CN101927955B - Manufacturing process of girder of overhead or gantry crane - Google Patents

Manufacturing process of girder of overhead or gantry crane Download PDF

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CN101927955B
CN101927955B CN 201010227906 CN201010227906A CN101927955B CN 101927955 B CN101927955 B CN 101927955B CN 201010227906 CN201010227906 CN 201010227906 CN 201010227906 A CN201010227906 A CN 201010227906A CN 101927955 B CN101927955 B CN 101927955B
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girder
rope
crane
shaped
welded
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CN101927955A (en
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傅萍
傅昆
傅国华
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傅萍
傅昆
傅国华
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Abstract

The invention discloses a manufacturing process of a girder of an overhead or gantry crane, a threaded pull rod 7 in a box body 1 of a tensioning device is connected with a connecting seat 6, and the manufacturing process is characterized in that two wedge-shaped grooves are formed on the connecting seat 6, two rope head casting ports 5 with wedge-shaped outer shapes and square cone-shaped inner cavities are mounted in the grooves, two wedge-shaped grooves are formed on a fixed hinge 19 at the other end of a steel wire rope 3, and the rope head casting ports 25 with the wedge-shaped outer shapes and the square cone-shaped inner cavities are mounted in the grooves. The manufacturing process adopts the two groups for tensioning, the two groups are mounted on the same girder, and the ultimate tensioning force is great, thereby being applicable to manufacturing the girders of the cranes with the hoisting capacity of below 400 tons. The manufacturing process has the advantages of easy manufacturing, low cost and convenient construction, and is particularly applicable to manufacturing the gantry cranes with the span of above 60m in ports and the shipbuilding industry. The arch difference of the girder of the crane manufactured by adopting the invention can be controlled within 0-1mm, which is better than the international standard; furthermore, the manufacturing process can increase the cutting area of the girder structure, improve the strength, the static stiffness and the hoisting capacity of the girder, save steel, reduce the cost by 15-20%, be in line with the policies of energy conservation and emission reduction and prolong the service life of equipment.

