Anti-falling protection mechanism of large shipbuilding portal crane

Abstract

The invention belongs to the field of cranes, and particularly relates to an anti-falling protection mechanism for a large shipbuilding portal crane, which comprises outer plates, a lifting hook fixedly connected between the bottoms of the two outer plates, a pulley rotationally connected between the two outer plates and above the lifting hook, a steel wire rope wound on the outer side of the pulley, and the two outer plates are fixedly connected through a bracket. Two fixed lantern rings are fixedly connected to the positions, located on the two sides of the pulley, between the two outer plates, the inner side of each outer plate is fixedly connected with a set of sliding rod bases and sliding rods, each set of sliding rods is slidably connected with movable lantern rings corresponding to the fixed lantern rings in position, and a set of brake winding ropes are fixedly connected between each fixed lantern ring and the corresponding movable lantern ring. And the steel wire rope passes through the centers of each fixed lantern ring and each movable lantern ring. By arranging the brake winding rope, the brake winding rope is rapidly tightened and wound on the outer side of the steel wire rope, the contact area of the brake winding rope and the steel wire rope is larger, friction force applied to the steel wire rope is more uniform, and the device is rapidly fixed to improve the anti-falling effect.

Description

Technical Field

[0001] The invention belongs to the field of cranes, and in particular relates to an anti-falling protection mechanism for a large shipbuilding gantry crane. Background Art

[0002] Gantry cranes are usually composed of a gantry, a lifting mechanism, a traveling mechanism and other parts. They can move on tracks and cover a larger working area. The picking device of a gantry crane is generally composed of a pulley or a pulley block and a picking mechanism such as a hook, a cage, an electromagnetic suction cup, a vacuum suction cup or a grab. The lifting wire rope is connected to the lifting drive mechanism of the lifting machinery through a pulley device, so that the picking device can lift or lower the weight.

[0003] Gantry cranes are widely used in ports, ships, shipbuilding and other scenarios. Shipbuilding gantry cranes need to be equipped with multiple safety devices, such as overload protection, limit switches, anti-collision systems, wind speed monitoring, etc., to ensure safety in bad weather or operational errors. Since most shipbuilding cranes are located at the seaside, the wire rope is exposed to a high-humidity and high-salt environment, which can easily cause corrosion of the wire rope and reduce its load capacity. If the wire rope breaks when working under load, when the lifting wire rope on one side accidentally loosens or breaks, the wire rope on that side no longer bears the load. Therefore, the suspended object falls with the moving pulley hook at the speed of free fall, causing accidents such as damage to the suspended object.

[0004] The existing anti-fall mechanism adopts a gravity sensor. When the wire rope breaks, the lifting device and the load fall together. The gravity sensor detects the fall and determines that the wire rope is broken. The lifting device is braked to fix it on the unbroken wire rope, which has an anti-fall effect. When the gravity sensor determines that the wire rope is broken, the lifting device and the load have already reached a certain falling speed, and then the wire rope is clamped. Therefore, there is a hysteresis defect. After the wire rope is clamped, the lifting device and the load have a certain falling speed and stop falling instantly, resulting in a large instantaneous tension on the other wire rope, which has the risk of overload disconnection.

[0005] A Chinese patent with publication number CN118387775B discloses an adaptive anti-fall crane protection mechanism, including a wire rope and a movable pulley arranged on the top surface of a picking mechanism, and also including a protection component arranged above the movable pulley, the protection component including a housing and a brake motor, the housing is fixedly connected to the picking mechanism through an inverted eight-shaped structure, the housing is provided with a channel for the wire rope to pass through at a position corresponding to the movable pulley, both sides of the channel are provided with horizontal slide rails along the length direction thereof, and each horizontal slide rail is slidably connected to two sliders, and a thick spring is provided between the two sliders, and a thin spring is provided between the end of the horizontal slide rail and the slider close to it; when the wire rope on one side is disconnected, the movable guide wheel on that side can move quickly, and the locking wheel on the same side cooperates to clamp the wire rope, and the disconnection at this time causes the wire rope to slow down or stop instantly, so that the picking mechanism will not fall quickly due to the moment when the wire rope is disconnected.

