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171results about How to "High security risk" patented technology

Hoisting construction method for oversized span steel truss of roof of stadium grandstand

The invention discloses a hoisting construction method for an oversized span steel truss of a roof of a stadium grandstand. The hoisting construction method comprises the following steps that A construction preparation work is conducted; B temporary supporting frames are mounted; C test hoisting is conducted; D trusses are symmetrically hoisted from two ends to the inner side in a sectioning mode; E concrete is poured into main truss arch feet; F purlins are mounted; G preliminary acceptance and supplement brushing of anti-corrosion and fireproof paint are conducted; H the temporary supporting frames are unloaded; J inspection and acceptance are conducted; and M the temporary supporting frames are dismounted. According to calculation of the hoisting weight and the length of hoisting parts, the large span steel truss is sectioned and assembled on the ground firstly, and then aerial butt joint hoisting is conducted, so that the construction period can be effectively saved, and mounting cost can be effectively reduced. The sectioned steel trusses adopt the temporary supporting frames to conduct temporary support, unloading supporting seats on the top of the supporting frames are welded to the steel trusses, and the load of a mounted main truss is borne by the temporary supporting frames, so that mounting safety of the steel truss is guaranteed, and compared with whole audience supporting frame erecting, cost is greatly saved.
Owner:河南靖扬建设工程有限公司

Automatic terminal fitting device for a four-pin electrical connector

The present invention relates to an automatic terminal fitting device for four-pin electrical connector which may comprise a rack, power control box and conveying device provided on the rack. A rubber shell vibration disc, a terminal fitting mechanism, and a back cover vibration disc are provided on the rack along the transporting direction. The rubber shell vibration disc is connected to the front end of the conveying device by a rubber shell transportation rail. The terminal fitting mechanism is provided on the back side of the conveying device and engages with the terminal feeding device provided on the rack. The back cover vibration disc is provided on the back side of the conveying device, to the right side of the terminal fitting mechanism. And the terminal fitting mechanism may include four sets of terminal fitting devices sequentially provided on the back side of the conveying device. On the right side of the terminal fitting devices, a terminal strip bending device engaging with the conveying device is provided. The present invention effectively addresses the problems existing when fitting terminals manually during assembly, such as low production efficiency, high manpower consumption, intensive labor investment, relatively high potential safety hazard occurrence, and unsatisfactory connector defect rate.
Owner:DONGGUAN UNIV OF TECH

Full-set dismantling and installing construction method of bridge overpassing existing line

The invention discloses a full-set dismantling and installing construction method of a bridge overpassing an existing line. Full-set dismantling and installing construction is conducted on a plurality of beam segments needing to be dismantled of a used beam to be dismantled from front to back. The full-set dismantling and installing construction method comprises the steps that firstly, a pavement layer of the bridge surface is milled; secondly, roof-propping is conducted on the beam segments; thirdly, preparatory work is conducted before hoisting; fourthly, hoisting and moving-out are conducted; fifthly, one beam segment is installed after replacement; sixthly, full-set dismantling and installing construction of the next beam segment is conducted, specifically, full-set dismantling and installing construction is conducted on the next beam segment needing to be dismantled of the used beam to be dismantled according to the first step to the fifth step of the method; and seventhly, the sixth step is repeated once or more than once till full-set dismantling and installing construction of all the beam segments needing to the dismantled in the used beam to be dismantled is completed. The method is simple in step, reasonable in design, easy and convenient to implement and good in using effect, full-set dismantling and installing construction of the bridge overpassing the existing line can be completed easily, conveniently and rapidly, the construction process is safe and reliable, the construction period is short, and the method is economical and practical.
Owner:中铁二十局集团第三工程有限公司

Construction method for ground cable hanging and aerial butt joint of ultra-large-span prestressed pipe truss

