Sodium-based bentonite waterproof blanket hydrostatic pressure tester is a testing instrument, designed and manufactured according to JG / T193-2006 sodium hydrostatic pressure measurement standard. It is suitable for measuring the hydrostatic pressure resistance of various sodium-based bentonite waterproof blankets, and has the advantages of compact structure and easy operation.
♦在钠基膨润土防水毯两侧压差达到一定值后，防水毯** 会被破坏。逐级增加试样两侧水力压差，并保持一定时间，当出 水口有水流出时， 表明试样受到破坏，也**获得了试样的耐静水 压值。
Second, the working principle:
♦ After the pressure difference between the two sides of the sodium-based bentonite waterproof blanket reaches a certain value, the waterproof blanket ** will be destroyed. Increase the hydraulic pressure difference between the two sides of the sample step by step and keep it for a certain time. When water flows out of the water outlet, it indicates that the sample is damaged, and the hydrostatic pressure resistance value of the sample is also obtained.
♦ Hydrostatic pressure test adopts Nan 55 type infiltration meter, in which the infiltration container is mainly composed of permeable stone, cylinder, top cover and bottom cover.
Third, the technical parameters:
♦ Test piece size: Φ55mm
♦ * High pressure 2.5MPa
♦ Power supply voltage: 380V 50hz
♦ Overall dimensions: 600X750X1200mm
♦ Whole machine weight: 150Kg
♦在距膨润土防水毯边缘 100mm以上的位置上， 画出直径与 南 55 型渗透仪的透水石大小相同的圆形弧线，用滴管在圆形弧 线周边滴适量水，5min后按圆形弧线裁切试样。
♦将透水石放在南55型渗透仪的底部，在透水石上铺一层石 英砂，将一块试样放在石英砂上，试样周围空隙部分用膨润土粉 料添满压实， 其高度与试样的高度相同， 在试样的上面填满细砂， 然后盖上另一块透水石和顶盖， 拧紧螺帽，打开加压阀门给供水 室适当加压.
♦压力设定：开机后按设定键“回” 按移位键“>” 再按 调整键“+”和“--”再调整数值，调好后，按设定键“回”存 入。在调整完下限数值后，按设定键可退出。1 小时后下限上升 为 0.1MPa 时间清除：重新做实验，持续按“--”键不释放，**先显示时间 值，10 秒后时间可从 0 小时开始， “！ ”工作时不能误按。
♦时间查阅：按 “—” 键压力变为小时显示，上限为分钟， 下限为秒。30 秒后回到压力显示，
♦零点调整：开机后在无压力时如不回零，按动一次，可置 零。有压力时勿按清零键，放压后再置零. 当渗透仪内存气体全部从排气管排除后， 立刻关闭阀门封闭排 气管。
♦保持30min，使试样充分膨胀，然后每隔 1h打开加压阀 门提高0.1MPa的水压，直至达到规定压力。若测试过程中出水 口一直没有水流出，判定该试件的耐静水压性能合格， 否则判定 该试件的耐静水压性能不合格。
Fourth, the test method
♦ At a position more than 100mm from the edge of the bentonite waterproof blanket, draw a circular arc with the same diameter as the pervious stone of the South 55 type osmometer. Use a dropper to drip an appropriate amount of water around the circular arc. Cut the specimen in a curved line.
♦ Place the pervious stone on the bottom of the South 55 type osmometer, place a layer of quartz sand on the pervious stone, place a sample on the quartz sand, and fill the space around the sample with bentonite powder to compact it. The sample height is the same. Fill the top of the sample with fine sand, then cover another permeable stone and top cover, tighten the nut, open the pressure valve to properly pressurize the water supply chamber.
♦ Pressure setting: Press the setting key "Back" after starting the machine, press the shift key ">", and then press the adjustment keys "+" and "-" to adjust the value. After adjustment, press the setting key "Back" to save . After adjusting the lower limit value, press the set key to exit. After 1 hour, the lower limit rises to 0.1 MPa. Time clear: Re-do the experiment, keep pressing the "-" key without releasing, ** first display the time value, the time can start from 0 hours after 10 seconds, and "!" Cannot be pressed by mistake during work. .
♦ Time check: press “—” key, pressure will change to hour display, upper limit is minute, lower limit is second. After 30 seconds return to the pressure display,
♦ Zero adjustment: if it does not return to zero when there is no pressure after starting, press it once to set it to zero. Do not press the zero key when there is pressure, and set it to zero after depressurizing. When all the gas in the permeameter is exhausted from the exhaust pipe, immediately close the valve to close the exhaust pipe.
♦ Keep it for 30 minutes to fully expand the sample, and then open the pressure valve every 1 h to increase the water pressure of 0.1 MPa until the specified pressure is reached. If there is no water flowing out of the water outlet during the test, it is judged that the test piece has passed the hydrostatic pressure resistance, otherwise it is judged that the test piece has failed the hydrostatic pressure resistance.
♦ Calculation of inspection results is performed according to relevant standards.
钠基膨润土防水毯耐静水压测定仪实验完毕，打开排气、放水阀，清理仪器表面，把常试仓 压盖，仓底盘，擦干并涂上防锈油脂，如设备长期不用，可打开 主机右下方的放水阀门，将系统内部的水全部放出，以防冻裂。
Sodium-based bentonite waterproof blanket hydrostatic pressure resistance tester is finished. Open the exhaust and drain valves, clean the surface of the instrument, cover the common test chamber, the bottom of the chamber, dry it and apply rust-proof grease. Open the water drain valve at the bottom right of the host computer to drain all the water inside the system to prevent frost cracking.