CN107605551A - A kind of lubricating oil pressure screening arrangement - Google Patents
A kind of lubricating oil pressure screening arrangement Download PDFInfo
- Publication number
- CN107605551A CN107605551A CN201710850142.0A CN201710850142A CN107605551A CN 107605551 A CN107605551 A CN 107605551A CN 201710850142 A CN201710850142 A CN 201710850142A CN 107605551 A CN107605551 A CN 107605551A
- Authority
- CN
- China
- Prior art keywords
- oil
- lubricating oil
- housing
- valve
- oil pressure
- 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
Landscapes
- Safety Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention belongs to ship equipment technical field, more particularly to a kind of lubricating oil pressure screening arrangement, the housing, cap nut and reversal valve of centre bore are provided with including centre, the side of housing two is provided with lubricating oil oil inlet, oily breaker oil inlet, power oil oil inlet and oil discharge outlet, wherein lubricating oil oil inlet and oily breaker oil inlet have connects to the pipe of external welding, and flat shoulder grafting head, pad and cap nut equipped with external connection, power oil oil inlet and oil discharge outlet are fixed on housing by pipe joint and pad, and flat shoulder grafting head, pad and cap nut equipped with external connection；Slide valve sleeve is installed on the endoporus of housing, and non-directional guiding valve is installed in slide valve sleeve, and non-directional guiding valve is provided with three convex shoulders, wherein being provided with four damping hydraulic fluid ports for controlling lubricating oil and power oil to switch on two convex shoulders up and down；Housing upper end is provided with lid；Housing lower end be provided with communicated with reversal valve controlling power oil or oil extraction to enter the oilhole of non-directional guiding valve cavity of resorption.
Description
Technical field：
The invention belongs to ship equipment technical field, and in particular to a kind of lubricating oil pressure screening arrangement.
Background technology：
Lubricating oil pressure shielding is primarily used to Steam Turbine in the low reverse steam brake of lubricating oil pressure, the low steamer of cut-out lubricating oil pressure
The rapid closing function of unit.Current naval vessel uses lubricating oil screening arrangement to be carried out using multiple standard components are installed on pipeline
Logical combination forms, and system is scattered and complicated, so that reliability reduces, certain hidden danger to unit safety be present, failure
There is also certain difficulty for diagnosis, maintenance, maintenance etc..So it is very necessary to design a kind of lubricating oil pressure screening arrangement.
The content of the invention：
The present invention is made up and improved in place of above-mentioned the deficiencies in the prior art, there is provided a kind of integrated and simplified lubricating oil pressure screen
Device is covered, makes the system integration and simplifies, improve the reliability of system, be easy to the maintenance, maintenance and fault diagnosis of system, can be with
Promote and use on a large scale.
The technical solution adopted by the present invention is：A kind of lubricating oil pressure screening arrangement, including the middle housing for being provided with centre bore,
Cap nut and reversal valve, the side of housing two are provided with four hydraulic fluid ports, respectively lubricating oil oil inlet, oily breaker oil inlet, power oil
Oil inlet and oil discharge outlet, wherein lubricating oil oil inlet and oily breaker oil inlet have to be connect to the pipe of external welding, and is furnished with and is externally connected
Flat shoulder grafting head, pad and the cap nut connect, the power oil oil inlet and oil discharge outlet are fixed on shell by pipe joint and pad
On body, and flat shoulder grafting head, pad and cap nut equipped with external connection；Slide valve sleeve is installed on the endoporus of housing, indefinite
It is installed on to guiding valve in slide valve sleeve, non-directional guiding valve is provided with three convex shoulders, wherein being provided with up and down on two convex shoulders for controlling
Four damping hydraulic fluid ports of lubricating oil and power oil switching processed；The housing upper end is provided with lid；Housing lower end is provided with and reversal valve
Communicate controlling power oil or oil extraction to enter the oilhole of non-directional guiding valve cavity of resorption.
Described slide valve sleeve is spacing in housing upper by the shaft shoulder.
The cross flower trough for increasing original state and the contact area of oil is provided with the non-directional guiding valve end face.
The housing upper end is provided with the groove of installation O-ring, and upper lid is compressed O-ring by screw and elastic washer, close
The oil pressure of envelope non-directional guiding valve epicoele leaks, and upper cover between slide valve sleeve leaves the gap for preventing mechanical overconstraint, while on
Lid defines the stroke of non-directional guiding valve.
The reversal valve is installed on housing lower end, seal with O ring non-directional guiding valve cavity of resorption by screw, pad and O-ring
Leak.
The housing is provided with four auxiliary mounting holes for being used for that lubricating oil pressure screening arrangement to be fixed.
Described reversal valve is one kind in magnetic valve, hydraulic directional valve or hand-operated direction valve.
Beneficial effects of the present invention：It is reasonable in design, securely and reliably, it is easy to promote and use on a large scale.One kind collection
Into and simplify lubricating oil pressure screening arrangement, make the system integration and simplify, improve the reliability of system, be easy to system maintenance,
Maintenance and fault diagnosis etc.；When system need not shield oily breaker lubricating oil pressure minimum living shield, reversal valve closing driving force oil,
And non-directional guiding valve lower end is led into oil extraction, non-directional sliding valve movement to lower limit position, lubricating oil is led to by non-directional guiding valve upper end
To oily breaker；When system, which sends instruction, needs to shield breaker lubricating oil pressure minimum living shield, reversal valve control non-directional guiding valve
Lower end lead to power oil, upper end leads to lubricating oil, and non-directional guiding valve moves to limes superiors position in the presence of power oil and lubricating oil pressure difference
Put, power oil, which is now communicated to oily breaker lubricating oil pressure minimum living, protects guiding valve lower end, so as to realize the oily breaker lubricating oil of shielding
Pressure protecting function, ensure that main steam turbine group is closed without speed.
Brief description of the drawings：
Fig. 1 is the structural representation of the present invention.
Embodiment：
Reference picture 1, a kind of lubricating oil pressure screening arrangement, including the middle housing 1, cap nut 8 and reversal valve for being provided with centre bore
13, the side of housing 1 two is provided with four hydraulic fluid ports, respectively lubricating oil oil inlet 2, oily breaker oil inlet 3, power oil oil inlet 5 and
Oil discharge outlet 11, wherein lubricating oil oil inlet 2 and oily breaker oil inlet 3 have to be connect to the pipe of external welding, and flat equipped with external connection
Shoulder grafting is first 10, pad 9 and cap nut 8, the power oil oil inlet 5 and oil discharge outlet 11 are fixed by pipe joint 12 and pad 9
In on housing 1, and flat shoulder grafting equipped with external connection is first 10, pad 9 and cap nut 8；Slide valve sleeve 6 is installed on housing 1
On endoporus, and it is installed in slide valve sleeve 6 in the top of housing 1, non-directional guiding valve 7 by the way that the shaft shoulder is spacing, is set on non-directional guiding valve 7
There are three convex shoulders, wherein four damping hydraulic fluid ports for controlling lubricating oil and power oil to switch are provided with two convex shoulders up and down, it is indefinite
The cross flower trough for increasing original state and the contact area of oil is provided with to the end face of guiding valve 7；The upper end of housing 1 is provided with
Upper lid 4, the upper end of housing 1 are provided with the groove of installation O-ring, and upper lid 4 is compressed O-ring by screw and elastic washer, and sealing is not
The oil pressure of the orientation epicoele of guiding valve 7 is leaked, and the gap for preventing mechanical overconstraint, while upper lid are left between upper lid 4 and slide valve sleeve 6
4 define the stroke of non-directional guiding valve 7；The lower end of housing 1 be provided with communicated with reversal valve 13 controlling power oil or row
Oil enters the oilhole of the cavity of resorption of non-directional guiding valve 7；Reversal valve 13 is installed on the lower end of housing 1, O-ring by screw, pad and O-ring
The cavity of resorption of sealing non-directional guiding valve 7 leaks；Housing 1 is provided with four auxiliary for being used to lubricating oil pressure screening arrangement be fixed
Mounting hole.
Lubricating oil pressure screening arrangement is two spool control valves, controls lubricating oil pressure screening arrangement state.Need not in system
When shielding oily breaker lubricating oil pressure minimum living shield, reversal valve closing driving force oil, and the lower end of non-directional guiding valve 7 is led into oil extraction, it is indefinite
Lower limit position is moved to guiding valve 7, lubricating oil passes to oily breaker by the upper end of non-directional guiding valve 7；Needed when system sends instruction
When shielding breaker lubricating oil pressure minimum living shield, reversal valve 13 controls the lower end of non-directional guiding valve 7 to lead to power oil, and upper end is logical to be slided
Oil, non-directional guiding valve 7 move to upper extreme position in the presence of power oil and lubricating oil pressure difference, power oil are now communicated to oil
Breaker lubricating oil pressure minimum living shield guiding valve lower end, so as to realize the oily breaker lubricating oil pressure defencive function of shielding, ensures main steamer
Unit closes without speed, and the device has special mounting hole, can be fixed in some plane, also can be directly mounted on pipeline,
When being directly installed on pipeline, near joints pipeline needs fixing pipe card to be fixed at three.
Embodiment one
When reversal valve 13 elects the normally opened magnetic valve of two-position four-way as, available for remote control, obstructed electricity condition solenoid valve control
The lower end of non-directional guiding valve 7 leads to power oil, and upper end leads to lubricating oil, and guiding valve moves to pole in the presence of power oil and lubricating oil pressure difference
Extreme position, power oil is now communicated to oily breaker lubricating oil pressure minimum living and protects guiding valve lower end, shields oily breaker lubricating oil pressure
Defencive function；The lower end of "on" position solenoid valve control non-directional guiding valve 7 leads to oil extraction, and non-directional guiding valve 7 moves to lower limit position,
Lubricating oil passes to oily breaker by the upper end of non-directional guiding valve 7, does not shield oily breaker lubricating oil pressure defencive function.
Embodiment two
When reversal valve 13 elects two-position four-way normally closed solenoid valve as, available for remote control, "on" position solenoid valve control is indefinite
Lead to power oil to the lower end of guiding valve 7, upper end leads to lubricating oil, and guiding valve moves to limes superiors position in the presence of power oil and lubricating oil pressure difference
Put, power oil, which is now communicated to oily breaker lubricating oil pressure minimum living, protects guiding valve lower end, shields oily breaker lubricating oil pressure protection
Function；The obstructed lower end of electricity condition solenoid valve control non-directional guiding valve 7 leads to oil extraction, and non-directional guiding valve 7 moves to lower limit position, sliding
Oil passes to oily breaker by the upper end of non-directional guiding valve 7, does not shield oily breaker lubricating oil pressure defencive function.
Embodiment three
When reversal valve 13 elects the normally opened hydraulic directional valve of two-position four-way as, available for remote control, the control of disconnection state reversal valve
The lower end of non-directional guiding valve 7 leads to power oil, and upper end leads to lubricating oil, and guiding valve moves to pole in the presence of power oil and lubricating oil pressure difference
Extreme position, power oil is now communicated to oily breaker lubricating oil pressure minimum living and protects guiding valve lower end, shields oily breaker lubricating oil pressure
Defencive function；The lower end of open position reversal valve control non-directional guiding valve 7 leads to oil extraction, and non-directional guiding valve 7 moves to lower limit position,
Lubricating oil passes to oily breaker by the upper end of non-directional guiding valve 7, does not shield oily breaker lubricating oil pressure defencive function.
Example IV
When reversal valve 13 elects the normally closed hydraulic directional valve of two-position four-way as, available for remote control, the control of open position reversal valve
The lower end of non-directional guiding valve 7 leads to power oil, and upper end leads to lubricating oil, and guiding valve moves to pole in the presence of power oil and lubricating oil pressure difference
Extreme position, power oil is now communicated to oily breaker lubricating oil pressure minimum living and protects guiding valve lower end, shields oily breaker lubricating oil pressure
Defencive function；The lower end of disconnection state reversal valve control non-directional guiding valve 7 leads to oil extraction, and non-directional guiding valve 7 moves to lower limit position,
Lubricating oil passes to oily breaker by the upper end of non-directional guiding valve 7, does not shield oily breaker lubricating oil pressure defencive function.
Embodiment five
When reversal valve 13 elects the normally opened hand-operated direction valve of two-position four-way as, available for controlling on the spot, not operation state reversal valve
The lower end of non-directional guiding valve 7 is controlled to lead to power oil, upper end leads to lubricating oil, and guiding valve moves in the presence of power oil and lubricating oil pressure difference
Upper extreme position, power oil is now communicated to oily breaker lubricating oil pressure minimum living and protects guiding valve lower end, shields oily breaker lubricating oil
Pressure protecting function；The lower end of operation state solenoid valve control non-directional guiding valve 7 leads to oil extraction, and non-directional guiding valve 7 moves to limit inferior
Position, lubricating oil pass to oily breaker by the upper end of non-directional guiding valve 7, do not shield oily breaker lubricating oil pressure defencive function.
Embodiment six
When reversal valve 13 elects the normally closed hand-operated direction valve of two-position four-way as, available for controlling on the spot, operation state reversal valve control
The lower end of non-directional guiding valve 7 processed leads to power oil, and upper end leads to lubricating oil, and guiding valve moves in the presence of power oil and lubricating oil pressure difference
Extreme position, power oil is now communicated to oily breaker lubricating oil pressure minimum living and protects guiding valve lower end, shields oily breaker lubricating oil pressure
Try hard to keep protective function；The lower end of operation state solenoid valve control non-directional guiding valve 7 does not lead to oil extraction, and non-directional guiding valve 7 moves to limit inferior
Position, lubricating oil pass to oily breaker by the upper end of non-directional guiding valve 7, do not shield oily breaker lubricating oil pressure defencive function.
Claims (7)
1. a kind of lubricating oil pressure screening arrangement, including the middle housing for being provided with centre bore（1）, cap nut（8）And reversal valve
（13）, it is characterised in that：Housing（1）Two sides are provided with four hydraulic fluid ports, respectively lubricating oil oil inlet（2）, oily breaker oil inlet
（3）, power oil oil inlet（5）And oil discharge outlet（11）, wherein lubricating oil oil inlet（2）With oily breaker oil inlet（3）Have externally
The pipe of welding connects, and the flat shoulder grafting head equipped with external connection（10）, pad（9）And cap nut（8）, the power oil oil inlet
（5）And oil discharge outlet（11）Pass through pipe joint（12）And pad（9）It is fixed on housing（1）On, and the flat shoulder grafting equipped with external connection
Head（10）, pad（9）And cap nut（8）；Slide valve sleeve（6）It is installed on housing（1）Endoporus on, non-directional guiding valve（7）Peace
Loaded on slide valve sleeve（6）It is interior, non-directional guiding valve（7）Three convex shoulders are provided with, wherein being provided with up and down on two convex shoulders for controlling
Lubricating oil and four damping hydraulic fluid ports of power oil switching；The housing（1）Upper end is provided with lid（4）；Housing（1）Lower end be provided with
Reversal valve（13）Communicate controlling power oil or oil extraction to enter non-directional guiding valve（7）The oilhole of cavity of resorption.
A kind of 2. lubricating oil pressure screening arrangement according to claim 1, it is characterised in that：Described slide valve sleeve（6）It is logical
It is spacing in housing to cross the shaft shoulder（1）Top.
A kind of 3. lubricating oil pressure screening arrangement according to claim 1, it is characterised in that：The non-directional guiding valve（7）End
The cross flower trough for increasing original state and the contact area of oil is provided with face.
A kind of 4. lubricating oil pressure screening arrangement according to claim 1, it is characterised in that：The housing（1）Upper end is provided with
The groove of O-ring, upper lid are installed（4）O-ring is compressed by screw and elastic washer, seals non-directional guiding valve（7）Epicoele
Oil pressure leaks, upper lid（4）With slide valve sleeve（6）Between leave the gap for preventing mechanical overconstraint, while upper lid（4）Define not
Orient guiding valve（7）Stroke.
A kind of 5. lubricating oil pressure screening arrangement according to claim 1, it is characterised in that：The reversal valve（13）Pass through spiral shell
Nail, pad and O-ring are installed on housing（1）Lower end, seal with O ring non-directional guiding valve（7）Cavity of resorption leaks.
A kind of 6. lubricating oil pressure screening arrangement according to claim 1, it is characterised in that：The housing（1）It is provided with and uses
In four auxiliary mounting holes that lubricating oil pressure screening arrangement is fixed.
A kind of 7. lubricating oil pressure screening arrangement according to claim 1, it is characterised in that：Described reversal valve（13）For electricity
Magnet valve, hydraulic directional valve or hand-operated direction valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850142.0A CN107605551B (en) | 2017-09-20 | 2017-09-20 | Lubricating oil pressure shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850142.0A CN107605551B (en) | 2017-09-20 | 2017-09-20 | Lubricating oil pressure shielding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107605551A true CN107605551A (en) | 2018-01-19 |
| CN107605551B CN107605551B (en) | 2023-08-01 |
Family
ID=61061227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710850142.0A Active CN107605551B (en) | 2017-09-20 | 2017-09-20 | Lubricating oil pressure shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107605551B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3561489A (en) * | 1967-12-22 | 1971-02-09 | Contraves Ag | Hydraulically or pneumatically controllable slide valve arrangement |
| EP0344122A1 (en) * | 1988-05-27 | 1989-11-29 | SIG Schweizerische Industrie-Gesellschaft | Multi-edge detection valve |
| RU2177064C2 (en) * | 2000-02-08 | 2001-12-20 | Открытое акционерное общество "Калужский турбинный завод" | Turbine protective device |
| RU2248451C1 (en) * | 2003-06-24 | 2005-03-20 | ОАО "Калужский турбинный завод" | Steam turbine electrohydraulic control system |
| CN101153619A (en) * | 2006-09-28 | 2008-04-02 | 沃尔沃建造设备控股（瑞典）有限公司 | Pressure control device for heavy equipment |
| JP2008088851A (en) * | 2006-09-29 | 2008-04-17 | Komatsu Ltd | Variable turbosupercharger and its driving method |
| CN101198813A (en) * | 2005-08-17 | 2008-06-11 | 爱信艾达株式会社 | Spool valve device |
| CN101523025A (en) * | 2006-09-29 | 2009-09-02 | 株式会社小松制作所 | Variable turbo supercharger and method of driving the same |
| JP2011196475A (en) * | 2010-03-19 | 2011-10-06 | Komatsu Ltd | Hydraulic circuit |
| CN203067042U (en) * | 2013-03-11 | 2013-07-17 | 中国船舶重工集团公司第七�三研究所 | Undisturbed ship main steam turbine control switching system |
| CN203515688U (en) * | 2013-09-26 | 2014-04-02 | 浙江华元汽轮机械有限公司 | Emergency governor pilot valve |
| US20140119956A1 (en) * | 2012-11-01 | 2014-05-01 | Hamilton Sundstrand Corporation | Bypass Directional Control Valve |
| EP3029325A1 (en) * | 2014-12-02 | 2016-06-08 | Mitsubishi Heavy Industries, Ltd. | Spool valve, hydraulic machine, and wind turbine power generating apparatus |
| CN207145022U (en) * | 2017-09-20 | 2018-03-27 | 中国船舶重工集团公司第七0三研究所 | A kind of lubricating oil pressure screening arrangement |
-
2017
- 2017-09-20 CN CN201710850142.0A patent/CN107605551B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3561489A (en) * | 1967-12-22 | 1971-02-09 | Contraves Ag | Hydraulically or pneumatically controllable slide valve arrangement |
| EP0344122A1 (en) * | 1988-05-27 | 1989-11-29 | SIG Schweizerische Industrie-Gesellschaft | Multi-edge detection valve |
| RU2177064C2 (en) * | 2000-02-08 | 2001-12-20 | Открытое акционерное общество "Калужский турбинный завод" | Turbine protective device |
| RU2248451C1 (en) * | 2003-06-24 | 2005-03-20 | ОАО "Калужский турбинный завод" | Steam turbine electrohydraulic control system |
| CN101198813A (en) * | 2005-08-17 | 2008-06-11 | 爱信艾达株式会社 | Spool valve device |
| CN101153619A (en) * | 2006-09-28 | 2008-04-02 | 沃尔沃建造设备控股（瑞典）有限公司 | Pressure control device for heavy equipment |
| JP2008088851A (en) * | 2006-09-29 | 2008-04-17 | Komatsu Ltd | Variable turbosupercharger and its driving method |
| CN101523025A (en) * | 2006-09-29 | 2009-09-02 | 株式会社小松制作所 | Variable turbo supercharger and method of driving the same |
| JP2011196475A (en) * | 2010-03-19 | 2011-10-06 | Komatsu Ltd | Hydraulic circuit |
| US20140119956A1 (en) * | 2012-11-01 | 2014-05-01 | Hamilton Sundstrand Corporation | Bypass Directional Control Valve |
| CN203067042U (en) * | 2013-03-11 | 2013-07-17 | 中国船舶重工集团公司第七�三研究所 | Undisturbed ship main steam turbine control switching system |
| CN203515688U (en) * | 2013-09-26 | 2014-04-02 | 浙江华元汽轮机械有限公司 | Emergency governor pilot valve |
| EP3029325A1 (en) * | 2014-12-02 | 2016-06-08 | Mitsubishi Heavy Industries, Ltd. | Spool valve, hydraulic machine, and wind turbine power generating apparatus |
| CN207145022U (en) * | 2017-09-20 | 2018-03-27 | 中国船舶重工集团公司第七0三研究所 | A kind of lubricating oil pressure screening arrangement |
Non-Patent Citations (3)
| Title |
|---|
| 张军堂: "中小型汽轮机轴向位移遮断器控制油压调整方法探讨", 中国设备工程, no. 12, pages 33 - 34 * |
| 栾海峰;刘江;王冲;: "新型船用油动机性能分析及试验研究", 船海工程, no. 01, pages 64 - 66 * |
| 苏镭;: "新型联合汽阀在原料气压缩机组上的应用", 内蒙古石油化工, no. 24, pages 27 - 28 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107605551B (en) | 2023-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203272878U (en) | Integral dual-electric control three-position cross joint medium-pressure solenoid valve | |
| CN107152428B (en) | A kind of highly integrated SERVO CONTROL ultrahigh pressure proportional inserted valve | |
| KR20110116737A (en) | Solenoid latch valve used for high pressure and high flow rate | |
| CN101187427B (en) | Intelligent type high temperature high voltage leakage-free solenoid valve | |
| CN103410985B (en) | Integrated pneumatic ventilation butterfly valve | |
| CN207145022U (en) | A kind of lubricating oil pressure screening arrangement | |
| CN103161975B (en) | Pressure electromagnetic valve in the two automatically controlled 3-position 4-way of integration | |
| CN205479639U (en) | Directly move piston solenoid valve | |
| CN103307324A (en) | Adjusting valve for water supply system of ultra-supercritical unit | |
| CN107605551A (en) | A kind of lubricating oil pressure screening arrangement | |
| CN102162549B (en) | Magnetic dipole valve | |
| CN202946706U (en) | Main steam gate valve with rotary-inserting-type parallel double gate discs | |
| CN2210273Y (en) | Wet type electromagnetic ball valve | |
| CN106764011B (en) | The executing agency of underwater hydraulic control ball valve | |
| CN104265917B (en) | Leakage-free valve | |
| CN106151145B (en) | A kind of water route pressure resistance pilot operated directional control valve | |
| CN207195813U (en) | A kind of integrated switching three-way valve | |
| CN201696340U (en) | Pump shaft sealing device | |
| CN203404389U (en) | Integrated pneumatic ventilation butterfly valve | |
| CN201014038Y (en) | Automatic control combined valve | |
| CN204437297U (en) | High-pressure self-balance piston type regulates throttling stop valve | |
| US20120112104A1 (en) | Actuator for controlling a fluid flow | |
| CN104389831B (en) | A kind of spool-type valves | |
| CN208967182U (en) | DC-AC two-use gas electromagnetic valve | |
| CN203404467U (en) | Water condensation two-position two-way direct-acting electromagnetic valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |