CN202812254U - Novel connecting structure for valve shaft and valve plate of butterfly valve - Google Patents
Novel connecting structure for valve shaft and valve plate of butterfly valve Download PDFInfo
- Publication number
- CN202812254U CN202812254U CN 201220386567 CN201220386567U CN202812254U CN 202812254 U CN202812254 U CN 202812254U CN 201220386567 CN201220386567 CN 201220386567 CN 201220386567 U CN201220386567 U CN 201220386567U CN 202812254 U CN202812254 U CN 202812254U
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- valve
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- valve plate
- spline
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Abstract
The utility model belongs to the valve equipment technology field, particularly relates to a novel connecting structure for valve shaft and valve plate of a butterfly valve. A spline valve portion is arranged at the front end of the valve shaft. Spline holes which are matched with the spline valve portion are positioned in the center of the valve plate. The length of the spline valve portion is longer than that of the spline hole. The connecting structure is characterized in that the design is novel; the valve plate can move along the valve shaft after installation, thereby the valve plate only bears the turning torque of the valve shaft, and the inner ring of the seal ring can center automatically. Therefore the valve plate does not transmit the destructive stress of the valve shaft, the abrasion against the seal ring can be reduced, the sealing reliability can be increased, and the working life of the valve can be prolonged. The connecting structure is easy to be detached, and the scrappage of the whole valve and the source waste are reduced.
Description
Technical field
The utility model belongs to the valve device technical field, relates in particular to a kind of butterfly valve shaft and valve plate new Joining Structure.
Background technique
Butterfly valve claims again Flap valve, is a kind of modulating valve simple in structure, also can be used for the switch control of low pressure pipeline medium simultaneously.Butterfly valve is to rotate to reach a kind of valve of open and close as the circular valve plate of open-shut device around valve shaft, and main rising cut off and throttling action on pipeline.Butterfly valve is applicable to carry on the pipeline of various corrosivity, non-corrosive fluids medium in the engineering systems such as producer, coal gas, rock gas, liquefied petroleum gas (LPG), town gas, cold and hot air, chemical industry smelting and generation environment-friendly, is used for regulating and blocking flowing of medium.Fig. 1 has namely showed the concrete structure of butterfly valve commonly used, comprise valve seat 3, one-body molded on valve seat 3 have a connecting body, be provided with flange 1 in the end of connecting body, valve shaft 2 is positioned at connecting body, its upper end is stretched out for parts, its lower ends such as connecting hand lever and is provided with circular valve plate 5, valve plate 5 rotates under the drive of valve shaft 2, opens or close butterfly valve.In the prior art, valve shaft 2 and valve plate 5 generally is fixed together by the modes of riveted joint, is about to valve shaft 2 and inserts in the axis hole at valve plates 5 centers, calculates behind the good position side perforating in valve plate 5 laterals, then adopts rivet 6 that both are riveted together.There is following defective in this kind linkage structure: at first, because valve shaft 2 and valve plate 5 are fixed together, the external force that is subject to of valve shaft 2 can be conducted to valve plate 5 like this, and then 5 pairs of valve seats of valve plate 3 produce stress, time has grown valve seat 3 and the phenomenons such as wearing and tearing can occur seal ring 4, cause phenomenon poorly sealed, that the life-span descends, reduced reliability, increased maintenance cost; Secondly, the component of this type of valve dismounting difficulty is large, and the whole scrappage of valve is higher, and this has caused the waste of resource.
The model utility content
The utility model provides the new Joining Structure of a kind of valve shaft and valve plate for solving the technical problem that exists in the known technology, the scrappage of the sealing reliability of lifting butterfly valve, reduction maintenance maintenance cost, reduction valve.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is: butterfly valve shaft and valve plate new Joining Structure, front end at valve shaft is provided with splined shaft section, be provided with the splined hole that matches with described splined shaft section at the center of described valve plate, the length of described splined shaft section is greater than the length of splined hole.
Its advantage and good effect are: valve shaft of the present utility model and valve plate linkage structure are novel in design, and traditional fixed design modification is designed for free-standing, are guaranteeing that the basis that moment obtains effective communication brought many advantages.After the installation, valve plate can be mobile at valve shaft, so it bears the moment of rotation of valve shaft, can self-alignment in the inner circle of seal ring, therefore, valve plate does not transmit the destructive stress of valve shaft, reduce wearing and tearing to seal ring, promoted the reliability of sealing, promoted simultaneously the working life of valve.This kind linkage structure is dismantled easily, has promoted the convenience of maintenance maintenance, has reduced the whole scrappage of valve, has reduced the waste of resource.
