Tower crane jacking cross beam safety device

Abstract

The utility model discloses a safety device for a jacking cross beam of a tower crane, which is characterized in that a group of safety pin in-place devices are respectively and symmetrically distributed at the upper and lower positions of the left and right sides of the jacking cross beam, and when the tower crane is jacked to different positions, a worker can respectively operate the upper and lower groups of safety devices on the upper and lower layer platforms of a climbing frame. Meanwhile, the safety pin is adjustable, a guide rail is arranged on the mounting base, the safety pin can be located at different positions, when the jacking beam does not need to be locked, the safety pin is located at the initial position, at the moment, the safety pin is completely located on the inner side of the mounting base of the jacking beam, and other operations are not affected. When the jacking cross beam needs to be locked, the safety pin is shifted to a designated position to be matched with the limiting plate on the upper side of the standard knot, and locking is completed. The device can effectively prevent overturning and falling accidents possibly occurring in the jacking process, and the safety of operators and equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of safety monitoring of lifting machinery, in particular to a safety device for lifting a crossbeam of a tower crane. Background Art

[0002] With the rapid development of the construction industry, tower cranes (tower cranes) play a vital role in the construction process. The lifting beam is connected to the main cylinder to provide support for the cylinder during the lifting and sectioning. When the tower crane is lifting and adding sections, the lifting beam is extended or shortened by the cylinder to achieve the rise and fall of the tower body of the standard section, thereby achieving the introduction and withdrawal of the tower crane standard section. However, there are certain safety risks in the use of tower cranes, especially during jacking operations.

[0003] The existing traditional tower crane lifting beam needs to be fixed when not in use to prevent it from sliding out and causing safety accidents. The field of engineering machinery requires safety devices to be easy to adjust and maintain. Conventional safety devices weld a safety pin mounting plate on the side of the lifting beam, drill a hole in the plate, and process a safety pin mounting hole that matches the lifting beam on the standard section or foundation section step, thereby achieving the connection and fixation of the lifting beam and the tower body. Traditional safety devices use a single-position and single-hole method, and the staff needs to install the safety pin from the side. Due to changes in the position of the lifting beam during manufacturing and actual use, the safety pin is difficult to install and remove. At the same time, when the cross-section of a single standard section of a large tower crane becomes higher, the personnel operating platform is too far away from the safety pin or it is inconvenient to operate.

[0004] Traditional safety devices such as Figure 1 As shown. The use process of the safety device is as follows: First, the jacking beam 1 completes the lifting section under the action of the hydraulic cylinder, and the jacking operation is completed. At this time, the jacking beam is located on the step 5, and the staff stands on the outer platform to pass the safety pin 3 through the installation hole on the step, and hammer the safety pin into the hole of the limit plate 4. This installation method is suitable for some small models, but for extra-large models, the safety pin may not be installed smoothly due to manufacturing precision and actual working conditions, and it is difficult to disassemble. When the jacking beam is located at the upper and lower step positions, the staff is too far away from the step, and it is inconvenient to install and remove the safety pin from the side, and a separate platform needs to be built, which is costly and inefficient. Utility Model Content

[0005] Purpose of the utility model: Aiming at the potential safety hazards in tower crane lifting operations, a new tower crane lifting beam safety device is designed to effectively prevent accidents, so as to improve the safety of lifting operations and prevent safety accidents caused by beam overturning. The device has the characteristics of simple structure, convenient operation and low cost, and can meet the actual needs of the construction site.

[0006] Technical solution: To achieve the purpose of the utility model, the technical solution adopted by the utility model is: a tower crane lifting beam safety device, including a standard section 1, an upper limit plate 2, a lower limit plate 3, a platform 4, a step 5, a lifting beam 6, a hydraulic cylinder connecting ear plate 7, an upper safety pin positioning device 8, a lower safety pin positioning device 9, a mounting seat ear plate 10, a safety pin 11, a guide tube 12 and a guide bolt 13; the upper limit plate 2 and the lower limit plate 3 are welded at the upper and lower positions of the standard section 1; the lifting beam 6, a plurality of steps 5 and the platform 4 are all located on the standard section 1, and the top The lifting beam 6 falls onto the step 5 through the lifting and lowering action of the ear plate 7 connected by the hydraulic cylinder; a group of upper safety pin positioning devices 8 and lower safety pin positioning devices 9 are symmetrically distributed at the upper and lower positions on the left and right sides of the lifting beam 6; the upper safety pin positioning device 8 and the lower safety pin positioning device 9 are respectively provided with a mounting seat ear plate 10, a safety pin 11 and a guide tube 12; the safety pin 11 is adjustable and is installed inside the guide tube 12 through the mounting seat ear plate 10. The guide tube 12 has a guide groove, and a guide bolt 13 is installed in the guide groove for the safety pin 11 to slide and limit along the guide groove.

