Portable modularized check valve pressing device

Abstract

The invention discloses a portable modularized check valve pressing device which comprises a water pump and water tank module, a hydraulic drive pressurization module, an exhaust / drainage module, an electrical control module, a valve and instrument module, a water pumping module and an upper computer. The water pump and water tank module is connected with the valve and instrument module, the hydraulic drive pressurization module is connected with the valve and instrument module, the valve and instrument module is connected with the exhaust / drainage module, and the exhaust / drainage module is connected with a check valve through a check valve test valve cover pressing special interface. The electrical control module is connected with the water pump and water tank module, the hydraulic drive pressurization module, the exhaust / drainage module, the valve and instrument module, the water pumping module and the upper computer through cables, and the upper computer is connected with the electrical control module through the Ethernet or WIFI. The check valve has the beneficial effects that a pressurized medium is injected into the valve cavity, the pressure drop and the leakage rate of the check valve within the specified time are quantitatively detected, the maintenance quality of the check valve is ensured, and the operation safety and economic indexes of a nuclear power plant unit are ensured.

Description

technical field [0001] The invention belongs to the technical field of check valve sealing test detection and maintenance, and in particular relates to a portable modular check valve pressing device. Background technique [0002] The check valve is an automatic valve that automatically opens and closes the valve flap by relying on the flow of the medium itself, and is used to prevent the backflow of the medium. Check valves are usually used as boundary isolation valves for important systems in nuclear power plants. During reactor operation or during cold shutdown, the failure of any one check valve will have a significant impact on the safety of the power plant. [0003] Elimination of check valve leakage is a key concern in the operation and maintenance of nuclear power plants. Restricted by technical conditions and considering factors of high risk of on-site work, most domestic nuclear power plants basically use valve disintegration and grinding + blue oil test during over...

AI Technical Summary

Problems solved by technology

[0005] A few nuclear power plants in China have developed a device for checking the tightness of the check valve in the early stage, but due to the poor reliability of the check valve sealing device, there is a risk of being washed away by the pressure and entering the pressure vessel or other equipment systems ;At the same time, the suppression device has a low degree of intelligence and adopts an integrated centralized cabinet design, which is large in size and heavy in weight, making it inconvenient to transport and carry, and has been abandoned by various power plants

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