GB 26469-2011Safety code for launching machine (English PDF)

3.1 General

3.1.1 Metal bridge structure design, selection of materials should be reasonable, structure type and structural measures to meet the structural member in the transportation, installation and During use of strength, stability, rigidity and relevant safety requirements and to minimize the load to accommodate the construction of the bridge construction need. And should facilitate inspection, maintenance and drainage.

3.1.2 metal steel design document, should indicate the grade of steel, if necessary, should be marked on the mechanical properties of steel required by the chemical composition Points and other additional assurance project. Weld form should indicate the required size, grade of weld quality and construction requirements.

3.2 Material Bridge machine bearing structural members, steel selection should meet the requirements GB/T 3811-2008 in 5.3, and does not allow the use of the following Class B Steel.

3.3 pieces of metal structures welding requirements

3.3.1 metal structure fabrication and installation of metal structures units should develop welding procedures in accordance with the relevant standards or JGJ81.

3.3.2 manufacturing units and installation of the first unit of its type of steel used, welding materials, welding, joint type, welding position, weld Combined conditions heat treatment process and the welding parameters, heat or preheat process measures and other parameters should be carried out welding procedure qualification.

3.3.3 welding materials shall meet the following requirements.

a) manual welding electrodes shall comply with GB/T 5117 or GB/T 5118 regulations, gas shielded welding wire should be consistent with GB/T 8110 of Regulations, the grade should be chosen with the main mechanical properties of metals adaptation;

b) submerged arc welding, semi-automatic welding wire and flux shall comply with GB/T 5293 and GB/T 12470, and its grade selection And the mechanical properties of metal body should adapt; The use of carbon dioxide;

c) argon gas welding should comply with the provisions of GB/T 4842, which shall not be less than 99.95% purity Gas shall comply with HG/T 2537's.

3.3.4 metal structure full penetration butt weld fusion welding quality of welded joints according to JB/T 10559 in the weld rating for grading, sub The following three grades.

a) Level 1 refers to an important tension structure of welded joints, such as main beam, small frame tension zones;

b) Level 2 refers to the general tension structure of welded joints;

c) Level 3 refers to compression of the welded joint structure.

3.3.9 Level

1 Weld should have traceability after welding.

3.3.10 welds NDT NDT personnel should obtain the appropriate qualifications; staffing and issuing reports should hold the appropriate testing method The grade II or II level and above qualifications.

3.4 bolts connecting

3.4.1 The design, construction and acceptance of high strength bolt connections shall comply with the provisions of JGJ82.

3.4.2 member assembly joint use of friction-type high connectivity, high-strength bolts connecting member at the contact surfaces should be kept dry, clean, no Should flash, burrs, weld spatter, scars, iron oxide, dirt and the like.

3.4.3 member assembly joints using high strength bolt friction type connection, use a torque wrench to tighten, tighten and should reach the required clamping force Moment, the contact surface should be close fitting. Deputy connection Shi tightening sequences and early twist, re-tighten the torque should meet the design requirements. Torque wrench should be calibrated And a calibration records. High-strength bolts should be tightened construction records.

3.4.4 Non-shear type high strength bolts, nuts, washers, respectively, should be sized according to GB/T 1228, GB/T 1229 and GB/T 1230 regulations Given its technical conditions should be consistent with the provisions of GB/T 1231's. Using twisted deputy shear type high strength bolt connection should comply with GB/T 3632's.

3.4.5 articulation hole bolt hole size should respectively GB/T 27, GB/T 28 and GB/T 152.1 requirements, which should meet the technical conditions Co GB/T 3098.1 requirements.

3.4.6 member assembly joint use of friction-type high strength bolts, high strength bolts can not be reused after disassembly use.

3.5.1 General When erecting machine has a cab, the cab shall comply with GB/T 20303.1 and the relevant provisions of this standard.

3.5.2 When there is danger of falling objects at the top of the cab shall be provided with effective protection.

3.5.3 erecting machine should adopt the enclosed cab. Only for bridge crane driver cabs nature of the work to use less, and may be open-style, Open cab should be located not less than 1m height of the fence.

