Research inside a crane cabin of bridge crane

Bridge crane is an important product in modern engineering machinery, which has been widely used at home and abroad. The bridge crane is mainly composed of cab and manipulator, the design of its structure is also very delicate, mainly in the structure to meet the following requirements: the cab of the bridge crane is the control center of the whole bridge crane, the cab should contain the crane control device function, control system and control components. To design a good cab, the crane should first be part of the system structure to coordinate the design and determine the structural requirements of the system and the role of institutions, and then according to the crane needs to choose the reasonable size and strength of the system institutions.” Car is the bridge” refers to the bridge crane cab structure of the automotive level degree. Then the following at home and abroad on the bridge crane cab to analyze when we have to pay attention to a number of issues are: first of all, the cab in the various functional devices are adapted to the bridge crane lifting capacity as well as operational requirements, followed by a variety of components in the crane cab whether to meet the design requirements, control accuracy and reliability and whether the relationship between the parts of the coordination is reasonable, the system in the crane operation whether the failure, etc.; again, the cab is the crane needs to choose the reasonable size and strength of each system. Failure, etc.; again is the cab of the system is able to realize the linkage control; finally is the cab between the internal systems are able to carry out the necessary coordination work.

First, the cab structure characteristics – research inside a crane cabin of bridge crane

At present, most of the overhead cranes in the domestic market are front and back door or side door structure, that is, the cab is behind the door, and the driver operates the equipment in the cab. Some are designed as independent maneuvering devices in the cab, some are designed as a combination of driver and control mechanism, and some have only one control panel or two control panels. The structural characteristics of different types of overhead crane cabs are different, some have cantilevered cabs, while others have flat car body structures. In addition, there is a new type of cab structure is the hydraulic cab, this cab is designed to meet the increasing need for lifting operations, this cab through the hydraulic lifting device to connect the main manipulator arm and lifting arm together, so that the main crane to produce movement to complete the work load. So that there are two joysticks in the cab, one is the lifting capacity joystick, the other is the lifting capacity signal joystick. The size of the force on the joystick is determined by the hook load-bearing structure; with the driver to cooperate with the moment generated by the main manipulator arm of the force on the decision; and the lifting arm and the main manipulator arm needs to have a large enough rigidity to buffer their own weight on the main hook of the impact of the role.

Second, whether the various functional devices in the cab to adapt to the bridge crane lifting capacity and operational requirements – research inside a crane cabin of bridge crane

As the bridge crane has a highly sensitive, strong lifting capacity and other characteristics, so in the choice of bridge crane cab according to the crane’s working characteristics of the design, first of all, to choose to meet the needs of the work of the cab structure; second is to choose to meet the working requirements of the joystick. In addition, when the use of new lifting devices, but also the use of reliable and safe operating devices and safety protection devices. In short, in the choice of control means, as far as possible, with a variety of functional devices lifting joystick or a variety of safety protection means of control to meet the work requirements. At the same time, theoretically speaking, the use of a variety of operational control means, you can achieve a variety of operational purposes, so it is necessary to design a variety of control systems in the cab according to the function of various functional devices in order to ensure that they carry out effective management and operational control.

Third, whether the various parts of the crane to meet the design requirements, control accuracy and reliability and whether the relationship between the components is reasonable – research inside a crane cabin of bridge crane

The bridge crane’s maneuvering system includes all kinds of parts, systems, instruments and so on in the cab. The operator can directly control each part of the cab through buttons. In order to ensure that the bridge crane can always maintain a reliable balance in operation, the hydraulic components and sensors must provide good oil pressure and air pressure. Due to the large number and complexity of parts inside the cab, complex structures can be used to increase stability and reduce weight without the need to analyze the entire system in a sophisticated way. The general crane maneuvering system includes: travel mechanism, electrical interlocking device, torque converter, and control components (including luffing switch, main controller, and main variable speed switch). Usually, in order to adapt to the bridge crane operation requirements, the hydraulic components should have a good service life; electrical interlocking device performance should be able to work reliably and have a certain degree of automatic protection, if the conditions allow, but also with the use of electronic control contact device or electrical connection signal processor (such as DC-ATA interface) and control components. At present, due to the bridge crane is the use of hydraulic components designed to operate the controller of this trend and the development of new products, so some foreign manufacturers have begun to study the use of other components for manipulation.

Other Precautions – research inside a crane cabin of bridge crane

The technical state parameters of various components in the cab of the overhead crane should be clearly specified in the relevant test protocols, so where the technical conditions allow, all components should be made to reach the design value as far as possible and reliable tests should be conducted to obtain the maximum benefit. In addition, when the crane breaks down during operation, it is important to be able to repair it quickly because it is related to the interests of the construction unit. So in this case we can reduce the occurrence of accidents through a variety of measures. For example, some crane cabs in the installation will choose a special bolt connection device for connection, which greatly reduces the equipment operation bolt loosening and jamming and other faults, while the number of bolts will also be reduced. In the selection of the number of bolts also need to be required for the quality and strength of the bolt to be fully considered and then selected. In addition, it is also necessary to carry out stress analysis for some important bolts (such as stress analysis method for bolt strength) to ensure that it can withstand the maximum effect that can be achieved by bearing a greater strength in the process of lifting operation. All structural components can be effectively fixed to the foundation only when they are loaded within the specified range.