CN1773150A - Floating adjustable bidirectional metal hard-sealing butterfly valve - Google Patents
Floating adjustable bidirectional metal hard-sealing butterfly valve Download PDFInfo
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- CN1773150A CN1773150A CN 200510095647 CN200510095647A CN1773150A CN 1773150 A CN1773150 A CN 1773150A CN 200510095647 CN200510095647 CN 200510095647 CN 200510095647 A CN200510095647 A CN 200510095647A CN 1773150 A CN1773150 A CN 1773150A
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Abstract
The present invention discloses a floating adjustable two-way metal hard sealed butterfly valve. Its structure includes valve body, valve seat, valve rod, butterfly plate, sealing component and mounting component. Said invention also provides the concrete structure of the above-mentioned every portion and its working principle. Said invention is applicable to two-way working medium condition.
Description
Technical field
The present invention relates to a kind of bidirectional metal hard-sealing butterfly valve, particularly about a kind of adjustable bidirectional metal hard-sealing butterfly valve.
Background technique
The hard seal butterfly valve of producing both at home and abroad is divided into elastic sealing structure and multi-level sealing configuration substantially at present.The elastic sealing structure butterfly valve relying on the elastic seal ring on the valve body to deform under the valve closing state, reaches interference fit and realizes sealing function.Its major defect is: in the frequent keying of using process, the elastic packing loop material fatigue occurs easily and follows the string, and does not reach seal request; Elastic seal ring is easily annealed phenomenon and is out of shape under the worst hot case, does not reach seal request; Sealing pair is linear sealing, and working life and scope are restricted.The butterfly valve of multi-level sealing configuration, the sealing pair on its butterfly plate is formed by the alternate gummed with the rubber asbestos material of metallic material, and " during state, velocity of medium makes the valve seal decreased performance to the erosion that the rubber asbestos produce when the butterfly plate unlatching is in 90.So the butterfly valve of these two kinds of structures all exists sealability unreliable, the problem that working life is short.For this reason, the can regulate hard seal butterfly valve of Chinese patent CN98225640.X, employing is provided with the O-ring seal that matches with valve body sealing surface on valve plate, and annular Adjusting ring is set between valve plate and O-ring seal, and annular Adjusting ring and O-ring seal have the oblique cone face that cooperatively interacts.Behind sealing surface wear, by adjusting Adjusting ring.Force the radial expansion of O-ring seal circumference, reach the reliable sealing with valve body sealing surface again, prolong product working life.But its major defect is need unload lower valve when regulating to carry out manual tune, is exactly stationary state between butterfly plate seal ring and the butterfly plate after regulating, can not regulate automatically at random in the course of the work and sealing surface of seat between relative position; In addition, sealing surface of seat and butterfly plate sealing surface are because of the restriction of machining accuracy, the circumferential sealing specific pressure is inhomogeneous when being sealed and matched between the two, be the key factor that influences the valve seal performance, the uneven automatic adjusting of circumferential sealing specific pressure when existing product all can not be realized sealing surface of seat and butterfly plate sealing surface be sealed and matched mutually.
Summary of the invention
The objective of the invention is shortcoming at the prior art existence, provide the online user mode of a kind of valve can regulate the state that is sealed and matched between butterfly plate seal ring and the sealing surface of seat and sealing pair circumferential sealing specific pressure automatically, the floating adjustable bidirectional metal hard-sealing butterfly valve of easy to adjust, good seal performance.
The technological scheme that realizes the object of the invention comprises valve body, valve seat, valve rod, butterfly plate and Sealing and assembling set, and butterfly plate is provided with the seal ring that cooperatively interacts with sealing surface of seat, and valve body, valve seat, valve rod, butterfly plate constitute three eccentric structures.Mainly be the butterfly plate seal ring adjustable structure that adopt to float, described unsteady adjustable structure is press-fited in the table top of butterfly plate by positioning ring by the butterfly plate seal ring and constitutes, and the butterfly plate seal ring can radial floating, and positioning ring is installed in another table top of butterfly plate by screw.
In above technological scheme, the sectional shape of butterfly plate seal ring is approximate U-shaped structure, and its sealing surface one side has to the obtuse angle of valve base sealing face tilt, and opposite side is press-fited on butterfly plate by positioning ring.
Preferably, valve seat is installed on the valve body table top by socket head screw, and and the valve body table top between leave the gap, cooperate for movable between valve seat and the socket head screw, can axial float.
