15 results about "Specific weight" patented technology

The utility model relates to the technical field of constructional engineering, and particularly discloses an assembly type component hoisting and positioning device which comprises a moving assembly, a lifting assembly and a positioning assembly. The lifting mechanism comprises a lifting assembly and an adjusting assembly which are mounted on the mounting box, and the adjusting assembly can drive the lifting assembly to rotate; by starting the driving piece, the output end of the driving piece can drive the two-way ball screw to rotate, so that the two sliding blocks are driven to stably move towards or away from each other along the thread track of the two-way ball screw, and the sliding blocks stably slide on the supporting frame through the T-shaped blocks, so that the two lifting hook bodies are pulled to synchronously move; the distance between the two lifting hook bodies can be conveniently adjusted according to the specific weight and shape of a lifted component, so that the lifting hook bodies can be uniformly stressed, the stable state of the component in the lifting process is effectively maintained, shaking is reduced to the maximum extent, and the lifting safety and stability are improved.

The present invention relates to a cementitious tile adhesive composition comprising biochar in a specific weight ratio to the cementitious binder or, where the cementitious binder comprises slag, in a specific weight ratio to slag. The present invention also relates to the preparation method of a cementitious tile adhesive composition with a reduced carbon footprint, especially a carbon-negative cementitious tile adhesive composition.

The application discloses a tunnel lining load determination method, system, equipment and medium, and comprises the following steps: acquiring basic design parameters of a subway tunnel; the basic design parameters of the subway tunnel comprise a tunnel outer diameter, a tunnel buried depth, a specific weight of surrounding rock soil, a friction angle of the surrounding rock soil and a cohesion of the surrounding rock soil; determining a design included angle between a tunnel strike line and a ground fissure strike line; calculating an equivalent coefficient of a surrounding rock soil rupture angle on both sides of the tunnel and the surrounding rock soil rupture angle on both sides of the tunnel according to the basic design parameters of the subway tunnel; calculating external force exerted by the surrounding rock on both sides of the tunnel on the subway tunnel lining when the ground fissure is active according to the surrounding rock soil rupture angle on both sides of the tunnel; and obtaining the maximum load of the subway tunnel lining according to the external force exerted by the surrounding rock on both sides of the tunnel on the subway tunnel lining. The application fully considers the influence of the ground fissure activity on the subway tunnel, determines the maximum lining load required in the subway engineering design crossing the ground fissure, and ensures the structural safety of the subway tunnel.

The application discloses a manganese steel material and a preparation method and application thereof, and belongs to the technical field of steel castings. The manganese steel material is prepared by limiting the specific weight percentage of the composition components in the manganese steel material and optimizing the heat treatment process of the manganese steel material, and the manganese steel material has a light weight, high-temperature wear resistance and a structure of fine austenite+dispersion distributed carbide or fine austenite+fine ferrite+dispersion distributed carbide. The manganese steel material has excellent high-temperature wear resistance at <=800 DEG C, and has a good practical prospect.

A weather strip with a low specific weight and a low water absorption index is provided. The weather strip to be attached to a car includes a hollow sealing portion with a hollow space formed inside, and the hollow sealing portion includes a foamed wall portion that is at least part of a wall forming the hollow space, which has bubbles formed inside, the number of bubbles being not less than 200 / mm2, at least some of the bubbles originating from a thermally expandable microcapsule, which has a thickness of not less than 1.0 mm and not more than 2.0 mm, and which has a specific gravity not greater than 0.45.

The present invention relates to the field of drilling engineering and discloses a resin cement slurry, a preparation method thereof, and applications thereof. The resin cement slurry comprises the following components, measured in parts by weight: 100 parts of cement, 1-100 parts of epoxy resin, 1-80 parts of curing agent, 1-100 parts of skeleton material I, 1-100 parts of skeleton material II, 0.1-40 parts of setting agent, 0.1-40 parts of toughening agent, 1-40 parts of dispersant, 0.1-20 parts of fluid loss additive, 0.1-40 parts of defoaming agent, 1-100 parts of water, and 0-100 parts of density modifier. The resin cement slurry is prepared by selecting the components in the above-mentioned specific weight proportions. The slurry has good rheological properties and is easy to use for cementing construction. The resulting resin cement slurry has higher compressive strength, lower elastic modulus, and can be used for a long time at an operating temperature of 45-95°C.

