I. Engineering demand analysis
1. Working condition characteristics Operating environment: detailed examination of the operating site. If the site is narrow and there are many obstacles, such as street reconstruction in the old city, indoor renovation and demolition and other scenarios, small excavator with its small and flexible body, can travel freely in the limited space, such as some mini excavators can pass through the narrow aisle, into the interior for crushing, digging and other operations. Ground conditions: If the construction ground is soft, such as in wetlands, swamp edges or sandy environments, wheeled excavators may get stuck in it, at this time the tracked excavator is a better choice.
2. Material type Soil type: If it is ordinary soil excavation, general small excavator can be competent. However, for sticky soil, such as heavy loam or clay, the excavator needs to have strong digging force and large bucket capacity to ensure that the soil can be effectively dug out and loaded into the transport vehicle.
3. Tasks Earthworks: For simple earthmoving, backfilling and levelling tasks, a small excavator of average performance will meet the requirements. For example, in small residential foundation excavation, park landscape modelling and other projects, these small excavators can be flexibly adjusted according to the different operating depth and width.
1. Power system Engine power: appropriate engine power is the key to ensure the normal operation of small excavators. If the power is too low, it will be unable to dig hard soil, rock or other high-intensity work, resulting in low efficiency; if the power is too high, it will cause energy waste and increase the cost of use. Fuel efficiency: from the perspective of long-term operating costs, small excavators with high fuel efficiency are more popular. This can be assessed by checking the fuel consumption indicators provided by the manufacturer and referring to the actual use experience of other users. Engine brand and quality: Engines of well-known brands are usually more secure in terms of reliability, durability and after-sales service.
2. Hydraulic system – pressure and flow: The pressure of the hydraulic system determines the digging force of the excavator, while the flow affects the working speed. Higher pressure ensures sufficient force when digging hard materials, while appropriate flow rate ensures smoothness of work movements and improves operational efficiency. – System stability: A stable hydraulic system can reduce the probability of failure and extend the service life of the machine. Understanding the brand, quality and user feedback of the hydraulic system will help to assess its stability.
3. Digging and loading capacity Bucket capacity: Choose the right bucket capacity according to the work demand. Smaller bucket capacity is suitable for fine work and small material handling, such as handling small amount of soil, sand and gravel in garden and landscape construction; larger bucket capacity is suitable for large-scale earthmoving projects, such as excavation of large building foundations. – Digging radius and height: these two parameters determine the working range of the small excavator. If there are obstacles in the working area or need to excavate within a certain range, you need to consider whether the digging radius and height to meet the requirements. Third, the size and weight and transport convenience 1. transport convenience Machine size: if you need to transport the small excavator frequently, especially on narrow roads or under low bridges, then the external dimensions of the small excavator is crucial. Ensure that the width, height and length of the machine are within the transport restrictions to avoid unnecessary hassle and increased transport costs. – Ease of disassembly: Some small excavators can be easily disassembled into several parts for transport and assembly at different job sites. This feature is very practical for users who need to transfer frequently.
2. Work stability Weight of the whole machine: Heavier small excavators generally have better stability, and are less likely to sway or tip over during the digging process due to their lack of weight. However, this will also affect the mobility of the machine and ease of transport, so it needs to be weighed according to the actual work situation.
Maintenance cost and after-sales service
1. Maintenance cost Component price: The price of components varies greatly among different brands and models of small excavators. When choosing, it is necessary to consider the price of commonly used parts, such as bucket teeth, filters, hydraulic oil pipes, etc. These parts are replaced more frequently, and the price is too high, which will increase the operating cost.
