Tower crane climbing frame

Abstract

The present application relates to the technical field of hoisting equipment, and particularly relates to a tower crane climbing frame, which comprises four main chords, an upper cross beam, a lower cross beam and a jacking cross beam, the lower cross beam is connected with the four main chords, the upper cross beam is connected with the four main chords, at least eight lifting oil cylinders are arranged on the lower cross beam, the plurality of lifting oil cylinders are evenly distributed at four corners of the lower cross beam, one end of the lifting oil cylinder away from the lower cross beam is connected with the jacking cross beam, the jacking cross beam is arranged on a side of the lower cross beam away from the upper cross beam, a plurality of first climbing claws are detachably arranged on the lower cross beam, and a plurality of second climbing claws are detachably arranged on the jacking cross beam. The present application has the beneficial effects that: the present application can improve sufficient jacking force by adopting at least eight lifting oil cylinders, and the plurality of lifting oil cylinders are arranged close to the four main chords respectively, so that the bending stress received by the climbing frame can be reduced, and the stability of the climbing frame of the super-large tonnage tower crane in the climbing process can be improved.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, and in particular to a tower crane climbing frame. Background Technology

[0002] Tower cranes need to be raised continuously as the building height increases during construction. The climbing frame, as the lifting device of the tower crane, plays a crucial role, and its dimensions are determined by a combination of factors, including the dimensions of the standard sections and the cylinders. With the country's significant investment in infrastructure, the demand for ultra-large tonnage tower cranes is increasing in shipyards, transportation facilities, and power infrastructure construction.

[0003] The superstructure of ultra-heavy-tonnage tower cranes is extremely heavy, sometimes weighing thousands of tons. Therefore, the stability of the climbing frame during the climbing process is critical. Traditional single-cylinder, double-cylinder, three-cylinder, four-cylinder, and six-cylinder lifting systems are no longer suitable for ultra-heavy-tonnage tower cranes. In related technology, invention patent CN115784042A discloses a climbing system and tower crane for tower cranes, including a climbing frame, a lifting beam, and a lifting cylinder. The lifting cylinder is installed between the climbing frame and the lifting beam, with the cylinder positioned close to the center of the two structures. However, due to the heavy superstructure of ultra-heavy-tonnage tower cranes, the centrally located lifting cylinder results in significant bending stress on the beam of the climbing frame, making it prone to deformation and reducing the stability of the climbing frame during the climbing process.

[0004] How to solve the above-mentioned technical problems is the challenge faced by this invention. Summary of the Invention

[0005] The purpose of this invention is to provide a tower crane climbing frame that uses at least eight lifting cylinders to increase sufficient lifting force, enabling the tower crane climbing frame to climb stably. The multiple lifting cylinders are respectively set close to the four main chords, which can reduce the bending stress on the lifting beam and the lower beam, and improve the overall stability of the climbing frame structure, thereby improving the stability of the climbing frame of ultra-large tonnage tower cranes during the climbing process.

[0006] To achieve the aforementioned objectives, the present invention employs the following technical solution: a tower crane climbing frame, comprising four main chords, an upper crossbeam, a lower crossbeam, and a lifting crossbeam. The four main chords are arranged in parallel and in a rectangular array. The four corners of the lower crossbeam are connected to the bottom ends of the four main chords. The upper crossbeam is connected to the four main chords. The upper crossbeam and the lower crossbeam are arranged in parallel. At least eight lifting cylinders are provided on the lower crossbeam, and the lifting cylinders are evenly distributed on the lower crossbeam. At the four corners, multiple lifting cylinders are arranged in parallel. The ends of the multiple lifting cylinders away from the lower crossbeam are connected to the lifting crossbeam. The lifting crossbeam and the lower crossbeam are arranged in parallel, and the lifting crossbeam is located on the side of the lower crossbeam away from the upper crossbeam. Multiple first climbing claws are detachably provided on the lower crossbeam, and multiple second climbing claws are detachably provided on the lifting crossbeam. Multiple sets of first structural reinforcement mechanisms are provided between the upper crossbeam and the lower crossbeam, and multiple sets of second structural reinforcement mechanisms are provided between the four main chords.

