Safety protection device of quay crane pitching mechanism
By installing an inductive limiter in series with the mechanical limiter in the quay crane pitching mechanism, the problem of the mechanical limiter becoming insensitive after long-term use is solved, dual monitoring and alarm of the wire rope are achieved, and the safety and reliability of the equipment are improved.
Patent Information
- Application Number
- CN202422742436.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-11
AI Technical Summary
In the existing quay crane pitching mechanism, the mechanical limiter becomes insensitive after long-term use, which may cause the wire rope to become disordered, posing a serious safety hazard.
An inductive limiter is installed in series with a mechanical limiter in the pitching mechanism of the quay crane to form a double limit protection, ensuring effective monitoring and alarm when the mechanical limiter fails, thereby avoiding the phenomenon of wire rope disorder.
The safety performance of the quay crane pitching mechanism is improved, safety accidents caused by failure of mechanical limiters are avoided, and the safe and reliable operation of the equipment is ensured under extreme conditions.
Smart Images
Figure CN223480648U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of safety devices for pitching mechanisms, and specifically to a safety protection device for the pitching mechanism of a quay crane. Background Technology
[0002] Ports are crucial nodes for the transfer of goods between waterways and land transportation. Through ports, goods can be transferred from sea to land transportation (such as rail and road), or vice versa, thus achieving the effective spatial transfer of goods. This is the most basic function of a port and the foundation of its role as a logistics hub. As an important gateway for international trade, ports handle a large volume of import and export goods. These goods undergo loading, unloading, storage, distribution, and customs clearance at ports, ensuring the smooth operation of international trade. Ports not only provide necessary logistics facilities and services for international trade but also promote international economic exchange and cooperation.
[0003] The quay crane's pitching mechanism is a crucial component of port equipment. Its primary function is to enable the rotation of the front girder around its hinge point, thus switching the front girder between pitching and leveling modes. The pitching mechanism mainly consists of a motor, coupling, brake, gearbox, and drum. The motor is connected to the gearbox via a coupling, which converts the motor's high-speed rotation into a low-speed, high-torque output. This power is then transmitted to the drum via a transmission device (such as sprockets, chains, or gears). A steel wire rope is wound around the drum, and after exiting the drum, it winds back and forth between the pulley block at the top of the trapezoidal frame and the pulley block of the front girder, finally securing itself to the trapezoidal frame or the front girder. When the motor drives the drum to rotate, the steel wire rope is wound and unwound accordingly, thus achieving the pitching motion of the front girder.
[0004] However, the existing pitching mechanism only has mechanical limiters as its safety protection device. After long-term use, these limiters become insensitive and may cause the wire rope to become tangled, posing a great safety hazard. Therefore, there is an urgent need for a safety protection device for the pitching mechanism of the quay crane. Summary of the Invention
[0005] This invention addresses the problem that mechanical limiters in current pitching mechanisms become insensitive after prolonged use, potentially leading to wire rope tangling and posing a significant safety hazard. It proposes a safety protection device for the pitching mechanism of a quay crane that continues to provide safety protection for the pitching mechanism even after the mechanical limiter fails, preventing accidents caused by the mechanical limiter's malfunction.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is a safety protection device for the pitching mechanism of a quay crane, including a base, a limit bracket rotatably connected to the top of the base, a contact rod fixed to one end of the limit bracket, a mechanical limiter installed on the base, the mechanical limiter contacting the limit bracket, an auxiliary frame connected to the side of the base, and an inductive limiter installed on the auxiliary frame, the inductive limiter located at one end of the limit bracket and capable of sensing the movement of the limit bracket. This device, by setting the mechanical limiter and the inductive limiter, can improve the sensitivity of the pitching mechanism detection, further improve the monitoring of the pitching mechanism wire rope, and avoid the phenomenon of wire rope tangling due to inadequate monitoring. The overall effect is good and the practicality is strong.
[0007] Furthermore, a rotating seat is installed on the top of the base, and a connecting plate is fixed to the rotating part of the rotating seat. The connecting plate is fixed to the limiting bracket by bolts.
[0008] Furthermore, the connecting plate has an elongated, waist-shaped hole for the bolts to pass through, which allows for adjustment of the position of the limit bracket and monitoring of the wire rope at various positions, thus broadening its applicability.
[0009] Furthermore, the rotating seat is equipped with an oil nozzle, through which lubricating oil can be added to the rotating seat, extending its service life.
[0010] Furthermore, the contact rod is U-shaped, which can restrict the wire rope and prevent it from detaching, thus avoiding situations where it cannot be detected.
[0011] Furthermore, the inductive limit switch and the mechanical limit switch are connected in series. Through the interconnected inductive limit switch and the mechanical limit switch, an alarm can be triggered when any limit switch is triggered, ensuring the safe operation of the pitch mechanism.
