Lattice type combined crane beam

Abstract

The utility model relates to a lattice type combined crane beam which comprises crane beams, the crane beams comprise middle column crane beams and side column crane beams, two rows of middle column crane beams are arranged on the left side and the right side of a middle column and are respectively supported by brackets on the left side and the right side of the middle column, and one row of side column crane beams are arranged on the inner side of the side column and are supported by brackets of the side column; the space trusses at least comprise center pillar crane beam space trusses, the center pillar crane beam space trusses are arranged between the two columns of center pillar crane beams on the left side and the right side of the center pillar at intervals in the longitudinal direction at a preset distance, and the two ends of the center pillar crane beam space trusses are fixedly connected with the two columns of center pillar crane beams respectively; and the middle column crane beam space trusses between the middle column crane beams form a lattice type combined crane beam stress whole. The two crane beams and the space truss between the two crane beams form an integral space structure, so that the two crane beams are jointly stressed and jointly resist external loads, the crane beams mutually provide lateral support through the upper chords of the space truss, out-of-plane instability of the crane beams is avoided, out-of-plane calculation length of the crane beams is reduced, and the crane beams are more stable. And meanwhile, the space truss has enough rigidity, and deformation between crane beams can be coordinated.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a crane beam, and specifically to a lattice-type combined crane beam. Background Art

[0002] In light steel structure industrial plants, crane beams are very important components. They not only control the amount of steel used in the entire light steel plant (accounting for 1 / 4 to 1 / 3 of the total), but also directly affect the safety and reliability of the entire structure. Once the crane beam is damaged, the crane cannot operate, affecting production, or even causing sudden accidents, resulting in casualties and economic losses. Therefore, special attention should be paid to the design of crane beams.

[0003] In actual engineering, in order to reduce the cost of the project and give full play to the high strength of steel, steel beams are often made into thin sections and slender members, which leads to the instability problem of bending members under pressure. When the steel member bending in the plane of maximum principal stiffness has poor stiffness and insufficient lateral support, the member may suffer instability failure before strength failure. When the steel beam is unstable as a whole, because the stiffness and torsional stiffness in the plane of bending moment are much greater than the lateral plane, instability deformation cannot occur in the plane, and the member will undergo lateral bending and torsional deformation. This lateral bending and torsional deformation will cause the bending member to quickly lose its bearing capacity and produce overall bending-torsional buckling. Moreover, this kind of failure is often sudden and without warning, showing the nature of brittle failure. Once buckling occurs, the structure collapses immediately, which is more hidden and dangerous than plastic failure.

[0004] At present, the crane beams used in light steel structure factories generally adopt welded I-shaped sections, without brake structures, and only use the method of strengthening the compressed flange to improve the overall stability of the crane beam, so it is also called non-brake structural steel crane beam.

[0005] Steel crane beams can be divided into simply supported beams, continuous beams and frame beams. Steel crane beams are generally designed as simply supported beams because they have the advantages of clear force transmission, simple structure and convenient construction. Compared with simply supported beams, continuous beams reduce the mid-span deflection and the maximum positive moment in the mid-span, saving steel (saving 10% to 15% compared to simply supported beams). However, because the force transmission of continuous beams is unclear, the design calculation, structure and construction are relatively complicated, and they are sensitive to the settlement of the support and have high requirements for the foundation. They are usually connected with three to five spans, so they are rarely used in China. The frame beam forms a single-span or multi-span continuous rigid frame with crane beams and columns in the longitudinal direction, which has good longitudinal stiffness. However, in view of the complexity of calculation, structure and construction, it is only considered when it is impossible to set column supports on the column row.

