Portal double-beam crane with cable stabilization function

Abstract

The application relates to the technical field of portal double-beam cranes, in particular to a portal double-beam crane with cable stability function, which comprises a double main beam, a hoist trolley, a pulley block, a winch drum, a lifting hook, a portal support leg and a cable, the bottom surface of the hoist trolley is fixedly connected with an upper protective shell through bolts, the bottom of the upper protective shell is provided with a lower protective shell, the upper surface of the upper protective shell and the upper surface of the lower protective shell are both provided with two through holes matched with the cable, the upper protective shell and the lower protective shell are matched and arranged below the hoist trolley, a roller clamping assembly with a compression spring and a damper is symmetrically arranged in the through hole, the roller is always elastically attached to the outer wall of the cable, the compression spring cooperates with the damper to buffer the lateral impact force caused by the swing of the cable, the cable can be synchronously moved to be limited and constrained in the whole process, the cable can be prevented from repeatedly scratching the main beam and the pulley to cause the wear and breakage of the outer steel wires, the service life of the cable is effectively prolonged, and the operation and maintenance cost of the equipment for daily replacement of the cable is reduced.

Description

Technical Field

[0001] This invention relates to the field of gantry double girder crane technology, and specifically to a gantry double girder crane with cable stabilization function. Background Technology

[0002] Gantry double girder cranes are large-scale gantry lifting equipment. The main body consists of two sets of parallel main beams, rigid outriggers on both sides, a bottom traveling trolley mechanism, and a lifting trolley carrying a hoist. The main beams are supported at both ends by outriggers, forming a gantry-shaped frame structure. It can move longitudinally along ground tracks, while the lifting trolley can move laterally back and forth between the two main beams. Working in conjunction with the hoisting cable, it achieves lifting, lowering, and transfer operations of heavy objects. This equipment has a strong load-bearing capacity and a wide operating range, and is widely used in heavy-duty operation scenarios such as port cargo yards, steel storage facilities, heavy industrial assembly plants, and precast component storage yards. It is a core piece of equipment for heavy material handling. During lifting operations, the hoisting of heavy objects relies entirely on the load-bearing cable wound and released by the hoisting mechanism. The cable directly bears the entire load of the object, and its operational stability directly determines the overall operational safety and lifting accuracy. Therefore, the cable's guiding, limiting, and anti-sway restraint structures are key supporting components of gantry double girder cranes.

[0003] Existing conventional gantry double-girder cranes only have simple rope guides at the trolley drum position to limit the winding of the cable, without a supporting full-range stabilizing constraint structure. When the crane trolley moves longitudinally, moves laterally, or the lifted load is subjected to outdoor crosswinds or ground inertial impacts during start-up and shutdown, the suspended cable section has no lateral limiting support, making it prone to large-scale left-right and back-and-forth swinging. The swaying cable repeatedly scrapes and rubs against the trolley pulleys and the edge of the main beam, accelerating the wear and breakage of the outer steel wire of the cable, significantly shortening the cable replacement cycle, and increasing equipment operation and maintenance costs. Secondly, the swinging cable causes the load below to deviate from the predetermined lifting point, making it impossible to accurately align and stack materials, reducing the efficiency of lifting operations in the plant area. Finally, the large swinging load will generate lateral pulling force transmitted to the drum and rope guide, which can easily cause deformation of the rope guide and uneven wear of the drum rope groove. In severe cases, cable derailment and rope tangling may occur, and in extreme working conditions, there is a major safety hazard of cable breakage and falling objects. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a gantry double girder crane with cable stabilization function to solve the above problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gantry double-girder crane with cable stabilization function, comprising double main beams, a lifting trolley, a pulley block, a winch drum, a hook, gantry legs, and a cable. The bottom surface of the lifting trolley is fixedly connected to an upper protective shell by bolts. A lower protective shell is provided at the bottom of the upper protective shell. The upper surface of both the upper and lower protective shells has two through-holes adapted to the cable. The inner wall of the groove of each through-hole is symmetrically fixedly connected to two mounting plates with the cable as the center. Each mounting plate has multiple rollers on the side near the cable. Each roller has an adjusting plate at both ends. The surface of each adjusting plate has two symmetrical sliding openings. The outer surface of each adjusting plate has an adjusting opening on one side of each sliding opening. Each mounting plate has multiple semi-threaded rods, multiple compression springs, multiple dampers, and multiple threaded adjusting caps on the side near the cable.

