Variable-section steel pipe and manufacturing method

Abstract

The present invention discloses a variable-section steel pipe and a manufacturing method. The variable-section steel pipe includes a tubular structure and a reinforcement node. The tubular structure gradually increases in cross-sectional size along a preset direction. The tubular structure is provided with an inner cavity extending along the preset direction. The reinforcement node is provided in the inner cavity. The reinforcement node includes a reinforcement circular pipe, a first reinforcement inner ring plate and a second reinforcement inner ring plate. The reinforcement circular pipe is passed through the first reinforcement inner ring plate and the second reinforcement inner ring plate. The outer wall of the first reinforcement inner ring plate and the outer wall of the second reinforcement inner ring plate are respectively welded to the cavity wall of the inner cavity. A worker can weld the first reinforcement inner ring plate and the second reinforcement inner ring plate from both ends of the inner cavity, thereby preventing the first reinforcement inner ring plate and the second reinforcement inner ring plate from affecting each other's welding, ensuring that the worker has sufficient operating space during welding, and reducing the difficulty of welding between the reinforcement node and the tubular structure.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and in particular to a variable-section steel pipe and a manufacturing method thereof. Background Art

[0002] In steel structure buildings, variable-section steel pipes are often required to support the superstructure. Accordingly, the strength requirements for variable-section steel pipes are relatively high. Therefore, in order to ensure the strength of the variable-section steel pipes, it is often necessary to weld reinforcement nodes in the cavity of the circular pipe. In the related art, the top of the circular pipe is provided with a plurality of longitudinally extending installation grooves. The reinforcement nodes include a top plate and a plurality of reinforcing plates welded to the top plate. When installing the reinforcement nodes, the reinforcing plates need to be inserted into the installation grooves and welded into the installation grooves. Due to the large number of reinforcement plates, when the staff welds a certain reinforcement plate to the inner wall of the circular pipe, the adjacent reinforcement plates will occupy the staff's operating space, leaving the staff with insufficient operating space for welding operations, which increases the difficulty of welding. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. In a first aspect, the present invention provides a variable-section steel pipe that has low welding difficulty during manufacture. In a second aspect, the present invention provides a method for manufacturing the variable-section steel pipe provided in the first aspect.

[0004] According to the first aspect of the present invention, the variable-section steel pipe provided in the embodiment includes a tubular structure and a reinforcement node; the cross-sectional size of the tubular structure gradually increases along a preset direction, and an inner cavity extending along the preset direction is provided in the tubular structure; the reinforcement node is provided in the inner cavity, and the reinforcement node includes a reinforcing circular tube, a first reinforcing inner ring plate and a second reinforcing inner ring plate, the reinforcing circular tube is passed through the first reinforcing inner ring plate and the second reinforcing inner ring plate, and the outer wall of the first reinforcing inner ring plate and the outer wall of the second reinforcing inner ring plate are respectively welded to the cavity wall of the inner cavity.

[0005] The variable-section steel pipe described in the embodiment of the first aspect of the present invention has at least the following beneficial effects: the reinforcing circular tube is passed through the first reinforcing inner ring plate and the second reinforcing inner ring plate, and then the outer wall of the first reinforcing inner ring plate and the outer wall of the second reinforcing inner ring plate are respectively welded to the wall of the inner cavity, so as to realize welding between the reinforcement node and the tubular structure. The staff can weld the first reinforcing inner ring plate and the second reinforcing inner ring plate from both ends of the inner cavity respectively, avoiding the first reinforcing inner ring plate and the second reinforcing inner ring plate affecting each other's welding, ensuring that the staff has sufficient operating space when welding, and reducing the difficulty of welding between the reinforcement node and the tubular structure; at the same time, in the present application, when the staff welds the reinforcement node and the tubular structure, they only need to weld the gap between the tubular structure and the first reinforcing inner ring plate and the second reinforcing inner ring plate respectively. The number of welds between the reinforcement node and the tubular structure is small, which reduces the work intensity of the staff.

