CN102620000A - Electric vacuum butterfly valve - Google Patents
Electric vacuum butterfly valve Download PDFInfo
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- CN102620000A CN102620000A CN2012101109500A CN201210110950A CN102620000A CN 102620000 A CN102620000 A CN 102620000A CN 2012101109500 A CN2012101109500 A CN 2012101109500A CN 201210110950 A CN201210110950 A CN 201210110950A CN 102620000 A CN102620000 A CN 102620000A
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- valve
- butterfly plate
- butterfly
- seal ring
- gland
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Abstract
The invention provides an electric vacuum butterfly valve. The electric vacuum butterfly valve comprises an electric actuating mechanism, a valve assembly and a transmission device mounted between the electric actuating mechanism and the valve assembly, wherein the valve assembly comprises a valve body, a butterfly plate, a valve shaft, and an end cover and a gland fixed on the valve body; a filler is filled between the gland and the valve shaft; a compacting mechanism for compacting the filler is mounted on the gland; a rigid valve seat sealing ring is arranged on the valve body; and a butterfly plate sealing ring is mounted on the butterfly plate. According to the electric vacuum butterfly valve, the butterfly plate sealing ring and the valve seat sealing ring are both full stainless steel sealing rings, and an elastic groove is formed in the periphery of the butterfly plate sealing ring, so that the sealing specific pressure between the butterfly plate sealing ring and the valve seat sealing ring is enabled to be proper, the elasticity is good and the plastic deformation cannot be caused, and the sealing performance is excellent; a sealing pair formed by the inner ring of the valve seat sealing ring and the outer ring of the butterfly plate sealing ring enables the butterfly plate and the valve body to contact and separate immediately, so that the valve can be easily and flexibly opened and closed; and due to the arrangement of the compacting mechanism, the sealing performance in the position of the filler is greatly improved so as to greatly prolong the service life of the valve.
Description
Technical field
The present invention relates to the butterfly valve field, especially, relate to a kind of Motorized vacuum butterfly valve.
Background technique
The Motorized vacuum butterfly valve can be installed on thermal power station's feed pump turbine to the exhaust line of main steam turbine condenser inlet; When feed pump turbine need be shut down when carrying out Maintenance and Repair; Must close the Motorized vacuum butterfly valve so that feed pump turbine and main steam turbine condenser are kept apart; To keep the vacuum state of condenser, guarantee the normal operation of main steam turbine.
And the vacuum butterfly valve of domestic existing technology, its seal ring generally adopts T shape rubber seal, or metal and nonmetal composite sealing ring or U-shaped elastic seal ring.The vacuum butterfly valve of rubber seal; Long term exposure is under 120～150 ℃ of steam ambient; High-temperature steam will speed up oxygen diffusion and activation, the oxidation reaction of rubber material, causes the thermal cracking or the heat cross-linking of rubber, so rubber seal is easy to take place the thermo-oxidative ageing reaction; The rubber hardening is followed the string, and causes sealing effect to reduce even forfeiture.The vacuum butterfly valve of metal and nonmetal composite sealing ring, actual what seal is nonmetallic slices.The vapour face of meeting of composite sealing ring receives steam flush during work, and nonmetallic slices is blown to be sent out, as making a painstaking investigation, the long-term back nonmetallic slices that uses becomes flexuose, exists in name only, and causes the sealing effect forfeiture.The vacuum butterfly valve of U-shaped elastic seal ring, its U-shaped elastic seal ring use very thin stainless steel sheets to be stamped to form, and the elasticity hold facility is poor, open and close to reach certain number of times, and permanent plastic deformation often takes place in the sealing contact position, cause sealing effect to descend.
Summary of the invention
The object of the invention is to provide a kind of Motorized vacuum butterfly valve, with vacuum butterfly valve poor sealing that solves existing technology or the technical problem of not growing working life.
For realizing above-mentioned purpose, according to an aspect of the present invention, a kind of Motorized vacuum butterfly valve is provided, comprise electric actuator, valve member and be installed in electric actuator and valve member between transmission device; Valve member comprises valve body and rotates the butterfly plate that is installed in the valve body; Valve member also comprises valve shaft and is fixed on the gland on the valve body that be provided with filler between gland, valve body and the valve shaft, an end of gland is equipped with the hold-down mechanism that compresses filler; Valve body comprises the rigidity valve seat insert, and the inner ring face of valve seat insert is irregular oval inclined-plane; The butterfly plate seal ring is installed on the butterfly plate, and the butterfly plate seal ring is provided with elastic groove towards the periphery of valve seat insert, and the inclined-plane, outer ring of butterfly plate seal ring and the inner ring inclined-plane of valve seat insert adapt.
