There are many kinds of problems with concrete mixers, such as engine problems, hydraulic system problems, circuit problems, operation valve problems, etc. concrete mixers give us an introduction to the problems that need to be paid attention to when they need to be repaired? The first thing to do is to cut off the power. Before the power is cut off, the incineration switch should be closed, and the electrical equipment, such as audio equipment, should also be closed. It is forbidden to cut off the power suddenly when the electrical equipment is running. The detailed power-off sequence is as follows: safety first, so in the maintenance time, the negative pole should be removed first, and then the positive pole. The time sequence of the device is opposite, the positive pole should be installed first, and then the negative pole.

為什么先斷負(fù)極呢？混凝土攪拌機(jī)在這里給我們解釋一下：

Why cut off the negative first? The concrete mixer is here to explain to us:

1. 先拆正極存在燒壞電器元件的風(fēng)險(xiǎn)，簡(jiǎn)單引起電腦板燒毀的丟失。在電路的實(shí)踐維修過程中因違反操作規(guī)程，損壞電路和把手燒傷的人很多，由于蓄電池正負(fù)極短路電流非常大，能瞬間產(chǎn)生高溫。

1. There is a risk of burning out electrical components by removing the positive electrode first, which will easily lead to the loss of computer board. In the process of practical maintenance of the circuit, there are many people who damage the circuit and burn the handle due to the violation of the operation rules. Because the short circuit current of the positive and negative electrodes of the battery is very large, it can produce high temperature instantly.
              

2. 假如先拔掉正極，因負(fù)極是搭鐵的，也便是正極周圍的金屬車體都是負(fù)極，假如用東西拆開正極接線時(shí)，東西碰到周圍的金屬車體，就會(huì)形成蓄電池正負(fù)極短路。

2. If the positive pole is pulled out first, because the negative pole is grounded, the metal car body around the positive pole is negative pole. If the thing touches the metal car body around when the positive pole wiring is disconnected, it will form a short circuit between the positive and negative poles of the battery.

3. 假如先拔掉負(fù)極，因負(fù)極周圍的金屬車體與負(fù)極是連通的，即便東西碰到也不會(huì)產(chǎn)生什么壞的結(jié)果，當(dāng)負(fù)極拔掉后已經(jīng)斷電，再去拔正極就不會(huì)有什么風(fēng)險(xiǎn)了。

3. If the negative pole is pulled out first, because the metal car body around the negative pole is connected with the negative pole, even if something touches it, it will not produce any bad results. When the negative pole is pulled out and the power has been cut off, there will be no risk to pull out the positive pole again.

混凝土攪拌機(jī)要留意一點(diǎn)：現(xiàn)行的攪拌車的蓄電池都是有總開關(guān)的，可是原來的都沒有，就欠好操作；并且假如是風(fēng)險(xiǎn)品運(yùn)輸車，比方油罐車，車上的行車記錄儀是不允許斷電的，斷電后行車記錄儀不能工作，車主或許就要承擔(dān)法律責(zé)任了，可是假如是風(fēng)險(xiǎn)品運(yùn)輸車，可以在車上放置一個(gè)供行車記錄儀的備用電源，這樣即便電路呈現(xiàn)毛病，也不于讓行車記錄儀斷電。

The concrete mixer should pay attention to the following points: the battery of the existing mixer has a master switch, but the original one does not, so it is not easy to operate; and if it is a risk goods transport vehicle, such as an oil tank vehicle, the vehicle's dash cam is not allowed to power off, and the car owner may have to bear legal responsibility if the power is off, but if it is a risk goods transport vehicle, the car's dash cam is not allowed to work Car, you can place a standby power supply for the dash cam in the car, so that even if the circuit is faulty, it will not power off the dash cam.