CN105757315A - Dual-positioning multilayer rigid sealing butterfly valve - Google Patents
Dual-positioning multilayer rigid sealing butterfly valve Download PDFInfo
- Publication number
- CN105757315A CN105757315A CN201610250148.XA CN201610250148A CN105757315A CN 105757315 A CN105757315 A CN 105757315A CN 201610250148 A CN201610250148 A CN 201610250148A CN 105757315 A CN105757315 A CN 105757315A
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- butterfly
- valve body
- transmission case
- gear
- rod
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/05—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor specially adapted for operating hand-operated valves or for combined motor and hand operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/221—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves specially adapted operating means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a dual-positioning multilayer rigid sealing butterfly valve.The butterfly valve comprises a butterfly valve body, the butterfly valve body comprises a valve body, a transmission device, a butterfly plate, a power device, a hand wheel and a support shaped like a Chinese character 'mu', the support shaped like the Chinese character 'mu' is arranged between the transmission device and the valve body, the butterfly plate is arranged in the valve body, and the power device is a motor.The transmission device comprises a transmission case, a butterfly rod, a hand power amplification mechanism, a planetary gear mechanism and a shifting fork are arranged in the transmission case, the butterfly rod is sleeved with a second driven gear, a first friction disc is arranged at the upper end of the butterfly rod, the lower end of the butterfly rod extends out of the lower end face of the transmission case, and the lower end of the butterfly rod penetrates through the valve body and is connected with the upper end of the butterfly plate.When the dual-positioning multilayer rigid sealing butterfly valve is in the electric control state, power transmission between an output shaft and the butterfly rod is transmitted through the friction discs, when the butterfly plate needs to be manually rotated to be opened and closed, the butterfly rod can be separated from the electric transmission device by separating the first friction disc from a second friction disc, an electric transmission part mechanism needs not be driven to rotate, and intensity of manually operation is alleviated.
Description
Technical field
The present invention relates to valve field, be specifically related to a kind of Dual positioning multilamellar hard seal butterfly valve.
Background technology
Progress along with industrial technology, butterfly valve is applied to every field, butterfly valve is again flap valve, it it is the adjustment valve of a kind of simple in construction, simultaneously can be used for the on-off control of low pressure pipeline medium, butterfly valve refers to that closure member is disk, rotates a kind of valve reaching to open and close around valve rod, acts primarily as cut-out and throttling action on pipeline.Butterfly valve opening and closing element is a discoidal butterfly plate, rotate around the axis of himself in valve body, thus reaching the purpose opening and closing or regulating, butterfly valve is carried on the pipeline of various corrosivity, non-corrosive fluids medium suitable in the engineering systems such as producer, coal gas, natural gas, liquefied petroleum gas, town gas, air, chemical industry smelting and generation environment-friendly, for regulating and block the flowing of medium, therefore, various pipelines are carried material to play an important role by the performance of butterfly valve.
Conventional butterfly valve is electric butterfly valve, Pneumatic butterfly valve, hydraulic butterfly valve and Hand-operated butterfly valve at present, but these butterfly valves all Shortcomings, on some Large Electric butterfly valves, it is all the switch and the Guan Bi that drive butterfly plate by electric performance device.But running into power failure, when butterfly valve needs emergency adjustment, it is necessary to gone switch and the Guan Bi of manual adjustments electric butterfly valve valve plate by operator.Although having at present electric butterfly valve design on the market have manual operation system, but in manual operation system, design simple coarse, often through shake motor main shaft or directly rotate butterfly bar and drive butterfly bar butterfly plate switch to close.And the butterfly plate weight of Large Electric butterfly valve is big, the moment of resistance is very big.After adding use a period of time, valve plate produces stifled card owing to corrosion lacks lubrication, and return difference is big, and action is insensitive.When using manual operation, restriction due to locus and handwheel size, only small in the moment manually applied, it is very painstaking that butterfly pole pair butterfly plate carries out switching and close, labor intensive, it is difficult to accurately quickly control the opening and closing of butterfly plate, in some dangerous materials commercial production, if operation reaction is not in time, it is easy to produce industrial accident.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is proposed to a kind of Dual positioning multilamellar hard seal butterfly valve, concrete technical scheme is as follows:
A kind of Dual positioning multilamellar hard seal butterfly valve, it is characterized in that: include butterfly valve body, described butterfly valve body includes valve body (1), actuating device, butterfly plate (3), power set (4), handwheel (5) and order font support (27), described order font support (27) is arranged between described actuating device (4) and described valve body (1), and described butterfly plate (3) is arranged in described valve body (1)；
