CN111140864B

CN111140864B - Rake type flue damper

Info

Publication number: CN111140864B
Application number: CN201911379149.4A
Authority: CN
Inventors: 贾伯林; 李武林; 季献华; 姚志全; 李宽; 徐俊秀; 王辰; 严峰; 张彬彬; 徐涛; 王亚
Original assignee: Jiangsu Jingyuan Environmental Protection Co ltd
Current assignee: Jiangsu Jingyuan Environmental Protection Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2022-08-23
Anticipated expiration: 2039-12-27
Also published as: CN111140864A

Abstract

The application discloses a rake type flue baffle door, which comprises a flue, a baffle and a driving device, wherein the baffle is arranged in the flue, and the driving device drives the baffle to open or close the flue; the baffle edge is provided with the notch, and the flue inner wall corresponds the notch and sets up in the sprue with notch complex. Therefore, the edge of the baffle is provided with a plurality of notches to form the rake body, and meanwhile, the inner wall of the flue behind the downstream of the baffle is provided with a blocking block close to the baffle, the height and the width of the blocking block are approximate to those of the notches, when the baffle is closed, the notches and the blocking block of the baffle form a sealing surface, and a flue gas channel is cut off. Cigarette ash has certain mobility under the dry condition, when the baffle was opened, because the notch of harrow formula body can become the mediation passageway of cigarette ash, the atress of consequently baffle can be less than the atress of whole piece baffle body a lot of, and then the phenomenon of moment can not appear, protects the retaining device, extension baffle and drive arrangement's life.

Description

Rake type flue damper

Technical Field

The invention relates to the field of flues, in particular to a rake type flue damper.

Background

The flue of the existing large-scale coal-fired power plant, especially the flue of the flue gas desulfurization system of the power plant, is provided with a flue gas baffle door in a matching way so as to adjust the air volume and the air pressure.

However, the flue is long and large in diameter, errors caused by temperature-induced deformation or machining accuracy cannot be avoided, a large amount of coal ash can be accumulated immediately in front of and behind the flapper door after the flue is closed for a period of time in actual use, and when the flue flapper door needs to be reopened, the accumulated coal ash can greatly hinder the opening of the flapper door.

Due to the over-torque, the flapper door cannot be opened, and even an actuator motor of the flapper door is burnt out due to the over-torque.

Disclosure of Invention

It is an object of the present invention to provide a rake flue damper that addresses one or more of the above-mentioned problems of the prior art.

According to one aspect of the invention, a rake flue damper is provided, which comprises a flue, a damper and a driving device, wherein the damper is arranged in the flue, and the driving device drives the damper to open or close the flue; the edge of the baffle is provided with a notch, and the inner wall of the flue is arranged on the blocking block matched with the notch corresponding to the notch.

The edge of the baffle is provided with a plurality of notches to form the harrow type body, and meanwhile, the inner wall of the flue at the back of the downstream of the baffle is provided with a blocking block close to the baffle in height and width similar to the notches.

When the baffle plate is closed, the notch of the baffle plate and the blocking block form a sealing surface to cut off the flue gas channel. The soot has a certain flowability in dry condition. When the baffle is opened, because the notch of harrow formula body can become the mediation passageway of cigarette ash, consequently the atress of baffle can be less than the atress of whole piece baffle body a lot, and then the phenomenon of moment can not appear crossing, protection retaining device, extension baffle and drive arrangement's life.

In some embodiments: a notch is arranged at one side edge of the baffle.

Therefore, the baffle door can be easily opened, the phenomenon of over-moment can not occur, and the baffle device is protected.

In some embodiments: the edges of the two sides of the back of the baffle are provided with notches.

Therefore, the baffle door can be opened more easily, the phenomenon of over-moment can not occur, and the baffle device is protected.

In some embodiments: the quantity of notch is a plurality of, and evenly sets up along the baffle edge.

In some embodiments: the notch is a wave-shaped groove which is continuously arranged along the edge of the baffle.

In some embodiments: the edge of the notch is provided with a slope.

Therefore, the soot accumulated on the edge of the baffle plate can pass through the notch more easily, and the resistance of the soot to the baffle plate is further reduced.

In some embodiments: the baffle is rotatably arranged in the flue through a rotating shaft, the rotating shaft is arranged along the diameter direction of the baffle, and the driving device drives the rotating shaft to rotate.

In some embodiments: the inner wall of the flue is provided with a limiting block matched with the baffle. Therefore, when the baffle plate is closed to the position of the limiting block, the flue is just completely closed.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a rake flue damper door of the present invention;

FIG. 2 is a schematic structural view of a second embodiment of a rake flue damper door of the present invention;

fig. 3 is a schematic view of the rake flue damper ramp of the present invention.

Description of reference numerals:

1. a flue;

2. a baffle plate;

3. a drive device;

4. a notch;

5. blocking;

6. a slope;

7. a rotating shaft;

8. and a limiting block.

Detailed Description

The present invention will be described in further detail with reference to the following description of the drawings.

Wherein, the upstream direction is towards the direction that the baffle opened, and the opening is the opening flue.

The downstream direction is towards the direction that the baffle closed, and the closure is closed flue.

