四川芙蓉矿务局研制成功的单体液压支柱可拆卸加长装置具有结构简单、现场拆装灵活、安全可靠等优点。它能在不改变单体液压支柱原有结构和注液高度的条件下扩大支柱支撑高度的调节范围。 可拆卸加长装置是由直管段和与直管段固接成一体的加大段两部分组成的接长管,它接在支柱活柱头与顶盖之间。直管段与加大段的端部壁上均有与活柱头和顶盖上联接销孔相匹配的销孔。单体液压 Sichuan Furong Mining Bureau successfully developed a single hydraulic prop removable structure with a simple extension, on-site disassembly flexible, safe and reliable. It can expand the adjustment range of the pillar support height without changing the original structure of the single hydraulic prop and the injection height. The detachable lengthening device is a connecting pipe consisting of a straight pipe section and an enlarged section integrally fixed with the straight pipe section, which is connected between the pillar head and the top cover. Both the straight pipe section and the end wall of the enlarged section have pin holes that match the pin holes of the living column head and the top cover. Single hydraulic