A jacking system and a tower crane dismantling method

Abstract

This invention belongs to the field of building construction technology, specifically a jacking system and tower crane dismantling method. Addressing the problems of difficult handling and time-consuming and labor-intensive installation and dismantling of standard sections in existing technologies, the following solution is proposed: a tower crane body and a jacking beam slidably fitted onto the outer wall of the tower crane body. The tower crane body is formed by stacking multiple standard sections. Multiple three-bar supports are fixedly connected within each standard section. A connecting structure is installed within the standard section to fix adjacent standard sections. In this invention, the cooperation of the sliding beam, guide groove, and top block not only facilitates the handling of standard sections and the docking of adjacent standard sections, but also limits the movement of the standard sections and the jacking beam, preventing the jacking beam from swaying during sliding. Furthermore, the U-shaped buckle frame allows for easy movement of the standard sections, enabling handling without excessive manual labor.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a jacking system and a method for dismantling tower cranes. Background Technology

[0002] The dismantling of large tower cranes on the top of super high-rise buildings is relatively simple and has a short construction period. The dismantling method is generally as follows: after the construction of the building structure is completed, a suitable flat location is found on the top, and a small tower crane and a roof crane that can be dismantled by itself are directly placed. The cranes are dismantled in order from large to small without any replacement or auxiliary measures. When dismantling the tower crane, it is necessary to dismantle the standard sections, wire ropes, counterweight of the balance arm, boom, luffing wire rope, boom and trolley, counterweight of the balance arm, hydraulic system, lifting frame, platform and guardrail, etc.

[0003] However, the existing technology still has the following shortcomings in the process of disassembling and installing standard sections:

[0004] 1. In the existing technology, during the disassembly and installation of standard sections, it is often necessary to use a cylinder to extend the standard section to a certain height, and then manually move the standard section to the top of the standard section below, and then connect two adjacent standard sections. Since the standard sections are heavy, multiple people are needed to cooperate when moving and connecting them. In addition, as the number of standard sections increases, the staff need to move the standard sections at high places, which can easily cause engineering accidents.

[0005] 2. Because the standard sections are heavy, workers need to make fine adjustments when aligning two adjacent standard sections to avoid deviations that could cause the two standard sections to become loose. Therefore, installation and disassembly are time-consuming and labor-intensive.

[0006] To address the above problems, this invention proposes a jacking system and a tower crane dismantling method. Summary of the Invention

[0007] This invention provides a top extension system and a tower crane dismantling method, which solves the shortcomings of existing technologies, such as the difficulty in transporting standard sections and the time-consuming and labor-intensive installation and dismantling of standard sections.

[0008] This invention provides the following technical solution:

[0009] A jacking system includes: a tower crane body and a jacking beam slidably sleeved on the outer wall of the tower crane body. The tower crane body is formed by stacking multiple standard sections, and multiple three-bar supports are fixedly connected inside each standard section.

[0010] The connecting structure, located within the standard section, is used to fix two adjacent standard sections together.

[0011] Multiple sets of jacking structures are installed inside the jacking beam to allow the jacking beam to slide up and down on the outer wall of the tower crane body;

[0012] The movable structure, located within the lifting beam, is used to smoothly and easily remove the upper standard section from the top of the lower standard section.

[0013] In one possible design, the connection structure includes upper connecting grooves respectively located at the four top corners of the standard section, and lower connecting grooves located at the four bottom corners of the standard section. The bottom inner wall of the lower connecting groove is provided with multiple bolts, and the bottom ends of the bolts extend into the upper connecting grooves of adjacent standard sections. The multiple bolts can fix two adjacent standard sections, which is not only convenient for installation but also for disassembly. Furthermore, since the bolts are located in the lower and upper connecting grooves, they can be prevented from being corroded by rainwater and developing rust.

[0014] In one possible design, the jacking structure includes a first base and a second base fixedly connected to the inner wall of one side of the jacking beam. A first jacking cylinder is rotatably connected to the first base, and a second jacking cylinder is rotatably connected to the second base. The output shafts of both the first and second jacking cylinders are rotatably connected to climbing claws, which slide in engagement with a standard section. A plurality of steps that engage with the climbing claws are fixedly connected to one side of the standard section. By alternating the use of the first and second jacking cylinders, the jacking beam can be jacked up and down on the outer wall of the tower crane body, facilitating the installation and disassembly of the standard section.

[0015] In one possible design, the moving structure includes multiple sliding beams fixedly connected within the lifting beam, with the sliding beams evenly distributed on both sides of the standard section. Each standard section has multiple guide grooves on its opposite side, which slide in conjunction with the sliding beams. The sliding beams near the standard section have two clearance grooves. When the standard section is moved out of the lifting beam, the sliding beams slide in conjunction with the guide grooves, allowing the standard section to move smoothly out of the lifting beam along the trajectory of the sliding beams. Conversely, it can easily move the standard section into the lifting beam, facilitating the docking of adjacent standard sections. Similarly, when the lifting beam moves up and down, the beams at the four corners of the standard section extend into the clearance grooves, facilitating the sliding of the lifting beam on the tower crane body.

