CN106090970B - A kind of desulphurization fume baffle door and blade - Google Patents
A kind of desulphurization fume baffle door and blade Download PDFInfo
- Publication number
- CN106090970B CN106090970B CN201610460446.1A CN201610460446A CN106090970B CN 106090970 B CN106090970 B CN 106090970B CN 201610460446 A CN201610460446 A CN 201610460446A CN 106090970 B CN106090970 B CN 106090970B
- Authority
- CN
- China
- Prior art keywords
- baffle
- axis
- outline border
- electromagnet
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
- Air Supply (AREA)
Abstract
The present invention provides a kind of desulphurization fume baffle door, including an outline border, and at least one axis being mounted on outline border when the axis has multiple, is uniformly distributed between each axis along outline border；The baffle being fixed on axis is both provided with sealing strip on two baffles, and baffle upper edge is provided with sealing strip, and under the baffle along being provided with sealing strip, the sealing strip is in sector, and resilientiy stretchable.The baffle is multi-layer compound structure, is respectively arranged with cavity at the both ends of the innermost layer, has an electromagnet, the electromagnet pole between upper and lower two baffles opposite in the cavity.Twi-tier blade medium design of the present invention has fan-shaped sealing strip, and the seal gas of at least above flue gas pressures 1000Pa is passed through baffle, makes to form seal gas separation layer between dual-layered baffle plate, blocks passing through for flue gas stream.Blade uses composite layered structure, can improve its strength and stiffness.Gas baffle door further improves sealing effect by the principle of electromagnet.
Description
Technical field
It is especially a kind of with fan-shaped close sealing strip and electromagnet the present invention relates to a kind of gas baffle door of desulfurizer
Desulphurization fume baffle door, belong to technical field of environment protection equipment.
Background technology
Board gate of flue gas desulfurization is mainly used in the flue gas desulphurization system (FGD) of thermal power plant, for completely cutting off flue gas circulation,
It can be used in the relatively high smoke wind pipe of other operation insulation requests.In sweetening process, gas baffle door is flue gas emission
Important equipment directly affects the normal operation and safety of boiler system and desulphurization system.Desulfuration baffle door is de- for flue gas
On sulphur system absorption tower import and export or bypass flue, or it is used in denitrating flue gas and flue gas dust collecting system, air door generally use hundred
Leaf window dual-layered baffle plate structure is passed through sealing air when shutdown between dual-layered baffle plate, realize the effect of isolation shutdown flue gas.Usually exist
Equipped with outside sealing element on every layer of baffle door, it also is passed through sealing gas into the cavity of two layers of baffle door, to further increase gear
The leakproofness of plate door.If entered, outlet damper Men Bushe enclosed air systems, when FGD stops transport, since the blade of baffle has gap
In the presence of heat smoke can be leak into FGD systems, cause the corrosion in system.Meanwhile enter, outlet damper door sets enclosed air system and exists
Personnel can be protected when FGD systems inspections.During boiler is run with bypass flue, inside flue system and absorption tower
When carrying out component inspection and maintenance, separate bypass with sealing air baffle to carry out personal protection.
In addition, the shape and structure corrosion resistance of the blade of existing baffle door are poor, due to constantly corroding and consuming,
Its sealing effect can gradually weaken, and diaphragm seal is all made of strip, will produce the dislocation of item and item in use, or even mutually
Mutually support is swelled and can not be sealed.Many defects existing for existing sealing technique will lead to the failure of sealing.
Invention content
In order to solve the above technical problems, technical solution provided by the invention is as follows.
A kind of desulphurization fume baffle door, including an outline border, the outline border are stainless steel material, and outside is coated with resistant to sulfur corruption
Corrosion material；At least one axis on outline border when the axis has multiple, is uniformly distributed between each axis along outline border；It is fixed on
Baffle on axis, the shaft end have airtight and watertight padding, and by the gap sealing between axis and outline border, the airtight and watertight padding material is poly-
Tetrafluoroethene, the aperture with multiple equidistantly distributeds, the penetrating center line across axis of the aperture, the baffle on the axis
Rectangular, rectangle long side centerline direction has a perforation, and the penetration hole diameter is equal or slightly larger than the diameter of the axis, described
Axis can pass through the perforation of the baffle.