[0006] According to the component type, steel crane beams can be divided into two categories: solid-web type (steel beams, I-shaped steel beams, Y-shaped beams, box beams) and hollow-web type (strut beams, crane trusses). Solid-web crane beams have good dynamic performance and are suitable for heavy-duty work systems. Although the production, transportation and installation of steel beams are relatively simple and convenient, they use a lot of steel and are generally used for cranes with light and medium working systems with a span of L≤6m and a lifting capacity of Q≤10t. The I-shaped steel beam is welded or riveted with upper and lower flange plates and webs. It is generally designed to be of equal height and equal cross-section. The beam height at the support can also be reduced or designed to be in the form of variable cross-section as needed. When the crane has a large lifting capacity, the local compression area on the upper part of the web of the I-shaped steel beam can be thickened to save steel, which becomes a Y-shaped beam, but this will increase the inconvenience of construction. The box beam is a closed box-section beam composed of upper and lower flange plates and double webs. It has high rigidity and good torsion resistance. It is suitable for large-span, large-tonnage soft hook cranes or extra-heavy hard hook cranes, as well as welded beams with high torsional rigidity. However, the box beam is relatively complex to manufacture, difficult to weld, and difficult to control and correct welding deformation. The strut beam is a crane truss composed of rails and upper chords. It saves steel, but requires high precision in manufacturing and installation. It is generally used for manual beam cranes with a span of L≤6m and a lifting capacity of Q≤5t. The crane truss is a hollow structure with a combined steel or welded I-shaped rigid upper chord. Although it saves steel (saving 10% to 30% compared to solid-web crane beams), it is time-consuming and labor-intensive to manufacture. The connection nodes are prone to fatigue damage under dynamic loads. It is generally used for light, medium-duty or small-tonnage soft hook heavy-duty cranes with a span of L≥18m and a lifting capacity of Q≤75t.

[0007] In summary, the existing crane beams have the following disadvantages:

[0008] 1) Solid-web crane beam has good dynamic performance and is suitable for heavy-duty work. Although the production, transportation and installation of steel beams are relatively simple and convenient, the crane beam's bearing capacity is controlled by stability. When the span is large, it uses more steel and has poor economy.

[0009] 2) The box beam has high rigidity and good torsional resistance. It is suitable for large-span, large-tonnage soft hook cranes or extra-heavy hard hook cranes, as well as welded beams with high torsional rigidity. However, the box beam is relatively complicated to manufacture, the welding is difficult, and the welding deformation is not easy to control and correct.

[0010] 3) The strut-type beam is a crane truss formed by the combined action of the rails and the upper chord. It saves steel but requires high precision in manufacturing and installation.

[0011] 4) The crane truss is a hollow-web structure with a combined steel or welded I-shaped rigid upper chord. Although it saves steel (saving 10% to 30% compared to a solid-web crane beam), it is time-consuming and labor-intensive to manufacture, and the connection nodes are prone to fatigue damage under dynamic loads.

[0012] Therefore, it is necessary to improve the existing crane beam structure to meet the needs of actual engineering use. Summary of the invention

[0013] In view of the deficiencies in the prior art, the utility model provides a lattice-type combined crane beam, which has significant improvements in stiffness, deformation and overall stability, and can be widely used in various industrial and civil buildings that require cranes.

[0014] The technical solution of the utility model is as follows:

[0015] A lattice-type combined crane beam, the lattice-type combined crane beam comprising:

[0016] A crane beam, wherein the crane beam comprises a center column crane beam and a side column crane beam, wherein two rows of the center column crane beams are arranged on the left and right sides of the center column and are supported by the corbels on the left and right sides of the center column respectively, and one row of the side column crane beams is arranged on the inner side of the side column and is supported by the corbels of the side column;

[0017] A space truss, wherein the space truss at least comprises a center column crane beam space truss, wherein the center column crane beam space truss is arranged longitudinally at a predetermined interval between two rows of center column crane beams on the left and right sides of the center column, and the two ends of the space truss are respectively connected and fixed to the two rows of center column crane beams; and

[0018] The middle column crane beam space trusses between the middle column crane beams form a lattice-type combined crane beam force-bearing entity.

[0019] In some embodiments, the space truss further comprises:

[0020] A side column crane beam space truss is arranged between the side column crane beam and the side column at a predetermined position close to the side column, and its two ends are respectively connected and fixed to the side column crane beam and the side column, so that the side column crane beam and the side column crane beam space truss form a lattice-type combined crane beam force-bearing whole.

[0021] In some embodiments, the crane beam is composed of an H-shaped steel or an I-shaped steel welded with a plurality of stiffening connecting plates, the plurality of stiffening connecting plates are arranged at intervals along the longitudinal direction of the H-shaped steel or the I-shaped steel, the top and sides of the stiffening connecting plates are welded to the upper flange and web of the H-shaped steel or the I-shaped steel, and a certain distance is left between the bottom of the stiffening connecting plates and the lower flange of the H-shaped steel or the I-shaped steel.

[0022] In some embodiments, the space truss is composed of an upper chord, a lower chord, and a diagonal member.

