Method for fine adjustment of a portal crane

Abstract

The application discloses a door type crane micro-motion adjusting method and belongs to the technical field of hoisting engineering, and comprises the following steps: a, X direction, a moving platform is arranged on a trolley frame, a moving device is arranged at the bottom of the moving platform, square steel rails for the moving device to slide are arranged on the upper portion of the trolley frame, the square steel rails are arranged along the direction of a cart walking mechanism, and a horizontal pushing hydraulic cylinder is arranged between the moving platform and the trolley frame; b, Y direction, two wheels driven by motors are arranged on the cart walking mechanism, and two micro-motion walking wheels are further arranged, the micro-motion walking wheels are driven by servo motors; and c, Z direction, a balance pulley is arranged on the moving platform, the balance pulley is driven by a vertical pushing cylinder, and the vertical pushing cylinder drives the balance pulley to move upwards or downwards. The application can realize high-precision micro-motion control in X, Y and Z directions and meet the requirement of accurate positioning.

Description

Technical Field

[0001] This invention relates to the field of hoisting engineering technology, and in particular to a method for fine-tuning a gantry crane. Background Technology

[0002] Currently, as my country's requirements for infrastructure development gradually increase, the demands on the lifting accuracy of gantry cranes are also rising. However, the positioning accuracy of conventional gantry cranes is only at the centimeter level, resulting in low lifting precision, which cannot meet the accuracy requirements for the assembly of modern precast pavement panels.

[0003] Chinese patent document CN204873572U, published on December 16, 2015, discloses a gantry crane with a balance beam, including a gantry frame. The gantry frame is characterized by: legs at the lower parts of both ends; a trolley traveling mechanism at the lower end of each leg; a crane trolley on the upper surface of the gantry frame; a balance beam connected to the crane trolley via wire ropes; a transversely arranged main pulley block at the center of the upper surface of the balance beam; balance pulleys on both sides of the main pulley block; and fixed... The track has horizontally positioned holes on its front and side sides. A main hook is positioned at the center of the lower surface of the balance beam. Adjustment seats are positioned at both ends of the balance beam. The end faces of the adjustment seats are hollow rectangular structures. Mounting grooves are provided on the upper part of both sides of the inner wall of the adjustment seat. Needle roller holders are installed in the mounting grooves. Needle rollers are connected between the needle roller holders. A fixing rod is positioned in the middle of the lower part of the front and rear sides of the adjustment seat. A fixing ring is provided at one end of the fixing rod. A spring is sleeved on the fixing rod. An anti-slip sleeve is provided at the other end of the fixing rod. An auxiliary hook is positioned at the center of the lower surface of the adjustment seat.

[0004] The gantry crane with a balance beam disclosed in this patent document has the advantages of simple structure, wide applicability, convenient use, and flexible adjustment. However, the accuracy is difficult to control throughout the lifting process, and precise positioning cannot be achieved. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this invention provides a micro-adjustment method for gantry cranes. This invention enables high-precision micro-adjustment control in the X, Y, and Z directions to achieve accurate positioning.

[0006] This invention is achieved through the following technical solution: A method for fine-tuning a gantry crane, characterized by comprising the following steps: a. In the X direction, a mobile platform is arranged on the trolley frame, and a transfer device is installed at the bottom of the mobile platform. A square steel rail for sliding the transfer device is set on the upper part of the trolley frame. The square steel rail is arranged along the direction of the trolley traveling mechanism. A transverse hydraulic cylinder is set between the mobile platform and the trolley frame. One end of the transverse hydraulic cylinder is fixed on the trolley frame, and the other end is fixed on the mobile platform. The transverse hydraulic cylinder drives the mobile platform to move along the direction of the square steel rail. A full stroke detection sensor is installed on the transverse hydraulic cylinder to control the moving distance. Two pairs of horizontal wheels are set on both sides of the square steel rail and welded to the mobile platform. The horizontal wheels are clamped in the square steel rail clamp. In the b and Y directions, two motor-driven wheels are set on the trolley traveling mechanism, and two micro-motion traveling wheels are set, which are driven by servo motors. In the c and Z directions, the balance pulley is installed on the moving platform. The balance pulley is driven by a vertical push cylinder, which drives the balance pulley to move up or down.

[0007] In step a, the X direction specifically refers to the traveling direction of the gantry crane trolley.

[0008] In step b, the Y direction specifically refers to the traveling direction of the gantry crane trolley.

[0009] In step b, the Z direction specifically refers to the lifting direction of the hoisting device.

[0010] The gantry crane includes a gantry frame, a gantry crane trolley, and a gantry crane auxiliary trolley. The auxiliary trolley is located at the top of the gantry frame, and the gantry crane trolley is located at the bottom of the gantry frame. A hoisting device is mounted on the trolley frame, and a swivel hoist is connected to the hoisting device. The hoisting device includes a drum, a wire rope, a motor, a reducer, a movable pulley block, a brake, and a balance pulley mechanism. The drum is connected to the reducer, the input end of the brake is driven by the output end of the motor, and the output end of the brake is driven by the reducer. The balance pulley mechanism includes a support... The system includes a beam, a first guide frame, a second guide frame, a pulley shaft, and a balance pulley mounted on the pulley shaft. A vertical push hydraulic cylinder is installed at the top of the support beam and is connected to the support beam. The first guide frame is fixed to one side of the bottom of the support beam, and the second guide frame is fixed to the other side of the bottom of the support beam. One end of the pulley shaft is slidably connected to the first guide frame, and the other end of the pulley shaft is slidably connected to the second guide frame. The piston rod of the vertical push hydraulic cylinder is connected to the pulley shaft. The wire rope is wound around a drum, a movable pulley block, and a balance pulley.

[0011] The rotating lifting device includes a slewing mechanism, a first pulley, a second pulley, and a lifting beam. The first pulley is fixed on one side of the slewing mechanism, the second pulley is fixed on the other side of the slewing mechanism, and the lifting beam is fixed at the bottom of the slewing mechanism.

[0012] The lifting device is mounted on the mobile platform, and the horizontal hydraulic cylinder drives the lifting device to reciprocate along the direction of the gantry crane.

[0013] The vertical push hydraulic cylinder drives the pulley shaft, which in turn drives the balance pulley to move up and down.

[0014] The first guide frame has a first guide groove for sliding the pulley shaft, and the second guide frame has a second guide groove for sliding the pulley shaft. The first guide groove and the second guide groove have the same length.

[0015] The bottom of the first guide frame is fixedly connected to a first anti-shear block for counteracting the vertical downward shear force, and the bottom of the second guide frame is fixedly connected to a second anti-shear block for counteracting the vertical downward shear force.

[0016] The beneficial effects of this invention are mainly reflected in the following aspects: 1. In this invention, in directions a and x, a mobile platform is arranged on a trolley frame, a transfer device is installed at the bottom of the mobile platform, and a square steel rail for sliding the transfer device is provided on the upper part of the trolley frame. The square steel rail is arranged along the direction of the trolley traveling mechanism. A transverse hydraulic cylinder is installed between the mobile platform and the trolley frame. One end of the transverse hydraulic cylinder is fixed to the trolley frame, and the other end is fixed to the mobile platform. The transverse hydraulic cylinder drives the mobile platform to move along the direction of the square steel rail. A full-stroke detection sensor is installed on the transverse hydraulic cylinder to control the moving distance. Two pairs of horizontal wheels are installed on both sides and welded to the moving platform, clamping the horizontal wheels onto square steel rail clamps; b. In the Y direction, two motor-driven wheels are installed on the trolley traveling mechanism, and two micro-motion traveling wheels are installed, driven by servo motors; c. In the Z direction, a balance pulley is installed on the moving platform, driven by a vertical push cylinder, which drives the balance pulley to move up or down. Compared with the existing technology, it can perform high-precision micro-motion control in the X, Y and Z directions to achieve precise positioning requirements. 2. In this invention, the gantry crane includes a gantry frame, a gantry crane trolley, and a gantry crane auxiliary trolley. The auxiliary trolley is located at the top of the gantry frame, and the gantry crane trolley is located at the bottom of the gantry frame. A hoisting device is installed on the trolley frame, and a rotating lifting device is connected to the hoisting device. The hoisting device includes a drum, a wire rope, a motor, a reducer, a movable pulley block, a brake, and a balance pulley mechanism. The drum is connected to the reducer, the input end of the brake is driven by the output end of the motor, and the output end of the brake is driven by the reducer. The balance pulley mechanism includes a support beam, a first guide frame, a second guide frame, a pulley shaft, and a mechanism mounted on the sliding beam. The balance pulley on the axle and the top of the support beam are equipped with a vertical push hydraulic cylinder connected to the support beam. The first guide frame is fixed to one side of the bottom of the support beam, and the second guide frame is fixed to the other side of the bottom of the support beam. One end of the pulley axle is slidably connected to the first guide frame, and the other end of the pulley axle is slidably connected to the second guide frame. The piston rod of the vertical push hydraulic cylinder is connected to the pulley axle. The wire rope is wound around the drum, the moving pulley block, and the balance pulley. Compared with the existing technology, it can achieve precise positioning in the lifting direction of the lifting device, thereby greatly improving the installation accuracy and efficiency of the precast pavement panels. 3. The present invention provides a rotating lifting device comprising a slewing mechanism, a first pulley, a second pulley, and a lifting beam. The first pulley is fixed on one side of the slewing mechanism, the second pulley is fixed on the other side of the slewing mechanism, and the lifting beam is fixed at the bottom of the slewing mechanism. This device enables the precast pavement panels to rotate 360 ​​degrees during the lifting process, facilitating installation. 4. In this invention, the lifting device is set on a mobile platform, and the horizontal push hydraulic cylinder drives the lifting device to reciprocate along the direction of the gantry crane. Since the horizontal push hydraulic cylinder can perform stroke detection, the lifting device can be accurately positioned along the direction of the gantry crane, which helps to improve the installation accuracy of the precast pavement panel.