[0006] According to the variable-section steel pipe described in the embodiment of the first aspect of the present invention, the reinforcement node also includes several stiffening plate groups, the stiffening plate groups include multiple stiffening plates distributed along the circumference of the reinforced circular tube, and at least one stiffening plate group is provided between the first reinforcing inner ring plate and the second reinforcing inner ring plate.

[0007] According to the variable-section steel pipe described in the embodiment of the first aspect of the present invention, the tubular structure includes two semicircular tube members and two triangular plate members, wherein the two side edges of one triangular plate member are respectively connected to the first side edges of the two semicircular tube members, and the two side edges of the other triangular plate member are respectively connected to the second side edges of the two semicircular tube members.

[0008] The variable-section steel pipe according to the embodiment of the first aspect of the present invention further includes two cover plates. Two openings connected to the inner cavity are formed at both ends of the tubular structure. The two cover plates are respectively arranged at the two openings and respectively connected to the edges of the two openings.

[0009] According to a second aspect of the present invention, a method for manufacturing a variable-section steel pipe is provided, comprising:

[0010] Processing a tubular structure;

[0011] Welding the first reinforcing inner ring plate, the second reinforcing inner ring plate and a plurality of stiffening plate groups to the side walls of the reinforced circular tube to form reinforcement nodes;

[0012] Welding the first reinforcing inner ring plate and the second reinforcing inner ring plate to the cavity wall respectively, so as to weld the reinforcing node in the inner cavity of the tubular structure;

[0013] Cover plates are welded respectively at the two openings of the tubular structure.

[0014] The manufacturing method of the variable cross-section steel pipe described in the embodiment of the second aspect of the present invention has at least the following beneficial effects: first, a tubular structure is processed, and then the first reinforcing inner ring plate, the second reinforcing inner ring plate and a plurality of stiffening plate groups are welded to the side wall of the reinforcing circular tube to form a reinforcement node, and then the first reinforcing inner ring plate and the second reinforcing inner ring plate are respectively welded to the cavity wall of the inner cavity to weld the reinforcement node to the inner cavity of the tubular structure, and then the cover plates are respectively welded at the two openings of the tubular structure. By welding the first reinforcing inner ring plate and the second reinforcing inner ring plate to the cavity wall of the inner cavity respectively, the staff can weld the first reinforcing inner ring plate and the second reinforcing inner ring plate respectively from both ends of the inner cavity, and thus when the staff is working, the first reinforcing inner ring plate and the second reinforcing inner ring plate can be avoided from interfering with each other, so that the staff has sufficient operating space when welding, which reduces the difficulty of welding.

[0015] According to the method for manufacturing a variable-section steel pipe according to the second embodiment of the present invention, the tubular structure includes two semicircular pipes and two triangular plate members, and the tubular structure is processed, including:

[0016] Two semicircular tubes and two triangular plate parts are processed respectively;

[0017] The two semicircular pipe pieces are respectively welded to the two triangular plate pieces to form a tubular structure.

[0018] According to the method for manufacturing a variable-section steel pipe according to the second embodiment of the present invention, two semicircular pipe pieces and two triangular plate pieces are processed respectively, comprising:

[0019] Cutting the first plate along its center line to form a plurality of spaced cutting segments, wherein the connecting line of the plurality of cutting segments 501 forms a reserved cutting line;

[0020] The first plate is rolled into a tube by a plate rolling machine to form a cylinder, wherein the reserved cutting line is parallel to the central axis of the cylinder;

[0021] Cut the cylinder along the reserved cutting line to form two semicircular pipe parts;

[0022] Draw the outlines of two triangular plate pieces on the second plate piece;

[0023] The second plate is cut along the contour line to form two triangular plate pieces.

[0024] According to the method for manufacturing a variable-section steel pipe according to the second embodiment of the present invention, two semicircular pipes are welded to two triangular plates respectively, comprising:

[0025] Build a tire frame on the ground;

[0026] Hoist the two semicircular tubes and the two triangular plates onto the tire frame, respectively, so that the two ends of one triangular plate abut against the first ends of the two semicircular tubes, and the two ends of the other triangular plate abut against the second ends of the two semicircular tubes;

[0027] Spot welding is performed along the gap between the triangular plate and the semicircular pipe;

[0028] Welding is performed along the gap between the triangular plate member and the semicircular tube member to completely fill the gap between the triangular plate member and the semicircular tube member to form a tubular structure.

