Main beam of crane and crane

Abstract

The present invention belongs to the technical field of cranes, and specifically relates to a main beam, providing a main beam of a crane and a crane. The main beam of the crane includes upper and lower chord beams and diagonal bracing units. The diagonal bracing units are in the shape of a human figure and consist of a long diagonal bracing member and a short diagonal bracing member. The bottom ends of the long and short diagonal bracing members are both connected to the lower chord beam, and the top end of the short diagonal bracing member is connected to the middle of the length direction of the long diagonal bracing member, or the top ends of the long and short diagonal bracing members are both connected to the upper chord beam, and the bottom end of the short diagonal bracing member is connected to the middle of the length direction of the long diagonal bracing member. Every two adjacent diagonal bracing units form a diagonal bracing unit group, and each diagonal bracing unit group is arranged along the extension direction of the main beam of the crane. The long diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other along the extension direction of the main beam of the crane, or the short diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other along the extension direction of the main beam of the crane, which can solve the technical problem of the inconvenience of processing the X-shaped diagonal bracing unit or the V-shaped diagonal bracing unit of the main beam in the prior art.

Description

Technical Field

[0001] The invention belongs to the technical field of cranes, and in particular relates to a main beam. Background Art

[0002] Existing crane main beams, such as those disclosed in patent application publication number CN101973485A, employ a new electric hoist single-girder bridge crane. The main beam of this new electric hoist single-girder bridge crane is a box-shaped structure formed by upper and lower decks and a web disposed between the decks. Angle steel is installed on the inside of the web to strengthen the main beam. A thick plate is installed between the lower deck and the web. The thick plate forms a track on the outer edge of the web for the wheels of the electric hoist's operating mechanism. Because the upper and lower decks and the web are all plate-like structures, the main beam is heavy and inconvenient to install. For example, the crane involved in the automatic welding device for the web reinforcement steel of the crane main beam disclosed in the patent document with the authorization announcement number CN207982519U has a main beam that is also a box-type structure surrounded by upper and lower cover plates and web plates. The current main beam is a large structure, and the upper and lower cover plates and web plates are relatively long. The two cover plates are welded to the web plates, and the weld between the cover plates and the web plates is long, which makes it difficult to ensure the quality of the weld and increases the difficulty of the welding work.

[0003] There are also some truss-type main beams of cranes in the prior art, such as the crane disclosed in the patent document with authorization announcement number CN108025894B, which includes at least one crane beam, especially a bridge crane or a gantry crane. The main beam of the crane in the patent document (i.e., the beam in CN108025894B) includes an upper chord beam (i.e., the upper arm in CN108025894B) and a lower chord beam (i.e., the lower arm in CN108025894B). A diagonal bracing unit (i.e., a pair of support rods in CN108025894B) is provided between the upper chord beam and the lower chord beam in the extension direction of the two chord beams. Each diagonal bracing unit includes a first support rod and a second support rod, and the two support rods are inclined back to back and arranged in an X shape. However, since the two support rods are connected at the middle, a slot-shaped notch must be provided on one of the support rods to allow the other to be clipped in, which is inconvenient to manufacture. To avoid the resulting weakening of the support rods, the connecting weld between the two support rods must be of high quality, and it is difficult to ensure uniform stress on both sides of the same support rod. Furthermore, since the horizontal force generated by the back-and-forth swing of the load hoisted by the crane during the lifting process is mainly transmitted to the lower chord through the crane trolley, and then transmitted from the lower chord to the entire main beam and the entire crane, the lower chord bears the vast majority of the horizontal force. The X-shaped diagonal bracing units have two connection points with both the upper and lower chords, which does not conform to the crane's load-bearing characteristics. The lower chord is subjected to greater stress and is prone to breakage.

[0004] Patent document CN104781179B, a prior art publication, discloses a crane, particularly a bridge crane or overhead crane, comprising at least one crane girder. The crane's main girder in this patent document comprises an upper chord and a lower chord. A diagonal bracing unit is provided between the upper and lower chords in the direction in which the two chords extend. Each diagonal bracing unit comprises a first diagonal brace rod and a second diagonal brace rod, and the two diagonal braces are tilted away from each other, forming a V-shape or an inverted V-shape. A vertical column is provided between the two diagonal braces rods. The main girder in this patent document includes both single-beam and double-beam technical solutions. When the main girder is a single-beam, the crane trolley travels along the flange of the lower chord, which undoubtedly bears the greatest stress. In this case, the diagonal bracing units are arranged in a forward orientation, forming two connection points between the two diagonal braces in the diagonal bracing unit and the lower chord. This results in fewer connection points between the support unit and the lower chord, necessitating the installation of vertical columns for reinforcement. When the main beam is a double beam, the lifting trolley runs on the upper chord of the main beam, so it is more reasonable to set the V-shaped support unit upside down. It is also necessary to set vertical columns between the two diagonal braces of each diagonal bracing unit for reinforcement. Therefore, no matter whether the two diagonal bracing rods in the diagonal bracing unit are arranged in a V shape or an inverted V shape, vertical columns need to be set for reinforcement. However, since the vertical column is located between the two diagonal bracing rods, it is difficult to weld the vertical column and the two diagonal bracing rods. If bolt connection is used, it will affect the connection strength between the diagonal bracing rods and the vertical column and the upper and lower chord beams, thereby affecting the structural strength of the entire main beam. In addition, the processing and manufacturing are difficult and the cost is high. In addition, a groove needs to be set at the bottom end of the diagonal bracing rod in the diagonal bracing unit to avoid interference with the web protruding upward from the lower chord beam, and welding with the upper and lower chord beams by setting welding grooves on both sides of the diagonal bracing rod is inconvenient to process. Summary of the Invention

[0005] The present invention aims to provide a main beam of a crane to solve the technical problem of the inconvenience of processing the X-shaped or V-shaped diagonal bracing units of the main beam in the prior art. The present invention also provides a crane to solve the above technical problem.