[0006] However, the above patent still has the following disadvantages:

[0007] 1. The above patent uses a brake wheel to clamp the wire rope for friction braking, which can only provide a good friction braking effect at the position where the clamping force is applied, and the contact area between the clamping wheel and the wire rope is small, resulting in poor braking effect and difficulty in providing a good friction braking effect.

[0008] 2. In actual use scenarios, since steel wire ropes are generally made of twisted steel wires, once the ends of the steel wire ropes break and become loose, the friction braking method used in the above patents can easily squeeze and deform the steel wire ropes, causing the braking effect to deteriorate.

[0009] 3. The trigger mechanism for friction braking in the above patent is realized by utilizing the elasticity of the spring. However, in actual use scenarios, the lifting device will inevitably shake. During the shaking, the slider connected to the spring in the above patent will shake and slide, which may easily cause the problem of false triggering and affect the normal operation of the lifting device. Summary of the invention

[0010] The present invention overcomes the deficiencies of the prior art and solves the technical problem that, by setting a brake rope, when the wire rope breaks, the dynamic ring and the fixed ring quickly move away from each other so that the brake rope is quickly tightened and wound around the outside of the wire rope. Compared with the traditional anti-fall structure, the contact area between the brake rope and the wire rope is larger, and the friction force applied to the wire rope is more uniform, so that the quick fixing device can improve the anti-fall effect. The setting of the double-layer brake rope provides double insurance. Even if the inner brake rope breaks due to sharp friction and a large impact, the outer brake rope can still provide sufficient friction to the wire rope, and the brake rope can adapt to brake wire ropes of different diameters, and the cylinder is used to quickly respond to provide At the same time as the initial braking force, the electric drive cylinder can be driven to extend outward to support the push plate, which is then superimposed with the braking force provided by the cylinder. The cylinder first performs rapid initial braking, and then the electric drive cylinder provides stable braking effect after the initial braking, thereby ensuring the braking response speed and braking effect at the same time to prevent the device and the load from falling. A rotating plate and a guide wheel are set, and a wire rope is used to make the pressure plate generate pressure on the pressure sensor to determine whether the wire rope exceeds the load capacity and whether it is broken, so as to quickly respond to braking protection. When the device shakes, no matter in which direction the device shakes, the wire rope can always generate a component force to press the pressure plate to the pressure sensor, thereby effectively avoiding false triggering and ensuring that the device can work normally.

[0011] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a large shipbuilding gantry crane anti-fall protection mechanism, comprising:

[0012] An outer plate, a hook is fixedly connected between the bottoms of the two outer plates, a pulley is rotatably connected between the two outer plates above the hook, a steel wire rope is wound around the outer side of the pulley, and the two outer plates are fixedly connected by a bracket;

[0013] A fixed sleeve ring, two symmetrical fixed sleeve rings are fixedly connected between the two outer plates at both sides of the pulley, a group of sliding rod seats are fixedly connected to the inner side of each outer plate above the fixed sleeve ring, sliding rods are fixedly connected between each group of sliding rod seats, a moving sleeve ring corresponding to the position of the fixed sleeve ring is slidably connected on each group of sliding rods, and a group of brake cables are fixedly connected between each fixed sleeve ring and the corresponding moving sleeve ring;

[0014] The steel wire rope passes through the center of each fixed sleeve ring and the movable sleeve ring, two groups of trigger components are symmetrically arranged between the two outer plates, and the steel wire rope passes through the two groups of trigger components respectively.

[0015] Furthermore, each group of the brake cables is double-layered, each layer of the brake cables is formed by spirally winding a plurality of brake cables, the two layers of the brake cables are closely arranged, and the spiral directions of the two layers of the brake cables are opposite and staggered.

