A device for detecting loose wire rope on a drum.

Abstract

This utility model relates to a device for detecting loose wire rope on a wire rope drum, comprising a crossbar, a bracket, a trigger limiter, and a limit stop. The bracket is fixedly installed; the trigger limiter is fixedly mounted on the bracket; the crossbar is rotatably mounted on the bracket and is fixedly connected to the limit stop via a linkage mechanism. The limit stop and the trigger limiter are in contact or separated. The trigger limiter is used for communication connection with a PLC controller and sends the signal of its contact with the limit stop to the PLC controller. The advantages of this utility model are its simple structure, reasonable design, and ease of use. It can detect whether the wire rope on the wire rope drum is loose during operation, thus protecting the wire rope and the drum. Simultaneously, it can promptly detect loose wire rope conditions, preventing serious damage to the surrounding mechanisms of the drum and the quay crane itself.

Description

Technical Field

[0001] This utility model relates to the technical field of shore crane equipment, specifically to a device for detecting loose wire rope on a drum. Background Technology

[0002] During the operation of the shore crane, the drum mechanism is constantly running to complete the task. The drum and the cargo are connected by a wire rope. The wire rope moves back and forth on the drum and is arranged tightly and regularly to ensure that the cargo is lifted smoothly.

[0003] Currently, most shore cranes use hydraulic systems for emergency braking of their drum mechanisms. If this hydraulic system malfunctions, such as pump depressurization, cylinder leakage, brake pad wear, or hydraulic oil deterioration, the drum mechanism may fail to brake, preventing the drum from fully locking. This can lead to the wire rope loosening and slipping out of the rope groove. If this is not detected in time, serious damage to the drum and wire rope can occur, potentially causing severe damage to the shore crane itself and threatening the safety of the workers. Utility Model Content

[0004] This invention provides a device for detecting loose wire rope on a drum, aiming to solve the problems in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A device for detecting loose wire rope on a drum includes a crossbar, a bracket, a trigger limiter, and a limit stop. The bracket is fixedly installed. The trigger limiter is fixedly mounted on the bracket. The crossbar is rotatably mounted on the bracket and is fixedly connected to the limit stop via a linkage mechanism. The limit stop contacts or separates from the trigger limiter. The trigger limiter is used for communication connection with a PLC controller and sends a signal indicating contact with the limit stop to the PLC controller.

[0007] The beneficial effects of this utility model are: during the detection process, when the wire rope on the drum is not loose, the crossbar is in contact with the wire rope on the drum, and the trigger limit device can always detect the signal of the limit stop and send the corresponding signal to the PLC controller.

[0008] When the wire rope on the drum becomes loose, the crossbar, under the force of the wire rope on the drum, drives the limit stop to swing through the linkage mechanism. The limit stop separates from the trigger limit stop. At this time, the trigger limit stop does not detect the signal from the limit stop, and the PLC controller does not receive the signal. At this time, manual intervention is required to deal with the loose wire rope on the drum.

[0009] This utility model has a simple structure, reasonable design, and is easy to use. It can detect whether the wire rope on the drum is loose during operation, thus protecting the wire rope and the drum. At the same time, it can also detect the loosening of the wire rope in time, avoiding damage to the surrounding mechanism of the drum and the shore crane itself in serious cases.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the support includes two legs, which are vertically fixed and distributed relative to each other; the linkage mechanism includes a connecting rod and two connecting rods, which are rotatably mounted on the two legs; the two ends of the crossbar are fixedly connected to the upper ends of the two connecting rods respectively; the connecting rod is fixedly mounted on the lower end of any one of the connecting rods; the limiting stop is fixedly mounted on one end of the connecting rod; the trigger limiting member is fixedly mounted on the corresponding leg and contacts or separates from the limiting stop.

[0012] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The crossbar is supported by two legs, and the crossbar is rotated between the two legs by two connecting rods. The connection between the limit stop and the corresponding connecting rod is achieved by the connecting rod, which makes assembly convenient.

[0013] Furthermore, the limiting stop has an arc-shaped plate structure, and its protruding side contacts or separates from the trigger limiting member.

[0014] The advantages of adopting the above-mentioned further solution are that the structure is simple, the shape of the limit stop is reasonably designed, and it is convenient for the limit stop and the trigger limit to contact each other.

