CN109854766A - A kind of flow control valve that can be closed with moment - Google Patents
A kind of flow control valve that can be closed with moment Download PDFInfo
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- CN109854766A CN109854766A CN201811623664.8A CN201811623664A CN109854766A CN 109854766 A CN109854766 A CN 109854766A CN 201811623664 A CN201811623664 A CN 201811623664A CN 109854766 A CN109854766 A CN 109854766A
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Abstract
The invention discloses a kind of flow control valves that can be closed with moment, including valve body, the inner wall of the valve body is integrally formed with flashboard slot, the flashboard slot uses lower end hemisphere, upper end rectangular parallelepiped structure, and the inner wall gluing of the valve body has backing layer, and the upper end of the valve body connects bolt thread by level-one and is connected with valve deck, the tailing screw flight of the level-one connection bolt is connected with level-one coupling nut, the direct casting and forming of the total of the valve deck, upper end are big cylindrical body, and lower end is small cylinder.Advantage is: once emergency occurs, electromagnetism ring can be powered off immediately, the case where flashboard will be caught in flashboard slot under the elastic force of brute spring recovery and realize that moment closes, and the long a large amount of wastes for causing the energy such as water in pipeline, gas, oil or chemical toxic harmful material to gush with the energy etc. of pipeline valve shut-in time is effectively avoided to cause the serious pollution of environment again generations.
Description
Technical field
The present invention relates to flow control valve technical fields, more particularly to a kind of flow control valve that can be closed with moment.
Background technique
Flow control valve is to carry out the stream of control orifice by the size for changing throttling oral fluid resistance under certain pressure difference
Amount, to adjust the valve class of executive component (hydraulic cylinder or hydraulic motor) movement velocity.
Flow control valve in the prior art is usually using manual rotary switch mode.Explosion or explosion are met in pipeline
When, since the existing pipeline valve shut-in time is long, the energy such as water in pipeline, gas, oil or chemical toxic harmful material is caused to gush
And goes out, not only caused a large amount of wastes of energy etc. but also cause the serious pollution of environment.
Summary of the invention
The purpose of the present invention is to solve the problems in background techniques, and a kind of flow that can be closed with moment proposed
Control valve.
To achieve the goals above, present invention employs following technical solutions: a kind of flow control that can be closed with moment
Valve, including valve body, for the inner wall of the valve body integrally formed with flashboard slot, the flashboard slot is rectangular using lower end hemisphere, upper end
Body structure, the inner wall gluing of the valve body have backing layer, and the upper end of the valve body connects bolt thread by level-one and is connected with valve
The tailing screw flight of lid, the level-one connection bolt is connected with level-one coupling nut, and the total of the valve deck is directly cast as
Type, upper end are big cylindrical body, and lower end is small cylinder, and the upper part of the valve deck, which is symmetrically arranged with, is all made of identical rectangular structure
The outer wall of tandem-driving bogie and driving box, the tandem-driving bogie and driving box is fixedly connected to connecting plate, and the connecting plate passes through second level
Connection bolt is threadedly coupled with valve deck, and guillotine mechanism is equipped between the valve body and valve deck, is equipped with control mechanism in the valve deck,
Balance mechanism is equipped in the tandem-driving bogie.
In the above-mentioned flow control valve that can be closed with moment, the guillotine mechanism includes being used cooperatively with flashboard slot
Flashboard, the lower end of the flashboard are equipped with the seal convexity of multiple circumferentially isogonisms arrangement, and the inner bottom wall of the flashboard slot offers
The seal groove being used cooperatively with seal convexity, the seal convexity use arcuate structure, and the seal groove uses arc groove, described
The outer wall of flashboard is arranged with bellows, and the outer wall of the bellows is arranged with tetrafluoro casing, the bellows and tetrafluoro casing it
Between be filled with filler, the flashboard by bellows, filler and tetrafluoro casing and valve body interference fit.
