A shipbuilding gantry crane load limit mechanism

Abstract

The application discloses a shipbuilding gantry crane lifting capacity limiting mechanism and relates to the technical field of shipbuilding gantry cranes.The shipbuilding gantry crane lifting capacity limiting mechanism comprises a gantry crane main body and a lifting assembly installed on the gantry crane main body, and the lifting assembly comprises a travelling vehicle body and a pay-off component.The application drives the top pressing shaft and the top pressing plate to perform top pressing and braking work in the travelling track of the travelling vehicle body by controlling the extension and retraction of the movable ring plate, solves the problem that the traditional shipbuilding gantry crane limiting mechanism only relies on the adhesion friction force between the travelling wheel and the track to achieve braking and stopping in the seaside high-salt-mist environment, and is prone to braking slip and vehicle sliding, and is favorable for improving the stability of the shipbuilding gantry crane limiting mechanism in the seaside high-salt-mist environment.When the travelling vehicle body travels, the application is followed by the salt removing component to travel along with the travelling vehicle body, synchronously performs follow-up cleaning on the inner wall of the track, does not need manual high-altitude operation, is favorable for improving the practicability of the shipbuilding gantry crane limiting mechanism, and reduces the labor intensity of personnel.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding gantry crane technology, specifically to a shipbuilding gantry crane lifting capacity limiting mechanism. Background Technology

[0002] Shipbuilding gantry cranes are widely used in shipbuilding yards. The accompanying traveling cranes are mainly responsible for the hoisting, transfer and aerial positioning of hull sections and large steel structures. The lifting capacity limiting mechanism is the core safety protection component of the traveling crane. It is mainly used to limit the rated lifting load of the equipment and prevent overloading. At the same time, it also takes into account the parking brake and position locking functions of the traveling crane.

[0003] Currently, traditional traveling mechanisms all use braked traveling wheels, relying on the adhesion friction between the traveling wheels and the track to achieve braking. However, in the high salt spray environment at the seaside, the track surface is prone to salt crystals, moisture, and rust. Salt crystals are granular and have a self-lubricating and isolating effect, like a layer of fine salt, which directly and significantly reduces the friction coefficient between the wheel and the track. When the wheel brakes, it will spin, slip, and roll away, which can easily lead to problems such as braking slippage and rollaway. This results in poor stability of the shipbuilding gantry crane's limiting mechanism when working in the high salt spray environment at the seaside.

[0004] Meanwhile, the inner wall of the travel track of the traditional shipbuilding gantry crane restriction mechanism is prone to long-term accumulation of salt crystals, rust, dust and debris due to the high salt spray environment at the seaside. Moreover, there is no follow-up cleaning method, and it can only rely on manual high-altitude cleaning when the machine is stopped. High-altitude operation is risky, labor-intensive and inefficient, resulting in poor practicality of the shipbuilding gantry crane restriction mechanism.

[0005] Furthermore, traditional wire-laying components rely solely on a single braking protection device, the high-speed shaft brake at the front end. The braking force is applied only to the motor and reducer transmission chain, and cannot directly lock the wire-laying component itself. If a fault occurs, such as broken gear teeth, broken transmission shaft, or failure of coupling, the front brake loses its restraining effect, and the wire-laying component will freely rotate due to inertia, causing major safety hazards such as rope slippage, hook slippage, and falling of heavy objects, resulting in poor safety performance of shipbuilding gantry crane limiting mechanisms. Summary of the Invention

[0006] To address the above problems, this invention provides a shipbuilding gantry crane lifting weight limiting mechanism, which solves the aforementioned issues.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a shipbuilding gantry crane lifting weight limiting mechanism, comprising a gantry crane body and a lifting assembly installed on the gantry crane body, the lifting assembly comprising a traveling carriage and a wire-laying component, a clamping component connected to the traveling carriage, and limit seats connected to both sides of the traveling carriage, each of the limit seats having an oil cavity, the oil cavity having a plurality of positioning ring plates and a plurality of movable ring plates, wherein the exterior of one of the positioning ring plates is fixedly connected to the oil cavity, and the plurality of movable ring plates are connected to the oil cavity, and one side of some of the positioning ring plates is connected to one side of the movable ring plates; One side of the positioning ring plate is connected to several elastic spokes, and the movable ring plate is provided with several sliding grooves. The other end of each elastic spoke is connected to a sliding groove. One side of the positioning ring plate is provided with several sliding grooves, and the movable ring plate is connected to several elastic spokes. The other end of each elastic spoke is connected to a sliding groove. The elastic spokes and elastic spokes are alternately distributed.

[0008] Preferably, a plurality of oil discharge holes are provided on a plurality of positioning ring plates and a plurality of movable ring plates, and a top pressure shaft is connected to one side of one of the movable ring plates. The top pressure shaft is disposed in the oil cavity and a top pressure plate is connected to one end of the top pressure shaft.

