CN202851476U - Rapid automatic air exhaust device - Google Patents
Rapid automatic air exhaust device Download PDFInfo
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- CN202851476U CN202851476U CN 201220462672 CN201220462672U CN202851476U CN 202851476 U CN202851476 U CN 202851476U CN 201220462672 CN201220462672 CN 201220462672 CN 201220462672 U CN201220462672 U CN 201220462672U CN 202851476 U CN202851476 U CN 202851476U
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- water
- pressure transducer
- pressure sensor
- valve controller
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Abstract
A rapid automatic air exhaust device is arranged in a water jet type air exhauster and comprises a first pressure sensor, a second pressure sensor and a third pressure sensor, wherein the first pressure sensor is arranged in a water jet pump water outlet pipeline, the second pressure sensor is arranged in a mixing chamber of an air exhauster and the third pressure sensor is arranged in an air exhaust pipeline between the air exhauster and a condenser. The rapid automatic air exhaust device further comprises a compressed air two-position three-way electromagnetic valve controller and a corresponding single-action pneumatic actuator. In three channels, one channel is connected with an air resource, and the other two channels are respectively connected with an air inlet of the pneumatic actuator and an air outlet of the pneumatic actuator. The three pressure sensors are electrically connected with the two-position three-way electromagnetic valve controller through a signal cable. A rapid air exhaust valve is arranged in the water outlet pipeline between the water jet pump and the air exhauster and is electrically connected with the two-position three-way electromagnetic valve controller. The rapid automatic air exhaust device can quickly and automatically eliminate air in a pump when air blockage occurs in an outlet side of the water jet pump (condenser pump) or pump outlet pressure drops, so that air blockage phenomenon can be eliminated and normal operation of the device can be ensured.
Description
Technical field
The utility model relates to a kind of automatic exhaust device, particularly a kind of fast automatic air-discharging device, and the empty vapour in the fast automatic eliminating vacuum sealing system is eliminated the vent plug phenomenon and is improved device efficiency.Be applicable to air ejector and the condensate system of bleeder steam system.
Background technique
A kind of typical water of the water-jet type air extractor of steam turbine, gas two phase flow device, the required momentum of vapor phase movement are all from the water bundle, and gas with optimal cross section and flow velocity, is realized the high efficiency of suction chamber in water particle " wrapping up in suction " lower motion.Referring to Fig. 1, after the water of jetting case 10 does work through water-jet pump 20, the nozzle that utilizes high-velocity flow to pass through water jet air ejector 30 returns incident water tank 10, and in the mixing chamber 301 of water jet air ejector 30, utilize high-velocity flow to take away incoagulable steam and air in the condenser 40, make steam turbine keep high vacuum, keep steam turbine and normally move.
In the running of present steam turbine, find following two kinds of situations:
1, the vent plug phenomenon can occur in the water-jet pump outlet side of steam turbine (air ejector inlet side), (normal operating pressure is about 0.4MPa to cause the water-jet pump outlet pressure to descend, and show according to relevant operating conditions, water-jet pump pressure is minimum can to fall to 0.25MPa,) such as the A place among Fig. 1, can't guarantee the water-jet type air extractor normal operation.
When 2, temperature is low in the winter time, when thermoelectric unit is sent out load adjustment, when particularly generation load is low, because the throttle flow of condenser is less, cause condenser efficiency and significantly improve phenomenon, even the negative pressure that reaches condenser side is lower than the negative pressure of air ejector side, adjusts the untimely water-jet type air extractor industry water that will occur this moment by condenser the bleed situation of condensate system of tracheae of finding time.
The consequence that this measure causes is:
1, destroys steam turbine water of condensation-boiler feed circulatory system, caused boiler water quality to worsen.Reduce boiler working life.If operation in time to boiler carry out blowdown, the steam turbine water of condensation is discharged, and utilizes the displacement of a large amount of pure water to open and increases water quality, and causes energy cost to increase.If operate untimelyly, long-play will affect the working life of boiler.