[0006] To achieve the above-mentioned purpose, the technical solution of the main beam of the crane provided by the present invention is: a main beam of the crane, comprising an upper chord beam, a lower chord beam and a diagonal bracing unit connected between the upper chord beam and the lower chord beam, the diagonal bracing unit is in the shape of a "human", and consists of a long diagonal bracing member and a short diagonal bracing member; the bottom ends of the long diagonal bracing member and the short diagonal bracing member are both connected to the lower chord beam, and the top ends of the short diagonal bracing member are connected to the middle part of the length direction of the long diagonal bracing member, or the top ends of the long diagonal bracing member and the short diagonal bracing member are both connected to the upper chord beam, and the bottom ends of the short diagonal bracing member are connected to the middle part of the length direction of the long diagonal bracing member; every two adjacent diagonal bracing units form a diagonal bracing unit group, and each diagonal bracing unit group is arranged along the extension direction of the main beam of the crane; the long diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other along the extension direction of the main beam of the crane, or the short diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other along the extension direction of the main beam of the crane.

[0007] The beneficial effect is: compared with the two support rods of the main beam diagonal bracing unit in the prior art that are arranged in an X-shape or V-shape, the long diagonal bracing members and short diagonal bracing members of the diagonal bracing unit of the present invention are arranged in a "human" shape, and there is no need to set a groove structure on the long support member. The short diagonal bracing member is directly connected to the middle part of the long diagonal bracing member in the length direction, so that the structure of the long diagonal bracing member is relatively flat, the force is relatively uniform, the structure is simple, and it is easy to manufacture; and the two long diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other or the two short diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other, which can form a symmetrical structure with relatively balanced force, which is beneficial to improving the stability of the main beam.

[0008] As a further improvement, the long diagonal brace and the short diagonal brace both include a flat plate portion and a side portion connected to the flat plate portion, and the side portion and the flat plate portion form a C-shaped structure; the side portion of the long diagonal brace is connected to the side portion of the short diagonal brace, and the flat plate portion of the long diagonal brace is connected to the flat plate portion of the short diagonal brace.

[0009] The beneficial effect is that both the long diagonal bracing piece and the short diagonal bracing piece are provided with side portions, and both are connected by surface contact, which is convenient for connection and helps to improve the connection strength between the long diagonal bracing piece and the short diagonal bracing piece.

[0010] As a further improvement, the width of the flat plate of the long diagonal bracing member is consistent with the width of the flat plate of the short diagonal bracing member, and the short diagonal bracing member is provided with an avoidance stop.

[0011] The beneficial effect is that the short diagonal bracing piece is provided with an avoidance stop, so that the end of the short diagonal bracing piece can be embedded between the two side edges of the long diagonal bracing piece, which is convenient for connection.

[0012] As a further improvement, the upper chord beam includes a front upper cross beam and a rear upper cross beam, the cross sections of the front upper cross beam and the rear upper cross beam are both L-shaped, the upper chord beam includes a transverse bending portion and a vertical bending portion, the corners of the upper chord beam form the edges of the upper chord beam, the ends of the diagonal braces are connected to the inner side surfaces of the transverse bending portions, and the outer side surfaces of the side edges of the diagonal braces are abutted against the inner side surfaces of the vertical bending portions.

[0013] The beneficial effect is that the cross section of the upper chord is L-shaped, so that the side of the diagonal brace is in surface contact with the upper chord, and the contact area is large, which is conducive to improving the connection strength between the diagonal brace and the upper chord.

[0014] As a further improvement, the long diagonal bracing member and the short diagonal bracing member are both planar frame structures, including a frame body corresponding to the edge of the plane, and the middle of the frame body is a hollow structure.

[0015] The beneficial effects are: the long diagonal bracing members and the short diagonal bracing members are both frame structures, and the middle of the frame is hollow, which saves material and manufacturing costs, reduces the overall weight of the main beam, and complies with the lightweight design.

[0016] As a further improvement, a rib plate perpendicular to the plane where the planar frame is located is provided at the edge of the opening formed by the hollow structure.

[0017] The beneficial effect is that the ribs are provided at the edges of the hollow structure, which is beneficial to improving the structural strength of the long diagonal bracing members and the short diagonal bracing members, thereby improving the strength and stability of the diagonal bracing unit.

[0018] As a further improvement, the frame of the long diagonal brace is in a "mouth" shape, the frame of the short diagonal brace is in a "U" shape, and the open end of the short diagonal brace is connected to the middle part of the long diagonal brace in the length direction.

