Cantilever crane anti-falling device for stopping hoisting equipment

Abstract

The utility model discloses a cantilever crane anti-falling device for stopping hoisting equipment. The cantilever crane anti-falling device of the stopped hoisting equipment comprises a propeller strut, the propeller strut is connected with a rope clamp through a connecting piece, and the rope clamp is used for clamping a plurality of sections of steel wire ropes formed when a variable amplitude steel wire rope winds around a propeller strut pulley block and a cantilever crane pulley block. The utility model solves the problems that when the seating crane is in a long-term stop stage, the corrosion condition of the variable-amplitude steel wire rope is difficult to perceive, and once the variable-amplitude steel wire rope is broken, the arm frame falls off, so that safety accidents are easy to occur.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, and particularly relates to an anti-falling device for the boom of a deactivated lifting equipment. Background Art

[0002] The luffing wire rope of a portal crane sequentially bypasses the sheave block of the A-frame and the sheave block of the boom, and the rise and fall of the boom is controlled by the retraction and release of the luffing wire rope. When the portal crane is in a long-term deactivated stage, the corrosion condition of the luffing wire rope is difficult to detect. Once it breaks, the boom will fall accordingly, and safety accidents are likely to occur. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an anti-falling device for the boom of a deactivated lifting equipment that can avoid safety accidents caused by the breakage of the luffing wire rope at a certain place.

[0004] To achieve the above purpose, the technical solution adopted by the anti-falling device for the boom of the deactivated lifting equipment of the utility model is as follows:

[0005] An anti-falling device for the boom of a deactivated lifting equipment, including an A-frame, the A-frame is connected with a wire rope clip through a connecting piece, and the wire rope clip is used for clamping multiple sections of wire ropes formed when the luffing wire rope bypasses the sheave block of the A-frame and the sheave block of the boom.

[0006] Preferably, the wire rope clip includes a bottom plate, both sides of the bottom plate are connected with the A-frame through a connecting piece, and a plurality of pressing plates are connected to the top surface of the bottom plate through bolts.

[0007] Preferably, a plurality of first grooves are formed on the top surface of the bottom plate, and a plurality of second grooves are formed on the bottom surface of the pressing plate. The first and second grooves cooperate to clamp multiple sections of wire ropes. The inner walls of the first and second grooves increase the contact area with multiple sections of wire ropes, improving the clamping firmness of multiple sections of wire ropes.

[0008] Preferably, the connecting piece is a seamless steel pipe, one end of the seamless steel pipe is connected with the A-frame, and the other end is connected with the bottom plate. The connecting piece can also be a chain.

[0009] Preferably, first ear plates are arranged at both ends of the seamless steel pipe, a plurality of shackles are connected to the first ear plates, second ear plates for connecting the shackles are arranged on the A-frame, and third ear plates for connecting the shackles are arranged on the bottom plate. The seamless steel pipe is respectively hinged to the bottom plate and the A-frame through shackles, with high degrees of freedom, avoiding the connection failure between the bottom plate and the A-frame caused by the luffing wire rope swaying with the wind, so as to improve safety.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] When the luffing wire rope winds between the pulley blocks of the boom support and the boom, each change in direction of the luffing wire rope forms a section. Therefore, multiple sections of wire ropes can be formed in two layers between the pulley blocks of the boom support and the boom. In this case, by clamping any layer of the multiple sections of wire ropes with a wire rope clip, as long as one section of the wire rope in this layer does not break, the boom support can pull the boom through the connecting piece, the wire rope clip, and the luffing wire rope, preventing the boom from falling and causing a safety accident. Description of the Drawings

[0012] Figure 1 is an application schematic diagram of the boom anti-falling device for the decommissioned lifting equipment of the present utility model;

[0013] Figure 2 is a schematic structural diagram of the connecting piece;

[0014] Figure 3 is a schematic structural diagram of the wire rope clip;

[0015] Figure 4 is a schematic structural diagram of the bottom plate;

[0016] Figure 5 is a schematic structural diagram of the pressing plate.

[0017] Among them, 1 is the boom support, 11 is the second ear plate, 2 is the connecting piece, 21 is the first ear plate, 22 is the shackle, 3 is the wire rope clip, 31 is the bottom plate, 311 is the first groove, 312 is the third ear plate, 32 is the bolt, 33 is the pressing plate, 331 is the second groove, 4 is the luffing wire rope, 5 is the pulley block of the boom support, and 6 is the pulley block of the boom. Detailed Embodiments

[0018] The present utility model will be further clarified below in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent modifications made by those skilled in the art to the present utility model fall within the scope defined by the appended claims of this application.

[0019] As Figures 1-5As shown in the figure, an anti-falling device for the boom of a deactivated hoisting equipment includes a derrick 1. The derrick is connected to a rope clip 3 through a connecting piece 2. The rope clip is used to clamp multiple sections of wire ropes formed when the luffing wire rope 4 bypasses the derrick pulley block 5 and the boom pulley block 6. The rope clip includes a bottom plate 31. The top surface of the bottom plate is connected to a number of pressing plates 33 through bolts 32. A number of first grooves 311 are formed on the top surface of the bottom plate. The number of the first grooves is determined according to the number of pulleys of the derrick pulley block. The spacing of the first grooves matches the center-to-center spacing between the multiple sections of wire ropes. Second grooves 331 are formed on the bottom surface of the pressing plate. The first and second grooves cooperate to clamp the multiple sections of wire ropes. The inner walls of the first and second grooves increase the contact area with the multiple sections of wire ropes, improving the clamping firmness of the multiple sections of wire ropes. The pressing plates are divided into small pieces, which can form multiple pressing points to further improve the clamping firmness of the multiple sections of wire ropes. The connecting piece is a seamless steel pipe. First ear plates 21 are welded to both ends of the seamless steel pipe. Two series-connected shackles 22 are installed on the first ear plates. Second ear plates 11 for connecting the shackles are welded on both sides of the derrick where the derrick pulley block is located. Third ear plates 312 for connecting the shackles are integrally formed on both sides of the bottom plate. The seamless steel pipe is respectively hinged to the bottom plate and the derrick through the shackles, with high degrees of freedom, avoiding the connection failure between the bottom plate and the derrick caused by the luffing wire rope swaying with the wind, so as to improve safety.

[0020] The specific working process and principle of the present utility model: The first ear plate at the lower side is connected to the second ear plate through a shackle, and the first ear plate at the upper side is connected to the third ear plate through a shackle, completing the connection between the bottom plate and the derrick. Then, the bottom plate and the pressing plate are used to clamp the outside of the multiple sections of wire ropes on the outer layer. During clamping, the multiple sections of wire ropes only need to be located between the corresponding first and second grooves. At this time, taking the rope clip as the demarcation point, the locked multiple sections of wire ropes are defined as six sections, namely a, b, c, d, e, and f. When section a breaks, the derrick pulls the rope clip through the connecting piece, and the rope clip can clamp the remaining sections. The luffing wire rope wound around the boom pulley block remains unchanged, that is, sections b, d, and f all act on the boom, avoiding the safety accident of the boom falling; when section b breaks, since section c is diverted from section b, the break of section b can be regarded as the break of section c. At this time, sections d and f act on the boom, avoiding the safety accident of the boom falling; when sections a, c, and e all break, there is still section f acting on the boom at this time, which can avoid the safety accident of the boom falling; therefore, as long as one of sections b, d, and f can act on the boom, the boom falling can be avoided, winning time for people to take remedial measures.

Claims

1. A boom anti-falling device for a decommissioned lifting equipment, comprising a herringbone frame, characterized in that: The herringbone frame is connected to a rope clamp through a connecting piece, and the rope clamp is used to clamp multiple sections of steel wire ropes formed when the luffing steel wire rope passes around the herringbone frame pulley block and the arm pulley block.

2. The boom anti-falling device for the decommissioned lifting equipment according to claim 1, characterized in that: The rope clamp comprises a bottom plate, two sides of the bottom plate are connected with the herringbone frame through connecting pieces, and the top surface of the bottom plate is connected with a plurality of pressing plates through bolts.

3. The boom anti-falling device for the decommissioned lifting equipment according to claim 2 is characterized in that: The top surface of the bottom plate is provided with a plurality of first grooves, the bottom surface of the pressing plate is provided with a second groove, and the first and second grooves cooperate to clamp a plurality of sections of steel wire ropes.

4. The boom anti-falling device for the decommissioned lifting equipment according to claim 2, characterized in that: The connecting piece is a seamless steel pipe, one end of which is connected to the herringbone frame, and the other end is connected to the bottom plate.

5. The boom anti-falling device for the decommissioned lifting equipment according to claim 4 is characterized in that: Both ends of the seamless steel pipe are provided with first ear plates, the first ear plates are connected with a plurality of shackles, the herringbone frame is provided with a second ear plate for connecting the shackles, and the bottom plate is provided with a third ear plate for connecting the shackles.

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