3.5.4 In the bridge machine space permitting, cab headroom should not be less than 1.8m.

3.5.5 cab work surface illumination of not less than 30lx.

3.7.1 LADDER

3.7.1.1 LADDER tilt angle should not exceed 65 °. In special cases, the angle of inclination should not exceed 75 ° (75 ° Chaoguo press ladders design).

3.7.1.2 oblique sides of the ladder should be set railings, railing on both sides of the pitch. The main inclined ladders should not be less than 0.6m; other LADDER taken as 0.5m. LADDER by side when the body is provided only on the other side of the railing, railing height of not less than 1m.

3.7.1.3 rungs clear width of not less than 0.32m, the height should be taken as a single rung of 0.18m ~ 0.25m, uphill into the ladder rung Depth of not less than the height of the rung, continuous arrangement rung, height and depth should be the same size.

3.7.1.4 Cascade pedal surface should be non-slip.

3.7.2 Ladders

3.7.2.1 ladders on both sides of the strut spacing should not be less than 0.40m, width between both sides of the foot bar stays of not less than 0.30m, rung spacing Should be consistent, appropriate for the 0.23m ~ 0.30m, cascade from the fixed structure should be at least within 0.15m, 0.1m range should Cascade center Distribution can withstand the vertical force of 1200N without permanent deformation.

3.7.2.2 personnel climbing out of the hole size, the hole should not be less than 0.63m × 0.63m, the hole diameter should be taken as 0.63m ~ 0.80m.

3.7.2.3 The height of more than 2m ladders shall be provided with retainer retainer start the installation from 2.0m height onwards, the retainer should be taken as the diameter of 0.6m ~ 0.8m. Between the retainer should be three or five spaced longitudinal slats coupled together and ensure that there is a slat facing vertical ladders Centerline distance between adjacent retainer,. When the retainer is set three longitudinal slats should not exceed 0.9m; when the retainer is set five longitudinal slats When, should not exceed 1.5m. Installation of longitudinal slats retainer within any of a 0.1m should be able to withstand 1000N distribution Vertical force, does not allow permanent deformation.

3.7.2.4 Unless other suitable handle, on both sides of the vertical ladder stays than at least the uppermost rung up 1.0m, when the space is This time limit was up height should not be less than 0.8m.

3.7.2.5 installed in the internal structure of a straight ladder, if the arrangement is to ensure that members of 0.6m diameter sphere can not pass through, you can not set Retainer.

3.7.2.6 ladders terminal should be flush with the platform, the terminal rung pedal or foot bar should not exceed the platform plane.

3.7.2.7 if the ladder is not interrupted at the platform, the retainer should not be interrupted, but should be open at the side of a retaining ring width 0.5m, height of 1.4m Hole for personnel access.

3.8 railings and retaining rope

3.8.1 In the following parts of the bridge railing machines should be installed.

a) used for bridge installation, dismantling, testing, repair and maintenance, and higher than 2m of the bridge work site;

b) leading from the deck height of 2m or more repair and maintenance parts of the channel.

3.8.2 railing settings should meet the following requirements.

a) the upper surface of the railing height of not less than 1m, the lower portion of railing height of not less than 0.1m have skirting board, skirting board and handheld bar There are no less than an intermediate between the rod rail, it skirting board or hand railings must be located no more than 0.5m; clear height of no more than Over 1.3m Channel, hand railings may be the height of 0.8m. Minimum force

b) in any direction at any point on the hand railings should be able to withstand as 1000N, and no permanent deformation.

3.9 Repair and scrap metal structures

3.9.1 The main force member loses overall stability should not be repaired, should be scrapped.

3.9.2 When the main force component corrosion, should be checked and measured. When the main force member section of the original design of the thickness of the corrosion 10%, if not repaired, should be scrapped.

3.9.3 The main force member when cracks should be taken to prevent crack to continue to expand the measures in accordance with the forces and crack the case, and take Measures to strengthen or change the stress distribution, or discontinue use.

3.9.4 The main force component due to plastic deformation, so that institutions can not work properly for safe operation, if not repaired, should be scrapped.