[0019] The beneficial effects are: the contact area between the "U"-shaped long diagonal brace and the upper and lower chord beams is large, and the connection strength is high; the "U"-shaped short diagonal brace can save materials and facilitate manufacturing without affecting the overall strength of the diagonal brace unit.

[0020] As a further improvement, there is a gap between the top ends of two adjacent long diagonal bracing members along the extension direction of the main beam of the crane.

[0021] The beneficial effect is that there is a gap between the top ends of the two connected long diagonal bracing members, which facilitates connection.

[0022] As a further improvement, there is a gap between the ends of the two adjacent diagonal bracing units in the upper and lower directions corresponding to the bottom of the "human" shape along the extension direction of the main beam of the crane.

[0023] The beneficial effect is that there is a gap between two adjacent diagonal bracing units and one end corresponding to the bottom of the "human" shape, thereby avoiding interference between the adjacent diagonal bracing units during installation and facilitating installation.

[0024] The technical solution of the crane provided by the present invention is: a crane, including a main beam and an end beam, both ends of the main beam are provided with a support structure for connecting to the end beam, the crane also includes a lifting trolley, the lifting trolley is movably assembled on the main beam along the extension direction of the main beam, the main beam includes an upper chord beam, a lower chord beam and a diagonal bracing unit connected between the upper chord beam and the lower chord beam, the diagonal bracing unit is in a "human" shape, and is composed of a long diagonal bracing piece and a short diagonal bracing piece; the bottom ends of the long diagonal bracing piece and the short diagonal bracing piece are both connected to the lower chord beam, and the short diagonal bracing piece is connected to the lower chord beam. The top end is connected to the middle part of the long diagonal brace in the longitudinal direction, or the top ends of the long diagonal brace and the short diagonal brace are both connected to the upper chord beam, and the bottom end of the short diagonal brace is connected to the middle part of the long diagonal brace in the longitudinal direction; every two adjacent diagonal brace units form a diagonal brace unit group, and each diagonal brace unit group is arranged along the extension direction of the main beam of the crane; the long diagonal braces in the same diagonal brace unit group are arranged adjacent to each other along the extension direction of the main beam of the crane, or the short diagonal braces in the same diagonal brace unit group are arranged adjacent to each other along the extension direction of the main beam of the crane.

[0025] The beneficial effect is: compared with the two support rods of the main beam diagonal bracing unit in the prior art that are arranged in an X-shape or V-shape, the long diagonal bracing members and short diagonal bracing members of the diagonal bracing unit of the present invention are arranged in a "human" shape, and there is no need to set a groove structure on the long support member. The short diagonal bracing member is directly connected to the middle part of the long diagonal bracing member in the length direction, so that the structure of the long diagonal bracing member is relatively flat, the force is relatively uniform, the structure is simple, and it is easy to manufacture; and the two long diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other or the two short diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other, which can form a symmetrical structure with relatively balanced force, which is beneficial to improving the stability of the main beam.

[0026] As a further improvement, the long diagonal brace and the short diagonal brace both include a flat plate portion and a side portion connected to the flat plate portion, and the side portion and the flat plate portion form a C-shaped structure; the side portion of the long diagonal brace is connected to the side portion of the short diagonal brace, and the flat plate portion of the long diagonal brace is connected to the flat plate portion of the short diagonal brace.

[0027] The beneficial effect is that both the long diagonal bracing piece and the short diagonal bracing piece are provided with side portions, and both are connected by surface contact, which is convenient for connection and helps to improve the connection strength between the long diagonal bracing piece and the short diagonal bracing piece.

[0028] As a further improvement, the width of the flat plate of the long diagonal bracing member is consistent with the width of the flat plate of the short diagonal bracing member, and the short diagonal bracing member is provided with an avoidance stop.

[0029] The beneficial effect is that the short diagonal bracing piece is provided with an avoidance stop, so that the end of the short diagonal bracing piece can be embedded between the two side edges of the long diagonal bracing piece, which is convenient for connection.

[0030] As a further improvement, the upper chord beam includes a front upper cross beam and a rear upper cross beam, the cross sections of the front upper cross beam and the rear upper cross beam are both L-shaped, the upper chord beam includes a transverse bending portion and a vertical bending portion, the corners of the upper chord beam form the edges of the upper chord beam, the ends of the diagonal braces are connected to the inner side surfaces of the transverse bending portions, and the outer side surfaces of the side edges of the diagonal braces are abutted against the inner side surfaces of the vertical bending portions.

[0031] The beneficial effect is that the cross section of the upper chord is L-shaped, so that the side of the diagonal brace is in surface contact with the upper chord, and the contact area is large, which is conducive to improving the connection strength between the diagonal brace and the upper chord.

[0032] As a further improvement, the long diagonal bracing member and the short diagonal bracing member are both planar frame structures, including a frame body corresponding to the edge of the plane, and the middle of the frame body is a hollow structure.

[0033] The beneficial effects are: the long diagonal bracing members and the short diagonal bracing members are both frame structures, and the middle of the frame is hollow, which saves material and manufacturing costs, reduces the overall weight of the main beam, and complies with the lightweight design.

[0034] As a further improvement, a rib plate perpendicular to the plane where the planar frame is located is provided at the edge of the opening formed by the hollow structure.