[0016] In one possible design, the climbing claw includes a fixed block slidably connected to one side of the standard section. The inner wall of the fixed block away from the standard section has a sliding groove. A metal wedge block that engages with the step is slidably connected in the sliding groove. A spring is fixedly connected to the side of the metal wedge block away from the standard section, and the end of the spring away from the metal wedge block is fixedly connected to the inner wall of the sliding groove. Multiple electromagnets are fixedly connected to the inner wall of the sliding groove away from the standard section. The attraction of the metal wedge block by the electromagnets can release the support connection between the metal wedge block and the step, facilitating the up-and-down movement of the fixed block. Thus, during the alternating use of the first and second lifting cylinders, the climbing claw can alternately engage with the step, thereby enabling the lifting beam to rise and fall, facilitating the installation and disassembly of the standard section.

[0017] In one possible design, a top block that slidably connects to the guide groove is located within the clearance groove. A first screw is threadedly connected to the sliding crossbeam, with one end of the first screw extending into the clearance groove and rotatably connected to the top block. When the standard section needs to be moved out of the lifting crossbeam, the first screw is rotated to extend the top block into the guide groove. The cooperation between the sliding crossbeam, the top block, and the guide groove facilitates the standard section's movement along the trajectory of the sliding crossbeam. Similarly, the top block extending into the guide groove allows the lifting crossbeam to engage with the standard section, increasing the stability between the lifting crossbeam and the standard section. Furthermore, when the lifting crossbeam is raised or lowered, the top block is moved out of the guide groove, allowing the four beams of the standard section to pass through the clearance groove, thus facilitating the raising and lowering of the lifting crossbeam.

[0018] In one possible design, two triangular plates are fixedly connected to the bottom of the fixing block, and two T-shaped blocks are fixedly connected to the side of the fixing block near the standard section. The T-shaped blocks are fixedly connected to the triangular plates. Multiple T-shaped grooves are provided on one side of the standard section, and the T-shaped blocks slide in conjunction with the T-shaped grooves. The T-shaped blocks and T-shaped grooves can increase the stability of sliding between the fixing block and the standard section. Similarly, the triangular plates can provide support for the fixing block.

[0019] In one possible design, a top seat is fixedly connected to the top of the lifting beam, a placement platform is fixedly connected inside the lifting beam, and the tower crane body passes through the placement platform. Multiple support rods are fixedly connected to one side of the lifting beam, and the top of the support rods is fixedly connected to the bottom of the placement platform.

[0020] In one possible design, a cylinder is fixedly inserted through the lifting beam. The output shaft of the cylinder is fixedly connected to a U-shaped clamping bracket, which is in contact with the two beams of the standard section. Multiple pads are fixedly connected to the top and bottom of the U-shaped clamping bracket, and these pads contact the three-bar support. The U-shaped clamping bracket has two first rectangular holes, within which a clamping plate for engaging the standard section is slidably connected. The clamping plate has a second rectangular hole, through which a second screw is rotatably connected. One end of the second screw extends to the U-shaped clamping bracket. On one side of the U-shaped buckle bracket, a clamping plate is threaded onto the outer wall of the second screw. The clamping plate is slidably connected in the first rectangular hole. A groove is provided on one side of the second rectangular hole to engage with the clamping plate. By rotating the second rectangular hole, the clamping plate engages with the groove, thereby controlling the clamping of the standard section by the clamping plate. In the later stage, the extension and retraction of the cylinder output shaft can smoothly drive the standard section to move, making it convenient for the standard section to move along the trajectory of the sliding crossbeam, thus completing the installation and disassembly of the standard section. In addition, the fit between the U-shaped buckle bracket and the pad and the standard section can prevent the standard section from shaking significantly when pushing it to move.

[0021] The tower crane dismantling method includes the following steps:

[0022] S1. First, loosen the bolts to release the fixation between the two adjacent standard sections. Then, rotate the first screw. The first screw pushes the top block to slide in the relief groove so that the relief groove is just flush with the sliding crossbeam and extends into the guide groove.

[0023] S2. Start the cylinder. The output shaft of the cylinder pushes the uppermost standard section outward along the track of the sliding crossbeam through the U-shaped buckle bracket and the pad until the standard section is on the placement platform. Then rotate the second screw. The second screw is threadedly connected to the clamping plate. The clamping plate disengages from the clamping groove, releasing the clamping plate from the second rectangular hole. At the same time, the second rectangular hole releases the clamping plate from the standard section. Move the clamping plate outward to avoid the clamping plate from hindering the movement of the standard section. The standard section on the placement platform is lifted to the ground by the ground crane.

[0024] S3. After disassembling the top standard section, rotate the first screw to move the top block back into the clearance groove to prevent the top block from colliding with the standard section during the downward movement of the lifting beam. Activate the electromagnet in the claw on one side of the first lifting cylinder. The electromagnet generates a magnetic attraction force on the metal wedge block, which moves into the sliding groove and compresses the spring. The metal wedge block releases its support for the step. Then, activate the second lifting cylinder. The output shaft of the second lifting cylinder retracts, allowing the second lifting cylinder to drive the lifting beam and the first lifting cylinder to slide downwards until the claw on one side of the first lifting cylinder engages with the corresponding step again. Through the cooperation of the metal wedge block and the step, the first lifting cylinder can support the lifting beam again. During the downward movement of the lifting beam, the top of the standard section can just extend into the clearance groove. At this time, the sliding beam and the guide groove can be aligned. Repeat steps S1 and S2 to disassemble the top standard section again.