[0009] Preferably, the limiting seat has two storage slots on one side, and each of the storage slots is provided with a desalination component. The desalination component includes a lifting shaft. The limiting seat has two oil passages. The lifting shaft is installed in the oil passages. One end of the lifting shaft is connected to a float plate, which is disposed in the storage slot.

[0010] Preferably, a guide is connected to the top of the float, a support is connected to the bottom of the float, a driven member is connected to one side of the support, and the driven member is slidably connected in the guide. When the float drives the guide to float downward, the driven member will move in the guide.

[0011] Preferably, the external connection of the support frame includes two side wiping rollers and two lower wiping rollers. Each side of the side wiping rollers and lower wiping rollers is provided with several floating grooves. Each of the several floating grooves is provided with a return spring and an alternating wiping shaft. The two ends of the alternating wiping shaft are respectively connected to one end of the return spring, and the two ends of the alternating wiping shaft move axially in the floating groove.

[0012] Preferably, the limiting seat is connected to an oil distribution pipe, which is connected to the oil cavity and two oil passages respectively. The other end of the oil distribution pipe is connected to the oil storage tank, and the oil distribution pipe controls the movement of the oil in the oil cavity and the two oil passages.

[0013] Preferably, the float is connected to an extraction tube, the extraction tube is connected to a plurality of suction heads, the limiting seat is provided with a temporary storage groove, one end of the extraction tube is disposed in the temporary storage groove, and one side of the temporary storage groove is connected to an opening and closing plate.

[0014] Preferably, the wire feeding component includes a wire drum and two reels. The wire drum is connected to a hook by a wire rope. The traveling trolley is equipped with two motors and two transmission boxes. The output end of the motor is connected to a drive shaft, which is connected to the transmission box. One end of the reel is connected to the transmission box, and one end of the drive shaft is connected to a brake wheel.

[0015] Preferably, the clamping component includes a mounting base, which is mounted on a traveling trolley. Two clamping arms are connected to the mounting base, and a clamping element is connected to one side of each of the two clamping arms. A salt scraper is provided on both sides of the clamping element.

[0016] Preferably, a positioning frame is connected to the mounting base, a linkage frame is rotatably connected to the positioning frame, a hydraulic cylinder is connected to one side of the mounting base, the output end of the hydraulic cylinder is connected to one end of the linkage frame, the other end of the linkage frame is connected to one of the clamping arms, a connecting frame is connected to one side of the linkage frame, and one end of the connecting frame is connected to another clamping arm.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This application controls the oil body through the oil distribution pipe, so that the oil body flows in the oil cavity and oil passage, thereby controlling the extension and retraction of the movable ring plate to drive the top pressure shaft and top pressure plate to perform top pressure braking work on the traveling track of the traveling vehicle. This solves the problem that the traditional shipbuilding gantry crane limiting mechanism relies solely on the adhesion friction between the traveling wheel and the track to achieve braking in the high salt spray environment at the seaside, which is prone to braking slippage and runaway. This is beneficial to improving the stability of the shipbuilding gantry crane limiting mechanism in the high salt spray environment at the seaside.

[0018] 2. When the traveling vehicle moves, this application uses a desalination component that moves along with the traveling vehicle to simultaneously clean the inner wall of the track. This eliminates the need for manual climbing to work at heights, completely avoiding the safety risks of working at heights. When the traveling vehicle brakes, the component retracts into the limit seat to form a protective shield. This solves the problem that the inner wall of the traveling track of traditional shipbuilding gantry crane limiting mechanisms is prone to long-term accumulation of salt crystals, rust, dust, and debris due to the high salt spray environment at the seaside. Furthermore, there is no follow-up cleaning method, and the only option is to rely on manual cleaning at heights after stopping the machine. This results in high risks, high labor intensity, and low cleaning efficiency at heights. This invention improves the practicality of shipbuilding gantry crane limiting mechanisms and reduces the labor intensity of personnel.

[0019] 3. This application achieves control over the operation of the top pressure plate and the desalination component through the coordination of the oil distribution pipe, oil cavity, and oil passage. When the shipbuilding gantry crane limiting mechanism is moving, oil is filled into the oil passage to control the operation of the desalination component. When the shipbuilding gantry crane limiting mechanism is fixed, oil enters the oil cavity to control the operation of the top pressure plate. In case of emergency, the oil distribution pipe directly supplies oil into the oil cavity to achieve emergency braking. This realizes fully automatic oil circuit linkage control for moving desalination and parking braking, eliminating the need for frequent start-stop operations by dedicated personnel and improving the automation level of the shipbuilding gantry crane limiting mechanism.