Described actuating device includes transmission case (6), this transmission case (6) is respectively arranged with butterfly bar (7), manual force enlarger, planetary gears and fork (8), described butterfly bar (7) is arranged with the second driven gear (9), this butterfly bar (7) upper end is provided with the first frictional disk (10), described butterfly bar (7) lower end is stretched out from described casing (6) lower surface, and after described butterfly bar (7) lower end sequentially passes through described order font support (27) and described valve body (1), described butterfly bar (7) is connected with described butterfly plate (3) upper end；
Described planetary gears includes gear ring (11), pinion frame (12), planetary gear (13), sun gear (14) and output shaft (15), described output shaft (15) is arranged on described pinion frame (12), and described output shaft (15) and described butterfly bar (7) are coaxially disposed, described power set (4) are arranged on described transmission case (6) upper surface, described power set (4) outfan is inserted in described sun gear (14) axis hole through described transmission case (6) upper surface, it is arranged with the second frictional disk (16) in described output shaft (15) lower end, this second frictional disk (16) matches with described first frictional disk (10)；
Annular groove is offered at described second frictional disk (16) excircle, described fork (8) is hinged on the pedestal that described transmission case (6) inwall is arranged, and described fork (8) first end stretches into annular groove and matches with described annular groove, it is outside that described fork (8) second end reaches transmission case (6), and described fork (8) can drive described second frictional disk (16) to slide axially along output shaft (15)；
nullDescribed force amplificatory structure includes driving shaft (18)、Power transmission shaft (19)、Fixing axle (20)、Side link (21)、Connecting rod (22) and lever (23)，Described driving shaft (18) upper end is stretched out from described transmission case (6) upper surface，Described handwheel (5) is arranged on described driving shaft (18) upper end，Described driving shaft (18) is arranged with the first driving gear (24)，Described power transmission shaft (19) is arranged with the first driven gear (25)，Described first driving gear (24) is mutually meshing with described first driven gear (25)，Described side link (21) one end is installed on described power transmission shaft (19)，Described lever (23) middle part is hinged on described fixing axle (20)，Described lever (23) one end and described connecting rod (22) one end are hinged，Described connecting rod (22) free end and described side link (21) free end are hinged，Described lever (23) free end is provided with sector gear (26)，This sector gear (26) is mutually meshing with described second driven gear (9).
The present invention is realized in, under electric control state, power set outfan drives output shaft rotation after planetary gear speed-reduction, and the second frictional disk is axially slided along output shaft and coordinates with the first frictional disk by fork, output shaft can drive butterfly bar to rotate, and butterfly bar drives butterfly plate folding.Under needs manual operation state, rotate handwheel, first driving gear drives the first driven gear to rotate, power transmission shaft drives side link to rotate, connecting rod drivening rod moves, connecting rod pull lever, and sector gear drives the second driven gear to rotate, second driven gear drives butterfly bar to rotate, and butterfly bar controls butterfly plate folding.
To better implement the present invention, may further be:
Described lever (23) is L-shaped bar, this L-shaped bar includes the first rod member and the second rod member, this first rod member and described connecting rod (22) are hinged, and described second rod free end arranges sector gear (26), and described first rod member length is more than described second rod member length.First rod member length is more than the second rod member, and when the first rod member is applied active force, due to leverage, the power of sector gear output is exaggerated further.
Described fork (8) second end is provided with handle (17).
The invention have the benefit that relatively conventional electric butterfly valve is generally all directly drive butterfly bar to rotate in Non-follow control, when to macrotype butterfly valve manual operation, operation is painstaking, it has not been convenient to.The present invention is under electric control state, power between output shaft and butterfly bar is transmitted by frictional disk when transmitting, when needs hand rotation butterfly plate folding, can pass through to make the first frictional disk and the second frictional disk separate, butterfly bar is separated with electric transmission machanism, do not need driving electric running part mechanism to rotate, alleviate the intensity of manual operation.In force amplificatory structure, rotating handwheel, the first driving gear drives the first driven gear to rotate, it is achieved first order power is amplified.Power transmission shaft drives side link to rotate, and connecting rod drivening rod moves, connecting rod pull lever, and sector gear drives the second driven gear to rotate.Amplify owing to leverage realizes second time power.Second driven gear drives butterfly bar to rotate, and butterfly bar controls butterfly plate folding.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is the B-B sectional view of Fig. 2；
Fig. 4 is the C-C sectional view of Fig. 2；
Fig. 5 is the D-D sectional view of Fig. 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention being made apparent clear and definite defining.
