2results about How to "Reduce perfusion" patented technology

This invention discloses a grouting repair device and method for defects in brick gas ducts. The repair device includes a tee pipe, a grouting pipeline, a grouting mechanism, a drain valve, and a grouting connector. The grouting connector has an internal connecting pipe, which is connected to a long grouting pipe. This grouting repair device can repair defects such as fractures, cracks, and breaks in brick gas ducts, especially defects whose specific locations cannot be determined. During use, this grouting repair device does not require prior detection of the defect location, allowing for direct blind repair without worrying about missing any defects. It is not limited by the number and size of defects in the brick gas duct, resulting in high repair efficiency and good effect.

The application discloses a large-span photovoltaic support arranged on a steep collapsible loess mountain slope, and solves the problem of how to construct a support pile foundation system suitable for the collapsible loess mountain slope; a slope bottom PVC corrugated pipe pile is arranged at the slope bottom of the collapsible loess mountain slope (1), and a truss is hoisted on the slope bottom corrugated pipe pile, a middle pile foundation and the slope top corrugated pipe pile; the lower end of the truss is connected to a first triangular connecting piece (9), the upper end of the truss is connected to a second triangular connecting piece (16), and a middle triangular connecting piece (22) is connected to a large-span photovoltaic support body (24) through two clamping plates (23); X-shaped arrangement of a cable-stayed anchor cable is arranged between two adjacent trusses, and an inclined cable-stayed anchor cable is arranged between each pile foundation and the top end of the truss opposite to the foundation; and the X-shaped arrangement of the cable-stayed anchor cable and the inclined cable-stayed anchor cable enable the whole large-width support to form a stable box frame structure.