CN204663914U - Feed water pump anti cavitation device - Google Patents
Feed water pump anti cavitation device Download PDFInfo
- Publication number
- CN204663914U CN204663914U CN201520277492.9U CN201520277492U CN204663914U CN 204663914 U CN204663914 U CN 204663914U CN 201520277492 U CN201520277492 U CN 201520277492U CN 204663914 U CN204663914 U CN 204663914U
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- Prior art keywords
- oxygen
- eliminating device
- pressure
- control valve
- water pump
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Abstract
The utility model provides a kind of feed water pump anti cavitation device, comprising: pressure detecting instrument, controller, deaerator pressure control valve; Described pressure detecting instrument is arranged on oxygen-eliminating device, for detecting oxygen-eliminating device inner steam pressure value; The input end Bonding pressure detector of described controller, output terminal connects deaerator pressure control valve; Described deaerator pressure control valve is arranged on main steam on the pipeline of oxygen-eliminating device, for regulating main steam to the steam supplying amount of oxygen-eliminating device inside, to regulate oxygen-eliminating device inner steam pressure.Above-mentioned feed water pump anti cavitation device, by being arranged on oxygen-eliminating device upward pressure detector, controller and be arranged on main steam on the pipeline of oxygen-eliminating device deaerator pressure control valve form, for regulating oxygen-eliminating device inner steam pressure; The control of the inner steam pressure value to oxygen-eliminating device can be realized, under load rejection operating mode, effectively can prevent the cavitation of feed water pump.
Description
Technical field
The utility model relates to technical field of electric power, particularly relates to a kind of feed water pump anti cavitation device.
Background technique
Feed water pump is the important power equipment of nuclear power plant's secondary circuit, and the cavitation of feed water pump can cause pump to shake, and destroys metallic material, flow, lift is declined, can cause Feed Pump Trip time serious, causes nuclear island to be jumped piling, relevant device cannot normally be run.
Cause the main cause of feed water pump cavitation to be the too low or hypotony of the liquid level of oxygen-eliminating device owing to being connected with feed water pump, generally, the rate of descent of oxygen-eliminating device inner steam pressure value is greater than the removal of load operating mode that a certain value is called as unit; Prior art only can prevent the cavitation of feed water pump usually at steady state; Lack the device preventing feed water pump cavitation under load rejection operating mode.
Model utility content
Based on this, be necessary the technical problem lacking the device preventing feed water pump cavitation under load rejection operating mode for prior art, a kind of feed water pump anti cavitation device is provided.
A kind of feed water pump anti cavitation device, comprising: pressure detecting instrument, controller, deaerator pressure control valve;
Described pressure detecting instrument is arranged on oxygen-eliminating device, for detecting oxygen-eliminating device inner steam pressure value;
The input end Bonding pressure detector of described controller, output terminal connects deaerator pressure control valve;
Described deaerator pressure control valve is arranged on main steam on the pipeline of oxygen-eliminating device, for regulating main steam to the steam supplying amount of oxygen-eliminating device inside, to regulate oxygen-eliminating device inner steam pressure.
Above-mentioned feed water pump anti cavitation device, by being arranged on oxygen-eliminating device upward pressure detector, controller and be arranged on main steam on the pipeline of oxygen-eliminating device deaerator pressure control valve form, for regulating oxygen-eliminating device inner steam pressure; The control of the inner steam pressure value to oxygen-eliminating device can be realized, under load rejection operating mode, effectively can prevent the cavitation of feed water pump.
Accompanying drawing explanation
Fig. 1 is the feed water pump anti cavitation device structural representation of an embodiment;
Fig. 2 is the feed water pump anti cavitation device structural representation of a preferred embodiment;
Fig. 3 is the feed water pump anti cavitation device structural representation of another embodiment.
Embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing to feed water pump anti cavitation device of the present utility model.
With reference to figure 1, Figure 1 shows that the feed water pump anti cavitation device structural representation of an embodiment, comprising: pressure detecting instrument 10, controller 30, deaerator pressure control valve 50;
Described pressure detecting instrument 10 is arranged on oxygen-eliminating device, for detecting oxygen-eliminating device inner steam pressure value;
The input end Bonding pressure detector 10 of described controller 30, output terminal connects deaerator pressure control valve 50;
Described deaerator pressure control valve 50 is arranged on main steam on the pipeline of oxygen-eliminating device, for regulating main steam to the steam supplying amount of oxygen-eliminating device inside, to regulate oxygen-eliminating device inner steam pressure.