[0016] Furthermore, each brake cable is made of a metal material with toughness, and a surface of each brake cable is coated with a rough coating.

[0017] Furthermore, a push plate is fixedly connected to one side of each of the moving sleeve rings, and a group of cylinder seats are fixedly connected between the two outer plates at the corresponding position of each push plate. A cylinder is fixedly connected to each group of cylinder seats, and the extended end of each cylinder points to the push plate. The bottom of each cylinder is respectively connected to an electric control valve and a pressure relief valve, and each electric control valve is connected to a compressed gas cylinder at one end away from the cylinder.

[0018] Furthermore, an electric drive cylinder is fixedly connected between each group of cylinder seats at one side of the cylinder, and the extended end of each electric drive cylinder points to the corresponding push plate.

[0019] Furthermore, the trigger component includes a rotating plate, and two groups of symmetrical rotating plates are rotatably connected between the two outer plates, and a group of guide wheels are rotatably connected between each group of rotating plates, and the wire ropes are interlaced and wound through the two groups of guide wheels.

[0020] Furthermore, a pressure plate is fixedly connected to the end of each group of rotating plates at the side away from the wire rope, a sensor seat is fixedly connected to the corresponding position of each pressure plate between the two outer plates, and a pressure sensor abutting the pressure plate is fixedly connected to the side of each sensor seat close to the pressure plate.

[0021] Furthermore, a coil spring is fixedly connected to the outer side of one end of the axis of each rotating plate extending out of the outer plate, a coil spring cover is fixedly connected to the outer side of each outer plate at a position corresponding to each coil spring, and each coil spring cover is fixedly connected to the corresponding end of the coil spring.

[0022] Furthermore, a controller seat is fixedly connected between the two outer plates and between the two groups of rotating plates, a controller unit is fixedly connected to the controller seat, and the controller unit is electrically connected to the pressure sensor.

[0023] Furthermore, a top cover is arranged above the two outer plates, and a rope threading hole for allowing the steel wire rope to pass through is opened on the top cover at the corresponding position of the steel wire rope, and symmetrical inclined surfaces are arranged below the rope threading hole at the corresponding position of the two sets of guide wheels.

[0024] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0025] (1) By setting the brake rope, when the wire rope breaks, the dynamic ring and the fixed ring can quickly move away to allow the brake rope to be quickly tightened and wrapped around the outside of the wire rope. Compared with the traditional anti-fall structure, the contact area between the brake rope and the wire rope is larger, and the friction force applied to the wire rope is more uniform, so that the quick fixing device can improve the anti-fall effect.

[0026] (2) The double-layer brake rope provides double insurance. Even if the inner brake rope breaks due to sharp friction and large impact, the outer brake rope can still provide sufficient friction to the wire rope, and the brake rope can adapt to brake wire ropes of different diameters.

[0027] (3) While utilizing the rapid response of the air cylinder to provide initial braking force, the electric drive cylinder can be driven to extend outward to support the push plate, thereby superimposing the braking force provided by the air cylinder. The air cylinder first performs rapid initial braking, and then the electric drive cylinder provides a stable braking effect after the initial braking, thereby simultaneously ensuring the braking response speed and braking effect, and preventing the device and load from falling.

[0028] (4) A rotating plate and a guide wheel are provided, and a steel wire rope is used to make the pressure plate generate pressure on the pressure sensor to determine whether the steel wire rope exceeds the load capacity and whether it is broken, and then quickly respond to brake protection. When the device shakes, no matter in which direction the device shakes, the steel wire rope can always generate a component force to press the pressure plate toward the pressure sensor, thereby effectively avoiding the occurrence of false triggering and ensuring that the device can work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional schematic diagram of this patent.

[0030] Figure 2 This is a side view of the patent.

[0031] Figure 3 for Figure 2 Stereoscopic cross-sectional view at AA in the middle.

[0032] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0033] Figure 5 This is a schematic diagram of the structure of this patent.

[0034] Figure 6 for Figure 5 A partial enlarged view of point C in the middle.

[0035] Figure 7 This is a schematic diagram of the structure of the brake cable.

[0036] Figure 8 A schematic diagram of the structure of the trigger component.

[0037] Explanation of the reference numerals in the accompanying drawings: outer plate 10; hook 11; pulley 12; wire rope 13; fixed sleeve ring 14; movable sleeve ring 15; brake rope 16; push plate 17; cylinder 18; electric drive cylinder 19; cylinder seat 20; electric control valve 21; compressed gas cylinder 22; pressure relief valve 23; rotating plate 24; guide wheel 25; pressure plate 26; sensor seat 27; pressure sensor 28; coil spring 29; coil spring cover 30; slide rod seat 31; slide rod 32; top cover 33; rope threading hole 34; controller seat 35; controller unit 36; bracket 37. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] like Figure 1-8 As shown, a fall protection mechanism for a large shipbuilding gantry crane comprises an outer plate 10, a hook 11 is fixedly connected between the bottoms of two outer plates 10, a pulley 12 is rotatably connected between the two outer plates 10 at a position above the hook 11, a steel wire rope 13 is wound around the outer side of the pulley 12, two fixed sleeve rings 14 are symmetrically distributed and fixedly connected at both sides of the pulley 12 between the two outer plates 10, and are respectively sleeved around the outer side of the steel wire rope 13, a movable sleeve ring 15 is arranged above each fixed sleeve ring 14 and sleeved around the outer side of the steel wire rope 13, and each movable sleeve ring 15 is provided with a brake cable 16 wrapped around the outer side of the steel wire rope 13 between the corresponding fixed sleeve ring 14, each group of brake cables 16 is double-layered, each layer of brake cables 16 is formed by spirally winding a plurality of brake cables 16, the spiral directions of the two layers of brake cables 16 are opposite and staggered, each brake cable 16 is made of a tough metal material, and the surface of each brake cable 16 is coated with a rough coating.

[0040] By providing the brake rope 16, when the steel wire rope 13 breaks, the movable ring 15 and the fixed ring 14 can quickly move away to allow the brake rope 16 to be quickly tightened and wound around the outside of the steel wire rope 13. Compared with the traditional anti-fall structure, the contact area between the brake rope 16 and the steel wire rope 13 is larger, and the friction force applied to the steel wire rope 13 is more uniform, thereby realizing a quick fixing device to improve the anti-fall effect.

[0041] Moreover, the double-layer brake cable 16 provides double insurance. Even if the inner brake cable 16 breaks due to sharp friction and a large impact, the outer brake cable 16 can still provide sufficient friction to the steel wire rope 13. Moreover, since the two layers of brake cables 16 are arranged in opposite spiral directions, the two layers of brake cables 16 are interlaced and pressed against each other when tightened, so that the brake cables 16 form a mesh structure on the outside of the steel wire rope 13, which fits the surface of the steel wire rope 13 more evenly, thereby improving the structural strength and braking effect of the brake cables 16.

[0042] like Figure 1-8 As shown, a push plate 17 is fixedly connected to one side of each movable sleeve ring 15, and a group of cylinder seats 20 are fixedly connected between the two outer plates 10 at the corresponding position of each push plate 17. A cylinder 18 is fixedly connected to each group of cylinder seats 20, and the extended end of each cylinder 18 points to the push plate 17. The bottom of each cylinder 18 is respectively connected to an electric control valve 21 and a pressure relief valve 23, and one end of each electric control valve 21 away from the cylinder 18 is connected to a compressed gas cylinder 22. An electric drive cylinder 19 is fixedly connected at one side of the cylinder 18 between each group of cylinder seats 20, and the extended end of each electric drive cylinder 19 points to the corresponding push plate 17.