[0012] The beneficial effects of this utility model are:
[0013] This invention, by adding a sensor-operated limit switch in series with the original mechanical limit switch, ensures that the mechanical limit switch continues to provide protection even if it fails due to prolonged impact. This significantly improves the safety performance of the quay crane's pitching mechanism and effectively prevents safety accidents caused by mechanical limit switch failure. This invention has a simple structure, is easy to implement, does not affect the normal operation of existing equipment, and is highly practical. 3. Through dual limit protection, the safety and reliability of the equipment are ensured under extreme conditions, improving the safety and reliability of port operations. Attached Figure Description
[0014] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only 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.
[0015] Figure 1 This is a schematic diagram of the main structure of this utility model.
[0016] Figure 2 This is a top view of the limiting bracket of this utility model.
[0017] In the diagram: 1. Base; 2. Rotating seat; 3. Connecting plate; 4. Limiting bracket; 5. Contact rod; 6. Steel wire rope; 7. Mechanical limiter; 8. Auxiliary frame; 9. Inductive limiter; 10. Waist-shaped elongated hole; 11. Oil nozzle. Detailed Implementation
[0018] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.
[0019] like Figure 1-2As shown in this embodiment, the safety protection device for the tilting mechanism of a quay crane proposed by this utility model includes a base 1, a rotating seat 2 installed on the top of the base 1, a connecting plate 3 fixed to the rotating part of the rotating seat 2, and a limiting bracket 4 fixed to the connecting plate 3 by bolts. The hole for the bolts in the connecting plate 3 is an oblong hole 10, through which the position of the limiting bracket 4 can be adjusted, enabling monitoring of the wire rope at various positions, thus broadening its applicability. An oil nozzle 11 is installed on the rotating seat 2, through which lubricating oil can be added to the rotating seat 2, extending its service life. The contact rod 5 is U-shaped, which can restrict the wire rope to prevent it from detaching and thus preventing the failure to monitor it. The limiting bracket... One end of the bracket 4 is fixed with a contact rod 5, and a mechanical limiter 7 is installed on the base 1. The mechanical limiter 7 contacts the limit bracket 4. An auxiliary frame 8 is connected to the side of the base 1, and an inductive limiter 9 is installed on the auxiliary frame 8. The inductive limiter 9 is located at one end of the limit bracket 4 and can sense the movement of the limit bracket 4. The inductive limiter 9 and the mechanical limiter 7 are connected in series. Through the interconnected inductive limiter 9 and mechanical limiter 7, an alarm can be triggered when any limiter is triggered, ensuring the safe operation of the pitch mechanism. By setting the mechanical limiter 7 and the inductive limiter 9, this device can improve the sensitivity of the pitch mechanism detection, further improve the monitoring of the pitch mechanism wire rope, and avoid the phenomenon of wire rope tangling due to inadequate monitoring. The overall effect is good and the practicality is strong.
[0020] like Figure 1 As shown, the limiting bracket 4 of this utility model can rotate on the base 1 and abut against the steel wire rope of the pitching mechanism through the contact rod 5 to realize the monitoring of the steel wire rope. When the steel wire rope is running normally, there are no problems. When the steel wire rope changes, it can drive the limiting bracket 4 to rotate to the left or right. At this time, one of the inductive limiter 9 and the mechanical limiter 7 can receive the signal and send information in time so that the staff can repair the steel wire rope.
[0021] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A safety protection device for a quay crane pitching mechanism, comprising a base (1), characterized in that, The top of the base (1) is rotatably connected to a limit bracket (4). One end of the limit bracket (4) is fixed with a contact rod (5). A mechanical limiter (7) is installed on the base (1). The mechanical limiter (7) contacts the limit bracket (4). An auxiliary frame (8) is connected to the side of the base (1). A sensor limiter (9) is installed on the auxiliary frame (8). The sensor limiter (9) is located at one end of the limit bracket (4) and can sense the movement of the limit bracket (4).
2. The safety protection device for the quay crane pitching mechanism according to claim 1, characterized in that, A rotating seat (2) is installed on the top of the base (1). A connecting plate (3) is fixed on the rotating part of the rotating seat (2). The connecting plate (3) is fixed to the limiting bracket (4) by bolts.
3. The safety protection device for the quay crane pitching mechanism according to claim 2, characterized in that, The hole in the connecting plate (3) for passing through the bolt is an oblong hole (10).
4. The safety protection device for the quay crane pitching mechanism according to claim 2, characterized in that, An oil nozzle (11) is installed on the rotating seat (2).
5. The safety protection device for the quay crane pitching mechanism according to claim 1, characterized in that, The contact rod (5) is U-shaped.
6. The safety protection device for the quay crane pitching mechanism according to claim 1, characterized in that, The inductive limiter (9) and the mechanical limiter (7) are connected in series.