在滑模施工中,通用的HQ—30千斤顶大都为依靠大弹簧回油,上下卡头部分有滚珠式的和楔块式的。千斤顶在使用中,由于依靠弹簧回油,不同步较突出,钳工检修劳动强度相当高。因而,一公司机械科的同志们设计了一种双油路千斤顶,取消大弹簧,采取强制回油。活塞做成“十”字形,上下卡头改为楔块式的。新设计的双油路千斤顶比HQ—30千斤顶高了约40％,重了2公斤。设计方案确定之后,先试制了一台。经过负荷试验鉴定,生产了一百台,并在上泉选矿厂贮矿仓滑模施工中试用成功。 In slipform construction, the general HQ-30 jacks mostly rely on large springs to return oil. The upper and lower chuck parts have ball type and wedge type. Jacks in use, due to the return of oil rely on springs, out of sync more prominent, labor-saving maintenance of bench work is quite high. Therefore, a company’s mechanical comrades designed a double oil jack, cancel the big spring and take a forced return. The piston is made into a “10” shape, and the upper and lower chucks are changed to a wedge type. The newly designed twin oil jacks are about 40% higher than the HQ-30 jacks and weigh 2kg. After the design plan was finalized, it was trial-produced. After the load test and appraisal, 100 units were produced and successfully tested in the sliding mode construction of the storage bin in the Shangquan Concentrator.