CN115464296A - Semi-circular arc crossbeam and assembling method thereof - Google Patents
Semi-circular arc crossbeam and assembling method thereof Download PDFInfo
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- CN115464296A CN115464296A CN202211247092.4A CN202211247092A CN115464296A CN 115464296 A CN115464296 A CN 115464296A CN 202211247092 A CN202211247092 A CN 202211247092A CN 115464296 A CN115464296 A CN 115464296A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 238000003466 welding Methods 0.000 claims description 70
- 230000003014 reinforcing effect Effects 0.000 claims description 29
- 238000005192 partition Methods 0.000 claims description 25
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 239000011324 bead Substances 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000005493 welding type Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C6/00—Girders, or track-supporting structures, specially adapted for cranes
Abstract
The invention provides a semi-circular arc crossbeam and an assembling method thereof. Wherein, semicircle girder includes: an upper wing plate formed in a flat plate shape; the two rail bearing beams are respectively connected to two sides of the upper wing plate; the two square steel rails are respectively connected to the rail bearing beam; and the two ends of the semicircular arc web plates are respectively connected with the square steel rails in a one-to-one correspondence manner. According to the semi-circular-arc girder provided by the embodiment of the invention, the cross section of the girder body is in a semi-circular-arc shape, the upper wing plate is a plane, the square steel rails are arranged on two sides of the upper wing plate, and the web plate is an arc surface, so that the crane is large in size, and meanwhile, the wheel pressure can be reduced by reducing the wind resistance, and further the bearing capacity of a wharf is reduced.
Description
Technical Field
The invention relates to the technical field of crane equipment, in particular to a semi-circular arc girder and an assembling method thereof.
Background
In the use process of the existing crane, the bearing capacity of the inland river wharf is small, and if the inland river wharf is modified to adapt to the arrangement of a large container crane, much capital and time are required to be invested, and the inland river wharf is often difficult to bear. Therefore, it is necessary to improve the container crane equipment, and how to reduce the bearing capacity of the inland wharf while the crane is enlarged is a problem to be solved.
Disclosure of Invention
In view of the above, the present invention provides a semi-circular girder and an assembling method thereof, which can reduce wheel pressure by reducing wind resistance to effectively reduce the bearing capacity of a dock while a crane is enlarged.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to an embodiment of the first aspect of the invention, the semi-circular girder comprises:
an upper wing plate formed in a flat plate shape;
the two rail bearing beams are respectively connected to two sides of the upper wing plate;
the two square steel rails are respectively connected to the rail bearing beam; and
and two ends of the semicircular arc web plate are respectively connected with the square steel rails in a one-to-one correspondence manner.
Further, still include:
the partition plate is formed into a semi-arc shape matched with the web plate, and the partition plate is arranged on the inner side of the semi-arc-shaped web plate.
Further, the baffle plate comprises a plurality of baffle plates which are arranged at intervals along the extending direction of the track on the inner side of the semicircular arc web plate.
Further, still include:
the first reinforcing rib is connected to the back of the upper wing plate;
and the second reinforcing rib is connected between the partition plate and the upper wing plate.
According to the second aspect of the invention, the assembling method of the semi-circular arc girder comprises the following steps:
s1, splicing an upper wing plate and a rail bearing beam;
s2, marking a rail mounting positioning line on the rail bearing beam;
s3, positioning and assembling the square steel track and the rail bearing beam based on the track mounting positioning line;
s4, simultaneously welding the square steel rail and the rail supporting beam in sections;
and S5, turning the upper wing plate, and assembling the semi-arc web plate and the upper wing plate to obtain the semi-arc girder.
Further, the step S1 includes:
s11, sequentially splicing and welding a plurality of sections of the rail-bearing beams in the length direction;
s12, placing the upper wing plate on a horizontal jig frame, and welding the spliced and welded rail bearing beams on two sides of the upper wing plate respectively;
and S13, correcting the integral flatness of the rail bearing beam and the upper wing plate.
