Double-brake luffing device of port crane

Abstract

The utility model discloses a port crane double -brake amplitude variation device relates to crane technical field. The utility model discloses a winch one side fixedly connected with the speed reducer motor, the winch one side is provided with the wire arranging wheel, the winch one side is provided with detection component, and the detection component includes the fixed plate of setting at the wire arranging wheel one side. The utility model discloses through the three pulley tension sensor of detection component and photoelectric sensor cooperation, real -time monitoring the steel cable tension change and whether appearing the fracture phenomenon, three pulley design accurate capture overload, slack or abnormal stress, and photoelectric sensor identifies the steel cable fracture sign through the light signal, realizes early warning, and combines external data feedback system, can timely trigger locking component action, avoids the sudden fracture of recessive injury accumulation, effectively promotes the steel cable security and equipment reliability, reduces maintenance cost and operation risk.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, and in particular relates to a dual-brake luffing device for a port crane. Background Technology

[0002] The luffing device of a port crane is the core mechanism for controlling the change of the boom angle. Its safety and reliability are directly related to the efficiency of port operations and the safety of personnel and equipment. At present, the industry generally adopts a dual-braking luffing device, which works in conjunction with the winch cable drive and the rigid transmission of gears and racks to achieve the luffing adjustment and redundant braking of the boom.

[0003] As a flexible transmission component, steel cable is subjected to alternating loads, bending fatigue, and environmental corrosion over long periods, making it prone to internal wire breakage, wear, or localized stress concentration. However, traditional inspection methods struggle to detect hidden damage within the steel cable, resulting in delayed warnings of breakage risks. In contrast, as a rigid transmission component, the wear and tooth breakage of gears and racks can be quickly identified through routine maintenance, leading to significantly higher maintenance efficiency compared to steel cables. When a steel cable suddenly breaks due to fatigue or overload, traditional dual-braking devices rely solely on the gears and racks to withstand the impact load. Because the enormous kinetic energy released instantly upon cable breakage cannot be effectively contained, the following consequences may occur: the impact force far exceeds the design strength of the gear rack, causing tooth surface cracking or transmission failure; the crane boom and suspended cargo will plummet rapidly due to loss of cable traction, threatening port operation safety; the broken cable will swing under inertia, potentially damaging surrounding equipment or endangering personnel. Some cranes use mechanical clamps or hydraulic brakes for emergency braking, but their response speed is slow (relying on manual triggering), clamping force is insufficient, and they cannot be linked to the cable's status in real time, making it difficult to achieve rapid locking after breakage within milliseconds. While electromagnetic braking technology has a fast response, it is mostly used for main winch braking and lacks a directional locking design for luffing cable breakage. Therefore, we provide a dual-braking luffing device for port cranes to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a dual-brake luffing device for port cranes, which solves the problem that the huge kinetic energy released at the moment of steel cable breakage cannot be effectively locked in the prior art by the coordinated setting of detection components and locking components.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a dual-brake luffing device for a port crane, comprising a winch, a geared motor fixedly connected to one side of the winch, a cable guide wheel on one side of the winch, and a detection assembly on one side of the winch. The detection assembly includes a fixed plate on one side of the cable guide wheel, a three-pulley tension sensor fixedly connected to one side of the fixed plate, an extension rod fixedly connected to one side of the fixed plate, a detection block fixedly connected to one end of the extension rod, and a photoelectric sensor disposed inside the detection block. A locking assembly is disposed on one side of the detection assembly, comprising a locking box on one side of the detection assembly, a locking rod fixedly connected inside the locking box, a locking wheel movably connected to the surface of the locking rod via a bearing, a first electromagnet fixedly connected inside the locking wheel, a second electromagnet fixedly connected to the surface of the locking rod, and a locking plate disposed inside the locking box.

[0007] The present invention is further configured such that a mounting plate is fixedly connected to the top of the detection block by bolts, a mounting block is fixedly connected to the bottom of the mounting plate, a mounting through hole is opened inside the mounting block, the photoelectric sensor is fixedly connected to the mounting through hole by bolts, and an inlet / outlet through groove is opened inside the detection block.

[0008] The present invention is further configured such that hydraulic cylinders are fixedly connected to the top and bottom of the locking box, the output end of the hydraulic cylinder is fixedly connected to the locking plate, and the number of hydraulic cylinders, locking wheels and locking plates are three.

[0009] The present invention is further configured such that both sides of the locking box are open, the locking plate is A-shaped, and the locking wheels are staggered.

[0010] The present invention is further configured such that a locking groove is provided inside the locking wheel, the first electromagnet is fixedly connected inside the locking groove, and the second electromagnet is located inside the first electromagnet.

[0011] The present invention is further configured such that a limiting post is fixedly connected inside the locking box, a limiting through hole is opened inside the locking plate, and the limiting post is located inside the limiting through hole.

[0012] The present invention has the following beneficial effects.

