CN114319104A - Irregular box-shaped bridge tower node and manufacturing method thereof - Google Patents

Abstract

The invention discloses an irregular box-shaped bridge tower node, which comprises: go up the wainscot and relative setting from top to bottom with lower wainscot, the both sides of going up wainscot and lower wainscot are located to the side wall board, and the both sides of going up the wainscot are passed through inclined wall board and are connected with the upper end of side wall board, and the both sides of lower wainscot are passed through inclined wall board and are connected with the lower extreme of side wall board, and first edge web, well web and second edge web are located perpendicularly between wainscot and the lower wainscot, and the port department between last wainscot, lower wainscot, first edge web and the side wall board is located to first node board, the port department between last wainscot, lower wainscot, first node board and the second node board, and the port department between last wainscot, lower wainscot, second edge web and the second node board is located to the third node board. According to the invention, the structure of the bridge tower node is optimized, so that the structural strength and the supporting performance of the bridge tower node are improved, the connection stability of each component is effectively improved, and the deformation resistance of each component is improved.

Description

Irregular box-shaped bridge tower node and manufacturing method thereof

Technical Field

The invention belongs to the technical field of steel structure buildings, and particularly relates to an irregular box-shaped bridge tower node and a manufacturing method thereof.

Background

The steel structure building is a novel building system, breaks through the industrial boundary lines among the house area industry, the building industry and the metallurgy industry, and is integrated into a new industrial system, namely the steel structure building system which is generally seen by the industry people. Compared with the traditional concrete building, the steel plate or the section steel replaces reinforced concrete, so that the steel structure building has higher strength and better shock resistance. And because the components can be manufactured in factories and installed on site, the construction period is greatly reduced. Because the steel can be repeatedly used, the construction waste can be greatly reduced, and the steel is more environment-friendly, so the steel is widely adopted by all countries in the world and is applied to industrial buildings and civil buildings.

The processing and manufacturing requirements of the bridge tower are high, the welding deformation control difficulty of the box body is high, the welding requirements from design to blanking, assembling and later period are high, and the requirements of the existing bridge tower cannot be met by welding.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide a manufacturing method of an irregular box-shaped bridge tower node, which greatly improves the structural strength and the supporting performance of the bridge tower node by optimizing the structure of the bridge tower node, and can effectively improve the connection stability of each component and improve the deformation resistance of each component by mutually matching each component.

The technical scheme is as follows: in order to achieve the above object, the present invention provides an irregular box bridge tower node, comprising: go up exterior wall board, a set of side wall board, first edge web, well web, second edge web, a set of first gusset plate, a set of second gusset plate and a set of third gusset plate down, go up exterior wall board and relative setting from top to bottom of exterior wall board down, the both sides of exterior wall board and exterior wall board down are located to the side wall board, just the both sides of going up the exterior wall board are connected with the upper end of side wall board through inclined wall board, the both sides of exterior wall board are connected with the lower extreme of side wall board through inclined wall board down, first edge web, well web and second edge web are located perpendicularly between exterior wall board and the exterior wall board down, port department between last exterior wall board, lower exterior wall board, first edge web and the side wall board is located to first gusset plate, the port department between last exterior wall board, lower exterior wall board, first gusset plate and the second gusset plate, third gusset plate is located last exterior wall board, first gusset plate, second gusset plate, A port between the lower outer wall panel, the second edge web and the side wall panel. According to the irregular box-shaped bridge tower node, the structure of the bridge tower node is optimized, the structural strength and the supporting performance of the bridge tower node are greatly improved, and the connection stability of all parts can be effectively improved and the deformation resistance of all parts can be improved through mutual matching of all parts, so that the requirements of construction and later-stage use are better met.

And stiffening plates are arranged on the inner walls of the upper outer wall plate, the lower outer wall plate and the side wall plates. The stiffening plate further improves the stability of the structure and increases the strength of the whole node structure.

Furthermore, all be equipped with a set of perforation on the inner wall of first limit web, well web and second limit web, the fenestrate inboard is equipped with the board of borduring.

Furthermore, stiffening plates are arranged on the inner walls of the first edge web plate, the middle web plate and the second edge web plate. The stiffening plate further improves the stability of the structure and increases the strength of the whole node structure.

Furthermore, the connecting structure further comprises a group of inner partition plates, wherein the inner partition plates are arranged between the two corresponding first node plates, the two corresponding second node plates and the two corresponding third node plates. The stability of the connection between the parts and the overall supporting strength are further improved.

Further, the inner partition plates comprise a first inner partition plate and a group of second inner partition plates, and the first inner partition plate is arranged between the two second inner partition plates.

