Crane truss structure with a lower chord of parallel crane beams

Abstract

This utility model discloses a crane truss structure with a parallel crane beam as the lower chord, comprising: a lower chord structure, which includes two crane beams arranged in parallel and spaced apart, with multiple upper connecting plates connecting the upper flanges of the two crane beams and multiple lower connecting plates connecting the lower flanges of the two crane beams; the two ends of the crane beams are used to connect to corresponding factory building brackets; an upper chord structure, located above the lower chord structure; and a web member assembly, which includes multiple diagonal web members and multiple vertical web members connecting the upper and lower chord structures, with multiple node structures provided on both the upper and lower chord structures; the two ends of the diagonal web members are connected to the corresponding node structures, and the two ends of the vertical web members are connected to the corresponding node structures. This utility model can solve the problems of existing ultra-large span crane beams having large cross-sectional heights, occupying a large amount of space below the rail surface, affecting the air circulation inside the workshop, using a large amount of steel, having complex stress, and being inconvenient to install.

Description

Technical Field

[0001] This utility model relates to the field of industrial building technology, and in particular to a crane truss structure with a parallel crane beam as the lower chord. Background Technology

[0002] There are two common traditional crane beam arrangements: one uses a solid-web crane beam structure, and the other uses a crane truss structure combining crane beams and trusses. However, both structures are placed below the crane rail surface, occupying the space below the rail surface, and both have some drawbacks.

[0003] For solid-web crane beam structures, when the process layout requires an increase in the span of the crane beam, the cross-sectional height of the crane beam is generally increased, which will occupy the usable space below the crane rail surface. When the span of the crane beam exceeds 36m, especially exceeding 48m, increasing the cross-sectional height of the crane beam becomes uneconomical. This large cross-section crane beam is similar to a 5m to 6m "high wall", occupying the clearance below the crane rail surface, which restricts the process layout to a certain extent. Moreover, this "high wall" also affects the air circulation in the workshop and the heat dissipation of high-temperature products.

[0004] For crane truss structures combining crane beams and trusses, achieving large spans using crane trusses is extremely difficult due to the fact that crane truss spans generally do not exceed 36m. If the span reaches 50m, 60m, or even 100m or more, it becomes very challenging. There are two main reasons for this: First, once the rail surface elevation is determined, the clearance below the crane truss is limited, preventing the truss height from increasing proportionally with the span increase after column removal, resulting in excessively large truss chord sections. Second, because the lower chord of the truss is under tension, the internal forces in the web members are large, and the fatigue strength at the nodes between the web members and the chord members is low. When the crane truss span is extremely large, using conventional crane trusses is very uneconomical and lacks practical application value.

[0005] Currently, some improved crane truss structures combining crane beams and trusses have emerged, allowing the truss to utilize the space above the crane rails and reduce the space occupied below the rails, but some shortcomings still exist.

[0006] For example, patent CN220264985U discloses a crane truss and factory structure. This patent provides a connection method between the web members of the crane truss and the box-shaped section of the lower chord. In this patent, the web members extend two vertical node plates and connect with two transverse diaphragms in the box-shaped section of the lower chord. However, this patent has the following disadvantages: (1) The lower chord of this patent is an integral box-shaped section. When welding the transverse diaphragms in the box-shaped section, there are many hidden welds, which cannot guarantee the welding quality; (2) Since the lower chord is a closed section, when the web members extend two vertical plates into the box-shaped section, multiple closed cavities are formed in the lower chord node area. These closed cavities form many hidden welds, which affect the welding quality.

[0007] For example, patent CN217676413U discloses a large-span crane truss structure. The web members of this patent are arranged in a W-shape and there are no vertical web members. The lower chord of this patent is an integral box-shaped section. The upper chord of this patent is a uniform section. However, the patent has the following disadvantages: (1) Since the lower chord of the patent is an integral box section, it is often impossible to weld due to the closed characteristics of the section, or the welding quality cannot meet the requirements. Secondly, the flange of the box section is generally thicker, and the middle part contributes less to the strength of the component, so the amount of steel used is large. Thirdly, since the lower chord is a closed section, there are many hidden welds when dealing with the connection node plate between the web members and the lower chord, which affects the welding quality. (2) The web members of the patent are arranged in a W-shape and there are no vertical web members, which makes it difficult to connect the middle roof beam (or roof truss) with the upper chord, especially when the middle is a roof truss, the lower chord of the roof truss has no fixed position. (3) The upper chord of the patent is a uniform section, and the influence of internal force changes on the section is not considered. The section size is not adjusted according to the internal force changes, resulting in material waste. In addition, the upper chord end section is generally a non-stressed component, and the same section as the middle section is used, which causes waste.

[0008] In view of this, based on years of experience in production and design in this and related fields, the inventor has designed a crane truss structure with a lower chord consisting of a crane beam with corbels through repeated experiments, in order to solve at least some of the problems existing in the prior art. Utility Model Content

[0009] The purpose of this utility model is to provide a crane truss structure with a parallel crane beam as the lower chord, which can solve the problems of existing ultra-large span crane beams having large cross-sectional heights, occupying a lot of space below the rail surface, affecting the air circulation inside the workshop, using a large amount of steel, having complex stress, and being inconvenient to install.

[0010] The purpose of this utility model is achieved as follows: a crane truss structure with a lower chord as a parallel crane beam, comprising:

[0011] The lower chord structure includes two crane beams arranged in parallel and spaced apart. The crane beams have an I-shaped cross section. Multiple upper connecting plates are connected between the upper flange plates of the two crane beams, and multiple lower connecting plates are connected between the lower flange plates of the two crane beams. The top surface of the upper flange plate of the crane beam is used to install the crane rail, and the two ends of the crane beam are used to connect the corresponding factory building brackets.

[0012] The upper chord structure is located above the lower chord structure;

[0013] The web member assembly includes multiple diagonal web members and multiple vertical web members connected between the upper chord structure and the lower chord structure. Multiple node structures are provided on both the upper chord structure and the lower chord structure. The two ends of the diagonal web members are connected to the corresponding node structures, and the two ends of the vertical web members are connected to the corresponding node structures.

[0014] In a preferred embodiment of this utility model, the cross-sectional height of the crane beam is ≤2.5m.

[0015] In a preferred embodiment of the present invention, the upper chord structure, the diagonal web member, and the vertical web member are H-shaped or box-shaped cross sections, and each of the upper chord structure, the diagonal web member, and the vertical web member includes two flange plates and one or two web plates.

[0016] In a preferred embodiment of this utility model, a plurality of central node structures are provided on the lower chord structure. Each central node structure is connected to a corresponding vertical web member. Each central node structure includes two central node vertical plates arranged in parallel and spaced apart. The two central node vertical plates are connected to two crane beams through a central connecting assembly. A lower straight node web member is connected between the two central node vertical plates arranged opposite to each other in each central node structure. The two flange plates of the vertical web member are respectively connected to the two central node vertical plates arranged opposite to each other in the corresponding central node structure. The web member is connected to the corresponding lower straight node web member.

[0017] In a preferred embodiment of this utility model, the central node structure is also connected to at least one corresponding diagonal web member. The central node vertical plate includes a lower straight node vertical plate and at least one first lower diagonal node vertical plate connected to each other. A lower straight node web member is connected between two lower straight node vertical plates arranged opposite each other in the central node structure, and a first lower diagonal node web member is connected between two first lower diagonal node vertical plates arranged opposite each other in the central node structure. The two flange plates of the vertical web member are respectively connected to the corresponding lower straight node vertical plates, and the two flange plates of the diagonal web member are respectively connected to the two first lower diagonal node vertical plates arranged opposite each other in the corresponding central node structure. The web member of the diagonal web member is connected to the corresponding first lower diagonal node web member.

[0018] In a preferred embodiment of the present invention, the middle connecting assembly includes a first upper flange plate connected between the upper flange plates of the two crane beams and a first lower flange plate connected between the lower flange plates of the two crane beams. At least one first partition plate is connected between the first upper flange plate and the first lower flange plate. The middle node vertical plate passes through the first upper flange plate into the space between the two crane beams and is connected to the first upper flange plate, the first lower flange plate and the first partition plate.

[0019] In a preferred embodiment of the present invention, a first partition is provided between the first upper wing connecting plate and the first lower wing connecting plate, and a first lower opening groove is provided on the middle node vertical plate, and the first partition is inserted into the first lower opening groove; or two first partitions are provided at intervals between the first upper wing connecting plate and the first lower wing connecting plate, and the two sides of the middle node vertical plate are respectively connected to the two first partitions.

[0020] In a preferred embodiment of this utility model, the first upper wing connecting plate is connected to the upper connecting plate by high-strength bolts, the first lower wing connecting plate is connected to the lower connecting plate by high-strength bolts, the first upper wing connecting plate is welded to the upper flange plates of the two crane beams, and the first lower wing connecting plate is welded to the lower flange plates of the two crane beams; the surface of the first partition plate is perpendicular to the web of the crane beam, the top and bottom ends of the first partition plate are welded to the upper flange plates and lower flange plates of the two crane beams respectively, and the two sides of the first partition plate are welded to the web of the two crane beams respectively; two first opening slots are provided on the first upper wing connecting plate, and the middle node vertical plate can pass through the corresponding first opening slots. The middle node vertical plate is welded to the first upper wing connecting plate, the first lower wing connecting plate, and the first partition plate.

[0021] In a preferred embodiment of this utility model, two end node structures are provided at both ends of the lower chord structure, and each end node structure is connected to a corresponding diagonal web member; each end node structure includes two parallel and spaced second lower diagonal node vertical plates, the two second lower diagonal node vertical plates are connected to two crane beams through end connecting components, and a second lower diagonal node web plate is connected between the two second lower diagonal node vertical plates; the two flange plates of the diagonal web member are respectively connected to the two oppositely arranged second lower diagonal node vertical plates in the corresponding end node structure, and the web plate of the diagonal web member is connected to the corresponding second lower diagonal node web plate.

[0022] In a preferred embodiment of the present invention, the end connection assembly includes a second upper flange plate connected between the upper flange plates of the two crane beams and a second lower flange plate connected between the lower flange plates of the two crane beams. At least one second partition plate is connected between the second upper flange plate and the second lower flange plate. The second lower inclined node vertical plate passes through the second upper flange plate into the space between the two crane beams and is connected to the second upper flange plate, the second lower flange plate and the second partition plate.

