445results about How to "Improve leak resistance" patented technology

A cup-shaped receptacle has an outer bead in its opening area for clipping on a plastic lid, which has a circumferentially continuous clamping groove for receiving the bead. The clamping groove is continued outwards by an elastically deformable constriction, and inwards by an outer wall of a circumferentially continuous, U-shaped lid recess, whose U-web of is situated below the height position of the constriction and whose inner leg wall forms a part of a dome wall of a dome which extends upwardly beyond the height position. The lid recess extends downwards beyond the height position and has an outer diameter at its outer surface which is adapted to the inner diameter of the receptacle wall such that the lid recess functions at least as a centring and guide projection for the lid-clip-on action, which projection slidingly co-operates with the receptacle wall already at least while the bead passes the constriction.

The invention discloses a synchronous excavation supporting system for a deep and large asymmetric pit in a soft soil area and an implementation method of the supporting system. The deep and large asymmetric pit consists of a deep area and a shallow area which are internally close to each other, the top elevation of an enclosure structure at the junction of the deep area and the shallow area is a substrate of the shallow area, the total pit is provided with a first horizontal support in a unified way, the deep area is additionally provided with a plurality of deep-area horizontal supports, a soil body platform used for balancing the horizontal transfer force of the deep-area horizontal supports is reserved at the junction of the interior of the shallow area and the deep area, and two sides of the soil body platform are sloped to the substrate of the shallow area, so that open excavation and bottom-up construction in the deep area and the shallow area can be synchronously carried out, the problem of imbalance of the internal force and the deformation of the pit caused by an asymmetric excavation mode due to function requirements is solved, and the asymmetric pit can be excavated in a safe, reliable, economic and environment-friendly mode; through the synchronous excavation of the deep area and the shallow area, the construction period can be effectively shortened, and the construction cost is reduced; moreover, the supporting system is definitely stressed, the horizontal force of each horizontal support additionally arranged in the deep area is reliably transferred, and the construction feasibility is high.

The invention relates to an ultralow-density oil-base drilling fluid. The invention is characterized in that the ultralow-density oil-base drilling fluid is prepared from the following raw materials: base oil, a density reducer, a suspension stabilizer, an emulsifier, a tackifier, a fluid loss additive, a flow pattern regulator, an alkalinity regulator and a calcium chloride water solution. The base mixed oil is prepared by the following steps: mixing 3# white oil, 5# white oil and natural gas prepared oil, adding a flash point enhancer while stirring, and standing for 0.5-1 hour; and stirring at low speed at the temperature of 30-40 DEG C, and slowly adding oil-soluble nano fumed silica while stirring, wherein the addition process is controlled at 2-3 hours. The ultralow-density oil-base drilling fluid has the advantages of favorable emulsifying stability, favorable rheological properties, high inhibition property for mud shale, high emulsion-breaking voltage, low filter loss, low density (0.75-0.90 g / cm<3>), and high sand carrying and pressure bearing capacities, is beneficial to cleaning the borehole and enhancing the mechanical drilling speed, solves the problem of severe lost circulation in the low-pressure formation and long-section shatter zone formation, and is especially suitable for low-pressure oil gas pools and depletion water-sensitive formations.

The invention discloses a preparation method of a high-thermal-conductivity flexible phase change material and a battery module. The preparation method of the high-thermal-conductivity flexible phasechange material comprises the following steps: putting a styrene-butadiene-styrene block copolymer into an organic solvent to be sufficiently dissolved into a gel; then mixing paraffin and a heat conduction enhancer, grinding into powder, and fully stirring and mixing with the colloidal styrene-butadiene-styrene block copolymer. The traditional melt blending process is omitted; therefore, the separation phenomenon of two materials is avoided; the adopted organic solvent is easy to volatilize, so that a compact reticular film is formed on the surface of the phase-change material, the coating compactness of the composite phase-change material powder is effectively improved, the flexibility and toughness of the phase-change material are improved, the leakage resistance and latent heat value are improved, and the heat-conducting property of the phase-change material can be improved by adding the heat conduction enhancer .