A tower crane structure auxiliary maintenance device

Abstract

The present application relates to the technical field of building machinery equipment maintenance, more specifically to a tower crane structure auxiliary maintenance device, comprising a rack, a turnover mechanism and a rotating mechanism. The turnover mechanism is composed of a hydraulic cylinder and a rotating support plate, the hydraulic cylinder is fixed to the machine base, the telescopic rod end is hinged to the left side of the rotating support plate, the right side of the rotating support plate is rotationally connected with the rotating mechanism, the bottom is hinged to the rack, and large-angle turnover of the tower crane section can be realized; the rotating mechanism comprises a rotating plate connected with the rotating support plate through a rotating shaft, used for fixing the tower crane section and driven to rotate by a stepping motor, to drive the tower crane section to rotate circumferentially. The device significantly improves the efficiency and safety of tower crane section maintenance through mechanization and automation operation, reduces the labor intensity and dependence on lifting equipment, and is suitable for high-standard maintenance requirements of large engineering sites.

Description

Technical Field

[0001] This invention relates to the field of maintenance and upkeep technology for construction machinery and equipment, and more specifically to an auxiliary maintenance device for tower crane structures. Background Technology

[0002] On construction sites, especially in large-scale projects such as nuclear power plant construction, tower cranes are key lifting equipment that operate under high intensity and high frequency for extended periods. Their structural safety is directly related to construction safety and project progress. The main structure of a tower crane consists of multiple standard sections (tower crane sections) connected by high-strength bolts. During use, regular maintenance operations such as inspection, cleaning, corrosion prevention, and bolt tightening of the tower crane sections are required.

[0003] Currently, the maintenance of tower crane sections mainly relies on manual methods. Typically, the tower crane sections need to be disassembled and placed on the ground, where maintenance personnel observe and operate them by climbing, turning, or using simple supports. This method has the following prominent problems: 1. Low work efficiency: Manually turning and rotating tower crane sections is difficult, especially for large and heavy sections, often requiring multiple people or assistance from other lifting equipment, which is time-consuming, labor-intensive, and physically demanding; 2. Occupation of lifting resources: Maintenance often requires the use of tower cranes or other lifting equipment, affecting normal construction progress and increasing shift costs.

[0004] Therefore, there is an urgent need for a specialized device that can provide safe, efficient, and comprehensive auxiliary maintenance for tower crane sections, reduce reliance on manpower and external equipment, and improve the mechanization and standardization of maintenance operations. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a tower crane structure auxiliary maintenance device that can achieve safe, efficient and comprehensive auxiliary maintenance of tower crane sections and reduce dependence on manpower and external equipment.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A tower crane structural auxiliary maintenance device includes a frame, a tilting mechanism mounted on the frame, and a rotating mechanism connected to the tilting mechanism. The rotating mechanism is used to connect tower crane sections. The tilting mechanism includes a hydraulic cylinder and a rotating support plate. The hydraulic cylinder is fixedly mounted on the frame base. The left side of the rotating support plate is hinged to the end of the hydraulic telescopic rod of the hydraulic cylinder, the right side of the rotating support plate is rotatably connected to the rotating mechanism, and the bottom of the rotating support plate is hinged to the frame. The rotating mechanism includes a rotating plate rotatably connected to the rotating support plate via a rotating shaft. The right side of the rotating plate is used to bolt and fix the tower crane section. A stepper motor is fixedly mounted on the frame base and is driven by the rotating plate to drive the rotating plate to rotate.

[0008] As a preferred embodiment, a further technical solution of the present invention is:

[0009] Preferably, the transmission connection structure between the stepper motor and the rotating plate is as follows: a wheel seat is provided on the base, a central shaft is rotatably connected to the wheel seat, and a drive wheel is connected to the central shaft; the output shaft of the stepper motor is fixedly connected to the central shaft, and an annular groove is provided on the left side of the rotating plate, and the same belt is sleeved on the annular groove and the drive wheel.

[0010] Preferably, a counterweight assembly is also installed on the base.