[0015] Furthermore, a counterweight is fixedly connected to the other end of the connecting rod, and an adjustment component is installed on the corresponding support leg. The adjustment component abuts against the side of the connecting rod away from the counterweight.

[0016] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The adjustment component is used to adjust the corresponding connecting rod, and the counterweight block is used to ensure that the connecting rod is always in a vertical state.

[0017] Furthermore, the adjustment assembly includes a mounting plate and an adjustment screw. The mounting plate is fixedly mounted on the corresponding support leg. The adjustment screw is horizontally positioned and threadedly connected to the mounting plate, with one end of the adjustment screw abutting against the corresponding connecting rod.

[0018] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The adjustment of the connecting rod is achieved by using the adjusting screw, ensuring that the connecting rod is always in a vertical state.

[0019] Furthermore, an adjusting nut is threaded onto the adjusting screw, and the adjusting nut abuts against the side of the mounting plate away from the corresponding connecting rod.

[0020] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The connecting rod is further fixed by the adjusting nut to ensure that the connecting rod is always in a vertical state.

[0021] Furthermore, the connecting rod includes an outer rod and an inner rod, which are distributed opposite to each other on both sides of the corresponding support leg and are fixedly connected by a pivot, which is rotatably connected to the corresponding support leg; the upper ends of the two connecting rods are respectively fixedly connected to one end of the crossbar; the limiting stop is fixedly installed at the lower end of the corresponding inner rod.

[0022] The advantages of adopting the above-mentioned further solution are that the structure is simple, the structure of the above-mentioned connecting rod is reasonable, and the connection between the connecting rod and the leg and the crossbar can be realized, making assembly convenient.

[0023] Furthermore, the length of the inner rod is less than the length of the outer rod.

[0024] The advantages of adopting the above-mentioned further solution are that the structure is simple, the length of the inner and outer rods is reasonably designed, and the various components can be reasonably assembled.

[0025] Furthermore, the crossbar includes a long bar and a short bar, the long bar being rotatably mounted on the bracket; the short bar is fixedly mounted on one side of the long bar and is distributed parallel to the long bar.

[0026] The advantages of adopting the above-mentioned further solution are that the structure is simple and the double-layer design of the crossbar is more reasonable. It can realize the assembly between the crossbar and the support, and the contact between the crossbar and the wire rope on the drum, which is convenient for inspection.

[0027] Furthermore, the length of the long rod is greater than the length of the short rod.

[0028] The advantages of adopting the above-mentioned further solution are that the structure is simple, the length of the long rod and the short rod are reasonably designed, which can not only realize the detection, but also save materials. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the structure during the testing process of this utility model;

[0031] Figure 3 This is an assembly drawing of the outrigger, linkage mechanism, trigger limit component, limit stop component, and counterweight block in this utility model.

[0032] Figure 4 This is an assembly drawing of the support leg and linkage mechanism in this utility model;

[0033] Figure 5 This is a schematic diagram of the crossbar structure in this utility model;

[0034] Figure 6 This is an assembly drawing of the counterweight, limiting stop, and connecting rod in this utility model;

[0035] Figure 7 This is a schematic diagram of the structure of the two support legs in this utility model;

[0036] Figure 8 This is a schematic diagram of the trigger limiting component in this utility model.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. Crossbar; 2. Outrigger; 3. Connecting rod; 4. Adjusting screw; 5. Limit stop; 6. Counterweight; 7. Trigger limit stop; 8. Drum; 9. Wire rope; 10. Connecting rod. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0043] Example 1

[0044] like Figures 1 to 8 As shown, this embodiment provides a device for detecting loose wire rope on a drum, including a crossbar 1, a bracket, a trigger limiter 7, and a limit stop 5. The bracket is fixedly installed; the trigger limiter 7 is fixedly installed on the bracket; the crossbar 1 is rotatably installed on the bracket and is fixedly connected to the limit stop 5 through a linkage mechanism. The limit stop 5 is in contact with or separates from the trigger limiter 7. The trigger limiter 7 is used for communication connection with a PLC controller and sends the signal of contact with the limit stop 5 to the PLC controller.

[0045] During the testing process, when the wire rope 9 on the drum 8 is not loose, the crossbar 1 is in contact with the wire rope 9 on the drum 8, triggering the limit device 7 to always detect the signal of the limit stop 5 and send the corresponding signal to the PLC controller.

