Multi-pipe truss and manufacturing method

Abstract

The invention discloses a multi-pipe truss and a manufacturing method, and belongs to the field of pipe trusses and manufacturing processes, the multi-pipe truss and the manufacturing method, and the multi-pipe truss comprises chord members; the web members are fixedly connected to the two chord members, and the web members comprise straight web members and diagonal web members; the purlin supporting piece is fixed at the top of the chord member; and the connecting plates are circumferentially distributed at the end part of the chord member by taking the center of the chord member as an axis. The manufacturing method comprises a jig frame and comprises the following steps that S10, the jig frame is erected and adjusted according to a component drawing; s20, the chord member is placed on a supporting plate of the jig frame; s30, straight web members and diagonal web members are assembled and welded; and S40, connecting plates and purlin supporting pieces are assembled. According to the multi-pipe truss and the manufacturing method, the chord members and the web members in the multi-pipe truss are sequentially assembled on the jig frame in a horizontal assembling mode, the assembling height is reduced, the risk in the assembling process is reduced, and the safety of operators is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of tube trusses and manufacturing processes, and in particular to a multi-tube truss and a manufacturing method. Background Art

[0002] In recent years, with the continuous advancement of urban modernization, more and more large-scale public building facilities have been built and put into use in large and medium-sized cities in my country. Tubular trusses are one of them. They are widely used and developed due to their many advantages such as light weight, high strength, large span and easy processing.

[0003] One type of tubular truss is mainly composed of an upper chord, a lower chord and a web. This type of tubular truss is often assembled vertically. Due to the large net space between the upper and lower chords, this assembly method requires operators to work at high altitudes more often during manufacturing, posing a greater safety risk. Summary of the invention

[0004] The invention provides a multi-tube truss and a manufacturing method thereof, aiming to reduce the danger level caused by the vertical assembly of the tube truss in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following scheme: The present invention provides a multi-tube truss, comprising: a chord; a web member, wherein the web member is fixedly connected to two chords, the web member comprises a straight web member and an oblique web member, the straight web member is connected to the same position on the two chords, and the oblique web member is connected to different positions on the two chords; a purlin support member, wherein the purlin support member is fixed to the top of the chord, and the purlin support member comprises a plurality of purlin support plates arranged in parallel.

[0006] Optionally, the multi-tube truss further includes a connecting plate, which is circumferentially distributed on the end surface of the chord with the center of the chord as the axis.

[0007] Optionally, the multi-tube truss is a four-tube truss, which includes four straight tube chords, namely a first chord, a second chord, a third chord and a fourth chord; the first chord is located at the bottom, and the third chord is located directly above the first chord; in the vertical direction, the second chord and the fourth chord are at the same height, both located between the first chord and the third chord; in the horizontal direction, the second chord and the fourth chord are arranged on both sides with the first chord or the third chord as the axis.

[0008] Optionally, the straight web member is a first straight web member, and the third chord member is connected to the second chord member and the fourth chord member through a plurality of first straight web members arranged in parallel; the diagonal web member is a first diagonal web member, and the other chord members are connected in pairs through first diagonal web members.

[0009] Optionally, the multi-tube truss is a three-tube truss, and the three-tube truss includes a first unit and a second unit, and the first unit and the second unit are fixedly connected via the connecting plate.

[0010] Optionally, the first unit and the second unit both include three curved chords, namely a first upper chord, a second upper chord and a lower chord; the straight web is a second straight web, and the diagonal web is a second diagonal web; the first upper chord, the second upper chord and the lower chord are connected by a second straight web and a second diagonal web.

[0011] Optionally, a bearing ball is provided at the end of the chord, and ends of part of the second straight web members and part of the second oblique web members are connected to the bearing ball.

[0012] A multi-tube truss manufacturing method provided by the present invention is used to manufacture a multi-tube truss as claimed in any one of claims 1 to 7; The steps include: S10, pretreatment: performing shot blasting and rust removal treatment on the manufactured chord rod, setting up a tire frame, wherein the tire frame comprises a crossbeam, a longitudinal beam, and a support beam connecting the crossbeam and the longitudinal beam, wherein a support plate is provided on the longitudinal beam, and a circular arc-shaped depression is provided on the top of the support plate, and the chord rod is placed on the support plate of the tire frame; S20, assembling and welding the straight web members and the diagonal web members, if the intersecting welds of the diagonal web members and the straight web members overlap, firstly weld the intersecting hidden welds of the straight web members, and then assemble the diagonal web members; S30, assembling the connecting plates at both ends of the chord and the purlin support members above the chord.

[0013] Optionally, when the multi-tube truss is the four-tube truss, the plurality of longitudinal beams located outside the tire frame are connected by reinforcing strips.

[0014] Optionally, when the multi-tube truss is the three-tube truss, a ground sample line is set on the bottom surface of the bottom of the tire frame, and the ground sample line coincides with the projection of the three-tube truss on the ground; When positioning the purlin support member on the three-tube truss, the following process is included: S231, drawing a ground sample line according to the size of the drawing, and marking the projection point of the purlin support on the ground; S232, determining the position of the purlin support on the chord by aligning the bottom of the plumb line or its extension line with the projection point, and assembling the purlin support; S233, the preset distance between the two purlin supporting plates is D, and during assembly, the spacing between the purlin supporting plates is (D-3, D) mm; After the second body is manufactured on the tire frame, it is removed from the tire frame, turned over, and its bottom is welded.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The multi-tube truss is assembled horizontally. First, the ground is laid out to make a tire frame, and then the chords and webs in the multi-tube truss are assembled on the tire frame in turn. Compared with the vertical assembly, which often requires high-altitude work, the horizontal assembly is at a lower height, so the risk is small, which greatly guarantees the safety of the operators; 2. The structures of tube trusses are varied, including trusses composed of three, four or more chords, and trusses in which the chords are straight or curved. The processing techniques of these trusses vary. The process method provided in this application can be applied to the manufacture of tube trusses in various situations, thereby improving the applicability of the tube truss manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 The diagram is a schematic diagram of a frame structure and placement of a four-tube truss provided in the first embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the installation structure of the chord and web members of a four-tube truss provided in Example 1 of the present invention.

[0019] Figure 3 It is a structural schematic diagram of assembling purlin supports and connecting plates in a four-tube truss provided in Example 1 of the present invention.

[0020] Figure 4 It is a schematic diagram of the frame structure and placement of a three-tube truss provided in the second embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the installation structure between the chord and the tire frame of a three-tube truss provided in Example 2 of the present invention.

[0022] Figure 6 This is a front view of a three-tube truss provided in Example 2 of the present invention.

[0023] Figure 7 It is a top view of a three-tube truss provided in the second embodiment of the present invention.

[0024] Figure 8 It is a structural schematic diagram of a purlin support provided in an embodiment of the present invention.

[0025] Main component symbols: 1. Tire frame; 11. Cross beam; 12. Longitudinal beam; 13. Support beam; 14. Reinforcement slats; 15. Support plate; 16. Ground sample line; 2. Four-tube truss; 21. First chord; 22. Second chord; 23. Third chord; 24. Fourth chord; 25. First diagonal web member; 26. First straight web member; 3. Purlin support; 31. Purlin support plate; 4. Connecting plate; 5. Three-tube truss; 51. First unit; 52. Second unit; 53. First upper chord; 54. Second upper chord; 55. Lower chord; 56. Second straight web member; 57. Second oblique web member; 58. Support ball. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention 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 of the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may include one or more of the features explicitly or implicitly. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0028] Embodiment 1 Refer to the attached drawings of the specification, such as Figure 1-Figure 3 , Figure 8As shown, a multi-tube truss proposed in the present application is specifically a four-tube truss 2 composed of four chords, and the four chords are respectively a first chord 21, a second chord 22, a third chord 23, and a fourth chord 24. The first chord 21 is located at the bottom, and the third chord 23 is located directly above the first chord 21. In the vertical direction, the second chord 22 and the fourth chord 24 are located at the same height, both located between the first chord 21 and the third chord 23. In the horizontal direction, the second chord 22 and the fourth chord 24 are arranged on both sides with the first chord 21 or the third chord 23 as the axis. As a result, a four-tube truss with a rhombus-like cross section is formed.

