CN106122575A - A kind of mechanical electric magnetic-type gas emergency cut-off valve - Google Patents
A kind of mechanical electric magnetic-type gas emergency cut-off valve Download PDFInfo
- Publication number
- CN106122575A CN106122575A CN201610517472.3A CN201610517472A CN106122575A CN 106122575 A CN106122575 A CN 106122575A CN 201610517472 A CN201610517472 A CN 201610517472A CN 106122575 A CN106122575 A CN 106122575A
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- China
- Prior art keywords
- valve
- hook
- cam
- flap
- type gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
- F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
Abstract
The invention discloses a kind of mechanical electric magnetic-type gas emergency cut-off valve, including valve body, housing, valve gap, spool, flap, back-moving spring and actuator, its spool includes mandrel, connecting rod, cam and hook, the bottom of mandrel is connected with flap, middle part is slidably sealingly mounted on valve body, the top of mandrel is stretched into the interior lower end with connecting rod of housing and is hinged, cam is the most rotating with hook to be arranged on housing, one end of cam is hinged with the upper end of connecting rod, and the other end is provided with and links up with the projection matched；The bottom of hook offsets with actuator, and upper end is hooked on the projection of cam by back-moving spring II.The mechanical electric magnetic-type gas emergency cut-off valve of the present invention, the most capable of fast starting, can resist complexity pipeline pressure, simple in construction, safe and reliable, be hardly damaged, service life is long, suitable popularization and application.
Description
Technical field
The present invention relates to a kind of gas alarm system, be specifically related to a kind of gas cut off valve, especially relate to a kind of machinery
Electromagnetic gas quick action emergency valve.
Background technology
Gradually relax control along with gas is utility, developing rapidly of gas industry, natural gas, liquefied gas, coal gas
Obtain the most universal in China Deng pipe gas.Using of combustion gas brings great convenience to the life of people, effectively carries
The high quality of life of the people, decrease environmental pollution.But bring many disasters, combustion gas the most also to the life of people
Poisoning that leakage causes, blast, the security incident such as fire happen occasionally, and bring huge loss to the people's lives and property,
Become emphasis and focus that gas industry is paid close attention to the most.
Gas emergency cut-off valve be mounted in combustion gas storage tank/pipeline exit urgent time can the valve of fast shut-off, when
The manifold pressure that stop valve is controlled is too high or less than when cutting off setting pressure, safety cut-off valve can be with emergency cut-off pipeline
Air-flow, protects upstream device.Utilize electromagnetic valve to control the closedown of valve, be one of the most more satisfactory relief valve.But mesh
Front gas emergency cut-off valve is the most all that the structure using valve rod to coordinate with spring realizes cutting off.But time actually used, especially
Being that pipeline pressure changes greatly in domestic gas total pipeline or industrial fuel gas pipeline, current stop valve is when in pipeline
Negative pressure bigger time, it is easy to close, it is impossible to combustion gas is effectively ensured and uses safety by mistake.And at pipeline pressure more than 2kg/cm2Time very
Difficult release realizes emergency cut-off；And in actually used, manifold pressure is complicated and changeable, reach 4kg/cm2So that 6kg/cm2It is all
How the most common situation, develop one and adapt to the change of manifold pressure complexity and at manifold pressure more than 4kg/cm2
In the case of remain to normally use stop valve become the technical barrier that this area is urgently to be resolved hurrily.
Summary of the invention
For the defect of spool in prior art, it is an object of the invention to provide a kind of can bear bigger pipeline pressure,
Ensure that combustion gas uses the mechanical electric magnetic-type gas emergency cut-off valve of safety.
For reaching above-mentioned purpose, present invention employs techniques below scheme:
A kind of mechanical electric magnetic-type gas emergency cut-off valve, including valve body, valve gap, spool, the flap being arranged in valve body and
Back-moving spring, and actuator, the bottom of spool is arranged in valve body, and the outside of valve body is led to and in actuator in top
Controlling lower flap unlatching and the Guan Bi of driving, wherein, described valve body top fixedly mounts a housing, and described spool uses cam machine
Structure, including mandrel, connecting rod, cam and hook, the bottom of mandrel is connected with flap, and middle part is slidably sealingly mounted at valve body
On, the top of mandrel is stretched into the interior lower end with connecting rod of housing and is hinged, and the middle part of cam and hook is the most rotating is arranged on shell
On body, one end of cam is hinged with the upper end of connecting rod, and the other end is provided with and links up with the projection matched；Hook bottom with hold
Row mechanism offsets, and upper end is hooked on the projection of cam by a back-moving spring II being fixedly mounted on housing.