Description

The method of bridge-type, main beam of gantry crane manufacturing or transformation
Technical field
The present invention relates to hoisting crane manufacturing or remodeling method, relate in particular to the method (hereinafter to be referred as crane girder manufacturing or transformation) of a kind of bridge-type, main beam of gantry crane manufacturing or transformation.
Background technology
Bridge-type, transfer crane are the special equipments that industry and traffic goods and materials enterprise widely uses, for guaranteeing the hoisting crane performance demands, avoid motor-driven carrier " climbing ", " slide car " phenomenon to take place, crane girder must have certain camber, China's hoisting crane manufacturing technology standard code crane girder when zero load, the due camber of girder span centre (L KSpan for hoisting crane).Stipulated amount of deflection under the girder elasticity simultaneously (counting from original camber) is because the various reasons in designing, make, using all can make crane girder produce lower flexure strain, its harm shows as: cart is gnawed rail, dolly " climbing ", " slide car ", hoisting capacity descends, even has an accident, and jeopardizes safety.
Summary of the invention
The objective of the invention is to: for solving the deficiency of above-mentioned conventional art, the applicant is formerly on the basis of patent (patent No. is respectively: ZL200710035163.3, ZL200520098253.3, ZL200320113833.6), the principle of Material Used mechanics, apply the longitudinal pressure that departs from the beam axis at the two ends of girder, cause a moment of flexure that beam is upwards arched upward, make girder remain arch.
The method of a kind of bridge-type, main beam of gantry crane manufacturing or transformation, undertaken by following operation successively: prepare, weld, join rope cloth rope, tension process, its welding sequence is: help plate to be welded into whole by rebound and some reinforcings tensioner casing and the tensioner outer case of setting up, and be welded in an end of girder lower cover, help plate to be welded into whole by rebound and some reinforcings fixed-hinged support and the fixed-hinged support outer case of setting up again, and be welded in the other end of girder lower cover; Thread in the tensioner casing is connected with Connection Block, drive 2 webge slots on the Connection Block, it is that wedge shape, inner chamber are the bevelled pouring basin of rope end in side that 2 profiles are housed in the groove, the other end of steel rope is fixed on the fixing hinge of fag end, fixedly hinge has 2 webge slots, and it is that wedge shape, inner chamber are the bevelled pouring basin of rope end in side that two profiles are housed in the groove; Adopt the tensioning system of every group of 200 tons of stretching forces to carry out the stretch-draw of two group; A group and B group pulling force are antiparallel each other, install side by side.
Of the present inventionly join that fag end handle to adopt tin-base babbit that the fag end casting is fixed in the bevelled inner chamber of pouring basin of rope end 5 sides in the rope operation, steel rope adopts zinc-plated strand.
The rebound of tensioner outer case of the present invention and fixed-hinged support outer case and the welding of girder lower cover is wider than the girder lower cover.
To sling according to crane girder Manufacturing drawing and the completed crane girder of technology in the preparatory process of the present invention, make the height location of its lower cover by distance ground 1.4-1.6 rice, be unkitted away the plane (such as being four) of wheel support in the bottom of end carriage, supported girder and end carriage with bearing support or cushion block, made its stable falling.
The easy processing and manufacturing of the present invention, low, the easy construction of cost, be applicable to that hoisting capacity is the manufacturing of the crane girder below 400 tons, the transfer crane manufacturing that is particularly useful for harbour, shipbuilding industry transforms that (this type of hoisting crane span is used the present technique manufacturing and transformed then more apparent preceence generally greater than 60m.) to make the hoisting crane characteristics of transformation as follows in the present invention: 1, hoisting crane two camber differences remain in the 0-1 millimeter scope; 2, crane girder remains at arbitrary value in state's standard range; 3, it is long-pending that Fa Ming tensioner system has increased the tangent plane of main beam structure, improved the intensity and the quiet rigidity of girder, and improved hoisting capacity; 4, save steel, cost-cutting 15%-20% meets national energy-saving and emission-reduction policy, prolongs service life of equipment.
The present invention adopts the manufacturing of tensioner system to transform girder, take the mode that every girder installs two group tensioning systems additional to make transformation for hoisting capacity 201T--400T hoisting crane, adopt the mode that every girder installs single group tensioning system additional to make transformation for the following hoisting crane of hoisting capacity 200T.Below be the example explanation to install two groups additional, single group is installed the mode that the A group only is installed that is.
Install for two groups and be meant that installing oppositely directed each other pair of stretching force additional at every girder lower cover of hoisting crane organizes (A group, B group) tensioning system.Every group of stretching force is 200TF, and then the single-beam stretching force is 400TF, and the twin beams stretching force is 800TF.
The present invention can be used for crane girder manufacturing below 400 tons and transforms, and is particularly useful for the transfer crane of harbour, shipbuilding industry.Because this type of hoisting crane span is generally greater than 60m, the lifting tonnage is big, span big, use is frequent, and its girder span centre is prone to downwarp, and dolly is gnawed rail, climbing, and the car influence of slipping is kept the safety in production.
Description of drawings
Fig. 1 girder-tensioning system constructional drawing
A is to view among Fig. 2 Fig. 1, (tensioning system-stretching force 200TF)
Fig. 3 stretching force is a 400TF safety hanging clamp scheme drawing
The specific embodiment
Below in conjunction with accompanying drawing the invention process is elaborated.
The first step: preparatory process:
To sling according to crane girder Manufacturing drawing and the completed crane girder of technology, make the height location of its lower cover by distance ground 1.4-1.6 rice, in the bottom of end carriage, those four planes of being unkitted away wheel support, supported girder and end carriage with bearing support or cushion block, make its stable falling.
Second step: welding sequence:
Tensioner casing 1 is positioned in the cuboid tensioner outer case 28 of setting up, pass through rebound, the plurality of strengthening ribs plate is set as required, be welded into whole, with this a whole end that is welded in girder 23 lower covers, again fag end is connected hinged-support 20 and be positioned in the cuboid outer case 29 of setting up then, be welded into whole, and be welded in the other end of girder 23 lower covers, the plurality of strengthening ribs plate is set as required.
The 3rd step: join rope cloth rope operation:
The A that at first constructs group, the stretch-draw length according to girder 23 lower covers calculates the steel rope cutting length, carries out fag end again and handles; Thread 7 in the tensioner casing 1 is connected with Connection Block 6, on Connection Block 6, drive 2 webge slots, it is that wedge shape, inner chamber are the bevelled pouring basin of rope end 5 in side that 2 profiles are housed in the groove, steel rope 3 is installed, the alignment of 9 strand steel wire ropes is used thin wire colligation jail near the fag end place, and penetrate in the pouring basin of rope end 5, then fag end is broken, it is hook-shaped to curve 60 degree, and adopt tin-base babbit that the fag end casting is fixing, again pouring basin of rope end 5 is embedded in the webge slot on the Connection Block 6, fixing with pressing plate 4 and bolt 2.The other end of steel rope 3 is fixed on the fixing hinge 19 of fag end, fixing hinge 19 has 2 webge slots, it is that wedge shape, inner chamber are opened identical with tensioner for bevelled pouring basin of rope end 25 its fag end processing methods in side that two profiles are housed in the groove, steel rope 3 usefulness pressing plates 24 and bolt 22 are fixing, to fix the hinge 19 fag end fixed-hinged supports of packing into, connect again spring cotter 18 is fixing by bearing pin 17.The A group is successively finished with the B group.The operating sequence of the operating sequence of B group and A group is just the same, and B group stretch-draw direction is opposite with the A group, and purpose is that A group, B organize mutually noninterfere when tension operation.
The 4th step: tension process:
1, A group and B group, every steel rope is all stretching in advance, and inconvenient in the contact of girder two ends because of the big workmen of span, with mobile phone or citophone contact commander, the synchronous swivel nut in two ends carries out stretch-draw.
2, A group and B group (the same number of turns) rotation synchronously position device nut 11 makes thread 7 drive Connection Block 6 longitudinal travels, thereby stretching wire rope 3 makes two cambers reach consistent.The execution national standard Upper limit of variation Remaining girder arches up synchronously.
3, after the stretch-draw locking cage plate 13 is welded with dust boot 16.Be enclosed within and also use bolt 14, nut 15, affixed on the nut 11, locking cage plate 13 welding dust boots 16 with bearing location cover for seat 12.
4, be connected tensioner outer case 28, fixed-hinged support outer case 29 with spring cotter in lower cover by steel pipe, pivot pin again.Safety hanging clamp 30 is installed in outer case 28 and 1 meter position of 29 distances.