[0025] S4. After disassembly, activate the electromagnet inside the crawler claw on one side of the second lifting cylinder. The electromagnet attracts the metal wedge block into the sliding groove, releasing the metal wedge block from the step. Then activate the second lifting cylinder. The output shaft of the second lifting cylinder pushes the crawler claw down until the crawler claw engages with the next step. Then repeat step S3 to gradually disassemble the standard section.

[0026] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0027] In this invention, multiple sliding beams are fixedly connected inside the lifting beam, and these sliding beams are evenly distributed on both sides of the standard section. Multiple guide grooves are provided on the side of each standard section that is far from each other, and two clearance grooves are provided on the side of each sliding beam closest to the standard section. When the standard section is moved out of the lifting beam, the sliding beams slide in conjunction with the guide grooves, allowing the standard section to move smoothly out of the lifting beam along the trajectory of the sliding beams. Conversely, the standard section can be easily moved into the lifting beam, facilitating the docking of adjacent standard sections. Similarly, when the lifting beam moves up and down, the beams at the four corners of the standard section can extend into the clearance grooves, facilitating the sliding of the lifting beam on the tower crane body.

[0028] In this invention, the climbing claw includes a fixed block slidably connected to one side of the standard section. The inner wall of the fixed block away from the standard section is provided with a sliding groove. A metal wedge block is slidably connected in the sliding groove. A spring is fixedly connected to one side of the metal wedge block. Multiple electromagnets are fixedly connected to the inner wall of the sliding groove away from the standard section. By attracting the metal wedge block with the electromagnets, the support connection between the metal wedge block and the step can be released, which facilitates the up and down movement of the fixed block. Thus, during the alternating use of the first lifting cylinder and the second lifting cylinder, the climbing claw can alternately engage with the step, thereby enabling the lifting beam to rise and fall, which facilitates the installation and disassembly of the standard section.

[0029] In this invention, a top block that slidably connects to the guide groove is slidably connected in the clearance groove. A first screw is threadedly connected to the sliding crossbeam, and one end of the first screw is rotatably connected to the first screw. When it is necessary to move the standard section out of the lifting crossbeam, the first screw is rotated to extend the top block into the guide groove. Through the cooperation of the sliding crossbeam, the top block and the guide groove, the standard section can be easily moved out along the trajectory of the sliding crossbeam. Similarly, the top block extending into the guide groove can make the lifting crossbeam and the standard section engage, increasing the stability between the lifting crossbeam and the standard section. In addition, when the lifting crossbeam is raised or lowered, the top block is moved out of the guide groove, which facilitates the four beams of the standard section to pass through the clearance groove, thus facilitating the raising and lowering of the lifting crossbeam.

[0030] In this invention, the output shaft of the cylinder is fixedly connected to a U-shaped buckle bracket. Multiple pads are fixedly connected to the top and bottom of the U-shaped buckle bracket. A clamping plate is slidably connected within the first rectangular hole, and a second screw is rotatably connected within the first rectangular hole. A clamping plate is threaded onto the outer wall of the second screw. A slot is provided on one side of the second rectangular hole to engage with the clamping plate. By rotating the second rectangular hole, the clamping plate engages with the slot, thereby controlling the clamping of the standard section. Later, the extension and retraction of the cylinder output shaft can smoothly move the standard section, facilitating its movement along the trajectory of the sliding crossbeam, thus completing the installation and disassembly of the standard section. Furthermore, the close contact between the U-shaped buckle bracket, the pads, and the standard section prevents significant shaking of the standard section when it is moved.

[0031] In this invention, the cooperation of the sliding crossbeam, guide groove and top block not only facilitates the handling of standard sections and the docking of two adjacent standard sections, but also limits the standard sections and the lifting crossbeam, preventing the lifting crossbeam from shaking during sliding. Furthermore, the U-shaped buckle frame can easily move the standard sections, allowing for handling without much manual labor, thus avoiding accidents during high-altitude operations and saving installation and disassembly time. Attached Figure Description

[0032] Figure 1This is a three-dimensional structural diagram of an extension system provided in an embodiment of the present invention;

[0033] Figure 2 This is a three-dimensional cross-sectional structural diagram of an extension system provided in an embodiment of the present invention;

[0034] Figure 3 A three-dimensional structural schematic diagram of a standard section of a top extension system provided in an embodiment of the present invention;

[0035] Figure 4 A three-dimensional structural diagram of the standard section and sliding crossbeam of a top extension system provided in an embodiment of the present invention;

[0036] Figure 5 A three-dimensional exploded structural diagram of a standard section and a sliding crossbeam of an extension system provided in an embodiment of the present invention;

[0037] Figure 6 A three-dimensional structural diagram of a first lifting cylinder, a second lifting cylinder, and a climbing claw of a lifting system provided in an embodiment of the present invention;

[0038] Figure 7 This is a three-dimensional cross-sectional structural diagram of the climbing claw of an extension system provided in an embodiment of the present invention;

[0039] Figure 8 This is a three-dimensional structural diagram of the T-block and T-groove cooperation of an extension system provided in an embodiment of the present invention;

[0040] Figure 9 This is a partial front view sectional view of the lifting beam of a jacking system provided in Embodiment 2 of the present invention;

[0041] Figure 10 This is a top sectional view of the lifting beam of a jacking system provided in Embodiment 2 of the present invention;

[0042] Figure 11 This is an enlarged structural diagram of point A of an extension system provided in Embodiment 2 of the present invention.

