CN101520094A - Bidirectional metallic seal butterfly valve - Google Patents
Bidirectional metallic seal butterfly valve Download PDFInfo
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- CN101520094A CN101520094A CN200810189062A CN200810189062A CN101520094A CN 101520094 A CN101520094 A CN 101520094A CN 200810189062 A CN200810189062 A CN 200810189062A CN 200810189062 A CN200810189062 A CN 200810189062A CN 101520094 A CN101520094 A CN 101520094A
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- valve
- butterfly
- valve rod
- butterfly plate
- valve body
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Abstract
The invention relates to a bidirectional metallic seal butterfly valve, which comprises a valve body 6; a butterfly plate 7 is arranged in the valve body 6 through a valve rod 9; the bidirectional metallic seal butterfly valve is characterized in that the butterfly plate 7 is provided with wedged dovetail grooves up and down; an upper wedge block 11 and a lower wedge block 5 are arranged in the upper wedged dovetail groove and the lower dovetail groove of the butterfly plate 7 respectively; the valve rod 9 passes through inner holes of the upper wedge block 11 and the lower wedge block 5; an end cover 1 is arranged at the lower end of the valve body 6; a valve cover 15 is arranged at the upper end of the valve body 6; a stuffing box is arranged in the valve cover 15; a stuffing 14 is arranged in the stuffing box of the valve cover 15 through a stuffing gland bush 16; a guide block 17 is fixed on the valve cover 15 and is inserted into a guide groove of the valve rod 9; a valve rod nut 18 is arranged on the upper part of the valve cover 15 and is screwed on the valve rod 9; a bearing 19 is arranged on a convex shoulder of the valve rod nut 18; a bearing gland bush 20 is connected with the valve cover 15 by screw threads; and a hand wheel 22 is arranged on the valve rod nut 18. The bidirectional metallic seal butterfly valve has good sealing performance and reliability, not only ensures that the butterfly valve can be sealed in a positive state, but also ensures the seal in a reverse state, and has simple design and processing.
Description
Technical field
The present invention relates to be used for the metallic sealing butterfly valve technical field of industries such as oil, chemical industry, electric power, water conservancy, relate in particular to a kind of bidirectional metallic seal butterfly valve.
Background technique
In the prior art, its main structure of metal hard-sealing butterfly valve is two off-centre and three eccentric butterfly valve, and the butterfly plate of two off-centre and three eccentric butterfly valve and the sealing between the valve seat are to lean on the moment of transmission device to make butterfly plate press to valve seat to reach sealing; During the medium forward flow, pressure medium increases seal pressure more, improves sealability; During the medium reverse flow, pressure medium reduces the seal pressure between butterfly plate and the valve seat, might leak, and the eccentric structure metal hard-sealing butterfly valve can not guarantee the sealing that reverse media flows fully.Along with carrying out of China's project of South-to-North water diversion, the continuous construction of long-distance transport pipes, and industry environmental protection, water treatment, tall building, water-feeding ﹠ drainaging pipeline transformation, sealability to butterfly valve is also had higher requirement, should guarantee that butterfly valve can seal in forward condition, also will can guarantee sealing, so the two-way flow hard seal butterfly valve obtains the concern of domestic valve industry in reverse state.
Summary of the invention
The objective of the invention is to by analyzing the sealing force of eccentric-butterfly-valve, propose a kind of two-way pressure metal hard-sealing butterfly valve, effectively overcome the described a series of problems of background technique at defective of the prior art.
The technical solution adopted for the present invention to solve the technical problems is: described bidirectional metallic seal butterfly valve, include valve body 6, butterfly plate 7 is installed in the valve body 6 by valve rod 9, its characteristics are: described butterfly plate 7 upper and lower settings wedge shape dovetail grooves, last voussoir 11, lower wedge block 5 is located at respectively in the dovetail groove of wedge shape up and down of butterfly plate 7, valve rod 9 passes voussoir 11, the endoporus of lower wedge block 5, valve body 6 lower ends are provided with end cap 1, valve body 6 upper ends are provided with valve gap 15, be provided with stuffing box in the valve gap 15, filler 14 is installed in valve gap 15 stuffing boxes by Gland 16, and guide pad 17 is fixed on the valve gap 15, and inserts in the guiding groove of valve rod 9, Stem Mut 18 is installed in valve gap 15 tops, and screw on valve rod 9, bearing 19 is installed on the convex shoulder of Stem Mut 18, and bearing gland 20 usefulness screw threads are connected with valve gap 15; Handwheel 22 is arranged on the Stem Mut 18.
