9results about How to "Safe and efficient construction" patented technology

The invention discloses a workover treatment efficient dismounting device based on a hydraulic boosting system and an operation method. The workover treatment efficient dismounting device comprises a supercharger and a back striking wrench. The supercharger comprises a shell, an oil way core, a throttling valve, an overflow valve, a control valve and a filter are installed in the shell, a supercharging module, an operating handle, an input inlet, an input outlet, a pressure measuring connector, an output inlet and an output outlet are installed outside the shell, the operating handle is connected with the control valve, and the supercharging module is connected with the filter. The back beating wrench comprises a bent handle, and the head of the bent handle is connected with a jackscrew. According to the invention, the function of dismounting rusted screws by using the low-pressure hydraulic pump of the workover rig in a manner of driving liquid with liquid is realized, the operation construction efficiency is improved, and the potential safety hazard of operation is eliminated.

This utility model proposes an operating platform with a casting base plate for precast beam diaphragms, belonging to the field of bridge engineering technology. It solves the problems of insufficient rigidity in casting molds assembled with wooden templates and tie bolts, leading to diaphragm collapse, insufficient concrete density, unstable lifting frame construction, and high construction costs. It includes a rectangular plate and multiple horizontal braces. The two ends of the rectangular plate are locking and fixing sections, and the middle section is the casting section. The casting section has multiple vertically oriented lifting and fixing through holes. The multiple horizontal braces are parallel to each other and located in the same horizontal plane, fixedly connected to the casting section. The length direction of the multiple horizontal braces is perpendicular to the long side direction of the rectangular plate. The upper surface of the locking and fixing section contacts the bottom surfaces of the precast beams on both sides. It is mainly used for the casting construction of precast beam diaphragms.

The disclosed urban rail transit thin-wall mixed U-shaped beam industrial construction method and construction system carries out the construction of U-shaped beam beam manufacturing pedestal and beam storage tensioning pedestal in the site; carries out the U-shaped beam steel bar binding and the installation of the prestressed steel bundle on the U-shaped beam mold frame, and hoists the U-shaped beam steel cage to the beam manufacturing pedestal through a hanger; after the U-shaped beam steel cage is positioned, the embedded part, the U-shaped beam inner mold and the support system are installed; the thin-wall mixed U-shaped beam structure is optimized; the first tensioning prestressed bundle is constructed; the beam body concrete is poured; the first tensioning prestressed bundle is released and cut; the two U-shaped beams are respectively hoisted to the beam storage tensioning pedestal by using a gantry crane; the second tensioning prestressed bundle is constructed; the hole is grouted and sealed; after the overall operation is completed, the quartz sand is discharged through the steel sand box sand discharge hole, so that the U-shaped beam is lowered to the concrete base of the beam storage tensioning pedestal. The present application comprehensively and systematically solves the problems of large waste of original technical resources and low production efficiency.

The present application relates to the technical field of net rack structure reinforcement, and particularly relates to a welding-free full-assembled net rack rod piece reinforcement device and method. The device comprises: a fixed center bearing frame for reinforcing a circular tube component; a telescopic vertical sliding inclined strut assembly arranged between two adjacent vertical fixed vertical rods; an assembled sectional sleeve assembly for fixing the fixed center bearing frame outside the circular tube component; a cable body for connecting two connecting bases on the fixed center bearing frame; and a tensioning adjusting mechanism for adjusting the tension of the cable body. The welding-free full-assembled net rack rod piece reinforcement device and method provided by the present application adopts a welding-free full-assembled construction process, and the components are standardized prefabricated in a factory. The components are only assembled by bolts and pins at the site, so that the construction is safe and efficient, welding damage is avoided, and the original structure performance is not affected. The components are connected by bolts, so that the components are convenient to disassemble and assemble, the components can be recycled and reused, and the engineering cost is reduced.

The invention discloses a desulfurizing agent for acidizing a sulfur-containing reservoir, which is prepared from the following components in percentage by volume: 20 to 30 percent of compound complex iron reagent, 15 to 20 percent of amine reagent, 5 to 15 percent of activating agent and 35 to 60 percent of solvent water, and the sum of the volume contents of the components is 100 percent. The desulfurizing agent for acidification of the sulfur-containing reservoir solves the problems that in the prior art, the compatibility of a desulfurizing agent and other reagents in the acidification process is poor, and the acting effect is affected. The invention further discloses a preparation method of the desulfurizing agent for acidification of the sulfur-containing reservoir.

The invention discloses a construction method for a shield under-crossing river section, and belongs to the technical field of tunnel engineering construction. Aiming at the problems of high water inrush and mud inrush risk, difficult settlement control, unbalanced efficiency and cost and the like confronted by water-rich karst stratum shield construction, the method realizes safe and efficient construction through a five-in-one technical system of investigation, reinforcement, regulation and control, monitoring and emergency; a high-pressure jet grouting pile anti-seepage curtain, a reinforcing mesh and an anchor rod are compounded to reinforce a riverbed, shield propulsion parameters and a grouting system are dynamically optimized in a double-stage mode to be matched with a complex stratum, a monitoring system is constructed, yellow-orange-red three-stage early warning adjustment is conducted, and accurate treatment measures are formulated according to reserve special emergency materials. According to the method, riverbed settlement is controlled within 3 mm, the construction efficiency is improved by 25%-30%, the engineering cost is reduced by 15%-20%, the influence on river ecology is small, and the method is suitable for river crossing construction of tunnel engineering such as subways and municipal pipelines.

The utility model relates to the field of building installation, in particular to a small component for temporarily fixing nuts during installation of embedded parts, which comprises two cross beam reinforcing steel bars, a plurality of longitudinal beam reinforcing steel bars arranged between the two cross beam reinforcing steel bars and a plurality of groups of nuts arranged at two ends of the longitudinal beam reinforcing steel bars. The two nuts are installed on the lower right portions of the two intersection points of the cross beam steel bar and the longitudinal beam steel bar respectively. The device is low in investment, good in effect, safe and efficient in construction and high in installation precision, and the problems of insufficient precision of independent field installation, difficulty in nut position adjustment and the like are solved.

This invention discloses a sliding directional drilling feed force control method based on equivalent input disturbances, comprising: establishing a mathematical model for pressure reducing valve control, obtaining the mapping relationship between electromagnet current and pressure reducing valve outlet pressure, and modeling and controlling the directional drilling rig feed system; modeling includes: constructing the transfer function of the directional drilling rig feed system and establishing the state-space equation of the directional drilling rig feed system; control includes: establishing a control structure based on equivalent input disturbance estimation and compensation, specifically designing a state feedback controller, a state observer, and an equivalent input disturbance estimator, to achieve stable operation of the sliding directional drilling feed force closed-loop control system, enabling the system to have good tracking and disturbance suppression functions, and providing a control research foundation for ensuring the working performance of the directional drilling rig and the safe and efficient construction of directional drilling holes.