A flange positioning structure and a method for accurately controlling the positioning of the flange of a steel pipe arch rib segment

Abstract

The present invention provides a flange positioning structure and a method for accurately controlling the positioning of the flange of a steel pipe arch rib segment, belonging to the field of bridge engineering. The flange positioning structure is used for positioning the steel pipe connection of two adjacent steel pipe arch rib segments, and includes: a flange, a long strip steel plate, and a connecting steel plate. The flange includes a flange disc. There are two connecting steel plates, which are symmetrically distributed along the radial direction of the flange disc and welded to the side wall of the flange disc. There are two long strip steel plates, which are respectively welded to the outer ends of the two connecting steel plates. The beneficial effect of the present invention is that by measuring the center coordinates of the pipe orifices of two adjacent steel pipes, calculating the center coordinates of the flange disc and the coordinates of the top edge and bottom edge of the flange disc corresponding to the steel pipe, and then through the use of the long strip steel plates with markings and the connecting steel plates, the accurate positioning of the flange is achieved by using these coordinates, ensuring the orthogonal arrangement of the flange and its steel pipe axis.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge engineering, and relates to a flange positioning structure and a method for accurately controlling the positioning of the flange of a steel pipe arch rib segment. Background Art

[0002] Most of the steel pipe arch ribs of concrete-filled steel tube arch bridges are constructed by the method of cantilever erection with inclined cable bracing. The steel pipe arch rib is divided into several steel pipe arch rib segments along the span direction. The steel pipe arch rib segment includes a steel pipe and web members. There are several steel pipes and web members. The adjacent steel pipes and web members are hinged. The adjacent two steel pipes are temporarily connected by flanges first, and after being installed in place, the patch steel pipes between the steel pipes are welded to complete the connection of the steel pipe arch rib segment.

[0003] However, in engineering practice, it is often found that the flange disk is not orthogonal to the center line of the steel pipe, resulting in the problem that the flange disks cannot be closely attached when the steel pipe arch rib segment is installed. The reasons for the problem are as follows: (1) The construction sequence is incorrect. In the existing construction, the stiffening rib plate on one side is first welded to the steel pipe, then the flange disk is welded, and then the stiffening rib plate on the other side is welded. The stiffening rib plate is not accurately positioned before welding; (2) The manufacturing deviation of the cross-section of the steel pipe nozzle is ignored. For example, in the case where one side of the steel pipe nozzle is high and the other side is low, the lengths of the upper end and the lower end of the nozzle are directly measured, and the midpoint bisecting this length is used as the position of the flange disk, which will also result in inaccurate welding positions of the flange disks. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the flange positioning structure and the method for accurately controlling the positioning of the flange of the steel pipe arch rib segment provided by the present invention calculate the center coordinates of the flange disk, as well as the coordinates of the top edge and the bottom edge of the flange disk corresponding to the steel pipe by measuring the center coordinates of the nozzles of two adjacent steel pipes. Then, through the use of the long strip steel plates with marks and the connecting steel plates, the precise positioning of the flange is realized by using these coordinates, ensuring the orthogonal arrangement of the flange and its steel pipe axis.

[0005] The technical solution adopted by the present invention is a flange positioning structure for positioning at the connection of steel pipes of two adjacent steel pipe arch rib segments, including: a flange, a long strip steel plate, and a connecting steel plate. The flange includes a flange disk. There are two connecting steel plates, which are symmetrically distributed along the radial direction of the flange disk and welded to the side wall of the flange disk. There are two long strip steel plates, which are respectively welded to the outer ends of the two connecting steel plates.

[0006] Preferably, the two long strip steel plates are respectively welded between the top edges and the bottom edges of the two steel pipe arch rib segments, and marks are engraved at the welding positions of the long strip steel plates and the connecting steel plates.

[0007] Preferably, the adjacent two steel pipes are flange-connected.

[0008] Preferably, six stiffening rib plates are welded to the edges of both surfaces of the flange disc, and the ends of the stiffening rib plates are welded to the inner walls of adjacent steel pipes.