[0023] In a preferred embodiment of the present invention, a second partition is provided between the second upper wing connecting plate and the second lower wing connecting plate, and one side profile of the second lower inclined node vertical plate is connected to the second partition; or two second partitions are provided at intervals between the second upper wing connecting plate and the second lower wing connecting plate, and both sides of the second lower inclined node vertical plate are respectively connected to the two second partitions.

[0024] In a preferred embodiment of this utility model, the second upper wing connecting plate is connected to the upper connecting plate by high-strength bolts, and the second lower wing connecting plate is connected to the lower connecting plate by high-strength bolts. The second upper wing connecting plate is welded to the upper flange plates of the two crane beams, and the second lower wing connecting plate is welded to the lower flange plates of the two crane beams. The surface of the second partition plate is perpendicular to the web of the crane beam. The top and bottom ends of the second partition plate are welded to the upper flange plates and lower flange plates of the two crane beams, respectively, and the two sides of the second partition plate are welded to the web plates of the two crane beams, respectively. Two second opening slots are provided on the second upper wing connecting plate, and the second lower inclined node vertical plate can pass through the corresponding second opening slots. The second lower inclined node vertical plate is welded to the second upper wing connecting plate, the second lower wing connecting plate, and the second partition plate.

[0025] In a preferred embodiment of the present invention, a plurality of intermediate plates are provided between the two crane beams, and a maintenance manhole is provided in the middle of the intermediate plate. The intermediate plate is connected to the upper connecting plate, the lower connecting plate and the web of the two crane beams.

[0026] In a preferred embodiment of this utility model, an annular reinforcing plate is also provided on the wall of the manhole.

[0027] In a preferred embodiment of this utility model, the connection node between the upper chord structure and the web member assembly is used to connect the corresponding roof beam; or the connection node between the upper chord structure and the web member assembly is used to connect the upper chord of the roof truss, and a number of vertical web members are used to connect the lower chord of the roof truss.

[0028] In a preferred embodiment of this utility model, the upper chord structure includes an intermediate chord and two connecting rods. The first end of the connecting rod is connected to the corresponding end of the intermediate chord, and the second end of the connecting rod is used to connect to the corresponding upper column of the factory building. The cross-sectional area of ​​the connecting rod is smaller than that of the intermediate chord.

[0029] In a preferred embodiment of this utility model, a plurality of upper node structures are provided on the upper chord structure, each upper node structure being connected to a corresponding vertical web member; each upper node structure includes two upper node vertical plates arranged in parallel and spaced apart, the two upper node vertical plates being connected in series in the upper chord structure, and a horizontal web member being connected between the upper parts of the two upper node vertical plates, the horizontal web member being arranged opposite to the corresponding web member in the upper chord structure; an upper straight node web member is also connected between the two upper node vertical plates arranged opposite to each other in each upper node structure, the two flange plates of the vertical web member are respectively connected to the two upper node vertical plates arranged opposite to each other in the corresponding upper node structure, and the web member is connected to the corresponding upper straight node web member.

[0030] In a preferred embodiment of this utility model, the upper node structure is also connected to at least one corresponding diagonal web member. The lower part of the upper node vertical plate includes a vertical upper node and at least one vertical upper diagonal node connected to each other. A vertical upper node web member is connected between two vertical upper nodes arranged opposite each other in the upper node structure, and a diagonal web member is connected between two vertical upper nodes arranged opposite each other in the upper node structure. The two flanges of the vertical web member are respectively connected to the corresponding vertical upper nodes, and the two flanges of the diagonal web member are respectively connected to the two vertical upper diagonal nodes arranged opposite each other in the corresponding upper node structure. The web member of the diagonal web member is connected to the corresponding diagonal web member.

[0031] In a preferred embodiment of this utility model, the flange plate of the vertical web member and the corresponding vertical plate of the upper straight node, the web plate of the vertical web member and the corresponding web plate of the upper straight node, the flange plate of the oblique web member and the corresponding vertical plate of the upper oblique node, and the web plate of the oblique web member and the corresponding web plate of the upper oblique node are fixed by welding, or connected by high-strength bolts, or a combination of high-strength bolts and welding are used to connect them.

[0032] In a preferred embodiment of this utility model, the two ends of the diagonal web members and the two ends of the vertical web members are fixed to the corresponding node structures by welding, or by high-strength bolts, or by a combination of high-strength bolts and welding.

[0033] In a preferred embodiment of this utility model, a diagonal brace or two diagonal braces arranged in a cross pattern are provided between two adjacent vertical braces, and the ends of a number of vertical braces are connected to the ends of one or two adjacent diagonal braces at the same node structure.

[0034] In a preferred embodiment of this utility model, the thickness of the upper connecting plate is less than the thickness of the upper flange plate of the crane beam, and the thickness of the lower connecting plate is less than the thickness of the lower flange plate of the crane beam.

[0035] As described above, the crane truss structure of this utility model features a parallel crane beam as the lower chord. The upper and lower chord structures are connected by a web member assembly, which links the upper and lower chord structures together. The upper chord structure, web member assembly, and lower chord structure form a single unit. Both the upper chord structure and the web member assembly are located above the rail surface. The entire crane truss structure can meet the requirements for large spans. Furthermore, the upper chord structure and web member assembly primarily occupy the space above the rail surface, while the crane beam is located below the rail surface. The entire crane truss structure occupies relatively little space below the crane rail surface, fully satisfying the process layout requirements. The height of the entire crane truss structure is not limited by the clearance below the crane rail surface, allowing for a higher truss structure height, which brings significant economic advantages to the crane truss. It also solves the problem that existing ultra-large span crane beams have large cross-sectional heights, occupy a lot of lower space, and affect the air circulation inside the workshop. Meanwhile, the two crane beams in the lower chord structure, together with the upper and lower connecting plates, form a box-shaped section, resulting in greater structural stability. Compared to existing structures that directly use a closed, integral box-shaped section, this design facilitates welding and reduces the number of concealed welds. The lower chord structure in this application participates in the truss's load-bearing capacity while also directly bearing the crane's traveling load. Furthermore, its box-shaped section prevents lateral bending, and the web members, which only bear axial tensile and compressive loads, exhibit high load-bearing capacity. The entire crane truss structure is simple in construction, with clearly defined stress distribution, and saves on steel consumption. In addition, the upper chord structure, diagonal web members, vertical web members, crane beams, upper connecting plate, and lower connecting plate can be manufactured modularly, facilitating processing, transportation, and installation. Attached Figure Description

[0036] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0037] Figure 1 This utility model provides a schematic diagram of a crane truss structure with a parallel crane beam as the lower chord, where each node in the lower chord structure has one corresponding partition plate.

[0038] Figure 2 for Figure 1 In the cross-sectional view of AA.

[0039] Figure 3 for Figure 1 In the cross-sectional view of BB.

[0040] Figure 4 for Figure 1 Cross-sectional view at C1-C1.

[0041] Figure 5 for Figure 1 A magnified view of a portion at point V.

[0042] Figure 6A schematic diagram showing the connection between the diagonal web members and the vertical web members of this utility model and the upper node structure using high-strength bolts.

[0043] Figure 7 for Figure 1 A magnified view of the area at point U.

[0044] Figure 8 for Figure 1 A magnified view of the area at W1.

[0045] Figure 9 for Figure 8 Sectional view of D1-D1.

[0046] Figure 10 for Figure 9 Cross-sectional view at E1-E1.

[0047] Figure 11 for Figure 1 A magnified view of the area at X1.

[0048] Figure 12 for Figure 11 Cross-sectional view at F1-F1.

[0049] Figure 13 for Figure 12 Cross-sectional view of G1-G1.

[0050] Figure 14 for Figure 1 A magnified view of the area at Y1.

[0051] Figure 15 for Figure 14 Cross-sectional view at H1-H1.

[0052] Figure 16 for Figure 15 Cross-sectional view of I1-I1.

[0053] Figure 17 for Figure 1 A magnified view of the area at point Z.

[0054] Figure 18 for Figure 17 Cross-sectional view of KK.

[0055] Figure 19 for Figure 17 A cross-sectional view of JJ.

[0056] Figure 20 for Figure 18 Cross-sectional view of LL.

[0057] Figure 21This utility model provides a schematic diagram of a crane truss structure with a parallel crane beam as the lower chord, showing that each node in the lower chord structure has two corresponding partitions.

[0058] Figure 22 for Figure 21 Cross-sectional view at C2-C2.

[0059] Figure 23 A schematic diagram of a crane truss structure with a parallel crane beam as the lower chord, provided by this utility model, arranged in a configuration of 3 sections.

[0060] Figure 24 Another schematic diagram of the crane truss structure with a parallel crane beam as the lower chord provided by this utility model, arranged with 3 sections.

[0061] Figure 25 A schematic diagram of a crane truss structure with a parallel crane beam as the lower chord, provided by this utility model, arranged with 5 sections.

[0062] Figure 26 Another schematic diagram of the crane truss structure with a parallel crane beam as the lower chord provided by this utility model, arranged with 5 sections.

[0063] Figure 27 The cross-sectional view of the upper chord structure provided by this utility model adopting an H-shaped cross section.

[0064] Figure 28 The cross-sectional view of the upper chord structure provided by this utility model adopts a box-shaped cross section.

[0065] Figure 29 Another cross-sectional view of the upper chord structure provided by this utility model, which adopts a box-shaped cross-section.

[0066] Figure 30 for Figure 21 A magnified view of the area at W2.

[0067] Figure 31 for Figure 30 Sectional view at D2-D2.

[0068] Figure 32 for Figure 31 Cross-sectional view at E2-E2.

[0069] Figure 33 for Figure 21 A magnified view at X2.

[0070] Figure 34 for Figure 33 Cross-sectional view at F2-F2.

[0071] Figure 35 for Figure 34Cross-sectional view of G2-G2.

[0072] Figure 36 A schematic diagram showing the connection between the diagonal web members and the vertical web members and the central node structure provided by this utility model using high-strength bolts.

[0073] Figure 37 for Figure 36 In the cross-sectional view of MM.

[0074] Figure 38 for Figure 36 A cross-sectional view of NN.

[0075] Figure 39 for Figure 21 A magnified view of the area at Y2.

[0076] Figure 40 for Figure 39 Cross-sectional view at H2-H2.

