In the submarine battery tank the storage battery charging and discharging, the electrolysis of water and oxygen device leaking and the water decomposition of the radioactive materials will generate harmful gases, such as the hydrogen, the antimony of hydrogen and the ar?senic of hydrogen and toxic. Based on the air in the submarine battery tank overweight circumstances, according to the technology principle of the air purification unit, the paper analyzed the the reason of the harmful gas overweight, made some suggestions to ensure the fighting capaci?ty, the survival ability and the of the submarine and healthy body of the four-degree. This paper can offer reference and basis for the the de?sign and improvement of the air purification device in the submarine battery tank.

Realization of boiler welding automation, the difficulty lies in the flat tube plate parts of the sewing ring inner welding, especially the last combined weld. As a result of poor welding conditions, automatic submerged arc welding machine can not enter the cylinder body to weld. This paper adopts the improved equipments, conventional automatic submerged arc welding for welding. It can realize welding automation of the circumferential butt joint welding. Reduce production cost and labor intensity, improve the work efficiency and welding quality.

提出了一种可发射埋头弹(CTA)的火炮自动机及计算模型.该模型的药室与身管分开,后坐时药室在凸轮的驱动下绕固定在炮箱上的固定转轴旋转,完成开闩、输弹动作.复进过程中,药室反方向旋转完成关闩.该模型采用浮动原理,具有高低角后坐补偿机构和不到位保险机构,特别适用于步兵战车.