[0029] According to the method for manufacturing a variable-section steel pipe according to the second embodiment of the present invention, the multiple groups of stiffening plates include multiple first stiffening plates and multiple second stiffening plates, and the first reinforcing inner ring plate, the second reinforcing inner ring plate, and the multiple groups of stiffening plates are respectively welded to the side wall of the reinforced circular pipe, including:

[0030] Inserting the reinforcing circular tube into the first reinforcing inner ring plate, and welding the connection between the reinforcing circular tube and the first reinforcing inner ring plate;

[0031] Welding a plurality of first stiffening plates along the circumferential direction on the side wall of the reinforced circular tube, and welding the first stiffening plates to the adjacent ends of the first reinforced inner ring plate;

[0032] Insert the reinforcing circular tube into the second reinforcing inner ring plate, weld the connection between the reinforcing circular tube and the second reinforcing inner ring plate, and weld the adjacent ends of the first stiffening plate and the second reinforcing inner ring plate;

[0033] A plurality of second stiffening plates are welded on the side wall of the reinforced circular tube along the circumferential direction, and the second stiffening plates are welded to an end of the second reinforced inner ring plate away from the first stiffening plate.

[0034] According to the method for manufacturing a variable-section steel pipe according to an embodiment of the second aspect of the present invention, before manufacturing the variable-section steel pipe, the method further includes:

[0035] The variable-section steel pipe is 3D modeled using 3D software, and the dimensional parameters of each structure of the variable-section steel pipe are measured. The dimensional parameters are used for subsequent auxiliary manufacturing of the variable-section steel pipe.

[0036] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0038] Figure 1 This is a schematic structural diagram of a variable-section steel pipe according to an embodiment of the present invention;

[0039] Figure 2 for Figure 1 Exploded view of the variable cross-section steel pipe shown;

[0040] Figure 3 for Figure 1 A cross-sectional view of a variable-section steel pipe is shown;

[0041] Figure 4 for Figure 2 The structural diagram of the reinforcement node of the variable cross-section steel pipe shown in FIG.

[0042] Figure 5 This is a schematic structural diagram of a first plate member with a cutting section according to an embodiment of the present invention;

[0043] Figure 6 This is a schematic structural diagram of a cylinder according to an embodiment of the present invention;

[0044] Figure 7This is a flow chart of a method for manufacturing a variable-section steel pipe according to an embodiment of the present invention;

[0045] Figure 8 A flow chart of processing a tubular structure according to an embodiment of the present invention;

[0046] Figure 9 A flow chart showing the processing of two semicircular tubes and two triangular plate parts according to an embodiment of the present invention;

[0047] Figure 10 This is a flow chart of welding each semicircular pipe member to two triangular plate members according to one embodiment of the present invention;

[0048] Figure 11 The present invention is a flowchart of welding a first reinforcing inner ring plate, a second reinforcing inner ring plate and a plurality of stiffening plate groups to the side walls of a reinforcing circular tube according to an embodiment of the present invention.

[0049] Reference numerals:

[0050] Tubular structure 100; inner cavity 101; semicircular tube 110; triangular plate 120;

[0051] Reinforcement node 200; reinforcement tube 210; first reinforcement inner ring plate 220; second reinforcement inner ring plate 230; first stiffening plate 240; second stiffening plate 250;

[0052] Cover plate 300;

[0053] Tire frame 400;

[0054] First plate 500 ; cutting section 501 ; cylinder 510 . DETAILED DESCRIPTION

[0055] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0056] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0057] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0058] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0059] Reference below Figures 1 to 11 The variable-section steel pipe and the manufacturing method of the present invention are described in detail.

[0060] Reference Figure 1 and Figure 4 The variable-section steel pipe according to an embodiment of the present invention includes a tubular structure 100 and a reinforcement node 200.