Location hole corresponding with the aperture position on the axis is distributed in the perforation of baffle described further, when the axis
When across the perforation of the baffle, aperture thereon is corresponding with the location hole on baffle.Pass through one per a pair of aperture and location hole
Screw and nut is fixed, and the diameter of the screw is equal with the internal diameter of the location hole and aperture.
At least one end of the axis extends outwardly after passing through outline border, and extension is equipped with rocking bar, has between the rocking bar of each axis
Each axis is interconnected and is realized the linkage of each axis by connecting rod, connecting rod.The seal gas flow-guiding mouth of the outer arch of the baffle door into
Intake valve is housed, intake valve control-rod connects seal gas valve drive link through being fixed on arch outside baffle door on tuyere flange
It ushers to seat and is connected with connecting rod by rocking arm after bearing with spherical outside surface.
The frame of gas baffle is made of integral die or shaped steel.Baffle uses streamlined design, baffle to be surrounded by
Nickel alloy diaphragm seal.
Most preferably, being both provided with sealing strip on two baffles, baffle upper edge is provided with the first sealing strip, is keeping off
Plate lower edge is provided with the second sealing strip, and the sealing strip is in sector, and resilientiy stretchable.
The baffle be multi-layer compound structure, the composite construction be three-decker, innermost layer is iron material, it is described most
It is carbon steel material to have a middle layer, the middle layer outside internal layer, and the middle layer coats innermost layer completely, and outermost layer is anti-corrosion
Stainless steel material, outermost layer coat middle layer completely.It is respectively arranged with cavity at the both ends of the innermost layer, is had in the cavity
There is an electromagnet, the electromagnet pole between upper and lower two baffles on the contrary, when blade needs to be closed, open by the electromagnet
It opens, under the attraction of electromagnet, each blade will produce attraction up and down so that generate pulling force mutually between each blade；On the axis
The hollow tube of a placement conducting wire is opened up, one end of the hollow tube can be connected by a hole with the baffle, the electromagnet
Conducting wire can pass through the hole to extend to the outside of axis along conduit, be connect with power supply system.
The present invention can reach following beneficial technique effect：Flue gas desulfurization Double-layer blind formula baffle door provided by the invention
Double multiple damper structures are driven using single shaft, twi-tier blade medium design has fan-shaped sealing strip, by least above flue gas pressure
The seal gas of power 1000Pa is passed through baffle, makes to form seal gas separation layer between dual-layered baffle plate, blocks passing through for flue gas stream.
Baffle door hull outside is designed with link mechanism, and it is in shutter streamlined way to open and close each blade of baffle after optimization design, is opened
Synchronization is opened or closed, realizes integration operation.Blade is rigidly good, stable and reliable operation, be passed through between blade with certain pressure and
After the seal gas of flow, it can effectively completely cut off flue gas stream before and after blade, to make flapper door seal efficiency be 100%.Baffle door
Flexible, no bite phenomenon is rotated in the case where ensureing operating condition.Baffle design streamlining structure can fully reduce the resistance to air-flow
Power.Blade uses composite layered structure, can improve its strength and stiffness.Gas baffle door is further carried by the principle of electromagnet
High sealing effect.
Description of the drawings
Fig. 1 is wind blocking door schematic diagram of the present invention；
Fig. 2 is wind blocking door connecting rod and rocking bar position view of the present invention；
Fig. 3 is blade and strip of paper used for sealing schematic diagram of the present invention；
Fig. 4 is blade multilayered structure schematic diagram of the present invention.
Specific implementation mode
Below in conjunction with drawings and examples, the present invention will be described in further detail.It should be appreciated that described herein
Specific examples are only used to explain the present invention, is not intended to limit the present invention.