[0046] When the wire rope 9 on the drum 8 becomes loose, the crossbar 1, under the force of the wire rope 9 on the drum 8, drives the limit stop 5 to swing through the linkage mechanism. The limit stop 5 separates from the trigger limit stop 7. At this time, the trigger limit stop 7 does not detect the signal of the limit stop 5, and the PLC controller does not receive the signal. At this time, manual intervention is required to deal with the loose wire rope 9 on the drum 8.

[0047] Preferably, in this embodiment, the trigger limiting member 7 is a trigger sensor in the prior art, and its specific structure and signal transmission principle will not be described in detail here.

[0048] In addition, the PLC controller mentioned above is a controller based on existing technology, and its specific structure and principle will not be described in detail here.

[0049] This embodiment has a simple structure, reasonable design, and is easy to use. It can detect whether the wire rope on the drum is loose during operation, thus protecting the wire rope and the drum. At the same time, it can also detect the loosening of the wire rope in time, avoiding damage to the surrounding mechanism of the drum and the shore crane itself in serious cases.

[0050] Example 2

[0051] Based on Embodiment 1, in this embodiment, the support includes two legs 2, which are vertically fixed and distributed relative to each other; the linkage mechanism includes a connecting rod 10 and two connecting rods 3, which are rotatably mounted on the two legs 2; the two ends of the crossbar 1 are fixedly connected to the upper ends of the two connecting rods 3 respectively; the connecting rod 10 is fixedly mounted on the lower end of any one of the connecting rods 3; the limiting stop 5 is fixedly mounted on one end of the connecting rod 10; the trigger limiting member 7 is fixedly mounted on the corresponding leg 2 and contacts or separates from the limiting stop 5.

[0052] The scheme has a simple structure and reasonable design. It uses two support legs 2 to support the crossbar 1, and uses two connecting rods 3 to realize the rotational connection between the crossbar 1 and the two support legs 2. It also uses connecting rod 10 to realize the connection between the limit stop 5 and the corresponding connecting rod 3, which is easy to assemble.

[0053] Preferably, in this embodiment, the support leg 2 has a rectangular cross-section.

[0054] In addition, the connecting rod 10 is preferably a long strip-shaped plate structure, which is perpendicular to the corresponding connecting rod 3.

[0055] Preferably, in this embodiment, a fixing frame is provided on the support leg 2 corresponding to the connecting rod 10. The fixing frame is horizontally distributed and perpendicular to the support leg 2. The trigger limiting member 7 is fixedly installed on the fixing frame.

[0056] Example 3

[0057] Based on Embodiment 2, in this embodiment, the limiting stop 5 has an arc-shaped plate structure, and its protruding side contacts or separates from the trigger limiting member 7.

[0058] The scheme has a simple structure and the shape of the limit stop 5 is reasonably designed, which facilitates the contact between the limit stop 5 and the trigger limit 7.

[0059] Preferably, in this embodiment, the limiting stop 5 is preferably a strip-shaped arc-shaped plate structure.

[0060] Example 4

[0061] Based on any one of Embodiments 2 to 3, in this embodiment, the other end of the connecting rod 10 is fixedly connected to a counterweight 6, and an adjustment component is installed on the corresponding support leg 2. The adjustment component abuts against the side of the corresponding connecting rod 3 away from the counterweight 6.

[0062] The scheme has a simple structure and reasonable design. It uses the adjustment component to adjust the corresponding connecting rod 3, and at the same time, the counterweight 6 mentioned above ensures that the connecting rod 3 is always in a vertical state.

[0063] Preferably, in this embodiment, the counterweight 6 is a rectangular block structure.

[0064] Example 5

[0065] Based on embodiment 4, in this embodiment, the adjustment assembly includes a mounting plate and an adjustment screw 4. The mounting plate is fixedly mounted on the corresponding support leg 2. The adjustment screw 4 is horizontally arranged and threadedly connected to the mounting plate, and one end of the adjustment screw 4 abuts against the corresponding connecting rod 3.

[0066] The scheme has a simple structure and reasonable design. The adjustment screw 4 is used to adjust the connecting rod 3, ensuring that the connecting rod 3 is always in a vertical state.

[0067] Example 6

[0068] Based on embodiment 5, in this embodiment, an adjusting nut is threaded onto the adjusting screw 4, and the adjusting nut abuts against the side of the mounting plate away from the corresponding connecting rod 3.