Furthermore, the inner side of the second inner partition plate is provided with an edge sealing plate, the outer side of the second inner partition plate is provided with a group of open grooves, and the open grooves are matched with the corresponding stiffening plates.

Furthermore, the one end of first limit web and second limit web is equipped with the arc breach, the outside of arc breach is equipped with the arc shrouding.

The invention relates to a manufacturing method of an irregular box-shaped bridge tower node, which comprises the following specific steps:

1): the method comprises the following steps of (1) performing plate unit manufacturing of each plate in advance, namely performing unit manufacturing on an upper outer wall plate, a lower outer wall plate, a group of side wall plates, a first edge web plate, a middle web plate, a second edge web plate, a group of first gusset plates, a group of second gusset plates, a group of third gusset plates and an inner baffle plate;

2): welding a middle web plate, namely welding the middle web plate at the specified positions of the upper outer wall plate and the lower outer wall plate, and welding by adopting a full penetration welding line;

3): welding the inner baffles on the two sides of the middle web plate, namely respectively welding the first inner baffle and the group of second inner baffles on the two sides of the middle web plate;

4): welding a first edge web plate and a second edge web plate, namely correspondingly welding the first edge web plate and the second edge web plate on the outer side of the inner partition plate welded in the previous step;

5): welding inner baffles on one sides of the first edge web plate and the second edge web plate, which are far away from the middle web plate, namely correspondingly welding the first inner baffles and the second inner baffles on the outer sides of the first edge web plate and the second edge web plate;

6): welding an upper outer wall plate, a lower outer wall plate and a group of side wall plates by adopting local penetration welding seams;

7): welding a first gusset plate, a second gusset plate and a third gusset plate, namely welding each gusset plate at a corresponding position, wherein corner joints between the first edge web plate and the second edge web plate and the gusset plates are welded by adopting local penetration welding seams, and corner joints between the gusset plates and the upper outer wall plate, the lower outer wall plate, the group of side wall plates and the middle web plate are welded by adopting local penetration welding seams;

8): the corner joint between the stiffening plate and the framework is connected by adopting a local penetration welding seam, and the corner joint between the stiffening plate and the framework is welded by adopting a groove form with 35-degree double faces and 12mm roots.

The invention relates to a manufacturing method of an irregular box-shaped bridge tower node, which comprises the following specific steps:

in the manufacturing process, the arc-shaped sealing plates are welded in an assembling mode, the two sides of the arc-shaped sealing plates are welded in a groove mode of 35 degrees with 12mm roots, and the welding angle is 8 mm.

The technical scheme shows that the invention has the following beneficial effects:

1. according to the irregular box-shaped bridge tower node, the structure of the bridge tower node is optimized, the structural strength and the supporting performance of the bridge tower node are greatly improved, and the stability of connection of all parts can be effectively improved and the deformation resistance of the bridge tower node is improved through mutual matching of all parts, so that the bridge tower node can better meet the requirements of construction and later use.

2. In the invention, the inner walls of the upper outer wall plate, the lower outer wall plate and the side wall plate are all provided with stiffening plates; and stiffening plates are arranged on the inner walls of the first edge web plate, the middle web plate and the second edge web plate. The stiffening plate further improves the stability of the structure and increases the strength of the whole node structure.

3. According to the manufacturing method of the irregular box-shaped bridge tower node, the steps from blanking to cutting, then folding of each unit and final assembly are processed through a scientific and reasonable method, so that the accuracy of parts is guaranteed, the later processing quality is guaranteed, the problem that deformation is easy to occur in the current bridge tower processing process is well solved, and the construction requirement is better met.

Drawings

FIG. 1 is a schematic structural view of an irregular box pylon node according to the present invention;

FIG. 2 is a partial perspective view of the present invention;

FIG. 3 is a schematic illustration of the installation of a center web in the present invention;

FIG. 4 is a schematic view of the installation of a stiffener plate and T-face in accordance with the present invention;

fig. 5 is a schematic view of the construction of the first and second side webs of the present invention.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

Examples

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to be illustrative of the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more unless otherwise specified, unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be internal to both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