[0013] 1. This utility model uses a three-pulley tension sensor and a photoelectric sensor in the detection component to work together to monitor changes in cable tension and whether a breakage occurs in real time. The three-pulley design accurately captures overload, slack, or abnormal force, while the photoelectric sensor identifies signs of cable breakage through light signals, enabling early warning. Combined with an external data feedback system, it can promptly trigger the locking component to avoid sudden breakage caused by the accumulation of hidden damage, effectively improving cable safety and equipment reliability, and reducing maintenance costs and operational risks.

[0014] 2. This utility model employs an electromagnetic-hydraulic composite braking mechanism. The electromagnet instantly locks the locking wheel upon energization, while the hydraulic cylinder drives the A-shaped locking plate to clamp the steel cable, creating multi-stage braking. The staggered locking wheel design increases the friction area, and combined with the limiting post, enhances structural stability and rapidly dissipates the kinetic energy of the fracture impact. This design can complete locking within milliseconds, preventing steel cable slippage, ensuring the stability of the crane boom and load, and significantly improving the safety of port operations and equipment lifespan.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of a dual-brake luffing device for a port crane.

[0018] Figure 2 This is an exploded schematic diagram of the first and second electromagnets in a dual-braking luffing device for a port crane.

[0019] Figure 3 This is an exploded schematic diagram of the detection block and photoelectric sensor in a dual-brake luffing device for a port crane.

[0020] Figure 4 This is a cross-sectional view of the locking box in a dual-brake luffing device of a port crane.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] In the attached diagram: 1. Winch; 2. Gear motor; 3. Cable reel; 4. Detection assembly; 401. Fixing plate; 402. Three-pulley tension sensor; 403. Extension rod; 404. Detection block; 405. Photoelectric sensor; 5. Locking assembly; 501. Locking box; 502. Locking rod; 503. Locking wheel; 504. First electromagnet; 505. Second electromagnet; 506. Locking plate; 6. Mounting plate; 7. Hydraulic cylinder; 8. Limit post. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0025] Please see Figure 1-4 This utility model relates to a dual-brake luffing device for a port crane, comprising a winch 1, a geared motor 2 fixedly connected to one side of the winch 1, and a cable guide wheel 3 disposed on one side of the winch 1. The geared motor 2 is existing technology and will not be described in detail here, and those skilled in the art can clearly understand its working principle. A detection component 4 is disposed on one side of the winch 1, the detection component 4 including a fixed plate 401 disposed on one side of the cable guide wheel 3, a three-pulley tension sensor 402 fixedly connected to one side of the fixed plate 401, and an extension rod 4 fixedly connected to one side of the fixed plate 401. 03. A detection block 404 is fixedly connected to one end of the extension rod 403, and a photoelectric sensor 405 is disposed inside the detection block 404. The three-pulley tension sensor 402 and the photoelectric sensor 405 are both existing technologies, and will not be described in detail in this solution. Moreover, those skilled in the art can clearly understand the working principle. Through the setting of the detection component 4, the three-pulley tension sensor 402 contacts the steel cable through three pulleys, dynamically measuring the tension change of the steel cable and identifying overload, slack or abnormal stress conditions. The photoelectric sensor 405 is integrated inside the detection block 404. The system detects whether the steel cable is broken by using optical signals. Combined with data detected by the three-pulley tension sensor 402 and the photoelectric sensor 405, the system judges the cable's health status in real time and provides a trigger signal to the locking assembly 5. A locking assembly 5 is located on one side of the detection assembly 4. The locking assembly 5 includes a locking box 501 located on one side of the detection assembly 4, a locking rod 502 fixedly connected inside the locking box 501, a locking wheel 503 movably connected to the surface of the locking rod 502 via bearings, and a first electromagnet 504 fixedly connected inside the locking wheel 503. The second electromagnet 505, which is fixedly connected to the surface of the locking rod 502, and the locking plate 506, which is set inside the locking box 501, generate a strong attraction force when the first electromagnet 504 and the second electromagnet 505 are energized through the locking assembly 5. This instantly locks the locking wheel 503, preventing the steel cable from sliding and increasing the friction with the steel cable. The staggered locking wheel 503 design increases the contact area of ​​the steel cable. The impact kinetic energy at the moment of breakage is dissipated through friction. The three sets of locking wheels 503 and the locking plate 506 form a multi-stage braking system to avoid single-point failure and ensure locking reliability. Specific Implementation

