CN215999183U

CN215999183U - Non-turnover welded steel box arch

Info

Publication number: CN215999183U
Application number: CN202122406041.9U
Authority: CN
Inventors: 裴雪峰; 薛长利; 车平; 刘治国; 张剑峰
Original assignee: China Railway Baoji Bridge Group Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-03-11
Anticipated expiration: 2031-09-30

Abstract

The steel box arch without turnover welding comprises a bottom plate, a top plate, an outer web plate and an inner web plate; the outer web plate and the corner wall plate are provided with a welding seam I; welding seams II are respectively arranged at the upper end of the bottom plate, the upper end of the top plate and the corner wall plate; the weld joint I and the weld joint II are both single-side weld joint structures with outward groove directions; welding seams III are respectively formed between the lower end of the bottom plate and the lower end of the top plate and the corner wall plate; the welding seam III is a double-sided K-shaped welding seam structure; the inner web plate and the corner wall plate are provided with a welding seam IV; the welding line IV is a single-side welding line structure with the groove direction facing inwards, and a liner is arranged on the outer side of the welding line IV during welding. The utility model discloses an improved generation welding groove design will face upward the position welding seam and become the position welding seam of bowing, realizes that the scene that the steel case arched does not have upset all-position welding operation, plays cost reduction and efficiency, reduces the safety risk, reduces the welding degree of difficulty, improves welding quality's purpose.

Description

Non-turnover welded steel box arch

Technical Field

The utility model belongs to the technical field of the steel encircles case is made, concretely relates to no upset welded steel case encircles.

Background

Large steel box arch segments are generally constructed in an octagonal configuration from a top plate 1, a bottom plate 2, an outer web 3, an inner web 4, corner panels 5, and bulkheads 6 (see fig. 1). When the components are manufactured in a tailor welding mode, due to stress requirements, all corner welding seams of the components are required to be full penetration welding seams. Because the full penetration welding line has good force transmission effect, the welding requirement of the welding line is high, and the welding difficulty is high. Taking the steel box arch segment with the top plate and the bottom plate of 36-60mm thick and the corner wall plate 5 of 30-40mm thick as an example: the welding groove design is comparatively simple, only need the welding groove the direction towards the case outside can, can reach all welding seams and can bow the position welded requirement through upset steel case arch. Therefore, according to the conventional groove design method, the welding groove of the inner web 4 and the corner wall plate 5 (as shown in fig. 2 and 3) should be formed on the corner wall plate 5 of the thin plate. However, if the steel box arch is not welded in an overturning way, the welding seam at the position needs to be welded at the lower position (combining with the figure 1); (as shown in fig. 4 and 5), the welding seams of the top plate 1, the bottom plate 2 and the corner wall plate 5 also need to be welded at the upward position, the upward position is difficult to weld, the appearance of the welded welding seams is poor, the welding efficiency is low, a large amount of labor is occupied, and the welding quality cannot be guaranteed. Therefore, when the steel box arch segment is welded and manufactured, the overturning welding technology is adopted, and the main purpose of the overturning welding technology is to change an upward welding seam into a downward welding seam, so that the purposes of reducing the operation difficulty and ensuring the welding quality are achieved. In theory and practice, the horizontal or transverse welding technology adopted by the turnover welding technology has stable quality and high construction speed.

However, the existing overturning welding technology has high requirements on the hoisting capacity and the field area of a manufacturing field, and has large one-time investment and high safety risk. Large-scale steel case arch belongs to super large overweight component, if the upset operation, at first need have the hoisting equipment who satisfies the hoist and mount ability to and sufficient operation place, and will drop into a large amount of auxiliary personnel, the safety risk is big. From the actual construction, a large number of construction machines are only put into the welding operation of the components, the economy is not high, and certain safety management risks need to be borne. In view of this, the following technical solutions are proposed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: the steel box arch without turnover welding is provided, and turnover-free welding manufacturing of the steel box arch is realized; the overhead welding is changed into overhead welding, and the technical problems that the turnover welding of the steel box arch wastes labor, time and energy, the safety risk is high, the site is limited and the equipment investment is overlarge are solved.