[0077] Figure 41 for Figure 40 Cross-sectional view of I2-I2

[0078] Explanation of icon numbers:

[0079] 100. Lower chord structure; 101. Crane beam; 1011. Crane rail; 1012. Central stiffening plate; 1013. Support stiffening plate; 1014. End stiffening plate; 1015. Outer stiffening plate; 102. Upper connecting plate; 103. Lower connecting plate; 104. Intermediate plate; 1041. Manhole; 1042. Reinforcing stiffening plate; 1043. Rectangular plate; 1044. Upper T-shaped plate; 1045. Lower T-shaped plate;

[0080] 200. Upper chord structure; 201. Intermediate chord; 202. Connecting rod;

[0081] 301. Diagonal web member; 302. Vertical web member;

[0082] 400. Upper node structure; 401. Upper node vertical plate; 4011. Upper straight node vertical plate; 4012. Upper inclined node vertical plate; 402. Horizontal web plate; 403. Upper straight node web plate; 404. Upper inclined node web plate; 405. Upper stiffening plate;

[0083] 500. Middle node structure; 501. Middle node vertical plate; 5011. Lower straight node vertical plate; 5012. First lower sloping node vertical plate; 502. Lower straight node web plate; 503. First lower sloping node web plate; 504. First upper wing joint plate; 505. First lower wing joint plate; 506. First partition plate; 507. Web plate splicing plate; 508. Outer wing splicing plate; 509. Inner wing splicing plate;

[0084] 600. End node structure; 601. Second lower inclined node vertical plate; 602. Second lower inclined node web plate; 603. Second upper wing connecting plate; 604. Second lower wing connecting plate; 605. Second partition plate;

[0085] 700. Roof beams;

[0086] 800. Factory building column; 801. Upper column of factory building; 802. Lower column of factory building; 803. Factory building corbel;

[0087] h1, ground position; h2, rail surface elevation; h3, roof elevation. Detailed Implementation

[0088] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0089] like Figures 1 to 41 As shown, this application provides a crane truss structure with a lower chord of a parallel crane beam, comprising:

[0090] The lower chord structure 100 includes two parallel and spaced crane beams 101. The crane beams 101 have an I-shaped cross section. Multiple upper connecting plates 102 are connected between the upper flanges of the two crane beams 101, and multiple lower connecting plates 103 are connected between the lower flanges of the two crane beams 101. The top surface of the upper flange of the crane beam 101 is used to install crane rails 1011, and the two ends of the crane beam 101 are used to connect to the corresponding factory building brackets 803.

[0091] The upper chord structure 200 is located above the lower chord structure 100;

[0092] The web member assembly includes multiple diagonal web members 301 and multiple vertical web members 302 connected between the upper chord structure 200 and the lower chord structure 100. Multiple node structures are provided on both the upper chord structure 200 and the lower chord structure 100. The two ends of the diagonal web members 301 are connected to the corresponding node structures, and the two ends of the vertical web members 302 are connected to the corresponding node structures.

[0093] The lower chord structure 100 consists of two crane beams 101, an upper connecting plate 102, and a lower connecting plate 103. These two crane beams 101 serve as supports for the two node structures at both ends of the lower chord structure 100 and the node structures between the ends, and are designed as continuous crane beams. These two parallel crane beams 101, while acting as the lower chord of the truss, also serve as supports for the crane rails, supporting the longitudinal movement of the crane. The upper flanges of the two crane beams 101 are connected by the upper connecting plate 102, and the lower flanges are connected by the lower connecting plate 103. Thus, the cross-section of the lower chord structure 100 of this crane truss forms a box-shaped section, enhancing the torsional resistance of the lower chord section, and the upper surface of this box-shaped section is suitable for pedestrian access.

[0094] The entire crane truss structure is used for installation between two factory building columns 800. The factory building columns 800 include upper factory building columns 801 and lower factory building columns 802. The upper factory building columns 801 and lower factory building columns 802 are connected by factory building brackets 803 (e.g., by welding). Generally, the upper factory building columns 801 adopt an I-shaped cross section, while the lower factory building columns 802 can adopt a round steel pipe or an I-shaped cross section. The two ends of the crane beam 101 are supported on the two factory building brackets 803 and connected to the two factory building brackets 803. The length direction of the upper chord structure 200 is parallel to the length direction of the crane beam 101. The two crane beams 101 are symmetrically distributed on both sides of the upper chord structure 200. The upper and lower flange plates of the crane beam 101 are set horizontally, and the web plate of the crane beam 101 is set vertically. The upper connecting plate 102 and the lower connecting plate 103 are both horizontal plates. The length direction of the vertical web members 302 is set vertically, and the length direction of the diagonal web members 301 is set obliquely.

[0095] The lower chord structure 100 is part of the load-bearing truss and also serves as the crane's running structure. The box-shaped section enclosed by the lower chord structure 100 ensures its own lateral stability (a characteristic of the box-shaped section itself) and prevents lateral bending. Its web members only bear axial tensile and compressive loads and do not bear out-of-plane bending loads. When the web members only bear axial tensile and compressive loads, their bearing capacity is high. The lower end of the diagonal web member 301 located at the end is connected to the lower chord structure 100. In this application, the end is a bearing type support. The diagonal web member 301 at the end transfers all the load to the end of the lower chord structure 100. The lower chord structure 100 directly acts on the shoulder beam (i.e., the corbel 803 of the factory column 800), which has a simple structure and clear force transmission. In this application, the box-shaped crane beam structure formed by the two crane beams 101, the upper connecting plate 102, and the lower connecting plate 103 is the lower chord of the truss structure, which means that the structure does not occupy the space below the crane beams 101, thus increasing the space utilization rate.

[0096] Therefore, in the crane truss structure of this application, the upper chord structure 200 and the lower chord structure 100 are connected by a web member assembly. The web member assembly connects the lower chord structure 100 and the upper chord structure 200, forming an integrated whole. The upper chord structure 200 and the web member assembly are both located above the rail surface. The entire crane truss structure can meet the requirements for large spans. Moreover, the upper chord structure 200 and the web member assembly mainly occupy the space above the rail surface, with the crane beam 101 located below the rail surface. The entire crane truss structure occupies less space below the crane rail surface, fully meeting the process layout requirements. The height of the entire crane truss structure is not limited by the clearance below the crane rail surface, allowing for a higher truss structure height, which brings significant economic advantages to the crane truss. It also solves the problem that existing ultra-large span crane beams have large cross-sectional heights, occupy a lot of lower space, and affect the air circulation inside the workshop.

[0097] Meanwhile, the two crane beams 101 in the lower chord structure 100, together with the upper connecting plate 102 and the lower connecting plate 103, form a box-shaped section, which makes the structure more stable. Compared with the existing method of directly using a closed integral box section, it is easier to operate when welding is required and can reduce hidden welds. The lower chord structure 100 of this application participates in the truss stress and also directly bears the crane travel load. Moreover, the box-shaped section formed by it can ensure that it does not bend laterally. When the web members only bear axial tensile and compressive loads, the bearing capacity is high. The entire crane truss structure is simple in construction, the stress is clear, and steel consumption is saved. In addition, the upper chord structure 200, the diagonal web members 301, the vertical web members 302, the crane beams 101, the upper connecting plate 102, and the lower connecting plate 103 can be manufactured separately in a modular fashion, which is more convenient for processing, transportation, and installation.

[0098] In the specific implementation method, the ground position h1, the rail surface elevation h2, and the roof elevation h3 are as follows: Figure 1 As shown, since the entire crane truss structure mainly occupies the space above the crane rail surface, the space occupied below the crane rail surface can be relatively small. In this application, the cross-sectional height of the crane beam 101 is ≤2.5m. Generally, a cross-sectional height of 2m-2.5m for the crane beam 101 is sufficient to meet the requirements of stress and installation.

[0099] It should be noted that the "ultra-large span" mentioned in this article refers to crane truss spans of 36m or more. Of course, the specific definition of "large span" is based on the range known in the industry.

[0100] Furthermore, refer to Figure 2 The connection node between the upper chord structure 200 and the web member assembly is used to connect the corresponding roof beam 700; or the connection node between the upper chord structure 200 and the web member assembly is used to connect the upper chord of the roof truss, and a number of vertical web members 302 are used to connect the lower chord of the roof truss.

[0101] The intersection of the upper chord structure 200 and the web members (i.e., the corresponding node structures on the upper chord structure 200) is used to connect the roof beam 700 (or to connect the upper chord of the roof truss), and can bear the roof load transmitted from the roof beam 700 (or roof truss). The roof beam 700 (or roof truss) can then serve as lateral support for the upper chord structure 200. When the upper chord structure 200 is connected to the upper chord of the roof truss, the lower chord of the roof truss can be connected to the vertical web members 302. For traditional crane beam structures that use solid web or crane truss structures that combine crane beams and trusses, which are arranged below the crane rail surface, these traditional structures require separate roof supports to bear the roof load transmitted from the roof beam 700 (or roof truss). To maintain longitudinal stability, the longitudinal force system of the factory building needs to be equipped with upper column supports and inter-column supports. In the structure of this application, the upper chord structure 200 is used to connect the upper chord of the roof beam 700 or the roof truss, and the vertical web members 302 can be used to connect the lower chord of the roof truss. The entire crane truss structure can replace part of the roof support of the factory building, and the web member assembly can replace part of the upper column support of the factory building.

[0102] In terms of stress distribution, the roof load transmitted from the roof beam 700 or roof truss is transferred to the entire structure consisting of the upper chord structure 200, the web member assembly, and the lower chord structure 100 via the various nodes on the upper chord structure 200, and then to the ground via the factory building corbels 803 and the factory building lower columns 802 at both ends. Simultaneously, the crane load transmitted from the crane is transferred to the entire structure consisting of the upper chord structure 200, the web member assembly, and the lower chord structure 100 via the crane beam 101, and then to the ground via the factory building corbels 803 and the factory building lower columns 802 at both ends, resulting in a clear stress distribution. Furthermore, this structural system integrates roof brackets and upper column supports, which can replace part of the roof brackets and upper column supports of the factory building, and the overall system has excellent load-bearing performance.

[0103] Optional, refer to Figure 1 The upper chord structure 200 includes an intermediate chord 201 and two connecting rods 202. The first end of the connecting rod 202 is connected to the corresponding end of the intermediate chord 201, and the second end of the connecting rod 202 is used to connect to the corresponding upper column 801 of the factory building. The cross-sectional area of ​​the connecting rod 202 is smaller than the cross-sectional area of ​​the intermediate chord 201.