[0069] The solution has a simple structure and a reasonable design. The adjusting nut is used to further fix the connecting rod 3, ensuring that the connecting rod 3 is always in a vertical state.

[0070] Example 7

[0071] Based on any one of Embodiments 2 to 6, in this embodiment, the connecting rod 3 includes an outer rod and an inner rod, the outer rod and the inner rod are distributed opposite to each other on both sides of the corresponding support leg 2, and are fixedly connected by a rotating shaft, and the rotating shaft is rotatably connected to the corresponding support leg 2; the upper ends of the two connecting rods 3 are respectively fixedly connected to one end of the crossbar 1; the limiting stop 5 is fixedly installed at the lower end of the corresponding inner rod.

[0072] The scheme has a simple structure, and the structure of the connecting rod 3 is reasonably designed, which can realize the connection between the connecting rod 3 and the support leg 2 and the crossbar 1, and is easy to assemble.

[0073] Preferably, in this embodiment, the inner rod and the outer rod are respectively made of bent rods, and their bending points are respectively fixedly connected to the rotating shaft.

[0074] Moreover, the angle of the aforementioned bending rod is 150°.

[0075] In addition, the upper part of the two support legs 2 is provided with a cavity, and the top of the two support legs 2 is open respectively; two rotating shafts pass through the top openings of the two support legs 2 respectively, and their two ends are rotatably connected to the two sides of the top of the two support legs 2 respectively.

[0076] Example 8

[0077] Based on Example 7, in this example, the length of the inner rod is less than the length of the outer rod.

[0078] The design is simple in structure, with reasonable lengths for the inner and outer rods, allowing for proper assembly of all components.

[0079] Example 9

[0080] Based on the above embodiments, in this embodiment, the crossbar 1 includes a long bar and a short bar. The long bar is rotatably mounted on the bracket; the short bar is fixedly mounted on one side of the long bar and is distributed parallel to the long bar.

[0081] The design is simple and the double-layer design of the crossbar 1 is reasonable. It can realize the assembly between the crossbar 1 and the bracket, and the contact between the crossbar 1 and the wire rope 9 on the drum 8, which is convenient for inspection.

[0082] Preferably, in this embodiment, the short rod and the long rod are connected by multiple fixed rods.

[0083] Example 10

[0084] Based on Example 9, in this example, the length of the long rod is greater than the length of the inner rod.

[0085] The solution has a simple structure and a reasonable design for the lengths of the outer rod and the short rod, which can both achieve detection and save materials.

[0086] The working principle of this utility model is as follows:

[0087] During the testing process, when the wire rope 9 on the drum 8 is not loose, the crossbar 1 is in contact with the wire rope 9 on the drum 8, triggering the limit device 7 to always detect the signal of the limit stop 5 and send the corresponding signal to the PLC controller.

[0088] When the wire rope 9 on the drum 8 becomes loose, the crossbar 1, under the force of the wire rope 9 on the drum 8, drives the limit stop 5 to swing through the linkage mechanism. The limit stop 5 separates from the trigger limit stop 7. At this time, the trigger limit stop 7 does not detect the signal of the limit stop 5, and the PLC controller does not receive the signal. At this time, manual intervention is required to deal with the loose wire rope 9 on the drum 8.

[0089] Based on the above scheme, in the above crossbar 1, the short bar is 2000mm long, the long bar is 4000mm long, and the inner and outer bars are 100mm in diameter respectively.

[0090] The support leg 2 has a height of 1000mm, a width of 100mm, and a thickness of 20mm;

[0091] The linkage mechanism has an angle of 150 degrees, with the upper part measuring 300mm and the lower part measuring 300mm.

[0092] The mounting plate in the adjusting nut has a width of 100mm and a thickness of 5mm;

[0093] The adjusting screw 4 is 100mm long and 5mm in diameter;

[0094] The length of the limit stop 5 is 300mm, and the curvature of the curved surface is 60 degrees;

[0095] The counterweight 6 has a length of 200mm, a width of 200mm, a height of 200mm, and a weight of 1000g.