[0043] Figure label:

[0044] 1. Tower crane body; 2. Standard section; 3. Lifting beam; 4. Placement platform; 5. Lower connecting groove; 6. Upper connecting groove; 7. Bolt; 8. Sliding beam; 9. Clearance groove; 10. Top block; 11. First screw; 12. Guide groove; 13. First lifting cylinder; 14. Second lifting cylinder; 15. Climbing claw; 16. Fixing block; 17. Sliding groove; 18. Metal wedge block; 19. Spring; 20. Electromagnet; 21. Step; 22. T-block; 23. T-slide groove; 24. Support rod; 25. Triangular plate; 26. Top seat; 27. Cylinder; 28. U-shaped buckle frame; 29. ​​Pad plate; 30. First rectangular hole; 31. Clamping plate; 32. Second screw; 33. Second rectangular hole; 34. Slot; 35. Clamping plate; 36. First base; 37. Second base; 38. Three-bar support. Detailed Implementation

[0045] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0046] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0047] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0048] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0049] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0050] Example 1

[0051] Reference Figure 1 , Figure 2 and Figure 3 This embodiment of a jacking system includes: a tower crane body 1 and a jacking beam 3 slidably sleeved on the outer wall of the tower crane body 1. The tower crane body 1 is formed by stacking multiple standard sections 2. Multiple three-bar supports 38 are fixedly connected inside the standard sections 2. A connecting structure is set inside the standard sections 2 to fix two adjacent standard sections 2. Multiple jacking structures are set inside the jacking beam 3 to allow the jacking beam 3 to slide up and down on the outer wall of the tower crane body 1. A moving structure is set inside the jacking beam 3 to move the upper standard section 2 smoothly and easily from the top of the lower standard section 2.

[0052] Reference Figure 1 and Figure 2 The top of the lifting beam 3 is fixedly connected to the top seat 26 by bolts. The lifting beam 3 is fixedly connected to the placement platform 4 by bolts, and the tower crane body 1 passes through the placement platform 4. Multiple support rods 24 are fixedly connected to one side of the lifting beam 3 by bolts, and the top of the support rods 24 is fixedly connected to the bottom of the placement platform 4 by bolts.

[0053] Reference Figure 3 The connection structure includes upper connecting grooves 6 respectively set at the four top corners of the standard section 2, and lower connecting grooves 5 set at the four bottom corners of the standard section 2. Multiple bolts 7 are provided on the bottom inner wall of the lower connecting groove 5, and the bottom end of the bolts 7 extends into the upper connecting groove 6 in the adjacent standard section 2. The multiple bolts 7 can fix two adjacent standard sections 2, which is not only easy to install, but also easy to disassemble later. Since the bolts 7 are set in the lower connecting groove 5 and the upper connecting groove 6, the bolts 7 can be prevented from being corroded by rainwater and rusting.

[0054] Reference Figure 6The jacking structure includes a first base 36 and a second base 37 that are bolted to the inner wall of one side of the jacking beam 3. A first jacking cylinder 13 is rotatably connected inside the first base 36, and a second jacking cylinder 14 is rotatably connected inside the second base 37. The output shafts of the first jacking cylinder 13 and the second jacking cylinder 14 are both rotatably connected to climbing claws 15, and the climbing claws 15 are slidably engaged with the standard section 2. A number of steps 21 that engage with the climbing claws 15 are bolted to one side of the standard section 2. By alternating the use of the first jacking cylinder 13 and the second jacking cylinder 14, the jacking beam 3 can be jacked up and down on the outer wall of the tower crane body 1, which facilitates the installation and disassembly of the standard section 2.

[0055] Reference Figure 7 The climbing claw 15 includes a fixed block 16 slidably connected to one side of the standard section 2. The inner wall of the fixed block 16 away from the standard section 2 is provided with a sliding groove 17. A metal wedge block 18 that engages with the step 21 is slidably connected in the sliding groove 17. A spring 19 is fixedly connected to the side of the metal wedge block 18 away from the standard section 2, and the end of the spring 19 away from the metal wedge block 18 is fixedly connected to the inner wall of the sliding groove 17. Multiple electromagnets 20 are fixedly connected to the inner wall of the sliding groove 17 away from the standard section 2 by bolts. The attraction of the electromagnets 20 to the metal wedge block 18 can release the support connection between the metal wedge block 18 and the step 21, making it convenient for the fixed block 16 to move up and down. Thus, during the alternating use of the first lifting cylinder 13 and the second lifting cylinder 14, the climbing claw 15 can alternately engage with the step 21, thereby enabling the lifting beam 3 to rise and fall, facilitating the installation and disassembly of the standard section 2.

