Concrete mixing station screw conveyor maintenance program
Screw conveyor machine is mainly used for concrete mixing station transport cement, fly ash material, also used in chemical, metallurgy, granary processing, warehousing and other applicable screw conveyor place. It is an integral part of the concrete mixing station. So we have to pay attention to routine maintenance on it.
First, checked weekly gearbox 380v internal concrete vibrator operation, sealing, lubrication should be no abnormal noise, oil spills and other phenomena, fuel shortage should be added, but not exceeding the oil level line.
Second, once a month the whole coupling fastened condition.
Third, the internal transportation of materials, non-mixed hard bulk materials or foreign.
Fourth, the gear box first 100 hours of operation, needs a new lubricant, later changed every 1000 hours.
Fifth, the gearbox selection Mobil Gear629 # or Shell 150 # (Omala gear oil circulation).
The nature and type of concrete mixing station raw materials
Concrete mixing station, mixing concrete, while the material is made of concrete sand, stone, cement, slag and other components. So, they are what the nature of it?
Gravel generally called aggregates (also called aggregate), refers to it plays a role in concrete terms the skeleton. Coarse stone aggregate mean particle size greater than 5mm in mixing station, a particle surface concrete vibrator zb-15 size of not more than requested pebble 80mm, gravel particle size of not more than 60mm. Fine aggregate refers to the diameter of not more than 5mm of sand and gravel, mainly referring to the sand, usually divided into coarse sand, medium sand, fine sand and special sand, according to the fineness of the particle size specification analog to digital representation, from 0.7-3.7. General requirements for the particle size of aggregate gradation is better, that is some small heads, each able to fill the void. Thus, the formation of dense concrete, workability is good, not easy segregation during transport.
Cement is a hydraulic cementitious material, mainly from the cement in concrete action. Commonly used in civil engineering is a common cement. Concrete mixing station cement concrete mix in addition to the choice according to the characteristics of various cement outside, in an amount determined by the strength of the main indicators, reflecting the strength of cement in cement strength class (formerly known as labels). The intensity level is to use cement mortar test block 28d compressive strength tests obtained through the formation of such strength class 425 cement 28d strength is about 42.5Mpa. More than three months, and its strength to re-examine the date of shipment from the cement storage. The strength of the cement in concrete should be slightly higher than or equal to the strength of concrete, when the low strength of the concrete can be mixed with cement admixture to save. 6351 parts of concrete vibrator The maximum amount of each of the parties should not cement in concrete more than 550 kg. Drinking water in line with national standards, it can be used for the production of concrete. Other water through after inspection before use.