A quick connecting device for a boat bridge

Abstract

The application discloses a kind of pontoon bridge quick connecting device, it is related to pontoon bridge connection technical field, although existing equipment can satisfy basic connection demand, but there is still room for improvement in complex water surface environment adaptability, intelligent control integration degree and the like.The application provides a kind of pontoon bridge quick connecting device, is set on gate bridge unit, including pulling assembly, is set on the both sides of gate bridge unit, for driving adjacent gate bridge unit mutually close or away;Telescopic electromagnet assembly is set to the front end and rear end of gate bridge unit, for automatically extending after entering water, auxiliary suction when butt joint, auxiliary separation when disassembling;Infrared alignment component is set on gate bridge unit, for detecting the alignment state of adjacent gate bridge unit;Alignment component is set to the front end and rear end of gate bridge unit, for realizing the accurate alignment and locking of gate bridge unit.

Description

Technical Field

[0001] This invention relates to the field of pontoon bridge connection technology, and more specifically to a quick pontoon bridge connection device. Background Technology

[0002] As the core emergency ferry carrier of pontoon bridge equipment, the efficiency and reliability of the connections between its units directly determine the success or failure of river crossing operations. Currently, domestic and international pontoon bridge connection equipment is mainly developing towards intelligence, speed, and lightweight design, with mainstream technologies primarily based on mechanical manual connections and hydraulic drive connections. The core requirements for pontoon bridge connections in scenarios such as military emergency river crossings and flood relief are: rapid alignment (adapting to water surface fluctuations), stable locking (supporting heavy equipment), convenient disassembly (improving retrieval efficiency), and single-person operation (reducing operational risks). While existing equipment can meet basic connection requirements, there is still room for improvement in adaptability to complex water environments and the integration of intelligent control.

[0003] Most domestic gantry bridge connection devices rely on manual calibration, which takes a long time to connect. Although advanced foreign equipment (such as the German MFN modular gantry bridge connection system) has achieved semi-automatic connection, the core technology barrier is high, and the disassembly efficiency and connection stability in complex environments such as rapid currents and waves still need to be optimized.

[0004] Based on the technical research and performance testing of existing portal bridge connection devices both domestically and internationally, the following core defects in existing technologies have been identified and analyzed in detail below: (1) The alignment guidance mechanism is imperfect and has poor environmental adaptability. In scenarios involving fluctuating water flow and turbulent waves, alignment misalignment and jamming are prone to occur, requiring repeated manual calibration. A single alignment can take 3-5 minutes, which cannot meet the timeliness requirements of emergency operations. Although some equipment integrates magnetic guidance, it lacks a buffer structure, resulting in high impact forces during docking and easily damaging interface components.

[0005] (2) Insufficient reliability in judging the traction closure and positioning. Existing traction mechanisms mostly employ hydraulic or manual traction. Hydraulic traction is prone to pressure fluctuations, leading to uneven traction force, while manual traction is inefficient and labor-intensive. Both can easily cause tilting or loose fitting of the portal bridge unit during closure. Furthermore, positioning accuracy often relies on mechanical limit switches, which have low sensitivity and are susceptible to misjudgments due to vibration and water flow, resulting in incomplete locking or excessive compression, affecting connection stability and component lifespan.

[0006] (3) The contradiction between connection stability and ease of disassembly is prominent. To ensure connection stability, existing devices mostly employ rigid locking structures, which offer strong sealing and good impact resistance after locking. However, disassembly requires step-by-step unlocking and lacks auxiliary separation mechanisms. Due to water flow adsorption and component interlocking, disassembly is time-consuming and difficult, sometimes requiring external tools to pry, which can easily damage the locking components and the gate bridge interface. Furthermore, magnetic auxiliary connection devices only provide suction-assisted docking and cannot achieve repulsive-assisted disassembly, further exacerbating the disassembly difficulty.

[0007] (4) The electromagnet components have limited functionality and insufficient adaptability. Existing integrated electromagnet connection devices mostly use fixed electromagnet structures, which cannot achieve form switching between transportation and operation. They occupy a lot of space during transportation and are easily damaged by collisions. After being immersed in water, they cannot automatically extend to adapt to the docking requirements and require manual adjustment. At the same time, electromagnets only have a single attraction function and cannot achieve repulsion to assist disassembly through electrode conversion. Their function is limited and cannot meet the dual needs of docking and disassembly.

