31results about How to "Guaranteed aperture" patented technology

This application relates to the technical field of foundation engineering, and discloses the construction process of long spiral cast-in-situ piles with vibration and pipe, including the following construction steps: step 1, preparation before construction; step 2, drilling into holes; step 3, concrete pouring; step 4, Hammering of the steel casing; step five, placing the reinforcement cage; step six, secondary pouring of concrete and removal of the steel casing. This application uses the pipe pile of the pile driver to pour concrete mortar in the borehole, which can ensure the borehole diameter and avoid the collapse of the hole, and then use the vibrating hammer to hammer the casing into the original pile position filled with concrete mortar. The uncondensed concrete at the original pile position is squeezed around to expand the pile diameter, increase the diameter of the pile foundation and the degree of integration with the ground, thereby improving the bearing strength and stability of the pile foundation.

The invention relates to a drill bit with multilayer stereoscopic tool faces for glacier drilling exploration. The drill bit is characterized in that a drill bit body is connected with upper-layer tool bits, the upper-layer tool bits are positioned in a drill body which is in the shape of a barrel, three-position tool bits and bottom spiral contact surfaces of the drill body are arranged on the lower portion of the barrel, 45-degree included angles are formed between the three-position tool bits and the bottom spiral contact surfaces of the drill body, and the three-position tool bits are equidistantly separated from one another by 120-degree angles at the bottom of the barrel. Lower-layer tool bits are positioned on the inner lower portion of the barrel and are connected with the wall of the barrel, 135-degree included angles are formed by the lower-layer tool bits and the wall of the barrel, and planes where the lower-layer tool bits are located intersect with planes where the upper-layer tool bits are located. The drill bit has the advantages that the drilling operation stability and safety can be improved owing to the bottom spiral contact surfaces of the drill body, the service life of the drill bit can be prolonged owing to the upper-layer tool bits and the lower-layer tool bits, the stone and ice crushing capacity of the drill bit can be enhanced by the upper-layer tool bits and the lower-layer tool bits, and the ice crushing perpendicular upward detachment and the diameters of drilled holes can be guaranteed by the aid of the drill body which is in the shape of the barrel.

A construction method for the sliding frame of a cantilever beam for a jack-up drilling rig, comprising the following steps: (1) preparing materials: CNC blanking; and adding in allowances in the directions of the length and width of the blanks, together with that of the radius of plug pin holes; (2) forming the main plate (1) and web plate (3) by way of jointing members: jointing the members together end-to-end, and forming fore, middle and aft sections; then cutting out the allowance in a widthwise direction, and cutting a slope into the web plate; (3) manufacturing a T-shaped component: assembling the main plate (1) and the web plate (3) together to form a T-shaped component; (4) machining plug pin holes (2): drawing the center lines and machining lines of the plug pin holes (2), and boring the plug pin holes (2) until the diameters thereof meet the drawing requirements; (5) closing in field: firstly determining, according to the requirement of the distance between the sliding frame and a well center line (4), the positions of the fore and aft T-shaped sections, then measuring the space between the fore and aft T-shaped sections, distributing the distance equally for middle T-shaped sections, and positioning the middle T-shaped sections. The construction method can ensure that the sliding frame meets various construction requirements while improving construction efficiency and reducing construction cost.

The invention discloses a manufacturing method of a metal woven screen, which successively comprises the following steps: carrying out pressing and pre-springing on steel wires by a knurling wheel; simultaneously carrying out high-frequency quenching or mid frequency quenching on a plurality of steel wires after pre-springing, and then tempering so as to enable the hardness of the steel wires to be HRC42-52; and weaving the steel wires after the heat treatment into a screen. The invention greatly improves the wear-resisting property of the screen, prolongs the service life of the screen, can carry out the high-frequency quenching or the mid frequency quenching on a plurality of steel wires at the same time, and greatly improve the production efficiency. The heat treatment is carried out before woven, thereby improving the abrasive resistance of the screen, avoiding the looseness of the screen in the process of heat treatment, ensuring the evenness of aperture, and reaching the national GBT standard.

The invention relates to a drying method for a polyglycolide warp-knitted support net for artificial skin, specifically performing pre-drying, deep drying and fabric stress relaxation successively. The present invention can completely remove the moisture in the polyglycolide warp-knitted support net and the solvent remaining in the cleaning process, and can effectively maintain the properties of the polyglycolide warp-knitted support net such as tensile breaking strength, pore diameter, and grammage, It is of great significance for the application of polyglycolide warp knitted support net in the field of medical artificial skin.

The invention relates to a non-hard rock coring drill bit and a processing technology thereof, belonging to the technical field of drill bits for geological exploration. The technical solution is: positive water ports (4) and anti-water ports (5) are arranged alternately at the end of the drill bit steel body (1), the protrusions between the adjacent positive water ports and anti-water ports are tire blocks, and the tire blocks include tire blocks one (2) and tire block two (3); between the adjacent positive water outlet and reverse water port opposite to the spiral direction is tire block one (2), and the adjacent positive water port (4) and reverse water port (5) opposite to the spiral direction There are tire blocks two (3) in between, and tire block one and tire block two are arranged alternately on the circumference of the end of the steel body of the drill bit. Beneficial effects of the present invention: convenient manufacture, reasonable structure, reduced occurrence of collapse and sticky drills; reduced frequent replacement of drill bits in soft rock formations, improved drilling efficiency and reduced drilling costs, through the actual use of on-site machines, The purpose of the invention is achieved, and the problem of difficult coring in soft rock formations in the technical field of drilling for geological exploration is solved.

The invention relates to microporous carbon aerogel and a preparation method thereof. The microporous carbon aerogel is prepared by adding mixed eutectic molten salt composed of LiNO3, KNO3 and K2SO4 in a step of preparing organic wet gel; parameters include that specific surface area is 850-1350m2 / g, pore size distribution is 1-2nm, pore volume is 0.38-0.43cm3 / g, and adsorption amount of CO2 at normal temperature and normal pressure is 3.2-3.8mmol / g. The microporous carbon aerogel prepared by the method is high in specific surface area, narrow in pore size distribution range, large in pore volume and high in ability of adsorbing carbon dioxide. The preparation method is simple in steps, convenient to operate, low in production cost, short in process time and environment-friendly.