An irregular box pylon node as shown in the drawings, comprising: go up exterior wall panel 1, exterior wall panel 2 down, a set of side wall panel 3, first side web 4, well web 5, second side web 6, a set of first gusset plate 7, a set of second gusset plate 8 and a set of third gusset plate 9, it sets up relatively from top to bottom with exterior wall panel 2 down to go up exterior wall panel 1, side wall panel 3 locates the both sides of last exterior wall panel 1 and exterior wall panel 2 down, just the both sides of going up exterior wall panel 1 are connected with the upper end of side wall panel 3 through inclined wall panel 10, the both sides of exterior wall panel 2 are connected with the lower extreme of side wall panel 3 through inclined wall panel 10 down, first side web 4, well web 5 and second side web 6 are established perpendicularly between last exterior wall panel 1 and exterior wall panel 2 down, first gusset plate 7 is located the port department between last exterior wall panel 1, exterior wall panel 2 down, first side web 4 and side wall panel 3, second gusset plate 8 is located last exterior wall panel 1, The port department between outer wallboard 2, first gusset plate 7 and second gusset plate 8 down, the port department between last outer wallboard 1, lower outer wallboard 2, second sideboard 6 and the side wall board 3 is located to third gusset plate 9.

In this embodiment, the inner walls of the upper outer wall plate 1, the lower outer wall plate 2 and the side wall plate 3 are all provided with stiffening plates 11.

In this embodiment, the inner walls of the first side web 4, the middle web 5 and the second side web 6 are all provided with a group of through holes 12, and the inner sides of the through holes 12 are provided with edge sealing plates 13.

In this embodiment, the inner walls of the first edge web 4, the middle web 5 and the second edge web 6 are all provided with stiffening plates 11.

The present embodiment further includes a group of inner partition plates 14, and the inner partition plates 14 are disposed between the two corresponding first node plates 7, two corresponding second node plates 8, and two corresponding third node plates 9.

In this embodiment, the inner partition 14 includes a first inner partition 141 and a group of second inner partitions 142, and the first inner partition 141 is disposed between the two second inner partitions 142.

In this embodiment, the second inner partition 142 is provided with an edge sealing plate 1421 on the inner side and a group of opening grooves 1422 on the outer side, and the opening grooves 1422 are matched with the corresponding stiffening plates 11.

In this embodiment, the first side web 4 and the second side web 6 have an arc notch at one end, and an arc sealing plate 15 is disposed outside the arc notch.

The method for manufacturing the irregular box-shaped bridge tower node in the embodiment comprises the following specific steps:

1): the method comprises the following steps of (1) performing plate unit manufacturing of each plate in advance, namely performing unit manufacturing on an upper outer wall plate 1, a lower outer wall plate 2, a group of side wall plates 3, a first edge web plate 4, a middle web plate 5, a second edge web plate 6, a group of first node plates 7, a group of second node plates 8, a group of third node plates 9 and an inner partition plate 14;

2): welding a middle web plate 5, namely welding the middle web plate at the appointed positions of the upper outer wall plate 1 and the lower outer wall plate 2, and welding by adopting a full penetration welding line;

3): installing and welding the inner baffles 14 on two sides of the middle web 5, namely installing and welding a first inner baffle 141 and a group of second inner baffles 142 on two sides of the middle web 5 respectively;

4): welding the first side web plate 4 and the second side web plate 6, namely correspondingly welding the first side web plate 4 and the second side web plate 6 on the outer side of the inner partition plate 14 welded in the previous step;

5): welding the inner partition plate 14 on one side of the first edge web plate 4 and the second edge web plate 6 far away from the middle web plate 5, namely correspondingly welding the first inner partition plate 141 and the second inner partition plate 142 on the outer sides of the first edge web plate 4 and the second edge web plate 6;

6): welding an upper outer wall plate 1, a lower outer wall plate 2 and a group of side wall plates 3, and adopting local penetration welding seams to weld;

7): the first gusset plate 7, the second gusset plate 8 and the third gusset plate 9 are welded, namely, the gusset plates are welded at corresponding positions, the corner joints between the first edge web plate 4 and the second edge web plate 6 and the gusset plates are welded by adopting local penetration welding seams, and the corner joints between the gusset plates and the upper outer wall plate 1, the lower outer wall plate 2, the group of side wall plates 3 and the middle web plate 5 are welded by adopting local penetration welding seams;

8): the corner joints between the stiffening plates 11 and the framework are connected by local penetration welding seams, and the corner joints between the stiffening plates and the framework are welded in a groove form with 35-degree double faces and 12mm roots.

The method for manufacturing the irregular box-shaped bridge tower node in the embodiment comprises the following specific steps:

in the manufacturing process, the arc-shaped sealing plate 15 is welded in a groove mode of reserving 12mm on two sides at 35 degrees, and the welding angle is 8 mm.

