CN100351560C - Mini-consumption electric controlling valve - Google Patents

Mini-consumption electric controlling valve Download PDF

Info

Publication number
CN100351560C
CN100351560C CNB2004100263874A CN200410026387A CN100351560C CN 100351560 C CN100351560 C CN 100351560C CN B2004100263874 A CNB2004100263874 A CN B2004100263874A CN 200410026387 A CN200410026387 A CN 200410026387A CN 100351560 C CN100351560 C CN 100351560C
Authority
CN
China
Prior art keywords
valve plate
liquid
shaped
end surface
fixed
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.)
Expired - Fee Related
Application number
CNB2004100263874A
Other languages
Chinese (zh)
Other versions
CN1598372A (en
Inventor
杨晖
张建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CNB2004100263874A priority Critical patent/CN100351560C/en
Publication of CN1598372A publication Critical patent/CN1598372A/en
Application granted granted Critical
Publication of CN100351560C publication Critical patent/CN100351560C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Electrically Driven Valve-Operating Means (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

The present invention provides an electric control valve with micro power consumption. An actuating shaft (8) is installed at the center of an upper bracket (7), a movable valve sheet (10) is installed at the upper part of a lower bracket (9) by a valve sheet positioning ring (14), a fixed valve sheet (11) is fixed to the lower part of the lower bracket, the upper end surface of the movable valve sheet (10) is connected with the lower end of the actuating shaft (8), and the movable valve sheet (10) and the fixed valve sheet (11) are movably positioned by a central shaft (15) of the valve sheets. The movable valve sheet (10) is provided with an air and liquid ventilating hole (16), a groove (17) and a groove (18) are arranged on a position of the lower end surface of the movable valve sheet (10), and the position of the lower end surface is not provided with holes. The groove (18) is communicated with the air and liquid ventilating hole (16). The fixed valve sheet (11) is provided with an air and liquid ventilating hole (19), an annular air and liquid ventilating groove (20) is arranged on a position of the upper end surface of the fixed valve sheet (11), and the position of the upper end surface is not provided with holes. The annular air and liquid ventilating groove (20) is communicated with the groove (18) on the lower end surface of the movable valve sheet (10). The applied force during the processes of opening and closing the electric control valve has no direct relation with the pressure of the air and liquid in the pipe, so the present invention can satisfy the design requirements with micro power consumption and large flow. With the test, as compared with the electrical-controlled valve which is the same type and is driven by a miniature motor, the present invention can save energy by more than 80 %.

