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Erecting machine safety - Check 1. Check the hook part of the hook markers and anti-off device meets the requirements, the hook for cracks, delamination and other defects; hook wear section, increase the amount of the opening degree of torsional deformation, It is exceeded; hook neck and face or without fatigue deformation, cracks and associated pin, jacket wear. 2. Check the wire rope wire rope specifications, models and matching pulley reel meets the design requirements. Plate, Shengka, lease and other pieces rope rope fixed end fixtures to meet the requirements. Rope wear, broken wires, kinks, crushed, bent, broken stocks, corrosion, etc. are exceeded. 3. Set the brake device brakes, brake type meets the design requirements, the brake lever, spring or without fatigue deformation, cracks and other defects; pins, spindles, brake wheel, brake pads for excessive wear, hydraulic brake oil leaks; brake clearance adjustment, the braking capacity can meet the requirements. The body of roll, tube edge or without fatigue cracks, damage, etc.; rope grooves and cylinder wall wear is excessive; drum rim height and rope winding layers can match; guide rope, rope row the work meets the requirements; 5. whether there is anti-off pulley rope pulley groove means; rope pulley groove rim for cracks, broken edges, excessive wear and other conditions, pulley rotation is flexible. 6. The gear reducer runtime Have intense sound of metal friction, vibration, radiation and other unusual sound shell; shaft is sealed intact, loose bolts and other conditions have defects; gear lubricant selection, oil level, Li reducer lubricating oil pump is running, open gear lubrication compliance. 7. tread wheel wheels, axles whether fatigue cracks phenomenon, wheel axle wear is excessive. Whether skew phenomenon running. What causes skew is. 8. Coupling Coupling Have defect parts, loose connections, run impact of the phenomenon. Erecting machine rental couplings, pin, shaft pin hole, buffer rubber ring wear is excessive. Coupling the two parts are connected are concentric. A major component Edit to JQ900A gantry double main beam three legs bridge machine, for example, mainly by the machine arm, One crane car, crane trolley II, One column, on the 2nd column, third column, hydraulic part of the system, electrical system, diesel generator sets, and security monitoring systems (Figure 1). JQ900A frame girder type bridge work a simple support for cross-type girder by girder vehicle YL900 type bridge girder to the rear beam feeding machine, lifting beams to take the car lifting beam haul air trim in place box beam position , erecting machine with hydraulic drive tire Traveling, walking vertical shift vias practices. You can set up 32m, 24m, 20m Double Line Box Girder adapt erection minimum curve radius R5500m, adapt erected maximum vertical gradient 20 ‰, rated lifting 900t. 1, machine-arm machine arm is carrying the main bridge beams, double box girder structure, according to the force conditions and finite element analysis and calculation of the machine arm, each box girder design into a box-section deformation. Full length 66.0m, box girder high 3.0m, divided into six segments section; two main beam center distance 9m, between segments coupled with high strength bolts. After the disintegration of the segment by road or rail. JQ900A bridge machine machine arm structure of the machine arm cover spread Traveling with a crane trolley track, one column at between II and bottom flange plate is provided under the cover for One column bracket, hanging round trip walk track. The arm and the second, third column by high-strength bolted connection, when One column vertical shift with machine arm relative motion, when girder prop hanging round group by the positioning device and machine articulated arm. The arm ends are connected together by cross-linking, II and III pillar and the machine arm by high-strength bolted connection. One column vertical shift when the machine arm with relative motion, time frame beam by localization device and machine articulated arm is fixed. II and III pillar parts used cross-linking saddle connection can be further improved lateral stiffness of connection between the machine arm, saddle-shaped structure both to ensure the passage of lifting the car, but also improve the lateral integrity of the machine. Principal Section laying machine arm machine arm cover lifting trolley Traveling track, the inside of the lid has a lifting trolley guide rail (right); One column has traveled down the ear on the front portion of the column cover II Liang. The arm has a front cover men change across nodes, One column provide different mounting positions to meet 32m, 24m, 20m box girder construction needs work. When the bridge machine vertical shift, front and rear One column beams along the machine arm Traveling ear when girder node positioning device and machine through fixed articulated arm. 2.2, lifting