CN2429696Y - Butterfly gate with low moment - Google Patents
Butterfly gate with low moment Download PDFInfo
- Publication number
- CN2429696Y CN2429696Y CN 00241213 CN00241213U CN2429696Y CN 2429696 Y CN2429696 Y CN 2429696Y CN 00241213 CN00241213 CN 00241213 CN 00241213 U CN00241213 U CN 00241213U CN 2429696 Y CN2429696 Y CN 2429696Y
- Authority
- CN
- China
- Prior art keywords
- valve
- valve rod
- sliding york
- butterfly
- butterfly plate
- 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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Abstract
The utility model belongs to the technical field of a valve, particularly a butterfly valve with low force moment. The utility model is characterized in that the lower end of a valve rod is provided with a skewed slot and an eccentric straight slot parallel to the central line of the valve rod; the outer side of the lower end of the valve rod is provided with a sleeve yoke; the valve rod is penetrated between two forks of the sleeve yoke, and the valve rod is connected with the sleeve yoke through a slotted hole and a positioning pin; one end of the sleeve yoke is connected with a butterfly plate. The purpose of the utility model is to lower the operating force moment of the butterfly valve. The utility model has the advantages of convenient operation, labor saving, long service life, reliable sealing performance, etc.
Description
The utility model relates to valve technology field, particularly a kind of low-torque butterfly valve.
The Chinese patent communique discloses the inclined wedge type butterfly valve that a kind of patent No. is ZL98213459.2 on June 16th, 1999, it interacts by spiral chute on the valve rod and the anti-turn screw on the valve body, make butterfly plate before rotation, allow motive sealing face on the butterfly plate incline and realize reducing operational torque from valve seat.But this butterfly valve is owing to be subjected to the restriction of valve rod and butterfly plate linkage structure, and the spacing of in fact throwing off between the sealing surface is very little, under the condition of mesohigh, can't avoid the phase mutual friction between the sealing surface, and the off-load amount is also very little, and its operational torque is still bigger.
The purpose of this utility model is the low-torque butterfly valve of a kind of low operational torque of design.
In order to achieve the above object, the utility model adopts following technical solution: a kind of low-torque butterfly valve, comprise butterfly plate, valve rod, be provided with the straight trough that skewed slot and is parallel to the valve rod center line in the valve rod lower end, straight trough center line and valve rod center line have a throw of eccentric, and skewed slot is connected continuously with straight trough, the outside, valve rod lower end is provided with sliding york, valve rod passes between two bifurcateds of sliding york, and is connected with sliding york by slotted eye, locating stud, and sliding york one end is connected with butterfly plate.
During valve opening, valve rod upwards moves as straight line under the effect of prior art structure, and locating stud moves right along the relative valve rod center line of skewed slot, and by sliding york drive butterfly plate to Right deviation from, until the center line and the straight trough central lines of locating stud.Because it is bigger to be used to be provided with the spatial position of straight trough on the valve rod, straight trough can be located at apart from valve rod center line farthest, therefore, butterfly plate incline from displacement can reach maximum position, make the bigger distance of formation between the dynamic and static sealing surface, it not only makes valve can not have frictional rotation, and, after allowing it lay down the most of pressure of valve insertion earlier, butterfly plate is rotated open, greatly reduce the operational torque of valve.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is present embodiment main structure figure.
Fig. 2 is that Fig. 1 is along the A-A sectional drawing.
Fig. 3 is another structural drawing that valve rod is connected with sliding york in the present embodiment.
As Fig. 1, shown in Figure 2, present embodiment includes butterfly plate (3), valve rod (7), valve body (1), valve seat (2), secondary valve (4) and valve rod (7) and secondary valve (4), the connection set of butterfly plate (3), wherein, be provided with the straight trough (11) that skewed slot (10) and is parallel to the valve rod center line in the valve rod lower end, straight trough (11) center line and valve rod center line have a throw of eccentric, because it is bigger to be used to be provided with the spatial position of straight trough on the valve rod, straight trough can be located at apart from valve rod center line farthest, skewed slot (10) is connected continuously with straight trough (11), the outside, valve rod lower end is provided with sliding york (5), valve rod passes between two bifurcateds of sliding york (5), and by groove (10,11), locating stud (6) be connected with sliding york (5) (as shown in Figure 2); Also can be as shown in Figure 3, valve rod (7) is connected with sliding york (5) by groove (15), positioning screwn (16).Secondary valve (4) is located on the butterfly plate (3), the operating handle and the sliding york (5) of secondary valve (4) fuse, the circumference that sliding york is inserted in secondary valve pilot hole (14) one ends is provided with several discharge orifice (12), and end face is provided with the big discharge orifice in center (13), and communicates with discharge orifice (12); Two divergent ends of sliding york (5) are provided with
Shape groove (9), it moves limit stoper with position-limited shaft (8) the formation sliding york that is connected on the butterfly plate.
