Compression test device for buoyancy material of life jacket

Abstract

The invention relates to a compression test device for a buoyancy material of a life jacket. The compression test device comprises a compression platform, an air pump, a vacuum pump, an air capacitor,a first pressure reducing valve, a second pressure reducing valve, an air pressure control unit, a load type pressure transmitter and a pressing block; a tested sample is placed on the compression platform, the pressing block presses the tested sample, and the load type pressure transmitter acts on the pressing block; the air capacitor is connected with the negative pressure type pressure transmitter, and the air pump is connected with the air capacitor through the first pressure reducing valve; the vacuum pump is connected with the air capacitor through the second pressure reducing valve; the air pressure control unit is in signal connection with the negative pressure type pressure transmitter, the first pressure reducing valve and the second pressure reducing valve, receives pressure feedback of the second pressure reducing valve and controls the opening degree of the first pressure reducing valve and the opening degree of the second pressure reducing valve.

Description

technical field [0001] The invention relates to a lifejacket buoyancy material compression test device, which belongs to the technical field of lifejacket production. Background technique [0002] As a kind of personal life-saving equipment, life jackets are necessary protective equipment for various water activities, and are widely used in fishery, water transportation, water sports, water operations, emergency rescue and disaster relief, etc. Divided according to the material and method of providing buoyancy, lifejackets include filled inherently buoyant lifejackets that mainly rely on hydrophobic lightweight materials to provide buoyancy, and inflatable lifejackets that rely on the formation of expansion chambers, air bags or air bags inside and outside the lifejacket to provide buoyancy. But the inflatable lifejacket has a fatal weakness, that is, when the airbag breaks or leaks, the buoyancy will be lost instantly, which greatly reduces the insurance factor, and this ki...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when testing the evaluation of the buoyancy characteristic change of this "inherently buoyant material" after being subjected to pressure, a tension machine and other equipment are used to carry out the pressure test. The speed is slow, the accuracy of pressure application and the response speed are also slow. At the same time, the scalability of the equipment for simultaneous testing of multiple samples to be tested is also poor, and the cost of testing equipment is high. For general product designers, There is no incentive to add such testing equipment

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