CN201228772Y - Improved three eccentric butterfly valve - Google Patents
Improved three eccentric butterfly valve Download PDFInfo
- Publication number
- CN201228772Y CN201228772Y CNU2008200773847U CN200820077384U CN201228772Y CN 201228772 Y CN201228772 Y CN 201228772Y CN U2008200773847 U CNU2008200773847 U CN U2008200773847U CN 200820077384 U CN200820077384 U CN 200820077384U CN 201228772 Y CN201228772 Y CN 201228772Y
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- valve
- butterfly
- valve body
- bearing
- improved
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Abstract
The utility model provides an improved three-eccentric butterfly valve, which basically comprises a valve body and a butterfly plate, valve stems at two ends of the butterfly plate support inside of a bearing support device on the valve body rotationally, sealing between the butterfly plate and the valve body can be realized via an coaxial pyramid surface seal pair. The improved three-eccentric butterfly valve is characterized in that the bearing support device utilizes a multi-point supporting structure, namely utilizing a plurality of bearings which are arranged along the valve stems at intervals. The utility model has the advantage that as the supporting structure of the valve stems are changed from single-point support of single bearing into multi-point support of multiple bearings, supporting is prolonged significantly, thereby effectively avoiding flexible deformation of the valve stems, preventing the butterfly plate from drooping, and increasing repeated location accuracy of open-and-close motion of the butterfly plate.
Description
Technical field
The utility model relates to a kind of improved three eccentric butterfly valve, is particularly useful for large-diameter butterfly valve, belongs to industrial valve technology field.
Background technique
Traditional double eccentric butterfly valve is eliminated gradually owing to open shortcomings such as the big energy consumption of moment is big, the substitute is and opens the little three eccentric butterfly valve of moment.Three core shift butterfly valves have valve body in constituting, butterfly plate etc., and butterfly plate is supported in the valve body by the valve rod rotation at two ends.At present, the supporting structure of valve rod is single strong point structure, both the valve rod support zone only was provided with single one and slided or rolling bearing, when butterfly circular diameter less when valve aperture, butterfly plate is eccentric, the single support of this kind can also be satisfied steady support butterfly plate and guarantee the usage requirement of its normal rotation, when valve is a large bore valves, when the butterfly circular diameter of butterfly plate was bigger than normal, the problem that rigidity of support is poor, valve rod is prone to the flexible deformation just appearred in the single supporting structure of this kind.Valve rod self rotational resistance increased when the flexible deformation acquired a certain degree, simultaneously also cause butterfly plate sagging, be difficult to drive the butterfly plate rotation especially, butterfly plate is opened and closed be difficult to accurately put in place, particularly oppositely difficult sealing has influence on the sealing effect of valve and the rate-of flow under the opening state to put in place.Flexible deformation's problem of valve rod needs to be resolved hurrily in the heavy caliber three eccentric butterfly valve.
Summary of the invention
The purpose of this utility model is to provide a kind of improved three eccentric butterfly valve, makes its running lighter to eliminate the valve rod flexible deformation.
The technical solution of the utility model is achieved in that this improved three eccentric butterfly valve, basic structure comprises: valve body, butterfly plate, the valve rod at butterfly plate two ends rotates in the bearing support assembly that is supported on the valve body, realize sealing by the eccentric coaxial tilted conical surface sealing pair that is provided with between butterfly plate and the valve body, it is characterized in that, described bearing support assembly adopts the multi-point support structure, and promptly the quantity of bearing is a plurality of, and a plurality of bearings are intervally arranged along valve rod.
Described improved three eccentric butterfly valve, described number of bearings is two, the involutory structural type of subdivision in the middle of support housing-case in the described bearing support assembly adopts, the front end of preceding housing-case wherein is connected with valve body, tail end docks by flange plate between the housing-case with the back, fore bearing in the two bearings is arranged in preceding housing-case, rear bearing is arranged in the placement hole that housing-case outer end, back coupling is provided with, and the fore bearing tail end has interstage sleeve.
Described improved three eccentric butterfly valve, described butterfly plate bilateral symmetry are set up prismatic and are strengthened gusset, cover cover plate on the prismatic stiffening rib of both sides.
Described improved three eccentric butterfly valve in the described coaxial tilted conical surface sealing pair, is set up Ω shape seal ring on the sealing tilted conical surface of valve body.
The improved three eccentric butterfly valve of the utility model, compared with prior art technological progress effect shows:
1, the supporting structure of valve rod by the single-point of single bearing support change the multi-point support of a plurality of bearings into after, support is prolonged significantly, so can effectively avoid reducing the flexible deformation of valve rod, and avoid the sagging of butterfly plate, improve the repetitive positioning accuracy that butterfly plate opens and closes motion;
When 2, supporting middle subdivision that housing-case adopts in the multi-point support structure, made things convenient for the loading and unloading of a plurality of bearings to the suitable shape of structure, made things convenient for support housing-case processing reach with valve body between be connected;
3, the butterfly plate both sides can significantly reduce the structural strength of guaranteeing and improve it under the butterfly plate weight prerequisite to adopting after prismatic is strengthened gusset covering structure of cover plate form;
4, set up Ω shape seal ring on the interior tilted conical surface of valve body after, can guarantee reliable sealing between butterfly plate and the valve body also can reduce unlatching moment simultaneously by Ω shape seal ring resiliently deformable.
Description of drawings
Fig. 1 is the sectional view of improved three eccentric butterfly valve along valve rod axis
Fig. 2 is the A-A sectional view of Fig. 1
Fig. 3 is a coaxial tilted conical surface sealing pair local I zoomed-in view among Fig. 2.