[0008] (5) The integration of intelligent control is low and the operation is complex. The existing devices' alignment judgment, pulling and closing, and locking functions are mostly controlled independently, requiring operators to manually trigger them step by step. There is no intelligent linkage mechanism, making the operation process cumbersome and demanding high levels of professional skill from operators. Some semi-automated devices lack comprehensive status feedback and fault alarm functions, making it impossible to detect and handle abnormalities in a timely manner during operation, which can easily lead to docking failures or safety hazards. Summary of the Invention

[0009] To address the aforementioned problems, this invention aims to provide a quick-connect device for pontoon bridges, which enables rapid and precise alignment of pontoon bridge units, improves the reliability of connection and locking, facilitates convenient and efficient disassembly, and enhances operational efficiency and safety.

[0010] The main idea of ​​the technical solution adopted in this invention is as follows: An infrared-magnetic composite alignment design is used. Initially, infrared-assisted alignment judgment ensures accuracy, followed by electromagnet adsorption providing auxiliary pulling, thus doubly guaranteeing alignment efficiency and success rate in complex water environments. A retractable electromagnet assembly is designed, which, through the synergistic action of mechanical limiting, water buoyancy, pressure in the storage chamber, and high-pressure hydraulics, achieves adaptive switching between transport contraction, water entry extension, and docking compression, balancing transport safety and operational adaptability. Furthermore, the combination of high-pressure hydraulic propulsion in the storage chamber and electromagnet repulsion provides dual assistance for the separation of the gantry unit, solving the problems of difficult and time-consuming disassembly in traditional devices. The central control module integrates all functional modules, achieving full-process linkage of alignment, pulling, locking, and disassembly, simplifying the operation process.

[0011] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A quick-connection device for pontoon bridges, mounted on a pontoon bridge unit, includes: The traction assembly, located on both sides of the portal bridge unit, is used to drive adjacent portal bridge units closer to or further apart from each other; The retractable electromagnet assembly is located at the front and rear ends of the gantry unit and is used to automatically extend after entering the water, assist in attraction during docking, and assist in separation during disassembly. An infrared alignment component is installed on the portal bridge unit to detect the alignment status of adjacent portal bridge units; Alignment components, located at the front and rear ends of the gantry bridge unit, are used to achieve precise alignment and locking of the gantry bridge unit.

[0012] Based on the above technical solutions, the tensioning component further includes: The motor is housed in receiving slots on both sides of the portal bridge unit; A lead screw is connected to the output shaft of the motor, and a slider is installed on the lead screw; The pull rope has one end set on the slider and the other end connected to a buckle, which is used to connect adjacent portal bridge units.

[0013] Furthermore, based on the above technical solutions, the retractable electromagnet assembly includes: A longitudinal groove is located at the bottom of the portal bridge unit, and a floating plate and a spring are arranged from bottom to top in the longitudinal groove. Guide groove 1 is connected to longitudinal groove and has a movable rod inside it. An electromagnet is installed at the free end of the movable rod. The sliding groove is located at the rear end of the gantry bridge unit and is corresponding to the guide groove. The sliding groove is equipped with a movable seat and an electromagnet.

[0014] Furthermore, the above technical solution also includes a guide groove 2 connected to the longitudinal groove. The guide groove 2 is provided with a fixed plate, a spring 2 and a movable plate connected in sequence. The movable plate slides in the guide groove 2, and the fixed plate is connected to the side wall of the guide groove 2.

[0015] Furthermore, the above technical solutions include: high-pressure fluid installed in guide groove 1, guide groove 2, and the longitudinal groove.

[0016] Furthermore, based on the above technical solutions, the infrared alignment component includes an infrared transmitter located at the front end of the gantry unit and an infrared reflector located at the rear end.

[0017] Furthermore, based on the above technical solutions, the alignment component includes: The mounting slot is located at the front end of the gantry unit, and a pressure sensor is installed inside the mounting slot. The mounting block is located at the rear end of the gantry unit. The mounting block is provided with a slot and a drainage hole. The slot is set along the width direction of the gantry unit. The electric telescopic rod is installed on both sides of the mounting slot and is compatible with the slot.

