2 results about "Common Duct" patented technology

This invention relates to a simulation test method for grouting of prestressed concrete bridge ducts, characterized by the following specific test steps: S1: Test design; S2: Equipment and material preparation; S3: Test commencement. This method addresses the problem that common duct grouting construction techniques, processes, and requirements cannot meet the needs of new grouting materials and equipment, such as "grouting from the lowest point." Some construction techniques have theoretical flaws, such as "flushing the duct before grouting and blowing away accumulated water with high-pressure air," and some lack reliable theoretical and practical basis. Therefore, it is necessary to study the influencing factors of duct grouting construction techniques based on current grouting materials, summarize the main factors affecting duct grouting quality, and propose an operable grouting process method.

The application discloses a detachable suction plug device, which comprises a suction plug head and a pushing structure. The suction plug head comprises a suction plug proximal end arranged near the end of the pushing structure and a suction plug distal end with radial expansion performance. The suction plug distal end is an elastic structure. The outer diameter of the suction plug distal end after radial expansion is larger than the diameter of the suction plug proximal end. After radial expansion, the suction plug head is funnel-shaped with the diameter gradually decreasing from the suction plug distal end to the suction plug proximal end. The distal end of the pushing structure is not fixedly connected with the suction plug proximal end or is connected with the suction plug proximal end through a releasable structure. The suction plug head is internally provided with a suction plug cavity which is arranged in the axial direction. The suction plug head can be matched with a common catheter to realize the function of sucking and taking out the plug. The suction plug head can be directly arranged at the distal end of the catheter, so as to be combined with the catheter as a suction device. The suction device can be directly sucked through the catheter, the use is limited, the catheter cavity is less occupied while having a larger diameter, and a larger suction plug efficiency can be realized.