In the above-mentioned flow control valve that can be closed with moment, the control mechanism includes being fixedly connected with flashboard upper end
Valve rod, the upper end of the valve rod is fixedly connected with slide plate, and the inner wall of the slide plate and valve deck is slidably connected, the slide plate it is upper
End is fixedly connected with ferromagnet, and the upper end of the slide plate, the inner wall of valve deck are fixedly connected with fixed plate, the fixed plate upper side wall
Movable mouth is offered, brute spring is fixedly connected with jointly between the fixed plate and slide plate, described in dead plate upper end
The inner wall of valve deck is fixedly connected with mounting plate, is equipped with ball nut in the valve deck, the ball nut by level-one bearing with
Mounting plate rotation connection, the ball nut extend to the lower end of mounting plate, slidably connect in the ball nut and match with it
Close the high-precision screw rod that uses, the upper end of the high-precision screw rod is fixedly connected with limit plate, the limit plate and valve deck it is interior
Wall is slidably connected, and successively interference fit connection has shading ring and electromagnetism ring under upper for the lower end outer wall of the high-precision screw rod,
Driving mechanism is equipped in the side of the ball nut, driving box.
In the above-mentioned flow control valve that can be closed with moment, the level-one bearing uses thrust ball bearing.
In the above-mentioned flow control valve that can be closed with moment, the internal diameter of the brute spring is greater than the interior of movable mouth
The internal diameter of diameter, the activity mouth is greater than the diameter of electromagnetism ring.
In the above-mentioned flow control valve that can be closed with moment, the driving mechanism includes being fixedly mounted in driving box
The driving end of the servo motor of bottom wall, the servo motor is connected with worm screw, the snail by successively shaft coupling, filter speed reducer
Bar is rotatablely connected by secondary bearing and valve deck, and the worm screw is engaged with worm gear, and the worm gear interference fit is connected in ball spiral shell
On mother.
In the above-mentioned flow control valve that can be closed with moment, the secondary bearing uses deep groove ball bearing.
In the above-mentioned flow control valve that can be closed with moment, the balance mechanism includes being fixedly connected in tandem-driving bogie
The clump weight of bottom wall.
In the above-mentioned flow control valve that can be closed with moment, the two sides side wall of the valve body is fixedly connected to connection
Flange, the connecting flange have flange gasket far from the side side wall gluing of valve body, and the connecting flange and flange gasket are all made of ring
Shape structure, the lateral wall of the connecting flange offer the connecting screw hole of circumferentially isogonism arrangement.
Compared with prior art, the advantages of flow control valve that originally can be closed with moment, is:
1, the interference fit and tetrafluoro casing, filler, bellows and valve between the seal convexity and seal groove of flashboard lower end
The interference fit of body upper end realizes the leakproofness under flashboard valve normally off, good airproof performance；
2, servo motor is transmitted torque to by shaft coupling and filter speed reducer, worm gear and the intermeshing effect of worm screw
Ball nut, ball nut convert the linear motion of high-precision screw rod for circular motion so that under electromagnetism ring by level-one bearing
Ferromagnet is dropped and contacted, is powered to electromagnetism ring, electromagnetism ring generates magnetic field and continually and steadily adsorbed to ferromagnet, servo motor
Repetitive operation rises ferromagnet, and ferromagnet drives flashboard to move up by valve rod, while slide plate is moved up and compressed strong
Power spring, and then flow control is carried out to valve body, using the excellent of servo motor, shaft coupling, filter speed reducer and high-precision screw rod
Point is high-precision control to be carried out to flashboard, and flexibility is high；
3, once emergency occurs, electromagnetism ring can be powered off immediately, the elastic force that flashboard will restore in brute spring
Under be caught in flashboard slot and realize that moment closes, effectively avoid the pipeline valve shut-in time it is long cause the energy such as water in pipeline, gas, oil or
The case where a large amount of wastes that chemical toxic harmful material is gushed with the energy etc. cause the serious pollution of environment again generation.
Detailed description of the invention
Fig. 1 is that one kind proposed by the present invention can be with the cross-sectional view for the flow control valve that moment closes；
Fig. 2 is the partial enlarged view in Fig. 1 of the present invention；
Fig. 3 is the enlarged drawing of part A in Fig. 1 of the present invention；
Fig. 4 is that one kind proposed by the present invention can be with the side view for the flow control valve body portion that moment closes；
Fig. 5 is that one kind proposed by the present invention can be with the front view for the flow control valve that moment closes.
