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. A reinforcing frame is fixedly installed on the outer side of the rear end of the air door frame, an adaptive gear ring is rotationally connected to the middle of the interior of the reinforcing frame, a spiral groove is formed in the rear end of the adaptive gear ring, the middle of the reinforcing frame is designed in a penetrating mode, 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, the four baffles rotate synchronously through meshing transmission of the bevel gears and the gear ring pieces, the opening degree of the air door is accurately adjusted, and then the air volume in the coal mill is controlled. The problems that an existing air door adjusting baffle of the coal mill is controlled through an air cylinder, the damage rate is high, and the maintenance cost is high are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal mill equipment, and more specifically, it relates to a reinforced damper structure for a coal mill. Background Technology

[0002] The boiler pulverizing system includes main equipment such as a coal bunker, coal feeder, and coal mill, as well as auxiliary equipment such as mill dampers and mill outlet coal valves. Coal in the coal bunker is fed into the coal mill by the coal feeder. After the coal lumps are crushed and ground into fine coal powder, it is sent into the furnace through the mill dampers under the action of primary air. During the operation of the coal mill, the dampers are important components for controlling the air volume inside the coal mill, and their performance directly affects the working efficiency and stability of the coal mill.

[0003] Understanding the current application of coal mill damper structures:

[0004] 1. The existing coal mill damper adjustment baffle is controlled by a cylinder, which has a high failure rate, high maintenance cost, and affects the normal operation of the coal mill, thus reducing production efficiency;

[0005] 2. The existing damper structure lacks effective auxiliary reinforcement measures when installed on the coal mill, which affects its stability and service life. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a reinforced damper structure for coal mills, which solves the problems of existing coal mill damper regulating baffles being controlled by cylinders, resulting in high damage rates and maintenance costs, and the lack of effective auxiliary reinforcement measures when the existing damper structure is installed on the coal mill.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A reinforced damper structure for a coal mill includes a damper frame; a reinforcing frame is fixedly installed on the outer rear end of the damper frame; an adaptive gear ring is rotatably connected to the middle of the inner side of the reinforcing frame; a spiral groove is provided at the rear end of the adaptive gear ring; the middle of the reinforcing frame is a through-type design; and three sliding grooves are provided on the rear end face of the reinforcing frame. A slider is slidably connected in each of the three sliding grooves; an arc-shaped groove is provided at the front end of each slider; the arc-shaped grooves of the three sliders all mesh with the threaded groove of the adaptive gear ring; an mounting plate is fixedly installed on the outer side of each slider; and an adjusting gear rod is rotatably connected to the lower inner side of the reinforcing frame, meshing with the lower front end of the adaptive gear ring.

[0009] According to one embodiment of the present invention, four auxiliary frames are provided on the circumferential surface of the damper frame, and toothed ring members are rotatably connected inside the four auxiliary frames, with the toothed ring members located on the outer side of the damper frame.

[0010] According to one embodiment of the present invention, each of the auxiliary frames is rotatably connected to a drive shaft at its internal position, and a bevel gear is provided at the middle position of each drive shaft, with the bevel gear of each drive shaft meshing with the rear end position of the gear ring.

[0011] According to one embodiment of the present invention, a motor is fixedly installed at the top of the auxiliary frame above the damper frame, and the motor shaft is fixedly connected to the outer side of the transmission shaft inside the auxiliary frame.

[0012] According to one embodiment of the present invention, a baffle with a fan-shaped structure is provided on the inner side of each of the transmission shafts. The four baffles are located inside the reinforcing frame and together form a circular structure when the four baffles are in a parallel state.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The motor shaft drives the transmission shaft connected to it to rotate. Through the meshing transmission of bevel gear and gear ring, the four baffles rotate synchronously, realizing precise adjustment of the damper opening and thus controlling the air volume in the coal mill. When the four baffles are in a parallel state and form a circular structure, they can effectively block the internal passage of the damper frame. This adjustment method is more stable and reliable, avoiding the problem of high damage rate when using cylinder control, and improving the operating efficiency of the coal mill.