As shown in Figures 1 to 5: a kind of Dual positioning multilamellar hard seal butterfly valve, including butterfly valve body, butterfly valve body includes valve body 1, actuating device, butterfly plate 3, power set 4, handwheel 5 and order font support 27, order font support 27 is arranged between actuating device 4 and valve body 1, butterfly plate 3 is arranged in valve body 1, and these power set 4 are motor；
Actuating device includes transmission case 6, this transmission case 6 is respectively arranged with butterfly bar 7, manual force enlarger, planetary gears and fork 8, butterfly bar 7 is arranged with the second driven gear 9, this butterfly bar 7 upper end is provided with the first frictional disk 10, butterfly bar 7 lower end is stretched out from transmission case 6 lower surface, and after butterfly bar 7 lower end sequentially passes through order font support 27 and valve body 1, butterfly bar 7 is connected with butterfly plate 3 upper end；
Planetary gears includes gear ring 11, pinion frame 12, planetary gear 13, sun gear 14 and output shaft 15, output shaft 15 is arranged on pinion frame 12, and output shaft 15 is coaxially disposed with butterfly bar 7, power set 4 are arranged on transmission case 6 upper surface, power set 4 outfan is inserted in sun gear 14 axis hole through transmission case 6 upper surface, is arranged with the second frictional disk 16 in output shaft 15 lower end, and this second frictional disk 16 matches with the first frictional disk 10；
Annular groove is offered at the second frictional disk 16 excircle, fork 8 is hinged on the pedestal that transmission case 6 inwall is arranged, and fork 8 first end stretches into annular groove and matches with annular groove, it is outside that fork 8 second end reaches transmission case 6, fork 8 can drive the second frictional disk 16 to slide axially along output shaft 15, and fork 8 second end is provided with handle 17.
Force amplificatory structure includes driving shaft 18, power transmission shaft 19, fixing axle 20, side link 21, connecting rod 22 and lever 23, lever 23 is L-shaped bar, this L-shaped bar includes the first rod member and the second rod member, this first rod member and connecting rod 22 are hinged, second rod free end arranges sector gear 26, and the first rod member length is more than the second rod member length.First rod member length is more than the second rod member.Driving shaft 18 upper end is stretched out from transmission case 6 upper surface, handwheel 5 is arranged on driving shaft 18 upper end, driving shaft 18 is arranged with the first driving gear 24, power transmission shaft 19 is arranged with the first driven gear 25, first driving gear 24 is mutually meshing with the first driven gear 25, side link 21 one end is installed on power transmission shaft 19, it is hinged on fixing axle 20 in the middle part of lever 23, first rod free end and connecting rod 22 one end are hinged, connecting rod 22 free end and side link 21 free end are hinged, second rod free end is provided with sector gear 26, this sector gear 26 is mutually meshing with the second driven gear 9.
Claims (3)
1. a Dual positioning multilamellar hard seal butterfly valve, it is characterized in that: include butterfly valve body, described butterfly valve body includes valve body (1), actuating device, butterfly plate (3), power set (4), handwheel (5) and order font support (27), described order font support (27) is arranged between described actuating device (4) and described valve body (1), and described butterfly plate (3) is arranged in described valve body (1)；
Described actuating device includes transmission case (6), this transmission case (6) is respectively arranged with butterfly bar (7), manual force enlarger, planetary gears and fork (8), described butterfly bar (7) is arranged with the second driven gear (9), this butterfly bar (7) upper end is provided with the first frictional disk (10), described butterfly bar (7) lower end is stretched out from described casing (6) lower surface, and after described valve rod (7) lower end sequentially passes through described order font support (27) and described valve body (1), described butterfly bar (7) is connected with described butterfly plate (3) upper end；
Described planetary gears includes gear ring (11), pinion frame (12), planetary gear (13), sun gear (14) and output shaft (15), described output shaft (15) is arranged on described pinion frame (12), and described output shaft (15) and described butterfly bar (7) are coaxially disposed, described power set (4) are arranged on described transmission case (6) upper surface, described power set (4) outfan is inserted in described sun gear (14) axis hole through described transmission case (6) upper surface, it is arranged with the second frictional disk (16) in described output shaft (15) lower end, this second frictional disk (16) matches with described first frictional disk (10)；
Annular groove is offered at described second frictional disk (16) excircle, described fork (8) is hinged on the pedestal that described transmission case (6) inwall is arranged, and described fork (8) first end stretches into annular groove and matches with described annular groove, it is outside that described fork (8) second end reaches transmission case (6), and described fork (8) can drive described second frictional disk (16) to slide axially along output shaft (15)；
nullDescribed force amplificatory structure includes driving shaft (18)、Power transmission shaft (19)、Fixing axle (20)、Side link (21)、Connecting rod (22) and lever (23)，Described driving shaft (18) upper end is stretched out from described transmission case (6) upper surface，Described handwheel (5) is arranged on described driving shaft (18) upper end，Described driving shaft (18) is arranged with the first driving gear (24)，Described power transmission shaft (19) is arranged with the first driven gear (25)，Described first driving gear (24) is mutually meshing with described first driven gear (25)，Described side link (21) one end is installed on described power transmission shaft (19)，Described lever (23) middle part is hinged on described fixing axle (20)，Described lever (23) one end and described connecting rod (22) one end are hinged，Described connecting rod (22) free end and described side link (21) free end are hinged，Described lever (23) free end is provided with sector gear (26)，This sector gear (26) is mutually meshing with described second driven gear (9).