The utility model adopts the technical proposal that: the steel box arch is welded without overturning and comprises a bottom plate and a top plate which are vertically arranged at the left side and the right side; the steel box arch also comprises an outer web plate horizontally arranged above and an inner web plate horizontally arranged below; the upper ends of the bottom plate and the top plate are respectively welded and fixedly connected with the left end and the right end of the outer web into a whole through corner wall plates; the lower ends of the bottom plate and the top plate are fixedly connected with the left end and the right end of the inner web plate into a whole through corner wall plates respectively; the outer web plate and the corner wall plate are provided with a welding seam I; welding seams II are respectively arranged at the upper end of the bottom plate, the upper end of the top plate and the corner wall plate; the weld joint I and the weld joint II are both single-side weld joint structures with outward groove directions; welding seams III are respectively formed between the lower end of the bottom plate and the lower end of the top plate and the corner wall plate; the welding seam III is a double-sided K-shaped welding seam structure; the inner web plate and the corner wall plate are provided with a welding seam IV; the welding line IV is a single-side welding line structure with the groove direction facing inwards, and a liner is arranged on the outer side of the welding line IV during welding.

In the above technical solution, further: the liner is a ceramic liner.

The utility model has the advantages compared with the prior art:

1. in the eight welding seams of the utility model, the two welding seams of the inner web plate and the corner wall plate, and the two welding seams of the lower end of the top plate and the bottom plate and the corner wall plate adopt special groove design, and the other welding seams all adopt conventional groove design, so that the whole penetration welding seam which is originally required to be welded in the upward position is completely adjusted into the welding in the downward position; therefore, the on-site non-turnover all-position welding operation of the steel box arch is realized, and the purposes of reducing cost and improving efficiency, reducing safety risk, reducing welding difficulty and improving welding quality are achieved.

2. The utility model discloses consider the easy processing nature of the convenient and welding groove of welding, with interior web and bight wallboard welding seam design for the single face groove form of groove inwards, through the special liner of customization, realize the purpose of single face welding double-sided shaping.

3. The utility model discloses because roof lower extreme, bottom plate lower extreme possess two-sided welding's condition with the bight wallboard respectively, therefore with top, bottom plate lower extreme and design of bight wallboard welding seam form for two-sided K type, will need turn into the soldering of flat position, horizontal position at the position welded welding seam of facing upward originally, reduced the welding operation degree of difficulty, improved welding efficiency, guaranteed welding quality.

4. The utility model discloses need not additionally increase the material and with the help of auxiliary facilities, only through the design to the welding groove, just can reach the purpose that reduces the welding operation degree of difficulty, improves welding quality.

5. The utility model is simple in operation, can improve the efficiency of construction, reduce equipment and drop into, reduce safe risk.

6. The utility model discloses convenient easy going, the practicality is strong, adopts little improvement, and it does not have upset welding groove design to provide a better solution to arch class component for large-scale steel case.

Drawings

FIG. 1 is a perspective view of a lower steel box arch of the prior art;

FIG. 2 is an enlarged detail structure schematic diagram of a lower steel box arch inner web and a corner wall plate before tailor welding in the prior art;

FIG. 3 is an enlarged detail view of a prior art lower steel box arch after welding of an inner web and a corner wall plate;

FIG. 4 is an enlarged detail structure schematic diagram of a prior art lower steel box arch top plate and a corner wall plate before tailor welding;

FIG. 5 is an enlarged detail view of a prior art lower steel box arch top panel and corner wall panel after welding;

FIG. 6 is a front view of the steel box arch of the present invention;

fig. 7 is a schematic structural view of the portion a of the external web and the corner wall plate in fig. 6 before welding according to the present invention;

FIG. 8 is a schematic view of the structure of the part A of FIG. 6 after welding according to the present invention;

fig. 9 is a schematic structural view of the upper end of the top plate at the B part and the corner wall plate of fig. 6 before welding according to the present invention;

FIG. 10 is a schematic view of the structure of the part B of FIG. 6 after welding according to the present invention;

fig. 11 is a schematic structural view of the lower end of the C-shaped top plate and the corner wall plate of fig. 6 before welding;

FIG. 12 is a schematic view of the structure of the C-shaped portion of FIG. 6 after welding according to the present invention;

fig. 13 is a schematic structural view of the present invention before welding the D-portion inner web and the corner wall plate in fig. 6;

fig. 14 is a schematic view of the structure of fig. 6 after D is welded;

FIG. 15 is a flow chart of a method for manufacturing a steel box arch according to the present invention;

in the figure: 1-top plate, 2-bottom plate, 3-outer web plate, 4-inner web plate, 5-corner wall plate and 6-clapboard; 701-welding groove I, 702-welding groove II, 703-welding groove III, 704-welding groove IV and 705-gasket; 801-weld I, 802-weld II, 803-weld III, 804-weld IV.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 6 to 15 in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses a no upset welded steel case encircles. (as shown in fig. 6) the steel box arch comprises a bottom plate 2 and a top plate 1 which are vertically arranged at the left side and the right side. The left side is taken as a bottom plate 2 and the right side is taken as a top plate 1. The steel box arch further comprises an outer web plate 3 horizontally arranged above and an inner web plate 4 horizontally arranged below. The upper ends of the bottom plate 2 and the top plate 1 are fixedly connected with the left end and the right end of the outer web 3 into a whole through corner wall plates 5. The lower ends of the bottom plate 2 and the top plate 1 are fixedly connected with the left end and the right end of the inner web plate 4 into a whole through the corner wall plate 5.