The present invention discloses a method for manufacturing a high-strength and toughness casing, which belongs to the field of steel materials for oil and gas. The chemical composition of the casing has specific weight percentages of multiple elements such as C, Si, and Mn, and is made through multiple processes such as molten iron pretreatment and converter smelting. During the manufacturing process, the process parameters of each link are strictly controlled, such as RH degassing time, temperature of each stage, annealing and holding time, etc. The raw steel coil after pre-annealing has low strength, good plasticity and toughness, is easy to form, and the banded structure is ≤ level 2. After welding, thermal tension reduction and full pipe heat treatment, the finished pipe has Rp 0.2 ≥900MPa, R m ≥985MPa, elongation ≥22%, longitudinal impact energy of the parent material at ‑10°C ≥130J, and a homogenized tempered bainite structure. This invention addresses the challenges of high-strength and toughness casing raw materials, including the difficulty of rolling and cracking during welding, and meets the stringent requirements for casing performance in unconventional oil and gas production.

The invention discloses a manufacturing method of a high-strength and high-toughness sleeve, and belongs to the field of steel and iron materials for petroleum and natural gas. The chemical components of the casing pipe have specific weight percentages on multiple elements such as C, Si, Mn and the like, and the casing pipe is manufactured through multiple procedures such as molten iron pretreatment and converter smelting. In the manufacturing process, technological parameters of all links, such as RH degassing time, temperature of all stages, annealing heat preservation time and the like, are strictly controlled. The pre-annealed raw material steel coil is low in strength, good in plasticity and toughness and easy to form, and the banded structure is smaller than or equal to grade 2. After a finished pipe is subjected to welding, hot tension reducing and whole pipe heat treatment, Rp0.2 is larger than or equal to 900 MPa, Rm is larger than or equal to 985 MPa, the elongation is larger than or equal to 22%, the longitudinal impact energy of base metal at the temperature of 10 DEG C below zero is larger than or equal to 130 J, and the structure is homogenized tempered sorbite. The problems that a high-strength and high-toughness casing pipe raw material roll is difficult to form and prone to cracking during welding are solved, and the high requirement of unconventional oil and gas exploitation for casing pipe performance is met.

The utility model discloses a device for measuring bulk material pile specific gravity, which relates to the technical field of industrial measuring equipment, and comprises a measuring tube body and an auxiliary footage device, the measuring tube body is used for being inserted into bulk materials and enabling the measuring tube body to be filled with bulk material standard samples; the output end of the auxiliary footage device is detachably and fixedly connected with one end of the measuring pipe body to drive the measuring pipe body to rotate around the axis of the measuring pipe body, the measuring pipe body rotates to cut the bulk material so that the measuring pipe body can be inserted into the bulk material to extract the bulk material standard sample, the structure is simple, use is convenient, and the practicability is high. And the measurement efficiency and accuracy of bulk material pile specific gravity measurement are effectively improved.

The invention discloses a weighing module of a feeding device with a sensor weighing structure, and relates to the technical field of conveying, the weighing module comprises a support, a first conveying module, a second conveying module, the weighing module and a screening module are installed on the support in a matched mode, and the weighing module and the screening module are located between the first conveying module and the second conveying module. The screening module is located above the weighing module and comprises a screening bin, the screening bin is obliquely arranged, a collecting tank is cooperatively installed on the upper side of the screening bin, a first screening net and a second screening net are cooperatively installed in the screening bin, and the inner space of the screening bin is divided into three layers of channels by the first screening net and the second screening net; three discharging augers are installed at the lower end of the screening bin in a matched mode. The weighing module is independently arranged, interference of other pipelines is avoided, the weighing result is more accurate, the feeding operation of specific weight can be carried out, and the weight of materials fed at a time is more accurate.

The utility model provides an automatic weighing and distributing device which comprises a shell assembly and an automatic weighing and distributing device body arranged in an inner cavity of the shell assembly, the automatic weighing and distributing device body comprises a control mechanism, a weighing assembly and a distributing assembly, and the weighing assembly and the distributing assembly are electrically connected with the control mechanism. The weighing assembly comprises a weighing machine and a weighing container connected with the weighing machine, a barrier plate of the material distributing assembly is movably arranged at a second outlet of the weighing container, the vibration assembly comprises a vibratable support, a vibration disc and a vibration piece connected with the vibration disc, the vibration disc is arranged on the vibratable support, and the vibration piece is connected with the vibration disc. And the first outlet of the vibrating disc is arranged above the inlet of the weighing container. The automatic weighing and distributing device provided by the utility model can be used for separating small-weight materials with specific weight.

