CN103032606A - Dual valve with three-level safety function - Google Patents
Dual valve with three-level safety function Download PDFInfo
- Publication number
- CN103032606A CN103032606A CN201210585897XA CN201210585897A CN103032606A CN 103032606 A CN103032606 A CN 103032606A CN 201210585897X A CN201210585897X A CN 201210585897XA CN 201210585897 A CN201210585897 A CN 201210585897A CN 103032606 A CN103032606 A CN 103032606A
- Authority
- CN
- China
- Prior art keywords
- valve
- cavity
- communicated
- dual
- air
- 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.)
- Granted
Links
Images
Landscapes
- Magnetically Actuated Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention relates to a dual valve with a three-level safety function. A pilot solenoid valve is installed on the upper part of a dual valve body, and a rear valve seat is installed on the rear part of the dual valve body; an air inlet cavity, an air outlet cavity and an air exhaust cavity are formed in the dual valve body, an air inlet, an air outlet and an exhaust port are formed in the rear valve seat, the air inlet is communicated with the air inlet cavity, the air outlet is communicated with the air outlet cavity, the exhaust port is communicated with the air exhaust cavity, the air inlet cavity is communicated with the air inlet of the pilot solenoid valve, and the air exhaust cavity is communicated with a working port of the pilot solenoid valve; and the dual valve is characterized in that an air pressure-electrical signal converter is arranged on one side of the dual valve body and comprises a transmitting body, a micro electric switch is installed in the transmitting body, a cavity body is formed in the transmitting body below the micro electric switch, a transmitting piston is arranged in the cavity body, a transmitting spring is arranged between the transmitting piston and the cavity body, and the lower part of the transmitting piston is communicated with the air outlet cavity. A pressure tap of the air pressure-electrical signal converter is formed on an air outlet loop, so that the measurement is accurate and reliable.
Description
Technical field
The present invention relates to a kind of dual valve of three level security functions, especially a kind of dual valve of three level security functions of the compact structure for mechanical press.
Background technique
All adopt at present both at home and abroad dual valve to control the friction clutch action of air operated friction clutch formula press machine, dual valve says directly in parallel or to intersect two groups of two-bit triplet single entry solenoid valves of mirror image parallel connection integrated and come by suction port, air outlet, relief opening from principle.During power on/off, they commutate simultaneously simultaneously for the coil of two groups of single entry solenoid valves, and the dual valve normal operation just as same two-bit triplet single entry solenoid valve.If wherein one group of main valve plug can not normally be opened or close; the internal structure of dual valve is almost all discharged the pressurized air that enters dual valve from relief opening; the throw-out-of clutch of press machine, to play the safety protection effect, the main Safety function of Here it is dual valve.The probability that two groups of spools break down simultaneously in work cycle is less, thereby the work safety of press machine is improved significantly.Existing dual valve all is the modes that adopt input electrical signal, makes the solenoid valve action, thereby so that suction port and air outlet conducting, dual valve is to clutch or break air feed, the press machine normal operation.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of dual valve with three level security functions is provided, improved the operation precision of dual valve when clutch, the long-term high speed operation of break; And compact structure, small volume.
According to technological scheme provided by the invention, described dual valve with three level security functions, comprise the duplex valve body, the duplex valve body is comprised of two groups of two-bit triplet solenoid valves that are connected in parallel, pilot solenoid valve is installed by guide's valve seat in top at every group of two-bit triplet solenoid valve, at the rear portion of duplex valve body rear valve base is installed; Inside at described duplex valve body is provided with valve pocket, valve pocket is comprised of the air-inlet cavity, outlet chamber and the exhaust cavity that distribute from top to bottom, the dual valve valve core of main valve is set in valve pocket, in the bottom of valve pocket the chassis is set, be connected the main valve Returnning spring between dual valve valve core of main valve and the chassis; Be provided with suction port, air outlet and relief opening at described rear valve base, the air-inlet cavity of suction port and duplex valve body is communicated with, and air outlet and outlet chamber are communicated with, and relief opening and exhaust cavity are communicated with; The air-inlet cavity of described duplex valve body is communicated with guide's suction port of pilot solenoid valve, and the exhaust cavity of duplex valve body is communicated with guide's working hole of pilot solenoid valve, and guide's working hole is blocked by the blocking at dual valve valve core of main valve top mutually with relief opening; It is characterized in that: the side setting at described duplex valve body is no less than an atmospheric pressure-electric signal transducer, atmospheric pressure-electric signal transducer comprises sending unit, micro power switch or approach switch are installed in sending unit, in the sending unit of micro power switch or approach switch bottom, cavity is set, the piston of posting a letter is set in cavity, bottom at cavity arranges the bonnet of posting a letter, the spring of posting a letter is set between the top of the top of the piston of posting a letter and cavity, and the lower cavity of the piston of posting a letter is communicated with the outlet chamber of duplex valve body; Described suction port and air outlet lay respectively at the left and right sides of rear valve base, and relief opening is positioned at the top of rear valve base.
