In recent years,truck-mounted cranes have emerged as a new and significant type of special vehicle model. These powerful machines find extensive applications in a variety of settings, including factories, docks, engineering constructions, and many other places. Their versatility and practicality have led to a steadily increasing sales volume year by year. There are four distinct operation methods fortruck-mounted cranes, namely: lower operation, middle operation, high-altitude operation, and remote control operation. Each of these methods has its own unique characteristics, advantages, and disadvantages. Let’s explore them in detail.
Lower operation:
Lower operation is a method that generally allows people to operate while standing on the ground. The operating handle is typically installed between the rear of the cab and the cargo box. There are handles on both sides, providing convenience and flexibility for the operator. A remote throttle is installed next to the operating handle, which is extremely useful for facilitating the control of the lifting speed. This type of operation is mostly used for small-tonnage cranes.
Advantages:
One of the significant advantages of lower operation is its low maintenance cost. Since the operator is on the ground and the control mechanisms are relatively simple, there is less wear and tear on the equipment, resulting in reduced maintenance requirements and expenses.
Another advantage is that both sides of the vehicle can be operated. This flexibility is particularly beneficial when lifting goods at different positions. The operator can easily change the operation direction at any time, depending on the location of the load. This saves time and effort and increases the efficiency of the lifting process.
Moreover, being close to the lifted object is a distinct advantage. When performing small-scale lifting tasks, it is more convenient to hang the hook. The operator can have a clear view of the load and precisely position the hook, ensuring a safe and accurate lifting operation.
Disadvantages:
However, lower operation also has its drawbacks. Generally, the height from the cargo box to the ground is about 2 meters. This relatively low height can cause problems during operation. The line of sight is often blocked, making it difficult for the operator to accurately observe the surrounding situation. This can pose a safety risk, as the operator may not be aware of potential obstacles or hazards.
For example, imagine a small-tonnagetruck-mounted cranebeing used in a crowded factory yard. The operator is standing on the ground, trying to lift a load. Due to the limited line of sight, the operator may not notice a person or object approaching from the side, potentially leading to an accident.
Middle operation:
Middle operation involves installing an operating seat on the slewing platform of the crane. The structure is similar to that of high-altitude operation, except that the installation position is different. This method is mostly used on medium-sizedtruck-mounted cranes.
Advantages:
The main advantage of middle operation is its good field of vision and moderate height. The operator is positioned at a height that allows for a better view of the surrounding area compared to lower operation. This enables the operator to have a clearer understanding of the lifting environment and make more informed decisions.
Disadvantages:
Despite its advantages, middle operation also has some limitations. One of the main disadvantages is that it can only observe the surrounding situation from a fixed position. This lack of mobility can be a disadvantage in some situations where the operator needs to have a more comprehensive view of the entire work area.
Moreover, the usage rate of middle operation is not high. This is partly due to the fact that it needs to be customized, which can increase the cost and complexity of the crane. Additionally, the price is slightly higher than lower operation, which may make it less attractive for some users.
For instance, in a construction site where the work area is constantly changing, an operator using middle operation may find it difficult to keep track of all the activities. The fixed position of the operating seat can limit the operator’s ability to respond quickly to unexpected events.
High-altitude operation:
This operation method is to install an operating chair on the column of the crane. The seat can be adjusted to provide maximum comfort and visibility for the operator. Generally, there is a lifting parameter table next to the seat, allowing the operator to know the lifting situation at any time. It is equipped with a remote throttle to control the lifting speed. High-altitude operation is mostly used on medium and large cranes.
Advantages:
High-altitude operation offers several significant advantages. Firstly, the operator is positioned at a high altitude, providing a wide field of vision. This enables the operator to clearly observe the surrounding environment, ensuring the safety of lifting and protecting surrounding pedestrians and vehicles. The operator can see potential hazards from a distance and take appropriate measures to avoid accidents.
Moreover, large-tonnage cranes are often equipped with an electronic display instrument, allowing the operator to observe the lifting weight at any time. This is crucial for ensuring that the crane is not overloaded and for maintaining the stability and safety of the lifting operation.
Disadvantages:
However, high-altitude operation also has its challenges. One of the main disadvantages is that it needs to climb up and down through ladders, which can be troublesome and time-consuming. This not only affects the efficiency of the operation but also poses a safety risk, especially in adverse weather conditions or when the operator is in a hurry.
When lifting goods, two people need to cooperate in the operation. One person operates the crane while the other person directs. This requires good communication and coordination between the two individuals, which can be difficult in some situations. If there is a breakdown in communication or a misunderstanding, it can lead to accidents and delays.
For example, imagine a largetruck-mounted cranebeing used to lift a heavy load at a construction site. The operator has to climb up to the operating chair through a ladder, which can be a daunting task. Once in position, the operator relies on the person on the ground to provide directions. If there is a miscommunication or if the person on the ground is not visible due to obstacles, it can lead to mistakes and potential accidents.
Remote control operation:
Remote control operation controls the telescoping, slewing, luffing, and other actions of the boom through a wireless remote control. The remote control is small and portable, allowing the operator to carry it with them. In addition to the most basic operation buttons, the remote control is also equipped with a remote throttle, emergency stop button, and other useful features.
Advantages:
Remote control operation offers several distinct advantages. Firstly, it has a wide operation range. The operator can control the crane from a distance of up to 200 meters, providing greater flexibility and safety. This is particularly useful in situations where the operator needs to be at a safe distance from the crane or when there are obstacles between the operator and the crane.
Another advantage is its good safety. The operator can stand at a safe distance and observe the surrounding environment while controlling the crane. This reduces the risk of accidents caused by being too close to the crane or being hit by falling objects.
Moreover, one person can complete the entire lifting operation process, saving manpower and cost. There is no need for multiple people to coordinate and communicate, reducing the potential for errors and misunderstandings.
Disadvantages:
Despite its advantages, remote control operation also has some limitations. One of the main disadvantages is that wireless remote control can only control the boom and cannot control the hydraulic outriggers. This can be a problem in some situations where precise control of the outriggers is required for stability and safety.
On the other hand, the cost of wireless remote control is high, and the maintenance cost is also relatively high. Maintenance accessories may not be easy to find, which can lead to downtime and increased costs.
For instance, if a wireless remote control malfunctions, it may be difficult to find replacement parts quickly. This can delay the operation and cause inconvenience and financial losses.
In conclusion, each of the four operation methods oftruck-mounted cranes has its own unique characteristics, advantages, and disadvantages. The choice of operation method depends on various factors, such as the size of the crane, the nature of the lifting tasks, and the working environment. By understanding these factors and considering the pros and cons of each operation method, users can make an informed decision and choose the most suitable operation method for their specific needs.
