Large steel structure hydraulic lifting device

Abstract

The application relates to the field of crane technology and discloses a large-scale steel structure hydraulic lifting device which comprises a hydraulic support, a slide rail connected to one end of the hydraulic support, a steel frame connected to the lower end of the slide rail, a circular frame installed at the lower end of the steel frame, a hook connected to the lower end of the circular frame, a supporting device installed in the steel frame, a detection device connected to the lower end of the supporting device, a second fixing device installed at the lower end of the detection device and a first fixing device installed at one end of the detection device. The first magnet plate and the second magnet plate are driven to slide downwards by the square cylinder, so that the first magnet plate and the second magnet plate can contact the steel structure, the steel structure is magnetically adsorbed, when the steel structure shakes, the first magnet plate and the second magnet plate are magnetically adsorbed and fixed on the steel structure, the first slide column is used as the support, and the shaking of the steel structure is reduced.

Description

Technical Field

[0001] This invention relates to the field of cranes, specifically to a large-scale steel structure hydraulic lifting device. Background Technology

[0002] A crane is a type of lifting machinery, a machine that performs cyclical, intermittent movements. A work cycle includes: the lifting device raising an item from its location, moving it horizontally to a designated location and lowering it, then reversing the movement to return the lifting device to its original position for the next cycle. Examples include stationary rotary cranes, tower cranes, truck cranes, tire cranes, and crawler cranes. These are multi-action lifting machines that vertically lift and horizontally move heavy objects within a certain range. They are also called hoists. They belong to material handling machinery. The characteristic of a crane's operation is intermittent movement; that is, in a work cycle, the corresponding mechanisms for picking up, moving, and unloading materials work alternately.

[0003] Large steel structures need to be hoisted from the ground into the air and rotated in the air to move them to the appropriate position. However, existing hydraulic lifting devices for large steel structures cause significant swaying of the steel structure when adjusting its angle, which can be dangerous. Furthermore, it is necessary to wait for the steel structure to stop swaying before it can be moved to the designated position. Also, because the angle of adjustment changes after the steel structure sways, it is not possible to precisely adjust it to the required angle position. Summary of the Invention

[0004] This invention provides a hydraulic lifting device for large steel structures, which solves the problem of swaying that occurs when adjusting the angle of existing large steel structure hoisting, as mentioned in the background art.

[0005] The present invention provides the following technical solution: a large steel structure hydraulic lifting device includes a hydraulic support and a slide rail connected to one end of the hydraulic support. A steel frame is connected to the lower end of the slide rail. A circular frame is installed at the lower end of the steel frame. A hook is connected to the lower end of the circular frame. A support device is also installed inside the steel frame. A detection device is connected to the lower end of the support device. A second fixing device is installed at the lower end of the detection device. A first fixing device is installed at one end of the detection device.

[0006] The second fixing device includes a second connecting block installed at the lower end of the detection device, a second magnet plate installed at the lower end of the second connecting block, and a second push rod column slidably connected inside the second connecting block, the second push rod column passing through the lower end of the second magnet plate;

[0007] The support device is used to drive the detection device to slide downwards.

[0008] As an optional solution of the large steel structure hydraulic lifting device of the present invention, the first fixing device includes a first connecting block installed at one end of the detection device, a first magnet plate installed at one end of the first connecting block, a first push rod column slidably connected inside the first connecting block, and the first push rod column passing through one end of the first connecting block.

[0009] As an optional solution of the large steel structure hydraulic lifting device of the present invention, the detection device includes a square tube connected to the lower end of the support device. The square tube is provided with a flow groove. A second piston column is slidably connected inside the flow groove. A second sliding column is slidably connected inside the second piston column. One end of the second sliding column is connected to one end of the first connecting block. The second sliding column is used to drive the first connecting block to slide back and forth to one end.

[0010] As an optional solution of the large steel structure hydraulic lifting device of the present invention, the supporting device includes a piston cylinder disposed inside the second gear, a first piston rod is slidably connected inside the piston cylinder, and the first piston rod and the piston cylinder are connected by a fifth spring.