In the method for manufacturing the irregular box-shaped bridge tower node in the embodiment, the specific requirements of manufacturing, assembling and welding the plate units of each plate block are as follows:

the steel materials need to be supplemented and compared for pretreatment before, namely: the steel plate is derusted, sprayed with primer in workshop and dried by special steel plate pretreatment production line, and the derusting quality of steel is guaranteed to reach Sa2.5 level. In addition, in order to ensure that the steel plate deforms in the steel plate hoisting process in the pretreatment process, the steel plate is hoisted and conveyed by magnetic force to avoid the clamping and hoisting of the tiger head so as to cause the local plastic deformation of the steel plate;

lofting, wherein lofting of all components of the project is performed by computer numerical lofting so as to ensure the precision of the components and create conditions for assembly in a factory and field installation; before setting out, the setting out personnel must be familiar with the construction drawings and the process requirements, and check the geometric dimensions of the components and the interconnection of the components and whether the connection is improper. If the construction drawing is found to have omission or error and other reasons need to change the construction drawing, the design change file of the original design unit sign must be obtained and cannot be modified without permission; when lofting, welding shrinkage allowance or large joint allowance is increased and decreased according to the process requirement, and the groove form is opened according to the welding process evaluation; after the lofting work is finished, the magnified sample, the sample rod and the sample plate (or a blanking picture) are self-checked and mutually inspected, and can be issued to a blanking workshop after being approved by a manager of a department;

marking (material marking):

1) and before material marking, the material and familiar process requirements are confirmed, and then material marking is carried out according to the layout, the blanking processing list, the batching card and the part sketch.

2) The base material of the material is required to be flat and straight without damaging other defects, such as cracks, interlayers, insufficient thickness and the like on the material, and the base material is required to be researched and processed in time; if there is a large bending or uneven surface of the steel, the steel should be corrected or removed.

3) And the material marking is combined by adopting a centralized material marking method, a nesting method, a statistical calculation method, a residual material unified material marking method and the like, so that reasonable nesting is performed, and the utilization rate of raw materials is improved to the maximum extent.

4) And material marking tolerance requirement:

5) and marking reference lines, center lines and inspection control points after material marking. The marking must be done without the use of tools such as chisels, and a small number of punches should be no deeper than 0.5mm and should not leave any permanent marks on the steel plate.

6) After the materials are numbered, the transplanting work of material marking is carried out according to the specification of the quality assurance manual of the company.

7) And the quality control of marking (material marking):

a. before material marking, a material marking person should be familiar with various symbols and marks noted in a blanking drawing and check the material brand, specification and furnace batch number. When the feeding or related departments do not make a material distribution and cutting (material discharge) plan, the material marking personnel should make a material cutting plan, reasonably discharge the materials and save the steel.

b. When materials are numbered, the specification of the used materials is rechecked, the appearance quality of the materials is checked, and a measurement table is made and recorded according to the characteristics of the used materials in the project. If the material specification is found not to meet the requirement or the material appearance is found not to meet the requirement, the quality control and the technical department need to report timely; when the bending or uneven value of the material is over-tolerance to affect the material quality, the material is required to be corrected and then the material with over-standard value is returned to the manufacturer.

c. According to different cutting requirements of sawing, cutting and the like and parts planed and milled, different cutting and machining allowances and welding shrinkage are preset.

d. When the length or the width of the raw material is not enough and the welding and the connection are needed to be long, the materials must be numbered at the same time so as to be beneficial to the connection; in addition, during material marking, the joint number of the splicing pieces and the shape and size of the welding groove need to be poured out. If the splicing pieces have the eyelets, the eyelets are processed after the splicing pieces are welded and corrected.

e. Parts of equal width or length are placed together as much as possible.

f. Parts with different specifications are respectively numbered and are sequentially numbered according to the principle of first-large and second-small.

g. After the material marking work is finished, foreign stamp marks are printed on a processing line, a seam line and a hole center position of a part according to specific conditions, meanwhile, the part is marked clearly by lead white paint according to processing marks, hole positions and the like on a sample plate, convenience is provided for the next procedure, in addition, whether the specification, the quantity and the like of the part are wrong or not needs to be checked, and material marking records are made.

Cutting of

1) Before cutting, oil stain, rust and moisture on the surface of the parent metal are removed; the gas cutting surface after cutting should be smooth and free of cracks, slag and flying objects.

