CN202510727U - High-temperature flap valve - Google Patents
High-temperature flap valve Download PDFInfo
- Publication number
- CN202510727U CN202510727U CN2012201274880U CN201220127488U CN202510727U CN 202510727 U CN202510727 U CN 202510727U CN 2012201274880 U CN2012201274880 U CN 2012201274880U CN 201220127488 U CN201220127488 U CN 201220127488U CN 202510727 U CN202510727 U CN 202510727U
- Authority
- CN
- China
- Prior art keywords
- axle
- valve body
- high temperature
- flap valve
- shaft
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Lift Valve (AREA)
Abstract
The utility model provides a high-temperature flap valve, which comprises a valve body 2, a flap plate 3. a shaft 4, a balance arm 5 and a balance block 6, wherein the shaft 4 is positioned at one side of the valve body 2 and passes through the valve body 2, and one end of the flap plate 3 is fixedly connected with the shaft 4 and is arranged inside the valve body 2; two ends of the shaft 4 are respectively and fixedly connected with the balance arm 5, the balance block 6 is arranged on the balance arm 5 and a shaft sealing assembly 7 is arranged at the outer side of the connection part between the shaft 4 and the valve body 2; a shaft support assembly 8 is arranged at the outer side of the shaft sealing assembly 7 and is fixed on the valve body 2; and the shaft 4 rotates on a shaft support assembly (8). The high-temperature flap valve solves the technical problem of easy air-leakage between the shaft and the valve body and inflexible running of the shaft driving the flap plate and is particularly suitable for reductive gas negative-pressure and high-pressure environments.
Description
Technical field
The utility model relates to a kind of Flap valve, particularly a kind of heavy hammer type high temperature Flap valve.
Background technique
Flap valve is a kind of a kind of discharge mechanism of giving of industries such as metallurgy, building materials, cement, electric power, chemical industry that is widely used in, and its effect is mainly to be to prevent that air-flow from wrapping up in material and returning through turnover panel and valve body gap and scurry.Because application and applicable elements is different, the kind of Flap valve also varies.
Patent CN201795058U discloses a kind of adjustable type heavy hammer type lock wind Flap valve, and valve plate connects through valve shaft and is fixed in the valve body, connects adjustment type weight handle in the valve shaft outer end, on the weight handle, is fixed with weight, in order to the turnover panel that automatically resets.This Flap valve, owing to adopt heavy hammer type to automatically reset, reposition force is little, requiring all can have certain running clearance between axle and valve body, guarantee to go slick, and does not so just realize effectively sealing having the problem of leaking out; Especially, when the pipeline that is connected with Flap valve was negative pressure, the problem of leaking out became more serious; If but gas is oxidability in the Flap valve; Because of what bleed is air, influential for Flap valve composition of gases within and system energy consumption, to not influence of material performance; So roasting cement for example is not enough attention and being resolved of the problem of leaking out.
Yet, under a lot of service conditions, pass through Flap valve through the material of high temperature reduction roasting; And atmosphere is the reducibility gas of negative pressure in the Flap valve, and above-mentioned gas leakage problem becomes very outstanding, the ambient air of the valve body that bleeds automatically; With material in the severe contamination valve body, make its oxidation deterioration.The Flap valve that uses under these conditions, must thoroughly solve spool and valve body between sealing and the problem of leaking out that causes; Simultaneously, when problem is leaked out in solution, also can appear under the high temperature service condition, shaft distortion causes the axle problem alive that runs improperly.
So,, just be necessary to develop a Flap valve that goes slick of good seal performance between a kind of axle and the valve body, drive turnover panel along with the expansion of Flap valve application and applicable elements.
Summary of the invention
The purpose of the utility model provides a kind of high temperature Flap valve, to solve the technical problem alive that spool runs improperly that is prone to leak out, drives turnover panel between axle and the valve body.
For realizing above-mentioned purpose, provide a kind of high temperature Flap valve to comprise according to the utility model: valve body, turnover panel, axle, balance arm and equilibrium block, axle is positioned at a side of valve body and passes valve body; One end of turnover panel is fixedly connected and is arranged in the valve body with axle; The axle two ends are fixedly connected with balance arm respectively, and equilibrium block is arranged on the balance arm, and the high temperature Flap valve also comprises shaft seal assembly and axle supporting component; Shaft seal assembly is arranged on outside axle and the joint of valve body; The axle supporting component is arranged on the shaft seal assembly outside, is fixed on the valve body, and axle rotates on the axle supporting component.