[0015] 2. The reinforcing frame fixedly installed at the outer end of the damper frame, and the adjustment mechanism that drives the adapting gear ring and slider by rotating the adjusting gear rod, play an auxiliary reinforcing role. If it is necessary to adjust the position of the slider on the reinforcing frame, rotating the adjusting gear rod drives the adapting gear ring to rotate. The spiral groove of the adapting gear ring meshes with the arc groove of the slider, so that the three sliders slide in the groove of the reinforcing frame, thereby adjusting the position of the mounting plate. This structural design can firmly install the reinforcing frame on the outside of the coal mill according to actual needs, enhance the overall stability of the damper, and extend the service life of the damper.

[0016] 3. The position of the mounting plate can be adjusted by adjusting the position of the slider. During actual installation, the position of the mounting plate can be flexibly adjusted according to specific circumstances to meet different installation requirements, thus improving the versatility of the damper structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the reinforced damper structure for a coal mill, viewed from the left.

[0018] Figure 2 This is a side view of the reinforced damper structure for a coal mill according to this utility model.

[0019] Figure 3This is a schematic diagram of the overall rear view of the damper frame of this utility model.

[0020] Figure 4 This is a schematic diagram of the overall structure of the reinforcement frame of this utility model, viewed from the side after partial cross-section.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1. Damper frame; 101. Auxiliary frame; 102. Drive shaft; 103. Gear ring; 104. Motor; 105. Baffle; 2. Reinforcing frame; 201. Adaptive gear ring; 202. Adjusting gear rod; 203. Slider; 204. Mounting plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The use of terms such as "a," "an," or "the" in this utility model patent application specification and claims does not indicate a quantity limitation, but rather indicates the presence of at least one. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0026] Example:

[0027] As attached Figure 1 To be continued Figure 4 As shown:

[0028] This utility model provides a reinforced damper structure for a coal mill, including a damper frame 1; a reinforcing frame 2 is fixedly installed on the outer rear end of the damper frame 1; an adapting toothed ring 201 is rotatably connected to the middle of the inner part of the reinforcing frame 2; a spiral groove is provided at the rear end of the adapting toothed ring 201; the middle part of the reinforcing frame 2 is a through-type design; and three sliding grooves are opened on the rear end face of the reinforcing frame 2. A slider 203 is slidably connected in each of the three sliding grooves of the reinforcing frame 2; an arc-shaped groove is provided at the front end of each slider 203; and the arc-shaped grooves of the three sliders 203 all mesh with the threaded groove of the adapting toothed ring 201. An installation plate 204 is fixedly installed on the outer side. An adjusting gear rod 202 is rotatably connected to the lower part of the inner side of the reinforcing frame 2. The adjusting gear rod 202 meshes with the lower front end of the toothed ring 201. Four auxiliary frames 101 are provided on the circumference of the damper frame 1. A toothed ring 103 is rotatably connected inside the four auxiliary frames 101. The toothed ring 103 is located on the outer side of the damper frame 1. A drive shaft 102 is rotatably connected inside the auxiliary frame 101. A bevel gear is provided in the middle of each drive shaft 102, and the bevel gear of each drive shaft 102 meshes with the rear end of the toothed ring 103.

[0029] Among them, a motor 104 is fixedly installed at the top of the auxiliary frame 101 above the damper frame 1. The rotating shaft of the motor 104 is fixedly connected to the outer side of the transmission shaft 102 inside the auxiliary frame 101. A fan-shaped baffle 105 is provided on the inner side of each transmission shaft 102. The four baffles 105 are located inside the reinforcing frame 2. When the four baffles 105 are in a parallel state, they together form a circular structure.