2) And the inspection tolerance requirement of gas cutting:

item tolerance deviation

Length of the part is +/-1.0 mm

Width of parts, manufacturing wing and web plates of H steel: width of 0.5mm

A part plate: width of 0.5mm

The non-perpendicularity e t of the cutting surface is less than or equal to 20mm, and e is less than or equal to 1 mm; t is more than or equal to 20, e is less than or equal to t/20 and less than or equal to 2mm

The straightness of the plate edge is not more than 1.5mm

The depth of the cutting lines is 0.2mm

The depth of the local gap is less than or equal to 2mm, and the polishing is smooth and excessive. Polishing after electric welding repair of not less than 2mm to form smooth transition

The cutting edge is not more than 1mm

Bevel angle of +/-1.5 degrees

3) And removing cutting slag after cutting. For surfaces that cannot be finished after assembly, such as the inner surface of the arcuate locking notch, treatment should be performed prior to assembly. The right angle cuts on the drawings should be over-rounded.

4) After flame cutting, the size of the part is self-checked, then the part number and the part number to which the part belongs are marked, and then each index is specially checked by a quality inspector, and the part can flow into the next procedure after being qualified.

5) And controlling the cutting quality:

a. according to the requirements of engineering structures, the cutting of the components should firstly adopt numerical control, plasma, photoelectric, automatic or semi-automatic gas cutting, so as to reduce manual cutting and ensure the cutting precision.

Quality requirement of cut surface

Surface quality of automatic, semi-automatic, manual gas cutting edge

Positional item Standard Specification (mm) allowable Limit (mm)

Automatic and semi-automatic gas cutting 0.100.20 for main component on free edge of component

Manual gas cutting 0.150.30

Automatic, semi-automatic gas cutting 0.100.20 of secondary member

Manual gas cutting 0.501.00

Automatic and semi-automatic gas cutting 0.100.20 for main components of welding joint edge

Manual gas cutting 0.400.80

Automatic, semi-automatic gas cutting 0.100.20 of secondary member

Manual gas cutting 0.801.50

b. The steel material should be cut by selecting an optimum method according to its shape.

c. Before cutting, checking whether the specification and the grade of the material meet the requirements of the drawing or not.

d. The section of the notch has no defects of tearing, cracks, edges, slag inclusion, layering and the like and no edges larger than 1mm, and burrs are removed.

e. Before cutting, oil stain, rust and the like on the surface of the steel plate should be removed.

f. When cutting, the broken line symbol must be seen clearly to determine the cutting program.

g. The cutting precision requirement is as follows:

the unevenness is not more than 50 mu in grade 2

The upper edge melting degree is 1 grade and is less than or equal to 25 mu

Surface smoothness of not more than 50 mu in grade 2

And when the cutting quality does not meet the requirements, grinding by using a grinding wheel until the requirements are met.

6) And groove machining:

A) selection of machining tool

Selecting a semi-automatic cutting knife or an edge milling machine (machining is adopted for a thick plate groove)

B) And the inspection accuracy of groove machining

Part correction

1) The part correction is preferably carried out by cold correction, the environment temperature during the cold correction is not lower than-12 ℃, and the surface of the corrected steel material is not provided with obvious dents or other damages, otherwise, the steel material still needs to be shaped. Mechanical or thermal correction may also be used.

2) When the main stressed parts are bent in a cold working mode, the environment temperature is not lower than-5 ℃, the bending radius of the inner side is not smaller than 15 times of the plate thickness, the inner side is required to be roasted, and the roasting temperature is preferably controlled to be 900-1000 ℃. The edge of the bent part must not crack.

3) And when the thermal correction is adopted, the thermal correction temperature is controlled to be 600-800 ℃, and the overburning is strictly prohibited. After the correction, the temperature of the part should be slowly cooled, and before the temperature is reduced to the room temperature, the part steel is not required to be hammered or quenched by water.

4) The parts are formed by punching and only used on the secondary parts, and are corrected by a cold processing method, and cracks and tearing do not occur after correction.

Component assembly quality control

1) When the component is assembled, the thickness and the overall dimension of the part are required to be determined to be qualified, no cutting burr or notch exists, and the component can be assembled only after the part number, the direction and the dimension are required to be checked to be correct. The inspection index is the completion of the mutual inspection process of the parts or components.

2) When the component is assembled, yellow rust, slag, paint, moisture and the like in the range of 50mm at the welded part and two sides of the groove are removed; and the part to be welded should be polished to present a metallic luster by using a polishing machine. The inspection index is the cleaning quality standard of the part to be welded.

3) The assembly clearance and the groove size of the welding seam are controlled within the allowable tolerance range, and the out-of-tolerance part is corrected to meet the standard requirement.

