Machining method and mounting method for flange connecting structure in steel pipe arch

Abstract

The invention relates to a processing method and a mounting method of a steel pipe arch inner flange connecting structure. The processing method comprises the following steps: designing a processing process quantity in the thickness direction of an inner flange plate and the diameter of an inner hole of the inner flange plate; drilling a positioning hole in the first inner flange plate and a part of positioning holes in the second inner flange plate; the first inner flange plate and the second inner flange plate are fixed; carrying out pairing machining on the binding surface; the first inner flange plate and the second inner flange plate which are machined serve as a combined piece, rib plate assembling is conducted on the first inner flange plate, and a lining pipe is installed; and after the combined piece is installed on the steel pipe arch rib section, rib plate assembling is conducted on the second inner flange plate. In the embodiment of the invention, a close fitting pairing machining method is adopted, so that the close fitting performance of the inner flange is greatly improved; after the combined piece is installed on a steel pipe arch rib section, rib plate assembling is conducted on the second inner flange plate, and the assembling precision of the arch rib of the steel pipe arch is greatly improved; compared with the traditional technology, the processing technology does not need additional investment, and is simple and easy to operate.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of flange connection structures, and in particular, to a processing method and an installation method for an internal flange connection structure of a steel pipe arch. Background Art

[0002] Currently, steel pipe arch bridges are becoming increasingly mature in design and are widely adopted for their beautiful linear appearance, graceful shape, and strong load-bearing capacity. Large-span steel pipe arches need to be manufactured into different arch rib segments in the factory, and an internal flange structure is used for the connection between the arch ribs. Generally, the internal flange connection structure of a steel pipe arch includes: two flange plates, which are connected by a lining pipe between them, and multiple rib plates are provided on each flange plate, and multiple positioning holes are formed on each flange plate.

[0003] Currently, the internal flange structures manufactured by traditional technical processes have the industry problem of insufficient close contact during connection, which affects the assembly accuracy of the arch rib segments of steel pipe arch bridges. Therefore, the existing technology cannot meet the requirements for controlling the processing accuracy of the internal flange structure, and new technologies need to be developed.

[0004] Therefore, it is necessary to improve one or more problems existing in the above-mentioned related technical solutions.

[0005] It should be noted that this part is intended to provide background or context for the technical solutions of the present disclosure stated in the claims. The descriptions herein are not admitted to be prior art because they are included in this part. Summary of the Invention

[0006] The purpose of the embodiments of the present disclosure is to provide a processing method and an installation method for an internal flange connection structure of a steel pipe arch, so as to at least overcome one or more problems caused by the limitations and defects of the related technology to a certain extent.

[0007] The embodiments of the present disclosure first provide a processing method for an internal flange connection structure of a steel pipe arch. The internal flange connection structure includes: a first internal flange plate, a second internal flange plate, a lining pipe, and multiple rib plates. Multiple rib plates and multiple positioning holes are provided on both the first internal flange plate and the second internal flange plate. The lining pipe is inserted into the inner holes of the first internal flange plate and the second internal flange plate, and the first internal flange plate and the second internal flange plate are connected by the lining pipe. The processing method includes:

[0008] Design and process the machining allowances in the thickness direction of the internal flange plate and the inner hole diameter of the internal flange plate.

[0009] Drill all the positioning holes on the first internal flange plate and part of the positioning holes on the second internal flange plate.

[0010] Using the first inner flange as a template, fix the first inner flange and the second inner flange with a fixture, and drill the remaining positioning holes on the second inner flange;

[0011] Perform mating machining on the mating surfaces of the first inner flange and the second inner flange;

[0012] Take the machined first inner flange and second inner flange as an assembled part, assemble the rib plates on the first inner flange, and install the inner liner pipe between the first inner flange and the second inner flange;

[0013] After installing the assembled part onto the steel pipe arch rib segment, assemble the rib plates on the second inner flange.

[0014] In an embodiment of the present disclosure, the machining allowance in the thickness direction of the inner flange is 3 - 5 mm, and the designed assembly allowance for the inner hole diameter of the inner flange is 5 - 7 mm.

[0015] In an embodiment of the present disclosure, when drilling the positioning holes on the second inner flange, first drill the positioning holes located on the center line of the second inner flange.

[0016] In an embodiment of the present disclosure, when performing mating machining on the mating surfaces, detect the degree of fit.

[0017] In an embodiment of the present disclosure, the range of the degree of fit is: less than 0.2 mm.

