CN105135465A - Circular back-draft damper - Google Patents
Circular back-draft damper Download PDFInfo
- Publication number
- CN105135465A CN105135465A CN201510623736.9A CN201510623736A CN105135465A CN 105135465 A CN105135465 A CN 105135465A CN 201510623736 A CN201510623736 A CN 201510623736A CN 105135465 A CN105135465 A CN 105135465A
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- Prior art keywords
- shell
- square flange
- circular back
- welded
- draft damper
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Abstract
The intention relates to the technical field of electrical equipment, in particular to a circular back-draft damper which comprises a shell, wherein a square flange is welded at the opening position at the top of the shell; a cover plate is connected onto the square flange in a sealed manner through bolts; two steel pipes are respectively in welded connection with the opening positions at two ends of the shell in the length direction; an air flow direction sign is arranged on the surface of the shell; a baffling ring is fixed on the inner side at the inlet end of the shell; a waist-shaped hole plate is fixed above the baffling ring; a baffle is rotationally connected onto the waist-shaped hole plate. The circular back-draft damper is simple and reasonable in structure, relatively low in manufacturing cost, and safe and reliable during utilization, and has the advantage that a door sheet of the circular back-draft damper can be tightly closed to prevent leakage. Therefore, the circular back-draft damper is particularly applicable to the smoke flue and air flue systems of power station boilers.
Description
Technical field
The present invention relates to electrical equipment technical field, specifically a kind of circular non-return air door.
Background technology
The main accessory system in current domestic pulverized-coal fired boiler power plant comprises: fuel system, coal dust preparation system, water supply system, ventilating system, ash disposal dust pelletizing system, water treatment system, measurement and control system.Each accessory system is all equipped with corresponding auxiliary device and instrument.Wherein, ventilating system is sent to boiler, air-introduced machine and chimney after air is heated by air preheater by pressure fan, the flue gas of discharging in stove sent into the system in air.
In boiler operatiopn, when blower fan breaks down needs stoppage in transit maintenance, existing air door is not closed completely, especially induced-draught fan outlet damper air door fits badly, leak through the desulfurization fume come to make maintainer cannot enter blower interior to overhaul, can only shutdown maintenance be taked, cause loss economically to power plant.It is air door maintenance difficulty that existing air door also exists a problem.
Summary of the invention
The present invention is directed to the problems referred to above, provide a kind of circular non-return air door, this non-return air door structure is simple, flexible and convenient operation.
According to technical scheme of the present invention: a kind of circular non-return air door, it is characterized in that: comprise housing, case top opening is welded with square flange, and cover plate is connected on square flange by bolt seal, and housing along its length both ends open position is welded to connect a steel pipe respectively; Surface of shell is provided with airflow direction board, is fixed with back-up ring inside case entrances end, fixes waist orifice plate above back-up ring, and waist orifice plate is rotationally connected baffle plate.
As a further improvement on the present invention, sealing gasket is provided with between described cover plate and square flange.
As a further improvement on the present invention, a round flange is all welded in each described steel pipe outer face.
As a further improvement on the present invention, be fastenedly connected by hex nut, plain washer, hex bolts between described cover plate and square flange.
Technique effect of the present invention is: product structure of the present invention is simple, rationally, manufacturing cost is lower, safe and reliable in use procedure, and door-plate cuts out and tightly do not leak.Be specially adapted to station boiler flue and ducting system use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 be in Fig. 2 A-A to sectional view.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
In Fig. 1 ~ 3, comprise housing 1, airflow direction board 2, flange 3, steel pipe 4, round flange 5, hex bolts 6, plain washer 7, hex nut 8, back-up ring 9, waist orifice plate 10, baffle plate 11, cover plate 12, sealing gasket 13 etc.
As shown in Fig. 1 ~ 3, the present invention is a kind of circular non-return air door, comprises housing 1, and housing 1 open top position is welded with square flange 3, cover plate 12 is connected on square flange 3 by bolt seal, and housing 1 along its length both ends open position is welded to connect a steel pipe 4 respectively; Housing 1 surface is provided with airflow direction board 2, is fixed with back-up ring 9, fixes waist orifice plate 10 above back-up ring 9, waist orifice plate 10 is rotationally connected baffle plate 11 inside housing 1 entrance point.
Sealing gasket 13 is provided with between cover plate 12 and square flange 3.
A round flange 5 is all welded in each described steel pipe 4 outer face.
Be fastenedly connected by hex nut 8, plain washer 7, hex bolts 6 between cover plate 12 and square flange 3.
