CN2210981Y - Valve-stem head for preventing from stress concentration - Google Patents
Valve-stem head for preventing from stress concentration Download PDFInfo
- Publication number
- CN2210981Y CN2210981Y CN 95230072 CN95230072U CN2210981Y CN 2210981 Y CN2210981 Y CN 2210981Y CN 95230072 CN95230072 CN 95230072 CN 95230072 U CN95230072 U CN 95230072U CN 2210981 Y CN2210981 Y CN 2210981Y
- Authority
- CN
- China
- Prior art keywords
- valve
- head
- stem
- stem head
- utility
- 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 - Fee Related
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- Lift Valve (AREA)
Abstract
The utility model discloses a valve-stem head for preventing from stress concentration, which belongs to the lift valve field. The valve-stem head is characterized in that the variable diameter portion of the valve stem and the valve head is a large-size concave circular arc. The utility model has the advantages that the valve-stem head has the functions of preventing from stress concentration and enhancing the integral intensity of cross sections; the performance of the mechanical fatigue damage resistance of the valve stem can be increased; consequently, the service life of the device can be prolonged; the safe process of production can be ensured. The utility model is suitable for valve doors with high load and frequent movement.
Description
The stem head that a kind of anti-stress is concentrated belongs to the poppet valve field.
In the prior art, the valve rod of valve and valve head reducing place are the right angle step transition, and be stressed when frequent when the stressed excessive or to-and-fro motion of valve owing to exist wedge angle stress to concentrate at the reducing place, just very easily cracks at this place, even disconnect.What have designs a spill camber line groove at the reducing place, as shown in Figure 2, because groove both had been difficult for accurately processing, not being easy to do again overhauls, thereby is difficult to ensure the quality of products, and the groove radius of arc is too little, reduced this place's effective cross-sectional area, reduced the intensity at this position of valve rod, thus the time have phenomenon of rupture to take place, influence production safety.
The purpose of this utility model just provides the stem head that a kind of anti-stress is concentrated, and it can prevent that stress is concentrated, increases the performance of the anti-mechanical fatigue damage of valve rod.
The purpose of this utility model is achieved in that the stem head that a kind of anti-stress is concentrated, and comprises valve rod, valve head, and the reducing place that it is characterized in that valve rod and valve head is a large scale spill arc transition.
The utility model has the advantages that because valve head and valve rod place are large scale spill arc transition, so make stem head have the function that the cross section bulk strength was concentrated and improved to anti-stress, thereby can prolong the working life of equipment, guarantee that the safety of production is carried out.
Fig. 1 is the utility model structural representation.
Fig. 2 is the structural representation of camber line groove for stem head reducing place.
Below in conjunction with accompanying drawing the utility model is described in further details.
The utility model comprises valve rod 1, valve head 4, at the reducing place of valve rod 1 and valve head 4 a large scale spill circular arc 2 is arranged, and has so both increased this place's effective cross-sectional area, makes stress distribution even again.During work, when stem head moved up and down, cambered surface was stressed, and stress is disperseed, thereby can significantly improve the working strength and the antifatigue damage performance at this position, avoided fracture accident to take place, and guaranteed that the safety of production is carried out.
On large scale spill circular arc 2, add the cover one activity cambered surface packing ring 3 that matches with cambered surface, can avoid like this sustaining damage because of the circular arc cambered surface and the flap inner hole wall generation bite of valve rod.
The utility model is applicable to the valve (as steam turbine speed control porthole etc.) of high loading frequent movement.
Claims (2)
1, the concentrated stem head of a kind of anti-stress comprises valve rod (1), valve head (4), it is characterized in that the valve rod (1) and the reducing place of valve head (4) are large scale spill circular arc (2) transition.
2, the concentrated stem head of anti-stress according to claim 1 is characterized in that locating to add cover one packing ring (3) that matches with its cambered surface at large scale spill circular arc (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95230072 CN2210981Y (en) | 1995-01-14 | 1995-01-14 | Valve-stem head for preventing from stress concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95230072 CN2210981Y (en) | 1995-01-14 | 1995-01-14 | Valve-stem head for preventing from stress concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2210981Y true CN2210981Y (en) | 1995-10-25 |
Family
ID=33875001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95230072 Expired - Fee Related CN2210981Y (en) | 1995-01-14 | 1995-01-14 | Valve-stem head for preventing from stress concentration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2210981Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937190A (en) * | 2012-11-16 | 2013-02-20 | 无锡智能自控工程股份有限公司 | Ultra-large-diameter material switch angle valve |
| CN104999016A (en) * | 2015-07-28 | 2015-10-28 | 湖北钱潮精密件有限公司 | Cutting connection push rod structure in cold header and machining method thereof |
| CN113932022A (en) * | 2018-07-06 | 2022-01-14 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| CN114135680A (en) * | 2018-04-04 | 2022-03-04 | 株式会社鹭宫制作所 | Electric valve |
-
1995
- 1995-01-14 CN CN 95230072 patent/CN2210981Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937190A (en) * | 2012-11-16 | 2013-02-20 | 无锡智能自控工程股份有限公司 | Ultra-large-diameter material switch angle valve |
| CN104999016A (en) * | 2015-07-28 | 2015-10-28 | 湖北钱潮精密件有限公司 | Cutting connection push rod structure in cold header and machining method thereof |
| CN114135680A (en) * | 2018-04-04 | 2022-03-04 | 株式会社鹭宫制作所 | Electric valve |
| CN114135680B (en) * | 2018-04-04 | 2024-05-03 | 株式会社鹭宫制作所 | Electric valve |
| CN113932022A (en) * | 2018-07-06 | 2022-01-14 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| CN113932022B (en) * | 2018-07-06 | 2023-12-19 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |