Crane truss structure combining bearing truss and crane beam

Abstract

The invention relates to a crane truss structure combining a bearing truss and a crane beam, which comprises a lower chord member, a web member assembly and an upper chord member, two crane beams are arranged on two sides of the lower chord member; a plurality of middle brackets are connected to the bottom of the lower chord member at intervals in the length direction of the lower chord member, a lower flange plate of the crane beam is connected with the middle brackets, and the two ends of the crane beam and the two ends of the lower chord member are used for being connected with the corresponding workshop brackets; an upper connecting plate is connected between the upper flange plate of the crane beam and the upper flange plate of the lower chord member, and a lower connecting plate is connected between the lower flange plate of the crane beam and the lower flange plate of the lower chord member; the web member assembly comprises a plurality of diagonal web members and a plurality of vertical web members which are connected between the upper chord member and the lower chord member. The large span requirement can be met, the occupied space below the rail surface is small, the structure is stable, the bearing capacity is high, the steel consumption is small, and transportation and installation are convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial buildings, and in particular to a crane truss structure combining a load-bearing truss with a crane beam. 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 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:

[0007] (1) The lower chord of the patent is an integral box section. When the transverse partition is welded inside the box section, there are many hidden welds, and the welding quality cannot be guaranteed; (2) The lower chord of the patent is a complete box section, which is difficult to pass through and cannot arrange process pipelines; (3) 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.

[0008] For another example, patent CN217676413U discloses a large-span crane truss structure. The web members of this patent are arranged in a W-shape, without vertical web members; the lower chord of this patent is an integral box-shaped section; and the upper chord section of this patent is a uniform section. However, this patent has the following disadvantages:

[0009] (1) The web members of the patent are arranged in a W-shape, without vertical web members, 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; (2) Since the lower chord of the patent is an integral box-shaped section, when welding, it is often impossible to weld due to the closed nature of the section, or the welding does not meet the welding quality requirements; secondly, the flange of the box-shaped section is generally thicker, and the middle part contributes less to the strength of the component, and the amount of steel used is large; thirdly, since the lower chord is a closed section, there are many hidden welds when processing the connection node plate between the web member and the lower chord, which affects the welding quality; (3) The upper chord of the patent is a uniform section, and the influence of internal force changes on the section is not considered. The section size is not adjusted according to the internal force changes, resulting in material waste; in addition, the end section of the upper chord is generally a stress-free component, and using the same section as the middle section causes waste.

[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 combining a load-bearing truss and a crane beam 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 combining a load-bearing truss and a crane beam, which can achieve large span requirements, occupy less space below the rail surface, has a stable structure, strong load-bearing capacity, uses less steel, and is easy to transport and install.

[0012] The object of the present invention is achieved in this way: a crane truss structure combining a load-bearing truss and a crane beam comprises a lower chord, a web assembly and an upper chord connected in sequence from bottom to top, wherein the lower chord is a box-shaped section; two crane beams are arranged parallel and symmetrically on both sides of the lower chord, the crane beams are I-shaped sections, and the top surface of the upper flange plate of the crane beam is used to install the crane rail; a plurality of intermediate brackets are connected at intervals along the length direction of the bottom of the lower chord, the lower flange plate of the crane beam is connected to the intermediate bracket, and the two ends of the crane beam and the lower chord are connected. The two ends are used to connect the corresponding factory building brackets; an upper connecting plate is connected between the upper flange plate of the crane beam and the upper flange plate of the lower chord, and a lower connecting plate is connected between the lower flange plate of the crane beam and the lower flange plate of the lower chord; the web member assembly includes a plurality of diagonal web members and a plurality of vertical web members connected between the upper chord and the lower chord; the connection node between the upper chord and the web member assembly is used to connect the corresponding roof beam; or the connection node between the upper chord and the web member assembly is used to connect the upper chord of the roof truss, and at least part of the vertical web members are used to connect the lower chord of the roof truss.

[0013] In a preferred embodiment of the present invention, the upper chord 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.

[0014] In a preferred embodiment of the present invention, multiple node structures are provided on both the upper chord and the lower chord, and the ends of the diagonal web members and the corresponding node structures, as well as the ends of the vertical web members and the corresponding node structures, are fixed by welding, connected by high-strength bolts, or connected by a combination of high-strength bolts and welding.

[0015] 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.

[0016] In a preferred embodiment of the present invention, stiffening plates are provided in the box section of the lower chord and on both sides of the web of the crane beam at positions corresponding to the factory corbels and the intermediate corbels.

[0017] In a preferred embodiment of the present invention, the diagonal web members and the vertical web members are H-shaped sections or box-shaped sections, and each of the diagonal web members and the vertical web members includes two flange plates and one or two web plates.

[0018] In a preferred embodiment of the present invention, at least one combined node structure is provided on the lower chord, and each combined node structure is connected to a corresponding vertical web and at least one corresponding diagonal web; each combined node structure includes two combined node plates arranged in parallel and spaced apart, and the two combined node plates are formed by extending upward from the two webs of the lower chord; each combined node plate includes a connected straight node vertical plate and at least one diagonal node vertical plate, and a straight node web is connected between the two relatively arranged straight node vertical plates in each combined node structure, and an diagonal node web is connected between the two relatively arranged diagonal node vertical plates in each combined node structure; the two flange plates of the vertical web are respectively connected to the two relatively arranged straight node vertical plates in the corresponding combined node structure, and the web of the vertical web is connected to the corresponding straight node web; the two flange plates of the diagonal web are respectively connected to the two relatively arranged diagonal node vertical plates in the corresponding combined node structure, and the web of the diagonal web is connected to the corresponding diagonal node web.

[0019] In a preferred embodiment of the present invention, two end node structures are provided at both ends of the lower chord, and each end node structure is connected to a corresponding diagonal web member; each end node structure includes two diagonal node vertical plates arranged in parallel and spaced apart, and the two diagonal node vertical plates are formed by extending upward from the two webs of the lower chord, and an diagonal node web is connected between the two diagonal node vertical plates; the two flange plates of the diagonal web member are respectively connected to the two 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 diagonal node web.

[0020] In a preferred embodiment of the present invention, at least one single-node structure is provided on the lower chord, and each single-node structure is connected to a corresponding vertical web member; each single-node structure includes two straight node vertical plates arranged in parallel and spaced apart, the two straight node vertical plates extending upward from the two webs of the lower chord, and a straight node web is connected between the two straight node vertical plates; the two flange plates of the vertical web member are respectively connected to the two straight node vertical plates arranged opposite to each other in the corresponding single-node structure, and the web of the vertical web member is connected to the corresponding straight node web.

[0021] In a preferred embodiment of the present invention, the height between the top surface of the crane beam and the bottom surface of the middle corbel is 2m-2.5m.

[0022] In a preferred embodiment of the present invention, each crane beam is a multi-span continuous beam; or each crane beam includes multiple single-span crane beams, and the end of each single-span crane beam is connected to the corresponding middle bracket or the corresponding factory bracket.

[0023] In a preferred embodiment of the present invention, the middle corbel has an I-shaped cross-section, and a first protruding plate is provided on the side of the lower flange plate of the lower chord directly opposite the middle corbel; the upper flange plate of the middle corbel and the first protruding plate, as well as the upper flange plate of the middle corbel and the lower flange plate of the crane beam are fixed by welding, or connected by high-strength bolts, or by a mixed connection of high-strength bolts and welding.

[0024] In a preferred embodiment of the present invention, each crane beam is connected to an upper connecting plate and multiple lower connecting plates, and multiple second protrusion plates are arranged at intervals along the length direction of the side edge of the lower flange plate of the lower chord, and each second protrusion plate is connected to the lower flange plate of the corresponding crane beam through the corresponding lower connecting plate.

[0025] In a preferred embodiment of the present invention, the upper connecting plate and the upper flange plate of the crane beam, the upper connecting plate and the upper flange plate of the lower chord, the lower connecting plate and the lower flange plate of the crane beam, and the lower connecting plate and the corresponding second protruding plate are fixed by welding, or connected by high-strength bolts, or by a mixed connection of high-strength bolts and welding.

[0026] In a preferred embodiment of the present invention, the thickness of the upper flange plate of the lower chord, the thickness of the lower flange plate of the lower chord, the thickness of the second protruding plate, the thickness of the upper flange plate of the crane beam, and the thickness of the lower flange plate of the crane beam are all equal and greater than the thickness of the upper connecting plate and the thickness of the lower connecting plate.

[0027] As described above, the crane truss structure combining the load-bearing truss and the crane beam of the present invention adopts a structural design of the combination of the load-bearing truss and the crane beam. The upper chord and the web assembly in the load-bearing truss are both located above the rail surface. The entire load-bearing truss can achieve the requirement of a large span, and the upper chord and the web assembly both occupy the space above the rail surface. Only the lower chord, the middle bracket and the crane beam are located below the rail surface. 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 is not limited by the clearance below the crane rail surface, and the truss structure height 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.

[0028] At the same time, the lower chord adopts a box-type cross-section, which makes the structure more stable and has a stronger load-bearing capacity. The lower chord of the present application, the web assembly and the upper chord together constitute a complete force-bearing system. The crane beams on both sides of the lower chord are only auxiliary structures and basically do not participate in the force-bearing of the truss. The cancellation of the crane beams on both sides does not affect the force-bearing performance of the main structure, and the arrangement of the crane beams can be more flexible. Moreover, the structural system integrates the roof bracket and the upper column support, which can replace part of the roof bracket and part of the upper column support of the factory building. The overall system has good force-bearing performance. The entire crane truss structure is simple in structure, has clear force, and saves steel. In addition, the upper chord, diagonal web, vertical web, lower chord, crane beam, upper connecting plate, lower connecting plate and middle bracket can be manufactured in a separate modular manner, which is more convenient for processing, transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] in:

[0031] Figure 1 This is a structural schematic diagram of a crane truss structure combining a load-bearing truss and a crane beam provided by the present invention.

[0032] Figure 2 for Figure 1 Section view at AA.

[0033] Figure 3 for Figure 1 In the cross-section of BB.

[0034] Figure 4 for Figure 1 A cross-sectional view of the CC.

[0035] Figure 5 for Figure 1 In the cross-section of DD.

[0036] Figure 6 This is a schematic diagram of a crane truss structure provided by the present invention that combines a load-bearing truss with a crane beam and is arranged with three sections.

[0037] Figure 7 Another schematic diagram of the crane truss structure provided by the present invention in which the load-bearing truss and the crane beam are combined and arranged with three sections.

[0038] Figure 8 A schematic diagram of a crane truss structure provided by the present invention in which a load-bearing truss and a crane beam are combined and arranged with 5 sections.

[0039] Figure 9Another schematic diagram of the crane truss structure provided by the present invention in which the load-bearing truss and the crane beam are combined and arranged with 5 sections.

[0040] Figure 10 The cross-sectional view of the upper chord provided by the present invention adopts an H-shaped cross-section.

[0041] Figure 11 A cross-sectional view of the upper chord provided by the present invention adopts a box-shaped cross-section.

[0042] Figure 12 Another cross-sectional view of the upper chord provided by the present invention adopting a box-shaped cross-section.

[0043] Figure 13 for Figure 1 A magnified view of the part at point X.

[0044] Figure 14 for Figure 13 In the cross-section of EE.

[0045] Figure 15 for Figure 13 Cross-section of FF.

[0046] Figure 16 for Figure 14 In the cross-section of GG.

[0047] Figure 17 for Figure 1 A partial enlarged view at Y.

[0048] Figure 18 for Figure 17 In the cross-sectional view of HH.

[0049] Figure 19 for Figure 17 In the cross-sectional view of II.

[0050] Figure 20 for Figure 18 In the cross-section of JJ.

[0051] Figure 21 for Figure 1 A magnified view of the part at Z.

[0052] Figure 22 for Figure 21 Cross-section view in KK.

[0053] Figure 23 for Figure 21 Sectional view in LL.

[0054] Figure 24 for Figure 22 In the cross-sectional view of MM.

[0055] 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 combined node structure using high-strength bolts.

[0056] Figure 26 for Figure 25 Sectional view of NN.

[0057] Figure 27 for Figure 25 Cross-section of PP.

[0058] Figure 28 The crane beam provided by the present invention is a schematic diagram of a single-span crane beam arranged in a single span.

[0059] Description of Figure Numbers:

[0060] 1. Upper chord; 11. Middle chord; 12. Connecting rod;

[0061] 21. Diagonal brace; 22. Vertical brace;

[0062] 3. Lower chord; 31. First convex plate; 32. Second convex plate;

[0063] 4. Crane beam; 41. Crane rail; 42. Single-span crane beam;

[0064] 5. Middle corbel; 51. Reinforcement plate;

[0065] 61. Upper connecting plate; 62. Lower connecting plate;

[0066] 71. Combined node structure; 72. End node structure; 73. Single node structure;

[0067] 74. Combined gusset plate; 75. Vertical gusset plate; 76. Vertical gusset plate; 77. Web plate of vertical gusset plate; 78. Web plate of gusset plate;

[0068] 81. Web splice plate; 82. Outer flange splice plate; 83. Inner flange splice plate;

[0069] 9. Stiffening plate;

[0070] 100. Roof beams;

[0071] 200, plant column; 201, plant upper column; 202, plant lower column; 203, plant corbel;

[0072] H1, ground position; H2, track surface elevation; H3, roof elevation. DETAILED DESCRIPTION

[0073] 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.

[0074] like Figures 1 to 28 As shown, the present application provides a crane truss structure combining a load-bearing truss and a crane beam, comprising a lower chord 3, a web assembly and an upper chord 1 sequentially connected from bottom to top, wherein the lower chord 3 is a box-type section; two crane beams 4 are arranged in parallel and symmetrically on both sides of the lower chord 3, wherein the crane beam 4 is an I-type section, and the top surface of the upper flange plate of the crane beam 4 is used for installing a crane rail 41.

[0075] A plurality of intermediate corbels 5 are connected at intervals along the length direction of the bottom of the lower chord 3, the lower flange plate of the crane beam 4 is connected to the intermediate corbels 5, and the two ends of the crane beam 4 and the two ends of the lower chord 3 are used to connect the corresponding factory corbels 203; an upper connecting plate 61 is connected between the upper flange plate of the crane beam 4 and the upper flange plate of the lower chord 3, and a lower connecting plate 62 is connected between the lower flange plate of the crane beam 4 and the lower flange plate of the lower chord 3; the web assembly includes a plurality of diagonal webs 21 and a plurality of vertical webs 22 connected between the upper chord 1 and the lower chord 3; the connection node between the upper chord 1 and the web assembly is used to connect the corresponding roof beam 100; or the connection node between the upper chord 1 and the web assembly is used to connect the upper chord of the roof truss, and at least a part of the vertical webs 22 are used to connect the lower chord of the roof truss.

[0076] The entire crane truss structure is divided into two major parts: the load-bearing truss and the crane beam 4. The load-bearing truss includes an upper chord 1, a web assembly, a lower chord 3, an intermediate corbel 5, an upper connecting plate 61, and a lower connecting plate 62. The upper chord 1 and the lower chord 3 are connected by the web assembly, and the three components together constitute the load-bearing truss body. The length direction of the upper chord 1 is parallel to the length direction of the lower chord 3, and the upper chord 1 is located directly above the lower chord 3. The length direction of the crane beam 4 is parallel to the length direction of the lower chord 3. The web of the lower chord 3 and the web of the crane beam 4 are parallel to each other and are both arranged vertically. The upper connecting plate 61 and the lower connecting plate 62 are both horizontal plates. The length direction of the vertical web 22 is vertical, and the length direction of the diagonal web 21 is inclined. The lower chord 3 adopts a box-type cross-section, and two rows of crane beams 4 are arranged on both sides of the lower chord 3. The upper flange plates of the crane beams 4 and the upper flange plates of the lower chord 3 are connected by upper connecting plates 61, and the lower flange plates of the crane beams 4 and the lower flange plates of the lower chord 3 are connected by lower connecting plates 62.

[0077] The crane truss structure is used to be installed between two factory columns 200. The factory columns 200 include an upper factory column 201 and a lower factory column 202. The upper factory column 201 and the lower factory column 202 are connected (e.g., welded) by a factory corbel 203. Generally, the upper factory column 201 adopts an I-shaped cross-section, and the lower factory column 202 can adopt a round steel pipe or an I-shaped cross-section. The two ends of the crane beam 4 are supported on and connected to the two factory corbels 203. The two ends of the lower chord 3 are supported on and connected to the two factory corbels 203. The middle part of the crane beam 4 and the middle part of the lower chord 3 are supported on and connected to the middle corbel 5. The crane beam 4 serves as a crane track support, supporting the crane's longitudinal movement. The intersection of the upper chord 1 and the web of the load-bearing truss is used to connect to the roof beam 100 (or to connect to the upper chord of the roof truss), which can bear the roof load transmitted by the roof beam 100 (or roof truss). The roof beam 100 (or roof truss) can serve as lateral support for the upper chord 1. When the upper chord 1 is connected to the upper chord of the roof truss, the lower chord of the roof truss can be connected to the vertical web 22. 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 (or roof truss). In order to maintain 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 rod 1 is used to connect the roof beam 100 or the upper chord of the roof truss, and the vertical web rod 22 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 rod assembly can replace part of the upper column support of the factory building.

