Pipe fitting airtightness testing machine

Abstract

The invention discloses a pipe fitting airtightness testing machine and aims at achieving the effects that the pipe fitting airtightness testing machine is convenient to operate, high in testing result accuracy and capable of guaranteeing that the two pipe ends of a pipe fitting are not prone to being damaged due to clamping. The machine comprises an air feed pump, a baroceptor, a main rack, two push plate air cylinders, two side racks, a main end cover and a subsidiary end cover, the two push plate air cylinders are arranged on the two side racks respectively, a piston rod of one of the push plate air cylinders is connected with the main end cover, a piston rod of the other push plate air cylinder is connected with the subsidiary end cover, a main elastic sealing ring pad is arranged on the main end cover, a subsidiary elastic sealing ring plate is arranged on the subsidiary end cover, and a main cover air hole is formed in the main end cover. The pipe fitting airtightness testing machine has the advantages that the pipe fitting can be positioned to the right position, the airtightness can be guaranteed, and the pipe fitting is not damaged due to clamping; the device is provided with a sealing structure which can be adjusted in a self-adaptation mode, and the airtightness effect in the high pressure testing process can be intensified; the machine is provided with an assistant positioning structure, the end covers can be prevented from moving backward, the push plate air cylinders can be protected, the sealing effect can be improved, and stability in the testing process can be maintained.

Description

Technical field [0001] The invention belongs to the technical field of pipe fitting air tightness testing, and particularly relates to a pipe fitting air tightness testing machine. Background technique [0002] Pipe fittings (pipes) of various materials are often used to transport various gases, liquids, and gas or liquid flowing in the pipe fittings. The pipe fittings have different sealing requirements when used in different occasions. Generally speaking, the pipe fittings with sealing requirements are Before leaving the factory, the leak tightness test is required, otherwise there will be greater safety risks. [0003] When testing pipe fittings in the prior art, gaskets or sealing rings are usually placed outside the two ends of the pipe fittings, and at the same time, a jack or hydraulic cylinder is used to clamp both ends of the pipe fittings, so that the sealing gasket or sealing ring and the pipe fittings are two The end (pipe end) forms a seal, and the entire sealed 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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