50results about How to "Simple mechanical properties" patented technology

The invention discloses a high-salt high-alkali medium-low-level radioactive liquid waste cement solidified body which is composed by mixing the following components: high-salt high-alkali medium-low-level radioactive liquid waste and, solidification material, water glass and cellulose ether, wherein the high-salt high-alkali medium-low-level radioactive liquid waste to the solidification material is 0.55-0.75: 1 in mass proportion; the modulus of the water glass is 2.5-3.5 based on Na2O in the water glass and the mass of the solidification material is 1-3% of the mass of the water glass ; the mass of the solidification material is 0.05-0.5% of the mass of the cellulose ether; the component mass percent of the solidification material is as follows: 20-40% of low-heat Portland cement, 15-50% of slag powder, 15-30% of coal ash, 5-15% of zeolite and 5-15% of attapulgite; and the cement solidification body with various properties meeting the requirements is obtained by carrying out normal-temperature maintenance on the mixed slurry which obtained by mixing and stirring. The high-salt high-alkali medium-low-level radioactive liquid waste cement solidified body is suitable for the solidification of the medium-low-level radioactive liquid waste, which has the total salt concentration being 100-400g/L, the pH value being larger than 13 and the nuclide being 90Sr or/and 137 Cs.

The invention relates to a rapid solidification construction method for sea mud on a large-area coastal beach. The rapid solidification construction method specifically comprises the following steps of performing construction partition, performing mud excavation, mud piling and draining, spreading an HAS sea mud curing agent, stirring the HAS sea mud curing agent and the sea mud uniformly, performing enclosing material solidification on the mixed soil to obtain a sea mud consolidated body and performing layered and blocked/segmented backfilling and compaction on the sea mud consolidated body.The method has the beneficial effects that the foundation bearing capacity, compaction degree, deflection value and the like after the sea mud is cured by the HAS sea mud curing agent in situ can meetcorresponding standards, uneven settlement can be reduced after layered backfilling, the foundation bearing capacity can reach more than 110 kPa, and common foundation requirements such as field-leveling foundation, building foundation and road subgrade can be met.

The invention relates to a dual-rotor coaxial helicopter with wing-shaped rotors, and the helicopter belongs to B64C 27/04. helicopters according to international patent technology classification. The general layout adopts a mashup design of a dual-rotor coaxial helicopter and a fixed wing aircraft with preposed canard wings. An elevator is preposed, and horizontal wings and ailerons for lateral control are disposed at the rear. A control surface that is responsible for yaw control is positioned behind ducted propellers that are disposed at the rear and used for providing thrust. Fans are arranged below the fuselage on the left and the right so as to retreat or horizontally and slightly adjust the fuselage hovering position or make the fuselage revolve. Due to the wing shape change, when an engine encounters in-flight shut-down, the helicopter continuously suffers height loss, so that air and the rotors interact to convert the potential energy of the helicopter into kinetic energy, which makes the rotors continue to rotate according to the rotation direction of the engine during working hours. Consequently, a lifting force can be generated, and fall can be changed to a safe landing. The helicopter provided in the invention can solve or improve the problems of small speed, short flying range, low flight height, great vibration and noise, poor reliability, high cost and use fee in helicopters in active service.

The invention discloses a short-flow pre-treatment method for pure cotton heavy fabrics and belongs to the technical field of dyeing and finishing pre-treatment. The short-process pre-treatment methodfor pure cotton heavy fabrics comprises the steps of padding a singed pure cotton heavy gray fabric with scouring and bleaching liquid, then piling up the fabric at room temperature, executing steaming and washing, executing slight rinsing with a dilute aqueous solution of hydrogen peroxide, finally executing low-alkali mercerizing, and then executing full washing to complete the pure cotton heavy fabric pre-treatment process. The process is good in treatment effect, has the advantages of small fabric strength damage, high quality, soft handfeel, high hair effect and good glossiness, also creates the high color yield condition for subsequent dyeing and printing processing and is simple in technological operation and strong in controllability. In addition, the treatment wastewater, chemical agent use amount and energy consumption of the process are far lower than those of a traditional strong alkali scouring process, and the burden of sewage treatment of enterprises is greatly reduced.

The invention disclose a light high strength pavement device, comprising a pavement base, a tie down device, a plurality of struts and a pavement segment piecing device; wherein, the pavement base is double-layer bursiform fabric braided by fiber; the struts are inserted into the pavement base horizontally in a certain spacing distance; the piecing device comprises a plurality of piecing hinge ears and a piecing bar. The piecing hinge ears are sewed on both ends of the pavement base. The ternary conjugated structure of the double-layer bursiform fabric and the strut form in braided complex mode can improve the bearing capacity, and the effective width is no less then four meters, and the pavement can be longitudinally spliced or disassembled quickly via the jointing device. The light high strength pavement device has the advantages of light weight, small diameter after folding, convenient transportation and operation of laying and withdrawing, excellent wear resistance and anti-slip performance.

The invention discloses a static drill squeezed branch and pipe pile combined pile type. The static drill squeezed branch and pipe pile combined pile type comprises a pipe pile, a squeezed branch pile and an expanded pile, wherein the outer wall of the pipe pile is sleeved with the squeezed branch pile, and the expanded pile is connected with the end of the squeezed branch pile. The pipe pile is a hollow pipe. The pipe is filled with cement soil, and the solid pipe pile is formed. The squeezed branch pile comprises a squeezed branch pile body and squeezed branches distributed on the squeezed branch pile body at equal intervals in the axial direction. The squeezed branch pile is a cement soil pile. The expanded pile is an expanded concrete pile body. According to the static drill squeezed branch and pipe pile combined pile type, part of a soil body is extruded to the hole wall, the pile side friction is increased, discharge of an original soil body is reduced, meanwhile part of the residual soil body is dug out, a large-caliber pile foundation is formed, and the pile foundation bearing force is improved; then the squeezed branches are arranged, pre-pressure is applied to the side wall, the contact area of the combined pile and the soil is increased, the effective area of the pile body is increased, and the bearing force of the combined pile is improved; and then expansive concrete is pressed into a pile end expanded hole to form pre-pressure on the pile end, and the bearing capacity of the pile end is further improved.

