CN201925495U - Double-eccentricity two-way metal hard seal butterfly valve - Google Patents
Double-eccentricity two-way metal hard seal butterfly valve Download PDFInfo
- Publication number
- CN201925495U CN201925495U CN2011200552530U CN201120055253U CN201925495U CN 201925495 U CN201925495 U CN 201925495U CN 2011200552530 U CN2011200552530 U CN 2011200552530U CN 201120055253 U CN201120055253 U CN 201120055253U CN 201925495 U CN201925495 U CN 201925495U
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- valve
- butterfly
- butterfly plate
- valve body
- shaft
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Abstract
The utility model discloses a double-eccentricity two-way metal hard seal butterfly valve which comprises a valve body and a valve shaft arranged in a shaft hole of the valve body, wherein one end of the valve shaft extends out of the valve body to be connected with a drive mechanism, and the other end of the valve shaft is connected with the valve body through a connecting piece; a butterfly plate is arranged on the valve shaft positioned in an inner cavity of the valve body, and seal fit is adopted between the butterfly plate and a contact surface of a seal ring of the valve body; and the valve body symmetrically extends to the direction of the butterfly plate along the axial direction of the valve shaft and is provided with a dummy club, a positioning distance sleeve is sleeved on the valve shaft positioned in the dummy club, an axial plane at one end of the positioning distance sleeve is abutted against a plane of a shaft sleeve sleeved on the valve shaft, and clearance fit is adopted between the other end of the positioning distance sleeve and an end surface of a shaft hole seat of the butterfly plate. The utility model has the function that the valve double-eccentricity two-way metal hard seal butterfly valve becomes tighter and tighter every time being closed and has reliable sealing performance. A seal pair rapidly deviates or contacts when the valve is opened or closed, and a sealing surface is ensured to be deviated fully after the valve is opened, so that the service life of the butterfly valve is prolonged. When the butterfly plate is under opposite pressure, the valve shaft does not generate deflection, and the butterfly plate and the seal ring of the valve body are tightly jointed to ensure the two-way sealing effect.
Description
Technical field
The utility model relates to butterfly valve, especially relates to a kind of butterfly plate all can guarantee butterfly plate and sealing surface of seat when bearing forward and reverse pressure medium reliable sealing, guarantees that two eccentric two-ways of two way sealed effect are pressed metal hard-sealing butterfly valve.
Background technique
Butterfly valve is to slow down through mechanisms such as worm gear pairs by rotating handwheel (or taper shank square toes), and drive valve shaft, butterfly plate are done the rotation of 90 ° of scopes, thereby reached the purpose of blocking, being communicated with or regulate rate-of flow.Existing bidirectional metallic seal butterfly valve mainly contains three eccentric structures and two eccentric structure.Butterfly valve for three eccentric structures, when butterfly plate bears huge reverse media pressure, because the distance excessive (cantilever that is valve shaft is oversize) between body cavity and the butterfly plate boss causes valve shaft bending deflection, produce the gap between butterfly plate and the valve seat insert, cause leakage; Simultaneously for preventing the axial float of butterfly plate, to between butterfly plate and valve shaft, install locating stud additional, when the circulation medium of butterfly valve inner chamber is high temperature media, because swollen the rising of high temperature of valve shaft, can cause butterfly plate and valve seat clamping stagnation, butterfly valve occur and do not open or serious problems such as close incessantly; Butterfly valve for two eccentric structures, when butterfly plate bears huge reverse media pressure, it is same because the distance between body cavity and the butterfly plate boss is excessive, the valve shaft bending can appear, butterfly plate moves down, make butterfly plate, the gap appears between the valve seat, for compensating this displacement, be provided with the rubber elasticity seal ring at the valve seat insert rear portion, but when the circulation medium of butterfly valve inner chamber is high temperature media, high-temperature resistant only has 200 ℃ rubber elasticity seal ring just not satisfy normal use under this working condition, so this type of butterfly valve does not belong to metal hard-sealing butterfly valve truly.The metal hard-sealing butterfly valve of the still two eccentric structures of the butterfly valve of three eccentric structures simultaneously no matter, valve seat insert is 304 Austenitic Stainless Steels such as grade or stainless steel+asbestos (or graphite) multi-layer sealing ring, this type of material hardness is low, when containing micro-sand and dust or impurity in the medium, very easily cause the damage scratch of butterfly valve seal core members (seal ring), cause secondary leakage of butterfly valve seal to be damaged until scrapping.
Summary of the invention
The purpose of this utility model is to provide a kind of two way sealed performance good, long service life, is applicable to that two eccentric two-ways of high temperature media are pressed metal hard-sealing butterfly valve.