[0006] Preferably, the extension path of each through-hole is adapted to the cable routing, the outer surface of each roller is in contact with the outer surface of the cable, and every two rollers are symmetrically distributed on both sides of the cable.

[0007] Preferably, an assembly shell is fixedly connected to the inner wall of each pair of adjusting plates on one side, a ball bearing is fixedly connected to the inner wall of each assembly shell, and the two end surfaces of each roller are fixedly connected to the inner ring of the ball bearing.

[0008] Preferably, the interior of each sliding port is connected to the interior of the adjusting port, each sliding port and the adjusting port are arranged in a stepped manner, the diameter of each sliding port is smaller than the diameter of the adjusting port, and each adjusting port is located on the side closer to the cable.

[0009] Preferably, the threaded end of each of the semi-threaded rods passes through the sliding port and extends into the interior of the adjusting port, the outer surface of each of the semi-threaded rods is slidably connected to the interior of the sliding port, the outer threaded surface of each of the semi-threaded rods is threadedly connected to the inner wall of the thread adjusting cap, and the outer surface of each of the thread adjusting caps is located inside the adjusting port.

[0010] Preferably, each of the adjusting plates has four compression springs on one side near the mounting plate, and the two ends of each damper are embedded in the inner walls of the two ends of the compression spring. Each damper is located inside the compression spring.

[0011] Preferably, both the upper protective shell and the lower protective shell have inspection ports on their sides, and each inspection port has a sealing plate that is compatible with the through port. The inner walls of the sides of the upper and lower protective shells are threadedly connected to the inner walls of the corresponding sealing plates with fixing bolts.

[0012] Preferably, the inner wall of each through-hole and the inner wall of the sealing plate are provided with an adjustment groove corresponding to each adjustment plate, and a movable sliding plate adapted to each adjustment groove is fixedly connected to one side of each adjustment plate, and the outer surface of each movable sliding plate is slidably connected to the inside of the adjustment groove.

[0013] Preferably, the bottom ends of the double main beams are fixedly connected to the top ends of the portal legs, the traveling end of the hoisting trolley is slidably connected to the inner side of the track of the double main beams, the connecting end of the winch drum is rotatably connected to the inner wall of the hoisting trolley and is located above the upper protective shell, one end of the cable is wound around the outer surface of the winch drum, and the other end of the cable passes downward through the through-hole inside the upper protective shell and the through-hole inside the lower protective shell, and is wound around and fitted with the pulley block, and the hook is fixedly connected to the bottom end of the pulley block.

[0014] Preferably, an auxiliary handle is fixedly connected to one side of each of the sealing plates, and multiple assembly rods are fixedly connected to the adjacent sides of the upper and lower protective shells.

[0015] The beneficial effects of this invention are as follows: 1. By installing upper and lower protective shells under the crane trolley, and symmetrically arranging roller clamping components with compression springs and dampers in the through-hole of the two protective shells, the rollers always elastically fit against the outer wall of the cable. The compression springs and dampers can buffer the lateral impact force caused by the swing of the cable. They can move synchronously with the crane trolley and limit the suspension cable throughout the entire process. Compared with the existing structure that only has a simple rope guide at the drum, it can suppress the large swing of the cable caused by the movement of the crane, the displacement of the trolley and the crosswind, and prevent the cable from repeatedly scraping against the main beam and pulley, causing wear and breakage of the outer steel wire, effectively extending the service life of the cable and reducing the maintenance cost of daily cable replacement.

[0016] 2. The cable is clamped bidirectionally by elastic rollers symmetrically distributed inside the through-hole, continuously limiting the lateral movement of the cable bundle that spreads out in a cone shape from top to bottom. This significantly reduces the offset and swaying caused by the cable driving the hook and the heavy object. During operation, the heavy object can be stably kept on the vertical lifting trajectory, accurately aligning with the material stacking and assembly points. This solves the problem of difficulty in aligning heavy objects due to swaying in traditional cranes, and directly improves the efficiency of lifting, transportation, and component assembly in the factory area.