[0104] The length of the intermediate chord 201 is less than the length of the lower chord structure 100 (i.e., the length of the crane beam 101). The length of the entire upper chord structure 200 is close to the length of the lower chord structure 100. The two ends of each connecting rod 202 are connected to the corresponding ends of the intermediate chord 201 and the corresponding upper column 801 of the factory building, respectively. The node structures in the upper chord structure 200 are located on the intermediate chord 201. The upper ends of the aforementioned diagonal web members 301 and vertical web members 302 are connected to the corresponding node structures on the intermediate chord 201. Since the upper chord end sections are generally unloaded members, the entire upper chord is composed of intermediate chord members 201 with different cross-sectional areas and two connecting rods 202, forming a variable cross-section structure, thus avoiding material waste.

[0105] Alternatively, the two ends of the diagonal web member 301 and the two ends of the vertical web member 302 may be fixed to the corresponding node structure by welding, or by high-strength bolts, or by a combination of high-strength bolts and welding.

[0106] Generally, a diagonal brace 301 is provided between two adjacent vertical brace 302, or two diagonal brace 301 are arranged in a crisscross pattern between two adjacent vertical brace 302. A diagonal brace 301 is provided between the two vertical brace 302 near both ends of the lower chord structure 100 and the corresponding ends of the lower chord structure 100, and the lower end of the diagonal brace 301 is connected to a node structure at the end of the lower chord structure 100. The ends of some vertical brace 302 are connected to the ends of two adjacent diagonal brace 301 in the same node structure, and / or the ends of some vertical brace 302 are connected to the end of one of the adjacent diagonal brace 301 in the same node structure. A number of vertical brace 302 are individually connected to a node structure. The specific connection arrangement can be determined according to the actual situation.

[0107] The number of bays in the entire crane truss structure is not limited to 4; it can also be designed with 2, 3, 5, 6, or 7 bays, etc. The number of bays is equal to the number of spans. Typical bay diagrams are shown below. Figures 23 to 26 As shown.

[0108] The upper chord structure 200 is a rod structure, which can have an I-shaped cross-section, an H-shaped cross-section, a box-shaped cross-section, or other suitable cross-sections. The diagonal web members 301 and vertical web members 302 can have H-shaped cross-sections, box-shaped cross-sections, or other suitable cross-sections. The cross-sectional shapes of the upper chord structure 200, multiple diagonal web members 301, and multiple vertical web members 302 can all be identical, or partially identical; the specific cross-sectional shapes can be determined according to actual needs. For example, when the upper chord structure 200 adopts a solid-web I-shaped or H-shaped cross-section, refer to... Figure 2 The web of the upper chord structure 200 is arranged horizontally, and the two side flanges of the upper chord structure 200 can be used to connect the upper chord of the roof beam 700 or the roof truss. When the vertical web member 302 adopts an H-shaped section, refer to... Figure 2The web of the vertical web member 302 is set vertically and perpendicular to the web of the crane beam 101. The two side flanges of the vertical web member 302 are also set vertically and can be used to connect the lower chord of the roof truss.

[0109] For example, in some embodiments, the upper chord structure 200, the diagonal web member 301, and the vertical web member 302 have an H-shaped cross section and include two flanges and one web; or, the upper chord structure 200, the diagonal web member 301, and the vertical web member 302 have a box-shaped cross section and include two flanges and two webs.

[0110] For embodiments where the diagonal web members 301 and vertical web members 302 adopt H-shaped or box-shaped cross sections, the node connections between the diagonal web members 301 and vertical web members 302 and the upper chord structure 200 and lower chord structure 100 can be achieved as follows: the node structures on the lower chord structure 100 can be divided into end node structures 600 located at the ends and middle node structures 500 located between the two ends; the node structures on the upper chord structure 200 can be upper node structures 400 located between the two ends, as follows:

[0111] Upper node structure 400:

[0112] Reference Figures 5 to 7 Multiple upper node structures 400 are provided on the upper chord structure 200. Each upper node structure 400 is connected to a corresponding vertical web member 302. Each upper node structure 400 includes two upper node vertical plates 401 arranged in parallel and spaced apart. The two upper node vertical plates 401 are connected in series in the upper chord structure 200. A horizontal web member 402 is connected between the upper parts of the two upper node vertical plates 401. The horizontal web member 402 is arranged opposite to the corresponding web member in the upper chord structure 200. An upper vertical web member 403 is also connected between the two upper node vertical plates 401 arranged opposite to each other in each upper node structure 400. The two flanges of the vertical web member 302 are respectively connected to the two upper node vertical plates 401 arranged opposite to each other in the corresponding upper node structure 400. The web member 302 is connected to the corresponding upper vertical web member 403.

[0113] In practical applications, the upper node structure 400 can be connected to only one corresponding vertical web member 302 (see reference). Figure 7 Alternatively, it can be connected to a corresponding vertical web member 302 and at least one corresponding diagonal web member 301 (see reference). Figure 5 and Figure 6 ).

[0114] When the upper node structure 400 is still connected to the diagonal web member 301, refer to Figure 5The lower part of the upper node vertical plate 401 includes a connected upper straight node vertical plate 4011 and at least one upper inclined node vertical plate 4012; an upper straight node web plate 403 is connected between two upper straight node vertical plates 4011 arranged opposite each other in the upper node structure 400, and an upper inclined node web plate 404 is connected between two upper inclined node vertical plates 4012 arranged opposite each other in the upper node structure 400; the two flange plates of the vertical web member 302 are respectively connected to the corresponding upper straight node vertical plate 4011, the two flange plates of the inclined web member 301 are respectively connected to the corresponding upper inclined node vertical plates 4012 arranged opposite each other in the upper node structure 400, and the web plate of the inclined web member 301 is connected to the corresponding upper inclined node web plate 404.

[0115] Reference Figures 5 to 7 The number of horizontal web plates 402 is the same as the number of web plates in the upper chord structure 200. For example, when the upper chord structure 200 adopts an H-shaped section, the upper chord structure 200 has one horizontally arranged web plate, and the number of horizontal web plates 402 is also one. Generally, the flange plates and web plates of the upper chord structure 200 are broken at the position of the upper node vertical plate 401. The plate surface of the upper node vertical plate 401 is vertical and aligned with the corresponding flange plate of the upper chord structure 200. The upper ends of the upper node vertical plate 401 are welded and fixed to the corresponding flange plate of the upper chord structure 200 at the broken position, and the horizontal web plates 402 are welded and fixed to the corresponding web plates of the upper chord structure 200 at the broken position.

[0116] The number of upper straight node web plates 403 is the same as the number of web plates in the vertical web members 302. The upper straight node web plates 403 are vertically arranged and perpendicular to the length direction of the crane beam 101. The upper end of the upper straight node web plate 403 is connected to the horizontal web plate 402, and the lower end of the upper straight node web plate 403 extends to the lower edge of the upper node vertical plate 401. Generally, the horizontal web plate 402 is welded and fixed to the two upper node vertical plates 401, the upper end of the upper straight node web plate 403 is welded and fixed to the horizontal web plate 402, and the upper straight node web plate 403 is welded and fixed to the upper straight node vertical plate 4011.

[0117] When the upper node structure 400 is still connected to the diagonal web member 301, refer to Figure 5 and Figure 6Generally, the upper node vertical plate 401 is integrally formed. The upper node structure 400 typically connects one or two diagonal web members 301 (the two diagonal web members 301 are symmetrically arranged on both sides of the vertical web member 302). The upper node vertical plate 401 includes an integrally formed upper straight node vertical plate 4011 and an upper diagonal node vertical plate 4012, or the upper node vertical plate 401 includes an integrally formed upper straight node vertical plate 4011 and two upper diagonal node vertical plates 4012 symmetrically distributed on both sides of the upper straight node vertical plate 4011. The number of upper diagonal node web plates 404 in the two oppositely arranged upper diagonal node vertical plates 4012 is the same as the number of web plates in the corresponding diagonal web member 301. The surface of the upper diagonal node web plate 404 is inclined, and the lower end of the upper diagonal node web plate 404 is aligned with the web plate of the corresponding diagonal web member 301. The upper end of the upper diagonal node web plate 404 can be connected to the upper side of the upper straight node web plate 403. Generally, the upper inclined node web plate 404 is welded and fixed to the upper inclined node vertical plate 4012, and the upper end of the upper inclined node web plate 404 can be welded and fixed to the upper side of the upper straight node web plate 403.

[0118] As needed, the upper node vertical plate 401 can be integrally formed with the corresponding flange plate of the connected vertical web member 302 or with the corresponding flange plates of the connected vertical web member 302 and each diagonal web member 301, resulting in better structural stability. In this case, the upper node vertical plate 401, which is integrally processed from the corresponding web member, extends as part of the flange plate of the upper chord structure 200.

[0119] Alternatively, in the upper node structure 400, the flange plate of the vertical web member 302 can be connected to the corresponding upper straight node vertical plate 4011, the web plate of the vertical web member 302 can be connected to the corresponding upper straight node web plate 403, the flange plate of the diagonal web member 301 can be connected to the corresponding upper diagonal node vertical plate 4012, and the web plate of the diagonal web member 301 can be connected to the corresponding upper diagonal node web plate 404 using different connection methods such as welding, high-strength bolt connection, high-strength bolt connection, and welding hybrid connection. Compared to the integral molding of the upper node vertical plate 401 and the flange plate of the corresponding web member, the method of separate processing and connection saves more material. The specific connection method depends on the actual needs, for example... Figure 5 and Figure 7 The upper straight node vertical plate 4011 and upper straight node web plate 403 shown in the diagram are all connected to the vertical web member 302 by welding, as are the upper inclined node vertical plate 4012 and upper inclined node web plate 404 and the corresponding inclined web member 301. For example, Figure 6 The upper straight node vertical plate 4011 and upper straight node web plate 403 shown in the figure are connected to the vertical web member 302, and the upper inclined node vertical plate 4012 and upper inclined node web plate 404 are connected to the corresponding inclined web member 301, all using friction-type high-strength bolts.

[0120] Alternatively, an upper stiffening plate 405 may be provided on the top surface of the horizontal web 402, directly opposite the upper straight node web 403, to improve structural strength. Generally, the upper stiffening plate 405 is welded and fixed to the horizontal web 402.

[0121] In practical applications, the number of upper node structures 400 connected to the upper chord structure 200 varies depending on the number of sections in the entire crane truss structure and the arrangement and connection method of the diagonal web members 301. However, generally, at least two upper node structures 400 are set between the two ends of the upper chord structure 200, and at least two upper node structures 400 need to be connected to a vertical web member 302 and at least one diagonal web member 301. It is possible to not set an upper node structure 400 that only connects to a vertical web member 302, or to set at least one upper node structure 400 that only connects to a vertical web member 302. The specific arrangement depends on the actual needs.

[0122] Specifically, two upper node structures 400 are generally set at the connection between the intermediate chord 201 and the two connecting rods 202. The upper node structure 400 connects a vertical web member 302 and at least one diagonal web member 301. The two ends of the upper node vertical plate 401 of the upper node structure 400 are welded and fixed to the corresponding flange plates of the intermediate chord 201 and the corresponding flange plates of the connecting rods 202, respectively. Between the two ends of the intermediate chord 201, there may be no upper node structure 400 connecting only one vertical web member 302, or at least one set of upper node structures 400 connecting only one vertical web member 302 may be set.

[0123] Central node structure 500:

[0124] Reference Figures 8 to 13 as well as Figures 30 to 38 Multiple intermediate node structures 500 are provided on the lower chord structure 100. Each intermediate node structure 500 is connected to a corresponding vertical web member 302. Each intermediate node structure 500 includes two intermediate node vertical plates 501 arranged in parallel and spaced apart. The two intermediate node vertical plates 501 are connected to two crane beams 101 through intermediate connecting components. A lower straight node web member 502 is connected between the two intermediate node vertical plates 501 arranged opposite each other in each intermediate node structure 500. The two flanges of the vertical web member 302 are respectively connected to the two intermediate node vertical plates 501 arranged opposite each other in the corresponding intermediate node structure 500. The web member 302 is connected to the corresponding lower straight node web member 502.

[0125] In practical applications, the central node structure 500 can be connected to only one corresponding vertical web member 302 (see reference). Figures 8 to 10 as well as Figures 30 to 32 Alternatively, it can be connected to a corresponding vertical web member 302 and at least one corresponding diagonal web member 301 (see reference). Figures 11 to 13 as well as Figures 33 to 38 ).

[0126] When the central node structure 500 is also connected to the diagonal web member 301, refer to Figures 11 to 13 The central node vertical plate 501 includes a lower straight node vertical plate 5011 and at least one first lower inclined node vertical plate 5012 connected to each other; a lower straight node web plate 502 is connected between the two lower straight node vertical plates 5011 arranged opposite each other in the central node structure 500, and a first lower inclined node web plate 503 is connected between the two first lower inclined node vertical plates 5012 arranged opposite each other in the central node structure 500; the two flange plates of the vertical web member 302 are respectively connected to the corresponding lower straight node vertical plate 5011, the two flange plates of the inclined web member 301 are respectively connected to the two first lower inclined node vertical plates 5012 arranged opposite each other in the central node structure 500, and the web plate of the inclined web member 301 is connected to the corresponding first lower inclined node web plate 503.

[0127] The surface of the middle node vertical plate 501 is vertical and parallel to the length direction of the crane beam 101. The surface of the lower straight node web plate 502 is vertical and perpendicular to the length direction of the crane beam 101. The number of lower straight node web plates 502 is the same as the number of web plates in the vertical web members 302. The number of first lower inclined node web plates 503 in the two oppositely arranged first lower inclined node vertical plates 5012 is the same as the number of web plates in the corresponding inclined web members 301. Generally, the lower straight node web plates 502 are welded and fixed to the lower straight node vertical plates 5011.

[0128] When the central node structure 500 is also connected to the diagonal web members 301, the various parts of the central node vertical plate 501 are generally integrally formed. Typically, the central node structure 500 can connect one diagonal web member 301 or two diagonal web members 301 (the two diagonal web members 301 are symmetrically arranged on both sides of the vertical web member 302). The central node vertical plate 501 includes an integrally formed lower straight node vertical plate 5011 and a first lower diagonal node vertical plate 5012, or the central node vertical plate 501 includes an integrally formed lower straight node vertical plate 5011 and two first lower diagonal node vertical plates 5012 symmetrically distributed on both sides of the lower straight node vertical plate 5011. The surface of the first lower diagonal node web plate 503 is inclined, and the upper end of the first lower diagonal node web plate 503 is aligned with the web plate of the corresponding diagonal web member 301. Generally, the first lower diagonal node web plate 503 is welded and fixed to the first lower diagonal node vertical plate 5012.

[0129] As needed, the central node vertical plate 501 can be integrally formed with the corresponding flange plate of the connected vertical web member 302 or with the corresponding flange plate of the connected vertical web member 302 and each diagonal web member 301, resulting in better structural stability.

[0130] Alternatively, different connection methods can be used between the two lower straight node vertical plates 5011 and the two flange plates of the vertical web member 302, between the lower straight node web plate 502 and the web plate of the vertical web member 302, between the two oppositely arranged first lower oblique node vertical plates 5012 and the two flange plates of the corresponding oblique web member 301, and between the first lower oblique node web plate 503 and the web plate of the corresponding oblique web member 301. These methods include welding, high-strength bolt connection, high-strength bolt connection, and a combination of welding and bolting. Compared to the integral molding of the middle node vertical plate 501 with the flange plates of the vertical web member 302 and the oblique web member 301, the method of separate processing and connection saves more material. The specific connection method depends on the actual needs.

[0131] For example Figures 8 to 13 as well as Figures 30 to 35 The lower straight node vertical plate 5011 and lower straight node web plate 502 shown in the figure are all connected to the vertical web member 302 by welding, as are the first lower inclined node vertical plate 5012 and first lower inclined node web plate 503 and the corresponding inclined web member 301.

[0132] For example, Figure 36 In the central node structure 500 shown, the central node vertical plate 501 is connected to the vertical web member 302 and the diagonal web member 301 using friction-type high-strength bolts. Specifically, taking the connection between the central node structure 500 and the vertical web member 302 as an example, two web plate splicing plates 507 are provided on both sides of the web of the vertical web member 302. An outer flange splicing plate 508 and an inner flange splicing plate 509 are provided on the outer and inner sides of the flange plate of the vertical web member 302. The upper and lower parts of the web plate splicing plate 507 respectively cover the web of the vertical web member 302 and the lower straight node web member 502. The upper and lower parts of the outer flange splicing plate 508 respectively cover... The outer surface of the flange plate of the vertical web member 302 and the outer surface of the lower straight node vertical plate 5011, the upper and lower parts of the inner flange splicing plate 509 respectively cover the inner surface of the flange plate of the vertical web member 302 and the inner surface of the lower straight node vertical plate 5011; the two web splicing plates 507 and the web plate of the vertical web member 302, the two web splicing plates 507 and the lower straight node web plate 502, the outer flange splicing plate 508 and the flange plate and inner flange splicing plate 509 of the vertical web member 302, and the outer flange splicing plate 508 and the lower straight node vertical plate 5011 and inner flange splicing plate 509 are all connected by friction-type high-strength bolts.

[0133] Furthermore, to facilitate the connection between the central node vertical plate 501 and the crane beam 101, the central connecting assembly includes a first upper flange plate 504 connected between the upper flange plates of the two crane beams 101 and a first lower flange plate 505 connected between the lower flange plates of the two crane beams 101. At least one first partition plate 506 is connected between the first upper flange plate 504 and the first lower flange plate 505. The central node vertical plate 501 passes through the first upper flange plate 504 into the space between the two crane beams 101 and is connected to the first upper flange plate 504, the first lower flange plate 505 and the first partition plate 506.

[0134] The upper flange plate of the crane beam 101 and the upper connecting plate 102, as well as the lower flange plate of the crane beam 101 and the lower connecting plate 103, can be connected by different methods such as welding, high-strength bolt connection, high-strength bolt connection and welding hybrid connection.

[0135] Preferably, the upper flange plate and upper connecting plate 102 of the crane beam 101, as well as the lower flange plate and lower connecting plate 103 of the crane beam 101, are connected by high-strength bolts, resulting in better fatigue strength performance. Specifically, both the upper connecting plate 102 and the lower connecting plate 103 are rectangular plates, the width of which along the width direction of the crane beam 101 is greater than the distance between the upper flange plates of the two crane beams 101. The two sides of the upper connecting plate 102 in the width direction cover the upper surface of the upper flange plates of the two crane beams 101 and are connected by high-strength bolts; the two sides of the lower connecting plate 103 in the width direction cover the lower surface of the lower flange plates of the two crane beams 101 and are connected by high-strength bolts.

[0136] The upper part of the middle node vertical plate 501 is located above the first upper wing connecting plate 504, and the lower part of the middle node vertical plate 501 extends into the space between the two crane beams 101 through the first upper wing connecting plate 504. Generally, the upper end of the lower straight node web plate 502 extends to the upper edge of the lower straight node vertical plate 5011 and is aligned with the corresponding web of the vertical web member 302, and the lower end extends to the upper surface of the first upper wing connecting plate 504. The lower end of the lower straight node web plate 502 can be welded to the upper surface of the first upper wing connecting plate 504. The lower end of the aforementioned first lower inclined node web plate 503 can also extend to the upper surface of the first upper wing connecting plate 504 and be welded to the upper surface of the first upper wing connecting plate 504.

[0137] Both the first upper flange plate 504 and the first lower flange plate 505 are rectangular plates with horizontally arranged surfaces. The thicknesses of the upper and lower flange plates of the crane beam 101, as well as the thicknesses of the first upper flange plate 504 and the first lower flange plate 505, are the same. The first upper flange plate 504 is positioned between the two corresponding upper flange plates of the two crane beams 101, and all three are aligned in the same horizontal plane. The first lower flange plate 505 is positioned between the two corresponding lower flange plates of the two crane beams 101, and all three are aligned in the same horizontal plane. The first partition plate 506 is a rectangular plate with a vertically arranged surface, and its surface is perpendicular to the web of the crane beam 101.

[0138] The number of the first partition 506 can be determined according to actual needs. For example, in one example, refer to Figures 8 to 13 A first partition plate 506 is provided between the first upper wing connecting plate 504 and the first lower wing connecting plate 505. A first lower opening groove is provided on the middle node vertical plate 501. The first partition plate 506 is inserted into the first lower opening groove. In this example, the part of the middle node vertical plate 501 located below the second upper wing connecting plate 603 can be an isosceles trapezoidal plate with a larger upper part and a smaller lower part. A first lower opening groove is provided in the middle of the isosceles trapezoidal plate. The length direction of the first lower opening groove is arranged in the vertical direction. The first partition plate 506 can be inserted through the first opening groove. The two can be welded together by a section.

[0139] For example, in another example, refer to Figures 30 to 36 Two first partition plates 506 are provided between the first upper wing connecting plate 504 and the first lower wing connecting plate 505. The two sides of the middle node vertical plate 501 are respectively connected to the two first partition plates 506. In this example, the two first partition plates 506 are arranged at intervals along the length direction of the crane beam 101. The part of the middle node vertical plate 501 located below the first upper wing connecting plate 504 is a rectangular plate 1043. The two ends of the rectangular plate 1043 along the length direction of the crane beam 101 are respectively connected to the two first partition plates 506.

[0140] The connections between the first upper wing plate 504 and the upper connecting plate 102, between the first lower wing plate 505 and the lower connecting plate 103, between the first upper wing plate 504 and the upper flange plates of the two crane beams 101, between the first lower wing plate 505 and the lower flange plates of the two crane beams 101, between the first partition plate 506 and the two crane beams 101, and between the middle node vertical plate 501 and the first partition plate 506, the first upper wing plate 504 and the first lower wing plate 505, can be made using different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding hybrid connection. The specific connection method depends on the actual needs.

[0141] Taking into account processing, installation, and structural stability, as a preferred example, the first upper wing plate 504 is connected to the upper connecting plate 102 by high-strength bolts, and the first lower wing plate 505 is connected to the lower connecting plate 103 by high-strength bolts, which can reduce the amount of welding and improve fatigue strength. The first upper flange plate 504 is welded to the upper flange plates of the two crane beams 101, and the first lower flange plate 505 is welded to the lower flange plates of the two crane beams 101. The top and bottom ends of the first partition plate 506 are welded to the upper and lower flange plates of the two crane beams 101, respectively, and the two sides of the first partition plate 506 are welded to the web plates of the two crane beams 101, respectively. Two first opening slots are opened on the first upper flange plate 504 (the first opening slots are also elongated openings, and the length direction of the first opening slots is parallel to the length direction of the crane beams 101). The middle node vertical plate 501 can pass through the corresponding first opening slots. The middle node vertical plate 501 is welded to the first upper flange plate 504, the first lower flange plate 505, and the first partition plate 506. Welding is used in these places to make the connection more convenient.

[0142] In this example, the corresponding ends of the upper connecting plate 102 cover the upper surface of the first upper flange plate 504 and are connected by high-strength bolts; the two sides of the lower connecting plate 103 in the width direction abut against the lower surfaces of the lower flange plates of the two crane beams 101, and the corresponding ends of the lower connecting plate 103 abut against the lower surface of the first lower flange plate 505 and are connected by high-strength bolts. Generally, the width of the first opening slot is slightly larger than the thickness of the lower combined node plate; when there is only one first partition plate 506, the width of the first lower opening slot is slightly larger than the thickness of the first partition plate 506; when there are two first partition plates 506, there are gaps between the lower sides of the middle node vertical plate 501 and the two first partition plates 506; there are gaps between the bottom of the middle node vertical plate 501 and the first lower wing connecting plate 505; the middle node vertical plate 501 and the first upper wing connecting plate 504, the middle node vertical plate 501 and the first partition plate 506, and the bottom of the middle node vertical plate 501 and the first lower wing connecting plate 505 are all welded with a slit.

[0143] Alternatively, a central stiffening plate 1012 may be provided on the outer side of the web of each crane beam 101, directly opposite the first diaphragm 506, to improve structural strength and load-bearing capacity.

[0144] End node structure 600:

[0145] Reference Figures 14 to 16 as well as Figures 39 to 41Two end node structures 600 are provided at both ends of the lower chord structure 100. Each end node structure 600 is connected to a corresponding diagonal web member 301. Each end node structure 600 includes two parallel and spaced second lower diagonal node vertical plates 601. The two second lower diagonal node vertical plates 601 are connected to two crane beams 101 through end connection components. A second lower diagonal node web plate 602 is connected between the two second lower diagonal node vertical plates 601. The two flange plates of the diagonal web member 301 are respectively connected to the two oppositely arranged second lower diagonal node vertical plates 601 in the corresponding end node structure 600. The web plate of the diagonal web member 301 is connected to the corresponding second lower diagonal node web plate 602.

[0146] The number of web plates 602 in the second lower inclined node is the same as the number of web plates in the inclined web member 301. Generally, the web plates 602 in the second lower inclined node are welded to the vertical plates 601 in the second lower inclined node. Depending on the needs, the vertical plates 601 in the second lower inclined node can be formed by extending downwards from the corresponding flange plates of the inclined web member 301. During processing, the vertical plates 601 in the second lower inclined node and the flange plates of the inclined web member 301 are integrally formed, resulting in better structural stability. Alternatively, different connection methods can be used between the two vertical plates 601 in the second lower inclined node and the two flange plates of the inclined web member 301, and between the web plates 602 in the second lower inclined node and the web plates of the inclined web member 301, such as welding, high-strength bolt connection, high-strength bolt connection, and a combination of welding. Compared to integrally forming the vertical plates 601 in the second lower inclined node and the flange plates of the inclined web member 301, separate processing and connection methods save more material. The specific connection method depends on actual needs, for example... Figures 14 to 16 as well as Figures 39 to 41 The second lower inclined node vertical plate 601 and the second lower inclined node web plate 602 shown in the figure are all connected to the inclined web member 301 by welding.

[0147] Furthermore, to facilitate the connection between the second lower inclined node vertical plate 601 and the crane beam 101, the end connection assembly includes a second upper flange plate 603 connected between the upper flange plates of the two crane beams 101 and a second lower flange plate 604 connected between the lower flange plates of the two crane beams 101. At least one second partition plate 605 is connected between the second upper flange plate 603 and the second lower flange plate 604. The second lower inclined node vertical plate 601 passes through the second upper flange plate 603 into the space between the two crane beams 101 and is connected to the second upper flange plate 603, the second lower flange plate 604 and the second partition plate 605.

[0148] The upper part of the second lower inclined node vertical plate 601 is located above the second upper flange plate 603, and the lower part of the second lower inclined node vertical plate 601 extends through the second upper flange plate 603 into the space between the two crane beams 101. Both the second upper flange plate 603 and the second lower flange plate 604 are rectangular plates with horizontally arranged surfaces. The thicknesses of the upper and lower flange plates of the crane beams 101, as well as the thicknesses of the second upper flange plate 603 and the second lower flange plate 604, are the same. The second upper flange plate 603 is positioned between the two corresponding upper flange plates of the two crane beams 101, and all three are aligned on the same horizontal plane. The second lower flange plate 604 is positioned between the two corresponding lower flange plates of the two crane beams 101, and all three are aligned on the same horizontal plane. The second partition plate 605 is a rectangular plate with a vertically arranged surface, and its surface is perpendicular to the web of the crane beam 101.

[0149] The number of second partitions 605 can be determined according to actual needs. For example, in one case, the scream... Figures 14 to 16 A second partition 605 is provided between the second upper wing connecting plate 603 and the second lower wing connecting plate 604, and one side profile of the second lower inclined node vertical plate 601 is connected to the second partition 605; in this example, the part of the second lower inclined node vertical plate 601 located below the second upper wing connecting plate 603 can be an inverted right-angled trapezoidal plate with a larger upper part and a smaller lower part, and the straight edge of the inverted right-angled trapezoidal plate is connected to the second partition 605.

[0150] For example, in another example, refer to Figures 39 to 41 Two second partition plates 605 are spaced apart between the second upper wing connecting plate 603 and the second lower wing connecting plate 604. The two sides of the second lower inclined node vertical plate 601 are connected to the two second partition plates 605 respectively. In this example, the two second partition plates 605 are arranged spaced apart along the length of the crane beam 101. The portion of the second lower inclined node vertical plate 601 below the second upper wing connecting plate 603 is a rectangular plate 1043, and both ends of this rectangular plate 1043 are connected to the two second partition plates 605 respectively along the length of the crane beam 101. In both examples, the portion of the second lower inclined node vertical plate 601 above the second wing connecting plate can be an inclined plate. This inclined plate is arranged inclined upwards from the end of the crane beam 101 towards the middle, and the second lower inclined node web plate 602 connects between the two inclined plates.

[0151] The connections between the second upper wing plate 603 and the upper connecting plate 102, between the second lower wing plate 604 and the lower connecting plate 103, between the second upper wing plate 603 and the upper flange plates of the two crane beams 101, between the second lower wing plate 604 and the lower flange plates of the two crane beams 101, between the second partition plate 605 and the two crane beams 101, and between the second lower inclined node vertical plate 601 and the second partition plate 605, the second upper wing plate 603 and the second lower wing plate 604, can be made using different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding hybrid connection. The specific connection method depends on the actual needs.

[0152] Taking into account processing, installation, and structural stability, as a preferred example, the second upper wing plate 603 is connected to the upper connecting plate 102 by high-strength bolts, and the second lower wing plate 604 is connected to the lower connecting plate 103 by high-strength bolts, which can reduce the amount of welding and improve fatigue resistance. The second upper flange plate 603 is welded to the upper flange plates of the two crane beams 101, and the second lower flange plate 604 is welded to the lower flange plates of the two crane beams 101. The top and bottom ends of the second partition plate 605 are welded to the upper and lower flange plates of the two crane beams 101, respectively, and the two sides of the second partition plate 605 are welded to the web plates of the two crane beams 101, respectively. Two second opening slots are provided on the second upper flange plate 603 (the second opening slots are also elongated openings, and the length direction of the second opening slots is parallel to the length direction of the crane beams 101). The second lower inclined node vertical plate 601 can pass through the corresponding second opening slots. The second lower inclined node vertical plate 601 is welded to the second upper flange plate 603, the second lower flange plate 604, and the second partition plate 605. Welding at these locations makes the connection more convenient.

[0153] In this example, the corresponding ends of the upper connecting plate 102 cover the upper surface of the second upper wing plate 603 and are connected by high-strength bolts; the two sides of the lower connecting plate 103 in the width direction abut against the lower surfaces of the lower flange plates of the two crane beams 101, and the corresponding ends of the lower connecting plate 103 abut against the lower surface of the second lower wing plate 604 and are connected by high-strength bolts. Generally, the width of the second opening slot is slightly larger than the thickness of the second lower inclined node vertical plate 601. There are gaps between the corresponding lower side of the second lower inclined node vertical plate 601 and the second partition plate 605, and between the bottom of the second lower inclined node vertical plate 601 and the second lower wing plate 604. The second lower inclined node vertical plate 601 and the second upper wing plate 603, the lower side of the second lower inclined node vertical plate 601 and the second partition plate 605, and the bottom of the second lower inclined node vertical plate 601 and the second lower wing plate 604 are all welded with slits.