Described bidirectional metallic seal butterfly valve, in opening state, handwheel dextrorotation, guide pad guiding valve rod only rotates, and drives butterfly plate rotation earlier; Handwheel continues dextrorotation, and guide pad guiding valve rod only moves down, and promotes upper and lower voussoir moving linearly, and the voussoir wedge surface promotes butterfly plate and contacts with valve body sealing surface, and butterfly valve cuts out, and realizes sealing, and sealing pair does not produce friction; In off position, handwheel is left-handed, and guide pad guiding valve rod only moves up, and promotes upper and lower voussoir moving linearly, and the voussoir wedge surface drives the butterfly plate translation and valve body sealing surface breaks away from; Handwheel continues dextrorotation, and guide pad guiding valve rod only rotates, and drives the butterfly plate rotation, and butterfly valve is opened.The motion of its butterfly plate is the compound motion of straight line and rotation, during the sealing surface rotation and valve body sealing surface certain offset distance is arranged, two sealing pairs do not interfere when rotated, have solved the interference problem of metal hard-sealing butterfly valve sealing pair.
The present invention compares with background technique, and the useful effect that has is: described bidirectional metallic seal butterfly valve, and wedge-shaped blocks thrust can overcome the pressure of medium reverse flow, makes butterfly valve be issued to sealing in medium two-way flow medium operating mode; The upper and lower position of valve rod is provided with wedge-shaped blocks, be provided with the wedge shape dovetail groove on the butterfly plate, valve rod moves up and down and drives the wedge-shaped blocks motion, the wedge-shaped blocks displacement applies sealing force to the butterfly plate sealing surface, improved the sealability of butterfly valve, wearing and tearing that simultaneously can the compensation sealing pair have improved the metallic sealing butterfly valve reliability; The wedge surface of wedge-shaped blocks promotes butterfly plate and does reciprocating linear motion in butterfly plate wedge shape dovetail groove, make the butterfly plate contact and break away from valve body sealing surface, reduces the scratch of sealing surface; Butterfly plate elder generation straight line motion rotatablely moves then, has prolonged the opening and closing time of butterfly valve, has reduced the hydrodynamic(al) moment of butterfly valve; Butterfly plate sealing surface and valve body sealing surface are the conical surface, and sealing is reliable, and design and processing are simple.
Description of drawings
Fig. 1 is that structural principle master of the present invention looks schematic representation;
Fig. 2 is that schematic representation is looked on a structural principle of the present invention left side;
Fig. 3 is an A-A place cross-sectional view structural representation among Fig. 1 of the present invention;
Fig. 4 is the certain eccentric distance of butterfly plate straight line motion of the present invention, and butterfly plate breaks away from the structural representation of valve body sealing surface;
Fig. 5 is the schematic representation that butterfly plate half-twist of the present invention arrives the enable possition.
Among the figure: 1. end cap, 2. first bolt, 3. first nut, 4. first locking nut, 5. lower wedge block, 6. valve body, 7. butterfly plate, 8. locking nut, 9. valve rod, 10. second locking nut, voussoir on 11., 12. second bolts, 13. second nut, 14. valve gaps, 15. valve gaps, 16. Glands, 17. guide pad, 18. Stem Muts, 19. bearings, 20. bearing gland, 21. keys, 22. handwheels.
Embodiment
As Fig. 1,2,3,4, shown in 5, described bidirectional metallic seal butterfly valve, include valve body 6, butterfly plate 7 is installed in the valve body 6 by valve rod 9, its characteristics are: described butterfly plate 7 upper and lower settings wedge shape dovetail grooves, last voussoir 11, lower wedge block 5 is located at respectively in the dovetail groove of wedge shape up and down of butterfly plate 7, valve rod 9 passes voussoir 11, the endoporus of lower wedge block 5, valve body 6 lower ends are provided with end cap 1, valve body 6 upper ends are provided with valve gap 15, are provided with stuffing box in the valve gap 15, and filler 14 is installed in valve gap 15 stuffing boxes by Gland 16, guide pad 17 is fixed on the valve gap 15, and insert in the guiding groove of valve rod 9, Stem Mut 18 is installed in valve gap 15 tops, and screws on valve rod 9, bearing 19 is installed on the convex shoulder of Stem Mut 18, and bearing gland 20 usefulness screw threads are connected with valve gap 15; Handwheel 22 is arranged on the Stem Mut 18.
