Device and method for calibrating liquid level switch of water storage tank in nuclear power plant
A technology of liquid level switch and calibration method, applied in testing/calibration device, measuring device, liquid/fluid solid measurement, etc., can solve the problems of increasing test water, increasing test cost, and high test cost, and reducing human error , Improve the efficiency of verification work
Active Publication Date: 2021-10-15
中广核工程有限公司 +2
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0021] However, the above liquid level switch fixed value verification method has the problems of low verification accuracy, unreliable test results, high risk in the verification process, and high test cost:
[0022] 1) For the first time, the calibration and adjustment of the liquid level switch is realized by filling and draining the liquid level column 001CN. The calibration and adjustment process of the liquid level switch uses the temporary liquid level gauge as a reference, because the temporary liquid level gauge has the problem of low measurement accuracy , so the existing verification method has the problem of low accuracy of verification results;
[0023] 2) The liquid level column 001CN was filled and drained many times on site to adjust and verify the liquid level switch. Because the opening of the valves 803VD and 807VD were manually controlled during the water filling and draining process, the filling and draining rate during each verification process are different, resulting in a deviation between the test results and the trigger verification value of the liquid level switch during the filling and draining of the water storage tank ASG001BA, which ultimately makes the test results unreliable;
[0024] 3) During the filling and draining of the liquid level column 001CN for many times, because the water filling rate cannot be effectively controlled, the connecting rod of the liquid level switch often bends due to the excessive water filling rate; at the same time, because the early test results are not reliable, the subsequent The number of adjustments of the liquid level switch during the filling and draining of the water storage tank ASG001BA increases the risk of nitrogen suffocation and high-altitude fall;
[0025] 4) Due to the rough verification of the liquid level switch with a temporary liquid level gauge in the early stage, it is necessary to fill and drain the water storage tank ASG001BA several times in the later stage to verify and adjust the liquid level switch, increase the test water by about 2000 cubic meters, and increase the verification period About 6 days, increasing the test cost
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0054] In order to make the purpose, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.
[0055] For the convenience of explanation, the relevant structure of the water storage tank of the nuclear power plant is firstly introduced.
[0056] see figure 2 , the nuclear power plant water storage tank ASG001BA is equipped with liquid level column 001CN and multiple liquid level monitoring meters 001MN, 002MN, 011MN, 002LN, multiple liquid level switches 001SN, 002SN, 003SN, 004SN, 007SN, 008SN, 010SN to be verified Set on the liquid level column 001CN. A valve 805VZ is provided on the pipeline connecting the top of the liquid level colu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a verification device and method for a liquid level switch of a water storage tank in a nuclear power plant. A storage container is provided for the filling and draining of the column; the metering pump is set on the outlet pipeline of the temporary water storage tank to fill the liquid level column; the temporary liquid level gauge is set in parallel with the liquid level column, and the bottom is the same as the bottom of the liquid level column The connection is used to monitor the liquid level in the liquid level column; the data acquisition and processing device is used to collect the signals of the plurality of liquid level switches and liquid level monitoring meters in real time, and process, display and store the signals. Compared with the prior art, the present invention solves the problems of low verification accuracy, unreliable verification results, high verification risk and high cost in the original verification method, and improves the work efficiency of the liquid level switch verification of the water storage tank. Human error is reduced, and the risk of affecting the safe operation of the unit due to multiple checks of the liquid level switch is also reduced.
Description
technical field [0001] The invention belongs to the field of debugging of nuclear power plants, and more specifically, the invention relates to a verification device and method for a liquid level switch of a water storage tank of a nuclear power plant. Background technique [0002] The auxiliary water supply system (ASG) is used as the evaporator water supply backup system to provide water to the secondary side of the evaporator when the main water supply is lost. When the reactor is started and the temperature of the reactor coolant system is raised, the nuclear power unit is thermally shut down, and the reactor is cooled until the residual heat removal system (RRA) is put into operation, it replaces the operation of the main water supply system (ARE) and the start-up water system (APD); the auxiliary water supply system belongs to the exclusive Safety facilities are set up. When any normal water supply system (APA, APD, ARE) fails, the auxiliary water supply system operate...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityPatents(China)
IPC IPC(8): G01F25/00
CPCG01F25/20
Inventor周亮亮范博仁王志明王江洪王洪林
Owner中广核工程有限公司