Steel wire rope monitoring device and method

Abstract

The invention discloses a steel wire rope monitoring device and method, and the device comprises a balance structure which is rotatably disposed in an arm cylinder, the two ends of the balance structure are connected with the connecting end of one steel wire rope, and the balance structure is provided with a trigger structure; the sensor device is arranged in the arm cylinder; the trigger structure triggers the sensor device when the balance structure rotates forward and / or backward by a preset trigger threshold angle. State detection of different steel wire rope abnormal conditions can be achieved, alarming is triggered, the accuracy and reliability of safety monitoring of the steel wire rope assembly are improved, the safety guarantee of a telescopic system of the overhead working truck is further improved, and the life safety of operators is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of aerial work vehicle accessories, and in particular to a wire rope monitoring device and method. Background Art

[0002] As a manned working tool, the safety of aerial work vehicles is particularly important, especially when the aerial work vehicles are extended and retracted with loads, which requires high safety, stability and reliability of the telescopic system. At present, the telescopic arm of aerial work vehicles is generally achieved through telescopic cylinders and wire rope assemblies. Therefore, it is necessary to judge the real-time working conditions of the wire rope assembly to determine the safety of the loaded operation.

[0003] At present, a mounting plate compression spring equipped with a proximity switch is generally provided at the tail end of a wire rope assembly as a rope break detection device, so that the real-time working condition of the wire rope assembly can be judged. When the wire rope fails and breaks, the spring works to push open the mounting plate, so that the proximity switch is separated from the effective distance of the detection plate and an alarm signal is output. However, in the case of unilateral rope breakage, the mounting plate on the unbroken side remains in a compressed state. If the spring force is too small, the proximity switch may not be pushed open, resulting in the inability to detect the unilateral rope break, posing a safety hazard. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a wire rope monitoring device and method, which can realize status monitoring of different wire rope abnormal conditions and trigger alarms, thereby improving the accuracy and reliability of safety monitoring of wire rope components.

[0005] According to the wire rope monitoring device of the first embodiment of the present application, there are two wire ropes, each of which is arranged along the length direction of the arm tube and arranged on both sides of the arm tube;

[0006] The wire rope monitoring device comprises:

[0007] A balancing structure is rotatably arranged in the arm tube, two ends of the balancing structure are respectively connected to a connecting end of the steel wire rope, and a trigger structure is arranged on the balancing structure;

[0008] A sensor device is arranged in the arm tube; when the balancing structure rotates forward and / or reversely by a preset trigger threshold angle, the trigger structure triggers the sensor device.

[0009] According to some embodiments of the present application, the balancing structure includes:

[0010] A balance block is rotatably arranged in the arm tube, and both ends of the balance block are provided with a through hole for one of the steel wire ropes to pass through;

[0011] The detection plate is arranged on the balancing block.

[0012] According to some embodiments of the present application, the wire rope monitoring device further includes:

[0013] The bracket is arranged in the arm tube, and the balance block is rotatably arranged on the bracket.

[0014] According to some embodiments of the present application, an axial hole is provided in the middle of the balancing block, and the balancing structure further comprises:

[0015] A balancing shaft passes through the shaft hole and is connected to the balancing block. One end of the balancing shaft is rotatably connected to the bracket, and the other end of the balancing shaft is connected to the detection plate.

[0016] According to some embodiments of the present application, the balancing shaft is connected to the balancing weight via a key.

[0017] According to some embodiments of the present application, the sensor device adopts a contact sensor.

[0018] According to some embodiments of the present application, the detection plate is a circular plate with an arc notch, the contact sensor is arranged in the arm tube, and the contact of the contact sensor is arranged in the arc notch.

[0019] According to some embodiments of the present application, the wire rope monitoring device further includes:

[0020] The anti-rotation structure is used to prevent the two steel wire ropes from rotating.

[0021] According to some embodiments of the present application, each connecting end of the steel wire rope is provided with an anti-rotation hole, and the anti-self-rotation structure includes:

[0022] An anti-rotation rod passes through the anti-rotation holes of the two steel wire rope connection ends.