Described lower wedge block 5 is installed in valve rod 9 lower ends by first locking nut 4 and second locking nut 8; Last voussoir 11 is installed in valve rod 9 upper ends by locking nut 10.End 1 is installed in valve body 6 lower ends by first bolt 2 and first nut 3, and valve gap 15 is installed in valve body 6 upper ends by second bolt 12 and second nut 13.Stem Mut 18 is provided with keyway, and handwheel 22 is installed on the Stem Mut 18 by key 21.Guiding groove on the valve rod 9 is 90 ° of horizontal vertically-guided grooves of control valve rod 9 strokes.The sealing surface of valve body 6 and butterfly plate 7 is the conical surface.
Described bidirectional metallic seal butterfly valve, in opening state, handwheel 22 dextrorotation, drive Stem Mut 18 rotations by key 21, guide pad 17 guides valve rod 9 to do 90 ° of rotations in 90 ° of laterally steering grooves of valve rod 9, valve rod 9 drives butterfly plates 7 half-twists with interior voussoir 11, the lower wedge block 5 of the dovetail groove of wedge shape up and down that is inserted in butterfly plate 7, makes valve body 6 sealing surfaces and butterfly plate 7 sealing surfaces be in parallel position; Handwheel 22 continues dextrorotation, guide pad 17 enters in the valve rod 9 vertically-guided grooves, guiding valve rod 9 moves downward, valve rod 9 promotes to go up voussoir 11, lower wedge block 5 moves downward, last voussoir 11, lower wedge block 5 promote butterfly plate 7 and contact with valve body 6 sealing surfaces in the dovetail groove of wedge shape up and down of butterfly plate 7, butterfly valve cuts out, and realizes sealing.In off position, handwheel 22 is left-handed, drive Stem Mut 18 rotations by key 21, guide pad 17 is in valve rod 9 vertically-guided grooves, guiding valve rod 9 moves upward, valve rod 9 promotes to go up voussoir 11, lower wedge block 5 moves upward, and last voussoir 11, lower wedge block 5 promote butterfly plate 7 in the dovetail groove of wedge shape up and down of butterfly plate 7 and valve body 6 breaks away from sealing surface.Handwheel 22 continues dextrorotation, guide pad 17 is in entering 90 ° of laterally steering grooves of valve rod 9, guiding valve rod 9 is done 90 ° of rotations, and valve rod 9 drives butterfly plates 7 half-twists with interior voussoir 11, the lower wedge block 5 of the dovetail groove of wedge shape up and down that is inserted in butterfly plate 7, realizes the unlatching of butterfly valve.
Be provided with the vertically-guided groove of 90 ° of laterally steering grooves of control valve rod 9 strokes and certain altitude on the valve rod 9 and be arranged on guide pad 17 on the valve gap 15 and have the valve rod of realization up and down and the function that rotatablely moves; On the valve rod 9, following position is provided with voussoir 11, lower wedge block 5 wedge-shaped blockss, be provided with the wedge shape dovetail groove on the butterfly plate 7, last voussoir 11, lower wedge block 5 inserts butterfly plate 7 wedge shape dovetail grooves, valve rod 9 moves up and down to drive and goes up voussoir 11, lower wedge block 5 motions, last voussoir 11, the wedge surface of lower wedge block 5 promotes butterfly plate 7 and does reciprocating linear motion in butterfly plate 7 wedge shape dovetail grooves, make butterfly plate 7 contacts and break away from valve body 6 sealing surfaces, reduce the scratch of sealing surface, and butterfly plate 7 sealing surfaces are applied sealing force, last voussoir 11, the sealing force that lower wedge block 5 and butterfly plate wedge 7 shape dovetail grooves apply can make butterfly valve reach sealing bearing the bi-directional medium masterpiece time spent, has two-way means of press seals function;
Last voussoir 11, lower wedge block 5 vertical movement promote butterfly plate 7 lateral displacements by butterfly plate 7 wedge shape dovetail grooves, and consequent lateral thrust can remedy the wear extent and valve rod 9 amount of deformation of butterfly valve seal pair, has improved sealability, has prolonged working life.