[0009] Another technical solution adopted by the present invention is a method for accurately controlling the positioning of the flange of the steel pipe arch rib section. This method uses a flange positioning structure, which is used for positioning at the connection of the steel pipes of two adjacent steel pipe arch rib sections, and includes: a flange, a long strip steel plate, and a connecting steel plate. The flange includes a flange disc. There are two connecting steel plates, which are symmetrically distributed along the radial direction of the flange disc and welded to the side wall of the flange disc. There are two long strip steel plates, which are respectively welded to the outer ends of the two connecting steel plates, and the method includes the following steps:

[0010] S1: Prepare a number of the above-mentioned steel pipes, flanges, long strip steel plates, and connecting steel plates;

[0011] S2: Accurately measure the center coordinates of the adjacent ports of two adjacent steel pipes, the center coordinates of the flange disc, and the top edge coordinates and bottom edge coordinates of the flange disc corresponding to the steel pipe;

[0012] S3: Weld a long strip steel plate between the top edges and bottom edges of two adjacent steel pipes respectively;

[0013] S4: Take two connecting steel plates and symmetrically distribute them along the radial direction of the flange disc and weld them to the side wall of the flange disc. Then place the flange between two adjacent steel pipes and two long strip steel plates, and then weld the two connecting steel plates to the inner walls of the two long strip steel plates respectively, thereby completing the accurate positioning of the flange.

[0014] Preferably, according to the center coordinates of the adjacent ports of two steel pipes, the calculation formula for the center coordinates of the flange disc is:

[0015]

[0016] wherein, (X A , Y A ), (X B , Y B ) respectively represent the center coordinates of the adjacent ports of two steel pipes, and (X C , Y C ) represents the center coordinates of the flange disc.

[0017] Preferably, according to the center coordinates of the flange disc, the calculation formula for the top edge coordinates and bottom edge coordinates of the flange disc corresponding to the steel pipe is:

[0018]

[0019] wherein, (X C1 , YC1 )、(X C2 ,Y C2 ) respectively represent the coordinates of the top edge and bottom edge of the steel pipe corresponding to the flange disk, D represents the outer diameter of the steel pipe, and α represents the horizontal inclination angle from the center coordinate of the flange disk to the top edge or bottom edge of the steel pipe.

[0020] Preferably, in S3, the following steps are further included:

[0021] S31: Use a cutter to engrave a mark on the inner wall of the long steel plate, and make the marks on the two long steel plates accurately align with the coordinates of the top edge and bottom edge of the steel pipe respectively, and the mark is located at the center of two adjacent steel pipes.

[0022] Preferably, the two connecting steel plates are respectively aligned with the two marks.

[0023] Preferably, in S4, the following steps are further included:

[0024] S41: After the flange disk is accurately positioned, prepare several stiffening rib plates, weld six stiffening rib plates on the edges of both surfaces of the flange disk, and then weld the ends of the stiffening rib plates to the inner walls of the adjacent steel pipes to fix the flange disk to the steel pipe;

[0025] S42: Cut off the long steel plate and the connecting steel plate, and the welding construction of the steel pipe and the flange is completed. By analogy, the construction of all flanges of the steel pipe arch rib can be completed.

[0026] The beneficial effects of the present invention are:

[0027] By measuring the center coordinates of the pipe orifices of two adjacent steel pipes, calculating the center coordinates of the flange disk and the coordinates of the top edge and bottom edge of the flange disk corresponding to the steel pipe, and then using the long steel plate with marks and the connecting steel plate, the accurate positioning of the flange is realized by using these coordinates, ensuring the orthogonal arrangement of the flange and its steel pipe axis. Even if there are manufacturing deviations in the cross-section of the steel pipe orifice, it will not affect the position of the flange disk, and it is beneficial to accurately weld the stiffening rib plates between the steel pipe and the flange disk in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the overall front view sectional structure schematic diagram of the present invention;

[0029] Figure 2 is for the present invention Figure 1 the schematic diagram of the E-E sectional structure in.

[0030] Markings in the figure: steel pipe 1, flange disk 2, long steel plate 3, mark 4, connecting steel plate 5, stiffening rib plate 6. DETAILED DESCRIPTION OF THE INVENTION

[0031] The present invention will be described in detail below in conjunction with specific embodiments.