Optionally, the middle part of described cam offers a through hole, an affixed cam rotating shaft in through hole, and described cam rotates
The two ends of axle are rotating to be arranged on housing, it is arranged with cam and fixes sleeve.
Optionally, one end of described cam rotating shaft fixedly mounts a handwheel.
Optionally, described housing offers an article putting groove, place in article putting groove one with handwheel with the use of valve opening help
Power rod.
Optionally, described hook middle and upper part offers a through hole, installs a hook locating shaft in through hole, and described hook is fixed
The two ends of position axle are fixedly mounted on housing, and it is arranged with the fixing sleeve of hook, and hook can rotate around hook locating shaft.
Optionally, described hook is provided with a steady pin matched with back-moving spring II.
Optionally, being provided with a horizontal gear shaft between described hook and connecting rod, horizontal gear shaft two ends are fixedly mounted on housing
On.
Optionally, perforate offer annular groove in hole week in the middle part of described flap, a class cross flap connector is close
Envelope is arranged in annular groove, is fixed together bottom the upper end of flap connector and mandrel, and lower end passes in the middle part of flap
Hole and be fixedly mounted on flap by an inducing QI nut.
Optionally, described mandrel, flap and flap connector all use copper material to make.
Optionally, between described valve body and valve gap, all it is tightly connected by sealing ring between described mandrel and valve body.
Owing to using above technical scheme, the present invention possesses following technique effect:
1. the mechanical electric magnetic-type gas emergency cut-off valve of the present invention, spool uses mechanical linkage type structure, by cam, extension
Being linked of hook, connecting rod and mandrel, realizes unlatching and the Guan Bi of flap, thus is suitable for gas pipeline with gravity and mechanical force
The biggest pressure change, effectively solves spool and is difficult to discharge and the too high electromagnetic valve caused of negative pressure under pipeline pressure is excessive
Miss the problems such as pass.Test through repeatedly effectiveness, at manifold pressure more than 4kg/cm2In the case of still can stablize and normally realize
Cut off, also can reach to bear 6kg/cm according to using needs2、8kg/cm2The most higher pipeline pressure, is effectively guaranteed
The Guan Bi of valve body opens efficiency, and structure is more safe and reliable.
2, the mechanical electric magnetic-type gas emergency cut-off valve of the present invention, during practical operation, actuator uses existing electromagnetism
Valve arrangement, when electromagnetic valve receives cut-out task, electromagnetic valve is opened, and, it is fixed to link up with around hook bottom its promotion hook forward
Position axle rotates and is separated with the projection on cam, rotates offer one downwards around cam rotating shaft after now cam departs from hook
Mechanical force, collaborative action of gravity, drivening rod, mandrel and the flap being attached thereto move downward, it is achieved quickly closing of valve
Close.During reset, then can reversely rotate cam either manually or by the valve opening power-assisted rod that the handwheel installed on cam rotating shaft matches,
Back-moving spring II drives hook to realize resetting.Open and reset that simple to operate driving voltage only needs 9V to drive rapidly, driving
Voltage is lower, it is ensured that the most all can start stop valve, use convenient safety.
3, the mechanical electric magnetic-type gas emergency cut-off valve of the present invention, is provided with horizontal gear shaft between hook and connecting rod, is used for
The position of limiting rod, is prevented effectively from reversion after cam departs from hook and is difficult to the generation of reset phenomenon.
4, the mechanical electric magnetic-type gas emergency cut-off valve of the present invention, offers annular groove in the middle part of flap and arranges by inducing QI
The flap connector that nut is installed, only needs the least strength can make both sides valve body internal gas pressure balance during return, return is convenient.
5, the mechanical electric magnetic-type gas emergency cut-off valve of the present invention, mandrel, flap and flap connector most preferably use copper
Material makes to provide more preferably action of gravity.
6, the mechanical electric magnetic-type gas emergency cut-off valve of the present invention, simple in construction, reasonable in design, the spool of purely mechanic structure
Being hardly damaged, service life is up to more than 15 years, and low cost of manufacture is particularly suitable for popularization and application.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram (opening) of the mechanical electric magnetic-type gas emergency cut-off valve of the present invention；
Fig. 2 is the sectional structure schematic diagram of mechanical electric magnetic-type another angle of gas emergency cut-off valve of the present invention；
Fig. 3 is the another angle sectional structure schematic diagram of the mechanical electric magnetic-type gas emergency cut-off valve of the present invention.