[0020] 4. This application can directly clamp and lock the outer periphery of the wire-laying component through the clamping component, which can directly act on the braking actuator. Under normal braking conditions, it can share the braking torque of the main brake, improving braking stability and reliability. Under emergency conditions, it can quickly intervene and lock the wire-laying component. This solves the problem that traditional wire-laying components rely solely on the front high-speed shaft brake for braking protection, and the braking force only acts on the motor and reducer transmission chain, which cannot directly lock the wire-laying component body, resulting in poor braking effect and safety risks. This is beneficial to improving the safety performance of shipbuilding gantry crane restriction mechanisms. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lifting component structure of the present invention; Figure 3 This is a schematic diagram of the wire feeding component structure of the present invention; Figure 4 This is a perspective view of the limiting seat structure of the present invention; Figure 5 This is a schematic diagram of the oil cavity structure of the present invention; Figure 6 This is a partial structural diagram of the present invention; Figure 7 This is a schematic diagram of the desalination component structure of the present invention; Figure 8 This is a schematic cross-sectional view of the limiting seat structure of the present invention; Figure 9 This is a schematic diagram of the clamping component structure of the present invention.

[0022] The diagram shows the following components: 1. Gantry crane body; 2. Lifting assembly; 3. Traveling vehicle body; 4. Limit seat; 5. Oil chamber; 6. Positioning ring plate; 7. Movable ring plate; 8. Elastic spoke plate one; 9. Sliding groove one; 10. Elastic spoke plate two; 11. Sliding groove two; 12. Oil discharge hole; 13. Top pressure shaft; 14. Top pressure plate; 15. Storage groove; 16. Desalination component; 17. Oil passage; 18. Lifting shaft; 19. Float plate; 20. Guide component; 21. Follower component; 22. Support frame; 23. Side wiping roller; 24. 25. Lower wiping roller; 26. Floating trough; 27. Return spring; 28. Alternating wiping shaft; 29. ​​Oil distribution pipe; 30. Extraction pipe; 31. Suction head; 32. Temporary storage tank; 33. Opening and closing plate; 34. Wire feeding component; 35. Drum; 36. Wire guide drum; 37. Hook; 38. Transmission box; 39. Motor; 40. Brake wheel; 41. Clamping component; 42. Mounting base; 43. Clamping arm; 44. Clamping piece; 45. Salt scraper; 46. Positioning frame; 47. Linkage frame; 48. Hydraulic cylinder; 49. Connecting frame. Detailed Implementation

[0023] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0024] Please see Figure 1 , Figure 2 , Figure 3A shipbuilding gantry crane lifting weight limiting mechanism includes a gantry crane body 1 and a lifting assembly 2 installed on the gantry crane body 1. The lifting assembly 2 includes a traveling vehicle 3 and a wire-laying component 33. When the shipbuilding gantry crane is working, it lifts the object to be hoisted through the lifting assembly 2. Specifically, the wire-laying component 33 can raise and lower the hook 36 and the object being hoisted. At the same time, the traveling vehicle 3 moves the object being hoisted. It is worth noting that a pin-type load cell is installed at the center pin position of the wire guide tube 35 of the wire-laying component 33. The wire rope passes around the wire guide tube 35 and connects to the hook 36 to realize the hoisting. During operation, the lifting load is transmitted to the guide drum 35 via the wire rope. The pin-type load cell collects the shear force and tension signals borne by the shaft in real time and converts them into electrical signals, which are then transmitted to the control unit. The control unit converts the collected tension signals into the actual lifting weight according to the preset pulley ratio calibration parameters, achieving accurate monitoring of the lifting weight. More specifically, the moving speed of the traveling vehicle 3 is adjusted appropriately according to the weight of the object being lifted. When the control unit detects that the actual lifting weight exceeds the rated threshold, it immediately triggers the lifting weight limit protection logic, which links the braking of the traveling vehicle 3 and the pressure plate 14 to press against the rail. The inner wall and wire-laying component 33 stop working, and the clamping component 40 locks the wire rope to prevent overload operation and safety hazards. The clamping component 40 is connected to the traveling vehicle body 3. Limit seats 4 are connected to both sides of the traveling vehicle body 3. Each of the limit seats 4 has an oil cavity 5. The oil cavity 5 is equipped with a number of positioning ring plates 6 and a number of movable ring plates 7. One of the positioning ring plates 6 is fixedly connected to the outside of the oil cavity 5. Several movable ring plates 7 are connected to the oil cavity 5. One side of some positioning ring plates 6 is connected to one side of movable ring plates 7. When the traveling vehicle body 3 brakes, the oil distribution pipe 28 connects to the oil cavity 5. When oil is added, the oil injected into the oil chamber 5 will push the top pressure shaft 13 to move outward, causing the top pressure shaft 13 to pull several movable ring plates 7 to move, and drive the top pressure plate 14 to move outward to press against the inside of the travel track of the traveling vehicle 3. This, together with the braking of the traveling vehicle 3 itself, will brake the shipbuilding gantry crane limiting mechanism. This solves the problem that the traditional shipbuilding gantry crane limiting mechanism relies solely on the adhesion friction between the traveling wheel and the track to achieve braking in the high salt spray environment at the seaside, which is prone to braking slippage and runaway. This helps to improve the stability of the shipbuilding gantry crane limiting mechanism in the high salt spray environment at the seaside. It should be further explained that when the top pressure plate 14 and the top pressure shaft 13 move outward, the movable ring plate 7 will also move, causing one end of several elastic spokes 1 8 and elastic spokes 2 10 located between the positioning ring plate 6 and the movable ring plate 7 to move and deform and elongate. Specifically, when the movable ring plate 7 moves, it will move away from the positioning ring plate 6, causing one end of elastic spokes 1 8 to move in the sliding groove 1 9, while elastic spokes 1 8 deforms and elongates. One end of elastic spokes 2 10 moves in the sliding groove 2 11, while elastic spokes 2 10 deforms and elongates. More specifically, elastic spoke 8 and elastic spoke 10 are precipitation-hardening stainless steel spring plates. After precipitation hardening treatment, their elastic limit, tensile strength and resilience are extremely high. Within the design deformation range, they undergo reversible elastic deformation when stretched, storing elastic potential energy. After depressurization, the potential energy is completely released, driving the movable ring plate 7, top pressure shaft 13 and top pressure plate 14 to reset without permanent deformation or insufficient resilience. Furthermore, they can withstand tens of thousands of repeated tensile deformations without fatigue fracture, making them suitable for the frequent operation of your braking mechanism. Their service life is far longer than that of ordinary carbon steel spring steel. Please see Figure 4 , Figure 5 A number of elastic spokes 8 are connected to one side of the positioning ring plate 6. A number of sliding grooves 9 are provided on the movable ring plate 7. The other end of the elastic spokes 8 is connected to the sliding groove 9. A number of sliding grooves 11 are provided on one side of the positioning ring plate 6. A number of elastic spokes 10 are connected to the movable ring plate 7. The other end of the elastic spokes 10 is connected to the sliding groove 11. The number of elastic spokes 8 and the number of elastic spokes 10 are alternately distributed.