[0029] The four-tube trusses are connected by multiple web members, which include straight web members and diagonal web members. Figure 5 As shown, the third chord 23 at the top is connected to the second chord 22 and the fourth chord 24 on both sides through a plurality of first straight web members 26 arranged in parallel. When connected, the position where the first straight web member 26 contacts the second chord 22 or the fourth chord 24 corresponds to the position where the first straight web member 26 contacts the third chord 23, that is, both contact positions are located in the plane where the circular cross section of the chord is located. In addition, the first chord 21, the second chord 22, the third chord 23 and the fourth chord 24 are connected in pairs through a plurality of first diagonal web members 25. Taking the first chord 21 as an example, three first diagonal web members 25 extend from a certain point on the first chord 21, and these three first diagonal web members 25 respectively generate three contact points with the second chord 22, the third chord 23 and the fourth chord 24. At this time, the point position generates three planes with the contact points of each chord, and these three planes do not overlap and are not the planes where the circular cross section of the chord is located. Based on this method, it is used to distinguish between straight web members and diagonal web members.

[0030] A plurality of purlin support members 3 are arranged at intervals on the surfaces of the first, second and fourth chord members, and a purlin support plate 31 is arranged on the purlin support members 3 .

[0031] With the center of the chord bar as the axis, a plurality of connecting plates 4 are arranged at the end of the chord bar along the circumferential direction of the chord bar surface.

[0032] For this four-tube truss, when manufacturing it, multiple tire frames 1 are needed as auxiliary tools. Figure 1 As shown, the tire frame 1 includes a crossbeam 11, a longitudinal beam 12, and a support beam 13 that is arranged obliquely to connect the crossbeam 11 and the longitudinal beam 12. A support plate 15 for supporting the chord is arranged on the longitudinal beam 12. The top of the support plate 15 is an arc-shaped depression to match the surface of the chord. When multiple tire frames 1 are placed, the tire frames 1 are relatively fixed to each other by connecting the reinforcing strips 14 to the surface of the longitudinal beam 12 outside the tire frame 1.

[0033] In addition, manufacturing the four-tube truss 2 also includes the following steps: S10, pretreatment: performing shot blasting and rust removal treatment on the manufactured chord rod, and setting up a tire frame 1; S20, assembling and welding the first straight web member 26 and the first diagonal web member 25. If the intersecting welds of the first diagonal web member 25 and the first straight web member 26 overlap, first weld the intersecting hidden welds of the first straight web member 26, and then assemble the first diagonal web member 25; S30, assembling the connecting plates 4 at both ends of the chord and the purlin support 3 above the chord.

[0034] After the above steps, the formed four-tube truss is removed from the tire frame to form a product.

[0035] During welding, the butt weld between the web and the chord is full penetration level one.

[0036] When the wall thickness of the welded pipe is ≤6mm, a full-circle fillet weld is used; When the wall thickness of the welded pipe is greater than 6mm and the acute angle θ is greater than or equal to 75°, a full penetration weld with a full bevel is used; When the wall thickness of the welded pipe is greater than 6mm and the acute angle θ is less than 75°, full penetration welds with grooves are used at the toe and sides of the web, and partial penetration welds with grooves are used at the root of the web; when the angle θ is less than 35°, fillet welds can be used.

[0037] Embodiment 2 Refer to the attached drawings of the specification, such as Figure 4-Figure 8 As shown, a multi-tube truss proposed in the present application is specifically a three-tube truss 5 including three chords. Compared with the four-tube truss 2 in the first embodiment, the chords in the three-tube truss 5 in this embodiment are all bent rods. It includes a first unit 51 and a second unit 52, wherein the first unit 51 and the second unit 52 are fixedly connected by a connecting plate 4 at the end of the chord. The first unit 51 and the second unit 52 both include a first upper chord 53, a second upper chord 54 and a lower chord 55, and the first upper chord 53, the second upper chord 54 and the lower chord 55 are connected by a second straight web 56 and a second diagonal web 57.