[0043] By providing the air cylinder 18 and the electric control valve 21, the air pressure in the compressed air cylinder 22 can be quickly released when the wire rope 13 breaks, so that the air cylinder 18 can quickly lift the movable sleeve ring 15, thereby quickly tightening the brake rope 16. The brake can be quickly reacted and braked at the moment the wire rope 13 breaks, effectively avoiding braking after the device and the load fall, resulting in the wire rope 13 on the other side being subjected to a large instantaneous tension and difficult to brake, and even the wire rope 13 breaking again.

[0044] Furthermore, while the air cylinder 18 responds quickly to provide a preliminary braking force, the electric drive cylinder 19 can be driven to extend outward to support the push plate 17, thereby superimposing the braking force provided by the air cylinder 18. The air cylinder 18 first performs a quick preliminary braking, and then the electric drive cylinder 19 provides a stable braking effect after the preliminary braking, thereby ensuring the braking response speed and braking effect at the same time, and preventing the device and the load from falling off.

[0045] like Figure 1-8As shown, two groups of symmetrical rotating plates 24 are rotatably connected between the two outer plates 10, and a group of guide wheels 25 are rotatably connected between each group of rotating plates 24. The wire ropes 13 are respectively wound and passed between the two groups of guide wheels 25 in an interlaced manner. A pressure plate 26 is fixedly connected to the end of each group of rotating plates 24 away from the side of the wire rope 13, and a sensor seat 27 is fixedly connected to the corresponding position of each pressure plate 26 between the two outer plates 10. A pressure sensor seat 27 is fixedly connected to the side of each sensor seat 27 close to the pressure plate 26 and abutted against the pressure plate 26. The pressure sensor 28 is provided, and a coil spring 29 is fixedly connected to the outside of one end of the axis of each rotating plate 24 extending out of the outer plate 10. A coil spring cover 30 is fixedly connected to the outside of each outer plate 10 at the corresponding position of each coil spring 29. Each coil spring cover 30 is fixedly connected to the corresponding end of the coil spring 29. A controller seat 35 is fixedly connected between the two groups of rotating plates 24 between the two outer plates 10. A controller unit 36 ​​is fixedly connected to the controller seat 35. The controller unit 36 ​​can be connected to the pressure sensor 28 and the cylinder seat 20 through wires.

[0046] By setting a rotating plate 24 and a guide wheel 25, and utilizing the weight of the device and the load, the wire rope 13 generates a component force in the horizontal direction on the guide wheel 25, so that the pressure plate 26 maintains a state of applying pressure to the pressure sensor 28 and compresses the coil spring 29. When one side of the wire rope 13 breaks, the coil spring 29 stretches and drives the rotating plate 24 and the guide wheel 25 to rotate, so that the pressure plate 26 no longer applies pressure to the pressure sensor 28. It is then possible to quickly determine whether the wire rope 13 is broken based on the pressure reading on the pressure sensor 28, and quickly drive the cylinder 18 to brake, thereby improving the braking response speed and ensuring the braking effect.

[0047] Furthermore, by providing a rotating plate 24 and a guide wheel 25, when the device shakes, no matter in which direction the device shakes, the wire rope 13 can always generate a component force to press the pressure plate 26 toward the pressure sensor 28, thereby effectively avoiding the occurrence of false triggering and ensuring that the device can work normally. During operation, if the pressure reading on the pressure sensor 28 exceeds the set threshold, it is determined that the load is overloaded, and then a message is sent to shut down the operation of the crane, thereby avoiding the wire rope 13 from breaking due to overload to protect safety.

[0048] like Figure 1-8 As shown, a top cover 33 is provided above the two outer panels 10, and the top cover 33 can be fixedly connected to the bottom of the mobile trolley of the crane. A rope threading hole 34 for allowing the wire rope 13 to pass through is opened on the top cover 33 at the position corresponding to the wire rope 13, and a symmetrical inclined surface is provided below the rope threading hole 34 at the position corresponding to the two sets of guide wheels 25.

