Steel wire rope anti-drop device

Abstract

This invention discloses a wire rope anti-derailment device, including a lifting device; at least one pulley connected to the lifting device; a wire rope wound around the pulley; and a limiting component disposed on the outside of the pulley. The limiting component increases the height of the pulley's outer wall in the opposite direction of the wire rope's force, preventing the wire rope from slipping out during operation. The limiting component includes at least one first limiting part disposed on the outside of the pulley. The first limiting part is L-shaped, with one side connected to the lifting device and the other side close to the pulley's outer wall. The height of the side of the first limiting part close to the pulley is higher than the outer wall of the pulley. This invention provides a wire rope anti-derailment device that effectively prevents the wire rope from slipping off during the daily use of a crane, avoids the wear problem caused by the wire rope jumping off during use, and sets up multi-level protection measures to stop the crane in time when the wire rope slips off, preventing a larger accident.

Description

Technical Field

[0001] This invention belongs to the field of safety devices, specifically, it relates to a wire rope anti-derailment device. Background Technology

[0002] In recent years, the demand for cranes has increased, leading to stricter requirements for crane safety. Improvements to existing technologies are particularly important. Overhead cranes are widely used in industrial and mining enterprises, where crane safety is paramount. Currently, semi-enclosed crane hooks pose safety hazards, especially the upper limit switch (collision limit). Failure of this switch could result in major safety and equipment accidents. Furthermore, during operation, due to lifting height or operational errors, the hook often gets caught or falls to the ground during descent, causing the wire rope to slacken and derail. Currently, the crane hook pulley consists of a pulley block and a housing. Due to the high lifting height, carelessness can easily cause the hook to fall, resulting in wire rope slackening and dislodging from the pulley, causing the wire rope to become tangled or damaged. The existing upper limit switch is a counterweight type. When the hook rises and encounters the counterweight, it lifts the counterweight, causing power loss and stopping the ascent. However, because the hook housing is round, the counterweight can easily slip, causing the limit switch to fail and resulting in a collision.

[0003] Chinese Patent Application No. CN201520770479.7 discloses a device for preventing the crane's upward limit from malfunctioning and for preventing the hook's wire rope from coming off the groove. The device is characterized by a limit and anti-derailment steel plate fixedly installed on the upper end of the hook shell. The limit and anti-derailment steel plate has wire rope slots at both ends. The wire ropes wound on the hook pulley grooves are respectively fitted into the wire rope slots of the limit and anti-derailment steel plate. The sealing plate has a through cavity, and the sealing plate fits onto the two ends of the limit and anti-derailment steel plate with the wire rope slots through the through cavity.

[0004] Chinese Patent Application No. CN201720727829.0 discloses a device for preventing the steel wire rope from detaching from the pulley of the elephant trunk head pulley of a gantry crane. The device includes a bracket for preventing detachment, with the fixed end of the bracket installed on the pulley shaft of the elephant trunk head pulley of the gantry crane. The bracket is rotatable about the pulley shaft. The movable end of the bracket extends to the front of the elephant trunk head pulley of the gantry crane, and a vertically arranged sleeve is fixed to the movable end. The inner diameter of the sleeve is adapted to the diameter of the steel wire rope. The steel wire rope passes through the sleeve and wraps around the elephant trunk head pulley of the gantry crane.

[0005] Although the aforementioned existing technologies have proposed technical solutions for preventing wire rope derailment, both of these solutions suffer from problems such as complex structures, the use of purely mechanical structures to prevent wire rope derailment, or friction at the contact surface with the wire rope, which increases the risk of wire rope damage and necessitates replacement of the wire rope after prolonged use.

[0006] Therefore, it is necessary to improve upon the shortcomings and defects of existing technologies and provide a wire rope anti-derailment device that effectively prevents the wire rope from falling off during the daily use of cranes, avoids the wear and tear problem caused by the wire rope jumping off during use, and sets up multi-level protection measures to stop the crane in time when the wire rope falls off, thus avoiding a larger accident.

[0007] In view of this, the present invention is proposed. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a wire rope anti-derailment device that can overcome or at least partially solve the above problems.

[0009] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is: a wire rope anti-derailment device, comprising...

[0010] Lifting equipment;

[0011] At least one pulley connected to the lifting equipment;

[0012] The steel wire rope wound inside the pulley;

[0013] Also includes

[0014] A limiting component is installed on the outside of the pulley;

[0015] The limiting component increases the height of the pulley's outer wall in the opposite direction of the wire rope's force, preventing the wire rope from coming off during operation.

[0016] The limiting component includes

[0017] At least one first limiting part is provided on the outside of the pulley;

[0018] The first limiting part is L-shaped, with one side connected to the lifting equipment and the other side close to the outer wall of the pulley;

[0019] The height of the first limiting part near the pulley is higher than the outer wall of the pulley.

[0020] Furthermore, the aforementioned

[0021] The first limiting part is detachably connected to the lifting equipment;

[0022] In one embodiment, the first limiting part and the lifting device are detachably connected by bolts;

[0023] In one embodiment, the side of the first limiting part connected to the lifting equipment is provided with at least one first through hole that mates with a bolt.

[0024] Furthermore, the aforementioned

[0025] The first limiting part consists of two symmetrically arranged on the outside of the pulley;

[0026] In one embodiment, the two first limiting portions are connected by a connecting portion;

[0027] In one embodiment, the connecting part and the first limiting part are fixedly connected;

[0028] In one embodiment, the connecting portion and the first limiting portion are welded together.

[0029] Furthermore, the limiting component also includes

[0030] The second limiting part is provided on the side of the first limiting part near the outer wall of the pulley and is parallel to the axial direction of the pulley;

[0031] The distance between the second limiting part and the center of the pulley is greater than the radius of the pulley.

[0032] Furthermore, the

[0033] The second limiter includes a connecting rod connected to the first limiter and a sleeve fitted onto the connecting rod;

[0034] Under the action of external force, the sleeve rotates around the connecting rod;

[0035] In one embodiment, the connecting rod and the first limiting part are detachably connected;

[0036] In one embodiment, the connecting rod has threads at both ends, and a second through hole is provided at the point where the first limiting part mates with the connecting rod. After the connecting rod passes through the through hole, it is connected to the other side by a nut.

[0037] Furthermore, the aforementioned

[0038] The sleeve is made of wear-resistant material;

[0039] In one embodiment, the sleeve is made of nylon.

[0040] Furthermore, the aforementioned

[0041] The second limiting part includes a rotatable connecting rod and a bearing that cooperates with the connecting rod;

[0042] The bearing is located at the second through hole where the first limiting part and the second limiting part cooperate.

[0043] Furthermore, the aforementioned

[0044] The limiting assembly also includes a third limiting part that sends a signal to the control terminal of the lifting equipment after colliding with the wire rope;

[0045] In one embodiment, the signal sent by the third limiting part to the control terminal of the lifting equipment is a stop signal.

[0046] Furthermore, at least one of the third limiting portions is disposed on the connecting portion.

[0047] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0048] 1. The present invention provides anti-derailment devices on both sides of the fixed pulley of the lifting equipment, and increases the height of the wire rope on both sides of the fixed pulley in the opposite direction of the force, so as to prevent the safety hazards caused by the wire rope jumping off during the use of the lifting equipment.

[0049] 2. Through the cooperation of multiple limiting components, multi-level protection against wire rope slippage is achieved, further ensuring the safety of lifting equipment during use.

[0050] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0051] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0052] In the attached diagram:

[0053] Figure 1 This is a first schematic diagram of the wire rope anti-derailment device of the present invention;

[0054] Figure 2 This is a second schematic diagram of the wire rope anti-derailment device of the present invention.

[0055] In the diagram: 1. Lifting equipment; 2. Pulley; 3. Wire rope; 4. Limiting assembly; 5. First limiting part; 6. First through hole; 7. Second limiting part; 8. Connecting rod; 9. Sleeve; 10. Second through hole; 11. Third limiting part; 12. Connecting part

[0056] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0058] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] Cranes are indispensable auxiliary tools in mining and processing enterprises, especially when moving and hoisting large equipment in the factory. Mobile bridge cranes play a crucial role in this process. During operation, the hook moves up and down in a reciprocating motion, thereby enabling the self-locking of the lifting device to open and close. However, during use, the frequent up-and-down reciprocating motion causes the steel wire rope 3 of the drum to become taut and slack. When the range of motion is large, the steel wire rope 3 is very likely to derail at the position of the moving pulley 2. Since the fixed pulley 2 on the upper part of the crane is far from the ground, the fault is not easy to be detected in time. If the fault is not detected in time, the steel wire rope 3 will jump off and rub against the fixed pulley 2, causing the steel wire rope 3 and the shaft to wear and break over time, creating a safety hazard for the equipment. This invention is based on this problem, as detailed below.

[0061] Figure 1 This primarily shows a simplified first schematic diagram of the anti-derailment device for the wire rope 3 described in this invention. The lifting equipment 1 is shown only as a simplified example due to its large size. Furthermore, the second through hole 10 is shown only in its position because it is tightly fitted to the connecting rod 8. The third limiting part 11 is also only shown in its installation position. In this invention, the third limiting part 11 can be implemented using a conventional mechanical limit switch or photoelectric limit switch; therefore, no further structural description is provided. Figure 1 The main focus is on the connection between sleeve 9 and connecting rod 8, with connecting rod 8 fixed in place by an external nut.

