Crane truss structure with lower chord being crane beam with bracket

Abstract

The crane truss structure comprises an upper chord structure, a web member assembly and a lower chord structure, the lower chord structure comprises two crane beams and a plurality of middle brackets arranged at the bottoms of the two crane beams, each crane beam is provided with an I-shaped section, a plurality of upper connecting plates are connected between upper flange plates of the two crane beams, and a plurality of lower connecting plates are connected between upper flange plates of the two crane beams. A plurality of lower connecting plates are connected between the lower flange plates of the two crane beams, and the middle brackets are located between the two corresponding adjacent lower connecting plates; the web member assembly comprises a plurality of diagonal web members and a plurality of vertical web members; the upper chord structure and the lower chord structure are each provided with a plurality of joint structures, the middle brackets are right opposite to the corresponding joint structures on the lower chord structure, the two ends of the diagonal web members are connected with the corresponding joint structures, and the two ends of the vertical web members are connected with the corresponding joint structures. The large span requirement can be met, the occupied space below the rail surface is small, transportation and installation are convenient, the bearing capacity is high, the structure is stable, and the steel consumption is small.

Description

Technical Field

[0001] The invention relates to the technical field of industrial buildings, in particular to a crane truss structure with a lower chord being a crane beam with a corbel. Background Art

[0002] There are two common traditional crane beam layouts: one is a solid-web crane beam structure, and the other is a crane truss structure that combines crane beams and trusses. However, both structures are arranged below the crane rail surface, occupying the space below the crane rail surface, and both have some disadvantages:

[0003] For the solid-web crane beam structure, when the process layout requires increasing 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 when it exceeds 48m, increasing the cross-sectional height of the crane beam becomes uneconomical. This large-section crane beam is similar to a 5m to 6m "high wall", occupying the clearance below the crane rail surface, which to a certain extent restricts the process layout. In addition, this "high wall" also affects the air circulation in the workshop and the heat dissipation of high-temperature products.

[0004] For the crane truss structure composed of crane beams and trusses, when using the crane truss to achieve the requirement of a large span, the crane truss is generally limited to a span of no more than 36m. If the span reaches 50m, 60m, or even 100m and above, it is extremely difficult to achieve. There are two main reasons for this. First, after the track surface elevation is determined, the clearance below the crane truss is limited. The crane truss cannot increase its truss height accordingly as the span increases after the column is removed, resulting in an excessively large cross-section of the truss chord. Second, since the lower chord of the truss is under tension, the internal force of the web is large, and the fatigue strength of the node between the web and the chord is low. When the crane truss span is extremely large, the use of conventional crane trusses is very uneconomical and lacks practical application value.

[0005] At present, there are also some improved crane truss structures combining crane beams and trusses, which enable the trusses to utilize the space above the crane rail surface and reduce the space occupied below the rail surface, but there are also some shortcomings.

[0006] For example, patent CN217676413U discloses a large-span crane truss structure, in which the web members are arranged in a W-shape without vertical web members; the lower chord is an integral box-shaped section; and the upper chord is a uniform cross-section. However, this patent has the following disadvantages:

[0007] (1) Since the lower chord of the patent is an integral box section, when welding is carried out, it is often impossible to weld due to the closed characteristics of the section, or the welding quality requirements cannot be met; secondly, the flange of the box section is generally thicker, and the middle part of the box section contributes less to the strength of the component, and the amount of steel used is relatively large; thirdly, since the lower chord is a closed section, there are many hidden welds when processing the connection node plate between the web and the lower chord, which affects the welding quality; (2) The web of the patent is arranged in a W-shape, without vertical webs, which makes it difficult to connect the middle roof beam (or roof truss) with the upper chord, especially when there is a roof truss in the middle, the lower chord of the roof truss has no fixed position; (3) The upper chord of the patent is a uniform cross-section, and the influence of internal force changes on the cross-section is not considered. The cross-section size is not adjusted according to the internal force changes, resulting in material waste; in addition, the end section of the upper chord is generally a stress-free component, and using the same cross-section as the middle section causes waste.

[0008] For example, patent CN220264985U discloses a crane truss and plant structure. This patent describes a method for connecting the crane truss web to the lower chord box section. In this patent, the web extends two vertical gusset plates and connects to two transverse diaphragms within the lower chord box section. However, this patent has the following disadvantages:

[0009] (1) The lower chord of the patent is an integral box section. When the transverse partition is welded in the box section, there are many hidden welds, and the welding quality cannot be guaranteed; (2) Since the lower chord is a closed section, when the web extends two vertical plates into the box section, multiple closed chambers are formed in the node area of ​​the lower chord. These closed chambers form many hidden welds, affecting the welding quality.

[0010] In view of this, the inventor, based on many years of production design experience in this field and related fields, has designed a crane truss structure with a lower chord of a crane beam with a corbel after repeated experiments, in order to solve at least some of the problems existing in the prior art. Summary of the Invention

[0011] The purpose of the present invention is to provide a crane truss structure with a lower chord of a crane beam with a corbel, which can achieve large span requirements, occupy less space below the rail surface, is easy to transport and install, has a strong bearing capacity, a stable structure, and uses less steel.

[0012] The object of the present invention is achieved in this way: a crane truss structure with a lower chord crane beam with a corbel, comprising an upper chord structure, a web assembly and a lower chord structure connected in sequence from top to bottom, the lower chord structure comprising two crane beams arranged in parallel and spaced apart and a plurality of intermediate corbels arranged at the bottom of the two crane beams, the crane beam having an I-shaped cross-section, the top surface of the upper flange plate of the crane beam being used for installing the crane rail, a plurality of upper connecting plates being connected between the upper flange plates of the two crane beams, a plurality of lower connecting plates being connected between the lower flange plates of the two crane beams, and the intermediate corbel being located between the corresponding two adjacent lower connecting plates; the two ends of the crane beam being used for connecting corresponding factory building corbels, the web assembly comprising a plurality of diagonal webs and a plurality of vertical webs connected between the upper chord structure and the lower chord structure; a plurality of node structures are provided on both the upper chord structure and the lower chord structure, the intermediate corbels are arranged opposite to the corresponding node structures on the lower chord structure, the two ends of the diagonal web are connected to the corresponding node structures, and the two ends of the vertical web are connected to the corresponding node structures.

[0013] In a preferred embodiment of the present invention, the number of vertical web members is the same as the number of middle corbels, and the plurality of vertical web members are respectively arranged directly above the plurality of middle corbels. A diagonal web member or two diagonal web members arranged crosswise is provided between two adjacent vertical web members, and the ends of a certain number of vertical web members are connected to the same node structure with the ends of one or two adjacent diagonal web members.

[0014] In a preferred embodiment of the present invention, both ends of the diagonal web members and both ends of the vertical web members are fixed to the corresponding node structures by welding, or connected by high-strength bolts, or by a combination of high-strength bolts and welding.

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

[0016] In a preferred embodiment of the present invention, 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 first diagonal node vertical plates arranged in parallel and spaced apart, the two first diagonal node vertical plates are connected to two crane beams through a first connecting assembly, and a first lower diagonal node web is connected between the two first diagonal node vertical plates; the two flange plates of the diagonal web member are respectively connected to the two first diagonal node vertical plates arranged opposite to each other in the corresponding end node structure, and the web of the diagonal web member is connected to the corresponding first lower diagonal node web plate.

[0017] In a preferred embodiment of the present invention, the first connecting assembly includes an upper wing connecting plate connected between the upper flange plates of the two crane beams and a lower wing connecting plate connected between the lower flange plates of the two crane beams, two spaced-apart partitions are connected between the upper wing connecting plate and the lower wing connecting plate, and the first inclined node vertical plate passes through the upper wing connecting plate into the space between the two partitions and is connected to the upper wing connecting plate, the lower wing connecting plate and the two partitions.

[0018] In a preferred embodiment of the present invention, the upper wing plate and the upper connecting plate are connected by high-strength bolts, the lower wing plate and the lower connecting plate are connected by high-strength bolts, the upper wing plate is welded to the upper flange plates of the two crane beams, and the lower wing plate is welded to the lower flange plates of the two crane beams; the plate surface of the partition is perpendicular to the web of the crane beam, the top and bottom ends of the partition are respectively welded to the upper flange plates and lower flange plates of the two crane beams, and the two side ends of the partition are respectively welded to the webs of the two crane beams; two open grooves are provided on the upper wing plate, and the first oblique node vertical plate can pass through the corresponding open grooves, and the first oblique node vertical plate is welded to the upper wing plate, the lower wing plate and the two partitions.

[0019] In a preferred embodiment of the present invention, at least one lower combined node structure is provided on the lower chord structure, each lower combined node structure is connected to a corresponding vertical web member and a corresponding at least one diagonal web member; each lower combined node structure includes two lower combined node plates arranged in parallel and spaced apart, and the two lower combined node plates are connected to the two crane beams through a second connecting assembly; each lower combined node plate includes a connected lower straight node vertical plate and at least one second diagonal node vertical plate, a lower straight node web plate is connected between the two relatively arranged lower straight node vertical plates in each lower combined node structure, and a second lower diagonal node web plate is connected between the two relatively arranged second diagonal node vertical plates in each lower combined node structure; the two flange plates of the vertical web member are respectively connected to the two relatively arranged lower straight node vertical plates in the corresponding lower combined node structure, and the web of the vertical web member is connected to the corresponding lower straight node web plate; the two flange plates of the diagonal web member are respectively connected to the two relatively arranged second diagonal node vertical plates in the corresponding lower combined node structure, and the web of the diagonal web member is connected to the corresponding second lower diagonal node web plate.

[0020] In a preferred embodiment of the present invention, the second connecting assembly includes two first extension plates provided on both sides of the top of the two lower straight node vertical plates and two second extension plates provided on both sides of the lower straight node webs, the two first extension plates are connected to the upper flange plates of the two crane beams, and the two second extension plates are connected to the corresponding two upper connecting plates; two first connecting plates are also spaced apart on both sides of the bottom of the two lower straight node webs, and the first connecting plates are connected to the upper flange plates of the corresponding middle corbels and the corresponding lower connecting plates.

[0021] In a preferred embodiment of the present invention, the first extension plate and the upper flange plate of the corresponding crane beam, the second extension plate and the corresponding upper connecting plate, the first connecting plate and the upper flange plate of the corresponding middle corbel, the first connecting plate and the corresponding lower connecting plate, and the upper flange plate of the middle corbel and the lower flange plates of the two crane beams are all connected by high-strength bolts.