[0018] Furthermore, the installation groove and the pressure storage chamber are connected by a guide groove three, and a limiting plate, a spring four and a pressure plate are connected in sequence in the guide groove three.

[0019] A method for rapid connection of pontoon bridges, implemented based on any one of the aforementioned devices, is characterized by comprising the following steps: Preparation phase: After the gantry crane unit enters the water, the float rises, compresses the pressure storage chamber, and pushes the electromagnet to extend automatically; Alignment phase: The infrared emitter and infrared reflector work together to determine the alignment status; Pulling and closing stage: Manually connect the buckles to the adjacent portal bridge units, start the motor to drive the lead screw, and bring the adjacent portal bridge units closer to each other; Locking stage: The mounting block is pressed into the mounting slot, triggering the pressure sensor, and the electric telescopic rod is inserted into the slot to complete the locking; Disassembly phase: The electric telescopic rod retracts, electromagnet one or electromagnet two switches polarity to generate repulsive force, and high-pressure hydraulics pushes the pressure plate to assist in separating the gate bridge unit.

[0020] Furthermore, through the above technical solution, during the locking stage, the mounting block squeezes the pressure plate to compress the spring, and after the pressure sensor detects the position signal, it starts the electric telescopic rod, while the drain hole discharges the water accumulated in the slot.

[0021] The beneficial effects of this invention are: (1) Alignment efficiency is greatly improved This device employs an infrared-magnetic composite alignment mechanism. Infrared-assisted alignment judgment ensures accuracy, while electromagnet adsorption provides auxiliary traction, shortening alignment time and improving the alignment success rate in complex water environments. This solves the problems of long alignment time and low deviation tolerance of traditional devices.

[0022] (2) Connection stability is significantly enhanced Existing devices have a high loosening rate under dynamic loads after locking, and some equipment is prone to interface deformation when bearing heavy equipment due to uneven pulling and incomplete locking. This device uses lead screw pulling and pressure sensing for precise locking, combined with electromagnet adsorption reinforcement, which improves the impact load resistance after locking and enhances the reliability and connection stability under dynamic loads.

[0023] (3) The ease of disassembly has been greatly improved. Existing devices require 3-4 minutes to disassemble a single gantry bridge, and in some scenarios, external tools are needed, which can easily damage components. This device uses a combination of electromagnet repulsion and pressure in the storage chamber to assist in separation, greatly reducing disassembly time. No external tools are required, and a single person can complete the disassembly operation, improving disassembly efficiency and reducing component damage.

[0024] (4) Operational complexity is significantly reduced This device enables intelligent linkage, supports automatic / manual operation, simplifies the operation process, and allows operators to start working without professional skills training. It also avoids the safety risks of close-range operations and is suitable for rapid operation needs in emergency scenarios.

[0025] (5) Extended service life of components Existing devices suffer from reduced component lifespan due to rigid impact during docking and forced prying during disassembly. This device reduces docking impact by using buffer springs and pressure storage chambers to buffer and depressurize, while eliminating forced force during disassembly, thus extending the average lifespan of components and reducing total lifespan costs.