Further, shaft seal assembly comprises axle sleeve, baffle ring, packing, annular gland, holddown spring and spring block piece; Axle sleeve is nested with on axle, and is fixedly connected on the valve outer wall; Baffle ring and packing are between axle and axle sleeve, and baffle ring one side contacts with valve outer wall, a side contacts of baffle ring opposite side and packing, and the opposite side of packing contacts with annular gland, and the annular gland that is used to compress packing is arranged at the axle sleeve outer end; Holddown spring is arranged at the outside of annular gland, and holddown spring one end contacts with annular gland, and the other end of holddown spring contacts with the spring block piece; The spring block piece is arranged on the supporting component or is fixedly installed on the axle.
Further, the axle supporting component comprises cylindrical shell, flange plate and support roller; Cylindrical shell is fixedly installed on the outer wall of valve body, and flange plate is fixed in the cylindrical shell exterior edge face; Axle passes flange plate; At least two support rollers are arranged on the flange plate and are positioned at the below of axle, and are tangent with axle respectively, and axle rotates on support roller; The spring block piece is a flange plate.
Further, the high temperature Flap valve also comprises the cover black box, and the cover black box is arranged on the periphery of shaft seal assembly, axle supporting component, balance arm and equilibrium block; The cover black box is fixed on the outer wall of valve body; The cover black box comprises cover body, seal ring and cover cap.
Further, valve body and supply pipe join, and the distance of the center line of axle and the center line of supply pipe is 1.1～2.5 times of supply pipe radius.
Further, high temperature resistant dividing plate is set in valve body, its high-temperature zone with axle and high-temperature material whereabouts separates.
Further, on the cover cap form is set.
The utlity model has following beneficial effect:
The utility model increase of the position outside the joint of axle and valve body on the one hand is provided with shaft seal assembly, is arranged on " outside, joint ", like this; Enough free spaces are arranged; Be convenient to select sealing means, reach sealing effect, convenient for maintaining; Having staggered simultaneously also is provided with a supporting piece structure in that the shaft seal assembly position is set, and the convenient ambient air that solves is through bleed the automatically problem of atmosphere in the valve body change valve body of the gap of axle and valve body; On the other hand; The axle supporting component is arranged on the outside of shaft seal assembly individually; Rather than be arranged on valve body with the axle the joint; Help like this reducing by deriving the heat of coming influence to unofficial biography in the valve body, thereby make a supporting element guarantee that axle rotates flexibly, solved same position simultaneously and should look after the sealing of axle and take into account the rotation of the axle space-constrained problem when flexible again the axle supporting element; Only need to solve the problem of rotating flexibly when axle supports separately, reduced design, the difficulty of processing of axle supporting component.
Further, the shaft seal assembly in the utility model adopts holddown spring to apply the axial pressure of pointing to valve body to annular gland; Compress packing; The sealing load of shaft seal assembly is regulated by holddown spring automatically, has solved in the using process of Flap valve, causes the problem of sealing effect variation along with the wear and aging problem of packing; Realized axle and valve body stably, sealing reliably, therefore have in the good advantage of high temperature condition seal performance.
Further, the utility model is provided for the plural support roller of back shaft on the flange plate on the axle supporting element, and support roller is tangent with axle; Two support rollers point to the axle center to the power of axle, and the axle center of axle is not fixed extremely, and axle just can not move vertically downward; The degrees of freedom that also has other directions is provided with like this, and the heat of hot environment passes to axle and support roller in valve body; When causing the little distortion of axle and support roller, axle the jam problem can not occur with the axle supporting component, helps axle and rotates flexibly.
Further; In the periphery of axle supporting component, balance arm and equilibrium block the cover black box is set, when leaking out on a small quantity appears in shaft seal assembly, shaft seal assembly, axle supporting component, balance arm and equilibrium block is enclosed within the environment of a sealing by the cover black box; Avoided ambient air constantly to bleed in a steady stream in the valve body; Leak out on a small quantity even shaft seal assembly occurs, also will leak out a little and ambient air is kept apart, therefore further realize spool thorough sealing with valve body by the cover black box.