[0061] The cross-sectional size of the tubular structure 100 gradually increases along a preset direction, and an inner cavity 101 extending along a preset direction is provided in the tubular structure 100; the reinforcement node 200 is provided in the inner cavity 101, and the reinforcement node 200 includes a reinforcement circular tube 210, a first reinforcement inner ring plate 220 and a second reinforcement inner ring plate 230, and the reinforcement circular tube 210 is passed through the first reinforcement inner ring plate 220 and the second reinforcement inner ring plate 230, and the outer wall of the first reinforcement inner ring plate 220 and the outer wall of the second reinforcement inner ring plate 230 are respectively welded to the cavity wall of the inner cavity 101.

[0062] For example, Figures 1 to 4As shown, the variable-section steel pipe includes a tubular structure 100 and a reinforcement node 200. An inner cavity 101 is provided in the tubular structure 100 and penetrates the tubular structure 100. The cross-sectional size of the tubular structure 100 gradually increases from the head to the tail. Correspondingly, the cross-sectional size of the inner cavity 101 gradually increases from the head to the tail. The reinforcement node 200 is installed in the inner cavity 101 and is located at the head of the tubular structure 100. The reinforcement node 200 includes a reinforcement circular tube 210, a first reinforcement inner ring plate 220 and a second reinforcement inner ring plate 221. The reinforcing inner ring plate 230 and the reinforcing circular tube 210 are respectively passed through the through holes of the first reinforcing inner ring plate 220 and the through holes of the second reinforcing inner ring plate 230, and the reinforcing circular tube 210 is respectively welded to the first reinforcing inner ring plate 220 and the second reinforcing inner ring plate 230, and the first reinforcing inner ring plate 220 and the second reinforcing inner ring plate 230 are respectively welded to the cavity wall of the inner cavity 101, and the first reinforcing inner ring plate 220 is close to the tail end of the tubular structure 100, and the second reinforcing inner ring plate 230 is close to the head end of the tubular structure 100. When the worker welds the reinforcement node 200 in the inner cavity 101, the reinforcement node 200 is placed in the inner cavity 101, and the worker can enter the inner cavity 101 from the head end of the tubular structure 100 to weld the second reinforcement inner ring plate 230 to the cavity wall of the inner cavity 101. The worker can enter the inner cavity 101 from the tail end of the tubular structure 100 to weld the first reinforcement inner ring plate 220 to the cavity wall of the inner cavity 101. Furthermore, when the worker performs the welding operation, the mutual influence between the first reinforcement inner ring plate 220 and the second reinforcement inner ring plate 230 is avoided, which ensures the worker's operating space during welding and reduces the difficulty of welding. At the same time, the worker only needs to weld the gaps between the first reinforcement inner ring plate 220 and the second reinforcement inner ring plate 230 and the cavity wall of the inner cavity 101, which reduces the number of welds and correspondingly reduces the worker's work intensity.

[0063] In some embodiments of the present invention, the reinforcement node 200 further includes a plurality of stiffening plate groups, the stiffening plate groups including a plurality of stiffening plates distributed along the circumference of the reinforcement tube 210, and a group of stiffening plate groups is provided between the first reinforcement inner ring plate 220 and the second reinforcement inner ring plate 230. For example, Figure 4As shown, the reinforcement node 200 may include a plurality of first stiffening plates 240 and a plurality of second stiffening plates 250. The first stiffening plates 240 and the second stiffening plates 250 may be distributed along the circumference of the reinforcement tube 210, and the first stiffening plates 240 and the second stiffening plates 250 may be welded to the side wall of the reinforcement tube 210; the first stiffening plate 240 may be located between the first reinforcement inner ring plate 220 and the second reinforcement inner ring plate 230, and one end of the first stiffening plate 240 is welded to the first reinforcement inner ring plate 220, and the other end of the first stiffening plate 240 is welded to the second reinforcement inner ring plate 230; the second stiffening plate 250 may be located on a side of the second reinforcement inner ring plate 230 away from the first stiffening plate 240, and the second stiffening plate 250 is welded to an end of the second reinforcement inner ring plate 230 away from the first stiffening plate 240. By providing the first stiffening plate 240 and the second stiffening plate 250 , the strength of the reinforcement node 200 can be improved, thereby improving the strength of the variable-cross-section tubular structure 100 .

