CN207797090U - A kind of sliding connection structure for bypass flue - Google Patents
A kind of sliding connection structure for bypass flue Download PDFInfo
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- CN207797090U CN207797090U CN201820173477.3U CN201820173477U CN207797090U CN 207797090 U CN207797090 U CN 207797090U CN 201820173477 U CN201820173477 U CN 201820173477U CN 207797090 U CN207797090 U CN 207797090U
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- flue
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- bypass flue
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Abstract
A kind of sliding connection structure for bypass flue belongs to steam power plant field.In order to solve the problems, such as that existing steam power plant bypass flue connection is easy crack, deformation, damage occur for the utility model.The utility model includes flue collector, flue collector connection panel, bypass flue, bypass flue connection panel and pressing device, flue collector connect panel welding installation with flue collector, bypass flue connect panel welding installation with bypass flue, it is machined with kidney slot on bypass flue connection panel, pressing device passes through kidney slot that bypass flue is connected panel and connect panel foundation installation with flue collector, and the bypass flue connection panel after installation connect panel with flue collector and realizes opposite slide.The utility model structure design is flexible, ingenious, easy for installation, and meets normal, stable operation the demand of power station unit.
Description
Technical field
The utility model is related to a kind of bypass flue sliding connection structures of absorbable flue thermal expansion curve amount, belong to fire
Power field of generating equipment.
Background technology
Bypass flue is the flue in parallel with flue collector, can pass through the main cigarette of aperture regulation for changing bypass flue controllable register
Road flue gas flow, to realize scheduled function.Bypass flue has a wide range of applications in thermal power plant.
1. economizer bypass flue
The most ripe NOx control means of the current fired power generating unit of selective catalytic reduction (SCR) technology, in China's denitrating flue gas
It is occupied an important position in technology.However domestic coal unit both participates in peak regulation, often in underrun, SCR reactor inlets
Smoke temperature is often less than the optimal reaction temperature window of SCR catalyst, it is difficult to reach the requirement of low NOx drainage under full load.It saves
Coal device gas bypass installs flue additional before economizer entrance, and high-temperature flue gas is led to SCR system gas approach, i.e. partial fume
Not by economizer heat release, to improve denitration entrance flue gas temperature, meet unit underload denitration requirement.
2. wet desulphurization bypass flue
The wet flue gas desulfurizer that the country has put into operation or built is generally provided with 100% bypass flue, and installs
There is the by-pass damper of quick open function.When unit cold start, to avoid the pollution of flue dust and uncombusted oil droplet, flue gas from passing through
Bypass flue is directly discharged into chimney.Waiting for that smoke temperature increases, electrostatic precipitator puts into operation makes exhaust gas dust content be less than desulfurizer requirement
Afterwards, by-pass damper can be closed.In desulfurizer failure, by-pass damper can be quickly opened, desulfurizer is closed and imports and exports baffle,
Flue gas is directly entered air through bypass flue.I.e. desulfurizer bypass flue can guarantee normal, the safe and reliable fortune of desulfurizer
Row.
3. air preheater bypass flue
Low-level (stack-gas) economizer UTILIZATION OF VESIDUAL HEAT IN mode is widely used in thermal power generation unit, however the UTILIZATION OF VESIDUAL HEAT IN mode exist with
Lower deficiency：The temperature of boiler exhaust gas is relatively low, causes the heat transfer temperature difference of flue gas and condensed water relatively low, thus recyclable fume afterheat amount
It is limited, and heat exchanger cost and volume are larger, and the economy of engineer application is not high, the hair finally obtained by flue gas waste heat recovery
Motor group benefit of saving coal is also than relatively limited.
It is high for high water content brown coal exhaust gas temperature, and the limited situation of benefit of saving coal obtained by low-pressure coal saver scheme,
The bypass flue scheme in parallel with air preheater can be set in boiler tail.Due to part of smoke is without air preheater from
Bypass flue flows out so that the flue-gas temperature of air preheater outlet is lowered；Meanwhile relatively using temperature in bypass flue
High flue gas unit water supply and condensed water so that the Steam-water Quality that smoke heat energy is heated improves, higher to obtain
Benefit of saving coal.
However in these above-mentioned equipment with bypass flue connection structure, expansion joint is that air flue equipment absorbs cross
To the flexible structure of, axial displacement, the additional external force caused by smoke temperature, mechanical oscillation is can compensate for, to ensure bypass flue
Operational safety, in generating set operational process, expansion joint is chronically in hot environment, and by flue gas high temperature dust
Erosive wear, crack easily occurs, phenomena such as deformation, damage, pouring material fall off, causes to alter outside high-temperature flue gas and directly wash away expansion
Section outside face covering, and make its burn-through, it causes expansion joint to fail, it is made to lose flue thermal expansion curve compensation function, bypass cigarette
There is thermal stress in road, and longtime running causes flue to damage, and influences normal, the stable operation of power station unit.