[0011] As an optional solution of the large steel structure hydraulic lifting device of the present invention, wherein: the first piston column is provided with a first cylindrical groove inside, the upper end of the first piston column is provided with a first sealing groove, and the first sealing groove is connected to the first cylindrical groove.

[0012] The first cylindrical groove is slidably connected to a first sliding column, which passes through the first piston column, and the diameter of the first sliding column is smaller than the inner diameter of the first cylindrical groove.

[0013] A first sealing plate is installed at the upper end of the first sliding column, and the first sealing plate is used to seal the first sealing groove.

[0014] As an optional solution of the large steel structure hydraulic lifting device of the present invention, the inside of the square tube is further provided with a pressure accumulator, and a pressure relief groove is provided between the pressure accumulator and the flow groove. The air at the pressure accumulator is used to squeeze the pressure relief groove open so that the high pressure air at the pressure accumulator can enter the flow groove.

[0015] As an optional solution of the large steel structure hydraulic lifting device of the present invention, the second fixing device has the same structure as the first fixing device;

[0016] Both the first connecting block and the second connecting block have cavities inside. The second push rod and the first push rod are used to compress the air inside the cavities. A first tube is installed at one end of the first connecting block and the second connecting block, and the two first tubes are connected to each other.

[0017] As an optional solution of the large steel structure hydraulic lifting device of the present invention, wherein: a driving device is rotatably connected inside the ring frame, the driving device includes a second gear disposed inside the ring frame, the piston cylinder is installed inside the second gear, a ring block is installed at the lower end of the second gear, a ring is rotatably connected at the lower end of the ring block, and the upper end of the hook is connected to the lower end of the ring.

[0018] The annular block has a piston chamber inside, and a push block is slidably connected inside the piston chamber. The push block passes through one end of the annular block, and the push block and the annular block are connected by a third spring. The upper end of the first tube is connected to one end of the piston chamber.

[0019] The pusher is used to slide to one end of the ring block and abut against the hook;

[0020] A third tube is installed at the upper end of the ring frame, and one end of the third tube is connected to the interior of the piston cylinder and the accumulator chamber respectively.

[0021] As an optional solution of the large steel structure hydraulic lifting device of the present invention, wherein: an air bladder is installed inside the ring frame, and a compression plate is installed at one end of the ring block, the compression plate being used to compress the air bladder to deform.

[0022] The airbag is equipped with a fourth spring inside;

[0023] A motor is installed at one end of the steel frame, and a first gear is installed at the lower end of the motor. The first gear meshes with a second gear.

[0024] As an optional embodiment of the large steel structure hydraulic lifting device of the present invention, a steel ring frame is also installed at the upper end of the steel frame, a bearing is rotatably connected inside the steel ring frame, a second spring is also installed inside the bearing, one end of the second spring is connected to the outer surface of the piston cylinder, and the bearing is used to swing inside the bearing.

[0025] The present invention has the following beneficial effects:

[0026] 1. This large steel structure hydraulic lifting device uses a square tube to drive the first and second magnetic plates to slide downwards, so that the first and second magnetic plates can contact the steel structure and magnetically attract the steel structure. Thus, when the steel structure shakes, it is fixed to the steel structure by the magnetic attraction of the first and second magnetic plates, with the first sliding column as support, thereby reducing the shaking of the steel structure.

[0027] 2. In this large steel structure hydraulic lifting device, after the second or first magnetic plate is magnetically fixed to the steel structure, when the air pressure squeezes the first piston column downwards, the first sliding column on the square cylinder will not move because the second and first magnetic plates are already magnetically fixed to the steel structure. As the air pressure above the first sealing plate gradually increases, the air pressure will squeeze the first piston column downwards, creating a gap between the first sealing plate and the first sealing groove. This allows the high-pressure air above the first sealing plate to enter the first cylindrical groove through the gap and be discharged, thus enabling the downward sliding distance of the first piston column to adapt to the size of all slings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the ring frame of the present invention.

[0030] Figure 3 This is a bottom view of the ring frame of the present invention.

[0031] Figure 4 This is a schematic diagram of the support device of the present invention.

[0032] Figure 5 This is a schematic diagram of the detection device of the present invention.

