CN112943956A - Air duct horizontal pneumatic isolation door and purging method thereof - Google Patents
Air duct horizontal pneumatic isolation door and purging method thereof Download PDFInfo
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- CN112943956A CN112943956A CN202110180789.3A CN202110180789A CN112943956A CN 112943956 A CN112943956 A CN 112943956A CN 202110180789 A CN202110180789 A CN 202110180789A CN 112943956 A CN112943956 A CN 112943956A
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- Prior art keywords
- purging
- door
- flashboard
- pneumatic
- lower track
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0254—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor being operated by particular means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0325—Control mechanisms therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention relates to the field of thermal power plants, in particular to a horizontal pneumatic isolation door of an air duct and a purging method thereof. The pneumatic gate comprises a pneumatic gate box body, a gate plate door execution cylinder and a purging system, wherein the gate plate door body is horizontally arranged in the pneumatic gate box body in a sliding manner through a gate plate upper track and a gate plate lower track; the purging system comprises a purging pipeline and a valve; the input end of the purging pipeline is connected with an external gas source, and the purging end is aligned with the lower track of the flashboard; the valve is arranged on the purging pipeline; the purging end of the purging pipeline is provided with a plurality of purging branches which are respectively aligned with the lower track of the flashboard; one part of the purging branch is aligned with the end part of the lower track of the flashboard, and the other part of the purging branch is aligned with the bottom part of the lower track of the flashboard. The invention has simple structure, is practical and economic, and can effectively eliminate the hidden trouble of ash deposition and jamming of the isolation door.
Description
Technical Field
The invention relates to the field of thermal power plants, in particular to a horizontal pneumatic isolation door of an air duct and a purging method thereof.
Background
The isolation door usually plays a role in sealing and blocking, has two functions of full opening and full closing, is flexible in opening and closing, has a better sealing measure, and has various isolation doors in the market along with the development of times, wherein the pneumatic isolation door is one of the isolation doors. In practical application, the pneumatic isolation door is widely applied to a section of a coal-fired power plant where primary hot air enters a coal mill, and the pneumatic isolation door is required to act quickly and flexibly and be sealed reliably. However, because the dust content in the primary hot air of the coal-fired power plant is high, the existing pneumatic isolation door has a large structural size and is easy to generate dust deposition and jamming faults in operation, and thus the operation reliability and safety of equipment are affected.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the horizontal pneumatic isolation door of the air duct and the purging method thereof, which have the advantages of simple structure, practicability and economy, and can effectively eliminate the hidden trouble of dust deposition and jamming of the isolation door.
The invention is realized by the following technical scheme:
a horizontal pneumatic isolation door of an air duct comprises a pneumatic door box body, a flashboard door execution cylinder and a purging system, wherein the flashboard door body is horizontally arranged in the pneumatic door box body in a sliding manner through a flashboard upper track and a flashboard lower track;
the purging system comprises a purging pipeline and a valve; the input end of the purging pipeline is connected with an external gas source, and the purging end is aligned with the lower track of the flashboard; the valve is arranged on the purging pipeline.
Furthermore, a plurality of purging branches which are respectively aligned with the lower track of the flashboard are arranged at the purging end of the purging pipeline; one part of the purging branch is aligned with the end part of the lower track of the flashboard, and the other part of the purging branch is aligned with the bottom part of the lower track of the flashboard.
Further, the valve comprises an isolation valve and a manual valve; the isolation valve is arranged on the input side of the purging pipeline; the manual valves are respectively and correspondingly arranged on the blowing branch circuits.
Furthermore, the diameter range of the pipeline of the purging pipeline is 15-30mm, and the connected external air source adopts compressed air.
Furthermore, the front end and the rear end of the bottom of the box body of the pneumatic door are respectively provided with an ash hole; the aperture range of the ash hole is 20-40mm, and an ash discharging pipe is arranged on the ash hole.
Furthermore, the length range of the ash discharging pipe is 60-80mm, and the tail end of the ash discharging pipe is provided with a sealing gland.
Furthermore, the side part of the pneumatic door box body is provided with an ash removal hand hole door; the ash removal hand hole door is fixedly arranged on the side part of the box body of the pneumatic door through a loose joint bolt and is sealed by adopting a concave-convex surface.
A method for purging a horizontal pneumatic isolation door of an air duct comprises the following steps,
the control valve opens the purging pipeline according to preset time;
and the lower track of the flashboard is swept through the sweeping branch, so that accumulated dust is removed.
Further, still including closing flashboard door body, opening the deposition on the track under the ash hole discharge flashboard.
Further, still including closing flashboard door body, opening deashing hand hole door and clear away the deposition on the lower track of flashboard.
Compared with the prior art, the invention has the following beneficial technical effects:
the purging system comprising the purging pipeline and the valve is arranged on the pneumatic door box body, the flashboard door body is horizontally arranged in the pneumatic door box body in a sliding mode through the upper track and the lower track of the flashboard, the purging end of the purging pipeline is aligned with the lower track of the flashboard, the corresponding valve is controlled, the flashboard door body is controlled through the flashboard door execution cylinder, the purging system is periodically opened to perform purging operation, dust accumulation at a joint is prevented, the structure is simple, high efficiency and convenience are achieved, and the jamming phenomenon is effectively prevented.