Preferably: described spline is rectangular spline.
Preferably: described spline is involute splines.
Description of drawings
Fig. 1 is the structural representation of butterfly valve;
Fig. 2 is the valve shaft of butterfly valve in the prior art and the Placement structural drawing of valve plate;
Fig. 3 is the valve shaft of butterfly valve in the utility model and the Placement structural drawing of valve plate;
Fig. 4 is the longitudinal section of Fig. 3;
Fig. 5 be among Fig. 3 A-A to sectional view.
Among the figure: 1, flange; 2, valve shaft; 3, valve seat; 4, seal ring; 5, valve plate; 6, rivet.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
Fig. 1 is the structural representation of butterfly valve in the prior art, can find out that butterfly valve comprises valve seat 3, and a topic forms connecting body on valve seat 3, is provided with flange 1 on the top of connecting body, and above structure is generally obtained by casting technique.Valve seat 3 is generally circle, and side is inlaid with seal ring 4 within it.Valve shaft 2 is positioned at connecting body, and the lower end is provided with circular valve plate 5, and valve plate 5 rotates under the drive of valve shaft 2, opens or close butterfly valve.
Fig. 2 is the structural representation of valve shaft 2 and the Placement of valve plate 5 in the prior art.In the prior art, valve shaft 2 is connected and fixed with the valve plate 5 general modes of riveted joint that adopt, and is about to valve shaft 2 and inserts in the axis hole at valve plates 5 centers, calculates behind the good position side perforating in valve plate 5 laterals, then adopts rivet 6 that both are riveted together.This kind mode exists the defectives such as dismounting is inconvenient, sealing reliability is low, working life is low owing to be fixed connection.
See also Fig. 3 to Fig. 5, linkage structure of the present utility model is: the front end at valve shaft 2 is provided with splined shaft section, is provided with the splined hole that matches with splined shaft section at the center of valve plate 5, and wherein the length of splined shaft section is greater than the length of splined hole.Particularly, splined hole can be set from the center of valve plate 5 to edge, namely length is the radius value of valve plate 5; The length that the splined shaft section of valve shaft 2 front ends is set slightly is longer than the radius value of valve plate 5, like this after valve is finished installation, valve plate 5 has had self centering ability in the inner circle of seal ring 4 owing to moving at valve shaft 2, be that 5 of valve plates are accepted the moment of rotation of valve shaft 2 and do not accepted any axial power, so just can not occur in the problem that produces in the situation of fixed connection.Typical advantage is: in long-term the use, valve still can keep higher sealing reliability and working life, and each parts of valve dismantle easily, has reduced difficulty and cost, the whole scrappage when having reduced the valve dismounting of maintenance maintenance.
Claims (3)
1. a butterfly valve shaft and valve plate new Joining Structure, it is characterized in that: the front end at valve shaft (2) is provided with splined shaft section, center at described valve plate (5) is provided with the splined hole that matches with described splined shaft section, and the length of described splined shaft section is greater than the length of splined hole.
2. according to butterfly valve shaft claimed in claim 1 and valve plate new Joining Structure, it is characterized in that: described spline is rectangular spline.
3. according to butterfly valve shaft claimed in claim 1 and valve plate new Joining Structure, it is characterized in that: described spline is involute splines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386567 CN202812254U (en) | 2012-08-06 | 2012-08-06 | Novel connecting structure for valve shaft and valve plate of butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386567 CN202812254U (en) | 2012-08-06 | 2012-08-06 | Novel connecting structure for valve shaft and valve plate of butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202812254U true CN202812254U (en) | 2013-03-20 |
Family
ID=47871124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220386567 Expired - Fee Related CN202812254U (en) | 2012-08-06 | 2012-08-06 | Novel connecting structure for valve shaft and valve plate of butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202812254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832665A (en) * | 2015-04-10 | 2015-08-12 | 阀安格水处理系统(太仓)有限公司 | Spline type butterfly plate connecting structure |
-
2012
- 2012-08-06 CN CN 201220386567 patent/CN202812254U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832665A (en) * | 2015-04-10 | 2015-08-12 | 阀安格水处理系统(太仓)有限公司 | Spline type butterfly plate connecting structure |
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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: 20130320 Termination date: 20130806 |