InactiveCN111042540AGood effectWorking at heights for a long timeGirdersJoistsButt jointPre stress
The invention discloses a construction method for ground cable hanging and aerial butt joint of an ultra-large-span prestressed pipe truss. The construction method is characterized in that the ultra-large-span prestressed pipe truss is divided into three sections A, B and C according to the characteristics of the ultra-large-span prestressed pipe truss structure, each section is assembled on the ground through a jig frame, and after the procedures of jig separation, transportation, overturning, hoisting and the like, the sections A and C are hoisted to a designed position at first; the sectionB is divided into a subsection B1 and a subjection B2 and spliced on the ground through a jig frame, after jig separation, the subsections B1 and B2 are sequentially hoisted to a ground support framefor aerial butt joint, a prestressed steel inhaul cable is hung, and the steel inhaul cable is primary tensioned according to a simulation checking result; and after primary tensioning, the section Bis hoisted to the designed position through two machines to be in aerial butt joint with the section A and the section C, after butt joint is finished, a connecting truss is installed, the steel inhaul cable is finally tensioned according to the simulation checking result, and the ultra-large-span prestressed pipe truss is installed. The construction method highlights the characteristics of highconstruction speed, low cost, low safety risk, high construction quality and the like in the operation process.
Owner:XUZHOU ZM BESTA HEAVY STEEL STRUCTURE +2

Integral aerial steel wire rope oil removing and lubricating device

ActiveCN108622803ASolve the problem of inconvenient oil removal and lubricationRealize automatic degreasingCleaning using toolsLoad-engaging elementsOperation modeLubrication
The invention relates to an integral aerial steel wire rope oil removing and lubricating device. The device comprises an oil removing mechanism, a cable walking mechanism and an oil coating mechanism;the oil removing mechanism and the oil coating mechanism are positioned on two sides of the cable walking mechanism; the oil removing mechanism comprises a brush, a brush base and an oil collecting tank; the brush and the brush base are of symmetric buckling structures; the oil collecting tank is positioned at the lower part of the brush; the cable waslking mechanism comprises a shell, a first walking wheel mechanism and a second walking wheel mechanism; the shell comprises a first shell and a second shell symmetrically mounted; the first walking wheel mechanism is mounted in the first shell;the second walking wheel mechanism is mounted in the second shell; the first walking wheel mechanism and the second walking wheel mechanism tightly hold a steel wire rope, and drive the oil removingmechanism and the oil coating mechanism to walk; and the oil coating mechanism is an oil cylinder mounted in an opposite buckling manner. The device is compact in structure and less in occupied space,can realize efficient and convenient lubrication of the crane steel wire rope, and changes a traditional operation mode with low manual coating efficiency and high safety risk.
Owner:TIANJIN UNIV OF SCI & TECH

Vehicle door emergency unlocking control method and vehicle door system

The invention discloses a vehicle door emergency unlocking control method and a vehicle door system. The method comprises the steps that firstly, a protection cover plate of an emergency exit device is opened when a handle needs to be operated, or the handle of the emergency exit device is operated at a small angle which cannot unlock a vehicle door after the protection cover plate is opened; if the vehicle is in a fault power loss condition, the handle of the emergency exit device is released by a handle control structure, and the handle is allowed to be operated; if not, a vehicle door evacuation request loop is activated, and an evacuation request signal is sent to a train signal system by the vehicle door evacuation request loop; and after receiving the evacuation request signal, the train signal system controls the train to stop in a safe area so as to activate a zero-speed train line signal and controls the train door to forbid unlocking of the train line signal to be invalid, sothat the handle is controlled to be released by the handle control structure to allow the handle to operate. According to the method, the safety of whether the vehicle door can be manually opened ornot is improved, and therefore safe evacuation of passengers is better guaranteed.
Owner:ZHUZHOU ELECTRIC LOCOMOTIVE CO

