CN-224208182-U - Reinforced air door structure for coal mill

Abstract

The utility model provides a reinforced air door structure for a coal mill, which relates to the technical field of coal mill equipment and comprises an air door frame, wherein a reinforcing frame is fixedly arranged at the outer side position of the rear end of the air door frame, an adaptive toothed ring is rotationally connected to the middle position of the inner part of the reinforcing frame, a spiral groove is formed in the rear end position of the adaptive toothed ring, the middle position of the reinforcing frame is in a penetrating design, and three sliding grooves are formed in the rear end face of the reinforcing frame. The motor rotating shaft drives the transmission shaft connected with the motor rotating shaft to rotate, and the four baffles synchronously rotate through the meshing transmission of the bevel gear and the toothed ring piece, so that the accurate adjustment of the opening degree of the air door is realized, and the air quantity in the coal mill is controlled. The problems of high damage rate and high maintenance cost of the traditional air door regulating baffle of the coal mill are solved by adopting air cylinder control.

Inventors

• ZHANG DONGQI
• ZHANG WENFEN
• HAO ZHUANFANG
• ZHAO ZHONGWEI
• YAO WENLIANG
• JIANG LITING
• MAO QIANG
• Niu Kuaihui
• SUN BAIYANG
• MAI HA
• SHI RUIXIANG
• WANG YING

Assignees

• 中铝宁夏能源集团有限公司六盘山热电厂

Dates

Publication Date

20260508

Application Date

20250422

Claims (5)

1. 1. A reinforced air door structure for a coal mill is characterized by comprising an air door frame (1), wherein a reinforcing frame (2) is fixedly arranged at the outer side position of the rear end of the air door frame (1), an adaptive toothed ring (201) is rotatably connected at the inner middle position of the reinforcing frame (2), a spiral groove is formed in the rear end position of the adaptive toothed ring (201), three sliding grooves are formed in the middle position of the reinforcing frame (2) in a penetrating mode, one sliding block (203) is slidably connected in the three sliding grooves of the reinforcing frame (2), an arc-shaped groove is formed in the front end position of each sliding block (203), an installation plate (204) is fixedly arranged at the outer side position of each sliding block (203), an adjusting gear rod (202) is rotatably connected at the inner lower position of the reinforcing frame (2), and the adjusting gear rod (202) is meshed with the lower front end position of the adaptive toothed ring (201).
2. 2. The reinforced air door structure for the coal mill according to claim 1, wherein four auxiliary frames (101) are arranged on the peripheral surface of the air door frame (1), toothed ring pieces (103) are rotatably connected inside the four auxiliary frames (101), and the toothed ring pieces (103) are located on the outer side of the air door frame (1).
3. 3. A reinforced damper structure for coal pulverizer as set forth in claim 2, wherein each of said auxiliary frames (101) has a drive shaft (102) rotatably connected to the inner portion thereof, a bevel gear is provided in the middle of each drive shaft (102), and the bevel gear of each drive shaft (102) engages with the rear end portion of the toothed ring member (103).
4. 4. The reinforced air door structure for the coal mill of claim 1, wherein a motor (104) is fixedly arranged at the top of an auxiliary frame (101) arranged above the air door frame (1), and a rotating shaft of the motor (104) is fixedly connected with the outer side of a transmission shaft (102) in the auxiliary frame (101).
5. 5. The reinforced damper structure for coal pulverizer as set forth in claim 4, wherein a baffle (105) of fan-shaped design is provided at an inner side position of each of said drive shafts (102), and four baffles (105) are located at inner positions of the reinforcing frame (2), and when the four baffles (105) are in a parallel state, a circular structure is formed together.

Description

Reinforced air door structure for coal mill Technical Field The utility model belongs to the technical field of coal mill equipment, and particularly relates to a reinforced air door structure for a coal mill. Background The boiler pulverizing system comprises main equipment such as a coal bin, a coal feeder, a coal mill and auxiliary equipment such as a mill air door, a mill outlet coal valve and the like, wherein coal in the coal bin is fed into the coal mill through the coal feeder, coal blocks are pulverized and become coal dust after being pulverized, the coal dust is fed into a hearth through the mill air door under the action of primary air, and in the operation process of the coal mill, the air door is an important part for controlling the air quantity in the coal mill, and the performance of the air door directly influences the working efficiency and the stability of the coal mill. For the current coal mill damper structure application: 1. The air door adjusting baffle of the existing coal mill is controlled by an air cylinder, so that the damage rate is high, the maintenance cost is high, the normal operation of the coal mill is influenced, and the production efficiency is reduced; 2. the existing damper structure lacks effective auxiliary reinforcement measures when being installed on a coal mill, and stability and service life are affected. Disclosure of utility model In order to solve the technical problems, the utility model provides a reinforced air door structure for a coal mill, which aims to solve the problems that the air door adjusting baffle of the existing coal mill is controlled by an air cylinder, the damage rate is high, the maintenance cost is high and the existing air door structure lacks effective auxiliary reinforcing measures when being installed on the coal mill. The utility model adopts the technical scheme that: A reinforced air door structure for a coal mill comprises an air door frame, wherein a reinforcing frame is fixedly arranged at the outer side of the rear end of the air door frame, an adaptive toothed ring is rotatably connected to the inner middle position of the reinforcing frame, spiral grooves are formed in the rear end position of the adaptive toothed ring, the middle position of the reinforcing frame is of a penetrating design, three sliding grooves are formed in the rear end face of the reinforcing frame, a sliding block is slidably connected in each of the three sliding grooves of the reinforcing frame, an arc-shaped groove is formed in the front end position of each sliding block, the arc-shaped groove positions of the three sliding blocks are meshed with the thread groove positions of the adaptive toothed ring, a mounting plate is fixedly arranged at the outer side position of each sliding block, an adjusting gear rod is rotatably connected to the inner lower position of the reinforcing frame, and the adjusting gear rod is meshed with the lower position of the front end of the adaptive toothed ring. According to one embodiment of the utility model, four auxiliary frames are arranged on the peripheral surface of the air door frame, and toothed ring pieces are rotatably connected inside the four auxiliary frames and are positioned on the outer side of the air door frame. According to one embodiment of the utility model, one transmission shaft is rotatably connected to the inner position of each auxiliary frame, a bevel gear is arranged in the middle of each transmission shaft, and the bevel gear position of each transmission shaft is meshed with the rear end position of the toothed ring member. According to one embodiment of the utility model, a motor is fixedly arranged at the top of the auxiliary frame arranged above the wind portal frame, and a rotating shaft of the motor is fixedly connected with the outer side of a transmission shaft in the auxiliary frame. According to one embodiment of the utility model, the inner side of each transmission shaft is provided with a baffle plate with a fan-shaped structure, the four baffle plates are positioned in the inner position of the reinforcing frame, and when the four baffle plates are in a parallel state, the four baffle plates form a circular structure together. Compared with the prior art, the utility model has the following beneficial effects: 1. The motor rotating shaft drives the transmission shaft connected with the motor rotating shaft to rotate, and the transmission shaft is meshed with the toothed ring piece through the bevel gear, so that the four baffles synchronously rotate, accurate adjustment of the opening degree of the air door is realized, the air quantity in the coal mill is controlled, when the four baffles are in a parallel state to jointly form a circular structure, the air door frame internal channel can be effectively shielded, the adjusting mode is more stable and reliable, the problem that the damage rate is higher when the air cylinder is adopted for control is avoided, and the operati