The course of work of the present invention is as follows: product of the present invention is installed in use in station boiler flue and ducting system and uses.When air-flow runs along airflow direction board 2 direction indication, can pass through smoothly, now blowing baffle plate 11, baffle plate 11 is rotated around waist orifice plate 10 by the fixed axis of upper end, abdicates passage to air-flow.When air-flow stops, under gravity, fall after rise downwards and be pressed on back-up ring 9, the sealing ring of baffle plate 11 end face matches with back-up ring 9 baffle plate 11, realizes sealing.
Claims (4)
1. a circular non-return air door, it is characterized in that: comprise housing (1), housing (1) open top position is welded with square flange (3), cover plate (12) is connected on square flange (3) by bolt seal, and housing (1) along its length both ends open position is welded to connect a steel pipe (4) respectively; Housing (1) surface is provided with airflow direction board (2), is fixed with back-up ring (9) inside housing (1) entrance point, and the fixing waist orifice plate (10) in back-up ring (9) top, waist orifice plate (10) is rotationally connected baffle plate (11).
2. according to circular non-return air door according to claim 1, it is characterized in that: between described cover plate (12) and square flange (3), be provided with sealing gasket (13).
3. according to circular non-return air door according to claim 1, it is characterized in that: a round flange (5) is all welded in each described steel pipe (4) outer face.
4. according to circular non-return air door according to claim 1, it is characterized in that: be fastenedly connected by hex nut (8), plain washer (7), hex bolts (6) between described cover plate (12) and square flange (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623736.9A CN105135465A (en) | 2015-09-25 | 2015-09-25 | Circular back-draft damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623736.9A CN105135465A (en) | 2015-09-25 | 2015-09-25 | Circular back-draft damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105135465A true CN105135465A (en) | 2015-12-09 |
Family
ID=54720919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510623736.9A Pending CN105135465A (en) | 2015-09-25 | 2015-09-25 | Circular back-draft damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105135465A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2746406A (en) * | 1952-06-26 | 1956-05-22 | Karjala Urho Nicholai | Furnace flue area reducing damper or baffle structure |
| EP0781964A1 (en) * | 1995-12-28 | 1997-07-02 | Remeha Fabrieken B.V. | Valve and a heating apparatus comprising such valve |
| CN2310250Y (en) * | 1997-09-12 | 1999-03-10 | 刘全喜 | Right angle cutting off round damper |
| CN2793578Y (en) * | 2005-05-08 | 2006-07-05 | 钱震军 | Non-return air door |
| CN101545631A (en) * | 2009-04-23 | 2009-09-30 | 无锡华光锅炉股份有限公司 | Improved air-adjusting door for circulating fluid bed boiler |
| CN102927325A (en) * | 2012-10-29 | 2013-02-13 | 宜兴台玉环境工程设备有限公司 | Circular automatic inverted air valve |
| CN204534626U (en) * | 2015-02-02 | 2015-08-05 | 上海湃胜实业有限公司 | Pneumatic non-return air door |
| CN204987069U (en) * | 2015-09-25 | 2016-01-20 | 无锡市华通电力设备有限公司 | Circular contrary air door that ends |
-
2015
- 2015-09-25 CN CN201510623736.9A patent/CN105135465A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2746406A (en) * | 1952-06-26 | 1956-05-22 | Karjala Urho Nicholai | Furnace flue area reducing damper or baffle structure |
| EP0781964A1 (en) * | 1995-12-28 | 1997-07-02 | Remeha Fabrieken B.V. | Valve and a heating apparatus comprising such valve |
| CN2310250Y (en) * | 1997-09-12 | 1999-03-10 | 刘全喜 | Right angle cutting off round damper |
| CN2793578Y (en) * | 2005-05-08 | 2006-07-05 | 钱震军 | Non-return air door |
| CN101545631A (en) * | 2009-04-23 | 2009-09-30 | 无锡华光锅炉股份有限公司 | Improved air-adjusting door for circulating fluid bed boiler |
| CN102927325A (en) * | 2012-10-29 | 2013-02-13 | 宜兴台玉环境工程设备有限公司 | Circular automatic inverted air valve |
| CN204534626U (en) * | 2015-02-02 | 2015-08-05 | 上海湃胜实业有限公司 | Pneumatic non-return air door |
| CN204987069U (en) * | 2015-09-25 | 2016-01-20 | 无锡市华通电力设备有限公司 | Circular contrary air door that ends |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151209 |