[0023] In some embodiments, the two ends of the upper chord of the center column crane beam space truss are welded to the upper part of the stiffening connecting plates of the two rows of center column crane beams, the two ends of the lower chord are welded to the lower part of the stiffening connecting plates of the two rows of center column crane beams, and the two ends of the diagonal web are respectively welded to the stiffening connecting plates of the two rows of center column crane beams.

[0024] In some embodiments, one end of the upper chord and the lower chord of the side column crane beam space truss are respectively welded to the upper and lower parts of the stiffening connecting plate of the side column crane beam, and the other end is respectively welded to the upper and lower parts of the side column connecting ribs on the side column, and the two ends of the diagonal web are respectively welded to the stiffening connecting plate of the side column crane beam and the side column connecting ribs on the side column.

[0025] In some embodiments, the diagonal brace is X-shaped or scissor-shaped.

[0026] In some embodiments, the upper chord, the lower chord, the diagonal web and the stiffening connecting plate are welded by on-site fillet welds.

[0027] In some embodiments, the lattice composite crane beam further comprises:

[0028] A horizontal cross tie rod is arranged between two adjacent center column crane beam space trusses. The horizontal cross tie rod is X-shaped, and its two ends are respectively connected and fixed to the two center column crane beam space trusses.

[0029] In some embodiments, the lattice composite crane beam further comprises:

[0030] A horizontal brace is arranged between the side column crane beam space truss and the side column crane beam. The horizontal brace is triangular in shape, and its two ends are respectively connected and fixed to the side column crane beam space truss and the side column crane beam.

[0031] Beneficial effects: The utility model proposes a lattice-type combined crane beam, in which two crane beams and the space truss between them form an overall space structure, so that the two crane beams are jointly stressed and jointly resist external loads. The crane beams provide lateral support to each other through the upper chord of the space truss, avoiding the instability of the crane beam out of the plane, reducing the calculated length of the crane beam out of the plane, and at the same time, the space truss has sufficient rigidity to coordinate the deformation between the crane beams. Specifically, at least the following beneficial effects can be obtained:

[0032] (1) The utility model provides a lattice-type composite crane beam, in which a space truss can provide out-of-plane support for the crane beam, thereby reducing the out-of-plane calculated length of the crane beam. The bearing capacity of a traditional crane beam is mostly controlled by the stable bearing capacity, thereby reducing the cross-sectional size of the crane beam and saving a large amount of steel.

[0033] (2) The utility model provides a lattice-type composite crane beam, which combines the crane beam and the space truss into a whole. The crane beam is subjected to force as a whole and jointly resists the external load. The bearing capacity of the crane beam is greatly improved. That is to say, under the condition of unchanged load, the corresponding cross-section of the crane beam can be greatly reduced, which can save a lot of steel and is more economical.

[0034] (3) The utility model provides a lattice-type composite crane beam, which combines the crane beam and the space truss into a whole, greatly improving the rigidity of the crane beam, thereby reducing the deformation of the crane beam and solving the problem of large deformation of the conventional crane beam when fully loaded.

[0035] (4) The utility model provides a lattice-type composite crane beam, which combines the crane beam and the space truss into a whole, greatly improving the overall stiffness of the factory building structure, thereby reducing the overall structural deformation of the factory building caused by the braking of the trolley and the car, especially when the heavy-duty working load is large. The effect is significant, and at the same time, it can also reduce the structural deformation under the action of earthquake load and wind load.

[0036] (5) The utility model provides a lattice-type composite crane beam, which has a simple structure and is easy and quick to construct, and has little impact on the construction period.

[0037] It should be understood that the implementation of any embodiment of the present utility model does not mean that multiple or all of the above-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0039] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0040] Figure 1 The utility model is exemplarily shown as a plan layout diagram of a lattice-type combined crane beam (center column crane beam);

[0041] Figure 2 Exemplary illustration Figure 1Section Ⅰ-Ⅰ in the figure;

[0042] Figure 3 Exemplary illustration Figure 1 Section II-II in the figure;

[0043] Figure 4 Exemplary illustration Figure 1 Ⅱ-Ⅱ cross-sectional view (another embodiment);

[0044] Figure 5 The utility model is exemplarily shown as a plan layout diagram of a lattice-type combined crane beam (side column crane beam);

[0045] Figure 6 Exemplary illustration Figure 5 Section III-III in the figure;

[0046] Figure 7 Exemplary illustration Figure 5 Ⅲ-Ⅲ cross-sectional view in (another implementation method).