Description

Little power consumption electric control valve
Technical field
The present invention relates to a kind of little power consumption electric control valve.
Background technique
Present relationships of increase function with the pressure of gas, liquid in switching process institute's externally applied forces of the valve ubiquity valve of plane ceramic seal and the pipeline in the prior art, the pressure that is to say gas, liquid in the pipeline is big more, it is also just big more to open and close the power that valve consumed, and accounts for 95% of whole power consumption basically.Common solution is the lifting surface area that reduces valve block, but the pressure loss of valve is increased, and influences the gas-liquid flow.
Summary of the invention
The technical problem that the present invention solves: design a kind of little power consumption electric control valve, adopt force balance principle and Pascal's law, the frictional force that makes its switching process externally applied forces only need overcome seal ring and valve gets final product, there is not direct relation with the pressure of gas, liquid in the pipeline, simple in structure, the reliability height makes such valve adopt the gear driven mechanism of small-power, low voltage (2.7VDC-3.6VDC) and little reduction speed ratio (500: 1) to become possibility, can satisfy the designing requirement of the big flow of little power consumption.
Technical solution of the present invention: a kind of little power consumption electric control valve, comprise micro motor 1, valve body 2, reduction gears mechanism 3, photoelectric sensing apparatus 4 and positioning device 5, micro motor 1 and reduction gears mechanism 3 are arranged on the top of valve body 2, the power input shaft of reduction gears mechanism 3 links to each other with the main shaft of micro motor 1, the live axle 8 of reduction gears mechanism 3 is provided with positioning device 5, the below correspondence of positioning device 5 is provided with photoelectric sensing apparatus 4, spool 6 is fixed in the valve body 2 by spool retaining ring 23 and is positioned at the below of reduction gears mechanism 3, air inlet on the spool 6, liquid mouth 12 is given vent to anger, liquid mouth 13 respectively with the air inlet of valve body 2, liquid mouth and giving vent to anger, liquid mouth correspondence; Spool 6 is made of upper bracket 7, lower support frame 9, moving valve plate 10 and fixed valve plate 11, and the central authorities of upper bracket 7 are equipped with live axle 8, and the side is shaped on air inlet, liquid mouth 12, and the below is provided with lower support frame 9; The top of lower support frame 9 is equipped with moving valve plate 10 by valve block positioning ring 14, and valve block positioning ring 14 is by " O " RunddichtringO and lower support frame 9 sealings, moving valve plate 10 is by " O " RunddichtringO and 14 sealings of valve block positioning ring, the bottom is fixed with fixed valve plate 11, the upper-end surface of moving valve plate 10 is connected with the underpart of live axle 8, and passes through valve block central shaft 15 activity orientation between moving valve plate 10 and the fixed valve plate 11; Be shaped on first ventilation, liquid hole 16 on the moving valve plate 10, on the lower end surface not tapping be shaped on groove 17 and ventilation, liquid groove 18, and ventilation, liquid groove 18 are ventilated with first, liquid hole 16 communicates; Be shaped on second ventilation, liquid hole 19 on the fixed valve plate 11, on the upper-end surface not tapping be shaped on ring-shaped ventilation, liquid groove 20, and ring-shaped ventilation, liquid groove 20 communicate with ventilation, liquid groove 18 on moving valve plate 10 lower end surfaces.
The area of ring-shaped ventilation, liquid groove 20 equates substantially with the area on moving valve plate 10 tops.Moving valve plate 10 upper-end surfaces are the tapping Bevel not.
Photoelectric sensing apparatus 4 and positioning device 5 are positioned at valve body 2, photoelectric sensing apparatus 4 is made of two grooved photoelectric sensors 21 and photoelectric sensor circuit board 22, and grooved photoelectric sensor 21 and photoelectric sensor circuit board 22 are fixed on the upper-end surface of spool retaining ring 23; Positioning device 5 is made of positioning rod 24 and locating stop piece 25, and positioning rod 24 is fixed on the live axle 8, and locating stop piece 25 is fixed on the positioning rod 24, and grooved photoelectric sensor 21 be positioned at locating stop piece 25 under.