[0018] In an embodiment of the present disclosure, design the machining allowance for the rib plates.

[0019] In an embodiment of the present disclosure, the machining allowance for the rib plates is 2 - 4 mm.

[0020] In an embodiment of the present disclosure, the shape of the rib plates is polygonal.

[0021] The present disclosure secondly provides a method for installing a steel pipe arch inner flange connection structure, installing the inner flange connection structure as described in any one of the above, and the installation method includes:

[0022] Assemble the assembled part composed of the first inner flange and the second inner flange to the end of the first arch rib segment of the steel pipe;

[0023] Use the assembled part to assemble the second arch rib segment and assemble the rib plates of the second inner flange;

[0024] Remove the fixture on the assembled part to complete the installation of the inner flange connection structure.

[0025] In an embodiment of the present disclosure, after using the assembled part to assemble the second arch rib segment, detect the qualified degree of the designed linearity, and after passing the detection, assemble the rib plates of the second inner flange.

[0026] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0027] For the processing method and installation method of the inner flange connection structure in the steel pipe arch of the embodiments of the present disclosure, when processing the inner flange connection structure of the present application, a close-fitting matching machining method is adopted, which greatly improves the close-fitting performance of the inner flange; the two inner flange plates are installed first as a combined part, reducing the difficulty of on-site construction; after installing the combined part to the steel pipe arch rib segment, the rib plates are assembled on the second inner flange plate, greatly improving the assembly accuracy of the steel pipe arch rib; the processing technology of the present application does not require additional investment compared with the traditional technology and is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0029] Figure 1 Schematic diagram showing the structure of a single inner flange in an exemplary embodiment of the present disclosure;

[0030] Figure 2 Schematic diagram showing the structure of the inner flange connection structure in an exemplary embodiment of the present disclosure;

[0031] Figure 3 Schematic diagram showing the steps of the processing method of the inner flange connection structure in the steel pipe arch in an exemplary embodiment of the present disclosure;

[0032] Figure 4 Schematic diagram showing the processing process dimensions of the inner flange plate in an exemplary embodiment of the present disclosure;

[0033] Figure 5 Schematic diagram showing the center line of the inner flange plate in an exemplary embodiment of the present disclosure;

[0034] Figure 6 Schematic diagram showing the structure of the fixed connection of two inner flange plates in an exemplary embodiment of the present disclosure;

[0035] Figure 7 Schematic diagram showing the structure of the combined part in an exemplary embodiment of the present disclosure;

[0036] Figure 8 Schematic diagram showing the structure after the combined part is installed to the first arch rib segment in an exemplary embodiment of the present disclosure;

[0037] Figure 9Shows the structural schematic diagram after the installation of two arch rib segments in an exemplary embodiment of the present disclosure;

[0038] Figure 10 Shows the step diagram of the installation method of the internal flange connection structure in the steel pipe arch in an exemplary embodiment of the present disclosure.

[0039] Reference numerals:

[0040] 10. First arch rib segment; 20. Second arch rib segment; 30. Punching fixture; 40. Fastening fixture;

[0041] 100. First internal flange plate; 200. Second internal flange plate; 300. Lining pipe; 400. Rib plate; 500. Positioning hole. Detailed implementation manners

[0042] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0043] In addition, the drawings are only schematic illustrations of the embodiments of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0044] First, the internal flange connection structure of the present application will be described. As Figure 1 and Figure 2 shown, the internal flange connection structure includes: a first internal flange plate 100, a second internal flange plate 200, a lining pipe 300, and a plurality of rib plates 400. A plurality of the rib plates 400 and a plurality of positioning holes 500 are provided on both the first internal flange plate 100 and the second internal flange plate 200. The lining pipe 300 is inserted through the inner holes of the first internal flange plate 100 and the second internal flange plate 200, and the first internal flange plate 100 and the second internal flange plate 200 are connected by the lining pipe 300.

[0045] In this example embodiment, a processing method for the internal flange connection structure of a steel pipe arch is provided. Please refer to Figure 3 , the processing method includes:

[0046] S101, designing and processing process quantities in the thickness direction of the internal flange plate and the inner hole diameter of the internal flange plate;

[0047] S102, Drill all the positioning holes 500 on the first inner flange 100(A) and some of the positioning holes 500 on the second inner flange 200(A’).

[0048] S103, Using the first inner flange 100 as a template, fix the first inner flange 100 and the second inner flange 200 with a fixture, and drill the remaining positioning holes 500 on the second inner flange 200.

