Polyethylene ball valve air tightness detection device

Abstract

The invention relates to a polyethylene ball valve air tightness detection device which comprises a detecting body connected with a driving device. The polyethylene ball valve air tightness detection device is characterized in that the detecting body is provided with two pushing bodies coaxially connected in series; the two pushing bodies are provided with pressure plates in extrusion fit; a sealing body capable of expanding along the radial direction is arranged between the two pressure plates; the two pressure plates and the sealing body constitute a sealing head matching an inner hole of a ball valve to be detected; the sealing head is internally provided with an inflatable channel; one end of the inflatable channel is communicated with an inflatable cylinder; and the inflatable channel is externally connected with a pressure gauge through an air pipe, and the air pipe is provided with an overvoltage protection mechanism. As the detecting body is internally provided with the inflatable cylinder, no external air source is needed. The pushing bodies seal the inner cavity of the valve body in the operation process to realize continuous, quick and automatic inflation, and the pressure value can be read directly from the pressure gauge and is clear at a glance. Water-free test is realized, which helps to protect the environment. The degree of automation is high. The test efficiency is improved. The reusability is high. The labor cost is reduced.

Description

technical field [0001] The invention relates to a valve body detection technology, in particular to a polyethylene ball valve air tightness detection device. Background technique [0002] Ball valve products must be tested for air tightness before leaving the factory to ensure product quality. In the prior art, there are many detection devices of this type, and their structures are varied. For example, the patent publication number is a kind of ball valve air tightness detection device designed by CN105043675A, which includes an air supply pump, an air pressure sensor, a main frame, two push plate cylinders, Two side frames, main end cover, auxiliary end cover, and two push plate cylinders are respectively arranged on the two side frames, the piston rod of one push plate cylinder is connected with the main end cover, and the piston of the other push plate cylinder The rod is connected with the auxiliary end cover, the main end cover is provided with a main elastic sealing r...

AI Technical Summary

Problems solved by technology

These methods require an external air source for testing, which is limited by conditions. Putting the ball valve into the liquid for testing is inefficient and causes a messy environment.

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