A new type of mass measuring device for saturated hydraulic conductivity of fixed head. The measuring device mainly includes water supply cabinet (according to the principle of Markov bottle) to control water pressure and supply water, water head holder (ring knife), sample ring knife, funnel rack, beaker and electronic balance. The water supply cabinet is provided with parallel ports. The water supply cabinet provides stable water source by adjusting the height of the water supply cabinet's pressure regulating / intake pipe. The hard pipe with valve is connected with the water tank. A valve is arranged on the branch pipe of the hard pipe. One end of the hose is connected to the valve on the branch pipe, and the other end is lowered into the water head to maintain the cylinder. The head retaining cylinder is placed above the sample ring knife, and the connection is fixed by elastic sealing rubber ring. The water collecting bucket rack has an upper plate and a lower plate, a funnel and a plate net. There are beaker and electronic balances below the funnel. The device can simultaneously measure single or multiple samples according to the need of sample number, and has low cost, controllable, easy to use and easy to popularize.
【技术实现步骤摘要】
一种定水头土壤饱和导水率批量测定装置
本申请涉及一种土壤参数测定的测定装置,具体是涉及一种定水头土壤饱和导水率批量测定装置。
技术介绍
土壤饱和导水率是一项重要的土壤物理性质参数,其在土壤的水传递模型中有重要的意义。此参数的具体数值变异性很大,在实际应用中按照需要确定测量范围的精度。在《LY/T1218-1999.森林土壤渗透性的测定》标准中规定了一种纯手工的定水头测定方法,但是需要在实验室内用人工费时费力地单个进行测定,并且手工测水量时用量筒测量误差比较大。同时市面上的售卖的饱和导水率测定仪又通常结构复杂、精密且非常昂贵,不便于推广应用。授权公告号CN205607822U(申请号201620448181.9)的中国专利文献公开了一种测定不同温度情况下土壤饱和导水率的批量测定仪,其缺点是整个仪器本身没有自动实现常水头的保持,另外,由该文献中图1可知,其水箱比较高,高度落差远远大于环刀本身的高度,当在实际环境中,太大的水头压力会造成渗透水比较快,该文献中用于集水的三角瓶估计很快就会满,测量中必须及时更换。授权公告号CN204439503U(申请号201520140760.2)的中国专利文献公开了一种土壤饱和导水率自动测定装置,其为了解决马氏瓶内水可能不够用(试验过程中普通马氏瓶的加水会破坏水头的稳定)的问题,通过改造增加了图1中的自动进水开关11来解决。但是,进水开关11开通进水时,装置1内的液面上方的空气如何排出是个问题。除非同时关闭控制阀门12,并手工打开装置顶部的橡皮塞。但这样操作的同时环刀3内就没有了供水来源,水头降低。但如此一来,自动进水的意义就不 ...
【技术保护点】
1.一种定水头土壤饱和导水率批量测定装置,包括供水柜、供水柜支架、样品环刀、水头保持筒、漏斗架、烧杯、电子天平,所述供水柜固定于在供水柜支架上,所述供水柜上端左侧设置有供水柜进水孔橡皮塞,所述样品环刀通过漏斗架接入烧杯中,烧杯放置于电子天平上,其特征在于,所述供水柜上端右侧设置有供水柜调压/进气管,所述供水柜右侧下端连接水管,水管临近供水柜一侧设有总阀门,所述水管下方设有软管,软管放入水头保持筒中,软管长度要保证待液面稳定时软管出水口位于水头保持筒中液面以下,所述样品环刀与水头保持筒通过密封橡胶圈连接,所述水头保持筒的长度大于或等于所述水柜调压/进气管的下端距离样品环刀土样上表面的高度差h,所述漏斗架固定在供水柜支架上右侧,所述漏斗架分为两层,两层之间是漏斗边缘和网板。
【技术特征摘要】
1.一种定水头土壤饱和导水率批量测定装置,包括供水柜、供水柜支架、样品环刀、水头保持筒、漏斗架、烧杯、电子天平,所述供水柜固定于在供水柜支架上,所述供水柜上端左侧设置有供水柜进水孔橡皮塞,所述样品环刀通过漏斗架接入烧杯中,烧杯放置于电子天平上,其特征在于,所述供水柜上端右侧设置有供水柜调压/进气管,所述供水柜右侧下端连接水管,水管临近供...
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