The utility model discloses an improvement lies in: the outer web 3 and the corner wall 5 have a weld i 801. (see fig. 8) the upper end of the bottom panel 2, the upper end of the top panel 1 and the corner wall panel 5 are provided with welds ii 802 (see fig. 10). And the welding seam I801 and the welding seam II 802 are both single-side welding seam structures with outward groove directions. The welding seam structure adopts the traditional method for welding, and the depression welding operation can be realized.

The lower ends of the bottom plate 2 and the top plate 1 and the corner wall plate 5 are respectively provided with a welding seam III 803; the welding seam III 803 is a double-sided K-shaped welding seam structure. And welding by adopting a double-sided K-shaped welding seam structure. The utility model discloses because 1 lower extreme of roof as shown in fig. 6, 2 lower extremes of bottom plate possess two-sided welding condition with bight wallboard 5 respectively, therefore with top, bottom plate lower extreme and 5 welding seam form designs of bight wallboard for two-sided K type, will need turn into the soldering joint of the position of inclining upward welded originally, horizontal position welding, reduced the welding operation degree of difficulty, improved welding efficiency, guaranteed welding quality.

(as shown in figure 14) the inner web 4 and corner wall panel 5 have a weld iv 804; the welding line IV 804 is a single-side welding line structure with an inward groove, and when the welding line IV 804 is welded, a gasket 705 is arranged on the outer side of the groove of the welding line IV 804. In the above embodiment, further: the liner 705 is a ceramic liner. The utility model discloses consider the easy processing nature of welding the facility and welding groove of executing welding, with the interior web 4 and the interior IV 804 design of welding seam between the bight wallboard 5 for the single face groove form of groove inwards, through the special liner of customization, realize the purpose of single-side welding double-sided shaping.

In the eight welding seams of the utility model, the two welding seams of the inner web plate 4 and the corner wall plate 5, and the two welding seams of the lower ends of the top plate 1 and the bottom plate 2 and the corner wall plate 5 adopt special groove design, and the other welding seams all adopt conventional groove design, so that the whole adjustment of the full penetration welding seam which is originally required to be welded at the upward position is changed into the welding at the downward position; therefore, the on-site non-turnover all-position welding operation of the steel box arch is realized, and the purposes of reducing cost and improving efficiency, reducing safety risk, reducing welding difficulty and improving welding quality are achieved.

The utility model discloses a theory of operation does: when the manufacturing scheme of the steel box arch is adopted, the welding seams between the left end and the right end of the inner web plate 4 and the corner wall plate 5 are designed into a single-side groove form in consideration of welding convenience and easy processability, and the purpose of single-side welding and double-side forming is achieved by customizing the special liner 705. And the lower ends of the top plate and the bottom plate and the corner wall plate 5 have double-sided welding conditions, so that the welding seam form of the lower ends of the top plate and the bottom plate and the corner wall plate 5 is designed to be a double-sided K type: the two grooves have the greatest advantages that the welding seam which needs to be welded at the upward position originally is converted into horizontal position and transverse position welding, the welding operation difficulty is reduced, the welding efficiency is improved, and the technical problem that the full penetration welding seam of the original inner web plate and the original corner wall plate, and the top plate, the bottom plate and the corner wall plate needs to be welded at the upward position is solved.

(as shown in fig. 6 and 15), the novel steel arch box non-turnover welding method of the present invention comprises the following steps:

and S001, making a steel arch box welding scheme. The formulated welding scheme of the steel arch box comprises the following steps: firstly, welding and fixing the inner web plate 4 with the corner wall plates 5 at the left side and the right side respectively; then the lower ends of the top plate 1 and the bottom plate 2 are welded with the corner wall plate 5 into a whole; welding the partition plate 6 with the inner web plate 4, the lower end corner wall plate 5, the top plate 1 and the bottom plate 2; then the upper ends of the top plate 1 and the bottom plate 2 are welded with the corner wall plate 5 into a whole; and then the outer web 3 is respectively welded with the corner wall plates 5 at the left side and the right side, and finally welding seams of the partition plate 6, the corner wall plate 5 at the upper end and the outer web 3 are welded. All welding seams should be symmetrically welded on both sides simultaneously.