[0078] The entire lower chord 3 adopts a box-shaped cross-section, which is inherently stable. The lower chord 3 can simultaneously bear the roof load and the crane load, mainly bearing the truss force. In the entire structure, the crane beam 4 and the load-bearing truss are basically separated in terms of force. The crane beam 4 only bears the crane load and hardly participates in the truss force. The removal of the crane beam 4 has little impact on the load-bearing capacity of the load-bearing truss. The load-bearing truss itself includes a complete upper chord, web, and lower chord, forming a complete self-stabilizing structure. The crane beam 4 is supported at the middle bracket 5 of the lower chord 3. The crane beam 4 does not need to be a continuous crane beam, which increases the flexibility of the crane beam 4 arrangement.

[0079] In terms of force, the roof load transmitted by the roof beam 100 or the roof truss is transmitted to the load-bearing truss body composed of the upper chord 1, the web assembly and the lower chord 3 through the various node structures on the upper chord 1, and then transmitted to the ground through the factory corbels 203 and the factory lower columns 202 at both ends; at the same time, the crane load transmitted by the crane is transmitted to the middle corbels 5 through the crane beam 4, and then transmitted to the load-bearing truss body composed of the upper chord 1, the web assembly and the lower chord 3, and then transmitted to the ground through the factory corbels 203 and the factory lower columns 202 at both ends, and the force is clear.

[0080] Therefore, the crane truss structure of the present application adopts a structural design of a combination of a load-bearing truss and a crane beam 4. The upper chord 1 and the web assembly in the load-bearing truss are both located above the rail surface. The entire load-bearing truss can achieve large span requirements, and the upper chord 1 and the web assembly both occupy the space above the rail surface. Only the lower chord 3, the middle bracket 5 and the crane beam 4 are located below the rail surface. The entire crane truss structure occupies less space below the crane rail surface, fully meeting the process layout requirements; the height of the entire crane truss structure is not subject to the clearance limit of the lower part of the crane rail surface, and the truss structure height 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.

[0081] At the same time, the lower chord 3 adopts a box-shaped cross-section, which makes the structure more stable and has a stronger load-bearing capacity. The lower chord 3 of the present application, the web assembly and the upper chord 1 together constitute a complete force-bearing system. The crane beams 4 on both sides of the lower chord 3 are merely auxiliary structures and basically do not participate in the force-bearing of the truss. The cancellation of the crane beams 4 on both sides does not affect the force-bearing performance of the main structure, and the arrangement of the crane beams 4 can be more flexible. Moreover, this structural system integrates the roof bracket and the upper column support, which can replace part of the roof bracket and part of the upper column support of the factory building, and the overall system has good force-bearing performance. The entire crane truss structure is simple in structure, has clear force, and saves steel. In addition, the upper chord 1, the diagonal web 21, the vertical web 22, the lower chord 3, the crane beam 4, the upper connecting plate 61, the lower connecting plate 62 and the middle bracket 5 can be manufactured in a separate modular manner, which is more convenient for processing, transportation and installation.

[0082] 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.

[0083] Optional, see Figure 1 The upper chord 1 includes an intermediate chord 11 and two connecting rods 12. The first end of the connecting rod 12 is connected to the corresponding end of the intermediate chord 11, and the second end of the connecting rod 12 is used to connect to the corresponding factory upper column 201, and the cross-sectional area of ​​the connecting rod 12 is smaller than the cross-sectional area of ​​the intermediate chord 11.

[0084] The length of the middle chord 11 is shorter than that of the lower chord 3, and the entire upper chord 1 is approximately the same length as the lower chord 3. The two ends of each connecting rod 12 connect the corresponding end of the middle chord 11 to the corresponding upper column 201 of the factory building. The upper ends of the aforementioned diagonal web members 21 and vertical web members 22 are both connected to the middle chord 11. Since the upper chord end section is generally a non-loaded component, the entire upper chord 1 is composed of middle chords 11 and two connecting rods 12 with different cross-sectional areas, forming a variable cross-section structure and avoiding material waste.

[0085] Furthermore, in order to facilitate the connection of each web member with the upper chord 1 and the lower chord 3, multiple node structures are provided on the upper chord 1 and the lower chord 3, and the two ends of the diagonal web member 21 are respectively connected to the corresponding node plates on the upper chord 1 and the corresponding node plates on the lower chord 3, and the two ends of the vertical web member 22 are respectively connected to the corresponding node plates on the upper chord 1 and the corresponding node plates on the lower chord 3.

[0086] 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 21 and the corresponding node structure, as well as between the two ends of the vertical web member 22 and the corresponding node structure.

[0087] In actual applications, the number of vertical web members 22 is the same as the number of middle corbels 5, and multiple vertical web members 22 are respectively arranged directly above the multiple middle corbels 5, that is, each middle corbel 5 is arranged at the bottom of the intersection of the lower chord 3 and each vertical web member 22. Generally, a diagonal web member 21 is provided between two adjacent vertical web members 22, or two diagonal web members 21 arranged crosswise are provided between two adjacent vertical web members 22, and a diagonal web member 21 is provided between the two vertical web members 22 near the two ends of the lower chord 3 and the corresponding ends of the lower chord 3, and the lower end of the diagonal web member 21 is connected to the node structure at the end of the lower chord 3. The ends of a part of the vertical web members 22 are connected to the same node structure as the ends of two adjacent diagonal web members 21, and / or the ends of a part of the vertical web members 22 are connected to the same node structure as the end of one of the adjacent diagonal web members 21. There are also some vertical web members 22 that are connected to a node structure alone. The specific connection arrangement can be determined according to actual conditions.