[0007] In practical use, the invention works as follows: The second climbing claw is installed on the lifting beam and locked. The second climbing claw then descends onto the step of the standard section. The operator controls the extension and retraction of the lifting cylinder to raise the lower beam above the step of the standard section. Next, the first climbing claw is installed and locked onto the lower beam. The operator then controls the retraction of the lifting cylinder, causing the first climbing claw to slowly descend onto the step of the standard section, checking that it is locked and preventing it from falling off. Afterward, the operator retracts the second climbing claw, controls the retraction of the lifting cylinder to raise the lifting beam, moving it above the step of the standard section. The operator then locks the second climbing claw onto the lifting beam again. Finally, the operator controls the extension of the lifting cylinder, slowly lowering the second climbing claw from the lifting beam onto the footplate of the standard section, checking that it is locked and preventing it from falling off. This process constitutes one lifting cycle. Repeating these actions achieves the lifting of the climbing frame.

[0008] By employing at least eight lifting cylinders, sufficient jacking force can be increased, enabling the tower crane climbing frame to climb stably. The multiple lifting cylinders are positioned close to the four main chords, which reduces the bending stress on the lifting beam and lower beam, thus improving the overall structural stability of the climbing frame. The first and second structural reinforcement mechanisms further enhance the overall structural strength of the climbing frame, thereby improving the stability of the climbing frame of the ultra-large tonnage tower crane during the climbing process.

[0009] Furthermore, the lower crossbeam includes four L-shaped beams and four connecting crossbeams, the L-shaped beams and the connecting crossbeams being connected in an alternating manner, the four L-shaped beams being fixed to the bottom ends of the four main chords respectively, a first flange connection mechanism being provided between the L-shaped beams and the connecting crossbeams, the L-shaped beams and the connecting crossbeams being detachably installed through the first flange connection mechanism, a plurality of first climbing claws being detachably mounted on the four L-shaped beams respectively, and a plurality of lifting cylinders being detachably mounted on the four L-shaped beams respectively.

[0010] By adopting the above technical solution, and considering the large overall structure of the lower crossbeam, the use of a splicing mechanism helps to reduce the difficulty of processing.

[0011] Furthermore, the first flange connection mechanism includes a first connecting flange, a second connecting flange, and a plurality of connecting bolts. The first connecting flange is provided at both ends of the L-shaped beam, and the second connecting flange is provided at both ends of the connecting beam. The first connecting flange and the second connecting flange are fitted together, and the plurality of connecting bolts are threadedly connected to the mating first connecting flange and the second connecting flange.

[0012] By adopting the above technical solution, the connection method using the first flange connection mechanism is simple to operate and can ensure sufficient connection strength between the L-shaped beam and the connecting beam.

[0013] Furthermore, the L-shaped beam is provided with multiple cylinder mounting holes and multiple first mounting holes. The multiple lifting cylinders are detachably mounted at the multiple cylinder mounting holes, and the multiple first climbing claws are detachably mounted at the multiple first mounting holes.

[0014] By adopting the above technical solution, the opening of the cylinder mounting hole and the first mounting hole facilitates the installation of the lifting cylinder and the first climbing claw.

[0015] Furthermore, the lifting beam includes two U-shaped frames and two adjusting beams, the U-shaped frames and the adjusting beams are connected end to end in an alternating manner, a second flange connection mechanism is provided between the U-shaped frames and the adjusting beams, the U-shaped frames and the adjusting beams are detachably installed through the second flange connection mechanism, multiple lifting cylinders are respectively connected to the two U-shaped frames, and multiple second climbing claws are respectively detachably installed on the two U-shaped frames.

[0016] By adopting the above technical solution, since the overall structure of the lifting beam is relatively large, the splicing mechanism of the lifting beam helps to reduce the processing difficulty.

[0017] Furthermore, the U-shaped frame is provided with multiple cylinder connecting seats, and the multiple lifting cylinders are respectively connected to the multiple cylinder connecting seats. The U-shaped frame is provided with multiple second mounting holes, and the multiple second climbing claws are respectively slidably disposed in the multiple second mounting holes. The U-shaped frame is provided with a climbing claw mounting drag near the second mounting hole, and the climbing claw mounting drag is provided with a locking hole. A locking pin is detachably disposed in the locking hole.

[0018] By adopting the above technical solution, the hydraulic cylinder connecting seat facilitates the installation of the lifting hydraulic cylinder. The climbing claw mounting tow facilitates the installation of the second climbing claw.

[0019] Furthermore, the upper crossbeam includes four sets of spliced ​​crossbeams. The two ends of any one of the spliced ​​crossbeams are respectively connected to two adjacent main chords. A set of spliced ​​crossbeams is provided between each of the two adjacent main chords. The spliced ​​crossbeams include two first spliced ​​beams and two second spliced ​​beams. The two first spliced ​​beams are respectively connected to the two ends of the second spliced ​​beams. The two first spliced ​​beams are respectively connected to two adjacent main chords. A third flange connection mechanism is provided between the first spliced ​​beams and the second spliced ​​beams. The first spliced ​​beams and the second spliced ​​beams can be detachably installed through the third flange connection mechanism.

