37results about How to "Less construction equipment" patented technology

The invention relates to online fracturing fluid and a preparation method therefor. The online fracturing fluid contains the ingredients in parts by mass: 0.8-5 parts of agent A, 0.2-1 part of agent B and 94-99 parts of water; the agent A contains the ingredients in parts by mass: 10-20 parts of chitin, 10-20 parts of starch, 5-20 parts of acrylamide, 2-5 parts of bioactivator, 0.1-1 part of sugar, 0.1-0.5 part of sodium polyaspartate, 10-20 parts of environment-friendly solvent and 13.5-62.8 parts of water; and the agent B contains the ingredients in parts by mass: 5-20 parts of alkaline proteinase, 10-20 parts of bioactivator, 5-10 parts of EDTA-4Na, 0.1-0.2 part of sodium ethylenediamine disuccinate, 0.5-1 part of sodium polyaspartate, 0.2-1 part of sodium acetate, 0.5-1 part of sodium lactate, 0.5-1 part of potassium lactate, 0.5-1 part of sugar, 5-10 parts of ethanol and 34.8-72.7 parts of water. The online fracturing fluid has the characteristics that online continuous preparation is achieved, the operation is simple, the working concentration is low, the viscosifying speed is high, the sand carrying performance is good, the friction drag is low, the damage is low, the online fracturing fluid is heat-resistant and shear-resistant, the viscosity of flowback fluid is low, the applicable range is wide, the cost is low, the production increase effect is good, and the like.

The invention provides a construction method for using a cable crane for overturning an arch bridge arch rib. The method includes the steps that an arch rib section to be overturned is transported to the position of a lifting point below the crane, the lifting point of the crane descends, a fixed pulley is connected to the position below the lifting point, a steel wire rope penetrates the fixed pulley below the lifting point, the two ends of the steel wire rope are connected with two upper chords of the arch rib, the lifting point and a lower chord, located at the upper portion, of the arch rib section are connected through a chain block, the lifting point is lifted at the constant speed, and the upper chord, located at the lower portion, of the arch rib section is away from the ground and is overturned upwards; in the lifting point lifting process, the chain block is loosened continuously till the arch rib section is overturned by 45 degrees, and the chain block and the steel wire rope are in the same stress state; and then the chain block is loosened, so that the arch rib section is overturned continuously, meanwhile, the lifting point descends at the constant speed, the steel wire rope is in the stress state all the time in the lifting point descending process, finally, the arch rib section is overturned continuously by 45 degrees, and therefore the arch rib section is overturned by 90 degrees.

The invention discloses a device for realizing operation of a mobile tower crane on a structural floor and a construction method. The device comprises transfer beams, track beams and guide tracks. A plurality of parallel transfer beams are arranged on floor structure columns. Two parallel track beams which are used for installing the guide tracks are perpendicularly laid between the transverse beams. The construction method of the device for realizing operation of the mobile tower crane on the structural floor mainly comprises the following steps of: 1, setting the positions of the transfer beams and the track beams according to building floor structure layout; 2, calculating specifications of the transfer beams and the track beams according to wheel pressure, wind load and braking force of the used mobile tower crane; 3, installing embedded parts on the floor structure columns at the positions where the transfer beams are required to be fixed; 4, installing the transfer beams and the track beams; and 5, laying the guide tracks. The device for realizing operation of the mobile tower crane on the structural floor and the construction method have the advantages that the structure construction difficulty caused by large single-layer building area is overcome, the investment on mechanical equipment during construction is reduced, the construction period is shortened, the construction cost is saved and the construction efficiency is improved.

The invention discloses a press and pull force converting device with an I-shaped structure, which comprises a pressure device, an upper press block and a lower press block, wherein, two jacking sections are formed by the step that the inner sides of the two sides of the grooved structures of the upper block and the lower block are bent towards the middle; the two jacking sections of the upper press block are respectively positioned at the two sides of an I-shaped web plate and are pressed downwards under a lower margin plate of the I-shaped structure, while the two jacking sections of the upper press block are respectively positioned at the two sides of the I-shaped web plate and are pressed downwards under an upper margin plate of the I-shaped structure; an upper load-bearing plate of the pressure device is arranged at the upper part of the upper press block, while a lower load-bearing plate thereof is arranged at the lower part of the lower press block; the device of the invention achieves pull resisting similar to the I-shaped structure by using a common pressure machine and arranges a ground anchor or assembles devices, such as a huge counter-force frame, and the like, in a preset filed, thereby greatly simplifies process, saving a large amount of rolled steel, avoiding the assembly of huge steel members, requiring no high measure costs for assembly, handling safety facilities, and the like, and improving working efficiency; during an anti-pull process, the integrity of the structure is increased remarkably and safety risk is greatly lowered, thus ensuring safety.