Symmetry is shaped on two fan-shaped described first ventilation, liquid holes 16 on the moving valve plate 10, symmetrical two inclined- planes 34,35 are made in upper-end surface not tapping, on the lower end surface not the tapping symmetry be shaped on two fan-shaped described grooves 17 and two described ventilations, liquid groove 18, and two described ventilations, liquid grooves 18 communicate with two fan-shaped described first ventilation, liquid holes 16 respectively; Symmetry is shaped on two fan-shaped described second ventilation, liquid holes 19 on the fixed valve plate 11; Ring-shaped ventilation, liquid groove 20 communicate with two ventilations, liquid grooves 18 on moving valve plate 10 lower end surfaces.
Moving valve plate 10 and fixed valve plate 11 are made by pottery, and ceramic minute surface technology sealing is adopted in the sealing of the two junction plane.
Symmetry is shaped on two cylindrical groove 29,30 on the upper-end surface of moving valve plate 10, and the central authorities of connecting rod 31 are fixed on the lower end of live axle 8, and the two ends vertical fixing of connecting rod 31 has locating column 32,33, and locating column 32,33 lays respectively in the cylindrical groove 29,30.
Be shaped on second groove 26 on the valve block positioning ring 14, built-in spring 27, the lower end of spring 27 is fixed with steel ball 28, and steel ball 28 withstands on the moving valve plate 10, and moving valve plate 10 is carried out axial limiting.
Compared with prior art it opens and closes the frictional force that process externally applied forces only need overcome seal ring and valve and gets final product in the present invention, there is not direct relation with the pressure of gas, liquid in the pipeline, simple in structure, the reliability height, make such valve adopt the gear driven mechanism of small-power, low voltage (2.7VDC-3.6VDC) and little reduction speed ratio (500: 1) to become possibility, can satisfy the designing requirement of the big flow of little power consumption.More energy-conservation more than 80% than the electrically-controlled valve of micro motor driving of the same type after tested.In addition and since the moving valve plate upper-end surface not tapping make two inclined-planes of symmetry, not only have guide functions, but also can reduce " water hammer " impact force, reduce gas, liquid flow-disturbing, the precision of stable supporting with it metrical instrument to valve block.
Description of drawings
Fig. 1 is the structural representation of spool of the present invention,
Fig. 2 is the structural representation of moving valve plate of the present invention,
Fig. 3 is the A-A sectional view of Fig. 1, and Fig. 4 is the B-B sectional view of Fig. 1,
Fig. 5 is the worm's eye view of Fig. 1,
Fig. 6 is the structural representation of fixed valve plate of the present invention,
Fig. 7 is the C-C sectional view of Fig. 6,
Fig. 8 is the coupled condition schematic representation of live axle of the present invention and moving valve plate,
Fig. 9 is the structural representation of an embodiment of the present invention.
Embodiment
1,2,3,4,5,6,7,8,9 a kind of embodiment of the present invention is described in conjunction with the accompanying drawings.
A kind of little power consumption electric control valve, comprise micro motor 1, valve body 2, reduction gears mechanism 3, photoelectric sensing apparatus 4 and positioning device 5, micro motor 1 and reduction gears mechanism 3 are arranged on the top of valve body 2, the power input shaft of reduction gears mechanism 3 links to each other with the main shaft of micro motor 1, the live axle 8 of reduction gears mechanism 3 is provided with positioning device 5, and the below correspondence of positioning device 5 is provided with photoelectric sensing apparatus 4.Photoelectric sensing apparatus 4 and positioning device 5 are positioned at valve body 2, photoelectric sensing apparatus 4 is made of two grooved photoelectric sensors 21 and photoelectric sensor circuit board 22, and grooved photoelectric sensor 21 and photoelectric sensor circuit board 22 are fixed on the upper-end surface of spool retaining ring 23; Positioning device 5 is made of positioning rod 24 and locating stop piece 25, and positioning rod 24 is fixed on the live axle 8, and locating stop piece 25 is fixed on the positioning rod 24, and grooved photoelectric sensor 21 be positioned at locating stop piece 25 under.