[0154] Alternatively, a support stiffening plate 1013 is provided on both sides of the web of each crane beam 101 at the position corresponding to the factory building bracket 803, and an end stiffening plate 1014 is also provided on the outer side of the web of each crane beam 101 directly opposite the second partition 605, in order to improve the structural strength and load-bearing capacity.

[0155] In practical applications, the number of intermediate node structures 500 connected to the lower chord structure 100 varies depending on the number of sections in the entire crane truss structure and the arrangement and connection method of the diagonal web members 301. Generally, two end node structures 600 are set at both ends of the lower chord structure 100, and at least two intermediate node structures 500 are set between the two ends of the lower chord structure 100. At least one intermediate node structure 500 needs to connect the lower end of a vertical web member 302 and the lower end of at least one diagonal web member 301. It is possible to not set an intermediate node structure 500 that only connects to a vertical web member 302, or to set at least one intermediate node structure 500 that only connects to a vertical web member 302. The specific arrangement depends on the actual needs.

[0156] Further optionally, to further improve the stability of the box-shaped cross-section structure formed by the two crane beams 101, the upper connecting plate 102, and the lower connecting plate 103, refer to Figures 17 to 20 Multiple intermediate plates 104 are provided between the two crane beams 101. A maintenance manhole 1041 is provided in the middle of the intermediate plate 104. The intermediate plate 104 is connected to the upper connecting plate 102, the lower connecting plate 103 and the web of the two crane beams 101.

[0157] The intermediate plate 104 is located between two adjacent node structures in the lower chord structure 100. The surface of the intermediate plate 104 is perpendicular to the web of the crane beam 101. Since the entire lower chord structure 100 is a box-shaped section formed by two continuous crane beams 101, an upper connecting plate 102, and a lower connecting plate 103, the placement of multiple intermediate plates 104 at intervals along the length of the two crane beams 101 improves the overall integrity and stiffness of the lower chord structure 100, preventing deformation. The opening of the maintenance manhole 1041 facilitates maintenance operations for personnel.

[0158] Alternatively, an annular reinforcing plate 1042 may be provided on the wall of the manhole 1041. The axial direction of the reinforcing plate 1042 is parallel to the length direction of the crane beam 101, and the reinforcing plate 1042 can reinforce the position of the manhole 1041.

[0159] Optionally, to facilitate the connection between the intermediate plate 104 and the crane beam 101, the upper connecting plate 102, and the lower connecting plate 103, the intermediate plate 104 includes a rectangular plate 1043, an upper T-shaped plate 1044, and a lower T-shaped plate 1045, which can be integrally formed. Both the upper T-shaped plate 1044 and the lower T-shaped plate 1045 include a horizontal plate and a vertical plate. The upper T-shaped plate 1044 is located at the top of the rectangular plate 1043, and its vertical plate is directly connected to the rectangular plate 1043. Its horizontal plate abuts against the lower surface of the corresponding upper connecting plate 102 and is connected to the upper connecting plate 102 by high-strength bolts. The lower T-shaped plate 1045 is located at the bottom of the rectangular plate 1043, and its vertical plate is directly connected to the rectangular plate 1043. Its horizontal plate abuts against the upper surface of the corresponding lower connecting plate 103 and is connected to the lower connecting plate 103 by high-strength bolts. The end side of the rectangular plate 1043 is welded and fixed to the web of the corresponding crane beam 101, and the upper and lower edges of the end of the rectangular plate 1043 are welded and fixed to the upper and lower flange plates of the corresponding crane beam 101. In specific installation, generally, gaps are left between the end side, upper edge, and lower edge of the rectangular plate 1043 of the intermediate plate 104 and the web, upper flange plate, and lower flange plate of the corresponding crane beam 101, respectively, and then these three places are welded with slits.

[0160] Alternatively, an outer stiffening plate 1015 may be provided on the outer side of the web of the crane beam 101, directly opposite the intermediate plate 104, to further improve the stability of the lower chord structure 100.

[0161] Alternatively, the thickness of the upper connecting plate 102 is less than the thickness of the upper flange plate of the crane beam 101, and the thickness of the lower connecting plate 103 is less than the thickness of the lower flange plate of the crane beam 101.

[0162] Both the upper connecting plate 102 and the lower connecting plate 103 are rectangular plates, arranged along the length of the crane beam 101. Multiple upper connecting plates 102 are spaced apart along the length of the crane beam 101, and multiple lower connecting plates 103 are spaced apart along the length of the crane beam 101. Generally, the upper and lower flange plates of the crane beam 101 have the same thickness, and the upper connecting plates 102 and lower connecting plates 103 have the same thickness, both made of thin steel plates, approximately half the thickness of the upper flange plate of the crane beam 101. Generally, the thickness of the upper and lower flange plates of the crane beam 101 is 20mm-30mm, and the thickness of the upper connecting plates 102 and lower connecting plates 103 is 10mm-15mm.

[0163] From a stress analysis perspective, the plates closer to each node structure contribute more to the strength of the component, while the upper connecting plate 102 and the lower connecting plate 103 are located between two adjacent node structures and contribute less to the strength of the component. Therefore, both the upper connecting plate 102 and the lower connecting plate 103 are made of thin plates, which can reduce the amount of steel used and reduce material waste.

[0164] In summary, the crane truss structure of this embodiment is an ultra-large span crane truss structure. It utilizes two crane beams 101 as the lower chord structure 100, the upper chord structure 200 to replace part of the roof support of the factory building, and the web member components to replace part of the upper column support of the factory building, forming a three-in-one system of lower chord crane beams, upper chord support, and web members. The lower chord structure 100 uses parallel double-piece crane beams 101, which are connected to each web member using corresponding node structures. The end node structure 600 on the lower chord structure 100 connects the end diagonal web members 301 to the lower chord structure 100; the lower combined node structure and lower single node structure on the lower chord structure 100 connect the remaining diagonal web members 301 and vertical web members 302 to the crane beams 101; and the node structures on the upper chord structure 200 connect the diagonal web members 301 and vertical web members 302 to the upper chord structure 200. The two crane beams 101 in the lower chord structure 100 and the thin steel plates of the upper and lower flanges of the crane beams 101 form a box section. The web members of the ultra-large span crane truss are connected to the upper chord structure 200 and the lower chord structure 100 by welding or high-strength bolts, which can realize modular fabrication and installation.

[0165] When the lower chord structure 100 of this application is connected to the web members, the flanges of the web members extend to form corresponding node vertical plates, or the flanges of the web members are welded to the corresponding node vertical plates. The node vertical plates are connected to the corresponding partition plates, and the partition plates are then connected to the crane beams 101 on both sides, thus realizing the connection between the web members and the crane beams 101. In the lower chord structure 100 of this application, the I-shaped crane beams 101 and the web members can be fabricated separately and assembled on site using high-strength bolts, which facilitates transportation and assembly. The flanges of the crane beams 101 of this application are connected to the thin steel plates using high-strength bolts, which facilitates transportation and splicing. Since this structure is mainly used for crane movement, its movement structure will inevitably have fatigue problems, and the fatigue resistance of high-strength bolt connections is far superior to that of welded connections.

[0166] The entire structure is suitable for crane beams with ultra-large spans (101) in industrial plants after column removal. This system integrates roof brackets, upper column supports, and the crane beam system, offering advantages such as simple construction, clear stress distribution, excellent fatigue resistance, reduced steel consumption, and a clean and aesthetically pleasing appearance. Comparative analysis shows that it saves over 30% of steel compared to existing solid-web crane beams, demonstrating significant economic advantages. Furthermore, the system allows for modular fabrication, facilitating transportation and installation. Its market application value is further enhanced when high-strength bolts are used for connections. It also solves the problem that existing crane truss spans generally do not exceed 36m and addresses the issue of existing crane trusses occupying excessive space below the crane rail (1011). The entire structure is suitable for spans exceeding 36m, such as 50m or 60m, and is also applicable to spans less than 36m.

[0167] It should be noted that "multiple" in this article refers to at least two, and "ultra-large span" in this article refers to crane truss spans of 36m or more. Of course, the specific definition of "large span" is based on the range known in the industry.

[0168] The above are merely illustrative embodiments of this utility model and are not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A crane truss structure with parallel lower chords of the crane beam, characterized in that, include: The lower chord structure (100) includes two parallel and spaced crane beams (101), each crane beam (101) having an I-shaped cross section. Multiple upper connecting plates (102) are connected between the upper flanges of the two crane beams (101), and multiple lower connecting plates (103) are connected between the lower flanges of the two crane beams (101). The top surface of the upper flange of the crane beam (101) is used to install crane rails (1011), and both ends of the crane beam (101) are used to connect corresponding factory building brackets (803). The upper chord structure (200) is located above the lower chord structure (100); The web member assembly includes a plurality of diagonal web members (301) and a plurality of vertical web members (302) connected between the upper chord structure (200) and the lower chord structure (100). Both the upper chord structure (200) and the lower chord structure (100) are provided with a plurality of node structures. The two ends of the diagonal web members (301) are connected to the corresponding node structures, and the two ends of the vertical web members (302) are connected to the corresponding node structures.

2. The crane truss structure with a parallel crane beam as the lower chord as described in claim 1, characterized in that, The cross-sectional height of the crane beam (101) is ≤2.5m.

3. The crane truss structure with a parallel crane beam as the lower chord as described in claim 1, characterized in that, The upper chord structure (200), the diagonal web member (301), and the vertical web member (302) have H-shaped or box-shaped cross sections. The upper chord structure (200), the diagonal web member (301), and the vertical web member (302) each include two flanges and one or two webs.

4. The crane truss structure with a parallel crane beam as the lower chord as described in claim 3, characterized in that, The lower chord structure (100) is provided with a plurality of central node structures (500), each central node structure (500) is connected to a corresponding vertical web member (302), and each central node structure (500) includes two central node vertical plates (501) arranged in parallel and spaced apart, and the two central node vertical plates (501) are connected to the two crane beams (101) through a central connecting assembly; In each of the central node structures (500), a lower straight node web plate (502) is connected between two central node vertical plates (501) arranged opposite to each other. The two flange plates of the vertical web member (302) are respectively connected to the two central node vertical plates (501) arranged opposite to each other in the corresponding central node structure (500), and the web plate of the vertical web member (302) is connected to the corresponding lower straight node web plate (502).