[0023] According to the wire rope monitoring method of the second embodiment of the present application, there are two wire ropes, each of which is arranged along the length direction of the arm tube and arranged on both sides of the arm tube; a balancing structure and a sensor device are arranged in the arm tube; the balancing structure can be rotatably arranged in the arm tube, and the two ends of the balancing structure are respectively connected to the connecting ends of one of the wire ropes, and a trigger structure is arranged on the balancing structure; the sensor device is arranged in the arm tube; when the balancing structure rotates forward and / or reversely by a preset trigger threshold angle, the trigger structure triggers the sensor device;

[0024] The wire rope monitoring method comprises:

[0025] Get the trigger status signal;

[0026] In case the trigger status signal indicates that the trigger structure triggers the sensor device, an alarm signal is generated.

[0027] In the embodiment of the present application, the two ends of the balance structure are respectively connected to a steel wire rope. When any of the steel wire ropes is loose or broken, the balance structure will be caused to rotate, and then the sensor device is triggered by the trigger structure arranged on the balance structure. When the acquired trigger state signal indicates that the trigger structure triggers the sensor device, a safety alarm is triggered, thereby realizing the monitoring of the health status of the steel wire rope. The steel wire rope monitoring device and method of the embodiment of the present application can realize normal detection and trigger alarm for the fault conditions of single-sided or double-sided broken ropes, thereby improving the accuracy and reliability of the safety monitoring of the steel wire rope assembly, further improving the safety protection of the telescopic system of the aerial work vehicle, and ensuring the life safety of the operators.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 This is a schematic diagram of the structure of a wire rope monitoring device according to an embodiment of the present application;

[0031] Figure 2 A side view of a schematic structural diagram of a wire rope monitoring device according to an embodiment of the present application;

[0032] Figure 3 A side view of a structural schematic diagram of a wire rope monitoring device according to another embodiment of the present application.

[0033] Reference numerals:

[0034] Steel wire rope 100, fixing nut 110,

[0035] Balance block 210, balance shaft 220, detection plate 230, snap ring 240,

[0036] The bracket 300, the first panel 310, the second panel 320, the side panel 330,

[0037] Sensor device 400,

[0038] The anti-rotation rod 510 and the fixed cotter pin 520 . DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0040] In the description of this application, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the description of the present application, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In the description of this application, it should be noted that, unless otherwise clearly stated, terms such as limitation, setting, installation, connection, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0043] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments.

[0044] Figure 1 This is a schematic diagram of the structure of a wire rope monitoring device according to an embodiment of the present application; Figure 2 A side view of a schematic structural diagram of a wire rope monitoring device according to an embodiment of the present application; Figure 3 This is a side view of a schematic diagram of the structure of another embodiment of the wire rope monitoring device of the present application. The wire rope monitoring device is applied to the wire rope assembly for the telescopic boom in the arm tube of the aerial work vehicle. Figures 1 to 3 , the embodiments of the present application are further described.

[0045] refer to Figure 1 As shown, the embodiment of the present application provides a wire rope monitoring device, wherein there are two wire ropes 100, each of which is arranged along the length direction of the arm tube and arranged on both sides of the arm tube;

[0046] The wire rope monitoring device includes a balancing structure and a sensor device 400;

[0047] The balancing structure is rotatably arranged in the arm tube, and both ends of the balancing structure are respectively connected to the connecting ends of a steel wire rope 100, and a trigger structure is arranged on the balancing structure;

[0048] The sensor device 400 is arranged in the arm tube; when the balancing structure rotates forward and / or reversely by a preset trigger threshold angle, the trigger structure triggers the sensor device 400.

[0049] In this embodiment, the two ends of the balance structure are respectively connected to a steel wire rope 100. When any of the steel wire ropes 100 is loose or broken, the balance structure will be caused to rotate, and then the sensor device 400 is triggered by the trigger structure set on the balance structure to trigger the safety alarm, thereby realizing the monitoring of the health status of the steel wire rope. The steel wire rope monitoring device of the embodiment of the present application can realize normal detection and trigger alarm for the fault conditions of single-sided or double-sided broken ropes, thereby improving the accuracy and reliability of the safety monitoring of the steel wire rope assembly, further improving the safety protection of the telescopic system of the aerial work vehicle, and ensuring the life safety of the operators.

[0050] The above-mentioned arm tube is the arm tube of an aerial work vehicle.

[0051] The preset trigger threshold angle can be understood as when the balance structure rotates to a certain extent, it can be judged that the steel wire rope 100 is abnormal, causing the balance structure to rotate to the preset trigger threshold angle. The preset trigger threshold angle can be set according to actual conditions.

