Continuously develop of the road bridge construction,the derrick that requests the kit can satisfy it works to request,not only request to can carry out the most basic since heavy porterage request,but also the modern construction work more and more request it convenience,economic type,environmental protection.In order to adapt the demand that the large road bridge constucts the engineering,currently people at originally the foundation of the derrick up,carry on the research of various new derrick .
This design installs the process to the road bridge in the space knothole porterage work request,design a kind of new derrick - build a bridge the Dragon gate derrick of liquid press the system,build a bridge the Dragon gate derrick to mainly be constitute by four parts,namely:Rise to rise the organization,small garage to walk organization,change direction the organization and big garages to walk organization.Press the work form of the system according to demand and the whole liquids of these four work characteristicses with different organization,actual work conditions to these four systems and provide the oil system to carry on the design respectively.Pass carry on the system design calculation,standard piece to choose the type,not standard piece respectively to these four parts of design painting and liquid press the design of assist the piece with choose the type,complete the design of the whole system.