CN106763813A - A kind of electric check valve with position instruction - Google Patents
A kind of electric check valve with position instruction Download PDFInfo
- Publication number
- CN106763813A CN106763813A CN201611251612.3A CN201611251612A CN106763813A CN 106763813 A CN106763813 A CN 106763813A CN 201611251612 A CN201611251612 A CN 201611251612A CN 106763813 A CN106763813 A CN 106763813A
- Authority
- CN
- China
- Prior art keywords
- valve
- electric check
- check valve
- valve element
- worm
- 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
- 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
- F16K1/02—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 screw-spindle
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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
- F16K1/32—Details
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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
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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
- F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
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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
- F16K35/00—Means to prevent accidental or unauthorised actuation
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
A kind of electric check valve with position instruction, including valve body and the housing installed in valve body upper end, form core assembly installation cavity between valve body and housing；Valve seat is provided with valve body；Core assembly is spring energy-storage core assembly, including the valve element and screw rod being coaxially disposed；Valve element lower end is located on valve seat, and top and the screw rod of valve element are connected, and spring is provided between valve element and screw rod, and spring is located in valve element；Electric check valve also includes the worm type of reduction gearing being arranged in housing and the position indicator being arranged on above housing；The worm gear middle part of worm type of reduction gearing offers screw vertically, and spiral shell worm and wheel screw-internal thread fit forms spiral lifting mechanism；Position indicator includes the first isolation being arranged on screw rod and the second isolation, opens microswitch and closes microswitch；First isolation is used to trigger opens microswitch, and the second isolation is used to trigger closes microswitch.The present invention can realize two way seal, with position indicating function.
Description
Technical field
It is long for space the present invention relates to a kind of electrically operated valve, and in particular to a kind of electric check valve with position instruction
The gas piping control of phase in-orbit airship or satellite.
Background technology
Certain space station ring control life support system needs a kind of supporting electrically operated valve for the control of gas piping break-make, it is proposed that
Can be repeated several times action, two way seal reliability, vacuum-resistant environment, with position indicating function, can not consume power supply power consumption from
It is locked in the design requirement for opening or closing position.
Existing electric check valve, some can only one-way sealing, it is impossible to which the use for meeting the two way seal of system proposition will
Ask, some electric check valves do not have position indicating function, the physical dimension and quality of some electric check valves are very big in addition, typically
Can not vacuum-resistant environment for a long time, be only used for ground system, it is impossible to meet the long-term in-orbit use requirement in space.
The content of the invention
The technical problem to be solved in the present invention be to provide it is a kind of can realize two way seal, electronic section with position indicating function
Only valve, controls to require with the break-make for meeting gas piping in space station.
Technical solution of the invention is：
A kind of electric check valve with position instruction, including valve body and the housing installed in valve body upper end, valve body and housing
Between formed core assembly installation cavity；Valve seat is provided with valve body；It is characterized in that：
The core assembly is spring energy-storage core assembly, including the valve element and screw rod being coaxially disposed；Valve element lower end is located at
On valve seat, top and the screw rod of valve element are connected, and spring is provided between valve element and screw rod, and spring is located in valve element；
The electric check valve also includes the worm type of reduction gearing being arranged in housing and the position being arranged on above housing
Put instruction device；
The worm gear middle part of the worm type of reduction gearing offers screw, spiral shell worm and wheel screw-internal thread fit, shape vertically
Into spiral lifting mechanism；
The position indicator includes the first isolation and the second isolation, opening microswitch on screw rod
With closing microswitch；First isolation is used to trigger opens microswitch, and the second isolation is used to trigger closes microswitch.
The first isolation when valve element is opened is moved on screw rod can trigger opening microswitch, and screw rod is displaced downwardly to valve element closing
When the second isolation can trigger closing microswitch.
When valve needs to open, forward current is led to motor, motor drives worm screw to rotate, worm drive worm gear wheel, then
The trapezoidal thread transmission mechanism constituted using worm gear and screw rod is the linear motion of valve element the convert rotational motion of worm gear, is realized
The unlatching of valve.
Based on above-mentioned basic technical scheme, the present invention also makes following optimization and/or limits：
The axis of above-mentioned worm and worm wheel is vertical, and the axis of the worm gear and screw rod overlaps.
The lower surface of above-mentioned valve element and the bottom upper surface corresponding position of valve body are axially provided with mutual cooperation along valve element
Guide frame.
Above-mentioned guide frame includes the guide post being arranged on valve element lower surface and is arranged on body base upper surface
Gathering sill.
To reduce the frictional force between guide post and gathering sill, prevent valve element from clamping stagnation or stuck existing occur after repeatedly acting
As being provided with elastic anti-friction ring on above-mentioned guide post.