[0017] 3. The roller assembly inside the upper and lower double-layer protective shell continuously constrains the lateral displacement of the cable, eliminating the continuous lateral pulling force generated by the large swing of the cable on the winch drum and simple rope guide, preventing uneven wear of the drum rope groove and deformation and failure of the rope guide, avoiding cable derailment and rope jamming failure, and at the same time, the damper can absorb the swaying impact, reducing the risk of cable breakage and falling objects under extreme wind and sudden start and stop conditions, thus improving the overall lifting safety of the gantry double girder crane from the structural level. Attached Figure Description

[0018] Figure 1 This is a three-dimensional overall structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the sealing plate of the present invention; Figure 3 This is a three-dimensional cross-sectional view of the protective shell of the present invention; Figure 4 This is a three-dimensional structural diagram of the mounting plate of the present invention; Figure 5 This is a three-dimensional structural diagram of the roller of the present invention; Figure 6 This is a three-dimensional structural diagram of the adjusting plate of the present invention; Figure 7 This is a three-dimensional structural diagram of the compression spring of the present invention.

[0019] In the attached diagram: 1. Double main beam; 2. Lifting trolley; 3. Pulley block; 4. Sealing plate; 5. Lower protective shell; 6. Auxiliary handle; 7. Upper protective shell; 8. Winch drum; 9. Inspection port; 10. Assembly rod; 11. Through port; 12. Cable; 13. Mounting plate; 15. Adjustment groove; 16. Fixing bolt; 18. Moving slide plate; 19. Roller; 20. Threaded adjustment cap; 21. Adjustment plate; 22. Semi-threaded rod; 23. Adjustment port; 24. Sliding port; 25. Compression spring; 26. Damper; 27. Ball bearing; 28. Assembly shell; 29. ​​Hook; 30. Gantry outrigger. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0021] Example: Please see Figures 1 to 7A gantry crane with cable stabilization function includes a double main beam 1, a lifting trolley 2, a pulley block 3, a winch drum 8, a hook 29, gantry legs 30, and a cable 12. An upper protective shell 7 is bolted to the bottom of the lifting trolley 2. A lower protective shell 5 is located at the bottom of the upper protective shell 7. Both the upper surface of the upper protective shell 7 and the upper surface of the lower protective shell 5 have two through-holes 11 adapted to the cable 12. The inner wall of the groove of each through-hole 11 is symmetrically fixed with two cables centered on the cable 12. Each mounting plate 13 has multiple rollers 19 on the side near the cable 12. Each roller 19 has an adjusting plate 21 at both ends. Each adjusting plate 21 has two symmetrical sliding openings 24 on its surface. Each adjusting plate 21 has an adjusting opening 23 on the outer surface of its outer surface on one side of each sliding opening 24. Each mounting plate 13 has multiple semi-threaded rods 22, multiple compression springs 25, multiple dampers 26 and multiple threaded adjusting caps 20 on the side near the cable 12. Each pair of adjusting plates 21 has an assembly shell 28 fixedly connected to the inner wall of one side of each pair of adjusting plates 21. Each assembly shell 28 has a ball bearing 27 fixedly connected to the inner wall of each assembly shell 28. The two ends of each roller 19 are fixedly connected to the inner ring of the ball bearing 27. The threaded end of each semi-threaded rod 22 passes through the sliding port 24 and extends into the interior of the adjusting port 23. The outer surface of each semi-threaded rod 22 is slidably connected to the interior of the sliding port 24. The outer threaded surface of each semi-threaded rod 22 is threadedly connected to the inner wall of the thread adjusting cap 20. The outer surface of each thread adjusting cap 20 is located inside the adjusting port 23. Each adjusting plate 21 has one side near the mounting plate 13 that corresponds to four compression springs 25. Both ends of each damper 26 are embedded in the inner walls of both ends of the compression spring 25. Each damper 26 is located inside the compression spring 25. The bottom ends of the double main beam 1 are fixedly connected to the top of the portal leg 30. The traveling end of the hoisting trolley 2 is slidably connected to the inner side of the track of the double main beam 1. The connecting end of the winch drum 8 is rotatably connected to the inner wall of the hoisting trolley 2 and is located above the upper protective shell 7. One end of the cable 12 is wound around the outer surface of the winch drum 8, and the other end of the cable 12 passes downward through the through-hole 11 inside the upper protective shell 7 and the through-hole 11 inside the lower protective shell 5, and is wound around and matched with the pulley block 3. The hook 29 is fixedly connected to the bottom end of the pulley block 3.

[0022] Working principle: The bottom of the lifting trolley 2 is fixedly connected to the upper protective shell 7 by bolts. The bottom of the upper protective shell 7 is spliced ​​and fixed to the lower protective shell 5 by the assembly rod 10. The two can also be assembled by existing connection methods such as welding and snap-fit. The double shell layer arrangement can play a role in dustproof and impact protection for the internal cable 12 constraint component, avoiding the problem of jamming and failure of the roller 19 due to bumping and clamping of the factory area debris. Two sets of through openings 11 are opened on the top surface of the upper protective shell 7 and the top surface of the lower protective shell 5. The trajectory of the through openings 11 is completely matched with the vertical direction of the cable 12, allowing multiple cables 12 to pass through vertically at the same time. The outline of the through openings 11 can be rectangular or elliptical to accommodate different numbers and diameters of tapered cable bundles 12, thus initially limiting the upper section of the cable 12 and reducing the initial swing amplitude of the cable 12. Two mounting plates 13 are symmetrically welded to the inner wall of each through-hole 11 groove, with the central axis of the cable 12 as the center. Welding can be replaced by bolt locking or riveting. The symmetrical layout ensures that the clamping force on both sides is balanced, avoiding unilateral wear caused by squeezing the cable 12 on one side. Each mounting plate 13 is equipped with multiple sets of rollers 19 on the side facing the cable 12. The two ends of the rollers 19 are rotatably connected to the shaft of the adjusting plate 21 through the mounting shell 28 and the ball bearing 27. The ball bearing 27 reduces the rolling friction resistance of the rollers 19. When the cable 12 is raised or lowered, the rollers 19 rotate synchronously with the cable 12, preventing hard friction from scratching the outer steel wire of the cable 12. Two sets of symmetrical sliding openings 24 are opened on the surface of the adjusting plate 21. The side of the sliding opening 24 is connected to the stepped adjusting opening 23. The semi-threaded rod 22 passes through the sliding opening 24 and extends into the interior of the adjusting opening 23. The rod body of the semi-threaded rod 22 is in sliding fit with the inner wall of the sliding opening 24. The threaded section of the rod body is in threaded locking fit with the threaded adjusting cap 20. Rotating the threaded adjusting cap 20 can change the lateral distance between the adjusting plate 21 and the mounting plate 13 to accommodate cables 12 of different thicknesses. Four compression springs 25 are arranged between the adjusting plate 21 and each mounting plate 13. The damper 26 is coaxially nested in the inner cavity of the compression spring 25. The two ends of the damper 26 are embedded in the inner walls of the two ends of the compression spring 25. The compression spring 25 continuously pushes the adjusting plate 21 outward, so that the rollers 19 on both sides are always in close contact with the outer wall of the cable 12. The damper 26 absorbs the impact vibration generated by the left and right swaying of the cable 12 and suppresses large swing. The bottom ends of the double main beam 1 are fully welded to the top of the portal leg 30, or flange bolts can be used for fixing. The traveling wheels of the trolley 2 are slidably connected to the track of the double main beam 1. The shaft of the winch drum 8 is rotatably installed in the inner cavity of the trolley 2 and located above the upper protective shell 7. One end of the cable 12 is wound in multiple layers on the surface of the winch drum 8, and the other end passes vertically through the through-hole 11 of the two protective shells and is connected to the pulley block 3. The bottom end of the pulley block 3 is welded to fix the hook 29. It should be noted that pulley block 3 is a conventional moving pulley load-bearing component in this field, used to amplify and lift the load, and hook 29 is a standard lifting tool used to hang and lift heavy objects; The entire assembly is installed below the trolley 2 of the gantry double girder crane. It moves laterally along the double main beam 1 synchronously with the trolley 2, without interfering with the winding and unwinding of the cable 12 of the winch drum 8 or the lifting and lowering of the hook 29. The cable 12 can be restrained throughout the entire process under the action of crosswinds, trolley movement, and crosswinds, reducing problems such as cable 12 scratching and wear, load displacement, and damage to the drum due to lateral tension.

[0023] Please see Figure 3 and Figure 6 The extension path of each through-hole 11 is adapted to the routing of the cable 12, the outer surface of each roller 19 is in contact with the outer surface of the cable 12, and every two rollers 19 are symmetrically distributed on both sides of the cable 12. The interior of each sliding port 24 is connected to the interior of the adjusting port 23. Each sliding port 24 and the adjusting port 23 are arranged in a stepped manner. The diameter of each sliding port 24 is smaller than the diameter of the adjusting port 23. Each adjusting port 23 is located on the side closer to the cable 12.

[0024] Working principle: The overall extension direction of the through-hole 11 is perfectly matched with the vertical routing of the cable 12. The cable 12 travels in a cone shape from top to bottom, perfectly fitting the internal space of the through-hole 11. There will be no situation where the cable 12 gets stuck or scrapes the edge of the through-hole 11. The inner diameter of the through-hole 11 can be widened according to the maximum spread width of the cable 12 bundle to adapt to the working conditions of multiple cables 12 with multiple ratios. The two rollers 19 are arranged symmetrically on the left and right sides of the center line of the cable 12. The outer arc surface of the roller 19 is completely in contact with the outer surface of the cable 12. The contact form is line contact. A rubber coating can also be added to the surface of the roller 19 to achieve flexible contact and further reduce the extrusion and wear of the cable 12. The sliding port 24 and the adjustment port 23 on the adjustment plate 21 are internally connected and arranged in a stepped manner. The diameter of the sliding port 24 is smaller than that of the adjustment port 23. The adjustment port 23 is arranged on the side closer to the cable 12. This stepped structure can limit the threaded adjustment cap 20, prevent the adjustment cap from falling out of the sliding port 24, and ensure the stability of the adjustment structure. With the help of the semi-threaded rod 22, the threaded adjusting cap 20 and the compression spring 25, when the threaded adjusting cap 20 is loosened, the adjusting plate 21 can slide laterally along the semi-threaded rod 22 to adjust the clamping distance between the two rollers 19, adapt to different thicknesses of cables 12, and lock the threaded adjusting cap 20 to fix the clamping width. It should be noted that the alternative to the stepped opening structure can be a countersunk hole integrated opening, which can also achieve the function of a limit adjustment cap. During operation, the winch drum 8 winds up and unwinds the cable 12. As the cable 12 moves up and down, it remains in contact with the rollers 19 on both sides. The rollers 19 rely on the rotation of the ball bearings 27 to reduce friction, and the compression spring 25 continuously provides clamping force. Even if the cable 12 bundle spreads out downwards and widens, the adjusting plate 21 automatically moves outwards to compensate for the gap, limiting the lateral deviation of the cable 12 throughout the entire process and reducing the swaying amplitude of the hoisted heavy object.

[0025] Please see Figure 2 Inspection ports 9 are provided on the sides of the upper protective shell 7 and the lower protective shell 5. Each inspection port 9 has a sealing plate 4 that is compatible with the through port 11. The inner walls of the sides of the upper protective shell 7 and the lower protective shell 5 are threadedly connected to the inner walls of the corresponding sealing plates 4 with fixing bolts 16.

[0026] Working principle: Rectangular inspection ports 9 are opened on the sides of the upper protective shell 7 and the lower protective shell 5. The sealing plate 4 is assembled inside the inspection port 9 with clearance sliding fit. The outline of the sealing plate 4 is adapted to the outer outline of the through port 11. The sealing plate 4 can be horizontally pulled and disassembled along the inspection port 9. The shape of the inspection port 9 can also be designed as round or square to adapt to different maintenance operation spaces. The inner walls of the upper protective shell 7 and the inner walls of the lower protective shell 5 are provided with corresponding threaded holes and the inner walls of the sealing plate 4. The sealing plate 4 is fixed by multiple fixing bolts with 16 threads. The locking method can be replaced by snap-locking or magnetic adsorption. No additional tools are required for disassembly and assembly. It should be noted that the inspection port 9 is used for later maintenance of roller 19, adjustment of spring preload, and replacement of worn roller 19, without the need to completely disassemble the upper protective shell 7 and the lower protective shell 5, thus reducing the workload of maintenance. When the internal clamping components need to be inspected, unscrew the fixing bolt 16, pull out the sealing plate 4, and you can directly operate the adjusting plate 21, threaded adjusting cap 20, and roller 19. After the inspection is completed, push the sealing plate 4 back in and lock the fixing bolt 16 to restore the sealing protection. This will not affect the normal movement of the crane trolley 2 or the lifting operation of the cable 12.

[0027] Please see Figure 4 Each through-hole 11 and the inner wall of the sealing plate 4 are provided with an adjustment groove 15 corresponding to each adjustment plate 21. Each adjustment plate 21 has a movable slide plate 18 that is adapted to each adjustment groove 15 fixedly connected to one side. The outer surface of each movable slide plate 18 is slidably connected to the inside of the adjustment groove 15.

[0028] Working principle: Long strip-shaped adjustment grooves 15 are opened simultaneously on the inner wall of the through port 11 and the inner wall of the sealing plate 4. The adjustment grooves 15 are arranged horizontally and correspond one-to-one with the adjustment plates 21. The adjustment grooves 15 can be opened with two structures: through grooves and semi-closed grooves. Each adjusting plate 21 has a movable sliding plate 18 welded and fixed on its side. The outer contour of the movable sliding plate 18 slides with the inner cavity of the adjusting groove 15. The sliding connection can be replaced by a sliding groove slider and a guide rail sliding fit. The movable sliding plate 18 slides laterally in sync with the adjusting plate 21. With the combination of the sealing plate 4 pull-out structure and the compression spring 25 elastic push structure, when the cable 12 spreads downward and drives the roller 19 and the adjusting plate 21 to expand outward, the moving slide plate 18 slides synchronously along the inside of the adjusting groove 15. The adjusting groove 15 limits the maximum outward stroke of the adjusting plate 21 to prevent the roller 19 from detaching from the cable 12 and losing its limit constraint. It should be noted that the movable slide plate 18 and the adjustment groove 15 work together to guide and limit the movement, preventing the adjustment plate 21 from shifting up or down or tilting, and ensuring that the rollers 19 on both sides always hold the cable 12 horizontally and symmetrically. When the hoisting operation is subjected to crosswinds and the impact of start-stop inertia, the adjusting plate 21 slides back and forth slightly, and the moving slide plate 18 slides smoothly in the adjusting groove 15. In conjunction with the damper 26, the vibration is absorbed, and the roller 19 is kept in contact with the cable 12, which stably restrains the lateral swing of the cable 12.

[0029] Please see Figure 4 Each sealing plate 4 has an auxiliary handle 6 fixedly connected to one side, and multiple assembly rods 10 are fixedly connected to the adjacent sides of the upper protective shell 7 and the lower protective shell 5.

[0030] Working principle: An auxiliary handle 6 is welded and fixed to the outer side of each sealing plate 4. The auxiliary handle 6 can be either a circular handle or a straight handle, which makes it convenient for operators to hold and pull the sealing plate 4 and open the inspection port 9 without prying the housing. Between the mating end faces of the upper protective shell 7 and the lower protective shell 5, multiple columnar assembly rods 10 are welded and fixed to the two shell plates at both ends. The assembly rods 10 play a supporting and positioning connection role. The two shells can also be mated and fixed by flanges and column bolts. The assembly rod 10 supports and separates the upper protective shell 7 and the lower protective shell 5, leaving space for the middle section of the cable 12 to constrain it. At the same time, it improves the overall structural rigidity of the double shell, making the shell less prone to vibration and deformation when the crane trolley 2 moves at high speed, and preventing the internal rollers 19 from shifting. With the structure of movable slide plate 18, adjustment groove 15, and sealing plate 4, during routine maintenance of the equipment, the operator holds the auxiliary handle 6 to quickly pull out the sealing plate 4, and replaces and adjusts the roller 19, compression spring 25, and damper 26. After maintenance, the operator holds the auxiliary handle 6 to push the sealing plate 4 in, and the fixing bolt 16 is tightened. It should be noted that the assembly rod 10 is a hollow round rod structure, which can be used to run cables and lubrication pipes, making it suitable for the maintenance and upkeep needs of cranes in long-term open-air factory areas.