[0056] Reference Figure 4 and Figure 5 The movable structure includes multiple sliding beams 8 fixedly connected to the lifting beam 3 by bolts. The multiple sliding beams 8 are evenly distributed on both sides of the standard section 2. The side of the standard section 2 that is far away from each other is provided with multiple guide grooves 12, and the guide grooves 12 are slidably engaged with the sliding beams 8. The side of the sliding beam 8 that is close to the standard section 2 is provided with two clearance grooves 9. When the standard section 2 is moved out of the lifting beam 3, the sliding beam 8 is slidably engaged with the guide grooves 12, so that the standard section 2 can be smoothly moved out of the lifting beam 3 along the trajectory of the sliding beam 8. Conversely, the standard section 2 can be easily moved into the lifting beam 3, which is convenient for connecting two adjacent standard sections 2. Similarly, when the lifting beam 3 moves up and down, the beams at the four corners of the standard section 2 can just extend into the clearance grooves 9, which is convenient for the lifting beam 3 to slide on the tower crane body 1.

[0057] Reference Figure 5A top block 10 that mates with a guide groove 12 is slidably connected inside the clearance groove 9. A first screw 11 is threadedly connected to the sliding crossbeam 8, and one end of the first screw 11 extends into the clearance groove 9 and is rotatably connected to the top block 10. When it is necessary to move the standard section 2 out of the lifting crossbeam 3, the first screw 11 is rotated to extend the top block 10 into the guide groove 12. Through the cooperation of the sliding crossbeam 8, the top block 10 and the guide groove 12, the standard section 2 can be easily moved out along the trajectory of the sliding crossbeam 8. Similarly, the top block 10 extending into the guide groove 12 can make the lifting crossbeam 3 and the standard section 2 engage, increasing the stability between the lifting crossbeam 3 and the standard section 2. In addition, when the lifting crossbeam 3 is raised or lowered, the top block 10 is moved out of the guide groove 12, so that the four beams of the standard section 2 can pass through the clearance groove 9, which facilitates the raising and lowering of the lifting crossbeam 3.

[0058] Reference Figure 7 The bottom of the fixing block 16 is fixedly connected to two triangular plates 25 by bolts. The side of the fixing block 16 near the standard section 2 is fixedly connected to two T-shaped blocks 22 by bolts, and the T-shaped blocks 22 are fixedly connected to the triangular plates 25 by bolts. The standard section 2 has multiple T-shaped grooves 23 on one side, and the T-shaped blocks 22 and the T-shaped grooves 23 slide in cooperation. The T-shaped blocks 22 and the T-shaped grooves 23 can increase the stability of sliding between the fixing block 16 and the standard section 2. Similarly, the triangular plates 25 can support the fixing block 16.

[0059] Example 2

[0060] Reference Figure 1 , Figure 2 and Figure 3 This embodiment of a jacking system includes: a tower crane body 1 and a jacking beam 3 slidably sleeved on the outer wall of the tower crane body 1. The tower crane body 1 is formed by stacking multiple standard sections 2. Multiple three-bar supports 38 are fixedly connected inside the standard sections 2. A connecting structure is set inside the standard sections 2 to fix two adjacent standard sections 2. Multiple jacking structures are set inside the jacking beam 3 to allow the jacking beam 3 to slide up and down on the outer wall of the tower crane body 1. A moving structure is set inside the jacking beam 3 to move the upper standard section 2 smoothly and easily from the top of the lower standard section 2.

[0061] Reference Figure 1 and Figure 2 The top of the lifting beam 3 is fixedly connected to the top seat 26 by bolts. The lifting beam 3 is fixedly connected to the placement platform 4 by bolts, and the tower crane body 1 passes through the placement platform 4. Multiple support rods 24 are fixedly connected to one side of the lifting beam 3 by bolts, and the top of the support rods 24 is fixedly connected to the bottom of the placement platform 4 by bolts.

[0062] Reference Figure 3The connection structure includes upper connecting grooves 6 respectively set at the four top corners of the standard section 2, and lower connecting grooves 5 set at the four bottom corners of the standard section 2. Multiple bolts 7 are provided on the bottom inner wall of the lower connecting groove 5, and the bottom end of the bolts 7 extends into the upper connecting groove 6 in the adjacent standard section 2. The multiple bolts 7 can fix two adjacent standard sections 2, which is not only easy to install, but also easy to disassemble later. Since the bolts 7 are set in the lower connecting groove 5 and the upper connecting groove 6, the bolts 7 can be prevented from being corroded by rainwater and rusting.

[0063] Reference Figure 6 The jacking structure includes a first base 36 and a second base 37 that are bolted to the inner wall of one side of the jacking beam 3. A first jacking cylinder 13 is rotatably connected inside the first base 36, and a second jacking cylinder 14 is rotatably connected inside the second base 37. The output shafts of the first jacking cylinder 13 and the second jacking cylinder 14 are both rotatably connected to climbing claws 15, and the climbing claws 15 are slidably engaged with the standard section 2. A number of steps 21 that engage with the climbing claws 15 are bolted to one side of the standard section 2. By alternating the use of the first jacking cylinder 13 and the second jacking cylinder 14, the jacking beam 3 can be jacked up and down on the outer wall of the tower crane body 1, which facilitates the installation and disassembly of the standard section 2.