[0025] Please see Figure 6 Several positioning ring plates 6 and several movable ring plates 7 are provided with several oil discharge holes 12. One side of one of the movable ring plates 7 is connected to a top pressure shaft 13. The top pressure shaft 13 is set in the oil cavity 5. One end of the top pressure shaft 13 is connected to a top pressure plate 14. When the traveling vehicle 3 moves in the traveling track on the gantry body 1, the traveling vehicle 3 is in a non-stop state. At this time, the oil distribution pipe 28 transfers the oil in the oil cavity 5 to the oil passage 17, so that the oil in the oil passage 17 pushes the desalination component 16 out and descends. At the same time, the elastic spoke 1 8 and the elastic spoke 2 10 will be reset due to the characteristics of their materials, thereby driving the movable ring plate 7, the top pressure shaft 13 and the top pressure plate 14 to reset. Specifically, the oil in the oil passage 17 pushes the lifting shaft 18 down, causing the desalination component 16 to extend from the storage groove 15 until it contacts the bottom surface of the travel track. In this way, the desalination component 16 will desalinate the inner wall of the travel track during the movement of the travel vehicle 3. Of course, one end of the oil distribution pipe 28 is connected to the oil storage tank. In other words, under normal conditions, the oil only flows in the oil chamber 5 and the oil passage 17. When the vehicle body 3 brakes and stops, the top pressure plate 14 works and the desalting component 16 retracts into the storage tank 15. However, in an emergency, the oil distribution pipe 28 can directly inject new oil into the oil chamber 5 to achieve emergency auxiliary braking, avoid oil circuit switching delay, and thus ensure safety in an emergency.

[0026] Please see Figure 7 , Figure 8 Two storage slots 15 are provided on one side of the limiting seat 4. Each of the storage slots 15 is equipped with a desalination component 16. The desalination component 16 includes a lifting shaft 18. Two oil passages 17 are provided in the limiting seat 4. The lifting shaft 18 is installed in the oil passages 17. One end of the lifting shaft 18 is connected to a float 19, which is located in the storage slot 15. It should be noted that a spring 1 is provided in the limiting seat 4. When the float 19 descends, the spring 1 will be stretched. When the oil in the oil passage 17 is transferred, the spring 1 will drive the float 19 to reset. In addition, a spring 2 is also provided in the support frame 22. When the two side wiping rollers 23 expand, the spring 2 will be stretched. When the desalination component 16 retracts, the spring 2 will reset the support frame 22, thereby realizing the reset of the two side wiping rollers 23. The above-mentioned spring reset measures are all conventional and well-known technologies, which are conventional means that can be understood and implemented by those skilled in the art based on common sense. Therefore, they will not be described in detail here.