Further, the step S2 includes:
s21, marking a central line on the upper wing plate;
s22, marking out the rail mounting positioning line on the rail bearing beams on the two sides of the upper wing plate by taking the central line of the upper wing plate as a reference,
and the opening distance of the positioning line of the track is 6-8m.
Further, the step S3 includes:
s31, arranging fixing components on two sides of the horizontal jig frame;
s32, the square steel rail and the rail supporting beam are clamped and fixed at two sides of the horizontal jig frame through the fixing assembly,
wherein the fixing assembly comprises:
the clamping plate is connected to the side edge of the horizontal jig frame;
and the wedges are connected to the inner side of the clamping plate to fix the square steel rail.
Furthermore, the fixed assemblies comprise a plurality of groups, the groups of fixed assemblies are arranged at intervals along the length direction of the horizontal jig frame, and the interval between every two adjacent groups of fixed assemblies is 470-530 mm.
Further, the step S4 includes:
s41, preheating the square steel rail to 125-135 ℃;
s42, for the preheated square steel rail, welding wires are adopted for one-pass welding in a symmetrical and sectional mode from the middle to two sides;
s43, after welding, wrapping the square steel rail by using a heat insulation material so as to slowly cool the square steel rail.
Furthermore, the semi-circular arc girder comprises a first reinforcing rib and a second reinforcing rib,
in the step S12, spot welding is carried out on the spliced and welded rail bearing beam and the upper wing plate only at the node plate position and the hinge point position of the upper wing plate to position,
after the step S4 is finished and before the step S5, the method further includes:
s6, welding and connecting the gusset plate, the first reinforcing rib and the second reinforcing rib on the upper wing plate, S7, retesting the distance size of the track,
if the deviation meets the preset condition, welding the welding seam of the rail bearing beam and the upper wing plate,
and if the deviation is large, removing the spot welding, and readjusting the rail bearing beam to weld the rail after the distance dimension of the rail meets the preset condition.
Further, the semi-circular arc girder further comprises a partition plate, and the step S5 comprises:
turning over and correcting the upper wing plate;
the upper wing plate is connected with the clapboard;
and welding the semi-arc-shaped web plate on the partition plate and two side edges of the upper wing plate to obtain the semi-arc girder.
The technical scheme of the invention at least has one of the following beneficial effects:
according to the semi-circular-arc girder provided by the embodiment of the invention, the cross section of the girder body is in a semi-circular-arc shape, the upper wing plate is a plane, the square steel rails are arranged on two sides of the upper wing plate, and the web plate is an arc surface, so that the crane is large in size, and meanwhile, the wheel pressure can be reduced by reducing the wind resistance, and further the bearing capacity of a wharf is reduced.
In addition, according to the assembling method of the semi-arc girder provided by the embodiment of the invention, the welding forming precision of the semi-arc girder is high; and the welded square steel rail is adopted, compared with the traditional pressing plate type rail, the material cost is low, the maintenance cost is low, and the product cost can be greatly reduced.
Drawings
FIG. 1 is a schematic structural view of a semi-circular arc girder according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A sectional view taken along line A-A in FIG. 1;
FIG. 3 is a schematic view of a semi-circular arc girder assembly method of the present invention illustrating a track-mounting line;
FIG. 4 is a schematic view of the positioning assembly of the square steel rail and the rail supporting beam according to one embodiment of the invention;
FIG. 5 is a schematic view of the positioning assembly of the square steel rail and the rail supporting beam according to another embodiment of the invention;
FIG. 6 is a schematic view of a welding sequence of rails in a method for assembling a semi-circular arc girder according to an embodiment of the second aspect of the present invention;
fig. 7 is a schematic view of the spot welding position of the rail beam and the upper wing plate in the assembling method of the semi-circular arc girder according to the embodiment of the second aspect of the invention.