[0052] like Figures 1 to 3 As shown, in some embodiments, the balancing structure includes a balancing block 210 and a detection plate 230;

[0053] The balance block 210 is rotatably disposed in the arm tube, and both ends of the balance block 210 are provided with through holes for a steel wire rope 100 to pass through;

[0054] The detection plate 230 is disposed on the balancing block 210 .

[0055] In the present embodiment, through holes are provided at both ends of the balance block 210, and the two steel wire ropes 100 respectively pass through the through holes at one end and are connected to the balance block 210. Therefore, when one of the steel wire ropes 100 shows signs of loosening or breaking, it will cause the balance block 210 to rotate. The detection plate 230 provided on the balance block 210 serves as a trigger structure and will also move with the rotation of the balance block 210. When the balance block 210 rotates forward and / or reversely at a preset trigger threshold angle, the detection plate 230 triggers the sensor device 400, triggering a safety alarm, thereby realizing the monitoring of the health status of the steel wire rope.

[0056] like Figure 1As shown, in some embodiments, the balancing block 210 can be an axisymmetric structure, and the through holes at both ends are also opened at symmetrical positions, so as to maintain force balance after connecting two steel wire ropes 100 at both ends. After the two steel wire ropes 100 pass through the corresponding through holes and are fixed to the balancing block 210, the two steel wire ropes 100 are arranged in parallel, and the steel wire ropes 100 and the balancing block 210 are arranged vertically.

[0057] like Figures 1 to 3 As shown, in some embodiments, the connecting end of the wire rope 100 is provided with a threaded section. After the wire rope 100 passes through the through hole of the balance block 210, a fixing nut 110 is sleeved on the threaded section and tightened to fix it. The tension of the wire rope 100 can also be adjusted by the fixing nut 110, thereby facilitating the balance block 210 to achieve force balance.

[0058] like Figures 1 to 3 As shown, in some embodiments, the wire rope monitoring device further includes a bracket 300;

[0059] The bracket 300 is disposed in the arm tube, and the balancing weight 210 is rotatably disposed on the bracket 300 .

[0060] In this embodiment, the bracket 300 is fixedly disposed in the arm tube, and the bracket 300 facilitates the stable installation of the balance block 210, and further facilitates the installation of the wire rope 100 fixed on the balance block 210. In some cases, the bracket 300 is welded to the arm tube.

[0061] like Figures 1 to 3 As shown, in some embodiments, a shaft hole is provided in the middle of the balancing block 210, and the balancing structure further includes a balancing shaft 220;

[0062] The balancing shaft 220 passes through the shaft hole and is connected to the balancing block 210 . One end of the balancing shaft 220 is rotatably connected to the bracket 300 , and the other end of the balancing shaft 220 is connected to the detection plate 230 .

[0063] In this embodiment, the balancing block 210 is rotatably set on the bracket 300 through the balancing shaft 220. One end of the balancing shaft 220 is rotatably connected to the bracket 300, and the other end of the balancing shaft 220 is fixedly connected to the detection plate 230, and the whole is fixedly connected to the balancing block 210. When the wire rope 100 shows signs of loosening or breaking, resulting in unbalanced force, the balancing shaft 220, the balancing block 210 and the detection plate 230 will rotate relative to the bracket 300.

[0064] In some embodiments, the balancing shaft 220 is connected to the balancing weight 210 via a key.

[0065] In the present embodiment, a key connection is adopted between the balancing shaft 220 and the balancing block 210, which has a simple structural design, reliable operation, relatively easy manufacturing process, low manufacturing cost, and can effectively transmit the torque of the shaft with large torque transmission. The key connection can change the shape and size of the keyway as needed to adapt to different shaft diameters and loads, and has good adaptability.

[0066] In some embodiments, a keyway is provided on the balancing shaft 220 , and a keyway is correspondingly provided on the inner side of the shaft hole of the balancing weight 210 . A standard key is stuck in the keyway, thereby achieving a key connection between the balancing shaft 220 and the balancing weight 210 .

[0067] In some embodiments, the sensor device 400 employs a contact sensor.

[0068] In this embodiment, the sensor device 400 uses a contact sensor. When the balance block 210 rotates to drive the detection plate 230 to rotate, and then touches the contact sensor, the contact sensor can convert the contact of the object on the sensor into a triggering electrical signal, thereby triggering a safety alarm, reminding the operator that the wire rope 100 is abnormal and needs to be checked, tightened or replaced, thereby realizing the monitoring of the health status of the wire rope. The contact sensor has a simple structure, fast response speed, strong durability, low cost, high sensitivity, and is widely used in various application scenarios.