The feed water pump anti cavitation device that the present embodiment provides, by being arranged on oxygen-eliminating device upward pressure detector 10, controller 30 and be arranged on main steam and form to the deaerator pressure control valve 50 on the pipeline of oxygen-eliminating device, for regulating oxygen-eliminating device inner steam pressure; The control of the inner steam pressure value to oxygen-eliminating device can be realized, under load rejection operating mode, effectively can prevent the cavitation of feed water pump.
In one embodiment, above-mentioned feed water pump anti cavitation device can also comprise pressure inlet tube, and one end of described pressure inlet tube passes into oxygen-eliminating device inside, and the other end is socketed described pressure detecting instrument.Above-mentioned oxygen-eliminating device can from its inner extraction pressure inlet tube, and pressure inlet tube vapour pressure value is consistent with the vapour pressure value of oxygen-eliminating device inside, and such pressure detecting instrument is the inner steam pressure value of oxygen-eliminating device in the vapour pressure value that above-mentioned pressure inlet tube detects.
With reference to figure 2, Figure 2 shows that the feed water pump anti cavitation device structural representation of a preferred embodiment, as diagram, above-mentioned feed water pump anti cavitation device can also comprise rest-set flip-flop 40; The output terminal of the input end connection control device 30 of described rest-set flip-flop 40, rest-set flip-flop 40, diverter circuit 60; The output terminal of the input end connection control device 30 of described rest-set flip-flop 40, the output terminal of rest-set flip-flop 40 connects the input end of diverter circuit 60, and the output terminal of described diverter circuit 60 connects deaerator pressure control valve 50.
In one embodiment, above-mentioned deaerator pressure control valve can be many grades of modulating valve; Described deaerator pressure control valve can comprise one grade that is provided with and keeps oxygen-eliminating device inner steam pressure function, and is provided with the second gear regulating oxygen-eliminating device inner steam pressure function.One grade of above-mentioned deaerator pressure control valve by regulating the vapour pressure of oxygen-eliminating device inside more by a small margin, can keep oxygen-eliminating device inner steam pressure to make the vapour pressure value mode be fixed in a certain scope; Its second gear can regulate oxygen-eliminating device inner steam pressure by the mode of oxygen-eliminating device inner steam pressure being carried out to quick adjustment.
Above-mentioned deaerator pressure control valve is many grades of modulating valve, and arrange one grade that keeps oxygen-eliminating device inner steam pressure function, and regulate the second gear of oxygen-eliminating device inner steam pressure function, oxygen-eliminating device can be made to keep its former vapour pressure in normal operation, when needs regulate oxygen-eliminating device inner steam pressure value, deaerator pressure control valve is adjusted to second gear, the vapour pressure of oxygen-eliminating device inside is regulated, make the vapour pressure value of oxygen-eliminating device inside be unlikely to too low and cause the cavitation of feed water pump.
In one embodiment, above-mentioned controller can be DCS controller.DCS (Distributed ControlSystem, distributed control system) controller has higher operational capability and stability, and the present embodiment middle controller adopts DCS controller can improve the stability of feed water pump anti cavitation device.
In one embodiment, above-mentioned feed water pump anti cavitation device can be as shown in Figure 3, comprise: pressure detecting instrument 62, controller 63, deaerator pressure control valve 64 and pressure inlet tube 62, as diagram, one end of above-mentioned pressure inlet tube 62 can pass into oxygen-eliminating device inside, the other end can be socketed described pressure detecting instrument, and the vapour pressure value in pressure inlet tube is consistent with the vapour pressure value of oxygen-eliminating device inside, and such pressure detecting instrument is the inner steam pressure value of oxygen-eliminating device in the vapour pressure value that above-mentioned pressure inlet tube detects; Above-mentioned deaerator pressure control valve 64 can be arranged on main steam on the pipeline of oxygen-eliminating device 61.
Be more than embodiment of the present utility model, in order to clearly embody technique effect of the present utility model, set forth again below and adopting feed water pump anti cavitation device of the present utility model example in actual applications.
Above-mentioned pressure detecting instrument detects the inner steam pressure value of oxygen-eliminating device, and described inner steam pressure value is sent to controller; Wherein, above-mentioned controller can adopt the controller with differentiate function and arbitration functions on market, controller can according to received inner steam pressure value, the function calculating of differentiating carried by controller goes out the vapour pressure rate of descent of oxygen-eliminating device inside, and judges described vapour pressure rate of descent whether in the scope of controller setting by the arbitration functions of controller; If not in the scope of setting, controller sends high level signal to deaerator pressure control valve; Deaerator pressure control valve regulates the inner steam pressure of oxygen-eliminating device according to described high level signal, carries out the pressurize of oxygen-eliminating device;
If described vapour pressure rate of descent is in the scope of setting, controller sends low level signal to deaerator pressure control valve; Deaerator pressure control valve keeps the inner steam pressure of oxygen-eliminating device according to described low level signal.
Between controller and deaerator pressure control valve, also rest-set flip-flop can be installed, diverter circuit, by differentiate function and arbitration functions that it carries, controller judges that the vapour pressure rate of descent of oxygen-eliminating device inside is whether in the scope of controller setting, if not in the scope of setting, controller can send high level signal and hold to the S of rest-set flip-flop, now, rest-set flip-flop exports high level signal to diverter circuit, diverter circuit can generate switching signal according to above-mentioned high level signal and be sent to deaerator pressure control valve, deaerator pressure control valve receives above-mentioned switching signal, and be adjusted to its second gear according to switching signal, make the quick standard-sized sheet of its steam supply regulatory function, to regulate the vapour pressure of oxygen-eliminating device inside, pressurize is carried out to oxygen-eliminating device.
Differentiate function and arbitration functions that controller can also be carried by it judge that the vapour pressure rate of descent of oxygen-eliminating device inside is whether in the scope of controller setting, if in the scope of setting, controller transmission high level signal is held to the R of rest-set flip-flop, now, rest-set flip-flop output low level signal is sent to deaerator pressure control valve by diverter circuit, deaerator pressure control valve is adjusted to one grade, and its inner steam pressure is remained in certain scope.
Each technical characteristics of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristics in above-described embodiment is not all described, but, as long as the combination of these technical characteristicss does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a feed water pump anti cavitation device, is characterized in that, comprising: pressure detecting instrument, controller, deaerator pressure control valve;
Described pressure detecting instrument is arranged on oxygen-eliminating device, for detecting oxygen-eliminating device inner steam pressure value;
The input end Bonding pressure detector of described controller, output terminal connects deaerator pressure control valve;
Described deaerator pressure control valve is arranged on main steam on the pipeline of oxygen-eliminating device, for regulating main steam to the steam supplying amount of oxygen-eliminating device inside, to regulate oxygen-eliminating device inner steam pressure.
2. feed water pump anti cavitation device according to claim 1, is characterized in that, also comprise pressure inlet tube, and one end of described pressure inlet tube passes into oxygen-eliminating device inside, and the other end is socketed described pressure detecting instrument.
3. feed water pump anti cavitation device according to claim 1, is characterized in that, also comprises rest-set flip-flop, diverter circuit; The output terminal of the input end connection control device of described rest-set flip-flop, the output terminal of rest-set flip-flop connects the input end of diverter circuit, and the output terminal of described diverter circuit connects deaerator pressure control valve.
4. feed water pump anti cavitation device according to claim 1, is characterized in that, described deaerator pressure control valve is many grades of modulating valve; Described deaerator pressure control valve comprises one grade that is provided with and keeps oxygen-eliminating device inner steam pressure function, and is provided with the second gear regulating oxygen-eliminating device inner steam pressure function.
5. feed water pump anti cavitation device according to claim 1, is characterized in that, described controller is DCS controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520277492.9U CN204663914U (en) | 2015-04-30 | 2015-04-30 | Feed water pump anti cavitation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520277492.9U CN204663914U (en) | 2015-04-30 | 2015-04-30 | Feed water pump anti cavitation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204663914U true CN204663914U (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520277492.9U Expired - Fee Related CN204663914U (en) | 2015-04-30 | 2015-04-30 | Feed water pump anti cavitation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204663914U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321878A (en) * | 2021-12-22 | 2022-04-12 | 江苏核电有限公司 | Transient pressure control method for deaerator during large-amplitude load shedding of nuclear power unit |
-
2015
- 2015-04-30 CN CN201520277492.9U patent/CN204663914U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321878A (en) * | 2021-12-22 | 2022-04-12 | 江苏核电有限公司 | Transient pressure control method for deaerator during large-amplitude load shedding of nuclear power unit |
| CN114321878B (en) * | 2021-12-22 | 2023-08-15 | 江苏核电有限公司 | Transient pressure control method for deaerator during large-amplitude load shedding of nuclear power unit |
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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 |
Granted publication date: 20150923 |
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| CF01 | Termination of patent right due to non-payment of annual fee |