Anti-falling device for steel wire rope of fixed pulley of crane

Abstract

The utility model provides a crane fixed pulley steel wire rope anti-falling device, which belongs to the field of cranes and comprises at least one anti-falling support capable of being mounted on the outer side of a fixed pulley, a physical anti-falling mechanism is arranged on one side, facing the outer circumferential surface of the fixed pulley, of the anti-falling support, and at least one steel wire rope sensor is arranged on one side of the anti-falling support. The steel wire rope sensor can judge whether a steel wire rope exists in a groove formed in the outer circumferential face of the fixed pulley or not, and the steel wire rope sensor is electrically connected with a control switch of a lifting system of the crane. The anti-falling device has the beneficial effects that a certain steel wire rope anti-falling effect can be achieved, a lifting system of the crane can be timely reminded to perform shutdown treatment after a physical anti-falling structure fails, the abrasion of the fixed pulley plate, the fixed pulley middle shaft and the steel wire rope is reduced, and hoisting accidents are avoided.

Description

Technical Field

[0001] The utility model belongs to the field of cranes, and in particular relates to a crane fixed pulley wire rope anti-slip device. Background Art

[0002] A crane refers to a multi-action lifting machinery that can vertically lift and horizontally move heavy objects within a certain range. As an important tool and equipment for industrial, transportation, and construction companies to achieve mechanization and automation of production processes, reduce heavy physical labor, and improve labor productivity, it is widely used in industrial fields such as lifting of mining materials.

[0003] Currently, the hoisting system in a crane primarily consists of a hoist drum, hook, movable pulley, and wire rope. During crane lifting, the hoist drum uses the wire rope to pull the movable pulley and hook up and down, achieving the desired lift. However, over the long term, the wire rope can be susceptible to improper operation, such as skewing or tilting, causing abnormal vibration during the lifting process. This vibration can easily cause the wire rope to bounce inside the fixed pulley. If this vibration persists, it can eventually cause the wire rope to jump out of its groove at the fixed pulley.

[0004] Therefore, some cranes in the prior art are equipped with wire rope anti-slip devices. However, since most existing wire rope anti-slip devices only have a physical anti-slip structure with a fixed position, and lack a monitoring structure or a secondary protection structure after the physical anti-slip effect fails, if the staff fails to detect the wire rope being out of the groove in time and continues to operate the crane's hoisting system, it will accelerate the wear of the fixed pulley, the fixed pulley center shaft, and the wire rope, and may even directly cause the wire rope to break, thereby inducing serious lifting accidents, threatening the safety of personnel, and seriously interfering with the normal progress of the lifting operation. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a crane fixed pulley wire rope anti-slip device installed at the fixed pulley in the lifting system of the crane, so that it can not only play a certain effect of preventing the wire rope from falling off, but also can promptly remind the lifting system of the crane to shut down after the physical anti-slip structure fails, thereby reducing the wear of the fixed pulley, the fixed pulley center shaft and the wire rope, and avoiding the occurrence of lifting accidents.

[0006] In order to solve the above technical problems, the present invention provides a technical solution as follows: a crane fixed pulley wire rope anti-slip device, comprising at least one anti-slip bracket that can be installed on the outer side of the fixed pulley, a physical anti-slip mechanism provided on the anti-slip bracket on the side facing the outer circumference of the fixed pulley, and at least one wire rope sensor provided on one side of the anti-slip bracket, the wire rope sensor being capable of determining whether the wire rope is in a groove provided on the outer circumference of the fixed pulley, and the wire rope sensor being electrically connected to a control switch of a hoisting system of the crane. In this way, the device can achieve a certain physical anti-slip effect through the physical anti-slip mechanism, and can also monitor and determine whether the wire rope is in the corresponding groove in real time through the wire rope sensor, and promptly send a signal to the control switch of the hoisting system when the wire rope jumps out of the groove, so as to control the hoisting system to stop operation, thereby avoiding wear and tear of the fixed pulley, the fixed pulley center shaft and the wire rope due to the continuous operation of the hoisting system after the wire rope jumps out of the groove, and thus preventing equipment and personnel casualties.

[0007] Furthermore, the wire rope sensor is a laser sensor, and it mainly determines whether there is a wire rope in the groove provided on the outer circumference of the fixed pulley through the laser emitted by the laser sensor. Specifically, it can emit a laser beam to the corresponding groove position through the laser sensor, and then when this laser beam is irradiated to the corresponding groove position, it will return to the receiver of the laser sensor under the reflection of the corresponding object, and the light beam information returned when there is a wire rope in the groove and when there is no wire rope, is inconsistent. In this way, the laser sensor can determine whether there is a wire rope in the detection area based on the received light signal, and one laser sensor is responsible for a circle of grooves.

[0008] The cam is secured to the cam face by a spring which is secured to the cam face by a spring which is secured to the cam face when the cam is in a condition where the cam is pulled out of the cam and the rope is engaged with the cam.

[0009] Furthermore, the anti-slip spring is sleeved on the outside of the anti-slip screw.

[0010] Furthermore, all the anti-slip screws are fixedly connected to the same anti-slip component, or the end of each anti-slip screw is connected to an anti-slip component, as long as the anti-slip component can abut against the wire rope.

[0011] Furthermore, there are three anti-slip brackets, all of which are located above the fixed pulley, and the anti-slip bracket in the middle is located directly above the axis of the fixed pulley.

[0012] It can be seen from the above technical scheme that the utility model has the following advantages: it can not only achieve a certain physical anti-slip effect through the physical anti-slip mechanism, but also monitor and judge in real time through the wire rope sensor whether the wire rope is in the corresponding groove, and promptly send a signal to the control switch of the lifting system after the wire rope jumps out of the groove, so as to control the lifting system to stop running, thereby avoiding the fixed pulley, the fixed pulley center axis and the wire rope from being worn and scrapped due to the continuous operation of the lifting system after the wire rope jumps out of the groove, and the resulting equipment and personnel casualties; at the same time, compared with the anti-slip rod structure with a fixed position in the prior art, the utility model can also ensure that the anti-slip part can move a certain distance relative to the fixed pulley through the elastic physical anti-slip mechanism, thereby avoiding the wire rope from being cut by the anti-slip part and the pulley after the wire rope jumps out of the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the utility model Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of a specific embodiment of the utility model Figure 2 .

[0016] In the figure: 1. Wire rope sensor; 2. Anti-slip screw; 3. Anti-slip spring; 4. Anti-slip bracket; 5. Anti-slip part. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figures 1 to 2 As shown, the utility model provides a crane fixed pulley wire rope anti-slip device, which includes at least one anti-slip bracket 4 that can be installed on the outside of the fixed pulley, and when the number of the anti-slip brackets 4 is preferably three, the three anti-slip brackets 4 are all located above the upper half circle of the fixed pulley, and the anti-slip bracket 4 in the middle position is located directly above the axis of the fixed pulley.

[0019] A physical anti-slip mechanism is provided on the side of the anti-slip bracket 4 facing the outer circumference of the fixed pulley. The physical anti-slip mechanism includes a mounting hole provided on the anti-slip bracket 4, an anti-slip screw 2 passing through the mounting hole, an end of the anti-slip screw 2 away from the fixed pulley passing through the mounting hole and being threadedly connected to a locking nut, an end of the anti-slip bolt close to the fixed pulley passing through the mounting hole and being connected to an anti-slip part 5, the anti-slip part 5 is arranged opposite to the groove on the outer circumference of the fixed pulley, and an anti-slip spring 3 is provided between the anti-slip part 5 and the anti-slip bracket 4, which is retracted radially along the fixed pulley. The anti-slip spring 3 is sleeved It is arranged on the outside of the anti-slip screw 2, and the two ends of the anti-slip spring 3 are respectively against the anti-slip bracket 4 and the anti-slip part 5, so that when the wire rope bounces out of the groove, the anti-slip spring 3 and the anti-slip part 5 can cooperate to prevent the wire rope from falling out, eliminate the wire rope bouncing stress, and realize the anti-slip function; when the physical anti-slip fails, that is, when the wire rope falls out of the groove abnormally (such as when the operator pulls it crookedly or illegally due to illegal operation), since the entire anti-slip structure is elastic, it can prevent the wire rope from being cut by the anti-slip part 5 and the fixed pulley.

[0020] At least one wire rope sensor 1 is provided on one side of the anti-slip bracket 4. The wire rope sensor 1 can be a laser sensor, an infrared sensor, etc. that can determine whether there is a wire rope in the groove provided on the outer circumference of the fixed pulley, and the wire rope sensor 1 is electrically connected to the control switch of the hoisting system of the crane. In this way, it can not only achieve a certain physical anti-slip effect through the physical anti-slip mechanism, but also monitor and determine whether the wire rope is in the corresponding groove in real time through the wire rope sensor 1, and promptly send a signal to the control switch of the hoisting system after the wire rope jumps out of the groove, so as to control the hoisting system to stop running, thereby avoiding the fixed pulley, the fixed pulley center shaft and the wire rope from being worn out and scrapped due to the continuous operation of the hoisting system after the wire rope jumps out of the groove, and the resulting equipment and personnel casualties.

[0021] The terms "first," "second," "third," "fourth," and so on (if any) in the description and claims of the present invention and the accompanying drawings are used to distinguish similar items and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0022] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A crane fixed pulley wire rope anti-slip device, comprising at least one anti-slip bracket (4) that can be mounted on the outside of the fixed pulley, wherein a physical anti-slip mechanism is provided on the side of the anti-slip bracket (4) facing the outer circumference of the fixed pulley, and characterized in that: At least one wire rope sensor (1) is provided on one side of the anti-slip bracket (4). The wire rope sensor (1) can determine whether a wire rope exists in a groove provided on the outer circumference of the fixed pulley, and the wire rope sensor (1) is electrically connected to a control switch of a hoisting system of the crane.

2. The crane fixed pulley wire rope anti-slip device according to claim 1, characterized in that: The wire rope sensor (1) is a laser sensor.

3. The crane fixed pulley wire rope anti-slip device according to claim 1, characterized in that: The physical anti-slip mechanism comprises a mounting hole provided on the anti-slip bracket (4), an anti-slip screw (2) passing through the mounting hole, an end of the anti-slip screw (2) away from the fixed pulley passing through the mounting hole and being threadedly connected to a locking nut, an end of the anti-slip bolt close to the fixed pulley passing through the mounting hole and being connected to an anti-slip member (5), the anti-slip member (5) being arranged opposite to the groove on the outer circumferential surface of the fixed pulley, and an anti-slip spring (3) being arranged between the anti-slip member (5) and the anti-slip bracket (4) and being able to extend and retract along the radial direction of the fixed pulley, the two ends of the anti-slip spring (3) respectively abutting against the anti-slip bracket (4) and the anti-slip member (5).

4. The crane fixed pulley wire rope anti-slip device according to claim 3, characterized in that: The anti-slip spring (3) is sleeved on the outside of the anti-slip screw (2).

5. The crane fixed pulley wire rope anti-slip device according to claim 3, characterized in that: All the anti-slip screws (2) are fixedly connected to the same anti-slip component (5), or the end of each anti-slip screw (2) is connected to an anti-slip component (5).

6. The crane fixed pulley wire rope anti-slip device according to claim 1, characterized in that: The number of the anti-slip brackets (4) is three, and the three anti-slip brackets (4) are all located above the fixed pulley.

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