Utility model content
Purpose of the utility model is to solve existing steam power plant bypass flues to connect easily generation crack, change
The problem of shape, damage, and then a kind of sliding connection structure for bypass flue is provided.
The technical solution of the utility model：
A kind of sliding connection structure for bypass flue includes flue collector, flue collector connection panel, bypass flue, bypass
Flue connects panel and pressing device, and it is flange connecting plate that flue collector connection panel, which connects panel with bypass flue,
The center that flue collector connection panel connects panel with bypass flue is machined with flue gas recirculation hole, the flue collector and main cigarette
Road connects panel welding installation, and bypass flue connect panel welding installation with bypass flue, and the bypass flue connects panel
On be machined with kidney slot, the pressing device passes through kidney slot that bypass flue is connected panel and connect panel foundation with flue collector
Installation, the bypass flue connection panel after installation connect panel with flue collector and realize opposite sliding.
Preferably：The pressing device includes screw rod, nut, butterfly spring, rolling wheel support and idler wheel, one end of screw rod
It is fixed on flue collector connection panel, the other end passes through the kidney slot on bypass flue connection panel, the rolling wheel support
Center is machined with through-hole, on rolling wheel support installation there are two idler wheel, the through-hole of its center of rolling wheel support with
Screw rod cooperation is installed and by the way that butterfly spring and nut check in rolling wheel support upper end is arranged.
Preferably：The quantity that kidney slot is machined on the bypass flue connection panel is at least four.
Preferably：The installation place that the flue collector connection panel connects panel with bypass flue is provided with sealant.
Preferably：The sealant is asbestos cord sealant.
Preferably：The installation site of the kidney slot is welded with anti-leak case, and anti-leak case includes shell and top
Lid, head cover, which is coordinated with shell by bolt, to be installed.
The utility model has the advantages that：
1. the utility model proposes bypass flue slip connection mode, may replace flue expansion joint compensation bypass flue
Thermal expansion curve can effectively solve the problems, such as the impaired failure of expansion joint, improve the reliability of power station unit bypass flue；
2. using the bypass flue slip connection mode of the utility model, bypass flue can not use flue expansion joint, subtract
Small engineering initial investment and the maintenance cost in later stage；
3. the utility model proposes a kind of pattern being slidably connected for bypass flue, the company of bypass flue and flue collector
It is connected in plane docking mode, and bypass flue opposite can be slided with the interplanar that docks of flue collector, to pass through the relative displacement
Absorb the air flue equipment thermal expansion curve amount that bypass flue generates in the process of running；
4. the utility model structure design is flexible, ingenious, easy for installation, and meets normal, the stable fortune of power station unit
Capable demand.
Description of the drawings
Fig. 1 is the structural front view of the utility model；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the front view of pressing device；
Fig. 4 is that Fig. 3 is vertical view；
Fig. 5 is the scheme of installation of rolling wheel support and idler wheel；
Fig. 6 is the installation front view of anti-leak case；
Fig. 7 is the sectional view at A-A in Fig. 6；
1- flue collectors in figure, 2- flue collectors connect panel, 3- bypass flues, and 4- bypass flues connect panel, and 5- compresses dress
It sets, 6- kidney slots, 7- screw rods, 8- nuts, 9- butterfly springs, 10- rolling wheel supports, 11- idler wheels, 12- sealants, 13- anti-leaks
Case, 14- shells, 15- head covers.
Specific implementation mode
To make the objectives, technical solutions and advantages of the present invention clearer, below by shown in the accompanying drawings
Specific embodiment describes the utility model.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit this reality
With novel range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid unnecessarily mixing
Confuse the concept of the utility model.
