CN109659846A - A kind of conventional island float type liquid level switch high temperature resistant upgrade method - Google Patents
A kind of conventional island float type liquid level switch high temperature resistant upgrade method Download PDFInfo
- Publication number
- CN109659846A CN109659846A CN201811391525.7A CN201811391525A CN109659846A CN 109659846 A CN109659846 A CN 109659846A CN 201811391525 A CN201811391525 A CN 201811391525A CN 109659846 A CN109659846 A CN 109659846A
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- China
- Prior art keywords
- high temperature
- level switch
- liquid
- resistant
- cable
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The present invention relates to a kind of conventional island float type liquid levels to switch high temperature resistant upgrade method, comprising the following steps: Step 1: opening the end cap of liquid-level switch, removes two original cables being connected on liquid-level switch；The other end of two original cables still attaches on DCS cabinet, remains stationary；Step 2: installing junction box near liquid-level switch；Step 3: being connected on junction box after one end of remove from liquid-level switch two original cables is carried out wire stripping, crimping；Step 4: one end is connected to liquid-level switch after the both ends of two high temperature-resistant cables are carried out wire stripping, crimping respectively, the other end is connected on junction box；High temperature-resistant cable is attached by junction box and original cable；Step 5: being tested, confirmation liquid-level switch and the communication of DCS rack room are normal.After in November, 2015 executes this technology upgrading to 78 conventional island float type liquid level switches of certain unit, liquid-level switch stable operation, cable in order, does not occur aging disrepair phenomenon.
Description
Technical field
The invention belongs to nuclear power station service technique fields, and in particular to a kind of conventional island float type liquid level switch high temperature resistant liter
Grade method.
Background technique
Conventional island float type liquid level switch is generally used for monitoring conventional island hydrophobic pocket liquid level, if hydrophobic pocket liquid level is excessively high, then
Downstream drain valve is opened by logical interlock, hydrophobic pocket is carried out hydrophobic.
On September 18th, 2014 finds that heat-extraction system is hydrophobic by No. 1 conventional island steam during certain unit first time light maintenance
Bag liquid-level switch external cabling because of high-temperature embrittlement, found after then generally investigating VVP, GCT system, GCT121SN,
GCT122SN, VVP215SN cable have existed breakage.
By verifying, the former cable core insulating layer operating temperature of discovery is 90 DEG C, and live liquid-level switch internal work temperature
Up to 200 DEG C or so of degree, so as to cause liquid-level switch cable embrittlement rupture.Core is shorted after cable embrittlement rupture, under interlocking
Drain valve abnormal start-up is swum, causes unit thermal power to fluctuate, influences stable operation of unit.
Certain unit uses this liquid-level switch high temperature resistant upgrade method for the first time, and by the practical proof of live many years, really
This technology is protected effectively to apply in a high temperauture environment.And extend to other units and power plant of going together, fill up float type liquid level
Switch the blank of high temperature resistant upgrade method.This technology reduces cost of equipment maintenance, reduces unit operation risk, ensures machine
Group stable operation.
Summary of the invention
It is an object of the invention to: a kind of high temperature resistant upgrade method of conventional island float type liquid level switch is provided, it can
Enough stable operation under high temperature environment.
Technical scheme is as follows: a kind of conventional island float type liquid level switch high temperature resistant upgrade method, including following
Step:
Step 1: opening the end cap of liquid-level switch, two original cables being connected on liquid-level switch are removed；Described two
The other end of the original cable of root still attaches on DCS cabinet, remains stationary；
Step 2: installing junction box near liquid-level switch；
Step 3: being connected to and connecing after one end of remove from liquid-level switch two original cables is carried out wire stripping, crimping
On line case；
Step 4: one end is connected to liquid-level switch after the both ends of two high temperature-resistant cables are carried out wire stripping, crimping respectively,
The other end is connected on junction box；High temperature-resistant cable is attached by junction box and original cable；
Step 5: being tested, after confirmation liquid-level switch and the communication normally of DCS rack room, the end cap of liquid-level switch is installed,
Site clearing.
Further, in step 2, the junction box between liquid-level switch at a distance from be 5-8 meters.
Further, in step 3, the model HKJ2C1S/B3-K3 of original cable.
Further, in step 4, it is 200 degrees Celsius or more that the high temperature-resistant cable, which requires the operating temperature allowed,.
Further, in step 4, the model WDZBN-KFYPx-3*1.0 of the high temperature-resistant cable, the work of permission
Making temperature is 260 degree.
Further, the WDZBN-KFYPx-3*1.0 high temperature-resistant cable is tin plating twisted copper core conductor, fluoroplastics
Insulation, tinned copper wire braid shielded, low-smoke and halogen-free flame retardant polyolefin jacket, B class flame-retardant fire-resistant control cable.