A kind of desulphurization fume baffle door is disclosed in first embodiment of the invention, as shown in Figure 1, the baffle door includes one
Outline border 1, the outline border are stainless steel material, and outside is coated with sulfur corrosion resistant material；At least one axis on outline border
2, when the axis 2 has multiple, it is uniformly distributed along outline border 1 between each axis 2；The baffle 3 being fixed on axis 2.The shaft end has close
Packing material, by the gap sealing between axis 2 and frame, the airtight and watertight padding material is polytetrafluoroethylene (PTFE), is used for damper vanes
The sealing of shaft end, prevents smoke spillage.The filler is corrosion-resistant, wear-resisting, and self-lubricating, friction coefficient is small, and sealing effect is good.
Aperture with multiple equidistantly distributeds, the penetrating center line across axis 2 of the aperture, the gear on the axis 2
Plate 3 is rectangular, and there is rectangle long side centerline direction a perforation, the penetration hole diameter to be equal or slightly larger than the diameter of the axis 2,
The axis 2 can pass through the perforation of the baffle 3.It is distributed in the perforation of the baffle 3 and the aperture position pair on the axis 2
The location hole answered, when the axis 2 passes through the perforation of the baffle 3, aperture thereon is corresponding with the location hole on baffle 3.Often
A pair of of aperture and location hole are fixed by a screw and nut, the diameter of the screw and the location hole and the internal diameter of aperture
It is equal.In this way, baffle 3 can be fixed with axis 2.
Referring to attached drawing 2, at least one end of the axis 2 extends outwardly after outline border 1, and extension is equipped with rocking bar 4.Each axis 2
Rocking bar 4 between there is connecting rod 5, each axis interconnects and realized the linkage of each axis by connecting rod 2.
Intake valve, intake valve are housed on the air inlet flange of the seal gas flow-guiding mouth at 1 top of baffle door outline border
Control-rod connection seal gas valve drive link 4 passes through rocking arm after being fixed on the bearing with spherical outside surface of usheing to seat at 1 top of baffle door outline border
It is connected with connecting rod.Link mechanism has good synchronism with blade (i.e. baffle 3).Mechanical linkage is understood due to the presence of sideshake
Not dead phenomenon is closed in appearance.
The frame of gas baffle is made of integral die or shaped steel, has good strength and stiffness.Protection screen knot
Structure is considered as the inside and outside inconsistent phenomenon of change in size caused by eliminating internal-external temperature difference.
In the following implementation of the present invention, improved for blade.
First, all damper vanes use streamlined design, system resistance small.Blade is surrounded by nickel alloy sealing
Piece is passed through the sealing air that 500Pa is reached than maximum pressure in flue residing for baffle when baffle door is closed, and reaches partition medium
Purpose.
Optionally, it can be increased in the presence of gap between blade after a period of use using simple mechanical linkage sealing, leaf
The problems such as piece misplaces is deteriorated so as to cause sealing effect, and therefore, the present invention proposes a kind of improved plan.
As shown in figure 3, being both provided with sealing strip on two blades, 31 upper edge of blade is provided with the first sealing strip 31,
32 lower edge of blade is provided with the second sealing strip 32.The sealing strip is in sector, and resilientiy stretchable.In this way, in sealing,
Two sealing strips squeeze mutually, have reached sealing effect, meanwhile, because using sector structure, elastic deformation is occurring for sealing strip
Relatively urine can play sealing function, and also be easy to restore to the original state after blade separation.