Specific implementation mode one：Illustrate present embodiment in conjunction with Fig. 1 to Fig. 7, one kind of present embodiment is for bypassing cigarette
The sliding connection structure in road includes flue collector 1, flue collector connection panel 2, bypass flue 3, bypass flue connection panel 4 and compresses
Device 5, it is flange connecting plate that flue collector connection panel 2, which connects panel 4 with bypass flue, and flue collector connects panel 2
The center that panel 4 is connected with bypass flue is machined with flue gas recirculation hole, and the flue collector 1 connect panel 2 with flue collector
Welding installation, bypass flue 3 connect the welding installation of panel 4 with bypass flue, are machined on bypass flue connection panel 4
Kidney slot 6, the pressing device 5 pass through kidney slot 6 that bypass flue is connected panel 4 and connect the foundation peace of panel 2 with flue collector
Dress, the bypass flue connection panel 4 after installation connect panel 2 with flue collector and realize opposite sliding.So set, the main cigarette
Road 1 connect the welding installation of panel 2 with flue collector, and flue collector 1 connect the flue gas of 2 center of panel with flue collector after welding installation
Recirculation hole is connected to, and bypass flue 3 connect the welding installation of panel 4, bypass flue 3 and bypass flue after welding installation with bypass flue
Connect the flue gas recirculation hole connection of 4 center of panel；The contact jaw of bypass flue and flue collector is plate-type flange connection installation,
The flue collector connection panel 2 of flue collector 1 connect 4 face contacting pattern of panel with the bypass flue of bypass flue 3, for by bypass flue
Bypass flue connection panel 4 be fixed on flue collector flue collector connection panel 2 on, be provided with pressing device 5, bypass flue connects
Contacting surface plate opens kidney slot along bypass flue expansion direction, and the length of kidney slot should ensure that the expansion displacement more than flue, to realize
The opposite sliding of flue collector and bypass flue, ensure that, in generating set operational process, flue collector and bypass flue are chronically at
It in hot environment, is influenced by the erosive wear of flue gas high temperature dust, it is de- that crack, deformation, damage, pouring material will not occur
It falls, it is ensured that the safety in operation of bypass flue improves the reliability of power station unit bypass flue.
Specific implementation mode two：Illustrate present embodiment in conjunction with Fig. 1 to Fig. 7, one kind of present embodiment is for bypassing cigarette
The sliding connection structure in road, the pressing device 5 include screw rod 7, nut 8, butterfly spring 9, rolling wheel support 10 and idler wheel 11,
One end of screw rod 7 is fixed on flue collector connection panel 2, and the other end passes through the kidney slot 6 on bypass flue connection panel 4, institute
The center for the rolling wheel support 10 stated is machined with through-hole, and there are two idler wheel 11, the idler wheel branch for installation on rolling wheel support 10
The through-hole of 10 its center of frame is with the cooperation of screw rod 7 installation and by the way that butterfly spring 9 and spiral shell in 10 upper end of rolling wheel support is arranged
Mother 8 locks.So set, screw rod both ends are threaded, wherein (flue collector contact in flue collector connection panel 2 is fixed in one end
Panel opens corresponding threaded hole), the other end is followed successively by bypass flue connection panel 4, idler wheel branch by being fixed using nut between screw rod
Frame 10 and idler wheel 11, butterfly spring 9, in bypass flue expansion process, pressing device connects panel 2 not relative to flue collector
Dynamic, idler wheel 11 rolls on bypass flue connection panel 4, to complete the opposite sliding of flue collector and bypass flue, wherein rolling
Wheel is the cylinder that a both ends are thin, centre is thick, and the thin part in both ends is fixed in the hole of rolling wheel support, plays the work of rotation axis
With；Intermediate thick part is contacted with bypass flue connection panel 4, plays the role of sliding.
Specific implementation mode three：Illustrate present embodiment in conjunction with Fig. 1 to Fig. 7, one kind of present embodiment is for bypassing cigarette
The sliding connection structure in road is machined with the quantity of kidney slot 6 on bypass flue connection panel 4 and is at least four.So
Setting, bypass flue connects is arranged at least four kidney slots 6 on panel 4, by the kidney slot 6 of this four points so that compressing dress
Panel 2 can be connected flue collector to connect with bypass flue 4 stable connection of panel firm by setting 5.
Specific implementation mode four：Illustrate that present embodiment, one kind of present embodiment are used for bypass flue in conjunction with Fig. 1, Fig. 2
Sliding connection structure, flue collector connection panel 2 connects the installation place of panel 4 with bypass flue and is provided with sealant
12。
Specific implementation mode five：Illustrate that present embodiment, one kind of present embodiment are used for bypass flue in conjunction with Fig. 1, Fig. 2
Sliding connection structure, the sealant 12 be asbestos cord sealant.So set, in order to prevent in flue flue gas leakage or
Environmental air enters flue, is sealed in bypass flue plate-type flange surrounding setting nylon rope.