[0062] Figure 2 This mainly shows a second simplified schematic diagram of the anti-derailment device for the steel wire rope 3 described in this invention. Figure 2 and Figure 1 The main difference lies in the second limiting part 7. Figure 2The second limiting part 7 is connected to the connecting rod 8 via a bearing and engages with the second through hole 10. The connecting rod 8 can rotate. The second through hole 10 is not shown because it is tightly fitted with the bearing; its position is similar to... Figure 1 The positions are the same.

[0063] like Figures 1 to 2 As shown, the present invention provides a wire rope 3 anti-derailment device, including a lifting device 1, at least one pulley 2 connected to the lifting device 1, a wire rope 3 wound around the pulley 2, and a limiting component 4 disposed on the outside of the pulley 2. The limiting component 4 increases the height of the outer wall of the pulley 2 in the opposite direction of the force on the wire rope 3, preventing the wire rope 3 from detaching during operation. Specifically, the lifting device 1 of the present invention is a bridge crane used in factories, mainly used for lifting large equipment or workpieces. During use, the wire rope 3 often jumps off the fixed pulley 2 due to the reciprocating up and down movement of the wire rope 3. If not handled in time, it will lead to a safety accident.

[0064] Furthermore, the limiting component 4 of the present invention includes at least one first limiting part 5 disposed on the outside of the pulley 2; the first limiting part 5 is L-shaped, with one side connected to the lifting device 1 and the other side close to the outer wall of the pulley 2; the height of the side of the first limiting part 5 close to the pulley 2 is higher than the outer wall of the pulley 2.

[0065] Furthermore, the first limiting part 5 is detachably connected to the lifting device 1.

[0066] In one embodiment, in addition to the anti-derailment device for the wire rope 3 described above, the first limiting part 5 and the lifting equipment 1 are detachably connected by bolts. When maintenance is carried out or the limiting component 4 is not needed, the first limiting part 5 can be disassembled. Furthermore, at least one first through hole 6 that mates with a bolt is provided on the side of the first limiting part 5 that is connected to the lifting equipment 1.

[0067] In one embodiment, in addition to the anti-derailment device for the wire rope 3 described above, the first limiting part 5 consists of two symmetrically arranged on the outside of the pulley 2. The two first limiting parts 5 are symmetrically arranged in the axial direction of the fixed pulley 2, and the two first limiting parts 5 are connected by a connecting part 12. Furthermore, the connecting part 12 and the first limiting part 5 are fixedly connected, for example by welding.

[0068] In one embodiment, in addition to the anti-derailment device for the wire rope 3 described above, the limiting component 4 also includes a second limiting part 7 disposed on the side of the first limiting part 5 near the outer wall of the pulley 2 and parallel to the axial direction of the pulley 2. The distance between the second limiting part 7 and the center of the pulley 2 is greater than the radius of the pulley 2. The second limiting part includes a connecting rod 8 connected to the first limiting part 5 and a sleeve 9 sleeved on the connecting rod 8. Under the action of external force, the sleeve 9 rotates around the connecting rod 8. When the wire rope 3 jumps out of the fixed pulley 2, it generates sliding friction with the second limiting part 7, and the second limiting part 7 can also limit the jump of the wire rope 3.

[0069] In one embodiment, in addition to the anti-derailment device for the wire rope 3 described above, the connecting rod 8 and the first limiting part 5 are detachably connected. Furthermore, the connecting rod 8 has threads at both ends, and the first limiting part 5 and the connecting rod 8 have a second through hole 10 at their mating point. After the connecting rod 8 passes through the through hole, it is connected to the other side by a nut. The connecting rod 8 is a rotating shaft with a screw hole at its front end. After passing through the through hole, it is connected to the screw hole at the front end of the connecting rod 8 by a bolt on the other side of the first limiting part 5 to fix the connecting rod 8.

[0070] In one embodiment, in addition to the anti-derailment device for the wire rope 3 described above, the sleeve 9 is made of a wear-resistant material, such as nylon. When the wire rope 3 jumps out of the fixed pulley 2, it comes into contact with the second limiting part 7. The wear-resistant material cooperates with the rolling friction to extend the service life of the second limiting part 7.