Preferably, sealing surface of seat is eccentric tiltedly round platform envelope surface, and the butterfly plate seal ring has the sealing surface of positive circumference, adopts interference fit seal between the oval contour of the eccentric tiltedly round platform envelope surface of sealing surface of seat and the positive circumference of butterfly plate seal ring.
The present invention's beneficial effect compared with prior art is: the butterfly plate seal ring adopts the adjustable structure that floats, valve seat and butterfly plate seal ring under external force respectively can be axially and radial floating, therefore, in the valve closing process, the butterfly plate seal ring can be from the little position extruding of trend circumferential sealing specific pressure, and it is even to adjust the circumferential sealing specific pressure automatically; And, during the valve working state, under the pressure medium effect, can regulate magnitude of interference between butterfly plate seal ring and the sealing surface of seat automatically, make sealing pair reach the optimal seal state.Have the state that is sealed and matched between on-line automatic adjusting butterfly plate seal ring and the sealing surface of seat and sealing pair circumferential sealing specific pressure, advantage such as easy to adjust, good seal performance.
Description of drawings
Fig. 1 is a structure sectional view of the present invention.
Fig. 2 be among Fig. 1 of the present invention A-A to sectional view.
Fig. 3 is an I place partial enlarged drawing among Fig. 2 of the present invention.
Has mode of execution
Embodiment of the present invention now are described in further detail in conjunction with the accompanying drawings and embodiments.
As Fig. 1, floating adjustable bidirectional metal hard-sealing butterfly valve shown in Figure 2, structure comprises valve body 1, valve seat 2, valve rod, butterfly plate 3 and Sealing and assembling set, butterfly plate 3 is provided with the seal ring 4 that cooperatively interacts with valve seat 2 sealing surfaces, valve body 1, valve seat 2, valve rod, butterfly plate 3 constitutes three eccentric structures, be between the circular cone center line of sealing surface of seat and the butterfly plate center line eccentric angle α to be arranged, between butterfly plate center line and valve rod 8 axis offset P1 is arranged, one offset P2 is arranged between the sealing contact surface of butterfly plate 3 and valve seat 2 and the valve rod axis, and the circular cone taper angle δ of sealing surface of seat designs with the size of valve aperture.Butterfly plate seal ring 4 adopts the adjustable structure that floats, described unsteady adjustable structure is press-fited in the table top of butterfly plate 3 by positioning ring 5 by butterfly plate seal ring 4 and constitutes, butterfly plate seal ring 4 can float by radial elastic under external force, positioning ring 5 is installed in another table top of butterfly plate 3 by screw, and and table top between leave the gap, the movable cooperation between positioning ring 5 and the screw is under the effect of medium power, can be axially relative unsteady between positioning ring 5 and the butterfly plate 3, as shown in Figure 3.
As shown in Figure 2, valve seat 2 sealing surfaces are eccentric tiltedly round platform envelope surface, and butterfly plate seal ring 4 has the sealing surface of positive circumference, adopt interference fit seal between the oval contour of the eccentric tiltedly round platform envelope surface of valve seat 2 sealing surfaces and the positive circumference of butterfly plate seal ring 4.
As shown in Figure 3, the sectional shape of butterfly plate seal ring 4 is approximate U-shaped structure, its sealing surface one side has the obtuse angle to the inclination of valve seat 2 sealing surfaces, opposite side is press-fited on butterfly plate 3 by positioning ring 5, under the effect of sealing pair lateral extrusion power, butterfly plate seal ring 4 can float by radial elastic between positioning ring 5 and butterfly plate 3, adjusts the even of sealing pair circumference specific pressure automatically.Valve seat 2 is installed on valve body 1 table top by socket head screw, and leave the gap between valve body 1 table top, and with socket head screw between cooperate for movable, can axial float 2-3mm under reverse (be B to) pressure medium, simultaneously, pressure medium makes the potted line distending of butterfly plate seal ring 4 by annular space C, with valve seat 2 sealing surface interference fit seal.And under forward (be A to) pressure medium effect, pressure medium makes butterfly plate seal ring 4 and valve seat 2 sealing surface interference fit seal by butterfly plate 3.So,, improve the sealing reliability under forward and reverse working state at forward and reverse working state pressure medium seal pressure of automatic regulating valve door sealing pair all.Be respectively equipped with seal ring 6 between butterfly plate seal ring 4 and the butterfly plate 3 and between valve seat 2 and the valve body 1.