[0033] Figure 6 This is a partial structural diagram of the driving device of the present invention.

[0034] Figure 7 This is a schematic diagram of the pusher block of the present invention.

[0035] In the diagram: 1. Hydraulic support; 2. Slide rail; 3. Ring frame; 4. Drive device; 5. Support device; 6. Detection device; 7. First fixing device; 8. Second fixing device; 9. Ring; 10. Hook; 11. Vent groove; 12. First spring; 13. First tube; 14. Steel frame ring; 15. Bearing; 16. Second spring; 17. Push block; 18. Piston chamber; 19. Third spring; 20. Steel frame; 41. Motor; 42. First gear; 43. Second gear; 44. Ring block; 45. Extrusion plate; 46. Airbag; 47. Third tube; 4 8. Fourth spring; 51. Piston cylinder; 52. First piston column; 53. First cylindrical groove; 54. First sealing groove; 55. First sealing plate; 56. First sliding column; 57. Fifth spring; 61. Square cylinder; 62. Accumulation chamber; 63. Pressure relief groove; 64. Flow groove; 65. Second piston column; 66. Second cylindrical groove; 67. Second sealing groove; 68. Second sealing plate; 69. Second sliding column; 71. First connecting block; 72. First magnet plate; 73. First push rod column; 81. Second connecting block; 82. Second magnet plate; 83. Second push rod column. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] Please see Figure 1-4 A large steel structure hydraulic lifting device includes a hydraulic support 1 and a slide rail 2 connected to one end of the hydraulic support 1. A steel frame 20 is connected to the lower end of the slide rail 2. A circular frame 3 is installed at the lower end of the steel frame 20. A hook 10 is connected to the lower end of the circular frame 3. A support device 5 is also installed inside the steel frame 20. A detection device 6 is connected to the lower end of the support device 5. A second fixing device 8 is installed at the lower end of the detection device 6. A first fixing device 7 is installed at one end of the detection device 6.

[0039] The second fixing device 8 includes a second connecting block 81 installed at the lower end of the detection device 6, a second magnet plate 82 installed at the lower end of the second connecting block 81, and a second push rod 83 slidably connected inside the second connecting block 81, the second push rod 83 passing through the lower end of the second magnet plate 82.

[0040] The support device 5 is used to drive the detection device 6 to slide downward.

[0041] Large steel structures need to be hoisted from the ground into the air and rotated in the air to move them to the appropriate position. However, existing hydraulic lifting devices for large steel structures cause significant swaying of the steel structure when adjusting its angle, which can be dangerous. Furthermore, it is necessary to wait for the steel structure to stop swaying before it can be moved to the designated position. Also, because the angle of adjustment changes after the steel structure sways, it is not possible to adjust it to the required angle position precisely.

[0042] according to Figure 1 As shown, the steel structure is suspended from the hook 10 by slings. Then, the hydraulic support 1 moves the circular frame 3 and the hook 10 into the air. Subsequently, by rotating the hook 10 around the axis of the circular frame 3, the hook 10 causes the slings and steel structure to change angular positions. To reduce swaying after the steel structure moves, according to... Figure 4 As shown, when the hook 10 drives the steel structure to rotate and change angle, the second magnet plate 82 is magnetically attached to the steel structure, thereby using the rigidity of the second magnet plate 82 as support to reduce the swaying of the steel structure.

[0043] Example 2

[0044] This embodiment is an improvement upon embodiment 1. For details, please refer to [link / reference]. Figure 1-4 The first fixing device 7 includes a first connecting block 71 installed at one end of the detection device 6, a first magnet plate 72 installed at one end of the first connecting block 71, and a first push rod 73 slidably connected inside the first connecting block 71, the first push rod 73 passing through one end of the first connecting block 71.

[0045] according to Figure 4 As shown, since the second magnet plate 82 is located directly below the ring frame 3 and between the two hooks 10, the second magnet plate 82 can magnetically attract and adhere to the steel structure directly below the ring frame 3. However, when encountering an irregularly shaped steel structure or when the steel structure is in an empty slot, the second magnet plate 82 cannot attract the steel structure. Therefore, a first magnet plate 72 is set at one end of the detection device 6. The first magnet plate 72 magnetically attracts and adheres to the steel structure below the ring frame 3, thereby further improving the range of magnetic attraction.