For achieving the above object, the utility model can be taked following technical proposals:
Described in the utility model pair of eccentric two-way pressed metal hard-sealing butterfly valve, comprises valve body and is arranged on the interior valve shaft of valve body axis hole, and an end of described valve shaft extends outside the valve body and driving mechanism links, and the other end links by link and valve body; The valve shaft that is positioned at body cavity is provided with butterfly plate, is sealed and matched between the surface of contact of described butterfly plate and valve seals; Described valve body is provided with boss along axially symmetrical the extension to the butterfly plate direction of valve shaft, be set with positioning spacer being positioned on the valve shaft of boss, one end axial plane of described positioning spacer reclines Spielpassung between the other end and the described butterfly plate boss end face mutually with the plane of axle sleeve on being sleeved on valve shaft.
Described valve shaft is an integral structure, is key connecting between described butterfly plate and the valve shaft.
Be placed with dottle pin and sealing gland on the described valve seals successively, screwed adjusting screw in the tapped through hole of offering on the described sealing gland.Adjusting screw is two screws, with fastening locking.
The bottom of described sealing gland is provided with annular boss.For realizing assembling, sealing gland is set to the branch body structure, and sealing gland is fixed as one after fitting into valve body recess again, with anticreep.
On the surface of contact between described valve seals and the butterfly plate respectively built-up welding hard alloy layer is arranged.
Advantage of the present utility model is that valve body is provided with boss along valve shaft to the extension of butterfly plate direction, so just can make the cantilever size of valve shaft as much as possible little, be set with positioning spacer being positioned on the valve shaft of boss then, positioning spacer one end axial plane reclines mutually with axle sleeve plane on being sleeved on valve shaft, little Spielpassung between the other end and the butterfly plate boss end face, with the keying of guaranteeing butterfly plate flexibly and butterfly plate axial spacing of valve shaft.When butterfly plate bears reverse media pressure, strength is directly transferred on the valve shaft, valve shaft is stress and be subjected to shearing stress by bending not, valve shaft can not produce amount of deflection herein, be aided with the butterfly plate sufficient intensity, thereby guarantee fitting tightly and enough seal pressures are arranged between butterfly plate and the valve seals, guarantee the two way sealed effect, can be adapted to circulation medium is high temperature media.The utility model passes through the direct transmitting torque of driving mechanism to the butterfly plate sealing pair, has the tight more function in pass more, sealability is reliable, during keying, sealing pair disengages soon, has guaranteed the working life of sealing pair, guarantees after the unlatching that sealing surface disengages fully, make sealing surface injury-free, prolonged the working life of butterfly valve.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in the figure, described in the utility model pair of eccentric two-way pressed metal hard-sealing butterfly valve, comprises valve body 1 and is arranged on the interior valve shaft 2 of valve body axis hole, and an end of described valve shaft 2 extends outside the valve body 1 and driving mechanism links; The other end links by splitting collar 12 parts such as grade and valve body, plays the axially locating effect; The valve shaft 2 that is positioned at valve body 1 inner chamber is provided with butterfly plate 3, is sealed and matched between the surface of contact of described butterfly plate 3 and valve seals 4; Described valve body 1 is along the axially symmetrical boss 5 that is provided with the valve body integrally casting that extends to butterfly plate 3 directions of valve shaft 2, on the valve shaft 2 that is positioned at boss 5, be set with positioning spacer 6, the cylindrical of described positioning spacer 6 and step inner plane match with valve body 1 axis hole, one end axial plane of positioning spacer 6 reclines mutually with axle sleeve 7 planes on being sleeved on valve shaft 2, reserve micro-gap between the other end axial plane and the described butterfly plate 3 boss end faces, with the keying of guaranteeing butterfly plate 3 flexibly and butterfly plate 3 axial spacing of valve shaft.Because the valve body 1 at place, butterfly plate 3 two ends is along the axially effect of the boss 5 of setting of valve shaft 2, make that the cantilever size of valve shaft 2 is very little, then by placement positioning spacer 6 in the valve body axis hole, positioning spacer 6 cylindricals and step inner plane match with valve body 1 axis hole, and an end axial plane of positioning spacer 6 reclines mutually with axle sleeve 7 planes on being sleeved on valve shaft 2.Reserve micro-gap between the other end axial plane and the butterfly plate 3 boss end faces, gap between butterfly plate 3 and the positioning spacer 6 is no more than 0.2-0.4mm, when butterfly plate 3 bears reverse media pressure, strength is directly conducted on the valve shaft 2, valve shaft 2 is stress and be subjected to shearing stress by bending not, make valve shaft 2 not produce amount of deflection, be aided with butterfly plate 3 sufficient intensities, guaranteed the sealing effect between butterfly plate 3 and the valve seals 4 at boss place, the two ends of butterfly plate 3.So described in the utility model pair of eccentric two-way pressed metal hard-sealing butterfly valve, when pressure medium was positive pressure, that can fit along with the increase of pressure medium between butterfly plate 3 and the valve seals 4 was better, and sealing effect is also better; When pressure medium is backpressure, be fitted with enough seal pressures between butterfly plate and the valve seals 4, realize the reliable sealing of the two formed sealing pair.