[0047] Markings in the figure:

[0048] 1. Crane beam; 11. Center column crane beam; 12. Side column crane beam; 13. Stiffening connecting plate;

[0049] 2. Space truss; 21. Center column crane beam space truss; 211. Upper chord; 212. Lower chord; 213. Diagonal web; 22. Side column crane beam space truss;

[0050] 3. Middle column;

[0051] 4. Side column; 41. Side column connecting ribs; 42. Horizontal ribs;

[0052] 5. Ox leg;

[0053] 6. Horizontal cross tie rod;

[0054] 7. Horizontal support rod.

[0055] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in combination with the embodiment and the drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0059] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and cannot be understood as a limitation on the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] Crane beams are usually used in factories. They are beam structures that support the operation of bridge cranes. There are crane tracks on the beams, and the cranes travel back and forth on the crane beams through the tracks. Factory buildings usually have multiple spans in the horizontal direction and can be divided into multiple frames in the vertical direction. Side columns are arranged on both sides of the factory building, and one or more rows of middle columns are arranged in the middle. The side columns and middle columns are used as vertical load-bearing structures.

[0062] In view of the shortcomings of existing crane beams, such as poor overall stiffness and stability, complex structure, large amount of steel, or difficulty in manufacturing and construction, the utility model proposes a lattice-type combined crane beam, which can be widely used in various industrial and civil buildings with crane requirements.

[0063] The implementation of the present invention is described in detail below in conjunction with preferred implementation modes.

[0064] The utility model proposes a lattice-type combined crane beam, see Figure 1 , Figure 5 , Figure 1 The plan view of the center column crane beam of an embodiment of the utility model is exemplarily shown. Figure 5 The plan layout diagram of the side column crane beam of an embodiment of the utility model is shown by way of example. The lattice-type composite crane beam mainly includes a crane beam 1 and a space truss 2 between the crane beam 1. The crane beam 1 and the space truss 2 form a force-bearing whole, which bear the force together and resist the external load (the specific degree of coordinated deformation and joint force is related to the stiffness of the space truss). In this way, higher stiffness and overall stability can be obtained, and in particular, large deformation and out-of-plane instability can be avoided.

[0065] Specifically, the crane beam 1 includes a center column crane beam 11 and a side column crane beam 12. The center column crane beam 11 is supported by the center column 3. The center column 3 is the vertical support structure at the mid-span of the plant structure, and together with the side column 4, it constitutes the vertical bearing structure of the plant structure. In the embodiment of the utility model, the center column crane beam 11 is arranged in two rows. The two rows of center column crane beams 11 are arranged opposite to each other on the left and right sides of the center column 3. Corbels 5 are provided at corresponding heights on the left and right sides of the center column 3. The corbel structure is not specifically limited in the utility model. For example, it is formed by the common I-beam bevel cutting, and a stiffening plate can be welded at the position directly below the corresponding crane beam. The two rows of center column crane beams 11 are supported by the corbels 5 on the left and right sides of the center column 3, respectively. Figure 2 As shown, the corbels 5 are symmetrically arranged at the same height on the left and right sides of the center column 3, and the two rows of center column crane beams 11 are also symmetrically arranged at the same height. However, it can be understood that the two rows of center column crane beams 11 can also be set at different heights as needed, that is, one side is set higher and the other side is set lower, which is also feasible for the utility model.

[0066] Likewise, if Figure 5 , Figure 6 As shown, a row of side column crane beams 12 are arranged on the side column 4, and are arranged on the inner side of the side column 4. The so-called inner side is the side facing the inside of the plant space, relative to the outer side. A corbel 5 is arranged at a corresponding height on the inner side of the side column 4, and the side column crane beam 12 is supported by the corbel 5 on the side column 4. It can be understood that the height of the side column crane beam 12 can be set at the same height as the center column crane beam 11, and of course the heights of the two can also be different.

[0067] In the embodiment of the present utility model, Figure 1 , Figure 3The middle column 3 and the side column 4 are made of H-shaped steel or welded I-shaped steel, and the crane beam 1 is also made of H-shaped steel or welded I-shaped steel. The H-shaped steel or welded I-shaped steel has an upper flange, a lower flange and a web, and the cross-section of the H-shaped steel or welded I-shaped steel is determined according to calculation.