[0030] When using:

[0031] The rear end of the damper frame 1 is fixed to the required installation position of the coal mill;

[0032] When the damper opening needs to be adjusted, the motor 104 fixedly installed on the top of the auxiliary frame 101 above the damper frame 1 is started. The rotating shaft of the motor 104 drives the transmission shaft 102 connected to it to rotate. Since each transmission shaft 102 has a bevel gear in the middle position and the bevel gear meshes with the rear end of the gear ring 103, the rotation of the transmission shaft 102 will drive the gear ring 103 to rotate through the bevel gear. Since the gear ring 103 is rotatably connected inside each of the four auxiliary frames 101 and the bevel gear of each transmission shaft 102 meshes with the gear ring 103, the rotation of the gear ring 103 will drive the other three transmission shafts 102 to rotate synchronously. This causes the four baffles 105 to rotate and adjust inside the damper frame 1, thereby adjusting the damper opening and controlling the air volume in the coal mill. When the four baffles 105 are in a parallel state and form a circular structure, they will block the internal passage of the damper frame 1, avoiding the situation where most damper adjustment baffles are controlled by cylinders, which has a high damage rate.

[0033] A reinforcing frame 2 is fixedly installed at the outer end of the damper frame 1. If it is necessary to adjust the position of the slider 203 on the reinforcing frame 2, the adjusting gear rod 202 is rotated to drive the adapting gear ring 201 to rotate. The spiral groove of the adapting gear ring 201 meshes with the arc groove of the slider 203, and the three sliders 203 will slide in the groove of the reinforcing frame 2. A mounting plate 204 is fixedly installed on the outer side of each slider 203. The position of the mounting plate 204 can be adjusted by adjusting the position of the slider 203 according to actual needs to meet the requirements of installing the reinforcing frame 2 on the outside of the coal mill, so as to play an auxiliary reinforcement role.

Claims

1. A reinforced damper structure for a coal mill, characterized in that: The device includes a damper frame (1); a reinforcing frame (2) is fixedly installed on the outer rear end of the damper frame (1); an adapting gear ring (201) is rotatably connected to the middle of the inner part of the reinforcing frame (2); a spiral groove is provided at the rear end of the adapting gear ring (201); the middle part of the reinforcing frame (2) is designed to be through; and three sliding grooves are provided on the rear end face of the reinforcing frame (2); a slider (203) is slidably connected in each of the three sliding grooves of the reinforcing frame (2); an arc groove is provided at the front end of each slider (203); the arc grooves of the three sliders (203) are all engaged with the threaded groove of the adapting gear ring (201); an mounting plate (204) is fixedly installed on the outer side of each slider (203); an adjusting gear rod (202) is rotatably connected to the lower inner part of the reinforcing frame (2); and the adjusting gear rod (202) is engaged with the lower front end of the adapting gear ring (201).

2. The reinforced damper structure for a coal mill as described in claim 1, characterized in that: Four auxiliary frames (101) are provided on the circumferential surface of the damper frame (1), and toothed rings (103) are rotatably connected inside the four auxiliary frames (101). The toothed rings (103) are located on the outer side of the damper frame (1).

3. The reinforced damper structure for a coal mill as described in claim 2, characterized in that: Each of the auxiliary frames (101) is rotatably connected to a drive shaft (102) at its internal position. Each drive shaft (102) is provided with a bevel gear at its middle position, and the bevel gear of each drive shaft (102) meshes with the rear end position of the gear ring (103).

4. The reinforced damper structure for a coal mill as described in claim 1, characterized in that: A motor (104) is fixedly installed at the top of the auxiliary frame (101) above the damper frame (1), and the rotating shaft of the motor (104) is fixedly connected to the outer side of the transmission shaft (102) inside the auxiliary frame (101).

5. The reinforced damper structure for a coal mill as described in claim 4, characterized in that: Each of the drive shafts (102) has a fan-shaped baffle (105) on its inner side. The four baffles (105) are located inside the reinforcing frame (2). When the four baffles (105) are in a parallel state, they together form a circular structure.

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