In order to further reach sealing effect, by leaf production at multi-layer compound structure.As shown in figure 4, the blade
For three-decker, innermost layer 311 is iron material, is with a middle layer 312, the middle layer 312 outside the innermost layer 311
Carbon steel material, the middle layer 312 cladding innermost layer 311, outermost layer 313 completely are corrosion resisting stainless steel material, and outermost layer 313 is complete
Full cladding middle layer 312.It selects corrosion resisting stainless steel to do the outermost layer of blade panel material, unheated seal gas can be used.This
When, the corrosion of baffle and acid condensate liquid caused by smoke contacts surface is undertaken by corrosion resistant plate.In view of outermost layer corrosion resistant
Erosion stainless steel material inevitably will produce in use to fall off or is corroded, therefore middle layer makees panel using ordinary carbon steel
Material, temperature in use are more than the seal gas of water dew point, it can be ensured that anhydrous condensate liquid is generated in air outlet and baffle blades surface.
It is further preferable that referring to Fig. 4, cavity 314 is respectively arranged at the both ends of the innermost layer, in the cavity 314
With an electromagnet 315, the electromagnet pole between upper and lower two blades is opposite.When blade needs to be closed, the electromagnet
It opens, under the attraction of electromagnet, each blade will produce attraction up and down so that generate pulling force between each blade mutually, so
Its sealing effect can be further increased.It will be clear to one skilled in the art that the power supply system of electromagnet can be arranged
Outside baffle door.Can open up the hollow tube of a placement conducting wire on the shaft, one end of the hollow tube can by a hole with
The baffle (blade) is connected, and the conducting wire of the electromagnet can extend to the outside of axis 2 across the hole along conduit, with confession
Electric system connects.
The present invention can reach following beneficial technique effect：Flue gas desulfurization Double-layer blind formula baffle door provided by the invention
Double multiple damper structures are driven using single shaft, twi-tier blade medium design has fan-shaped sealing strip, by least above flue gas pressure
The seal gas of power 1000Pa is passed through baffle, makes to form seal gas separation layer between dual-layered baffle plate, blocks passing through for flue gas stream.
Baffle door hull outside is designed with link mechanism, and it is in shutter streamlined way to open and close each blade of baffle after optimization design, is opened
Synchronization is opened or closed, realizes integration operation.Blade is rigidly good, stable and reliable operation, be passed through between blade with certain pressure and
After the seal gas of flow, it can effectively completely cut off flue gas stream before and after blade, to make flapper door seal efficiency be 100%.Baffle door
Flexible, no bite phenomenon is rotated in the case where ensureing operating condition.Baffle design streamlining structure can fully reduce the resistance to air-flow
Power.Blade uses composite layered structure, can improve its strength and stiffness.Gas baffle door is further carried by the principle of electromagnet
High sealing effect.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not office
Be limited to form disclosed herein, be not to be taken as excluding other embodiments, and can be used for various other combinations, modification and
Environment, and can be changed by the above teachings or related fields of technology or knowledge in the scope of the invention is set forth herein
It is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present invention
In scope of the claims.
Claims (7)
1. a kind of desulphurization fume baffle door, including an outline border (1), the outline border (1) are stainless steel material, outside is coated with resistance to
Sulfur corrosion material；At least one axis (2) on outline border (1), when the axis (2) has multiple, along outline border between each axis (2)
(1) it is uniformly distributed；And it is fixed on the baffle (3) on axis (2), it is characterised in that：Axis (2) end has airtight and watertight padding, will
Gap sealing between axis (2) and outline border (1), the airtight and watertight padding material are polytetrafluoroethylene (PTFE), are had on the axis (2) multiple
The aperture of equidistantly distributed, the penetrating center line across axis (2) of the aperture, the baffle (3) is rectangular, rectangle long side center
There is a perforation, the penetration hole diameter to be equal or slightly larger than the diameter of the axis (2) in line direction, and the axis (2) can pass through institute
The perforation for stating baffle (3) is both provided with sealing strip on two baffles (3), and in baffle (3), upper edge is provided with the first sealing
Item (31) is provided with the second sealing strip (32) in baffle (3) lower edge, and the sealing strip is in sector, and resilientiy stretchable, described
Baffle (3) is multi-layer compound structure, and the composite construction is three-decker, and innermost layer (311) is iron material, in the innermost layer
(311) it is carbon steel material to have a middle layer (312), the middle layer (312) outside, and the middle layer (312) cladding completely is most
Internal layer (311), outermost layer (313) are corrosion resisting stainless steel material, and outermost layer (313) coats middle layer (312) completely, it is described most
The both ends of internal layer (311) are respectively arranged with cavity (314), have an electromagnet (315) in the cavity (314), upper and lower two
Electromagnet pole between baffle on the contrary, when blade needs to be closed, open by the electromagnet, under the attraction of electromagnet,
Each blade will produce attraction up and down so that generate pulling force mutually between each blade；It is opened up in a placement conducting wire on the axis (2)
One end of blank pipe, the hollow tube can be connected by a hole with the baffle (3), and the conducting wire of the electromagnet can be across described
Hole extends to the outside of axis (2) along conduit, is connect with power supply system.
