CN106763813B - Electric stop valve with position indication - Google Patents
Electric stop valve with position indication Download PDFInfo
- Publication number
- CN106763813B CN106763813B CN201611251612.3A CN201611251612A CN106763813B CN 106763813 B CN106763813 B CN 106763813B CN 201611251612 A CN201611251612 A CN 201611251612A CN 106763813 B CN106763813 B CN 106763813B
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- Prior art keywords
- valve
- valve core
- position indicating
- shell
- screw rod
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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
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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
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
An electric stop valve with position indication comprises a valve body and a shell arranged at the upper end of the valve body, wherein a valve core assembly installation cavity is formed between the valve body and the shell; a valve seat is arranged in the valve body; the valve core assembly is a spring energy storage valve core assembly and comprises a valve core and a screw rod which are coaxially arranged; the lower end of the valve core is positioned on the valve seat, the upper part of the valve core is fixedly connected with the screw rod, a spring is arranged between the valve core and the screw rod, and the spring is positioned in the valve core; the electric stop valve also comprises a worm gear reducer arranged in the shell and a position indicating device arranged above the shell; a screw hole is axially formed in the middle of a worm wheel of the worm gear reducer, and the screw is matched with the internal thread of the worm wheel to form a spiral lifting mechanism; the position indicating device comprises a first trigger piece and a second trigger piece which are arranged on the screw rod, and an opening microswitch and a closing microswitch; the first trigger piece is used for triggering the micro switch to be turned on, and the second trigger piece is used for triggering the micro switch to be turned off. The invention can realize bidirectional sealing and has the function of position indication.
Description
Technical Field
The invention relates to an electric valve, in particular to an electric stop valve with a position indicator, which is used for controlling a gas pipeline of a space long-term on-orbit airship or a satellite.
Background
An environment-friendly life-saving system of a certain space station needs to be matched with an electric valve for controlling the on-off of a gas pipeline, and the design requirements of repeated actions, reliable bidirectional sealing, vacuum environment resistance, position indication function and self-locking at an opening or closing position without power consumption are provided.
The existing electric stop valve can only be sealed in one way, cannot meet the use requirement of the two-way seal provided by the system, and the electric stop valve does not have the position indication function.
Disclosure of Invention
The invention aims to solve the technical problem of providing an electric stop valve which can realize bidirectional sealing and has a position indication function so as to meet the on-off control requirement of a gas pipeline in a space station.
The technical solution of the invention is as follows:
an electric stop valve with position indication comprises a valve body and a shell arranged at the upper end of the valve body, wherein a valve core assembly installation cavity is formed between the valve body and the shell; a valve seat is arranged in the valve body; it is characterized in that:
the valve core assembly is a spring energy storage valve core assembly and comprises a valve core and a screw rod which are coaxially arranged; the lower end of the valve core is positioned on the valve seat, the upper part of the valve core is fixedly connected with the screw rod, a spring is arranged between the valve core and the screw rod, and the spring is positioned in the valve core;
the electric stop valve also comprises a worm gear reducer arranged in the shell and a position indicating device arranged above the shell;
the middle part of a worm wheel of the worm wheel and worm reducer is axially provided with a screw hole, and the screw is matched with the internal thread of the worm wheel to form a spiral lifting mechanism;
the position indicating device comprises a first trigger piece and a second trigger piece which are arranged on the screw rod, and an opening microswitch and a closing microswitch; the first trigger piece is used for triggering the micro switch to be turned on, and the second trigger piece is used for triggering the micro switch to be turned off.
When the screw rod moves upwards to open the valve core, the first trigger piece can trigger the on-microswitch, and when the screw rod moves downwards to close the valve core, the second trigger piece can trigger the off-microswitch.
When the valve needs to be opened, forward current is supplied to the motor, the motor drives the worm to rotate, the worm drives the worm wheel to rotate, and then the trapezoidal thread transmission mechanism formed by the worm wheel and the screw rod is utilized to convert the rotary motion of the worm wheel into the linear motion of the valve core, so that the valve is opened.