[0020] By adopting the above technical solution, the splicing structure of the upper crossbeam reduces the difficulty of production.

[0021] Furthermore, the first structural reinforcement mechanism includes a column, a first inclined column, and a second inclined column. The column is vertically arranged, and its two ends are respectively connected to the upper crossbeam and the lower crossbeam. The two ends of the first inclined column are respectively connected to the upper crossbeam and the lower crossbeam, and the two ends of the second inclined column are respectively connected to the upper crossbeam and the lower crossbeam. The first inclined column and the second inclined column are respectively inclined to the column, and the first inclined column and the second inclined column are symmetrically distributed on both sides of the column.

[0022] By adopting the above technical solution, the first structural reinforcement mechanism improves the overall structural strength of the climbing frame.

[0023] Furthermore, the second structural reinforcement mechanism includes a first horizontal web member, a first oblique web member, a second oblique web member, a second horizontal web member, a third oblique web member, and a fourth oblique web member. The two ends of the first horizontal web member are respectively connected to two adjacent main chord members. The two ends of the first oblique web member are respectively connected to the main chord member and the upper crossbeam. The end of the first oblique web member closest to the main chord member is located near the end of the first horizontal web member. The two ends of the second oblique web member are respectively connected to the main chord member and the upper crossbeam. The first oblique web member and the second oblique web member are symmetrically distributed at both ends of the first horizontal web member. The end of the first oblique web member away from the first horizontal web member is inclined towards the second oblique web member.

[0024] The two ends of the second horizontal web member are respectively connected to the two adjacent main chord members. The two ends of the third diagonal web member are respectively connected to the main chord member and the first horizontal web member. The end of the third diagonal web member closer to the main chord member is located near the end of the second horizontal web member. The two ends of the fourth diagonal web member are respectively connected to the main chord member and the first horizontal web member. The third diagonal web member and the fourth diagonal web member are symmetrically distributed at both ends of the second horizontal web member. The end of the third diagonal web member away from the second horizontal web member is inclined towards the fourth diagonal web member.

[0025] By adopting the above technical solution, the second structural reinforcement mechanism further improves the overall stability of the climbing frame.

[0026] Furthermore, the lifting beam is equipped with multiple sets of guide wheels.

[0027] By adopting the above technical solution, the guide wheel guides the climbing of the lifting beam, which can improve the stability of the lifting beam during the climbing process.

[0028] By adopting the above technical solution, the climbing frame can climb stably on the standard section.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. This invention can improve the lifting force during the climbing process by setting at least eight lifting cylinders, and can be applied to the climbing work of the climbing frame of ultra-large tonnage tower cranes;

[0031] 2. By setting multiple lifting cylinders close to the four main chords, this invention can reduce the bending stress on the lifting beam and the lower beam, which is beneficial to improving the overall stability of the climbing frame and also to improving the stability of the climbing frame during the climbing process.

[0032] 3. By setting up multiple sets of first and second structural reinforcement mechanisms, the present invention is beneficial to improving the overall stability of the climbing frame and the stability of the climbing frame during the climbing process. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0034] Figure 1 This is a schematic diagram of the structure of a tower crane climbing frame according to an embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram of the structure of a tower crane climbing frame according to an embodiment of the present invention.

[0036] Figure 3 This is a schematic diagram of the lower crossbeam in an embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram of the lifting beam structure according to an embodiment of the present invention.

[0038] Figure 5 This is a partial enlarged view of the lifting beam structure according to an embodiment of the present invention.

[0039] Figure 6 This is a schematic diagram of the upper crossbeam in an embodiment of the present invention.