In figure, 1. quad seal pad, 2, casing cover, 3. cam, 4. hook, 5. back-moving spring II, 6. actuator, 7. outside
Shell, 8. nameplate, 9. connecting rod, 10. mandrel, 11.O RunddichtringO, 12. bonnet,s, 13. back-moving springs I, 14. flat films, 15. flaps
Adapter, 16. inducing QI nuts, 17. valve bodies, 18. bottom flanges, 19. cam rotating shafts, 20. valve opening power-assisted rods, 21. pins, 22. is convex
The fixing sleeve of wheel, 23. handwheels, 24. gear shafts, 25. hook locating shafts, the 26. fixing sleeves of hook, 27. steady pins, 28. flaps.
Detailed description of the invention
Seeing shown in Fig. 1-3, a kind of mechanical electric magnetic-type gas emergency cut-off valve, including valve body 17, bonnet, 12, lower valve
Lid 18, spool, the flap 28 being arranged in valve body 17 and back-moving spring I 13, and actuator 6.Bonnet, 12 and bottom flange
18 are seal-installed on valve body about 17 two ends.Installation fixed above one housing of the i.e. bonnet, 12 in the top of valve body 17, housing bag
Include shell 7 and casing cover 2, be sealed connected together by quad seal pad 1 between shell 7 and casing cover 2.Outside casing cover 2
Side also can arrange nameplate 8.
The topmost improvement of the present invention is the structure of spool, uses the cam mechanism of mechanical linkage, and spool includes convex
Wheel 3, hook 4, connecting rod 9 and mandrel 10, be arranged in housing.The middle part of cam 3 and the most rotating installation in middle and upper part of hook 4
On the shell 7 of housing, one end of cam 3 is provided with and links up with 4 projections matched, i.e. hook 4 can be hooked on this projection.Convex
The other end relative with this projection on wheel is hinged with the upper end of connecting rod 9.The upper end of hook 4 is fixedly mounted on housing by one
Back-moving spring II 5 be hooked on the projection of cam 3, lower end then start end with actuator 6 offsets.The bottom of mandrel 10 with
Flap 28 Joint, middle part is slidably sealingly mounted on bonnet, 12 on the installing port offered.The top of mandrel 10 is stretched into
Interior and with connecting rod 9 the lower end of housing is hinged via pin 21.
In order to ensure the rotating operation of cam 3, a square through hole can be offered at the middle part of cam 3, in through hole affixed one
Cam rotating shaft 19, cam rotating shaft 19 is provided with the square shaft of circular portion for two ends, and this circular portion is rotating to be arranged on
On shell 7.Also it is arranged with on cam rotating shaft 19 and fixes sleeve 22 for the cam fixing cam 3 axial location, this sleeve 22
There are two, are separately mounted to two ends before and after cam 3.Reply position for convenience, can fixedly mount in one end of cam rotating shaft 19
One handwheel 23.Simultaneously can also offer an article putting groove on shell 7, place in article putting groove one with handwheel 23 with the use of open
Valve power-assisted rod 20.
Equally, for realizing the rotation of hook 4 and fixing, a manhole can be offered, in through hole in the middle and upper part of hook 4
Installing a hook locating shaft 25, the two ends of this hook locating shaft 25 are fixedly mounted on shell 7, equally can be before and after hook 4
On the hook locating shaft 25 at two ends, sheathed hook fixes sleeve 26, to ensure that cam 3 and hook 4 rotate in the same plane.
In order to preferably coordinate, also a steady pin 27 matched with back-moving spring II 5 can be provided with on hook 4.
In order to limit angle when cam 3 and hook 4 rotation, it is to avoid excessively rotate and cause return difficulty, can hook 4 with
Being provided with a horizontal gear shaft 24 between connecting rod 9, horizontal gear shaft 24 two ends are fixedly mounted on shell 7.
During practical operation, actuator can use any one actuator of existing stop valve, most preferably uses electricity
Magnet valve structure.When electromagnetic valve receives cut-out task, electromagnetic valve is opened, and, hook 4 is fixed around hook bottom its promotion hook 4 forward
Position axle 25 rotates and is separated with the projection on cam 3, drives cam rotating shaft 19 jointly to revolve after now cam 3 departs from hook 4
Turning and provide a downward mechanical force, drivening rod 9, mandrel 10 move downward, and work in coordination with the action of gravity of flap 28 simultaneously, band
Dynamic flap 28 moves downward, it is achieved the quick-make of valve.During reset, then can manual rotation handwheel 23 or pass through cam rotating shaft
The valve opening power-assisted matched with handwheel 23 rod 20 installed on 19 reversely rotates cam 3, and back-moving spring II 5 drives hook 4 realization
Reset.Open and reset simple to operate rapidly, it is ensured that the most all can start stop valve, use convenient safety.