[0049] S104, Conduct paired machining on the mating surfaces of the first inner flange 100 and the second inner flange 200.

[0050] S105, Take the machined first inner flange 100 and the second inner flange 200 as an assembled part, assemble the rib plate 400 on the first inner flange 100, and install the inner liner pipe 300 between the first inner flange 100 and the second inner flange 200.

[0051] S106, After installing the assembled part onto the steel pipe arch rib segment, assemble the rib plate 400 on the second inner flange 200.

[0052] In this embodiment, when processing the inner flange connection structure of the present application, a close-fitting paired machining method is adopted, which greatly improves the close-fitting performance of the inner flange; installing the two inner flanges as an assembled part during factory manufacturing reduces the difficulty of on-site construction; after installing the assembled part onto the steel pipe arch rib segment, assembling the rib plate 400 on the second inner flange 200 greatly improves the assembly accuracy of the steel pipe arch rib; the processing technology of the present application does not require additional investment compared with the traditional technology and is simple and easy to operate.

[0053] It should be noted that the inner flange connection structure and the processing and installation methods of the present application are applicable to the connection of long-span half-through steel pipe arches.

[0054] Next, the specific situations involved in each step of the above processing method will be described.

[0055] Please refer to Figure 4 , in S101, design the machining allowance in the thickness direction of the inner flange and the inner diameter of the inner flange hole. Designing the machining allowance in the thickness direction of the inner flange helps subsequent machining of the mating surface of the inner flange, and designing the assembly allowance in the inner diameter of the inner flange hole can ensure the tolerance fit of the subsequent installed inner liner pipe 300. Specifically, the machining allowance in the thickness direction of the inner flange is 3 - 5 mm, and the machining allowance designed for the inner diameter of the inner flange hole is 5 - 7 mm. Figure 4 In "", "set" represents the designed amount, "+6" represents the inner diameter assembly fit allowance, and "+4" represents the machining allowance designed in the thickness direction of the inner flange.

[0056] In S102, first draw the center lines of the two inner flange plates, i.e., Figure 5 the cross lines in. First, drill all the positioning holes 500 on the first inner flange plate 100. The number of the positioning holes 500 can be 8, which are evenly distributed on the inner flange plate. Then, drill some of the positioning holes 500 on the second inner flange plate 200, that is, process the positioning holes 500 on the center line of the second inner flange plate 200.

[0057] In S103, when fixing the two inner flange plates with a fixture, a punch fixture 30 can be used to pass through the positioning holes 500 of the two inner flange plates for fixation, and then drill the remaining positioning holes 500 on the second inner flange plate 200.

[0058] In S104, when performing paired machining on the mating surfaces of the two inner flange plates, first machine the mating surface of the first inner flange plate 100, and then machine the mating surface of the second inner flange plate 200. During the machining process, use a feeler gauge to detect the mating degree of the mating surfaces of the two inner flange plates. The gap between the inner flange plates is below 0.2 mm. In addition, the surface roughness can be controlled between 10 and 15 μm, for example, it can be 12.5 μm.

[0059] In S105, please refer to Figure 6 and Figure 7 , use a fastening fixture 40 to fix and tighten the machined first inner flange plate 100 and the second inner flange plate 200 to obtain an assembled part. Then assemble the rib plate 400 on the first inner flange plate 100, and then install the inner lining pipe 300 onto the first inner flange plate 100. The inner flange connection structure is designed to be inserted into the arch rib segment. To facilitate the smooth assembly of the assembled part to the arch rib segment of the arch bridge, a reasonable process allowance is designed for the rib plate 400. The machining process allowance of the rib plate 400 is 2 to 4 mm. In addition, the shape of the rib plate 400 is a polygon. Figure 7 In, "set" is the designed amount, and "-2" is the machining process allowance.

[0060] In S106, please refer to Figure 8 and Figure 9 , after installing the assembled part to the steel pipe arch rib segment, assemble the rib plate 400 on the second inner flange plate 200. The specific process is as follows: first assemble the assembled part and the first arch rib segment 10 in the processing factory, then assemble the first arch rib segment 10 onto the assembled part, and assemble the rib plate 400 on the second inner flange plate 200.