Fairlead is provided between above-mentioned screw rod and housing, fairlead is connected with housing, coordinates with screw clearance.Fairlead
It is engaged with guide frame, valve core movement is directed to the guidance mode of upper and lower ends, ensure that valve element is close after repeatedly acting
Seal the uniformity of impression, it is ensured that the sealing reliability after the multiple action of electric check valve.
Above-mentioned fairlead is fixedly connected in end joints with housing using stop pin.
To reduce abrasion during worm gear wheel, bearing is set with outside above-mentioned worm gear, bearing is respectively in worm gear teeth axial direction
Both sides.
The top of above-mentioned valve element is connected with the bottom of screw rod by connecting pin.
In order that electric check valve has the ability of the environment of resistance to space vacuum can be in-orbit for a long time, above-mentioned worm and gear slows down
The compound of vacuum grease lubrication is added using the wear-resisting solid coating of DLC on device, trapezoidal thread transmission mechanism and bearing
Lubricating system, on the one hand reduces the frictional resistance between metal parts, improves kinematic dexterity, on the other hand can effectively prevent true
Air cooling weldering phenomenon occurs.
Present invention advantage compared with prior art is：
(1) two way seal can be realized, with position indicating function, quality and small volume
Existing electric check valve due to being provided without this structure, when valve export pressure be higher than valve inlet pressure when, valve
Door can not be sealed, and this is due to there is gap between each part of thread transmission that screw rod and worm gear are constituted, when valve export pressure
When power is higher than valve inlet pressure, acting on the medium power on valve element can cause that valve element is moved toward gap location, cause electronic cut-off
Valve is leaked.And the present invention when valve export pressure be higher than valve inlet pressure when, valve element must overcome in the presence of medium power compared with
Big spring force is only possible to toward gap location motion, therefore is higher than in valve export pressure than the existing electric check valve present invention
In valve inlet pressure certain limit, two-way reliable sealing can be realized.
, using two microswitch composition position indicators, microswitch structure is compact, and its internal switch is touched for the present invention
Point can be switched fast, and be active in one's movements, reliable operation, and on the one hand microswitch can provide the power-off signal of motor, on the other hand
The location status of valve can be fed back, the position indicating function of electric check valve is realized.
Employ worm type of reduction gearing on drive mechanism of the present invention, and by trapezoidal thread drive mechanism by the rotation of motor
The dynamic linear motion for being converted into valve element of transhipment, worm type of reduction gearing and thread transmission are effort-saving mechanism, efficiency high, this
The motor torque that sample is accomplished by is smaller, and the quality and volume of motor are corresponding also smaller, is on the other hand slowed down using worm and gear
Device is it is also ensured that electric check valve can not consume the long-term self-locking of power supply power consumption after opening or closing.
(2) can be in-orbit for a long time
The present invention employs wear-resisting on the driving parts such as bearing, worm type of reduction gearing and trapezoidal thread transmission mechanism
The composite lubricated mode of solid coating+vacuum grease, on the one hand reduces the frictional resistance between metal parts, improves motion flexible
Property, on the other hand can effectively prevent vacuum cold welding phenomenon from occurring.
(3) reliability is high
Valve core movement of the invention is oriented to by the way of upper and lower ends guiding, it is ensured that valve element seals impression after repeatedly acting
Uniformity, it is ensured that electric check valve sealing reliability repeatedly after action, and be mounted with the guide post of valve element lower end
Elastic anti-friction ring, to reduce the frictional force between valve element and valve body, prevents valve element from clamping stagnation or stuck phenomenon occur after repeatedly acting,
Ensure the Reliability of Microprocessor of electric check valve.
(4) long service life
The existing electric check valve for not using spring energy-storage valve core structure is valve closing moment, hard between valve element and valve body
Contact, so as to cause to be contacted firmly between screw-drive mechanism and each metal parts of worm type of reduction gearing, easily causes contact surface
Abrasion, shortens the life-span of valve.The spring energy-storage valve core structure that the present invention is used, because screw rod and valve element are elastic connections,
During valve closing, the contact force between each metal parts effectively prevent hard contact as the increase of spring force slowly increases,
Extend the service life of electric check valve.
Brief description of the drawings
Fig. 1 is the electric check valve structure principle chart with position instruction；
Fig. 2 is the structure chart that worm type of reduction gearing and brushless electric machine are connected；
Fig. 3 is spring energy-storage valve core structure figure；
Fig. 4 is position indicator structure chart；
Wherein reference is：
1- valve bodies, 2- valve elements, 201- elastic anti-frictions ring, 3- springs, 4- fairleads, 5- stop pins, the worm screws of 6- first, 7- snails
Wheel, 8- switch brackets, 9- screws, 10- isolations, the screw rods of 11- second, 12- pads, 13- bearings, 14- connecting pins, 15- housings,
The microswitches of 16- first (closing), the microswitches of 17- second (opening), 18- cover plates, 19,20-O shapes rubber ring, 21- is brushless electricity
Machine.
Specific embodiment
As shown in Figure 1 to 4, it is the electric check valve structure with position instruction of the invention, it is mainly by valve body 1, valve
Core 2, spring 3, fairlead 4, stop pin 5, worm screw 6, worm gear 7, switch bracket 8, screw 9, isolation 10, screw rod 11, pad 12,
Bearing 13, connecting pin 14, housing 15, close microswitch 16, open microswitch 17, cover plate 18, O-shaped rubber ring (19,20),
Brushless electric machine 21 is constituted.
Valve element 2, spring 3, fairlead 4, stop pin 5, screw rod 11 constitute spring energy-storage core assembly.Valve closing and opening
Under state, spring 3 is always compressive state, and spring force is bigger, and two way seal effect is better, but simultaneously valve closing when need gram
The spring force of clothes is bigger, therefore should should be limited in the reasonable scope spring force according to design requirement in practice.The present embodiment
Middle spring force 300N-350N, it is ensured that the two way seal when valve export pressure is more than valve inlet pressure 0-0.2Mpa.
Brushless electric machine 21, worm gear 7 and worm screw 6 composition worm type of reduction gearing.
Switch bracket 8, closing microswitch 16, opening microswitch 17 and isolation 10 constitute position indicator.
Switch bracket 8 is arranged on the upper end of housing 15, and the bottom of switch bracket 8 is provided with through hole, and the through hole is stretched out in the upper end of screw rod 11；Triggering
Piece 10 is fixedly mounted on screw rod upper end by screw 9, and it has two triggering ends；Close microswitch 16 and open microswitch
17 are arranged on switch bracket 8 and are distributed in the both sides of screw axis, close microswitch 16 and are located at and open microswitch 17
Lower section.
When needing valve to open, forward current is led to brushless electric machine 21, brushless electric machine 21 drives worm screw 6 to rotate, and worm screw 6 drives
Dynamic worm gear 7 is rotated, and the trapezoidal thread transmission mechanism for recycling worm gear 7 and the composition of screw rod 11 is valve the convert rotational motion of worm gear
The linear motion of core 2, realizes the unlatching of valve；
When valve wide open, a triggering end of the isolation 10 installed on screw rod 11 is touched opening microswitch 17 and is closed
Close, and give motor electric power system power-off signal simultaneously, motor power-off.Because the decelerator that worm gear 7 and worm screw 6 constitute has self-locking
Function, electric check valve can not consume electric energy and be maintained at open position, and indicate valve by opening microswitch 17
Open mode.
Similarly, it is necessary to during valve closing, reverse current be led to brushless electric machine 21, motor reversal drives worm and gear to slow down
Device is inverted, and valve element 2 is moved to direction is closed, and when valve element 2 moves to closed position, the isolation 10 of installation is another on screw rod 11
One triggering end is touched closing microswitch 16 and is closed, and gives motor electric power system power-off signal simultaneously, motor power-off, by snail
The auto-lock function of worm and gear decelerator, valve element is reliably maintained in its closed position, and indicates valve by closing microswitch 16
Closed mode.
Claims (10)
1. a kind of electric check valve with position instruction, including valve body and the housing installed in valve body upper end, valve body and housing it
Between formed core assembly installation cavity；Valve seat is provided with valve body；It is characterized in that：
The core assembly is spring energy-storage core assembly, including the valve element and screw rod being coaxially disposed；Valve element lower end is located at valve seat
On, top and the screw rod of valve element are connected, and spring is provided between valve element and screw rod, and spring is located in valve element；
The electric check valve also includes that the worm type of reduction gearing being arranged in housing and the position being arranged on above housing refer to
Showing device；
The worm gear middle part of the worm type of reduction gearing offers screw vertically, and spiral shell worm and wheel screw-internal thread fit forms spiral shell
Rotation elevating mechanism；
The position indicator includes the first isolation and the second isolation, opening microswitch and pass on screw rod
Close microswitch；First isolation is used to trigger opens microswitch, and the second isolation is used to trigger closes microswitch.
2. the electric check valve with position instruction according to claim 1, it is characterised in that：The axle of the worm and worm wheel
Line is vertical, and the axis of the worm gear and screw rod overlaps.
3. the electric check valve with position instruction according to claim 1 and 2, it is characterised in that：The lower end of the valve element
The bottom upper surface corresponding position of face and valve body is axially provided with the guide frame of mutual cooperation along valve element.
4. the electric check valve with position instruction according to claim 3, it is characterised in that：The guide frame includes setting
Put the guide post on valve element lower surface and the gathering sill being arranged on body base upper surface.
5. the electric check valve with position instruction according to claim 4, it is characterised in that：It is provided with the guide post
Elastic anti-friction ring.