In order to make return more laborsaving, can be in the middle part perforate of flap 28 and at hole Zhou Kaishe mono-annular groove, by a class ten
Font flap connector 15 is sealingly mounted in annular groove, and the upper end of flap connector 15 is fixedly connected on bottom mandrel 10
Together, lower end is passed the hole in the middle part of flap 28 and is fixedly mounted on flap 28 by an inducing QI nut 16.For ensureing to seal, also
Flat film 14 can be installed in the bottom of flap 28.
Preferably, mandrel 10, flap 28 and flap connector 15 all use copper material to make.
Optionally, between described valve body 17 and upper and lower valve gap (12,18), the most logical between described mandrel 10 and bonnet, 12
Cross O RunddichtringO 11 to be tightly connected, to ensure the air-tightness of product, it is to avoid gas leakage.
The above, only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction.All
Those skilled in the art utilizes the variation of any equivalent that above-described embodiment made by technical scheme, modifies or drill
Become, all still fall within the range of technical solution of the present invention.
Claims (10)
1. a mechanical electric magnetic-type gas emergency cut-off valve, including valve body, valve gap, spool, the flap being arranged in valve body and multiple
Position spring I, and actuator, the bottom of spool is arranged in valve body, and the outside of valve body is led to and in actuator in top
Control lower drive flap to open and Guan Bi, it is characterised in that:
Described valve body top fixedly mounts a housing, and described spool uses cam mechanism, including mandrel, connecting rod, cam and hook,
The bottom of mandrel is connected with flap, and middle part is slidably sealingly mounted on valve body, the top of mandrel stretch in housing with even
The lower end of bar is hinged, the middle part of cam and the middle and upper part of hook is the most rotating is arranged on housing, one end of cam and company
The upper end of bar is hinged, and the other end is provided with and links up with the projection matched；The bottom of hook offsets with actuator, and upper end is passed through
The back-moving spring II that one is fixedly mounted on housing is hooked on the projection of cam.
Mechanical electric magnetic-type gas emergency cut-off valve the most according to claim 1, it is characterised in that:
The middle part of described cam offers a through hole, and an affixed cam rotating shaft in through hole, the two ends of described cam rotating shaft can
Rotate is arranged on housing, it is arranged with cam and fixes sleeve.
Mechanical electric magnetic-type gas emergency cut-off valve the most according to claim 2, it is characterised in that:
One end of described cam rotating shaft fixedly mounts a handwheel.
Mechanical electric magnetic-type gas emergency cut-off valve the most according to claim 3, it is characterised in that:
Offer an article putting groove on described housing, place in article putting groove one with handwheel with the use of valve opening power-assisted rod..
Mechanical electric magnetic-type gas emergency cut-off valve the most according to claim 1, it is characterised in that:
Described hook middle and upper part offers a through hole, installs a hook locating shaft, the two ends of described hook locating shaft in through hole
Being fixedly mounted on housing, it is arranged with the fixing sleeve of hook, hook can rotate around hook locating shaft.
Mechanical electric magnetic-type gas emergency cut-off valve the most according to claim 1, it is characterised in that:
Described hook is provided with a steady pin matched with back-moving spring II.
Mechanical electric magnetic-type gas emergency cut-off valve the most according to claim 1, it is characterised in that:
Being provided with a horizontal gear shaft between described hook and connecting rod, horizontal gear shaft two ends are fixedly mounted on housing.
Mechanical electric magnetic-type gas emergency cut-off valve the most according to claim 1, it is characterised in that:
Perforate offer annular groove in hole week in the middle part of described flap, a class cross flap connector is sealingly mounted at annular
In groove, being fixed together bottom the upper end of flap connector and mandrel, lower end passes the hole in the middle part of flap and by one
Inducing QI nut is fixedly mounted on flap.
Mechanical electric magnetic-type gas emergency cut-off valve the most according to claim 8, it is characterised in that:
Described flap and flap connector use copper material to make.