[0069] The contact sensor can use a mechanical contact switch, and the monitoring device using mechanical transmission plus mechanical contact switch is safer and more effective than other detection devices. The relaxation state of the wire rope 100 during the alarm, that is, the failure tightness of the wire rope 100, can be set by adjusting the range of the contact switch contact.

[0070] like Figure 1 As shown, in some embodiments, the detection plate 230 is a circular plate with an arc notch, the contact sensor is disposed in the arm tube, and the contact of the contact sensor is disposed in the arc notch.

[0071] In this embodiment, the detection plate 230 is a circular plate with an arc notch, and the contact of the contact sensor is set in the arc notch. When the detection plate 230 rotates, the position of the arc notch moves accordingly. The contact of the contact sensor originally located in the arc notch is contacted and squeezed by other non-notch parts of the circular plate, triggering a safety alarm.

[0072] The arc notch can be used to set the relaxation state of the wire rope 100 during alarm, that is, the failure tightness of the wire rope 100, by selecting arc angles of different sizes.

[0073] like Figure 3As shown, in some embodiments, the bracket 300 can be a semi-enclosed structure, having a first panel 310, a second panel 320 and a side panel 330, the balancing block 210 is semi-enclosed by the first panel 310, the second panel 320 and the side panel 330, and a through hole for the balancing shaft 220 to pass through is opened at the positions corresponding to the positions where the axial holes of the balancing block 210 are opened on the first panel 310 and the second panel 320 of the bracket 300, and the end of the balancing shaft 220 close to the first panel 310 is fixed by a clamping ring 240, and the end close to the second panel 320 is installed with a detection plate 230. The bracket 300 with a semi-enclosed structure can limit the rotation range of the balancing block 210 to a certain extent, and can prevent the balancing block 210 from rotating significantly when the wire rope 100 on one side shows signs of loosening or breaking, so as to avoid causing serious adverse effects on the normal wire rope 100 on the other side.

[0074] like Figure 1 As shown, in some embodiments, the contact sensor includes a contact and a contact seat, wherein the contact seat can be fixedly disposed on the bracket 300, specifically, the contact seat can be disposed on the second panel 320 of the bracket 300, and the contact is buried in the arc notch of the detection plate 230.

[0075] In some embodiments, the wire rope monitoring device further includes an anti-rotation structure;

[0076] The anti-rotation structure is used to prevent the two steel wire ropes 100 from rotating.

[0077] In this embodiment, the anti-rotation structure is used to prevent the wire rope 100 from rotating and then causing the wire rope 100 to unwind. The anti-rotation structure can be a structure that fixes the wire ropes 100 on each side to the balance block 210, or a structure that fixes the two wire ropes 100 relatively.

[0078] like Figures 1 to 3 As shown, in some embodiments, the connection end of each steel wire rope 100 is provided with an anti-rotation hole, and the anti-rotation structure includes an anti-rotation rod 510;

[0079] The anti-rotation rod 510 passes through the anti-rotation hole at the connection end of the two steel wire ropes 100.

[0080] In this embodiment, the anti-rotation structure adopts an anti-rotation rod 510, and the anti-rotation rod 510 passes horizontally between the two steel wire ropes 100, that is, passes through the anti-rotation holes at the connecting ends of the two steel wire ropes 100. This can effectively prevent the steel wire ropes 100 from self-rotating and spreading when subjected to rotational force, thereby improving the safety of the steel wire ropes and increasing the service life of the steel wire ropes 100.

[0081] like Figure 1 and Figure 3As shown, in some embodiments, both ends of the anti-rotation rod 510 are provided with fixing holes, and fixing cotter pins 520 are inserted into the fixing holes.

[0082] In this embodiment, by opening fixing holes at both ends of the anti-rotation rod 510 and then inserting the fixing cotter pin 520 for fixing, the anti-rotation rod 510 can be prevented from escaping from the anti-rotation hole of the wire rope 100, thereby achieving further fixation.