[0027] A guide member 20 is connected to the top of the float 19, and a support frame 22 is connected to the bottom of the float 19. A driven member 21 is connected to one side of the support frame 22. The driven member 21 is slidably connected in the guide member 20. When the float 19 pushes the guide member 20 downward, the driven member 21 will move in the guide member 20. When the desalination unit 16 is working, the lifting shaft 18 drives the float 19, support frame 22 and other components to descend. When the lower wiping roller 24 contacts the inner bottom surface of the traveling track, the float 19 can still move downward. It should be noted that at this time, the float 19... The descent involves only the lifting shaft 18 and the float 19, while the other components remain in place and fixed. At this time, the descent of the float 19 will cause the guide 20 to descend, while the driven member 21 at one end of the support frame 22 is fixed. Therefore, when the guide 20 descends, it will cause the driven member 21 to move to both sides along the guiding direction of the guide 20, thereby causing the two side wiping rollers 23 to move to both sides and contact the two sides of the travel track. At this point, the lower wiping roller 24 is in contact with the inner bottom surface of the travel track, and the two side wiping rollers 23 are in contact with the two inner sides of the travel track.

[0028] The support frame 22 is externally connected to two side rubbing rollers 23 and two lower rubbing rollers 24. Each side of the side rubbing rollers 23 and lower rubbing rollers 24 has several floating grooves 25, each containing a return spring 26 and an alternating rubbing shaft 27. Both ends of the alternating rubbing shaft 27 are connected to one end of the return spring 26. The two ends of the alternating rubbing shaft 27 move axially within the floating grooves 25. When the vehicle body 3 moves, the lower rubbing rollers 24 roll against the inner bottom surface of the travel track, and the two side rubbing rollers 23 roll against the inner surface of the travel track. Side rolling friction utilizes the wear-resistant scraping layer on the outer periphery of the roller to adhere to and roll against the inner wall of the track, crushing, peeling off, and sweeping away salt crystals, floating salt rust, mud, and debris adhering to the inner side and bottom surface of the track. Through simultaneous cleaning on the two sides and bottom, real-time desalination of the inner side of the track is achieved without dead angles, effectively preventing the accumulation and hardening of salt scale from causing braking slippage, track corrosion, and mechanism jamming. Moreover, the rolling friction cleaning method avoids rigid scraping, thus preventing damage to the track body and ensuring smooth and jam-free operation. Furthermore, during the rolling of the side wiping roller 23 and the lower wiping roller 24, several alternating wiping shafts 27 will rotate one by one. As these alternating wiping shafts 27 rotate, they will extend and retract one by one in the floating trough 25. Specifically, when the alternating wiping shaft 27 extends, its two ends will respectively stretch the return spring 26 in the lower wiping roller 24 and the return spring 26 in the side wiping roller 23. When the alternating wiping shaft 27 returns to its original position, the return springs 26 at both ends will return together, causing both sides of the alternating wiping shaft 27 to retract into the floating trough 25. It should be noted that the extension and retraction of the alternating wiping shaft 27 are carried out alternately as the lower wiping roller 24 and the side wiping roller 23 roll. When the alternating wiping shaft 27 extends, it can perform desalination work at the corners of the travel track, thereby achieving all-round desalination. The desalination component 16 moves with the traveling vehicle 3, simultaneously cleaning the inner wall of the track. This eliminates the need for manual climbing to work at heights, completely avoiding the safety risks of working at heights. When the traveling vehicle brakes, it retracts into the limit seat 4 to form a protective shield. This solves the problem that the inner wall of the traveling track of the traditional shipbuilding gantry crane limiting mechanism is prone to long-term accumulation of salt crystals, rust, dust, and debris due to the high salt spray environment at the seaside. Furthermore, there is no follow-up cleaning method, and it can only rely on manual high-altitude cleaning when the machine is stopped. This results in high risks, high labor intensity, and low cleaning efficiency at heights. This improves the practicality of the shipbuilding gantry crane limiting mechanism and reduces the labor intensity of personnel.

[0029] The limiting seat 4 is connected to an oil distribution pipe 28, which is connected to the oil cavity 5 and the two oil passages 17 respectively. The other end of the oil distribution pipe 28 is connected to the oil storage tank. The oil distribution pipe 28 controls the movement of the oil in the oil cavity 5 and the two oil passages 17.

[0030] A suction pipe 29 is connected to the float plate 19, and several suction heads 30 are connected to the suction pipe 29. A temporary storage groove 31 is provided on the limiting seat 4. One end of the suction pipe 29 is set in the temporary storage groove 31. A hinged plate 32 is connected to one side of the temporary storage groove 31. When the travel track is desalted, the side wiping roller 23 and the lower wiping roller 24 roll along the inner wall of the travel track to crush, scrape and peel off the salt crystals, hardened salt scale, floating salt and rust residue attached to the inner side and bottom of the track. Then, several suction heads 30 on one side use negative pressure adsorption to uniformly absorb the salt particles, salt powder and impurities that have been cleaned by the wiping rollers, and then transport them through the suction pipe 29 and discharge them into the temporary storage groove 31 for centralized storage.

[0031] The wire-laying component 33 includes a wire drum 35 and two reels 34. The wire drum 35 is connected to a hook 36 via a wire rope. The traveling trolley is equipped with two motors 38 and two transmission boxes 37. The output end of the motor 38 is connected to a drive shaft, which is connected to the transmission box 37. One end of the reel 34 is connected to the transmission box 37, and one end of the drive shaft is connected to a brake wheel 39. When lifting an object, the output end of the motor 38 drives the drive shaft to rotate, transmitting power to the transmission box 37 and causing the reel 34 to rotate. This causes the reel 34 to unwind and wind the wire rope wound around it. The wire rope passes around the wire drum 35 and drives the hook 36 to rise and fall, thereby lifting the object.

[0032] Please see Figure 9 The clamping component 40 includes a mounting base 41, which is mounted on a traveling trolley. Two clamping arms 42 are connected to the mounting base 41. A clamping element 43 is connected to one side of each clamping arm 42. A salt scraping plate 44 is provided on both sides of the clamping element 43.

[0033] A positioning frame 45 is connected to the mounting base 41, and a linkage frame 46 is rotatably connected to the positioning frame 45. A hydraulic cylinder 47 is connected to one side of the mounting base 41, and the output end of the hydraulic cylinder 47 is connected to one end of the linkage frame 46. The other end of the linkage frame 46 is connected to one of the clamping arms 42. A connecting frame 48 is connected to one side of the linkage frame 46, and one end of the connecting frame 48 is connected to another clamping arm 42. When the wire feeding component 33 is braked, the output end of the hydraulic cylinder 47 descends, causing one end of the linkage frame 46 to descend. At this time, under the action of the positioning frame 45, the other end of the linkage frame 46 will rise. When this end of the linkage frame 46 rises, it will cause the two clamping arms 42 to clamp the brake wheel 39. When the wire feeding component 33 is released, the output end of the hydraulic cylinder 47 rises, causing one end of the linkage frame 46 to rise. At this time, the other end will descend, and the descending end will cause the two clamping arms 42 to release the brake wheel 39. It should be noted that one end of the clamping arm 42 is hinged to the mounting base 41, and the other end is connected to one end of the linkage frame 46. Therefore, when one end of the linkage frame 46 is raised or lowered, it will drive the top ends of the two clamping arms 42 to move, thereby achieving the clamping and releasing of the brake wheel 39.