Further, in step 4, model WDZB-KFEP 2*1.0, the WDZBN- of the high temperature-resistant cable
KFYPx-3*1.0 or ZBN-KF46EP1 450/750V 2*1.0B, permitted operating temperature are 260 degree.
Remarkable result of the invention is: in November, 2015 executes 78 conventional island float type liquid level switches of certain unit should
After item technology upgrading, liquid-level switch stable operation.So far pass through 3 overhauls, cable in order, it is existing not occur aging breakage
As.
Detailed description of the invention
Fig. 1 is the wiring schematic diagram that a kind of conventional island float type liquid level of the present invention switchs high temperature resistant upgrade method；
In figure: 1. liquid-level switches, 2. high temperature-resistant cables, 3. junction boxes, 4. original cables, 5.DCS cabinet.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is to a kind of conventional island float type liquid level switch high temperature resistant of the present invention
Upgrade method is described in further detail.
As shown in Figure 1, a kind of conventional island float type liquid level switchs high temperature resistant upgrade method, comprising the following steps:
Step 1: opening the end cap of liquid-level switch 1, two original cables 4 being connected on liquid-level switch 1 are removed；It is described
The other ends of two original cables 4 still attach on DCS cabinet 5, remain stationary；
Step 2: installing junction box 3 near liquid-level switch 1；
Step 3: being connected to after one end of two removed from liquid-level switch 1 original cables 4 is carried out wire stripping, crimping
On junction box 3；
Step 4: one end is connected to liquid-level switch after the both ends of two high temperature-resistant cables 2 are carried out wire stripping, crimping respectively
1, the other end is connected on junction box 3；High temperature-resistant cable 2 is attached by junction box 3 with original cable 4；
Step 5: being tested, confirm after being communicated normally between liquid-level switch 1 and DCS cabinet 5, the end of liquid-level switch 1 is installed
Lid, site clearing.
Further, in step 2, the junction box 3 between liquid-level switch 1 at a distance from be 5-8 meters.
Further, in step 3, the model HKJ2C1S/B3-K3 of original cable 4.
Further, in step 4, it is 200 degrees Celsius or more that the high temperature-resistant cable 2, which requires the operating temperature allowed,.
Further, in step 4, the model WDZBN-KFYPx-3*1.0 of the high temperature-resistant cable 2, the work of permission
Making temperature is 260 degree.
Further, the WDZBN-KFYPx-3*1.0 high temperature-resistant cable 2 is tin plating twisted copper core conductor, fluoroplastics
Insulation, tinned copper wire braid shielded, low-smoke and halogen-free flame retardant polyolefin jacket, B class flame-retardant fire-resistant control cable.
Further, in step 4, model WDZB-KFEP 2*1.0, the WDZBN- of the high temperature-resistant cable 2
KFYPx-3*1.0 or ZBN-KF46EP1 450/750V 2*1.0B, permitted operating temperature are 260 degree.
Claims (7)
1. a kind of conventional island float type liquid level switchs high temperature resistant upgrade method, which comprises the following steps:
Step 1: opening the end cap of liquid-level switch (1), two original cables (4) being connected on liquid-level switch (1) are removed；Institute
The other end of the original cable (4) of two stated still attaches on DCS cabinet (5), remains stationary；
Step 2: nearby installing junction box (3) in liquid-level switch (1)；
Step 3: being connected to after the one end for the two original cables (4) that will be removed from liquid-level switch (1) carries out wire stripping, crimping
On junction box (3)；
Step 4: one end is connected to liquid-level switch after the both ends of two high temperature-resistant cables (2) are carried out wire stripping, crimping respectively
(1), the other end is connected on junction box (3)；High temperature-resistant cable (2) is attached by junction box (3) with original cable (4)；
Step 5: being tested, confirm after being communicated normally between liquid-level switch (1) and DCS cabinet (5), installation liquid-level switch (1)
End cap, site clearing.
2. a kind of conventional island float type liquid level as described in claim 1 switchs high temperature resistant upgrade method, it is characterised in that: step
In two, the junction box (3) between liquid-level switch (1) at a distance from be 5-8 meters.
3. a kind of conventional island float type liquid level as described in claim 1 switchs high temperature resistant upgrade method, it is characterised in that: step
In three, the model HKJ2C1S/B3-K3 of original cable (4).
4. a kind of conventional island float type liquid level as described in claim 1 switchs high temperature resistant upgrade method, it is characterised in that: step
In four, it is 200 degrees Celsius or more that the high temperature-resistant cable (2), which requires the operating temperature allowed,.
5. a kind of conventional island float type liquid level as described in claim 1 switchs high temperature resistant upgrade method, it is characterised in that: step
In four, the model WDZBN-KFYPx-3*1.0 of the high temperature-resistant cable (2), the operating temperature of permission is 260 degree.