[0022] In a preferred embodiment of the present invention, at least one lower single-node structure is provided on the lower chord structure, and each lower single-node structure is connected to a corresponding vertical web member; the lower end of the vertical web member passes downward through the corresponding two adjacent upper connecting plates and the two adjacent lower connecting plates in sequence, and is connected to the upper flange plate of the corresponding middle corbel; each lower single-node structure includes two third extension plates provided on both sides of the two flange plates of the vertical web member and two fourth extension plates provided on both sides of the web of the vertical web member, the two third extension plates are connected to the upper flange plates of the two crane beams, and the two fourth extension plates are connected to the corresponding two upper connecting plates; two second connecting plates are also provided at the top of the middle corbel and on both sides of its web, the second connecting plates are connected to the upper flange plate of the middle corbel and the corresponding lower connecting plate.

[0023] In a preferred embodiment of the present invention, the third extension plate and the upper flange plate of the corresponding crane beam, the fourth extension plate and the corresponding upper connecting plate, the second connecting plate and the upper flange plate of the corresponding middle corbel, the second connecting plate and the corresponding lower connecting plate, and the upper flange plate of the middle corbel and the lower flange plates of the two crane beams are all connected by high-strength bolts.

[0024] In a preferred embodiment of the present invention, a plurality of upper combined node structures are provided on the upper chord structure, each upper combined node structure being connected to a corresponding vertical web member and a corresponding at least one diagonal web member; each upper combined node structure comprises two upper combined node plates arranged in parallel and spaced apart, the two upper combined node plates being connected in series in the upper chord structure, a first horizontal web plate being connected between the upper portions of the two upper combined node plates, the first horizontal web plate being arranged opposite to the corresponding web plate in the upper chord structure; the lower portion of each upper combined node plate comprises a connected upper straight node vertical plate and at least one third diagonal node vertical plate, The first upper straight node web is connected between the two upper straight node vertical plates arranged opposite to each other in each upper combined node structure, and the upper inclined node web is connected between the two third inclined node vertical plates arranged opposite to each other in each upper combined node structure; the two flange plates of the vertical web members are respectively connected to the two upper straight node vertical plates arranged opposite to each other in the corresponding upper combined node structure, and the web of the vertical web members is connected to the corresponding first upper straight node web; the two flange plates of the diagonal web members are respectively connected to the two third inclined node vertical plates arranged opposite to each other in the corresponding upper combined node structure, and the web of the diagonal web members is connected to the corresponding upper inclined node web.

[0025] In a preferred embodiment of the present invention, the flange plates of the vertical web members and the corresponding upper straight node vertical plates, the web plates of the vertical web members and the corresponding first upper straight node web plates, the flange plates of the diagonal web members and the corresponding third diagonal node vertical plates, and the web plates of the diagonal web members and the corresponding upper diagonal node web plates in the upper combined node structure are fixed by welding, connected by high-strength bolts, or connected by a combination of high-strength bolts and welding.

[0026] In a preferred embodiment of the present invention, at least one upper single-node structure is provided on the upper chord structure, and each upper single-node structure is connected to a corresponding vertical web member; each upper single-node structure includes two single-node vertical plates arranged in parallel and spaced apart, and the two single-node vertical plates are connected in series in the upper chord structure, and a second horizontal web is connected between the upper parts of the two upper single-node vertical plates, and the second horizontal web is arranged opposite to the corresponding web in the upper chord structure; a second upper straight node web is also connected between the lower parts of the two single-node vertical plates, and the two flange plates of the vertical web member are respectively connected to the corresponding two single-node vertical plates, and the web of the vertical web member is connected to the corresponding second upper straight node web.

[0027] In a preferred embodiment of the present invention, the flange plates of the vertical web members in the upper single node structure and the corresponding single node vertical plates, as well as the web plates of the vertical web members and the corresponding second upper straight node web plates, are fixed by welding, connected by high-strength bolts, or connected by a combination of high-strength bolts and welding.

[0028] In a preferred embodiment of the present invention, 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, the second end of the connecting rod is used to connect to the corresponding upper column of the factory building, and the cross-sectional area of ​​the connecting rod is smaller than the cross-sectional area of ​​the intermediate chord.

[0029] In a preferred embodiment of the present invention, the connection node between the upper chord structure and the web member assembly is used to connect the corresponding roof beams; 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 part of the vertical web members are used to connect the lower chord of the roof truss.

[0030] In a preferred embodiment of the present invention, the cross-sectional height of the crane beam is ≤2.5m.

[0031] In a preferred embodiment of the present invention, the thickness of the upper connecting plate is smaller than the thickness of the upper flange plate of the crane beam, and the thickness of the lower connecting plate is smaller than the thickness of the lower flange plate of the crane beam.

[0032] In a preferred embodiment of the present invention, a plurality of intermediate plates are provided between the two crane beams, and the intermediate plates are located between two adjacent intermediate corbels, or between the factory corbel and the corresponding intermediate corbel; a maintenance manhole is provided in the middle of the intermediate plate, and the intermediate plate is connected to the upper connecting plate, the lower connecting plate and the webs of the two crane beams.

[0033] In a preferred embodiment of the present invention, an annular reinforcing plate is further provided on the wall of the inspection manhole.

[0034] As described above, the lower chord of the present invention is a crane truss structure with a corbel crane beam, and the upper chord structure is connected to the lower chord structure through a web assembly, and the lower chord structure and the upper chord structure are connected through the web assembly, so that the upper chord structure, the web assembly and the lower chord structure are a whole. The upper chord structure and the web assembly are all located above the rail surface, and the entire crane truss structure can achieve the large span requirement, and the upper chord structure and the web assembly basically occupy the space above the rail surface, mainly because the crane beam and the middle corbel are located below the rail surface, and the entire crane truss structure occupies less space below the crane rail surface, which fully meets the process layout requirements; the height of the entire crane truss structure can be free from the clearance limit of the lower part of the crane rail surface, and the height of the truss structure can be higher, which brings significant economic advantages to the crane truss; it solves the problem that the existing super-large span crane beam has a large cross-sectional height, occupies more lower space, and affects the air circulation inside the workshop.

[0035] At the same time, the two crane beams in the lower chord structure are combined with the upper connecting plate and the lower connecting plate to form a box-type section, which makes the structure more stable. Compared with the existing method of directly using a closed integral box-type section, it is easier to operate when welding is required and can reduce hidden welds. The lower chord structure of the present application not only participates in the force bearing of the truss, but also directly bears the crane's running load, and the box-type section formed by it can ensure that it does not bend laterally. When the web assembly only bears axial tension and compression loads, the bearing capacity is relatively high. The entire crane truss structure is simple in structure, has clear force bearing, and saves steel. In addition, the upper chord structure, diagonal webs, vertical webs, crane beams, upper connecting plates, lower connecting plates and middle brackets can be manufactured in separate modular units, which is more convenient for processing, transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0037] in:

[0038] Figure 1 The present invention provides a structural schematic diagram of a crane truss structure in which the lower chord is a crane beam with a corbel.

[0039] Figure 2 for Figure 1 Section view at AA.

[0040] Figure 3 for Figure 1 In the cross-section of BB.

[0041] Figure 4 for Figure 1 A cross-sectional view of the CC.

[0042] Figure 5 for Figure 1 In the cross-section of DD.

[0043] Figure 6 The upper chord structure provided by the present invention adopts a cross-sectional view of an H-shaped cross-section.

[0044] Figure 7 The upper chord structure provided by the present invention adopts a cross-sectional view of a box-shaped section.

[0045] Figure 8 Another cross-sectional view of the upper chord structure provided by the present invention adopting a box-shaped cross-section.

[0046] Figure 9 for Figure 1 A local enlarged view at point U.

[0047] Figure 10 for Figure 9 In the cross-section of EE.

[0048] Figure 11 for Figure 9 Cross-section of FF.

[0049] Figure 12 for Figure 10 In the cross-section of GG.

[0050] Figure 13 for Figure 1 A local enlarged view at V.

[0051] Figure 14 for Figure 13 In the cross-sectional view of HH.

[0052] Figure 15 for Figure 13 In the cross-sectional view of II.

[0053] Figure 16 for Figure 14 In the cross-section of JJ.

[0054] Figure 17 This is a schematic diagram of the diagonal web members and vertical web members provided by the present invention being connected to the lower combined node structure using high-strength bolts.

[0055] Figure 18 for Figure 17 Cross-section view at KK.

[0056] Figure 19 for Figure 17 Sectional view in LL.

[0057] Figure 20 for Figure 1A partial enlarged view at W.

[0058] Figure 21 for Figure 20 In the cross-sectional view of MM.

[0059] Figure 22 for Figure 20 Sectional view of NN.

[0060] Figure 23 for Figure 21 Cross-section of PP.

[0061] Figure 24 for Figure 1 A local enlarged view at X in FIG.

[0062] Figure 25 This is a schematic diagram of the diagonal web members and vertical web members provided by the present invention being connected to the upper combined node structure using high-strength bolts.

[0063] Figure 26 for Figure 1 A partial enlarged view at Y in FIG.

[0064] Figure 27 for Figure 1 A local enlarged view at position Z in the figure.

[0065] Figure 28 for Figure 27 A cross-sectional view of QQ.

[0066] Figure 29 for Figure 27 In the cross-section of RR.

[0067] Figure 30 for Figure 29 In the cross-section of SS.

[0068] Figure 31 The present invention provides a schematic diagram of a crane truss structure in which the lower chord is a crane beam with a corbel and the number of intervals is three.

[0069] Figure 32 Another schematic diagram of a crane truss structure provided by the present invention, in which the lower chord is a crane beam with a corbel and the number of intervals is arranged as three.

[0070] Figure 33 The present invention provides a schematic diagram of a crane truss structure in which the lower chord is a crane beam with a corbel and the number of intervals is 5.

[0071] Figure 34 Another schematic diagram of a crane truss structure provided by the present invention, in which the lower chord is a crane beam with a corbel and the number of intervals is 5.

