油缸底板焊缝的气密性检验,一般采用真空试验法。我厂原用的真空箱需要几个人抬,用真空泥密封,密封效果不好、速度慢、劳动强度大,检验方式落后。为改变这种状况,在原有的基础上改制了一台真空试验小车。该小车包括真空箱、箱内照明和行走机构三个主要部分,见下图。当手把19处于A位时,小车可直立推动;当手把19处于B位时,将车轮提起,海绵橡胶圈2落地,与钢板和焊缝接触,即可抽真空, Tank bottom weld airtightness test, the general use of vacuum test method. Vacuum box used in our factory need a few people lift, sealed with a vacuum mud, sealing effect is not good, slow, labor-intensive, testing methods behind. In order to change this situation, a vacuum test car was remodeled on the basis of the original one. The car includes a vacuum box, the lighting and walking inside the box three main parts, see below. When the handle 19 is in the A position, the car can be erected to promote; when the handle 19 is in the B position, the wheels lifted sponge rubber ring 2 landing, and steel and weld contact, you can vacuum,