CN207377611U - A kind of low other shut-off valve actuating mechanism of turbine hydraulic system - Google Patents
A kind of low other shut-off valve actuating mechanism of turbine hydraulic system Download PDFInfo
- Publication number
- CN207377611U CN207377611U CN201721080785.3U CN201721080785U CN207377611U CN 207377611 U CN207377611 U CN 207377611U CN 201721080785 U CN201721080785 U CN 201721080785U CN 207377611 U CN207377611 U CN 207377611U
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- CN
- China
- Prior art keywords
- valve
- shut
- low
- solenoid valve
- hydraulic system
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- 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
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Abstract
The utility model discloses a kind of low other shut-off valve actuating mechanism of turbine hydraulic system, and the pressure reducing valve including being mounted on quick closing valve side further includes the fast control slide valve mounted on quick closing valve side, switching soon and controls solenoid valve soon, mounted on the closure plate for opening side soon, mutual connection.The fast control anti-bite ability of solenoid valve replaced is stronger, avoids the accident that pressure oil is caused directly to be communicated with oil return and is shut down due to solenoid valve bite, improves the security and economy of unit operation.
Description
Technical field
The utility model is related to steam turbine hydraulic pressure system technical field, the low side for especially relating to a kind of turbine hydraulic system is closed
Disconnected valve actuating mechanism.
Background technology
The hydraulic system of steam turbine is mainly to low other isolating valve, low other pressure reducing valve, low other water spraying control valve, high other decompression
Valve, high other water spray shut-off valve, the executing agency of high other water spraying control valve provide hydraulic oil.Some hydraulic systems since operation,
Low other shut-off valve often occurs to leak in due to executing agency's solenoid valve bite, guiding valve erosion corrosion, causes pressure oil (P) and oil return
(T) directly communicate and cause the failures such as bypass main pipe low oil pressure, protection shunt tripping oil pump, after causing unit rapid-transport line and removal of load
Bypass can not open, and make boiler heating surface superpressure, and cause boiler extinguishment and shut down, and not only influence unit generation amount but also increase
Required fuel cost is again started up, has seriously affected the security and economy of unit operation.
The reason for pressure oil (P) pressure minimum living is caused to protect shunt tripping oil pump：
In normal operation, low other shut-off valve is closed unit, the quick closing valve solenoid valve of low other shut-off valve and is opened soon
Solenoid valve is not charged, and in an ON state, fast open electromagnetic valve is closed quick closing valve solenoid valve；When unit rapid-transport line,
Low other shut-off valve needs to open when removal of load or tripping, and quick closing valve and fast open electromagnetic valve are charged simultaneously, and quick closing valve solenoid valve, which is in, closes
State, fast open electromagnetic valve is in an ON state.If quick closing valve solenoid valve is stuck, opened soon with quick closing valve solenoid valve all in connecting shape
State thus causes pressure oil and oil return direct short-circuit, system pressure is caused to reduce, and causes bypass low oil pressure shunt tripping oil pump etc.
Failure is bypassed and can not opened after causing unit rapid-transport line and removal of load, makes boiler heating surface superpressure, and cause boiler extinguishment
And it shuts down.
For bypass solenoid valve bite problem, we once replaced bypass oil pipe and installed on-line oil filter additional, went oil removing
In moisture, impurity and acid value, ensure oil in excellent, exclude influence of the oil to solenoid valve.
There is cleaning agent to use alcohol washes instead during solenoid purge valve in maintenance process, avoid corruption of the cleaning agent to solenoid valve
Erosion in addition carrying out regular activity experiment to solenoid valve, avoids the bite of solenoid valve.It can be seen by solenoid valve movement test record
Go out, bypass solenoid valve bite problem at present and significantly reduced, but due to low other shut-off valve when opening its open soon, quick closing valve electromagnetism
Low oil pressure protection shunt tripping oil pump problem still remains caused by valve bite or action are inconsistent, thus gives unit safety operation band
Hidden danger is carried out.
Utility model content
The purpose of this utility model is to provide a kind of low other shut-off valve actuating mechanism of turbine hydraulic system, for solving
Certainly low other shut-off valve when opening its open soon, quick closing valve solenoid valve bite or action it is inconsistent caused by low oil pressure protection shunt tripping oil pump
Problem.
To achieve these goals, the utility model provides a kind of low other shut-off valve execution machine of turbine hydraulic system
Structure, pressure reducing valve (1) and fast control slide valve (2), switching fast (3) and fast control solenoid valve including being mounted on low other shut-off valve quick closing valve side
(4), the closure plate (5) of side is opened soon mounted on low other shut-off valve, they are interconnected.
The fast control solenoid valve (4) is electromagnetic ball valve, which uses Electromagnetic Control, and lever construction, implementation capacity is big, ball
Shape seals, and anti-bite ability is strong.
The sealing aperture of the closure plate (5) is 10mm, and pressure oil can be avoided directly to be communicated with oil return pipe.
The electromagnetic valve coil parameter of the fast control solenoid valve is 180/205V, DC 30W.
The effect of the utility model：After replacing the stronger fast control solenoid valve of anti-bite ability, bypass solenoid valve bite shows
As being solved, avoid due to solenoid valve bite and stopping accident, improve the security and economy of unit operation.
Description of the drawings
Fig. 1 is action schematic diagram of the utility model for a kind of low other shut-off valve actuating mechanism of turbine hydraulic system.
