CN-116222706-B - Verification method and device of flow measurement system

CN116222706BCN 116222706 BCN116222706 BCN 116222706BCN-116222706-B

Abstract

The invention discloses a verification method and a device of a flow measurement system, wherein the verification method comprises the following steps that a flow water delivery system delivers water to the flow measurement system according to a preset water delivery value; and comparing the preset water delivery value with the real-time measured value to obtain a comparison verification result. According to the technical scheme, the flow water delivery system directly delivers water to the flow measurement system, and in the verification process, stable water delivery flow can be quickly established to verify the flow measurement system, so that the verification period is shortened.

Inventors

Fan Jinxuan
LIU YANG
LUO HAO
LIU DONGLIANG
YUAN XIAONING
MA ZHIXIN

Assignees

中广核工程有限公司
中国广核集团有限公司
中国广核电力股份有限公司

Dates

Publication Date: 20260505
Application Date: 20230131

Claims (8)

1. A method of validating a flow measurement system, comprising the steps of: s1, a flow water delivery system delivers water to the flow measurement system according to a preset water delivery value; s2, acquiring a real-time measured value of a flowmeter in the flow measurement system; S3, comparing the preset water delivery value with the real-time measured value to obtain a comparison verification result; S4, judging whether the flow measurement system meets design requirements according to the comparison verification result, wherein the step comprises the following steps: S4-1, judging that vacuum exists in the water delivery pipeline at the rear end of the flowmeter when the comparison verification result shows that the real-time measured value is jumped, and additionally arranging a high-level vent hole at a bent pipe close to the water outlet end of the flowmeter; S4-2, when the comparison verification result is that the real-time measured value is0, judging that the small flow cutting function of the flowmeter is not closed and/or the pipeline gradient is insufficient, closing the small flow cutting function of the flowmeter and/or adjusting the pipeline gradient; and S4-3, when the comparison verification result shows that the error requirement is not met between the preset water delivery value and the real-time measured value, judging that the gradient of the pipeline is insufficient, and adjusting the gradient of the pipeline.
2. The method according to claim 1, further comprising step S4 of determining whether a flow meter range in the flow measurement system meets a requirement according to the comparison verification result.
3. The method according to claim 2, wherein in step S4, the method includes gradually adjusting the preset water delivery value, and determining that the range of the flow meter is not reasonable when the comparison verification result is that the real-time measured value in the flow meter is not changed along with the increase of the preset water delivery value when the preset water delivery value is adjusted.
4. The method according to claim 1, further comprising step S4 of determining whether the flowmeter in the flow measurement system meets a set requirement according to the comparison verification result.
5. The method according to claim 4, wherein in the step S4, the method comprises the step of adjusting the preset water delivery value to a second highest alarm threshold value of the flowmeter, and when the comparison verification result is that the water collecting tray overflows, judging that the second highest alarm threshold value of the flowmeter is unreasonable to set.
6. A verification device of a flow measurement system, applying the verification method according to any one of claims 1 to 5, characterized in that the verification device comprises a water delivery pump capable of adjusting the water delivery flow, a flow meter for displaying the water delivery flow, and a plurality of connecting pipes; The water inlet end of the water delivery pump is connected with a water source through the connecting pipe, and the water outlet end of the water delivery pump is connected with the water inlet end of the flowmeter through the connecting pipe; the water outlet end of the flowmeter is connected with the water inlet end of the flow measurement system through the connecting pipe.
7. The verification apparatus of claim 6 wherein said flow meter accuracy is greater than 2.5%.
8. The authentication apparatus of claim 6, wherein the water pump is an adjustable metering pump.

Description

Verification method and device of flow measurement system Technical Field The present invention relates to the field of flow measurement, and in particular, to a method and apparatus for verifying a flow measurement system. Background The nuclear power station has unique design characteristics in the aspect of nuclear island factory layout, different facilities are divided into different intervals, so that effective physical isolation is formed between different facilities, the facilities can be protected, the availability of the power station under fault working conditions is improved to a certain extent, and the utilization rate of a unit is improved. When the nuclear power station leaks in the operation process, leakage matters are diffused into each plant in the form of water vapor, the humidity in the plant is correspondingly increased, and wet vapor is generated. The containment cooling ventilation system in the factory building conveys wet steam to the cooling pipe in an internal circulation mode, condensate water is generated after the cooling pipe is condensed, the condensate water is collected through the water collecting disc below the cooling pipe, and the collected condensate water is discharged to the floor drain through the drainage system pipeline. In order to control the amount of leakage, the collected condensed water needs to be monitored. The technology for monitoring the condensed water in the nuclear power station mainly comprises an indirect radiation monitoring method, an acoustic monitoring method, a humidity sensor monitoring method, a temperature monitoring method, a flow monitoring method, a porous medium humidity sampling monitoring method, a deuterium concentration monitoring method, a laser sensor monitoring method, a fuzzy safety monitoring method and the like. The method for monitoring the leakage in the primary loop of the nuclear power station is a flow monitoring system designed based on the Coriolis force, the leakage is changed into condensed water, then enters a water collecting disc, and enters a flow measuring system through the water collecting disc, and because of the complex site construction environment, a flowmeter and a pipeline in the flow measuring system need to be verified before the flow monitoring system is applied. At present, in the prior art, the water delivery flow needs to enter the flow measurement system through the containment cooling ventilation system, and in the verification process, stable flow cannot be quickly established, so that the verification period is prolonged. Disclosure of Invention The invention aims to provide a verification method and a verification device for a flow measurement system. The technical scheme adopted by the invention for solving the technical problems is that a verification method of a flow measurement system is provided, which comprises the following steps: S1, a flow water delivery system delivers water to the flow measurement system according to a preset water delivery value; s2, acquiring a real-time measured value of a flowmeter in the flow measurement system; and S3, comparing the preset water delivery value with the real-time measured value to obtain a comparison verification result. Preferably, the verification method further includes step S4 of judging whether the flow measurement system meets design requirements according to the comparison verification result. Preferably, in the step S4, it includes: S4-1, judging that vacuum exists in the water delivery pipeline at the rear end of the flowmeter when the comparison verification result shows that the real-time measured value is jumped, and additionally arranging a high-level vent hole at a bent pipe close to the water outlet end of the flowmeter; S4-2, when the comparison verification result is that the real-time measured value is0, judging that the small flow cutting function of the flowmeter is not closed and/or the pipeline gradient is insufficient, closing the small flow cutting function of the flowmeter and/or adjusting the pipeline gradient; and S4-3, when the comparison verification result shows that the error requirement is not met between the preset water delivery value and the real-time measured value, judging that the gradient of the pipeline is insufficient, and adjusting the gradient of the pipeline. Preferably, the verification method further includes step S4 of judging whether the range of the flow meter in the flow measurement system meets the requirement according to the comparison verification result. Preferably, in the step S4, the step of gradually adjusting the preset water delivery value is performed, and when the comparison verification result is that the real-time measured value in the flowmeter does not change along with the increase of the preset water delivery value when the preset water delivery value is adjusted, the measuring range of the flowmeter is judged to be unreasonable. Preferably, the verification method further inclu