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74results about How to "Convenience and security" patented technology

Bicircle shield soil chamber residue soil flow characteristic visual observational experiment system and method

The invention discloses a bicircle shield soil chamber residue soil flow characteristic visual observational experiment system which comprises a model soil box, a reduced scale bicircle shield tunneling machine excavation system simulation test device, a uniformly distributed load loading device and a PIV digital image processing system, wherein the model soil box is filled with transparent soil and is connected with the uniformly distributed load loading device after the upper cover is dismantled; the end, provided with a partition board, of the model soil box is connected with the reduced scale bicircle shield tunneling machine excavation system simulation test device; lasers are arranged above and on the side face of the model soil box respectively; a CCD camera is adopted to acquire an image, controls image acquisition through connection with a computer, and analyzes image data. The invention further discloses a method for carrying out an observational experiment by adopting the bicircle shield soil chamber residue soil flow characteristic visual observational experiment system. With adoption of the bicircle shield soil chamber residue soil flow characteristic visual observational experiment system, a residue soil flow field of the soil chamber and a soil body displacement field in front of an excavation face can be effectively observed to provide an excellent test platform for the soil body improvement effect and setting and control of soil chamber pressure; in addition, the system is safe, convenient and rapid to dismantle, high in testing accuracy and recyclable.
Owner:TONGJI UNIV

Process for shipping and launching wharfboat by floating same on vertical quay wall with assistance of airbag

ActiveCN101537875AThe construction period is easy to guaranteeEasy qualitySlipwaysEngineeringAirbag
The invention relates to a process for shipping and launching a wharfboat which is carried by an airbag row. The launching process is a method adopting a water tractor tug for traction, a land post-tensioning device for protection, a land small-diameter airbag for floating support and displacement, and a water large-diameter airbag row for carrying. By adopting the process for launching the wharfboat, ships can be manufactured at a place close to a wharf or far away from the wharf, the construction time limit, the quality and the security can be ensured easily, and a light-tonnage hoisting apparatus can be used, and thus the ships can be moved to the wharf by a small-diameter airbag row and then carried into water by the large-diameter airbag row. The amount of corresponding airbags (land and water) according to the tonnages of the ships, the airbags can be reused, the investment is small, and compared with the prior shipbuilding and dock building cost that is hundreds of thousands yuan even several hundreds of thousands yuan, the cost by making use of the airbag for launching is only tens of thousands yuan, and thus the launching process does not use large hoisting apparatuses, is safe and reliable, is simple, convenient and practicable, and has low cost.
Owner:NO 2 ENG CO LTD OF CCCC FIRST HARBOR ENG

Leveling system of railway electrification working vehicle

The invention relates to a leveling system for a railway electrification operation vehicle, which comprises a main frame, a steering frame, and a pivoting support; a lifting upright post is provided with an operation platform and is hinged with the pivoting support which is fixedly arranged on the main frame; at least one adjustable extension piece is arranged between the lifting upright post and the pivoting support; one end of the adjustable extension piece is connected with the lifting upright post, while the other end is connected with the pivoting support; and at least one locking mechanism is arranged on the lifting upright post and the pivoting support. The leveling system solves the problem that the operation platform is declined due to superelevation of an outer rail when the railway electrification operation vehicle works in a curved section. The operation platform and the lifting upright post are connected and fixed into a whole; and by adjusting an inclination angle of the lifting upright post relative to a horizontal plane, the leveling system can actively adjust the inclination angle of the operation platform of the vehicle relative to the horizontal plane to remove deflection of the operation platform, and adjust the operation platform to a horizontal position so as to ensure safety and convenient work of operators.
Owner:GEMAC ENG MACHINERY

Special assembling trolley for wheel sets of cranes

The invention discloses a special assembling trolley for wheel sets of cranes, which comprises an assembly stand. A clamping mechanism used for clamping a wheel set is arranged on the upper surface of the assembly stand and consists of a movable clamping block, a fixed clamping block and a driving device, the fixed clamping block is fixedly disposed on the upper surface of the assembly stand, the driving device which is used for driving the movable clamping block to move in directions far away from and close to the fixed clamping block is arranged on the assembly stand, a trolley support frame is fixedly connected to the lower surface of the assembly stand, universal wheels are fixedly connected to the bottom of the support frame, and one end of each universal wheel is provided with a brake device for braking the trolley. The clamping mechanism on the assembly stand is favorable for vertically assembling the wheel set, various assembly dimensions can be adjusted conveniently and can be well guaranteed, simultaneously, safety is ensured, two sides of a bearing box of the wheel set can be assembled simultaneously, assembly working hours can be greatly reduced, and the trolley can be braked at an optional position by the aid of the braking devices, and is fine in safety performance.
Owner:HENAN WEIHUA HEAVY MACHINE
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