Anti-hacking oil cylinder position detection system and container bridge crane
By using laser sensors and PLC units to detect the position of anti-snagging tank cylinders in container cranes, the problems of high cost and difficult maintenance of magnetic rulers have been solved, achieving efficient and low-cost position detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN HAIRUN CONTAINER TERMINAL CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-05
AI Technical Summary
Using magnetic rulers to detect the position of anti-snagging tank cylinders in existing container cranes is costly and difficult to maintain.
Laser sensors and PLC units are used to replace magnetic rulers. The extension and retraction distance of the anti-attachment tank cylinder is obtained by laser ranging, and the PLC unit makes accurate judgments, reducing costs and maintenance difficulty.
It enables accurate detection of the anti-collision tank cylinder position, reduces usage and maintenance costs, and improves operational efficiency.
Smart Images
Figure CN224199035U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of container gantry cranes, specifically to an anti-snagging hull cylinder position detection system and a container gantry crane. Background Technology
[0002] Container quay cranes, also known as container quay cranes, are crucial loading and unloading equipment at container terminals, playing a central role in the terminal's logistics operations. They are primarily responsible for lifting containers from ships to the quay platform or directly transferring them to the container yard. Their operational efficiency and performance directly impact the terminal's throughput capacity and operational benefits.
[0003] A container gantry crane consists of several key components. The gantry, serving as the supporting foundation for the entire system, moves steadily along the terminal tracks, providing a stable support platform for the gantry. Spanning the terminal's edge like a giant beam, the gantry carries the traveling trolley, which moves horizontally across it. The traveling trolley, carrying the spreader, flexibly navigates the gantry, precisely positioning itself to the target container according to operational needs. The hoisting mechanism is responsible for raising and lowering the spreader, using a powerful power system to achieve rapid and stable container lifting. The spreader is the part that directly contacts the container.
[0004] The anti-snagging cylinder is a crucial subsystem in the lifting chain of a container crane, enabling tilting operations and protecting against snagging. It is located in the multi-functional hydraulic station on the rear beam of the crane. In existing multi-functional hydraulic stations, the anti-snagging cylinder is the actuator, and the magnetic scale is the detection element. The position of the anti-snagging cylinder is detected by the magnetic scale. However, the magnetic scale is expensive and difficult to inspect and maintain, resulting in excessively high operating costs. Utility Model Content
[0005] The purpose of this invention is to provide an anti-snagging hydraulic cylinder position detection system and a container crane, aiming to improve the problem of excessively high usage costs caused by the conventional use of magnetic rulers for detection, which are expensive and difficult to inspect and maintain.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An anti-hitching cylinder position detection system includes an anti-hitching cylinder, a laser sensor, a reflector, and a PLC unit;
[0008] The anti-collision cylinder is hinged in the middle to the cylinder platform, and the telescopic end of the anti-collision cylinder is hinged in the middle of the wire rope tensioning mechanism. The reflector is fixed on the side of the wire rope tensioning mechanism facing the anti-collision cylinder. The laser sensor is fixed on the circumferential side of the anti-collision cylinder, and the emitting end of the laser sensor faces the reflector. The output end of the laser sensor is electrically connected to the PLC unit.
[0009] Furthermore, it also includes a protective cover, the bottom of which is fixedly connected to the circumferential side of the anti-attachment tank cylinder. An installation platform is provided inside the protective cover, and the bottom of the laser sensor is fixed on the installation platform. A detection opening is provided on one side of the protective cover, which corresponds to the position of the emitting end of the laser sensor.
[0010] Furthermore, the protective cover has a wiring notch on its side, which is connected to the detection opening.
[0011] Furthermore, the laser sensor is fixed directly above the circumferential side of the anti-attachment tank cylinder, and the reflector is located directly above the hinge position of the telescopic end of the anti-attachment tank cylinder.
[0012] Furthermore, a rear beam is fixed on the cylinder platform, and the wire rope tensioning mechanism includes a tensioning rod and a tensioning wheel. The top end of the tensioning rod is hinged to the rear beam, the telescopic end of the anti-snagging tank cylinder is hinged to the middle of one side of the tensioning rod, the reflector is fixed to the tensioning rod, the tensioning wheel is rotatably connected to the bottom end of the tensioning rod, and a wire rope is wound on the tensioning wheel. The wire rope is connected to the lifting device.
[0013] Furthermore, the PLC unit includes an analog input module and a logic control module. The output terminal of the laser sensor is electrically connected to the input terminal of the analog input module. The laser sensor outputs an analog signal to the analog input module, and the output terminal of the analog input module is electrically connected to the logic control module.
[0014] To achieve the above objectives, the present invention adopts the following technical solution:
[0015] A container crane that utilizes the aforementioned anti-snagging hull cylinder position detection system.
