Mixing the concrete mixing station daily maintenance of the host

HZS series of concrete mixing plant mixing host is divided into FJS and JS two series. FJS series of mixing host shaft seal on the basis of the JS series to increase the pressure shaft end protection device, the shaft side of the protective layer from 3 to 4 layers, which makes the mixer work more stable and reliable operation.

Mixing the host maintenance is to restore its technical performance, to extend the useful life of the means. Improper maintenance will reduce reliability, reduce service life, and even cause mechanical accidents.
1. Requirements for the use of concrete raw materials
HZS series of concrete mixing station with double horizontal axis forced mixing host, can stir a variety of hard, fluid, plastic, lightweight aggregate concrete and mortar. Applicable aggregate size is not greater than 150 mm, of which the diameter of 120 ~ 150mm aggregate should not exceed 10% of the total capacity.
2. Mix the main cleaning and cleaning
The mixing unit should be cleaned at least once during one duty cycle. After the end of the daily production, the mixing of the host should be a comprehensive cleaning method is: in the cleaning process, the water and a little stone into the mixing console stirring 5 ~ 10 min, after cleaning the machine will be all the material removed, Water, material; stop and then flush the pipe, remove the mixing tank inside and outside the dust and adhesion of concrete. Under normal circumstances, JS1000 mixing host water about 150 ~ 180 kg or so, other models can be added or subtracted accordingly, but also self-contained high-pressure water gun to clean up.
In the washing and stirring the host material door, should avoid the upper part of the accumulation of foreign matter under the material stuck material phenomenon. During the mixing process, if the concrete truck is not in place for a long time (more than 20 to 30 min, especially in the summer), the mixer should be cleaned with water.
Normal production period, to regularly check the mixing cylinder and stirring the concrete on the solidification of the situation, if condensation should be promptly required to manually eradicate. Manual cleaning stirrer, you must cut off the power supply, gas, put the remaining gas, lock the control room; manual cleaning mixer, is strictly prohibited violent knock on the stirring shaft, stirring arm and stirring blades.
3. Maintenance of the gear unit
(1) oil use
Mixing machine reducer recommended oil: FJS series of gear oil Esso 150, Mobil 629; JS series of gear oil for the general gear oil. Reducer for the first time to run or replace the parts work after 100 ~ 150 h after the oil change, according to the use of lubricants and the quality of each operation can be 2 000 ~ 3 000 h oil change once; different types of lubricants can not be mixed; Check the oil level, if the amount of oil should be added in time.
(2) Precautions
Before starting the engine to check whether the oil level is reasonable, the air hole is blocked by dirt; if the ventilation hole is blocked, the reducer work due to increased pressure inside the cavity, easy to seal out, resulting in reducer leakage.
After the first run of the reducer for several hours should be detected after the shell temperature (should not exceed 70 ~ 75 ℃) and the reducer connecting bolts, universal joint bolts are fastened; mixer use the first week should be detected every day Detection.
When servicing the gear unit or the oil seal is squeezed out, replace the oil seal. Replacement should avoid the sealing lip and the original seal lip contact parts coincide; motor-driven reducer at least once a year to replace the oil seal.
If the reducer is idle for a long time, it should be filled with oil, re-use, and then release the excess oil to maintain the correct oil level.
4. Maintenance of the discharge mechanism
It is best to use LHM46 anti-wear hydraulic oil, and should be based on the use of oil to determine the cycle, it is generally recommended to replace the hydraulic oil every 6 months, and cleaning a fuel tank, oil filter, pipeline. Clean the hydraulic system when the environment must be clean, no dust and other pollution, or easy to cause hydraulic system failure, such as solenoid valves, hydraulic cylinder damage.
The system pressure should not exceed 12 MPa at the time of commissioning. If the pressure is too high, adjust the relief valve. The wear of the unloading door seal exceeds 1/2 and needs to be replaced. Use manual pump to open the door can not be too much force, so as not to damage the manual pump. After the manual operation is completed, the manual solenoid valve must also be turned to the middle of the handle, otherwise the automatic production state can not switch the discharge gate.