Spool 6 is fixed in the valve body 2 by spool retaining ring 23 and is positioned at the below of reduction gears mechanism 3, and the liquid entering hole 12 on it, liquid outlet 13 liquid entering hole and the liquid outlet with valve body 2 respectively are corresponding; Spool 6 is made of upper bracket 7, lower support frame 9, moving valve plate 10 and fixed valve plate 11, and the central authorities of upper bracket 7 are equipped with live axle 8, and the side is shaped on liquid entering hole 12, and the below is provided with lower support frame 9; The top of lower support frame 9 is equipped with moving valve plate 10 by valve block positioning ring 14, and valve block positioning ring 14 passes through " O " RunddichtringO and lower support frame 9 seals, and moving valve plate 10 is by " O " RunddichtringO and 14 sealings of valve block positioning ring, and the bottom is fixed with fixed valve plate 11.Symmetry is shaped on two cylindrical groove 29,30 on the upper-end surface of moving valve plate 10, and the central authorities of connecting rod 31 are fixed on the lower end of live axle 8, and the two ends vertical fixing of connecting rod 31 has locating column 32,33, and locating column 32,33 lays respectively in the cylindrical groove 29,30.Pass through valve block central shaft 15 activity orientation between moving valve plate 10 and the fixed valve plate 11; Symmetry is shaped on two fan-shaped liquid-through holes 16 on the moving valve plate 10, symmetrical two inclined- planes 34,35 are made in upper-end surface not tapping, on the lower end surface not the tapping symmetry be shaped on two scalloped recess 17 and two logical liquid grooves 18, and two logical liquid grooves 18 communicate with two fan-shaped liquid-through holes 16 respectively; Symmetry is shaped on two fan-shaped liquid-through holes 19 on the fixed valve plate 11, on the upper-end surface not tapping be shaped on the logical liquid groove 20 of annular, and the logical liquid groove 20 of annular communicates with two logical liquid grooves 18 on moving valve plate 10 lower end surfaces.The area of the logical liquid groove 20 of this outer ring must equate substantially with the area on moving valve plate 10 tops.
Moving valve plate 10 and fixed valve plate 11 are made by pottery, and ceramic minute surface technology sealing is adopted in the sealing of the two junction plane.Be shaped on groove 26 on the valve block positioning ring 14, built-in spring 27, the lower end of spring 27 is fixed with steel ball 28, and steel ball 28 withstands on the moving valve plate 10, and moving valve plate 10 is carried out axial limiting.
Working principle: after being connected the present invention on the pipeline, this moment, valve was in closed condition, be full of liquid in the spool 6, liquid flows in the logical liquid groove 20 of annular on fixed valve plates 11 upper-end surfaces by two fan-shaped liquid-through holes 16 on the moving valve plate 10 and two logical liquid grooves 18 on the lower end surface, and the fluid pressures in the logical liquid groove 20 of annular have just produced a back-pressure to the lower end surface of moving valve plate 10.According to Pascal's law: in the seal container, each point pressure equates, because the area of the logical liquid groove 20 of annular equates substantially with the area on moving valve plate 10 tops, moving valve plate 10 upper and lower end face lifting surface areas are equal and direction is opposite, so the positive pressure that moving valve plate 10 upper and lower end faces are subjected to equates substantially that with backpressure moving valve plate 10 is in the equilibrium of forces state.Variation along with pipeline pressure, on the moving valve plate 10, the lower end surface just, backpressure is also along with variation, and it is equal substantially all the time, therefore, the frictional force that valve opening and closing process externally applied forces only need overcome " O " RunddichtringO and moving valve plate 10 gets final product, there is not direct relation with the pressure of liquid in the pipeline, in the time of need opening valve, only need little power consumption can start micro motor 1, live axle 8 by reduction gears mechanism 3 drives moving valve plate 10 rotations, this moment, locating stop piece 25 was arranged in first grooved photoelectric sensor 21, when moving valve plate 10 and liquid-through hole on the fixed valve plate 11 overlap when opening valve gradually, locating stop piece 25 turns in second grooved photoelectric sensor 21, micro motor 1 stall this moment, and the Open valve process is finished.But otherwise throttle down then.In addition and since moving valve plate 10 upper-end surfaces not tapping make two inclined- planes 34 and 35 of symmetry, not only have guide functions, but also can reduce " water hammer " impact force, reduce the flow-disturbing of liquid, the precision of stable supporting with it metrical instrument to valve block.