4) The welding joint with an important structure is provided with an arc striking plate and an extraction plate at two ends of the joint, the groove form of the welding joint is similar to that of a welded joint, the extraction length of the welded joint is more than 60mm, the widths of the arc striking plate and the extraction plate are more than 100mm, the lengths of the arc striking plate and the extraction plate are more than 150mm, and the thickness of the arc striking plate and the extraction plate is not less than 10 mm; and after welding is finished, the arc striking plate and the lead-out plate are removed by flame cutting, and are polished to be flat, so that the arc striking plate and the lead-out plate can not fall down by hammering.

5) The components are inspected by quality inspection in hidden engineering before sealing, the damaged welding seams and paint are coated with shop primer again, and the components can be hidden after being approved by the general package and supervision inspection without the permission of the general package and supervision and can not be hidden without authorization.

6) The random addition of rigid supports to prevent welding deformation is not allowed, and random sparking and arc striking on the components are strictly forbidden.

7) When the rod piece is assembled, the adjacent welding seams are required to be staggered, the panel and the web plate are required to be staggered by 200mm, and the welding seams of the adjacent stiffening ribs are required to be staggered by at least 100 mm.

9. Welding quality assurance measure

1) Tack welding

The tack welding of the member is a part of the full-length weld, and therefore the tack weld is not allowed to have a defect such as a crack that cannot be finally melted into the full-length weld. Tack welding must be performed by certified welders.

Positioning the welding line must avoid the position of the edge and end of the product which is easy to be out of question in strength and technique; positioning welding of T-shaped joints is carried out symmetrically on two sides; and the positioning welding in the groove is avoided as much as possible.

The type of welding material adopted by the tack welding is matched with the welding material; the solder foot size should not be larger than 1/2 for the design solder foot.

The length and the interval of the positioning welding are determined according to the thickness, the structural form and the restraint degree of the base material, the positioning welding line is generally more than 30mm away from the end part of the designed welding line, the length of the welding line is 50-100mm, and the interval is 400-600 mm.

2) Tire clamp

The welding of the steel structure should use the jig as much as possible to effectively control the welding deformation and make the main welding work be carried out in the flat welding position.

3) Preheating the mixture

The proper preheating temperature and method should be determined according to the strength of steel materials (steel type, plate thickness, joint restraint degree, hydrogen content in welded joint metal and other factors) and the welding method used in the welding of the steel structure. The thickness of the carbon structural steel is more than 50mm, the thickness of the low-alloy high-strength structural steel is more than 25mm, and the preheating temperature before welding is preferably 80-120 ℃. The preheating zone is arranged at two sides of the welding bead, the width of the preheating zone is more than 2 times of the thickness of the weldment respectively, and the width of the preheating zone is not less than 80 mm.

Preheating temperature of the positioning welding and welding repair part is about 50 ℃ higher than normal preheating temperature, and a preheating area is properly widened to prevent welding cracks.

4) Inspection before welding

Before welding, a welder needs to check the groove size of a workpiece, the assembly quality of a joint and the cleaning condition of a welding area, and if the requirements are not met, the welder needs to finish the workpiece to be qualified and then the welding is allowed.

Before the formal welding starts or during the formal welding, cracks are found in the positioning welding, and the formal welding is carried out after the positioning welding is completely removed.

5) Temperature, weather and others

The surface of the base metal is wet (relative humidity) by 80% due to rainfall, snow and the like or in windy weather, and open-air welding cannot be carried out; however, if the welder and the welded portion are sufficiently protected and the base material is properly treated (e.g., heated, dehumidified), welding can be performed.

And secondly, the welding environment temperature of the low alloy steel is not lower than 5 ℃, and the welding environment temperature of the common carbon steel is not lower than 0 ℃.

When using CO2 semi-automatic gas shielded welding, the welding should be stopped in principle when the ambient wind speed is more than 2 m/s, but if appropriate wind shielding measures are used or a wind-resistant welding machine is used, the welding is still allowed (flux-cored arc welding may not be so limited).

6) Welding construction

(1) Striking and extinguishing of arc

During arc striking, the heating of the base material by the arc is insufficient, so that the occurrence of defects such as poor fusion, crater cracks, gas holes, slag inclusions and the like should be prevented during operation, and arc striking and arc scratch prevention should not be performed on the base material in the non-welding region.

When the electric arc is interrupted due to reasons or the end of the welding line is closed, crater cracks are prevented, particularly when CO2 semi-automatic gas protection is adopted, crater cracks are avoided, and once cracks occur, the welding flux can be continued after the cracks are thoroughly removed. Regardless of the welding method used, the crater at the end of the weld must be filled.