[0088] Generally, stiffening plates 9 are provided in the box section of the lower chord 3 and on both sides of the web of the crane beam 4 at positions corresponding to the factory corbels 203 and the middle corbels 5 to improve the structural strength and bearing capacity.

[0089] The number of sections of the entire crane truss structure is not limited to 4, and can also be designed as 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 6 to 9 shown.

[0090] The upper chord 1 is an I-shaped section, an H-shaped section, a box section or other reasonable sections. The upper chord 1, the diagonal web members 21 and the vertical web members 22 can be H-shaped sections, box sections or other reasonable sections. The cross-sectional shapes of the upper chord 1, the multiple diagonal web members 21 and the multiple vertical web members 22 can all be the same or partially the same. The specific cross-sectional shapes can be determined according to actual needs. For example, when the upper chord 1 adopts a solid I-shaped section or an H-shaped section, refer to Figure 2 The web of the upper chord 1 is arranged horizontally, and the flange plates on both sides of the upper chord 1 can be used to connect the roof beam 100 or the upper chord of the roof truss. When the vertical web 22 adopts an H-shaped cross-section, refer to Figure 2 The web of the vertical web member 22 is vertically arranged and perpendicular to the web of the bottom chord member 3. The flange plates on both sides of the vertical web member 22 are also vertically arranged and can be used to connect the bottom chord of the roof truss. The cross-sectional shape of the upper chord member 1 when it adopts an H-shaped cross-section is as follows: Figure 10 As shown, the cross-sectional shape when using a box section can be as follows Figure 11 or Figure 12 shown.

[0091] For example, in some embodiments, the diagonal web members 21 and the vertical web members 22 are H-sections and include two flange plates and one web plate; or, the diagonal web members 21 and the vertical web members 22 are box-sections and include two flange plates and two web plates. Figure 11 or Figure 12 The shapes shown are the same.

[0092] For the embodiment in which the diagonal web members 21 and the vertical web members 22 adopt an H-section or a box-section, the node connections between the diagonal web members 21 and the vertical web members 22 and the upper chord 1 and the lower chord 3 can be arranged as follows:

[0093] Reference Figure 1 as well as Figures 21 to 24 At least one combined node structure 71 is provided on the lower chord 3 , and each combined node structure 71 is connected to a corresponding vertical web member 22 and a corresponding at least one diagonal web member 21 .

[0094] Each combined node structure 71 includes two combined node plates 74 arranged in parallel and spaced apart, and the two combined node plates 74 are formed by extending upward from the two webs of the lower chord 3; each combined node plate 74 includes a connected straight node vertical plate 75 and at least one inclined node vertical plate 76 (the various parts of the combined node plate 74 are generally formed as one piece), and a straight node web 77 is connected between the two oppositely arranged straight node vertical plates 75 in each combined node structure 71, and an inclined node web 78 is connected between the two oppositely arranged inclined node vertical plates 76 in each combined node structure 71; the two flange plates of the vertical web member 22 are respectively connected to the two oppositely arranged straight node vertical plates 75 in the corresponding combined node structure 71, and the web of the vertical web member 22 is connected to the corresponding straight node web 77; the two flange plates of the diagonal web member 21 are respectively connected to the two oppositely arranged inclined node vertical plates 76 in the corresponding combined node structure 71, and the web of the diagonal web member 21 is connected to the corresponding inclined node web 78.

[0095] Reference Figure 1 as well as Figures 13 to 16 As shown, two end node structures 72 are provided at both ends of the lower chord 3, and each end node structure 72 is connected to a corresponding diagonal web member 21; each end node structure 72 includes two diagonal node vertical plates 76 arranged in parallel and spaced apart, and the two diagonal node vertical plates 76 extend upward from the two webs of the lower chord 3, and an diagonal node web plate 78 is connected between the two diagonal node vertical plates 76; the two flange plates of the diagonal web member 21 are respectively connected to the two oppositely arranged diagonal node vertical plates 76 in the corresponding end node structure 72, and the web of the diagonal web member 21 is connected to the corresponding diagonal node web plate 78.

[0096] Reference Figure 1 as well as Figures 17 to 20 As shown, at least one single-node structure 73 is provided on the lower chord 3, and each single-node structure 73 is connected to a corresponding vertical web member 22; each single-node structure 73 includes two straight node vertical plates 75 arranged in parallel and spaced apart, and the two straight node vertical plates 75 extend upward from the two webs of the lower chord 3, and a straight node web 77 is connected between the two straight node vertical plates 75; the two flange plates of the vertical web member 22 are respectively connected to the two oppositely arranged straight node vertical plates 75 in the corresponding single-node structure 73, and the web of the vertical web member 22 is connected to the corresponding straight node web 77.

[0097] In this embodiment, according to the different number of spans of the entire crane truss structure and the different arrangement and connection methods of the diagonal web members 21, the number of combined node structures 71 and single node structures 73 connected to the lower chord 3 is also different, but generally two end node structures 72 are set at both ends of the lower chord 3, and at least one combined node structure 71 is set between the two ends of the lower chord 3. The combined node structure 71 connects the lower end of a vertical web member 22 and the lower end of a diagonal web member 21, or the combined node structure 71 connects the lower end of a vertical web member 22 and the lower ends of two diagonal web members 21 located on both sides of the vertical web member 22; there may be no single node structure 73 on the lower chord 3, or at least one single node structure 73 may be set, and the specific arrangement depends on actual needs.

[0098] Different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding hybrid connection can be used between the flange plates of the vertical web members 22 and the corresponding straight node vertical plates 75, between the web plates of the vertical web members 22 and the corresponding straight node web plates 77, between the flange plates of the diagonal web members 21 and the corresponding diagonal node vertical plates 76, and between the web plates of the diagonal web members 21 and the corresponding diagonal node web plates 78 in the combined node structure 71; between the flange plates of the diagonal web members 21 and the corresponding diagonal node vertical plates 76, and between the web plates of the diagonal web members 21 and the corresponding diagonal node web plates 78 in the end node structure 72; and between the flange plates of the vertical web members 22 and the corresponding straight node vertical plates 75, and between the web plates of the vertical web members 22 and the corresponding straight node web plates 77 in the single node structure 73. The specific connection method depends on the actual needs, for example Figures 13 to 24 The places shown in FIG. 1 are all connected by welding.

[0099] For example, Figures 25 to 27 In the combined node structure 71 shown in FIG, friction-type high-strength bolts are used to connect these locations. Specifically, taking the connection between the combined node structure 71 and the vertical web member 22 as an example, two web splicing plates 81 are provided on both sides of the web of the vertical web member 22, and outer flange splicing plates 82 and inner flange splicing plates 83 are provided on the outer and inner sides of the flange plate of the vertical web member 22. The upper and lower parts of the web splicing plates 81 respectively cover the web of the vertical web member 22 and the straight node web 77, and the upper and lower parts of the outer flange splicing plates 82 respectively cover the flange of the vertical web member 22. The outer surface of the plate and the outer surface of the straight node vertical plate 75, the upper and lower parts of the inner flange splicing plate 83 respectively cover the inner surface of the flange plate of the vertical web member 22 and the inner surface of the straight node vertical plate 75; the two web splicing plates 81 and the web of the vertical web member 22, the two web splicing plates 81 and the straight node web plate 77, the outer flange splicing plate 82 and the flange plate of the vertical web member 22 and the inner flange splicing plate 83, and the outer flange splicing plate 82 and the straight node vertical plate 75 and the inner flange splicing plate 83 are all connected by friction-type high-strength bolts.

[0100] At the connection nodes between the lower chord 3 and the diagonal web members 21 and the vertical web members 22, the vertical plates of each node are formed by extending the web of the lower chord 3 upwards and are integrally formed with the web of the lower chord 3 during processing, which can reduce the number of welds at the node connection, increase the load-bearing capacity, and increase the fatigue strength. In addition, at the end node structure 72, stiffening plates 9 (such as Figures 13 to 16 At the single node structure 73, stiffening plates 9 are provided in the box section of the lower chord 3 and on both sides of the web of the crane beam 4 facing the web of the middle corbel 5 (as shown); Figures 17 to 20 At the combined node structure 71, stiffening plates 9 are provided in the box section of the lower chord 3 and on both sides of the web of the crane beam 4 facing the web of the middle corbel 5 (as shown); Figures 21 to 24 The plate surface of each stiffening plate 9 is perpendicular to the length direction of the lower chord 3; the arrangement of each stiffening plate 9 can further improve the stability and bearing capacity of the node connection.

[0101] As for the node connection mode between the upper chord 1 and the diagonal web members 21 and the vertical web members 22, any existing structure may be adopted.

[0102] The ground position H1, track elevation H2 and roof elevation H3 are as follows: Figure 1 As shown, since the load-bearing trusses in the entire crane truss structure mainly occupy the space above the crane rail surface, the space occupied below the crane rail surface can be smaller. Generally, the height between the top surface of the crane beam 4 and the bottom surface of the middle corbel 5 is 2m-2.5m, which can meet various requirements such as force and installation.

[0103] As required, each crane beam 4 is a multi-span continuous beam (such as Figure 1 or each crane beam 4 includes multiple single-span crane beams 42 (as shown); Figure 28 As shown, the ends of each single-span crane beam 42 are connected to the corresponding intermediate corbel 5 or the corresponding factory building corbel 203. In other words, the crane beam 4 can be designed as a multi-span continuous beam or a single-span crane beam. The multi-span continuous beam design offers better integrity, while the single-span crane beam design is easier to transport and assemble.

[0104] The length direction of the middle corbel 5 is perpendicular to the length direction of the lower chord 3. Generally, the middle corbel 5 adopts an I-shaped cross section, and the web of the middle corbel 5 is vertically arranged and perpendicular to the web of the lower chord 3. Figure 19 and Figure 23As shown, a first protruding plate 31 is provided on the side of the lower flange plate of the lower chord 3, facing the middle corbel 5; different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding mixed connection can be adopted between the upper flange plate of the middle corbel 5 and the first protruding plate 31, and between the upper flange plate of the middle corbel 5 and the lower flange plate of the crane beam 4.

[0105] Optional, see Figure 2 Reinforcement plates 51 are provided on both sides of the web of the middle corbel 5 facing the two webs of the lower chord 3. The plate surface of the reinforcement plate 51 is parallel to the corresponding web of the lower chord 3 and is located directly below the web to improve the structural strength.

[0106] Furthermore, each crane beam 4 is connected to an upper connecting plate 61 and multiple lower connecting plates 62, referring to Figure 15 、 Figure 19 and Figure 23 As shown, a plurality of second protruding plates 32 are provided at intervals along the length direction of the side edge of the lower flange plate of the lower chord 3 , and each second protruding plate 32 is connected to the lower flange plate of the corresponding crane beam 4 through a corresponding lower connecting plate 62 .