[0061] Secondly, the present application provides an installation method for the inner flange connection structure of the steel pipe arch. For installing the inner flange connection structure described in any of the above embodiments, please refer to Figure 10 , the installation method includes:

[0062] S201. Assemble the assembly composed of the first inner flange 100 and the second inner flange 200 to the end of the steel pipe first arch rib segment 10;

[0063] S202. Use the said assembly to assemble the second arch rib segment 20 and assemble the rib plates 400 of the second inner flange 200;

[0064] S203. Remove the fixture on the said assembly to complete the installation of the inner flange connection structure.

[0065] After using the said assembly to assemble the second arch rib segment 20, detect the compliance of the designed linearity. After passing the detection, assemble the rib plates 400 of the second inner flange 200.

[0066] In this embodiment, innovative technology is adopted to assemble the first inner flange 100 and the second inner flange 200 as an assembly to the arch rib segment, solving the following problems: a) The technical problem that the inner flange structure has many parts and is difficult to assemble; b) The inner flange structure is processed as an assembly, and the inner flange tightness is reliable; c) After the inner flange structure assembly is processed and assembled to the arch rib segment, the on-site assembly workload is reduced and the construction efficiency is improved. In addition, the rib plates 400 of the second inner flange 200 are assembled after the two arch rib segments are adjusted to the design requirements, ensuring the accuracy of the arch rib segment linearity and reducing the construction operation difficulty.

[0067] It should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. in the above description is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present disclosure.

[0068] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless otherwise specifically defined.

[0069] In the embodiments of the present disclosure, unless otherwise clearly defined or limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0070] In the embodiments of the present disclosure, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0071] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0072] After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include the known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. Processing method for internal flange connection structure of steel pipe arch, the internal flange connection structure comprising: The first inner flange, the second inner flange, the inner lining pipe and a plurality of rib plates, wherein a plurality of the rib plates and a plurality of positioning holes are provided on both the first inner flange and the second inner flange, the inner lining pipe is sleeved on the inner holes of the first inner flange and the second inner flange, and the first inner flange and the second inner flange are connected through the inner lining pipe. It is characterized in that the processing method includes: Design and process the process allowance in the thickness direction of the inner flange and the inner hole diameter of the inner flange. Drill all the positioning holes on the first inner flange and part of the positioning holes on the second inner flange. Take the first inner flange as a template, fix the first inner flange and the second inner flange with a fixture, and drill the remaining positioning holes on the second inner flange. Perform mating machining on the mating surfaces of the first inner flange and the second inner flange. Take the machined first inner flange and the second inner flange as a combined part, assemble the rib plates on the first inner flange, and install the inner lining pipe between the first inner flange and the second inner flange. After installing the combined part to the steel pipe arch rib section, assemble the rib plates on the second inner flange.

2. The processing method of the flange connection structure inside the steel pipe arch according to claim 1, characterized in that The process allowance in the thickness direction of the inner flange is 3 - 5 mm, and the designed assembly process allowance for the inner hole diameter of the inner flange is 5 - 7 mm.

3. The processing method of the flange connection structure inside the steel pipe arch according to claim 1, characterized in that, When drilling the positioning holes on the second inner flange, first drill the positioning holes located on the center line of the second inner flange.

4. The processing method of the internal flange connection structure of the steel pipe arch according to claim 1, characterized in that When performing mating machining on the mating surfaces, detect the mating degree.

5. The processing method of the flange connection structure inside the steel pipe arch according to claim 4, characterized in that, The range of the mating degree is: less than 0.2 mm.

6. The processing method of the flange connection structure inside the steel pipe arch according to claim 1, characterized in that, Design and process the process allowance for the rib plates.

7. The processing method of the flange connection structure inside the steel pipe arch according to claim 6, characterized in that, The process allowance for the rib plates is 2 - 4 mm.

8. The processing method of the flange connection structure inside the steel pipe arch according to claim 1, characterized in that The shape of the rib plates is polygonal.

9. Installation method of flange connection structure inside steel pipe arch, characterized in that, Install the inner flange connection structure according to any one of claims 1 - 8. The installation method includes: Assemble the combined part composed of the first inner flange and the second inner flange to the end of the first arch rib section of the steel pipe. Use the combined part to assemble the second arch rib section and assemble the rib plates of the second inner flange. Remove the fixture on the combined part to complete the installation of the inner flange connection structure.

10. The installation method of the flange connection structure inside the steel pipe arch according to claim 9, characterized in that, After using the combined part to assemble the second arch rib section, detect the qualified degree of the designed linearity. After passing the detection, assemble the rib plates of the second inner flange.

Images