Further, at interval a plurality of bearings of suit are installed also on the valve shaft, filler is a v-ring, and filler is installed in the space between bearing, hold-down mechanism and valve body and the valve shaft, and spaced apart two fillers install in the opposite direction.
Further, transmission device also comprises heat insulation connecting base, and heat insulation connecting base is installed on the valve shaft, and heat insulation connecting base is connected with bolt with valve body.
Further, valve shaft is the integral type axle that connects butterfly plate.
Further, valve member also comprises the seal ring pressing plate, and the seal ring pressing plate is installed on the butterfly plate, and the butterfly plate seal ring is installed in the outer periphery of butterfly plate, and two opposite flanks of butterfly plate seal ring are pressed on respectively on seal ring pressing plate and the butterfly plate.
Further, valve seat insert and butterfly plate seal ring are the seal ring of all steel.
Further, the drift angle of the sealing pair of the outer ring of the inner ring of valve seat insert and butterfly plate seal ring formation is less than 0.5 °.
Further, the drift angle of sealing pair is 0.3 °.
The present invention has following beneficial effect: the present invention is than existing technology; Butterfly plate seal ring and valve seat insert all are the seal ring of all steel; And the periphery of butterfly plate seal ring is provided with elastic groove; Make that seal pressure between the two is moderate, good springiness and plastic deformation can not take place, sealability is better; And the sealing pair that the outer ring of the inner ring of valve seat insert and butterfly plate seal ring forms makes butterfly plate and valve body can realize that moment contacts and moment breaks away from, and makes the valve opening and closing easy and flexible; The installation of hold-down mechanism make the filler place sealability and obtained working life significantly improving.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is that the master of Motorized vacuum butterfly valve under open mode of the preferred embodiment of the present invention looks schematic representation;
Fig. 2 is that schematic representation is looked on the left side of Motorized vacuum butterfly valve under in off position of the preferred embodiment of the present invention;
Fig. 3 is the partial schematic diagram at the Motorized vacuum butterfly valve seal position of the preferred embodiment of the present invention; And
Fig. 4 is the partial schematic diagram at the Motorized vacuum butterfly valve filler position of the preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1 and Fig. 2, the Motorized vacuum butterfly valve of the preferred embodiment of the present invention, comprise electric actuator 1, valve member 3, heat insulation connecting base 22 and be connected electric actuator 1 and valve member 3 between transmission device 2.
Valve member 3 comprises that valve body 31, rotation are installed on the butterfly plate 32 in the valve body 31 and are installed in the seal ring pressing plate 37 on the butterfly plate 32.
Please combine referring to Fig. 3, valve body 31 adopts the eccentric design of a young waiter in a wineshop or an inn, and valve body 31 also comprises valve seat insert 311.Preferably, valve seat insert 311 is the seal ring of all steel, and its inner ring is irregular ellipse.And the inner ring face of this valve seat insert 311 is the inclined-plane, and the outer ring face of this valve seat insert 311 is fixedly mounted in the inner chamber of valve body 31.
The shape of the inner ring face of the shape of the outer periphery of butterfly plate 32 and valve seat insert 311 adapts, and butterfly plate 32 also adopts the eccentric design of a young waiter in a wineshop or an inn, to improve two way sealed characteristic of the present invention.
The outer periphery of butterfly plate 32 have a breach near the end that seal ring pressing plate 37 is installed, and butterfly plate seal ring 38 is installed in the breach, and two opposite flanks of butterfly plate seal ring are pressed on respectively on seal ring pressing plate 37 and the butterfly plate 32.And butterfly plate 32 is with the fixing butterfly plate seal ring 38 of seal ring pressing plate 37.Preferably, butterfly plate seal ring 38 is the seal ring of all steel.The outer ring face of butterfly plate seal ring 38 is the inclined-plane that adapts with the inner ring of valve seat insert 311; The inner ring face contact seal of the outer ring face of butterfly plate seal ring 38 and valve seat insert 311; Therefore the sealing pair of valve seat insert 311 and 38 formation of butterfly plate seal ring is that asymmetrical conical surface seal is secondary; The secondary drift angle of sealing should be less than 0.5 °, so that butterfly plate 32 rotates required torque ratio is less, makes butterfly plate seal ring 38 and valve seat insert 311 can realize the disengaging of contacting of moment and moment.Preferably, this drift angle is 0.3 °.The outer ring face of butterfly plate seal ring 38 also has an elastic groove 381; Elastic groove 381 is towards valve seat insert 311; So that butterfly plate seal ring 38 is the rubber-like metal-seated with the sealing pair that valve seat insert 311 forms, make seal pressure constant, elasticity is permanent; Sealing effect is improved significantly, and is simultaneously wear-resistant.Even use the present invention for a long time, can not produce plastic deformation yet, increased working life of the present invention.