[0017] 5. In this invention, a vertical push hydraulic cylinder drives a pulley shaft to move a balance pulley up and down. The vertical push hydraulic cylinder can detect the stroke, thereby effectively improving the lifting accuracy.

[0018] 6. In this invention, a first guide groove for sliding of the pulley shaft is provided on the first guide frame, and a second guide groove for sliding of the pulley shaft is provided on the second guide frame. The first guide groove and the second guide groove have the same length, which helps to improve the smoothness and stability of the sliding of the pulley shaft, thereby ensuring the stability of the balance pulley in use.

[0019] 7. In this invention, the bottom of the first guide frame is fixedly connected to a first anti-shear block for counteracting the vertical downward shear force, and the bottom of the second guide frame is fixedly connected to a second anti-shear block for counteracting the vertical downward shear force, which can ensure the reliability of the use of the balance pulley. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the gantry crane of the present invention; Figure 2 This is a top view of the roll of the present invention; Figure 3 This is a schematic diagram of the rotating lifting device of the present invention; Figure 4 This is a schematic diagram of the balance pulley mechanism of the present invention; The diagram is labeled as follows: 1. Gantry, 2. Gantry crane trolley, 3. Gantry crane trolley, 4. Trolley frame, 5. Rotating hoist, 6. Drum, 7. Wire rope, 8. Electric motor, 9. Reducer, 10. Moving pulley block, 11. Brake, 12. Balance pulley mechanism, 13. Support beam, 14. First guide frame, 15. Second guide frame, 16. Pulley shaft, 17. Balance pulley, 18. Vertical push hydraulic cylinder, 19. Rotation mechanism, 20. First pulley, 21. Second pulley, 22. Lifting beam, 23. Moving platform, 24. Horizontal push hydraulic cylinder, 25. Transfer device, 26. First shear block, 27. Second shear block. Detailed Implementation

[0021] Example 1 See Figures 1-4 A method for fine-tuning a gantry crane includes the following steps: a. In the X direction, a mobile platform 23 is arranged on the trolley frame 4. A transfer device 25 is installed at the bottom of the mobile platform 23. A square steel rail for sliding the transfer device 25 is set on the upper part of the trolley frame 4. The square steel rail is arranged along the direction of the trolley traveling mechanism. A transverse hydraulic cylinder 24 is set between the mobile platform 23 and the trolley frame 4. One end of the transverse hydraulic cylinder 24 is fixed on the trolley frame 4, and the other end is fixed on the mobile platform 23. The transverse hydraulic cylinder 24 drives the mobile platform 23 to move along the direction of the square steel rail. A full stroke detection sensor is installed on the transverse hydraulic cylinder 24 to control the moving distance. Two pairs of horizontal wheels are set on both sides of the square steel rail and welded to the mobile platform 23. The horizontal wheels are clamped in the square steel rail clamp. In the b and Y directions, two motor-driven wheels are set on the trolley traveling mechanism, and two micro-motion traveling wheels are set, which are driven by servo motors. In the c and Z directions, the balance pulley 17 is installed on the mobile platform 23. The balance pulley 17 is driven by the vertical push cylinder, which drives the balance pulley 17 to move up or down.