[0032] A flange positioning structure, which is used for positioning at the connection of steel pipes 1 of adjacent two steel pipe arch rib segments. The flange positioning structure includes: a flange, a long strip steel plate 3, and a connecting steel plate 5. The flange includes a flange disc 2. There are two connecting steel plates 5, which are symmetrically distributed along the radial direction of the flange disc 2 and welded to the side wall of the flange disc 2. There are two long strip steel plates 3, which are respectively welded to the outer ends of the two connecting steel plates 5;

[0033] The two long strip steel plates 3 are respectively welded between the top edges and the bottom edges of two steel pipe arch rib segments, and the flanges of the adjacent two steel pipes 1 are connected;

[0034] Specifically, when connecting adjacent two steel pipe arch rib segments, it is necessary to make a temporary connection through the flange of each steel pipe 1, and it is required that the flange is orthogonal to the axis of the steel pipe 1. As Figure 1-2 shown, in this solution, two connecting steel plates 5 are welded to the side wall of the flange disc 2, and the two connecting steel plates 5 are symmetrically distributed along the radial direction of the flange disc 2. The purpose is to make the diameter of the flange disc 2 plus the length of the two connecting steel plates 5 equal to the outer diameter of the steel pipe 1. The two long strip steel plates 3 are respectively welded between the top edges and the bottom edges of two steel pipe arch rib segments, so as to preliminarily position the adjacent two steel pipes 1 and limit the space between the two steel pipes 1, which is beneficial for the flange disc 2 and the two connecting steel plates 5 to be stably located between the adjacent two steel pipes 1, and can quickly make the flange orthogonal to the axis of the steel pipe 1.

[0035] A mark 4 is engraved at the welding joint of the long strip steel plate 3 and the connecting steel plate 5;

[0036] Specifically, in order to achieve the purpose of quickly and accurately welding the connecting steel plate 5 at the specified position on the inner wall of the long strip steel plate 3, the constructor can measure the welding points on the long strip steel plate 3 in advance and engrave marks 4 at the welding points.

[0037] Six stiffening rib plates 6 are welded to the edges of both surfaces of the flange disc 2, and the ends of the stiffening rib plates 6 are welded to the inner walls of the adjacent steel pipes 1;

[0038] Specifically, the use of multiple stiffening rib plates 6 fixes the flange to the inner wall of the steel pipe 1, achieving the purpose of stable connection.

[0039] A method for precisely controlling the positioning of the flange of a steel pipe arch rib segment. This method uses a flange positioning structure, which is used for positioning at the steel pipe connection of two adjacent steel pipe arch rib segments, including: a flange, a long strip steel plate, and a connecting steel plate. The flange includes a flange disc. There are two connecting steel plates, which are symmetrically distributed along the radial direction of the flange disc and welded to the side wall of the flange disc. There are two long strip steel plates, which are respectively welded to the outer ends of the two connecting steel plates, and the method includes the following steps:

[0040] S1: Prepare several steel pipes 1, flanges, long strip steel plates 3, and connecting steel plates 5;

[0041] S2: Precisely measure the center coordinates of the adjacent ports of two adjacent steel pipes 1, the center coordinates of the flange disc 2, and the top edge coordinates and bottom edge coordinates of the flange disc 2 corresponding to the steel pipe 1;

[0042] S3: Weld a long strip steel plate 3 between the top edge and the bottom edge of two adjacent steel pipes 1 respectively;

[0043] S4: Take two connecting steel plates 5 and symmetrically distribute them along the radial direction of the flange disc 2 and weld them to the side wall of the flange disc 2. Then place the flange between two adjacent steel pipes 1 and two long strip steel plates 3, and then weld the two connecting steel plates 5 to the inner walls of the two long strip steel plates 3 respectively, thereby completing the precise positioning of the flange.

[0044] In this embodiment, as Figure 1-2 shown, by precisely measuring the center coordinates of the adjacent ports of two adjacent steel pipes 1, the center coordinates of the flange disc 2 can be obtained. By measuring the top edge coordinates and bottom edge coordinates of the flange disc 2 corresponding to the steel pipe 1, the specific positions where the long strip steel plates 3 are welded between the outer walls of the two adjacent steel pipes 1 can be determined, and at the same time, the two adjacent steel pipes 1 can be positioned. Implementing S3 on the basis of S2 is beneficial to the subsequent positioning of the flange disc 2 within the space enclosed by the two long strip steel plates 3 and the two adjacent steel pipes 1, and further can quickly achieve the purpose of making the flange orthogonal to the axis of the steel pipe 1. In S4, the two connecting steel plates 5 are respectively welded to the inner walls of the two long strip steel plates 3, which is convenient for precisely positioning the flange disc 2.

[0045] In S3, the following steps are further included:

[0046] S31: Use a cutter to engrave a mark 4 on the inner wall of the long strip steel plate 3, and make the marks 4 on the two long strip steel plates 3 respectively precisely align with the top edge coordinates and bottom edge coordinates of the steel pipe 1, and the mark 4 is located at the center of the two adjacent steel pipes 1.

