Jacking anti-falling device of tower crane

Abstract

The utility model relates to the field of tower crane machinery, and discloses a tower crane jacking anti-falling device which comprises a jacking cross beam and a jacking step fixed on a main chord member of a tower crane body, a transverse limiting hole is formed in the middle of the jacking step, and an arc-shaped groove is formed in the top end of the jacking step; buckle plate boxes are fixed to the two ends of the jacking cross beam, the front sides and the rear sides of the buckle plate boxes are open, buckle plates are arranged at the tops of the buckle plate boxes, arc-shaped buckle blocks protruding downwards are arranged on the bottom faces of the buckle plates, through holes located below the arc-shaped buckle blocks are formed in the side walls, facing the middle of the jacking cross beam, of the buckle plate boxes, and transverse guide sleeves are arranged at the tops of the two ends of the jacking cross beam; and a pin shaft is arranged in the guide sleeve in a penetrating manner and is coaxially aligned with the via hole. The anti-falling device can solve the problems that an existing anti-falling device for the jacking cross beam of the tower crane is single in structure, the step supporting positions matched with the two ends of the jacking cross beam are in an open-type circular arc shape, reliable constraint is lacked, and potential safety hazards exist in the jacking or descending operation process of the tower crane.

Description

Technical Field

[0001] This utility model relates to the field of tower crane machinery, specifically to a tower crane lifting anti-detachment device. Background Technology

[0002] The lifting and dismantling of self-erecting tower cranes are critical safety aspects. Accidents during these processes can easily lead to significant losses of life and property. A major cause of these accidents is the lack of a reliable anti-detachment device on the lifting beam. GB5144-2006 "Safety Regulations for Tower Cranes" stipulates in section 6.11, "Anti-detachment function of the lifting beam," that "self-erecting tower cranes should have the function of preventing the lifting beam from detaching from the tower support during normal section addition and dismantling operations."

[0003] Traditional tower crane lifting beam anti-detachment devices are relatively simple, and the step supports that cooperate with both ends of the lifting beam are usually open arc-shaped, lacking reliable restraint, which poses a great safety hazard during tower crane lifting or lowering operations. Utility Model Content

[0004] This utility model aims to provide a tower crane lifting anti-detachment device to solve the problem that the existing tower crane lifting beam anti-detachment device has a simple structure and the step support at both ends of the lifting beam is an open arc shape, which lacks reliable restraint and poses a safety hazard during the tower crane lifting or lowering operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tower crane lifting anti-detachment device, comprising a lifting beam and lifting steps fixed to the main chord of the tower crane tower body. The lifting steps are plate-shaped, with a transverse limiting hole in the middle and an arc-shaped groove at the top. Both ends of the lifting beam are fixed with snap-on boxes, which have openings on their front and rear sides. The top of the snap-on box is a snap-on plate, and the bottom surface of the snap-on plate has a downward-protruding arc-shaped snap-on block. A through hole located below the arc-shaped snap-on block is opened on the side wall of the snap-on box facing the middle of the lifting beam. The distance between the axis of the through hole and the center of the arc-shaped snap-on block is equal to the distance between the axis of the limiting hole and the center of the arc-shaped groove. A transverse guide sleeve is provided at the top of both ends of the lifting beam, and a pin passes through the guide sleeve, with the pin coaxially aligned with the through hole.

[0006] Preferably, as an improvement, the pin is provided with a handle.

[0007] Preferably, as an improvement, a limit plate is fixed to the top of the lifting beam at the pin side end.

[0008] Preferably, as an improvement, the end of the pin opposite to the side of the buckle box is fixed with an end plate.

[0009] The principle and advantages of this solution are as follows: In practical application, the lifting step serves as the support point for fixing the lifting beam to the tower body. The lifting step and the lifting beam are connected by a buckle box covering the lifting step, which in turn supports the lifting beam. Initial anti-detachment and limiting are achieved through the engagement of the arc-shaped groove and the arc-shaped buckle block. Then, the handle pushes the pin along the guide sleeve into the buckle box, the through hole of the lifting step, and the limiting hole, further connecting the lifting beam and the lifting step, thus further limiting and preventing detachment of the lifting beam. A limiting plate provides auxiliary guidance and limitation to the pin from the side, offering some protection. Simultaneously, the limiting plate and the end plate at the end of the pin restrict and position the axial advance distance of the pin. When the end plate abuts against the limiting plate, it indicates that the pin has effectively entered the limiting hole, achieving anti-detachment. This allows for a more convenient, quick, and effective judgment of whether the anti-detachment operation has been completed during operation. In this way, the lifting beam is limited and prevented from detaching once by the fastening plate and the lifting step, and the lifting beam is limited and prevented from detaching a second time by the pin and the lifting step. The double anti-detachment ensures that the lifting beam is reliably constrained, effectively reducing the safety risk of the lifting beam falling off during the tower crane's lifting or lowering operations. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0011] Figure 2 This is a schematic diagram of the connection between the buckle box and the lifting step in an embodiment of the present utility model.

[0012] Figure 3 This is a schematic diagram showing the connection between the lifting beam and the main chord of the tower crane in an embodiment of this utility model. Detailed Implementation

[0013] The following detailed description illustrates the specific implementation method:

[0014] The reference numerals in the accompanying drawings of the instruction manual include: 1. Tower crane main chord, 2. Lifting beam, 3. End plate, 4. Handle, 5. Pin, 6. Guide sleeve, 7. Buckle box, 8. Lifting step, 9. Opening, 10. Limiting plate, 11. Arc-shaped buckle block, 12. Arc-shaped groove.

[0015] The basic implementation examples are as follows: Figure 1 , Figure 2As shown: A tower crane lifting anti-detachment device includes a lifting beam 2 and a lifting step 8 welded and fixed to the main chord of the tower crane tower body. The lifting step 8 is plate-shaped, with a transverse limiting hole in the middle and an arc-shaped groove 12 at the top. A snap-on box 7 is welded and fixed to both ends of the lifting beam 2. The snap-on box 7 is rectangular, with openings 9 on its front and rear sides, which are in the width direction of the lifting beam 2. The width of the openings 9 is greater than the thickness of the lifting step 8, and the height of the openings 9 is greater than the vertical length of the lifting step 8. The top of the snap-on box 7 is a snap plate, and the bottom surface of the snap plate has a downwardly protruding arc-shaped snap block 11, the arc of which is the same as the arc of the arc-shaped groove 12. A through hole is provided on the side wall of the snap-on box 7 facing the middle of the lifting beam 2, located below the arc-shaped snap block 11. The distance between the axis of the through hole and the center of the arc-shaped snap block 11 is equal to the distance between the axis of the limiting hole and the center of the arc-shaped groove 12. A transverse guide sleeve 6 is welded to the top of both ends of the lifting beam 2. A pin 5 passes through the guide sleeve 6, and a handle 4 is provided on the pin 5. The pin 5 is coaxially aligned with the through hole. A limiting plate 10 is welded to the top of the lifting beam 2 at the side end of the pin 5, and an end plate 3 is welded to the end of the pin 5 facing away from the snap-on box 7.

[0016] The specific implementation process is as follows: During the tower crane jacking process, the jacking beam 2 is lifted by hydraulic cylinders, combined with... Figure 3 As shown, the lifting beam 2 is moved so that the buckle boxes 7 at both ends are fastened to the lifting steps 8 of the main chord of the tower crane 1 from the side. The lifting steps 8 enter through the opening 9 of the buckle box 7, and the arc-shaped buckle block 11 is inserted into the arc-shaped groove 12. In this way, the lifting beam 2 achieves initial lifting support through the connection between the buckle box 7 and the lifting steps 8, and has a certain anti-detachment effect. Then, manually operate the pins 5 at both ends of the lifting beam 2. Push the pins 5 into the buckle box 7 through the handle 4 until the end plate 3 of the pin 5 abuts against the limiting plate 10. At this time, the pin 5 passes through the guide sleeve 6, the through hole and enters the limiting hole. The pin 5 connects the lifting beam 2, the buckle box 7 and the lifting step 8. In this way, the connection between the lifting beam 2 and the tower crane main chord 1 is further strengthened on the basis of the connection between the buckle box 7 and the lifting step 8, and the anti-detachment effect of the lifting beam 2 is further improved. It can not only bear the weight of the upper part of the climbing frame during lifting, but also effectively fix the lifting beam 2. The structure of this device is simple and increases the safety and reliability during the lifting and lowering operation.

[0017] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tower crane lifting anti-detachment device, characterized in that: The system includes a lifting beam and lifting steps fixed to the main chord of the tower crane. The lifting steps are plate-shaped with a transverse limiting hole in the middle and an arc-shaped groove at the top. Both ends of the lifting beam are fixed with snap-on boxes. The snap-on boxes have openings on the front and rear sides, with a snap-on plate at the top and a downward-protruding arc-shaped snap-on block on the bottom surface. A through hole is located below the arc-shaped snap-on block on the side wall of the snap-on box facing the middle of the lifting beam. The distance between the axis of the through hole and the center of the arc-shaped snap-on block is equal to the distance between the axis of the limiting hole and the center of the arc-shaped groove. The tops of both ends of the lifting beam are provided with transverse guide sleeves, with pins passing through them and aligned coaxially with the through holes.

2. The tower crane lifting anti-detachment device according to claim 1, characterized in that: A handle is provided on the pin.

3. The tower crane lifting anti-detachment device according to claim 2, characterized in that: A limit plate is fixed to the top of the lifting beam at the side end of the pin shaft.

4. The tower crane lifting anti-detachment device according to claim 3, characterized in that: An end plate is fixed to the end of the pin that is away from the buckle box.

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