[0068] In order to enhance the rigidity and stability of the crane beam 1, a stiffening connecting plate 13 is provided on the crane beam 1. A plurality of stiffening connecting plates 13 are arranged at intervals along the longitudinal direction of the H-shaped steel or the I-shaped steel, with a spacing of no more than 2H, where H is the height of the H-shaped steel or the welded I-shaped steel. The thickness of the stiffening connecting plate 13 only needs to meet the structural requirements and the local stability requirements, and is generally 6-16 mm.

[0069] The top and sides of the stiffening connecting plate 13 are welded to the upper flange and web of the H-shaped steel or welded I-shaped steel, and the bottom of the stiffening connecting plate 13 is not connected to the lower flange of the H-shaped steel or welded I-shaped steel, leaving a certain distance, generally 100-200mm, to avoid welding residual stress affecting the performance of the steel and causing fatigue damage.

[0070] Continue to see Figure 1 , Figure 3 The space truss 2 at least includes a center column crane beam space truss 21, which is a space truss arranged on the center column crane beam 11. The center column crane beam space truss 21 is arranged between two rows of center column crane beams 11 on the left and right sides of the center column 3 at a predetermined interval along the longitudinal direction, and its two ends are respectively connected and fixed to the two rows of center column crane beams 11. It is easy to understand that within the length of a center column crane beam 11, the center column crane beam space truss 21 can be flexibly set as one group, two groups or more groups, which are specifically set according to the length of a center column crane beam 11 and the specific requirements of the structure for stiffness, stability and deformation.

[0071] Thus, it can be known that, with the help of the middle column crane beam space truss 21 between the middle column crane beams 11 and the middle column crane beams 11, the original crane beam structure forms a lattice-type combined crane beam force-bearing entity, which can bear force together to resist external loads.

[0072] Continue to see Figure 5 , Figure 6 In the embodiment of the utility model, the space truss 2 also includes a side column crane beam space truss 22, that is, a space truss 2 is added to the side column crane beam 12, and the side column crane beam space truss 22 is arranged between the side column crane beam 12 and the side column 4 at a predetermined position close to the side column 4, and its two ends are respectively connected and fixed to the side column crane beam 12 and the side column 4, and the three form a triangular configuration, so that the side column crane beam 12 and the side column crane beam space truss 22 also constitute a lattice-type combined crane beam force-bearing whole.

[0073] The middle column crane beam space truss 21 and the side column crane beam space truss 22 connect the middle column crane beam 11 and the side column crane beam 12 with the middle column 3 and the side column 4 to form a force-bearing whole, thereby providing out-of-plane support for the crane beam, enhancing the overall stability of the crane beam, and also greatly improving the rigidity of the crane beam, thereby reducing the deformation of the crane beam.

[0074] Continue to see Figure 3 In the embodiment of the utility model, a specific space truss structure is provided. Taking the center column crane beam space truss 21 as an example, it is composed of an upper chord 211, a lower chord 212 and a diagonal web 213. The diagonal web 213 is X-shaped or scissor-shaped, connected with the upper chord 211 and the lower chord 212 to form a space truss structure. It should be noted that the upper chord 211 of the space truss 2 can provide lateral support to prevent the crane beam from losing stability outside the plane, while the lower chord of the space truss 2 is not necessary and is determined according to actual conditions.

[0075] Specifically, the two ends of the upper chord 211 of the center column crane beam space truss 21 are welded to the upper part of the stiffening connecting plates 13 of the two rows of center column crane beams 11, and the two ends of the lower chord 212 are welded to the lower part of the stiffening connecting plates 13 of the two rows of center column crane beams 11. The diagonal web 213 is X-shaped, and the two ends are respectively welded to the stiffening connecting plates 13 of the two rows of center column crane beams 11. Specifically, the upper part of the X-shape is respectively welded to the upper part of the stiffening connecting plates 13 of the two rows of center column crane beams 11, and the lower part of the X-shape is respectively welded to the lower part of the stiffening connecting plates 13 of the two rows of center column crane beams 11. The upper and lower parts of the X-shape can be welded to the upper chord 211 and the lower chord 212 at the same position, and the welding can be completed at one time. Of course, the two ends of the upper chord 211 can also be directly welded to the upper flanges of the two rows of center column crane beams 11, such as Figure 4 As shown, the two ends of the lower chord 212 cannot be welded to the lower flange of the center column crane beam 11, because the lower flange is under tension and welding is affected by residual stress.