[0064] In some embodiments of the present invention, the tubular structure 100 includes two semicircular tubes 110 and two triangular plate members 120, wherein the two sides of one triangular plate member 120 are respectively connected to the first sides of the two semicircular tubes 110, and the two sides of the other triangular plate member 120 are respectively connected to the second sides of the two semicircular tubes 110. For example, Figures 1 to 3 As shown, the cross-sections of the two triangular plates 120 can both be isosceles triangles, thereby making the front end surface of the tubular structure 100 circular and the rear end surface of the tubular structure 100 elliptical. When the variable-section steel pipe is used in a building, the rear end of the tubular structure 100 abuts against the support surface. Compared with the traditional circular rear end surface, the rear end surface of the variable-section steel pipe of the present application maintains the same maximum diameter, and thus occupies less space.

[0065] In some embodiments of the present invention, the variable-section steel pipe further includes two cover plates 300. Two openings communicating with the inner cavity 101 are formed at both ends of the tubular structure 100. The two cover plates 300 are respectively disposed at the openings and connected to the edges of the two openings. Figures 1 to 3 As shown, openings communicating with the inner cavity 101 are formed at the head and tail ends of the tubular structure 100. Cover plates 300 are provided at the openings and welded to the edges of the openings to completely seal them. The installation of cover plates 300 completely seals the inner cavity 101 of the tubular structure 100, thereby protecting the reinforcement nodes 200 therein and extending the service life of the variable-section steel pipe.

[0066] Reference Figure 7 The method for manufacturing a variable-section steel pipe according to an embodiment of the present invention includes but is not limited to the following steps:

[0067] Step S100: processing a tubular structure 100;

[0068] Step S200: Welding the first reinforcing inner ring plate 220, the second reinforcing inner ring plate 230 and a plurality of stiffening plate groups to the side walls of the reinforcing circular tube 210 to form a reinforcing node 200;

[0069] Step S300: Welding the first reinforcing inner ring plate 220 and the second reinforcing inner ring plate 230 to the cavity wall of the inner cavity 101 respectively, so as to weld the reinforcing node 200 into the inner cavity 101 of the tubular structure 100;

[0070] Step S400 : welding the cover plates 300 at the two openings of the tubular structure 100 respectively.

[0071] It is understandable that by welding the first reinforcing inner ring plate 220 and the second reinforcing inner ring plate 230 to the cavity wall of the inner cavity 101, the staff can weld the first reinforcing inner ring plate 220 and the second reinforcing inner ring plate 230 from both ends of the inner cavity 101, thereby avoiding interference between the first reinforcing inner ring plate 220 and the second reinforcing inner ring plate 230 when the staff is working, ensuring that the staff has sufficient operating space when welding, and reducing the difficulty of welding. At the same time, the staff welds the gaps between the cavity wall of the inner cavity 101 and the first reinforcing inner ring plate 220 and the second reinforcing inner ring plate 230, respectively, reducing the number of welds and reducing the workload of the staff.

[0072] In some embodiments of the present invention, reference Figure 8 The tubular structure 100 includes two semicircular tubes 110 and two triangular plate members 120. Step S100 includes but is not limited to the following steps:

[0073] Step S110: processing two semicircular tubes 110 and two triangular plate members 120 respectively;

[0074] Step S120 : Welding the two semicircular tubes 110 and the two triangular plate members 120 to each other to form the tubular structure 100 .

[0075] It is understandable that the length of the tubular structure 100 can reach about 3.6m. It is difficult to manufacture the tubular structure 100 by casting, and the precision of the manufactured tubular structure 100 is difficult to meet the requirements; by splitting the tubular structure 100 into two semicircular tubes 110 and two triangular plates 120, the semicircular tubes 110 and the triangular plates 120 have simple structures and are easy to manufacture. By welding the two semicircular tubes 110 and the two triangular plates 120 to each other to form the tubular structure 100, the manufacturing difficulty of the tubular structure 100 can be reduced, and at the same time, it is low to ensure that the precision of the semicircular tubes 110 and the triangular plates 120 during manufacturing meets the preset requirements, thereby reducing the difficulty of meeting the requirements for manufacturing precision of the tubular structure 100.