[0026] (6) Multi-state adaptive adaptation innovation Each core component of the device can automatically switch its working state according to different scenarios such as transportation, water entry, docking, and disassembly, without the need for manual adjustment. It adapts to the rapid response requirements of emergency operations and has a flexibility far exceeding that of existing fixed structure equipment. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the gantry bridge unit connection state of the present invention; Figure 2 This is a schematic diagram of the front-end three-dimensional structure of the portal bridge unit of the present invention; Figure 3 for Figure 2 Enlarged schematic diagram of part A; Figure 4 This is a three-dimensional structural diagram of the rear end of the portal bridge unit of the present invention; Figure 5 This is a three-dimensional structural diagram of the movable rod and electromagnet of the present invention; Figure 6 This is a three-dimensional structural diagram showing the connection relationship between the fixed disk, the second spring, and the movable disk of the present invention; Figure 7 This is a three-dimensional structural diagram of the limiting ring, floating plate, and spring of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the spring (three), movable seat, and electromagnet (two) of the present invention; Figure 9 This is a three-dimensional structural diagram of the limiting disc, spring four, and pressing disc of the present invention; Figure 10 This is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 11 This is a top-view three-dimensional structural diagram of the present invention; Figure 12 for Figure 11 Schematic diagram along section AA; Figure 13 for Figure 11Schematic diagram along the BB section; Figure 14 for Figure 11 Schematic diagram along the CC section; Figure 15 This is a perspective view of the three-dimensional structure of the connection state of the present invention; Among them: 1. Portal bridge unit; 2. Pulling assembly; 201. Motor; 202. Lead screw; 203. Slider; 204. Pulling rope; 205. Guide block; 206. Fixing base; 207. Buckle; 3. Retractable electromagnet assembly; 301. Longitudinal groove; 302. Limiting ring; 303. Floating plate; 304. Spring 1; 305. Guide groove 1; 306. Guide groove 2; 307. Electromagnet 1; 308. Fixed plate; 309. Spring 2; 310. Movable plate; 311. Sliding groove; 312. Spring 3; 313. Movable seat; 314. Electromagnet 2; 315. Movable rod; 4. Infrared alignment assembly; 401. Infrared emitter; 402. Infrared reflector; 5. Alignment component; 501. Mounting slot; 502. Pressure sensor; 503. Guide slot three; 504. Limiting plate; 505. Spring four; 506. Pressing plate; 507. Mounting block; 508. Drain hole; 509. Slot; 510. Electric telescopic rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] The inventors' research revealed that, through technical surveys and performance tests of existing gantry bridge connection devices both domestically and internationally, the following core defects have been identified in the existing technologies, which are analyzed in detail below: the alignment and guidance mechanism is imperfect and has poor environmental adaptability; the reliability of pulling and closing and positioning judgment is insufficient; the contradiction between connection stability and ease of disassembly is prominent; the electromagnet components have limited functionality and insufficient adaptability; and the integration of intelligent control is low and the operation is complex.

[0030] Based on the above findings, this application proposes a rapid pontoon bridge connection device. It features an infrared-magnetic composite alignment design, where initial infrared-assisted alignment judgment ensures accuracy, followed by electromagnet adsorption providing auxiliary pulling, thus doubly guaranteeing alignment efficiency and success rate in complex water environments. A retractable electromagnet component 3 is designed, which, through the synergistic action of mechanical limiting, water buoyancy, pressure in the storage chamber, and high-pressure hydraulics, achieves adaptive switching between transport contraction, water entry extension, and docking compression, balancing transport safety and operational adaptability. Furthermore, the combination of high-pressure hydraulic propulsion in the storage chamber and electromagnet repulsion provides dual assistance for the separation of the pontoon bridge unit 1, solving the problems of difficult and time-consuming disassembly in traditional devices. A central control module integrates all functional modules, achieving full-process linkage of alignment, pulling, locking, and disassembly, simplifying the operation process.

[0031] Example 1: See Figures 1-15 This application discloses a quick connection device for pontoon bridges, which is installed on a portal bridge unit 1, and multiple portal bridge units 1 are connected in sequence to form a pontoon bridge.

[0032] The gantry unit 1 is a long strip structure divided into front and rear ends. Near the front end of the gantry unit 1, symmetrical traction components 2 are arranged on both sides, including receiving slots on both sides of the gantry unit 1. A motor 201 is installed within each receiving slot, and the output end of the motor 201 is connected to a lead screw 202. When the motor 201 operates, it drives the lead screw 202 to rotate synchronously. The two ends of the lead screw 202 are limited by limiting plates, which are fixedly connected to the inner wall of the receiving slot. A slider 203 is also provided on the lead screw 202, and a traction rope 204 is threaded through the slider 203. One end of the traction rope 204 has a limiting piece for limiting movement, and the other end has a buckle 207 for connecting to the adjacent gantry unit 1.

[0033] To prevent the pull rope 204 from deviating, a guide block 205 is provided at the end of the gantry unit 1. The guide block 205 has a guide hole, through which the pull rope 204 passes.