2. desulphurization fume baffle door as described in claim 1, it is characterised in that：Be distributed in the perforation of the baffle (3) with
The corresponding location hole of aperture position on the axis (2), when the axis (2) passes through the perforation of the baffle (3), thereon small
Hole is corresponding with the location hole on baffle 3.
3. desulphurization fume baffle door as described in claim 1, it is characterised in that：Pass through a screw per a pair of aperture and location hole
It is fixed with nut, the diameter of the screw is equal with the internal diameter of the location hole and aperture.
4. desulphurization fume baffle door as described in claim 1, it is characterised in that：At least one end of the axis (2) passes through outline border
(1) extend outwardly after, extension is equipped with rocking bar (4), has connecting rod (5) between the rocking bar (4) of each axis (2), and connecting rod (2) is by each axis
Interconnect and realize the linkage of each axis.
5. desulphurization fume baffle door as claimed in claim 4, it is characterised in that：It is close at the top of the baffle door outline border (1)
It seals and intake valve is housed on the air inlet flange of air conducting mouth, intake valve control-rod connects seal gas valve drive link through being fixed on
It is connected with connecting rod by rocking arm after bearing with spherical outside surface of usheing to seat at the top of baffle door outline border (1).
6. desulphurization fume baffle door as described in claim 1, it is characterised in that：The frame of gas baffle using integral die or
Shaped steel is made.
7. desulphurization fume baffle door as described in claim 1, it is characterised in that：Baffle (3) uses streamlined design, baffle four
Week is equipped with nickel alloy diaphragm seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460446.1A CN106090970B (en) | 2016-06-23 | 2016-06-23 | A kind of desulphurization fume baffle door and blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460446.1A CN106090970B (en) | 2016-06-23 | 2016-06-23 | A kind of desulphurization fume baffle door and blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106090970A CN106090970A (en) | 2016-11-09 |
| CN106090970B true CN106090970B (en) | 2018-07-17 |
Family
ID=57253157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610460446.1A Active CN106090970B (en) | 2016-06-23 | 2016-06-23 | A kind of desulphurization fume baffle door and blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106090970B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270317A (en) * | 2017-03-20 | 2017-10-20 | 南京碧林环保科技有限公司 | Inflatable Expansion sealing gas baffle door |
| CN107202335A (en) * | 2017-07-11 | 2017-09-26 | 云汇环保科技南通有限公司 | A kind of special flue gas desulfurization air door of metallurgical furnace |
| CN108278627B (en) * | 2018-01-24 | 2023-09-08 | 宁波世茂能源股份有限公司 | Large-scale flue does not have leakage sealing system |
| CN110332560B (en) * | 2019-07-12 | 2021-07-30 | 德州众生环保科技有限公司 | Desulfurization flue gas damper |
| CN110454778A (en) * | 2019-09-11 | 2019-11-15 | 哈尔滨红光锅炉总厂有限责任公司 | A kind of device improving circulating fluidized bed boiler tail portion corrosion and dust stratification |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29901368U1 (en) * | 1999-01-27 | 1999-08-12 | Haenchen Siegmund | Chimney cover |
