Short straight metal pressure pipe fitting bulge test apparatus

Abstract

The invention discloses a short straight metal pressure pipe fitting bulge test apparatus, which belongs to the field of a machinery apparatus. The short straight metal pressure pipe fitting bulge test apparatus comprises pressure plates, flexible sealing pads, a mandrel and a nut, the mandrel is a dumbbell type, wherein an intermediate part is a first step, the steps from the second step to the ninth step are symmetrically arranged at the right end and the left end of the mandrel, the steps from the second step to the fifth step are arranged at the left end of the mandrel, the steps from the sixth step to the ninth step are arranged at the right end of the mandrel, the maximum axle diameters are less than or equal to the internal diameter of the to-be-measured pipe fitting, an inward pore is arranged on the first step, the pore extends to a random end part of the mandrel, the pressure plates and the flexible sealing pads are arranged on the third step and the seventh step, the outside threads are arranged on the fourth step and the seventh step, and the nut is cooperated with the corresponding step through the outside thread. The apparatus has the advantages of simple structure, safety and reliability, and convenient operation, and can effectively detect the sealing performance of the short straight metal pressure pipe fitting.

Description

technical field [0001] The invention belongs to the field of mechanical devices, in particular to a pressure test device for short straight metal pressure pipe fittings. Background technique [0002] The hydraulic system and pneumatic system of the product car in the factory have some short straight metal pressure pipe fittings that need to be pressure tested before assembly to test whether the pressure resistance of the pipe fittings can meet the requirements of use, and at the same time, after a period of pressure holding, the tightness can be tested Is it good. Short straight metal pressure pipe fittings are usually straight metal thin-walled pipes with rolling waves at both ends. In the pressure system of vehicles, they are usually connected with bellows by clamps. Because of the non-threaded structure at the ends, they cannot be used for pressure tests. Screw plug parts are used to seal the ends, and it is difficult to perform pressure tests on such short straight meta...

AI Technical Summary

Problems solved by technology

Short straight metal pressure pipe fittings are usually a straight metal thin-walled pipe with rolling waves at both ends. In the pressure system of a vehicle, a clamp is usually used to connect the bellows. Because of the non-threaded structure at the end, it cannot be used in the pressure test. Screw plug parts are used to seal the ends. It is difficult to perform pressure tests on such short straight metal pressure pipe fittings.

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