Do you know what conditions are required for the use of small concrete mixer? First, let's talk about whether the driver's license of small concrete mixer is required. B2 certificate is required to drive a concrete mixer. If you have a work permit, you can go to the place where your driving permit is located!
Concrete mixer truck is a kind of vehicle. Not all drivers who can drive will drive concrete mixer truck. If it is not operated properly, it will cause rollover, excessive wear of hydraulic pump, motor and reducer, and even serious consequences.
Before starting the small mixer, put the operating handle of the mixing drum at the "stop" position. After starting the engine of the concrete mixer truck, the mixing drum shall rotate at low speed for about 10 minutes to raise the hydraulic oil temperature to more than 20 ℃.
When the concrete mixer truck is parked in the open air, the mixing drum shall be reversed before loading to discharge the ponding and sundries, so as to ensure the quality of concrete. When transporting concrete, the concrete mixer shall ensure that the sliding bucket is firmly placed to prevent swinging due to looseness, injuring pedestrians or affecting the normal operation of other vehicles.
When the small soil mixer truck loads the mixed concrete, the speed of the mixing drum is 2-10 R / min. during transportation, the speed of the mixing drum on the flat road shall be 2-3 R / min. when driving on the road with a roll gradient greater than 50 or the road with large shaking left and right, the mixing and rotation shall be stopped, and the mixing and rotation shall be resumed after the road conditions improve.
The concrete mixing time of the mixer truck shall not exceed the time specified in the mixing plant. During the transportation of concrete, the mixing drum shall not stop for a long time to prevent segregation of concrete. The driver shall always observe the concrete condition, timely report any abnormality to the dispatching room and apply for handling. When the mixer truck is loaded with concrete, the standstill time on the site shall not exceed 1 hour. In case of overtime, the person in charge of the site shall be required to deal with it in time.
The slump of concrete transported by mixer truck shall not be less than 8cm. The concrete shall not be discharged for more than 2 hours when the temperature is high, and not more than 2.5 hours when the temperature is low in cloudy and rainy weather. Before discharging concrete, the mixer shall rotate the mixing drum at the speed of 10-12 rpm for 1 minute before discharging.