Based on the basic technical scheme, the invention also optimizes and/or defines the following steps:
the axes of the worm and the worm wheel are vertical, and the axes of the worm wheel and the screw rod are superposed.
The lower end surface of the valve core and the corresponding position of the upper end surface of the bottom of the valve body are provided with guide structures which are matched with each other along the axial direction of the valve core.
The guide structure comprises a guide rod arranged on the lower end face of the valve core and a guide groove arranged on the upper end face of the bottom of the valve body.
In order to reduce the friction force between the guide rod and the guide groove and prevent the phenomenon of clamping stagnation or deadlocking after the valve core acts for many times, a plastic antifriction ring is arranged on the guide rod.
A guide sleeve is arranged between the screw and the shell, and the guide sleeve is fixedly connected with the shell and is in clearance fit with the screw. The guide sleeve is matched with the guide structure, so that the motion guide of the valve core is a guide mode of the upper end and the lower end, the consistency of sealing indentations after the valve core acts for many times can be ensured, and the sealing reliability of the electric stop valve after the valve core acts for many times is ensured.
The guide sleeve and the shell are fixedly connected at the joint of the end faces by an anti-rotation pin.
In order to reduce the abrasion of the worm wheel during rotation, the worm wheel is sleeved with bearings which are respectively arranged on two sides of the worm wheel in the axial direction.
The upper part of the valve core is fixedly connected with the lower part of the screw rod through a connecting pin.
In order to enable the electric stop valve to have the capacity of resisting a space vacuum environment and be capable of being on orbit for a long time, a compound lubrication mode of diamond-like wear-resistant solid coating and vacuum grease lubrication is adopted on the worm gear reducer, the trapezoidal thread transmission mechanism and the bearing, on one hand, the friction resistance among metal parts is reduced, the movement flexibility is improved, and on the other hand, the vacuum cold welding phenomenon can be effectively prevented.
Compared with the prior art, the invention has the advantages that:
(1) Can realize bidirectional sealing, has position indication function, and has small mass and volume
Because this kind of structure is not adopted to current electric stop valve, when valve outlet pressure was higher than valve inlet pressure, the valve can not be sealed, this is because there is the clearance between each part of the screw drive mechanism that screw rod and worm wheel are constituteed, and when valve outlet pressure was higher than valve inlet pressure, the medium force of effect on the case can make the case move toward clearance department, leads to electric stop valve to leak. When the pressure of the valve outlet is higher than the pressure of the valve inlet, the valve core can move to the gap by overcoming larger spring force under the action of medium force, so that compared with the existing electric stop valve, the pressure of the valve outlet is higher than the pressure of the valve inlet within a certain range, and the bidirectional reliable sealing can be realized.
The position indicating device consists of the two micro switches, the micro switches are small in structure, the switch contacts in the micro switches can be switched quickly, the action is sensitive, the work is reliable, the micro switches can provide power-off signals of the motor on one hand, and can feed back the position state of the valve on the other hand, so that the position indicating function of the electric stop valve is realized.
The transmission structure of the invention adopts the worm and gear reducer, and the trapezoidal thread transmission structure converts the rotary motion of the motor into the linear motion of the valve core, and the worm and gear reducer and the thread transmission mechanism are labor-saving mechanisms, so that the efficiency is high, the required motor torque is small, and the mass and the volume of the motor are correspondingly small, and on the other hand, the worm and gear reducer can also ensure that the electric stop valve can be self-locked for a long time without consuming power after being opened or closed.
(2) Can be on orbit for a long time
The invention adopts the composite lubrication mode of the wear-resistant solid coating and the vacuum lubricating grease on the transmission parts such as the bearing, the worm gear reducer, the trapezoidal thread transmission mechanism and the like, thereby reducing the friction resistance among the metal parts, improving the motion flexibility and effectively preventing the vacuum cold welding phenomenon.
(3) High reliability
The valve core motion guide adopts a guide mode of the upper end and the lower end, the consistency of sealing indentation after the valve core acts for many times is ensured, the sealing reliability after the electric stop valve acts for many times is ensured, and a plastic antifriction ring is arranged on a guide rod at the lower end of the valve core to reduce the friction force between the valve core and a valve body, prevent the phenomenon of clamping stagnation or deadlocking after the valve core acts for many times and ensure the action reliability of the electric stop valve.