[0076] For further reference, Figure 5 、 Figure 6 and Figure 9 In step S110, the following steps are included but not limited to:

[0077] Step S111: cutting the first plate 500 along its center line to form a plurality of spaced cutting segments 501 , with the line connecting the plurality of cutting segments 501 forming a reserved cutting line;

[0078] It is understandable that in the subsequent steps, the cylinder 510 needs to be cut along the center line of the first plate 500 so that the cylinder 510 forms two semicircular tubes 110; by forming a reserved cutting line on the first plate 500, the subsequent cutting allowance of the cylinder 510 can be reduced, and the deformation of the cylinder 510 when cutting the cylinder 510 can be reduced, so as to improve the processing accuracy of the semicircular tube 110; at the same time, the reserved cutting line can serve as a mark, and when cutting the cylinder 510 in the subsequent steps, the staff can cut along the reserved cutting line without drawing a marking line on the cylinder 510.

[0079] Step S112: using a plate rolling machine to roll the cut first plate 500 into a tube to form a cylinder 510, wherein the reserved cutting line is parallel to the central axis of the cylinder 510;

[0080] It is understandable that when the cut first plate 500 is rolled using a plate rolling machine, the end faces of the first plate 500 at both ends close to each other must remain parallel to the axis of the roller to ensure that the roundness of the cylinder 510 meets the standard.

[0081] Specifically, the plate rolling machine can be a CNC three-roller plate rolling machine.

[0082] Step S113: cutting the cylinder 510 along the reserved cutting line to form two semicircular tubes 110;

[0083] Step S114: Draw the outlines of the two triangular plate members 120 on the second plate member;

[0084] Step S115 : cutting the second plate along the contour line to form two triangular plate members 120 .

[0085] For further reference, Figure 10 In step S120, the following steps are included but not limited to:

[0086] Step S121: building a tire frame 400 on the ground;

[0087] Step S122: hoisting the two semicircular tubes 110 and the two triangular plates 120 onto the tire frame 400, respectively, so that the two ends of one triangular plate 120 abut against the first ends of the two semicircular tubes 110, and the two ends of the other triangular plate 120 abut against the second ends of the two semicircular tubes 110;

[0088] It is understandable that by building a tire frame 400 on the ground, the two semicircular tubes 110 and the two triangular plate members 120 can be spliced ​​on the tire frame 400 to form the shape of the tubular structure 100, which is convenient for subsequent welding operations.

[0089] Step S123: spot welding is performed along the gap between the triangular plate 120 and the semicircular tube 110;

[0090] Step S124 : welding is performed along the gap between the triangular plate 120 and the semicircular tube 110 to completely fill the gap between the triangular plate 120 and the semicircular tube 110 to form the tubular structure 100 .

[0091] It can be understood that before welding the gap between the triangular plate 120 and the semicircular tube 110, spot welding is first performed on the gap between the triangular plate 120 and the semicircular tube 110. This can avoid relative offset between the triangular plate 120 and the semicircular tube 110 when welding them, thereby improving the accuracy of the tubular structure 100 formed by subsequent welding.

[0092] In some embodiments of the present invention, reference Figure 11 The plurality of stiffening plates include a plurality of first stiffening plates 240 and a plurality of second stiffening plates 250. Step S200 includes but is not limited to the following steps:

[0093] Step S210: inserting the reinforcing circular tube 210 into the first reinforcing inner ring plate 220 and welding the connection between the reinforcing circular tube 210 and the first reinforcing inner ring plate 220;

[0094] It is understandable that, in order to facilitate subsequent welding between the first reinforcing inner ring plate 220 and the wall of the inner cavity 101 , a groove may be provided on the annular side wall of the first reinforcing inner ring plate 220 .

