CN203272946U - Local control device for main steam isolating valve and main feed water isolating valve of nuclear power plant - Google Patents
Local control device for main steam isolating valve and main feed water isolating valve of nuclear power plant Download PDFInfo
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- CN203272946U CN203272946U CN 201320016688 CN201320016688U CN203272946U CN 203272946 U CN203272946 U CN 203272946U CN 201320016688 CN201320016688 CN 201320016688 CN 201320016688 U CN201320016688 U CN 201320016688U CN 203272946 U CN203272946 U CN 203272946U
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Abstract
The utility model discloses a local control device for a main steam isolating valve and a main feed water isolating valve of a nuclear power plant. The local control device comprises a local human-computer interface module, an alarm, indication and signal processing module, a normal operation driving module, and a protection, engineered driving and testing module. Main functional tests of the main steam isolating valve and the main feed water isolating valve, which are locally performed, are implemented by a pre-designed local control logic device; and valve misoperation caused by testing of the main steam isolating valve and the main feed water isolating valve by a maintainer during the normal operation period of the power plant is reduced. Meanwhile, the local control logic device can be arranged away from the main steam isolating valve and the main feed water isolating valve for a certain distance and is more suitable for a working environment region of the maintainer, and the working comfort of a field maintainer can be better ensured.
Description
Technical field
The utility model belongs to nuclear power plant's operation technique field, is specifically related to a kind of nuclear power plant main steam, main feed water isolating valve local control device.
Background technique
Main steam isolation valve and main feed water isolating valve belong to Nuclear safety related equipment, play safety effect in nuclear power plant, must guarantee when ad hoc signal sends that valve closes within the short time that requires, start and shutdown stage requirement main steam, main feed water isolating valve can be realized normal open and close function in MCR Master Control Room in nuclear power plant.
According to the requirement of 4.5 testabilitys in China Nuclear safety guide rule HAD102-14, valve need to stay open state for a long time when normal operation, and security-related Instrumentation and Control system must be able to regularly test and calibrate.These tests must be comprehensive check as far as possible, and can carry out on the spot easily.According to the guide rule requirement, all must carry out in-service closing test to main steam isolation valve every month, namely closes to 90% from 100% aperture, then return to 100% aperture from 90% aperture.
Should possess the requirement of periodic test function according to nuclear power plant's protective system and relevant device thereof; and consider that main steam and main feed water isolating valve device structure are comparatively complicated, general kernel power plant need to formulate comparatively complicated inspection and maintenance rules for this valve and fluid pressure drive device.These complicated inspection and maintenance rules cause the maintainer's of power plant training difficulty, also cause the problems such as the complexity of maintenance process quality control and repair cycle be long.
Because main steam, main feed water isolating valve equipment itself are comparatively complicated, and place power plant regional environment is comparatively abominable, these have all additionally increased the difficulty of overhaul of the equipments, and may cause extra mistake of when maintenance, and these mistakes functions of the equipments fault that may cause.Some periodic tests possibly can't be carried out at power plant's normal operation period by this maintenance mode in addition, and must grade carry out during to power plant's shutdown, may cause like this potential faults of some main steams, main feed water isolating valve.
Main steam, main feed water isolating valve belong to the hydraulic driving separation valve door, and its actuator is comprised of equipment such as pneumatic, control block hydraulic unit with and solenoid valves.By can better realize protection periodic maintenance requirement relevant with ad hoc equipment for on-site control of valve design.For the maintenance man of power plant on the spot the control logic device can facilitate for on-the-spot test, saved the test time of power plant's normal operation period, reduced simultaneously power plant's normal operation period main steam, main feed water isolating valve have been carried out the maintenance period, the valve malfunction that may cause due to mistake.Main steam, main feed water isolating valve logic control device on the spot can be as valve signal collection, pretreatment and dispensing devices, satisfy different functional departments of nuclear power plant to the monitoring requirement of valve, thereby better meet the state of valve own and valve to the diagnosis requirement of the various function effects of power plant.
Main steam isolation valve and main feed water isolating valve belong to Nuclear safety related equipment; when sending main steam and main feedwater isolation signals, nuclear power plant protection and ad hoc drive system must guarantee that valve closes within the short time of nuclear power plant's requirement; valve need to stay open state for a long time when normal operation; start and shutdown stage requirement main steam in nuclear power plant, main feed water isolating valve can be realized normal open and close function in MCR Master Control Room.In order to realize the Safety function of nuclear power plant; this valve is provided with two kinds of travel speeds; a kind of is normal running speed; expression is from the valve wide open to the complete shut-down; then from the valve complete shut-down to standard-sized sheet, approximately 20 seconds valve event time, another kind accident conditions; when control system received protection and ad hoc signal, valve must guarantee to close in shorter several seconds.