[0034] The portal bridge unit 1 has symmetrically arranged fixed seats 206 on both sides near the rear end. The shape of the fixed seats 206 is adapted to the buckle 207. When connection is required, the operator manually connects the buckle 207 to the fixed seat 206 of the adjacent portal bridge unit 1 and starts the motor 201, so that the lead screw 202 rotates and drives the slider 203 to move away from the fixed seat 206, so that the two portal bridge units 1 move closer to each other. The pulling component 2 achieves smooth pulling and improves the operation efficiency.

[0035] The front end of the gantry unit 1 is equipped with a retractable electromagnet assembly 3. Through the coordinated action of mechanical limiting, water buoyancy, pressure in the storage chamber and high-pressure hydraulic force, it can achieve adaptive switching of transport contraction, water entry extension and docking compression, taking into account both transport safety and operational adaptability. On the other hand, the combination of high-pressure hydraulic propulsion in the storage chamber and electromagnet repulsion can provide dual assistance for the separation of the gantry unit 1, solving the problems of difficult and time-consuming disassembly of traditional devices.

[0036] Specifically, the retractable electromagnet assembly 3 includes a longitudinal groove 301 located at the bottom of the gantry unit 1. Two longitudinal grooves 301 are symmetrically arranged, each comprising three interconnected, gradient-arranged cylindrical grooves: longitudinal groove one, longitudinal groove two, and longitudinal groove three. A limit ring 302 is fixedly installed in the lower longitudinal groove three to prevent the upper floating plate 303 from falling. A spring one 304 and a floating plate 303 are arranged from top to bottom in longitudinal groove two. One end of the spring one 304 is connected to the top wall of longitudinal groove two, and the other end is connected to the upper surface of the floating plate 303. The diameter of the floating plate 303 is larger than the inner diameter of the limit ring 302, ensuring that the floating plate 303 always moves up and down within the limit groove two. In the initial state, the spring one 304 is compressed, and at this time, the floating plate 303 is at the bottom, in contact with the limit ring 302. When the gantry unit 1 is placed in the water, the buoyancy of the float 303 can overcome the spring force, further compressing the spring, causing the float 303 to rise in height and separate from the limiting ring 302.

[0037] The longitudinal slot 1 communicates with the pressure storage chamber, which includes a guide slot 305 in the length direction and a guide slot 306 in the width direction within the portal bridge unit 1. A movable rod 315 is slidably connected within the guide slot 305, and an electromagnet 307 is provided at the end of the movable rod 315, which can change the magnetic direction by changing the direction of the current. The electromagnet 307 is located outside the guide slot 305.

[0038] The pressure storage chamber is filled with high-pressure fluid. Both ends of the guide groove 306 are equipped with stabilizing components to balance the high-pressure fluid within the pressure storage chamber. Each stabilizing component includes a fixed disk 308 fixedly connected to the side wall of the guide groove 306. The fixed disk 308 is sequentially connected to a spring 309 and a movable disk 310. The movable disk 310 can slide within the guide groove 306 and can closely adhere to the inner wall of the guide groove 306. Initially, the spring 309 is in a compressed state.

[0039] When the gantry unit 1 is placed in the water, the buoyancy of the float 303 overcomes the spring force and the pressure of the high-pressure fluid, further compressing the spring. The float 303 rises in height and separates from the limiting ring 302. The high-pressure fluid in the guide groove is squeezed, and the pressure is transmitted to the second guide groove 306 and the first guide groove 305. The movable plate 310 squeezes the second spring 309, causing the second spring 309 to shorten further. The movable rod 315 moves outward, and the first electromagnet 307 extends.

[0040] A receiving component for connecting to the movable rod 315 is provided at the rear end of the portal bridge unit 1. The receiving component includes a sliding groove 311 along the length of the portal bridge unit 1. A spring 312 and a movable seat 313 are disposed within the sliding groove 311. An electromagnet 314 is disposed outside the movable seat 313, and its magnetic direction can be changed by changing the direction of the current. In the initial state, the electromagnet 314 is located outside the sliding groove 311. The sliding groove 311 and the guide groove 305 are on the same axis, and the outer diameters of the electromagnets 314 and 307 are adapted to the inner diameters of the sliding groove 311 and the guide groove 305.