Insulating operating rod having trimming function

The invention discloses an insulating operating rod having a pruning function. The insulating operating rod having the pruning function comprises an insulating operating rod; an operating head is connected to the front end of the insulating operating rod; a semilunar hooked knife and a hanging hook component are arranged on the operating head; a downward lateral side of the hooked knife is provided with a knife edge; the hanging hook component is a solid galvanized steel bar; a tail end of the hanging hook component is connected with the operating head in a full welding mode; a middle section of the hanging hook component is perpendicular to the insulating operating rod; the upper surface of the middle section of the hanging hook component is provided with a buffering cushion layer; a head of the hanging hook component bent upward to form into a positioning hook; the insulating operating rod is connected with the operating head through a connecting head; a position on the operating head, which is arranged under the hanging hook component, is provided with a fan. The insulating operating rod having the pruning function has the advantages of allowing branch pruning with electricity, guaranteeing operation and maintenance personnel security, effectively hanging a falling type fuse, avoiding the falling type fuse falling off from the insulating operating rod during operation, reducing damage to personnel on the rod and the ground, shortening the first-aid repair time, avoiding unnecessary work delay and improving the utilization safety.
Owner:STATE GRID CORP OF CHINA +2

Transmission line unmanned aerial vehicle and electric lifting device combined live working method

The present invention belongs to the technical field of electric lifting machine and live line operation and particularly relates to a transmission line unmanned aerial vehicle and electric lifting device combined live working method. An unmanned aerial vehicle is used to suspend an insulation rope to a conductive wire, a semi-static rope is dragged through the insulation rope to suspend the semi-static rope to the conductive wire, an equipotential electrician operates a small fly people machine to enter a strong electric field and reach a live line to carry out defective elimination operation. The method comprises the steps of setting the unmanned aerial vehicle and the insulation rope, checking the unmanned aerial vehicle, throwing the rope through the unmanned aerial vehicle, dragging the semi-static rope, installing the semi-static rope, installing the small fly people machine and a buffer self-locking device, carrying out equipotential electrician checking and connection, lifting the equipotential electrician by the small fly people machine and completing potential transfer, hanging a hard insulation ladder head and carrying out translocation, entering into equipotential to hang an extension rope to eliminate a defect, and exiting the equipotential. An operator is lifting by using the small fly people machine to reach a live line defective position, climbing an iron tower and a soft ladder to enter and leave the strong electric field is not needed, the safety risk is small, the working efficiency is high, and the operation is simple.
Owner:国网甘肃省电力公司超高压公司

Rapid repair method for three-stand-column structure bridge with damaged lateral stand columns and undamaged beam and slab structure

The invention belongs to the technical field of traffic and municipal engineering, and discloses a rapid repair method for a three-stand-column structure bridge with damaged lateral stand columns and an undamaged beam and slab structure. For the three-stand-column structure bridge, when the stand columns on one or two sides are damaged, and the upper beam and slab structure is not damaged, the damaged stand columns and a capping beam on the lower portion of a beam and slab are directly replaced or repaired without dismantling the bridge beam and slab, and through temporarily supporting the capping beam, integrally jacking box girders, removing the damaged stand columns and the capping beam in a chiseling mode and pouring new stand columns and a new capping beam, conversion of a stress system is completed finally. According to the technical scheme, through counter-pressure unloading and temporary support erecting, the capping beam is primarily fixed, the stableness of the stress system of the whole bridge is ensured, then through designing an integral jacking system of the box girders, the new stand columns and the new capping beam are built and erected, and therefore stabilization and replacement of the whole stress system are completed. The scientific and reasonable construction scheme is made to ensure smooth progressing of projects.
Owner:HENAN HIGHWAY ENG GROUP

Method for lifting roof girders and purlines at the same time

The invention relates to a method for lifting roof girders and purlines at the same time. According to the method, auxiliary steel pipes serve as supporting pieces, a plurality of purlines or purlines and roof girders are assembled into a whole on the ground, the angle of the position of a crane rope is adjusted, and the overall inclination of the purlines and the roof girders is made to be the same as the roof gradient; then, the purlines and roof girders are lifted to the corresponding position of the rood girders as a whole and mounted in sequence, and the auxiliary steel pipes are removed after mounting is completed. According to the method, three mounting schemes that the two auxiliary steel pipes are used at the same time, one auxiliary steel pipe and one roof girder are used, and one auxiliary steel pipe and two roof girders are used are provided, the angle and lifting schemes are adjusted flexibly according to the construction filed situation, construction can be carried out along with building projects, and engineering advance is promoted; meanwhile, the problems that a traditional mounting process is low in construction speed, poor in quality, high in risk and low in benefit are solved, the construction period is shortened, quality is promoted, and safety guarantee is enhanced.
Owner:ASIA DAIRY FAB