As a further improvement on the present invention, on the top of described micro power switch or approach switch the electric switch terminal jacket is set, the arranged outside switch baffle plate of micro power switch or approach switch.
As a further improvement on the present invention, in the exhaust ports of described rear valve base the second silencer element is set, with exhaust passage that relief opening is communicated with in the first silencer element is set.
As a further improvement on the present invention, the chassis back-up ring being set between described chassis and the valve pocket seals.
Dual valve of the present invention has the following advantages: (1) has improved the operation precision of dual valve when clutch, the long-term high speed operation of break, the pressure tappings of hidden danger (2) atmospheric pressure-electric signal transducer of also having avoided two groups of spools to break down simultaneously bringing is positioned on the air circuit, measures accurately and reliably; (3) relief opening is located at the top of rear valve base, this relief opening postposition towards set-up mode make the dual valve structure compacter.
Description of drawings
Fig. 1 is the schematic diagram with three level security function dual valves of the present invention.
Fig. 2 a is the structural drawing with three level security function dual valves of the present invention.
Fig. 2 b is that the B of Fig. 2 a is to view.
Fig. 2 c is the C-C sectional view of Fig. 2 b.
Fig. 2 d is the A-A sectional view of Fig. 2 c.
Fig. 3 a is the three level security function dual valves working state figure in when energising that has of the present invention.
Fig. 3 b is the working state figure when having three level security function dual valve no electric circuits of the present invention.
Fig. 3 c is the schematic representation that three level security function dual valves are in fault state that has of the present invention.
Embodiment
The invention will be further described below in conjunction with concrete accompanying drawing.
Such as Fig. 1 ~ shown in Figure 3: as described in have three level security function dual valves and comprise pilot solenoid valve 1, guide's valve seat 2, duplex valve body 3, rear valve base 4, the first silencer element 5, the second silencer element 6, electric switch terminal jacket 19, micro power switch or approach switch 20, switch baffle plate 21, sending unit 22, the piston 23 of posting a letter, the spring 24 of posting a letter, the bonnet 25 of posting a letter, dual valve valve core of main valve 26, main valve Returnning spring 27, chassis 28, chassis back-up ring 29, atmospheric pressure-electric signal transducer 30, blocking 31, suction port 32, air outlet 33, relief opening 34, air-inlet cavity 35-1, outlet chamber 35-2, exhaust cavity 35-3, guide's suction port 36-1, guide's working hole 36-2 etc.