[0071] In one embodiment, in addition to the anti-derailment device for the wire rope 3 described above, the second limiting part 7 also includes another structure: a rotatable shaft and a bearing that cooperates with the shaft. The bearing is located at the second through hole 10 where the first limiting part 5 and the second limiting part 7 cooperate. Unlike the second limiting part 7 in the previous embodiment, the front end of the shaft may or may not have a screw hole. In this embodiment, the shaft can rotate under the action of the bearing, thus avoiding the need for the sleeve 9.

[0072] In one embodiment, in addition to the aforementioned anti-derailment device for the wire rope 3, the limiting component 4 further includes a third limiting part 11 that sends a signal to the control terminal of the lifting equipment 1 after colliding with the wire rope 3. The signal sent by the third limiting part 11 to the control terminal of the lifting equipment 1 is a stop signal. When the wire rope 3 jumps off, and neither the first limiting part 5 nor the second limiting part 7 can effectively act on the wire rope 3, the wire rope 3 collides with the third limiting part 11. The third limiting part 11 sends a stop signal to stop the crane from running, thus avoiding a safety accident. At least one of the third limiting parts 11 is provided on the connecting part 12, which connects two first limiting parts 5 and is close to one end of the wire rope 3. The third limiting part 11 can be fixed to the connecting part 12 by bolts or other detachable means. The third limiting part 11 is a mechanical limit switch, a photoelectric limit switch, or a Hall limit switch, but is not limited to these. Other limiting components that can achieve this function are within the scope of protection of this embodiment.

[0073] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0074] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0075] Except where at least some of such features and / or processes or units are mutually exclusive, any combination may be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or apparatus so disclosed. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0076] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0077] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A wire rope anti-derailment device, comprising: Lifting equipment (1); At least one pulley (2) connected to the lifting equipment (1); part of the pulley (2) is higher than the lifting equipment (1); a wire rope (3) is wound around the pulley (2); Its features are: It also includes a limiting component (4) disposed on the outside of the pulley (2); the limiting component (4) increases the height of the outer wall of the pulley (2) in the opposite direction of the force on the wire rope (3) to prevent the wire rope (3) from coming off during operation; the limiting component (4) includes two first limiting parts (5), which are symmetrically disposed on the outside of the pulley (2); the first limiting part (5) is L-shaped, one side is detachably connected to the lifting equipment (1), and the other side is close to the outer wall of the pulley (2) and is higher than the outer wall of the pulley (2); the two first limiting parts (5) are connected by a connecting part (12), and the connecting part (12) is connected to the corner of the L-shaped first limiting part (12); The second limiting part (7) is disposed on the side of the first limiting part (5) near the outer wall of the pulley (2) and is parallel to the axial direction of the pulley (2); the distance between the second limiting part (7) and the center of the pulley (2) is greater than the radius of the pulley (2); the second limiting part includes a connecting rod (8) connected to the first limiting part (5) and a sleeve (9) sleeved on the connecting rod (8). The sleeve (9) rotates around the connecting rod (8) under the action of external force, and the sleeve (9) is disposed at a certain distance from the outer periphery of the pulley (2); The connecting rod (8) has threads at both ends. The first limiting part (5) and the connecting rod (8) have a second through hole (10). After the connecting rod (8) passes through the through hole, it is detachably connected to the first limiting part (5) on the other side by a nut. At least one third limiting part (11) is provided on the connecting part (12). After the third limiting part (11) collides with the wire rope (3), it sends a signal to the control end of the lifting equipment (1).

2. The wire rope anti-derailment device according to claim 1, characterized in that: The first limiting part (5) and the lifting equipment (1) are detachable connected by bolts.

3. The wire rope anti-derailment device according to claim 2, characterized in that: The first limiting part (5) is provided with at least one first through hole (6) that is bolted on the side where it is connected to the lifting equipment (1).

4. The wire rope anti-derailment device according to claim 1, characterized in that: The connecting part (12) and the first limiting part (5) are fixedly connected.

5. A wire rope anti-derailment device according to claim 4, characterized in that: The connecting part (12) and the first limiting part (5) are welded together.

6. The wire rope anti-derailment device according to claim 1, characterized in that: The sleeve (9) is made of wear-resistant material.

7. A wire rope anti-derailment device according to claim 6, characterized in that: The sleeve (9) is made of nylon.

8. The wire rope anti-derailment device according to claim 1, characterized in that: The second limiting part (7) includes a rotatable connecting rod (8) and a bearing that cooperates with the connecting rod (8); the bearing is disposed at the second through hole (10) where the first limiting part (5) and the second limiting part (7) cooperate.

9. A wire rope anti-derailment device according to any one of claims 1-8, characterized in that: The signal sent by the third limit unit (11) to the control terminal of the lifting equipment (1) is a stop signal.

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