[0072] Description of Figure Numbers:

[0073] 100, upper chord structure; 101, middle chord member; 102, connecting rod;

[0074] 201, oblique brace; 202, vertical brace;

[0075] 300, lower chord structure; 301, crane beam; 3011, crane rail; 3012, first support stiffener; 3013, first end stiffener; 3014, first middle stiffener; 3015, second middle stiffener; 3016, outer stiffener; 302, middle corbel; 3021, third middle stiffener; 303, upper connecting plate; 304, lower connecting plate; 305, middle plate; 3051, inspection manhole; 3052, reinforcement stiffener; 3053, rectangular plate; 3054, upper T-plate; 3055, lower T-plate;

[0076] 400, end node structure; 401, first oblique node vertical plate; 402, first lower oblique node web plate; 403, upper wing connecting plate; 404, lower wing connecting plate; 405, partition plate;

[0077] 500, lower combined node structure; 501, lower combined node plate; 5011, lower straight node vertical plate; 5012, second inclined node vertical plate; 502, lower straight node web plate; 503, second lower inclined node web plate; 5041, web splice plate; 5042, outer flange splice plate; 5043, inner flange splice plate; 505, first extension plate; 506, second extension plate; 5061, inner extension plate; 5062, outer extension plate; 507, first connecting plate;

[0078] 600, single node structure; 601, third extension plate; 602, fourth extension plate; 603, second connecting plate;

[0079] 700, upper combined node structure; 701, upper combined node plate; 7011, upper straight node vertical plate; 7012, third inclined node vertical plate; 702, first horizontal web plate; 703, first upper straight node web plate; 704, upper inclined node web plate; 705, first upper stiffener plate;

[0080] 800, upper single node structure; 801, single node vertical plate; 802, second horizontal web; 803, second upper vertical node web; 804, second upper stiffener;

[0081] 901, roof beam; 902, factory column; 9021, factory upper column; 9022, factory lower column; 9023, factory corbel; h1, ground position; h2, track surface elevation; h3, roof elevation. DETAILED DESCRIPTION

[0082] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0083] like Figures 1 to 34 As shown, the present application provides a crane truss structure with a lower chord of a crane beam with a bracket, comprising an upper chord structure 100, a web assembly and a lower chord structure 300 connected in sequence from top to bottom, the lower chord structure 300 comprising two crane beams 301 arranged in parallel and spaced apart and a plurality of intermediate brackets 302 arranged at the bottom of the two crane beams 301, the crane beam 301 having an I-shaped cross-section, the top surface of the upper flange plate of the crane beam 301 being used to install a crane rail 3011, a plurality of upper connecting plates 303 being connected between the upper flange plates of the two crane beams 301, and a plurality of lower connecting plates 303 being connected between the lower flange plates of the two crane beams 301. The connecting plate 304 and the middle corbel 302 are located between the corresponding two adjacent lower connecting plates 304; the two ends of the crane beam 301 are used to connect the corresponding factory corbels 9023, and the web assembly includes multiple diagonal webs 201 and multiple vertical webs 202 connected between the upper chord structure 100 and the lower chord structure 300; multiple node structures are provided on the upper chord structure 100 and the lower chord structure 300, and the middle corbel 302 is arranged opposite to the corresponding node structure on the lower chord structure 300, and the two ends of the diagonal web 201 are connected to the corresponding node structures, and the two ends of the vertical web 202 are connected to the corresponding node structures.

[0084] The entire crane truss structure is installed between two factory building columns 902. Factory building columns 902 include an upper factory building column 9021 and a lower factory building column 9022. These columns are connected (e.g., welded) via a factory building corbel 9023. Typically, upper factory building columns 9021 utilize an I-shaped cross section, while lower factory building columns 9022 can utilize round steel pipes or I-shaped cross sections. The crane beam 301 is supported on and connected to the two factory building corbels 9023 at both ends, while the middle portion of the crane beam 301 is supported on and connected to the middle corbel 302. The length direction of the upper chord structure 100 is parallel to the length direction of the crane beam 301. The two crane beams 301 are symmetrically distributed on both sides of the upper chord structure 100. The upper flange plate and the lower flange plate of the crane beam 301 are horizontally arranged, and the web plate of the crane beam 301 is vertically arranged. The upper connecting plate 303 and the lower connecting plate 304 are both horizontal plates. The length direction of the vertical web member 202 is vertically arranged, and the length direction of the diagonal web member 201 is inclined.

[0085] The entire lower chord structure 300 is composed of two parallel I-shaped crane beams 301, a middle corbel 302 at the bottom of the crane beams 301, and an upper connecting plate 303 and a lower connecting plate 304. These two crane beams 301 are supported by two node structures at both ends of the lower chord structure 300 and the middle corbel 302, and are designed as a continuous crane beam 301. These two parallel crane beams 301 not only serve as the lower chord of the truss, but also as the crane track supports, supporting the crane's longitudinal movement. The upper flange plates of the two crane beams 301 are connected by the upper connecting plate 303, and the lower flange plates of the two crane beams 301 are connected by the lower connecting plate 304. At this point, the cross-section of the lower chord structure 300 of the crane truss forms a box section, enhancing the torsional resistance of the lower chord section. The upper surface of this box section is also suitable for people to walk on.

[0086] The lower chord structure 300 of the present application is part of the load-bearing truss and also serves as the crane operating structure. The box-shaped section formed by the lower chord structure 300 can ensure its own lateral stability (a characteristic of the box-shaped section itself), i.e., the load-bearing lower chord, and prevent itself from lateral bending. The webs only bear axial tension and pressure, and do not bear out-of-plane bending loads. When the webs only bear axial tension and compression loads, their bearing capacity is relatively high. The lower end of the diagonal web member 201 at the end is connected to the lower chord structure 300. The end of the present application is a bottom-supported support. The diagonal web member 201 at the end transfers the entire load to the end of the lower chord structure 300. The lower chord structure 300 directly acts on the shoulder beam (i.e., the factory corbel 9023 of the factory column 902). It has a simple structure and clear force transmission. In the present application, the box-type crane beam structure formed by the two crane beams 301 and the upper connecting plate 303 and the lower connecting plate 304 is the lower chord of the truss structure, so that the structure does not occupy the space below the crane beam 301, thereby increasing space utilization.

[0087] Therefore, in the crane truss structure of the present application, the upper chord structure 100 and the lower chord structure 300 are connected by the web assembly, and the lower chord structure 300 and the upper chord structure 100 are connected by the web assembly, so that the upper chord structure 100, the web assembly and the lower chord structure 300 are formed as a whole, and the upper chord structure 100 and the web assembly are all located above the rail surface. The entire crane truss structure can achieve the large span requirement, and the upper chord structure 100 and the web assembly basically occupy the space above the rail surface, mainly the crane beam 301 and the middle bracket 302 are located below the rail surface, and the entire crane truss structure occupies less space below the crane rail surface, which fully meets the process layout requirements; the height of the entire crane truss structure can be free from the clearance limit of the lower part of the crane rail surface, and the height of the truss structure can be higher, which brings significant economic advantages to the crane truss; it solves the problem that the existing super-large span crane beam 301 has a large cross-sectional height, occupies more lower space, and affects the air circulation inside the workshop.

[0088] At the same time, the two crane beams 301 in the lower chord structure 300 are enclosed with the upper connecting plate 303 and the lower connecting plate 304 to form a box section, which makes the structure more stable. Compared with the existing method of directly adopting a closed integral box section, it is easier to operate when welding is required and can reduce hidden welds. The lower chord structure 300 of the present application not only participates in the truss stress, but also directly bears the crane travel load, and the box section formed by it can ensure that it does not undergo lateral bending. When the web member assembly only bears axial tension and compression loads, the bearing capacity is higher. The entire crane truss structure is simple in structure, has clear stress, and saves steel. In addition, the upper chord structure 100, the diagonal web member 201, the vertical web member 202, the crane beam 301, the upper connecting plate 303, the lower connecting plate 304 and the middle bracket 302 can be manufactured in a separate modular manner, which is more convenient for processing, transportation and installation.

[0089] Furthermore, the ground position h1, the track 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 smaller. In this application, the cross-sectional height of the crane beam 301 is ≤2.5m. Generally, the cross-sectional height of the crane beam 301 is 2m-2.5m, which can meet various requirements such as force and installation.

[0090] According to the needs, the number of sections of the entire crane truss structure is not limited to 4, and can also be designed to be 2, 3, 5, 6, 7, etc. The number of sections is also equal to the number of spans. The schematic structures of typical sections are as follows: Figures 31 to 34 shown.

[0091] In actual applications, the number of vertical web members 202 is the same as the number of middle corbels 302, and multiple vertical web members 202 are respectively located directly above the multiple middle corbels 302. Generally, a diagonal web member 201 is provided between two adjacent vertical web members 202, or two diagonal web members 201 arranged crosswise are provided between two adjacent vertical web members 202. A diagonal web member 201 is provided between the two vertical web members 202 near the ends of the lower chord structure 300 and the corresponding ends of the lower chord structure 300, and the lower end of the diagonal web member 201 is connected to the node structure at the end of the lower chord structure 300. The ends of a portion of the vertical web members 202 are connected to the same node structure as the ends of two adjacent diagonal web members 201, and / or the ends of a portion of the vertical web members 202 are connected to the same node structure as the end of one of the adjacent diagonal web members 201. In addition, a portion of the vertical web members 202 are connected to a single node structure. The specific connection arrangement can be determined according to actual conditions.

[0092] Optionally, different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding mixed connection can be used between the two ends of the diagonal web member 201 and the corresponding node structure, as well as between the two ends of the vertical web member 202 and the corresponding node structure.

[0093] The upper chord structure 100 is a rod structure, which can be an I-section, H-section, box-section or other reasonable sections. The diagonal web members 201 and the vertical web members 202 can be H-section, box-section or other reasonable sections. The cross-sectional shapes of the upper chord structure 100, the multiple diagonal web members 201 and the multiple vertical web members 202 can be all the same or partially the same. The specific cross-sectional shapes can be determined according to actual needs. For example, when the upper chord structure 100 adopts a solid I-section or H-section, refer to Figure 4 The web of the upper chord structure 100 is arranged horizontally, and the flange plates on both sides of the upper chord structure 100 can be used to connect the roof beam 901 or the upper chord of the roof truss. Figure 4 The web of the vertical web member 202 is vertically arranged and perpendicular to the web of the crane beam 301. The flange plates on both sides of the vertical web member 202 are also vertically arranged and can be used to connect the lower chord of the roof truss.

[0094] For example, in some embodiments, the upper chord structure 100, the diagonal web members 201, and the vertical web members 202 are H-sections and include two flange plates and one web plate; or, the upper chord structure 100, the diagonal web members 201, and the vertical web members 202 are box-sections and include two flange plates and two web plates.