[0035] The beneficial effect is that the ribs are provided at the edges of the hollow structure, which is beneficial to improving the structural strength of the long diagonal bracing members and the short diagonal bracing members, thereby improving the strength and stability of the diagonal bracing unit.

[0036] As a further improvement, the frame of the long diagonal brace is in a "mouth" shape, the frame of the short diagonal brace is in a "U" shape, and the open end of the short diagonal brace is connected to the middle part of the long diagonal brace in the length direction.

[0037] The beneficial effects are: the contact area between the "U"-shaped long diagonal brace and the upper and lower chord beams is large, and the connection strength is high; the "U"-shaped short diagonal brace can save materials and facilitate manufacturing without affecting the overall strength of the diagonal brace unit.

[0038] As a further improvement, there is a gap between the top ends of two adjacent long diagonal bracing members along the extension direction of the main beam of the crane.

[0039] The beneficial effect is that there is a gap between the top ends of the two connected long diagonal bracing members, which facilitates connection.

[0040] As a further improvement, there is a gap between the ends of the two adjacent diagonal bracing units in the upper and lower directions corresponding to the bottom of the "human" shape along the extension direction of the main beam of the crane.

[0041] The beneficial effect is that there is a gap between two adjacent diagonal bracing units and one end corresponding to the bottom of the "human" shape, thereby avoiding interference between the adjacent diagonal bracing units during installation and facilitating installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the assembly of the main beam and the lifting trolley of the crane provided by the present invention;

[0043] Figure 2 Schematic diagram of the structure of the front upper crossbeam;

[0044] Figure 3 Schematic diagram of the structure of the front lower crossbeam;

[0045] Figure 4 It is a structural diagram of the diagonal bracing unit group;

[0046] Figure 5 Schematic diagram of the assembly of long diagonal bracing members and short diagonal bracing members;

[0047] Figure 6 for Figure 5 Another perspective of

[0048] Figure 7 The cross-section of the main beam;

[0049] Figure 8 This is a schematic structural diagram of the lower chord beam in Example 8 of the crane provided by the present invention.

[0050] Explanation of the accompanying drawings: 1. Main beam; 2. Hoisting trolley; 3. Support structure; 4. Front upper crossbeam; 5. Rear upper crossbeam; 6. Front lower crossbeam; 7. Rear lower crossbeam; 8. Closing plate; 9. Seat plate; 10. Reinforcing rib plate; 11. Diagonal bracing unit group; 12. Horizontal bending part; 13. Vertical bending part; 14. Vertical plate; 15. Horizontal plate; 16. Long diagonal bracing member; 17. Long diagonal bracing flat plate; 18. Long diagonal bracing side; 19. Short diagonal bracing member; 20. Short diagonal bracing flat plate; 21. Short diagonal bracing side; 22. Long diagonal bracing frame; 23. Diagonal bracing unit; 24. Upper chord beam; 25. Lower chord beam; 26. Connecting part. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0053] It should be noted that, in the specific embodiments of the present invention, terms such as "first" and "second" and other relational terms that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of such an actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof that may appear are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the phrase "including a ..." and other defined elements that may appear do not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0054] In the description of the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] In the description of the present invention, unless otherwise expressly specified or limited, the terms "provided with" and "provided with" should be understood broadly. For example, the object "provided with" may be a part of the main body, or may be arranged separately from the main body and connected to the main body. The connection may be detachable or non-detachable. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0056] The present invention is described in further detail below with reference to the examples.

[0057] Example 1 of the crane provided in the present invention:

[0058] The crane includes a main beam 1, an end beam (not shown in the figure) and a lifting trolley 2. The left and right ends of the main beam 1 are provided with support structures 3 for supporting and connecting to the end beams. A plurality of diagonal bracing unit groups 11 are provided on the main beam 1. The end beams are used for guiding and supporting on the corresponding workshop walls or corresponding brackets. The lifting trolley 2 is guided and assembled on the main beam 1 along the extension direction of the main beam 1 for pulling the objects to be hoisted.

[0059] The existing main beam 1 includes a single beam type and a double beam type. The main beam 1 provided in this embodiment is a single beam type, and can also be used for a double beam type. Figure 1 As shown, the main beam 1 includes an upper chord beam 24 and a lower chord beam 25. The upper chord beam 24 and the lower chord beam 25 extend in the left-right direction. The upper chord beam 24 includes a front upper cross beam 4 and a rear upper cross beam 5. The front upper cross beam 4 and the rear upper cross beam 5 are arranged in parallel and spaced apart and are located on the same horizontal plane. Figure 2 As shown, the front upper cross beam 4 and the rear upper cross beam 5 have the same structure, both have an L-shaped cross section, and both include a transverse bending portion 12 and a vertical bending portion 13. The lower chord beam 25 includes a front lower cross beam 6 and a rear lower cross beam 7, which are arranged in parallel and spaced apart and located on the same horizontal plane, as shown in FIG. Figure 3As shown, the front lower cross beam 6 and the rear lower cross beam 7 have the same structure, and the cross section is inverted T-shaped, including a horizontal plate 15 and a vertical plate 14, and the vertical plate 14 is located in the middle of the horizontal plate 15. The front upper cross beam 4 and the front lower cross beam 6 are arranged in parallel and spaced apart, and the vertical bending parts of the two are located in the same vertical plane. The rear upper cross beam 5 and the rear lower cross beam 7 are arranged in parallel and spaced apart, and the vertical bending parts of the two are located in the same vertical plane. In other embodiments, as Figure 8 As shown, the front lower cross member 6 and the rear lower cross member 7 can also be manufactured in one piece.

