Pressure release valve detection equipment and detection method

Abstract

The invention discloses pressure release valve detection equipment and a pressure release valve detection method. The pressure release valve detection equipment comprises a nitrogen source, the nitrogen source is connected with at least one branch, and a first electromagnetic valve, a pressure sensor and a to-be-detected pressure release valve are sequentially arranged on each branch from front toback; a nitrogen exhaust branch is further arranged at the position, located at the rear end of the first electromagnetic valve, of the branch, and a second electromagnetic valve is arranged on the nitrogen exhaust branch; and a solution tank is arranged below the to-be-detected pressure release valve. After nitrogen is introduced, the opening pressure and the closing pressure of the to-be-detected pressure release valve are detected through the pressure sensor, then nitrogen is discharged through the second electromagnetic valve on the nitrogen discharging branch, nitrogen is introduced again, and the air tightness of the to-be-detected pressure release valve is roughly detected through the pressure sensor; and then the airtightness of the to-be-detected pressure release valve is continuously detected through the solution tank, and the pressure release valve opening pressure detection, the pressure release valve closing pressure detection and the airtightness detection are divided into two steps, so that the precision requirement of the pressure sensor is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of workpiece detection, in particular to a pressure relief valve detection device and detection method. Background technique [0002] Due to environmental protection requirements, the current passenger car air-conditioning system needs to use new working fluids (such as R407C, R410A). The high-pressure pressure of the new working fluids may reach about 4MPa. Therefore, the detection of pressure relief valves in the production process is particularly important. [0003] At present, there are two main methods of detection devices for pressure relief valves in the production process: [0004] ①Pressure test water tank, this method has high operating intensity, low production efficiency, poor safety and large measurement error; [0005] ② Helium gas leak detector, this equipment is expensive, takes a long time to detect, and has low production efficiency, and it is prone to misjudgment when testing multiple pi...

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