| CN2733192Y (en) * | 2004-09-02 | 2005-10-12 | 湖北洪城通用机械股份有限公司 | Smoke desulfurizing venetian antiseptic type double-layer double sealing baffle plate door |
| CN2755448Y (en) * | 2004-10-26 | 2006-02-01 | 泰安市利德容器制造有限公司 | Smoke guard door |
| CN201866271U (en) * | 2010-11-30 | 2011-06-15 | 中冶北方工程技术有限公司 | Bellow butterfly valve with wear resistance for sintering machine |
| CN102705853A (en) * | 2012-07-03 | 2012-10-03 | 山东国舜建设集团有限公司 | Stainless steel-coated baffle plate door |
| CN105605232A (en) * | 2016-03-01 | 2016-05-25 | 江苏长隆圣宏冶金设备制造有限公司 | Pressure-sealing damper |
-
2016
- 2016-06-23 CN CN201610460446.1A patent/CN106090970B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29901368U1 (en) * | 1999-01-27 | 1999-08-12 | Haenchen Siegmund | Chimney cover |
| CN2733192Y (en) * | 2004-09-02 | 2005-10-12 | 湖北洪城通用机械股份有限公司 | Smoke desulfurizing venetian antiseptic type double-layer double sealing baffle plate door |
| CN2755448Y (en) * | 2004-10-26 | 2006-02-01 | 泰安市利德容器制造有限公司 | Smoke guard door |
| CN201866271U (en) * | 2010-11-30 | 2011-06-15 | 中冶北方工程技术有限公司 | Bellow butterfly valve with wear resistance for sintering machine |
| CN102705853A (en) * | 2012-07-03 | 2012-10-03 | 山东国舜建设集团有限公司 | Stainless steel-coated baffle plate door |
| CN105605232A (en) * | 2016-03-01 | 2016-05-25 | 江苏长隆圣宏冶金设备制造有限公司 | Pressure-sealing damper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106090970A (en) | 2016-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106090970B (en) | A kind of desulphurization fume baffle door and blade | |
| CN206830921U (en) | A kind of automatic exhaust steam valve | |
| CN206072371U (en) | A kind of air-valve with flexible sealing strip | |
| CN208652614U (en) | A kind of utilize takes out the anti-blocking air preheater that leaks out | |
| CN201476036U (en) | Flue gas desulphurization baffle door | |
| CN104180380B (en) | Electric isolating baffle door | |
| CN207609828U (en) | Fire resisting damper | |
| CN102705853A (en) | Stainless steel-coated baffle plate door | |
| CN2851743Y (en) | High velocity exhaust valve | |
| CN208058402U (en) | A kind of low pressure huge discharge Double-clack natural gas steam trap device | |
| CN208605627U (en) | A kind of revolution air preheater sealing device based on air motion attitude regulating technology | |
| CN207906461U (en) | Leafy ventilation butterfly valve | |
| CN206845948U (en) | Push-pull valve | |
| CN207229779U (en) | Corrosion-and high-temp-resistant gas regulation air door | |
| CN207229856U (en) | A kind of dead-weight fire resisting damper | |
| CN206468889U (en) | A kind of needle valve | |
| CN202660582U (en) | Stainless steel coated baffle plate door | |
| CN207112849U (en) | Smoke-heating device | |
| CN101613024B (en) | Breathing apparatus for normal pressure storage tank | |
| CN206637075U (en) | A kind of anti-jamming fire resisting damper of high-air-tightness | |
| CN206072442U (en) | A kind of axial-flow type high temperature adjustable valve group | |
| CN205226393U (en) | Novel fire -resistant manual isolation blast gate | |
| CN215766538U (en) | High leakproofness's gas-tight baffle door for power station desulfurization | |
| CN217056367U (en) | Balanced type heating and ventilating valve | |
| CN219510125U (en) | Desulfurizing GGH sealing transformation structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |