Rope falling prevention device of crane

Abstract

The utility model relates to the technical field of rope falling prevention devices, in particular to a rope falling prevention device of a crane, which solves the problems mentioned in the background technology and comprises a fixed frame, a rotating shaft is arranged in the fixed frame, a plurality of pulleys are mounted on the rotating shaft, adjacent pulleys are contacted with each other, and a connecting frame is arranged above the pulleys. A blocking cover corresponding to the top of the pulley is arranged on the connecting frame and used for preventing the steel wire rope from sliding out of the pulley, the multiple protection mode that the blocking cover and a blocking piece are combined is adopted, and the blocking cover is located above the pulley, is semicircular and matched with the pulley and can directly cover and block the steel wire rope on the pulley and prevent the steel wire rope from sliding out from the upper portion. The bottom blocking piece plays a role in blocking the steel wire rope from being disengaged from the side face of the pulley. By means of the vertically-combined protection structure, the risk that the steel wire rope is disengaged from the pulley rope groove is greatly reduced, breakage and safety accidents caused by disengagement of the steel wire rope are effectively avoided, and the safety of crane operation is guaranteed in an all-around mode.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-rope slippage devices, specifically an anti-rope slippage device for cranes. Background Technology

[0002] With the rapid development of the construction industry, tower cranes are being used more and more widely. As a special type of equipment, their safety protection devices are particularly important. How to ensure their functionality while effectively reducing costs (including their own costs and operating costs) and achieving the highest performance-price-function ratio is the current development need.

[0003] The anti-derailment safety device for the luffing trolley of a tower crane is an important safety protection device. Its main function is to prevent the wire rope from slipping out of the pulley groove, causing the wire rope to break and thus leading to an accident. Many uncertainties exist during tower crane operation. Although anti-derailment safety devices are installed, the wire rope can still slip out of the groove. Excessive lateral swing of the hook, sudden unloading of the tower crane, significant impact on the working mechanism, and improper operation, such as oblique pulling, can all cause the wire rope to slip out of the groove. While existing technology addresses this by welding baffles to the pulley frame...

[0004] The old-style anti-derailment device with baffle is fixed and the initial installation accuracy is difficult to control. Moreover, after installation, the gap between the anti-derailment baffle and the edge of the pulley cannot be adjusted (in most cases, the anti-derailment gap is relatively large and cannot effectively prevent the wire rope from slipping out of the groove). Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the existing technology, this utility model provides a crane anti-rope slippage device, which solves the problems mentioned in the background technology.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a crane anti-rope slippage device, including a fixed frame, a rotating shaft inside the fixed frame, multiple pulleys mounted on the rotating shaft, adjacent pulleys in contact with each other, a connecting frame above the pulleys, and a baffle corresponding to the top of the pulley on the connecting frame to prevent the wire rope from slipping off the pulley. Both ends of the connecting frame are rotatably connected to threaded assemblies threaded to the fixed frame to adjust the distance between the slippage and the baffle.

[0009] Furthermore, multiple baffles are connected to both sides of the bottom of the fixed frame, and the spacing between adjacent baffles corresponds to that of the pulleys.

[0010] Furthermore, the connecting frame includes a connecting plate, the bottom of which is connected to a plurality of connecting blocks that are respectively connected to the baffle.

[0011] Furthermore, the threaded assembly includes a bolt, the upper part of which is connected to a rotating block placed in the connecting plate and rotatably connected, and the fixed frame has a threaded hole that is threadedly connected to the bolt.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, this utility model provides a crane anti-rope slippage device, which has the following features:

[0014] Beneficial effects:

[0015] This crane's anti-rope slippage device employs a multi-layered protection system combining a shield and a baffle. The shield, located above the pulley and semi-circular in shape to match it, directly covers and blocks the wire rope on the pulley, preventing it from slipping out from above. The baffle at the bottom prevents the wire rope from slipping out from the side of the pulley. This combined upper and lower protective structure significantly reduces the risk of the wire rope slipping out of the pulley groove, effectively avoiding breakage and related safety accidents caused by wire rope slippage, and comprehensively ensuring the safety of crane operations.