[0016] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:
[0017] The laser sensor is located around the anti-snagging cylinder. It emits a laser beam onto a reflector on the wire rope tensioning mechanism. The laser-measured distance is converted into an analog signal and output to the PLC unit. The PLC unit obtains the extension and retraction distance of the anti-snagging cylinder through the laser ranging analog signal, thereby accurately judging the movement of the wire rope tensioning mechanism. This ensures accurate judgment of the anti-snagging cylinder and guarantees that the hook can accurately engage with the container. At the same time, it avoids the use of magnetic rulers for distance measurement, reducing operating and maintenance costs. Attached Figure Description
[0018] Figure 1 This is a diagram showing the maximum stroke state of the anti-collision tank cylinder position detection system described in this utility model;
[0019] Figure 2This is a minimum stroke state diagram of the anti-attachment tank cylinder position detection system of this utility model;
[0020] Figure 3 This is a circuit diagram of the anti-attachment tank cylinder position detection system of this utility model;
[0021] Figure 4 This is a schematic diagram of the laser sensor structure of the anti-attachment tank cylinder position detection system of this utility model;
[0022] Figure 5 This is a schematic diagram of the laser sensor installation in the anti-attachment tank cylinder position detection system of this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Anti-scratching cylinder; 11. Protective cover; 111. Mounting platform; 112. Detection opening; 113. Cable routing gap;
[0025] 2. Laser sensor;
[0026] 3. Reflector;
[0027] 4. PLC unit; 41. Analog input module; 42. Logic control module;
[0028] 5. Hydraulic cylinder platform;
[0029] 6. Rear beam;
[0030] 7. Wire rope tensioning mechanism; 71. Tensioning rod; 72. Tensioning wheel. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0032] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element of this utility model must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0033] When an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to," it can be directly connected to or indirectly connected to that other element.
[0034] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example
[0035] Please refer to Figure 1-5 As shown, this embodiment provides an anti-hook cylinder position detection system, including an anti-hook cylinder 1, a laser sensor 2, a reflector 3, and a PLC unit 4. The middle part of the anti-hook cylinder 1 is hinged to the cylinder platform 5, and the telescopic end of the anti-hook cylinder 1 is hinged to the middle part of the wire rope tensioning mechanism 7. The reflector 3 is fixed to the side of the wire rope tensioning mechanism 7 facing the anti-hook cylinder 1. The laser sensor 2 is fixed to the circumferential side of the anti-hook cylinder 1, and the emitting end of the laser sensor 2 faces the reflector 3. The output end of the laser sensor 2 is electrically connected to the PLC unit 4.
[0036] The laser sensor 2 is located around the anti-snagging cylinder 1. It emits a laser to the reflector 3 on the wire rope tensioning mechanism 7. The laser-measured distance is converted into an analog signal and output to the PLC unit 4. The PLC unit 4 obtains the extension and retraction distance of the anti-snagging cylinder 1 through the laser distance measurement analog signal, thereby accurately judging the movement of the wire rope tensioning mechanism 7 and accurately judging the anti-snagging cylinder 1. This ensures that the hook can accurately engage with the container, while avoiding the use of a magnetic ruler for distance measurement, thus reducing operating and maintenance costs.
[0037] Please refer to Figure 5 As shown, the anti-attacking cylinder 1 position detection system further includes a protective cover. The bottom of the protective cover is fixedly connected to the circumferential side of the anti-attacking cylinder 1. An installation platform 111 is provided inside the protective cover, and the bottom of the laser sensor 2 is fixed on the installation platform 111. A detection opening 112 is provided on one side of the protective cover, corresponding to the position of the emitting end of the laser sensor 2. The protective cover shields and protects the laser sensor 2, preventing external interference light from entering the receiving end of the laser sensor 2 and affecting the accuracy of laser ranging. The laser emitted by the emitting end of the laser sensor 2 passes through the detection opening 112, hits the reflector 3, and is reflected back to the laser sensor 2 after reflection by the reflector 3, thus completing the detection of the extension and retraction distance of the anti-attacking cylinder 1.
[0038] Furthermore, a wiring notch 113 is provided on the side of the protective cover. The wiring notch 113 is connected to the detection opening 112, which maximizes the opening range of the wiring notch 113 and the detection opening 112, ensuring that the laser can accurately return to the laser sensor 2, and providing maximum wiring space for the connecting wires of the laser sensor 2 and the PLC unit 4, so as to avoid the connecting wires affecting the operation of the laser sensor 2.