Claims (8)

1, a kind of little power consumption electric control valve, comprise micro motor (1), valve body (2), reduction gears mechanism (3), photoelectric sensing apparatus (4) and positioning device (5), micro motor (1) and reduction gears mechanism (3) are arranged on the top of valve body (2), the power input shaft of reduction gears mechanism (3) links to each other with the main shaft of micro motor (1), the live axle (8) of reduction gears mechanism (3) is provided with positioning device (5), the below correspondence of positioning device (5) is provided with photoelectric sensing apparatus (4), it is characterized in that: spool (6) is fixed in the valve body (2) by spool retaining ring (23) and is positioned at the below of reduction gears mechanism (3), the air inlet on the spool (6), liquid mouth (12), give vent to anger, liquid mouth (13) respectively with the air inlet of valve body (2), liquid mouth and giving vent to anger, liquid mouth correspondence; Spool (6) is made of upper bracket (7), lower support frame (9), moving valve plate (10) and fixed valve plate (11), and the central authorities of upper bracket (7) are equipped with live axle (8), and the side is shaped on air inlet, liquid mouth (12), and the below is provided with lower support frame (9); The top of lower support frame (9) is equipped with moving valve plate (10) by valve block positioning ring (14), and valve block positioning ring (14) is by " O " RunddichtringO and lower support frame (9) sealing, moving valve plate (10) is by " O " RunddichtringO and valve block positioning ring (14) sealing, the bottom is fixed with fixed valve plate (11), the upper-end surface of moving valve plate (10) is connected with the underpart of live axle (8), and passes through valve block central shaft (15) activity orientation between moving valve plate (10) and the fixed valve plate (11); Be shaped on first ventilation, liquid hole (16) on the moving valve plate (10), on the lower end surface not tapping be shaped on groove (17) and ventilation, liquid groove (18), and ventilation, liquid groove (18) are ventilated with first, liquid hole (16) communicate; Be shaped on second ventilation, liquid hole (19) on the fixed valve plate (11), on the upper-end surface not tapping be shaped on ring-shaped ventilation, liquid groove (20), and ring-shaped ventilation, liquid groove (20) communicate with ventilation, liquid groove (18) on moving valve plate (10) lower end surface.
2, little power consumption electric control valve according to claim 1 is characterized in that: the area of ring-shaped ventilation, liquid groove (20) equates substantially with the area on moving valve plate (10) top.
3, little power consumption electric control valve according to claim 1 is characterized in that: moving valve plate (10) upper-end surface is the tapping Bevel not.
4, according to claim 1 or 2 or 3 described little power consumption electric control valve, it is characterized in that: photoelectric sensing apparatus (4) and positioning device (5) are positioned at valve body (2), photoelectric sensing apparatus (4) is made of two grooved photoelectric sensors (21) and photoelectric sensor circuit board (22), and grooved photoelectric sensor (21) and photoelectric sensor circuit board (22) are fixed on the upper-end surface of spool retaining ring (23); Positioning device (5) is made of positioning rod (24) and locating stop piece (25), and positioning rod (24) is fixed on the live axle (8), and locating stop piece (25) is fixed on the positioning rod (24), and grooved photoelectric sensor (21) be positioned at locating stop piece (25) under.
5, according to claim 1 or 2 or 3 described little power consumption electric control valve, it is characterized in that: moving valve plate (10) is gone up symmetry and is shaped on two fan-shaped described first ventilation, liquid hole (16), symmetrical two inclined-planes (34,35) are made in upper-end surface not tapping, on the lower end surface not the tapping symmetry be shaped on two fan-shaped described grooves (17) and two described ventilations, liquid groove (18), and two described ventilations, liquid grooves (18) communicate with two fan-shaped described first ventilation, liquid hole (16) respectively; Fixed valve plate (11) is gone up symmetry and is shaped on two fan-shaped described second ventilation, liquid hole (19); Ring-shaped ventilation, liquid groove (20) communicate with two ventilations, liquid groove (18) on moving valve plate (10) lower end surface.
6, according to claim 1 or 2 or 3 described little power consumption electric control valve, it is characterized in that: moving valve plate (10) and fixed valve plate (11) are made by pottery, and ceramic minute surface technology sealing is adopted in the sealing of the two junction plane.
7, according to claim 1 or 2 or 3 described little power consumption electric control valve, it is characterized in that: symmetry is shaped on two cylindrical groove (29,30) on the upper-end surface of moving valve plate (10), the central authorities of connecting rod (31) are fixed on the lower end of live axle (8), the two ends vertical fixing of connecting rod (31) has locating column (32,33), and locating column (32,33) lays respectively in the cylindrical groove (29,30).
8, according to claim 1 or 2 or 3 described little power consumption electric control valve, it is characterized in that: be shaped on second groove (26) on the valve block positioning ring (14), built-in spring (27), the lower end of spring (27) is fixed with steel ball (28), and steel ball (28) withstands on the moving valve plate (10), and moving valve plate (10) is carried out axial limiting.
CNB2004100263874A 2004-08-06 2004-08-06 Mini-consumption electric controlling valve Expired - Fee Related CN100351560C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100263874A CN100351560C (en) 2004-08-06 2004-08-06 Mini-consumption electric controlling valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100263874A CN100351560C (en) 2004-08-06 2004-08-06 Mini-consumption electric controlling valve

Publications (2)

Publication Number Publication Date
CN1598372A CN1598372A (en) 2005-03-23
CN100351560C true CN100351560C (en) 2007-11-28