2, cause water-jet type air extractor to lose efficacy, directly have influence on the vacuum of steam turbine.The accident that steam turbine is shut down because vacuum is poor will occur in long-time not catchcry.
Equally, the condensate extractionpump system of steam turbine also can be owing to a variety of causes together vent plug phenomenon, leaking-in air, the condensate extractionpump outlet pressure descends, and (normal operating pressure is about 0.6MPa, and show according to relevant operating conditions, pressure is minimum can to fall to 0.25MPa), cause condenser efficiency to reduce, can't keep unit and normally move.
Run into above problem: the method for usually taking is artificial fast to the on-the-spot air-discharging operation of carrying out relevant device, on-the-spot vent plug phenomenon, in the accident treatment process, also must take diverse ways for not being both equipment, if operate untimely or operate miss, will affect unit when serious and normally move.
For the retrieval of the vent plug phenomenon of water-jet pump and condensate extractionpump, do not find correlation technique through on the net.But at present for usually using automatic control pressure vent to get rid of ducted air on the industry water pipeline, if be applied on this complete equipment then have more problem, can't normally use: automatic control pressure vent belongs to the normally open valve door, automatically to control according to the flow pressure of industry water to carry out air-discharging, and native system equipment relates to vacuum system, also needs when needing leakproofness to control according to the pressure reduction of bleed side, condenser side both sides.
Summary of the invention
The purpose of this utility model is to provide a kind of fast automatic air-discharging device, can the vent plug phenomenon can occur at water-jet pump (condensate extractionpump) outlet side, air when pump discharge pressure descends in the automatically quick blowdown pump is eliminated the vent plug phenomenon, guarantees that equipment normally moves.
For achieving the above object, the technical solution of the utility model is:
A kind of fast automatic air-discharging device, be arranged in the water-jet type air extractor, it comprises, the first～the 3rd pressure transducer, the first pressure transducer is arranged in the water-jet pump rising pipe, the second pressure transducer is arranged in the mixing chamber of air ejector, and the 3rd pressure transducer is arranged in the exhaust pipe between air ejector and the condenser, and is electrically connected to steam turbine water of condensation control system by signal cable respectively; Pressurized air two-bit triplet solenoid valve controller and corresponding single-acting pneumatic actuator, a passage is connected with source of the gas in its three passages, and suction port, relief opening that two other passage connects respectively actuator connect; Pressurized air two-bit triplet solenoid valve controller is electrically connected to steam turbine water of condensation control system by signal cable; Rapid escape valve is arranged in the rising pipe between water-jet pump and the air ejector, is electrically connected pressurized air two-bit triplet solenoid valve controller, and its switch is controlled by the controller.
Further, described pressure transducer is piezoresistive pressure transducer.
Pressurized air uses as the power gas source of control two-bit triplet solenoid valve, can directly pick out from 3.6 meters platform pressurized air of steam turbine terminal (pressure is 0.5MPa approximately).
The beneficial effects of the utility model:
This practical fast automatic air-discharging device is sensed manifold pressure by pressure transducer and is changed rear (unit exception operating mode), by the automatic air of getting rid of fast in the pipeline of fast evacuation device of air, eliminate vent plug phenomenon in the pipeline, guarantee that equipment normally moves when improving accident handling efficient.
Description of drawings
Fig. 1 is steam turbine generator water-jet type air extractor working principle schematic diagram;
Fig. 2 is the utility model embodiment's structural representation.
Embodiment
Referring to Fig. 2, fast automatic air-discharging device of the present utility model, be arranged in the water-jet type air extractor, it comprises, the first～the 3rd pressure transducer the 1～3, first pressure transducer 1 is arranged in water-jet pump 20 rising pipes, and the second pressure transducer 2 is arranged in the mixing chamber 301 of air ejector 30, the 3rd pressure transducer 3 is arranged in the exhaust pipe between air ejector 30 and the condenser 40, and respectively by signal cable 5,5 ', 5 " be electrically connected to steam turbine water of condensation control system 100; Pressurized air two-bit triplet solenoid valve controller 4 and corresponding single-acting pneumatic actuator, its three passages 7,7 ', 7 " in a passage be connected with source of the gas, suction port, relief opening that two other passage connects respectively actuator connect; Pressurized air two-bit triplet solenoid valve controller is electrically connected to steam turbine water of condensation control system 100 by signal cable; Rapid escape valve 6 is arranged in the rising pipe between water-jet pump 20 and the air ejector 30, is electrically connected pressurized air two-bit triplet solenoid valve controller 4, and its switch is controlled by the controller.