(4) Long service life
The existing electric stop valve which does not adopt a spring energy storage valve core structure has the defects that the valve core and the valve body are in hard contact at the moment of closing the valve, so that the hard contact between metal parts of a spiral transmission mechanism and a worm and gear speed reducer is caused, the contact surface is easily abraded, and the service life of the valve is shortened. According to the spring energy storage valve core structure adopted by the invention, because the screw rod is elastically connected with the valve core, when the valve is closed, the contact force between all metal parts is slowly increased along with the increase of the spring force, so that hard contact is effectively avoided, and the service life of the electric stop valve is prolonged.
Drawings
FIG. 1 is a schematic diagram of an electric stop valve with position indication;
FIG. 2 is a structural diagram of the connection of a worm gear reducer and a brushless motor;
FIG. 3 is a diagram of a spring accumulator cartridge;
FIG. 4 is a view showing the construction of a position indicating apparatus;
wherein the reference numbers are:
1-valve body, 2-valve core, 201-plastic antifriction ring, 3-spring, 4-guide sleeve, 5-anti-rotation pin, 6-first worm, 7-worm wheel, 8-switch bracket, 9-screw, 10-trigger piece, 11-second screw, 12-gasket, 13-bearing, 14-connecting pin, 15-shell, 16-first microswitch (closed), 17-second microswitch (open), 18-cover plate, 19, 20-O-shaped rubber ring and 21-brushless motor.
Detailed Description
As shown in fig. 1 to 4, the electric stop valve structure with position indication of the present invention mainly comprises a valve body 1, a valve core 2, a spring 3, a guide sleeve 4, an anti-rotation pin 5, a worm 6, a worm wheel 7, a switch bracket 8, a screw 9, a trigger piece 10, a screw 11, a gasket 12, a bearing 13, a connecting pin 14, a housing 15, a closing microswitch 16, an opening microswitch 17, a cover plate 18, O-shaped rubber rings (19, 20), and a brushless motor 21.
The valve core 2, the spring 3, the guide sleeve 4, the anti-rotation pin 5 and the screw rod 11 form a spring energy storage valve core assembly. Under the valve closing and opening state, spring 3 is compression state all the time, and the spring force is bigger, and two-way sealing effect is better, but the spring force that need overcome when the valve is closed just is bigger just simultaneously, therefore in reality should restrict the spring force in reasonable scope according to the design requirement. In the embodiment, the spring force is 300N-350N, so that bidirectional sealing can be ensured when the outlet pressure of the valve is 0-0.2MPa higher than the inlet pressure of the valve.
The brushless motor 21, the worm wheel 7 and the worm 6 constitute a worm gear reducer.
The switch bracket 8, the closing microswitch 16, the opening microswitch 17 and the trigger piece 10 constitute a position indicating device. The switch bracket 8 is arranged at the upper end of the shell 15, the bottom of the switch bracket 8 is provided with a through hole, and the upper end of the screw rod 11 extends out of the through hole; the trigger piece 10 is fixedly arranged at the upper end of the screw rod through a screw 9 and is provided with two trigger ends; the closing micro switch 16 and the opening micro switch 17 are arranged on the switch bracket 8 and distributed on two sides of the axis of the screw, and the closing micro switch 16 is positioned below the opening micro switch 17.
When the valve is required to be opened, forward current is supplied to the brushless motor 21, the brushless motor 21 drives the worm 6 to rotate, the worm 6 drives the worm wheel 7 to rotate, and the trapezoidal thread transmission mechanism formed by the worm wheel 7 and the screw rod 11 is utilized to convert the rotary motion of the worm wheel into the linear motion of the valve core 2, so that the valve is opened;
when the valve is fully opened, one triggering end of the triggering sheet 10 arranged on the screw rod 11 triggers the opening microswitch 17 to be closed, and simultaneously, a power-off signal is supplied to a motor power supply system, so that the motor is powered off. Because the speed reducer composed of the worm wheel 7 and the worm 6 has a self-locking function, the electric stop valve can be kept at an opening position without consuming electric energy, and the opening state of the valve is indicated by opening the microswitch 17.