[0040] The attached diagram is labeled as follows: 1. Main chord; 2. Upper crossbeam; 21. Splicing crossbeam; 211. First splicing beam; 212. Second splicing beam; 3. Lower crossbeam; 31. L-shaped beam; 32. Connecting crossbeam; 4. Lifting crossbeam; 41. U-shaped frame; 42. Adjusting crossbeam; 5. Lifting cylinder; 6. First climbing claw; 7. Second climbing claw; 8. First structural reinforcement mechanism; 81. Column; 82. First inclined column; 83. Second inclined column; 9. Second structural reinforcement mechanism; 91. First horizontal web member; 92. First inclined... 93. Second diagonal web member; 94. Second transverse web member; 95. Third diagonal web member; 96. Fourth diagonal web member; 10. First flange connection mechanism; 101. First connecting flange; 102. Second connecting flange; 103. Connecting bolt; 11. Cylinder mounting hole; 12. First mounting hole; 13. Second flange connection mechanism; 14. Cylinder connecting seat; 15. Second mounting hole; 16. Climbing claw mounting bracket; 17. Locking hole; 18. Locking pin; 19. Guide wheel; 20. Third flange connection mechanism. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] Example:

[0043] See Figure 1 and Figure 2 This embodiment provides a technical solution for a tower crane climbing frame, comprising four main chords 1, an upper crossbeam 2, a lower crossbeam 3, and a lifting crossbeam 4. The four main chords 1 are arranged in parallel and in a rectangular array. The four corners of the lower crossbeam 3 are connected to the bottom ends of the four main chords 1, respectively. The upper crossbeam 2 is connected to the four main chords 1, and the upper crossbeam 2 and the lower crossbeam 3 are arranged in parallel. At least eight lifting cylinders 5 are provided on the lower crossbeam 3, and the multiple lifting cylinders 5 are evenly distributed on the four sides of the lower crossbeam 3. At the corner, multiple lifting cylinders 5 are arranged in parallel. The end of the multiple lifting cylinders 5 away from the lower crossbeam 3 is connected to the lifting crossbeam 4. The lifting crossbeam 4 and the lower crossbeam 3 are arranged in parallel, and the lifting crossbeam 4 is located on the side of the lower crossbeam 3 away from the upper crossbeam 2. Multiple first climbing claws 6 are detachably installed on the lower crossbeam 3, and multiple second climbing claws 7 are detachably installed on the lifting crossbeam 4. Multiple sets of first structural reinforcement mechanisms 8 are arranged between the upper crossbeam 2 and the lower crossbeam 3, and multiple sets of second structural reinforcement mechanisms 9 are arranged between the four main chords 1.

[0044] In this embodiment, there are eight lifting cylinders 5. Two lifting cylinders 5 are provided at each corner of the lower crossbeam 3. The eight lifting cylinders 5 are combined to form an eight-cylinder lifting system, which can provide a large lifting force and is suitable for the climbing work of the climbing frame of ultra-large tonnage tower cranes.

[0045] It should be added that, in this embodiment, the upper crossbeam 2 is fixed to one-third of the height of the four main chords 1 by welding, and the lower crossbeam 3 is fixed to the bottom of the four main chords 1 by welding.

[0046] Specifically, when the climbing frame is climbing, the operator installs the second climbing claw 7 on the lifting beam 4 and locks it. The second climbing claw 7 then falls onto the step of the standard section. The operator then controls the lifting cylinder 5 to extend and retract, lifting the lower beam 3 above the step of the standard section. After that, the operator installs and locks the first climbing claw 6 on the lower beam 3. Then, the operator controls the lifting cylinder 5 to retract, causing the first climbing claw 6 to slowly fall onto the step of the standard section to check whether the first climbing claw 6 is locked and to prevent it from falling off. Afterwards, the workers retract the second climbing claw 7, control the lifting cylinder 5 to retract, and drive the lifting beam 4 to rise, so that the lifting beam 4 moves above the standard section step. Then, the workers lock the second climbing claw 7 onto the lifting beam 4 again. Then, the workers control the lifting cylinder 5 to extend, and slowly lower the second climbing claw 7 on the lifting beam 4 onto the standard section step to check whether the second climbing claw 7 is locked and to prevent it from falling off. The above process is one lifting cycle. Repeating the above actions can achieve the lifting of the climbing frame.

[0047] Understandably, since the eight lifting cylinders 5 are evenly distributed at the four corners of the lower crossbeam 3, the bending stress on the lifting crossbeam 4 and the lower crossbeam 3 can be reduced, which helps to improve the stability of the climbing frame structure.

[0048] Reference Figure 2 and Figure 3 The lower crossbeam 3 includes four L-shaped beams 31 and four connecting crossbeams 32. The L-shaped beams 31 and the connecting crossbeams 32 are connected in an alternating manner, and the four L-shaped beams 31 and the four connecting crossbeams 32 are spliced ​​to form a rectangular frame structure. The four L-shaped beams 31 are fixedly connected to the bottom ends of the four main chord members 1 by welding. A first flange connection mechanism 10 is provided between the L-shaped beams 31 and the connecting crossbeams 32, and the L-shaped beams 31 and the connecting crossbeams 32 can be detachably installed through the first flange connection mechanism 10.