The automatic submerged arc welding has to start and extinguish arc on the striking plate which is 80mm away from the end of the rod piece, the arc should not be broken during welding, if the arc is broken, the arc-stopping position is planed into a slope of 1:5, and then the arc is struck and welded after being lapped for 50 mm.

After the rod is welded, the two end lead plates or the product test plate must be cut off by gas cutting and the cut is ground flat.

(2) And (3) finishing welding on one surface of the double-sided butt-joint welding seam requiring penetration, and completely removing the welding root defect before welding on the other surface until the front metal, and then carrying out reverse welding. But the adoption of the submerged arc automatic welding can ensure that the back chipping is not allowed under the condition of penetration welding.

Firstly, a butt groove welding seam of a back ceramic liner is adopted, and the liner and a base material are tightly jointed.

And secondly, butt welding with different plate thicknesses is processed into slope transition not larger than the design specification.

(3) Cleaning of the finished weld

And after welding, a welder cleans slag on the surface of the welding seam and splashes on two sides of the welding seam, inspects the appearance quality of the welding seam, and prints a steel seal of the welder on a position specified by the process after the welding seam is qualified.

7) Welding inspection

(1) Checked item and content

The welding inspection of the steel structure comprises two contents of inspection and acceptance, so the welding inspection cannot be limited to the welding inspection only after the welding is finished, and the welding inspection can be performed in the whole welding operation process, namely before the welding construction, during the welding construction and after the welding is finished. (details are shown in the following table)

Stage and content of weld inspection

Inspection phase inspection content

Alternate assembly before welding construction, groove structure, cleaning of welding area, tack welding quality, installation of extraction plate, and lining plate adhesion condition

Preheating temperature, welding material baking, welding material grade, specification, welding position, welding sequence, welding current, voltage, welding speed, interlayer temperature, slag cleaning during welding and back surface back chipping condition in welding construction

And (5) after welding, visually checking the surface shape of the welding seam. Weld size, undercut, surface porosity, surface cracks, surface pits, treatment of arc striking and extinguishing parts, unfused, arc striking and extinguishing plate treatment, steel seal and the like

Internal inspection for porosity, lack of penetration, slag inclusion, cracks, etc

(2) Visual inspection of weld

The specification of the acceptance standard of the construction quality in the steel structure process is as follows: the external dimension of the welding line accords with the specification of the existing national standard of the external dimension of the welding line of the steel structure, and the welding alternation external defect segmentation accords with the specification of the existing national standard of the welding quality guarantee, the requirement of the steel melting welding head and the defect classification.

(3) Internal defect inspection of weld

Firstly, the internal defect inspection of the welding seam of the steel structure generally adopts ultrasonic flaw detection, and all the welding seams requiring full penetration in the project are subjected to 100 percent ultrasonic flaw detection. When the melting depth requirement is designed, the method is executed according to the design requirement.

Nondestructive inspection, namely, the carbon structural steel can be detected when the welding line is cooled to the ambient temperature; the low alloy high strength structural steel should be tested 24 hours after completion. When the thickness exceeds 40mm, the detection should be carried out after 48 hours or more.

And thirdly, when the quality of the ultrasonic flaw detection is questioned, detecting by adopting X rays or gamma rays.

10. Post-weld orthopedic of components

The box body is placed on a horizontal jig frame to be carefully detected for the correction of the side bending and the distortion generated after the welding of the box-shaped rod piece, the side bending detection adopts a visual inspection and wire drawing method, and the distortion detection adopts a method of combining a wire hanging hammer and a wire drawing method. Marking the part to be corrected and selecting the correct flame correcting method. The flame of the baking device is not too close to the component, and the flame distance is controlled within an effective range according to the plate thickness. The heating area of the correction part is not too large on one section, and a plurality of sections are selected. The heating position should be finished once and repeated heating should not be carried out at the same position.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims (10)

1. An irregular box-shaped bridge tower node, characterized in that: the method comprises the following steps: go up out wallboard (1), lower wallboard (2), a set of side wall board (3), first edge web (4), well web (5), second edge web (6), a set of first gusset plate (7), a set of second gusset plate (8) and a set of third gusset plate (9), it sets up relatively from top to bottom with lower wallboard (2) to go up wallboard (1), the both sides of wallboard (1) and lower wallboard (2) are located in side wall board (3), just go up the both sides of wallboard (1) and be connected with the upper end of wallboard (3) through inclined wall board (10), the both sides of wallboard (2) are connected with the lower extreme of wallboard (3) through inclined wall board (10) down, first edge web (4), well web (5) and second gusset plate (6) are located perpendicularly between wallboard (1) and lower wallboard (2), first gusset plate (7) are located wallboard (1), and are located, Port department between lower outer wallboard (2), first edge web (4) and side wall board (3), port department between last outer wallboard (1), lower outer wallboard (2), first node board (7) and second node board (8) is located in second node board (8), port department between last outer wallboard (1), lower outer wallboard (2), second edge web (6) and side wall board (3) is located in third node board (9).

