Pitching lifting steel wire rope connector disconnection protection device and quay crane or ship unloader

Abstract

The invention relates to the technical field of steel wire rope tail end fixing, and discloses a pitching lifting steel wire rope connector disconnection protection device and a quay crane or ship unload.The pitching lifting steel wire rope connector disconnection protection device comprises at least two supports which are arranged side by side, a middle beam and a rope fixing device, the middle beam is provided with a limiting device, the limiting device is arranged between the two limiting structures so as to limit the movement range of the limiting device to be between the two limiting structures, the middle beam is movably arranged on the limiting structures, and the rope fixing devices are arranged at the two ends of the middle beam. When the rope at one end is broken, the middle beam moves towards the unbroken end of the rope due to uneven stress of the two ends, the limiting device arranged on the middle beam also moves along with the middle beam, but under the limiting effect of the limiting structure, the limiting device collides with the limiting structure to stop moving, and therefore movement of the middle beam is stopped. Accidents caused by falling of the middle beam are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wire rope end fixing, and in particular to a pitching hoisting wire rope joint disconnection protection device, a quay crane or a ship unloader. Background Art

[0002] In lifting machinery, port equipment, and large-scale luffing mechanisms, wire ropes are core load-bearing components. The reliability of their end-fixing methods and slack-rope protection designs are directly related to the safe operation of the equipment. Currently, the most common method for securing wire rope ends is with a splint structure. However, in practice, this traditional splint structure is prone to causing heavy objects to fall if the wire rope breaks. Summary of the Invention

[0003] In view of this, the present invention provides a pitching hoist wire rope joint disconnection protection device, a quay crane or a ship unloader to solve the problem that heavy objects may easily fall due to wire rope breakage.

[0004] On the one hand, the present invention provides a pitch lifting wire rope joint disconnection protection device, comprising: at least two supports arranged in parallel, an intermediate beam and a rope fixing device, each of the supports is provided with a limiting structure, the intermediate beam is provided with a limiting device, the limiting device is arranged between the two limiting structures to limit the movable range of the limiting device to between the two limiting structures, the intermediate beam can be movably arranged in all the limiting structures, the movable direction of the intermediate beam is consistent with the arrangement direction of all the supports, and the rope fixing device is arranged at both ends of the intermediate beam.

[0005] In an optional embodiment, the limiting structure includes a top plate and a support plate that are arranged opposite to each other, and the limiting plate is arranged opposite to each other between the top plate and the support plate.

[0006] In an optional embodiment, fixed plates are respectively provided on the outer sides of the two support plates, the upper portions of the fixed plates on both sides are connected to the top plate, and a fixing structure is provided on the bottom of the fixed plates.

[0007] In an optional embodiment, the limiting device includes limiting clamping plates arranged on both sides of the middle beam.

[0008] In an optional embodiment, buffer members are respectively provided at both ends of the limiting clamp facing the limiting structure.

[0009] In an optional embodiment, an alarm device is provided between the limiting structure and the limiting device, the alarm device is provided on the support, and the alarm device is provided on a movable path of the limiting device.

[0010] In an optional embodiment, the alarm device includes a bracket and a travel switch, the bracket is arranged on the support, and the travel switch is arranged on the bracket.

[0011] In an optional embodiment, the rope fixing device is a wedge-shaped joint.

[0012] In an optional embodiment, the width of both sides of the wedge-shaped joint is greater than the spacing between the limiting plates.

[0013] In an optional embodiment, the rope fixing device is provided with a tension sensor.

[0014] On the other hand, the present invention also provides a quay crane or ship unloader, comprising the above-mentioned pitching and lifting wire rope joint disconnection protection device.