[0011] Preferably, the counterweight assembly includes a counterweight frame, which includes a first support plate, a second support plate, and a third support plate arranged sequentially from top to bottom. The third support plate overlaps the machine base. The left ends of the first and second support plates are fixedly connected by a first support vertical plate, and the right ends of the second and third support plates are fixedly connected by a second support vertical plate. Sliding grooves are respectively opened on the right ends of the opposite sides of the first and second support plates, and sliding grooves are respectively opened on the left ends of the opposite sides of the second and third support plates. Baffles are slidably connected in both sliding grooves. Counterweights are placed between the first and second support plates and between the second and third support plates.

[0012] Preferably, a movable seat is welded to the bottom of the third support plate, and a rolling assembly is installed on the movable seat; mounting holes are provided on the base corresponding to the movable seat.

[0013] Preferably, the rolling assembly includes an outer cylinder fixedly connected to the movable seat and an inner cylinder slidably disposed within the outer cylinder. Rotary wheels are rotatably disposed at both the bottom and top of the inner cylinder. A sliding groove is provided on the top of the movable seat, and a top plate is slidably connected within the groove. A storage cavity for storing the rotary wheels is opened on the bottom surface of the top plate. When the rotary wheel at the top of the inner cylinder abuts against the bottom surface of the top plate and is located outside the storage cavity, the rotary wheel at the bottom of the inner cylinder contacts the ground, allowing the entire counterweight frame to move via the rotary wheel at the bottom of the inner cylinder. When the rotary wheel at the top of the inner cylinder is stored in the storage cavity, the counterweight frame sits on the frame.

[0014] Preferably, the top plate has multiple positioning holes, and the movable seat is threaded with positioning bolts for insertion into the positioning holes.

[0015] Preferably, an anti-detachment ring platform is provided on the outer wall of the inner cylinder, and limit plates are provided at the top and bottom of the inner wall of the outer cylinder to prevent the anti-detachment ring platform from sliding out.

[0016] Preferably, the longitudinal section of the movable seat has a U-shaped or I-shaped structure.

[0017] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0018] The core benefits of this invention lie in its highly mechanized and automated structural design, which significantly improves the efficiency, safety, and convenience of maintenance and upkeep of standard tower crane sections.

[0019] Specifically, firstly, in terms of functional execution, the tilting mechanism uses a hydraulic cylinder to drive a rotating support plate in a hinged motion, providing a stable and powerful large-angle tilting action for the tower crane section fixed to it. This allows maintenance personnel to easily access the bottom, top, and all sides of the section, completely solving the pain points of traditional manual tilting of heavy components, which is difficult, dangerous, and inefficient. Simultaneously, the rotating mechanism uses a stepper motor combined with belt drive, which can precisely control the rotating plate connecting the tower crane section to rotate at a uniform speed or in steps. This achieves 360° circumferential exposure of the tower crane section without blind spots, greatly facilitating comprehensive inspection, cleaning, anti-corrosion spraying, and tightening of connecting bolts, welds, and the structural body, integrating the originally cumbersome process into a unified mechanical operation.

[0020] Secondly, in terms of system stability, the counterweight assembly adopts a multi-layer adjustable frame structure. By flexibly adding or removing counterweights between different layers, it can dynamically balance the huge overturning moment generated during the flipping and rotation process, ensuring the structural rigidity and stable operation of the entire device under load conditions, and fundamentally eliminating safety hazards.