In figure: 1 valve body, 2 backing layers, 3 connecting flanges, 4 flange gaskets, 5 connecting screw holes, 6 valve decks, 7 level-ones connect bolt, 8
Level-one coupling nut, 9 flashboards, 10 bellowss, 11 tetrafluoro casings, 12 fillers, 13 seal convexities, 14 slide plates, 15 ferromagnets, 16 are consolidated
Fixed board, 17 movable mouths, 18 brute springs, 19 tandem-driving bogies, 20 driving box, 21 connecting plates, 22 second levels connection bolt, 23 clump weights,
24 mounting plates, 25 ball nuts, 26 high-precision screw rods, 27 shading rings, 28 limit plates, 29 servo motors, 30 shaft couplings, 31 filtering
Retarder, 32 worm screws, 33 worm gears, 34 electromagnetism rings, 35 valve rods.
Specific embodiment
Following embodiment only exists in illustrative purpose, limits the scope of the invention without being intended to.
Referring to Fig.1-5, a kind of flow control valve that can be closed with moment, including valve body 1, the inner wall of valve body 1 are integrally formed
There is flashboard slot, flashboard slot uses lower end hemisphere, upper end rectangular parallelepiped structure, and the inner wall gluing of valve body 1 has backing layer 2, backing layer 2
1 inner wall of valve body can be protected, avoid in harsh environment using and cause corrosion the case where, prolong the service life, valve body 1
Upper end bolt 7 connected by level-one be threaded with valve deck 6, the tailing screw flight of level-one connection bolt 7 is connected with level-one connection
Nut 8, the direct casting and forming of the total of valve deck 6, upper end are big cylindrical body, and lower end is small cylinder, the upper part of valve deck 6
It is symmetrically arranged with the tandem-driving bogie 19 and driving box 20 for being all made of identical rectangular structure, tandem-driving bogie 19 and the outer wall of driving box 20 are fixed
It is connected with connecting plate 21, connecting plate 21 connects bolt 22 by second level and is threadedly coupled with valve deck 6, is equipped between valve body 1 and valve deck 6
Guillotine mechanism, valve deck 6 is interior to be equipped with control mechanism, is equipped with balance mechanism in tandem-driving bogie 19.
More specifically, guillotine mechanism includes the flashboard 9 being used cooperatively with flashboard slot, the lower end of flashboard 9 is equipped with multiple along circle
The seal convexity 13 of all isogonism arrangements, the inner bottom wall of flashboard slot offer the seal groove being used cooperatively with seal convexity 13, seal
Protrusion 13 uses arcuate structure, and seal groove uses arc groove, and the outer wall of flashboard 9 is arranged with bellows 10, the outer wall of bellows 10
It is arranged with tetrafluoro casing 11, filler 12 is filled between bellows 10 and tetrafluoro casing 11, flashboard 9 passes through bellows 10, filler
12 and tetrafluoro casing 11 and valve body 1 be interference fitted, the interference fit and four between the seal convexity 13 and seal groove of 9 lower end of flashboard
Fluorine casing 11, filler 12, bellows 10 and the interference fit of 1 upper end of valve body realize the leakproofness under 9 valve normally off of flashboard,
In addition illustrate, seal convexity 13 is made of plastic material.
More specifically, control mechanism includes the valve rod 35 being fixedly connected with 9 upper end of flashboard, the upper end of valve rod 35 is fixedly connected
There is slide plate 14, slide plate 14 and the inner wall of valve deck 6 are slidably connected, and the upper end of slide plate 14 is fixedly connected with ferromagnet 15, slide plate 14
Upper end, valve deck 6 inner wall be fixedly connected with fixed plate 16,16 upper side wall of fixed plate offers movable mouth 17, fixed plate 16 and sliding
Brute spring 18 is fixedly connected between plate 14 jointly, brute spring 18 is stronger compared with other common spring elasticity, stretches after restoring
Elastic force be enough that flashboard 9 is made to be caught in flashboard slot, the inner wall positioned at the valve deck 6 of 16 upper end of fixed plate is fixedly connected with mounting plate
24, valve deck 6 is interior to be equipped with ball nut 25, and ball nut 25 is rotatablely connected by level-one bearing and mounting plate 24, ball nut 25
The lower end of mounting plate 24 is extended to, high-precision screw rod 26 used in conjunction with is slidably connected in ball nut 25, high-precision
The upper end of screw rod 26 is fixedly connected with limit plate 28, and limit plate 28 and the inner wall of valve deck 6 are slidably connected, under high-precision screw rod 26
Successively interference fit connection has shading ring 27 and electromagnetism ring 34 to end outer wall under upper, and shading ring 27 effectively inhibits upward magnetic
, the magnetic field for avoiding electromagnetism ring 34 from generating impacts the normal work of servo motor 29, the side of ball nut 25, driving
Driving mechanism is equipped in case 20.