[0096] The beneficial effects of this utility model are:

[0097] The double-layer crossbar of this utility model is closely attached to the wire rope drum. The outriggers support and swing the double-layer crossbar through a linkage mechanism. The linkage mechanism is connected to the limit stop 5. The adjusting nut presses against the linkage mechanism to keep it in a suitable position. The head of the limit stop 5 contacts the trigger limit 7, and the tail is connected to a counterweight. Under normal circumstances, the trigger limit is always conductive. If the wire rope on the drum becomes loose, it will spring open the double-layer crossbar, causing the linkage mechanism to rotate axially. This will drive the limit stop 5 away from the trigger limit 7, disconnecting the trigger limit, disengaging the equipment operation interlock, and stopping the equipment. This prevents the wire rope from becoming looser and protects the equipment and personnel.

[0098] This utility model has a simple structure and is easy to use. It can detect whether the wire rope on the drum is loose during operation, thus protecting the wire rope and the drum. It can also detect the loosening of the wire rope in time, preventing serious damage to the surrounding mechanism of the drum and the shore crane itself.

[0099] It should be noted that all electronic components involved in this utility model adopt existing technology, and all the above-mentioned components are electrically connected to the controller, and the control circuit between the controller and each component is existing technology.

[0100] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0101] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0102] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for detecting slack in a steel cable on a drum, characterized by: It includes a crossbar (1), a bracket, a trigger limiter (7), and a limit stop (5). The bracket is fixedly installed. The trigger limiter (7) is fixedly installed on the bracket. The crossbar (1) is rotatably installed on the bracket and is fixedly connected to the limit stop (5) through a linkage mechanism. The limit stop (5) is in contact with or separate from the trigger limiter (7). The trigger limiter (7) is used for communication connection with the PLC controller.

2. The device for detecting slack in a steel cord on a drum of claim 1, wherein: The bracket includes two legs (2), which are vertically fixed and distributed relative to each other. The linkage mechanism includes a connecting rod (10) and two connecting rods (3), which are rotatably mounted on the two legs (2). The two ends of the crossbar (1) are fixedly connected to the upper ends of the two connecting rods (3). The connecting rod (10) is fixedly mounted on the lower end of any one of the connecting rods (3), and the limiting stop (5) is fixedly mounted on one end of the connecting rod (10). The trigger limiting member (7) is fixedly mounted on the corresponding leg (2) and contacts or separates from the limiting stop (5).

3. The device for detecting slack wire rope on a drum of claim 2, wherein: The limiting stop (5) has an arc-shaped plate structure, and its protruding side contacts or separates from the trigger limiting member (7).

4. The device for detecting slack wire rope on a drum of claim 2, wherein: The other end of the connecting rod (10) is fixedly connected to a counterweight (6), and an adjustment component is installed on the corresponding support leg (2). The adjustment component abuts against the side of the connecting rod (3) away from the counterweight (6).

5. The device for detecting slack in a steel cord on a drum of claim 4, wherein: The adjustment assembly includes a mounting plate and an adjustment screw (4). The mounting plate is fixedly mounted on the corresponding support leg (2). The adjustment screw (4) is horizontally positioned and threadedly connected to the mounting plate. One end of the adjustment screw (4) abuts against the corresponding connecting rod (3).

6. The device for detecting slack in a steel cord on a drum of claim 5, wherein: An adjusting nut is threaded onto the adjusting screw (4), and the adjusting nut abuts against the side of the mounting plate away from the corresponding connecting rod (3).

7. The device for detecting slack in a steel cord on a drum of claim 2, wherein: The connecting rod (3) includes an outer rod and an inner rod. The outer rod and the inner rod are distributed on opposite sides of the corresponding support leg (2) and are fixedly connected by a rotating shaft. The rotating shaft is rotatably connected to the corresponding support leg (2). The upper ends of the two connecting rods (3) are respectively fixedly connected to one end of the crossbar (1). The limiting stop (5) is fixedly installed at the lower end of the corresponding inner rod.

8. The device for detecting slack in a steel cord on a drum of claim 7, wherein: The length of the inner rod is less than the length of the outer rod.

9. The device for detecting the loosening of the steel wire rope on the drum according to any one of claims 1-8, characterized in that: The crossbar (1) includes a long bar and a short bar. The long bar is rotatably mounted on the bracket. The short bar is fixedly mounted on one side of the long bar and is distributed parallel to the long bar.

10. The device for detecting slack in a steel cord on a drum of claim 9, wherein: The length of the long rod is greater than the length of the short rod.

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