[0021] Finally, regarding equipment mobility, the innovative rolling assembly integrates a liftable roller mechanism. By changing the relative position of the top roller within the top plate storage cavity through the sliding inner cylinder, the device can quickly switch between "mobile" and "fixed" working modes. When mobile, the roller support lifts the frame off the ground, facilitating manual or equipment towing and transport; when fixed, the frame reliably rests on the ground, forming a stable working platform. This design greatly enhances the equipment's flexibility and site adaptability, reduces the occupation of other lifting equipment on site, and optimizes the allocation of construction resources. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the auxiliary maintenance device for the tower crane structure in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the counterweight assembly after the rotating wheel is ejected in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the counterweight assembly when the rotating wheel is not ejected in an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Base; 2. Counterweight assembly; 3. Hydraulic telescopic rod; 4. Rotating support plate; 5. Rotating plate; 6. Belt; 7. Tower crane section; 21. Counterweight frame; 2101. First support horizontal plate; 2102. Second support horizontal plate; 2103. Third support horizontal plate; 22. Baffle; 23. Counterweight component; 24. Moving seat; 25. Rolling assembly; 2501. Outer cylinder; 2502. Inner cylinder; 2503. Limiting plate; 2504. Anti-detachment ring platform; 26. Top plate; 27. Positioning bolt; 28. Reception cavity. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0027] like Figures 1 to 3 As shown in the figure, this embodiment provides an auxiliary maintenance device for a tower crane structure, including a frame, a tilting mechanism on the frame, and a rotating mechanism connected to the tilting mechanism. The rotating mechanism is used to connect the tower crane section 7. The tilting mechanism includes a hydraulic cylinder and a rotating support plate 4. The hydraulic cylinder is fixedly installed on the base 1. The left side of the rotating support plate 4 is hinged to the end of the hydraulic telescopic rod 3 of the hydraulic cylinder. The hydraulic telescopic rod 3 drives the rotating support plate 4 to be lifted, thereby driving the rotating support plate 4 to tilt. The right side of the rotating support plate 4 is rotatably connected to the rotating mechanism, and the bottom of the rotating support plate 4 is hinged to the frame. The rotating mechanism includes a rotating plate 5 rotatably connected to the rotating support plate 4 through a rotating shaft. The right side of the rotating plate 5 is used to bolt and fix the tower crane section 7. A stepper motor is fixedly installed on the base 1. The stepper motor is driven by the rotating plate 5 to drive the rotating plate 5 to rotate.

[0028] Preferably, the transmission connection structure between the stepper motor and the rotating plate 5 is as follows: a wheel seat is provided on the base 1, a central shaft is rotatably connected to the wheel seat, and a drive wheel is connected to the central shaft; the output shaft of the stepper motor is fixedly connected to the central shaft; an annular groove is provided on the left side of the rotating plate 5, and the same belt 6 is sleeved on the annular groove and the drive wheel. The tower crane section 7 is fixed to the right side of the rotating plate 5 by bolts. In use, the stepper motor drives the drive wheel to rotate, the rotation of the drive wheel drives the belt 6 and the rotating plate 5 to rotate, and thus drives the tower crane section 7 on the rotating plate 5 to rotate.

[0029] Preferably, a counterweight assembly 2 is also installed on the base 1. The counterweight assembly 2 increases the weight of the base 1, which facilitates the stable operation of the auxiliary maintenance device. After removing the counterweight 23 in the counterweight assembly 2, the base 1 can be moved easily.

[0030] Preferably, the counterweight assembly 2 includes a counterweight frame 21, which includes a first support horizontal plate 2101, a second support horizontal plate 2102, and a third support horizontal plate 2103 arranged sequentially from top to bottom. The third support horizontal plate 2103 is attached to the base 1. The left ends of the first support horizontal plate 2101 and the second support horizontal plate 2102 are fixedly connected by a first support vertical plate, and the right ends of the second support horizontal plate 2102 and the third support horizontal plate 2103 are fixedly connected by a second support vertical plate. Sliding grooves are respectively opened on the right ends of the opposite sides of the first support horizontal plate 2101 and the second support horizontal plate 2102, and sliding grooves are respectively opened on the left ends of the opposite sides of the second support horizontal plate 2102 and the third support horizontal plate 2103. Baffles 22 are slidably connected in both sliding grooves. Counterweights 23 are placed between the first support horizontal plate 2101 and the second support horizontal plate 2102, and between the second support horizontal plate 2102 and the third support horizontal plate 2103.

[0031] Several counterweights 23 are distributed within a cavity formed between the first support plate 2101 and the second support plate 2102, and within a cavity formed between the second support plate 2102 and the third support plate 2103. This ensures that the total weight of the counterweights 23 can be contained within the entire counterweight assembly, while reducing the number of counterweights 23 in each cavity. Therefore, when the baffle 22 is pulled out, a large number of counterweights 23 will not roll out at once, reducing safety hazards. In this embodiment, the counterweights 23 can specifically be made of discarded steel bars, steel plates, iron blocks, etc., which can be selected by the construction personnel according to the site conditions.