[0022] This embodiment is the most basic implementation method. Compared with the prior art, it can perform high-precision micro-motion control in the X, Y and Z directions to achieve precise positioning requirements. Example 2 See Figures 1-4 A method for fine-tuning a gantry crane includes the following steps: a. In the X direction, a mobile platform 23 is arranged on the trolley frame 4. A transfer device 25 is installed at the bottom of the mobile platform 23. A square steel rail for sliding the transfer device 25 is set on the upper part of the trolley frame 4. The square steel rail is arranged along the direction of the trolley traveling mechanism. A transverse hydraulic cylinder 24 is set between the mobile platform 23 and the trolley frame 4. One end of the transverse hydraulic cylinder 24 is fixed on the trolley frame 4, and the other end is fixed on the mobile platform 23. The transverse hydraulic cylinder 24 drives the mobile platform 23 to move along the direction of the square steel rail. A full stroke detection sensor is installed on the transverse hydraulic cylinder 24 to control the moving distance. Two pairs of horizontal wheels are set on both sides of the square steel rail and welded to the mobile platform 23. The horizontal wheels are clamped in the square steel rail clamp. In the b and Y directions, two motor-driven wheels are set on the trolley traveling mechanism, and two micro-motion traveling wheels are set, which are driven by servo motors. In the c and Z directions, the balance pulley 17 is installed on the mobile platform 23. The balance pulley 17 is driven by the vertical push cylinder, which drives the balance pulley 17 to move up or down.

[0023] In step a, the X direction specifically refers to the traveling direction of the gantry crane 2.

[0024] In step b, the Y direction specifically refers to the traveling direction of the gantry crane 3.

[0025] In step b, the Z direction specifically refers to the lifting direction of the hoisting device.

[0026] Preferably, the gantry crane includes a gantry frame 1, a gantry crane trolley 2, and a gantry crane carriage 3. The gantry crane carriage 3 is located at the top of the gantry frame 1, and the gantry crane trolley 2 is located at the bottom of the gantry frame 1. A hoisting device is installed on the carriage frame 4 of the gantry crane carriage 3. A rotating lifting device is connected to the hoisting device. The hoisting device includes a drum 6, a wire rope 7, a motor 8, a reducer 9, a movable pulley block 10, a brake 11, and a balance pulley mechanism 12. The drum 6 is connected to the reducer 9. The input end of the brake 11 is connected to the output end of the motor 8, and the output end of the brake 11 is connected to the reducer 9. The balance pulley mechanism 12 includes a support beam 13, a first... The support beam 13 has a guide frame 14, a second guide frame 15, a pulley shaft 16, and a balance pulley 17 mounted on the pulley shaft 16. A vertical push hydraulic cylinder 18 is provided on the top of the support beam 13 and is connected to the support beam 13. The first guide frame 14 is fixed to one side of the bottom of the support beam 13, and the second guide frame 15 is fixed to the other side of the bottom of the support beam 13. One end of the pulley shaft 16 is slidably connected to the first guide frame 14, and the other end of the pulley shaft 16 is slidably connected to the second guide frame 15. The piston rod of the vertical push hydraulic cylinder 18 is connected to the pulley shaft 16. The wire rope 7 is wound around the drum 6, the movable pulley block 10, and the balance pulley 17.

[0027] This embodiment is a preferred implementation method, which can achieve precise positioning in the lifting direction of the lifting device, thereby greatly improving the installation accuracy and efficiency of precast road panels. Example 3 See Figures 1-4 A method for fine-tuning a gantry crane includes the following steps: a. In the X direction, a mobile platform 23 is arranged on the trolley frame 4. A transfer device 25 is installed at the bottom of the mobile platform 23. A square steel rail for sliding the transfer device 25 is set on the upper part of the trolley frame 4. The square steel rail is arranged along the direction of the trolley traveling mechanism. A transverse hydraulic cylinder 24 is set between the mobile platform 23 and the trolley frame 4. One end of the transverse hydraulic cylinder 24 is fixed on the trolley frame 4, and the other end is fixed on the mobile platform 23. The transverse hydraulic cylinder 24 drives the mobile platform 23 to move along the direction of the square steel rail. A full stroke detection sensor is installed on the transverse hydraulic cylinder 24 to control the moving distance. Two pairs of horizontal wheels are set on both sides of the square steel rail and welded to the mobile platform 23. The horizontal wheels are clamped in the square steel rail clamp. In the b and Y directions, two motor-driven wheels are set on the trolley traveling mechanism, and two micro-motion traveling wheels are set, which are driven by servo motors. In the c and Z directions, the balance pulley 17 is installed on the mobile platform 23. The balance pulley 17 is driven by the vertical push cylinder, which drives the balance pulley 17 to move up or down.