Shown in Fig. 2 c, of the present invention have three level security function dual valves and comprise duplex valve body 3, duplex valve body 3 is comprised of two groups of two-bit triplet solenoid valves that are connected in parallel, pilot solenoid valve 1 is installed by guide's valve seat 2 in top at every group of two-bit triplet solenoid valve, at the rear portion of duplex valve body 3 rear valve base 4 is installed; Shown in Fig. 2 a, inside at described duplex valve body 3 is provided with valve pocket, valve pocket is by the air-inlet cavity 35-1 that distributes from top to bottom, outlet chamber 35-2 and exhaust cavity 35-3 form, dual valve valve core of main valve 26 is set in valve pocket, in the bottom of valve pocket chassis 28 is set, chassis back-up ring 29 is set between chassis 28 and the valve pocket to be sealed, be connected main valve Returnning spring 27 between dual valve valve core of main valve 26 and the chassis 28, in cold situation, main valve Returnning spring 27 upwards pushes up dual valve valve core of main valve 26, air-inlet cavity 35-1 is blocked mutually with outlet chamber 35-2, and outlet chamber 35-2 and exhaust cavity 35-3 are conducted; Shown in Fig. 2 d, be provided with suction port 32, air outlet 33 and relief opening 34 at described rear valve base 4, the air-inlet cavity 35-1 of suction port 32 and duplex valve body 3 is communicated with, and air outlet 33 and outlet chamber 35-2 are communicated with, and relief opening 34 and exhaust cavity 35-3 are communicated with; Described suction port 32 and air outlet 33 lay respectively at the left and right sides of rear valve base 4, and relief opening 34 is positioned at the top of rear valve base 4; Shown in Fig. 3 a, Fig. 3 b and Fig. 3 c, the air-inlet cavity 35-1 of described duplex valve body 3 is communicated with guide's suction port 36-1 of pilot solenoid valve 1, the exhaust cavity 35-3 of duplex valve body 3 is communicated with guide's working hole 36-2 of pilot solenoid valve 1, and guide's working hole 36-2 is blocked by the blocking 31 at dual valve valve core of main valve 26 tops mutually with relief opening 34;
Shown in Fig. 2 c, at relief opening 34 places of described rear valve base 4 the second silencer element 6 is set, with exhaust passage that relief opening 34 is communicated with in the first silencer element 5 is set;
Shown in Fig. 2 a, 2b, in a side of described duplex valve body 3 atmospheric pressure-electric signal transducer 30 is set, can arrange one or more; Described atmospheric pressure-electric signal transducer 30 comprises sending unit 22, micro power switch or approach switch 20 are installed in sending unit 22, in the sending unit 22 of micro power switch or approach switch 20 bottoms, cavity is set, the piston 23 of posting a letter is set in cavity, bottom at cavity arranges the bonnet 25 of posting a letter, the spring 24 of posting a letter is set between the top of the top of the piston 23 of posting a letter and cavity, and the lower cavity of the piston 23 of posting a letter is communicated with the outlet chamber 35-2 of duplex valve body 3; When the piston 23 of posting a letter was in the state of zero pressure or low-pressure, because the active force of the spring 24 of posting a letter, the piston 23 of posting a letter did not contact with micro power switch 20; When the piston 23 of posting a letter is under the pressure state, when pressure overcomes the active force of the spring 24 of posting a letter, the piston 23 of posting a letter is moved up, contact with micro power switch or approach switch 20 or approach;
Shown in Fig. 2 a, on the top of described micro power switch or approach switch 20 electric switch terminal jacket 19 is set, the arranged outside switch baffle plate 21 of micro power switch 20 is with protection micro power switch or approach switch 20.
As shown in Figure 1, described design principle with three level security function dual valves be utilize two two-bit triplet solenoid valve 1DT, 2DT simultaneously electric, then atmospheric pressure-electric signal transducer 30 just has the highpressure signal; If two two-bit triplet solenoid valve 1DT, 2DT while dead electricity, then atmospheric pressure-electric signal transducer 30 sends zero air pressure signal.
Shown in Fig. 3 a, two 1 while of pilot solenoid valve input electrical signals, two pilot solenoid valves 1 move simultaneously, pressurized gas enters air-inlet cavity 35-1 by suction port 32, and the guide's suction port 36-1 air inlet by pilot solenoid valve 1 enters exhaust cavity 35-3 by guide's working hole 36-2 again, promoting dual valve valve core of main valve 26 moves down, make air-inlet cavity 35-1 and outlet chamber 35-2 conducting, outlet chamber 35-2 and exhaust cavity 35-3 blocking-up, pressurized air flows to clutch or break by air outlet 33; At this moment, the piston 23 of posting a letter promotes with micro power switch 20 by pressurized gas or approach switch contacts or approaching, sends high-voltage signal;
Shown in Fig. 3 b, two pilot solenoid valves 1 are all inputted without electrical signal, because the effect of main valve Returnning spring 27, dual valve valve core of main valve 26 recovers nature, air-inlet cavity 35-1 and outlet chamber 35-2 block mutually, outlet chamber 35-2 and exhaust cavity 35-3 are conducted, and the pressurized air in clutch, the break is discharged by relief opening 34, guarantees the Security of dual valve; At this moment because the effect of spring 24 of posting a letter, the piston 23 of posting a letter do not contact with micro power switch or approach switch 20 or away from, send the zero pressure signal;
Shown in Fig. 3 c, one group of two-position three way magnetic valve is working properly, and another group two-position three way magnetic valve action was lost efficacy, and micro power switch or approach switch 20 send zero pressure signal or low-pressure signal.