5. The crane truss structure with a parallel crane beam as the lower chord as described in claim 4, characterized in that, The central node structure (500) is also connected to at least one corresponding diagonal brace (301), and the central node vertical plate (501) includes a lower straight node vertical plate (5011) and at least one first lower diagonal node vertical plate (5012) connected to each other. The two lower straight node vertical plates (5011) arranged opposite to each other in the central node structure (500) are connected by a lower straight node web plate (502), and the two first lower inclined node vertical plates (5012) arranged opposite to each other in the central node structure (500) are connected by a first lower inclined node web plate (503); the two flange plates of the vertical web member (302) are respectively connected to the corresponding lower straight node vertical plates (5011), the two flange plates of the inclined web member (301) are respectively connected to the two first lower inclined node vertical plates (5012) arranged opposite to each other in the central node structure (500), and the web plate of the inclined web member (301) is connected to the corresponding first lower inclined node web plate (503).

6. The crane truss structure with a parallel crane beam as the lower chord as described in claim 4, characterized in that, The central connecting assembly includes a first upper flange plate (504) connected between the upper flange plates of the two crane beams (101) and a first lower flange plate (505) connected between the lower flange plates of the two crane beams (101). At least one first partition plate (506) is connected between the first upper flange plate (504) and the first lower flange plate (505). The central node vertical plate (501) passes through the first upper flange plate (504) into the space between the two crane beams (101) and is connected to the first upper flange plate (504), the first lower flange plate (505) and the first partition plate (506).

7. The crane truss structure with a parallel crane beam as the lower chord as described in claim 6, characterized in that, A first partition plate (506) is provided between the first upper wing connecting plate (504) and the first lower wing connecting plate (505). A first lower opening groove is provided on the middle node vertical plate (501), and the first partition plate (506) is inserted into the first lower opening groove; or Two first partition plates (506) are provided between the first upper wing connecting plate (504) and the first lower wing connecting plate (505), and the two sides of the middle node vertical plate (501) are respectively connected to the two first partition plates (506).

8. The crane truss structure with a parallel crane beam as the lower chord as described in claim 6, characterized in that, The first upper wing plate (504) is connected to the upper connecting plate (102) by high-strength bolts, the first lower wing plate (505) and the lower connecting plate (103) are connected by high-strength bolts, the first upper wing plate (504) is welded to the upper flange plates of the two crane beams (101), and the first lower wing plate (505) is welded to the lower flange plates of the two crane beams (101). The first partition plate (506) is perpendicular to the web of the crane beam (101). The top and bottom ends of the first partition plate (506) are welded to the upper and lower flanges of the two crane beams (101), respectively. The two sides of the first partition plate (506) are welded to the webs of the two crane beams (101), respectively. Two first opening slots are provided on the first upper flange plate (504). The middle node vertical plate (501) can pass through the corresponding first opening slot. The middle node vertical plate (501) is welded to the first upper flange plate (504), the first lower flange plate (505), and the first partition plate (506).

9. The crane truss structure with a parallel crane beam as the lower chord as described in claim 3, characterized in that, Two end node structures (600) are provided at both ends of the lower chord structure (100), and each end node structure (600) is connected to a corresponding diagonal web member (301). Each end node structure (600) includes two parallel and spaced second lower diagonal node vertical plates (601), which are connected to two crane beams (101) through end connection components. A second lower diagonal node web member (602) is connected between the two second lower diagonal node vertical plates (601). The two flanges of the diagonal web member (301) are respectively connected to the two oppositely arranged second lower diagonal node vertical plates (601) in the corresponding end node structure (600), and the web member (301) is connected to the corresponding second lower diagonal node web member (602).

10. The crane truss structure with a parallel crane beam as the lower chord as described in claim 9, characterized in that, The end connection assembly includes a second upper flange plate (603) connected between the upper flange plates of the two crane beams (101) and a second lower flange plate (604) connected between the lower flange plates of the two crane beams (101). At least one second partition plate (605) is connected between the second upper flange plate (603) and the second lower flange plate (604). The second lower inclined node vertical plate (601) passes through the second upper flange plate (603) into the space between the two crane beams (101) and is connected to the second upper flange plate (603), the second lower flange plate (604) and the second partition plate (605).

11. The crane truss structure with a parallel crane beam as the lower chord as described in claim 10, characterized in that, A second partition (605) is provided between the second upper wing connecting plate (603) and the second lower wing connecting plate (604), and one side profile of the second lower inclined node vertical plate (601) is connected to the second partition (605); or Two second partition plates (605) are provided between the second upper wing connecting plate (603) and the second lower wing connecting plate (604), and the two sides of the second lower inclined node vertical plate (601) are respectively connected to the two second partition plates (605).

12. The crane truss structure with a parallel crane beam as the lower chord as described in claim 10, characterized in that, The second upper wing plate (603) is connected to the upper connecting plate (102) by high-strength bolts, the second lower wing plate (604) and the lower connecting plate (103) are connected by high-strength bolts, the second upper wing plate (603) is welded to the upper flange plates of the two crane beams (101), and the second lower wing plate (604) is welded to the lower flange plates of the two crane beams (101); The surface of the second partition plate (605) is perpendicular to the web of the crane beam (101). The top and bottom ends of the second partition plate (605) are welded to the upper and lower flanges of the two crane beams (101), respectively. The two sides of the second partition plate (605) are welded to the webs of the two crane beams (101), respectively. Two second opening slots are provided on the second upper flange plate (603). The second lower inclined node vertical plate (601) can pass through the corresponding second opening slot. The second lower inclined node vertical plate (601) is welded to the second upper flange plate (603), the second lower flange plate (604), and the second partition plate (605).

13. The crane truss structure with a parallel crane beam as the lower chord as described in claim 1, characterized in that, A plurality of intermediate plates (104) are provided between the two crane beams (101), and a maintenance manhole (1041) is provided in the middle of the intermediate plate (104). The intermediate plate (104) is connected to the upper connecting plate (102), the lower connecting plate (103) and the web of the two crane beams (101).

14. The crane truss structure with a parallel crane beam as the lower chord as described in claim 13, characterized in that, An annular reinforcing plate (1042) is also provided on the wall of the maintenance manhole (1041).

15. The crane truss structure with a parallel crane beam as the lower chord as described in claim 1, characterized in that, The connection node between the upper chord structure (200) and the web member assembly is used to connect the corresponding roof beam (700); or the connection node between the upper chord structure (200) and the web member assembly is used to connect the upper chord of the roof truss, and a portion of the vertical web members (302) are used to connect the lower chord of the roof truss.

16. The crane truss structure with a parallel crane beam as the lower chord as described in claim 1, characterized in that, The upper chord structure (200) includes an intermediate chord (201) and two connecting rods (202). The first end of the connecting rod (202) is connected to the corresponding end of the intermediate chord (201), and the second end of the connecting rod (202) is used to connect to the corresponding upper column (801) of the factory building. The cross-sectional area of ​​the connecting rod (202) is smaller than that of the intermediate chord (201).

17. The crane truss structure with a parallel crane beam as the lower chord as described in claim 3, characterized in that, The upper chord structure (200) is provided with a plurality of upper node structures (400), each upper node structure (400) being connected to a corresponding vertical web member (302); each upper node structure (400) includes two upper node vertical plates (401) arranged in parallel and spaced apart, the two upper node vertical plates (401) being connected in series in the upper chord structure (200), and a horizontal web member (402) being connected between the upper parts of the two upper node vertical plates (401), the horizontal web member (402) being arranged opposite to the corresponding web member in the upper chord structure (200); In each of the upper node structures (400), two upper node vertical plates (401) arranged opposite to each other are connected by an upper straight node web plate (403). The two flange plates of the vertical web member (302) are respectively connected to the two upper node vertical plates (401) arranged opposite to each other in the corresponding upper node structure (400), and the web plate of the vertical web member (302) is connected to the corresponding upper straight node web plate (403).

18. The crane truss structure with a parallel crane beam as the lower chord as described in claim 17, characterized in that, The upper node structure (400) is also connected to at least one corresponding diagonal brace (301), and the lower part of the upper node vertical plate (401) includes an upper straight node vertical plate (4011) and at least one upper diagonal node vertical plate (4012) connected to each other. The upper straight node vertical plates (4011) arranged opposite to each other in the upper node structure (400) are connected by the upper straight node web plate (403), and the upper oblique node vertical plates (4012) arranged opposite to each other in the upper node structure (400) are connected by the upper oblique node web plate (404); the two flange plates of the vertical web member (302) are respectively connected to the corresponding upper straight node vertical plates (4011), the two flange plates of the oblique web member (301) are respectively connected to the corresponding upper oblique node vertical plates (4012) arranged opposite to each other in the upper node structure (400), and the web plate of the oblique web member (301) is connected to the corresponding upper oblique node web plate (404).

19. The crane truss structure with a parallel crane beam as the lower chord as described in claim 18, characterized in that, The flange plate of the vertical web member (302) and the corresponding upper straight node vertical plate (4011), the web plate of the vertical web member (302) and the corresponding upper straight node web plate (403), the flange plate of the oblique web member (301) and the corresponding upper oblique node vertical plate (4012), and the web plate of the oblique web member (301) and the corresponding upper oblique node web plate (404) in the upper node structure (400) are fixed by welding, or connected by high-strength bolts, or a combination of high-strength bolts and welding.

20. The crane truss structure with a parallel crane beam as the lower chord as described in claim 1, characterized in that, The two ends of the diagonal web member (301) and the two ends of the vertical web member (302) are fixed to the corresponding node structure by welding, or by high-strength bolts, or by a combination of high-strength bolts and welding.

21. The crane truss structure with a parallel crane beam as the lower chord as described in claim 1, characterized in that, Between two adjacent vertical web members (302), there is one diagonal web member (301) or two diagonal web members (301) arranged in a cross pattern. The ends of a number of vertical web members (302) are connected to the ends of one or two adjacent diagonal web members (301) in the same node structure.

22. The crane truss structure with a parallel crane beam as the lower chord as described in claim 1, characterized in that, The thickness of the upper connecting plate (102) is less than the thickness of the upper flange plate of the crane beam (101), and the thickness of the lower connecting plate (103) is less than the thickness of the lower flange plate of the crane beam (101).

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