Further, the distance of the center line of the utility model axle and the center line of supply pipe is 1.1～2.5 times of supply pipe radius, like this; Depart from the material feeding mouth position axle is set, make that the length of turnover panel is longer, promptly the turnover panel arm of force is longer; On the one hand axle is away from the blanking high-temperature zone, reduced the distortion that receives the axle that the high-temperature material radiation heat causes, the axle that drives turnover panel rotates sensitiveer; The arm of force of turnover panel is longer on the other hand, stirs the frequency height, the blanking good dispersion; But distance can not be too big, is unfavorable for the flexible rotation of turnover panel and the sealing of material gas too greatly.
One high temperature resistant dividing plate is set in the valve body, axle and the high-temperature zone that has high-temperature material to fall are separated, reduce the distortion that receives from high-temperature material radiation heat influence the causing axle of valve body material feeding mouth whereabouts.
One form is set, so that keep watch on balance arm and equilibrium block working condition in the cover black box on the cover cap.
Except top described purpose, feature and advantage, the utility model also has other purpose, feature and advantage.To do further detailed explanation to the utility model with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the schematic top plan view of the preferred high temperature Flap valve of the utility model;
Fig. 2 is the front elevational schematic of the preferred high temperature Flap valve of the utility model;
Fig. 3 is the partial enlarged drawing of shaft seal assembly 7 among Fig. 1;
Fig. 4 be among Fig. 1 A-A to schematic representation; And
Fig. 5 is the partial enlarged drawing schematic representation of Fig. 1 axis supporting component 8;
Reference character among the figure: 1, supply pipe; 2, valve body; 3, turnover panel; 4, axle; 5, balance arm; 6, equilibrium block; 7, shaft seal assembly; 8, axle supporting component; 9, cover black box; 10, dividing plate; 71, baffle ring; 72, graphite packing; 73, annular gland; 74, axle sleeve; 75, holddown spring; 76, spring block piece; 81, cylindrical shell; 82, flange plate; 83, support roller; 84, stove bolt; 85, king-bolt; 91, cover body; 93, cover cap, 931, form.
Embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Like Fig. 1 the utility model a kind of high temperature Flap valve is provided, this high temperature Flap valve is connected to supply pipe 1 mutually, and it comprises valve body 2, turnover panel 3, axle 4, balance arm 5, equilibrium block 6, shaft seal assembly 7 and axle supporting element 8.Axle 4 is positioned at a side of valve body 2 and passes valve body 2, and an end of turnover panel 3 is fixedly connected and is arranged at valve body 2 inside with axle 4, and the two ends of axle 4 are fixedly connected with a balance arm 5, and equilibrium block 6 is arranged on the balance arm 5 through the bolt adjustable ground; Shaft seal assembly 7 is arranged on the outside, joint of axle 4 two ends and valve body 2, and axle supporting component 8 is arranged on shaft seal assembly 7 outsides, is fixed on the valve body 2, and axle 4 rotates on axle supporting component 8.
The position that the utility model is employed in axle and the outside, the joint of valve body increases shaft seal assembly is set, rather than simple Sealing, and is arranged on " outside the joint "; Like this, on the one hand free space is arranged, be convenient to select sealing means; Reach sealing effect, convenient for maintaining; Simultaneously, having staggered also is provided with a supporting piece structure in that the shaft seal assembly position is set, and the convenient ambient air that solves is through bleed the automatically problem of atmosphere in the valve body change valve body of the gap of axle and valve body; On the other hand; The axle supporting component is arranged on the outside of shaft seal assembly individually; Rather than be arranged on the joint of valve body and valve shaft; Help like this reducing by deriving the influence of the high temperature that comes to unofficial biography in the valve body, thereby make a supporting element guarantee that a valve shaft rotates flexibly, solved same position simultaneously and should look after the sealing of axle and take into account the rotation of the axle space-constrained problem when flexible again the axle supporting element; Only need to solve the problem of rotating flexibly when axle supports separately, reduced design, the difficulty of processing of axle supporting component.