2. Dual positioning multilamellar hard seal butterfly valve according to claim 1, it is characterized in that: described lever (23) is L-shaped bar, this L-shaped bar includes the first rod member and the second rod member, this first rod member and described connecting rod (22) are hinged, described second rod free end arranges sector gear (26), and described first rod member length is more than described second rod member length.
3. Dual positioning multilamellar hard seal butterfly valve according to claim 1, it is characterised in that: described fork (8) second end is provided with handle (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610250148.XA CN105757315B (en) | 2016-04-21 | 2016-04-21 | Dual positioning multilayer hard seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610250148.XA CN105757315B (en) | 2016-04-21 | 2016-04-21 | Dual positioning multilayer hard seal butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105757315A true CN105757315A (en) | 2016-07-13 |
| CN105757315B CN105757315B (en) | 2018-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610250148.XA Active CN105757315B (en) | 2016-04-21 | 2016-04-21 | Dual positioning multilayer hard seal butterfly valve |
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| Country | Link |
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| CN (1) | CN105757315B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488464A (en) * | 2018-04-27 | 2018-09-04 | 搜派师自动化科技有限公司 | A kind of intelligence rotary power unit |
| CN109084029A (en) * | 2018-09-21 | 2018-12-25 | 双恒阀门集团有限公司 | Combustion gas flow regulating valve |
| CN110307382A (en) * | 2019-08-15 | 2019-10-08 | 上海阀门厂股份有限公司 | A kind of part of revolving valves headstock gear |
| CN112303273A (en) * | 2020-10-10 | 2021-02-02 | 盐城市锦东液压机械有限公司 | Collect manual and automatic operation in ball valve of an organic whole |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952181A (en) * | 2006-11-20 | 2007-04-25 | 世林（漯河）冶金设备有限公司 | Crank cut-off valve |
| DE102013105839A1 (en) * | 2013-06-06 | 2014-12-11 | Pierburg Gmbh | Actuating device and flap device with such an actuator |
| CN104976360A (en) * | 2014-04-10 | 2015-10-14 | 江苏神通阀门股份有限公司 | High-pressure balance butterfly valve |
| CN204729662U (en) * | 2015-05-13 | 2015-10-28 | 重庆云陆阀门制造有限公司 | The ultra-thin modulating valve of a kind of many performances of Dual positioning |
| CN204729653U (en) * | 2015-04-30 | 2015-10-28 | 重庆云陆阀门制造有限公司 | A kind of hard seal butterfly valve being provided with eccentric multi-level valve plate |
| CN105221768A (en) * | 2015-10-31 | 2016-01-06 | 河北工业大学 | A kind of double rocking lever is without friction hard-sealing butterfly valve |
-
2016
- 2016-04-21 CN CN201610250148.XA patent/CN105757315B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952181A (en) * | 2006-11-20 | 2007-04-25 | 世林（漯河）冶金设备有限公司 | Crank cut-off valve |
| DE102013105839A1 (en) * | 2013-06-06 | 2014-12-11 | Pierburg Gmbh | Actuating device and flap device with such an actuator |
| CN104976360A (en) * | 2014-04-10 | 2015-10-14 | 江苏神通阀门股份有限公司 | High-pressure balance butterfly valve |
| CN204729653U (en) * | 2015-04-30 | 2015-10-28 | 重庆云陆阀门制造有限公司 | A kind of hard seal butterfly valve being provided with eccentric multi-level valve plate |
| CN204729662U (en) * | 2015-05-13 | 2015-10-28 | 重庆云陆阀门制造有限公司 | The ultra-thin modulating valve of a kind of many performances of Dual positioning |
| CN105221768A (en) * | 2015-10-31 | 2016-01-06 | 河北工业大学 | A kind of double rocking lever is without friction hard-sealing butterfly valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488464A (en) * | 2018-04-27 | 2018-09-04 | 搜派师自动化科技有限公司 | A kind of intelligence rotary power unit |
| CN109084029A (en) * | 2018-09-21 | 2018-12-25 | 双恒阀门集团有限公司 | Combustion gas flow regulating valve |
| CN109084029B (en) * | 2018-09-21 | 2023-10-31 | 双恒阀门集团有限公司 | Gas flow regulating valve |
| CN110307382A (en) * | 2019-08-15 | 2019-10-08 | 上海阀门厂股份有限公司 | A kind of part of revolving valves headstock gear |
| CN112303273A (en) * | 2020-10-10 | 2021-02-02 | 盐城市锦东液压机械有限公司 | Collect manual and automatic operation in ball valve of an organic whole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105757315B (en) | 2018-09-18 |
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