[0049] The first flange connection mechanism 10 includes a first connecting flange 101, a second connecting flange 102, and multiple connecting bolts 103. The first connecting flange 101 can be fixed to the end of the L-shaped beam 31 by welding, and both ends of the L-shaped beam 31 are welded with the first connecting flange 101. The second connecting flange 102 can be fixed to the end of the connecting beam 32 by welding, and both ends of the connecting beam 32 are welded with the second connecting flange 102. The first connecting flange 101 and the second connecting flange 102 are configured to mate with each other. The multiple connecting bolts 103 can be threaded onto the mating first connecting flange 101 and the second connecting flange 102. This method enables detachable installation between the L-shaped beam 31 and the connecting beam 32. The connection method using the first connecting flange 101 and the second connecting flange 102 provides a high safety factor.

[0050] Understandably, since this embodiment is applicable to tower cranes with ultra-large tonnage, the lower crossbeam 3 has a large volume. The spliced ​​structure of the lower crossbeam 3 helps reduce the production difficulty of the lower crossbeam 3 and also facilitates transportation. Due to the spliced ​​design of the L-shaped beam 31 and the connecting crossbeam 32, the length and width of the lower crossbeam 3 can be adjusted by replacing the connecting crossbeam 32 of different lengths, making the operation flexible.

[0051] Reference Figure 2 and Figure 3 Each of the two perpendicular vertical outer surfaces of the L-shaped beam 31 has a cylinder mounting hole 11, located near the corner of the L-shaped beam 31. The cylinder mounting holes 11 facilitate the installation of the lifting cylinder 5, which can be mounted at the cylinder mounting hole 11 using a pin. Each of the two perpendicular vertical outer surfaces of the L-shaped beam 31 also has a first mounting hole 12, where the first climbing claw 6 can be mounted using a pin connection or bolt connection. In this embodiment, there are eight first climbing claws 6, with two first climbing claws 6 located at each of the four positions of the lower crossbeam 3, thereby improving the stability of the climbing frame during the climbing process.

[0052] Reference Figure 4 and Figure 5 The lifting beam 4 includes two U-shaped frames 41 and two adjusting beams 42. The U-shaped frames 41 and adjusting beams 42 are connected end-to-end in an alternating manner. A second flange connection mechanism 13 is provided between the U-shaped frames 41 and the adjusting beams 42, allowing for detachable installation and removal of the U-shaped frames 41 and adjusting beams 42 via the second flange connection mechanism 13. In this embodiment, the structure and connection method of the second flange connection mechanism 13 are the same as those of the first flange connection mechanism 10, and the specific structure of the second flange connection mechanism 13 will not be described in detail here.

[0053] Four hydraulic cylinder connecting seats 14 are fixed to the top of the U-shaped frame 41 near its corners by welding. The hydraulic cylinder connecting seats 14 are used to connect with the lifting hydraulic cylinder 5. In this embodiment, the hydraulic cylinder connecting seat 14 can be a bearing seat, and the piston end of the lifting hydraulic cylinder 5 can be detachably installed on the bearing seat by bolts or pins. It should be noted that the hydraulic cylinder seat can also be an ear plate structure, and the piston end of the lifting hydraulic cylinder 5 can be connected to the ear plate by pins.

[0054] Reference Figure 4 and Figure 5Four second mounting holes 15 are provided on the three vertical outer surfaces of the U-shaped frame 41. The arrangement of the eight second mounting holes 15 on the lifting beam 4 is the same as the arrangement of the eight first mounting holes 12 on the lower beam 3. The second climbing claw 7 can be slidably installed in the second mounting holes 15. A climbing claw mounting bracket 16 can be fixed to the U-shaped frame 41 near the second mounting holes 15 by welding. The climbing claw mounting bracket 16 has multiple locking holes 17, and locking pins 18 can be detachably installed in the locking holes 17. When it is necessary to lock the second climbing claw 7, the second climbing claw 7 is placed on the climbing claw mounting bracket 16, and the locking pins 18 are inserted into the locking holes 17 and the second climbing claw 7 to lock the second climbing claw 7. The operation is simple.

[0055] It should be added that, in this embodiment, both the first climbing claw 6 and the second climbing claw 7 are square steel. Square steel has high structural strength, which is beneficial to improving the stability of the climbing frame during the climbing process.

