Test method, system and device for No. 3 seal filter of main pump

Abstract

The invention discloses a test method, system and device for the No. 3 sealing filter of the main pump. The method includes: S1. Connect the quantitative adjustment pump, the pressure gauge, the filter, the No. 3 sealing filter to be tested and the waste water collection device in sequence, and adjust the pressure gauge A pressure reducing valve is set on the top, so that the initial working pressure is the first preset pressure value; S2. Inject the pump liquid into the quantitative adjustment pump, and perform water injection and pressure, so that the pump liquid passes through the pressure gauge, filter, and the third seal in sequence. After the filter, it is discharged into the waste water collection device; S3. Judging whether the pressure gauge shows the number and does not exceed a second preset pressure value, and at the same time there is continuous liquid flow out of the outlet of the No. 3 sealing filter, if so, pass the test; if not , it fails. In the test method, system and device of the No. 3 sealing filter of the main pump of the present invention, the No. 3 sealing filter is filled with water through the quantitative adjustment pump, the pressure of the injected water is observed through the pressure gauge, and the pressure of the injected water can be adjusted through the pressure reducing valve, so as to improve maintenance equipment. reliability.

Description

technical field [0001] The invention relates to the field of rotating machinery, in particular to a method, system and device for testing the No. 3 sealing filter of a main pump. Background technique [0002] The reactor coolant system (RCP) is the primary loop system of a nuclear power plant. The CPR1000 (China's million-kilowatt pressurized water reactor nuclear power plant) nuclear power unit has three loops, and each loop is equipped with a reactor coolant pump (main pump) , which is used to drive the coolant to circulate in the primary circuit system, and continuously transfer the heat generated in the core to the secondary side feedwater of the steam generator. The main pump ensures proper flow of coolant through the core to keep the reactor core cool and prevent film boiling. [0003] The main pump is a vertical, single-stage centrifugal pump with a controlled leakage shaft seal. The mechanical seal of the main pump is the most fragile and sensitive part among all c...

AI Technical Summary

Problems solved by technology

[0006] The main components of the No. 3 sealing filter of the main pump include the check valve and the filter element. After the installation of the No. 3 sealing filter element and the check valve of the main pump for a long time, the on-site verification can only verify the patency in a relatively simple way, but it cannot effectively verify the injected water. The continuity of the No. 3 injection filter has occurred in many nuclear power bases, and the risk of this verification method is relatively high (the pressure cannot be controlled, and the risk of personnel contamination is high)

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