The invention is to obtain the automatic change of the reel in an unwinder, in particular for reels of paper and other materials in web form, operation in which a reel (2) that is nearly empty is replaced with a new reel (2'), wherein provision is made to connect a tail portion (LC) of the web of the nearly empty reel (2) to the head portion (LT) of the web of the new reel (2') after overlapping of said ends (LC) and (LT), said overlap step begins along the surface of the new reel 2', right next to the latter.

The invention relates to the field of energy-dissipation components of building structures, in particular to a supporting type metal damper which is simple in mechanical property, convenient to mount and stable in energy dissipation. The novel supporting type metal damper comprises a connecting component and an energy dissipation component. The connecting component comprises a first connecting plate, a third connecting plate and a second connecting plate, wherein the first connecting plate, the third connecting plate and the second connecting plate are sequentially placed in parallel from top to bottom. The energy dissipation component comprises a first shearing energy-dissipation steel plate and a second shearing energy-dissipation steel plate, wherein the first shearing energy-dissipation steel plate is fixedly arranged between the lower plate surface of the first connecting plate and the upper plate surface of the third connecting plate, and the second shearing energy-dissipation steel plate is fixedly arranged between the lower plate surface of the third connecting plate and the upper plate surface of the second connecting plate. The supporting type metal damper is arranged between a beam and a column in an obliquely-supported mode, and hinge steel plates used for being connected with a beam-column frame of a building are arranged at the ends of the connecting plates correspondingly. The novel supporting type metal damper is simple in mechanical property, convenient to mount and stable in energy dissipation; and besides, the supporting type metal damper is simple and easy to transform, the construction period is short, and the apparent characteristics can be easily checked.

The invention provides a staged yield damper, comprising: upper and lower connecting plates (1), a first energy dissipation steel plate (2), a second energy dissipation steel plate (3), the first energy dissipation steel plate (2) and The second energy-dissipating steel plates (3) are arranged between the upper and lower connecting plates (1), wherein the first energy-dissipating steel plates (2) and the second energy-dissipating steel plates (3) are alternately arranged. In the present invention, by installing alternately arranged first energy-dissipating steel plates and second energy-dissipating steel plates between the upper and lower connecting plates, the stages of different yield degrees formed by the first energy-dissipating steel plates and the second energy-dissipating steel plates damper. The staged yield damper in the invention has simple mechanical properties, convenient installation, stable energy consumption, and can meet the energy consumption requirements of wind vibration, small earthquake and large earthquake at the same time.

The invention relates to a preparation method of a surface coating treating agent capable of improving the strength of a phosphate strengthened quartz fiber composite material and a coating treatment method, and relates to a preparation method of a surface coating treating agent for phosphate strengthened quartz fiber composite material and a coating treatment method. In order to solve the problems that the phosphate strengthened quartz fiber composite material prepared by using coating anticorrosive treatment in the existing method is bad in mechanical properties at normal temperature and high temperature, the treating agent is prepared by dissolving thermosetting phenolic resin in ethanol so as to obtain the surface coating treating agent. The preparation method comprises the following steps of: immerging quartz fiber in the surface coating treating agent for soaking; and airing after taking out so as to complete the coating treatment. The preparation method of the treating agent is simple, and the coating treatment method is simple; for the phosphate strengthened quartz fiber composite material prepared by taking the quartz fiber after being treated as a base material, the bending strength at the normal temperature reaches to 300MPa, and reaches to 124MPa at 500 DEG C; and the phosphate strengthened quartz fiber composite material can be applied to the high temperature resistance fields of aviation, aerospace, and the like.

The invention provides a degradable biomedical forging-state magnesium alloy, and belongs to the field of degradable biomedical materials. The degradable biomedical forging-state magnesium alloy is prepared from the components in percentage by mass: 3.3 to 9 percent of Zn, 0.1 to 0.6 percent of Zr, 0.75 to 2 percent of Y, and the balance Mg, wherein the mass ratio of Zn/Y is larger than 4.38 and smaller than 6. The magnesium alloy not only has a favorable magnesium alloy and good corrosion resistance, but also has favorable biocompatibility, is suitable to be used as bone repair materials suchas a porous magnesium alloy material, a plastic surgery department material, an oral cavity oral cavity implant material and a bone lamella nail, and is particularly suitable to be used as a cardiovascular stent material and a bone repair material.

The invention discloses a laser range finding level ruler with positioning and voice reading functions, and relates to the technical field of laser range finding. The level ruler comprises a ruler body, the top and bottom of the left side of the ruler body are provided with a laser receiver and a laser emitter respectively, the top center position of the surface of the ruler body is provided with a display, the left and right sides of the top of the ruler body are provided with a loudspeaker and a handle respectively, and the output end of the laser receiver is electrically connected with the input end of the a reception control circuit. The display is an LCD with backlight, the surface of the display is provided with a PVC protective film, the LCD with backlight can display patterns, use at night is enabled, the PVC protective film prevents a screen from being scratched, the service life of the display is prolonged, and the ruler is simple in the optical system and mechanical structure, high in precision, low in errors, low in cost, and stable and reliable.