[0060] The supporting structure 3 includes a sealing plate 8, a reinforcing rib plate 10 and a seat plate 9. Figure 1 As shown, the length of the upper chord beam 24 is greater than that of the lower chord beam 25. The seat plate 9 is L-shaped and includes an inclined vertical plate and a horizontal plate. The bottom ends of the inclined vertical plates are connected to the front lower crossbeam 6 and the rear lower crossbeam 7. The horizontal plate extends horizontally. The seat plates 9 at the left and right ends connect the front lower crossbeam 6 and the rear lower crossbeam 7 together. The bottom side of the seat plate 9 is used to be mounted on the end beams. The cover plate 8 is also L-shaped. The horizontal plate of the cover plate 8 is sandwiched between the front upper crossbeam 4 and the rear upper crossbeam 5. The bottom ends of the vertical plates of the cover plate 8 are connected to the horizontal plate of the seat plate 9. The cover plates 8 at the left and right ends connect the front upper crossbeam 4 and the rear upper crossbeam 5 together. The ribs 10 are divided into a front rib and a rear rib. Both ribs 10 are shaped like special plates. The front rib rests against the front sides of the front upper crossbeam 4 and the front lower crossbeam 6, while the rear rib rests against the rear sides of the rear upper crossbeam 5 and the rear lower crossbeam 7. The specific structure of the upper chord 24, lower chord 25, and support structure 3 described above is conventional.

[0061] like Figure 1 As shown, each diagonal bracing unit group 11 is arranged in sequence along the left and right directions. Each diagonal bracing unit group 11 is composed of two diagonal bracing units 23. The structures of each diagonal bracing unit 23 are consistent. Figures 4 to 6 As shown, each diagonal bracing unit 23 is in the shape of a "human", and the diagonal bracing unit 23 includes a long diagonal bracing member 16 and a short diagonal bracing member 19, wherein the long diagonal bracing member 16 includes a long diagonal bracing frame 22, and the long diagonal bracing frame 22 includes a long diagonal bracing flat plate 17. The middle of the long diagonal bracing flat plate 17 is hollow, forming a "mouth" shape, and a rib is provided on the edge of the "mouth" shape. Long diagonal bracing side edges 18 are provided on the front and rear edges of the long diagonal bracing flat plate 17, and the long diagonal bracing side edges 18 are arranged perpendicular to the long diagonal bracing flat plate 17, so that the cross section of the long diagonal bracing frame 22 is C-shaped.

[0062] The short diagonal brace member 19 includes a short diagonal brace frame, which includes a short diagonal brace flat plate 20. The short diagonal brace flat plate 20 is U-shaped, and a rib is provided on the edge of the U-shaped opening. Short diagonal brace side edges 21 are provided on the front and rear edges of the short diagonal brace flat plate 20. The short diagonal brace side edges 21 are arranged perpendicular to the short diagonal brace flat plate 20, so that the cross-section of the short diagonal brace frame is C-shaped. The long diagonal brace member 16 is the same width as the short diagonal brace member 19, and the U-shaped opening of the short diagonal brace member 19 faces the long diagonal brace member 16. The short diagonal brace side edges 21 of the short diagonal brace frame near the end of the long diagonal brace member 16 are provided with an avoidance stop to form a connection portion 26 at the end of the short diagonal brace member 19. When connected, as Figure 7 As shown, the connecting portion 26 of the short diagonal brace 19 is embedded in the C-shape of the long diagonal brace 16, and the open end of the short diagonal brace 19 is against the upper middle part of the long diagonal brace flat plate 17 of the long diagonal brace 16, where the middle part is the middle part of the long diagonal brace 16 in the up and down direction, and the outer side surfaces of the short diagonal brace side edges 21 on the front and rear sides of the connecting portion 26 are respectively against the inner side surfaces of the long diagonal brace side edges 18 on the front and rear sides of the long diagonal brace 16.

