Before each loading, flush the inlet with water to keep it moist during loading; fill the clean water tank with water during loading; flush the inlet after loading to clean the residual concrete near the inlet; after unloading at the construction site, flush the discharge chute, and then add 30-40% clean water into the concrete tank 50. When the vehicle returns, the concrete storage tank shall be rolled forward slowly; the sewage in the concrete storage tank shall be discharged before the next loading; when the work is finished every day, the concrete storage tank and the surrounding of the inlet and outlet shall be completely cleaned to ensure that there is no cement and concrete caking.
Soak a piece of 600 mm sandpaper in ATF oil for about 30 minutes. Knock the valve body carefully to make the stuck valve stem fall from the valve cavity hole. It may be necessary to pry it out with a small screwdriver. When using a screwdriver, be careful not to scratch the valve hole. Check whether there is conflict trace on one-way valve stem. Use # 600 sandpaper soaked in ATF oil to grind the burr on the valve stem, then clean the valve stem in solvent and dry it with compressed air. Roll up half a piece of ා 600 sandpaper soaked in ATF oil and insert it into the valve hole of stuck valve stem. Twist the sandpaper quietly to make the sandpaper loose and tightly fit on the surface of the valve hole, and then roll the sandpaper while pushing and pulling to polish the valve hole. Take out the 600 sandpaper. Completely clean all valve bodies in solvent and blow dry with compressed air. Coat the valve stem with ATF oil and drop it into the valve hole. The valve stem shall be able to fall into the bottom of valve hole by self weight. Otherwise, repeat process 4 and test again. If the stem is still stuck, replace the valve body.
The goal of all equipment is to be active and intelligent, especially for the concrete pumping equipment with bad environment and high labor intensity. Now the small concrete pump truck initiative technology has achieved certain results.
As for the pipe blockage of pump truck, it is often encountered in concrete pumping. If the pipe blockage can be found early and adopted the accurate method, it can be eliminated. However, if it is found too late or the accurate method is not adopted, the pipeline may be blocked, leading to long-term construction suspension and even affecting the construction quality. The pressure sensor is selected to monitor the pipeline from time to time for anti blocking pipe control. When the blockage occurs, the pressure in the pipeline will be abnormal. The pressure sensor will send this signal to PLC, and PLC will immediately announce the warning and take the initiative to dredge the pipeline.
In terms of intelligent boom, now the boom of pump truck can only be directly controlled by the operator to make the boom move to the desired direction. Each arm of intelligent boom is equipped with an orientation sensor. Through the computer, the closed-loop control and motion harmony control can be completed.
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