[0076] The side column crane beam space truss 22 has the same structure as the middle column crane beam space truss 21, but the connection and fixing methods are different. At one end of the side column crane beam 12, its upper chord 211 is welded to the upper part of the stiffening connection plate 13 of the side column crane beam 12, the lower chord 212 is welded to the lower part of the stiffening connection plate 13 of the side column crane beam 12, and the diagonal web member 213 is welded to the stiffening connection plate 13 of the side column crane beam 12, in the same manner as the middle column crane beam space truss 21. The difference is that the side column crane beam space truss 22 is located at one end of the side column 4, and a side column connecting rib 41 is correspondingly provided on the side column 4. The side column connecting rib 41 is welded to the web of the side column 4, and the height position corresponds to the stiffening connection plate 13 on the side column crane beam 12. The upper chord 211, the lower chord 212, and the diagonal web member 213 are respectively welded to the upper and lower parts of the side column connecting rib 41.

[0077] Since the side column connecting rib plate 41 is only welded and fixed to the web of the side column 4 at its inner side, in order to further enhance the strength and stability of the side column connecting rib plate 41 and ensure the stable connection of the side column crane beam space truss 22 here, a horizontal rib plate 42 can be further welded above the side column connecting rib plate 41. Figure 7 As shown, the inner side of the horizontal rib 42 is welded and fixed to the web of the side column 4, and the two ends are welded and fixed to the left and right flanges of the side column 4, and the upper edge of the side column connecting rib 41 is welded and fixed to the horizontal rib 42.

[0078] Obviously, the stiffening connecting plate 13 provided on the crane beam 1 can not only enhance the rigidity and stability of the crane beam 1, but also serve as an auxiliary means for welding and connecting the space truss 2, providing convenience for the subsequent connection of the space truss 2. The upper chord, the lower chord and the diagonal web are welded to the stiffening connecting plate by on-site corner welds, so that the space truss 2 can be conveniently welded and connected to the stiffening connecting plate 13, which is convenient for construction and does not affect the installation accuracy of the crane beam. There is no need to perform welding operations on the crane beam 1 to generate welding stress or stress concentration, and there is no effect on the upper and lower flanges of the crane beam.

[0079] Continue to see Figure 1 The lattice-type composite crane beam also includes a horizontal cross tie rod 6, which is arranged between two adjacent center column crane beam space trusses 21, and its two ends are respectively connected and fixed to the two center column crane beam space trusses 21, thereby further enhancing the overall stability of the center column crane beam space trusses 21.

[0080] In the embodiment of the utility model, the horizontal cross tie rods 6 are arranged in an X-shape or scissor-shape on the plane, for example. Of course, multiple groups can be arranged vertically to firmly tie the two center column crane beam space trusses 21.

[0081] See also Figure 5 The lattice-type composite crane beam also includes a horizontal brace 7, which is arranged between the side column crane beam space truss 22 and the side column crane beam 12, and its two ends are respectively connected and fixed to the side column crane beam space truss 22 and the side column crane beam 12. Specifically, one end can be welded and fixed to the side column crane beam space truss 22, and the other end can be welded and fixed to the stiffening connecting plate 13 on the side column crane beam 12, thereby further enhancing the overall stability of the side column crane beam space truss 22.

[0082] In the embodiment of the utility model, the horizontal support rods 7 are arranged in a triangle shape by sampling two support rods on the plane, and of course multiple groups can be arranged in the vertical direction to stably tie the side column crane beam space truss 22 and the side column crane beam 12 together.

[0083] In the embodiment of the utility model, the cross-section of the upper chord, lower chord and diagonal web can be steel bars, steel sections, steel plates, etc. The cross-section of the steel bars is usually 12mm to 36mm, and the steel sections are usually angle steel or thin-walled steel sections, steel pipes, etc. The cross-section of the upper chord is generally larger than that of the lower chord and diagonal web. The spacing of the trusses is determined according to the height of the crane beam and the stable bearing capacity of the crane beam, and is generally 1 to 4m.

[0084] In the embodiment of the utility model, the horizontal cross tie rod 6 and the horizontal support rod 7 can be made of round steel or angle steel. Commonly used round steel is more, and the diameter is 20mm to 30mm.