The application provides a method for determining the height and gravity of mud in mechanical construction of a sinking well, comprising the following steps: determining the distance from the pressure water head height to the pressure roof, the distance from the sinking well bottom to the pressure roof, and the average gravity of the soil between the sinking well bottom and the pressure roof; determining the product of the mud gravity and the mud height; determining the gravity, internal friction angle, and cohesive force of each soil layer outside the sinking well; determining the active earth pressure coefficient of each soil layer of the sinking well side wall; determining the earth pressure outside the sinking well side wall; determining the passive earth pressure coefficient of the sinking well side wall by the mud; determining the unit length gravity of the sinking well, the width of the sinking well blade foot plane, the inclination angle, and the thickness of the sinking well; determining the vertical distance from the earth pressure action point of the sinking well side wall to the inner point of the blade foot; determining the force of the mud on the sinking well side wall; determining the vertical distance from the pressure action point of the sinking well side wall by the mud to the inner point of the blade foot; determining the moment of the inner point of the blade foot by the mud; and determining the mud height and the mud gravity.

The invention discloses a corrosion-resistant and wear-resistant suspender and a heat treatment method thereof, and belongs to the field of boiler parts and metal heat treatment. In order to solve the problems that an existing suspender is insufficient in molten salt corrosion resistance and particle washing resistance, uneven in large section performance and short in service life, low alloy components with specific weight percentage are designed, the low alloy components comprise 0.18-0.28% of C, 3.00-5.00% of Cr, 0.80-2.00% of Ni, 0.15-0.35% of V, 0.0010-0.0035% of B and the like, normalizing, austenitizing at the temperature of 870-910 DEG C, salt bath isothermal quenching at the temperature of 360-410 DEG C and tempering at the temperature of 500-560 DEG C are adopted, and a complex-phase structure with lower bainite as the main part is obtained. The hanger rod is remarkably improved in corrosion resistance and wear resistance, uniform in large-section performance, capable of prolonging the service life to 8-12 years, less than or equal to 20% in cost increase, compatible with an existing production line, suitable for hanging a boiler heating surface tube bundle, and outstanding in economic benefit and environmental protection benefit.

The invention discloses a fog drop testing method for a demister of a wet desulphurization system. Compared with the prior art, the method has the advantages that the change of physical properties and chemical properties of the desulfurized slurry passing through the demister is considered, solid components in the fog drops are directly obtained through weighing, and the weight of water in the fog drops is calculated according to the tested magnesium ions, so that the specific weight and concentration of the fog drops are obtained. According to the improved fogdrop testing method, an ultrasonic or acid soaking cylinder and ultrasonic pretreatment mode and two-step weighing of solid components are adopted, the testing steps are more precise and detailed, and slurry data measurement is more accurate; meanwhile, the solid content of the slurry does not need to be measured, operation steps are reduced, influences caused by introduction of the solid content of the slurry into calculation are reduced, and the measured fog drop content is more accurate.

The application discloses a calculation method of uplift bearing capacity of a shallow-buried rigid pile foundation, and comprises the following steps: S1, determining the specific weight gamma, internal friction angle phi and cohesive force c of the rock-soil body in the pile foundation buried depth range; S2, calculating the limit shear stress tau of the rock-soil body vertical fracture surface at different depths xz ; S3, calculating the shear stress of the rock-soil body at different depths; S4, calculating the shear force of the rock-soil body at different depths; and S5, adding the shear forces at different depths to obtain the foundation limit uplift bearing capacity T uk . According to the soil mechanics principle, the limit equilibrium theory of the rock-soil body is utilized, the shear strength of the rock-soil body under the uplift limit equilibrium state is derived from the basic physical and mechanical parameters of the rock-soil body, and then the uplift bearing capacity of the foundation is calculated from the shear strength. The uplift bearing capacity of the upper soil body is fully considered, which is favorable for accurately designing the foundation size and avoiding unnecessary waste.