一种新型大流量注浆泵送装备的试验研究

Experimental Research on A New Large Flow Grouting Pumping Equipment

注浆泵送装备输浆流量小、效率低是目前岩溶地区大流量突涌水治理面临的重大难题之一.基于已成功研发的新型大流量注浆泵送装备,研制了一套适用于测试分析该装备性能参数和工程适用性的室内试验系统,该系统由多元信息参数采集装置、大型制浆储浆设备和循环耐压输浆管路等组成,可实现大流量、多参数下持续性测试,获取流量、压力、不均匀系数、容积效率及机械效率等关键指标参数及其影响因素.依托试验测试系统开展充填注浆模拟试验,试验结果表明:该新型注浆装备可实现0~35m3·h-1内流量无级调节,最佳输出转速780r·min-1.相较现有三缸往复式注浆泵,其流量不均匀系数降低60%,机械效率提高22%,具有流量大、脉冲小、能耗低及重量轻等显著特点.在室内试验基础上,通过现场试验进一步验证了该新型注浆装备的可靠性和适用性.

Small flow and low efficiency of the current grouting pumping equipment is the major problems of water inrush grouting engineering in karst areas. Based on the new large flow grouting pumping equipment which has been developed successfully,an indoor auxiliary test system for analyzing the new equipment was developed. The system includes real time multiparameters monitoring device,large slurry-making and storage device,and cyclic withstand slurry pipeline.It can satisfy the test demand of large flow,multi-parameters and circulation.The key parameters of discharge,pressure,uneven coefficient,volumetric efficiency and mechanical efficiency could be obtained by the test system. Test results show that： the new grouting equipment has a output flow within 0 ~ 35 m3·h-1,which can be stepless adjustment; its best output speed is 780 r·min-1; Compared with the existing three cylinder reciprocating grouting pump,the flow unevenness coefficient of the new pump reduced by 60%,the mechanical efficiency increased by 22%.Generally,the new grouting equipment has significantly advantages of large flow,small pulse,low energy consumption and light weight. The reliability and applicability of the new equipment were verified according to field test.