up sealing plate 11 through its end away from the rotating rod 15, a scale is set on the side wall of the floating ruler 4 away from the knob 5, and the top of the indicator plate 2 corresponds to the scale, one end of the air duct 1 is detachably connected to a sealing plate 6, the sealing plate 6 is an annular structure, and the inner wall of the sealing plate 6 is evenly and fixedly connected with a cross beam 7, and a movable baffle 8 is rotatably connected to the middle of the bottom side wall of the cross beam 7, and a gap is left between the movable baffle 8 and the cross beam 7 and the inner circle wall of the sealing plate 6.

[0018] The technical effect of this solution is as follows: in order to further adjust the flow rate, a sealing plate 6 is connected to the air outlet of the air duct 1, and the airflow can be diverted by the established crossbeam 7. When the airflow pressure is large, the movable baffle 8 will be lifted up so as not to affect the circulation of the airflow. The angle amplitude of the movable baffle 8 will be adaptively adjusted according to the size of the airflow to achieve the diversion of the airflow and avoid the impact force of the airflow. A gap is left to ensure the circulation of the minimum airflow and ensure normal use.

[0019] Specifically, when the utility model is used, the two-way screw 9 is driven to rotate synchronously by rotating the knob 5, and the follower rod 10 is driven to move via the threaded connection, so that the upright follower sealing plate 11 is adjusted to a horizontal state. By adjusting the distance between the inner wall of the air duct 1 and the follower rod 10 in this way, the airflow flows from this distance. Therefore, it is only necessary to adjust the size of the distance to adjust the flow rate. Because the middle of the two follower rods 10 moves horizontally during the adjustment process, it will not cause turbulence to the circulating airflow, ensuring that the airflow is smoothly ejected from the air duct 1. Because the floating scale 4 and the rotating rod 15, as well as the rotating rod 15 and the follower sealing plate 11 are all in a rotationally connected relationship, the movement and descent of the follower sealing plate 11 will also drive the floating scale 4 to descend synchronously. The size of the distance can be clearly known through the indication of the indicator plate 2, and the required distance can be accurately adjusted according to this method. Whether to install the sealing plate 6 depends on actual needs. Installing the sealing plate 6 can perform certain flow limiting and diversion, so that the airflow flows out evenly and disperses to adapt to different operating environments.

[0020] The above are only preferred implementations of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

[0021] Other parts of the present invention not described in detail belong to the prior art and will not be described in detail here.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A damper regulating device for a pulverized coal burner, comprising an air duct (1), characterized in that: A connecting hole (3) is formed through the top side wall of the air duct (1), a knob (5) is rotatably connected in the connecting hole (3), a bidirectional screw (9) is rotatably connected in the air duct (1), one end of the knob (5) located in the air duct (1) is fixedly connected to the top of the bidirectional screw (9), both ends of the bidirectional screw (9) are threadedly connected to a follower rod (10), both ends of each follower rod (10) are rotatably connected to a follower sealing plate (11), and the adjacent ends of each two follower sealing plates (11) are rotatably connected to a rotating shaft (12).

2. The air door regulating device for a pulverized coal burner according to claim 1, characterized in that: The bottom side wall of the air duct (1) is fixedly connected to a bottom column (13); the bottom end of the bidirectional screw (9) of the air duct (1) is located in the bottom column (13); the four follow-up sealing plates (11) are arranged in a diamond structure through a rotating shaft (12); and a groove is provided in the side wall of the air duct (1) opposite to the bottom column (13).

3. The air door regulating device for a pulverized coal burner according to claim 1, characterized in that: A floating ruler (4) is telescopically and movably inserted at the top of the air duct (1) and near the connecting hole (3); an indicator plate (2) is fixedly connected to the side wall of the top of the air duct (1) and near the floating ruler (4); and one end of the floating ruler (4) located inside the air duct (1) is rotatably connected to a rotating rod (15).

4. The air door regulating device for a pulverized coal burner according to claim 3, characterized in that: The bottom of the rotating rod (15) is rotatably connected to an extension column (14), and the extension column (14) is rotatably connected to the corresponding follower sealing plate (11) through its end away from the rotating rod (15). A scale is provided on the side wall of the floating ruler (4) away from the knob (5), and the top of the indicator plate (2) corresponds to the scale.

5. The air door regulating device for a pulverized coal burner according to claim 1, characterized in that: One end of the air duct (1) is detachably connected to a sealing plate (6), the sealing plate (6) is an annular structure, the inner wall of the sealing plate (6) is evenly fixedly connected to a cross beam (7), the middle of the bottom side wall of the cross beam (7) is rotatably connected to a movable baffle (8), and a gap is left between the movable baffle (8) and the cross beam (7) and the inner wall of the sealing plate (6).

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