70results about How to "Improve the stretching effect" patented technology

The invention discloses a method for strengthening a concrete column by pre-stressed fiber cloth, using a tensioning device with a connecting-rod structure, which is capable of rapidly carrying out tensioning movement, and having the advantages of simple and convenient operation and high work efficiency. More particularly, the fiber cloth can obtain high enough tension and correspondingly, the concrete column can obtain high enough radial compressive pre-stress by applying smaller transverse tension, thereby achieving the purposes of strengthening the concrete column and preventing surface longitudinal cracks from being generated and expanded and reducing the requirements for the tensioning device and process. The tensioning device of the invention has the advantages that the stress of the fiber cloth is uniform and the tensioning effect is good during the tensioning process, and the damage of the tensioning operation to the original concrete structure is low; and the invention can greatly save the construction cost, reduce the construction risk and reduce the construction period. Therefore, the invention is of significant benefits to technology and economics in an overall manner.

The invention discloses a horizontal tensioning method of a reinforcing concrete column by prestressed fiber cloth, fiber cloth is correspondingly arranged in the areas to be reinforced on the concrete column surface along the circumferential direction, the spaces between both ends of the fiber cloth and the concrete column surface are settled, and both ends of the fiber cloth are fixedly arranged; external surfaces horizontally across the both ends of the fiber cloth are respectively provided with horizontal bearing arms; the fiber cloth is pasted on the concrete column surface and fixed directly by moving the horizontal bearing arms and coating adhesive; and the invention alters the traditional longitudinal tensioning fiber cloth to horizontal tensioning fiber cloth, and can achieve equal tensioning effect with horizontal tension which is only 1 / 5 to 1 / 7 time of longitudinal tension, which reduces the demands of tensioning equipments and technique significantly. The invention has the advantages of simple equipment, and low manufacturing cost, is convenient for transportation and carrying, has good tensioning effect for the fiber cloth receives even stress in the tensioning process; and the tensioning operation has little damage to the structure of the original concrete, the manufacturing cost can be greatly saved, the project risk is reduced, the construction period is shortened, and comprehensive benefit of technology and economy is obvious.

The invention belongs to the field of steel wire production processes, and relates to a prestressed steel wire with a small relaxation rate and a manufacturing method of the prestressed steel wire. The prestressed steel wire is prepared from the chemical components in percentage by mass: 0.80-0.85% of C, 0.10-0.30% of Si, 0.60-0.90% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, less than or equal to 0.10% of Ni, less than or equal to 0.35% of Cr, less than or equal to 0.2% of Cu, and less than or equal to 0.15% of V. The manufacturing method comprises the following steps: wire rod acceptance check, acid pickling and phosphorization, examining, drawing, semi-finished product examining and testing, stabilizing treatment, wire collection, and finished product examining and testing. By formulating the reasonable semi-finished product size, drawing process and stabilizing treatment process and meanwhile finding the appropriate stabilizing treatment temperature, the relaxation value of 1000 hours of the phi 7.50 mm prestressed steel wire reaches to be the optimum, it is examined that the relaxation rate is 0.93%, and thus the requirement that the relaxationrate is smaller than or equal to 2.5% is met.

The present invention relates to a pesticide composition comprising gibberellin and brassinolide, and uses thereof, particularly uses in promoting of the plant fruit length increase, wherein the gibberellin and the brassinolide in the pesticide composition are used as the active components, a weight ratio of gibberellin to brassinolide is 1000:1-100:1, the plants are preferably banana, mango or Vigna unguiculata, and the fruit length increase is elongating the fruit. The invention further relates to a method for promoting the plant fruit length increase, and uses in reducing of gibberellin consumption.

A geogrid construction structure is used for laying tensioning construction of geogrid and further comprises a take-up device, a connection piece and a fixing piece. The geogrid comprises a fixed endand a free end. The fixing piece is arranged on a laid ground on one side of the free end of the geogrid, and the fixing piece and the free end are arranged in a spaced manner. The connection piece isdetachably connected with the take-up device and the geogrid. The take-up device comprises two side connection parts, one side connection part is connected with the fixing piece, and the other side connection part is connected with the connection piece. The fixed end is fixed to the laid ground. According to a construction method for the geogrid carrying out pulling and tensioning through the take-up device, the construction method has the beneficial effects that the pulling strength is large, the pulling effect is good, labor is saved, the construction speed is high, the working efficiency is improved, and materials are saved and other beneficial effects, and the construction method is wide in application range.

The invention discloses a manufacturing method for a prestress small box girder. The prestress small box girder is divided into an open groove section located in the middle and anchoring sections located at the two ends, the manufacturing method comprises the following steps that 1, the open groove section is poured, open grooves used for arranging prestress ribs are reserved in a web plate of the open groove section, and two tensioning holes used for tensioning the prestress ribs are preset at intervals for a certain distance at the bottoms of the open grooves; 2, the prestress ribs penetrate through the open grooves reserved in the open groove section, the prestress ribs after penetrating are fixedly connected with steel bar cages of the anchoring sections at the two ends of the prestress small box girder, and the anchoring sections located at the two ends of the prestress small box girder are poured; 3, after the anchoring sections are poured and solidified, the prestress ribs aretensioned downwards by tensioning equipment through two transverse tensioning holes in the bottoms of the open grooves, and the tension value and the elongation value of the prestressed ribs are checked to meet the requirement; and 4, the open grooves in the open groove section are poured, then the third pouring is finished, the tensioning equipment is disassembled after the open grooves are solidified, and then the manufacturing of the whole prestress small box girder is completed. According to the manufacturing method for the prestress small box girder, the grouting in the prestressed tension of the small box girder is denser, and meanwhile, the utilization rate of the prestress ribs is improved.