[0095] For embodiments in which the diagonal web members 201 and the vertical web members 202 adopt an H-shaped cross-section or a box-shaped cross-section, the node connections between the diagonal web members 201 and the vertical web members 202 and the upper chord structure 100 and the lower chord structure 300 can be implemented as follows: the node structures on the lower chord structure 300 can be divided into end node structures 400 located at the ends, and a lower combined node structure 500 and a lower single node structure 600 located between the two ends. The node structures on the upper chord structure 100 can be divided into an upper combined node structure 700 and an upper single node structure 800 located between the two ends, as follows:

[0096] End node structure 400:

[0097] Reference Figures 9 to 12 Two end node structures 400 are provided at both ends of the lower chord structure 300, and each end node structure 400 is connected to a corresponding diagonal web member 201; each end node structure 400 includes two first diagonal node vertical plates 401 arranged in parallel and spaced apart, and the two first diagonal node vertical plates 401 are connected to the two crane beams 301 through a first connecting assembly, and a first lower diagonal node web plate 402 is connected between the two first diagonal node vertical plates 401; the two flange plates of the diagonal web member 201 are respectively connected to the two first diagonal node vertical plates 401 arranged opposite to each other in the corresponding end node structure 400, and the web of the diagonal web member 201 is connected to the corresponding first lower diagonal node web plate 402.

[0098] The upper flange plate and the upper connecting plate 303 of the crane beam 301 and the lower flange plate and the lower connecting plate 304 of the crane beam 301 can be connected by different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding mixed connection.

[0099] Preferably, the upper flange plate and upper connecting plate 303 of the crane beam 301, as well as the lower flange plate and lower connecting plate 304 of the crane beam 301, are connected by high-strength bolts, resulting in improved fatigue resistance. Specifically, the upper connecting plate 303 and the lower connecting plate 304 are both rectangular plates whose width along the width direction of the crane beam 301 is greater than the spacing between the upper flange plates of the two crane beams 301. The two sides of the upper connecting plate 303 in the width direction overlie the upper surfaces of the upper flange plates of the two crane beams 301 and are connected by high-strength bolts. The two sides of the lower connecting plate 304 in the width direction abut against the lower surfaces of the lower flange plates of the two crane beams 301 and are connected by high-strength bolts.

[0100] The number of the first lower inclined node webs 402 is the same as the number of webs in the diagonal web member 201. Generally, the first lower inclined node webs 402 are welded and fixed to the first inclined node vertical plates 401. As needed, the first inclined node vertical plates 401 can be formed by extending downward the corresponding flange plates of the diagonal web member 201. During processing, the first inclined node vertical plates 401 and the flange plates of the diagonal web member 201 are integrally formed, which provides better structural stability. Alternatively, different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding mixed connection can be used between the two first inclined node vertical plates 401 and the two flange plates of the diagonal web member 201, and between the first lower inclined node webs 402 and the web of the diagonal web member 201. Compared with the integral molding of the flange plates of the first inclined node vertical plates 401 and the diagonal web member 201, the method of separate processing and connection saves more materials during processing. The specific connection method depends on actual needs, for example Figure 9 The first oblique node vertical plate 401 and the first lower oblique node web plate 402 shown in the figure are all connected to the diagonal web member 201 by welding.

[0101] Furthermore, in order to facilitate the connection between the first inclined node vertical plate 401 and the crane beam 301, the first connecting assembly includes an upper wing connecting plate 403 connected between the upper flange plates of the two crane beams 301 and a lower wing connecting plate 404 connected between the lower flange plates of the two crane beams 301. Two spaced-apart partitions 405 are connected between the upper wing connecting plate 403 and the lower wing connecting plate 404. The first inclined node vertical plate 401 is inserted into the space between the two partitions 405 by the upper wing connecting plate 403, and is connected to the upper wing connecting plate 403, the lower wing connecting plate 404 and the two partitions 405.

[0102] The first oblique node vertical plate 401 comprises an oblique plate and a rectangular plate integrally connected above and below. The oblique plate is arranged upwardly and tilted from the end of the crane beam 301 toward the middle. A first lower oblique node web 402 is connected between the two oblique plates. The lower end of the first lower oblique node web 402 can be welded to the upper surface of the upper wing plate 403. The rectangular plate is inserted into the rectangular space between the two partitions 405 by the upper wing plate 403. The upper wing plate 403 and the lower wing plate 404 are both rectangular plates with horizontal surfaces. The thickness of the upper and lower flange plates of the crane beam 301 and the thickness of the upper and lower wing plates 403 and 404 are the same. The upper wing plate 403 is located between the two upper flange plates of the two crane beams 301, and the three are aligned in the same horizontal plane. The lower wing plate 404 is located between the two lower flange plates of the two crane beams 301, and the three are aligned in the same horizontal plane. The two partitions 405 are both rectangular plates with vertically arranged plate surfaces. The plate surfaces of the partitions 405 are perpendicular to the webs of the crane beams 301 .

[0103] Different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding mixed connection can be used between the upper wing connecting plate 403 and the upper connecting plate 303, between the lower wing connecting plate 404 and the lower connecting plate 304, between the upper wing connecting plate 403 and the upper flange plates of the two crane beams 301, between the lower wing connecting plate 404 and the lower flange plates of the two crane beams 301, between the partition plate 405 and the two crane beams 301, and between the first inclined node vertical plate 401 and the two partition plates 405, and between the upper wing connecting plate 403 and the lower wing connecting plate 404. The specific connection method depends on actual needs.

[0104] Taking into account the processing, installation and structural stability, as a preferred example, the upper wing plate 403 is connected to the upper connecting plate 303 by high-strength bolts, and the lower wing plate 404 is connected to the lower connecting plate 304 by high-strength bolts, which can reduce the amount of welding and improve fatigue resistance. The upper wing connecting plate 403 is welded to the upper flange plates of the two crane beams 301, and the lower wing connecting plate 404 is welded to the lower flange plates of the two crane beams 301; the top and bottom ends of the partition plate 405 are respectively welded to the upper flange plates and lower flange plates of the two crane beams 301, and the two side ends of the partition plate 405 are respectively welded to the webs of the two crane beams 301; two open grooves are provided on the upper wing connecting plate 403 (the open grooves are also long strip-shaped openings, the length direction of the open grooves is parallel to the length direction of the crane beam 301, and the length of the open grooves is equal to the interval between the two partition plates 405), and the first oblique node vertical plate 401 can pass through the corresponding open grooves. The first oblique node vertical plate 401 is welded to the upper wing connecting plate 403, the lower wing connecting plate 404 and the two partition plates 405; welding is used in these places to make the connection more convenient.

[0105] In this example, the corresponding ends of the upper connecting plate 303 overlie the upper surface of the upper wing plate 403 and are connected via high-strength bolts. The widthwise sides of the lower connecting plate 304 abut against the lower surfaces of the lower flange plates of the two crane beams 301. The corresponding ends of the lower connecting plate 304 abut against the lower surfaces of the lower wing plate 404 and are connected via high-strength bolts. The width of the opening slot is generally slightly greater than the thickness of the first oblique node vertical plate 401. Gaps are left between the sides and bottom of the rectangular plate of the first oblique node vertical plate 401 and the two partitions 405 and the lower wing plate 404. Split welding is employed between the first oblique node vertical plate 401 and the upper wing plate 403, between the sides of the rectangular plate of the first oblique node vertical plate 401 and the two partitions 405, and between the bottom of the rectangular plate of the first oblique node vertical plate 401 and the lower wing plate 404.

[0106] Further optionally, a first support stiffening plate 3012 is provided on both sides of the web of each crane beam 301 at positions corresponding to the factory corbel 9023, and a first end stiffening plate 3013 is also provided on the outer side of the web of each crane beam 301 opposite the partition 405 to improve the structural strength and bearing capacity.

[0107] The following combined node structure 500:

[0108] Reference Figures 13 to 19 At least one lower combined node structure 500 is provided on the lower chord structure 300, and each lower combined node structure 500 is connected to a corresponding vertical web member 202 and at least one corresponding diagonal web member 201; each lower combined node structure 500 includes two lower combined node plates 501 arranged in parallel and spaced apart, and the two lower combined node plates 501 are connected to the two crane beams 301 through a second connecting assembly.

[0109] Each lower combined node plate 501 includes a connected lower straight node vertical plate 5011 and at least one second inclined node vertical plate 5012; a lower straight node web plate 502 is connected between the two oppositely arranged lower straight node vertical plates 5011 in each lower combined node structure 500; a second lower inclined node web plate 503 is connected between the two oppositely arranged second inclined node vertical plates 5012 in each lower combined node structure 500; the two flange plates of the vertical web member 202 are respectively connected to the two oppositely arranged lower straight node vertical plates 5011 in the corresponding lower combined node structure 500, and the web plate of the vertical web member 202 is connected to the corresponding lower straight node web plate 502; the two flange plates of the diagonal web member 201 are respectively connected to the two oppositely arranged second inclined node vertical plates 5012 in the corresponding lower combined node structure 500, and the web plate of the diagonal web member 201 is connected to the corresponding second lower inclined node web plate 503.

[0110] Generally, the various parts of the lower combined gusset plate 501 are integrally formed. Typically, the lower combined gusset plate 501 includes an integrally formed lower straight gusset plate 5011 and a second oblique gusset plate 5012. Alternatively, the lower combined gusset plate 501 includes an integrally formed lower straight gusset plate 5011 and two second oblique gusset plates 5012 symmetrically distributed on either side of the lower straight gusset plate 5011. The number of lower straight gusset webs 502 is the same as the number of webs in the vertical web members 202. The number of second lower oblique gusset webs 503 in the two oppositely arranged second oblique gusset plates 5012 is the same as the number of webs in the corresponding oblique web members 201.

[0111] The plate surface of the lower combined gusset plate 501 is vertical and parallel to the length direction of the crane beam 301. The plate surface of the lower straight node web 502 is vertically arranged and perpendicular to the length direction of the crane beam 301. The upper and lower ends of the lower straight node web 502 extend from the upper end to the lower end of the lower combined gusset plate 501. The plate surface of the second lower oblique node web 503 is inclined, and the upper end of the second lower oblique node web 503 is aligned with the web of the corresponding diagonal web member 201, and the lower end is connected to the upper side surface of the lower straight node web 502. Generally, the lower straight node web 502 is welded to the lower straight node vertical plate 5011, the second lower oblique node web 503 is welded to the second oblique node vertical plate 5012, and the lower end of the second lower oblique node web 503 is welded to the corresponding side surface of the lower straight node web 502.