In addition illustrate, be pair using the advantages of servo motor 29, shaft coupling 30, filter speed reducer 31 and high-precision screw rod 26
Flashboard 9 carries out high-precision control, and flexibility is high.
It is highly preferred that level-one bearing uses thrust ball bearing, thrust ball bearing is mainly used in bearing the feelings of axial load
It is used under condition.
Further, the internal diameter of brute spring 18 is greater than the internal diameter of movable mouth 17, and the internal diameter of movable mouth 17 is greater than electromagnetism ring
The size of 34 diameter, movable mouth 17 will not cause to hinder to high-precision screw rod 26, electromagnetism ring 34.
More specifically, driving mechanism includes the servo motor 29 for being fixedly mounted on 20 inner bottom wall of driving box, servo motor 29
Driving end worm screw 32 is connected with by successively shaft coupling 30, filter speed reducer 31, worm screw 32 passes through secondary bearing and 6 turns of valve deck
Dynamic connection, worm screw 32 are engaged with worm gear 32, and the interference fit of worm gear 32 is connected on ball nut 25, and harmonic gear reducer has
In high precision, it the advantages that high-bearing capacity, is compared with common retarder, since the material used will lack 50%, volume and weight are extremely
1/3 is reduced less, and servo motor 29 will by shaft coupling 30 and filter speed reducer 31, worm gear 33 and the intermeshing effect of worm screw 32
For torque transfer to ball nut 25, ball nut 25 converts circular motion to by level-one bearing in the straight line of high-precision screw rod 26
Movement.
It is furthermore preferred that secondary bearing uses deep groove ball bearing, deep groove ball bearing identical other types of bearings phases with size
Than, such bearing friction coefficient is small, and limit speed is high, and structure is simple, and manufacturing cost is low, and precision is high, without being regularly maintained, and
Size range is big, form is more, is a most widely used class bearing.
More specifically, balance mechanism includes the clump weight 23 for being fixedly connected on 19 inner bottom wall of tandem-driving bogie, clump weight 23 is main
Play the role of balancing center of gravity, can avoid the possibility that entire valve gravity center instability causes skew to be broken.
Further, the two sides side wall of valve body 1 is fixedly connected to connecting flange 3, connecting flange 3 far from valve body 1 one
Side side wall gluing has flange gasket 4, and connecting flange 3 and flange gasket 4 are all made of ring structure, and the lateral wall of connecting flange 3 offers
Circumferentially the connecting screw hole 5 of isogonism arrangement, valve body 1 pass through the threaded connection of 5 bolt of screw hole, method with the connecting flange 3 on pipeline
The sealed connection of valve body 1 and pipeline is realized in plasticity cooperation between blue pad 4.
It further illustrates, other accessories such as valve body 1, valve deck 6, tandem-driving bogie 19 and driving box 20 are all made of nonferromagnetic material
Material is made, and nonferromugnetic material can avoid impacting electromagnetism ring 34 and the cooperation of ferromagnet 15.
It further illustrates, is above fixedly connected unless specifically defined or limited otherwise, otherwise it shall be understood in a broad sense, for example,
It can be welding, be also possible to gluing, or be integrally formed the customary means well known to those skilled in the art such as setting.
In the present invention, the connecting flange 3 on valve body 1 and pipeline passes through between the threaded connection of 5 bolt of screw hole, flange gasket 4
Plasticity cooperation realize valve body 1 and pipeline sealed connection；
Interference fit and tetrafluoro casing 11, filler 12, bellows between the seal convexity 13 and seal groove of 9 lower end of flashboard
10 with 1 upper end of valve body interference fit realize 9 valve normally off of flashboard under leakproofness, in addition illustrate, seal convexity 13 is adopted
It is made of plastic material；
Specific valve flow control is as follows: by electric with the matching used servo-driver real-time control servo of servo motor 29
Machine 29, servo motor 29 pass through shaft coupling 30 and filter speed reducer 31, worm gear 33 and the intermeshing effect of worm screw 32 for torque
Ball nut 25 is passed to, ball nut 25 converts circular motion to by level-one bearing the linear motion of high-precision screw rod 26
So that electromagnetism ring 34 declines and contacts ferromagnet 15, be powered to electromagnetism ring 34, electromagnetism ring 34 generate magnetic field and to ferromagnet 15 into
The continual and steady absorption of row, 29 repetitive operation of servo motor rise ferromagnet 15, ferromagnet 15 by valve rod 35 drive flashboard 9 to
Upper movement, while slide plate 14 moves up and compresses brute spring 18, and then carries out flow control to valve body 1；
Once emergency occurs, electromagnetism ring 34 can be powered off immediately, the elasticity that flashboard 9 will restore in brute spring 18
It is caught in flashboard slot under power and realizes that moment closes.
