CN220707392U - High-temperature high-pressure boiler air door - Google Patents
High-temperature high-pressure boiler air door Download PDFInfo
- Publication number
- CN220707392U CN220707392U CN202321112590.8U CN202321112590U CN220707392U CN 220707392 U CN220707392 U CN 220707392U CN 202321112590 U CN202321112590 U CN 202321112590U CN 220707392 U CN220707392 U CN 220707392U
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- China
- Prior art keywords
- shaft sleeve
- air door
- end frame
- door
- plate
- Prior art date
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Links
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 235000014121 butter Nutrition 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 10
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000004519 grease Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000011418 maintenance treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Air Supply (AREA)
Abstract
The utility model discloses a high-temperature high-pressure boiler air door, which comprises an air door frame, wherein a driving end frame plate and a non-driving end frame plate are arranged on the air door frame, a door shaft with one end extending out of the non-driving end frame plate and the other end extending out of the driving end frame plate is arranged between the non-driving end frame plate and the driving end frame plate, a door plate which rotates along with the door shaft and is arranged in the air door frame is arranged on the door shaft, a shaft sleeve is arranged at one end of the door shaft extending out of the non-driving end frame plate, a pressing plate which is detachably connected with the non-driving end frame plate is sleeved on the shaft sleeve, and a ring shoulder fixed on the shaft sleeve is embedded between the pressing plate and the shaft sleeve; the end of the shaft sleeve, which is far away from the annular shoulder, is provided with a sealing plate, a plug is connected to the sealing plate in a threaded manner, one end of the plug is provided with a rotating part arranged outside the shaft sleeve, and the other end of the plug is provided with a pushing part arranged in the shaft sleeve. The boiler air door has the characteristics of easy maintenance, safe and stable use, complete overall function and strong practicability.
Description
Technical Field
The present utility model relates to a damper, and more particularly, to a high temperature and high pressure boiler damper.
Background
In existing boilers, dampers are typically used to control the air flow to control the combustion process. However, in the use process, the boiler air door is easily affected by temperature change, vibration, dust, sundries and the like, so that the air door is blocked, and the air door cannot be opened or closed in severe cases, thereby bringing potential safety hazard and economic loss to production.
In the combustion process of the circulating fluidized bed boiler, air is needed to participate, and the air quantity fluidization effect of a thermal force field in a combustion chamber are optimized, so that fuel is combusted more fully, and more heat energy is generated. Boiler dampers are devices used to regulate air flow and control the intensity and efficiency of combustion by controlling the amount of air entering the boiler.
To adapt to changes in external load
The device takes a fixing device of a boiler air door (model) as a research object, the appearance and the structure of the model air door are researched and analyzed, as shown in fig. 4, the model air door is controlled by an actuator of the air door through a 4-200mA command signal sent by a DCS system, the actuator drives three groups of butterfly-shaped blades in the air door to turn from 0 degree to 90 degrees through a lever, and the specific opening is controlled according to the air volume requirement and is fed back to the DCS through a displacement transmitter.
In actual operation, the situation of air door jam often occurs, and the air quantity is too large or too small to influence the boiler combustion efficiency, and the inspection is that the actuator failure can not drive the butterfly damper in the air door generally, and three or more butterfly gates need to be driven simultaneously by the same actuator, and if one group of butterfly wind jams, the whole air door can be possibly caused to be slow to adjust, and the multi-group butterfly gate jams can cause the whole air door to be blocked, thereby causing the overheating and burning out of the actuator.
Analyzing the reason of mechanical jamming of the air door, wherein each group of butterfly-shaped door consists of a door shaft and an upper group of shaft sleeves and a lower group of shaft sleeves, the main reason of jamming is that sundries such as rust and dust appear between the shaft sleeves and the door shaft, graphite fillers are arranged between the shaft sleeves at the driving end and the shaft for sealing, and after the problem occurs, the modes such as filler replacement and scale removal can be carried out, but after the non-driving end jams only wait for the boiler to stop, personnel enter a smoke duct for maintenance treatment, and the overall effect is poor. Accordingly, the utility model provides a high-temperature high-pressure boiler air door.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide the high-temperature high-pressure boiler air door which has the characteristics of easy maintenance and safe and stable use.