Claims (2)

1. the method for a bridge-type, main beam of gantry crane manufacturing or transformation, it is characterized in that: undertaken by following operation successively: prepare, weld, join rope cloth rope, tension process, its welding sequence is: help plate to be welded into whole by rebound and some reinforcings tensioner casing (1) and the tensioner outer case (28) of setting up, and be welded in an end of girder (23) lower cover, help plate to be welded into whole by rebound and some reinforcings fixed-hinged support (20) and the fixed-hinged support outer case (29) of setting up again, and be welded in the other end of girder (23) lower cover; Thread (7) in the tensioner casing (1) is connected with Connection Block (6), drive 2 webge slots on the Connection Block (6), it is that wedge shape, inner chamber are side's bevelled pouring basin of rope end (5) that 2 profiles are housed in the groove, the other end of steel rope (3) is fixed on the fixing hinge of fag end (19), fixing hinge (19) has 2 webge slots, and it is that wedge shape, inner chamber are side's bevelled pouring basin of rope end (25) that two profiles are housed in the groove; Adopt the tensioning system of every group of 200 tons of stretching forces to carry out the stretch-draw of two group; A group and B group pulling force are antiparallel each other, install side by side.
2. the method for bridge-type according to claim 1, main beam of gantry crane manufacturing or transformation, it is characterized in that: will sling according to crane girder Manufacturing drawing and the completed crane girder of technology in the preparatory process, make the height location of its lower cover by distance ground 1.4-1.6 rice, be unkitted away the plane of wheel support in the bottom of end carriage, supported girder and end carriage with bearing support or cushion block, made its stable falling.
CN 201010227906 2010-07-15 2010-07-15 Manufacturing process of girder of overhead or gantry crane Active CN101927955B (en)

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Application Number Priority Date Filing Date Title
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CN101927955B true CN101927955B (en) 2013-07-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489939B (en) * 2011-11-24 2013-07-10 吕传水 Production process of main beam of crane
CN102515021A (en) * 2011-12-06 2012-06-27 王松江 Main girder of single-girder crane
CN103482473B (en) * 2013-10-18 2015-11-11 中南林业科技大学 A kind of distribution of force situation method and structure improving bridging crane main beam
CN110217697A (en) * 2019-06-24 2019-09-10 傅萍 The method of crane girder manufacture transformation

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* Cited by examiner, † Cited by third party
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CN1024914C (en) * 1992-07-02 1994-06-08 付敏华 Method for repairing crane main beam by use of " Prestress tensiones"
DE19820098C2 (en) * 1998-05-06 2003-04-03 Man Takraf Foerdertechnik Gmbh Carrier for a crane
CN2853737Y (en) * 2005-09-29 2007-01-03 傅萍 Prestressed stretch-draw apparatus
CN100494038C (en) * 2006-12-17 2009-06-03 王冠华 Girder downwarping repairing method for beam crane and beam type crane

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