car JQ900A type bridge machine is equipped with two lifting car, we have a separate lifting mechanism, running mechanism and sliding mechanism. Each car is equipped with two separate crane hoisting mechanism, after the car left and right sets of hoisting mechanism lifting point by equalizing force balance mechanism, thus four lifting points lifting beam bridge machine job into a three hanging points, so that box girder under load balanced, smooth landing. Lifting trolley with three-dimensional motion and jog function, to ensure accurate alignment box girder installation. Lifting traditional motor - reducer - roll mode, running through a hydraulic motor driven drag chain runs in the machine arm, cylinder push trolley traverse traverse. Lifting, walking speed stepless lifting mechanism with inverter variable speed, smooth and reliable; travel driver variable pump - variable motor systems, a larger speed range can be further improved operating efficiency. Figure crane lifting trolley car used to construct concave structure frame (as shown above right). Traveling mechanism using chain drive traction, heavy movement of devices bearing Traveling way. Lifting trolley lifting mechanism is motor, planetary gear reducer concealed winch drive. The lifting mechanism of the high-speed shaft and the drum brakes are equipped with high-speed axle hydraulic brake push rod connected by a gear coupling with brake wheel brake as a routine operation between the motor and reducer; low level hydraulic disc brake as an emergency brake, to ensure safe and reliable operation lifting beam. Lifting mechanism includes lifting winches, moving pulley block, fixed pulley block and balanced pulleys, pulley ratio of 2 × 16, wherein the equalizer pulley rack mounted load sensor, real-time reflected lifting load. Hoisting winch motor drive planetary gear reducer Built hoist motor comes with brakes. Racking trolley car floorplan lifting winch mechanism with active row rope rope, rope controlled by variable frequency motor, sprockets, chains, screw, nut, guide rods, bearings and guide roller drive mechanism and other components. It is a servo system, a closed loop control and hoist. Windlass revolution, the guide roller rope traversing a distance of rope diameter. One end of the guide rollers go, finished rope wound on one reel, the guide roller by the proximity switch reverse movement start of the second layer of rope wound. 2.3 One Column One column is the front leg bridge machine is supported on a support pad before half stone in front of the pier. Mainly by hanging round care institutions, folding columns, telescopic column and other components. When working with the machine girder longitudinal arm fixed to the hinge structure, it becomes flexible leg, and the machine arm, composition II column gantry structure to meet the girder supporting job requirements. Vertical shift relative motion between the job and the machine arm One column, achieve vertical shift walking bridge machine. One column has a folding mechanism, to meet the normal girder and box girder One last column abutment support needs. One column with the machine arm has three fixed positions to meet three different span box girder erection. Hanging round care institution by a roller set, hanging wheels, hanging round prop planes, guides and vertical positioning pins and other components. One column has four roller set, around the two groups, as a slave type, at the front end of the machine arm below the support machine arm cover web. Idler wheels hanging rack mounted, so each two groups hanging in the machine arm ear beam, the whole One column can be driven back and forth along the machine arm hanging ear Beam Traveling wheel. Three column bridge machine Traveling drive mechanism and One pillar prop hanging round group with effect under vertical shift operation is completed. In order to reduce friction when erecting machine vertical shift, so that the whole structure is more compact, care, hanging round designed to free the rim, so need to set the guide means, each holder hanging round body under the machine arm on each side of the ear Beam There are two guides, the bridge machine vertical shift and serves as a guide when One column along the longitudinal movement of the machine arm. Roller frame and cylinder coupled to the hinge pin, prop hanging round rack mounted vertical shift pin, when One column longitudinal move bits between the machine arm and One column using pin positioned to achieve One column and fixed hinge connecting the machine arm. One post on the pier supporting Figure 2.4, on the 2nd column II machine arm is located in central column (pictured), and the machine arm consolidation is "gantry" structure rigid legs. For the "O" shaped gantry structure, according to its mechanical characteristics, the gantry plane designed wider at the form, in order to improve the rigidity of the main girder connections. Stable support pillar II requirements under the crossbar with two legs, to