CN218954926U

CN218954926U - Hot air door regulating door spindle air leakage treatment device

Info

Publication number: CN218954926U
Application number: CN202223280934.4U
Authority: CN
Inventors: 李旭峰; 张艺漫; 吴旭良; 李龙强; 王政; 董爱菊
Original assignee: Datang Gongyi Power Generation Co ltd
Current assignee: Datang Gongyi Power Generation Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-05-02
Anticipated expiration: 2032-12-07

Abstract

The utility model relates to a hot air regulating door shaft air leakage treatment device which comprises a hot primary air pipe and a door plate positioned in the hot primary air pipe, wherein one side of the door plate is connected with a driving device, the driving device penetrates through the side wall of the hot primary air pipe to extend outwards, a supporting frame is arranged on one side, close to the hot primary air pipe, of the driving device, a sealing plate is arranged on the side surface of the supporting frame, and a closed space is formed by the sealing plate, the supporting frame and the side wall of the hot primary air pipe. According to the utility model, the door plate is driven to rotate by the driving device to adjust the wind temperature and the wind quantity, and meanwhile, the closed space formed by the supporting frame and the sealing plate can prevent the hot primary wind from carrying coal ash to overflow from the gap between the packing and the door shaft, so that the fly ash overflows to the external environment to cause pollution.

Description

Hot air door regulating door spindle air leakage treatment device

Technical Field

The utility model relates to the technical field of sealing performance reinforcement of a door shaft of a hot primary air regulating door of a boiler, in particular to an air leakage treatment device of the door shaft of the hot air regulating door.

Background

Hot primary air: the main purpose is that the coal dust is blown into the hearth by the air heated by the air preheater, and the part of basic heat of coal dust combustion is increased while the flowing kinetic energy of the coal dust is provided. Fly ash comes mainly from two places: (1) the air door carries pulverized coal in hot primary air, has higher pressure and high temperature, a rotary air preheater is commonly used in modern large and medium power stations, and after the hot primary air passes through a heat exchange surface of the air preheater, a large amount of fly ash is carried in the hot air, and the ash leaks from an air door shaft when passing through an air door of a regulating baffle plate; (2) the damper and other equipment with shaft sealing device are mostly sealed by packing or asbestos rope, which is easy to wear and crack to generate air leakage, and fly ash can leak out along with the packing or asbestos rope.

The boiler heat primary air regulating door is frequently involved in air temperature and air quantity regulation, frequent operation and high-temperature aging property of the graphite woven packing lead to the reduction of packing sealing effect, and hot air often carries fly ash to overflow from a packing chamber, thereby causing environmental pollution. In order to further reduce environmental pollution caused by dust-containing overflow of hot air, we propose a hot air regulating door shaft air leakage treatment device.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides the air leakage treatment device for the door shaft of the hot air regulating door, the door plate is driven to rotate by the driving device to regulate the air temperature and the air quantity, and meanwhile, the airtight space formed by the supporting frame and the sealing plate can prevent the hot primary air from carrying coal ash to overflow from the gap between the packing and the door shaft, and the fly ash overflows to the external environment to cause pollution.

The utility model aims to achieve the aim, and the aim is achieved by the following technical scheme: the utility model provides a hot-blast accent door-hinge air leakage treatment device, includes hot primary air tuber pipe and is located the door plant of hot primary air tuber pipe, drive arrangement is connected to door plant one side, drive arrangement wears out the outside extension of hot primary air tuber pipe lateral wall, drive arrangement sets up braced frame near hot primary air tuber pipe one side, braced frame side sets up the closing plate, braced frame and hot primary air tuber pipe lateral wall form airtight space.

As optimization, the driving device comprises a door shaft fixedly connected with the door plate, the door shaft penetrates out of the hot primary air duct and the supporting frame respectively to be connected with the driving connecting rod, and the door shaft is rotationally connected with the hot primary air duct and the supporting frame respectively.

As optimization, the junction of the door spindle and the hot primary air pipe is provided with a sealing packing.

As optimization, the side face of the supporting frame is provided with a cold primary air pipe.

Compared with the prior art, the utility model has the beneficial effects that:

1. the device drives the door plate to rotate through the driving device for adjusting the wind temperature and the wind quantity, and meanwhile, the airtight space formed by the supporting frame and the sealing plate can prevent the hot primary wind from carrying coal ash to overflow from the gap between the packing and the door shaft, and fly ash overflows to the external environment to cause pollution.

2. The airtight space is formed among the sealing plate, the outer wall of the hot primary air pipe and the supporting frame, so that the leakage of the hot primary air can be prevented, meanwhile, the cold primary air pipe on one side of the airtight space is used for feeding external clean cold air, the wind pressure of the cold primary air is larger than the wind pressure in the hot primary air pipe, and therefore the external clean cold air enters the hot primary air pipe from the airtight frame space through the gap between the packing and the door shaft, the overflow of hot air dust is restrained, and finally, the external environmental pollution and the damage of the door shaft by dust-containing hot air are avoided.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the interior of the hot primary air duct within the support frame of the present utility model.

The reference numbers shown in the drawings: 1. a door panel; 2. a hot primary air duct; 3. sealing packing; 4. a support frame; 5. a drive link; 6. a sealing plate; 7. a cold primary air duct; 8. and a door shaft.