[0031] In summary, during operation, the hoisting drum 8 rotates to wind up and unwind the cable 12. The cable 12 passes through the through-holes 11 inside the upper protective shell 7 and lower protective shell 5 from the hoisting drum 8 downwards, then winds around the pulley block 3 and drives the bottom hook 29 to lift and lower to complete the lifting of heavy objects. During operation, when the crane trolley moves longitudinally along the ground track, the crane trolley 2 slides laterally along the double main beam 1, or when there is a lateral impact from outdoor crosswinds or starting / stopping inertia, the cable 12 tends to swing left and right. At this time, the compression spring 25 between the mounting plate 13 and the adjusting plate 21 continuously pushes the adjusting plate 21 outwards. The damper 26 nested inside the compression spring 25 absorbs the swaying impact synchronously, causing the adjusting plate to swing outwards. The roller 19, mounted on the 21 via the mounting shell 28 and ball bearing 27, always remains in contact with the outer wall of the cable 12. As the cable 12 moves up and down, the roller 19 rotates synchronously to reduce friction loss. Facing the cable 12 bundle that spreads outwards in a cone shape from top to bottom, the cable 12 pushes the roller 19 and the adjusting plate 21 apart. The sliding plate 18 on the side of the adjusting plate 21 slides smoothly outwards along the adjusting groove 15 opened in the through-hole 11 and the inner wall of the sealing plate 4. The stepped sliding openings 24 and 23, in conjunction with the semi-threaded rod 22 and threaded adjusting cap 20, limit the maximum expansion stroke of the adjusting plate 21, preventing the roller 19 from detaching from the cable 12 and losing its restraint. Simultaneously, the extension path of the through-hole 11 and the cable... Rope 12 is perfectly adapted to the cable, continuously limiting the upper section of rope 12, significantly reducing the swing amplitude of rope 12 and the hook 29 and heavy objects below, preventing rope 12 from rubbing against the main beam and pulleys, causing wire wear and breakage, and eliminating the lateral pulling force generated by the large swing of rope 12 on the winch drum 8, preventing drum groove wear, rope guide deformation, and rope 12 derailment, falling objects, and other malfunctions. During daily operation, the sealing plate 4 is locked inside the side inspection port 9 of the upper protective shell 7 and lower protective shell 5 by fixing bolts 16 to prevent dust and rainwater from entering the shell, and to prevent springs and bearings from rusting and jamming. When the equipment needs to be repaired, the roller 19 needs to be adjusted, the clamping distance needs to be adjusted, or worn parts need to be replaced, the operator... The operator unscrews the fixing bolt 16, holds the auxiliary handle 6 on the outside of the sealing plate 4 and pulls the sealing plate 4 outward. The internal adjustment components can then be operated directly to complete the maintenance. After the maintenance is completed, the sealing plate 4 is pushed back into the maintenance port 9 and the fixing bolt 16 is tightened to restore the sealing protection. The upper protective shell 7 and the lower protective shell 5 are supported and positioned by the assembly rod 10, which improves the overall rigidity of the double shell and reduces the clamping offset problem caused by shell vibration and deformation during the movement of the crane trolley 2. The whole machine moves synchronously with the crane trolley 2 along the double main beam 1. The entire process provides elastic limit buffering for the suspended conical cable 12 bundles, stabilizes the hoisting trajectory, reduces operation and maintenance costs, and improves the accuracy of hoisting operations in the plant area and the safety of the whole machine operation.

[0032] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A gantry crane with cable stabilization function, comprising a double main beam (1), a lifting trolley (2), a pulley block (3), a winch drum (8), a hook (29), gantry legs (30), and a cable (12), characterized in that: The bottom surface of the lifting trolley (2) is fixedly connected to an upper protective shell (7) by bolts. A lower protective shell (5) is provided at the bottom of the upper protective shell (7). Two through holes (11) adapted to the cable (12) are opened on the upper surface of the upper protective shell (7) and the upper surface of the lower protective shell (5). Two mounting plates (13) are symmetrically fixedly connected to the inner wall of the groove of each through hole (11) with the cable (12) as the center. Multiple rollers are provided on the side of each mounting plate (13) near the cable (12). (19) Each roller (19) is provided with an adjustment plate (21) at both ends. Each adjustment plate (21) has two symmetrical sliding openings (24) on its surface. Each adjustment plate (21) has an adjustment opening (23) on one side of each sliding opening (24) on its outer surface. Each mounting plate (13) is provided with a plurality of semi-threaded rods (22), a plurality of compression springs (25), a plurality of dampers (26) and a plurality of threaded adjustment caps (20) on the side of the mounting plate (13) near the cable (12).

2. A gantry double-girder crane with cable stabilization function according to claim 1, characterized in that: The extension path of each of the through-holes (11) is adapted to the routing of the cable (12), the outer surface of each of the rollers (19) is in contact with the outer surface of the cable (12), and each pair of rollers (19) are symmetrically distributed on both sides of the cable (12).

3. A gantry double-girder crane with cable stabilization function according to claim 1, characterized in that: Each pair of adjustment plates (21) has an assembly shell (28) fixedly connected to the inner wall of one side of each pair of adjustment plates (21), and a ball bearing (27) fixedly connected to the inner wall of each assembly shell (28). The two ends of each roller (19) are fixedly connected to the inner ring of the ball bearing (27).

4. A gantry double-girder crane with cable stabilization function according to claim 1, characterized in that: The interior of each sliding port (24) is connected to the interior of the adjusting port (23). Each sliding port (24) and the adjusting port (23) are arranged in a stepped manner. The diameter of each sliding port (24) is smaller than the diameter of the adjusting port (23). Each adjusting port (23) is located on the side closer to the cable (12).

5. A gantry double-girder crane with cable stabilization function according to claim 1, characterized in that: The threaded end of each of the semi-threaded rods (22) passes through the sliding port (24) and extends into the interior of the adjusting port (23). The outer surface of each of the semi-threaded rods (22) is slidably connected to the interior of the sliding port (24). The outer threaded surface of each of the semi-threaded rods (22) is threadedly connected to the inner wall of the thread adjusting cap (20). The outer surface of each of the thread adjusting caps (20) is located inside the adjusting port (23).

6. A gantry double-girder crane with cable stabilization function according to claim 1, characterized in that: Each of the adjustment plates (21) has one side near the mounting plate (13) corresponding to four compression springs (25), and the two ends of each damper (26) are embedded in the inner walls of the two ends of the compression springs (25), and each damper (26) is located inside the compression springs (25).

7. A gantry double-girder crane with cable stabilization function according to claim 1, characterized in that: Inspection ports (9) are provided on the side of the upper protective shell (7) and the side of the lower protective shell (5). Each inspection port (9) is slidably connected to a sealing plate (4) that is compatible with the through port (11). The inner wall of the side of the upper protective shell (7) and the inner wall of the side of the lower protective shell (5) are threadedly connected to the inner wall of the corresponding sealing plate (4) with fixing bolts (16).

8. A gantry double-girder crane with cable stabilization function according to claim 7, characterized in that: Each of the through-holes (11) and the inner wall of the sealing plate (4) are provided with adjustment grooves (15) corresponding to each adjustment plate (21). Each adjustment plate (21) has a movable sliding plate (18) that is adapted to each adjustment groove (15) fixedly connected to one side. The outer surface of each movable sliding plate (18) is slidably connected to the inside of the adjustment groove (15).

9. A gantry double-girder crane with cable stabilization function according to claim 1, characterized in that: The bottom ends of the double main beam (1) are fixedly connected to the top of the portal leg (30). The traveling end of the trolley (2) is slidably connected to the inner side of the track of the double main beam (1). The connecting end of the winch drum (8) is rotatably connected to the inner wall of the trolley (2) and located above the upper protective shell (7). One end of the cable (12) is wound around the outer surface of the winch drum (8). The other end of the cable (12) passes downward through the through-hole (11) inside the upper protective shell (7) and the through-hole (11) inside the lower protective shell (5), and is wound around the pulley block (3). The hook (29) is fixedly connected to the bottom end of the pulley block (3).

10. A gantry double-girder crane with cable stabilization function according to claim 7, characterized in that: Each of the sealing plates (4) has an auxiliary handle (6) fixedly connected to one side, and the upper protective shell (7) and the lower protective shell (5) have multiple assembly rods (10) fixedly connected to their adjacent sides.

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