The invention discloses a segmented spinal drafting bed control structure with personalized curvature adjustment, including a bed frame. A head plate, and spinal column drafting and leg plates are sequentially arranged on that bed frame, the spinal column drafting plate is provided with a plurality of electric pushrods arranged in an array and a drafting pad, each electric push rod is sleeved in aguide hole corresponding to the spinal column draft plate along the vertical direction, the drafting pad is connected to the top of the electric push rods. The segmented spinal drafting bed control structure is characterized in that: the control structure comprises a main controller and a plurality of pressure sensors respectively connected between the top of each electric push rod and the drafting pad and used for detecting the bearing pressure. Each pressure sensor is respectively connected with the master controller through a wireless communication module, and the master controller controls the length of each electric push rod according to the bearing pressure value detected by each pressure sensor. The control structure of the invention has diversified functions, and can be individually adjusted according to the curvature of the human body, and has the advantages of comfortable use and good drafting curative effect.

The invention discloses a hanging basket guiding device used for painting the inner wall of a hyperbolic-type cooling tower and a painting method. The device comprises a hanging basket (1), a bearing rope (2), a structural steel support (3) and guiding assemblies. The two ends of the bearing rope (2) are connected with the structural steel support (3) and the hanging basket (1) respectively. Each guiding assembly comprises a guide rail rope (5), a chain hoist, continuous wall ribs (7) and inner thread casing pipes (8). The continuous wall ribs (7) are screwed with the inner thread casing pipes (8). The guide rail ropes (5) are sleeved with lantern rings of the continuous wall ribs (7). The head ends of the guide rail ropes (5) are fixed to a coping ring beam (4). The tail ends of the guide rail ropes (5) are tensioned by the chain hoists. The method is characterized in that during painting, a cant hook is used for hooking the guide rail ropes (5) and drawing the guide rail ropes (5) back so that the hanging basket (1) can get close to the inner wall of the cooling tower (13). According to the hanging basket guiding device used for painting the inner wall of the hyperbolic-type cooling tower and the painting method, the painting process is fast and convenient to conduct, labor is saved, and consumables are reduced.

The invention discloses an automatic control method for prestressed intelligent tensioning. The automatic control method comprises the steps of installing a tensioning device; construction of tensioning prestressed tendons by the tensioning device; construction of locking the prestressed tendons by the tensioning device and intelligent controlling over tensioning construction by a controller. Theautomatic control method has the beneficial effects that a tensioning telescopic part of a bidirectional jack works first, the prestressed tendons are tensioned to a predetermined stress value, and then a jacking telescopic part works to push a reverse pressing plate to push and press a working jacket, so that a working anchor clamps the prestressed tendons, sliding of the prestressed tendons canbe reduced; compared with a traditional tensioning system, the automatic control method can reduce stress loss, avoid excessive tensioning, better control the tensioning process and improve the tensioning effect, and realize intelligent tensioning monitoring and control by combining with the controller; and intelligence and convenience are achieved, and control accuracy is high.

The invention discloses an X8R-type capacitor ceramic material with a high dielectric constant, which comprises a substrate component and a doping component; the chemical molecular formula of the substrate component is aBaTiO3-bNa0.5Bi0.5TiO3; the chemical molecular formula of the doping component is cYb2O3-dMgO; the chemical expression of the X8R-type capacitor ceramic material with a high dielectric constant is aBaTiO3-bNa0.5Bi0.5TiO3-cYb2O3-dMgO, wherein a=0.88-0.92, b=0.08-0.12, c=0.01-0.015, and d=0.004-0.012. The X8R-type capacitor ceramic material obtained in the invention meets a wide operating temperature range, good temperature stability, a high dielectric constant, and environment friendship for X8R-type multilayer ceramic capacitors.

The invention discloses a horizontal tensioning method for concrete beams strengthened with prestressed fiber cloth, wherein, a spacing is set between one end or both ends of the fiber cloth on the surface of the concrete beam and the surface of the concrete beam, and the one end or both ends are fixed; a horizontal bearing beam is arranged on the outer surface of the ends of the fiber cloth horizontally spanning the set spacing to the concrete beam surface; the fiber cloth is pasted to the concrete beam surface bearing the tension stress and directly fixed by moving the horizontal bearing beam towards the concrete beam surface and coating a cementing agent; the method replaces the traditional vertical tensioning fiber cloth with the horizontal tensioning one, and the horizontal tension requires only 1 / 5 to 1 / 7 of vertical tension to achieve the same tensioning effect, so as to significantly lower the requirements for tension equipment and technique; the method adopts simple equipment, has low manufacture cost and is easy to transport and carry, the fiber cloth bears the stress evenly in the tensioning process so as to achieve the good effect of tensioning, and the tension operation only results in small damage to the original concrete structure; and the method can significantly save the construction cost, reduce construction risks and shorten the construction period, so as toachieve the significant comprehensive technical and economic efficiency.