[0041] When connection is required, the operator manually connects the buckle 207 to the fixed seat 206 of the adjacent portal bridge unit 1 and starts the motor 201, causing the lead screw 202 to rotate and drive the slider 203 to move away from the fixed seat 206, bringing the two portal bridge units 1 closer together. The pulling assembly 2 then achieves smooth pulling, improving operational efficiency. When the portal bridge unit 1 is placed in water, the buoyancy of the float 303 overcomes the spring force and the pressure of the high-pressure liquid, further compressing the spring and causing the float 303 to rise in height, separating from the limiting ring 302. The high-pressure liquid in the guide groove is compressed, and the pressure is transmitted to guide groove two 306 and guide groove one 305. The movable plate 310 compresses the spring two 309, causing it to shorten further. The movable rod 315 moves outward, and the electromagnet one 307 extends. During the pulling process, electromagnet one 307 and electromagnet two 314 have opposite magnetic properties, creating a magnetic attraction. The electromagnet attraction provides auxiliary pulling, improving the connection efficiency of the portal bridge unit 1. Furthermore, when the portal bridge unit 1 is connected, the end of the movable rod 315 enters the sliding groove 311, which can play a guiding and tight and stable connection role.

[0042] Example 2: Based on Example 1, an infrared alignment component 4 is provided to improve the initial alignment accuracy.

[0043] An infrared transmitter 401 is provided at the front end of the gantry unit 1, and an infrared reflector 402 is provided at the rear end of the gantry unit 1. When connection is required, the infrared transmitter 401 transmits a signal to the infrared reflector 402 of the adjacent gantry unit 1, and determines whether the alignment is correct based on the reflected signal.

[0044] Working together with the retractable electromagnet component 3 in Example 1, the infrared-magnetic composite alignment design ensures accuracy through initial infrared-assisted alignment judgment, followed by electromagnet adsorption to provide auxiliary pulling, thus providing dual protection for alignment efficiency and success rate in complex water environments.

[0045] The front and rear ends of the gantry bridge unit 1 are equipped with electrical control systems to control the electrical control components.

[0046] Example 3: In order to further improve the connection stability and facilitate disassembly, alignment components 5 are provided at both ends of the portal bridge unit 1.

[0047] The alignment component 5 includes a mounting groove 501 located at the front end of the portal bridge unit 1, and a pressure sensor 502 is installed on the inner wall of the mounting groove 501. The mounting groove 501 is connected to the second guide groove 306 via a third guide groove 503 along the length of the portal bridge unit 1. A limit plate 504 is slidably installed in the third guide groove 503, and the limit plate 504 is sequentially connected to a fourth spring 505 and a pressure plate 506.

[0048] The rear end of the gantry unit 1 is provided with an installation block 507, which corresponds to the shape of the installation groove 501. The installation block 507 is provided with a drainage hole 508 in the longitudinal direction, and the two sides of the installation block 507 are provided with slots 509, which are connected to the drainage hole 508.

[0049] Electric telescopic rods 510 are respectively installed on both sides of the mounting groove 501 at the front end of the gantry unit 1. In the initial state, the movable end of the electric telescopic rod 510 is located at the side wall of the mounting groove 501. When the gantry unit 1 is connected, the pressure sensor 502 detects the pressure from the mounting block 507 and reaches the threshold, activating the electric telescopic rod 510 to insert into the corresponding slot 509, thereby improving the stability of the connection. Water in the slot 509 is discharged through the drain hole 508.