[0015] The rope fixing device is used to connect with the rope. When one end of the rope is broken, the middle beam will move toward the end where the rope is not broken due to uneven force at both ends. The limiting device set on the middle beam will also move with the middle beam, but under the limiting action of the limiting structure, the limiting device will collide with the limiting structure to stop the movement, thereby stopping the movement of the middle beam and avoiding the middle beam falling and causing an accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0017] Figure 1 This is a front view of a pitching hoist wire rope joint disconnection protection device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A top view of a pitching hoist wire rope joint disconnection protection device is shown;

[0019] Figure 3 for Figure 1 Cross-sectional view of middle AA;

[0020] Figure 4 for Figure 2 Cross-section of the middle BB;

[0021] Figure 5 for Figure 1 Cross-section of the middle CC;

[0022] Figure 6 for Figure 1Cross-sectional view of the middle DD;

[0023] Figure 7 for Figure 1 Cross-sectional view of EE.

[0024] Description of reference numerals:

[0025] 1. Wedge joint; 2. Support; 3. Middle beam; 4. Limit device; 5. Alarm device;

[0026] 11. Limit fastener; 12. Outer sleeve; 13. Mandrel; 14. Tension sensor; 15. Pin;

[0027] 21. Support plate; 22. Limit plate; 23. Wear-resistant lining plate; 24. Top plate;

[0028] 41. Limiting splint; 42. Buffer;

[0029] 55. Bracket. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0031] The following combination Figures 1 to 7 , describing embodiments of the present invention.

[0032] According to an embodiment of the present invention, on the one hand, a pitch lifting wire rope joint disconnection protection device is provided, comprising: at least two supports 2 arranged in parallel, an intermediate beam 3 and a rope fixing device, each of the supports 2 is provided with a limiting structure, the intermediate beam 3 is provided with a limiting device 4, the limiting device 4 is provided between the two limiting structures to limit the movable range of the limiting device 4 between the two limiting structures, the intermediate beam 3 can be movably provided in all the limiting structures, the movable direction of the intermediate beam 3 is consistent with the arrangement direction of all the supports 2, and the rope fixing devices are provided at both ends of the intermediate beam 3.

[0033] It should be noted that the rope fixing device is used to connect with the rope. The number of supports 2 includes at least two, and two, or three or more can be set. The support 2 is fixed on the T-shaped frame of the port quay crane. The support 2 is fixed on the middle beam 3 and extends laterally through all the limiting structures. When multiple supports 2 are set, the limiting device 4 is set between two adjacent supports 2 and is between the limiting structures on the two supports 2. The two ends of the middle beam 3 are subjected to the tension of the rope fixing device, and the movable direction of the middle beam 3 is toward or away from the limiting structure.

[0034] When one end of the rope is broken, the middle beam 3 will move toward the end where the rope is not broken due to uneven force at both ends. The limiting device 4 set on the middle beam 3 will also move with the middle beam 3, but under the limiting action of the limiting structure, the limiting device 4 will collide with the limiting structure to stop the movement, thereby stopping the movement of the middle beam 3 and avoiding the middle beam 3 falling and causing an accident.

[0035] In an optional embodiment, the limiting structure includes a top plate 24 and a support plate 21 disposed opposite each other, with a limiting plate 22 disposed between the top plate 24 and the support plate 21. The spacing between the two limiting plates 22 is less than the lateral width of the limiting device 4, so that when the limiting device 4 moves, it impacts the end surfaces of the two limiting plates 22, thereby acting as a limiter. The middle beam 3 can preferably be a strip-shaped pull plate, which passes through the space between the top plate 24, the support plate 21, and the two limiting plates 22. The support plate 21 is used to support the pull plate, and a spacing is set between the two sides of the pull plate and the limiting plates 22 on either side.

[0036] In an optional embodiment, a fixing plate is disposed on the outer side of each of the two limiting plates 22. The upper portions of the fixing plates on both sides are connected to the top plate 24, and a fixing structure is disposed on the bottom of the fixing plates. The fixing plates are connected to the T-shaped frame via the fixing structure. The fixing structure may include a fixing base plate and bolts. The fixing base plate is provided with screw holes, through which the bolts pass to connect to the T-shaped frame, or the fixing structure includes a fixing base plate welded to the T-shaped frame. The fixing plates are disposed parallel to the limiting plates 22.

[0037] Because the middle beam 3 moves on the support plate 21, in an optional embodiment, to further enhance stability, a wear-resistant device is provided on the upper portion of the support plate 21. The wear-resistant device includes a wear-resistant lining plate 23 and bolts. The wear-resistant lining plate 23 is attached to the upper surface of the support plate 21 and is mounted to the support plate 21 via bolts. To prevent interference between the bolts and the middle beam 3, the wear-resistant lining plate 23 is provided with a recessed groove into which the bolt heads are sunken. Preferably, the wear-resistant lining plate 23 is a rubber sheet, which not only provides wear resistance but also mitigates the impact of the middle beam 3 on the support plate 21.

[0038] In an optional embodiment, the limiting device 4 includes limiting clamps 41 provided on both sides of the middle beam 3. The limiting clamps 41 are divided into two parts, one on each side of the middle beam 3, with the plate surface parallel to the plate surface of the limiting plate 22. The width of the limiting clamps 41 is consistent with the size of the middle beam 3, or is set according to the actual application. The length can also be set according to the actual application. However, it should be noted that the length of the limiting clamps 41 determines the travel of the limiting clamps 41, and sufficient travel needs to be reserved according to the actual application.

[0039] Because the tension of the wire rope at one end is greater when the other end is disconnected, the force exerted by the limit clamp 41 on the limit plate 22 is greater. To reduce the impact, in an optional embodiment, the limit clamp 41 is provided with buffers 42 at both ends of the limit structure. The buffers 42 can be made of rubber and mounted to the end surface of the limit clamp 41 via bolts. The thickness, length, and width of the buffers 42 can be determined according to the actual application. To prevent the bolts from being impacted, countersunk holes are provided on the buffers 42, and the heads of the bolts are sunk into the countersunk holes.

[0040] In an optional embodiment, an alarm device 5 is provided between the limiting structure and the limiting device 4. The alarm device 5 is provided on the support 2 and on the movable path of the limiting device 4. The alarm device 5 is of a trigger type and is triggered when an object collides with it. The front end of the alarm device 5 is close to the pull plate but does not contact the pull plate and is on the movable path of the limiting device 4. When one end of the rope is disconnected, the other end of the rope drives the pull plate to move laterally as a whole. The limiting device 4 moves laterally, first touching the alarm device 5 and then hitting the limiting structure. After touching the alarm device 5, the machine automatically or manually stops. When the tension of the ropes at both ends is inconsistent, causing the limiting device 4 to touch the alarm device 5, an alarm will also be sounded. At this time, the tension of the ropes at both ends of the middle beam 3 can be adjusted to be consistent to improve safety.

[0041] In an optional embodiment, the alarm device 5 includes a bracket 55 and a travel switch. The bracket 55 is mounted on the support 2, and the travel switch is mounted on the bracket 55. The front end of the travel switch is close to the pull plate, and the alarm is triggered when the limit device 4 contacts the front end of the travel switch. The bracket 55 is L-shaped and is bolted to the side of the support 2. One end plate of the bracket 55 is mounted on the support 2, and the other end plate is horizontally arranged to accommodate the travel switch.

[0042] In an optional embodiment, the rope fixing device is a wedge-shaped joint 1. The wedge-shaped joint 1 includes a wedge sleeve and a wedge block. The wedge sleeve includes an outer sleeve 12 and a core shaft 13. The core shaft 13 of the wedge-shaped joint 1 at one end passes through the middle beam 3 and the outer sleeve 12 and is then installed with a limiting fastener 11. The limiting fastener 11 is installed on the core shaft 13 by bolts; the core shaft 13 of the wedge-shaped joint 1 at the other end passes through the outer sleeve 12 and the middle beam 3 and is then limited by a pin 15. Through the cooperation of the wedge sleeve and the wedge block, and utilizing the wedge self-locking principle, radial pressure is generated when force is applied, so that the wire rope and the joint fit tightly, significantly improving the firmness and anti-slip ability of the connection. Its self-tightening effect can effectively resist the impact of dynamic loads and reduce the risk of rope breakage. The wedge-shaped joint 1 has high strength, easy installation, and wide adaptability as its core advantages, becoming the mainstream solution for fixing the end of wire ropes, especially suitable for the field of heavy equipment with high safety requirements.