[0064] Reference Figure 7 The climbing claw 15 includes a fixed block 16 slidably connected to one side of the standard section 2. The inner wall of the fixed block 16 away from the standard section 2 is provided with a sliding groove 17. A metal wedge block 18 that engages with the step 21 is slidably connected in the sliding groove 17. A spring 19 is fixedly connected to the side of the metal wedge block 18 away from the standard section 2, and the end of the spring 19 away from the metal wedge block 18 is fixedly connected to the inner wall of the sliding groove 17. Multiple electromagnets 20 are fixedly connected to the inner wall of the sliding groove 17 away from the standard section 2 by bolts. The attraction of the electromagnets 20 to the metal wedge block 18 can release the support connection between the metal wedge block 18 and the step 21, making it convenient for the fixed block 16 to move up and down. Thus, during the alternating use of the first lifting cylinder 13 and the second lifting cylinder 14, the climbing claw 15 can alternately engage with the step 21, thereby enabling the lifting beam 3 to rise and fall, facilitating the installation and disassembly of the standard section 2.

[0065] Reference Figure 4 and Figure 5The movable structure includes multiple sliding beams 8 fixedly connected to the lifting beam 3 by bolts. The multiple sliding beams 8 are evenly distributed on both sides of the standard section 2. The side of the standard section 2 that is far away from each other is provided with multiple guide grooves 12, and the guide grooves 12 are slidably engaged with the sliding beams 8. The side of the sliding beam 8 that is close to the standard section 2 is provided with two clearance grooves 9. When the standard section 2 is moved out of the lifting beam 3, the sliding beam 8 is slidably engaged with the guide grooves 12, so that the standard section 2 can be smoothly moved out of the lifting beam 3 along the trajectory of the sliding beam 8. Conversely, the standard section 2 can be easily moved into the lifting beam 3, which is convenient for connecting two adjacent standard sections 2. Similarly, when the lifting beam 3 moves up and down, the beams at the four corners of the standard section 2 can just extend into the clearance grooves 9, which is convenient for the lifting beam 3 to slide on the tower crane body 1.

[0066] Reference Figure 5 A top block 10 that mates with a guide groove 12 is slidably connected inside the clearance groove 9. A first screw 11 is threadedly connected to the sliding crossbeam 8, and one end of the first screw 11 extends into the clearance groove 9 and is rotatably connected to the top block 10. When it is necessary to move the standard section 2 out of the lifting crossbeam 3, the first screw 11 is rotated to extend the top block 10 into the guide groove 12. Through the cooperation of the sliding crossbeam 8, the top block 10 and the guide groove 12, the standard section 2 can be easily moved out along the trajectory of the sliding crossbeam 8. Similarly, the top block 10 extending into the guide groove 12 can make the lifting crossbeam 3 and the standard section 2 engage, increasing the stability between the lifting crossbeam 3 and the standard section 2. In addition, when the lifting crossbeam 3 is raised or lowered, the top block 10 is moved out of the guide groove 12, so that the four beams of the standard section 2 can pass through the clearance groove 9, which facilitates the raising and lowering of the lifting crossbeam 3.

[0067] Reference Figure 7 The bottom of the fixing block 16 is fixedly connected to two triangular plates 25 by bolts. The side of the fixing block 16 near the standard section 2 is fixedly connected to two T-shaped blocks 22 by bolts, and the T-shaped blocks 22 are fixedly connected to the triangular plates 25 by bolts. The standard section 2 has multiple T-shaped grooves 23 on one side, and the T-shaped blocks 22 and the T-shaped grooves 23 slide in cooperation. The T-shaped blocks 22 and the T-shaped grooves 23 can increase the stability of sliding between the fixing block 16 and the standard section 2. Similarly, the triangular plates 25 can support the fixing block 16.

[0068] Reference Figure 9 , Figure 10 and Figure 11A cylinder 27 is fixedly inserted through the lifting beam 3. The output shaft of the cylinder 27 is bolted to a U-shaped clamping bracket 28, which fits against the two beams of the standard section 2. Multiple pads 29 are bolted to the top and bottom of the U-shaped clamping bracket 28, and these pads 29 contact the three-bar support 38. The U-shaped clamping bracket 28 has two first rectangular holes 30. A clamping plate 31 for engaging the standard section 2 is slidably connected within the first rectangular holes 30. A second rectangular hole 33 is provided within the clamping plate 31. A second screw 32, passing through the second rectangular hole 33, is rotatably connected within the first rectangular holes 30. One end of the second screw 32 extends to the U-shaped clamping bracket 2. On one side of 8, a clamping plate 35 is threaded on the outer wall of the second screw 32. The clamping plate 35 is slidably connected in the first rectangular hole 30. A groove 34 is provided on one side of the second rectangular hole 33 to engage with the clamping plate 35. By rotating the second rectangular hole 33, the clamping plate 35 is engaged with the groove 34, thereby controlling the clamping of the clamping plate 31 on the standard section 2. In the later stage, the extension and retraction of the output shaft of the cylinder 27 can smoothly drive the standard section 2 to move, making it convenient for the standard section 2 to move along the trajectory of the sliding beam 8, thus completing the installation and disassembly of the standard section 2. In addition, the fit between the U-shaped buckle bracket 28 and the pad 29 and the standard section 2 can prevent the standard section 2 from shaking significantly when pushing it to move.