Described valve shaft 2 is an integral structure, is key connecting between described butterfly plate 3 and the valve shaft 3.Because the axially locating of butterfly plate 3 relies on positioning spacer 6 to realize, when the medium that is flowed when the butterfly valve inner chamber was high temperature media, valve shaft 2 overwhelming majority were in valve body 1 inner chamber, and the linear expansion size is big, valve shaft 2 can axially slide in butterfly plate 3 axis holes, does not influence the sealing effect of butterfly valve seal pair.
Be placed with dottle pin 8 and sealing gland 9 on the described valve seals 4 successively, screwed adjusting screw 10 in the tapped through hole of offering on the described sealing gland 9, adjusting screw 10 is two screws, to reach fastening locking purpose.Because the sealing surface of butterfly plate 3 is a sphere, valve seals 4 be self-align centering, and the adjustment by adjusting screw 10 compresses the seal pressure at assurance valve seals 4 places.
The bottom of described sealing gland 9 is provided with annular boss 11, and after the installation, annular boss 11 is stuck in the groove in the valve body 1, has guaranteed the reliable location of valve seals 4.For realizing assembling, sealing gland 9 is set to the branch body structure, is fixed as one behind the inlet valve body groove to be assembled, with anticreep again.
On the surface of contact between described valve seals 4 and the butterfly plate 3 respectively built-up welding hard alloy layer is arranged, sealing pair material hardness height has self-cleaning function, and is not fragile, long service life is applicable to high temperature media simultaneously; Sealing surface between the two is a sphere, is easy to processing, and processing cost is low, and suface processing quality is easy to guarantee.
Use this butterfly valve structure,, can reach the effect of two way sealed equally if valve seals 4 is changed to stainless steel or stainless steel+asbestos (or graphite) multi-layer sealing ring.
Claims (5)
1. two eccentric two-ways are pressed metal hard-sealing butterfly valve, comprise valve body (1) and be arranged on the interior valve shaft (2) of valve body axis hole, one end of described valve shaft (2) extends outside the valve body (1) and driving mechanism links, and the other end links by link and valve body (1); The valve shaft (2) that is positioned at valve body (1) inner chamber is provided with butterfly plate (3), is sealed and matched between the surface of contact of described butterfly plate (3) and valve seals (4); It is characterized in that: described valve body (1) is provided with boss (5) along axially symmetrical the extension to butterfly plate (3) direction of valve shaft (2), on the valve shaft that is positioned at boss (5) (2), be set with positioning spacer (6), one end axial plane of described positioning spacer (6) reclines Spielpassung between the other end and described butterfly plate (3) the boss end face mutually with the plane of axle sleeve (7) on being sleeved on valve shaft (2).
2. according to claim 1 pair of eccentric two-way pressed metal hard-sealing butterfly valve, and it is characterized in that: described valve shaft (2) is an integral structure, is key connecting between described butterfly plate (3) and the valve shaft (2).
3. according to claim 1 and 2 pair of eccentric two-way pressed metal hard-sealing butterfly valve, it is characterized in that: be placed with dottle pin (8) and sealing gland (9) on the described valve seals (4) successively, screwed adjusting screw (10) in the tapped through hole of offering on the described sealing gland (9).
4. according to claim 3 pair of eccentric two-way pressed metal hard-sealing butterfly valve, and it is characterized in that: the bottom of described sealing gland (9) is provided with annular boss (11).
5. the according to claim 3 pair of eccentric two-way pressed metal hard-sealing butterfly valve, it is characterized in that: on the surface of contact between described valve seals (4) and the butterfly plate (3) respectively built-up welding hard alloy layer is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200552530U CN201925495U (en) | 2011-03-04 | 2011-03-04 | Double-eccentricity two-way metal hard seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200552530U CN201925495U (en) | 2011-03-04 | 2011-03-04 | Double-eccentricity two-way metal hard seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201925495U true CN201925495U (en) | 2011-08-10 |
Family
ID=44429343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200552530U Expired - Fee Related CN201925495U (en) | 2011-03-04 | 2011-03-04 | Double-eccentricity two-way metal hard seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201925495U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547956A (en) * | 2018-05-28 | 2018-09-18 | 开封瑞科阀门有限公司 | A kind of self sealss movement butterfly plate low temperature butterfly valve |
| CN109973714A (en) * | 2019-04-23 | 2019-07-05 | 蚌埠中光电科技有限公司 | A kind of butterfly valve for float glass lehr |
-
2011
- 2011-03-04 CN CN2011200552530U patent/CN201925495U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547956A (en) * | 2018-05-28 | 2018-09-18 | 开封瑞科阀门有限公司 | A kind of self sealss movement butterfly plate low temperature butterfly valve |
| CN108547956B (en) * | 2018-05-28 | 2023-11-21 | 开封瑞科阀门有限公司 | Self-sealing movable butterfly plate low-temperature butterfly valve |
| CN109973714A (en) * | 2019-04-23 | 2019-07-05 | 蚌埠中光电科技有限公司 | A kind of butterfly valve for float glass lehr |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20170304 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |