13 results about "Shear force" patented technology

The invention discloses full oil base drilling fluid with high dynamic shear force ratio. The full oil base drilling fluid comprises base oil and other ingredients on the basis of the volume of the base oil: 1.5-2.5% of main emulsifying agent, 0.5-1.0% of auxiliary emulsifying agent, 0.8-1.0% of reverse wetting agent, 0.8-1.0% of shearing potentiator, 0.3-0.5% of thermoplastic flow type regulating agent, 2.0-3.0% of calcium oxide, 1.0-3.0% of organic soil, 1.5-2.0% of fluid loss additive and weighting material, and due to the addition amount of the weighting material, the density of the full oil base drilling fluid is 0.89-2.50g / cm<3>. The addition amount of the organic soil in the full oil base drilling fluid system is reduced by 1.0-3.0% through adding the thermoplastic fluid type regulating agent, the dynamic shear force ratio of the system is obviously improved and can achieve more than 0.45, the rheological property of the system can be improved, the comprehensive properties can be improved, and the production cost can be saved.

The invention belongs to the technical field of structural engineering, and particularly relates to a heat-preservation wall body for a mixed structure of a wood frame and a wooden shear wall, and assembly technology. The assembled heat-preservation wall body consists of wall studs, a wood base structural slab, a gypsum board, heat-preservation cotton, a wood-frame pillar, a mudsill board and a top beam board, wherein a horizontal interval between every two adjacent wall studs is 400 to 600 millimeters, and the wall studs on both sides are connected with the wood-frame pillar through nails; the wood base structural slab covers the wall body, is connected with the wall studs, the top beam board and the mudsill board through the nails, and is flush with the outer side of the wood-frame pillar; the gypsum board is covered on the inner side of a wallboard and is connected with the wall studs through screws; and the heat-preservation cotton is filled between inner and outer cladding boards. Materials for the assembled wall body provided by the invention can improve the natural environment in the process of growth, have the advantages of low energy consumption in the machining process, regeneration and natural degradation after abandonment, and have the functions of quick construction, vibration prevention, energy conservation, heat preservation, heat insulation and the like; the heat-preservation wall body has the advantages of high industrial production degree, high production efficiency, less on-site wet operation, a plurality of operational surfaces and quick construction; and the materials, such as dimension stocks, connectors, plywood, laminated wood and the like can be localized to reduce the construction cost.

The invention discloses a high-temperature fire-proof material granulating method, which is characterized in that: first the material enters the material distributor, to be forced by three horizontal wing-shape mixing lodicules and vertical mixing shovel to make frequency variable speed-adjustable circle motion, therefore, the material can writhe by the shearing forces in horizontal and vertical directions to attain uniform material; wherein, the set granulating condition comprises: time: 800-1000s; temperature: 40-50Deg. C; and when reaching said condition, opening the vacuum valve, to adjust the pressure in -0.06-0.08MPa, and the mixing lodicules and shovel granulate in variable speed again, and vacuuming the gas of mixed material to improve the density more, reduce the hole rate and improve eth size and uniformity of particles.

This application relates to a composite concrete component, belonging to the field of concrete components, which includes a prefabricated concrete component and a rear concrete component, and a support mechanism is provided in the superimposed part between the prefabricated concrete component and the rear concrete component, so The supporting mechanism includes a strengthening component for resisting shear force and a positioning component for positioning the rear reinforcement. This application has the effect of improving the problem of insufficient shear force resistance.

The invention relates to a sample clamping device for shear force measurement at low temperature. The device comprises a pressure applying unit, an upper flange, a first pressing block, a second pressing block, a third pressing block, a lower flange, a first guide rod and a second guide rod, wherein the pressure applying unit is fitted with the upper surface of the upper flange and used for applying pressure to the upper flange; the upper surface of the first pressing block is connected with the lower surface of the upper flange; the lower surface of the first pressing block is an inclined plane and a first groove is formed in the lower surface of the first pressing block; the lower surface of the third pressing block is connected with the upper surface of the lower flange; the upper surface of the third pressing block is an inclined plane and a second groove is formed in the upper surface of the third pressing block; the upper surface of the second pressing block is matched with the lower surface of the first pressing block and a third groove opposite to the first groove is formed in the upper surface of the second pressing block; the lower surface of the second pressing block is matched with the upper surface of the third pressing block and a fourth groove opposite to the second groove is formed in the lower surface of the second pressing block. The sample clamping device can measure maximum shear force among different materials at the low temperature.