[0095] Step S220: Welding a plurality of first stiffening plates 240 along the circumferential direction on the side wall of the reinforced circular tube 210, and welding the first stiffening plates 240 and the adjacent ends of the first reinforcing inner ring plate 220;

[0096] It can be understood that after the reinforcement node 200 is manufactured, the opposite ends of the first stiffening plate 240 are welded to the first reinforcement inner ring plate 220 and the second reinforcement inner ring plate 230 respectively, and then the first stiffening plate 240 can improve the strength of the first reinforcement inner ring plate 220 and the second reinforcement inner ring plate 230, thereby improving the strength of the reinforcement node 200.

[0097] Step S230: inserting the reinforcing circular tube 210 into the second reinforcing inner ring plate 230, welding the joints between the reinforcing circular tube 210 and the second reinforcing inner ring plate 230, and welding the adjacent ends of the first stiffening plate 240 and the second reinforcing inner ring plate 230;

[0098] It is understandable that, in order to facilitate the subsequent welding between the second reinforcing inner ring plate 230 and the wall of the inner cavity 101 , a groove may be provided on the annular side wall of the second reinforcing inner ring plate 230 .

[0099] Step S240 : welding a plurality of second stiffening plates 250 along the circumferential direction on the side wall of the reinforced circular tube 210 , and welding the second stiffening plates 250 to an end of the second reinforcing inner ring plate 230 away from the first stiffening plate 240 .

[0100] In some embodiments of the present invention, reference Figure 7 Before step S100, the following steps are also included but not limited to:

[0101] Step S10: 3D modeling of the variable-section steel pipe is performed using 3D software, and dimensional parameters of various structures of the variable-section steel pipe are measured, wherein the dimensional parameters are used for subsequent auxiliary manufacturing of the variable-section steel pipe.

[0102] It is understandable that different buildings and locations within buildings require different specifications for variable-section steel pipes. Before manufacturing variable-section steel pipes, 3D modeling of the pipes is performed using 3D software. This allows for accurate measurement of the dimensional parameters of each structure within the pipes. Based on these dimensional parameters, workers can then process each structure to meet the requirements, ensuring that the welded pipes meet the requirements.

[0103] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. Variable cross-section steel pipe, characterized in that: include: A tubular structure (100), wherein the cross-sectional dimension of the tubular structure (100) gradually increases along a preset direction, and an inner cavity (101) extending along the preset direction is provided in the tubular structure (100); A reinforcement node (200) is provided in the inner cavity (101), the reinforcement node (200) comprising a reinforcement circular tube (210), a first reinforcement inner ring plate (220) and a second reinforcement inner ring plate (230), the reinforcement circular tube (210) respectively passing through and fixedly connected to the first reinforcement inner ring plate (220) and the second reinforcement inner ring plate (230), and the outer wall of the first reinforcement inner ring plate (220) and the outer wall of the second reinforcement inner ring plate (230) are respectively welded to the cavity wall of the inner cavity (101); The reinforcement node (200) further includes a plurality of stiffening plate groups, each of which includes a plurality of stiffening plates distributed along the circumference of the reinforcement circular tube (210), and at least one stiffening plate group is provided between the first reinforcement inner ring plate (220) and the second reinforcement inner ring plate (230); The tubular structure (100) comprises two semicircular tubes (110) and two triangular plate members (120), wherein the two side edges of one of the triangular plate members (120) are respectively fixedly connected to the first side edges of the two semicircular tubes (110), and the two side edges of the other triangular plate member (120) are respectively fixedly connected to the second side edges of the two semicircular tubes (110).

2. The variable cross-section steel pipe according to claim 1, characterized in that: It also includes two cover plates (300), two openings communicating with the inner cavity (101) are respectively formed at both ends of the tubular structure (100), and the two cover plates (300) are respectively arranged at the two openings and respectively connected to the edges of the two openings.