[0016] Second, considering that there are many uncertainties during crane operation, such as excessive lateral swing of the hook, sudden unloading of the tower crane, and improper operation, which can easily lead to the wire rope going out of the groove, the multiple protective structures of this device can better cope with these complex working conditions. Even when the wire rope is subjected to a large impact or abnormal swing, it can reliably restrain it within the pulley range, ensuring the stability and reliability of the crane operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] In the diagram: 1. Fixed frame; 2. Rotating shaft; 3. Pulley; 4. Baffle; 5. Connecting frame; 6. Connecting plate; 7. Connecting block; 8. Threaded assembly; 9. Bolt; 10. Rotating block; 11. Baffle plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-2The present invention discloses a crane anti-rope detachment device, comprising a fixed frame 1, a rotating shaft 2 disposed inside the fixed frame 1, the two ends of the rotating shaft 2 being respectively connected to the corresponding inner walls of the fixed frame 1, and a plurality of pulleys 3 being installed on the rotating shaft 2, the adjacent pulleys 3 being in contact with each other, and the two end pulleys 3 being in contact with the inner walls of the fixed frame 1, so that the pulleys 3 cannot slide in the length direction of the rotating shaft 2.

[0022] A connecting frame 5 is provided above the pulley 3. The connecting frame 5 includes a connecting plate 6. The bottom of the connecting plate 6 is connected to multiple connecting blocks 7, each corresponding to the pulley 3. The bottom of each connecting block 7 is connected to a cover 4. The cover 4 is semi-circular and matches the pulley 3. It is used to cover the top of the pulley 3 and prevent the wire rope from detaching from the pulley 3.

[0023] The connecting plate 6 has mounting holes at both ends, in which threaded assemblies 8 are installed. Each threaded assembly 8 includes a bolt 9, and a rotating block 10, which is rotatably connected to the upper part of the bolt 9 and is placed in the mounting hole of the connecting plate 6, serves to limit the bolt 9 on the connecting plate 6. The fixing frame 1 has threaded holes that are threadedly connected to the bolt 9. By rotating the bolt 9, the distance between the retaining cover 4 and the pulley 3 changes, allowing the use of steel wire ropes of different thicknesses and preventing the steel wire rope from detaching from the pulley 3.

[0024] Multiple baffles 11 are connected to both sides of the bottom of the fixed frame 1. The spacing between adjacent baffles 11 corresponds to that of the pulley 3, which is used to prevent the wire rope from detaching from the pulley 3.

[0025] In summary, the anti-derailment device for this crane prevents the wire rope from detaching from the pulley 3 when the wire rope swings on the pulley 3. The guard 4 blocks the wire rope, and the baffle 11 also blocks the wire rope, thus preventing the wire rope from detaching from the pulley 3.

[0026] By rotating the bolt 9 on the connecting plate 6, the bolt 9 rotates in the fixed frame 1, causing the cover 4 on the connecting plate 6 to move upward, thereby creating a distance between the cover 4 and the pulley 3 to accommodate wire ropes of different thicknesses. The cover 4 also blocks the wire rope and restrains it on the pulley 3.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crane anti-rope slippage device, comprising a fixing frame (1), characterized in that: The fixed frame (1) is provided with a rotating shaft (2) inside, and multiple pulleys (3) are installed on the rotating shaft (2). Adjacent pulleys (3) are in contact with each other. A connecting frame (5) is provided above the pulleys (3). A cover (4) corresponding to the top of the pulley (3) is provided on the connecting frame (5) to prevent the wire rope from sliding off the pulley (3). Both ends of the connecting frame (5) are rotatably connected to the fixed frame (1) by a threaded assembly (8) to adjust the distance between the sliding and the cover (4).

2. The crane anti-derailment device according to claim 1, characterized in that: The bottom sides of the fixed frame (1) are connected to multiple baffles (11), and the spacing between adjacent baffles (11) corresponds to the pulley (3).

3. A crane anti-derailment device according to claim 1, characterized in that: The connecting frame (5) includes a connecting plate (6), and the bottom of the connecting plate (6) is connected to a plurality of connecting blocks (7) that are respectively connected to the baffle (4).

4. A crane anti-derailment device according to claim 3, characterized in that: The threaded assembly (8) includes a bolt (9), and the upper part of the bolt (9) is connected to a rotating block (10) placed in the connecting plate (6) and rotatably connected. The fixed frame (1) has a threaded hole that is threadedly connected to the bolt (9).

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