Like Fig. 3, shaft seal assembly 7 comprises axle sleeve 74, baffle ring 71, packing 72, annular gland 73, holddown spring 75 and spring block piece 76; Its Intermediate shaft sleeve 74 is nested with on axle 4; And seal weld is connected on valve body 2 outer walls, and baffle ring 71 and packing 72 are between axle 4 and axle sleeve 74, and baffle ring 71 1 sides contact with valve body 2 outer walls; One side contacts of baffle ring 71 opposite sides and packing 72; The opposite side of packing 72 contacts with annular gland 73, and annular gland 73 is a structure with the level, and the stepped portions that is used to compress the annular gland 73 of packing 72 is arranged at axle sleeve 74 outer ends; Holddown spring 75 is arranged at the outside of annular gland 73; Holddown spring 75 1 ends contact with annular gland 73, and the other end of holddown spring 75 contacts with spring block piece 76, and spring block piece 76 is fixedly installed on the axle 4; Spring block piece 76 also can directly utilize flange plate 82; Dwindle the distance between shaft seal assembly 7 and the axle supporting component 8 so to greatest extent, help dwindling the length of axle 4 outside valve body 2, reduce the manufacture difficulty and the cost of axle 4.
Because after shaft seal assembly 7 long-time uses, deterioration phenomenon occurs, particularly packing a period of time is used the meeting wearing and tearing, thereby causes annular gland 73 can reduce its preload pressure, black box occurs loosening, the phenomenon of shaft sealing deleterious; Impose the structure of axial pressure in advance when the utility model shaft seal assembly 7 adopts holddown spring to install annular gland 73; Make annular gland 73 compress the packing 72 in the axle sleeve 74; Utilize the sealing means of spring compression, in time the compensating disc root timber material pressure that loss causes in long-time using process reduces, and realizes the automatic adjusting that annular gland 73 sealings compress; Avoid the decrement that black box 7 problem of aging cause to reduce phenomenon, realize reliably, sealing effect stably.
The utility model adopt graphite to be as the packing material because; The graphite packing has good compressible performance to be suitable as Sealing, and particularly under high temperature and reducing atmosphere, the graphite packing is difficult for oxidation with aging; Prolong working life; Directly touch with frequent being coupling of rotating when the graphite packing uses on the one hand in addition, itself helps improving the going slick property and the working life thereof of axle as a kind of antifriction self-lubricating material.
In conjunction with Fig. 1, Fig. 4 with like Fig. 5; Axle supporting component 8 is arranged on the outside of shaft seal assembly 7; The axle supporting element comprises cylindrical shell 81, flange plate 82 and support roller 83, and on the outer wall that is welded on valve body 2 of cylindrical shell 81, flange plate 82 is fixed in cylindrical shell 81 exterior edge faces through stove bolt 84; Axle 4 passes flange plate 82; At least two support rollers 83 are arranged on the flange plate 82 and are positioned at the below of axle 4, and are tangent with axle 4 respectively, and axle 4 is running on support roller 83.
8 employings of axle supporting component are arranged on two support rollers 83 arranged side by side in the same plane and are used for holding up 4, two support rollers of axle 83 and axle 4 tangent settings on the flange plate 82 through king-bolt 85, the mode that is nested with on axle with respect to the employing bearing is provided with; Two support rollers point to the axle center to the power of axle, and the axle center of axle is not fixed extremely, and axle just can not move vertically downward; The degrees of freedom that also has other directions; Axle has the leeway of small size motion, like this, can guarantee 83 pairs of axle 4 supporting effects of support roller on the one hand; Can avoid turnover panel 3 on the other hand in long operation process, because the situation that axle 4 jams that high temperature or other factors cause perhaps run improperly alive takes place.
The axle supporting component can also be arranged at the bearing between axle 4 and the valve body 2 except above-mentioned mode.
Preferably, spring block piece 76 is set directly on the supporting component 8, is flange plate 82.Here; Flange plate 82 is except the installation that is used for support roller 83; Its another one effect can be made the spring block piece 76 in the shaft seal assembly 7, makes holddown spring 75 produce an axial pressure, to compress gland 73; Placement is that holddown spring 75 1 ends contact with annular gland 73, and the other end and flange plate 82 are near a side contacts of valve body 2.