[0028] In step a, the X direction specifically refers to the traveling direction of the gantry crane 2.

[0029] In step b, the Y direction specifically refers to the traveling direction of the gantry crane 3.

[0030] In step b, the Z direction specifically refers to the lifting direction of the hoisting device.

[0031] The gantry crane includes a gantry frame 1, a gantry crane trolley 2, and a gantry crane carriage 3. The gantry crane carriage 3 is located at the top of the gantry frame 1, and the gantry crane trolley 2 is located at the bottom of the gantry frame 1. A hoisting device is installed on the carriage frame 4 of the gantry crane carriage 3. A rotating lifting device 5 is connected to the hoisting device. The hoisting device includes a drum 6, a wire rope 7, a motor 8, a reducer 9, a movable pulley block 10, a brake 11, and a balance pulley mechanism 12. The drum 6 is connected to the reducer 9. The input end of the brake 11 is connected to the output end of the motor 8, and the output end of the brake 11 is connected to the reducer 9. The balance pulley mechanism 12 includes a support beam 13 and a first guide beam 12. The support beam 13 has a support frame 14, a second guide frame 15, a pulley shaft 16, and a balance pulley 17 mounted on the pulley shaft 16. A vertical push hydraulic cylinder 18 is provided on the top of the support beam 13 and is connected to the support beam 13. The first guide frame 14 is fixed to one side of the bottom of the support beam 13, and the second guide frame 15 is fixed to the other side of the bottom of the support beam 13. One end of the pulley shaft 16 is slidably connected to the first guide frame 14, and the other end of the pulley shaft 16 is slidably connected to the second guide frame 15. The piston rod of the vertical push hydraulic cylinder 18 is connected to the pulley shaft 16. The wire rope 7 is wound around the drum 6, the movable pulley block 10, and the balance pulley 17.

[0032] More preferably, the rotating lifting device 5 includes a slewing mechanism 19, a first pulley 20, a second pulley 21, and a lifting beam 22. The first pulley 20 is fixed on one side of the slewing mechanism 19, the second pulley 21 is fixed on the other side of the slewing mechanism 19, and the lifting beam 22 is fixed on the bottom of the slewing mechanism 19.

[0033] This embodiment is another preferred implementation. The rotating hoist 5 includes a slewing mechanism 19, a first pulley 20, a second pulley 21, and a lifting beam 22. The first pulley 20 is fixed on one side of the slewing mechanism 19, the second pulley 21 is fixed on the other side of the slewing mechanism 19, and the lifting beam 22 is fixed on the bottom of the slewing mechanism 19. This allows the precast pavement panels to rotate 360 ​​degrees during the hoisting process, which is convenient for installation. Example 4 See Figures 1-4 A method for fine-tuning a gantry crane includes the following steps: a. In the X direction, a mobile platform 23 is arranged on the trolley frame 4. A transfer device 25 is installed at the bottom of the mobile platform 23. A square steel rail for sliding the transfer device 25 is set on the upper part of the trolley frame 4. The square steel rail is arranged along the direction of the trolley traveling mechanism. A transverse hydraulic cylinder 24 is set between the mobile platform 23 and the trolley frame 4. One end of the transverse hydraulic cylinder 24 is fixed on the trolley frame 4, and the other end is fixed on the mobile platform 23. The transverse hydraulic cylinder 24 drives the mobile platform 23 to move along the direction of the square steel rail. A full stroke detection sensor is installed on the transverse hydraulic cylinder 24 to control the moving distance. Two pairs of horizontal wheels are set on both sides of the square steel rail and welded to the mobile platform 23. The horizontal wheels are clamped in the square steel rail clamp. In the b and Y directions, two motor-driven wheels are set on the trolley traveling mechanism, and two micro-motion traveling wheels are set, which are driven by servo motors. In the c and Z directions, the balance pulley 17 is installed on the mobile platform 23. The balance pulley 17 is driven by the vertical push cylinder, which drives the balance pulley 17 to move up or down.

[0034] In step a, the X direction specifically refers to the traveling direction of the gantry crane 2.

[0035] In step b, the Y direction specifically refers to the traveling direction of the gantry crane 3.

[0036] In step b, the Z direction specifically refers to the lifting direction of the hoisting device.