[0049] By providing the top cover 33, when the device lifts the load and is lifted to the highest point, the guide wheel 25 at the top is squeezed by the inclined surface of the top cover 33, so that the pressure plate 26 applies greater pressure to the pressure sensor 28, and then the pressure sensor 28 is used to judge that the device has reached the top according to the sudden change in the pressure value, and then the winding device of the wire rope 13 can be controlled to stop working, thereby preventing the crane's top limit sensor from malfunctioning and causing the device to hit the top while the wire rope 13 continues to be pulled and causes the wire rope 13 to break.

[0050] In this embodiment, initially, the operator calibrates the reading of the pressure sensor 28 and sets the maximum pressure threshold of the pressure sensor 28 according to the load capacity of the wire rope 13. Under the action of the deadweight of the device, the wire rope 13 generates a horizontal component force at each guide wheel 25, so that the pressure plate 26 applies pressure to the pressure sensor 28 and keeps the coil spring 29 in a compressed state to store elasticity. Pressure data is generated on the pressure sensor 28 and transmitted to the controller unit 36. At this time, the air cylinder 18 and the electric drive cylinder 19 remain in a retracted state, and the brake cable 16 is in a relaxed and retracted state. The brake cables 16 are bonded to each other by an adhesive to maintain a cylindrical shape to avoid friction between the brake cable 16 and the surface of the wire rope 13 when the brake cable 16 is in a working state.

[0051] During normal operation, the hook 11 lifts a load such as a ship hull, and the crane's winding mechanism winds up the wire rope 13. The wire rope 13 slides between the guide wheel 25 and the pulley 12, thereby lifting the load hoisted by the device to achieve lifting work. In the lifting process, due to the increase in load, the horizontal component force generated by the wire rope 13 at the guide wheel 25 increases. If the pressure reading on the pressure sensor 28 exceeds the set threshold, the controller unit 36 ​​determines that the load weight exceeds the maximum weight that the wire rope 13 can bear. In order to avoid the wire rope 13 from breaking, a signal is sent to shut down the crane and not lift, thereby ensuring safety.

[0052] Furthermore, if the top limit sensor of the crane fails during operation, the device cannot rise any further when it is lifted to the top, and the wire rope 13 is still pulled, which may cause the wire rope 13 to eventually break. At this time, due to the provision of the top cover 33, when the device is lifted to the highest point, the guide wheel 25 is squeezed by the inclined surface of the top cover 33, thereby increasing the pressure applied by the pressure plate 26 to the pressure sensor 28. Similarly, when the pressure reading on the pressure sensor 28 exceeds the set threshold, the crane is shut down and no longer lifted, thereby avoiding the breakage of the wire rope 13 and ensuring safety.

[0053] Since most shipbuilding cranes are installed at the seaside, the wire rope 13 is exposed to a high-humidity and high-salt environment, which can easily cause corrosion of the wire rope 13 and reduce the load capacity of the wire rope 13. If the wire rope 13 breaks when working under load, at this moment, the guide wheel 25 on the side where the break occurs is no longer affected by the horizontal component force generated by the wire rope 13, and the coil spring 29 instantly releases its elasticity, so that the pressure of the pressure plate 26 on the pressure sensor 28 disappears instantly, and the reading on the pressure sensor 28 is zero, then it is determined that the wire rope 13 has broken, and the controller unit 36 ​​immediately controls all the electric control valves 21 to connect the air circuits, so that the compressed gas in the compressed gas cylinder 22 quickly rushes into the cylinder 18 to drive the cylinder 18 to extend quickly, then the end of the cylinder 18 lifts the push plate 17, causing the movable sleeve ring 15 to slide upward along the slide rod 32.