Although be used more herein valve body 1, backing layer 2, connecting flange 3, flange gasket 4, connecting screw hole 5, valve deck 6,
Level-one connects bolt 7, level-one coupling nut 8, flashboard 9, bellows 10, tetrafluoro casing 11, filler 12, seal convexity 13, slide plate
14, ferromagnet 15, fixed plate 16, movable mouth 17, brute spring 18, tandem-driving bogie 19, driving box 20, connecting plate 21, second level connection
Bolt 22, clump weight 23, mounting plate 24, ball nut 25, high-precision screw rod 26, shading ring 27, limit plate 28, servo motor
29, the terms such as shaft coupling 30, filter speed reducer 31, worm screw 32, worm gear 33, electromagnetism ring 34, valve rod 35, but be not precluded and use it
A possibility that its term.The use of these items is only for be more convenient to describe and explain essence of the invention；They are solved
Being interpreted into any additional limitation is disagreed with spirit of that invention.
Claims (9)
1. the flow control valve that one kind can be closed with moment, including valve body (1), which is characterized in that the inner wall one of the valve body (1)
Body formed to have flashboard slot, the flashboard slot uses lower end hemisphere, upper end rectangular parallelepiped structure, and the inner wall of the valve body (1) is glued
Have backing layer (2), the upper end of the valve body (1) is threaded with valve deck (6) by level-one connection bolt (7), a cascade
The tailing screw flight of connecting bolt (7) is connected with level-one coupling nut (8), the direct casting and forming of total of the valve deck (6), on
End is big cylindrical body, and lower end is small cylinder, and the upper part of the valve deck (6), which is symmetrically arranged with, is all made of the flat of identical rectangular structure
It weighing case (19) and driving box (20), the outer wall of the tandem-driving bogie (19) and driving box (20) is fixedly connected to connecting plate (21),
The connecting plate (21) is threadedly coupled by second level connection bolt (22) with valve deck (6), between the valve body (1) and valve deck (6)
Equipped with guillotine mechanism, it is equipped with control mechanism in the valve deck (6), is equipped with balance mechanism in the tandem-driving bogie (19).
2. the flow control valve that one kind according to claim 1 can be closed with moment, which is characterized in that the guillotine mechanism
Including the flashboard (9) being used cooperatively with flashboard slot, the sealing that the lower end of the flashboard (9) is equipped with the arrangement of multiple circumferentially isogonisms is convex
It rises (13), the inner bottom wall of the flashboard slot offers the seal groove being used cooperatively with seal convexity (13), the seal convexity
(13) arcuate structure is used, the seal groove uses arc groove, and the outer wall of the flashboard (9) is arranged with bellows (10), described
The outer wall of bellows (10) is arranged with tetrafluoro casing (11), and filler is filled between the bellows (10) and tetrafluoro casing (11)
(12), the flashboard (9) is interference fitted by bellows (10), filler (12) and tetrafluoro casing (11) and valve body (1).
3. the flow control valve that one kind according to claim 1 can be closed with moment, which is characterized in that the control mechanism
Including the valve rod (35) being fixedly connected with flashboard (9) upper end, the upper end of the valve rod (35) is fixedly connected with slide plate (14), described
Slide plate (14) and the inner wall of valve deck (6) are slidably connected, and the upper end of the slide plate (14) is fixedly connected with ferromagnet (15), the cunning
The upper end of plate (14), the inner wall of valve deck (6) are fixedly connected with fixed plate (16), and fixed plate (16) upper side wall offers activity
Mouth (17), is fixedly connected with brute spring (18) between the fixed plate (16) and slide plate (14) jointly, is located at fixed plate (16)
The inner wall of the valve deck (6) of upper end is fixedly connected with mounting plate (24), is equipped with ball nut (25) in the valve deck (6), institute
It states ball nut (25) to be rotatablely connected by level-one bearing and mounting plate (24), the ball nut (25) extends to mounting plate
(24) lower end, the ball nut (25) is interior to slidably connect high-precision screw rod (26) used in conjunction with, described high-precision
The upper end of degree screw rod (26) is fixedly connected with limit plate (28), and the limit plate (28) and the inner wall of valve deck (6) are slidably connected, institute
Stating the lower end outer wall of high-precision screw rod (26), successively interference fit connection has shading ring (27) and electromagnetism ring (34), institute under upper
Side, the driving box (20) for stating ball nut (25) are interior equipped with driving mechanism.
