Detection system for air tightness of valve

Abstract

The invention discloses a detection system for air tightness of a valve. The system comprises a water tank, a water tank bracket, upper and lower pneumatic cylinders, a manipulator bracket, a plurality of manipulators and a manipulator transmission mechanism, wherein a water channel, a water inlet cylinder and a plurality of valve clamping fixtures are arranged in the water tank; the valve clamping fixtures are connected with the water inlet cylinder; the water tank bracket is fixedly arranged on the upper side of the water tank; the upper and lower pneumatic cylinders are arranged on the water tank bracket; the manipulator bracket is connected with piston rods of the upper and lower pneumatic cylinders; the manipulators are ranged on the manipulator bracket; each manipulator comprises a main shaft, a manipulator cylinder, a manipulator clamp and two clamping arms; the main shafts are provided with transmission gears; the manipulator cylinders are connected with the main shafts; the manipulator clamps are fixedly connected with the manipulator cylinders; the clamping arms are hinged in the manipulator clamps; one end of each clamping arm is hinged to the piston rod of the manipulator cylinder through a connecting arm respectively; the manipulator transmission mechanism comprises a transmission cylinder and a rack which is fixedly connected to the transmission cylinder; each transmission gear is engaged with the rack. The system can realize that the opening angle of a to-be-tested valve at each station is consistent to guarantee consistent testing condition of each to-be-tested valve and further achieve a more accurate test result.

Description

technical field [0001] The invention mainly relates to the field of valve air tightness detection, in particular to the technical field of valve air tightness detection system. Background technique [0002] The sealing performance of the valve is a very important function of the quality of the valve. Almost all valve product standards regard the air tightness of the valve as a very important inspection and control item. When testing the airtightness of the valve, it includes shell test, upper seal test and sealing test. Among them, the method and steps of the shell test are: close both ends of the flow channel of the valve to be tested, press the packing gland, make the valve to be tested partially open and put it into water, inflate the valve body to be tested and gradually pressurize it After reaching the test pressure and reaching the specified time, check whether there is any penetration in the shell. The existing testing machine for valve shell test includes a water t...

AI Technical Summary

Problems solved by technology

When the shell test of the valves to be tested is carried out, it is necessary to manually clamp the valve stems with tools one by one to open the valves to be tested. The test conditions are consistent, and the test results are easily affected

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