Detailed Description

The utility model is further illustrated below with reference to specific examples, as shown in fig. 1-2, of a device for controlling air leakage of a door shaft of a hot air regulating door.

It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it will be understood that various changes or modifications may be made by those skilled in the art after reading the teachings of the utility model, and such equivalents are intended to fall within the scope of the utility model as defined herein.

The utility model discloses a hot air regulating door shaft air leakage treatment device, which comprises a hot primary air pipe 2 and a door plate 1 positioned in the hot primary air pipe 2, wherein the hot primary air pipe 2 provides heating air, coal dust is blown into a hearth through the air heated by an air preheater, part of basic heat of coal dust combustion is increased while the flowing kinetic energy of the coal dust is provided, one side of the door plate 1 is connected with a driving device, the driving device drives the door plate 1 to rotate, thereby the adjustment of air temperature and air quantity is realized, the driving device can be any driving door plate 1 rotating device, the driving device penetrates out of the side wall of the hot primary air pipe 2 to extend outwards, one side of the driving device, which is close to the hot primary air pipe 2, is provided with a supporting frame 4, the side surface of the supporting frame 4 is provided with a sealing plate 6, the supporting frame 4 and the side wall of the hot primary air pipe 2 form a sealing plate 6 (the shaded part in the figure 1 is U-shaped), the driving device drives the door plate 1 to rotate through the driving device to adjust the air temperature and the air quantity, and meanwhile the sealing plate 6 and the sealing plate 2 and the sealing plate formed by the hot primary air pipe 2 can avoid the overflow of coal dust from a packing to the outside environment from a gap between the hot primary air pipe 8 and a floating environment.

The utility model is further provided with: the driving device comprises a door shaft 8 fixedly connected with the door plate 1, the door shaft 8 penetrates out of the hot primary air pipe 2 and the supporting frame 4 respectively to be connected with the driving connecting rod 5, the door shaft 8 is respectively connected with the hot primary air pipe 2 and the supporting frame 4 in a rotating mode, the supporting frame 4 outside the hot primary air pipe 2 is used for supporting the door shaft 8, one end of the door shaft 8 is fixedly connected with the door plate 1, the other end of the door shaft is sequentially penetrated out of the hot primary air pipe 2 and penetrates through the supporting frame 4 to be fixedly connected with the driving connecting rod 5, the driving connecting rod 5 drives the door shaft 8 to rotate, and the door shaft 8 drives the door plate 1 to rotate, so that air temperature and air quantity adjustment is achieved.

The utility model is further provided with: the junction of door spindle 8 and hot primary air tuber pipe 2 sets up sealed packing 3, prevents that the hot air in the hot primary air tuber pipe 2 from carrying dust leakage, strengthens the device leakproofness.

The utility model is further provided with: the side of the supporting frame 4 is provided with a cold primary air pipe 7, external cold air is added into the closed space, the wind pressure of the cold primary air is larger than that in the hot primary air pipe 2, so that external clean cold air enters the hot primary air pipe 2 from the space of the sealing frame through a gap between the packing and the door shaft 8, the overflow of hot air dust is restrained, and finally, the external environmental pollution and the blowing loss of the door shaft 8 by dust-containing hot air are avoided.

The working principle of the utility model is as follows: through forming airtight space between closing plate 6, hot primary air tuber pipe 2 outer wall and braced frame 4, long-time frequent operation, the high temperature ageing of packing is woven to the graphite in addition, lead to packing sealed effect to descend, can further prevent hot primary air leakage under airtight space's effect, let in cold primary air tuber pipe 7 in airtight space one side simultaneously, send in outside cold air, wind pressure with the help of cold primary air is greater than the wind pressure in the hot primary air tuber pipe 2, the clear cold wind of outside gets into the principle in the hot primary air tuber pipe 2 through packing and door axle 832 clearance in the braced frame space, thereby restrain the excessive of hot-blast dust-laden, finally avoid external environmental pollution and door axle 8 by dust-laden hot-blast blowing loss.

Claims

1. The utility model provides a hot-blast accent door-hinge air leakage administering device, includes hot primary air tuber pipe (2) and is located door plant (1) in hot primary air tuber pipe (2), its characterized in that: the device is characterized in that one side of the door plate (1) is connected with a driving device, the driving device penetrates out of the side wall of the hot primary air pipe (2) to extend outwards, one side, close to the hot primary air pipe (2), of the driving device is provided with a supporting frame (4), the side face of the supporting frame (4) is provided with a sealing plate (6), and the sealing plate (6), the supporting frame (4) and the side wall of the hot primary air pipe (2) form a closed space.

2. The air leakage management device for a hot air door adjusting shaft according to claim 1, wherein: the driving device comprises a door shaft (8) fixedly connected with the door plate (1), the door shaft (8) penetrates out of the hot primary air pipe (2) and the supporting frame (4) respectively to be connected with the driving connecting rod (5), and the door shaft (8) is rotationally connected with the hot primary air pipe (2) and the supporting frame (4) respectively.

3. The air leakage management device for the door shaft of the hot air regulating door as claimed in claim 2, wherein: the joint of the door shaft (8) and the hot primary air pipe (2) is provided with a sealing packing (3).

4. The air leakage management device for a hot air door adjusting shaft according to claim 1, wherein: the side face of the supporting frame (4) is provided with a cold primary air pipe (7).