[0112] As needed, the lower combined node vertical plate can be integrally formed with the corresponding flange plates of the vertical web members 202 and the corresponding flange plates of each diagonal web member 201, thereby improving structural stability. Alternatively, welding, high-strength bolt connection, or a combination of high-strength bolt connection and welding can be used between the two lower straight node vertical plates 5011 and the two flange plates of the vertical web members 202, between the lower straight node web plate 502 and the web plate of the vertical web member 202, between the two oppositely arranged second inclined node vertical plates 5012 and the two flange plates of the corresponding diagonal web members 201, and between the second lower inclined node web plate 503 and the web plate of the corresponding diagonal web member 201. Compared to integrally forming the combined node vertical plate with the flange plates of the vertical web members 202 and the flange plates of the diagonal web members 201, separate processing and connection can save more material. The specific connection method depends on actual needs.

[0113] For example Figure 13 As shown in the figure, the lower straight node riser 5011 and the lower straight node web 502 and the vertical web member 202, as well as the second oblique node riser 5012 and the second lower oblique node web 503 and the corresponding oblique web member 201 are all connected by welding.

[0114] For example, Figures 17 to 19In the lower combined node structure 500 shown in FIG, the lower combined node plate 501 is connected to the vertical web member 202 and the diagonal web member 201 by friction-type high-strength bolts. Specifically, taking the connection between the lower combined node structure 500 and the vertical web member 202 as an example, two web splicing plates 5041 are provided on both sides of the web of the vertical web member 202, and outer flange splicing plates 5042 and inner flange splicing plates 5043 are provided on the outer side and inner side of the flange plate of the vertical web member 202. The upper and lower parts of the web splicing plates 5041 respectively cover the web of the vertical web member 202 and the lower straight node web 502, and the upper and lower parts of the outer flange splicing plates 5042 respectively cover the vertical web member 202 and the lower straight node web 502. The outer surface of the flange plate of the web member 202 and the outer surface of the lower straight node vertical plate 5011, and the upper and lower parts of the inner flange splicing plate 5043 respectively cover the inner surface of the flange plate of the vertical web member 202 and the inner surface of the lower straight node vertical plate 5011; the two web splicing plates 5041 and the web of the vertical web member 202, the two web splicing plates 5041 and the lower straight node web plate 502, the outer flange splicing plate 5042 and the flange plate of the vertical web member 202 and the inner flange splicing plate 5043, and the outer flange splicing plate 5042 and the lower straight node vertical plate 5011 and the inner flange splicing plate 5043 are all connected by friction-type high-strength bolts.

[0115] Furthermore, in order to facilitate the connection between the lower combined node plate 501 and the crane beam 301, the second connecting assembly includes two first extension plates 505 arranged on both sides of the top of the two lower straight node vertical plates 5011 and two second extension plates 506 arranged on both sides of the lower straight node web 502. The two first extension plates 505 are connected to the upper flange plates of the two crane beams 301, and the two second extension plates 506 are connected to the corresponding two upper connecting plates 303; two first connecting plates 507 are also spaced apart on both sides of the bottom of the two lower straight node webs 502, and the first connecting plates 507 are connected to the upper flange plates of the corresponding middle corbels 302 and the corresponding lower connecting plates 304.

[0116] The two first extension plates 505 are disposed on the outer sides of the two lower straight node vertical plates 5011, facing away from each other, and the plate surfaces of the first extension plates 505 are arranged horizontally. The plate surfaces of the second extension plates 506 are also arranged horizontally, and the second extension plates 506 are located above the lower end of the second lower oblique node web plate 503. Therefore, each second extension plate 506 generally includes an inner extension plate 5061 and an outer extension plate 5062, which are arranged at intervals along the length of the crane beam 301. The inner extension plate 5061 is connected to the lower straight node web plate 502 and the two lower straight node vertical plates 5011. The gap between the inner extension plate 5061 and the outer extension plate 5062 allows the corresponding second lower oblique node web plate 503 to pass through. The outer extension plate 5062 is connected to the two lower straight node vertical plates 5011 and the corresponding upper connecting plate 303. Generally, the first extension plate 505 is welded to the corresponding lower vertical node plate 5011, the inner extension plate 5061 is welded to the lower vertical node web 502 and the two lower vertical node plates 5011, the second lower oblique node web 503 is welded to the inner extension plate 5061 and the outer extension plate 5062 at the gap position, and the outer extension plate 5062 is welded to the two lower vertical node plates 5011. Two first connecting plates 507 are symmetrically arranged on either side of the lower vertical node web 502. The first connecting plates 507 are rectangular plates with their lengths perpendicular to the length of the crane beam 301. A gap is provided between the first connecting plates 507 and the lower vertical node web 502, and avoidance notches are formed on the edges of the first connecting plates 507 corresponding to the two lower combined gusset plates 501 to prevent contact with the lower combined gusset plates 501.

[0117] The length of the intermediate corbel 302 is perpendicular to the length of the crane beam 301. The intermediate corbel 302 typically has an I-shaped cross-section, with its web positioned vertically and perpendicular to the web of the crane beam 301. The width of the lower combined gusset plate 501 typically decreases from top to bottom. The bottom width of the lower combined gusset plate 501 is the same as the width of the upper flange of the intermediate corbel 302. The bottom ends of the two lower combined gusset plates 501 and the bottom ends of the lower straight gusset web 502 are welded to the upper flange of the intermediate corbel 302. The intermediate corbel 302 is positioned between two adjacent lower connecting plates 304. The upper flange of the intermediate corbel 302 and the lower connecting plate 304 are located in the same horizontal plane. The upper flange of the intermediate corbel 302 abuts against the lower surface of the lower flange of the crane beam 301 and is connected to the lower flange of the crane beam 301.

[0118] The connections between the first extension plate 505 and the upper flange plate of the corresponding crane beam 301, between the second extension plate 506 and the corresponding upper connecting plate 303, between the first connecting plate 507 and the upper flange plate of the corresponding intermediate corbel 302, between the first connecting plate 507 and the corresponding lower connecting plate 304, and between the upper flange plate of the intermediate corbel 302 and the lower flange plates of the two crane beams 301 can be made using various connection methods, including welding, high-strength bolt connection, or a combination of high-strength bolt connection and welding. The specific connection method is determined according to actual needs. Generally, high-strength bolt connection is preferably used in these locations to reduce the amount of welding and improve fatigue resistance.

[0119] Specifically, during installation, part of the first extension plate 505 covers the upper surface of the upper flange plate of the crane beam 301 and is connected by high-strength bolts; the height of the second extension plate 506 is lower than that of the first extension plate 505, and the end of the second extension plate 506 is abutted against the lower surface of the corresponding upper connecting plate 303 and is connected by high-strength bolts; part of the first connecting plate 507 covers the upper surface of the corresponding lower connecting plate 304, and part of it covers the upper flange plate of the middle corbel 302 and is connected by high-strength bolts; the upper flange plate of the middle corbel 302 of the lower combined node structure 500 is abutted against the lower surface of the lower flange plate of the crane beam 301 and is connected by high-strength bolts.

[0120] Further optionally, a first middle stiffening plate 3014 is provided on both sides of the web of each crane beam 301 at a position corresponding to each lower straight node web 502 to improve the structural strength and bearing capacity.

[0121] Order node structure 600:

[0122] Reference Figures 20 to 23 At least one lower single node structure 600 is provided on the lower chord structure 300, and each lower single node structure 600 is connected to a corresponding vertical web member 202; the lower end of the vertical web member 202 passes downward through the corresponding two adjacent upper connecting plates 303 and the two adjacent lower connecting plates 304 in sequence, and is connected to the upper flange plate of the corresponding middle corbel 302; each lower single node structure 600 includes two third extension plates 601 provided on both sides of the two flange plates of the vertical web member 202 and two fourth extension plates 602 provided on both sides of the web of the vertical web member 202, the two third extension plates 601 are connected to the upper flange plates of the two crane beams 301, and the two fourth extension plates 602 are connected to the corresponding two upper connecting plates 303; two second connecting plates 603 are also provided at the top of the middle corbel 302 and on both sides of its web, the second connecting plates 603 are connected to the upper flange plate of the middle corbel 302 and the corresponding lower connecting plate 304.

[0123] Generally, the lower end of the vertical web member 202 is welded to the upper flange plate of the middle corbel 302, the third extension plate 601 is welded to the lower vertical node vertical plate 5011, and the fourth extension plate 602 is welded to the lower vertical node web plate 502 and the two lower vertical node vertical plates 5011. The length direction of the middle corbel 302 is perpendicular to the length direction of the crane beam 301. The middle corbel 302 has an I-shaped cross-section, and the web of the middle corbel 302 is vertically arranged and perpendicular to the web of the crane beam 301.

[0124] The connections between the third extension plate 601 and the upper flange plate of the corresponding crane beam 301, between the fourth extension plate 602 and the corresponding upper connecting plate 303, between the second connecting plate 603 and the upper flange plate of the corresponding intermediate corbel 302, between the second connecting plate 603 and the corresponding lower connecting plate 304, and between the upper flange plate of the intermediate corbel 302 and the lower flange plates of the two crane beams 301 can be made using various connection methods, including welding, high-strength bolts, or a combination of high-strength bolts and welding. The specific connection method depends on actual needs. Generally, high-strength bolts are preferably used in these locations to reduce welding volume and improve fatigue resistance.

[0125] Specifically, during installation, part of the third extension plate 601 covers the upper surface of the upper flange plate of the crane beam 301 and is connected by high-strength bolts; the height of the fourth extension plate 602 is lower than that of the third extension plate 601, and the end of the fourth extension plate 602 is abutted against the lower surface of the corresponding upper connecting plate 303 and is connected by high-strength bolts; part of the second connecting plate 603 covers the upper surface of the corresponding lower connecting plate 304, and part of it covers the upper surface of the upper flange plate of the middle corbel 302 and is connected by high-strength bolts; the upper flange plate of the middle corbel 302 of the lower single-node structure 600 is abutted against the lower surface of the lower flange plate of the crane beam 301 and is connected by high-strength bolts.

[0126] Further optionally, a second middle stiffening plate 3015 is provided on both sides of the web of each crane beam 301 corresponding to the web of each vertical web member 202 of the lower single node structure 600 to improve the structural strength and bearing capacity.