[0038] A support ball 58 is provided at the end of the chord in the second body 5 , and the ends of the second straight web member 56 and the second oblique web member 57 can be connected to the support ball 58 .

[0039] In addition, a plurality of purlin support members 3 are arranged at intervals on the surfaces of the first upper chord 53 and the second upper chord 54 , and a purlin support plate 31 is arranged on the purlin support members 3 .

[0040] When manufacturing the three-tube truss, a plurality of tire frames 1 are used as auxiliary tools. Figure 7As shown, the tire frame 1 includes a crossbeam 11, a longitudinal beam 12, and a support beam 13 that is inclined to connect the crossbeam 11 and the longitudinal beam 12. A support plate 15 for supporting the chord is provided on the longitudinal beam 12. The top of the support plate 15 is an arc-shaped depression to match the surface of the chord. Since the three-tube truss has a curvature, it needs to be divided into multiple parts when manufacturing the three-tube truss. In this embodiment, it is divided into two parts, a first unit 51 and a second unit 52. A ground sample line 16 is placed on the ground at the bottom of the tire frame 1. The position of the ground sample line 16 is the projection of the chord on the ground. The ground sample line 16 assists in the manufacture of the three-tube truss.

[0041] The manufacturing of the three-tube truss also includes the following steps: S200, pretreatment: After cutting, the steel pipe used to make the chord is bent to reach the specified curvature, and the chord is shot blasted to remove rust; a tire frame is set up, and a ground sample line 16 is placed on the ground according to the curvature of the chord.

[0042] S210, placing chords: using a plumb line to control the curvature of each chord, the first upper chord 53 and the second upper chord 54 are both coincident with the ground sample line 16, and after the relative distances of the chords are determined, they are fixed on the support plate 15 of the tire frame 1.

[0043] S220, assembling the web members between the chord members: if the intersecting welds of the second diagonal web member 57 and the second straight web member 56 overlap, first weld the intersecting hidden welds of the second straight web member 56, and then assemble the second diagonal web member 57.

[0044] S230, assembling the connecting plates at both ends of the chord bar and the purlin support members 3 on the first upper chord bar 53 and the second upper chord bar 54.

[0045] S240, taking down the three-tube truss 5 on the tire frame 1 and flipping it over for welding.

[0046] Before assembling the purlin support 3 on the three-tube truss 5, its specific position needs to be located, which specifically includes the following process: S231, draw a ground sample line 16 according to the size of the drawing, and mark the projection point of the purlin support member 3 on the ground.

[0047] S232, determine the position of the purlin support 3 on the chord by aligning the bottom of the plumb line or its extension line with the projection point, and assemble the purlin support 3.

[0048] S233. The preset distance between the two purlin supporting plates 31 is D. During assembly, the spacing between the purlin supporting plates 31 is (D-3, D) mm.

[0049] After the manufacturing on the tire frame is completed, the three-tube truss 5 is removed from the tire frame 1, turned over and welded to the bottom.

[0050] When welding the second straight web 56 and the support ball 58, a sleeve groove is added for full penetration welding to avoid direct welding without a sleeve.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-tube truss, characterized in that: include: chord rod; A web member, the web member is fixedly connected to the two chord members, the web member comprises a straight web member and an oblique web member, the straight web member is connected to the same position on the two chord members, and the oblique web member is connected to different positions on the two chord members; A purlin support member (3), the purlin support member (3) being fixed to the top of the chord, the purlin support member (3) comprising a plurality of purlin support plates (31) arranged in parallel.

2. A multi-tube truss according to claim 1, characterized in that: A connecting plate (4), wherein the connecting plate (4) is circumferentially distributed on the end surface of the chord rod with the center of the chord rod as the axis.