[0063] During assembly, the long diagonal braces and short diagonal braces, the diagonal brace units and the upper and lower chord beams, and the supporting structure and the upper and lower chord beams are all fixedly connected by welding. Figure 1 As shown, the two diagonal bracing units 23 in each diagonal bracing unit group 11 are arranged opposite each other, the short diagonal bracing members 19 of the two diagonal bracing units 23 in the same diagonal bracing unit group 11 are arranged adjacent to each other, and the spacing between the two long diagonal bracing members 16 of the two diagonal bracing units 23 in the same diagonal bracing unit group 11 gradually increases from top to bottom. The top end of the long diagonal bracing plate 17 of each long diagonal bracing member 16 abuts against the underside of the transverse bent portion 12 of the front upper crossbeam 4 and the rear upper crossbeam 5. The top outer side surfaces of the long diagonal support side edges 18 on the front and rear sides of each long diagonal support member 16 are respectively abutted and connected with the inner side surfaces of the vertical bent portions 13 of the front upper cross beam 4 and the rear upper cross beam 5, and the bottom outer side surfaces of the long diagonal support side edges 18 on the front and rear sides of each long diagonal support member 16 are respectively abutted and connected with the inner side surfaces of the vertical plates of the front lower cross beam 6 and the rear lower cross beam 7, and the bottom ends of the long diagonal support flat plates 17 of each long diagonal support member 16 are overlapped on the upper side surfaces of the transverse plates 15 of the front lower cross beam 6 and the rear lower cross beam 7. The top end of each short diagonal brace 19 is connected to the long diagonal brace 16, and the front and rear sides of the bottom end of each short diagonal brace 19 are respectively overlapped on the upper side surfaces of the transverse plates 15 of the front lower cross beam 6 and the rear lower cross beam 7, and the outer side surfaces of the bottom ends of the short diagonal brace side edges 21 on the front and rear sides of each short diagonal brace 19 are respectively abutted and connected with the inner side surfaces of the vertical plates 14 of the front lower cross beam 6 and the rear lower cross beam 7.

[0064] A crane using the above-mentioned main beam can reduce its own weight by more than 20% under the same lifting capacity conditions, thereby bringing a series of lightweight effects in terms of drive and plant configuration, which can greatly reduce construction and operation and maintenance costs.

[0065] Example 2 of the crane provided in the present invention:

[0066] The difference between this embodiment and embodiment 1 is that in embodiment 1, the short diagonal bracing members 19 of two diagonal bracing units 23 in the same diagonal bracing unit group 11 are arranged adjacent to each other, and the spacing between the two long diagonal bracing members 16 gradually increases from top to bottom. In contrast, in this embodiment, the long diagonal bracing members 16 of two diagonal bracing units 23 in the same diagonal bracing unit group 11 are arranged adjacent to each other, and the spacing between the two long diagonal bracing members 16 gradually decreases from top to bottom.

[0067] Embodiment 3 of the crane provided in the present invention:

[0068] The difference between this embodiment and embodiment 1 is that, in embodiment 1, the short diagonal bracing members 19 of two diagonal bracing units 23 in the same diagonal bracing unit group 11 are arranged adjacent to each other, the spacing between the two long diagonal bracing members 16 gradually increases from top to bottom, and the top end of the short diagonal bracing member 19 in each diagonal bracing unit 23 is connected to the long diagonal bracing member 16. In this embodiment, the short diagonal bracing members 19 of two diagonal bracing units 23 in the same diagonal bracing unit group 11 are arranged adjacent to each other, the spacing between the two long diagonal bracing members 16 gradually decreases from top to bottom, and the bottom end of the short diagonal bracing member 19 in each diagonal bracing unit 23 is connected to the long diagonal bracing member 16. In other embodiments, the long diagonal bracing members 16 of two diagonal bracing units 23 in the same diagonal bracing unit group 11 may also be arranged adjacent to each other, the spacing between the two long diagonal bracing members 16 gradually increases from top to bottom, and the bottom end of the short diagonal bracing member 19 in each diagonal bracing unit 23 is connected to the long diagonal bracing member 16.

[0069] Embodiment 4 of the crane provided in the present invention:

[0070] The difference between this embodiment and embodiment 1 is that, in embodiment 1, the top end of the short diagonal brace member 19 in each diagonal brace unit 23 is connected to a position slightly above the middle of the long diagonal brace member 16. In this embodiment, the top end of the short diagonal brace member 19 in each diagonal brace unit 23 is connected to the middle of the long diagonal brace member 16 in the vertical direction.

[0071] Embodiment 5 of the crane provided in the present invention:

[0072] The difference between this embodiment and embodiment 1 is that: in embodiment 1, the cross-sections of the long diagonal brace 16 and the short diagonal brace 19 are both C-shaped. In this embodiment, the cross-sections of the long diagonal brace 16 and the short diagonal brace 19 are both "I"-shaped, and the top end of the short diagonal brace flat plate 20 is directly connected to the long diagonal brace flat plate 17. In other embodiments, the cross-section of the long diagonal brace 16 is C-shaped, and the long diagonal brace 16 includes the long diagonal brace flat plate 17 and the long diagonal brace side 18, and the cross-section of the short diagonal brace 19 is "I"-shaped, and the short diagonal brace 19 only includes the short diagonal brace flat plate 20, and the top end of the short diagonal brace flat plate 20 is embedded in the C-shape of the long diagonal brace 16. In other embodiments, the long diagonal brace 16 and the short diagonal brace 19 can also be provided with a folded edge in the middle part as in the comparative document, and the two ends of the diagonal brace are flat plates.

[0073] Example 6 of the crane provided in the present invention:

[0074] This embodiment differs from the first embodiment in that, in the first embodiment, the width of the long diagonal brace plate 17 is the same as the width of the short diagonal brace plate 20, and the side edges of the short diagonal brace member 19 at the end connected to the long diagonal brace member 16 are smoothly bent inward, with the ends of the short diagonal brace member 19 embedded between the two side edges of the long diagonal brace member 16. In the present embodiment, however, the width of the long diagonal brace plate 17 is greater than the width of the short diagonal brace plate 20, and the side edges of the short diagonal brace member 19 are not bent. When connected, the top ends of the short diagonal brace member 19 are directly embedded between the two side edges of the long diagonal brace member 16, with the outer side surfaces of the short diagonal brace member 19 abutting against the inner side surfaces of the side edges of the long diagonal brace member 16.

