Device and method for detecting air impermeability of bellows

Abstract

The invention discloses a device for detecting the air impermeability of bellows and relates to the technical field of equipment for detecting the air impermeability of bellows. The device comprises two bellows fixing stations and two pressurizing mechanisms. Two bellows fixing stations are used for fixing two bellows to be detected respectively. The output ends of the two pressurizing mechanismsare connected to one ends of the two bellows to be detected respectively, and the other ends of the two bellows to be detected are connected by a detecting tube. The device can be applied to bellows of various lengths, has good universality, and can save space. In addition, by firstly connecting the two bellows to be detected and then injecting the same gas into both ends, the two ends can maintain the same air pressure. Then, the change of the air pressure at both ends is observed. The detection method is simple and visualized on the one hand, and can simultaneously detect two bellows on theother hand, thereby improving detection efficiency and achieving good practicability.

Description

technical field [0001] The invention relates to the technical field of bellows airtightness detection equipment, in particular to a bellows airtightness detection device and detection method. Background technique [0002] Stainless steel corrugated pipe is installed in the liquid conveying system as a flexible pressure-resistant pipe fitting to compensate for the mutual displacement of the connecting ends of pipes or machines and equipment, absorb vibration energy, and can play the role of vibration reduction and noise reduction. It has good flexibility and light weight. , corrosion resistance, fatigue resistance, high and low temperature resistance and many other characteristics. However, the use of existing bellows generally requires a component structure with flanges welded at both ends. When in use, the inner cavity of the bellows is filled with a certain pressure of gas or liquid medium, such as gas and other flammable gases. Therefore, its sealing must be guaranteed. ...

AI Technical Summary

Problems solved by technology

[0005] 1) Whether there are bubbles needs to be judged manually, so there are cases of misjudgment and misjudgment;

[0006] 2) Water itself has a certain corrosive effect on stainless steel, which affects product quality;

[0007] 3) During the inspection, the sealing of the product requires manual operation, and the cooperation of two people is required. Manually screw the sealing plugs into the pipe joints at both ends, 8 hours a day, the number of inspections is about 500 pieces, and 0.5 cubic meters of water is needed every day. Low, which increases the detection cost;

[0008] 4) After the product is tested, it needs to be dried. The power of the dryer is 10KW. It needs to be dried continuously for 3 hours a day, and the power consumption is 30KWH per day, which increases the production cost and reduces the production efficiency.

[0010] However, it still has relatively serious disadvantages. For example, a detection core rod with the same material and length as the corrugated pipe to be tested is required for detection. Insert the detection core rod into the corrugated pipe to be tested as a support, and then fixedly connect the corrugated pipe to be tested. both ends, then test

In actual use, on the one hand, because the bellows have multiple standard lengths and other non-standard lengths, it is necessary to make a series of detection core rods of different lengths to match the bellows of different lengths, which increases hardware costs and management costs. On the one hand, due to the long length of the bellows, it is necessary to insert or remove the detection core rod of the same length into the bellows during detection, which requires a large operating space and does not use the operation of a single worker.

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