See also Fig. 4, valve member 2 comprises valve shaft 33 and is installed in the filler 35 and bearing 36 on the valve shaft 33.Valve shaft 33 is the integral type axle that connects butterfly plate 32, and the rigidity of integral type axle is relatively good, and when butterfly plate 32 bore certain pressure, the distortion meeting of valve shaft 33 was smaller.Valve shaft 33 is installed in the valve body 31, and first end of valve shaft 33 is connected 33 rotations of electric actuator 1 drive transmission 2 drive valve shafts with transmission device 2.The middle part of valve shaft 33 also is fixedly connected with pin with butterfly plate 32, and the rotation of valve shaft 33 is passed to butterfly plate 32, and butterfly plate 32 is rotated thereupon.In other mode of execution, valve shaft 33 can be connected through spline, taper pin or square toes matching and fixing with butterfly plate 32, makes butterfly plate 32 rotate along with the rotation of valve shaft 33.
Spaced apart filler 35 and bearing 36 are installed in the space between valve shaft 33 and valve body 31.Filler 35 adopts v-rings, and preferably, it is in the opposite direction that spaced apart two places' v-rings are installed so that pressure medium of the present invention when big more sealing effect good more, and can realize the effect of two-way hermetic seal zero leakage.The bearing 36 at two places adopts the sliding bearing of selflubricatings, and when for a long time not during oil injecting lubricating, bearing 36 also can proper functioning.And two bearing 36 separation have increased the distance that supports valve shaft 33, have reduced the wearing and tearing of bearing 36.
Valve member 3 also comprises a gland 341 and the gland 342 that is installed in gland first end, and gland 341 is pressed on the gland 342, and gland 342 is pressed on the filler 35.Preferably, at second end of gland 341 hold-down mechanism 34 that folded spring bolt group constitutes is installed, hold-down mechanism 34 is connected with valve body 31 through long bolt.Hold-down mechanism 34 acts on gland 341, and gland 341 remakes and is used for gland 342, and gland 342 is given filler 35 with force transmission again, so that the impacting force basically identical that filler 35 receives, further guarantees the sealing effect at filler 35 places.
Please combine once more with reference to Fig. 1, transmission device 2 comprises Worm gear case 21 and heat insulation connecting base 22, and heat insulation connecting base 21 is installed between valve body 31 and the Worm gear case 21, and is connected through bolt with valve body 31.When the heat transfer of pipeline internal medium during to heat insulation connecting base 22, heat insulation connecting base 22 can dissipate the part heat, and the heat that is delivered to transmission device 2 and electric actuator 1 will be seldom, and lowers the temperature for filler, increases working life of the present invention.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. Motorized vacuum butterfly valve comprises: electric actuator (1), valve member (3) and be installed in said electric actuator (1) and said valve member (3) between transmission device (2); Said valve member (3) comprises that valve body (31) and rotation are installed on the butterfly plate (32) in the said valve body (31); It is characterized in that:
Said valve member (3) comprises valve shaft (33) and is fixed on gland (341) and the gland (342) on the said valve body (31),
Be provided with filler (35) between said gland (341), gland (342), said valve body (31) and the said valve shaft (33),
One end of said gland (341) is equipped with the hold-down mechanism (34) that compresses said filler (35);
Said valve body (31) comprises rigidity valve seat insert (311), and the inner ring face of said valve seat insert (311) is irregular oval inclined-plane;
Butterfly plate seal ring (38) is installed on the said butterfly plate (32); Said butterfly plate seal ring (38) is provided with elastic groove (381) towards the periphery of said valve seat insert (311), and the inner ring inclined-plane of the inclined-plane, outer ring of said butterfly plate seal ring (38) and said valve seat insert (311) adapts.
2. Motorized vacuum butterfly valve according to claim 1; It is characterized in that; A plurality of bearings (36) of suit at interval also are installed on the said valve shaft (33); Said filler (35) is a v-ring, and said filler (35) is installed in the space between said bearing (36), hold-down mechanism (34) and said valve body (31) and the said valve shaft (33), and every spaced apart two said fillers (35) install in the opposite direction.
3. Motorized vacuum butterfly valve according to claim 1; It is characterized in that; Said transmission device (2) comprises Worm gear case (21) and heat insulation connecting base (22), and said heat insulation connecting base (22) is installed on the said valve shaft (33), and said heat insulation connecting base (22) is connected through bolt with said valve body (31).
4. Motorized vacuum butterfly valve according to claim 1 is characterized in that, said valve shaft (33) is for connecting the integral type axle of said butterfly plate (32).
5. Motorized vacuum butterfly valve according to claim 1; It is characterized in that; Said valve member (3) also comprises seal ring pressing plate (37); Said seal ring pressing plate (37) is installed on the said butterfly plate (32), and said butterfly plate seal ring (38) is installed in the outer periphery of said butterfly plate (32), and two opposite flanks of said butterfly plate seal ring (38) are pressed on respectively on said seal ring pressing plate (37) and the said butterfly plate (32).