[0034] When using this invention: First, during operation, the shipbuilding gantry crane lifts the object to be transported via the lifting assembly 2. Specifically, the wire-laying assembly 33 can raise and lower the hook 36 and the object being lifted. Simultaneously, the traveling vehicle 3 moves the object being lifted. It is particularly important to note that a pin-type load cell is installed at the center pin position of the wire guide drum 35 in the wire-laying assembly 33. The wire rope passes around the wire guide drum 35 and connects to the hook 36 to achieve the lifting operation. During lifting, the load is transmitted to the wire guide drum 35 via the wire rope, and the pin-type load cell collects the shear and tensile force signals borne by the shaft in real time. The collected tension signal is converted into an electrical signal and sent to the control unit. The control unit converts the collected tension signal into the actual lifting weight according to the preset pulley ratio calibration parameters, so as to achieve accurate monitoring of the lifting weight. More specifically, the moving speed of the traveling vehicle 3 will be adjusted appropriately according to the weight of the object being lifted. When the control unit detects that the actual lifting weight exceeds the rated threshold, it immediately triggers the lifting weight limit protection logic, which links the braking of the traveling vehicle 3, the pressing plate 14 pressing against the inner wall of the track, the stopping of the wire release component 33, and the locking component 40 locking the wire rope to prevent overload operation from causing safety hazards. Secondly, when the traveling vehicle 3 brakes, the oil pipe 28 replenishes oil into the oil chamber 5. At this time, the oil injected into the oil chamber 5 pushes the pressure shaft 13 outward, causing the pressure shaft 13 to pull several movable ring plates 7 to move, and driving the pressure plate 14 to move outward to press against the inside of the traveling track of the traveling vehicle 3. This, in conjunction with the braking of the traveling vehicle 3 itself, brakes the shipbuilding gantry crane limiting mechanism. This solves the problem that traditional shipbuilding gantry crane limiting mechanisms rely solely on the adhesion friction between the traveling wheels and the track to achieve braking in high salt spray environments at sea, which easily leads to braking slippage and runaway. This is beneficial to improving the efficiency of shipbuilding gantry crane braking. The stability of the ship gate crane limiting mechanism in the high salt spray environment at the seaside; it should be further explained that when the top pressure plate 14 and the top pressure shaft 13 move outward, the movable ring plate 7 will also move, causing one end of several elastic spokes 1 8 and elastic spokes 2 10 located between the positioning ring plate 6 and the movable ring plate 7 to move and deform and elongate. Specifically, when the movable ring plate 7 moves, it will move away from the positioning ring plate 6, causing one end of elastic spokes 1 8 to move in the sliding groove 1 9, while elastic spokes 1 8 deforms and elongates. One end of elastic spokes 2 10 moves in the sliding groove 2 11, while elastic spokes 2 10 deforms and elongates. Then, when the traveling vehicle 3 moves in the traveling track on the gantry crane body 1, the traveling vehicle 3 is in a non-stop state. At this time, the oil distribution pipe 28 transfers the oil in the oil chamber 5 to the oil passage 17, so that the oil in the oil passage 17 pushes the desalination component 16 out and lowers. At the same time, the elastic spoke 1 8 and the elastic spoke 2 10 will be reset due to the properties of their materials, thereby driving the movable ring plate 7, the top pressure shaft 13, and the top pressure plate 14 to reset. Specifically, the oil in the oil passage 17 pushes the lifting shaft 18 down, so that the desalination component 16 extends out of the receiving groove 15 until it is in contact with the traveling track. With the bottom surface in contact, the desalination component 16 will desalinate the inner wall of the travel track during the movement of the vehicle body 3; of course, one end of the oil distribution pipe 28 is connected to the oil storage tank, that is, under normal conditions, the oil only flows in the oil cavity 5 and the oil passage 17. That is, when the vehicle body 3 brakes and stops, the top pressure plate 14 works and the desalination component 16 retracts into the storage tank 15. However, in case of emergency, the oil distribution pipe 28 can directly inject new oil into the oil cavity 5 to achieve emergency auxiliary braking, avoid oil circuit switching delay, and thus ensure safety in emergency situations. Furthermore, when the desalination unit 16 is working, the lifting shaft 18 drives the float 19, support frame 22, and other components to descend. When the lower wiping roller 24 contacts the inner bottom surface of the travel track, the float 19 can still move downwards. It is important to note that at this time, only the lifting shaft 18 and the float 19 descend; the other components remain in place and fixed. The descent of the float 19 will drive the guide member 20 to descend, while the driven member 21 at one end of the support frame 22 is fixed. Therefore, when the guide member 20 descends, it will drive the driven member 21 to move to both sides along the guiding direction of the guide member 20, thereby driving the two side wiping rollers 23 to move to both sides and contact the two sides of the travel track. At this point, the lower wiping roller 24 remains in contact with the inner bottom surface of the travel track, and the two side wiping rollers... The two side wiping rollers 23 maintain contact with the two inner sides of the travel track. When the travel vehicle body 3 moves, the lower wiping roller 24 rolls against the inner bottom surface of the travel track, and the two side wiping rollers 23 roll against the inner sides of the travel track. By utilizing the wear-resistant scraping layer on the outer periphery of the roller and the rolling and scraping action of the roller against the inner wall of the track, the salt crystals, floating salt rust, mud and sand debris attached to the inner side and inner bottom surface of the travel track are crushed, peeled off and cleaned away from the track working surface. Through the simultaneous follow-up cleaning of the two sides and the bottom surface, the real-time desalination operation of the inner side of the track is achieved without dead corners, effectively preventing the accumulation and hardening of salt scale from causing braking slippage, track corrosion and mechanism jamming. Moreover, the rolling friction cleaning method is adopted without hard rigid scraping, avoiding damage to the track body, and the structure runs smoothly without jamming. In addition, when desalting the running track, the side wiping roller 23 and the lower wiping roller 24 roll along the inner wall of the running track to crush, scrape and peel off the salt crystals, hardened salt scale, floating salt and rust residue attached to the inner side and bottom of the track. Then, several suction heads 30 on one side use negative pressure adsorption to uniformly absorb the salt particles, salt powder and impurities that have been cleaned by the wiping rollers, and then transport them through the extraction pipe 29 to the temporary storage tank 31 for centralized storage. Finally, when braking the wire-laying component 33, the output end of the hydraulic cylinder 47 descends, causing one end of the linkage frame 46 to descend. At this time, under the action of the positioning frame 45, the other end of the linkage frame 46 will rise. When this end of the linkage frame 46 rises, it will cause the two clamping arms 42 to clamp the brake wheel 39. When the wire-laying component 33 is released, the output end of the hydraulic cylinder 47 rises, causing one end of the linkage frame 46 to rise. At this time, the other end will descend, and the descending end will cause the two clamping arms 42 to release the brake wheel 39. It should be noted that one end of the clamping arm 42 is hinged on the mounting base 41, and the other end is connected to one end of the linkage frame 46. Therefore, when one end of the linkage frame 46 is raised or lowered, it will cause the top ends of the two clamping arms 42 to move, thereby realizing the clamping and releasing of the brake wheel 39.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shipbuilding gantry crane lifting capacity limiting mechanism, comprising a gantry crane body (1) and a lifting assembly (2) mounted on the gantry crane body (1), characterized in that: The lifting assembly (2) includes a traveling vehicle body (3) and a wire laying component (33). A clamping component (40) is connected to the traveling vehicle body (3). Limit seats (4) are connected to both sides of the traveling vehicle body (3). Each of the limit seats (4) has an oil cavity (5). The oil cavity (5) is provided with a number of positioning ring plates (6) and a number of movable ring plates (7). The outside of one of the positioning ring plates (6) is fixedly connected to the oil cavity (5). Several of the movable ring plates (7) are connected to the oil cavity (5). One side of some of the positioning ring plates (6) is connected to one side of the movable ring plates (7). The positioning ring plate (6) is connected to a number of elastic spokes (8) on one side. The movable ring plate (7) is provided with a number of sliding grooves (9). The other end of the elastic spokes (8) is connected to the sliding groove (9). The positioning ring plate (6) is provided with a number of sliding grooves (11) on one side. The movable ring plate (7) is connected to a number of elastic spokes (10). The other end of the elastic spokes (10) is connected to the sliding groove (11). The number of elastic spokes (8) and the number of elastic spokes (10) are alternately distributed.

