3results about How to "Improve offset" patented technology

This invention relates to the field of fireboat water pump installation technology, specifically to a method for installing a water-spraying propelled fireboat's water pump. The method includes: S1. Initially positioning the water inlet channel on the hull plate, allowing the outlet flange of the water inlet channel to extend into the pump chamber; S2. Placing a dummy pump fixture in the pump chamber, the dummy pump fixture including a dummy pump body, with dummy pump feet at the bottom of the dummy pump body. The dummy pump feet are first anchored to the outlet flange of the water inlet channel using locating pins, and then fixed with bolts; a dummy pump shaft, which is a round tube, is installed on the top of the dummy pump body; S3. Butt-welding the water inlet channel to the hull plate, monitoring the relative position changes of the dummy pump shaft and the steel wire in real time; S4. After welding the water inlet channel, marking the center line of the dummy pump shaft, disassembling the fixture from the outlet flange of the water inlet channel, replacing the fixture with the actual pump, and completing the water pump installation. This installation method avoids inaccurate positioning due to welding deformation of the water inlet channel causing the center line of the water inlet channel to shift, which in turn leads to the shift of the pump shaft center line, thus improving the positioning and alignment accuracy.

The utility model relates to the technical field of building construction, and discloses a template lifting device which comprises two template components which are sequentially arranged in the vertical direction, each template component is formed by connecting a plurality of templates end to end, and die cavities of the two template components are communicated and connected in a magnetic attraction mode. The device further comprises a frame body, a fixing assembly and a moving assembly, the frame body is arranged on the outer side of the formwork assembly, the fixing assembly is arranged on the frame body, and the moving assembly is movably arranged on the frame body in the vertical direction. The fixed assembly is detachably connected with the formwork assembly located on the upper portion, the movable assembly is detachably connected with the multiple formworks of the formwork assembly located on the lower portion, and after concrete in a die cavity of the formwork assembly located on the lower portion is poured and formed, the multiple formworks of the formwork assembly located on the lower portion can be driven by the movable assembly to move upwards; and therefore, the template assembly is positioned above the original template assembly. According to the formwork lifting device, the problems of shaking and deviation of the formwork in the lifting process can be effectively solved, the construction precision is improved, and the construction safety is guaranteed.

This invention relates to the field of seismic exploration technology, and particularly to a method and apparatus for AVO trend correction of pre-stack gathers for interlayered shale oil reservoirs. The method includes: constructing seismic wavefield amplitude and travel time equations based on the steady-phase principle; establishing illumination weight coefficient equations based on deconvolution imaging conditions according to the seismic wavefield amplitude and travel time equations; determining illumination weight coefficients using the equations based on the forward-modeled wavefield propagation amplitude, receiver amplitude, shot amplitude, travel time from imaging point to shot point, travel time from imaging point to receiver point, travel time from shot point to receiver point, and angular frequency; and using the illumination weight coefficients to perform amplitude illumination compensation on the pre-stack gather seismic data to obtain the pre-stack gather imaging results after AVO trend correction. This invention can improve the accuracy of AVO in pre-stack seismic gathers, thereby identifying sweet spots in interlayered shale reservoirs with optimal reservoir and production potential, improving the reliability of geological models, reducing the risk of blind drilling, and saving exploration costs.