During valve opening, carry on the valve rod straight line, locating stud moves down along skewed slot, and drives sliding york and move right, and secondary valve is opened, and the pressure of main valve inner chamber is shed by discharge orifice (12), the big discharge orifice in center (13); Simultaneously, sliding york continues to move right, on sliding york
The bottom of shape groove (9) and position-limited shaft (8) are when colliding, sliding york (5) by promote position-limited shaft (8) drive butterfly plate (5) to Right deviation from, till the center line and straight trough (11) central lines of locating stud (6), make the bigger spacing of formation between butterfly plate (5) and the valve seat; This moment, valve rod began rotation when rising, and under the effect of flat arm in valve rod lower end and sliding york (5), butterfly plate (5) is driven to rotate under the frictionless situation 90 °, valve wide open.
During valve closing, the valve rod rotation descends, drive butterfly plate (5) 90 ° of counterrotatings under the frictionless situation by the flat arm in valve rod lower end and sliding york (5), make butterfly plate (5) and valve seat (2) be in relative status, remained big gap between butterfly plate (5) and the valve seat (2) this moment; After this, valve rod begins straight line and descends, and locating stud moves up along skewed slot, and the drive sliding york is moved to the left, secondary valve is closed, and simultaneously, sliding york continues to be moved to the left, promote butterfly plate (5) and progressively press to quiet valve seat (2), sealing fully between butterfly plate (5) and valve seat (2), valve complete shut-down.
In sum, the utility model compared with prior art has the following advantages:
When 1, butterfly valve is opened, earlier by the pressure off-load of secondary valve with valve insertion, while butterfly plate and valve Form bigger spacing between the seat, butterfly plate is turned in the situation of pressure reduction not having friction and almost do not have Moving, easy to operate, laborsaving.
2, owing to there is not the friction generation between butterfly plate and the valve seat, avoided the wearing and tearing of sealing surface, prolonged The service life of valve.
3, during valve closing, valve rod lower end skewed slot acts on a very big branch that produces on the alignment pin Power is pressed to valve seat by force with butterfly plate, make between butterfly plate and the valve seat can do not rely on medium differential pressure or Obtain very closely effect in the situation of negative pressure, sealing property is reliable.
Claims (3)
1, a kind of low-torque butterfly valve, comprise butterfly plate (3), valve rod (7), it is characterized in that being provided with the straight trough (11) that a skewed slot (10) and is parallel to the valve rod center line in the valve rod lower end, skewed slot (10) is connected continuously with straight trough (11), straight trough (11) center line and valve rod center line have a throw of eccentric, the outside, valve rod lower end is provided with sliding york (5), valve rod passes between two bifurcateds of sliding york (5), and be connected with sliding york (5) by groove (10,11), locating stud (6), sliding york (5) one ends are connected with butterfly plate (3).
2, low-torque butterfly valve according to claim 1 is characterized in that butterfly plate (3) is provided with secondary valve (4), and the operating handle of secondary valve (4) and sliding york (5) fuse, and two divergent ends of sliding york (5) are provided with
Shape groove (9), it moves limit stoper with position-limited shaft (8) the formation sliding york that is connected on the butterfly plate.
3, low-torque butterfly valve according to claim 2, it is characterized in that the circumference that sliding york (5) is inserted in secondary valve (4) pilot hole (14) one ends is provided with several discharge orifice (12), end face is provided with the big discharge orifice in center (13), and communicates with discharge orifice (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00241213 CN2429696Y (en) | 2000-06-14 | 2000-06-14 | Butterfly gate with low moment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00241213 CN2429696Y (en) | 2000-06-14 | 2000-06-14 | Butterfly gate with low moment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2429696Y true CN2429696Y (en) | 2001-05-09 |
Family
ID=33601728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00241213 Expired - Fee Related CN2429696Y (en) | 2000-06-14 | 2000-06-14 | Butterfly gate with low moment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2429696Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030395A (en) * | 2017-11-28 | 2019-07-19 | 阿自倍尔株式会社 | Valve shaft and spool lock fixing structure |
-
2000
- 2000-06-14 CN CN 00241213 patent/CN2429696Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030395A (en) * | 2017-11-28 | 2019-07-19 | 阿自倍尔株式会社 | Valve shaft and spool lock fixing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| FG1K | Grant of 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 |