4. the flow control valve that one kind according to claim 3 can be closed with moment, which is characterized in that the level-one bearing
Using thrust ball bearing.
5. the flow control valve that one kind according to claim 3 can be closed with moment, which is characterized in that the brute spring
(18) internal diameter is greater than the internal diameter of movable mouth (17), and the internal diameter of the activity mouth (17) is greater than the diameter of electromagnetism ring (34).
6. the flow control valve that one kind according to claim 3 can be closed with moment, which is characterized in that the driving mechanism
Servo motor (29) including being fixedly mounted on driving box (20) inner bottom wall, the driving end of the servo motor (29) is by successively
Shaft coupling (30), filter speed reducer (31) are connected with worm screw (32), and the worm screw (32) is rotated by secondary bearing and valve deck (6)
Connection, the worm screw (32) are engaged with worm gear (32), and worm gear (32) interference fit is connected on ball nut (25).
7. the flow control valve that one kind according to claim 6 can be closed with moment, which is characterized in that the secondary bearing
Using deep groove ball bearing.
8. the flow control valve that one kind according to claim 1 can be closed with moment, which is characterized in that the balance mechanism
Clump weight (23) including being fixedly connected on tandem-driving bogie (19) inner bottom wall.
9. the flow control valve that one kind according to claim 1 can be closed with moment, which is characterized in that the valve body (1)
Two sides side wall be fixedly connected to connecting flange (3), the connecting flange (3) has far from the side side wall gluing of valve body (1)
Flange gasket (4), the connecting flange (3) and flange gasket (4) are all made of ring structure, and the lateral wall of the connecting flange (3) is opened
Connecting screw hole (5) equipped with the arrangement of circumferentially isogonism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811623664.8A CN109854766B (en) | 2018-12-28 | 2018-12-28 | Flow control valve capable of being closed instantly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811623664.8A CN109854766B (en) | 2018-12-28 | 2018-12-28 | Flow control valve capable of being closed instantly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854766A true CN109854766A (en) | 2019-06-07 |
| CN109854766B CN109854766B (en) | 2020-04-14 |
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ID=66892943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811623664.8A Active CN109854766B (en) | 2018-12-28 | 2018-12-28 | Flow control valve capable of being closed instantly |
Country Status (1)
| Country | Link |
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| CN (1) | CN109854766B (en) |
Cited By (4)
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| CN110906022A (en) * | 2019-12-06 | 2020-03-24 | 浙江宣达环境科技股份有限公司 | U-shaped gate valve |
| CN111022686A (en) * | 2019-12-11 | 2020-04-17 | 铜陵天海流体控制股份有限公司 | Wedge gate valve |
| CN113324084A (en) * | 2021-03-12 | 2021-08-31 | 温州凯格赛扬智能科技有限公司 | Dual-purpose control valve convenient to operate |
| CN113324085A (en) * | 2021-03-12 | 2021-08-31 | 温州凯格赛扬智能科技有限公司 | Operation method of manual and electric dual-purpose valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113324084A (en) * | 2021-03-12 | 2021-08-31 | 温州凯格赛扬智能科技有限公司 | Dual-purpose control valve convenient to operate |
| CN113324085A (en) * | 2021-03-12 | 2021-08-31 | 温州凯格赛扬智能科技有限公司 | Operation method of manual and electric dual-purpose valve |
| CN113324084B (en) * | 2021-03-12 | 2022-07-12 | 温州凯格赛扬智能科技有限公司 | Dual-purpose control valve convenient to operate |
| CN113324085B (en) * | 2021-03-12 | 2022-07-15 | 温州凯格赛扬智能科技有限公司 | Operation method of manual and electric dual-purpose valve |
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| CN109854766B (en) | 2020-04-14 |
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