Claims (4)
1. dual valve with three level security functions, comprise duplex valve body (3), duplex valve body (3) is comprised of two groups of two-bit triplet solenoid valves that are connected in parallel, pilot solenoid valve (1) is installed by guide's valve seat (2) in top at every group of two-bit triplet solenoid valve, at the rear portion of duplex valve body (3) rear valve base (4) is installed; Inside at described duplex valve body (3) is provided with valve pocket, valve pocket is comprised of the air-inlet cavity (35-1), outlet chamber (35-2) and the exhaust cavity (35-3) that distribute from top to bottom, dual valve valve core of main valve (26) is set in valve pocket, chassis (28) is set in the bottom of valve pocket, is connected main valve Returnning spring (27) between dual valve valve core of main valve (26) and chassis (28); Be provided with suction port (32), air outlet (33) and relief opening (34) at described rear valve base (4), the air-inlet cavity (35-1) of suction port (32) and duplex valve body (3) is communicated with, air outlet (33) and outlet chamber (35-2) are communicated with, and relief opening (34) and exhaust cavity (35-3) are communicated with; The air-inlet cavity (35-1) of described duplex valve body (3) is communicated with guide's suction port (36-1) of pilot solenoid valve (1), the exhaust cavity (35-3) of duplex valve body (3) is communicated with guide's working hole (36-2) of pilot solenoid valve (1), and guide's working hole (36-2) is blocked by the blocking (31) at dual valve valve core of main valve (26) top mutually with relief opening (34); It is characterized in that: the side setting at described duplex valve body (3) is no less than an atmospheric pressure-electric signal transducer (30), atmospheric pressure-electric signal transducer (30) comprises sending unit (22), micro power switch or approach switch (20) are installed in sending unit (22), in the sending unit (22) of micro power switch or approach switch (20) bottom, cavity is set, the piston (23) of posting a letter is set in cavity, bottom at cavity arranges the bonnet (25) of posting a letter, the spring (24) of posting a letter is set between the top of the top of the piston of posting a letter (23) and cavity, and the lower cavity of the piston of posting a letter (23) is communicated with the outlet chamber (35-2) of duplex valve body (3); Described suction port (32) and air outlet (33) lay respectively at the left and right sides of rear valve base (4), and relief opening (34) is positioned at the top of rear valve base (4).
2. the dual valve that has as claimed in claim 1 three level security functions, it is characterized in that: the top at described micro power switch or approach switch (20) arranges electric switch terminal jacket (19), the arranged outside switch baffle plate (21) of micro power switch approach switch (20).
3. as claimed in claim 1 have three level security function dual valves, it is characterized in that: the relief opening (34) in described rear valve base (4) locates to arrange the second silencer element (6), with exhaust passage that relief opening (34) is communicated with in the first silencer element (5) is set.
4. dual valve as claimed in claim 1 is characterized in that: chassis back-up ring (29) is set between described chassis (28) and the valve pocket seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585897.XA CN103032606B (en) | 2012-12-28 | 2012-12-28 | Dual valve with three-level safety function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585897.XA CN103032606B (en) | 2012-12-28 | 2012-12-28 | Dual valve with three-level safety function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103032606A true CN103032606A (en) | 2013-04-10 |
| CN103032606B CN103032606B (en) | 2014-06-11 |
Family
ID=48019826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210585897.XA Active CN103032606B (en) | 2012-12-28 | 2012-12-28 | Dual valve with three-level safety function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103032606B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318161A (en) * | 2013-07-08 | 2013-09-25 | 瑞立集团瑞安汽车零部件有限公司 | Interception valve |
| CN103496190A (en) * | 2013-09-29 | 2014-01-08 | 无锡市拓发自控设备有限公司 | Safety dual electromagnetic valve for mechanical press |
| CN106195350A (en) * | 2016-10-09 | 2016-12-07 | 无锡市拓发自控设备有限公司 | Safe duplex electromagnetic valve |
| CN107246489A (en) * | 2017-02-09 | 2017-10-13 | 常州中进医疗器材有限公司 | A kind of magnetic valve |
| CN107830212A (en) * | 2017-11-30 | 2018-03-23 | 安徽中捷矿山运输设备有限责任公司 | 3 position-5 way Pneumatic reversal valve |
| CN108368947A (en) * | 2015-12-14 | 2018-08-03 | Smc株式会社 | Manifold for electromagnetic valve assembly and use its electromagnetic valve aggregate |
| TWI712755B (en) * | 2018-08-24 | 2020-12-11 | 日商阿自倍爾Ｔａ股份有限公司 | Cross-flow type double valve and manufacturing method of cross-flow type double valve housing |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3858606A (en) * | 1973-08-23 | 1975-01-07 | Ross Operating Valve Co | Safety control valve system for fluid actuated devices |
| US4269225A (en) * | 1977-12-16 | 1981-05-26 | Technomatic Ag | Safety valve assembly |
| CN101025174A (en) * | 2006-02-02 | 2007-08-29 | 罗斯控制阀公司 | Dynamic fluid power monitoring system for separate actuators |
| CN201446733U (en) * | 2009-07-17 | 2010-05-05 | 无锡市拓发自控设备有限公司 | Safety control double-valve used for pressing machine |
| CN201501122U (en) * | 2009-09-21 | 2010-06-09 | 无锡市拓发自控设备有限公司 | Safety dual valve for pressure machine |
| CN201587143U (en) * | 2009-09-18 | 2010-09-22 | 无锡市拓发自控设备有限公司 | Safely control duplex valve used for power-off protection type forcing press |
| CN101642967B (en) * | 2009-07-17 | 2011-05-11 | 无锡市拓发自控设备有限公司 | Safety-control double valve for press |
| CN101659131B (en) * | 2009-09-18 | 2011-11-30 | 无锡市拓发自控设备有限公司 | Safety control double-valve for power-off protection type press machine |
| CN203009924U (en) * | 2012-12-28 | 2013-06-19 | 无锡市拓发自控设备有限公司 | Double valve with three-level safety function |
-
2012
- 2012-12-28 CN CN201210585897.XA patent/CN103032606B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3858606A (en) * | 1973-08-23 | 1975-01-07 | Ross Operating Valve Co | Safety control valve system for fluid actuated devices |
| US4269225A (en) * | 1977-12-16 | 1981-05-26 | Technomatic Ag | Safety valve assembly |
| CN101025174A (en) * | 2006-02-02 | 2007-08-29 | 罗斯控制阀公司 | Dynamic fluid power monitoring system for separate actuators |
| CN201446733U (en) * | 2009-07-17 | 2010-05-05 | 无锡市拓发自控设备有限公司 | Safety control double-valve used for pressing machine |
| CN101642967B (en) * | 2009-07-17 | 2011-05-11 | 无锡市拓发自控设备有限公司 | Safety-control double valve for press |
| CN201587143U (en) * | 2009-09-18 | 2010-09-22 | 无锡市拓发自控设备有限公司 | Safely control duplex valve used for power-off protection type forcing press |
| CN101659131B (en) * | 2009-09-18 | 2011-11-30 | 无锡市拓发自控设备有限公司 | Safety control double-valve for power-off protection type press machine |