Similarly, when the valve needs to be closed, reverse current is conducted to the brushless motor 21, the motor rotates reversely to drive the worm gear reducer to rotate reversely, the valve core 2 moves towards the closing direction, when the valve core 2 moves to the closing position, the other triggering end of the triggering sheet 10 installed on the screw rod 11 triggers the closing microswitch 16 to be closed, meanwhile, a power-off signal is sent to the motor power supply system, the motor is powered off, the valve core is reliably kept at the closing position through the self-locking function of the worm gear reducer, and the closing state of the valve is indicated through the closing microswitch 16.
Claims (10)
1. An electric stop valve with position indication comprises a valve body and a shell arranged at the upper end of the valve body, wherein a valve core assembly installation cavity is formed between the valve body and the shell; a valve seat is arranged in the valve body; the method is characterized in that:
the valve core assembly is a spring energy storage valve core assembly and comprises a valve core and a screw rod which are coaxially arranged; the lower end of the valve core is positioned on the valve seat, the upper part of the valve core is fixedly connected with the screw rod, a spring is arranged between the valve core and the screw rod, and the spring is positioned in the valve core;
the electric stop valve also comprises a worm gear reducer arranged in the shell and a position indicating device arranged above the shell;
the middle part of a worm wheel of the worm wheel and worm reducer is axially provided with a screw hole, and the screw is matched with the internal thread of the worm wheel to form a spiral lifting mechanism;
the position indicating device comprises a first trigger piece and a second trigger piece which are arranged on the screw rod, and a micro switch is turned on and turned off; the first trigger piece is used for triggering the micro switch to be turned on, and the second trigger piece is used for triggering the micro switch to be turned off.
2. The position indicating electric shut-off valve according to claim 1, characterized in that: the axes of the worm and the worm wheel are vertical, and the axes of the worm wheel and the screw coincide.
3. The position indicating electric shut valve according to claim 1 or 2, characterized in that: and guide structures which are matched with each other are arranged at corresponding positions of the lower end surface of the valve core and the upper end surface of the bottom of the valve body along the axial direction of the valve core.
4. The position indicating electrical shutoff valve of claim 3, wherein: the guide structure comprises a guide rod arranged on the lower end face of the valve core and a guide groove arranged on the upper end face of the bottom of the valve body.
5. The position indicating electric shut off valve according to claim 4, wherein: and the guide rod is provided with a plastic antifriction ring.
6. The position indicating electrical shutoff valve of claim 3, wherein: and a guide sleeve is arranged between the screw and the shell, and is fixedly connected with the shell and in clearance fit with the screw.
7. The position indicating electrically operated shutoff valve according to claim 6, wherein: the guide sleeve and the shell are fixedly connected at the joint of the end faces by an anti-rotation pin.
8. The position indicating electric shut-off valve according to claim 1, characterized in that: and a bearing is sleeved outside the worm wheel.
9. The position indicating electric shut off valve according to claim 1, wherein: the upper part of the valve core is fixedly connected with the lower part of the screw rod through a connecting pin.
10. The position indicating electric shut off valve according to claim 9, wherein: the worm gear reducer, the trapezoidal thread transmission mechanism and the bearing are lubricated by diamond-like wear-resistant solid coatings and vacuum lubricating grease.
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 CN106763813A (en) | 2017-05-31 |
| CN106763813B true CN106763813B (en) | 2023-03-21 |
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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 |
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| CN (1) | CN106763813B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| FR3097610B1 (en) * | 2019-06-20 | 2021-08-06 | Moving Magnet Tech | Compact control valve |
| CN112682567B (en) * | 2020-12-17 | 2022-10-18 | 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7097148B2 (en) * | 2004-07-21 | 2006-08-29 | Battelle Energy Alliance, Llc | Scissor thrust valve actuator |
| 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 杜美俊 ; 崔俊莲 ; .DZW型阀门电动装置.(第05期),全文. * |
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| CN106763813A (en) | 2017-05-31 |
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