[0007] Preferably, the limiting holes of the two limiting plates adopt a U-shaped structure.

[0008] Preferably, the guide groove on the guide tube 12 is in a C-shaped structure.

[0009] Preferably, the depth of the C-shaped guide groove is greater than twice the diameter of the safety pin.

[0010] Preferably, the angle of the C-shaped guide groove is greater than 60° when the safety pin is placed vertically.

[0011] Preferably, when the lifting beam 6 is located on the step 5 on the upper side of the standard section 1 , the staff is located on the platform 4 on the upper side of the standard section 1 to perform operations.

[0012] Preferably, when the lifting beam 6 is located on the step 5 at the lower side of the standard section 1 , the staff is located on the platform 4 at the lower side of the standard section 1 to perform operations.

[0013] Preferably, guide rails are provided on the upper safety pin positioning device 8 and the lower safety pin positioning device 9 respectively, and the safety pin 11 is installed inside the guide tube 12 through the guide rails.

[0014] Beneficial effects: Compared with the prior art, the technical solution of the utility model has the following beneficial technical effects:

[0015] Aiming at the potential safety hazards existing in the tower crane lifting operation, the utility model proposes a new tower crane lifting beam safety device that can effectively prevent accidents, which not only improves the safety of tower crane operation, but also has good economy and practicality. The design and application of this device are of great significance for promoting the development of construction safety technology and reducing the accident rate at the construction site. This device has the characteristics of simple structure, convenient operation and low cost. At the same time, it can meet the actual needs of the construction site, effectively solve the problem of the difficulty in installing and disassembling the lifting beam of large machines, and greatly improve the safety, stability and reliability during the installation and disassembly process. The design and application of this device are of great significance for promoting the development of construction safety technology and reducing the accident rate at the construction site. In addition, it also provides new ideas and references for the safety design of similar engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram of the traditional safety device structure.

[0017] Figure 2 It is a schematic diagram of the standard section structure of the device of the utility model.

[0018] Figure 3 It is a schematic diagram of the lifting beam structure of the device of the utility model.

[0019] Figure 4 This is a schematic diagram of the workers on the platform under the jacking beam.

[0020] Figure 5 This is a schematic diagram of the workers on the platform above the jacking beam.

[0021] Figure 6 It is a schematic diagram of different positions of safety devices.

[0022] Among them, 1-standard section, 2-upper limit plate, 3-lower limit plate, 4-platform, 5-step, 6-lifting beam, 7-hydraulic cylinder connecting ear plate, 8-upper safety pin positioning device, 9-lower safety pin positioning device, 10-mounting seat ear plate, 11-safety pin, 12-guide tube, 13-guide bolt. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] The utility model proposes a novel lifting beam safety device, the structure of which is as follows Figure 2As shown. The structure includes a standard section 1, an upper limit plate 2, a lower limit plate 3, a platform 4, a step 5, a lifting beam 6, a hydraulic cylinder connecting ear plate 7, an upper safety pin positioning device 8, a lower safety pin positioning device 9, a mounting seat ear plate 10, a safety pin 11, a guide tube 12 and a guide bolt 13. The upper limit plate 2 and the lower limit plate 3 are welded at the upper and lower positions of the standard section 1, and the limit holes of the two limit plates should adopt a U-shaped structure. The lifting beam 6 is located on the step 5 on the upper side of the standard section 1 to avoid safety hazards caused by the safety pin 11 being unable to be inserted into the holes of the upper and lower limit plates when the lifting beam is in different positions and errors occur during the production process. When the lifting beam 6 falls on the lower step 5 under the lifting action of the hydraulic cylinder connecting ear plate 7, after the single lifting and adding section operation is completed, the staff should be located on the platform 4 to operate the upper safety pin positioning device 8 and the lower safety pin positioning device 9. When the lifting beam 6 is located on the upper step 5, the staff is located on the upper platform 4 of the standard section 1 to operate; when the lifting beam 6 is located on the lower step 5, the staff is located on the lower platform 4 of the standard section 1 to operate, as shown in the schematic diagram. Figure 4 and Figure 5 shown.

