Device for testing internal sealing property of piping

Abstract

The invention discloses a device for testing the internal sealing property of a piping and aims to provide the device which is convenient for operation, provides high-accuracy testing results, and ensures that an end of the piping cannot be easily damaged by clamping. The device comprises an air supplying pump, an air pressure sensor, a main machine support, two push plate cylinders, two side machine supports, a main end cap, and an auxiliary end cap. The two push plate cylinders are arranged on the two side machine supports respectively. A piston rod of one of the push plate cylinders is connected with the main end cap, and a piston rod of the other push plate cylinder is connected with the auxiliary end cap. A main elastic sealing ring pad is arranged on the main end cap. An auxiliary elastic sealing ring pad is arranged on the auxiliary end cap. The main end cap is provided with a main cap vent. The device can precisely position a piping, ensures sealing property without damaging the piping through clamping, has an adaptive sealing structure, can reinforce the sealing effect during high-pressure testing, has an auxiliary positioning structure, can avoid end cap retreat and protect the push plate cylinders, is improved in sealing effect, and maintains the stability of the testing process.

Description

technical field [0001] The invention belongs to the technical field of airtightness testing of pipe fittings, in particular to a device for detecting the inner airtightness of pipe fittings. Background technique [0002] Pipe fittings (pipes) of various materials are often used to transport various gases and liquids. Gas or liquid flows in pipe fittings. Pipe fittings have different sealing requirements when used in different occasions. Generally speaking, pipe fittings with sealing requirements are used in Leakage testing is required before leaving the factory, otherwise there will be greater safety hazards. [0003] In the prior art, when testing pipe fittings, gaskets or sealing rings are usually placed on the outside of both ends of the pipe fittings, and at the same time, force-applying devices such as jacks or hydraulic cylinders are used to clamp the two ends of the pipe fittings, so that the two ends of the gasket or sealing ring and the pipe fittings The end (pipe ...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned test method has the following disadvantages: 1. The operation process is complicated, and the weight of the frame is relatively heavy. It is necessary to immerse the frame in water with the help of external equipment, and the installation of the pipe fittings is also relatively troublesome; 2. Use a jack to press down the plate to seal the pipe fittings And when the sealing ring is placed outside the two ends of the pipe fitting and clamped by the hydraulic cylinder to seal at both ends of the pipe fitting, the strength of both is difficult to control. If the force of pressing down or clamping is not enough, the pressure plate and the pipe fitting end may The seal of the inner part is not reliable, which affects the accuracy of the test and leads to misjudgment of quality. If the pressure or clamping force is excessive, the pipe fittings will be deformed, resulting in uneven end faces of the pipe fittings (pipe ends), thus making the pipe fittings It cannot form a seal with the pressure plate, which will lead to misjudgment of quality. In addition, if the force of pressing down or clamping is excessive, it may also directly damage the pipe fittings

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