[0127] The above-mentioned three types of node structures (end node structure 400, lower combined node structure 500 and lower single node structure 600) on the lower chord structure 300, in actual application, according to the different number of internodes of the entire crane truss structure and the different arrangement and connection methods of the diagonal web members 201, the number of lower combined node structures 500 and lower single node structures 600 connected to the lower chord structure 300 is also different, but generally two end node structures 400 are set at both ends of the lower chord structure 300, and at least one lower combined node structure 500 is set between the two ends of the lower chord structure 300. The lower combined node structure 500 connects the lower end of a vertical web member 202 and the lower end of a diagonal web member 201, or the lower combined node structure 500 connects the lower end of a vertical web member 202 and the lower ends of two diagonal web members 201 located on both sides of the vertical web member 202; the lower single node structure 600 may not be set on the lower chord structure 300, or at least one lower single node structure 600 may be set. The specific arrangement depends on actual needs.

[0128] Further optionally, a third middle stiffening plate 3021 is provided on both sides of the web of each middle corbel 302, facing the position of the lower combined node plate 501 in each lower combined node structure 500, and facing the flange plate of the vertical web member 202 corresponding to the lower single node structure 600. The plate surface of the third middle stiffening plate 3021 is parallel to the web of the crane beam 301 to improve the structural strength.

[0129] The upper combined node structure 700 and the upper single node structure 800 on the upper chord structure 100 are as follows:

[0130] Upper combined node structure 700:

[0131] Reference Figure 24 A plurality of upper combined node structures 700 are provided on the upper chord structure 100, each of which is connected to a corresponding vertical web member 202 and at least one corresponding diagonal web member 201; each upper combined node structure 700 includes two upper combined node plates 701 arranged in parallel and spaced apart, the two upper combined node plates 701 being connected in series in the upper chord structure 100, a first horizontal web plate 702 being connected between the upper portions of the two upper combined node plates 701, and the first horizontal web plate 702 being arranged opposite to the corresponding web plate in the upper chord structure 100.

[0132] The lower part of each upper combined node plate 701 includes an upper straight node vertical plate 7011 and at least one third inclined node vertical plate 7012 connected to each other. A first upper straight node web 703 is connected between the two upper straight node vertical plates 7011 arranged oppositely in each upper combined node structure 700, and an upper inclined node web 704 is connected between the two third inclined node vertical plates 7012 arranged oppositely in each lower combined node structure 500; the two flange plates of the vertical web member 202 are respectively connected to the two upper straight node vertical plates 7011 arranged oppositely in the corresponding upper combined node structure 700, and the web of the vertical web member 202 is connected to the corresponding first upper straight node web 703; the two flange plates of the diagonal web member 201 are respectively connected to the two third inclined node vertical plates 7012 arranged oppositely in the corresponding upper combined node structure 700, and the web of the diagonal web member 201 is connected to the corresponding upper inclined node web 704.

[0133] Generally, the various parts of the upper composite gusset plate 701 are integrally formed. Typically, the upper composite gusset plate 701 includes an integrally formed upper straight gusset plate 7011 and a third oblique gusset plate 7012. Alternatively, the upper composite gusset plate 701 includes an integrally formed upper straight gusset plate 7011 and two third oblique gusset plates 7012 symmetrically distributed on either side of the upper straight gusset plate 7011. The number of first horizontal webs 702 is the same as the number of webs in the upper chord structure 100. For example, when the upper chord structure 100 employs an H-shaped cross-section, the upper chord structure 100 has one horizontally arranged web, and the number of first horizontal webs 702 is also one. Generally, the flange plates and web plates of the upper chord structure 100 are both disconnected at the position of the upper combined node plate 701. The plate surface of the upper combined node plate 701 is vertical and aligned with the corresponding flange plates of the upper chord structure 100. The upper ends of the upper combined node plate 701 are welded and fixed to the corresponding flange plates of the upper chord structure 100 at the disconnected position, and the first horizontal web plate 702 is welded and fixed to the corresponding web plates of the upper chord structure 100 at the disconnected position.

[0134] The number of first upper straight node webs 703 is the same as the number of webs in the vertical web members 202, and the number of upper oblique node webs 704 in the two opposing third oblique node vertical plates 7012 is the same as the number of webs in the corresponding diagonal web members 201. The plate surfaces of the first upper straight node webs 703 are arranged vertically and perpendicular to the length direction of the crane beam 301. The upper ends of the first upper straight node webs 703 are connected to the first horizontal webs 702, and the lower ends of the first upper straight node webs 703 extend to the lower edge of the upper combined gusset plate 701. The plate surfaces of the upper oblique node webs 704 are arranged at an angle, and the lower ends of the upper oblique node webs 704 are aligned with the webs of the corresponding diagonal web members 201. The upper ends of the upper oblique node webs 704 can be connected to the upper side surfaces of the first upper straight node webs 703. Generally, the first horizontal web 702 is welded and fixed to the two upper combined node plates 701, the upper end of the first upper straight node web 703 is welded and fixed to the first horizontal web 702, the first upper straight node web 703 is welded and fixed to the upper straight node vertical plate 7011, the upper inclined node web 704 is welded and fixed to the third inclined node vertical plate 7012, and the upper end of the upper inclined node web 704 can be welded and fixed to the upper side of the first upper straight node web 703.

[0135] As needed, the upper combined node plate 701 can be integrally formed with the corresponding flange plates of the vertical web members 202 and the corresponding flange plates of each diagonal web member 201, thereby improving the structural stability. In this case, the upper combined node plate 701 integrally formed and extended from each web member is expanded to serve as part of the flange plate of the upper chord structure 100.

[0136] Alternatively, in the upper combined node structure 700, different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding hybrid connection can be used between the flange plate of the vertical web member 202 and the corresponding upper straight node vertical plate 7011, between the web plate of the vertical web member 202 and the corresponding first upper straight node web plate 703, between the flange plate of the diagonal web member 201 and the corresponding third diagonal node vertical plate 7012, and between the web plate of the diagonal web member 201 and the corresponding upper diagonal node web plate 704. Compared with the integral molding of the upper combined node plate 701 and the flange plate of the vertical web member 202 and the flange plate of the diagonal web member 201, the separate processing and connection method can save more materials. The specific connection method depends on the actual needs, for example Figure 24 The upper straight node riser 7011 and the first upper straight node web 703 are connected to the vertical web member 202, and the third oblique node riser 7012 and the upper oblique node web 704 are connected to the corresponding oblique web member 201 by welding. Figure 25 As shown in the figure, the upper straight node riser 7011 and the first upper straight node web 703 are connected to the vertical web member 202, and the third oblique node riser 7012 and the upper oblique node web 704 are connected to the corresponding oblique web member 201 by friction type high-strength bolts.

[0137] Optionally, a first upper stiffening plate 705 is further provided on the top surface of the first horizontal web 702 opposite to the first upper straight node web 703 to improve the structural strength.

[0138] Single node structure 800:

[0139] Reference Figure 26 At least one upper single-node structure 800 is provided on the upper chord structure 100, and each upper single-node structure 800 is connected to a corresponding vertical web member 202; each upper single-node structure 800 includes two single-node vertical plates 801 arranged in parallel and spaced apart, and the two single-node vertical plates 801 are connected in series in the upper chord structure 100, and a second horizontal web 802 is connected between the upper parts of the two upper single-node vertical plates 801, and the second horizontal web 802 is arranged opposite to the corresponding web in the upper chord structure 100; a second upper straight node web 803 is also connected between the lower parts of the two single-node vertical plates 801, and the two flange plates of the vertical web member 202 are respectively connected to the corresponding two single-node vertical plates 801, and the web of the vertical web member 202 is connected to the corresponding second upper straight node web 803.

[0140] The number of second horizontal webs 802 is the same as the number of webs in the upper chord structure 100. For example, when the upper chord structure 100 adopts an H-shaped cross-section, the upper chord structure 100 has one horizontally arranged web, and the number of second horizontal webs 802 is also one. Generally, the flanges and webs of the upper chord structure 100 are disconnected at the location of the single-node vertical plate 801. The plate surface of the single-node vertical plate 801 is vertical and aligned with the corresponding flange of the upper chord structure 100. The upper ends of the single-node vertical plate 801 are welded to the corresponding flange of the upper chord structure 100 at the disconnected location. The second horizontal webs 802 are welded to the corresponding web of the upper chord structure 100 at the disconnected location.

[0141] The number of second upper straight node webs 803 in the upper single-node structure 800 is the same as the number of webs in the vertical web members 202. The plate surfaces of the second upper straight node webs 803 are arranged vertically and perpendicular to the length direction of the crane beam 301. The upper ends of the second upper straight node webs 803 are connected to the second horizontal webs 802, and the lower ends of the second upper straight node webs 803 extend to the lower edge of the single-node vertical plates 801. Generally, the second horizontal webs 802 are welded to the two upper single-node vertical plates 801, the upper ends of the second upper straight node webs 803 are welded to the second horizontal webs 802, and the second upper straight node webs 803 are welded to the upper single-node plate.

[0142] As needed, the upper single node vertical plate 801 can be integrally formed with the corresponding flange plate of the vertical web member 202, which provides better structural stability. In this case, the upper single node vertical plate 801 integrally formed and extended from the vertical web member 202 is extended as a part of the flange plate of the upper chord structure 100. Alternatively, in the upper single node structure 800, different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding mixed connection can be used between the flange plate of the vertical web member 202 and the corresponding upper straight node vertical plate 7011, and between the web plate of the vertical web member 202 and the corresponding second upper straight node web plate 803. Compared with the integral molding of the upper single node vertical plate 801 with the flange plate of the vertical web member 202 and the flange plate of the diagonal web member 201, the separate processing and connection method saves more materials. The specific connection method depends on the actual needs, for example Figure 26 In the upper single node structure 800 shown in FIG, the upper straight node vertical plate 7011 and the second upper straight node web plate 803 are all connected to the vertical web member 202 by welding.

[0143] Optionally, a second upper stiffening plate 804 is further provided on the top surface of the second horizontal web 802 opposite to the second upper straight node web 803 to improve the structural strength.

[0144] The above-mentioned two types of node structures (upper combined node structure 700 and upper single node structure 800) on the upper chord structure 100, in actual applications, according to the different number of internodes of the entire crane truss structure and the different arrangement and connection methods of the diagonal web members 201, the number of upper combined node structures 700 and upper single node structures 800 connected to the upper chord structure 100 is also different, but generally at least two upper combined node structures 700 are set between the two ends of the upper chord structure 100, the upper single node structure 800 may not be set, or at least one single node structure may be set. The specific arrangement depends on actual needs.

[0145] Further optional, see Figure 1 The upper chord structure 100 includes an intermediate chord 101 and two connecting rods 102. The first end of the connecting rod 102 is connected to the corresponding end of the intermediate chord 101, and the second end of the connecting rod 102 is used to connect to the corresponding factory building upper column 9021, and the cross-sectional area of ​​the connecting rod 102 is smaller than the cross-sectional area of ​​the intermediate chord 101.