The component label is respectively in the accompanying drawing: 1-valve body, 2-butterfly plate, 3-valve rod, 4-preceding housing-case, 5-back housing-case, 6-flange plate, 7-fore bearing, 8-rear bearing, 9-interstage sleeve, 10-Ω shape seal ring, 11-prismatic are strengthened gusset, 12-cover plate, 13-sealing tilted conical surface, 14-worm gear.
Embodiment
Fig. 1, Figure 2 shows that improved three eccentric butterfly valve, valve body 1 is the pipe nipple tubular, the valve rod 3 of butterfly plate 2 left and right ends is supported in the bearing support assembly that valve body 1 left and right end coupling is provided with by bearing rotation, realizes sealing by the three eccentric coaxial tilted conical surface sealing pairs that are provided with between butterfly plate 2 and the valve body 1.Of the present utility modelly mainly be improved to, the bearing support assembly of valve rod 3 adopts multi-point support structural type, and promptly the quantity of bearing is a plurality of, and a plurality of bearings are intervally arranged and are placed in the bearing support assembly along valve rod 3 and support in the housing-case.
In embodiment illustrated in fig. 1, bearing adopts rolling bearing, quantity is two, support housing-case and adopt the involutory structural type of middle subdivision, the front end of preceding housing-case 4 wherein is connected with valve body 1, dock by the flange plate 6 that mates between tail end and the back housing-case 5, housing-case 4 couplings were provided with before fore bearing 7 in the two bearings was arranged in trepanning, rear bearing 8 are arranged in the placement hole that coupling is provided with on housing-case 5 exterior edge faces, back, and rear bearing 8 is pushed down by interstage sleeve 9 in forward and backward housing-case butt joint back.In the illustrated embodiment, the worm gear 14 in two valve rods on valve rod 3 external end heads of left end is for opening and closing the parts that are in transmission connection between transmission device and the valve rod.The carrying of fore bearing 7 is big than rear bearing 8, so fore bearing 7 can be selected the stronger rolling bearing than the macrostructure size of bearing capacity for use.
For improving the structural strength of major diameter butterfly plate, can symmetry set up prismatic reinforcement gusset 11 and cover cover plate 12 thereon on the inside and outside plate face of butterfly plate 2 shown in Figure 1.
Consulting butterfly valve 2 in Fig. 1,2 the utility model is prior art with three eccentric coaxial tilted conical surface sealing pairs between the valve body 1, repeat no more, being improved to aspect sealing pair, valve body 1 sealing tilted conical surface 13 on set up Ω shape seal ring 10, contact to forming elastic packing between the wave-shaped ring of outer lug and the butterfly plate.
The utility model listed examples is intended to further illustrate the structure shape of this improved three eccentric butterfly valve, and protection scope of the present invention is not constituted any restriction.
Claims (4)
1, a kind of improved three eccentric butterfly valve, basic structure comprises: valve body (1), butterfly plate (2), the valve rod at butterfly plate two ends (3) rotates in the bearing support assembly that is supported on the valve body, realize sealing by the eccentric coaxial tilted conical surface sealing pair that is provided with between butterfly plate and the valve body, it is characterized in that, described bearing support assembly adopts the multi-point support structure, and promptly the quantity of bearing is a plurality of, and a plurality of bearings are intervally arranged along valve rod (3).
2, according to the described improved three eccentric butterfly valve of claim 1, it is characterized in that, described number of bearings is two, the involutory structural type of subdivision in the middle of support housing-case in the described bearing support assembly adopts, the front end of preceding housing-case (4) wherein is connected with valve body (1), dock by flange plate (6) between tail end and back housing-case (5), the fore bearing in the two bearings (7) is arranged in preceding housing-case, rear bearing (8) and is arranged in afterwards the housing-case outer end and mates the placement hole of setting, and fore bearing (7) tail end has interstage sleeve (9).
According to claim 1 or 2 described improved three eccentric butterfly valves, it is characterized in that 3, described butterfly plate (2) bilateral symmetry is set up prismatic and strengthened gusset (11), covers cover plate (12) on the prismatic stiffening rib of both sides.
4, improved three eccentric butterfly valve according to claim 1 and 2 is characterized in that, in the described coaxial tilted conical surface sealing pair, sets up Ω shape seal ring (10) on the sealing tilted conical surface (13) of valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200773847U CN201228772Y (en) | 2008-05-29 | 2008-05-29 | Improved three eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200773847U CN201228772Y (en) | 2008-05-29 | 2008-05-29 | Improved three eccentric butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201228772Y true CN201228772Y (en) | 2009-04-29 |
Family
ID=40633722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200773847U Expired - Fee Related CN201228772Y (en) | 2008-05-29 | 2008-05-29 | Improved three eccentric butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201228772Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226472A (en) * | 2011-04-21 | 2011-10-26 | 昆山维萨阀门有限公司 | Three-eccentric hard sealed plug valve |
| CN105492812A (en) * | 2013-08-30 | 2016-04-13 | 伊万诺阀门（美国）有限公司 | Triple offset butterfly pressure relief valve |
-
2008
- 2008-05-29 CN CNU2008200773847U patent/CN201228772Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226472A (en) * | 2011-04-21 | 2011-10-26 | 昆山维萨阀门有限公司 | Three-eccentric hard sealed plug valve |
| CN105492812A (en) * | 2013-08-30 | 2016-04-13 | 伊万诺阀门（美国）有限公司 | Triple offset butterfly pressure relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20120529 |