2. The shipbuilding gantry crane lifting capacity limiting mechanism according to claim 1, characterized in that: Several positioning ring plates (6) and several movable ring plates (7) are provided with several oil discharge holes (12). One side of one of the movable ring plates (7) is connected to a top pressure shaft (13). The top pressure shaft (13) is set in the oil cavity (5). One end of the top pressure shaft (13) is connected to a top pressure plate (14).

3. The shipbuilding gantry crane lifting capacity limiting mechanism according to claim 1, characterized in that: Two storage slots (15) are provided on one side of the limiting seat (4). Each of the storage slots (15) is provided with a desalination component (16). The desalination component (16) includes a lifting shaft (18). Two oil passages (17) are provided in the limiting seat (4). The lifting shaft (18) is installed in the oil passages (17). One end of the lifting shaft (18) is connected to a float plate (19). The float plate (19) is provided in the storage slot (15).

4. The shipbuilding gantry crane lifting weight limiting mechanism according to claim 3, characterized in that: The top of the float (19) is connected to a guide (20), and the bottom of the float (19) is connected to a support (22). A follower (21) is connected to one side of the support (22). The follower (21) is slidably connected in the guide (20). When the float (19) drives the guide (20) to float downward, the follower (21) will move in the guide (20).

5. The shipbuilding gantry crane lifting weight limiting mechanism according to claim 4, characterized in that: The support frame (22) is externally connected to two side wiping rollers (23) and two lower wiping rollers (24). Each side of the side wiping rollers (23) and the lower wiping rollers (24) is provided with several floating grooves (25). Each floating groove (25) is provided with a return spring (26) and an alternating wiping shaft (27). The two ends of the alternating wiping shaft (27) are respectively connected to one end of the return spring (26), and the two ends of the alternating wiping shaft (27) move axially in the floating grooves (25).

6. The shipbuilding gantry crane lifting weight limiting mechanism according to claim 3, characterized in that: The limiting seat (4) is connected to an oil distribution pipe (28), which is connected to the oil cavity (5) and two oil passages (17) respectively. The other end of the oil distribution pipe (28) is connected to the oil storage tank. The oil distribution pipe (28) controls the movement of the oil body in the oil cavity (5) and the two oil passages (17).

7. The shipbuilding gantry crane lifting weight limiting mechanism according to claim 3, characterized in that: The float (19) is connected to an extraction tube (29), and the extraction tube (29) is connected to several suction heads (30). The limiting seat (4) is provided with a temporary storage slot (31). One end of the extraction tube (29) is placed in the temporary storage slot (31), and one side of the temporary storage slot (31) is connected to an opening and closing plate (32).

8. The shipbuilding gantry crane lifting weight limiting mechanism according to claim 1, characterized in that: The wire feeding component (33) includes a wire drum (35) and two reels (34). The wire drum (35) is connected to a hook (36) by a wire rope. The traveling trolley is equipped with two motors (38) and two transmission boxes (37). The output end of the motor (38) is connected to a drive shaft, which is connected to the transmission box (37). One end of the reel (34) is connected to the transmission box (37), and one end of the drive shaft is connected to a brake wheel (39).

9. The shipbuilding gantry crane lifting weight limiting mechanism according to claim 8, characterized in that: The clamping component (40) includes a mounting base (41) which is mounted on a traveling trolley. Two clamping arms (42) are connected to the mounting base (41). A clamping member (43) is connected to one side of each of the two clamping arms (42). A salt scraping plate (44) is provided on both sides of the clamping member (43).

10. The shipbuilding gantry crane lifting weight limiting mechanism according to claim 9, characterized in that: A positioning frame (45) is connected to the mounting base (41), and a linkage frame (46) is rotatably connected to the positioning frame (45). A hydraulic cylinder (47) is connected to one side of the mounting base (41), and the output end of the hydraulic cylinder (47) is connected to one end of the linkage frame (46). The other end of the linkage frame (46) is connected to one of the clamping arms (42). A connecting frame (48) is connected to one side of the linkage frame (46), and one end of the connecting frame (48) is connected to another clamping arm (42).

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