[0027] Please see Figure 1-4Based on the specific embodiment, the top of the detection block 404 is fixedly connected to the mounting plate 6 by bolts, and the bottom of the mounting plate 6 is fixedly connected to the mounting block. The mounting block has an internal mounting through hole, and the photoelectric sensor 405 is fixedly connected to the inside of the mounting through hole by bolts. The detection block 404 has an inlet / outlet through groove. The mounting plate 6 and the mounting block are used to fix the photoelectric sensor 405. The top and bottom of the locking box 501 are both fixedly connected to hydraulic cylinders 7. The output end of the hydraulic cylinder 7 is fixedly connected to the locking plate 506. There are three hydraulic cylinders 7, three locking wheels 503, and three locking plates 506. The hydraulic cylinder 7 is existing technology and will not be described in detail here. Those skilled in the art can clearly understand its working principle. The hydraulic cylinders 7 are used to drive the locking plate 506 to move quickly towards the locking wheel 503. The locking box 501 has open designs on both sides. The locking plate 506 is A-shaped, and the locking wheel... 503 features an alternating upper and lower design. The locking plate 506, in conjunction with the locking wheel 503, locks the steel cable on its surface. The locking wheel 503 has a locking groove inside. A first electromagnet 504 is fixedly connected inside the locking groove, and a second electromagnet 505 is located inside the first electromagnet 504. Electromagnets are existing technology, and this solution will not elaborate further; those skilled in the art will clearly understand the working principle. Through the arrangement of the first and second electromagnets 504 and 505, when energized, the strong attraction between them quickly locks the locking wheel 503. A limiting post 8 is fixedly connected inside the locking box 501. A limiting hole is formed inside the locking plate 506, and the limiting post 8 is located inside the limiting hole. The limiting post 8 is used to limit the movement of the locking plate 506, enhancing its stability when locking the steel cable.

[0028] The working principle of this utility model is as follows: the steel cable passes through the inlet and outlet slots inside the three pulley tension sensor 402 and the detection block 404, and then passes through the locking wheel 503 in sequence. During the process of the winch 1 winding and unwinding the steel cable, the three pulley tension sensor 402 detects the tightness of the steel cable. If the tightness is different from the safety value set in the external control system, or if the photoelectric sensor 405 detects that the detection block 404 has lost the information of the steel cable passing through, it means that the steel cable needs to be locked.

[0029] At this time, the external control system sends an energizing command to the first electromagnet 504 and the second electromagnet 505. The first electromagnet 504 and the second electromagnet 505 are magnetically attracted and fixed, and the locking wheel 503 stops rotating. The impact is reduced by the friction with the steel cable. At the same time, the hydraulic cylinder 7 drives the locking plate 506 to move towards the locking wheel 503. The A-shaped tip of the locking plate 506 is inserted into the gap of the locking wheel 503 to form a multi-point clamping area, increasing the contact area of ​​the steel cable. The hydraulic cylinder 7 continues to pressurize, and the locking plate 506 and the locking wheel 503 form a rigid clamp, completely preventing the steel cable from slipping. The steel cable on the locking wheel 503 is quickly locked to prevent the steel cable from slipping out completely after it breaks, and to reduce the impact load of the external gear rack.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A dual-brake luffing device for a port crane, comprising a winch (1), characterized in that; A geared motor (2) is fixedly connected to one side of the winch (1), and a wire guide wheel (3) is provided on one side of the winch (1); A detection assembly (4) is provided on one side of the winch (1). The detection assembly (4) includes a fixed plate (401) on one side of the cable tray (3), a three-pulley tension sensor (402) fixedly connected to one side of the fixed plate (401), an extension rod (403) fixedly connected to one side of the fixed plate (401), a detection block (404) fixedly connected to one end of the extension rod (403), and a photoelectric sensor (405) provided inside the detection block (404). A locking assembly (5) is provided on one side of the detection assembly (4). The locking assembly (5) includes a locking box (501) provided on one side of the detection assembly (4), a locking rod (502) fixedly connected inside the locking box (501), a locking wheel (503) movably connected to the surface of the locking rod (502) via a bearing, a first electromagnet (504) fixedly connected inside the locking wheel (503), a second electromagnet (505) fixedly connected to the surface of the locking rod (502), and a locking plate (506) provided inside the locking box (501).

2. The dual-brake luffing device for a port crane according to claim 1, characterized in that, The top of the detection block (404) is fixedly connected to the mounting plate (6) by bolts, and the bottom of the mounting plate (6) is fixedly connected to the mounting block. The mounting block has an installation through hole inside, and the photoelectric sensor (405) is fixedly connected to the installation through hole by bolts. The detection block (404) has an inlet and outlet through groove inside.

3. The dual-brake luffing device for a port crane according to claim 1, characterized in that, The top and bottom of the locking box (501) are fixedly connected to hydraulic cylinders (7), and the output end of the hydraulic cylinder (7) is fixedly connected to the locking plate (506). There are three hydraulic cylinders (7), three locking wheels (503), and three locking plates (506).

4. A dual-brake luffing device for a port crane according to claim 1, characterized in that, The locking box (501) has an open design on both sides, the locking plate (506) is A-shaped, and the locking wheel (503) has an alternating design.

5. A dual-brake luffing device for a port crane according to claim 1, characterized in that, The locking wheel (503) has a locking groove inside, the first electromagnet (504) is fixedly connected inside the locking groove, and the second electromagnet (505) is located inside the first electromagnet (504).

6. A dual-brake luffing device for a port crane according to claim 1, characterized in that, The locking box (501) is fixedly connected to a limiting post (8), and the locking plate (506) has a limiting through hole inside, with the limiting post (8) located inside the limiting through hole.

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