Preferably; Cover black box 9 is set in the periphery of axle supporting component 8, balance arm 5 and equilibrium block 6, and cover black box 9 is fixedly installed on the outer wall of valve body 2, and cover black box 9 is detachable; Comprise cover body 91, seal ring and cover cap 93; Cover body 91 is connected through the seal ring (not shown) with cover cap 93, and the setting of cover black box 9 can further strengthen the sealing effect of axle 4 and valve body 2, avoids shaft seal assembly 7, axle supporting component 8, balance arm 5 and equilibrium block 6 to be exposed in the air; Thereby more effectively realize the sealing of axle 4 and valve body 2, guarantee that atmosphere in the valve body 2 and the material that gets off from supply pipe 2 are not contaminated.
Preferably, axle 4 is arranged on the outside of supply pipe 1 tube wall, and valve body 2 joins with supply pipe 1; The distance of the center line of axle 4 and the center line of supply pipe 1 is 1.1～2.5 times of supply pipe 1 radius, like this, can make axle away from the blanking high-temperature zone on the one hand; Reduced axle 4 and received that high-temperature material is photothermal to be influenced; Make that axle 4 not yielding rotations are more flexible, the situation of having avoided axle 4 jam to occur or run improperly alive because of distortion takes place, and the arm of force of turnover panel 3 is longer on the other hand; Stir the frequency height, the blanking good dispersion; But distance can not be too big, makes that too greatly the turnover panel quality is overweight, and area is excessive, is unfavorable for the flexible rotation and the material hermetic seal of turnover panel equally.
Preferably, high temperature resistant dividing plate 10 is set in valve body 2, axle 4 and the high-temperature zone that has high-temperature material to fall are separated, be used to reduce high-temperature material causes axle 4 to the heat transmission of axle distortion, avoid being out of shape and cause leaking out of 2 of axle 4 and valve bodies.
Preferably, form 931 is set on the cover cap 93, so that keep watch on balance arm 5 and the working condition of equilibrium block 6 in cover black box 9.
In sum; The utility model can solve between existing turnover panel valve shaft and the valve body sealing bad, be prone to leak out and the axle yielding problem alive that runs improperly of being heated; Have the effect that good seal performance, simplicity of design, turnover panel and axle go slick, be specially adapted to reducibility gas negative pressure and hot environment.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (8)
1. high temperature Flap valve; Comprise valve body (2), turnover panel (3), axle (4), balance arm (5) and equilibrium block (6); Said axle (4) is positioned at a side of said valve body (2) and passes said valve body (2); Said turnover panel (3) one ends are fixedly connected and are arranged in the said valve body (2) with said axle (4), and the two ends of said axle (4) are fixedly connected with said balance arm (5) respectively, and said equilibrium block (6) is arranged on the said balance arm (5); It is characterized in that the high temperature Flap valve also comprises shaft seal assembly (7) and axle supporting component (8);
Said shaft seal assembly (7) is arranged on the outside, joint of said axle (4) and said valve body (2);
Said axle supporting component (8) is arranged on said shaft seal assembly (7) outside, is fixed on the said valve body (2), and axle (4) is gone up at said axle supporting component (8) and rotated.
2. high temperature Flap valve according to claim 1 is characterized in that, said shaft seal assembly (7) comprises axle sleeve (74), baffle ring (71), packing (72), annular gland (73), holddown spring (75) and spring block piece (76), wherein,
Said axle sleeve (74) is nested with on said axle (4), and is fixedly connected on valve body (2) outer wall;
Said baffle ring (71) and said packing (72) are positioned between said axle (4) and the said axle sleeve (74); Said baffle ring (71) one sides contact with said valve body (2) outer wall; One side contacts of said baffle ring (71) opposite side and said packing (72); The opposite side of said packing (72) contacts with said annular gland (73), and the said annular gland (73) that is used to compress said packing (72) is arranged at said axle sleeve (74) outer end;
Said holddown spring (75) is arranged at the outside of said annular gland (73), and said holddown spring (75) one ends contact with said annular gland (73), and the other end of said holddown spring (75) contacts with said spring block piece (76);
Said spring block piece (76) is arranged on said axle supporting component (8) and goes up or be fixedly installed on the said axle (4).
