The "closed tank" of concrete mixer refers to that the impeller of concrete mixer is suddenly blocked by concrete and can not roll. In this case, the main motor of the mixer will stop running when it is charged. If the electrical maintenance part is not maintained in time, or the maintenance time and other parameters are set unreasonably, the main motor may be burned. The following small series to introduce the reasons for the concrete mixing tank stewing tank and how to prevent the concrete mixing tank from sticking to the tank.

　　一、混凝土攪拌機“悶罐”的原因

　　1、 Causes of concrete mixer's "stuffy tank"1、主電機皮帶過松，動力傳遞缺乏。這種情況下，攪拌機內攪拌阻力稍大，就可能被卡住，從而形成悶罐現(xiàn)象。

　　1. The belt of main motor is too loose and the power transmission is lack. In this case, if the mixing resistance in the mixer is slightly larger, it may be stuck, thus forming the phenomenon of stuffy tank.

　　2、一次性投料過多，比方應該是兩盤攪拌量，由于錯誤動作一次投攪拌機，那么很就可能悶罐了。有時候由于攪拌機開門時間不合理，上盤料卸不潔凈也可能形成悶罐。

　　2. One time feeding is too much, for example, it should be two plates of mixing volume. Due to the wrong action, the mixer is likely to be blocked. Sometimes, due to the unreasonable opening time of mixer, the unclean unloading of the upper plate may also form a closed tank.

　　3、攪拌機內襯板磨損嚴重，或許攪拌葉磨損嚴重，形成攪拌葉和攪拌機內襯板間隙過大，或許間隙嚴重不均勻，也是形成悶罐的多發(fā)原因，這種情況下，攪拌葉與攪拌襯板間必然會有較多的堅固粗骨料，攪拌機被卡死，也就不足為怪了。

　　3. The inner lining plate of mixer is seriously worn. Perhaps the mixing blade is seriously worn, resulting in the excessive gap between the mixing blade and the inner plate of the mixer, or the gap is seriously uneven, which is also the frequent cause of the formation of the tank. In this case, there must be more solid coarse aggregate between the mixing blade and the mixing lining plate, and it is not surprising that the mixer is stuck.
             

　　4、投料的份額不合理，或許次序不對，也有可能悶罐，特別是投料中沒有水，會大大添加攪拌阻力。

　　4. The feeding proportion is not reasonable, maybe the sequence is wrong, or the tank may be stuffy, especially if there is no water in the feeding, the mixing resistance will be greatly increased.

　　5、攪拌罐車“抱大軸”（指的是拌和機主軸粘結許多混凝土），或許其它部位粘結過多的混凝土，也是形成“悶罐”的多發(fā)原因。攪拌機里邊粘結東西越多，攪拌阻力越大，嚴重時就形成悶罐。這種情況下，操作手應密切注意攪拌主機的電流數(shù)值，電流數(shù)值過大，就有可能需求整理一下攪拌機內部了；6、攪拌罐車內混入鋼筋棍、鐵板等異物，或者攪拌臂折斷、電機相間不平衡、電源電壓過低一級異常情況也可能形成“悶罐”一般情況下，在一段時間內經常性的悶罐，前三種可能性更大一些。假如攪拌電機電流大，第五種可能性更大。

　　5. Mixing tank truck "holding big shaft" (refers to the mixer spindle bonding a lot of concrete), perhaps other parts of the bond too much concrete, is also the cause of the formation of "closed tank". The more things are bonded inside the mixer, the greater the mixing resistance is, and when it is serious, it will form a closed tank. In this case, the operator should pay close attention to the current value of the mixing machine. If the current value is too large, it may be necessary to sort out the mixer interior; 6. The mixing tank truck is mixed with steel bars, iron plates and other foreign matters, or the mixing arm is broken, the motor phase is unbalanced, and the power supply voltage is too low. Generally speaking, in a certain period of time, the "closed tank" may be formed The first three are more likely to be closed. If the stirring motor current is large, the fifth possibility is greater.

　　二、防止混凝土攪拌機粘罐的方法

　　2、 Methods of preventing concrete mixer from sticking to tank1、在施工現(xiàn)場卸料完畢后，應立即用山東自動上料攪拌車隨帶的軟管沖洗進料斗、出料斗、卸料溜槽等處，粘附在車身各處的污泥及混凝土。在返回攪拌站的途中，應向攪拌筒內注150---200L水以清洗筒壁及葉片粘結的混凝土殘渣。

　　1. After unloading at the construction site, the inlet hopper, discharge hopper and discharge chute should be flushed with the hose attached to Shandong automatic loading mixer to remove the sludge and concrete adhered to the vehicle body. On the way back to the mixing station, 150-200l water should be injected into the mixing drum to clean the concrete residue bonded by the cylinder wall and blades.

　　2、每天工作結束后，司機應負責向山東自動上料攪拌車攪拌筒內注入清水并高速(14—18轉/分)旋轉5—10分鐘，然后將水排去，以保證筒內清潔。用高壓水清洗攪拌筒各個部分時，應注意避開儀表及操縱桿等部位。壓力水噴嘴與車身油漆表面間的距離不得小于40厘米。

　　2. At the end of each day's work, the driver should be responsible for injecting fresh water into the mixing drum of Shandong automatic feeding mixer, rotate it at high speed (14-18 RPM) for 5-10 minutes, and then drain the water to ensure the cleanness of the drum. When cleaning each part of the mixing drum with high pressure water, pay attention to avoid the instrument and control rod. The distance between the pressure water nozzle and the paint surface of the vehicle body shall not be less than 40 cm.

　　3、攪拌筒內外積污及殘存的混凝土渣塊時，以及在機修人員進入筒內進行檢修和焊補作業(yè)時，需先關閉山東自動上料攪拌車發(fā)動機，使攪拌筒完全停止轉動。在機修人員進入筒內工作期間，必須保證拌筒內通風良好，空氣新鮮，無可然氣體及有害灰塵，氧氣供應充足。在筒內使用電動工具操作時，操作人員必須有良好的絕緣保護。

　　3. When removing the dirt and residual concrete slag inside and outside the mixing drum, and when the machine maintenance personnel enter the cylinder for maintenance and welding repair, it is necessary to shut down the engine of Shandong automatic feeding mixer to stop the mixing drum completely. During the period when the machine maintenance personnel enter the cylinder, they must ensure that the mixing drum is well ventilated, the air is fresh, there is no natural gas and harmful dust, and the oxygen supply is sufficient. When using electric tools in the cylinder, the operator must have good insulation protection.

　　4、工作時，不得將手伸入旋轉的攪拌筒內，嚴禁將手伸入主卸料溜槽和加長卸料溜槽的連接部位。

　　4. When working, do not put your hand into the rotating mixing drum, and do not put your hand into the connection between the main discharge chute and the extended discharge chute.