[0047] In this embodiment, making marks 4 on the inner walls of the long strip steel plates 3 is convenient for the two long strip steel plates 3 to respectively precisely align with the top edge coordinates and bottom edge coordinates of the steel pipe 1.

[0048] The two connecting steel plates 5 are respectively aligned with the two markings 4.

[0049] In this embodiment, in order to assist the flange disc 2 and the two connecting steel plates 5 to be accurately located at the marking 4 in S4, the marking 4 is located at the center of two adjacent steel pipes 1, so that the flange disc 2 is accurately located at the middle position between two adjacent steel pipes 1.

[0050] In S4, the following steps are further included:

[0051] S41: After the flange disc is accurately positioned, prepare several stiffening rib plates 6. Weld six stiffening rib plates 6 at the edges of both surfaces of the flange disc 2, and then weld the ends of the stiffening rib plates 6 to the inner walls of the adjacent steel pipes 1 to fix the flange disc 2 to the steel pipes 1;

[0052] S42: Cut off the long strip steel plate 3 and the connecting steel plate 5, and the welding construction of the steel pipe 1 and the flange is completed. By analogy, the construction of all the flanges of the steel pipe arch rib can be completed.

[0053] In this embodiment, welding the stiffening rib plates 6 between the flange disc 2 and the steel pipe 1 is to firmly connect the flange disc 2 and the steel pipe 1, thereby achieving the firm connection of two adjacent steel pipe arch rib segments. Cutting off the long strip steel plate 3 and the connecting steel plate 5 is to make the surface of the steel pipe arch rib segment flat and beautiful.

[0054] According to the center coordinates of the adjacent ports of the two steel pipes 1, the calculation formula for the center coordinates of the flange disc 2 is:

[0055]

[0056] where, (X A , Y A ), (X B , Y B ) respectively represent the center coordinates of the adjacent ports of the two steel pipes 1, and (X C , Y C ) represents the center coordinates of the flange disc 2.

[0057] It should be noted that in actual situations, the flange disc 2 is located at the middle position between two adjacent steel pipes 1. As Figure 1 shown, the center coordinates of the adjacent ports of the two steel pipes 1 are set as A and B, the center coordinates of the flange disc 2 are set as C, and the top edge coordinates and bottom edge coordinates of the steel pipe 1 are C1 and C2 respectively. Given the center coordinates of the adjacent ports of the two steel pipes 1, the center coordinates of the flange disc 2 can be obtained through the above calculation formula.

[0058] According to the center coordinates of the flange disc 2, the calculation formula for the top edge coordinates and bottom edge coordinates of the flange disc 2 corresponding to the steel pipe 1 is:

[0059]

[0060] Among them, (X C1 , Y C1 ), (X C2 , Y C2 ) respectively represent the top-edge coordinates and bottom-edge coordinates of the flange disk 2 corresponding to the steel pipe 1. D represents the outer diameter of the steel pipe 1, and α represents the horizontal inclination angle from the center coordinate of the flange disk 2 to the top edge or bottom edge of the steel pipe 1.

[0061] In this embodiment, given the center coordinates (X C , Y C ) of the flange disk 2, the outer diameter D of the steel pipe 1, and the horizontal inclination angle α from the center coordinate of the flange disk 2 to the top edge or bottom edge of the steel pipe 1, the top-edge coordinates and bottom-edge coordinates of the flange disk 2 corresponding to the steel pipe 1 can be obtained through the above calculation formula.

[0062] In summary, by measuring the center coordinates of the pipe orifices of two adjacent steel pipes 1, calculating the center coordinates of the flange disk 2 and the top-edge coordinates and bottom-edge coordinates of the flange disk 2 corresponding to the steel pipe 1, and then through the use of the long steel plate with the mark 4 and the connecting steel plate 5, the precise positioning of the flange is achieved by using these coordinates, ensuring the orthogonal arrangement of the flange and the axis of its steel pipe. Even if there are manufacturing deviations in the pipe orifice cross-section of the steel pipe 1, it will not affect the position of the flange disk 2, and it is beneficial to accurately weld the stiffening rib plate 6 between the steel pipe 1 and the flange disk 2 in the later stage.