[0025] The safety pin 11 is installed in advance inside the guide tube 12. The guide tube 12 has a guide groove. The guide groove is a C-shaped structure, which can allow the guide bolt 13 to slide along the guide groove and be locked in position. The staff can control the guide bolt 13 to achieve the forward and backward movement of the safety pin 11, so that it is locked when needed and located inside the lifting beam 6 when not needed, without affecting other operations, such as Figure 6 shown. Figure 6 (a) is when it is not working, the safety pin 11 is located inside the positioning device, Figure 6 (b) in the figure means that the safety pin 11 passes through the upper limit plate of the standard section during operation. During the structural design process, the C-shaped guide groove should ensure that the safety pin and the guide bolt can be automatically locked under the action of gravity to prevent the safety pin from accidentally sliding out. Therefore, the angle and depth of the C-shaped guide groove should be strictly controlled. The depth of the guide groove should be greater than 2 times the diameter of the safety pin, and the angle should be greater than 60° when the safety pin is placed vertically.

[0026] The utility model of the jacking beam safety device has a set of upper safety pin positioning devices and lower safety pin positioning devices symmetrically distributed at the upper and lower positions on the left and right sides of the jacking beam. When the tower crane is jacked to different positions, the staff can operate the upper and lower safety pin positioning devices respectively on the upper and lower platforms of the climbing frame. At the same time, the safety pin is made adjustable, and a guide rail is set on the mounting seat. The safety pin can be located in different positions. When the jacking beam does not need to be locked, the safety pin is in the initial position. At this time, the safety pin is completely located inside the jacking beam safety pin positioning device, such as Figure 6As shown in (b), it does not affect other operations. When the lifting beam needs to be locked, move the safety pin to the specified position and cooperate with the upper limit plate of the standard section to complete the locking. This device can effectively prevent overturning and falling accidents that may occur during the lifting process, ensuring the safety of operators and equipment. The positional relationship between the standard section, lifting beam, steps and personnel operating platform should be focused on during design. While the structure meets the use requirements, it is also necessary to consider whether the staff can install and remove the safety pin conveniently, safely and efficiently. During the structural design process, the C-shaped guide groove of this device can automatically lock the safety pin and guide bolt under the action of gravity to prevent the safety pin from accidentally slipping out. During the installation process, the safety pin must be placed inside the guide tube first. The staff should reasonably select the safety pin and work platform according to the different positions of the lifting beam during lifting.

Claims

1. A tower crane lifting beam safety device, characterized in that: The device comprises a standard section (1), an upper limit plate (2), a lower limit plate (3), a platform (4), a step (5), a lifting beam (6), a hydraulic cylinder connecting ear plate (7), an upper safety pin positioning device (8), a lower safety pin positioning device (9), a mounting seat ear plate (10), a safety pin (11), a guide tube (12) and a guide bolt (13); An upper limit plate (2) and a lower limit plate (3) are welded at the upper and lower positions of the standard section (1); The lifting beam (6), a plurality of steps (5) and the platform (4) are all located on the standard section (1), and the lifting beam (6) is lowered onto the step (5) by the lifting section connected to the ear plate (7) by a hydraulic cylinder; A set of upper safety pin positioning devices (8) and lower safety pin positioning devices (9) are symmetrically distributed at upper and lower positions on the left and right sides of the jacking beam (6); The upper safety pin positioning device (8) and the lower safety pin positioning device (9) are respectively provided with a mounting seat ear plate (10), a safety pin (11) and a guide tube (12); The safety pin (11) is adjustable and is installed inside the guide tube (12) through the mounting seat ear plate (10). The guide tube (12) is provided with a guide groove, and a guide bolt (13) is installed in the guide groove for the safety pin (11) to slide along the guide groove and limit the position.

2. A tower crane lifting beam safety device according to claim 1, characterized in that: The limiting holes of the two limiting plates adopt a U-shaped structure.

3. A tower crane lifting beam safety device according to claim 1, characterized in that: The guide groove formed on the guide tube (12) is in a C-shaped structure.

4. A tower crane lifting beam safety device according to claim 3, characterized in that: The depth of the C-shaped guide groove is greater than twice the diameter of the safety pin.

5. A tower crane lifting beam safety device according to claim 3, characterized in that: The angle of the C-shaped guide groove is greater than 60° when the safety pin is placed vertically.

6. A tower crane lifting beam safety device according to claim 1, characterized in that: When the lifting beam (6) is located on the step (5) on the upper side of the standard section (1), the staff is located on the platform (4) on the upper side of the standard section (1) to operate.

7. A tower crane lifting beam safety device according to claim 1, characterized in that: When the lifting beam (6) is located at the step (5) at the lower side of the standard section (1), the staff operates on the platform (4) at the lower side of the standard section (1).

8. A tower crane lifting beam safety device according to any one of claims 1 to 7, characterized in that: Guide rails are respectively arranged on the upper safety pin positioning device (8) and the lower safety pin positioning device (9), and the safety pin (11) is installed inside the guide tube (12) through the guide rails.

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