[0146] The length of the middle chord 101 is shorter than the length of the lower chord structure 300 (i.e., the length of the crane beam 301). The length of the entire upper chord structure 100 is approximately the same as that of the lower chord structure 300. The two ends of each connecting rod 102 are respectively connected to the corresponding end of the middle chord 101 and the corresponding factory building upper column 9021. Each node structure in the upper chord structure 100 is provided on the middle chord 101. The upper ends of the diagonal web members 201 and the upper ends of the vertical web members 202 are both connected to the corresponding node structures on the middle chord 101. Since the upper chord end internodes are generally unloaded components, the entire upper chord is composed of an middle chord 101 with different cross-sectional areas and two connecting rods 102, forming a variable cross-sectional structure and avoiding material waste.

[0147] Generally, two upper combined node structures 700 are set at the connection between the middle chord 101 and the two connecting rods 102. The two ends of the upper combined node plate 701 of the upper combined node structure 700 are respectively welded and fixed to the corresponding flange plates of the middle chord 101 and the corresponding flange plates of the connecting rods 102; the upper single node structure 800 may not be set between the two ends of the middle chord 101, or at least one set of upper single node structures 800 may be set.

[0148] Furthermore, the connection node between the upper chord structure 100 and the web assembly is used to connect the corresponding roof beam 901; or the connection node between the upper chord structure 100 and the web assembly is used to connect the upper chord of the roof truss, and a part of the vertical web members 202 are used to connect the lower chord of the roof truss.

[0149] The intersections of the upper chord structure 100 and the web members (i.e., corresponding to the node structures on the upper chord structure 100) are used to connect to the roof beams 901 (or to connect to the upper chord of the roof truss), and can bear the roof load transmitted by the roof beams 901 (or roof truss). The roof beams 901 (or roof truss) can serve as lateral support for the upper chord structure 100. When the upper chord structure 100 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 202. For the traditional crane truss structure using a solid-web crane beam structure or a crane beam and truss combination, they are all arranged below the crane track surface. These traditional structures require a separate roof bracket to bear the roof load transmitted by the roof beam 901 (or roof truss). In order to maintain the longitudinal stability of the factory building, upper column supports and inter-column supports need to be set in the longitudinal force system of the factory building; in the structure of the present application, the upper chord structure 100 is used to connect the roof beam 901 or the upper chord of the roof truss, and the vertical web member 202 can be used to connect the lower chord of the roof truss. The entire crane truss structure can replace part of the roof bracket of the factory building, and the web member assembly can replace part of the upper column support of the factory building.

[0150] In terms of load bearing, the roof load transmitted from the roof beam 901 or roof truss is transmitted through the various node structures on the upper chord structure 100 to the entire structure consisting of the upper chord structure 100, the web member assembly, and the lower chord structure 300, and then transmitted to the ground through the factory corbels 9023 and the factory lower columns 9022 at both ends. At the same time, the crane load transmitted from the crane is transmitted through the crane beam 301 to the entire structure consisting of the upper chord structure 100, the web member assembly, and the lower chord structure 300, and then transmitted to the ground through the factory corbels 9023 and the factory lower columns 9022 at both ends. The load bearing capacity is clear. Moreover, 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.

[0151] Further optionally, the thickness of the upper connecting plate 303 is smaller than the thickness of the upper flange plate of the crane beam 301 , and the thickness of the lower connecting plate 304 is smaller than the thickness of the lower flange plate of the crane beam 301 .

[0152] The upper connecting plates 303 and the lower connecting plates 304 are both rectangular plates and are arranged along the length of the crane beam 301. Multiple upper connecting plates 303 are spaced apart along the length of the crane beam 301, and multiple lower connecting plates 304 are spaced apart along the length of the crane beam 301. Typically, the upper and lower flanges of the crane beam 301 have the same thickness. Both the upper connecting plates 303 and the lower connecting plates 304 are made of thin steel plates, approximately half the thickness of the upper flange of the crane beam 301. Typically, the upper and lower flanges of the crane beam 301 are 20 mm to 30 mm thick, while the upper and lower connecting plates 303 and 304 are 10 mm to 15 mm thick.

[0153] From the perspective of force, the plates close to each node structure contribute more to the strength of the component, and the upper connecting plate 303 and the lower connecting plate 304 are located between two adjacent node structures and contribute less to the strength of the component. Therefore, the upper connecting plate 303 and the lower connecting plate 304 are both thin plates, which can reduce the amount of steel used and reduce material waste.

[0154] Further optionally, in order to further improve the stability of the box-section structure formed by the two crane beams 301, the upper connecting plate 303 and the lower connecting plate 304, refer to Figure 1 as well as Figures 27 to 30 A plurality of intermediate plates 305 are provided between the two crane beams 301. The intermediate plates 305 are located between two adjacent intermediate corbels 302, or between the plant corbel 9023 and the corresponding intermediate corbel 302. A maintenance manhole 3051 is provided in the middle of the intermediate plate 305. The intermediate plate 305 is connected to the upper connecting plate 303, the lower connecting plate 304 and the webs of the two crane beams 301.

[0155] The surface of the intermediate plate 305 is perpendicular to the web of the crane beam 301. Since the entire lower chord structure 300 is a box-shaped section formed by two continuous crane beams 301, the upper connecting plate 303, and the lower connecting plate 304, multiple intermediate plates 305 are arranged between the two crane beams 301 along their length. This improves the integrity and rigidity of the lower chord structure 300 and prevents deformation of the lower chord structure 300. The provision of an inspection manhole 3051 facilitates maintenance operations for operators.

[0156] Further optionally, an annular reinforcing stiffening plate 3052 is further provided on the wall of the inspection manhole 3051. The axial direction of the reinforcing stiffening plate 3052 is parallel to the length direction of the crane beam 301, and the reinforcing stiffening plate 3052 can play a reinforcing role on the position of the inspection manhole 3051.

[0157] Further optionally, in order to facilitate the connection between the middle plate 305 and the crane beam 301, the upper connecting plate 303 and the lower connecting plate 304, the middle plate 305 includes a rectangular plate 3053, an upper T-shaped plate 3054 and a lower T-shaped plate 3055, and the three can be formed as one piece, and the upper T-shaped plate 3054 and the lower T-shaped plate 3055 both include a horizontal cross plate and a vertical vertical plate; the upper T-shaped plate 3054 is located at the top of the rectangular plate 3053, and its vertical plate is directly connected to the rectangular plate 3053, and its cross plate is abutted against the lower surface of the corresponding upper connecting plate 303 and is connected to the upper connecting plate 303 by high-strength bolts; the lower T-shaped plate 3055 is located at the bottom of the rectangular plate 3053, and its vertical plate is directly connected to the rectangular plate 3053, and its cross plate is abutted against the upper surface of the corresponding lower connecting plate 304 and is connected to the lower connecting plate 304 by high-strength bolts. The side edges of the rectangular plate 3053 are welded to the web of the corresponding crane beam 301, and the upper and lower edges of the rectangular plate 3053 are welded to the upper and lower flanges of the corresponding crane beam 301. During installation, gaps are generally left between the side edges, upper edge, and lower edge of the rectangular plate 3053 of the intermediate plate 305 and the web, upper flange, and lower flange of the corresponding crane beam 301, respectively. These three locations are then welded using split-cut welding.

[0158] Further optionally, an outer stiffening plate 3016 is provided on the outer side of the web of the crane beam 301 opposite to the middle plate 305 to further improve the stability of the lower chord structure 300 .

[0159] It should be noted that the "multiple" mentioned in this article refers to at least two, and the "super-large span" mentioned in this article refers to a crane truss span of more than 36m. Of course, the specific definition of the super-large span shall be based on the range commonly known in the industry.

[0160] In summary, the crane truss structure of this embodiment is an ultra-long-span crane truss structure. It utilizes two crane beams 301 with brackets as the lower chord structure 300. The upper chord structure 100 can replace part of the factory building's roof brackets, and the web member assembly can replace part of the factory building's upper column supports, forming a three-in-one system of lower chord crane beams, upper chord brackets, and web members. The lower chord structure 300 utilizes two parallel crane beams 301, which are connected to each web member using corresponding node structures. The end node structure 400 on the lower chord structure 300 connects the diagonal web members 201 at the end to the lower chord structure 300. The lower combined node structure 500 and the lower single node structure 600 on the lower chord structure 300 connect the remaining diagonal web members 201 and vertical web members 202 to the crane beam 301 and the middle corbel 302 perpendicular to the crane beam 301. The middle corbel 302 is connected to the lower flange of the crane beam 301, serving as an intermediate support for the crane beam 301. It also connects the crane beam 301 of the lower chord structure 300 and the upper chord structure 100 through corresponding web members and node structures into a single load-bearing entity. The node structures on the upper chord structure 100 connect the diagonal web members 201 and vertical web members 202 to the upper chord structure 100. The two crane beams 301 in the lower chord structure 300 and the thin steel plates on the upper and lower flanges of the crane beam 301 form a box section. The web members of the ultra-long-span crane truss are connected to the upper chord structure 100 and the lower chord structure 300 by welding or high-strength bolts, enabling modular production and installation. The web members of the truss of this application are connected to intermediate brackets 302, allowing them to be manufactured and transported separately from the crane beam 301 of the lower chord structure 300. High-strength bolts are then used to connect the intermediate brackets 302 to the crane beam 301 on-site, facilitating construction. Furthermore, the intermediate brackets 302 below the web members are connected to the crane beam 301 via high-strength bolts, providing superior fatigue resistance.

[0161] The entire structure is suitable for crane beams 301 with extremely large spans after column removal in industrial plants. This system integrates roof brackets, upper column supports, and a crane beam system, offering advantages such as simple construction, clear force distribution, large spans, reduced steel usage, and a simple and aesthetically pleasing appearance. Analysis and comparison have shown that compared to existing solid-web crane beams, this system saves over 30% in steel, offering significant economic advantages. Furthermore, this system allows for modular production, facilitating transportation and installation. Its market value is further enhanced when high-strength bolt connections are used. It also addresses the issue of existing crane trusses generally not exceeding a span of 36 meters, and the problem of existing crane trusses occupying a significant amount of space below the crane rail surface. The entire structure is suitable for spans exceeding 36 meters, such as spans of 50 or 60 meters. Of course, it is also applicable to spans less than 36 meters.

[0162] The above is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention should fall within the scope of protection of the present invention.