[0054] At the same time, the brake rope 16 is passively pulled by the ring 15 and released from the bonding and forming state, and is quickly tightened and gathered. The double-layer brake rope 16 with opposite spiral directions is quickly tightened to form a mesh structure, which contacts the surface of the wire rope 13 over a large area. The thrust of the cylinder 18 is converted into the friction force of the brake rope 16 on the surface of the wire rope 13, thereby braking the device to prevent it from falling, thereby achieving the function of preventing falling and protecting safety. The rapid response braking of the cylinder 18 can brake quickly, avoiding braking after the device and the load fall, which may affect the braking effect or cause a huge impact due to the inertia of falling.

[0055] The traditional method uses a hard brake pad or a brake wheel to clamp the wire rope 13 for friction braking, which can only provide a good friction braking effect at the position where the clamping force is applied. The wire rope 13 is generally made of twisted steel wires. Once the end of the wire rope 13 is broken and loose, the traditional friction braking method will easily squeeze and deform the wire rope 13, resulting in poor braking effect, and it is difficult to apply to the braking of wire ropes 13 of different diameters. The brake rope 16 is used to wrap around the wire rope 13 for braking, which can apply a circumferentially uniform friction force on the surface of the wire rope 13. Even if the end of the wire rope 13 is loose, the brake rope 16 can still tightly wrap the wire rope 13 to provide a good friction braking effect, and it is suitable for wire ropes 13 of different diameters.

[0056] Furthermore, since each layer of brake cables 16 is composed of a plurality of independent brake cables 16 that are spirally wound together, the plurality of brake cables 16 can evenly disperse the friction force and the impact force during braking, thereby reducing the risk of the brake cables 16 themselves breaking to ensure the friction braking effect. At the same time, since the brake cables 16 are double-layered, even if the inner layer of the brake cables 16 breaks due to severe friction or impact, the outer layer of the brake cables 16 can serve as a double insurance and can still provide a stable and good braking effect.

[0057] While the air cylinder 18 extends outward to pull the brake cable 16 for friction braking, the controller unit 36 ​​synchronously drives the electric cylinder 19 to extend outward to support the push plate 17 to provide a stable thrust. The cylinder 18 responds quickly and can apply thrust instantly to allow the brake cable 16 to quickly perform friction braking, but it cannot provide further braking force. Although the electric cylinder 19 responds slowly, it can subsequently provide a stable and strong thrust, thereby ensuring the braking effect. The combination of the air cylinder 18 and the electric cylinder 19 can ensure a fast response to braking while further providing a stable and strong braking force.

[0058] Furthermore, even if the cylinder 18 cannot operate due to leakage of the compressed gas cylinder 22 or failure of the electric control valve 21, the electric drive cylinder 19 can still provide a stable thrust and serve as a safety function. When the operator removes the brake to remove the device, the operator can control the electric drive cylinder 19 to retract and manually open the pressure relief valve 23 to release the gas in the cylinder 18, so that the cylinder 18 retracts, thereby loosening the brake rope 16 to remove the broken wire rope 13.

[0059] The above-mentioned cylinder 18, electric drive cylinder 19, electric control valve 21, compressed gas cylinder 22, pressure sensor 28, controller unit 36, etc. are mature existing technologies. The structures in the drawings are only for illustration and will not be described in detail herein.

[0060] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0061] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0062] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A large shipbuilding gantry crane anti-fall protection mechanism, characterized in that: The large shipbuilding gantry crane anti-fall protection mechanism comprises: The outer plate (10) includes a hook (11) fixedly connected between the bottoms of the two outer plates (10), a pulley (12) rotatably connected between the two outer plates (10) at a position above the hook (11), a steel wire rope (13) wound around the outer side of the pulley (12), and the two outer plates (10) are fixedly connected via a bracket (37); a fixed ring (14), two symmetrical fixed rings (14) are fixedly connected between the two outer plates (10) at both sides of the pulley (12), and each outer plate (10) is fixedly connected at a position above the fixed ring (14) on the inner side. A group of slide rod seats (31), each group of the slide rod seats (31) is fixedly connected with a slide rod (32), each group of the slide rod seats (31) is slidably connected with a movable ring (15) corresponding to the position of the fixed ring (14), and a group of brake ropes (16) is fixedly connected between each fixed ring (14) and the corresponding movable ring (15); wherein the steel wire rope (13) passes through the center of each fixed ring (14) and the movable ring (15), and two groups of trigger components are symmetrically arranged between the two outer plates (10), and the steel wire rope (13) passes through the two groups of trigger components respectively.