2. An irregular box-bridge tower node according to claim 1, wherein: and stiffening plates (11) are arranged on the inner walls of the upper outer wall plate (1), the lower outer wall plate (2) and the side wall plates (3).

3. An irregular box-bridge tower node according to claim 1, wherein: all be equipped with a set of perforation (12) on the inner wall of first edge web (4), well web (5) and second edge web (6), the inboard of perforation (12) is equipped with board of borduring (13).

4. An irregular box-bridge tower node according to claim 1, wherein: and stiffening plates (11) are arranged on the inner walls of the first edge web plate (4), the middle web plate (5) and the second edge web plate (6).

5. An irregular box-bridge tower node according to claim 1, wherein: the novel connecting structure further comprises a group of inner partition plates (14), wherein the inner partition plates (14) are arranged between the two corresponding first node plates (7), the two corresponding second node plates (8) and the two corresponding third node plates (9).

6. An irregular box-bridge tower node according to claim 5, wherein: the inner baffle plate (14) comprises a first inner baffle plate (141) and a group of second inner baffle plates (142), and the first inner baffle plate (141) is arranged between the two second inner baffle plates (142).

7. An irregular box-bridge tower node according to claim 5, wherein: the inner side of the second inner partition plate (142) is provided with an edge sealing plate (1421), the outer side of the second inner partition plate is provided with a group of open grooves (1422), and the open grooves (1422) are matched with the corresponding stiffening plates (11).

8. An irregular box-bridge tower node according to claim 1, wherein: one end of the first edge web plate (4) and one end of the second edge web plate (6) are provided with arc-shaped notches, and arc-shaped sealing plates (15) are arranged on the outer sides of the arc-shaped notches.

9. A method of making an irregular box-type pylon node according to claim 1 wherein: the specific preparation method comprises the following steps: 1): the method comprises the following steps of (1) performing plate unit manufacturing of each plate in advance, namely performing unit manufacturing on an upper outer wall plate (1), a lower outer wall plate (2), a group of side wall plates (3), a first edge web plate (4), a middle web plate (5), a second edge web plate (6), a group of first node plates (7), a group of second node plates (8), a group of third node plates (9) and an inner partition plate (14);

2): welding a middle web plate (5), namely welding the middle web plate at the designated positions of the upper outer wall plate (1) and the lower outer wall plate (2), and welding by adopting a full penetration welding line;

3): installing and welding inner baffles (14) at two sides of the middle web plate (5), namely installing and welding a first inner baffle (141) and a group of second inner baffles (142) at two sides of the middle web plate (5) respectively;

4): welding a first side web plate (4) and a second side web plate (6), namely correspondingly welding the first side web plate (4) and the second side web plate (6) on the outer side of the inner partition plate (14) welded in the previous step;

5): welding an inner baffle plate (14) on one side of the first edge web plate (4) and the second edge web plate (6) far away from the middle web plate (5), namely correspondingly welding a first inner baffle plate (141) and a second inner baffle plate (142) on the outer sides of the first edge web plate (4) and the second edge web plate (6);

6): welding an upper outer wall plate (1), a lower outer wall plate (2) and a group of side wall plates (3) by adopting local penetration welding seams;

7): the method comprises the following steps of (1) installing and welding a first gusset plate (7), a second gusset plate (8) and a third gusset plate (9), namely installing and welding each gusset plate at a corresponding position, welding corner joints between a first edge web plate (4) and a second edge web plate (6) and the gusset plates by adopting local penetration welding seams, and welding corner joints between the gusset plates and an upper outer wall plate (1), a lower outer wall plate (2), a group of side wall plates (3) and a middle web plate (5) by adopting local penetration welding seams;

8): the corner joints between the stiffening plates (11) and the framework are connected by local penetration welding seams, and the corner joints between the stiffening plates and the framework are welded in a groove form with 35-degree double faces and 12mm roots.

10. A method of making an irregular box-type pylon node according to claim 1 wherein: the specific preparation method comprises the following steps:

in the manufacturing process, the arc-shaped sealing plate (15) is welded in a groove mode of reserving 12mm roots at 35 degrees on two sides, and the welding angle is 8 mm.

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