Claims

1. A method for precisely controlling the positioning of the flange of the steel pipe arch rib segment, which uses a flange positioning structure for positioning at the connection of the steel pipes (1) of two adjacent steel pipe arch rib segments, and includes: A flange, a long strip steel plate (3) and a connecting steel plate (5), the flange includes a flange disc (2), there are two connecting steel plates (5) which are symmetrically distributed along the radial direction of the flange disc (2) and welded to the side wall of the flange disc (2), there are two long strip steel plates (3) which are respectively welded to the outer ends of the two connecting steel plates (5), and it is characterized in that it includes the following steps: S1: Prepare the steel pipe (1), flange, long strip steel plate (3) and connecting steel plate (5) as described above; S2: Accurately measure the central coordinates of the adjacent ports of the two adjacent steel pipes (1), the central coordinates of the flange disc (2), and the top edge coordinates and bottom edge coordinates of the flange disc (2) corresponding to the steel pipe (1); S3: Weld a long strip steel plate (3) between the top edge and the bottom edge of each of the two adjacent steel pipes (1); S4: Take two connecting steel plates (5) and weld them symmetrically along the radial direction of the flange disc (2) to the side wall of the flange disc (2), then place the flange between the two adjacent steel pipes (1) and the two long strip steel plates (3), and then weld the two connecting steel plates (5) to the inner walls of the two long strip steel plates (3) respectively, thereby completing the precise positioning of the flange.

2. A method for precisely controlling the positioning of the flange of the steel pipe arch rib segment according to claim 1, characterized in that, Two long strip steel plates (3) are respectively welded between the top edge and the bottom edge of the two steel pipe arch rib segments, and a mark (4) is engraved at the welding joint of the long strip steel plate (3) and the connecting steel plate (5).

3. A method for accurately controlling the positioning of the flange of the steel pipe arch rib segment according to claim 1, characterized in that, The two adjacent steel pipes (1) are flange-connected.

4. A method for accurately controlling the positioning of the flange of the steel pipe arch rib segment according to claim 1, characterized in that Six stiffening rib plates (6) are welded to the edges of both surfaces of the flange disc (2), and the ends of the stiffening rib plates (6) are welded to the inner walls of the adjacent steel pipes (1).

5. A method for precisely controlling the positioning of the flange of the steel pipe arch rib segment according to claim 1, characterized in that, According to the central coordinates of the adjacent ports of the two steel pipes (1), the calculation formula for the central coordinates of the flange disc (2) is: Among them, (X A , Y A ), (X B , Y B ) respectively represent the central coordinates of the adjacent ports of the two steel pipes (1), and (X C , Y C ) represents the central coordinate of the flange disc (2).

6. A method for precisely controlling the positioning of the flange of the steel pipe arch rib segment according to claim 5, characterized in that, According to the central coordinates of the flange disc (2), the calculation formulas for the top edge coordinates and bottom edge coordinates of the flange disc (2) corresponding to the steel pipe (1) are: Among them, (X C1 , Y C1 ), (X C2 , Y C2 ) respectively represent the top edge coordinates and bottom edge coordinates of the flange disc (2) corresponding to the steel pipe (1), D represents the outer diameter of the steel pipe (1), and α represents the horizontal inclination angle from the center coordinate of the flange disc (2) to the top edge or bottom edge of the steel pipe (1).

7. A method for accurately controlling the positioning of the flange of the steel pipe arch rib segment according to claim 1, characterized in that, In S3, the following steps are further included: S31: Use a cutter to engrave a mark (4) on the inner wall of the long strip steel plate (3), and make the marks (4) on the two long strip steel plates (3) accurately align with the top edge coordinates and bottom edge coordinates of the steel pipe (1) respectively, and the mark (4) is located at the center of the two adjacent steel pipes (1).

8. A method for precisely controlling the positioning of the flange of the steel pipe arch rib segment according to claim 7, characterized in that, The two connecting steel plates (5) are respectively aligned with the two marks (4).

9. A method for precisely controlling the positioning of the flange of the steel pipe arch rib segment according to claim 1, characterized in that, In S4, the following steps are further included: S41: After the precise positioning of the flange disc, prepare several stiffening rib plates (6), weld six stiffening rib plates (6) to the edges of both surfaces of the flange disc (2), and then weld the ends of the stiffening rib plates (6) to the inner walls of the adjacent steel pipes (1) to fix the flange disc (2) to the steel pipe (1); S42: Cut off the long strip steel plate (3) and the connecting steel plate (5), and then the welding construction of the steel pipe (1) and the flange is completed. By analogy, the construction of all the flanges of the steel pipe arch rib can be completed.

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