Specific implementation mode six：Illustrate present embodiment in conjunction with Fig. 1 to Fig. 7, one kind of present embodiment is for bypassing cigarette
The installation site of the sliding connection structure in road, the kidney slot 6 is welded with anti-leak case 13, and anti-leak case 13 includes shell
Body 14 and head cover 15, head cover 15, which is coordinated with box body 14 by bolt, to be installed.In order to avoid there are flue gases at bypass flue kidney slot
Or the leakage of air, pressing device 5, kidney slot 6 are sealed using anti-leak case 13, anti-leak case is by shell and top
Lid composition, as shown in fig. 7, shell is made of 4 blocks of steel plates, is welded in bypass flue touch panel surface, head cover is located on shell
Face is connected by screw bolts for convenience of the installation and maintenance of pressing device between head cover and shell, so that one cuboid of formation is close
Seal structure.
Present embodiment is only to the exemplary description of this patent does not limit its scope of protection, people in the art
Member can also be changed its part, as long as it does not exceed the essence of this patent, within the protection scope of the present patent.
Claims (6)
1. a kind of sliding connection structure for bypass flue, it is characterised in that：Panel is connected including flue collector (1), flue collector
(2), bypass flue (3), bypass flue connection panel (4) and pressing device (5), the flue collector connect panel (2) and side
Road flue connection panel (4) is flange connecting plate, and flue collector connection panel (2) connects the center of panel (4) with bypass flue
Position is machined with flue gas recirculation hole, and the flue collector (1) connect panel (2) welding installation with flue collector, bypass flue (3) with
Bypass flue connects panel (4) and welds installation, and kidney slot (6) is machined on bypass flue connection panel (4), described
Pressing device (5) passes through kidney slot (6) that bypass flue connection panel (4) is connect panel (2) with flue collector and establishes installation, installation
Bypass flue connection panel (4) afterwards connect panel (2) with flue collector and realizes opposite sliding.
2. a kind of sliding connection structure for bypass flue according to claim 1, it is characterised in that：The compression
Device (5) includes screw rod (7), nut (8), butterfly spring (9), rolling wheel support (10) and idler wheel (11), and one end of screw rod (7) is solid
It is scheduled on flue collector connection panel (2), the other end passes through the kidney slot (6) on bypass flue connection panel (4), the idler wheel
The center of holder (10) is machined with through-hole, and there are two idler wheel (11), the rolling wheel supports for installation on rolling wheel support (10)
(10) through-hole Yu screw rod (7) the cooperation installation of its center and the butterfly spring by setting in rolling wheel support (10) upper end
(9) it is locked with nut (8).
3. a kind of sliding connection structure for bypass flue according to claim 1, it is characterised in that：The bypass
The quantity that kidney slot (6) is machined on flue connection panel (4) is at least four.
4. a kind of sliding connection structure for bypass flue according to claim 1, it is characterised in that：The main cigarette
The installation place that road connection panel (2) connects panel (4) with bypass flue is provided with sealant (12).
5. a kind of sliding connection structure for bypass flue according to claim 4, it is characterised in that：The sealing
Layer (12) is asbestos cord sealant.
6. a kind of sliding connection structure for bypass flue according to claim 1, it is characterised in that：The kidney-shaped
The installation site in hole (6) is welded with anti-leak case (13), and anti-leak case (13) includes shell (14) and head cover (15), head cover
(15) coordinated by bolt with shell (14) and installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820173477.3U CN207797090U (en) | 2018-01-31 | 2018-01-31 | A kind of sliding connection structure for bypass flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820173477.3U CN207797090U (en) | 2018-01-31 | 2018-01-31 | A kind of sliding connection structure for bypass flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207797090U true CN207797090U (en) | 2018-08-31 |
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ID=63267112
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820173477.3U Active CN207797090U (en) | 2018-01-31 | 2018-01-31 | A kind of sliding connection structure for bypass flue |
Country Status (1)
| Country | Link |
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| CN (1) | CN207797090U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715312A (en) * | 2019-10-24 | 2020-01-21 | 哈尔滨锅炉厂有限责任公司 | Hanging sealing device for tail flue of gas boiler |
| CN112728570A (en) * | 2020-12-29 | 2021-04-30 | 中国电力工程顾问集团东北电力设计院有限公司 | Smoke exhaust device and thermal generator set |
-
2018
- 2018-01-31 CN CN201820173477.3U patent/CN207797090U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715312A (en) * | 2019-10-24 | 2020-01-21 | 哈尔滨锅炉厂有限责任公司 | Hanging sealing device for tail flue of gas boiler |
| CN110715312B (en) * | 2019-10-24 | 2021-10-01 | 哈尔滨锅炉厂有限责任公司 | Hanging sealing device for tail flue of gas boiler |
| CN112728570A (en) * | 2020-12-29 | 2021-04-30 | 中国电力工程顾问集团东北电力设计院有限公司 | Smoke exhaust device and thermal generator set |
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