3results about How to "Avoid compression set" patented technology

This utility model provides a liquid hydrogen atmospheric pressure storage tank, comprising: an inner tank for storing liquid hydrogen; an intermediate tank disposed outside the inner tank; a first gap between the inner wall of the intermediate tank and the outer wall of the inner tank forming a first cold-insulating space; the first cold-insulating space being filled with a first heat-insulating material; an outer tank disposed outside the intermediate tank; a second gap between the inner wall of the outer tank and the outer wall of the intermediate tank forming a second cold-insulating space; the second cold-insulating space being filled with a second heat-insulating material; a first gas filling pipe connected to the first cold-insulating space, continuously supplying a first heat-insulating gas into the first cold-insulating space to make the pressure in the first cold-insulating space greater than the pressure in the second cold-insulating space; and a second gas filling pipe connected to the second cold-insulating space, continuously supplying a second heat-insulating gas into the second cold-insulating space to create a slight positive pressure in the second cold-insulating space relative to the external environment outside the outer tank. The liquid hydrogen atmospheric pressure storage tank of this application has a short manufacturing cycle and is suitable for storing large volumes of liquid hydrogen.

The utility model belongs to building technical field especially a double -deck steel frame floating construction vibration isolation and noise reduction equipment, to the single elastic layer damping performance of current floating construction and the problem that floating construction needs to measure and secondary cutting material, present the following scheme, including the protective fence, fixedly connected in the floor top, four baffle, along the protective fence inboard circumference fixedly connected, two ends of four baffle all are equipped with T type guide rail and T type slot matched with T type guide rail, in the utility model, through the cross type rubber block high damping of sound insulation cotton block pressure absorption low -frequency vibration energy, simultaneously by rubber pad and the multiple sandwich of polyurethane layer constitute the circular hole of polyurethane layer surface and set up and excite sound wave vortex effect dissipation high -frequency energy, thereby, solve the broadband vibration isolation failure problem of traditional elastic layer damping single -faced and the baffle prefabricated T type interface complete quick insertion, internally lay sound insulation cotton block and fill sealant and reduce construction difficulty.

The application discloses a method for preventing compression deformation of high-thickness large-curvature pre-impregnated honeycomb preforming, which comprises the following steps: according to the thickness of the pre-impregnated honeycomb to be preformed and the specification of the honeycomb core, a rubber support is designed and prepared, and the rubber support is filled into the honeycomb core at the position where the pre-impregnated honeycomb has large curvature and is prone to compression deformation; then, the pre-impregnated honeycomb filled with the rubber support is laid on a large-curvature preforming tool, and after being packaged, vacuumized and pre-pressed, the pre-impregnated honeycomb is sent into a hot pressing tank for curing and forming, and a large-curvature honeycomb preformed body with good quality can be obtained after demolding. The method is very simple in operation process, the rubber support material can be repeatedly used after being prepared, and can be applied to the preforming of other complex curved surface pre-impregnated honeycomb, has wide application range, and has very good practical value and popularization value.