[0075] Embodiment 7 of the crane provided in the present invention:

[0076] This embodiment differs from Example 1 in that, in Example 1, the front upper crossbeam 4 and the rear upper crossbeam 5 of the upper chord beam 24 have L-shaped cross sections, with the outer side surfaces of the diagonal bracing members abutting against the inner side surfaces of the vertically bent portions 13. In contrast, in this embodiment, the front upper crossbeam 4 and the rear upper crossbeam 5 of the upper chord beam 24 have inverted T-shaped cross sections, comprising vertical and horizontal plates. The outer side surfaces of the diagonal bracing members abut against the inner side surfaces of the vertical plates, and the outer sides of the horizontal and vertical plates of the front upper crossbeam 4 and the rear upper crossbeam 5 form a track for guiding the assembly of a trolley.

[0077] Example 8 of the crane provided in the present invention:

[0078] The difference between this embodiment and embodiment 1 is that: in embodiment 1, the lower chord beam 25 includes a front lower cross beam 6 and a rear lower cross beam 7, and the front lower cross beam 6 and the rear lower cross beam 7 are arranged at intervals. Figure 8 As shown, the lower chord beam 25 is integrally provided and includes a transverse plate 15 , on which two vertical plates 14 are arranged in parallel and spaced apart.

[0079] Embodiment 9 of the crane provided in the present invention:

[0080] This embodiment differs from Example 1 in that, in Example 1, the front upper crossbeam 4 and the rear upper crossbeam 5 of the upper run 24 have L-shaped cross sections, with the outer side surfaces of the diagonal bracing members abutting against the inner side surfaces of the vertically bent portions 13. In this embodiment, the front upper crossbeam 4 and the rear upper crossbeam 5 of the upper run 24 still have L-shaped cross sections, are arranged facing away from each other, and the outer side surfaces of the diagonal bracing members abut against the outer side surfaces of the vertically bent portions 13.

[0081] Embodiment 10 of the crane provided in the present invention:

[0082] This embodiment differs from Embodiment 1 in that, in Embodiment 1, the front upper crossbeam 4 and the rear upper crossbeam 5 are arranged opposite each other, the outer side surfaces of the diagonal bracing members abut against the inner side surfaces of the vertically bent portions 13, and the transversely bent portions 12 are flush with the upper edge of the main beam 1. In this embodiment, however, the front upper crossbeam 4 and the rear upper crossbeam 5 are arranged opposite each other, with the outer side surfaces of the diagonal bracing members abutting against the outer side surfaces of the vertically bent portions 13. Because the diagonal bracing members in this embodiment do not interfere with the transversely bent portions 12 of the upper chord 24, the transversely bent portions 12 can be lower than the upper edge of the main beam 1.

[0083] Example 11 of the crane provided in the present invention:

[0084] This embodiment differs from the first embodiment in that, in the first embodiment, the front upper cross beam 4 and the rear upper cross beam 5 are arranged opposite each other, and the outer sides of the horizontal plates and vertical plates of the front upper cross beam 4 and the rear upper cross beam 5 form a track for the guide assembly of the lifting trolley. In the present embodiment, the front upper cross beam 4 and the rear upper cross beam 5 are arranged opposite each other, and the upper side surfaces of the horizontal plates of the front upper cross beam 4 and the rear upper cross beam 5 form a track for the guide assembly of the lifting trolley.

[0085] Embodiment 12 of the crane provided in the present invention:

[0086] The difference between this embodiment and embodiment 1 is that in embodiment 1, there is a gap between the top ends of two adjacent long diagonal bracing members 16 along the extension direction of the main beam of the crane, while in this embodiment, the top ends of two adjacent long diagonal bracing members 16 are connected.

[0087] Embodiment 13 of the crane provided in the present invention:

[0088] This embodiment differs from Example 1 in that, in Example 1, the main beam 1 is a single-beam structure. In this embodiment, the main beam 1 is a double-beam structure, with two spaced-apart main beams comprising two upper chords 24 and two lower chords 25. The two upper chords 24 and two lower chords 25 are assembled with end beams (not shown) via support structures 3 at both ends. The rail-mounted trolley travels along the rails provided on the main beams.

[0089] Example 14 of the crane provided in the present invention:

[0090] The difference between this embodiment and embodiment 1 is that: in embodiment 1, the crane has a single-beam structure, and the trolley runs at the bottom of the main beam; the bottom ends of the long diagonal brace 16 and the short diagonal brace 19 are both connected to the lower chord beam 24, and the top end of the short diagonal brace 19 is connected to the middle of the length direction of the long diagonal brace 16, forming an upright "human" shape. In this embodiment, the crane has a double-beam structure, including two parallel and spaced main beams, and the trolley runs above the main beams; the top ends of the long diagonal brace 16 and the short diagonal brace 19 are both connected to the upper chord beam 24, and the bottom end of the short diagonal brace 19 is connected to the middle of the length direction of the long diagonal brace 16, forming a "y" shape, that is, an inverted "human" shape. According to the force conditions of the main beam, this "y" shape is particularly suitable for scenarios where the trolley runs above the main beam.