3. high temperature Flap valve according to claim 1 and 2; It is characterized in that; Said axle supporting component (8) comprises cylindrical shell (81), flange plate (82) and support roller (83); Described cylindrical shell (81) is fixedly installed on the outer wall of said valve body (2), and said flange plate (82) is fixed in said cylindrical shell (81) exterior edge face;
Said axle (4) passes said flange plate (82);
At least two said support rollers (83) are arranged on the below that said axle (4) was gone up and be positioned to said flange plate (82), and are tangent with said axle (4) respectively, and said axle (4) is gone up at said support roller (83) and rotated.
4. high temperature Flap valve according to claim 3 is characterized in that, described spring block piece (76) is described flange plate (82).
5. high temperature Flap valve according to claim 1 and 2; It is characterized in that; The high temperature Flap valve also comprises cover black box (9), and said cover black box (9) is arranged on the periphery of said axle supporting component (8), said balance arm (5) and said equilibrium block (6);
Said cover black box (9) is fixed on the outer wall of said valve body (2);
Said cover black box (9) comprises cover body (91), seal ring and cover cap (93).
6. high temperature Flap valve according to claim 1 and 2 is characterized in that, said valve body (2) joins with supply pipe (1), and the distance of the center line of said axle (4) and the center line of said supply pipe (1) is 1.1～2.5 times of supply pipe (1) radius.
7. high temperature Flap valve according to claim 1 is characterized in that, high temperature resistant dividing plate (10) is set in the said valve body (2), and said axle (4) and the high-temperature zone that high-temperature material falls are separated.
8. high temperature Flap valve according to claim 5 is characterized in that, form (931) is set on the said cover cap (93).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201274880U CN202510727U (en) | 2012-03-30 | 2012-03-30 | High-temperature flap valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201274880U CN202510727U (en) | 2012-03-30 | 2012-03-30 | High-temperature flap valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202510727U true CN202510727U (en) | 2012-10-31 |
Family
ID=47063214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201274880U Expired - Lifetime CN202510727U (en) | 2012-03-30 | 2012-03-30 | High-temperature flap valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202510727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565404A (en) * | 2014-12-22 | 2015-04-29 | 中冶南方工程技术有限公司 | Non-driven automatic reset turning plate valve |
-
2012
- 2012-03-30 CN CN2012201274880U patent/CN202510727U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565404A (en) * | 2014-12-22 | 2015-04-29 | 中冶南方工程技术有限公司 | Non-driven automatic reset turning plate valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102057796B1 (en) | Rotary sealing mechanism | |
| CN207688630U (en) | A kind of atmosphere rotary furnace sealing device | |
| CN202510727U (en) | High-temperature flap valve | |
| CN107604969A (en) | Center-rotary joint and hydraulic crawler excavator | |
| CN103773399B (en) | Rotatable heater | |
| CN202251971U (en) | Sealing device for door shaft of air door of air duct of thermal power plant | |
| CN102478023A (en) | Fan adopting welded case | |
| CN201618582U (en) | Rubber flexible sealing device for middle-speed mill base | |
| CN206064592U (en) | A kind of medium-speed pulverizer support sealing device | |
| CN203413127U (en) | Dry gas seal device of pump double-end-face corrugated pipe | |
| CN206017724U (en) | A kind of novel rotation stove sealing device for being convenient for changing airtight and watertight padding | |
| CN214250531U (en) | Rotary kiln head sealing device | |
| CN203703128U (en) | Rotary kiln air channel sealing device and porous rotary kiln equipped with the same | |
| CN110792776A (en) | Non-contact flexible sealing structure for rotary air preheater | |
| CN203641514U (en) | Rotating shaft sealing device | |
| CN203255738U (en) | Novel air chamber sealing rotary feeder of rotary shaft | |
| CN207376687U (en) | Center-rotary joint and hydraulic crawler excavator | |
| CN109058458B (en) | Chemical converter feeding seal structure | |
| CN209926840U (en) | Sealing structure of rotary kiln | |
| CN203036672U (en) | Sealing mechanism of heat exchange partition bin in rotary air pre-heater | |
| CN202510412U (en) | Gas sealing device of main shaft of fan | |
| CN203717429U (en) | Compressor inlet flow adjusting and sealing structure | |
| CN211009891U (en) | Non-contact flexible sealing structure for rotary air preheater | |
| CN218935271U (en) | Coal feeder | |
| CN205640971U (en) | Closed batcher of box and coal fired boiler coal supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |
|
| CX01 | Expiry of patent term |