6. the electric check valve with position instruction according to claim 3, it is characterised in that：Between the screw rod and housing
Fairlead is provided with, fairlead is connected with housing, coordinates with screw clearance.
7. the electric check valve with position instruction according to claim 6, it is characterised in that：The fairlead exists with housing
End joints are fixedly connected using stop pin.
8. the electric check valve with position instruction according to claim 1, it is characterised in that：Axle is set with outside the worm gear
Hold.
9. the electric check valve with position instruction according to claim 1, it is characterised in that：The top of the valve element and spiral shell
The bottom of bar is connected by connecting pin.
10. the electric check valve with position instruction according to claim 9, it is characterised in that：The worm and gear slows down
Vacuum grease is added to lubricate using the wear-resisting solid coating of DLC on device, trapezoidal thread transmission mechanism and bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251612.3A CN106763813B (en) | 2016-12-30 | 2016-12-30 | Electric stop valve with position indication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251612.3A CN106763813B (en) | 2016-12-30 | 2016-12-30 | Electric stop valve with position indication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106763813A true CN106763813A (en) | 2017-05-31 |
| CN106763813B CN106763813B (en) | 2023-03-21 |
Family
ID=58928452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611251612.3A Active CN106763813B (en) | 2016-12-30 | 2016-12-30 | Electric stop valve with position indication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106763813B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152559A (en) * | 2017-07-17 | 2017-09-12 | 常熟市虞菱机械有限责任公司 | A kind of many turning valve manual driving devices shown with valve location |
| WO2020254772A1 (en) * | 2019-06-20 | 2020-12-24 | Moving Magnet Technologies | Compact control valve |
| CN112524329A (en) * | 2020-12-31 | 2021-03-19 | 温州职业技术学院 | Novel valve driving device |
| CN112682567A (en) * | 2020-12-17 | 2021-04-20 | 浙江福瑞科流控机械有限公司 | Driving device capable of reducing valve operation torque |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060017032A1 (en) * | 2004-07-21 | 2006-01-26 | Dewall Kevin G | Scissor thrust valve actuator |
| WO2007090286A1 (en) * | 2006-02-09 | 2007-08-16 | Darren Rivet | Engine air intake shut off valve |
| CN201255258Y (en) * | 2008-07-24 | 2009-06-10 | 中国电子科技集团公司第三十八研究所 | Electric-controlled intelligent air vent valve with fail protection function |
| RU92930U1 (en) * | 2009-11-10 | 2010-04-10 | Открытое акционерное общество "АБС ЗЭиМ Автоматизация" (ОАО "АБС Автоматизация") | CONTROL DEVICE FOR PIPELINE CONTROL BODY |
| US20140096850A1 (en) * | 2011-12-15 | 2014-04-10 | Honeywell International Inc. | Visual indicator for a safety shut off valve |
-
2016
- 2016-12-30 CN CN201611251612.3A patent/CN106763813B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060017032A1 (en) * | 2004-07-21 | 2006-01-26 | Dewall Kevin G | Scissor thrust valve actuator |
| WO2007090286A1 (en) * | 2006-02-09 | 2007-08-16 | Darren Rivet | Engine air intake shut off valve |
| CN201255258Y (en) * | 2008-07-24 | 2009-06-10 | 中国电子科技集团公司第三十八研究所 | Electric-controlled intelligent air vent valve with fail protection function |
| RU92930U1 (en) * | 2009-11-10 | 2010-04-10 | Открытое акционерное общество "АБС ЗЭиМ Автоматизация" (ОАО "АБС Автоматизация") | CONTROL DEVICE FOR PIPELINE CONTROL BODY |
| US20140096850A1 (en) * | 2011-12-15 | 2014-04-10 | Honeywell International Inc. | Visual indicator for a safety shut off valve |
Non-Patent Citations (1)
| Title |
|---|
| 杜美俊;崔俊莲;: "DZW型阀门电动装置" * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152559A (en) * | 2017-07-17 | 2017-09-12 | 常熟市虞菱机械有限责任公司 | A kind of many turning valve manual driving devices shown with valve location |
| CN107152559B (en) * | 2017-07-17 | 2018-11-06 | 常熟市虞菱机械有限责任公司 | A kind of more turning valve manual driving devices shown with valve location |
| WO2020254772A1 (en) * | 2019-06-20 | 2020-12-24 | Moving Magnet Technologies | Compact control valve |
| FR3097610A1 (en) * | 2019-06-20 | 2020-12-25 | Moving Magnet Technologies | Compact control valve |
| CN112682567A (en) * | 2020-12-17 | 2021-04-20 | 浙江福瑞科流控机械有限公司 | Driving device capable of reducing valve operation torque |
| CN112524329A (en) * | 2020-12-31 | 2021-03-19 | 温州职业技术学院 | Novel valve driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106763813B (en) | 2023-03-21 |
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