Claims

1. A crane truss structure with a lower chord of a crane beam with a bracket, characterized in that: The crane comprises an upper chord structure, a web assembly, and a lower chord structure connected sequentially from top to bottom. The lower chord structure comprises two crane beams spaced apart in parallel and a plurality of intermediate corbels provided at the bottom of the two crane beams. The crane beams are of an I-shaped cross-section. The top surface of the upper flange plate of the crane beam is used to mount a crane rail. A plurality of upper connecting plates are connected between the upper flange plates of the two crane beams. A plurality of lower connecting plates are connected between the lower flange plates of the two crane beams. The intermediate corbels are located between two corresponding adjacent lower connecting plates. The two ends of the crane beam are used to connect to the corresponding factory building corbels, and the web member assembly includes a plurality of diagonal web members and a plurality of vertical web members connected between the upper chord structure and the lower chord structure; a plurality of node structures are provided on both the upper chord structure and the lower chord structure, and the middle corbel is arranged opposite to the corresponding node structure on the lower chord structure, and the two ends of the diagonal web member are connected to the corresponding node structure, and the two ends of the vertical web member are connected to the corresponding node structure.

2. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 1, characterized in that: The number of the vertical web members is the same as the number of the middle corbels, and the plurality of vertical web members are respectively arranged directly above the plurality of middle corbels. Between two adjacent vertical web members, one diagonal web member is provided or two diagonal web members are arranged crosswise, and the ends of a part of the vertical web members are connected to the same node structure with the ends of one or two adjacent diagonal web members.

3. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 1, characterized in that: 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 connected by high-strength bolts, or by a combination of high-strength bolts and welding.

4. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 1, characterized in that: The upper chord structure, the diagonal web members and the vertical web members are H-shaped sections or box-shaped sections, and each of the upper chord structure, the diagonal web members and the vertical web members includes two flange plates and one or two web plates.

5. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 4, characterized in that: Two end node structures are provided at both ends of the lower chord structure, and each of the end node structures is connected to a corresponding diagonal web member; each of the end node structures includes two first diagonal node vertical plates arranged in parallel and at intervals, and the two first diagonal node vertical plates are connected to the two crane beams through a first connecting assembly, and a first lower diagonal node web is connected between the two first diagonal node vertical plates; the two flange plates of the diagonal web member are respectively connected to the two first diagonal node vertical plates arranged opposite to each other in the corresponding end node structure, and the web of the diagonal web member is connected to the corresponding first lower diagonal node web plate.

6. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 5, characterized in that: The first connecting assembly includes an upper wing connecting plate connected between the upper flange plates of the two crane beams and a lower wing connecting plate connected between the lower flange plates of the two crane beams. Two spaced-apart partitions are connected between the upper wing connecting plate and the lower wing connecting plate. The first oblique node vertical plate passes through the upper wing connecting plate into the space between the two partitions and is connected to the upper wing connecting plate, the lower wing connecting plate and the two partitions.

7. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 6, characterized in that: The upper wing connecting plate is connected to the upper connecting plate by high-strength bolts, the lower wing connecting plate is connected to the lower connecting plate by high-strength bolts, the upper wing connecting plate is welded to the upper flange plates of the two crane beams, and the lower wing connecting plate is welded to the lower flange plates of the two crane beams; The plate surface of the partition is perpendicular to the web of the crane beam, the top and bottom ends of the partition are respectively welded to the upper flange plate and the lower flange plate of the two crane beams, and the two side ends of the partition are respectively welded to the webs of the two crane beams; two open grooves are provided on the upper wing connecting plate, and the first inclined node vertical plate can pass through the corresponding open grooves, and the first inclined node vertical plate is welded to the upper wing connecting plate, the lower wing connecting plate and the two partitions.

8. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 4, characterized in that: At least one lower combined node structure is provided on the lower chord structure, each of the lower combined node structures is connected to a corresponding vertical web member and at least one corresponding diagonal web member; each of the lower combined node structures includes two lower combined node plates arranged in parallel and spaced apart, and the two lower combined node plates are connected to the two crane beams via a second connecting assembly; Each of the lower combined node plates includes a connected lower straight node vertical plate and at least one second oblique node vertical plate; a lower straight node web is connected between two relatively arranged lower straight node vertical plates in each of the lower combined node structures; a second lower oblique node web is connected between two relatively arranged second oblique node vertical plates in each of the lower combined node structures; the two flange plates of the vertical web members are respectively connected to the two relatively arranged lower straight node vertical plates in the corresponding lower combined node structure, and the webs of the vertical web members are connected to the corresponding lower straight node webs; the two flange plates of the diagonal web members are respectively connected to the two relatively arranged second oblique node vertical plates in the corresponding lower combined node structure, and the webs of the diagonal web members are connected to the corresponding second lower oblique node webs.

9. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 8, characterized in that: The second connection assembly includes two first extension plates arranged on both sides of the top of the two lower straight node vertical plates and two second extension plates arranged on both sides of the lower straight node web plate, the two first extension plates are connected to the upper flange plates of the two crane beams, and the two second extension plates are connected to the corresponding two upper connection plates; two first connecting plates are also spaced apart on both sides of the bottom of the two lower straight node web plates, and the first connecting plates are connected to the upper flange plates of the corresponding middle corbels and the corresponding lower connection plates.

10. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 9, characterized in that: The first extension plate and the corresponding upper flange plate of the crane beam, the second extension plate and the corresponding upper connecting plate, the first connecting plate and the corresponding upper flange plate of the middle corbel, the first connecting plate and the corresponding lower connecting plate, and the upper flange plate of the middle corbel and the lower flange plates of the two crane beams are all connected by high-strength bolts.

11. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 4, characterized in that: At least one lower single-node structure is provided on the lower chord structure, and each lower single-node structure is connected to a corresponding vertical web member; the lower end of the vertical web member passes downward through the corresponding two adjacent upper connecting plates and the corresponding two adjacent lower connecting plates in sequence, and is connected to the upper flange plate of the corresponding middle corbel; Each of the lower single-node structures includes two third extension plates arranged on both sides of the two flange plates of the vertical web members and two fourth extension plates arranged on both sides of the web of the vertical web members, the two third extension plates are connected to the upper flange plates of the two crane beams, and the two fourth extension plates are connected to the corresponding two upper connecting plates; two second connecting plates are also provided at the top of the middle corbel and on both sides of its web, the second connecting plates are connected to the upper flange plates of the middle corbel and the corresponding lower connecting plates.

12. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 11, characterized in that: The third extension plate and the corresponding upper flange plate of the crane beam, the fourth extension plate and the corresponding upper connecting plate, the second connecting plate and the corresponding upper flange plate of the middle corbel, the second connecting plate and the corresponding lower connecting plate, and the upper flange plate of the middle corbel and the lower flange plates of the two crane beams are all connected by high-strength bolts.

13. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 4, characterized in that: A plurality of upper combined node structures are provided on the upper chord structure, each of the upper combined node structures being connected to a corresponding vertical web member and at least one corresponding diagonal web member; each of the upper combined node structures comprises two upper combined node plates arranged in parallel and spaced apart from each other, the two upper combined node plates being connected in series in the upper chord structure, a first horizontal web being connected between the upper portions of the two upper combined node plates, the first horizontal web being arranged opposite to the corresponding web plate in the upper chord structure; The lower part of each upper combined node plate includes a connected upper straight node vertical plate and at least one third inclined node vertical plate; a first upper straight node web is connected between two upper straight node vertical plates arranged oppositely in each upper combined node structure; an upper inclined node web is connected between two third inclined node vertical plates arranged oppositely in each upper combined node structure; the two flange plates of the vertical web members are respectively connected to the two upper straight node vertical plates arranged oppositely in the corresponding upper combined node structure, and the web of the vertical web members is connected to the corresponding first upper straight node web; the two flange plates of the diagonal web members are respectively connected to the two third inclined node vertical plates arranged oppositely in the corresponding upper combined node structure, and the web of the diagonal web members is connected to the corresponding upper inclined node web.

14. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 13, characterized in that: In the upper combined node structure, the flange plates of the vertical web members and the corresponding upper straight node vertical plates, the web plates of the vertical web members and the corresponding first upper straight node web plates, the flange plates of the diagonal web members and the corresponding third diagonal node vertical plates, and the web plates of the diagonal web members and the corresponding upper diagonal node web plates are fixed by welding, connected by high-strength bolts, or connected by a combination of high-strength bolts and welding.

15. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 4, characterized in that: At least one upper single node structure is provided on the upper chord structure, and each upper single node structure is connected to a corresponding one of the vertical web members; Each of the upper single-node structures includes two single-node vertical plates arranged in parallel and at intervals, and the two single-node vertical plates are connected in series in the upper chord structure. A second horizontal web is connected between the upper parts of the two upper single-node vertical plates, and the second horizontal web is arranged opposite to the corresponding web in the upper chord structure; a second upper straight node web is also connected between the lower parts of the two single-node vertical plates, and the two flange plates of the vertical web members are respectively connected to the corresponding two single-node vertical plates, and the web of the vertical web member is connected to the corresponding second upper straight node web.

16. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 15, characterized in that: The flange plates of the vertical web members in the upper single node structure and the corresponding single node vertical plates, as well as the web plates of the vertical web members and the corresponding second upper straight node web plates, are fixed by welding, connected by high-strength bolts, or connected by a combination of high-strength bolts and welding.

17. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 1, characterized in that: The upper chord structure includes an intermediate chord and two connecting rods, wherein 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, and the cross-sectional area of ​​the connecting rod is smaller than the cross-sectional area of ​​the intermediate chord.

18. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 1, characterized in that: 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 portion of the vertical web members are used to connect the lower chord of the roof truss.

19. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 1, characterized in that: The cross-sectional height of the crane beam is ≤2.5m.

20. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 1, characterized in that: The thickness of the upper connecting plate is smaller than the thickness of the upper flange plate of the crane beam, and the thickness of the lower connecting plate is smaller than the thickness of the lower flange plate of the crane beam.

21. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 1, characterized in that: A plurality of intermediate plates are further provided between the two crane beams, wherein the intermediate plates are located between two adjacent intermediate corbels, or between the plant corbel and the corresponding intermediate corbel; A maintenance manhole is provided in the middle of the middle plate, and the middle plate is connected to the upper connecting plate, the lower connecting plate and the webs of the two crane beams.

22. The crane truss structure with a lower chord of a crane beam with a corbel as claimed in claim 21, characterized in that: An annular reinforcing plate is also provided on the wall of the inspection manhole.

Images