[0032] Preferably, a movable seat 24 is welded to the bottom of the third support plate 2103, and a rolling assembly 25 is installed on the movable seat 24; the base 1 is provided with mounting holes corresponding to the movable seat 24. The rolling assembly 25 includes an outer cylinder 2501 fixedly connected to the movable seat 24 and an inner cylinder 2502 slidably disposed in the outer cylinder 2501. The bottom and top of the inner cylinder 2502 are provided with rotating wheels; the top of the movable seat 24 is provided with a sliding groove, and a top plate 26 is slidably connected in the sliding groove. The bottom surface of the top plate 26 is provided with a storage cavity 28 for storing the rotating wheels; when the rotating wheel at the top of the inner cylinder 2502 abuts against the bottom surface of the top plate 26 and is located outside the storage cavity 28, the rotating wheel at the bottom of the inner cylinder 2502 is in contact with the ground, and the counterweight frame 21 as a whole can move through the rotating wheel at the bottom of the inner cylinder 2502; when the rotating wheel at the top of the inner cylinder 2502 is stored in the storage cavity 28, the counterweight frame 21 sits on the frame. The top plate 26 has multiple positioning holes, and the movable seat 24 is threaded with positioning bolts 27 for insertion into the positioning holes. The outer wall of the inner cylinder 2502 is provided with an anti-detachment ring platform 2504, and the top and bottom of the inner wall of the outer cylinder 2501 are provided with limiting plates 2503 to prevent the anti-detachment ring platform 2504 from sliding out.

[0033] Furthermore, in this embodiment, the longitudinal section of the movable seat 24 has a U-shaped or I-shaped structure. The frame includes several spaced horizontal sections and several connecting sections connecting the horizontal sections. The width of the movable seat 24 is smaller than the spacing between the horizontal sections, which facilitates the movement of the movable seat 24 in and out.

[0034] When using the counterweight assembly 2, first move the counterweight frame 21 after the rolling assembly 25 is pushed out onto the base 1. Then place the counterweight 23 between the first support plate 2101 and the second support plate 2102 of the counterweight frame 21, and between the second support plate 2102 and the third support plate 2103. Then insert the baffle 22 to prevent the counterweight 23 from sliding out. Next, move the top plate 26 until the roller at the top of the rolling assembly 25 slides into the receiving cavity 28 of the top plate 26, thereby pressing the bottom of the third support plate 2103 of the counterweight frame 21 onto the base 1, thereby increasing the weight of the rear end of the entire device and preventing the device from tilting after the tower crane section 7 is installed.