[0083] The embodiment of the present application also proposes a wire rope monitoring method, wherein there are two wire ropes 100, each of which is arranged along the length direction of the arm tube and arranged on both sides of the arm tube; a balancing structure and a sensor device 400 are arranged in the arm tube; the balancing structure is rotatably arranged in the arm tube, and both ends of the balancing structure are respectively connected to the connecting ends of a wire rope 100, and a trigger structure is arranged on the balancing structure; the sensor device 400 is arranged in the arm tube; when the balancing structure rotates forward and / or reversely by a preset trigger threshold angle, the trigger structure triggers the sensor device 400;

[0084] Wire rope monitoring methods, including:

[0085] Get the trigger status signal;

[0086] In case the trigger status signal indicates that the trigger structure triggers the sensor device 400 , an alarm signal is generated.

[0087] In this embodiment, the two ends of the balance structure are connected to a steel wire rope 100 respectively. When any of the steel wire ropes 100 is loose or broken, the balance structure will be caused to rotate, and then the sensor device 400 is triggered by the trigger structure arranged on the balance structure. When the acquired trigger state signal indicates that the trigger structure triggers the sensor device 400, a safety alarm is triggered, thereby realizing the monitoring of the health status of the steel wire rope. The steel wire rope monitoring method of the embodiment of the present application can realize normal detection and trigger alarm for the fault conditions of single-sided or double-sided broken ropes, thereby improving the accuracy and reliability of the safety monitoring of the steel wire rope assembly, further improving the safety protection of the telescopic system of the aerial work vehicle, and ensuring the life safety of the operators.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0089] Although the embodiments of the present application are described in detail above in conjunction with the accompanying drawings, the present application is not limited to the above embodiments. A person of ordinary skill in the art can understand that various changes, modifications, substitutions and deformations can be made to these embodiments without departing from the principle and purpose of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A wire rope monitoring device, characterized in that: There are two steel wire ropes, each of which is arranged along the length direction of the arm tube and on both sides of the arm tube; The wire rope monitoring device comprises: A balancing structure is rotatably arranged in the arm tube, two ends of the balancing structure are respectively connected to a connecting end of the steel wire rope, and a trigger structure is arranged on the balancing structure; A sensor device is arranged in the arm tube; When the balancing structure rotates forward and / or reversely by a preset trigger threshold angle, the trigger structure triggers the sensor device.

2. The wire rope monitoring device according to claim 1, characterized in that: The balancing structure comprises: A balance block is rotatably arranged in the arm tube, and both ends of the balance block are provided with a through hole for one of the steel wire ropes to pass through; The detection plate is arranged on the balancing block.

3. The wire rope monitoring device according to claim 2, characterized in that: The wire rope monitoring device also includes: The bracket is arranged in the arm tube, and the balance block is rotatably arranged on the bracket.

4. The wire rope monitoring device according to claim 3, characterized in that: The middle part of the balancing block is provided with an axial hole, and the balancing structure further comprises: A balancing shaft passes through the shaft hole and is connected to the balancing block. One end of the balancing shaft is rotatably connected to the bracket, and the other end of the balancing shaft is connected to the detection plate.

5. The wire rope monitoring device according to claim 4, characterized in that: The balancing shaft is connected to the balancing weight via a key.

6. The wire rope monitoring device according to claim 2, characterized in that: The sensor device adopts a contact type sensor.

7. The wire rope monitoring device according to claim 6, characterized in that: The detection plate is a circular plate with an arc notch, the contact sensor is arranged in the arm tube, and the contact of the contact sensor is arranged in the arc notch.

8. The wire rope monitoring device according to claim 1, characterized in that: The wire rope monitoring device also includes: The anti-rotation structure is used to prevent the two steel wire ropes from rotating.

9. The wire rope monitoring device according to claim 8, characterized in that: Each connecting end of the steel wire rope is provided with an anti-rotation hole, and the anti-rotation structure comprises: An anti-rotation rod passes through the anti-rotation holes of the two steel wire rope connection ends.

10. A wire rope monitoring method, characterized in that: There are two steel wire ropes, each of which is arranged along the length direction of the arm tube and arranged on both sides of the arm tube; a balancing structure and a sensor device are arranged in the arm tube; the balancing structure can be rotatably arranged in the arm tube, and the two ends of the balancing structure are respectively connected to the connecting end of one of the steel wire ropes, and a trigger structure is arranged on the balancing structure; the sensor device is arranged in the arm tube; When the balancing structure rotates forward and / or reversely by a preset trigger threshold angle, the trigger structure triggers the sensor device; The wire rope monitoring method comprises: Get the trigger status signal; In case the trigger status signal indicates that the trigger structure triggers the sensor device, an alarm signal is generated.

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