Reference numerals: 100. an upper wing plate; 101. an upper wing plate centerline;
200. a rail bearing beam; 201. installing a positioning line on the track;
300. a square steel rail; 400. a web; 500. a partition plate; 600. a first reinforcing rib; 700. a second reinforcing rib; 800. a jig frame for splicing plates; 801. clamping a plate; 802. a wedge block;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships are changed accordingly.
First, a semi-circular arc girder according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, a semi-circular arc girder according to an embodiment of the first aspect of the present invention includes: the upper wing plate 100, two rail supporting beams 200, two square steel rails 300 and a semi-circular arc web 400.
The upper panel 100 is formed in a flat plate shape.
Two rail supporting beams 200 are respectively connected to both sides of the upper wing plate 100.
Two square steel rails 300 are respectively connected to the rail supporting beam 200.
The two ends of the semicircular arc web 400 are respectively connected with the square steel rails 300 in a one-to-one correspondence manner.
Specifically, the semi-circular-arc girder according to the embodiment of the present invention mainly comprises a flat-plate-shaped upper wing plate 100 and a semi-circular-arc web 400, wherein two sides of the upper wing plate 100 are respectively connected with a rail bearing beam 200, a square steel rail 300 is installed on the rail bearing beam 200, and two side ends of the semi-circular-arc web 400 are respectively connected to the lower portion of the rail bearing beam 200 corresponding to the square steel rail 300, so that the designed semi-circular-arc girder can reduce wind resistance to reduce wheel pressure and effectively reduce the bearing capacity of the wharf while the structure of the semi-circular-arc girder is enlarged, and the semi-circular-arc web 400 is simple in structure, stable and reliable.
In some embodiments, the semi-circular arc girder may further include: the separator 500.
The partition 500 is formed in a semi-circular arc shape to be fitted to the web 400, and the partition 500 is disposed at the inner side of the semi-circular arc shaped web 400.
Specifically, the inner side of the web 400 is provided with the partition plate 500 matched with the semicircular arc-shaped cavity, the left side, the right side and the lower side of the partition plate 500 are connected with the inner wall of the web 400, and the top of the partition plate 500 is connected with the bottom of the upper wing plate 100, so that the structural connection reliability of the web 400 is enhanced, and the stability of the whole structure of the girder is further improved.
Further, the partition plate 500 comprises a plurality of partition plates 500 arranged at intervals along the track extending direction inside the semicircular arc web 400.
That is, the plurality of spacers 500 are sequentially disposed at intervals inside the semicircular arc web 400, thereby enhancing the structural stability of each segment of the web 400.
In some embodiments, the semi-arc girder may further include: a first reinforcing bead 600 and a second reinforcing bead 700.
Wherein the first reinforcing bead 600 is coupled to the rear surface of the upper wing plate 100.
The second reinforcing bead 700 is coupled between the spacer 500 and the upper wing plate 100.
Specifically, for example, a plurality of first beads 600 in the width direction may be provided at intervals on the back surface of the upper wing plate 100, thereby enhancing the strength of the entire structure of the upper wing plate 100; two second reinforcing ribs 700 may be respectively disposed on two sides of the central line of the partition board 500, and a pair of the second reinforcing ribs 700 is disposed opposite to each other, so that the distance between the upper ends is large and the distance between the lower ends is small, thereby further enhancing the connection strength between the partition board 500 and the upper wing plate 100.
It should be noted that, the installation of the square steel rail should ensure the adhesion with the rail bearing beam, and also ensure the rail size of the trolley (such as rail opening, straightness, horizontal and longitudinal levels, and horizontal height difference of the same cross section), and if the rail is welded after the box body is formed, the flatness of the box body cannot meet the adhesion between the rail and the rail bearing beam surface, so that the rail weld seam bears the fatigue load for a long time, the rail fillet weld seam is cracked, and the negative influence is generated on the quality. In order to ensure the relevant size of the trolley track and accurately control the running trolley, according to the assembling method of the semi-arc girder provided by the embodiment of the invention, the installation process, the welding sequence, the track welding assembly method and the like of the welding type track are optimized, and the joint between the track and the rail bearing beam surface and the requirement of various sizes of the trolley track are better ensured.
According to the second aspect of the invention, the assembling method of the semi-circular arc girder comprises the following steps:
s1, splicing an upper wing plate 100 and a rail bearing beam 300;
s2, marking a track installation positioning line on the track bearing beam 300;
s3, positioning and assembling the square steel rail 300 and the rail bearing beam 300 based on the rail mounting positioning line;
s4, simultaneously welding the square steel rail 300 and the rail bearing beam 300 in sections;
and S5, turning the upper wing plate 100, and assembling the semi-arc web 400 and the upper wing plate 100 to obtain the semi-arc girder.
Specifically, according to the assembling method of the semi-circular arc girder of the embodiment of the present invention, first, the two sides of the upper wing plate 100 are connected to the rail bearing beams 300 by the jointed plates respectively; secondly, a track mounting positioning line is scribed on the rail bearing beam 300 in advance and used for positioning and mounting the square steel track 300; then, connecting and arranging the square steel rail 300 on the surface of the rail bearing beam 300 according to the marked rail mounting positioning line; finally, the square steel rail 300 and the rail bearing beam 300 are simultaneously welded in sections, and after welding, the upper wing plate 100 is turned over and assembled with the semi-arc web 400 to form a final semi-arc girder.
According to the assembling method of the semi-circular arc girder provided by the embodiment of the invention, the rail connection mode is optimized, and the whole structure of the girder is formed simply and reliably.
Hereinafter, an assembling method of the semi-arc girder according to the embodiment of the second aspect of the present invention will be described in detail step by step.
According to some embodiments of the invention, step S1 may comprise:
s11, sequentially splicing and welding the multiple sections of the rail-bearing beams 200 in the length direction;
s12, placing the upper wing plate 100 on a horizontal jig frame, and welding the spliced and welded rail-bearing beams 200 on two sides of the upper wing plate 100 respectively;
and S13, correcting the integral flatness of the rail bearing beam 200 and the upper wing plate 100.
Specifically, the upper wing plate 100 and the rail supporting beam 300 are jointed, wherein firstly the rail supporting beam 300 is formed by splicing a plurality of sections of shorter rail supporting beams, and the welded square rail has lower material cost and less maintenance cost than the traditional pressing plate type rail, so that the product cost can be greatly reduced.
Then, the upper wing plate 100 is placed on a horizontal jig frame, and the rail bearing beams 200 after welding and splicing are welded on two sides of the upper wing plate 100, so that the integral flatness of the connected rail bearing beams 200 and the upper wing plate 100 is specifically corrected through the horizontal jig frame, and the flatness error of the rail bearing beam 200 area is not more than 1mm/2m. In other words, when the upper wing plate 100 and the rail bearing beam 300 are jointed, the overall flatness is adjusted by placing the upper wing plate on the horizontal jig, and the welding precision of the semi-circular arc girder can be effectively ensured.
According to some embodiments of the invention, step S2 may comprise:
s21, drawing a center line on the upper wing plate 100;
s22, with the central line of the upper wing plate 100 as the reference, marking the track mounting positioning line 201 on the rail supporting beams 200 at the two sides,
wherein, the spacing of opening the gear of the positioning line of the track is 6-8m.
Specifically, as shown in fig. 3, the rail mounting positioning line 201 is scribed on the rail support beam 300, firstly, the upper wing plate center line 101 is scribed on the upper wing plate 100, and then, symmetrical rail mounting positioning lines 201 are scribed on the rail support beams 200 on both sides of the upper wing plate center line 101, wherein the space between the rail mounting positioning lines 201 is 6-8m, and the space is used as the shrinkage allowance for welding the subsequent square rail, so as to determine the final rail mounting positioning line 201, thereby effectively ensuring the accuracy of rail mounting.