As shown in fig. 1, the rake flue damper comprises a flue 1, a damper 2 and a driving device 3, wherein the damper 2 is arranged in the flue 1, and the driving device 3 drives the damper 2 to open or close the flue 1.

Baffle 2 is rotatable through pivot 7 to be set up in flue 1, and pivot 7 is along 2 diameter direction fixed connection in baffle 2 sides of baffle, and 7 both ends of pivot accessible bearings are installed in 1 inner wall of flue, and pivot 7 have one end to stretch out in flue 1, and drive arrangement 3 drive pivot 7 is rotatory. The driving device 3 can be a motor, the driving device 3 is fixedly installed on the outer wall of the flue 1, and the driving device 3 can be driven to the rotating shaft 7 through a gear or a belt.

Notch 4 has been seted up at baffle 2 edge, and 1 inner wall of flue corresponds notch 4 and passes through screw or welded fastening and set up in the sprue 5 with notch 4 complex, and sprue 5 can set up the low reaches department that opens the direction at baffle 2. When the baffle plate is closed, the notch of the baffle plate and the blocking block form a sealing surface to cut off the flue gas channel.

When baffle 2 opened, notch 4 became the mediation passageway of cigarette ash, had reduced the moment of torsion that the baffle opened, and simultaneously, blockking 5 parallel arrangement formed the wind channel along the direction of flue 1, and the cigarette ash that piles up in blockking 5 front and back blows away from the wind channel during baffle 2 closed. When the valve plate is closed, the notch 4 of the valve plate and the blocking block 5 form a sealing surface to cut off the channel of smoke, and the gradually accumulated soot further improves the sealing effect.

In one embodiment:

the edge of one side of the baffle 2 is provided with a notch 4.

In another embodiment:

the two opposite side edges of the baffle 2 can be provided with notches 4, and in this embodiment, the notches 4 on the two sides are symmetrical by taking the rotating shaft 7 as an axis.

In one embodiment:

as shown in fig. 1, the number of the notches 4 may be plural, and the notches are uniformly arranged along the edge of the baffle 2, and the axis of each notch 4 may be arranged perpendicular to the rotating shaft 7.

In another embodiment:

as shown in fig. 2, the notch 4 is a wave-shaped groove continuously provided along the edge of the baffle 2.

As shown in fig. 3, in order to make the soot accumulated on the edge of the baffle pass through the slot more easily and further reduce the resistance of the soot to the baffle, the edge of the slot 4 may be integrally provided with a slope 6, and the slope 6 is the thickness of the baffle 2 near the slot 4 and becomes thinner towards the slot 4.

In addition, the inner wall of the flue 1 is fixedly provided with a limiting block 8 matched with the baffle 2, and the limiting block 8 can be arranged at the downstream of the opening direction of the baffle 2. Therefore, when the baffle plate is closed to the position of the limiting block, the flue is just completely closed.

In summary, the rake body is formed by forming a plurality of notches on the edge of the baffle plate.

At the same time, on the inner wall of the flue at the back of the downstream of the baffle, a blocking block similar to the height and width of the notch is mounted close to the baffle.

When the baffle plate is closed, the notch of the baffle plate and the blocking block form a sealing surface to cut off the flue gas channel. Cigarette ash has certain mobility under the dry condition, when the baffle was opened, because the notch of harrow formula body can become the mediation passageway of cigarette ash, the atress of consequently baffle can be less than the atress of whole piece baffle body a lot of, and then the phenomenon of moment can not appear, protects the retaining device, extension baffle and drive arrangement's life.

The above is only one embodiment of the present invention, and it should be noted that, for those skilled in the art, several similar modifications and improvements can be made without departing from the inventive concept of the present invention, and these should also be considered as within the protection scope of the present invention.

Claims

1. A harrow type flue damper is characterized in that: the device comprises a flue (1), a baffle (2) and a driving device (3), wherein the baffle (2) is rotatably arranged in the flue (1) through a rotating shaft (7), the rotating shaft (7) is arranged along the diameter direction of the baffle (2), and the driving device (3) drives the rotating shaft (7) to rotate and drives the baffle (2) to open or close the flue (1); only keep away from on baffle (2) the edge of pivot (7) is provided with notch (4), flue (1) inner wall corresponds notch (4) be provided with notch (4) complex sprue (5).

2. A rake flue damper as set forth in claim 1, wherein: the edge of one side of the baffle (2) is provided with the notch (4).

3. A rake flue damper as set forth in claim 1, wherein: the two side edges of the baffle (2) which are back to back are provided with the notches (4).

4. A rake flue damper as set forth in any one of claims 1-3, wherein: the number of the notches (4) is multiple, and the notches are uniformly arranged along the edge of the baffle (2).

5. A rake flue damper as set forth in any one of claims 1-3, wherein: the notch (4) is a wave-shaped groove which is continuously arranged along the edge of the baffle (2).

6. A rake flue damper as recited in claim 1, wherein: the edge of the notch (4) is provided with a slope (6).

7. A rake flue damper as set forth in claim 1, wherein: the inner wall of the flue (1) is provided with a limiting block (8) matched with the baffle (2).