[0107] A single-piece upper connecting plate 61 is connected between the upper flange of the lower chord 3 and the corresponding upper flange of the crane beam 4, enhancing overall integrity. Each second protrusion plate 32 is located between two adjacent intermediate corbels 5, or between the plant corbel 203 and an intermediate corbel 5. A first protrusion plate 31 is provided on the same side of the lower chord 3, corresponding to each intermediate corbel 5. At least one second protrusion plate 32 can be provided on the same side of the lower chord 3, between two adjacent intermediate corbels 5, or between the plant corbel 203 and an intermediate corbel 5. The specific number of second protrusion plates 32 can be determined based on actual load requirements.

[0108] Typically, the first and second protruding plates 31, 32 are rectangular plates with a relatively small area. The width of the lower flange of the lower chord 3 is smaller than the width of the upper flange. The width of the lower flange plus the width of the two second protruding plates 32 on either side is substantially equal to the width of the upper flange. There is a gap between the second protruding plates 32 and the lower flange of the crane beam 4, as well as between the upper flange of the lower chord 3 and the upper flange of the crane beam 4. A single lower connecting plate 62 is also a rectangular plate with a relatively small area. The spacing between adjacent lower connecting plates 62 can be determined as needed. For example, if a lower connecting plate 62 is spaced 3 meters apart along the length of the crane beam 4, the spacing between adjacent lower connecting plates 62 is 3 meters.

[0109] Since the lower chord 3 adopts a box-type cross-section, after the lower chord 3 is connected to the crane beam 4 using a whole upper connecting plate 61, the overall structure formed by the lower chord 3 and the two crane beams 4 is relatively stable. Therefore, the lower flange width of the lower chord 3 can be made smaller than the upper flange width. By providing a plurality of small second protrusions 32 on the lower flange plate of the lower chord 3 and connecting it to the crane beam 4 through the small lower connecting plate 62, and providing a plurality of small first protrusions 31 on the lower flange plate of the lower chord 3 to connect the middle corbel 5, the integrity of the structure can be ensured and the amount of steel used can be reduced.

[0110] Different connection methods such as welding, high-strength bolt connection, high-strength bolt connection and welding mixed connection can be used between the upper connecting plate 61 and the upper flange plate of the crane beam 4, between the upper connecting plate 61 and the upper flange plate of the lower chord 3, between the lower connecting plate 62 and the lower flange plate of the crane beam 4, and between the lower connecting plate 62 and the corresponding second protruding plate 32.

[0111] Optionally, the thickness of the upper flange plate of the lower chord 3, the thickness of the lower flange plate of the lower chord 3, the thickness of the second protruding plate 32, the thickness of the upper flange plate of the crane beam 4, and the thickness of the lower flange plate of the crane beam 4 are all equal and greater than the thickness of the upper connecting plate 61 and the thickness of the lower connecting plate 62.

[0112] The upper connecting plate 61 and the lower connecting plate 62 are generally made of thin steel plates, and their thickness is roughly half the thickness of the upper flange plate of the lower chord 3. Generally, the thickness of the upper flange plate of the lower chord 3 is 20mm-30mm, and the thickness of the upper connecting plate 61 and the lower connecting plate 62 is 10mm-15mm.

[0113] From the perspective of force, the flange plate near the web connection contributes more to the strength of the component, while the upper connecting plate 61 and the lower connecting plate 62 located between the crane beam 4 and the lower chord 3 contribute less to the strength of the component. Therefore, both the upper connecting plate 61 and the lower connecting plate 62 are made of thin plates, which can reduce the amount of steel used and reduce material waste.

[0114] In summary, the crane truss structure of this embodiment is an ultra-long-span crane truss structure. The load-bearing truss supports the crane beam 4 via the intermediate corbel 5 at the bottom of the bottom chord 3. The upper chord 1 supports the roof beam 100 or roof truss. The intermediate corbel 5 is provided at the bottom of the load-bearing truss, and the crane beams 4, which are parallel to each other on both sides, are supported by the intermediate corbel 5. The upper flange plate of the bottom chord 3 of the load-bearing truss is connected to the upper flange plate of the crane beam 4 via a thin steel plate, and the lower flange plate of the bottom chord 3 of the load-bearing truss is connected to the lower flange plate of the crane beam 4 via a thin steel plate. The web members and chord members of the load-bearing truss are connected by welding or high-strength bolts, enabling modular manufacturing and installation.

[0115] The entire structure is suitable for crane girders with extremely large spans after column removal in industrial plants. This system integrates roof brackets, upper column supports, and a crane girder system. It boasts simple construction, clear force distribution, a large span, reduced steel usage, a simple and aesthetically pleasing appearance, and internal space for process pipelines. Analysis and comparison have shown that compared to existing solid-web crane girders, it 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 bolts are used for connection. It also addresses the issue of crane truss spans typically not exceeding 36 meters, and the problem of 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.

[0116] 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 combining a load-bearing truss and a crane beam, characterized in that: The crane comprises a lower chord, a web assembly, and an upper chord connected sequentially from bottom to top, wherein the lower chord is a box-shaped section; two crane beams are symmetrically arranged on both sides of the lower chord, and the crane beams are I-shaped sections. The top surface of the upper flange plate of the crane beam is used to install the crane rail; A plurality of intermediate corbels are connected at intervals along the length direction of the bottom of the lower chord, the lower flange plate of the crane beam is connected to the intermediate corbels, and the two ends of the crane beam and the two ends of the lower chord are used to connect corresponding factory corbels; an upper connecting plate is connected between the upper flange plate of the crane beam and the upper flange plate of the lower chord, and a lower connecting plate is connected between the lower flange plate of the crane beam and the lower flange plate of the lower chord; the web member assembly includes a plurality of diagonal web members and a plurality of vertical web members connected between the upper chord and the lower chord; the connection node between the upper chord and the web member assembly is used to connect corresponding roof beams; or the connection node between the upper chord and the web member assembly is used to connect the upper chord of the roof truss, and at least a part of the vertical web members are used to connect the lower chord of the roof truss.