6. Motorized vacuum butterfly valve according to claim 1 is characterized in that, said valve seat insert (311) and said butterfly plate seal ring (38) are the seal ring of all steel.
7. Motorized vacuum butterfly valve according to claim 6 is characterized in that, the drift angle of the sealing pair that the outer ring of the inner ring of said valve seat insert (311) and said butterfly plate seal ring (38) forms is less than 0.5 °.
8. Motorized vacuum butterfly valve according to claim 7 is characterized in that, the drift angle of said sealing pair is 0.3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210110950.0A CN102620000B (en) | 2012-04-16 | 2012-04-16 | Electric vacuum butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210110950.0A CN102620000B (en) | 2012-04-16 | 2012-04-16 | Electric vacuum butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102620000A true CN102620000A (en) | 2012-08-01 |
| CN102620000B CN102620000B (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210110950.0A Active CN102620000B (en) | 2012-04-16 | 2012-04-16 | Electric vacuum butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102620000B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952498A (en) * | 2016-04-28 | 2016-09-21 | 中广核核电运营有限公司 | Method for handling jamming of pressure cylinder valve in steam turbine |
| CN106895162A (en) * | 2015-12-18 | 2017-06-27 | 安徽方兴实业（集团）有限公司 | A kind of upper sealing device of butterfly valve |
| CN114367769A (en) * | 2021-12-27 | 2022-04-19 | 武汉锂鑫智造工程有限公司 | Welding flux supplying and recycling integrated box |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020130290A1 (en) * | 2000-12-02 | 2002-09-19 | Gerhard Oberbeck | Shut-off device with a swivellable butterfly valve and an entropy-elastic annular seal held on a backup ring |
| US20050029483A1 (en) * | 2003-08-06 | 2005-02-10 | Bancroft Philip W. | Valve seal with pressure relief channels and expansion voids |
| CN1650124A (en) * | 2003-03-28 | 2005-08-03 | 株式会社巴技术研究所 | Butterfly valve |
| CN1924411A (en) * | 2005-08-31 | 2007-03-07 | 黄作兴 | Vacuum butterfly valve |
| CN201028004Y (en) * | 2007-04-18 | 2008-02-27 | 汤仁义 | Tri-eccentric multilayer sealing butterfly valve |
| CN201166126Y (en) * | 2008-03-14 | 2008-12-17 | 严胜春 | Water seal butterfly valve |
| CN201902575U (en) * | 2010-11-17 | 2011-07-20 | 上海凯莱阀门有限公司 | Double eccentric butterfly valve with composite butterfly plate seal ring |
| CN202733008U (en) * | 2012-04-16 | 2013-02-13 | 株洲南方阀门股份有限公司 | Motor-driven vacuum butterfly valve |
-
2012
- 2012-04-16 CN CN201210110950.0A patent/CN102620000B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020130290A1 (en) * | 2000-12-02 | 2002-09-19 | Gerhard Oberbeck | Shut-off device with a swivellable butterfly valve and an entropy-elastic annular seal held on a backup ring |
| CN1650124A (en) * | 2003-03-28 | 2005-08-03 | 株式会社巴技术研究所 | Butterfly valve |
| US20050029483A1 (en) * | 2003-08-06 | 2005-02-10 | Bancroft Philip W. | Valve seal with pressure relief channels and expansion voids |
| CN1924411A (en) * | 2005-08-31 | 2007-03-07 | 黄作兴 | Vacuum butterfly valve |
| CN201028004Y (en) * | 2007-04-18 | 2008-02-27 | 汤仁义 | Tri-eccentric multilayer sealing butterfly valve |
| CN201166126Y (en) * | 2008-03-14 | 2008-12-17 | 严胜春 | Water seal butterfly valve |
| CN201902575U (en) * | 2010-11-17 | 2011-07-20 | 上海凯莱阀门有限公司 | Double eccentric butterfly valve with composite butterfly plate seal ring |
| CN202733008U (en) * | 2012-04-16 | 2013-02-13 | 株洲南方阀门股份有限公司 | Motor-driven vacuum butterfly valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895162A (en) * | 2015-12-18 | 2017-06-27 | 安徽方兴实业（集团）有限公司 | A kind of upper sealing device of butterfly valve |
| CN105952498A (en) * | 2016-04-28 | 2016-09-21 | 中广核核电运营有限公司 | Method for handling jamming of pressure cylinder valve in steam turbine |
| CN114367769A (en) * | 2021-12-27 | 2022-04-19 | 武汉锂鑫智造工程有限公司 | Welding flux supplying and recycling integrated box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102620000B (en) | 2014-02-26 |
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