Furthermore, the end part and the bottom part of the lower track of the flashboard are respectively purged by adopting the plurality of purging branches, so that purging operation of different parts of the lower track of the flashboard can be performed according to actual needs, accumulated dust is timely removed, and the device is convenient, effective, practical and economical.
Furthermore, the invention controls the purging pipeline and each purging branch respectively by arranging the isolating valve and the manual valve, thereby having convenient operation and simple use.
Furthermore, the invention adopts a mode that the front end and the rear end of the bottom of the box body of the pneumatic door are respectively provided with the dust discharging holes, so that the dust accumulated on the two sides of the gate plate door body in the opening and closing operation process can be discharged in time, and the dust discharging pipe with the sealing gland is arranged on the dust discharging holes, so that the smooth discharge of the dust can be effectively ensured, the sealing can be effectively realized when the dust is not discharged, and the operation safety of the system is ensured. .
Furthermore, the ash removal hand hole door is arranged on the pneumatic door box body, so that ash can be removed by opening the ash removal hand hole door when ash is seriously accumulated, the furnace does not need to be shut down, and the ash removal hand hole door is sealed by adopting a concave-convex surface, so that the operation reliability and safety of equipment are effectively improved.
The method adopts the purging branch and the corresponding valve to purge different parts of the lower track of the flashboard, thereby effectively removing the accumulated dust; meanwhile, when the accumulated dust is constant, the accumulated dust can be discharged by opening the dust discharge hole, so that the occurrence of the dust accumulation unsmooth fault is further avoided; when the deposition is serious, the coal mill is only required to be stopped to close the gate plate door, and then the ash removal hand hole door can be opened to remove ash without stopping the furnace, so that the phenomenon of deposition and jamming of the pneumatic isolation door is effectively eliminated.
Drawings
Fig. 1 is a schematic structural diagram according to an embodiment of the present invention.
In the figure: 1-a shutter door body; 2-a gate actuating cylinder; 3-ash removal hand hole door; 4-ash holes; 5-purging the pipeline; 6-manual valve, 7-isolation valve, 8-pneumatic door box, 9-flashboard upper rail and 10-flashboard lower rail.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention relates to a horizontal pneumatic isolation door of an air duct, which comprises a pneumatic door box body 8, a flashboard door body 1, a flashboard door execution cylinder 2 and a purging system, wherein the flashboard door execution cylinder is arranged on the flashboard door body; the interior of the pneumatic door box body 8 is horizontally provided with a flashboard door body 1 in a sliding manner through a flashboard upper track 9 and a flashboard lower track 10, and the exterior is provided with a purging system; the flashboard door execution cylinder 2 is connected with the flashboard door body 1;
the front end and the rear end of the bottom of the pneumatic door box body 8 are respectively provided with an ash discharge hole 4, and the side part of the pneumatic door box body is fixedly provided with an ash removal hand hole door 3 through a loose joint bolt; the aperture range of the ash hole 4 is 20-40mm, and an ash discharging pipe with the length range of 60-80mm and a sealing gland is arranged on the ash hole; the length of the ash removal hand hole door 3 is 500mm, the width of the ash removal hand hole door is 300mm, and the ash removal hand hole door is sealed by adopting a concave-convex surface;
the purging system comprises a purging pipeline 5 and a valve consisting of an isolation valve 7 and a manual valve 6; the input end of the purging pipeline 5 is connected with an external gas source, and the purging end is respectively aligned to the end part and the bottom of the lower track 10 of the flashboard through a plurality of purging branches; the diameter range of the pipeline of the purging pipeline 5 is 15-30mm, the connected external air source adopts compressed air, and the input end is provided with an isolation valve 7; and the blowing branches are respectively provided with a manual valve 6.
In the preferred embodiment, five purging branches with the diameter of 20mm, an ash discharging pipe with the length of 80mm and an ash discharging hole 4 with the diameter of 30mm are taken as examples, and five purging branches, namely two ends and three bottoms, are additionally arranged at the bottom of the pneumatic door box body 8 and the lower track 10 of the gate plate; the end parts of the two paths are aligned above the end part of the lower track 10 of the flashboard, and the other path of the two paths of the end parts of the two paths of the end parts of the two paths of; the bottom three paths are respectively and alternately arranged at the bottom of the lower track 10 of the aligning flashboard; the specification diameter of the purging branch is 20mm, each branch is independently provided with a manual valve 6(DN15), and the input end of the purging pipeline 5 is provided with an isolating valve 7(DN 15); the air source at the input end of the purging pipeline 5 takes compressed air;
meanwhile, 1 ash hole 4 is additionally arranged at the front end and the rear end of the bottom of the pneumatic door box body 8 respectively, namely an opening with the diameter of 30mm is formed in the bottom shell, and an ash discharging pipe with a sealing gland (in threaded fit connection) and the length of 80mm is welded; and a 500 x 300 ash removal hand hole door 3 is additionally arranged at the side part of the pneumatic door box body 8, the ash removal hand hole door 3 needs to be sealed by adopting a concave-convex surface, and a loose joint bolt is fixed in a form so as to be convenient for quick opening and closing.
