The Difference between Standard Arm and Extended Arm of Excavator
As we all know, the excavation radius of the original excavator is proportional to the tonnage, that is to say, under normal factory conditions, the excavation radius of the large tonnage excavator is certainly larger than that of the small tonnage excavator. But under some conditions, even the large forearm of standard large tonnage excavator can not reach the excavation radius. For example, when people sit down to eat, their hands are not long enough, so they are called chopsticks. Therefore, when they face the working conditions of demolishing buildings and digging ditches, ordinary excavators are often not competent. Therefore, a special kind of equipment comes down from the sky.
Extended arm excavator
Firstly, the definition of the excavator's elongated arm is a set of front-end working device designed and manufactured to expand the scope of excavator's work and meet the requirements of working conditions. Connecting parts must strictly conform to the connecting dimensions of the original excavator in order to facilitate the installation and use of equipment. The lengthening arm of excavator can be roughly divided into two kinds: the lengthening arm of building demolition machine and the lengthening arm of deep foundation pit. The lengthened arms produced by auxiliary factories are generally 15 meters, 18 meters, 20 meters, 22 meters, 24 meters, 26 meters, 28 meters, etc., and are analogized by tonnage.
Extended arm excavator
As we all know, just because of the special modification, the manufacturer who chooses to buy the excavator's elongated arm should consider these seven points.
1时要考虑购买挖掘机的长臂及其匹配的现有设备,包括挖掘机扩展的操作效率和现有设备匹配的效率,如小延长臂挖掘机价格较低,但随着大跳过不匹配,相当于“小马拉的车”,“大马拉的车”同时也不匹配。在施工实践中，有一个被许多施工管理者所接受的经验公式，即液压加长臂挖掘机与自卸车的最佳配合应为每次开挖5-7斗满载自卸车。计算公式为:q= q /(5-7)r(其中:q——加长臂挖掘机斗容，m3;Q——自卸车载重量，T;R——开挖材料的容重;T / m3)
1. Consider buying the long arm of the excavator and its matching existing equipment, including the operating efficiency of the expansion of the excavator and the matching efficiency of the existing equipment, such as the lower price of the small arm excavator, but with the big jump mismatch, it is equivalent to the "small horse car" and the "big horse car" also mismatch. In construction practice, there is an empirical formula accepted by many construction managers, that is, the optimum cooperation between hydraulic elongated arm excavator and dump truck should be 5-7 buckets full load dump truck per excavation. The calculation formulas are q= q/(5-7) R (where Q - bucket capacity of extended arm excavator, m3; Q - dump truck load, T; R - volume weight of excavation material; T/m3).
2. Users are now aware of the benefits of buying an extended arm of a excavator. If the project is received, the cost will be recovered soon and the company will take effect immediately. However, due to the large investment, we should consider carefully when choosing the manufacturer. Although the price is important, the quality and after-sales service period are more important. It is suggested that the majority of customers should have a look before buying. Don't delay the project for its low cost and poor quality. It will cost a lot. According to the situation of excavators, the manufacturer must have a perfect service system, including a national service, spare parts supply, service system outside the factorial warranty period and maintenance service, etc., in order to meet the needs of construction units or individuals after purchasing equipment maintenance and maintenance. If the service of the manufacturer is not guaranteed, don't choose this kind of equipment even if the performance of the machine is good, otherwise, it will bring a lot of trouble to the users.
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