3. A method for manufacturing a variable-section steel pipe, characterized in that: For manufacturing the variable-section steel pipe according to claim 1, the manufacturing method comprises: Processing a tubular structure (100); Welding a first reinforcing inner ring plate (220), a second reinforcing inner ring plate (230), and a plurality of stiffening plate groups to the side walls of the reinforcing circular tube (210) to form a reinforcing node (200); Welding the first reinforcing inner ring plate (220) and the second reinforcing inner ring plate (230) to the cavity wall of the inner cavity (101) respectively, so that the reinforcing node (200) is welded in the inner cavity (101) of the tubular structure (100); Cover plates (300) are respectively welded at the two openings of the tubular structure (100) to form a variable-section steel pipe.

4. The method for manufacturing a variable cross-section steel pipe according to claim 3, characterized in that: The tubular structure (100) includes two semicircular tubes (110) and two triangular plate members (120). The process of processing the tubular structure (100) includes: Processing the two semicircular tubes (110) and the two triangular plate members (120) respectively; The two semicircular tubes (110) are respectively welded to the two triangular plate members (120) to form the tubular structure (100).

5. The method for manufacturing a variable cross-section steel pipe according to claim 4, characterized in that: The process of separately processing the two semicircular tubes (110) and the two triangular plate members (120) comprises: Cutting the first plate (500) along the center line of the first plate (500) to form a plurality of spaced cutting segments (501), wherein a line connecting the plurality of cutting segments (501) forms a reserved cutting line; The first plate (500) after cutting is rolled into a tube using a plate rolling machine to form a cylinder (510), wherein the reserved cutting line is parallel to the central axis of the cylinder (510); Cutting the cylinder (510) along the reserved cutting line to form two semicircular tubes (110); Drawing the outlines of the two triangular plate members (120) on the second plate member; The second plate member is cut along the contour line to form two triangular plate members (120).

6. The method for manufacturing a variable cross-section steel pipe according to claim 4, characterized in that: The step of welding the two semicircular tubes (110) to the two triangular plate members (120) comprises: Building a tire frame (400) on the ground; The two semicircular tubes (110) and the two triangular plate members (120) are respectively hoisted onto the tire frame (400), so that the two ends of one triangular plate member (120) are respectively in contact with the first ends of the two semicircular tubes (110), and the two ends of the other triangular plate member (120) are respectively in contact with the second ends of the two semicircular tubes (110); Spot welding is performed along the gap between the triangular plate member (120) and the semicircular tube member (110); Welding is performed along the gap between the triangular plate (120) and the semicircular tube (110) to completely fill the gap between the triangular plate (120) and the semicircular tube (110) to form the tubular structure (100).

7. The method for manufacturing a variable cross-section steel pipe according to claim 3, characterized in that: The plurality of stiffening plate groups include a plurality of first stiffening plates (240) and a plurality of second stiffening plates (250), and the first reinforcing inner ring plate (220), the second reinforcing inner ring plate (230) and the plurality of stiffening plate groups are respectively welded to the side wall of the reinforcing circular tube (210), comprising: The reinforcing circular tube (210) is inserted into the first reinforcing inner ring plate (220), and the connection between the reinforcing circular tube (210) and the first reinforcing inner ring plate (220) is welded; Welding a plurality of the first stiffening plates (240) along the circumferential direction on the side wall of the reinforced circular tube (210), and welding the first stiffening plates (240) and the first reinforcing inner ring plate (220) at adjacent ends thereof; The reinforcing circular tube (210) is inserted into the second reinforcing inner ring plate (230), the connection between the reinforcing circular tube (210) and the second reinforcing inner ring plate (230) is welded, and the adjacent ends of the first stiffening plate (240) and the second reinforcing inner ring plate (230) are welded; A plurality of second stiffening plates (250) are welded circumferentially on the side wall of the reinforced circular tube (210), and the second stiffening plates (250) are welded to an end of the second reinforced inner ring plate (230) away from the first stiffening plate (240).

8. The method for manufacturing a variable cross-section steel pipe according to claim 3, characterized in that: Before manufacturing variable-section steel pipes, it also includes: The variable-section steel pipe is three-dimensionally modeled using three-dimensional software, and the dimensional parameters of each structure of the variable-section steel pipe are measured, wherein the dimensional parameters are used to subsequently assist in the manufacture of the variable-section steel pipe.

Images