[0056] Reference Figure 4 and Figure 5 Each of the two corners of the U-shaped frame 41 is provided with a guide wheel 19, and the guide wheels 19 are oriented towards the standard section. When the climbing frame climbs on the standard section, the four guide wheels 19 of the lifting beam 4 abut against the four positions of the standard section respectively. The guide wheels 19 have a guiding effect on the climbing frame's climbing, improving the stability of the climbing frame during the lifting process.

[0057] Reference Figure 2 and Figure 6 The upper crossbeam 2 is a square frame structure, comprising four sets of spliced ​​crossbeams 21. Each spliced ​​crossbeam 21 is fixed at both ends to two adjacent main chord members 1 by welding. A set of spliced ​​crossbeams 21 is provided between each pair of adjacent main chord members 1. The upper crossbeam 2 is located at one-third of the height of the main chord member 1. Each spliced ​​crossbeam 21 includes two first spliced ​​beams 211 and a second spliced ​​beam 212. The two first spliced ​​beams 211 are connected to both ends of the second spliced ​​beam 212, and are welded to two adjacent main chord members 1. A third flange connection mechanism 20 is provided between the first spliced ​​beams 211 and the second spliced ​​beams 212, allowing for detachable installation between them. In this embodiment, the third flange connection mechanism 20 and the first flange connection mechanism 10 have the same structure and connection method; therefore, the specific structure of the third flange connection mechanism 20 will not be described in detail here.

[0058] Reference Figure 1 and Figure 2In this example, the first structural reinforcement mechanism 8 is provided in eight sets, which are distributed in four directions: front, back, left, and right of the upper crossbeam 2. That is, each direction of the upper crossbeam 2 is provided with two sets of the first structural reinforcement mechanism 8, and the first structural reinforcement mechanisms 8 on the same side are arranged close to each other. The first structural reinforcement mechanism 8 includes a column 81, a first inclined column 82, and a second inclined column 83. The column 81 is vertically arranged, and its two ends are connected to the upper crossbeam 2 and the lower crossbeam 3, respectively. The column 81 can be connected to the upper crossbeam 2 and the lower crossbeam 3 by welding or hinge. The two ends of the first inclined column 82 are hinged to the upper crossbeam 2 and the lower crossbeam 3, respectively. The two ends of the second inclined column 83 are hinged to the upper crossbeam 2 and the lower crossbeam 3, respectively. The first inclined column 82 and the second inclined column 83 are inclined to the column 81, and the first inclined column 82 and the second inclined column 83 are symmetrically distributed on both sides of the column 81. In this embodiment, the inclination range of the first inclined column 82 and the upright column 81 is 15° to 40°.

[0059] It is understandable that the combination of the first inclined column 82, the second inclined column 83, and the upper crossbeam 2 forms an inverted triangular structure. The triangular structure has a strong stability effect, which is conducive to improving the overall structural strength of the climbing frame.

[0060] Reference Figure 1 and Figure 2 The second structural reinforcement mechanism 9 is provided in four sets, which are located at the front, back, left, and right positions of the upper crossbeam 2. The second structural reinforcement mechanism 9 includes a first horizontal web member 91, a first diagonal web member 92, a second diagonal web member 93, a second horizontal web member 94, a third diagonal web member 95, and a fourth diagonal web member 96. The first horizontal web member 91 is horizontally arranged, and its two ends are hinged to two adjacent main chord members 1. The first horizontal web member 91 is located at two-thirds of the height of the main chord member 1. The first diagonal web member 92 is hinged to the main chord 1 and the upper crossbeam 2 at both ends, with the end of the first diagonal web member 92 closer to the main chord 1 and the end of the first diagonal web member 91 located near the main chord 1. The second diagonal web member 93 is hinged to the main chord 1 and the upper crossbeam 2 at both ends, and the first diagonal web member 92 and the second diagonal web member 93 are symmetrically distributed at both ends of the first diagonal web member 91. The end of the first diagonal web member 92 away from the first diagonal web member 91 is inclined towards the second diagonal web member 93. The first diagonal web member 91, the first diagonal web member 92, and the second diagonal web member 93, when spliced ​​together, form an inverted triangular structure, further improving the structural strength of the climbing frame.