[0035] When using this device, the tower crane section 7 is first fixed to the right side of the rotating plate 5 of the rotating mechanism with bolts. The hydraulic cylinder is activated, and the extension and retraction of the hydraulic telescopic rod 3 drives the rotating support plate 4 to rotate at a large angle around the bottom hinge point, thereby adjusting the tower crane section 7 to a suitable tilted or vertical position for maintenance. Then, the stepper motor is activated, and the rotating plate 5 and tower crane section 7 are driven circumferentially by the belt 6, achieving full exposure of all surfaces of the tower crane section 7, facilitating inspection, cleaning, corrosion protection, and bolt tightening. The counterweight assembly 2 can be flexibly increased or decreased according to the actual load to balance the torque generated during the rotation and flipping process, ensuring the stability of the entire machine. When the device needs to be moved, the rolling assembly 25 is adjusted so that the top wheel of the inner cylinder 2502 disengages from the storage cavity 28 of the top plate 26, and the bottom wheel contacts the ground, allowing the counterweight frame 21 and the entire machine to move. During operation, the wheels are retracted, allowing the counterweight frame 21 to sit securely on the base 1.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A tower crane structural auxiliary maintenance device, characterized in that: Includes a frame, on which a tilting mechanism is provided, and a rotating mechanism is connected to the tilting mechanism, which is used to connect the tower crane section (7). The flipping mechanism includes a hydraulic cylinder and a rotating support plate (4). The hydraulic cylinder is fixedly installed on the machine base (1). The left side of the rotating support plate (4) is hinged to the end of the hydraulic telescopic rod (3) of the hydraulic cylinder. The right side of the rotating support plate (4) is rotatably connected to the rotating mechanism. The bottom of the rotating support plate (4) is hinged to the machine frame. The rotating mechanism includes a rotating plate (5) that is rotatably connected to the rotating support plate (4) via a rotating shaft. The right side of the rotating plate (5) is used to bolt and fix the tower crane section (7). A stepper motor is fixedly installed on the base (1). The stepper motor is connected to the rotating plate (5) for transmission and is used to drive the rotating plate (5) to rotate. A counterweight assembly (2) is also installed on the base (1); The counterweight assembly (2) includes a counterweight frame (21), which includes a first support plate (2101), a second support plate (2102) and a third support plate (2103) arranged sequentially from top to bottom. The third support plate (2103) overlaps the base (1). The left ends of the first support horizontal plate (2101) and the second support horizontal plate (2102) are fixedly connected by the first support vertical plate. The right ends of the second support horizontal plate (2102) and the third support horizontal plate (2103) are fixedly connected by the second support vertical plate. Slide grooves are respectively opened on the right ends of the opposite sides of the first support horizontal plate (2101) and the second support horizontal plate (2102). Slide grooves are respectively opened on the left ends of the opposite sides of the second support horizontal plate (2102) and the third support horizontal plate (2103). Baffles (22) are slidably connected in both slide grooves. Counterweights (23) are placed between the first support horizontal plate (2101) and the second support horizontal plate (2102) and between the second support horizontal plate (2102) and the third support horizontal plate (2103). The bottom of the third support plate (2103) is welded with a movable seat (24), and a rolling assembly (25) is installed on the movable seat (24); the base (1) is provided with mounting holes corresponding to the movable seat (24); The rolling assembly (25) includes an outer cylinder (2501) fixedly connected to the moving seat (24) and an inner cylinder (2502) slidably disposed in the outer cylinder (2501). The bottom and top of the inner cylinder (2502) are provided with rotating wheels. The top of the moving seat (24) is provided with a sliding groove, and a top plate (26) is slidably connected in the sliding groove. The bottom surface of the top plate (26) is provided with a storage cavity (28) for storing the rotating wheels. When the rotating wheel at the top of the inner cylinder (2502) abuts against the bottom surface of the top plate (26) and is located outside the storage cavity (28), the rotating wheel at the bottom of the inner cylinder (2502) contacts the ground, and the counterweight frame (21) as a whole can move through the rotating wheel at the bottom of the inner cylinder (2502). When the rotating wheel at the top of the inner cylinder (2502) is stored in the storage cavity (28), the counterweight frame (21) sits on the frame.

2. The auxiliary maintenance device for tower crane structure according to claim 1, characterized in that: The transmission connection structure between the stepper motor and the rotating plate (5) is as follows: a wheel seat is provided on the base (1), a central shaft is rotatably connected on the wheel seat, and a drive wheel is connected on the central shaft; the output shaft of the stepper motor is fixedly connected to the central shaft, and an annular groove is provided on the left side of the rotating plate (5), and the same belt (6) is sleeved on the annular groove and the drive wheel.

3. The auxiliary maintenance device for tower crane structure according to claim 1, characterized in that: Multiple positioning holes are provided on the top plate (26), and positioning bolts (27) for insertion into the positioning holes are threaded on the movable seat (24).

4. The auxiliary maintenance device for tower crane structure according to claim 1, characterized in that: An anti-detachment ring platform (2504) is provided on the outer wall of the inner cylinder (2502), and a limiting plate (2503) is provided at the top and bottom of the inner wall of the outer cylinder (2501) to prevent the anti-detachment ring platform (2504) from sliding out.

5. The auxiliary maintenance device for tower crane structure according to claim 1, characterized in that: The longitudinal section of the movable seat (24) is a C-shaped structure or an I-shaped structure.

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