[0085] It is obvious from the above explanation that the two crane beams of the utility model and the space truss therebetween form an overall space structure, so that the two crane beams are jointly subjected to force and jointly resist external loads. The crane beams provide lateral support to each other through the upper chords of the space truss, avoiding instability out of the plane of the crane beams and reducing the calculated length out of the plane of the crane beams. At the same time, the space truss has sufficient rigidity to coordinate the deformation between the crane beams.

[0086] Although several specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present invention. Certain features described in the context of a separate embodiment may also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation may also be implemented in multiple implementations individually or in any suitable sub-combination.

[0087] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A lattice-type composite crane beam, characterized in that: The lattice type composite crane beam comprises: A crane beam, wherein the crane beam comprises a center column crane beam and a side column crane beam, wherein two rows of the center column crane beams are arranged on the left and right sides of the center column and are supported by the corbels on the left and right sides of the center column respectively, and one row of the side column crane beams is arranged on the inner side of the side column and is supported by the corbels of the side column; A space truss, wherein the space truss at least comprises a center column crane beam space truss, wherein the center column crane beam space truss is arranged longitudinally at a predetermined interval between two rows of center column crane beams on the left and right sides of the center column, and the two ends of the space truss are respectively connected and fixed to the two rows of center column crane beams; and The middle column crane beam space trusses between the middle column crane beams form a lattice-type combined crane beam force-bearing entity.

2. The lattice-type composite crane beam according to claim 1, characterized in that: The space truss also includes: A side column crane beam space truss is arranged between the side column crane beam and the side column at a predetermined position close to the side column, and its two ends are respectively connected and fixed to the side column crane beam and the side column, so that the side column crane beam and the side column crane beam space truss form a lattice-type combined crane beam force-bearing whole.

3. The lattice-type composite crane beam according to claim 1 or 2, characterized in that: The crane beam is composed of H-shaped steel or I-shaped steel welded with a plurality of stiffening connecting plates, wherein the plurality of stiffening connecting plates are arranged at intervals along the longitudinal direction of the H-shaped steel or I-shaped steel, the top and sides of the stiffening connecting plates are welded to the upper flange and web of the H-shaped steel or I-shaped steel, and a certain distance is left between the bottom of the stiffening connecting plates and the lower flange of the H-shaped steel or I-shaped steel.

4. The lattice type composite crane beam according to claim 3, characterized in that: The space truss consists of an upper chord, a lower chord and a diagonal web.

5. The lattice type composite crane beam according to claim 4, characterized in that: The two ends of the upper chord of the center column crane beam space truss are welded to the upper parts of the stiffening connecting plates of the two rows of center column crane beams, the two ends of the lower chord are welded to the lower parts of the stiffening connecting plates of the two rows of center column crane beams, and the two ends of the diagonal web are respectively welded to the stiffening connecting plates of the two rows of center column crane beams.

6. The lattice-type composite crane beam according to claim 4, characterized in that: One end of the upper chord and the lower chord of the side column crane beam space truss are respectively welded to the upper and lower parts of the stiffening connection plate of the side column crane beam, and the other end is respectively welded to the upper and lower parts of the side column connecting rib plate on the side column, and the two ends of the diagonal web are respectively welded to the stiffening connection plate of the side column crane beam and the side column connecting rib plate on the side column.

7. The lattice type composite crane beam according to claim 5 or 6, characterized in that: The oblique belly rod is in an X-shape or a scissors-shape.

8. The lattice type composite crane beam according to claim 5 or 6, characterized in that: The upper chord, the lower chord, the diagonal web and the stiffening connecting plate are welded by on-site fillet welds.

9. The lattice type composite crane beam according to claim 1, characterized in that: The lattice type composite crane beam also includes: A horizontal cross tie rod is arranged between two adjacent center column crane beam space trusses. The horizontal cross tie rod is X-shaped, and its two ends are respectively connected and fixed to the two center column crane beam space trusses.

10. The lattice type composite crane beam according to claim 1, characterized in that: The lattice type composite crane beam also includes: A horizontal brace is arranged between the side column crane beam space truss and the side column crane beam. The horizontal brace is triangular in shape, and its two ends are respectively connected and fixed to the side column crane beam space truss and the side column crane beam.

Images