[0069] A method for dismantling a tower crane includes the following steps:

[0070] S1. First, loosen the bolt 7 to release the fixation between the two adjacent standard sections 2. Then, rotate the first screw 11. The first screw 11 pushes the top block 10 to slide in the relief groove 9 so that the relief groove 9 can be flush with the sliding crossbeam 8 and extend into the guide groove 12.

[0071] S2. Start cylinder 27. The output shaft of cylinder 27 pushes the uppermost standard section 2 outward along the trajectory of sliding beam 8 through U-shaped buckle bracket 28 and pad 29 until the standard section 2 is on the placement platform 4. Then rotate the second screw 32. The second screw 32 is threadedly connected to the clamping plate 35. The clamping plate 35 disengages from the clamping groove 34, releasing the clamping plate 35 from the second rectangular hole 33. At the same time, the clamping plate 35 from the standard section 2 is released. Move the clamping plate 31 outward to avoid the clamping plate 31 from hindering the movement of the standard section 2. The standard section 2 on the placement platform 4 is lifted to the ground by the ground crane.

[0072] S3. After disassembling the uppermost standard section 2, rotate the first screw 11 to move the top block 10 back into the clearance groove 9 to prevent the top block 10 from colliding with the standard section 2 during the downward movement of the lifting beam 3. Activate the electromagnet 20 in the crawler 15 on one side of the first lifting cylinder 13. The electromagnet 20 generates a magnetic attraction force on the metal wedge block 18, causing the metal wedge block 18 to move into the sliding groove 17 and compress the spring 19. The metal wedge block 18 releases its support for the step 21. Then, activate the second lifting cylinder 14. The output shaft of the second lifting cylinder 14 retracts. The second lifting cylinder 14 can drive the lifting beam 3 and the first lifting cylinder 13 to slide downwards until the climbing claw 15 on one side of the first lifting cylinder 13 engages with the corresponding step 21 again. Through the cooperation of the metal wedge block 18 and the step 21, the first lifting cylinder 13 can support the lifting beam 3 again. During the downward movement of the lifting beam 3, the top of the standard section 2 can just extend into the relief groove 9. At this time, the sliding beam 8 and the guide groove 12 can be aligned. Repeating steps S1 and S2, the standard section 2 located above can be disassembled again.

[0073] S4. After disassembly, activate the electromagnet 20 in the crawler 15 on one side of the second lifting cylinder 14. The electromagnet 20 attracts the metal wedge block 18 into the sliding groove 17, releasing the metal wedge block 18 from the step 21. Then activate the second lifting cylinder 14. The output shaft of the second lifting cylinder 14 pushes the crawler 15 down until the crawler 15 engages with the next step 21. Then repeat step S3 to gradually disassemble the standard section 2.

[0074] However, as is well known to those skilled in the art, the working principles and wiring methods of cylinder 27, first lifting cylinder 13, second lifting cylinder 14 and electromagnet 20 are commonplace and belong to conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0075] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A top extension system, characterized in that, include: The tower crane body (1) and the lifting beam (3) that is slidably sleeved on the outer wall of the tower crane body (1) are formed by stacking multiple standard sections (2) on top of each other. Multiple three-bar supports (38) are fixedly connected inside the standard section (2). The connecting structure is set inside the standard section (2) and is used to fix two adjacent standard sections (2) in the upper and lower sections. Multiple sets of top extension structures are set inside the lifting beam (3) to allow the lifting beam (3) to slide up and down on the outer wall of the tower crane body (1); A movable structure, installed within the lifting beam (3), is used to smoothly and easily move the upper standard section (2) from the top of the lower standard section (2). The movable structure includes multiple sliding beams (8) fixedly connected within the lifting beam (3), with the multiple sliding beams (8) evenly distributed on both sides of the standard section (2). Each side of the standard section (2) away from each other is provided with multiple guide grooves (12), and the guide grooves (12) slide in cooperation with the sliding beams (8). Two clearance grooves (9) are provided on the side near the standard section (2). A top block (10) that cooperates with the guide groove (12) is slidably connected in the clearance groove (9). A first screw (11) is threadedly connected in the sliding beam (8), and one end of the first screw (11) extends into the clearance groove (9) and is rotatably connected to the top block (10). When it is necessary to move the standard section (2) out of the lifting beam (3), the first screw (11) is rotated to make the top block (10) extend into the guide groove (12).

2. The jacking system according to claim 1, characterized in that, The connection structure includes upper connecting grooves (6) respectively set at the top four corners of the standard section (2), and lower connecting grooves (5) are provided at the bottom four corners of the standard section (2). The bottom inner wall of the lower connecting groove (5) is provided with multiple bolts (7), and the bottom end of the bolts (7) extends into the upper connecting groove (6) in the adjacent standard section (2).

3. The jacking system according to claim 2, characterized in that, The jacking structure includes a first base (36) and a second base (37) fixedly connected to the inner wall of one side of the jacking beam (3). A first jacking cylinder (13) is rotatably connected inside the first base (36), and a second jacking cylinder (14) is rotatably connected inside the second base (37). The output shafts of the first jacking cylinder (13) and the second jacking cylinder (14) are rotatably connected to climbing claws (15), and the climbing claws (15) are slidably engaged with the standard section (2). A plurality of steps (21) that engage with the climbing claws (15) are fixedly connected to one side of the standard section (2).

