Compound damping check valve fluid blocking test system and test method thereof

Abstract

The invention belongs to the technical field of fluid blocking tests, and particularly relates to a compound damping check valve fluid blocking test system and a test method thereof. The device comprises a first pipe explosion simulation assembly and a second pipe explosion simulation assembly, an inlet of the first pipe explosion simulation assembly is communicated with a valve body inlet of an angle type damping check valve, a valve body outlet of the angle type damping check valve is communicated with an outlet of an energy accumulator through a switching valve SV6, and an inlet of the energy accumulator is provided with a gas path branch and a liquid path branch; an inlet of the second pipe explosion simulation assembly is communicated with a valve body inlet of the straight-through type damping check valve, and a valve body outlet of the straight-through type damping check valve is communicated with an outlet of the energy accumulator through the switching valve SV7; and a pressure regulating cavity of the second pipe explosion simulation assembly is communicated with the air source through a switch valve SV2 and a regulating valve CV2 in sequence. Under the same working condition, the online test effect of the diagonal damping check valve and the straight-through damping check valve can be achieved at the same time, and the measurement and calculation accuracy of test data is higher.

Description

technical field [0001] The invention belongs to the technical field of fluid blocking test, in particular to a fluid blocking test system and a test method for a compound damping check valve. Background technique [0002] Rapid changes in mass flow in high-pressure lines can cause pressure fluctuations and pressures that exceed the allowable strength limits of the pipe material. Therefore, it is particularly important to dampen the closing behavior of the check valve after a rupture in a high-pressure pipeline. The damping check valve is equipped with a damping mechanism inside, which can customize the closing time according to the user's use requirements to keep the fluid dynamic load from the pressure wave within the limit, eliminate high-pressure transients in the water supply line, and at the same time can close as quickly as possible, to minimize water loss. At this stage, the closing performance parameters of the damping check valve need to be obtained through tests....

AI Technical Summary

Problems solved by technology

The check valve fluid blocking test methods disclosed in CN104359695B and CN109029943A all change the flow direction of the test medium to establish test conditions through the rapid opening and closing switching of water pumps and valves. Due to the limitation of valve caliber, it is impossible to truly simulate even millisecond-level pipeline rupture accident conditions, and the cost of the test system is high. Therefore, there is an urgent need for a check valve fluid blocking test method that is suitable for actual working conditions and has high economic benefits.

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