Test method, system and device for seal filter of main pump III

Abstract

The invention discloses a test method, system and device for a seal filter of a main pump III. The method comprising: S1, connecting a quantitative adjustment pump, a pressure gauge, a filter, a to-be-tested seal filter III, and a waste water collecting device successively, adjusting a reducing valve arranged on the pressure gauge, and enabling an initial working pressure to be a first preset pressure value; S2, injecting pump fluid into the quantitative adjustment pump, carrying water injection and pressing, and thus enabling pump liquid to flow through the pressure gauge, the filter and theseal filter III successively and then to be drained into the waste water collecting device; and S3, determining whether the pressure gauge displays a number, the number does not exceed a second presetpressure value, and liquid flows out of the outlet of the seal filter III continuously; if so, indicating successful testing; and if not, indicating a testing failure. According to the invention, water is injected into the seal filter III by the quantitative adjustment pump; and the pressure of the injected water is observed by the pressure gauge and the pressure of the injected water is reducedby a reducing valve, so that the reliability of the maintenance equipment is improved.

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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