6. a kind of conventional island float type liquid level as claimed in claim 5 switchs high temperature resistant upgrade method, it is characterised in that: described
WDZBN-KFYPx-3*1.0 high temperature-resistant cable (2), be tin plating twisted copper core conductor, fluoroplastic insulation, tinned copper wire braiding screen
It covers, low-smoke and halogen-free flame retardant polyolefin jacket, B class flame-retardant fire-resistant control cable.
7. a kind of conventional island float type liquid level as described in claim 1 switchs high temperature resistant upgrade method, it is characterised in that: step
In four, model WDZB-KFEP 2*1.0, WDZBN-KFYPx-3*1.0 or the ZBN- of the high temperature-resistant cable (2)
KF46EP1 450/750V 2*1.0 (B), permitted operating temperature are 260 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391525.7A CN109659846A (en) | 2018-11-21 | 2018-11-21 | A kind of conventional island float type liquid level switch high temperature resistant upgrade method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811391525.7A CN109659846A (en) | 2018-11-21 | 2018-11-21 | A kind of conventional island float type liquid level switch high temperature resistant upgrade method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109659846A true CN109659846A (en) | 2019-04-19 |
Family
ID=66112382
Family Applications (1)
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|---|---|---|---|
| CN201811391525.7A Pending CN109659846A (en) | 2018-11-21 | 2018-11-21 | A kind of conventional island float type liquid level switch high temperature resistant upgrade method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202168139U (en) * | 2011-08-11 | 2012-03-14 | 邓荣光 | Waterproof wiring power supply box for electric product |
| CN202183286U (en) * | 2011-07-18 | 2012-04-04 | 东南电梯股份有限公司 | Special brake resistor device for frequency converter for elevator of nuclear island |
| CN202836681U (en) * | 2012-11-03 | 2013-03-27 | 大庆锦华联电子信息科技开发有限公司 | Liquid level indictor for fracturing fluid transportation tank truck |
| CN103452672A (en) * | 2013-09-06 | 2013-12-18 | 株洲南方燃气轮机成套制造安装有限公司 | Electrical unit for gas turbine and electrical equipment wiring method of electrical unit |
| CN103915794A (en) * | 2014-04-25 | 2014-07-09 | 林旭升 | Rain-proof connecting box of power source outside monitoring room |
| CN204614493U (en) * | 2015-04-14 | 2015-09-02 | 安徽华通电缆集团有限公司 | Aircraft engine nacelle and engine high temperature fire resisting electric cable |
| KR20150129884A (en) * | 2014-05-12 | 2015-11-23 | 한국수력원자력 주식회사 | Sealing device for cable test in high-temperature and high-pressure environment |
| CN205248056U (en) * | 2015-12-28 | 2016-05-18 | 保定保菱变压器有限公司 | Store up oil tank's oil level gaugember wiring structure |
| CN205300796U (en) * | 2015-09-30 | 2016-06-08 | 大亚湾核电运营管理有限责任公司 | Supplementary water supply system's of nuclear power station temperature measuring device , supplementary feed -tank and system |
-
2018
- 2018-11-21 CN CN201811391525.7A patent/CN109659846A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202183286U (en) * | 2011-07-18 | 2012-04-04 | 东南电梯股份有限公司 | Special brake resistor device for frequency converter for elevator of nuclear island |
| CN202168139U (en) * | 2011-08-11 | 2012-03-14 | 邓荣光 | Waterproof wiring power supply box for electric product |
| CN202836681U (en) * | 2012-11-03 | 2013-03-27 | 大庆锦华联电子信息科技开发有限公司 | Liquid level indictor for fracturing fluid transportation tank truck |
| CN103452672A (en) * | 2013-09-06 | 2013-12-18 | 株洲南方燃气轮机成套制造安装有限公司 | Electrical unit for gas turbine and electrical equipment wiring method of electrical unit |
| CN103915794A (en) * | 2014-04-25 | 2014-07-09 | 林旭升 | Rain-proof connecting box of power source outside monitoring room |
| KR20150129884A (en) * | 2014-05-12 | 2015-11-23 | 한국수력원자력 주식회사 | Sealing device for cable test in high-temperature and high-pressure environment |
| CN204614493U (en) * | 2015-04-14 | 2015-09-02 | 安徽华通电缆集团有限公司 | Aircraft engine nacelle and engine high temperature fire resisting electric cable |
| CN205300796U (en) * | 2015-09-30 | 2016-06-08 | 大亚湾核电运营管理有限责任公司 | Supplementary water supply system's of nuclear power station temperature measuring device , supplementary feed -tank and system |
| CN205248056U (en) * | 2015-12-28 | 2016-05-18 | 保定保菱变压器有限公司 | Store up oil tank's oil level gaugember wiring structure |
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Application publication date: 20190419 |
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| RJ01 | Rejection of invention patent application after publication |