[0091] Embodiment 1 of the main beam of the crane in the present invention:

[0092] The main beam structure of the crane in this embodiment is the same as the main beam 1 structure in the above-mentioned crane embodiment 1, and will not be repeated here.

[0093] Of course, in other embodiments, the main beam of the crane may also adopt the structure of the main beam 1 in any of the crane embodiments 2 to 14, which will not be repeated here.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made by using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A main beam of a crane, comprising an upper chord, a lower chord, and a diagonal bracing unit connected between the upper chord and the lower chord, characterized in that: The diagonal bracing unit is in the shape of a "human", and is composed of a long diagonal bracing member and a short diagonal bracing member; every two adjacent diagonal bracing units form a diagonal bracing unit group, and each diagonal bracing unit group is arranged along the extension direction of the main beam of the crane; the bottom ends of the long diagonal bracing members and the short diagonal bracing members in each diagonal bracing unit group are connected to the lower chord beam, and the top end of the short diagonal bracing member is connected to the middle part of the length direction of the long diagonal bracing member, and the two long diagonal bracing members in the two diagonal bracing units are set to a structure of narrow upper and wide lower or wide upper and narrow lower. When the two long diagonal bracing members are of a narrow upper and wide lower structure, the two short diagonal bracing members are located between the two long diagonal bracing members. When the two long diagonal bracing members are of a wide upper and narrow lower structure, the two short diagonal bracing members are located between the two long diagonal bracing members. On both sides of the member, or the top ends of the long diagonal bracing members and the short diagonal bracing members are connected to the upper chord beam, and the bottom ends of the short diagonal bracing members are connected to the middle part of the long diagonal bracing members in the length direction, the two long diagonal bracing members in the two diagonal bracing units are arranged to be narrow at the top and wide at the bottom or wide at the top and narrow at the bottom, when the two long diagonal bracing members are of the narrow at the top and wide at the bottom, the two short diagonal bracing members are located on both sides of the two long diagonal bracing members, when the two long diagonal bracing members are of the wide at the top and narrow at the bottom, the two short diagonal bracing members are located between the two long diagonal bracing members; the long diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other along the extension direction of the main beam of the crane, or the short diagonal bracing members in the same diagonal bracing unit group are arranged adjacent to each other along the extension direction of the main beam of the crane.

2. The main beam of the crane according to claim 1, characterized in that: Both the long diagonal brace and the short diagonal brace include a flat plate portion and a side portion connected to the flat plate portion, and the side portion and the flat plate portion form a C-shaped structure; the side portion of the long diagonal brace is connected to the side portion of the short diagonal brace, and the flat plate portion of the long diagonal brace is connected to the flat plate portion of the short diagonal brace.

3. The main beam of the crane according to claim 2, characterized in that: The width of the flat plate of the long diagonal bracing piece is consistent with the width of the flat plate of the short diagonal bracing piece, and the short diagonal bracing piece is provided with an avoidance stop.

4. The main beam of the crane according to claim 1, 2 or 3, characterized in that: The upper chord beam includes a front upper cross beam and a rear upper cross beam, the cross sections of the front upper cross beam and the rear upper cross beam are both L-shaped, the upper chord beam includes a transverse bending portion and a vertical bending portion, the corners of the upper chord beam form the edges of the upper chord beam, the ends of the diagonal braces are connected to the inner side surfaces of the transverse bending portions, and the outer side surfaces of the side edges of the diagonal braces are abutted against the inner side surfaces of the vertical bending portions.

5. The main beam of the crane according to claim 1, 2 or 3, characterized in that: The long diagonal bracing piece and the short diagonal bracing piece are both planar frame structures, including a frame body corresponding to the edge of the plane, and the middle of the frame body is a hollow structure.

6. The main beam of the crane according to claim 5, characterized in that: A rib plate perpendicular to the plane where the plane frame is located is provided at the edge of the opening formed by the hollow structure.

7. The main beam of the crane according to claim 5, characterized in that: The frame of the long diagonal bracing member is in a "mouth" shape, and the frame of the short diagonal bracing member is in a "U" shape. The open end of the short diagonal bracing member is connected to the middle part of the long diagonal bracing member in the length direction.

8. The main beam of the crane according to claim 1, 2 or 3, characterized in that: There is a gap between the top ends of two adjacent long diagonal bracing members along the extension direction of the main beam of the crane; and the lengths of the two long diagonal bracing members in each diagonal bracing unit group are one long and one short.

9. The main beam of the crane according to claim 1, 2 or 3, characterized in that: There is a gap between the ends of the two adjacent diagonal bracing units in the upper and lower directions, the ends corresponding to the bottom of the "human" shape, along the extension direction of the main beam of the crane.

10. A crane comprising a main beam and end beams, wherein both ends of the main beam are provided with support structures for connecting to the end beams, and the crane further comprises a lifting trolley, which is movably mounted on the main beam along the extension direction of the main beam, characterized in that: The main beam is the main beam of the crane according to any one of claims 1 to 9.

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