In the present embodiment, described pressure transducer 1～3 adopts piezoresistive pressure transducer.
When having air to bleed in the steam turbine water-jet pump pipeline, water-jet pump 20 is exerted oneself and descended, and (normal operating pressure is 0.4MPa, the minimum 0.2MPa that once dropped to) the pressure transducer output signal enters steam turbine water of condensation control system, when steam turbine water of condensation control system 100 is set a value 0.25MPa when pressure≤0.25MPa, steam turbine water of condensation control system is sent signal to auxiliary reclay, action was opened after the closed pressurized air two-bit triplet of auxiliary reclay normally opened contact solenoid valve controller 4 was subjected to electricity, and pressurized air control rapid escape valve 6 is opened and carried out the automatic releasing air.
When bleeder steam side negative pressure (the second pressure transducer 2)＜condenser side negative pressure (the 3rd pressure transducer 3), reach auxiliary reclay by sending signal after the steam turbine water of condensation control system 100, move after auxiliary reclay normally opened contact disconnection pressurized air two-bit triplet solenoid valve controller 4 dead electricity and close, pressurized air rapid escape valve 6 cuts out, the operation of water-jet pump 20 nominal situations.
This practical fast evacuation device of air is by being installed in different equipment positions, effectively raise simultaneously the accident handling ability of operator when equipment generation vent plug phenomenon, avoid the untimely phenomenon of accident handling that occurs owing to personnel shortage, reduced the labor intensity of operator in the accident handling process.
Claims (2)
1. a fast automatic air-discharging device is arranged in the water-jet type air extractor, it is characterized in that, comprise,
The first～the 3rd pressure transducer, the first pressure transducer is arranged in the water-jet pump rising pipe, the second pressure transducer is arranged in the mixing chamber of air ejector, the 3rd pressure transducer is arranged in the exhaust pipe between air ejector and the condenser, and is electrically connected to steam turbine water of condensation control system by signal cable respectively;
Pressurized air two-bit triplet solenoid valve controller and corresponding single-acting pneumatic actuator, a passage is connected with source of the gas in its three passages, and suction port, relief opening that two other passage connects respectively actuator connect; Pressurized air two-bit triplet solenoid valve controller is electrically connected to steam turbine water of condensation control system by signal cable;
Rapid escape valve is arranged in the rising pipe between water-jet pump and the air ejector, is electrically connected pressurized air two-bit triplet solenoid valve controller, and its switch is controlled by the controller.
2. fast automatic air-discharging device as claimed in claim 1 is characterized in that, described pressure transducer is piezoresistive pressure transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462672 CN202851476U (en) | 2012-09-11 | 2012-09-11 | Rapid automatic air exhaust device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462672 CN202851476U (en) | 2012-09-11 | 2012-09-11 | Rapid automatic air exhaust device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202851476U true CN202851476U (en) | 2013-04-03 |
Family
ID=47982683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220462672 Expired - Fee Related CN202851476U (en) | 2012-09-11 | 2012-09-11 | Rapid automatic air exhaust device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202851476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714837A (en) * | 2019-11-06 | 2020-01-21 | 四川航天中天动力装备有限责任公司 | Turbojet engine lubricating oil system |
-
2012
- 2012-09-11 CN CN 201220462672 patent/CN202851476U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714837A (en) * | 2019-11-06 | 2020-01-21 | 四川航天中天动力装备有限责任公司 | Turbojet engine lubricating oil system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130403 Termination date: 20160911 |