2. A large shipbuilding gantry crane anti-fall protection mechanism according to claim 1, characterized in that: Each group of the brake cables (16) is double-layered, each layer of the brake cables (16) is formed by spirally winding a plurality of brake cables (16), the two layers of the brake cables (16) are closely arranged with each other, and the spiral directions of the two layers of the brake cables (16) are opposite and staggered with each other.

3. A large shipbuilding gantry crane anti-fall protection mechanism according to claim 1, characterized in that: Each of the brake cables (16) is made of a tough metal material, and the surface of each of the brake cables (16) is coated with a rough coating.

4. A large shipbuilding gantry crane anti-fall protection mechanism according to claim 1, characterized in that: A push plate (17) is fixedly connected to one side of each movable sleeve ring (15); a group of cylinder seats (20) is fixedly connected between the two outer plates (10) at a position corresponding to each push plate (17); a cylinder (18) is fixedly connected to each group of cylinder seats (20); an extended end of each cylinder (18) points to the push plate (17); the bottom of each cylinder (18) is respectively connected to an electric control valve (21) and a pressure relief valve (23); and one end of each electric control valve (21) away from the cylinder (18) is connected to a compressed gas cylinder (22).

5. A large shipbuilding gantry crane anti-fall protection mechanism according to claim 4, characterized in that: An electric drive cylinder (19) is fixedly connected between each group of cylinder seats (20) at one side of the cylinder (18), and the extended end of each electric drive cylinder (19) points to the corresponding push plate (17).

6. A large shipbuilding gantry crane anti-fall protection mechanism according to claim 1, characterized in that: The trigger component comprises a rotating plate (24), two groups of rotating plates (24) symmetrical to each other are respectively rotatably connected between the two outer plates (10), a group of guide wheels (25) are respectively rotatably connected between each group of rotating plates (24), and the steel wire rope (13) is respectively wound and passed through between the two groups of guide wheels (25).

7. A large shipbuilding gantry crane anti-fall protection mechanism according to claim 6, characterized in that: A pressure plate (26) is fixedly connected to the end of each group of rotating plates (24) at a side away from the wire rope (13), a sensor seat (27) is fixedly connected to the corresponding position of each pressure plate (26) between the two outer plates (10), and a pressure sensor (28) abutting against the pressure plate (26) is fixedly connected to the side of each sensor seat (27) close to the pressure plate (26).

8. The anti-fall protection mechanism for a large shipbuilding gantry crane according to claim 6, characterized in that: A coil spring (29) is fixedly connected to the outer side of one end of the axis of each rotating plate (24) extending out of the outer plate (10), and a coil spring cover (30) is fixedly connected to the outer side of each outer plate (10) at a position corresponding to each coil spring (29), and each coil spring cover (30) is fixedly connected to the end of the corresponding coil spring (29).

9. The anti-fall protection mechanism for a large shipbuilding gantry crane according to claim 6, characterized in that: A controller seat (35) is fixedly connected between the two outer plates (10) and between the two groups of rotating plates (24). A controller unit (36) is fixedly connected to the controller seat (35). The controller unit (36) is electrically connected to the pressure sensor (28).

10. The anti-fall protection mechanism for a large shipbuilding gantry crane according to claim 1, characterized in that: A top cover (33) is arranged above the two outer plates (10), and a rope threading hole (34) for allowing the steel wire rope (13) to pass through is opened on the top cover (33) at a position corresponding to the steel wire rope (13), and a symmetrical inclined surface is arranged below the rope threading hole (34) at a position corresponding to the two sets of guide wheels (25).

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