4. The jacking system according to claim 3, characterized in that, The climbing claw (15) includes a fixed block (16) slidably connected to one side of the standard section (2). The inner wall of the fixed block (16) away from the standard section (2) is provided with a sliding groove (17). A metal wedge block (18) that engages with the step (21) is slidably connected in the sliding groove (17). A spring (19) is fixedly connected to the side of the metal wedge block (18) away from the standard section (2), and one end of the spring (19) away from the metal wedge block (18) is fixedly connected to the inner wall of one side of the sliding groove (17). A plurality of electromagnets (20) are fixedly connected to the inner wall of the sliding groove (17) away from the standard section (2).

5. The jacking system according to claim 4, characterized in that, The bottom of the fixed block (16) is fixedly connected to two triangular plates (25). The fixed block (16) is fixedly connected to two T-shaped blocks (22) on the side near the standard section (2). The T-shaped blocks (22) are fixedly connected to the triangular plates (25). The standard section (2) is provided with multiple T-shaped grooves (23) on one side. The T-shaped blocks (22) and the T-shaped grooves (23) slide together.

6. The jacking system according to claim 5, characterized in that, The top of the lifting beam (3) is fixedly connected to a top seat (26), and a placement platform (4) is fixedly connected inside the lifting beam (3). The tower crane body (1) passes through the placement platform (4). Multiple support rods (24) are fixedly connected to one side of the lifting beam (3), and the top of the support rods (24) is fixedly connected to the bottom of the placement platform (4).

7. A top extension system according to claim 6, characterized in that, A cylinder (27) is fixedly inserted inside the lifting beam (3). The output shaft of the cylinder (27) is fixedly connected to a U-shaped buckle frame (28), and the U-shaped buckle frame (28) is in contact with the two beams of the standard section (2). Multiple pads (29) are fixedly connected to the top and bottom of the U-shaped buckle frame (28), and the pads (29) are in contact with the three-bar bracket (38). The U-shaped buckle frame (28) is provided with two first rectangular holes (30). The first rectangular holes (30) are slidably connected to a device for locking the standard section (2). The clamping plate (31) is connected, and the clamping plate (31) is provided with a second rectangular hole (33). A second screw (32) is rotatably connected in the first rectangular hole (30) and passes through the second rectangular hole (33). One end of the second screw (32) extends to one side of the U-shaped buckle frame (28). A clamping plate (35) is threaded on the outer wall of the second screw (32). The clamping plate (35) is slidably connected in the first rectangular hole (30). A groove (34) is provided on one side of the second rectangular hole (33) to engage with the clamping plate (35).

8. A method for dismantling a tower crane using the jacking system as described in claim 7, characterized in that, Includes the following steps: S1. First, loosen the bolt (7) to release the fixation between the two adjacent standard sections (2). Then, rotate the first screw (11). The first screw (11) pushes the top block (10) to slide in the relief groove (9) so that the top block (10) extends into the guide groove (12). S2. Start cylinder (27). The output shaft of cylinder (27) pushes the uppermost standard section (2) outward along the trajectory of sliding beam (8) through U-shaped buckle bracket (28) and pad (29) until the standard section (2) is on the placement platform (4). Then rotate the second screw (32). The second screw (32) is threadedly connected to the clamping plate (35). The clamping plate (35) disengages from the slot (34), releasing the clamping plate (35) from the second rectangular hole (33). At the same time, the clamping plate (33) is released from the standard section (2). Move the clamping plate (31) outward to avoid the clamping plate (31) from hindering the movement of the standard section (2). The standard section (2) on the placement platform (4) is lifted to the ground by the ground crane. S3. After disassembling the uppermost standard section (2), rotate the first screw (11) to move the top block (10) back into the clearance groove (9) to avoid the top block (10) colliding with the standard section (2) during the downward movement of the lifting beam (3). Start the electromagnet (20) in the crawler (15) on one side of the first lifting cylinder (13). The electromagnet (20) generates a magnetic attraction force on the metal wedge block (18). The metal wedge block (18) moves into the sliding groove (17) and squeezes the spring (19). The metal wedge block (18) releases its support on the step (21). Then start the second lifting cylinder (14). The output shaft of the second lifting cylinder (14) retracts. The second lifting cylinder (14) can drive the lifting beam (3) and the first lifting cylinder (13) to slide downward until the climbing claw (15) on one side of the first lifting cylinder (13) engages with the corresponding step (21) again. Through the cooperation of the metal wedge block (18) and the step (21), the first lifting cylinder (13) can support the lifting beam (3) again. During the downward movement of the lifting beam (3), the top of the standard section (2) can just extend into the relief groove (9). At this time, the sliding beam (8) and the guide groove (12) can be aligned. Repeating steps S1 and S2, the standard section (2) located above can be disassembled again. S4. After disassembly, start the electromagnet (20) in the climbing claw (15) on one side of the second lifting cylinder (14). The electromagnet (20) attracts the metal wedge block (18) into the sliding groove (17), releasing the metal wedge block (18) from the step (21). Then start the second lifting cylinder (14). The output shaft of the second lifting cylinder (14) pushes the climbing claw (15) down until the climbing claw (15) engages with the next step (21). Then repeat step S3 to gradually disassemble the standard section (2).

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