In order to solve the technical problems, the aim of the utility model is realized as follows: the utility model relates to a high-temperature high-pressure boiler air door which comprises an air door frame, wherein a driving end frame plate and a non-driving end frame plate are arranged on the air door frame, a door shaft with one end extending out of the non-driving end frame plate and the other end extending out of the driving end frame plate is arranged between the non-driving end frame plate and the driving end frame plate, a door plate which rotates along with the door shaft and is arranged in the air door frame is arranged on the door shaft, a shaft sleeve is arranged at one end of the door shaft extending out of the non-driving end frame plate, a pressing plate which is detachably connected with the non-driving end frame plate is sleeved on the shaft sleeve, and a ring shoulder fixed on the shaft sleeve is embedded between the pressing plate and the shaft sleeve.
The utility model is further provided with: the end of the shaft sleeve, which is far away from the annular shoulder, is provided with a sealing plate, a plug is connected to the sealing plate in a threaded manner, one end of the plug is provided with a rotating part arranged outside the shaft sleeve, and the other end of the plug is provided with a pushing part arranged in the shaft sleeve.
The utility model is further provided with: the pushing part is in a conical structure.
The utility model is further provided with: and the shaft sleeve is provided with a butter filling channel.
The utility model is further provided with: and the pressing plate is provided with a mounting hole, and a pressing screw which is in threaded connection with the non-driving end frame plate is penetrated into the mounting hole.
In summary, the utility model has the following beneficial effects: the high-temperature high-pressure boiler air door can realize maintenance adjustment without stopping the furnace, does not need personnel to enter the air duct for maintenance, increases the maintenance degree of equipment, reduces the workload of maintenance personnel, has perfect overall functions and strong practicability.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic view of a partial structure of the present utility model;
FIG. 3 is a schematic view of the structure of FIG. 2 from another perspective;
fig. 4 is a schematic structural view of a conventional boiler damper fixing device.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present utility model, preferred embodiments of the present utility model will be described below with reference to specific examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present utility model, and are not limiting the patent claims of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model will be further described with reference to the drawings and preferred embodiments.
Example 1
Referring to fig. 1 to 3, a high temperature and high pressure boiler air door according to this embodiment includes an air door frame, a driving end frame plate 1 and a non-driving end frame plate 2 are disposed on the air door frame, a door shaft 3 with one end extending out of the non-driving end frame plate and the other end extending out of the driving end frame plate is disposed between the non-driving end frame plate 2 and the driving end frame plate 1, a door plate 4 rotating along with the door shaft 3 and disposed in the air door frame is disposed on the door shaft 3, a shaft sleeve 5 is disposed at one end of the door shaft 3 extending out of the non-driving end frame plate 2, a pressing plate 6 detachably connected with the non-driving end frame plate 2 is sleeved on the shaft sleeve 5, and a ring shoulder 7 fixed on the shaft sleeve 5 is embedded between the pressing plate 6 and the shaft sleeve 5.
Further, a sealing plate 8 is arranged at one end of the shaft sleeve 5 away from the annular shoulder 7, a plug 9 is connected to the sealing plate 8 in a threaded manner, a rotating part 10 arranged outside the shaft sleeve is arranged at one end of the plug 9, and a pushing part 11 arranged in the shaft sleeve is arranged at the other end of the plug 9.
Further, the pushing portion 11 has a conical structure.
Further, the shaft sleeve 5 is provided with a butter filling channel 12.
Further, the pressing plate 6 is provided with a mounting hole 13, and a pressing screw which is in threaded connection with the non-driving end frame plate 2 is penetrated into the mounting hole 13.
In this embodiment, by screwing off the pressing screw, the pressing plate 6 can be removed in the axial direction, so that the shaft sleeve 5 with the annular shoulder 7 is free from axial limit, and the shaft sleeve 5 fixed with the annular shoulder 7 can be removed for maintenance or replacement, thereby being convenient to operate.
Wherein, through shrouding 8 and threaded connection on it end cap 9 setting, not only played isolated axle sleeve 5 inside effect, still can be under the condition of rotating end cap 9, adjust door axle 3 axial position, avoid door plant 4 and the contact of air door frame to lead to the jamming condition to take place.
By providing the grease filling channel 12, lubrication and channel cleaning inside the sleeve can be maintained by filling grease.
The inner wall of the shaft sleeve 5 is provided with a spiral oil groove, so that the grease can be filled in the groove to achieve the continuous lubrication effect.
