龍門(mén)式起重機(jī)總體結(jié)構(gòu)設(shè)計(jì)及金屬結(jié)構(gòu)設(shè)計(jì)-資料下載頁(yè)
2025-07-04 21:45本頁(yè)面
【正文】 ilds its nose the incline, has exempted the crater to be vertical to clothes rack the bracket arm steel pipe length direction. Must treat in front of welding the original clothes rack bracket arm steel pipe above welds place paints polishes cleanly front, prepares for welds When clothes rack the bracket arm simple root steel pipe surface damage quite is serious, should adopt its damage serious section of steel pipes removes, welds section of steel pipes the method to carry on processing, but must add on a section inside the steel pipe to strengthen the steel pipe. Front in order to cause to weld strengthens the steel pipe to be able the smooth insertion to remove in a section of clothes rack bracket arm steel pipe, strengthens the steel pipe to be supposed to make the similarly long two sections, and uses the thread successively and welds two ways to carry on the connection. Strengthens steel pipe L1 and L239。s length must a section of short 20mm which removes pared to clothes rack the bracket arm steel pipe, also its outer diameter should pared to clothes rack bracket arm steel pipe inside diameter small 20~40 μm, cause to strengthen the steel pipe both to be possible to move in clothes rack the bracket arm steel pipe and no longer bees less crowded. Will strengthen steel pipe L1 and L2 first inserts clothes rack in separately the bracket arm steel pipe, and will use them the screw joint not to be able to get up, then will screw tight causes two shoulders to depend on strictly, will hold looks strengthens the steel pipe after the position, after will occupy separately its screwtop the position, separately and two will weld its screwtop place the jail already to be possible. Clothes rack the bracket arm steel pipe crater must make the incline, when the steel pipe spool thread perpendicular line included angle for 10176。~30176。 between, like the damage is the multiroot steel pipe, should choose 10176。. Here, again earnestly surveys clothes rack the bracket arm steel tube welding good after actual gap size, and refers to the shape which shown in Figure 2, the next section of steel tubing material, the both sides make 30 inclines, cuts open the welding along among in clothes rack in the bracket arm steel pipe gap。 Finishing touch, paints then This time, 4 steel pipes all must weld, therefore should defer to Figure 4 requests the vehicle to make 4 inside diameters to strengthen the tube, after the inside diameter strengthens wall thickness which the tube turning remains to be supposed not to be bigger than clothes rack the bracket arm steel pipe thickness, the middle crater slope must be able to satisfy the strength of a weld the need. At the same time, the entire clothes rack bracket arm 4 steel pipe welding position must stagger, cannot in the identical lateral section, also each steel pipe crater in its spool thread perpendicular line included angle should be 10176。.Welds repairs time must pay attention: Chooses the appropriate welding rod and the material quality reasonable strengthens the steel pipe。 Also must pay attention to the ambient temperature in the fall winter season and weld the explanation labor embryo clamping apparatus and so on to entire to weld repairs the quality the influence, as well as the welding circumference welded joint do not have to be vertical with the original steel pipe length direction.The weak clothes rack bracket arm goes against the sheave pintle the wearing capacity to surpass the full size time 5%, namely should replace. When examination, clothes rack the bracket arm will place in a bearing point, will cause to lift the steel wire to relax, the hand will push the pulley if will rock the quantity to be very big, will have to dismantle with the ruler surveys, otherwise added an oil to be possible.To connects the crown arm festival (lift hook block and tackle), the middle arm festival (expands and contracts cylinder fixedly), the foundation arm festival (with turnplate, amplitude cylinder, keeps off cord pulley axis) and so on place to sell the axis also to have to inspect frequently. When its wearing capacity achieved when full size 5%, must replace promptly. When inspection, also is places clothes rack the bracket arm in a bearing point, dismantles one, inspects one, again installs one, by root inspection, until checkoff.Inspects the lift hook the mark and guards against escapes installs whether conforms to the requirement, flaws and so on lift hook whether there is crack, stripping。 The lift hook cross section wears, the aperture increase, the torsional deflection, whether exceeds the allowed figure。 The lift hook pate and the superficial whether there is weary distortion, the crack and do the correlation sell the axis, the wrap attrition situation. The inspection steel wire specification, the model and the pulley reel matches whether conforms to the design requirement. Steel wire steel wire attachment systems and so on fixed end clamp, line anchor, agreement block whether conforms to the requirement. The steel wire attrition, breaks the silk, the kinking, pressing, the bend, breaks the stock, the corrosion and so on whether exceeds the allowed figure.Brake establishment, brake pattern whether conforms to the design requirement, brake flaws and so on tension bar, spring whether there is weary distortion, crack。 Sells the axis, the spindle, the brake pulley, the brake lining plate whether wears exceeds the allowed figure, hydraulic brake whether oil leak。 Applies the brake the gap adjustment, whether brake power conforms to the requirement. The reel body, does the tube reason whether there is fatigue cracking, damage and so on the situations。 The rope trough and the tube wall wears whether exceeds the allowed figure。 Whether the reel wheel rim highly and does the steel wire twine the layer to match。 Guide rope, wireline guide working condition whether conforms to the requirement。Whether the pulley is equipped with guards against escap
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