10. according to described mechanical electric magnetic-type gas emergency cut-off valve arbitrary in claim 1-9, it is characterised in that:
Between described valve body and valve gap, all it is tightly connected by sealing ring between described mandrel and valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610517472.3A CN106122575B (en) | 2016-07-04 | 2016-07-04 | Mechanical electromagnetic type gas emergency cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610517472.3A CN106122575B (en) | 2016-07-04 | 2016-07-04 | Mechanical electromagnetic type gas emergency cut-off valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106122575A true CN106122575A (en) | 2016-11-16 |
| CN106122575B CN106122575B (en) | 2021-03-19 |
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ID=57468307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610517472.3A Active CN106122575B (en) | 2016-07-04 | 2016-07-04 | Mechanical electromagnetic type gas emergency cut-off valve |
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| CN (1) | CN106122575B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559488A (en) * | 2017-10-17 | 2018-01-09 | 蓝衍（郑州)环保有限公司 | A kind of Intelligent Measurement control valve |
| CN108679237A (en) * | 2018-05-21 | 2018-10-19 | 河北秦汉电子科技有限公司 | A kind of emergency shutdown valve suitable for fuel gas pipeline |
| CN109027388A (en) * | 2018-09-30 | 2018-12-18 | 欧好光电控制技术（上海）股份有限公司 | The Electromalgnetic locking mechanism that locking heavy duty and low-power consumption reliably unlock |
| CN109027387A (en) * | 2018-09-30 | 2018-12-18 | 欧好光电控制技术（上海）股份有限公司 | A kind of semi-automatic solenoid valve locking heavy duty and low-power consumption reliably unlocks |
| CN112253821A (en) * | 2020-11-05 | 2021-01-22 | 中国矿业大学 | Fast-assembling combined liquid supply valve, use method and fast splicing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202065540U (en) * | 2011-01-28 | 2011-12-07 | 石家庄双九精铸阀业有限公司 | Emergency cutoff valve for liquefied gas tank truck |
| CN202418850U (en) * | 2011-07-06 | 2012-09-05 | 江南大学 | Cam rapid opening and closing valve |
| CN204358111U (en) * | 2014-11-19 | 2015-05-27 | 乐山恒力阀门有限责任公司 | A kind of gas emergency cut-off valve |
| CN105257888A (en) * | 2015-10-30 | 2016-01-20 | 重庆市界石燃气设备有限公司 | Emergency cutoff valve for fuel gas pipeline |
| US20160053914A1 (en) * | 2014-08-22 | 2016-02-25 | Emerson Process Management Regulator Technologies, Inc. | Electromagnetic Release for Valve |
| CN205806656U (en) * | 2016-07-04 | 2016-12-14 | 河北秦汉电子科技有限公司 | A kind of mechanical electric magnetic-type gas emergency cut-off valve |
-
2016
- 2016-07-04 CN CN201610517472.3A patent/CN106122575B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202065540U (en) * | 2011-01-28 | 2011-12-07 | 石家庄双九精铸阀业有限公司 | Emergency cutoff valve for liquefied gas tank truck |
| CN202418850U (en) * | 2011-07-06 | 2012-09-05 | 江南大学 | Cam rapid opening and closing valve |
| US20160053914A1 (en) * | 2014-08-22 | 2016-02-25 | Emerson Process Management Regulator Technologies, Inc. | Electromagnetic Release for Valve |
| CN204358111U (en) * | 2014-11-19 | 2015-05-27 | 乐山恒力阀门有限责任公司 | A kind of gas emergency cut-off valve |
| CN105257888A (en) * | 2015-10-30 | 2016-01-20 | 重庆市界石燃气设备有限公司 | Emergency cutoff valve for fuel gas pipeline |
| CN205806656U (en) * | 2016-07-04 | 2016-12-14 | 河北秦汉电子科技有限公司 | A kind of mechanical electric magnetic-type gas emergency cut-off valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559488A (en) * | 2017-10-17 | 2018-01-09 | 蓝衍（郑州)环保有限公司 | A kind of Intelligent Measurement control valve |
| CN107559488B (en) * | 2017-10-17 | 2024-03-12 | 蓝衍（郑州)环保有限公司 | Intelligent detection control valve |
| CN108679237A (en) * | 2018-05-21 | 2018-10-19 | 河北秦汉电子科技有限公司 | A kind of emergency shutdown valve suitable for fuel gas pipeline |
| CN109027388A (en) * | 2018-09-30 | 2018-12-18 | 欧好光电控制技术（上海）股份有限公司 | The Electromalgnetic locking mechanism that locking heavy duty and low-power consumption reliably unlock |
| CN109027387A (en) * | 2018-09-30 | 2018-12-18 | 欧好光电控制技术（上海）股份有限公司 | A kind of semi-automatic solenoid valve locking heavy duty and low-power consumption reliably unlocks |
| CN112253821A (en) * | 2020-11-05 | 2021-01-22 | 中国矿业大学 | Fast-assembling combined liquid supply valve, use method and fast splicing method |
| CN112253821B (en) * | 2020-11-05 | 2021-07-30 | 中国矿业大学 | Fast-assembling combined liquid supply valve, use method and fast splicing method |
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|---|---|
| CN106122575B (en) | 2021-03-19 |
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