[0050] When connection is required, the operator manually connects the buckle 207 to the fixed seat 206 of the adjacent gantry unit 1 and starts the motor 201, causing the lead screw 202 to rotate and drive the slider 203 to move away from the fixed seat 206, bringing the two gantry units 1 closer together. The pulling assembly 2 then provides smooth pulling, improving operational efficiency. When the gantry unit 1 is placed in water, the buoyancy of the float 303 overcomes the spring force and the pressure of the high-pressure liquid, further compressing the spring. The float 303 rises in height and separates from the limiting ring 302. The high-pressure liquid in the guide groove is compressed, and the pressure is transmitted to guide groove two 306, guide groove one 305, and guide groove three 503. The movable plate 310 compresses the spring two 309, causing it to shorten further. The movable rod 315 and the pressure plate 506 move outwards, and the electromagnet one 307 extends. During the pulling process, electromagnet 307 and electromagnet 314 have opposite magnetic properties, creating a magnetic attraction. The electromagnets attract each other, providing auxiliary pulling and improving the connection efficiency of the gantry unit 1. When the gantry unit 1 is connected, the end of the movable rod 315 enters the sliding groove 311, and the mounting block 507 presses against the pressure plate 506, causing the spring 505 to enter the guide groove 503, providing guidance and a tight, stable connection. When the pressure sensor 502 detects the pressure from the mounting block 507 and reaches a threshold, it activates the electric telescopic rod 510, inserting it into the corresponding slot 509. Water in the slot 509 is drained through the drain hole 508, further improving connection stability.

[0051] When it is necessary to separate the gantry unit 1, the buckle 207 is disconnected from the fixed seat 206, the electric telescopic rod 510 is disengaged from the slot 509, and the electromagnetic direction of one of the electromagnets 307 and 314 is changed so that they have the same magnetism and repel each other. The repulsive force causes the movable rod 315 to exit the sliding groove 311, the volume of the pressure storage chamber becomes smaller, and the high-pressure hydraulic extrusion causes the pressure plate 506 to overcome the extrusion force of the mounting block 507 and extend out of the guide groove 503, separating the mounting block 507 from the mounting groove 501, making disassembly quick.

[0052] The usage process of this invention is as follows: Preparation Phase: After the gantry unit 1 enters the water, the buoyancy of the float 303 overcomes the spring force and the pressure of the high-pressure fluid, further compressing the spring, causing the float 303 to rise in height and separate from the limiting ring 302. The high-pressure fluid in the guide groove is compressed, and the pressure is transmitted to guide groove 2 306, guide groove 1 305, and guide groove 3 503. The movable plate 310 compresses the spring 2 309, causing the spring 2 309 to shorten further. The movable rod 315 and the pressure plate 506 move outward, and the electromagnet 1 307 extends. The electrical control system initializes, and all sensors and actuators perform self-tests normally. Alignment Phase: Adjacent portal bridge units 1 are initially positioned. Infrared transmitter 401 sends signals to the infrared reflectors 402 of adjacent portal bridge units 1, and determines whether alignment is achieved based on the reflected signals. Feedback is sent to the electronic control system. Simultaneously, the electromagnet on the right is energized to generate a magnetic force, assisting in alignment and pulling. During the pulling and closing stage: Operators manually connect the buckle 207 to the fixed seat 206 of the adjacent portal bridge unit 1 and start the motor 201. This causes the lead screw 202 to rotate, moving the slider 203 away from the fixed seat 206, bringing the two portal bridge units 1 closer together. The pulling assembly 2 then achieves smooth pulling. Electromagnet 1 307 and electromagnet 2 314 have opposite magnetic properties, creating a magnetic attraction. The electromagnets provide auxiliary pulling, improving the connection efficiency of the portal bridge units 1. Furthermore, during the connection of the portal bridge units 1, the end of the movable rod 315 enters the sliding groove 311, and the mounting block 507 presses against the pressure plate 506, causing the spring 4 505 to enter the guide groove 3 503, providing guidance and a tight, stable connection.

[0053] Locking stage: When the gate bridge unit 1 is fully closed, the left pressure sensor 502 is triggered. The pressure sensor 502 detects the pressure from the mounting block 507 and reaches the threshold, and sends a position signal. The electronic control system starts the electric telescopic rod 510, inserts it into the corresponding slot 509, and completes the rigid locking. The water in the slot 509 is discharged through the drain hole 508.