achieve the support sleepers support pad and removal by hydraulic cylinders, met vertical shift Huanbu and girder job. Traverse mechanism provided under the two legs, pushing through the sliding cylinder II column driven machine arm swing, thereby bridging Position horizontal adjustment, adaptation curve girder needs. Since the mule bridge girder vehicle mechanic conditions required under beam designed removable. II Column Chart 2.5, third column Three columns are erecting machine vertical shift drive column, in order to meet feed beam by beam carrier and erecting machine vertical shift drive requirements, designed to mast structure. The lifting column, folding mechanisms, running, hydraulic suspension equalization device, a steering mechanism and other components (see figure). Three pillar structure diagram lifting columns, folding mechanism make two support columns Three stations - wide and narrow-type support-type support. Beam carrier beam feeding the job, erecting machine Three pole lifting leg and placed outside walking wheel group formed WIDE support beam carrier beam can be uploaded from the inside by column III, complete beam feeding operations, and box beam free exit is completely lifted off the roof surface Beam, girder and the girder parallel operations, improve operational efficiency. Since the lifting beam position immediately take the car number two post, so when you take the beam column III counterforce small. Furthermore, since the Three columns were tire support, ground larger, in order to address the impact on the already erected varying time frame box girder span beams Three columns construction loads. When erecting machine vertical shift work, Three columns inward swinging walking wheel group, and supported above the box girder webs, forming a narrow type support, running the drive mechanism driving column III bridge machine forward vertical shift. Locking pin when the lifting column lift cylinder pushing through implementation, operations and girder Traveling jobs. There are several holes between the inner and outer lifting column column by adjusting one, third column bolt holes can adjust the machine arm longitudinal levelness, it is not more than 7 ‰ Three columns of tires hydraulic drive courses, 8 axle shaft 16 pairs, 32 tires, of which 12 tires for the drive wheels. Traveling is driven by the high-speed motor drive wheels via a planetary gear drive tire rim achieve walking, variable pump - fixed displacement motor hydraulic circuit, each of the driving wheels are equipped with brake function group. Three columns walking wheel group traveled through different terrain wheels, hydraulic suspension cylinders able to walk the line for vertical axle compensation, and various walking wheel under load balancing. Traveling at the same time the right amount of swing axle may be laterally to accommodate lines cross slope situation. Wheel walk in cross slope situation JQ900A bridge machine tire self Traveling via mode operation, consider erecting machine Traveling curve large radius, steering operations infrequently, according walking wheel group structure arrangement, the use of deflection walking wheel set type Steering Type (tire cranes more use). Traveling on the Three column wheel steering mechanism set up to promote the bridge machine machine arm along One pillar supporting rollers forward (right). 16 walking wheel group III column was divided into four groups of four walk the line between wheels connected by a link from a steering cylinder contribute to the achievement steering, it has the same steering angle. Erection Machine vias Running speed control within 3m / min, and is set close to the expected reduction measures to ensure the safety of operations vias. Go laterally offset rows wheel controlled within ± 30mm. JQ900A erecting machine Three steering modes schematic Traveling column driving means by a hydraulic motor, gear wheel, rubber tires, III column drive means is arranged as shown. Three columns of each group were walking wheel equipped with a hydraulic suspension equalization device, to ensure that each wheel when walking the force balance. [1] 2 classification editing on road, rail track running for the entire cross erected a small cross-beam bridge construction machinery. Bridge its high efficiency, the Chinese railway bridge design standards, more consideration for its erection design principles. Its massive body beyond gauge railway transport shall be the disintegration of transportation, after reaching the site, then assembled and used. China standing bridge machine has three multi-slice erected for reinforced or prestressed concrete beams. One bridge machine single beam bridge construction machines, the boom is a box girder, forward overhang at its front end has a collapsible legs (the left and right feet rods). The machine can be unloaded in their own state into the bridge site, and then straighten the front post, supported on the front of the pier. When the frame beams (or whole