Should possess the requirement of periodic test function according to nuclear power plant's protective system and relevant device thereof; and consider that main steam and main feed water isolating valve device structure are comparatively complicated, general kernel power plant need to formulate comparatively complicated inspection and maintenance rules for this valve and fluid pressure drive device.These complicated maintenance procedures cause the maintainer's of power plant training difficulty, also cause the problems such as cycle stretch-out of the judgement of maintenance process quality control and maintenance result.
Because main steam, main feed water isolating valve place power plant regional environment is comparatively abominable, and because main steam, main feed water isolating valve equipment itself are comparatively complicated, these have all additionally increased the difficulty of overhaul of the equipments, and may cause the functions of the equipments fault that when overhauling, extra mistake causes.Some routine tests possibly can't be carried out at power plant's normal operation period by this maintenance mode in addition, and must grade carry out during to power plant's shutdown, may cause like this potential faults of some main steams, main feed water isolating valve.
Summary of the invention
The purpose of model utility is the defective that overcomes prior art, and a kind of separating valve local control device that can design in advance control logic, the misoperation when main steam, main feed water isolating valve are tested in minimizing and can guarantee preferably field maintenance personnel's work travelling comfort is provided.
To achieve these goals, the technical solution of the utility model is, a kind of nuclear power plant main steam, main feed water isolating valve local control device, comprise human-machine interface module on the spot, warning, indication and signal processing module normally move driver module, protection, ad hoc driving and test module; Wherein, after protection, ad hoc driving and test module receive the emergency cut-off signal of the main steam isolation valve of nuclear power plant's protection, the transmission of ad hoc system or main feed water isolating valve, the control valve drive unit cuts out rapidly main steam isolation valve or main feed water isolating valve; Human-machine interface module receives main steam isolation valve or the switch state signal of main feed water isolating valve and state signal and the demonstration of safe active component that sends from warning, indication and signal processing module on the spot; Human-machine interface module sends the switch testing signal of main steam isolation valve or main feed water isolating valve for protection, ad hoc driving and test module on the spot; Protection, ad hoc driving and test module receive the test signal of human-machine interface module transmission on the spot, test one by one the switch of valve actuator of main steam isolation valve or main feed water isolating valve and the functional status of safe active component according to the working specification of nuclear power station; Switch state signal and safe active component state signal when test is completed the late gate drive unit and will be tested send to warning, indication and signal processing module; Warning, indication and signal processing module are classified switch state signal and safe active component state signal: the switch state signal of valve and safe active component state signal feed back to human-machine interface module on the spot, the state signal of the switch state signal of valve and sign valve actuator main performance sends to the MCR Master Control Room man-machine interface, the master-control room operator judge by above-mentioned state signal whether the state of valve actuator is normal, and as the case may be, notify the local operation personnel test and safeguard according to the working specification of nuclear power station; On the spot human-machine interface module receive also that the MCR Master Control Room man-machine interface sends permission signal or inhibit signal, and complete following functions according to the signal difference:
1. after the permission signal that the man-machine interface of reception MCR Master Control Room is sent, human-machine interface module sends the switch order signal of main steam isolation valve or main feed water isolating valve for normal operation driver module on the spot, after normal operation driver module receives the switch order signal, control the valve actuator of main steam isolation valve or main feed water isolating valve, realize opening or closing of main steam isolation valve or main feed water isolating valve;
2. after the inhibit signal that the man-machine interface of reception MCR Master Control Room is sent, human-machine interface module stops sending the switch order signal of main steam isolation valve or main feed water isolating valve to normal operation driver module on the spot; At this moment, inhibit signal do not affect protect, the work of ad hoc driving and test module.
The main steam isolation valve of the protection of described nuclear power plant, the transmission of ad hoc system or the emergency cut-off signal of main feed water isolating valve are that the override level is processed; At this moment, the test function of on-the-spot test personnel execution will be by bypass.
In the difference in functionality module of described each function module between the safe level passage, and should guarantee physical isolation between safe level and non-security grade of passage.
The utility model is all realized main steam, main feed water isolating valve in the major function test of carrying out on the spot by the pre-designed device of control logic on the spot, reduced the valve misoperation that the maintenance man may cause because of test main steam, main feed water isolating valve at power plant's normal operation period.Simultaneously, this on the spot the control logic device can be arranged in apart from main steam, main feed water isolating valve certain distance, be fit to the environmental area of personnel's work, can guarantee preferably field maintenance personnel's work travelling comfort.
Description of drawings
Fig. 1 is control principle drawing of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
A kind of nuclear power plant main steam, main feed water isolating valve local control device as shown in Figure 1, comprise human-machine interface module on the spot, and warning, indication and signal processing module normally move driver module, protection, ad hoc driving and test module; Wherein, after protection, ad hoc driving and test module receive the emergency cut-off signal of the main steam isolation valve of nuclear power plant's protection, the transmission of ad hoc system or main feed water isolating valve, the control valve drive unit cuts out rapidly main steam isolation valve or main feed water isolating valve, this process should be processed as the override level, and the test function that on-the-spot test this moment personnel carry out will be by bypass; Human-machine interface module receives main steam isolation valve or the switch state signal of main feed water isolating valve and state signal and the demonstration of safe active component (such as solenoid valve, pressure switch, liquid-level switch etc.) that sends from warning, indication and signal processing module on the spot; Human-machine interface module sends the switch testing signal of main steam isolation valve or main feed water isolating valve for protection, ad hoc driving and test module on the spot; Protection, ad hoc driving and test module receive the test signal of human-machine interface module transmission on the spot, test one by one the switch of valve actuator of main steam isolation valve or main feed water isolating valve and the functional status of safe active component according to the working specification of nuclear power station; Switch state signal and safe active component state signal when test is completed the late gate drive unit and will be tested send to warning, indication and signal processing module; Warning, indication and signal processing module are classified switch state signal and safe active component state signal: the switch state signal of valve and safe active component state signal feed back to human-machine interface module on the spot, the state signal of the switch state signal of valve and sign valve actuator main performance sends to the MCR Master Control Room man-machine interface, the master-control room operator judge by above-mentioned state signal whether the state of valve actuator is normal, and as the case may be, notify the local operation personnel test and safeguard according to the working specification of nuclear power station; On the spot human-machine interface module receive also that the MCR Master Control Room man-machine interface sends permission signal or inhibit signal, and complete following functions according to the signal difference: 1. after the permission signal that the man-machine interface of reception MCR Master Control Room is sent, human-machine interface module sends the switch order signal of main steam isolation valve or main feed water isolating valve for normal operation driver module on the spot, after normal operation driver module receives the switch order signal, control the valve actuator of main steam isolation valve or main feed water isolating valve, realize opening or closing of main steam isolation valve or main feed water isolating valve; 2. after the inhibit signal that the man-machine interface of reception MCR Master Control Room is sent, human-machine interface module stops sending the switch order signal of main steam isolation valve or main feed water isolating valve to normal operation driver module on the spot; At this moment, inhibit signal do not affect protect, the work of ad hoc driving and test module.
In the difference in functionality module of each function module between the safe level passage, and should guarantee physical isolation between safe level and non-security grade of passage.
Main steam, main feed water isolating valve belong to the hydraulic driving separation valve door, and its actuator is comprised of equipment such as pneumatic, control block hydraulic unit with and solenoid valves.By can better realize protection periodic maintenance requirement relevant with ad hoc equipment for on-site control of valve design.For the maintenance man of power plant on the spot the control logic device can facilitate for on-the-spot test, saved the test time of power plant's normal operation period, reduced simultaneously power plant's normal operation period main steam, main feed water isolating valve have been carried out the maintenance period, the valve malfunction that may cause due to mistake.Main steam, main feed water isolating valve logic control device on the spot can satisfy different functional departments of nuclear power plant to monitoring and the test request of valve as valve signal collection, pretreatment and dispensing device, thereby better meet diagnosis and the maintenance requirement of valve.
The art of this patent has obtained to use at 1, No. 2 unit of Chashma Nuclear Power Plant of Pakistan, and up to the present applicable cases is good.Preferably resolve main steam, main feed water isolating valve problem difficult in maintenance.The maintenance technique means of main steam isolation valve and main feed water isolating valve have been improved.By accumulated running time of more than ten years nearly, proved this device effectively and reliable.
The above has done detailed description to embodiment of the present utility model, above-mentioned mode of execution is only optimum embodiment of the present utility model, but the utility model is not limited to above-described embodiment, in the ken that those of ordinary skills possess, can also make various variations under the prerequisite that does not break away from the utility model aim.
Claims (1)
1. nuclear power plant's main steam, main feed water isolating valve local control device, is characterized in that comprising human-machine interface module on the spot, and warning, indication and signal processing module normally move driver module, protection, ad hoc driving and test module; Wherein, after protection, ad hoc driving and test module receive the emergency cut-off signal of the main steam isolation valve of nuclear power plant's protection, the transmission of ad hoc system or main feed water isolating valve, the control valve drive unit cuts out rapidly main steam isolation valve or main feed water isolating valve; Human-machine interface module receives main steam isolation valve or the switch state signal of main feed water isolating valve and state signal and the demonstration of safe active component that sends from warning, indication and signal processing module on the spot; Human-machine interface module sends the switch testing signal of main steam isolation valve or main feed water isolating valve for protection, ad hoc driving and test module on the spot; Protection, ad hoc driving and test module receive the test signal of human-machine interface module transmission on the spot, the switch of the valve actuator of test main steam isolation valve or main feed water isolating valve and the functional status of safe active component; Switch state signal and safe active component state signal when test is completed the late gate drive unit and will be tested send to warning, indication and signal processing module; Warning, indication and signal processing module are classified switch state signal and safe active component state signal: the switch state signal of valve and safe active component state signal feed back to human-machine interface module on the spot, and the state signal of the switch state signal of valve and sign valve actuator main performance sends to the MCR Master Control Room man-machine interface; On the spot human-machine interface module receive also that the MCR Master Control Room man-machine interface sends permission signal or inhibit signal, and complete following functions according to the signal difference:
1. after the permission signal that the man-machine interface of reception MCR Master Control Room is sent, human-machine interface module sends the switch order signal of main steam isolation valve or main feed water isolating valve for normal operation driver module on the spot, after normal operation driver module receives the switch order signal, control the valve actuator of main steam isolation valve or main feed water isolating valve, realize opening or closing of main steam isolation valve or main feed water isolating valve;
2. after the inhibit signal that the man-machine interface of reception MCR Master Control Room is sent, human-machine interface module stops sending the switch order signal of main steam isolation valve or main feed water isolating valve to normal operation driver module on the spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016688 CN203272946U (en) | 2013-01-14 | 2013-01-14 | Local control device for main steam isolating valve and main feed water isolating valve of nuclear power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320016688 CN203272946U (en) | 2013-01-14 | 2013-01-14 | Local control device for main steam isolating valve and main feed water isolating valve of nuclear power plant |
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| CN203272946U true CN203272946U (en) | 2013-11-06 |
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| CN 201320016688 Expired - Lifetime CN203272946U (en) | 2013-01-14 | 2013-01-14 | Local control device for main steam isolating valve and main feed water isolating valve of nuclear power plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672148A (en) * | 2013-12-12 | 2014-03-26 | 中广核工程有限公司 | Method and system for detecting main steam isolation valve of nuclear power plant |
| CN107578835A (en) * | 2017-08-31 | 2018-01-12 | 中广核工程有限公司 | A kind of monitoring system and method for nuclear power plant's protection system at regular intervals test |
| CN111006056A (en) * | 2019-12-27 | 2020-04-14 | 新奥数能科技有限公司 | Monitoring method and device of steam valve and electronic equipment |
| CN112032401A (en) * | 2020-09-24 | 2020-12-04 | 三门核电有限公司 | Control platform and method for nuclear power main steam isolation valve actuating mechanism |
-
2013
- 2013-01-14 CN CN 201320016688 patent/CN203272946U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672148A (en) * | 2013-12-12 | 2014-03-26 | 中广核工程有限公司 | Method and system for detecting main steam isolation valve of nuclear power plant |
| CN103672148B (en) * | 2013-12-12 | 2017-10-31 | 中广核工程有限公司 | A kind of method and system for detecting main steam isolation valve of nuclear power plant |
| CN107578835A (en) * | 2017-08-31 | 2018-01-12 | 中广核工程有限公司 | A kind of monitoring system and method for nuclear power plant's protection system at regular intervals test |
| CN111006056A (en) * | 2019-12-27 | 2020-04-14 | 新奥数能科技有限公司 | Monitoring method and device of steam valve and electronic equipment |
| CN112032401A (en) * | 2020-09-24 | 2020-12-04 | 三门核电有限公司 | Control platform and method for nuclear power main steam isolation valve actuating mechanism |
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Granted publication date: 20131106 |
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