Family

ID=34663951

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2004100263874A Expired - Fee Related CN100351560C (en) 2004-08-06 2004-08-06 Mini-consumption electric controlling valve

Country Status (1)

Country Link
CN (1) CN100351560C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100348898C (en) * 2005-09-13 2007-11-14 杨晖 Micro power consumption valve core
CN102118128B (en) * 2009-12-31 2013-03-13 北大方正集团有限公司 Control method and device for accurate positioning on stepping motor
CN112539294B (en) * 2021-01-26 2024-01-23 罗邦琴 Gas flow control valve

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109476U (en) * 1991-11-01 1992-07-08 曲艺 Clip type hole-blocking valve
US5664761A (en) * 1994-05-16 1997-09-09 Babcock-Sempell Ag Disk valve
CN2337379Y (en) * 1998-04-15 1999-09-08 重庆先锋电子有限公司 Micro-consumption electric valve
CN2533348Y (en) * 2002-04-22 2003-01-29 杨润德 Control valve
CN2549441Y (en) * 2002-06-25 2003-05-07 罗伟 Intelligent water gauge
CN2563378Y (en) * 2002-08-19 2003-07-30 金行志 Large bore easy open and close slide valve
CN2589768Y (en) * 2002-11-05 2003-12-03 杨晖 Low-power consumption motor valve
CN2742246Y (en) * 2004-08-06 2005-11-23 杨晖 Micro power consumption electric control valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109476U (en) * 1991-11-01 1992-07-08 曲艺 Clip type hole-blocking valve
US5664761A (en) * 1994-05-16 1997-09-09 Babcock-Sempell Ag Disk valve
CN2337379Y (en) * 1998-04-15 1999-09-08 重庆先锋电子有限公司 Micro-consumption electric valve
CN2533348Y (en) * 2002-04-22 2003-01-29 杨润德 Control valve
CN2549441Y (en) * 2002-06-25 2003-05-07 罗伟 Intelligent water gauge
CN2563378Y (en) * 2002-08-19 2003-07-30 金行志 Large bore easy open and close slide valve
CN2589768Y (en) * 2002-11-05 2003-12-03 杨晖 Low-power consumption motor valve
CN2742246Y (en) * 2004-08-06 2005-11-23 杨晖 Micro power consumption electric control valve

Also Published As

Publication number Publication date
CN1598372A (en) 2005-03-23

Similar Documents

Publication Publication Date Title
CN104565506B (en) Valve is with double dynamical integrated explosion-proof electrohydraulic actuator
CN101624087B (en) Anti-rolling tank control device
CN201028120Y (en) Dual four-way sequencing valve
CN100351560C (en) Mini-consumption electric controlling valve
CN2742246Y (en) Micro power consumption electric control valve
CN208749699U (en) A kind of Intelligent gas-liquid executing agency
CN2799994Y (en) Ultra-small integrated electric regulating valve for ship
CN111235006B (en) Micro-valve driving device for nucleic acid amplification micro-fluidic system
CN102661424B (en) Plunger piston type piezoelectric valve based on multi-vibrator tandem drive
CN209385775U (en) A kind of leakage-preventing two-way binary pneumatic operated valve
CN2518134Y (en) Powerless self-response liquid level controller
CN2293690Y (en) Hydraulic opening & closing device for valve
CN205340832U (en) Device with reaction of camshaft control micro -fluidic chip
CN2835733Y (en) Micro power consumption valve core
CN203453543U (en) Electric ceramic core reversing valve
CN201288870Y (en) Six-path flow-direction adjustment panel
CN203685739U (en) Servo valve based on speed difference dynamic pressure feedback hydraulic control guide level
CN106991899A (en) A kind of pneumohydraulic pressure-cylinder teaching aid of Multifunctional demonstration
CN201502775U (en) Superposition double-cylinder actuating mechanism
CN2624008Y (en) Pneumatic control valve
CN2589768Y (en) Low-power consumption motor valve
CN1598376A (en) Adjustable reversing controlling valve
CN2623984Y (en) Conical multifunctional energy-saving valve
CN219932598U (en) Two-way valve capable of opening and closing
CN2742245Y (en) Negative pressure valve

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee