CN203809429U - Mechanical quick-break integrated electro-hydraulic actuator - Google Patents
Mechanical quick-break integrated electro-hydraulic actuator Download PDFInfo
- Publication number
- CN203809429U CN203809429U CN201320805812.4U CN201320805812U CN203809429U CN 203809429 U CN203809429 U CN 203809429U CN 201320805812 U CN201320805812 U CN 201320805812U CN 203809429 U CN203809429 U CN 203809429U
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- CN
- China
- Prior art keywords
- hydraulic cylinder
- hydraulic actuator
- integrated electro
- piston rod
- electromagnetic valve
- 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 - Lifetime
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- 230000008092 positive effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000002407 reforming Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The utility model provides a mechanical quick-break integrated electro-hydraulic actuator, and aims to solve the problems that at present, according to the integrated electro-hydraulic actuator for driving a turbine valve, an electromagnetic valve is controlled by electric power, so that the reliability is poor. The mechanical quick-break integrated electro-hydraulic actuator is characterized in that the piston rod of a single-acting type hydraulic cylinder is connected with an emergency push button of an electromagnetic valve; a return spring is arranged in one cavity of the single-acting type hydraulic cylinder, and low-pressure security oil of which the hydraulic pressure is less than or equal to 0.3MPa is arranged in the other cavity of the single-acting type hydraulic cylinder; the direction of the connection is limited by the retractation direction of the piston rod of the single-acting type hydraulic cylinder; the return spring is in a cut-off state when being compressed. The mechanical quick-break integrated electro-hydraulic actuator has the positive effects that the action of the electromagnetic valve is controlled by hydraulic pressure instead of electric power, so the reliability is greatly improved; particularly, for some integrated electro-hydraulic actuators, the low-pressure security oil is used for controlling the existing electromagnetic valve, so the reconstruction cost is remarkably reduced.
Description
Technical field
The utility model relates to the integrated electric hydraulic actuator of driving steam turbine porthole operation, is specifically to use low pressure security personnel's oil security personnel's oil (being less than or equal to 0.3MPa) to control the integrated electric hydraulic actuator that solenoid valve is realized snap-action.
Background technique
The integrated electric hydraulic actuator of driving steam turbine porthole aperture comprises that drive porthole two go out the quick acting loop of rod oil cylinder, electromagnetic valve and the normal operating loop that hydraulic power unit is controlled.Integrated electric hydraulic actuator is when normality, solenoid valve cut-off, quick acting loop disconnects, twoly go out rod oil cylinder and in the control of normal operating loop, lower the aperture of restrictor, the control of realization to the load of steam turbine or speed, now the spring loaded on one of them piston rod is always in confined state, when needs quick closedown or unlatching steam turbine porthole, give solenoid valve charged, solenoid valve conduction, quick acting loop is connected, two two chambeies that go out rod oil cylinder are connected by quick acting loop, two piston rod operations fast under the effect of spring loaded that go out rod oil cylinder, the quick closedown or open in 0.3 second of driving steam turbine porthole, be that it is by electric control solenoid valve, realize the snap-action of final controlling element, if now controlling electricity breaks down, solenoid valve is failure to actuate, quick acting loop is inoperative, cannot realize like this quick closedown or the unlatching of porthole, security personnel's oil of steam turbine is inoperative, and then cause steam turbine accident.
Summary of the invention
For improving integrated electric hydraulic actuator reliability of operation, reduce reforming cost, the purpose of this utility model is to propose a kind of improvement project, i.e. the integrated electric hydraulic actuator of mechanical type snap-action for existing integrated electric hydraulic actuator.
The purpose of this utility model is achieved in that it comprises by the quick acting loop of electromagnetic valve, is characterized in that: the piston rod of single-acting formula oil hydraulic cylinder is connected with the emergency button of solenoid valve; Said single-acting formula oil hydraulic cylinder refers in a chamber of this oil hydraulic cylinder Returnning spring is set, and another chamber arranges the low pressure security personnel oil that hydraulic pressure is less than or equal to 0.3MPa; The direction of said connection is defined as that the piston rod of single-acting formula oil hydraulic cylinder is retracted, Returnning spring when compressed solenoid valve be cut-off state.During normality, single-acting formula oil hydraulic cylinder is under the effect of said low pressure security personnel oil pressure, compressing Returnning spring, piston rod is retracted, solenoid valve is cut-off state, quick acting loop disconnects, and twoly goes out rod oil cylinder and in the control of normal operating loop, lowers the aperture of restrictor, realizes the control to the load of steam turbine or speed.When needs quick closedown or unlatching steam turbine porthole, remove security personnel's oil, single-acting formula hydraulic cylinder piston rod is under the effect of Returnning spring, stretch out fast, promote emergency button, then promote valve core of the electromagnetic valve, make solenoid valve conduction, two two chambeies that go out rod oil cylinder are connected by quick acting loop, two piston rod operations fast under the effect of spring loaded that go out rod oil cylinder, the quick closedown or open in 0.3 second of driving steam turbine valve.
Compared with prior art, good effect of the present utility model is: by electric control, change the action of solenoid valve into hydraulic control, not affected by power supply, greatly improved integrated electric hydraulic actuator reliability of operation; Particularly on the integrated electric hydraulic actuator having, use the low pressure security personnel oil that is less than or equal to 0.3MPa to control existing solenoid valve, significantly reduced reforming cost.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, further illustrate the utility model.
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is the A portion enlarged view of Fig. 1.
Embodiment
The piston rod 12 of single-acting formula oil hydraulic cylinder 1 is connected with the emergency button 21 of solenoid valve 2; Said single-acting formula oil hydraulic cylinder refers in a chamber of this oil hydraulic cylinder Returnning spring 11 is set, and another chamber arranges the low pressure security personnel oil 13 that hydraulic pressure equals 0.3MPa; The direction of said connection is defined as that the piston rod of single-acting formula oil hydraulic cylinder is retracted, Returnning spring when compressed solenoid valve be cut-off state.During normality, single-acting formula oil hydraulic cylinder is under the effect of said low pressure security personnel oil pressure, compressing Returnning spring, piston rod is retracted, solenoid valve is cut-off state, quick acting loop disconnects, and twoly goes out rod oil cylinder 3 and in the control of normal operating loop 4, lowers the aperture of restrictor, realizes the control to the load of steam turbine or speed.When needs quick closedown or unlatching steam turbine porthole, remove security personnel's oil, single-acting formula hydraulic cylinder piston rod is under the effect of Returnning spring, stretch out fast, promote emergency button, then promote valve core of the electromagnetic valve, make solenoid valve conduction, two two chambeies that go out rod oil cylinder are connected by quick acting loop, two piston rod 32 operations fast under the effect of spring loaded 31 that go out rod oil cylinder, the quick closedown or open in 0.3 second of driving steam turbine valve.
Claims (1)
1. an integrated electric hydraulic actuator for mechanical type snap-action, it comprises by the quick acting loop of electromagnetic valve, it is characterized in that: the piston rod of single-acting formula oil hydraulic cylinder is connected with the emergency button of solenoid valve; Said single-acting formula oil hydraulic cylinder refers in a chamber of this oil hydraulic cylinder Returnning spring is set, and another chamber arranges the low pressure security personnel oil that hydraulic pressure is less than or equal to 0.3MPa; The direction of said connection is defined as that the piston rod of single-acting formula oil hydraulic cylinder is retracted, Returnning spring when compressed solenoid valve be cut-off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320805812.4U CN203809429U (en) | 2013-12-10 | 2013-12-10 | Mechanical quick-break integrated electro-hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320805812.4U CN203809429U (en) | 2013-12-10 | 2013-12-10 | Mechanical quick-break integrated electro-hydraulic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809429U true CN203809429U (en) | 2014-09-03 |
Family
ID=51448186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320805812.4U Expired - Lifetime CN203809429U (en) | 2013-12-10 | 2013-12-10 | Mechanical quick-break integrated electro-hydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809429U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629194A (en) * | 2013-12-10 | 2014-03-12 | 沈阳东北电力调节技术有限公司 | Mechanical quick-operation type integrated electro-hydraulic actuator |
| CN107387786A (en) * | 2017-03-02 | 2017-11-24 | 成都凯远流体控制工程有限公司 | Have the multi-functional pressure/flow control valve and its operating method of good sealing property concurrently |
-
2013
- 2013-12-10 CN CN201320805812.4U patent/CN203809429U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629194A (en) * | 2013-12-10 | 2014-03-12 | 沈阳东北电力调节技术有限公司 | Mechanical quick-operation type integrated electro-hydraulic actuator |
| CN103629194B (en) * | 2013-12-10 | 2015-11-25 | 沈阳东北电力调节技术有限公司 | The integrated electric hydraulic actuator of mechanical type snap-action |
| CN107387786A (en) * | 2017-03-02 | 2017-11-24 | 成都凯远流体控制工程有限公司 | Have the multi-functional pressure/flow control valve and its operating method of good sealing property concurrently |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |