CN205693351U - A kind of Nuclear Power Station safe level lightning protection device - Google Patents
A kind of Nuclear Power Station safe level lightning protection device Download PDFInfo
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- CN205693351U CN205693351U CN201620532817.8U CN201620532817U CN205693351U CN 205693351 U CN205693351 U CN 205693351U CN 201620532817 U CN201620532817 U CN 201620532817U CN 205693351 U CN205693351 U CN 205693351U
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Abstract
A kind of Nuclear Power Station safe level lightning protection device provided by the utility model, lightning protection device is series in the loop that chimney effusion meter is connected with safe level analog signal preprocessor cabinet；Described lightning protection device includes that Surge Protector and the critesistor being sequentially connected electrically, described Surge Protector input are connected with described chimney effusion meter, and outfan is connected with described safe level analog signal preprocessor cabinet.By upper, lightning protection device realizes surge protection, thus due to the produced surge of thunderbolt and instantaneous overvoltage, the overcurrent on circuit of releasing on limiting circuitry, thus avoid the rack plate caused because of Thunderstorm Weather to damage, it is ensured that unit safety operation.
Description
Technical field
This utility model relates to nuclear power station technical field of security and protection, particularly to a kind of Nuclear Power Station safe level lightning protection device.
Background technology
In general industry system, if communication cable leads to outdoor, as PLC, DCS etc. control loop.Outdoor generation
Direct lightning strike or induced lightening form surge strongly the most in the loop, rush in indoor.Such as major part signal circuit position
In indoor, such as computer network.The surge occurred on network line being invaded mainly due to static discharge or electromagnetic wave and then making
Becoming, the electromagnetic wave of high frequency, its penetration capacity is the strongest.These order circuits are protected to the mainly tandem type used
Signal Surge Protector.
The DVN001/002MD chimney effusion meter of Nuclear Power Station auxiliary plant ventilating system is used for measuring Factory Building and enters air
Exhausted air quantity.This effusion meter uses pitot tube measuring principle to measure stroke between dynamic pressure and the static pressure in downstream of block body upstream
Pressure reduction, be converted into the current signal of 4-20mA by transmitter, be resent to master control monitor and show, thus reach survey
The purpose of amount flow.DVN001/002MD chimney flow is calculated as two unit shared devices, send the safe level of two units respectively
Analogue signal pretreatment (KCS) rack, is used for monitoring and reporting to the police.Owing to DVN001/002MD installation position sets high, outdoor measurement electricity
Cable length is long, and cabling parallel with down conductor system, is easily subject to thunderbolt impact；Thunderbolt will cause signal cable to produce sensing
Electric current, makes other signals small-signals such as (particularly) millivolts of the KCS rack of access produce interference, thus burns out insurance and trigger
Relative alarm.
Utility model content
In view of this, main purpose of the present utility model is, it is provided that a kind of Nuclear Power Station safe level lightning protection device, lightning protection
Device is series in the loop that chimney effusion meter is connected with safe level analog signal preprocessor cabinet；
Described lightning protection device includes Surge Protector and the critesistor being sequentially connected electrically, described Surge Protector input
Being connected with described chimney effusion meter, outfan is connected with described safe level analog signal preprocessor cabinet.
By upper, lightning protection device realizes surge protection, thus due to the produced surge of thunderbolt and instantaneous mistake on limiting circuitry
Voltage, the overcurrent on circuit of releasing, thus avoid the rack plate caused because of Thunderstorm Weather to damage, it is ensured that unit safety is transported
OK.
Optionally, the screen layer multipoint earthing of the cable that described chimney effusion meter is connected with the input of lightning protection device.
By upper, it is possible to prevent Lightning Electromagnetic Pulse from inducing transient overvoltage ripple on signal.
Optionally, the shielding of the cable that described lightning protection device outfan is connected with safe level analog signal preprocessor cabinet
Layer is in described safe level analog signal preprocessor cabinet side single-point grounding.
By upper, it is possible to prevent cable signal line or screen layer by strong electromagnetic, raise rack earth potential or directly burn
Fastener insurance or damage equipment.
Optionally, described lightning protection device also includes binding post, is used for the input of Surge Protector, outfan with described
Cable carries out interface conversion.
Optionally, described lightning protection device includes that housing, hull outside both sides are provided with cable seal sleeve pipe；
Enclosure interior is provided with a guide rail, and described Surge Protector and critesistor within lightning protection device are both secured to described
On guide rail.
Optionally, described guide rail is fixed on inside lightning protection device by fixture, and described fixture uses screw to be fixed on
Inside lightning protection device.
Optionally, described housing be degree of protection be the housing of IP41, collision protection grade meets IK07.
By upper, meet simultaneously and prevent the solid foreign object more than 1.0mm from invading, and prevent water droplet from invading.
Accompanying drawing explanation
Fig. 1 is the application example figure of Nuclear Power Station safe level lightning protection device；
Fig. 2 (A) is the external structure schematic diagram of lightning protection device；
Fig. 2 (B) is the internal structure schematic diagram of lightning protection device.
Detailed description of the invention
For the defect overcoming prior art to exist, this utility model provides a kind of Nuclear Power Station safe level lightning protection device,
The chimney effusion meter (DVN001/002MD) of Nuclear Power Station auxiliary plant ventilating system and safe level analogue signal pretreatment (KCS)
Lightning protection device is set between rack, to realize surge protection, thus due to the produced surge of thunderbolt and instantaneous on limiting circuitry
Overvoltage, the overcurrent on circuit of releasing, thus avoid the rack plate caused because of Thunderstorm Weather to damage, it is ensured that unit safety is transported
OK.
Being illustrated in figure 1 the application example figure of used in nuclear power station nuclear safe level lightning protection device, described lightning protection device is connected in series
In signal circuit between chimney effusion meter and safe level analog signal preprocessor cabinet.
Described lightning protection device includes Surge Protector and the critesistor being sequentially connected with, and described Surge Protector passes through wiring
Terminal connects external cable.
Described Surge Protector is for protecting the surge of indirect thunder and lightning and direct effects of lightning or other instantaneous overvoltages
Protect.In the present embodiment, the running voltage of DVN001/002MD chimney effusion meter is 24V, therefore the nominal operation electricity of lightning protection device
Pressure (UN) is 24V.Concrete, optional grace spy's series Surge Protector, the running voltage of this series lightning protection device is 24V,
Big Uc (UC) is 28V, and voltage protection level (UP) is 36V.According to industry standard, voltage protection level should be less than
Impact resistance voltage rating by protection equipment.Selected pressure 36V meets by protective current input card impact resistance voltagerating
Value requirement.
The operating current of DVN001/002MD chimney effusion meter is 4～20mA, therefore selects the nominal of Surge Protector to bear
Carrying electric current (IN) is 4～20mA.Response time is 5ns, and described response time refers to start to act on surge from transient overvoltage
The time delay that the time of protector is actually turned between discharging time to Surge Protector.
Critesistor is used for preventing front end Surge Protector short circuit, causes system power supply to damage.Described critesistor is placed in
The outfan of Surge Protector.Described critesistor is the positive temperature coefficient PTC temperature-sensitive electricity for overcurrent protection and short-circuit protection
Resistance.
When not being struck by lightning, lightning protection device presents less impedance (less than 65 ohm) in this loop, to DVN001/
The not impact of the load driving force (about 600 Europe) of 002MD chimney effusion meter.When there being sensing mine transmitting device DVN001/002MD
During chimney flow meter signal transmission line, the response speed with nanosecond is made holding wire pair by the Surge Protector of lightning protection device front end
Lightning current, in low impedance state, is released rapidly to greatly by ground, and the overvoltage caused by thunder and lightning is limited in safe level simulation
Within Signal Pretreatment full cabinet pressure scope allowed to bear, to guarantee the safety of safe level analog signal preprocessor cabinet
Run.The critesistor of lightning protection device outfan, it is possible to prevent thunderbolt from causing Surge Protector instantaneous short circuit.
Wherein, the cable shield being connected with the input of lightning protection device at described DVN001/002MD chimney effusion meter
Multipoint earthing, it is possible to prevent Lightning Electromagnetic Pulse from inducing transient overvoltage ripple on signal.Lightning protection device outfan arrives
The cable shield of safe level analog signal preprocessor cabinet in the single-point grounding of rack side, it is possible to prevent cable signal line or
Screen layer, by strong electromagnetic, is raised rack earth potential or directly burns fastener insurance or damage equipment.
Fig. 2 (A) and Fig. 2 (B) is respectively the outside of lightning protection device, internal structure schematic diagram.Lightning protection device shell is rectangular
Body, lightning protection device shell integral protection grade meets IP41 requirement, and collision protection grade meets IK07.Meet the most simultaneously and prevent greatly
Solid foreign object in 1.0mm invades, and prevents water droplet from invading.The physical dimension of lightning protection device is: 200mm × 160mm ×
100mm (length × width × height).Lightning protection device shell both sides are provided with cable seal sleeve pipe 21.Cable is via described cable seal
Sleeve pipe 21 enters lightning protection device, after carrying out interface conversion by binding post 23, is connected to Surge Protector 24.Corresponding, wave
After the outfan of surge protector 24 is carried out interface conversion by binding post 23, exported to safe level mould by cable seal sleeve pipe 21
Intend Signal Pretreatment rack.
A guide rail 22 it is provided with, the binding post 23 within lightning protection device, Surge Protector 24 inside described lightning protection device
It is both secured on this guide rail 22 with critesistor 25.Described guide rail is fixed on inside lightning protection device by fixture 26, described solid
Locking member 26 uses screw to be fixed on inside lightning protection device.
After putting up lightning protection device, also need it to be carried out characterization test, including following four-stage: the stage 1: key property
Test and reference test；Stage 2: the test under extreme operating condition；Stage 3: the time dependent test of valuator device performance；
Stage 4: the stress test that accident conditions causes.
Basic performance tests: before submitting qualification test to, lightning protection device is carried out major function and performance test.Outside including
Shell degree of protection is tested, the protection test of shell mechanical collision to external world, and maximum continuous operating voltage (UC) is tested, rated current
Test, series resistance test, impedance influences test, current-responsive time test, electric current test recovery time, duty is surveyed
Examination, exchanges resistance test, impacts resistance test, and impact test resetting time, impact limits voltage test.
Reference test: in the reference test stage, carries out Integrated Checkout to the basic function of each lightning protection device, to confirm
It is normal that qualification test formally starts front lightning protection device basic function, and as tests such as later environmental test, antiseismic tests after
Check the benchmark of lightning protection device basic function the most comprehensively.Including visual inspection and mechanical verification, the electricity of mechanical earthing
Gas continuity check, insulation resistance test and impact limit voltage test.
Before carrying out basic performance tests and reference test, all lightning protection devices should be ordinary atmospheric conditions (tolerant poor)
Lower placement 24h.
Test under extreme operating condition includes hot test, low-temperature test, and temperature changes test soon, and Alternate hot and humid tries
Test.
The time dependent test of valuator device performance includes steady-state damp heat test, long-run test and mechanical vibration examination
Test.
The stress test that accident conditions causes includes antiseismic test.
After all qualification test completes, work out certified test report.In qualification test shock test report should include with
Lower content:
(1) type of tested device, characterisitic parameter and affiliated producer；Selection and the model simplification situation of tested device and depend on
According to.
(2) installation of tested device, fixed form, service condition, environmental condition, the boundary condition of tested device, as defeated
Enter, export connector, install and fix, and compare with practical situation.
(3) title of vibration table, key property and affiliated unit and to Data acquisition and issuance system, test instrumentation and
The description of TCH test channel number, also includes the description demarcating date and other laboratory condition of instrument.
(4) tested device is used test response spectrum (TRS) and the response spectrum (RRS) required, and envelope situation.
(5) purpose, requirement and the content tested.The method and steps of test.
(6) testing result before test, including the measurement result of each benchmark data, and checks tested setting according to test program
Standby control device, the functional characteristic of fixing device and driving means is the most normal；The selection of measuring point and layout, point layout figure
And explanation.
(7) result of the test.Including herein below: the result of dynamic characteristic exploratory test and test data analyzer result；
Each subfunction result of the test of tested device, and the checking of equipment performability.Including before test, after process of the test neutralization test
Function situation (normal or lost efficacy) and the measurement result of each parameter, such as stress, strain, acceleration, voltage and current etc..Including
Any adjustment carried out during measured data, photo and test, the record even changed and accident analysis.Note: to failing
Reaching to be satisfied with the device of result of the test when needing modify or change, the whole test of equipment must repeated for.If examination
Test some parts of middle replacing, then the burin-in process that they first must carry out necessity by pertinent regulations could load and carries out antidetonation examination
Test；The record of the visual inspection result in process of the test and other abnormal conditions observed and explanation；Further to equipment
The suggestion improved；With the comparison of Calculation results (if likely time)；Conclusion；Test director, test unit, test day
Phase.
After lightning protection device K3 class qualification test completes, by the establishing criteria of lightning protection device qualification test and specification, mirror
Determine test program, evaluation test procedure, testing equipment and test equipment, the project of each qualification test and condition, pilot project
The explanation that carries out such as test request, the result of every test and analysis, it can be deduced that to draw a conclusion:
(1) lightning protection device has passed through core level qualification test, and this is mainly manifested in: the experimental condition of every qualification test and side
Method meets the requirement of regulation in lightning protection device evaluation test program.
All to each lightning protection device basic function and the test result of technical characteristic, each before qualification tests and after terminating
Before qualification test, afterwards with process of the test in each lightning protection device basic function and the test result of technical characteristic, symbol
Close the requirement of acceptance criteria in corresponding evaluation test procedure and evaluation test program, also comply with in lightning protection device specifications and specify
Requirement.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model.In a word, all
Within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, should be included in this practicality
Within novel protection domain.
Claims (7)
1. a Nuclear Power Station safe level lightning protection device, it is characterised in that
Lightning protection device is series in the loop that chimney effusion meter is connected with safe level analog signal preprocessor cabinet；
Described lightning protection device includes Surge Protector and the critesistor being sequentially connected electrically, and the input of described Surge Protector is made
For the input of lightning protection device, it is connected with described chimney effusion meter；Described critesistor is as the outfan of lightning protection device, with institute
State safe level analog signal preprocessor cabinet to connect.
Device the most according to claim 1, it is characterised in that described chimney effusion meter and the input of described lightning protection device
Cable connects, the screen layer multipoint earthing of described cable.
Device the most according to claim 1, it is characterised in that described lightning protection device outfan is pre-with safe level analogue signal
Processing rack cable to connect, the screen layer of described cable is in described safe level analog signal preprocessor cabinet side single-point grounding.
4. according to the device described in Claims 2 or 3, described lightning protection device also includes binding post, for described lightning protection being filled
Input, the outfan put carry out interface conversion with described cable.
Device the most according to claim 1, it is characterised in that described lightning protection device includes that housing, hull outside both sides set
It is equipped with cable seal sleeve pipe；
Enclosure interior is provided with a guide rail, and described Surge Protector and critesistor within lightning protection device are both secured to described guide rail
On.
Device the most according to claim 5, it is characterised in that described guide rail is fixed in lightning protection device by fixture
Portion, described fixture is screwed inside lightning protection device.
Device the most according to claim 5, it is characterised in that described housing be degree of protection be IP41, collision protection etc.
Level is the housing of IK07.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620532817.8U CN205693351U (en) | 2016-06-02 | 2016-06-02 | A kind of Nuclear Power Station safe level lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620532817.8U CN205693351U (en) | 2016-06-02 | 2016-06-02 | A kind of Nuclear Power Station safe level lightning protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205693351U true CN205693351U (en) | 2016-11-16 |
Family
ID=57259803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620532817.8U Active CN205693351U (en) | 2016-06-02 | 2016-06-02 | A kind of Nuclear Power Station safe level lightning protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205693351U (en) |
-
2016
- 2016-06-02 CN CN201620532817.8U patent/CN205693351U/en active Active
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