The cylinder of concrete mixer truck is a component of working volume with piston. The function of cylinder is to convert the pressure energy of compressed air into mechanical energy, and the driving mechanism performs linear reciprocating motion, swing and rotation motion. So how to prevent the cylinder from cracking.

　　一、预防混凝土搅拌车汽缸破裂的方法

　　1、 Methods of preventing cylinder cracking of concrete mixer truck导致小型混凝土搅拌车缸破的因素很多，要预防气缸破裂，应该做到：发动机温度过高时，必须等发动机温度降低后，再加水发动，不得先起动发动机，后加冷却水，以免使气缸崩裂；在严寒条件下车，须放净冷却水，起动车时更好加热水起动，冬季停车若时间较长，又不能放水时，可间歇发动车辆，保持发动机有一定温度而不致于结冰，不得用喷灯或明火直接烤车，同时使用的冷却水要洁净。

　　There are many factors leading to cylinder breakage of small concrete mixer truck. To prevent cylinder rupture, we should do: when the engine temperature is too high, we must wait for the engine temperature to reduce, then add water to start, do not start the engine first, and then add cooling water, so as to avoid cylinder cracking; when getting off the train in severe cold conditions, it is better to start the motor car with heated water and stop in winter if the time is too long When it is too long and water cannot be drained, the vehicle can be started intermittently to keep the engine at a certain temperature without freezing. It is not allowed to bake the car directly with blowtorch or open fire. At the same time, the cooling water used should be clean.
            

　　混凝土搅拌车如果缸套出现破损，发动机在进气行程时会吸入冷却液，而在压缩行程和做功行程时高压气体又会从破损处进入冷却水道。无论出现哪一种情况，都将妨碍可燃混合气的形成和燃烧，甚使发动机无法正常工作，将严重影响发动机的使用寿命。

　　If the cylinder liner of the concrete mixer is damaged, the engine will inhale coolant during the intake stroke, and the high-pressure gas will enter the cooling channel from the damaged part during the compression stroke and power stroke. No matter what kind of situation appears, it will hinder the formation and combustion of combustible mixture, and even make the engine unable to work normally, which will seriously affect the service life of the engine.

　　二、混凝土搅拌车汽缸裂损的检查方法

　　2、 Inspection method of concrete mixer cylinder crack水泥搅拌车汽缸体裂损一般发生在水套或其他壁厚较薄的部位，明显的汽缸体裂损可用目视或五倍放大镜检查出来，细小的汽缸体裂损可通过水压或所压实验检查。

　　The cylinder block crack of cement mixer truck usually occurs in water jacket or other parts with thin wall thickness. Obvious cylinder block crack can be detected by visual inspection or five times magnifying glass. Small cylinder block crack can be inspected by water pressure or pressure test.

　　水压实验或气压实验的压力为0.3-0.4MPA，水压实验时，将汽缸体，汽缸垫和汽缸盖安装好，密封水套的出水口，然后从水套进水口将水压入，检查漏水部位，即为汽缸体裂损部位，气压实验与水压实验办法相似，将压缩空气入汽缸体水套后，将汽缸体放入水池或在汽缸体表面途遍肥皂水，检查冒泡的部位，即为汽缸体裂损部位，检查出汽缸体裂损部位后，应做好符号，以便修补。

　　The pressure of water pressure test or air pressure test is 0.3-0.4mpa. During hydraulic test, the cylinder block, cylinder gasket and cylinder cover shall be installed, and the water outlet of water jacket shall be sealed. Then, the water pressure shall be injected into the water inlet of water jacket to check the water leakage part, that is, the cracked part of cylinder block. The method of air pressure test is similar to that of hydraulic test. After the compressed air is put into the water jacket of cylinder block, the cylinder block is put into the pool or water tank Apply soapy water on the surface of the cylinder block, and check the bubbling part, that is, the cracked part of the cylinder block. After checking the cracked part of the cylinder block, the symbol should be made for repairing.