beam) move along the boom, the arm close to the simply supported beam state. After the bridge when the machine can position themselves into the bridge in no-load condition, the beams must first use a special gantry crane on railway flat cars to be transferred from a special Beam car, then this beam carrier and erecting machine end alignment, driving on the bridge with the two lifting beam machine boom car will lift beams along the boom line before arriving at the bridge site off the beam. To meet the curve bridge, the machine can make a few swinging arm in a horizontal plane. Beams in place methods and double cantilever bridge machine in the same manner (moving beam or lining). The machine's advantages are: Cancel counterweight, no longer need the machine to push the roof, feed without bridge girder fork line, increasing mechanization, improved safety performance. Hoist 130 tons of victory bridge erector is such a case. One double cantilever bridge machine bridge construction machinery, the use of this type of the Soviet Union earlier. When introduced in 1948, both before and after the arm with steel beams and hoist 45 tons and 80 tons have two. 1950s, changed the arms frame, hoist development to 130 tons. Such machines are not self-bridge, push the required machine roof. Forearm for hanging beams, hanging counterweight rear arm, front and rear arms can not swing in the horizontal plane. When the bridge, and often have to use a special 80 t Xiaoping car shipped to the beams under the bridge machine forearm hooks (called "Hello beam") before lifting; to make shunting operation convenience, each need to bridge the laying fork line. After girder bridge machine lifted axle load increases, and the bridge of the new embankment relatively soft, therefore, the lifting beam bridge machine traffic area reinforcement measures must be taken, such as using heavy pressure road car, insert the sleeper like. Double-beam bridge machine HQ-erecting machine and prairie-type bridge machine is such, hoist is 130 tons. Its boom is composed of about two box beam, two beams extending through the body and move the rear end. At both ends of each of the legs folded upright rods. In red type two beams distance of 3.4 m, 4.8 m, compared with prairie type. There are two truss box beam across two car can travel along the longitudinal arm. Hanging beam girder trolley into the car can travel along a lateral stringers car. Pending frame beams (or whole beams) can be sent directly to flatbed railroad bridge beneath the rear arm machine, after lifting the car with a lifting beam, with truss car forward, then lifting beams traverse trolley, then fell on the beam bit. Front and rear ends of such machines can bridge crane beams and falling beam; girder when changing direction, do not need to turn around; to adapt curve girder, arm can swing back and forth in a horizontal plane; slice erection when having to move the beam or dial Tao, Liang to place; "Hey beam" does not need the bridge girder fork line or special vehicles. Beam frame immediately after laying, erecting machine in order to continue forward job. The latter two bridge machine generally can be pre-assembled track panel hoisting girder so not because of laying work and delays. In addition to the standing bridge crane, construction unit may produce a variety of temporary bridge machine as needed. As in Jiujiang Bridge south bank of bridge approach construction, it had made a flat hoist 300 tons of special bridge machine, in order to set up the whole span of 40 meters of the hole without ballast pillow prestressed concrete beams. Some construction units also used the scaffolding standing steel rods, beams or detachable form a simple bridge beams and other military aircraft, the timely completion of the bridge task. 4 on both sides of the provisions of the rules editor I. Longitudinal bridge orbit height requirements correspond to the level remained stable. Before, during and after each lateral leg orbit required level, and strictly control the pitch, three tracks must be parallel. Second, when concrete skew bridge girder installation, bridge machine before, during and after walking round the position of the legs, around the front and rear wheels to be staggered, the distance can be calculated according to the skew angle, so that the legs can be run on the same wheel lateral track (specific issues, please contact the manufacturing units). Third, the bridge machine longitudinal movement to do all the preparatory work is required once in place, it does not allow half-way stop. Fourth, the bridge crane carrying concrete beams longitudinal machine is running, the front leg portion requires hand pull hoist (5t) and fixed sliding track tension and strengthen stability. Fifth, there is the vertical longitudinal install bridge, bridge machine longitudinal displacement taxiing measures have prevented. For example: The iron triangle around the wheel for protection, especially in the legs from the beam end close, pay