4 main components

4.1.1 boom, boom nut surface should be smooth, no delamination, acute angle, burr, crack. Safety factor of not less than 4.

4.1.2 The hook should be consistent with the provisions of GB/T 10051.1 ~ 10051.12-2010 of.

4.1.3 boom, boom nut manufacturing units due certification, inspection reports and other technical documents can be put into use. Otherwise, shall be subject to Test, qualified before use pinpoint performance. Boom testing should be consistent with GB/T 4162-2008 A level of.

4.1.4 boom, boom threaded nut can not corrode.

4.1.5 boom, boom, one of the following conditions occurs nuts, should be scrapped.

b) significant deformation.

4.1.6 When lifting beam pole one of the following occurs, it should be scrapped.

a) the overall loss of stability over time;

b) corrosion, corrosion section up to 10% of the thickness of the original design, such as when you can not be repaired;

4.2 Rope

4.2.1 bridge wire ropes shall conform to the requirements of GB 8918.

4.2.2 wire rope safety factor, the working level M1 ~ M3 time shall not be less than 4, working-level M4 at not less than 4.5.

4.2.3 Hoisting mechanism should not be used to take a long rope.

4.2.4 load when supported by a plurality of wire rope should be balanced with a force means that each wire rope; equalization device after installation should be flexible rotation Moving between ropes and avoid means balancing the relative sliding occurs. If the rope drive design can not enable the root bearing load from the rope Moving average allocation should be designed to take into account the possibility of the rope between the uneven load distribution.

4.2.5 wire rope on the drum, in order to be able to neatly arranged.

4.2.6 When the spreader is in working position the lowest point on the reel wound wire rope, in addition to a fixed number of turns of the outer end of the rope must be not less than 2 laps.

4.2.7 fixed rope end connections shall meet the following requirements.

a) When connected with a rope clamp, should meet the requirements of Table 1, and should ensure that the connection strength of not less than the breaking strength of 85%; Table 1 safety requirements when connecting rope clip Nominal wire rope diameter/mm <=19 19 ~ 32 32 ~ 38 38 ~ 44 44 ~

60 Rope clip minimum number/set 34567 NOTE. Rope clip seat should rope long head side, spacing wire rope clips should not be less than 6 times the diameter of the wire rope.

b) When connecting braiding, knitting length of not less than 15 times the diameter of the wire rope, and not less than 300mm, the bonding strength can not be Less than 75% of the rope breaking tension;

c) with a wedge, the wedge sleeve when connected, the wedge sleeve steel manufacturing applications, the connection strength of not less than 75% of the breaking strength;

d) with a conical casting sleeve connection, connection strength should reach the rope breaking force;

e) When connected by aluminum sleeve compression method, the connection strength should reach 90% of the rope breaking tension.

4.2.8 Rope maintenance, maintenance, installation, inspection, scrap shall comply with the relevant provisions of GB/T 5972's.

4.3 Reel

4.3.1 reel material should be consistent with GB T 26470-2011 requirements in

4.3.2 welding roll welding shall comply with GB/T 26470-2011 requirements in

5.4.4.5 of. One of the following situations occur when a roll 4.3.3, should be scrapped.

a) affect the performance of surface defects (eg. cracks, etc.);

b) the design of the cylinder wall wear 20% of the wall thickness.

4.4 Pulley

4.4.1 smooth pulley groove should be smooth, without damage to the rope defects.

4.4.2 pulley device or structure shall prevent prolapse rope rope groove. Pulley cover plate and circular roof, etc. pulley body The gap should not exceed 50% of the diameter of the rope, the maximum should not exceed 10mm.

4.4.3 Casting pulley, one of the following conditions occurs, it should be scrapped.

a) affect the performance of surface defects (eg. cracks, etc.);

b) round groove uneven wear of 3mm;

c) wheel wear groove wall thickness of the original wall thickness of 20%;

d) due to wear the wheel diameter of the groove bottom 50% reduction in capacity of the wire rope diameter.

4.5 Brakes

4.5.1 brake should be set in line with the provisions of GB T 26470-2011 in 5.2.13,5.2.14/

4.5.2 erecting machine liftin...