3. A multi-tube truss according to claim 1, characterized in that: Also includes: The multi-tube truss is a four-tube truss (2), and the four-tube truss (2) comprises four straight tube chords, namely a first chord (21), a second chord (22), a third chord (23), and a fourth chord (24); The first chord bar (21) is located at the bottom, and the third chord bar (23) is located directly above the first chord bar (21); In the vertical direction, the second chord (22) and the fourth chord (24) are located at the same height and are both located between the first chord (21) and the third chord (23); in the horizontal direction, the second chord (22) and the fourth chord (24) are located on both sides with the first chord (21) or the third chord (23) as an axis.

4. A multi-tube truss according to claim 3, characterized in that: The straight web member is a first straight web member (26), and the third chord member (23) is connected to the second chord member (22) and the fourth chord member (24) via a plurality of first straight web members (26) arranged in parallel; The diagonal web member is a first diagonal web member (25), and the other chord members are connected in pairs via the first diagonal web member (25).

5. The multi-tube truss according to claim 1, characterized in that: The multi-tube truss is a three-tube truss (5), and the three-tube truss (5) comprises a first unit (51) and a second unit (52), and the first unit (51) and the second unit (52) are fixedly connected via the connecting plate (4).

6. A multi-tube truss according to claim 5, characterized in that: The first unit (51) and the second unit (52) both comprise three curved chord rods, namely a first upper chord rod (53), a second upper chord rod (52) and a lower chord rod (53); The straight web member is a second straight web member (56), the diagonal web member is a second diagonal web member (57), and the first upper chord member (53), the second upper chord member (52) and the lower chord member (53) are connected via the second straight web member (56) and the second diagonal web member (57).

7. The multi-tube truss according to claim 6, characterized in that: A support ball (58) is provided at the end of the chord, and ends of part of the second straight web member (56) and part of the second oblique web member (57) are connected to the support ball (58).

8. A method for manufacturing a multi-tube truss, characterized in that: Used to manufacture a multi-tube truss according to any one of claims 1 to 7; The steps include: S10, pretreatment: performing shot blasting and rust removal treatment on the manufactured chord rod, erecting a tire frame (1), wherein the tire frame (1) comprises a crossbeam (11), a longitudinal beam (12), and a support beam (13) connecting the crossbeam (11) and the longitudinal beam (12), wherein a support plate (15) is provided on the longitudinal beam (12), and a circular arc-shaped depression is provided on the top of the support plate (15), and the chord rod is placed on the support plate (15) of the tire frame (1); S20, assembling and welding the straight web members and the diagonal web members, if the intersecting welds of the diagonal web members and the straight web members overlap, firstly weld the intersecting hidden welds of the straight web members, and then assemble the diagonal web members; S30, assembling the connection plates (4) at both ends of the chord and the purlin support (3) above the chord.

9. A method for manufacturing a multi-tube truss according to claim 8, characterized in that: When the multi-tube truss is the four-tube truss (2), the plurality of longitudinal beams (12) located outside the tire frame (1) are connected via reinforcing strips (14).

10. The method for manufacturing a multi-tube truss according to claim 8, characterized in that: When the multi-tube truss is the three-tube truss (5), a ground sample line (16) is provided on the bottom surface of the bottom of the tire frame (1), and the ground sample line (16) coincides with the projection of the three-tube truss (5) on the ground; When positioning the purlin support member (3) on the three-tube truss (5), the following process is included: S231, drawing a ground sample line (16) according to the size of the drawing, marking the projection point of the purlin support (3) on the ground; S232, determining the position of the purlin support (3) on the chord by aligning the bottom of the plumb line or its extension line with the projection point, and assembling the purlin support (3); S233, the preset distance between the two purlin supporting plates (31) is D, and during assembly, the spacing between the purlin supporting plates (31) is in the range of (D-3, D) mm; After the second body is manufactured on the tire frame, it is removed from the tire frame, turned over, and its bottom is welded.

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