According to some embodiments of the invention, step S3 may comprise:
s31, arranging fixing components on two sides of the horizontal jig frame 800;
s32, clamping and fixing the square steel rail 300 and the rail bearing beam 200 on two sides of the horizontal jig frame 800 through the fixing assembly,
wherein, fixed subassembly includes: a clamping plate 801 and a plurality of wedges 802.
Wherein the clamping plate 801 is connected to the side of the horizontal jig frame 800.
A wedge 802 is attached inside the catch plate 801 to secure the square steel rail 300.
Specifically, for example, in one embodiment, as shown in fig. 4, fixing units are provided on both sides of the horizontal jig 800, the clamp plate 801 of each fixing unit is formed into an inverted J shape and is fixedly welded to one side of the horizontal jig 800, three wedges 802 are connected to the top inner grooves of the inverted J-shaped clamp plate 801, the rail beam 200 is inserted from the bottom notch of the inverted J-shaped clamp plate 801 when the fixing is performed, and the square rail 300 is engaged with the top inner grooves of the clamp plate 801 by the three wedges 802, thereby engaging and fixing the horizontal jig 800 to the square rail 300 and the rail beam 200. In another embodiment, as shown in fig. 5, fixing components are respectively arranged on two sides of the horizontal jig 800, a clamping plate 801 in the fixing components is C-shaped, a wedge block 802 is arranged on the bottom of an inner groove of the C-shaped clamping plate 801, the rail bearing beam 200 extends from a notch of the C-shaped clamping plate 801, and the rail bearing beam 200 and the square steel rail 300 are clamped together by the wedge block 802 at the bottom of the inner groove of the C-shaped clamping plate 801 and the top wall of the inner groove.
In conclusion, the bottom surface of the rail is tightly attached to the rail bearing beam due to the assembly form of the rail, and the damage to a product base material due to the traditional clamp code welding structure is avoided due to the improvement of the clamping plate.
Further, the fixing assemblies may include a plurality of sets of fixing assemblies spaced apart along the length direction of the horizontal jig frame 800, and the spacing between two adjacent sets of fixing assemblies is 470-530 mm.
That is to say, set up the fixed subassembly of multiunit in the length direction along horizontal bed-jig 800 interval to the square steel track 300 carries out positioning assembly with bearing rail roof beam 300, and simple structure, easy to carry out has effectively guaranteed the accuracy of girder in the welding formation process.
According to some embodiments of the invention, step S4 may comprise:
s41, preheating the square steel rail 300 to 125-135 ℃;
s42, for the preheated square steel rail 300, welding wires are adopted for one-time welding in a symmetrical and sectional mode from the middle to two sides;
and S43, after welding, wrapping the square steel rail 300 by using a heat-insulating material so as to slowly cool the square steel rail.
Specifically, firstly, the square steel rail 300 is preheated in advance during welding, so that the purpose of reducing the cooling speed can be achieved, and the generation quality of a product is prevented from being influenced by cracks generated in a welding seam; next, as shown in fig. 6, after preheating, the counter steel rail 300 and the rail receiving beam 200 are welded together in a single welding step, symmetrically sectioned from the middle to both sides, thereby reducing heat input for rail welding and controlling adverse effects of welding on the flatness of the upper panel.
According to some embodiments of the invention, wherein the semi-circular arc girder comprises a first reinforcing rib 600 and a second reinforcing rib 700, for this purpose:
in step S12, spot welding is performed only at the gusset position and the hinge point position of the upper wing plate 100 on the spliced and welded rail support beam 200 and the upper wing plate 100 to position them.
After the step S4 is finished and before the step S5, the method for assembling the semi-circular arc girder further includes:
s6, welding and connecting the gusset plate and the first reinforcing rib 600 and the second reinforcing rib 700 on the upper wing plate 100, S7, retesting the distance size of the track,
if the deviation satisfies a predetermined condition, welding the welding seam of the rail supporting beam 200 and the upper wing plate 100,
if the deviation is large, the spot welding is removed, and the rail bearing beam 200 is readjusted to weld after the rail distance dimension meets the preset condition.