attention to controlling the shift. Sixth, the bridge machine must be carried out after the assembly hoist crane operation test, the test also used after lifting concrete beams, bridge machine and then run in place to start the installation work. Seven, when the bridge installation work, we should always pay attention to security checks, each installation of a hole must conduct a comprehensive safety inspection, identify problems and timely treatment to stop working in order to continue operations. Mechanical and electrical failures are not allowed to work with. Eight, the installation job allowed overload can not be hanging oblique lifting work. Nine, connecting pin processing material requirements according to design drawings must not be replaced by low steel processing. Ten, five wind over non-job, you must use a solid bridge machine rigging and lifting crane, erecting machine to cut off the power to stop working, to prevent accidents. XI, erecting machine longitudinal position size must be strictly controlled in place to ensure the smooth installation of precast concrete beams in place. Twelve, due to the installation of large bridge bridge machine is special equipment, erecting machine operation must be a clear division of unified command, the operator should set up a full-time, full-time and full-time electrician safety inspectors. Construction organization and have strict measures to ensure construction safety. Of basic conditions are as follows: Commander 1: Familiar bridge structure and lifting work of basic requirements. Firstly familiar with the structure of the bridge machine, assembly procedures, methods of operation and use of the specification requirements, and have some organizational skills, familiar with the command signal, strong sense of responsibility; an electrician: bridging machine can read circuit diagrams and according to FIG. wiring, can quickly troubleshoot problems at work, strong sense of responsibility, business skilled, responsive and responsible persons as erecting machine operation; hydraulic station 1: familiar with the basic knowledge and skills to use and maintenance of the hydraulic system, the correct operation and exclusion of the fault; rigger 3: lifting work with many years of experience, strong sense of responsibility, with certain mechanical knowledge, familiar with the rules and safety regulations crane, serious and responsible, meticulous; Helper 3: a certain cultural knowledge, able-bodied, hard working, willing to delve into the business of youth and culture as an object of use. Thirteen, when the cantilever vertical shift, the upper two-day vehicle must retreat, retreat legs after a car the day before yesterday; legs and rear legs intermediate top high car after the day after tomorrow retreat. Fourth, the top high top high leg the day before the car must retreat at the front legs; acquired vehicle must retreat after a leg. Fifth, the front leg or legs after top high ceiling height, the two-day retreat near the vehicle must be in the legs. Sixteen top front leg high place, you must use special jig locking top high travel segment, in order to avoid prolonged exposure to power jack. XVII hydraulic system, belonging to the two ball-type shut-off valve on the same cylinder, must be closed or opened simultaneously, one must not only open and close another period, otherwise it will cause an accident or even a hydraulic hose burst Cylinder damage; 2, according to the before, during and after the three legs and lifting beam jack of different conditions to determine the relief valve setting value, but the maximum shall not exceed 31MPa. Tuning after locking Nuts, not arbitrarily change the set pressure, too small to work in often overflow, causing the temperature rise can not even work; setting pressure is too large you can not play a role as insurance, damage the elements. Setting specific values ??determined by field technicians; 3, when the oil temperature exceed 70 ℃ when cooling down, when the oil temperature is below 0 ℃ should consider replacing the hydraulic oil temperature; 4, ministries components, such as fault line occurs, immediately stop by trained full-time technician to inspect the repair, the operator can not disassemble; eight, erecting machine must be set up lightning protection devices, be resolved by the use of units. Ninth, carrying capacity crane erecting machine running side beams should meet the relevant requirements must be set free ends stopper. Walking carts box office equipped with special tools (wedge) and warning signs, if due to mechanical, electrical, or misuse caused by runaway carts when walking, walking round the wedge squeezed in between the tracks, so erecting machine can not continue slip. XX vertical shift in the bridge machine or sliding track ends, you must set the stopper to ensure safe shifting bridge machine. XXI before erecting machine work, should be adjusted before, during and after the leg height, longitudinal slope main beam bridge