Method for one-step in-situ electro-deposition of layered double hydroxide coating on magnesium alloy surface

The invention provides a method for one-step in-situ electro-deposition of a layered double hydroxide coating on a magnesium alloy surface. The method includes the following steps that firstly, pretreatment is conducted and includes mechanical polishing and oil removing and grease removing, wherein oil removing includes acetone ultrasonic oil removing and alkaline oil removing; secondly, electro-deposition solution preparing and electro-deposition are conducted, wherein an electro-deposition solution of nitrate is prepared through distilled water, and electro-deposition is conducted in the above electro-deposition solution with a magnesium alloy being the work electrode and a platinum sheet being the counter electrode; and thirdly, the distilled water is used for flushing a sample obtainedthrough electro-deposition, the sample is dried in an oven or directly subjected to cold air blowing, and a magnesium alloy sample with an LDH film layer deposited is obtained. The method is achievedat the normal temperature and normal pressure, safety risks of production are lowered, the film forming speed is high compared with tens of hours or several tens of hours of a hydrothermal method, and LDH powder does not need to be prepared in advance or a pulse power source does not need to be used for deposition in multiple steps with various solutions.
Owner:CHINA WEST NORMAL UNIVERSITY

Crossing existing line bridge girder dismounting method

The invention discloses a crossing existing line bridge girder dismounting method. A dismounted bridge girder is a girder crossing an existing railway line and is formed by splicing a plurality of girder segments to be dismounted from front to back. During complete set dismounting construction of any segment to be dismounted, the process comprises the following steps that firstly, a bridge deck pavement is milled, specifically, the bridge deck pavement of the girder segment constructed currently is milled; secondly, the girder segment is jacked up, specifically, the girder segment constructed currently is horizontally jacked upwards through a vertical jacking device, so that the girder segment constructed currently is separated from two supporting piers; thirdly, preparation operation before hoisting is conducted; and fourthly, the girder segment constructed currently is horizontally hoisted upwards through a bridge girder erection machine and moved to the outer sides of the two supporting piers. The method is simple in step, reasonable in design, easy and convenient to construct and good in application effect, the complete set dismounting construction process of the crossing existing line bridge girder can be completed easily, conveniently and rapidly, and the construction process is safe and reliable, the construction period is short, and the method is economic and practical.
Owner:中铁二十局集团第三工程有限公司

Single-line single-span railway steel truss girder dragging installation construction method and single-line single-span railway

The invention relates to a single-line single-span railway steel truss girder dragging installation construction method. The method comprises the following construction steps of S1, temporary supportand slide way girder installation, including behind-abutment roadbed section temporary support and slide way girder installation, inter-abutment temporary support and slide way girder installation, inter-pier temporary support and slide way girder installation and pier side temporary support and slide way girder installation; S2, front guide beam and steel truss girder behind-abutment assembling;S3, manufacturing and installing of a sliding block, including arrangement of the sliding block at a lower chord part between the large sections of the steel truss girder; S4, manufacturing and installing of a dragging device, including manufacturing and installing of a jack dragging horizontal counter-force seat, manufacturing and installing a rear anchoring device and penetrating and dragging ofa steel strand bundle; S5, dragging of a part of the steel truss girder; S6, dismounting of the temporary support, including dismounting of the sliding block and dismounting of the support; and S7, beam falling in place. The invention further relates to a single-line single-span railway obtained through the construction method. The construction method is advanced, engineering quality, safety andcontrollability are achieved, and the construction period is effectively shortened.
Owner:CHINA RAILWAY NO 9 GRP NO 7 ENG CO LTD
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