Specifically, as shown in fig. 7, the areas B and C are the gusset position and the hinge point position of the upper wing plate 100, respectively, and are used for reserving adjustment margin after welding. That is to say, after the square steel rail 300 and the rail supporting beam 300 are welded in sections, before the assembly of the semicircular arc web 400 and the upper wing plate 100 is completed, the gusset plate, the first reinforcing rib 600 and the second reinforcing rib 700 are welded and connected to the upper wing plate 100, then the rail distance size is retested, if a large deviation exists, the tack welding is removed, the rail distance size is readjusted and then the tack welding is performed in place, so that the rail distance size is secondarily adjusted, and the accuracy of the rail size welding is further ensured.
According to some embodiments of the present invention, wherein the semi-arc girder further includes a partition plate 500, the step S5 may further include:
turning over and correcting the upper wing plate 100;
a partition 500 is connected to the upper wing plate 100;
the semicircular arc girder is obtained by welding the partition plate 500 and both side edges of the upper wing plate 100 with the semicircular arc web 400.
That is, before the semi-arc web 400 and the upper wing plate 100 are finally assembled, the upper wing plate 100 needs to be turned over and corrected to ensure the flatness of the upper wing plate 100 during connection, a plurality of partition plates 500 arranged at intervals are installed on the back surface of the upper wing plate 100, and after the partition plates 500 are installed, the semi-arc web 400 welds the partition plates 500 and two side edges of the upper wing plate 100 to form a final semi-arc girder, so that the structural strength of the girder is effectively enhanced.
The following is a flow of specific implementation steps according to an embodiment of the present invention:
(1) And building a horizontal jig frame in a workshop, detecting to be qualified, splicing the upper wing plate after blanking on the horizontal jig frame, namely splicing the middle section of the upper wing plate and the splicing plate of the bearing rail beam, correcting the flatness to be qualified, marking out an assembly line of the reinforcing ribs and the partition plate, assembling and welding the reinforcing ribs, and correcting the flatness again to be qualified after welding.
(2) And turning over the upper wing plate, flatly paving the upper wing plate on a jig frame, marking the central line of the upper wing plate after ensuring that the binding surface is flat, making an obvious mark, marking the central line of track installation and a positioning line by taking the central line as a reference, and enlarging the positioning opening of the track by 6-8mm. And positioning and assembling the track according to the marking, and ensuring that the bottom surface of the square steel rail is tightly attached to the rail bearing beam by utilizing the matching of clamping plates and inclined wedges on the two sides of the jig frame and the interval of each clamping plate is 500 mm.
(3) In order to reduce welding heat input and control welding deformation of the upper wing plate unit, the welding type rail is symmetrically welded in sections from the middle to two sides at the same time, preheating is carried out before welding, the preheating temperature is 130 ℃, a phi 16 welding wire is adopted for one-time welding forming during welding, the welding is symmetrically welded in sections from the middle to two ends of the rail at the same time, and after welding, expanded cloth is used for wrapping, heat preservation and slow cooling.
(4) And temporarily not welding the positions of the upper wing plate joint plates and the hinge points, namely welding seams at the corresponding positions of the rail bearing beam panel and the upper wing plate when the girder box body is formed, re-measuring the gauge size after the joint plates and the reinforcing rib plates are installed, removing the tack welds if large deviation exists, and welding in place after the gauge size is re-adjusted.
(5) And turning over and correcting the upper wing plate, positioning the partition plate, hanging the web plates at two sides, and finally assembling the middle subsection component of the web plate to finish the manufacture of the girder.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A semi-circular arc girder, comprising:
an upper wing plate formed in a flat plate shape;
the two rail bearing beams are respectively connected to two sides of the upper wing plate;
the two square steel rails are respectively connected to the rail bearing beam; and
and two ends of the semicircular arc web plate are respectively connected with the square steel rails in a one-to-one correspondence manner.