Valve rod 9 upper and lower positions are provided with voussoir 11, lower wedge block 5 wedge-shaped blockss, be provided with the wedge shape dovetail groove on the butterfly plate 7, last voussoir 11, lower wedge block 5 insert butterfly plate 7 wedge shape dovetail grooves, valve rod 9 moves up and down to drive and goes up voussoir 11, lower wedge block 5 motions, the wedge surface of last voussoir 11, lower wedge block 5 promotes butterfly plate 7 and does reciprocating linear motion in butterfly plate 7 wedge shape dovetail grooves, make butterfly plate 7 contacts and break away from valve body 6 sealing surfaces, reduce the scratch of sealing surface, solved the interference problem of bidirectional metallic seal butterfly valve sealing pair.
Claims (6)
1, bidirectional metallic seal butterfly valve, include valve body (6), butterfly plate (7) is installed in the valve body (6) by valve rod (9), it is characterized in that: described butterfly plate (7) upper and lower settings wedge shape dovetail groove, last voussoir (11), lower wedge block (5) is located at respectively in the dovetail groove of wedge shape up and down of butterfly plate (7), valve rod (9) passes voussoir (11), the endoporus of lower wedge block (5), valve body (6) lower end is provided with end cap (1), valve body (6) upper end is provided with valve gap (15), valve gap is provided with stuffing box in (15), filler (14) is installed in valve gap (15) stuffing box by Gland (16), guide pad (17) is fixed on the valve gap (15), and in the guiding groove on the insertion valve rod (9), Stem Mut (18) is installed in valve gap (15) top, and screw on valve rod (9), bearing (19) is installed on the convex shoulder of Stem Mut (18), and bearing gland 20 usefulness screw threads are connected with valve gap 15; Handwheel (22) is arranged on the Stem Mut (18).
2, bidirectional metallic seal butterfly valve according to claim 1 is characterized in that: described lower wedge block (5) is installed in valve rod (9) lower end by first locking nut (4) and second locking nut (8); Last voussoir (11) is installed in valve rod (9) upper end by locking nut (10).
3, bidirectional metallic seal butterfly valve according to claim 1, it is characterized in that: described end cap (1) is installed in valve body (6) lower end by first bolt (2) and first nut (3), and valve gap (15) is installed in valve body (6) upper end by second bolt (12) and second nut (13).
4, bidirectional metallic seal butterfly valve according to claim 1 is characterized in that: described Stem Mut (18) is provided with keyway, and handwheel (22) is installed on the Stem Mut (18) by key (21).
5, bidirectional metallic seal butterfly valve according to claim 1 is characterized in that: the guiding groove on the described valve rod (9) is 90 ° of horizontal vertically-guided grooves of control valve rod (9) stroke.
6, bidirectional metallic seal butterfly valve according to claim 1 is characterized in that: the sealing surface of described valve body (6) and butterfly plate (7) is the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810189062A CN101520094A (en) | 2008-12-16 | 2008-12-16 | Bidirectional metallic seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810189062A CN101520094A (en) | 2008-12-16 | 2008-12-16 | Bidirectional metallic seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101520094A true CN101520094A (en) | 2009-09-02 |
Family
ID=41080837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810189062A Pending CN101520094A (en) | 2008-12-16 | 2008-12-16 | Bidirectional metallic seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101520094A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277527A (en) * | 2013-05-09 | 2013-09-04 | 浙江宝龙阀门制造有限公司 | Double-sealing-pair metal sealing butterfly valve |
| CN109175944A (en) * | 2018-10-12 | 2019-01-11 | 江苏核电有限公司 | A kind of self-sealing check-valves self-sealing packing mounting device and its operating method |
-
2008
- 2008-12-16 CN CN200810189062A patent/CN101520094A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277527A (en) * | 2013-05-09 | 2013-09-04 | 浙江宝龙阀门制造有限公司 | Double-sealing-pair metal sealing butterfly valve |
| CN109175944A (en) * | 2018-10-12 | 2019-01-11 | 江苏核电有限公司 | A kind of self-sealing check-valves self-sealing packing mounting device and its operating method |
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Open date: 20090902 |