Reference sign：1- pressure reducing valves, the fast control slide valves of 2-, 3- switching devices, 4- control solenoid valve, 5- closure plates, 6- oil soon
Cylinder, 7- fuel feeding manually operated doors, 8- oil return manually operated doors.
Specific embodiment
Below in conjunction with the accompanying drawings to the utility model for a kind of low other shut-off valve actuating mechanism of turbine hydraulic system make into
One step describes：The example is merely to illustrate the utility model rather than limitation the scope of the utility model, people in the art
Member belongs to the application scope as defined in the appended claims to the modification of the various equivalent forms of the utility model.
As shown in Figure 1, the utility model provides a kind of low other shut-off valve actuating mechanism of turbine hydraulic system, including peace
Pressure reducing valve (1) mounted in quick closing valve side further includes the fast control slide valve (2) mounted on low other shut-off valve quick closing valve side, switching fast (3) and soon
Solenoid valve (4) is controlled, opens the closure plate (5) of side soon mounted on low other shut-off valve, they are interconnected.
The fast control solenoid valve (4) is electromagnetic ball valve, and electromagnetic valve coil parameter is 180/205V, DC 30W.The electricity
Magnetic reversing globe valve uses Electromagnetic Control, and lever construction, implementation capacity is big, and spool uses spherical structure, is not easy bite.
DN10 can be selected in the closure plate (5), i.e. the sealing aperture of closure plate (5) is 10mm, it can prevent pressure oil with returning
Oil directly communicates, and without wiring, which is stainless steel, corrosion resistance and good.
Remove the quick closing valve solenoid valve and quick closing valve guiding valve of former quick closing valve side, retain pressure reducing valve (1), load onto new fast control slide valve (2),
Switching device (3) and fast control solenoid valve (4) (fast control slide valve model H51103B, switching device model H51103D, fast control electricity
Magnet valve model H51103A), former pressure reducing valve (1) dress is in situ.The coil parameter for controlling solenoid valve (4) after replacement soon is：180/
205V, DC 30W.
Unit controls solenoid valve (4) and is in power failure state, pressure oil (P) passes through fuel feeding manually operated door soon in normal operation
(7), into servomotor rodless cavity, the oil in rod chamber passes through quick closing valve guiding valve (2), oil return hand for pressure reducing valve (1) and fast control slide valve (2)
Dynamic door (8) is communicated with oil return (T).
When low other shut-off valve is opened, control solenoid valve (4) is charged soon, and hydraulic pressure signal oil by controlling solenoid valve (4) and switching soon
Device (3) enters the hydraulic control chamber of fast control slide valve (2), and fast control slide valve (2) piston moves to right, and pressure oil (P) is manual by fuel feeding
Door (7), pressure reducing valve (1) and fast control slide valve (2) into servomotor rod chamber, oil in rodless cavity by fast control slide valve (2) and time
Oily manually operated door (8) communicates with oil return (T), and valve is opened.
When low other shut-off valve is closed, solenoid valve (4) dead electricity is controlled soon, and hydraulic pressure signal oil disconnects, fast control slide valve (2) hydraulic control
The signal oil of intracavitary is communicated by controlling solenoid valve (4) and switching device (3) soon with oil return, and fast control slide valve (2) piston moves to left, pressure
Oily (P) by pressure reducing valve (1) and fast control slide valve (2) into servomotor rodless cavity, oil in rod chamber by fast control slide valve (2) and
Oil return communicates (T), and valve is closed.
In conclusion the anti-bite ability of the control system of actuating mechanism is strong, reliable in action can rapidly adapt to various accidents
The occurrence of, improve security and economy that equipment is run.
Claims (4)
1. a kind of low other shut-off valve actuating mechanism of turbine hydraulic system, including being mounted on the low other shut-off valve quick closing valve side
Pressure reducing valve (1), which is characterized in that further include interconnection the fast control slide valve (2) for being mounted on the low other shut-off valve quick closing valve side,
Switching device (3) and fast control solenoid valve (4) and the closure plate (5) for opening side soon mounted on the low other shut-off valve.
A kind of 2. low other shut-off valve actuating mechanism of turbine hydraulic system according to claim 1, it is characterised in that institute
It is electromagnetic ball valve to state fast control solenoid valve (4).
A kind of 3. low other shut-off valve actuating mechanism of turbine hydraulic system according to claim 1, it is characterised in that institute
State a diameter of 10mm of sealing hole of closure plate (5).
A kind of 4. low other shut-off valve actuating mechanism of turbine hydraulic system according to claim 1, it is characterised in that institute
The electromagnetic valve coil parameter for stating fast control solenoid valve (4) is 180/205V, DC 30W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721080785.3U CN207377611U (en) | 2017-08-28 | 2017-08-28 | A kind of low other shut-off valve actuating mechanism of turbine hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721080785.3U CN207377611U (en) | 2017-08-28 | 2017-08-28 | A kind of low other shut-off valve actuating mechanism of turbine hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207377611U true CN207377611U (en) | 2018-05-18 |
Family
ID=62342999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721080785.3U Expired - Fee Related CN207377611U (en) | 2017-08-28 | 2017-08-28 | A kind of low other shut-off valve actuating mechanism of turbine hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207377611U (en) |
-
2017
- 2017-08-28 CN CN201721080785.3U patent/CN207377611U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180518 Termination date: 20180828 |