2. A semi-circular arc girder according to claim 1, further comprising:
the baffle, the baffle forms into with the half-circular arc of web looks adaptation, the baffle sets up the inboard of half-circular arc web.
3. A semi-circular arc girder according to claim 2 wherein said bulkheads comprise a plurality of said bulkheads spaced inwardly of said semi-circular arc webs in the direction of extension of said rail.
4. A semi-circular arc girder according to claim 2, further comprising:
the first reinforcing rib is connected to the back of the upper wing plate;
and the second reinforcing rib is connected between the partition plate and the upper wing plate.
5. A method of assembling a semi-circular arc girder according to any one of claims 1 to 4, comprising the steps of:
s1, splicing an upper wing plate and a rail bearing beam;
s2, marking a track installation positioning line on the track bearing beam;
s3, positioning and assembling the square steel rail and the rail bearing beam based on the rail mounting positioning line;
s4, simultaneously welding the square steel rail and the rail supporting beam in sections;
and S5, turning the upper wing plate, and assembling the semi-arc web plate and the upper wing plate to obtain the semi-arc girder.
6. The method according to claim 5, wherein the step S1 comprises:
s11, sequentially splicing and welding a plurality of sections of the rail-bearing beams in the length direction;
s12, placing the upper wing plate on a horizontal jig frame, and welding the spliced and welded rail bearing beams on two sides of the upper wing plate respectively;
and S13, correcting the integral flatness of the rail bearing beam and the upper wing plate.
7. The method according to claim 6, wherein the step S2 comprises:
s21, marking a central line on the upper wing plate;
s22, marking out the track mounting positioning line on the track bearing beams on the two sides of the upper wing plate by taking the central line of the upper wing plate as a reference,
and the opening space of the positioning line of the track is 6-8m.
8. The method according to claim 6, wherein the step S3 comprises:
s31, arranging fixing components on two sides of the horizontal jig frame;
s32, the square steel rail and the rail bearing beam are clamped and fixed at two sides of the horizontal jig frame through the fixing assembly,
wherein, fixed subassembly includes:
the clamping plate is connected to the side edge of the horizontal jig frame;
and the wedges are connected to the inner side of the clamping plate to fix the square steel rail.
9. The method of claim 8, wherein the fixture assemblies comprise a plurality of sets of the fixture assemblies spaced apart along a length of the horizontal jig frame, and a spacing between adjacent sets of the fixture assemblies is 470-530 mm.
10. The method according to claim 6, wherein the step S4 comprises:
s41, preheating the square steel rail to 125-135 ℃;
s42, for the preheated square steel rail, welding wires are adopted for one-pass welding in a symmetrical and sectional mode from the middle to two sides;
s43, after welding, wrapping the square steel rail by using a heat insulation material so as to slowly cool the square steel rail.
11. The method of claim 10, wherein the semi-circular arc longerons include a first reinforcing rib and a second reinforcing rib,
in the step S12, spot welding is performed on the spliced and welded rail support beam and the upper wing plate only at the gusset plate position and the hinge point position of the upper wing plate to position,
after the step S4 is finished and before the step S5, the method further includes:
s6, welding and connecting the gusset plate, the first reinforcing rib and the second reinforcing rib on the upper wing plate,
s7, retesting the distance size of the track,
if the deviation meets the preset condition, welding the welding seam of the rail bearing beam and the upper wing plate,
and if the deviation is large, removing the spot welding, readjusting the rail bearing beam to enable the rail distance size to meet the preset condition, and then welding.
12. The method of claim 11, wherein the semi-circular arc longerons further comprise a bulkhead, and wherein step S5 comprises:
turning over and correcting the upper wing plate;
the upper wing plate is connected with the clapboard;
and welding the semi-arc-shaped web plate on the partition plate and two side edges of the upper wing plate to obtain the semi-arc girder.
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| CN202211247092.4A CN115464296A (en) | 2022-10-12 | 2022-10-12 | Semi-circular arc crossbeam and assembling method thereof |
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