There are many kinds of construction machinery, generally speaking, construction machinery is excavator, loader and other common shovel equipment or crane equipment. And pavement engineering machinery equipment is very rare. Next we will understand and understand several pavement engineering machinery and equipment.
One, paver
The paving machine is a little familiar with most of the other pavement equipment, but the non professional personnel must have not done a thorough understanding. Some people may think that the paver is only used to spread the asphalt pavement, but in fact, there are many water stable layers that are also stall, and the water is also useful for the excavator or the excavator. The grader is flat, but the degree of compaction and the smoothness of the paver shop are better.
Below let us look at the construction of 31 DTU90SC paver, D6114ZG1B engine, 140KW, the whole machine weight 25 tons, paving width range of 3 meters --9 meters, paving thickness of 0--30 centimeters.
The engine leads three hydraulic pumps to provide power for the whole machine.
The motor is SAUER DANFOSS from Denmark.
Paver loading
The dump truck carries the water stabilizer (or bitumen) into the paver's hopper slowly, and the conveyor belt at the bottom of the hopper will send the mixture to the spiral blade. When the weather is hot, the side cover opens up to reveal the three members.
The material is pushed to both sides by a spiral blade, and finally molded through the ironing board (the ironing board is vibrating).
Paver work
The paver is operated by three people. The above is fully responsible, according to the control of the dump truck and the material in the hopper, and the foldable hopper after the dump truck. Of course, the other above can also be controlled. But because of the distance from the far line of sight, there are two people in charge of the operation.
The two sides of the spiral blade are driven by two motors, which can be controlled separately. When the paver works, the people at both ends of the ironing board operate the spiral blade according to the amount of the material, and adjust the width of the ironing board properly.
This is the controller at both ends of the ironing board. One side can control the rotation of the spiral blade and the width of the paving. On the one hand, the screw blade is controlled according to the quantity of the material. On the other hand, the distance from the paver to the roadside will vary in a small range, and the controller is adjusted by the controller. These two controllers are active. They are fixed at both ends when they work, and they are locked up in the cab when they get off duty.
Paver loading
After each vehicle is discharged, the hopper is folded to the middle, and the material on both sides of the hopper is conveyed to the middle conveyor belt. Workers help to collect the ground sprinkled, mainly to track the clean track to ensure that the paver travels smoothly, so as to ensure that the paving effect is smooth.
Alternator
In order to prevent asphalt oil from sticking to the iron plate when paving the asphalt pavement, it is necessary to electrically heat the iron plate, so there is a special motor with a generator for its power supply.
Paver work
The asphalt that has just been paved is "bubbling" with smoke, and the asphalt should still be at boiling point, standing on the edge like standing in front of a big fire basin.
Two, cold regeneration
Cold recycling is a strange thing. If you have participated in the BMW Exhibition for 12 years, you should know this artifact.
It is first to know about cold regeneration. Cold regeneration is the process of continuous milling and crushing of old pavement structure, adding regenerated material, mixing, spreading and rolling, and reforming a structural layer with a certain bearing capacity at normal temperature.
The following is a classic artifact of Wittgen -- cold regeneration of Wittgen WR2000XL.
This is today's protagonist, all imported goods, nameplate all English, a little hard to understand, probably to say to you, the front is the name of the equipment, machine number, production date (2012), model (WR2000), the back of the data are power (315), the quality of work (22.900), basic quality (22.300), the front axle Load (14.650), rear axle load (10550). The mixing width is 2 meters at a time, and the mixing depth can reach 50 cm, usually considering the problem of compaction, only mixing 20-30 centimeters. Engine is Mercedes Benz OM 460 LAAG3 six cylinder engine, power 315KW, fuel tank 900 liters, you can imagine how high fuel consumption.
The four wheel is independently driven by a separate hydraulic motor
The steering system is controlled by a steering cylinder and a tie rod for the front and rear wheels respectively. The front and rear wheels can steer separately or coordinate with each other. It is very flexible.
The pull rod is for the synchronous steering of the two front wheels.
The support of the four wheels can be lifted up and down to meet different working conditions, which is a special four independent suspension.
The tires are Trelleborg. For the first time, I asked the Niang to ask: the tires system is the world's leading supplier of tires and full wheel systems for forestry and agricultural machinery, forklift and other material handling vehicles.
Now let's take a look at its construction process:
When cold recycling is done, the water truck should be connected to the mixing material to add water.
One of these two cylinders is the control of the rear wheel steering, one is the control of the mixing depth.
The cylinder has a depth gauge, and of course the depth of the meter can be seen in the cab.
When working, the mixer shell is always on the ground, and the mixing wheel moves downward. From the picture you can see the change of the outside supporting arm when the mixing wheel moves up and down.
Finally, when visiting the cab, there are more buttons, which are electrically controlled, which is very labor-saving. The left armrest can be raised to make it convenient for people to go in and out.
Three, milling machine
Today, with the rapid development of construction machinery, the former Road excavator is missing, and the milling machine is replaced by it. Next we take the milling machine industry leader - - Wittgens W1900 as an example to study this road construction machinery of the big guy.
The effect is very beautiful, more smooth than the excavator, waste directly through the conveyor belt loading, waste can be used again, excavator excavated large block reuse is inconvenient, this is a milling machine advantage.
Nameplate, equipment does not seem to be very large, but the power is not small, 350KW, 25.4 tons of self weight.
The cab has only two pieces of glass and can be turned to the top. The big-name pavement equipment seems to be the cab is open, for some reason.
The two steering wheel requires two people to operate.
The front and rear two tracks, four small tracks look very solid feeling, each track with a pillar support, this is the legendary four-wheel independent suspension! The walking motor has no guard plate and is exposed. It may be the reason why the asphalt road does not go uphill. The hydraulic cylinder on the milling box looks very slim, but it should be enough. After all, it was designed by engineer matching.
The supporting wheels are almost next to each other. The steering can be different from that of the excavator.
This is driven by a hydraulic cylinder on the track of the column to drive the caterpillar steering, in order to make both sides of the caterpillar synchronous steering, but also with connecting rods to connect the two sides together. It is not clear how the two steering wheel is controlled. The two front tracks are connected by the connecting rod, and the two rear tracks are connected by the connecting rod. The two steering wheel should be the same, just for the convenience of operating at different angles.
The rear track steering mechanism is just like the front, but it doesn't have so many things behind it, it looks clear.
The pavement engineering occupies a great proportion in the construction of the project, and the road engineering machinery also has a very important position in the whole engineering machinery. It is believed that in the future, the pavement engineering machinery will be familiar with the excavators and loaders as well.