[0043] When one end of the rope breaks, the other end of the rope drives the middle beam 3 to move laterally. At this time, the limiting device 4 will exert a large impact force on the limiting structure. If the limiting structure fails, the middle beam 3 may still fall. To further improve safety, in an optional embodiment, the width of the two sides of the wedge-shaped joint is greater than the spacing between the limiting plates 22. When the limiting device 4 impacts the limiting structure, causing the limiting structure to fail, the width of the wedge sleeve of the other end of the wedge-shaped joint 1 is greater than the width of the limiting structure, making it impossible for the wedge-shaped joint to pass through the limiting structure, thereby preventing the middle beam 3 from being dropped by the rope, further improving safety.

[0044] In an optional embodiment, the rope securing device is equipped with a tension sensor 14. When the rope securing device is configured as a wedge joint 1, the tension sensor 14 is located at the pin 15 of the wedge joint 1 to detect the wire rope tension in real time and feed the data back to the control system. If the tension sensor 14 detects a value ≤ the weight of the wire rope, the rope is considered loose. If the tension sensor 14 detects a value ≥ 110% * weight at different angles, the rope is considered overloaded.

[0045] The present invention also provides a quay crane or a ship unloader. An embodiment of the quay crane or the ship unloader according to the present invention includes the above-mentioned pitching and lifting wire rope joint disconnection protection device.

[0046] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A pitching hoist wire rope joint disconnection protection device, characterized in that: include: At least two supports (2), an intermediate beam (3) and a rope fixing device are arranged in parallel. Each of the supports (2) is provided with a limiting structure. The intermediate beam (3) is provided with a limiting device (4). The limiting device (4) is arranged between the two limiting structures to limit the range of movement of the limiting device (4) between the two limiting structures. The intermediate beam (3) is movably arranged in all the limiting structures. The moving direction of the intermediate beam (3) is consistent with the arrangement direction of all the supports (2). The rope fixing devices are arranged at both ends of the intermediate beam (3).

2. The pitching hoist wire rope joint disconnection protection device according to claim 1, characterized in that: The limiting structure comprises a top plate (24) and a support plate (21) that are arranged opposite to each other, and a limiting plate (22) is arranged opposite to each other between the top plate (24) and the support plate (21).

3. The pitching hoist wire rope joint disconnection protection device according to claim 2, characterized in that: A fixing plate is respectively provided on the outside of the two support plates (21), the upper parts of the fixing plates on both sides are connected to the top plate (24), and a fixing structure is provided on the bottom of the fixing plate.

4. The pitching hoist wire rope joint disconnection protection device according to claim 1, characterized in that: The limiting device (4) comprises limiting clamping plates (41) arranged on both sides of the middle beam (3).

5. The pitching hoist wire rope joint disconnection protection device according to claim 4, characterized in that: Buffering components (42) are respectively provided on both ends of the limiting clamping plate (41) facing the limiting structure.

6. The pitching hoist wire rope joint disconnection protection device according to claim 1, characterized in that: An alarm device (5) is provided between the limiting structure and the limiting device (4); the alarm device (5) is provided on the support (2); and the alarm device (5) is provided on a movable path of the limiting device (4).

7. The pitching hoist wire rope joint disconnection protection device according to claim 6, characterized in that: The alarm device (5) comprises a bracket (55) and a travel switch, wherein the bracket (55) is arranged on the support (2), and the travel switch is arranged on the bracket (55).

8. The pitching hoist wire rope joint disconnection protection device according to claim 2, characterized in that: The rope fixing device is a wedge-shaped joint (1), and the width of both sides of the wedge-shaped joint (1) is greater than the spacing between the limiting plates (22).

9. The pitching hoist wire rope joint disconnection protection device according to any one of claims 1 to 8, characterized in that: The rope fixing device is provided with a tension sensor (14).

10. A quay crane or ship unloader, characterized in that: It comprises the pitching hoisting wire rope joint disconnection protection device as described in any one of claims 1 to 9.

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