The invention discloses a pressure stabilizing device of hydraulic loading, including high-pressure tubing, vacuum cylinder and weighing cylinder, high pressure chamber of the decompression cylinder is connected with the high-pressure oil tube, low pressure cavity decompression cylinder through the low-pressure pipe and is communicated with the oil cylinder piston rod weighing, weighing cylinder upward and connected with a weight tray. The high-pressure tubing of the device connected to common hydraulic loading system (oil pump - Jack loading system), add the appropriate weight in weight tray in weight, when the change of working oil pressure, pressure cylinder motion driven small stroke, weighing cylinder series at the same time the big movement. Since the pressure value of the weighing cylinder is only related to the weight value of the weight, the change ratio of the pressure reducing cylinder is only certain, so the pressure of the working oil circuit can be stabilized. The invention is only a hydraulic mechanical device, and has the advantages of reliable work, good voltage stabilizing performance, convenient installation and use, wide application pressure range, etc..
【技术实现步骤摘要】
本专利技术涉及液压加载系统，具体涉及一种液压加载用的稳压装置，可使加载油路的压力在工作过程中保持稳定。
技术介绍
当进行结构试验或工程检测时，所加载的千斤顶荷载要保持不变， 一定要使工作油路压力稳定不变或变动幅度很小。这样才能满足科研精度的要求和检测规范的要求，试验结果和检测数据才能真实有效。在进行土木结构抗震性能低周反复试验时，常见的试件分别为墙体、框架、柱、十字节点等。试验时通过液压千斤顶加竖向荷载模拟竖向力，同时通过电液伺服作动器加水平荷载模拟地震作用。结构或构件在真实地震作用下，竖向荷载可视为无变化，而在试验过程中发现随着水平荷载的施加，试件顶部产生竖向位移，反作用于千斤顶，由于液压油为不可压縮液体，现有的竖向液压加载系统的力值难以稳定，变化幅值最大高达50%以上。引起这个问题的原因， 一是试件顶部竖向位移随水平位移的出现而产生，试件顶部随着水平位移高低起伏；二是因为单个试件的试验时间较长(一般一个试件的试验周期为半天左右)，油路系统时有泄漏，难以稳压。由于试件本身变形引起的油路压力变化的土木工程检测和科研试验方面的例子还有很多。例如，(1)在工程基桩静...
【技术保护点】
一种液压加载用稳压装置，包括一高压油管（６），其特征是：还包括减压油缸（４）和称量油缸（３），所述减压油缸（４）的高压腔（４１）与高压油管（６）相连接，减压油缸（４）的低压腔（４２）通过低压油管（５）与称量油缸（３）相连通，称量油缸（３）的活塞杆（３１）向上与一砝码托盘（７）相连接。
【技术特征摘要】
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