And S002, analyzing the welding characteristics of different positions of the steel arch box, and designing a full-depression welding groove. The purpose of the designed welding groove is to realize the non-turnover welding of the steel arch box.

And S003, performing a welding process test according to the designed full-depression welding groove. The welding process test is a test for detecting the capability of the metal material to be welded into a member with specified design requirements under limited construction conditions and meet the preset service requirements. The situation of the metal material after welding under certain process conditions can be known as follows: the possibility of cracking of the welded joint, i.e., good and bad crack resistance; the welding joint has reliability in use, including mechanical properties and other special properties of the joint: heat resistance, corrosion resistance, low temperature resistance, fatigue resistance, aging resistance and the like.

And step S004, optimizing and perfecting the welding groove according to the test result. Such as determining the angle of the welding groove, the groove gap and the cross-sectional area of the weld.

And S005, welding and assembling the steel arch box without overturning according to the optimized welding groove. (see fig. 6) the steel arch box is assembled by tailor welding according to the welding scheme of step S001.

In the above embodiment, the welding groove in step S005 includes the welding groove i 701 of the outer web 3 and the corner wall plate 5. The welding groove I701 is a groove with an outward included angle of 60 degrees. (as shown in fig. 7). The welding groove II 702 (shown in FIG. 9) of the upper end of the bottom plate 2, the upper end of the top plate 1 and the corner wall plate 5. And the welding groove II 702 is of a groove structure with an outward included angle of 58 degrees. The welding groove I701 and the welding groove II 702 are both single-side groove structures with outward groove directions. Thus, the outer web 3 and the corner wall plate 5, and the upper end of the bottom plate 2 and the upper end of the top plate 1 are welded to the corner wall plate 5 in a depression position. (see FIG. 11) the welding groove III 703 of the lower end of the bottom plate 2, the lower end of the top plate 1 and the corner wall plate 5. The welding groove III 703 is a double-sided K-shaped groove structure. The included angle of the double-sided K-shaped groove of the welding groove III 703 is 45 degrees, so that the requirements of double-sided welding are met, and the requirements of structural rigidity and structural strength are met. (see fig. 13) welding groove iv 704 of inner web 4 and corner wall 5. The welding groove IV 704 is of a single-side groove structure with an inward groove direction, and a gasket 705 is arranged on the outer side of the welding groove IV 704. Wherein the included angle of the welding groove IV 704 is 50 degrees. The liner 705 is a ceramic liner. The shape of the pad 705 is shown in fig. 13. The middle part of the liner 705 is provided with an arc-shaped groove which is matched with the groove central line of the welding groove IV 704.

S006, inspecting the welding groove according to the steel arch box construction standard. The steel arch box construction standard is as follows: highway bridge and culvert construction technical specification (JTG/T F50-2011) and steel structure welding specification (GB 50661-2011).

To sum up, the utility model discloses need not additionally increase the material and with the help of auxiliary facilities, only through the design to the welding groove, just can reach the purpose that reduces the welding operation degree of difficulty, improves welding quality. The utility model is simple in operation, can improve the efficiency of construction, reduce equipment and drop into, reduce safe risk. The utility model discloses convenient easy going, the suitability is strong, adopts little improvement, and it does not have upset welding groove design to provide a better solution for large-scale steel case arch class component.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. The steel box arch is welded without overturning and comprises a bottom plate (2) and a top plate (1) which are vertically arranged on the left side and the right side; the steel box arch also comprises an outer web plate (3) horizontally arranged above and an inner web plate (4) horizontally arranged below; the upper ends of the bottom plate (2) and the top plate (1) are fixedly connected with the left end and the right end of the outer web plate (3) into a whole through corner wall plates (5) respectively; the lower ends of the bottom plate (2) and the top plate (1) are fixedly connected with the left end and the right end of the inner web plate (4) into a whole through corner wall plates (5) respectively in a welding manner; the method is characterized in that: the outer web (3) and the corner wall plate (5) are provided with a welding seam I (801); the upper end of the bottom plate (2), the upper end of the top plate (1) and the corner wall plate (5) are respectively provided with a welding seam II (802); the welding seam I (801) and the welding seam II (802) are both single-side welding seam structures with outward groove directions; the lower end of the bottom plate (2) and the lower end of the top plate (1) are respectively provided with a welding seam III (803) with the corner wall plate (5); the welding seam III (803) is a double-sided K-shaped welding seam structure; the inner web plate (4) and the corner wall plate (5) are provided with a welding seam IV (804); the welding line IV (804) is of a single-side welding line structure with an inward groove, and a gasket (705) is arranged on the outer side of the welding line IV (804) during welding.

2. The non-flip welded steel box arch of claim 1 wherein: the liner (705) is a ceramic liner.