[0061] The second horizontal web member 94 is horizontally positioned, with both ends hinged to the two adjacent main chord members 1. The second horizontal web member 94 is positioned near the top of the main chord member 1. The third diagonal web member 95 is hinged to both the main chord member 1 and the first horizontal web member 91, with the end of the third diagonal web member 95 near the main chord member 1 and close to the end of the second horizontal web member 94. The fourth diagonal web member 96 is hinged to both the main chord member 1 and the first horizontal web member 91. The third diagonal web member 95 and the fourth diagonal web member 96 are symmetrically distributed at both ends of the second horizontal web member 94, with the end of the third diagonal web member 95 away from the second horizontal web member 94 inclined towards the fourth diagonal web member 96. The second horizontal web member 94, the third diagonal web member 95, and the fourth diagonal web member 96, when joined together, form an inverted triangular structure, further improving the structural strength of the climbing frame.

[0062] The implementation principle of a tower crane climbing frame in this embodiment is as follows: When the climbing frame is climbing, the operator installs the second climbing claw 7 on the lifting beam 4 and locks the second climbing claw 7. The second climbing claw 7 falls onto the step of the standard section. Then, the operator controls the lifting cylinder 5 to extend and retract, lifting the lower beam 3 above the step of the standard section. Then, the operator installs and locks the first climbing claw 6 on the lower beam 3. Then, the operator controls the lifting cylinder 5 to retract, so that the first climbing claw 6 slowly falls onto the step of the standard section to check whether the first climbing claw 6 is locked and to prevent it from falling off. Afterwards, the workers retract the second climbing claw 7, control the lifting cylinder 5 to retract, and drive the lifting beam 4 to rise, so that the lifting beam 4 moves above the standard section step. Then, the workers lock the second climbing claw 7 onto the lifting beam 4 again. Then, the workers control the lifting cylinder 5 to extend, and slowly lower the second climbing claw 7 on the lifting beam 4 onto the standard section step to check whether the second climbing claw 7 is locked and to prevent it from falling off. The above process is one lifting cycle. Repeating the above actions can achieve the lifting of the climbing frame.

[0063] The eight lifting cylinders 5, when combined, form an eight-cylinder lifting system, which can provide a large lifting force and is suitable for the climbing work of the climbing frame of ultra-large tonnage tower cranes. Since the eight lifting cylinders 5 are evenly distributed at the four corners of the lower crossbeam 3, the bending stress on the lifting crossbeam 4 and the lower crossbeam 3 can be reduced, which helps to improve the stability of the climbing frame structure.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tower crane climbing frame, characterized in that, The system includes four main chords (1), an upper crossbeam (2), a lower crossbeam (3), and a lifting crossbeam (4). The four main chords (1) are arranged in parallel and form a rectangular array. The four corners of the lower crossbeam (3) are connected to the bottom ends of the four main chords (1). The upper crossbeam (2) is connected to the four main chords (1). The upper crossbeam (2) and the lower crossbeam (3) are arranged in parallel. At least eight lifting cylinders (5) are provided on the lower crossbeam (3). The lifting cylinders (5) are evenly distributed at the four corners of the lower crossbeam (3) and are arranged in parallel. The lifting cylinders (5) are connected to the lifting beam (4) at one end away from the lower crossbeam (3). The lifting beam (4) and the lower crossbeam (3) are arranged in parallel, and the lifting beam (4) is located on the side of the lower crossbeam (3) away from the upper crossbeam (2). The lower crossbeam (3) is detachably provided with multiple first climbing claws (6), and the lifting beam (4) is detachably provided with multiple second climbing claws (7). Multiple sets of first structural reinforcement mechanisms (8) are provided between the upper crossbeam (2) and the lower crossbeam (3), and multiple sets of second structural reinforcement mechanisms (9) are provided between the four main chords (1). The lower crossbeam (3) includes four L-shaped beams (31) and four connecting crossbeams (32). The L-shaped beams (31) and the connecting crossbeams (32) are connected in an alternating manner. The four L-shaped beams (31) are respectively fixed to the bottom ends of the four main chords (1). A first flange connection mechanism (10) is provided between the L-shaped beams (31) and the connecting crossbeams (32). The L-shaped beams (31) and the connecting crossbeams (32) are detachably installed through the first flange connection mechanism (10). Multiple first climbing claws (6) are detachably installed on the four L-shaped beams (31). Multiple lifting cylinders (5) are detachably installed on the four L-shaped beams (31). The lifting beam (4) includes two U-shaped frames (41) and two adjusting beams (42). The U-shaped frames (41) and the adjusting beams (42) are connected end to end in a staggered manner. The U-shaped frames (41) are provided with multiple cylinder connecting seats (14). Multiple lifting cylinders (5) are respectively connected to multiple cylinder connecting seats (14). Multiple second mounting holes (15) are opened on the U-shaped frames (41). Multiple second climbing claws (7) are respectively slidably arranged in multiple second mounting holes (15). Climbing claw mounting drags (16) are provided near the second mounting holes (15) on the U-shaped frames (41). Locking holes (17) are opened on the climbing claw mounting drags (16). Locking pins (18) are detachably arranged in the locking holes (17).