[0037] The gantry crane includes a gantry frame 1, a gantry crane trolley 2, and a gantry crane carriage 3. The gantry crane carriage 3 is located at the top of the gantry frame 1, and the gantry crane trolley 2 is located at the bottom of the gantry frame 1. A hoisting device is installed on the carriage frame 4 of the gantry crane carriage 3. A rotating lifting device 5 is connected to the hoisting device. The hoisting device includes a drum 6, a wire rope 7, a motor 8, a reducer 9, a movable pulley block 10, a brake 11, and a balance pulley mechanism 12. The drum 6 is connected to the reducer 9. The input end of the brake 11 is connected to the output end of the motor 8, and the output end of the brake 11 is connected to the reducer 9. The balance pulley mechanism 12 includes a support beam 13 and a first guide beam 12. The support beam 13 has a support frame 14, a second guide frame 15, a pulley shaft 16, and a balance pulley 17 mounted on the pulley shaft 16. A vertical push hydraulic cylinder 18 is provided on the top of the support beam 13 and is connected to the support beam 13. The first guide frame 14 is fixed to one side of the bottom of the support beam 13, and the second guide frame 15 is fixed to the other side of the bottom of the support beam 13. One end of the pulley shaft 16 is slidably connected to the first guide frame 14, and the other end of the pulley shaft 16 is slidably connected to the second guide frame 15. The piston rod of the vertical push hydraulic cylinder 18 is connected to the pulley shaft 16. The wire rope 7 is wound around the drum 6, the movable pulley block 10, and the balance pulley 17.

[0038] The rotating lifting device 5 includes a slewing mechanism 19, a first pulley 20, a second pulley 21, and a lifting beam 22. The first pulley 20 is fixed on one side of the slewing mechanism 19, the second pulley 21 is fixed on the other side of the slewing mechanism 19, and the lifting beam 22 is fixed at the bottom of the slewing mechanism 19.

[0039] The lifting device is mounted on the mobile platform 23, and the horizontal hydraulic cylinder 24 drives the lifting device to reciprocate along the direction of the gantry crane 2.

[0040] The vertical push hydraulic cylinder 18 drives the pulley shaft 16 to drive the balance pulley 17 to move up and down.

[0041] This embodiment is another preferred implementation. The lifting device is set on the mobile platform 23. The horizontal push hydraulic cylinder 24 drives the lifting device to reciprocate along the direction of the gantry crane 2. Since the horizontal push hydraulic cylinder 24 can perform stroke detection, the lifting device can be accurately positioned along the direction of the gantry crane 2, which helps to improve the installation accuracy of the precast road panel.

[0042] The vertical push hydraulic cylinder 18 drives the pulley shaft 16 to drive the balance pulley 17 to move up and down. The vertical push hydraulic cylinder 18 can perform stroke detection, thereby effectively improving the lifting accuracy.

[0043] Example 5 See Figures 1-4 A method for fine-tuning a gantry crane includes the following steps: a. In the X direction, a mobile platform 23 is arranged on the trolley frame 4. A transfer device 25 is installed at the bottom of the mobile platform 23. A square steel rail for sliding the transfer device 25 is set on the upper part of the trolley frame 4. The square steel rail is arranged along the direction of the trolley traveling mechanism. A transverse hydraulic cylinder 24 is set between the mobile platform 23 and the trolley frame 4. One end of the transverse hydraulic cylinder 24 is fixed on the trolley frame 4, and the other end is fixed on the mobile platform 23. The transverse hydraulic cylinder 24 drives the mobile platform 23 to move along the direction of the square steel rail. A full stroke detection sensor is installed on the transverse hydraulic cylinder 24 to control the moving distance. Two pairs of horizontal wheels are set on both sides of the square steel rail and welded to the mobile platform 23. The horizontal wheels are clamped in the square steel rail clamp. In the b and Y directions, two motor-driven wheels are set on the trolley traveling mechanism, and two micro-motion traveling wheels are set, which are driven by servo motors. In the c and Z directions, the balance pulley 17 is installed on the mobile platform 23. The balance pulley 17 is driven by the vertical push cylinder, which drives the balance pulley 17 to move up or down.

[0044] In step a, the X direction specifically refers to the traveling direction of the gantry crane 2.

[0045] In step b, the Y direction specifically refers to the traveling direction of the gantry crane 3.

[0046] In step b, the Z direction specifically refers to the lifting direction of the hoisting device.

