If you’re looking for versatile equipment that can help you with various tasks, mini excavators may be perfect for you; they can handle everything from digging trenches to moving soil. In this blog post, we’ll look at what kind of jobs a mini excavator can do.
What is a mini-excavator, and what can it do?
Mini excavators are small, compact construction equipment that You can use for various tasks. Mini excavators are often used for smaller projects like digging trenches or moving soil. They are also helpful for landscape and gardening tasks. Small excavators are mainly used to complete the following tasks:
① Excavation of the foundations of buildings and workshops;
② excavate the soil and strip the covering layer of the mining field;
③ Loading operations in quarries, tunnels, underground powerhouses and stockpiles;
④ excavation of channels, canals and dredging of waterways;
⑤ After replacing the working device, you can carry out the operations such as pouring, lifting, installation, piling, and ramming.
There are many classification methods for small excavators. Only five types are introduced below, namely, the form of the walking device, the transmission mode, the state of the working machine, and the driving mode and according to the purpose.
①Classified according to the form of walking device: there are two types: crawler type and tire type. Crawler-type small excavators have little grounding specific pressure, low centre of gravity, and good stability and are the most widely used. The tire-type mini excavator has fast walking speed and good manoeuvrability.
②Classified by transmission mode: there are two types: mechanical type and hydraulic type. Mechanical single-bucket small excavators rely on automatic transmission and require various gearboxes, winches, wire ropes, hooks, pulleys and other parts, and have a complex structure. They have been gradually eliminated in small and medium-sized single-bucket small excavators. The hydraulic single-bucket small excavator saves many complex mechanical intermediate transmission parts, simplifies the structure, improves transmission performance, works smoothly, operates flexibly, and has high productivity.
③ According to the form of the working device: there is a backhoe, front shovel, grab a shovel, dragline and other states. When the backhoe is digging toward the fuselage, it is used to excavate the soil below the stop surface. It is flexible in work and used more. It is the main form of working device in small hydraulic excavators. ④Classified by driving mode: there are two types of internal combustion engine-driven small excavators and electric driven small excavators. Electric mini excavators are mainly used in plateau hypoxia, underground mines and other flammable and explosive places.
⑤ Classification by use: Small excavators can be divided into general small excavators, mining small excavators, small marine excavators, special small excavators and other different categories.
How to use a mini excavator?
Small excavators have become an indispensable part of construction because of their wide application range, muscular flexibility, and convenient transportation. So how should small excavators be operated and used, and what should be paid attention to during use?
(1) Operational technology
First, check the surrounding conditions. During slewing operation, be aware of the surrounding obstacles and terrain, and operate safely; during the process, confirm the front and rear directions of the crawler to avoid overturning or collision; try not to face the final drive in the direction of excavation. Otherwise, it is easy to damage the walking Motor or hose; during operation, it is necessary to ensure that the left and right tracks are in complete contact with the ground to improve the dynamic stability of the whole machine.
(2) Effective mining methods
When the bucket cylinder and the connecting rod, the stick cylinder and the stick are at 90 degrees to each other, the digging force is significant; when the bucket teeth and the ground maintain an angle of 30 degrees, the digging staff is good, that is, the soil cutting resistance is minor; using the stick When excavating, ensure that the angle of the post is between 45 degrees in the front and 30 degrees in the back. Using the boom and bucket simultaneously can improve the digging efficiency.
(3) Digging rocks
Excavating rocks with a bucket will cause significant damage to the machine and should be avoided as much as possible; when it is necessary to mine, the position of the body should be adjusted according to the crack direction of the rock so that You can shovel in the bucket smoothly for excavation; insert the bucket teeth into the cracks in the stone In the middle, use the digging force of the stick and the bucket to excavate (pay attention to the slippage of the bucket teeth); if the rock is not broken, it should be cracked first and then excavated with the bucket.
(4) Slope levelling operation
When carrying out plane trimming, the machine should be placed flat on the ground to prevent the body from shaking. It is essential to grasp the coordination of the boom and stick movements, and controlling the speed of the two is very important for plane trimming.
(5) Loading operation
The body should be in a horizontal and stable position; otherwise, it will be difficult to control the rotation and unload accurately, thus prolonging the working cycle time; the body and the truck should maintain an appropriate distance to prevent the tail of the body from colliding with the truck when turning 180 degrees; It has a wide field of vision and high work efficiency. At the same time, it is necessary to correctly grasp the rotation angle to reduce the time for turning; the position of the truck is lower than that of the excavator to shorten the lifting time of the boom and have a good line of sight; Then place large rocks, which can reduce the impact on the car box.
(6) Working in soft areas or water
When working in soft soil areas, you should know the degree of soil loosening and pay attention to limiting the excavation range of the bucket to prevent accidents such as landslides and landslides and the deep subsidence of the car body. When working in water, pay attention to the allowable water depth range of the car body (the water surface should be below the centre of the carrier wheel); if the water level is high, it will poorly lubricate the inside of the slewing bearing due to the entry of water, and it will damage the engine fan blades due to water hitting: damage, electrical circuit components short circuit or open circuit due to water intrusion.
(7) Hoisting operation
When using a hydraulic excavator for hoisting operation, you should confirm the surrounding conditions of the hoisting site, you should use high-strength hoisting hooks and wire ropes, and you should use special hoisting devices as far as possible during hoisting; you should select the operation mode in the micro-operation mode, and the movements should be slow and balanced; Appropriate length, too long will make the hanging object swing wildly, and it is difficult to control accurately; you should adjust the position of the bucket correctly to prevent the steel wire rope from slipping off; the construction personnel should try not to get close to the hanging object to prevent danger due to improper operation.
(8) Smooth operation method
During operation, the stability of the machine can not only improve the work efficiency and prolong the life of the device but also ensure the safety of operation (put the machine on flat ground); the driving sprocket is more stable on the rear side than on the front side, and It can prevent the final drive from being hit by external forces; the wheelbase of the crawler on the ground is always more significant than the wheelbase, so the forward working stability is good, and you should avoid lateral operation as much as possible; you should keep the digging point close to the machine to improve the strength and the excavator. ; If the excavation point is far away from the engine, the operation will be unstable due to the forward movement of the centre of gravity; the lateral excavation is less stable than the forward excavation. Suppose the excavation point is far away from the centre of the machine body. In that case, the machine will be more unstable, so the excavation point and the centre of the machine body should be kept an appropriate distance for a balanced and efficient operation.
(9) Correct walking operation
When the excavator is walking, the working device should be put away as close as possible to the body’s centre to maintain stability; you should place the final drive behind to protect the last industry. Avoid driving over obstacles such as tree stumps and rocks as much as possible to prevent the track from twisting; if you must go over an obstacle, make sure that the centre of the way is on the block. When passing the mound, always use the working device to support the chassis to prevent the vehicle body from shaking violently or tipping over. Stopping the engine on a steep slope for a long time at idling speed should be avoided, otherwise, it will cause poor lubrication due to the change of the oil level angle. Long-distance travel of the machine will cause high temperature inside the roller and final drive due to long-time rotation, resulting in lower oil viscosity and poor lubrication. Therefore, it should be shut down frequently to cool down and prolong the life of the lower body. It is forbidden to carry out excavation operations by the driving force of walking, otherwise the excessive load will cause early wear or damage of the final drive, crawler and other lower parts. When walking uphill, the drive wheel should be behind to increase the adhesion of the track on the ground. When walking downhill, the driving wheel should be in front, and the upper track should be tightened to prevent the car body from sliding forward under the action of gravity and causing danger when parking. When walking on the slope, the working device should be placed in the front to ensure safety. After parking, gently insert the bucket into the ground and put the block under the track. When turning on a steep slope, slow down the speed, turn the left track backward when turning left, and turn the right track backward when turning right, which can reduce the danger when turning on a slope.
What are the benefits of using a mini excavator?
Small excavators have unique advantages due to their low price, light weight and convenient maintenance. Due to its small size, flexibility, multi-function and high efficiency, it is very popular with users. The small excavator is small in size and flexible in maneuverability, and is very suitable for various pipeline excavation, foundation construction, public utilities and house maintenance in the urban reconstruction that is vigorously supported by the state. The compact size and special design of small excavators enable them to work in environments where large excavators cannot construct.
The versatility of a mini excavator. The real advantage of the mini excavator is its versatility. Due to the associated hydraulic power system, the mini excavator can be installed with many auxiliary work tools, such as installation of rollers, plate compactors for landfill compaction of trenches; installation of breakers , Hydraulic pliers are used for lightweight demolition operations; rotary drilling tools are installed for drilling holes, and fishing hooks are used for lifting heavy objects; wood grabbers are installed to turn into wood grabbers for light, reliable, and labor-saving loading and unloading of wood and other goods. . Small excavators have great advantages in cost performance, low investment, fast return, economical and practical, and very competitive. At the same time, labor costs in economically developed cities are relatively high, and labor is replaced by machinery, which improves labor efficiency, and small excavators are more suitable for use in cities with limited space. This determines the advent of the era of rapid development of small excavators, with attractive market prospects and huge potential.
How to buy excavators from China?
If you’re in the market for an excavator, you’re probably wondering where to buy it. Buying excavators from China is a great option for a number of reasons: they are generally cheaper than North American models, there are plenty of options, and the buying process is relatively straightforward, and we’ll walk you through the process of buying an excavator from China.
When it comes to buying a mini excavator from China, there are a few things you need to keep in mind. First, make sure you know what you’re looking for, there are many different types of mini excavators, so be sure to research which one is best for your needs, and once you’ve settled on the model you want, it’s time to start looking for a supplier.
There are several ways to find excavator suppliers in China. One way is to search online directories like Alibaba or Global Sources, these sites list hundreds of different suppliers, so be sure to take the time and look at a few before making a decision. Another option is to attend a trade show in China, which is a great way to meet potential suppliers face-to-face and gain a better understanding of their products and services.
Once you’ve found a few potential suppliers, it’s time to start negotiating prices. When it comes to negotiating, remember that you have the upper hand; because there are so many suppliers in China, they will be competing for your business. So don’t be afraid to ask for discounts or extras like free shipping.
Finally, once you have an agreement with a supplier, it’s time to place an order. Be sure to confirm all details of your order before making any payments; this includes price, delivery date and any other special instructions. Once everything is confirmed, you can pay and sit back and wait for your new excavator to arrive.
As you can see, buying an excavator from China is a relatively simple process. By following the steps outlined in this blog post, you can be sure to find a good quality excavator at a great price. Therefore, if you are in the market to buy an excavator, do not hesitate to consider buying it from China.
Thanks for reading, and feel free to contact us if you have any questions!