| CN201501122U (en) * | 2009-09-21 | 2010-06-09 | 无锡市拓发自控设备有限公司 | Safety dual valve for pressure machine |
| CN203009924U (en) * | 2012-12-28 | 2013-06-19 | 无锡市拓发自控设备有限公司 | Double valve with three-level safety function |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318161B (en) * | 2013-07-08 | 2015-12-02 | 瑞立集团瑞安汽车零部件有限公司 | A kind of intercepter valve (IV) |
| CN103318161A (en) * | 2013-07-08 | 2013-09-25 | 瑞立集团瑞安汽车零部件有限公司 | Interception valve |
| CN103496190A (en) * | 2013-09-29 | 2014-01-08 | 无锡市拓发自控设备有限公司 | Safety dual electromagnetic valve for mechanical press |
| CN103496190B (en) * | 2013-09-29 | 2015-05-13 | 无锡市拓发自控设备有限公司 | Safety dual electromagnetic valve for mechanical press |
| US11092255B2 (en) | 2015-12-14 | 2021-08-17 | Smc Corporation | Manifold assembly for electromagnetic valve and electromagnetic valve cluster using same |
| CN108368947A (en) * | 2015-12-14 | 2018-08-03 | Smc株式会社 | Manifold for electromagnetic valve assembly and use its electromagnetic valve aggregate |
| CN108368947B (en) * | 2015-12-14 | 2022-10-28 | Smc株式会社 | Manifold assembly for solenoid valve and solenoid valve assembly using the same |
| CN106195350A (en) * | 2016-10-09 | 2016-12-07 | 无锡市拓发自控设备有限公司 | Safe duplex electromagnetic valve |
| CN106195350B (en) * | 2016-10-09 | 2019-04-30 | 无锡市拓发自控设备有限公司 | Safe duplex solenoid valve |
| CN107246489A (en) * | 2017-02-09 | 2017-10-13 | 常州中进医疗器材有限公司 | A kind of magnetic valve |
| CN107830212A (en) * | 2017-11-30 | 2018-03-23 | 安徽中捷矿山运输设备有限责任公司 | 3 position-5 way Pneumatic reversal valve |
| CN107830212B (en) * | 2017-11-30 | 2024-03-26 | 安徽中捷矿山运输设备有限责任公司 | Three-position five-way air control reversing valve |
| TWI712755B (en) * | 2018-08-24 | 2020-12-11 | 日商阿自倍爾Ｔａ股份有限公司 | Cross-flow type double valve and manufacturing method of cross-flow type double valve housing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103032606B (en) | 2014-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103032606B (en) | Dual valve with three-level safety function | |
| CN102518609B (en) | High Speed Punch Hydraulic System | |
| CN201255257Y (en) | Power constant control valve | |
| CN109779993B (en) | Electric proportional load sensitive multi-way valve | |
| CN201344288Y (en) | Dual-electromagnet two-position four-way ball valve | |
| CN103438238B (en) | Three way type Pilot operated check valve | |
| CN203009924U (en) | Double valve with three-level safety function | |
| CN203361153U (en) | Novel pile hammer hydraulic control system | |
| CN201501122U (en) | Safety dual valve for pressure machine | |
| CN101224625B (en) | High pressure model-locked loop of double movable plate direct press injection machine | |
| CN104165166A (en) | Compact-type telescopic oil cylinder changeover valve set | |
| CN103192816B (en) | Multichannel control pressure relay valve | |
| CN201339617Y (en) | Booster oil cylinder | |
| CN208793352U (en) | A kind of function switch solenoid valve block and hydraulic system | |
| CN105179349A (en) | Automatic pressure switching selector valve | |
| CN203009923U (en) | Rotary double valve with three-level safety function | |
| CN103075545B (en) | Rotary dual valve with three-level safety function | |
| CN103496190A (en) | Safety dual electromagnetic valve for mechanical press | |
| CN108980134A (en) | A kind of Novel universal vertical roll of rolling crossbeam compression hydraulic system | |
| CN202391845U (en) | Universal control valve | |
| CN106855070A (en) | A kind of proportional flow inserted valve and its control method | |
| CN205478035U (en) | High pressure fuel solenoid valve | |
| CN203510773U (en) | Safe dual solenoid valve for mechanical press | |
| CN102287164A (en) | Control valve for hydraulic well mouth safety valve control system | |
| CN203051839U (en) | Electromagnetic 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 |