[0047] The gantry crane includes a gantry frame 1, a gantry crane trolley 2, and a gantry crane carriage 3. The gantry crane carriage 3 is located at the top of the gantry frame 1, and the gantry crane trolley 2 is located at the bottom of the gantry frame 1. A hoisting device is installed on the carriage frame 4 of the gantry crane carriage 3. A rotating lifting device 5 is connected to the hoisting device. The hoisting device includes a drum 6, a wire rope 7, a motor 8, a reducer 9, a movable pulley block 10, a brake 11, and a balance pulley mechanism 12. The drum 6 is connected to the reducer 9. The input end of the brake 11 is connected to the output end of the motor 8, and the output end of the brake 11 is connected to the reducer 9. The balance pulley mechanism 12 includes a support beam 13 and a first guide beam 12. The support beam 13 has a support frame 14, a second guide frame 15, a pulley shaft 16, and a balance pulley 17 mounted on the pulley shaft 16. A vertical push hydraulic cylinder 18 is provided on the top of the support beam 13 and is connected to the support beam 13. The first guide frame 14 is fixed to one side of the bottom of the support beam 13, and the second guide frame 15 is fixed to the other side of the bottom of the support beam 13. One end of the pulley shaft 16 is slidably connected to the first guide frame 14, and the other end of the pulley shaft 16 is slidably connected to the second guide frame 15. The piston rod of the vertical push hydraulic cylinder 18 is connected to the pulley shaft 16. The wire rope 7 is wound around the drum 6, the movable pulley block 10, and the balance pulley 17.

[0048] The rotating lifting device 5 includes a slewing mechanism 19, a first pulley 20, a second pulley 21, and a lifting beam 22. The first pulley 20 is fixed on one side of the slewing mechanism 19, the second pulley 21 is fixed on the other side of the slewing mechanism 19, and the lifting beam 22 is fixed at the bottom of the slewing mechanism 19.

[0049] The lifting device is mounted on the mobile platform 23, and the horizontal hydraulic cylinder 24 drives the lifting device to reciprocate along the direction of the gantry crane 2.

[0050] The vertical push hydraulic cylinder 18 drives the pulley shaft 16 to drive the balance pulley 17 to move up and down.

[0051] More preferably, the first guide frame 14 has a first guide groove for sliding the pulley shaft 16, and the second guide frame 15 has a second guide groove for sliding the pulley shaft 16, with the first guide groove and the second guide groove having the same length.

[0052] The bottom of the first guide frame 14 is fixedly connected to a first anti-shear block 26 for counteracting the vertical downward shear force, and the bottom of the second guide frame 15 is fixedly connected to a second anti-shear block 27 for counteracting the vertical downward shear force.

[0053] This embodiment is the best implementation. The first guide frame 14 has a first guide groove for sliding the pulley shaft 16, and the second guide frame 15 has a second guide groove for sliding the pulley shaft 16. The first guide groove and the second guide groove have the same length, which helps to improve the smoothness and stability of sliding the pulley shaft 16, thereby ensuring the stability of the balance pulley 17 in use.

[0054] The bottom of the first guide frame 14 is fixedly connected to a first anti-shear block 26 for counteracting the vertical downward shear force, and the bottom of the second guide frame 15 is fixedly connected to a second anti-shear block 27 for counteracting the vertical downward shear force, which can ensure the reliability of the use of the balance pulley 17.

[0055] The working principle of the gantry crane of this invention is as follows: A specific balance pulley mechanism 12 is installed on the crane, organically combining the balance pulley 17 and the movable pulley group 10. During the lifting of the precast track panel, the pulley shaft 16 is driven to slide up and down along the first guide frame 14 and the second guide frame 15 by the vertical push hydraulic cylinder 18 with stroke detection, thereby driving the balance pulley 17 to make up-and-down micro movements, and then driving the entire lifting device to achieve up-and-down micro movements, so that the lifting accuracy of the precast track panel is controllable, greatly improving the lifting accuracy and lifting efficiency. By connecting the horizontal push hydraulic cylinder 24 to the lifting device, the horizontal push hydraulic cylinder 24 drives the lifting device to reciprocate along the direction of the gantry crane 2. Since the horizontal push hydraulic cylinder 24 can perform stroke detection, the movement of the lifting device along the direction of the gantry crane 2 can be accurately positioned, thereby further improving the installation accuracy of the precast track panel.