2. The climbing frame of claim 1, wherein, The first flange connection mechanism (10) includes a first connecting flange (101), a second connecting flange (102), and a plurality of connecting bolts (103). The first connecting flange (101) is provided at both ends of the L-shaped beam (31), and the second connecting flange (102) is provided at both ends of the connecting beam (32). The first connecting flange (101) and the second connecting flange (102) are fitted together. The plurality of connecting bolts (103) are threadedly connected to the mating first connecting flange (101) and the second connecting flange (102).

3. The climbing frame of claim 2, wherein, The L-shaped beam (31) is provided with multiple cylinder mounting holes (11) and multiple first mounting holes (12). Multiple lifting cylinders (5) are detachably mounted at the multiple cylinder mounting holes (11), and multiple first climbing claws (6) are detachably mounted at the multiple first mounting holes (12).

4. The climbing frame of claim 1, wherein, A second flange connection mechanism (13) is provided between the U-shaped frame (41) and the adjusting beam (42). The U-shaped frame (41) and the adjusting beam (42) are detachably installed through the second flange connection mechanism (13). Multiple lifting cylinders (5) are respectively connected to two U-shaped frames (41). Multiple second climbing claws (7) are respectively detachably installed on two U-shaped frames (41). Multiple sets of guide wheels (19) are provided on the lifting beam (4).

5. The climbing frame of claim 1, wherein, The upper crossbeam (2) includes four sets of splicing crossbeams (21). The two ends of any splicing crossbeam (21) are respectively connected to two adjacent main chords (1). A set of splicing crossbeams (21) is provided between each of the two adjacent main chords (1). The splicing crossbeam (21) includes two first splicing beams (211) and a second splicing beam (212). The two first splicing beams (211) are respectively connected to the two ends of the second splicing beam (212). The two first splicing beams (211) are respectively connected to two adjacent main chords (1). A third flange connection mechanism (20) is provided between the first splicing beams (211) and the second splicing beams (212). The first splicing beams (211) and the second splicing beams (212) can be detachably installed through the third flange connection mechanism (20).

6. The climbing frame of claim 1, wherein, The first structural reinforcement mechanism (8) includes a column (81), a first inclined column (82), and a second inclined column (83). The column (81) is vertically arranged, and its two ends are connected to the upper crossbeam (2) and the lower crossbeam (3), respectively. The two ends of the first inclined column (82) are connected to the upper crossbeam (2) and the lower crossbeam (3), respectively. The two ends of the second inclined column (83) are connected to the upper crossbeam (2) and the lower crossbeam (3), respectively. The first inclined column (82) and the second inclined column (83) are inclined to the column (81), respectively. The first inclined column (82) and the second inclined column (83) are symmetrically distributed on both sides of the column (81).

7. The climbing frame of claim 1, wherein, The second structural reinforcement mechanism (9) includes a first horizontal web member (91), a first oblique web member (92), a second oblique web member (93), a second horizontal web member (94), a third oblique web member (95), and a fourth oblique web member (96). The two ends of the first horizontal web member (91) are respectively connected to the two adjacent main chord members (1). The two ends of the first oblique web member (92) are respectively connected to the main chord member (1) and the upper crossbeam (2). The end of the first oblique web member (92) close to the main chord member (1) is located close to the end of the first horizontal web member (91). The two ends of the second oblique web member (93) are respectively connected to the main chord member (1) and the upper crossbeam (2). The first oblique web member (92) and the second oblique web member (93) are symmetrically distributed at both ends of the first horizontal web member (91). The end of the first oblique web member (92) away from the first horizontal web member (91) is inclined toward the second oblique web member (93). The two ends of the second horizontal web member (94) are respectively connected to the two adjacent main chord members (1). The two ends of the third oblique web member (95) are respectively connected to the main chord member (1) and the first horizontal web member (91). The end of the third oblique web member (95) near the main chord member (1) is located near the end of the second horizontal web member (94). The two ends of the fourth oblique web member (96) are respectively connected to the main chord member (1) and the first horizontal web member (91). The third oblique web member (95) and the fourth oblique web member (96) are symmetrically distributed at both ends of the second horizontal web member (94). The end of the third oblique web member (95) away from the second horizontal web member (94) is inclined toward the fourth oblique web member (96).

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