2. The crane truss structure combining a load-bearing truss and a crane beam according to claim 1, characterized in that: The upper chord 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.

3. The crane truss structure combining a load-bearing truss and a crane beam according to claim 1, characterized in that: A plurality of node structures are provided on both the upper chord and the lower chord, and the two ends of the diagonal web members and the corresponding node structures, as well as the two ends of the vertical web members and the corresponding node structures, are fixed by welding, connected by high-strength bolts, or connected by a combination of high-strength bolts and welding.

4. The crane truss structure combining a load-bearing truss and a crane beam according to claim 3, 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.

5. The crane truss structure combining a load-bearing truss and a crane beam according to claim 1, characterized in that: Stiffening plates are provided in the box section of the lower chord and on both sides of the web of the crane beam at positions corresponding to the factory building corbels and the middle corbels.

6. The crane truss structure combining a load-bearing truss and a crane beam according to claim 1, characterized in that: The diagonal web members and the vertical web members are H-shaped cross-sections or box-shaped cross-sections, and each of the diagonal web members and the vertical web members includes two flange plates and one or two web plates.

7. The crane truss structure combining a load-bearing truss and a crane beam according to claim 6, characterized in that: At least one combined node structure is provided on the lower chord, and each of the combined node structures is connected to a corresponding vertical web member and a corresponding diagonal web member; Each of the combined node structures comprises two combined node plates arranged in parallel and spaced apart, the two combined node plates extending upward from the two webs of the bottom chord; each of the combined node plates comprises a straight node riser and at least one oblique node riser connected to each other, a straight node web being connected between the two oppositely arranged straight node risers in each combined node structure, and an oblique node web being connected between the two oppositely arranged oblique node risers in each combined node structure; The two flange plates of the vertical web members are respectively connected to the two oppositely arranged straight node vertical plates in the corresponding combined node structure, and the web of the vertical web members is connected to the corresponding straight node web plates; the two flange plates of the diagonal web members are respectively connected to the two oppositely arranged oblique node vertical plates in the corresponding combined node structure, and the web of the diagonal web members is connected to the corresponding oblique node web plates.

8. The crane truss structure combining a load-bearing truss and a crane beam according to claim 6, characterized in that: Two end node structures are provided at both ends of the lower chord, and each of the end node structures is connected to a corresponding diagonal web member; each of the end node structures includes two diagonal node vertical plates arranged in parallel and at intervals, and the two diagonal node vertical plates are formed by extending upward from the two web plates of the lower chord, and an diagonal node web plate is connected between the two diagonal node vertical plates; the two flange plates of the diagonal web member are respectively connected to the two oppositely arranged diagonal node vertical plates in the corresponding end node structure, and the web plate of the diagonal web member is connected to the corresponding diagonal node web plate.

9. The crane truss structure combining a load-bearing truss and a crane beam according to claim 6, characterized in that: At least one single-node structure is provided on the lower chord, each of the single-node structures being connected to a corresponding one of the vertical web members; each of the single-node structures comprises two straight node risers arranged in parallel and spaced apart, the two straight node risers extending upward from the two web members of the lower chord, and a straight node web member being connected between the two straight node risers; The two flange plates of the vertical web members are respectively connected to two oppositely arranged straight node vertical plates in the corresponding single-node structure, and the web plates of the vertical web members are connected to the corresponding straight node web plates.

10. The crane truss structure combining a load-bearing truss and a crane beam according to claim 1, characterized in that: The height between the top surface of the crane beam and the bottom surface of the middle corbel is 2m-2.5m.

11. The crane truss structure combining a load-bearing truss and a crane beam according to claim 1, characterized in that: Each of the crane beams is a multi-span continuous beam; or each of the crane beams includes a plurality of single-span crane beams, and the end of each of the single-span crane beams is connected to the corresponding middle corbel or the corresponding factory building corbel.

12. The crane truss structure combining a load-bearing truss and a crane beam according to claim 1, wherein: The middle corbel has an I-shaped cross-section, and a first convex plate is provided on the side of the lower flange plate of the lower chord, facing the middle corbel; the upper flange plate of the middle corbel and the first convex plate, as well as the upper flange plate of the middle corbel and the lower flange plate of the crane beam are fixed by welding, connected by high-strength bolts, or connected by a combination of high-strength bolts and welding.

13. The crane truss structure combining a load-bearing truss and a crane beam according to claim 1, wherein: Each of the crane beams is connected to an upper connecting plate and multiple lower connecting plates. Multiple second protruding plates are arranged at intervals along the length direction of the side edge of the lower flange plate of the lower chord. Each of the second protruding plates is connected to the lower flange plate of the corresponding crane beam through the corresponding lower connecting plate.

14. The crane truss structure combining a load-bearing truss and a crane beam according to claim 13, wherein: The upper connecting plate and the upper flange plate of the crane beam, the upper connecting plate and the upper flange plate of the lower chord, the lower connecting plate and the lower flange plate of the crane beam, and the lower connecting plate and the corresponding second convex plate 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 combining a load-bearing truss and a crane beam according to claim 13, wherein: The thickness of the upper flange plate of the lower chord, the thickness of the lower flange plate of the lower chord, the thickness of the second protruding plate, the thickness of the upper flange plate of the crane beam, and the thickness of the lower flange plate of the crane beam are all equal and greater than the thickness of the upper connecting plate and the thickness of the lower connecting plate.

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