CN1329221A - Low-torque butterfly valve - Google Patents
Low-torque butterfly valve Download PDFInfo
- Publication number
- CN1329221A CN1329221A CN 00119105 CN00119105A CN1329221A CN 1329221 A CN1329221 A CN 1329221A CN 00119105 CN00119105 CN 00119105 CN 00119105 A CN00119105 A CN 00119105A CN 1329221 A CN1329221 A CN 1329221A
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- CN
- China
- Prior art keywords
- valve
- valve rod
- sliding york
- butterfly plate
- butterfly
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Abstract
A low-torque butterfly valve relates to the field of valve technology, and is characterized by that the lower end of valve rod is equipped with an oblique slot and an accentric straight slot, the outer side of lower end of the valve rod is equipped with a sliding yoke, and the valve rod is passed through the sliding yoke, and connected with the said sliding yoke by means of slot and positioning pin, and one end of the sliding yoke is connected with butterfly plate. This invention is aimed at reducing operation torque of butterfly valve, and as compared with the existent technology, it possesses the advantages of convenient operation, saving labour, long service life and reliable sealing property, etc.
Description
The present invention 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 objective of the invention is to design a kind of low-torque butterfly valve of low operational torque.
In order to achieve the above object, the present invention 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 present invention is described in further detail.
Fig. 1 is present embodiment main structure figure.
Fig. 2 is that Fig. 1 is along 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) be 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 present invention 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, two divergent ends of sliding york (5) be 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 00119105 CN1329221A (en) | 2000-06-14 | 2000-06-14 | Low-torque butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00119105 CN1329221A (en) | 2000-06-14 | 2000-06-14 | Low-torque butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1329221A true CN1329221A (en) | 2002-01-02 |
Family
ID=4587494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00119105 Pending CN1329221A (en) | 2000-06-14 | 2000-06-14 | Low-torque butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1329221A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846230A (en) * | 2016-03-25 | 2016-08-10 | 时贞平 | High-efficient construction machine power line connecting and locking device |
| CN107740868A (en) * | 2017-11-20 | 2018-02-27 | 郭弘 | A kind of butterfly valve with pre- decompression function |
-
2000
- 2000-06-14 CN CN 00119105 patent/CN1329221A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846230A (en) * | 2016-03-25 | 2016-08-10 | 时贞平 | High-efficient construction machine power line connecting and locking device |
| CN107740868A (en) * | 2017-11-20 | 2018-02-27 | 郭弘 | A kind of butterfly valve with pre- decompression function |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
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