According to the embodiment, the door shaft jackscrew can be disassembled for maintenance under the condition of no furnace shutdown, and the shaft sleeve can be wholly disassembled for inspection and maintenance when the clamping occurs. All materials adopt carbon steel plates, and have higher strength and rigidity.
To verify the effect of this new damper sleeve, we have performed experiments. The experiment selects a No. 1 boiler, and a novel air door shaft sleeve is respectively arranged at a primary air door and a secondary air door. In the experimental process, the air quantity and the air pressure of a boiler outlet are measured, the stability of a boiler air door is observed, and the running condition of the boiler is recorded.
Experimental results show that after the novel air door shaft sleeve is adopted, the air quantity and the air pressure at the outlet of the boiler change, the opening degree of the air door is smoothly adjusted, and the abnormal operation condition of the boiler caused by the clamping of the air door is avoided. Meanwhile, after half a year of running, the boiler is overhauled when the boiler is shut down, the shaft sleeve of the air door is taken down for inspection, and the lubricating grease in the boiler is normal and has no sundries such as dust. The success of the transformation of the air door shaft sleeve is proved by the normal operation of the No. 1 furnace for about one year.
The failure of the boiler air door is the most serious type of boiler failure, and the stability and the safety of the boiler can be improved through the improvement work of the boiler air door. The improvement scheme adopts a detachable bolt connection mode, avoids the possibility that the air door is required to be integrally maintained in later maintenance work, and reduces work. Experimental results show that the modification scheme can also effectively prevent the loosening and jumping of the boiler air door, and ensure the normal operation of the boiler. In the future we will further optimize the design of the removable damper hub to make it more suitable for use with various types of boiler dampers. Meanwhile, the related problems of the boiler system are continuously and deeply researched, and technical improvement and support are provided for safe and stable operation of the boiler.
Unless specifically stated otherwise, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the positional or positional relation is based on the actually shown positional or positional relation, it is merely for convenience of describing the present utility model and simplifying the description, and it is not necessary to indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional or positional relation in the present utility model are merely for exemplary illustration and are not to be construed as limitations of the present patent, and it is possible for those skilled in the art to combine the embodiments and understand the specific meaning of the above terms according to the specific circumstances.
Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" herein are to be construed broadly, e.g., they may be fixed, removable, or integral; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (5)
1. The utility model provides a high temperature high pressure boiler air door, includes the air door frame, is equipped with drive end frame board and non-drive end frame board on the air door frame, non-drive end frame board with be equipped with one end between the drive end frame board and stretch out the door axle that non-drive end frame board, other end stretched out the drive end frame board, be equipped with on the door axle and rotate and establish along with it door plant in the air door frame, its characterized in that: the door shaft stretches out one end of the non-driving end frame plate and is provided with a shaft sleeve, a pressing plate which is detachably connected with the non-driving end frame plate is sleeved on the shaft sleeve, and a circular shoulder which is fixed on the shaft sleeve is embedded between the pressing plate and the shaft sleeve.
2. The high temperature high pressure boiler damper according to claim 1, wherein: the end of the shaft sleeve, which is far away from the annular shoulder, is provided with a sealing plate, a plug is connected to the sealing plate in a threaded manner, one end of the plug is provided with a rotating part arranged outside the shaft sleeve, and the other end of the plug is provided with a pushing part arranged in the shaft sleeve.
3. The high temperature high pressure boiler damper according to claim 2, wherein: the pushing part is in a conical structure.
4. A high temperature, high pressure boiler damper according to any one of claims 1-3, wherein: and the shaft sleeve is provided with a butter filling channel.
5. The high temperature high pressure boiler damper according to claim 1, wherein: and the pressing plate is provided with a mounting hole, and a pressing screw which is in threaded connection with the non-driving end frame plate is penetrated into the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321112590.8U CN220707392U (en) | 2023-05-10 | 2023-05-10 | High-temperature high-pressure boiler air door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321112590.8U CN220707392U (en) | 2023-05-10 | 2023-05-10 | High-temperature high-pressure boiler air door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220707392U true CN220707392U (en) | 2024-04-02 |
Family
ID=90453025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321112590.8U Active CN220707392U (en) | 2023-05-10 | 2023-05-10 | High-temperature high-pressure boiler air door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220707392U (en) |
-
2023
- 2023-05-10 CN CN202321112590.8U patent/CN220707392U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |