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Excavator hydraulic quick change: master key suitable for many types of equipment
In today's construction machinery field, excavators are extremely common and important equipment. With the increasing complexity of various engineering tasks, the requirements for the diversity of excavator operation capabilities are also increasing. At this time, the excavator hydraulic quick change device came into being, it is like a master key, can be adapted to many types of equipment, for the efficient operation of the excavator has brought revolutionary changes.
The working principle of hydraulic quick change device
Excavator hydraulic quick change device, also known as quick connector, quick change joint, mainly by the main support, movable clamp block, hydraulic cylinder, pin and other parts. Its working principle is based on the pressure transmission of the hydraulic system. When the operator gives the command through the operation button in the cab, the hydraulic system will deliver the pressure oil to the hydraulic cylinder of the quick change device. The piston rod of the hydraulic cylinder extends or retracts under the action of the pressure oil, thus driving the movable clamping block to carry out the corresponding action. The movable clamping block can be quickly tightened or loosened with the preset connection parts on various fittings through a specific mechanical structure to complete the replacement process of fittings. For example, when replacing the bucket with a crushing hammer, the hydraulic cylinder pushes the movable clamp block to release the lock on the bucket, while adjusting the position to quickly clamp the connection part of the crushing hammer, and the whole process can be completed in a short time.
Suitable for a variety of accessories, expand the ability to work
Quick switching of earthmoving equipment
In earthmoving engineering, the common genera are standard bucket, large bucket, narrow bucket and so on. Traditionally, replacing these buckets takes a lot of time, and the staff not only has to use tools to remove the pin, but also needs multiple people to handle the equipment. With the hydraulic quick change device, this process becomes simple and fast. Taking a Kobelco excavator with a hydraulic quick change device as an example, it takes only tens of seconds to switch from a standard bucket to a narrow bucket suitable for digging narrow ditches. This greatly improves the flexibility of earthmoving operations, and the construction team can quickly replace the most appropriate bucket according to different excavation scenarios, such as ordinary site excavation, trench excavation, etc., to improve work efficiency. According to the relevant engineering data statistics, the use of hydraulic quick change device for earthmoving equipment switching can save about 20% of the working time in a medium-sized earthmoving project with a construction period of 3 months.
Fittings for demolition works should be replaced
Demolition projects require excavators with different accessories to complete various tasks. The hammer is used to break the concrete structure, the hydraulic shear can cut through metal materials such as steel bars, and the splitter is suitable for splitting the solid rock or concrete. In the process of demolition, due to the different structure and material of different parts, it is necessary to frequently change the fittings. The hydraulic quick change device plays a huge role here, and the operator can easily change these fittings quickly without leaving the cockpit. In the demolition project of urban high-rise buildings, it may be necessary to use a crushing hammer to break the wall first, and then use hydraulic shear to clean the steel bar. The traditional replacement method may take 15-20 minutes each replacement, while the hydraulic quick change device reduces the replacement time to less than 1 minute, greatly speeding up the progress of the demolition project.
Easy replacement of material handling equipment
In ports, mines and other places that require a large amount of material handling, excavators need to be equipped with clamps, suction cups and other accessories. The hydraulic quick change device makes it easy and efficient to change between the grab and other accessories. For example, in the loading and unloading of coal in the port, it is sometimes necessary to use a grab bucket to grab coal, and it needs to be replaced with a dodging plate when cleaning the site. The hydraulic quick change device can quickly complete the replacement of these two types of fittings, reduce the idle time of equipment, and improve the overall efficiency of material handling. Actual operating data show that in a port material handling operation with an annual throughput of 5 million tons, excavators equipped with hydraulic quick change devices can complete about 10% more handling per year than those not equipped.
The advantages of hydraulic quick change device are reflected
Significantly improve work efficiency
The most direct advantage of the hydraulic quick change device is that it greatly improves the efficiency of replacing the equipment of the excavator. Traditional replacement methods, such as the replacement of accessories such as the crushing hammer, often take more than 40 minutes in the past, and now with the help of the hydraulic quick change device, it can be completed in about 30 seconds. This means that in a day's working hours, the excavator can complete more different types of tasks, effectively shortening the duration of the entire project. In a municipal project with a tight schedule, due to the use of hydraulic quick change device, the project that was originally expected to be completed in 6 months was completed one month ahead of schedule, which gained precious time for the follow-up project.
Reduce labor cost and labor intensity
In the past, when replacing excavator accessories, multiple workers were needed to work together, and the labor intensity was large, such as using a strong hammer to knock the pin for disassembly and installation. The emergence of hydraulic quick change devices has changed this situation. The operator only needs to operate the button in the driver's room to complete the replacement of fittings, without the need for manual removal and installation of tedious work outside. This not only reduces the need for manpower, but also reduces the labor intensity of workers, and also reduces the safety risks caused by improper manual operation. Taking a construction team with 10 excavators as an example, after the use of hydraulic quick change devices, about 30% of labor costs can be saved every month.
Ensure operation safety
Hydraulic quick change devices are usually equipped with safety devices such as hydraulic control check valves and locking mechanisms. These safety devices provide effective protection for the fittings during installation and operation, even if the tubing breaks and other unexpected circumstances, the fittings will not fall. In some complex working environments, such as road construction in mountainous areas, safety issues are particularly important. The safety characteristics of the hydraulic quick change device can ensure that the accessories are always stably connected during the operation, avoid safety accidents caused by the accessories falling off, and provide a reliable guarantee for the safety of construction personnel and equipment.
Different types of hydraulic quick change device introduction
Universal hydraulic quick change device
Universal hydraulic quick change device is the most widely used type in the market. It is based on the two pin articulated structure when the standard bucket is installed at the end of the excavator bucket rod, to design the connection with the bucket rod, and the connection with the auxiliary machine is achieved by the pin or (fixed or movable) lock hook. By adjusting the center distance and diameter of the pin or lock hook on the quick change device, the connection with various functional devices can be realized to achieve a universal effect. This universal quick-change device can be used on hydraulic excavators with similar tonnage, bucket capacity and tool connection size produced by several manufacturers. For example, a general purpose hydraulic quick change device of a certain brand is suitable for a variety of models of 3-80 tonnage, and can be compatible with the common accessories on the market such as digging buckets, crushing hammers, and soil relivers, providing a convenient accessory replacement solution for the majority of excavator users.
Special hydraulic quick change device
The special hydraulic quick change device is tailored according to the tonnage and bucket capacity of some specific types of hydraulic excavators for a specific one or a series of tools. Its advantage is that the attached machine and the excavator bucket rod are directly connected, and the geometric relationship between the bucket rod and the attached machine need not be changed, so the working radius and digging force of the bucket and other performance parameters will not be greatly affected. However, its disadvantages are also more obvious, that is, the scope of application is limited, and it can only be applied to specific models and specifications of excavators and supporting accessories. For example, a special hydraulic quick change device customized by a large mining enterprise is only suitable for the specific type of excavator used by the enterprise, and the equipment specially designed for the mining operation of the mine, although it can play the best performance in the specific scenario, but it cannot be used on other different types of excavators.
Multifunctional hydraulic wrist (second generation quick change device)
The multi-functional hydraulic wrist belongs to the second generation of quick change device, which increases the freedom of movement such as rotation and swing on the basis of the first generation of quick change products. The device is mainly composed of a hydraulic (screw) adjusting swing device, a hydraulic cylinder, a full rotary device and a quick connector. Through the swing of the cylinder (or the rotation of the screw), the lateral swing of the machine can be achieved, and the left and right Angle can reach 40°; A hydraulic motor controlled by a solenoid valve drives the 360° rotating device below and drives the machine to rotate. This multi-functional hydraulic wrist integrates mechanical, electrical, hydraulic and control technologies to extend and extend the functions and operation range of the main engine. In some complex garden landscape construction, the excavator is required to accurately transplant and place the trees, and the multi-functional hydraulic wrist can make the equipped wood grabber realize multi-angle rotation and swing, and complete the tree transplanting operation more accurately, which is impossible to achieve with the traditional quick change device.
How to choose the right hydraulic quick change device
Select according to excavator model and tonnage
Different types and tonnage excavators have different working capacity and structural design, so it is necessary to match the corresponding specifications of the hydraulic quick change device. In general, small excavators (3-10 tons) due to their relatively small work intensity, you can choose a relatively simple structure and light weight hydraulic quick change device to ensure that the excavator's mobility is not affected by the premise of rapid replacement of accessories. Medium-sized excavators (10-30 tons) have a wide range of application scenarios, and the versatility and durability of hydraulic quick change devices are required to be higher, and products that can be adapted to a variety of accessories and made of high-strength materials should be selected. Large excavators (more than 30 tons) are usually used in large-scale engineering construction, large workload, need to be equipped with durable, strong bearing capacity of the hydraulic quick change device to ensure the reliability and stability under high intensity operation. For example, a 15-ton medium-sized excavator, when choosing a hydraulic quick change device, priority should be given to products suitable for 10-20 tons, and the device needs to have good versatility and strong structural strength.
Consider the operating environment and frequency of equipment replacement
If the working environment is harsh, such as in mines, construction sites and other places with large dust and strong vibration, the hydraulic quick change device with good dustproof and seismic performance should be selected. For scenarios with high replacement frequency, such as demolition and material handling, you need to select products that are easy to operate, fast to replace, and reliable. For example, in the frequent need to replace the bucket, crushing hammer, grab and other accessories in the urban demolition project, should choose a fully automatic hydraulic quick change device, which can quickly complete the replacement of accessories in the cab, and has a reliable safety locking mechanism, can meet the needs of high frequency replacement of accessories, while ensuring the safety of the operation.
Focus on product quality and brand reputation
Product quality is one of the key factors in the selection of hydraulic quick change equipment. High-quality hydraulic quick change devices are made of high-strength materials and have been subjected to strict quality testing, with good durability and stability. In the selection, you can refer to the brand reputation of the product, well-known brands usually have advantages in research and development, production process and after-sales service. For example, Kobelco brand quick change device adopts high strength manganese steel material and advanced structural integration mechanical design, durable, and equipped with hydraulic control check valve and mechanical lock safety device double safety design, safe and reliable, has a good reputation in the market. Choose a well-known brand of hydraulic quick change device, not only can obtain high-quality products, but also enjoy perfect after-sales service, to provide guarantee for the long-term stable operation of the equipment.
In short, the excavator hydraulic quick change device, as a master key suitable for many types of equipment, has brought a lot of convenience and advantages to the excavator operation. Whether it is to improve work efficiency, reduce costs, or ensure the safety of the operation, the hydraulic quick change device plays an important role. When selecting and using the hydraulic quick change device, fully understanding its working principle, type characteristics, and making reasonable selection according to actual needs will be able to make the excavator play a greater role in all kinds of engineering operations.
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