In above embodiment, butterfly plate seal ring 4 can be press-fited by positioning ring 5 by a floating ring constitute unsteady adjustable structure in the table top of butterfly plate 3.
Claims (5)
1, a kind of floating adjustable bidirectional metal hard-sealing butterfly valve, comprise valve body (1), valve seat (2), valve rod, butterfly plate (3) and Sealing and assembling set, butterfly plate (3) is provided with the seal ring (4) that cooperatively interacts with valve seat (2) sealing surface, valve body (1), valve seat (2), valve rod, butterfly plate (3) constitutes three eccentric structures, it is characterized in that butterfly plate seal ring (4) adopts the adjustable structure that floats, described unsteady adjustable structure press-fits formation in the table top of butterfly plate (3) by butterfly plate seal ring (4) by positioning ring (5), butterfly plate seal ring (4) can radial floating, and positioning ring (5) is installed in another table top of butterfly plate (3) by screw.
2, floating adjustable bidirectional metal hard-sealing butterfly valve according to claim 1, the sectional shape that it is characterized in that butterfly plate seal ring (4) is approximate U-shaped structure, its sealing surface one side has to the obtuse angle of valve seat (2) sealing surface inclination, and opposite side is press-fited on butterfly plate by positioning ring (5).
3, floating adjustable bidirectional metal hard-sealing butterfly valve according to claim 1 and 2, it is characterized in that valve seat (2) is installed on valve body (1) table top by socket head screw, and and valve body (1) table top between leave the gap, cooperate for movable between valve seat (2) and the socket head screw, can axial float.
4, floating adjustable bidirectional metal hard-sealing butterfly valve according to claim 1 and 2, it is characterized in that valve seat (2) sealing surface is eccentric tiltedly round platform envelope surface, butterfly plate seal ring (4) has the sealing surface of positive circumference, adopts interference fit seal between the oval contour of the eccentric tiltedly round platform envelope surface of valve seat (2) sealing surface and the positive circumference of butterfly plate seal ring (4).
5, floating adjustable bidirectional metal hard-sealing butterfly valve according to claim 3, it is characterized in that valve seat (2) sealing surface is eccentric tiltedly round platform envelope surface, butterfly plate seal ring (4) has the sealing surface of positive circumference, adopts interference fit seal between the oval contour of the eccentric tiltedly round platform envelope surface of valve seat (2) sealing surface and the positive circumference of butterfly plate seal ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510095647 CN1773150A (en) | 2005-11-08 | 2005-11-08 | Floating adjustable bidirectional metal hard-sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510095647 CN1773150A (en) | 2005-11-08 | 2005-11-08 | Floating adjustable bidirectional metal hard-sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1773150A true CN1773150A (en) | 2006-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510095647 Pending CN1773150A (en) | 2005-11-08 | 2005-11-08 | Floating adjustable bidirectional metal hard-sealing butterfly valve |
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| CN (1) | CN1773150A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865296A (en) * | 2010-06-13 | 2010-10-20 | 无锡智能自控工程有限公司 | Butterfly valve with U-shaped sealing ring |
| CN104989832A (en) * | 2015-07-13 | 2015-10-21 | 方正阀门集团(温州)机械制造有限公司 | Butterfly valve with both-way sealing function |
| CN109357024A (en) * | 2018-11-30 | 2019-02-19 | 江南阀门有限公司 | Double floating sealing structures |
| CN110274035A (en) * | 2019-07-10 | 2019-09-24 | 天虹阀门科技（泉州）有限公司 | Bidirectional bearing double eccentric butterfly valve |
-
2005
- 2005-11-08 CN CN 200510095647 patent/CN1773150A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865296A (en) * | 2010-06-13 | 2010-10-20 | 无锡智能自控工程有限公司 | Butterfly valve with U-shaped sealing ring |
| CN104989832A (en) * | 2015-07-13 | 2015-10-21 | 方正阀门集团(温州)机械制造有限公司 | Butterfly valve with both-way sealing function |
| CN109357024A (en) * | 2018-11-30 | 2019-02-19 | 江南阀门有限公司 | Double floating sealing structures |
| CN110274035A (en) * | 2019-07-10 | 2019-09-24 | 天虹阀门科技（泉州）有限公司 | Bidirectional bearing double eccentric butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20060517 |