[0054] Disassembly phase: The operator issues an unlocking command, the electronic control system controls the electric telescopic rod 510 to retract and unlock, the lead screws 202 on both sides reverse to release the pull rope 204, remove the buckle 207, and then switch one of the electrodes of electromagnet one 307 and electromagnet two 314 to generate a repulsive force. The repulsive force causes the movable rod 315 to exit the sliding groove 311, the volume of the pressure storage chamber becomes smaller, and the high-pressure hydraulic extrusion causes the pressure plate 506 to overcome the extrusion force of the mounting block 507 and extend out of the guide groove three 503, separating the mounting block 507 from the mounting groove 501, making disassembly quick and the auxiliary gantry unit 1 to separate.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A quick connection device for pontoon bridges, characterized in that, Installed on the portal bridge unit, including: The traction assembly, located on both sides of the portal bridge unit, is used to drive adjacent portal bridge units closer to or further apart from each other; The retractable electromagnet assembly is located at the front and rear ends of the gantry unit and is used to automatically extend after entering the water, assist in attraction during docking, and assist in separation during disassembly. An infrared alignment component is installed on the portal bridge unit to detect the alignment status of adjacent portal bridge units; Alignment components are located at the front and rear ends of the portal bridge unit to achieve alignment and locking of adjacent portal bridge units.

2. The quick connection device for pontoon bridges according to claim 1, characterized in that, The tensioning components include: The motor is housed in receiving slots on both sides of the portal bridge unit; A lead screw is connected to the output shaft of the motor, and a slider is installed on the lead screw; The pull rope has one end set on the slider and the other end connected to a buckle, which is used to connect adjacent portal bridge units.

3. The quick connection device for pontoon bridges according to claim 2, characterized in that, The retractable electromagnet assembly includes: A longitudinal groove is located at the bottom of the portal bridge unit, and a floating plate and a spring are arranged from bottom to top in the longitudinal groove. Guide groove 1 is connected to longitudinal groove and has a movable rod inside it. An electromagnet is installed at the free end of the movable rod. The sliding groove is located at the rear end of the gantry bridge unit and is corresponding to the guide groove. The sliding groove is equipped with a movable seat and an electromagnet.

4. The quick connection device for pontoon bridges according to claim 3, characterized in that: It also includes a second guide groove that is connected to the longitudinal groove. The second guide groove is provided with a fixed plate, a second spring and a movable plate connected in sequence. The movable plate slides in the second guide groove, and the fixed plate is connected to the side wall of the second guide groove.

5. A quick connection device for pontoon bridges according to claim 4, characterized in that: High-pressure fluid is installed in guide groove one, guide groove two and longitudinal groove.

6. The quick connection device for pontoon bridges according to claim 5, characterized in that: The infrared alignment assembly includes an infrared emitter located at the front end of the gantry unit and an infrared reflector located at the rear end.

7. A quick connection device for pontoon bridges according to claim 6, characterized in that: Alignment components include: The mounting slot is located at the front end of the gantry unit, and a pressure sensor is installed inside the mounting slot. The mounting block is located at the rear end of the gantry unit. The mounting block is provided with a slot and a drainage hole. The slot is set along the width direction of the gantry unit. The electric telescopic rod is installed on both sides of the mounting slot and is compatible with the slot.

8. A quick connection device for pontoon bridges according to claim 7, characterized in that: The mounting slot and the pressure storage chamber are connected by a guide slot three, which contains a limit plate, a spring four, and a pressure plate connected in sequence.

9. A method for rapid connection of pontoon bridges, implemented based on the apparatus according to any one of claims 1 to 8, characterized in that, Includes the following steps: Preparation phase: After the gantry crane unit enters the water, the float rises, compresses the pressure storage chamber, and pushes the electromagnet to extend automatically; Alignment phase: The infrared emitter and infrared reflector work together to determine the alignment status; Pulling and closing stage: Manually connect the buckles to the adjacent portal bridge units, start the motor to drive the lead screw, and bring the adjacent portal bridge units closer to each other; Locking stage: The mounting block is pressed into the mounting slot, triggering the pressure sensor, and the electric telescopic rod is inserted into the slot to complete the locking; Disassembly phase: The electric telescopic rod retracts, electromagnet one or electromagnet two switches polarity to generate repulsive force, and high-pressure hydraulics pushes the pressure plate to assist in separating the gate bridge unit.

10. A method for rapid connection of a pontoon bridge according to claim 9, characterized in that, During the locking phase, the mounting block presses against the pressure plate, causing the spring to compress. After the pressure sensor detects the position signal, it activates the electric telescopic rod, which drains the water accumulated in the slot through the drain hole.

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