Claims

1. A method for fine-tuning a gantry crane, characterized in that, Includes the following steps: a. In the X direction, a mobile platform (23) is arranged on the trolley frame (4), and a transfer device (25) is installed at the bottom of the mobile platform (23). A square steel rail for the transfer device (25) to slide is set on the upper part of the trolley frame (4). The square steel rail is arranged along the direction of the trolley traveling mechanism. A horizontal push hydraulic cylinder (24) is set between the mobile platform (23) and the trolley frame (4). One end of the horizontal push hydraulic cylinder (24) is fixed on the trolley frame (4), and the other end is fixed on the mobile platform (23). The horizontal push hydraulic cylinder (24) drives the mobile platform (23) to move along the direction of the square steel rail. A full stroke detection sensor is installed on the horizontal push hydraulic cylinder (24) to control the moving distance. Two pairs of horizontal wheels are set on both sides of the square steel rail and welded to the mobile platform (23). The horizontal wheels are clamped on the square steel rail clamp. In the b and Y directions, two motor-driven wheels are set on the trolley traveling mechanism, and two micro-motion traveling wheels are set, which are driven by servo motors. In the c and Z directions, the balance pulley (17) is installed on the mobile platform (23). The balance pulley (17) is driven by the vertical push cylinder, which drives the balance pulley (17) to move up or down. The gantry crane includes a gantry (1), a gantry crane trolley (2), and a gantry crane carriage (3). The gantry crane carriage (3) is located on the top of the gantry (1), and the gantry crane trolley (2) is located at the bottom of the gantry (1). A lifting device is installed on the carriage frame (4) of the gantry crane carriage (3). A rotating hoisting device is connected to the lifting device. The lifting device includes a drum (6), a wire rope (7), a motor (8), a reducer (9), a moving pulley block (10), a brake (11), and a balance pulley mechanism (12). The drum (6) is connected to the reducer (9). The input end of the brake (11) is connected to the output end of the motor (8), and the output end of the brake (11) is connected to the reducer (9). The balance pulley mechanism (12) includes a support beam (13), a first The support beam (13) has a guide frame (14), a second guide frame (15), a pulley shaft (16), and a balance pulley (17) mounted on the pulley shaft (16). A vertical push hydraulic cylinder (18) is provided at the top of the support beam (13). The vertical push hydraulic cylinder (18) is connected to the support beam (13). The first guide frame (14) is fixed on one side of the bottom of the support beam (13), and the second guide frame (15) is fixed on the other side of the bottom of the support beam (13). One end of the pulley shaft (16) is slidably connected to the first guide frame (14), and the other end of the pulley shaft (16) is slidably connected to the second guide frame (15). The piston rod of the vertical push hydraulic cylinder (18) is connected to the pulley shaft (16). The wire rope (7) is wound around the drum (6), the movable pulley block (10), and the balance pulley (17).

2. The micro-adjustment method for a gantry crane according to claim 1, characterized in that: In step a, the X direction specifically refers to the traveling direction of the gantry crane (2).

3. The micro-adjustment method for a gantry crane according to claim 1, characterized in that: In step b, the Y direction specifically refers to the traveling direction of the gantry crane trolley (3).

4. The micro-adjustment method for a gantry crane according to claim 1, characterized in that: In step b, the Z direction specifically refers to the lifting direction of the hoisting device.

5. The micro-adjustment method for a gantry crane according to claim 1, characterized in that: The rotating lifting device (5) includes a slewing mechanism (19), a first pulley (20), a second pulley (21), and a lifting beam (22). The first pulley (20) is fixed on one side of the slewing mechanism (19), the second pulley (21) is fixed on the other side of the slewing mechanism (19), and the lifting beam (22) is fixed at the bottom of the slewing mechanism (19).

6. The micro-adjustment method for a gantry crane according to claim 1, characterized in that: The lifting device is mounted on the mobile platform (23), and the horizontal hydraulic cylinder (24) drives the lifting device to reciprocate along the direction of the gantry crane (2).

7. The micro-adjustment method for a gantry crane according to claim 1, characterized in that: The vertical push hydraulic cylinder (18) drives the pulley shaft (16) to drive the balance pulley (17) to move up and down.

8. The micro-adjustment method for a gantry crane according to claim 1, characterized in that: The first guide frame (14) has a first guide groove for sliding the pulley shaft (16), and the second guide frame (15) has a second guide groove for sliding the pulley shaft (16). The first guide groove and the second guide groove have the same length.

9. A method for fine-tuning a gantry crane according to claim 1, characterized in that: The bottom of the first guide frame (14) is fixedly connected to a first anti-shear block (26) for counteracting the vertical downward shear force, and the bottom of the second guide frame (15) is fixedly connected to a second anti-shear block (27) for counteracting the vertical downward shear force.

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