[0039] Please refer to Figure 1 and Figure 2 As shown, specifically, laser sensor 2 is fixed directly above the circumferential side of anti-attacking tank cylinder 1, and reflector 3 is located directly above the hinge position of the telescopic end of anti-attacking tank cylinder 1. The telescopic end of anti-attacking tank cylinder 1 moves in a straight line, but the hinge position may experience slight lateral displacement due to mechanical clearances, such as lateral swaying or rotation. Laser sensor 2, located directly above it, has its optical path direction aligned with the telescopic direction of anti-attacking tank cylinder 1, enabling direct measurement of axial displacement and avoiding interference from lateral displacement on the measurement results. Installing laser sensor 2 on the side is also avoided, as lateral displacement can cause the optical path to tilt or deviate from reflector 3, resulting in measurement errors.
[0040] Specifically, a rear beam 6 is fixed on the cylinder platform 5. The wire rope tensioning mechanism 7 includes a tensioning rod 71 and a tensioning wheel 72. The top end of the tensioning rod 71 is hinged to the rear beam 6. The telescopic end of the anti-snagging cylinder 1 is hinged to the middle of one side of the tensioning rod 71. The reflector 3 is fixed to the tensioning rod 71. The tensioning wheel 72 is rotatably connected to the bottom end of the tensioning rod 71. A wire rope is wound on the tensioning wheel 72 and connected to the lifting device. The tensioning wheel 72 is driven to tension the wire rope. The anti-snagging cylinder 1 pushes the tensioning rod 71 to move. The tensioning rod 71 rotates with its top hinged position as the center. The position of the lifting device is adjusted through the tensioning wheel 72 and the wire rope.
[0041] Please refer to Figure 3 As shown, specifically, PLC unit 4 includes an analog input module 41 and a logic control module 42. The output terminal of laser sensor 2 is electrically connected to the input terminal of analog input module 41. Laser sensor 2 outputs an analog signal to analog input module 41, and the output terminal of analog input module 41 is electrically connected to logic control module 42. The control logic module confirms the extension and retraction of anti-attachment cylinder 1 through the analog signal, thereby accurately controlling anti-attachment cylinder 1.
[0042] In this embodiment, the laser sensor 2 is electrically connected to the analog input module 41 via a shielded cable to avoid external interference and improve the accuracy of measuring the extension and retraction of the anti-attachment tank cylinder 1.
[0043] This embodiment also discloses a container crane that uses the above-mentioned anti-snagging hull cylinder 1 position detection system.
[0044] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A system for detecting the position of an anti-collision nacelle cylinder, characterized in that, Includes anti-attachment tank cylinders, laser sensors, reflectors, and PLC units; The anti-collision cylinder is hinged in the middle to the cylinder platform, and the telescopic end of the anti-collision cylinder is hinged in the middle of the wire rope tensioning mechanism. The reflector is fixed on the side of the wire rope tensioning mechanism facing the anti-collision cylinder. The laser sensor is fixed on the circumferential side of the anti-collision cylinder, and the emitting end of the laser sensor faces the reflector. The output end of the laser sensor is electrically connected to the PLC unit.
2. The anti-attachment tank cylinder position detection system according to claim 1, characterized in that: It also includes a protective cover, the bottom of which is fixedly connected to the circumferential side of the anti-attachment tank cylinder. An installation platform is provided inside the protective cover, and the bottom of the laser sensor is fixed on the installation platform. A detection opening is provided on one side of the protective cover, which corresponds to the position of the emitting end of the laser sensor.
3. The anti-attachment tank cylinder position detection system according to claim 2, characterized in that: The protective cover has a wiring notch on its side, which is connected to the detection opening.
4. The anti-attachment tank cylinder position detection system according to claim 1, characterized in that: The laser sensor is fixed directly above the circumferential side of the anti-attachment cylinder, and the reflector is located directly above the hinge position of the telescopic end of the anti-attachment cylinder.
5. The anti-attachment tank cylinder position detection system according to claim 1, characterized in that: A rear beam is fixed on the cylinder platform. The wire rope tensioning mechanism includes a tensioning rod and a tensioning wheel. The top end of the tensioning rod is hinged to the rear beam. The telescopic end of the anti-snagging tank cylinder is hinged to the middle of one side of the tensioning rod. The reflector is fixed to the tensioning rod. The tensioning wheel is rotatably connected to the bottom end of the tensioning rod. A wire rope is wound on the tensioning wheel. The wire rope is connected to the lifting device.
6. The anti-attachment tank cylinder position detection system according to claim 1, characterized in that: The PLC unit includes an analog input module and a logic control module. The output terminal of the laser sensor is electrically connected to the input terminal of the analog input module. The laser sensor outputs an analog signal to the analog input module. The output terminal of the analog input module is electrically connected to the logic control module.
7. A container bridge crane, characterized in that, The anti-hitching tank cylinder position detection system described in any one of claims 1-6 is applied.