In actual operation, the purging pipeline 5 is periodically opened by controlling the isolation valve 7, and the corresponding manual valve 6 is controlled to enable each purging branch to purge different parts of the lower track 10 of the flashboard, so that accumulated dust is removed; when the accumulated dust is constant, the shutter door execution cylinder 2 is controlled, the shutter door body 1 is closed, and the accumulated dust is further prevented from being jammed through opening the dust discharge hole 4 to discharge the dust; when the deposition is serious, only need to shut down this coal pulverizer, control the gate door and carry out cylinder 2, close gate door body 1, alright open the 3 deashing of deashing hand hole door, need not to shut down the stove, and deashing hand hole door 3 adopts the concave and convex face to seal to effective improve equipment operational reliability and security.
On the basis of the device, the invention also provides a method for purging the horizontal pneumatic isolation door of the air duct, which comprises the following steps,
the control valve is used for opening the purging pipeline 5 according to preset time;
and the lower track 10 of the flashboard is purged through the purging branch to remove accumulated dust.
Wherein, still including closing flashboard door body 1, opening the deposition on the lower track 10 of flashboard of ash hole 4 discharge.
Wherein, still including closing flashboard door body 1, opening deashing hand hole door 3 and clear away the deposition on flashboard lower rail 10.
Claims (10)
1. The air duct horizontal pneumatic isolation door is characterized by comprising a pneumatic door box body (8), a flashboard door body (1) which is horizontally arranged in the pneumatic door box body (8) in a sliding manner through a flashboard upper track (9) and a flashboard lower track (10), a flashboard door execution cylinder (2) connected to the flashboard door body (1), and a purging system arranged on the pneumatic door box body (8);
the purging system comprises a purging pipeline (5) and a valve; the input end of the purging pipeline (5) is connected with an external gas source, and the purging end is aligned with the lower track (10) of the flashboard; the valve is arranged on the purging pipeline (5).
2. The air duct horizontal pneumatic isolation door of claim 1, wherein the purging end of the purging pipeline (5) is provided with a plurality of purging branches respectively aligned with the lower tracks (10) of the gate plates; one part of the purging branch is aligned with the end of the lower track (10) of the flashboard, and the other part of the purging branch is aligned with the bottom of the lower track (10) of the flashboard.
3. A duct horizontal pneumatic isolation door according to claim 1, wherein said valve comprises an isolation valve (7) and a manual valve (6); the isolation valve (7) is arranged on the input side of the purging pipeline (5); the manual valves (6) are respectively and correspondingly arranged on the blowing branch circuits.
4. The air duct horizontal pneumatic isolation door of claim 1, wherein the diameter of the purging pipeline (5) is in the range of 15-30mm, and the connected external air source adopts compressed air.
5. The air duct horizontal pneumatic isolation door of claim 1, wherein the front end and the rear end of the bottom of the pneumatic door box body (8) are respectively provided with an ash hole (4); the aperture range of the ash discharge hole (4) is 20-40mm, and an ash discharge pipe is arranged on the ash discharge hole.
6. The horizontal pneumatic isolation door of an air flue according to claim 5, wherein the length of the ash discharging pipe ranges from 60 mm to 80mm, and the tail end of the ash discharging pipe is provided with a sealing gland.
7. The air duct horizontal pneumatic isolation door of claim 1, wherein the side of the pneumatic door box body (8) is provided with an ash removal hand hole door (3); the ash removal hand hole door (3) is fixedly arranged at the side part of the pneumatic door box body (8) through a loose joint bolt and is sealed by adopting a concave-convex surface.
8. A method for purging a horizontal pneumatic isolation door of a wind tunnel according to any one of claims 1 to 7, comprising,
the control valve is used for opening the purging pipeline (5) according to preset time;
and the lower track (10) of the flashboard is purged through the purging branch to remove accumulated dust.
9. The method for purging the horizontal pneumatic isolation door of the air duct according to claim 8, further comprising closing the shutter door body (1) and opening the dust discharge hole (4) to discharge the dust accumulated on the lower rail (10) of the shutter.
10. The method for purging the horizontal pneumatic isolation door of the air duct according to claim 8, further comprising closing the shutter door body (1) and opening the ash removal hand hole door (3) to remove the ash deposited on the lower track (10) of the shutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110180789.3A CN112943956A (en) | 2021-02-07 | 2021-02-07 | Air duct horizontal pneumatic isolation door and purging method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110180789.3A CN112943956A (en) | 2021-02-07 | 2021-02-07 | Air duct horizontal pneumatic isolation door and purging method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112943956A true CN112943956A (en) | 2021-06-11 |
Family
ID=76245141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110180789.3A Pending CN112943956A (en) | 2021-02-07 | 2021-02-07 | Air duct horizontal pneumatic isolation door and purging method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112943956A (en) |
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2021
- 2021-02-07 CN CN202110180789.3A patent/CN112943956A/en active Pending
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