Technology For The Development Of Soil

Construction Excavators – self-propelled earth-moving machines, designed to develop and move the soil in the dump or vehicles. Scope of application: device channels, ditches, trenches, road cuts, construction of embankments and dams, work in quarries. A distinctive feature of excavators digging in a group and excavation machines is their expertise in the development and movement of soil only in the work zone. The operations on the Transport of soil in the earthworks (embankments, dams, etc.) carry out specially for this kit in transport vehicles. Due to the fact that the development of the soil and transporting it made in parallel by different machines, excavators productivity is higher than the earth-moving machinery of comparable power.

The effectiveness of this technical solution requires evaluation, as it increases the set of machines, but it is high performance and reliability have made the most common excavators and machinery leading to the earthworks. Historically, the development of construction excavator always been directed at maximum compliance of its consumer properties of technical and technological characteristics of the earthworks. The excavator was one of the first earth-moving machines. Back in 1500 Leonardo da Vinci's drawings of machines developed for the digging of canals, which became the prototype excavator with grab grip and crane. Russia's first bucket excavator was built on the Izhora plant in 1811, its capacity was only 11 kW (15 hp). In 1902 Putilov was built for 32 steam excavator with bucket 2.29 m, and in 1905 the German company has released a steerable steam shovel, bucket of 4 m.

In the future, excavators began to use electric and diesel engines. Increased their power. In 1947 in Russia were built at Uralmash excavators with bucket 3 … 5 m, and in 1975 in the same factory made walking dragline excavator with bucket capacity of 100 m. In 1987, excavators Park building complex our country totaled 171.3 thousand cars. The running equipment is tracked excavators, walking, pneumatic wheel, motor and buoyant. Track and especially walking equipment used for high-power excavators, working mainly on large, concentrated objects with large amounts of excavation. Especially effective is the availability of a replacement of working equipment, which allows for flexible excavation technology. For example, the presence of removable bucket at working equipment backhoe: normal, narrow, and shaped trench allows us to develop various project profile with minimal intervals for the conversion. These features ultimately reflected in the annual replacement and performance vehicles, expanding the scope of their management. Even this classification is coarsened shows the wide possibilities of excavators and justify their massive use in construction. – information about excavators

Light Drills

Makita Power Tools from the company is not in vain is one of the best in its class, which is why I would like to conduct a small survey among the novelties of the perforators of the manufacturer and compare them to previous models. For comparison, we take the easy perforatoryperforatory HR 1830, HR 2450 (network) and 162 BHR, BHR 240 RFE – powered by batteries. And the most interesting thing is that, according to the manufacturer, the battery model does not concede to their fellows, operating on the network. Thus, the first and is marked advantage of new models is that they can use in places where there is no network, and reach extension is problematic. It is also important weight and power tools: for the previous models it was 1.7 kg. model HR 1830 and 2.4 kg. model HR 2450. Cordless news BHR BHR 162 and 240 RFE weigh a little more, but this is not a weight limit for the drills, working without a net.

Secret lies in the fact that the development of these tools use the new Li-ion type battery with a voltage of 18V, which significantly reduces the weight, rather than the battery with the "voltages" to 36V. Here, of course, possible to argue and counter insufficient capacity battery of new drills to 18V, but, according to the manufacturer, special advantages in feeding 36V not present, since significantly to the power of the device is not affected. This figure only increases the weight punch that you will agree, is not quite comfortable for work. Among other useful features of new models should be noted increase to maximum speed in a model BHR 162 to 1500 r / min, compared with HR 1830 – 1100, BHR 240 RFE – is for more complex operations, there is a hammer mode. A basic, quality of the above – without the possibility of using the network, they are certainly ahead of its earlier counterparts.