[0046] Furthermore, multiple first magnet plates 72 can be provided, and multiple first magnet plates 72 are arranged in a ring array around the outer surface of the second magnet plate 82.

[0047] Example 3

[0048] This embodiment is an improvement upon embodiment 2. For details, please refer to [link / reference]. Figure 1-4The detection device 6 includes a square tube 61 connected to the lower end of the support device 5. A flow groove 64 is provided inside the square tube 61. A second piston rod 65 is slidably connected inside the flow groove 64. A second sliding rod 69 is slidably connected inside the second piston rod 65. One end of the second sliding rod 69 is connected to one end of the first connecting block 71. The second sliding rod 69 is used to drive the first connecting block 71 to slide back and forth to one end.

[0049] according to Figure 4 As shown, by sliding the second piston column 65 and the second sliding column 69 left and right, the second sliding column 69 drives the first magnetic plate 72 to slide left and right. The first magnetic plate 72 slides left and right to detect whether there is a steel structure in the surrounding area. When a steel structure is encountered, the magnetic attraction property of the first magnetic plate 72 is used to attract and stick the steel structure.

[0050] Example 4

[0051] This embodiment is an improvement upon embodiment 3. For details, please refer to [link / reference]. Figure 1-4 The support device 5 includes a piston cylinder 51 disposed inside the second gear 43, and a first piston rod 52 is slidably connected inside the piston cylinder 51. The first piston rod 52 and the piston cylinder 51 are connected by a fifth spring 57.

[0052] The first piston rod 52 has a first cylindrical groove 53 inside, and a first sealing groove 54 is provided at the upper end of the first piston rod 52. The first sealing groove 54 is connected to the first cylindrical groove 53.

[0053] The first cylindrical groove 53 is slidably connected to a first sliding column 56, which passes through the first piston column 52. The diameter of the first sliding column 56 is smaller than the inner diameter of the first cylindrical groove 53.

[0054] A first sealing plate 55 is installed at the upper end of the first sliding column 56. The first sealing plate 55 is used to seal the first sealing groove 54.

[0055] according to Figure 4 As shown, by injecting air into the piston cylinder 51, the first piston column 52 is pushed downward by the high-pressure air. The first piston column 52 drives the first sliding column 56 to slide downward, and the first sliding column 56 drives the square cylinder 61 to slide downward. Since the square cylinder 61 is provided with a first magnetic plate 72 and a second magnetic plate 82 on its lower surface and outer surface, the square cylinder 61 drives the first magnetic plate 72 and the second magnetic plate 82 to slide downward, so that the first magnetic plate 72 and the second magnetic plate 82 can contact the steel structure and magnetically attract the steel structure. Thus, when the steel structure shakes, it is magnetically attracted and fixed to the steel structure by the first magnetic plate 72 and the second magnetic plate 82, with the first sliding column 56 as support, thereby reducing the shaking of the steel structure.

[0056] It should be noted that, due to the varying lengths of the slings, the downward sliding distance of the first sliding column 56 needs to be adapted to the sling to allow the second magnetic plate 82 and the first magnetic plate 72 to magnetically adhere to the steel structure. Therefore, a first cylindrical groove 53 is provided inside the first piston column 52. When the second magnetic plate 82 or the first magnetic plate 72 is magnetically fixed to the steel structure, as the air pressure compresses the first piston column 52 downward, the first sliding column 56 on the square tube 61 will not move because the second magnetic plate 82 and the first magnetic plate 72 are already magnetically fixed to the steel structure. As the air pressure above the first sealing plate 55 gradually increases, the air pressure will compress the first piston column 52 downward, creating a gap between the first sealing plate 55 and the first sealing groove 54. This allows the high-pressure air above the first sealing plate 55 to enter the first cylindrical groove 53 through this gap and be discharged, thus ensuring that the downward sliding distance of the first piston column 52 is adapted to the size of all slings.

[0057] Example 5

[0058] This embodiment is an improvement upon embodiment 4. For details, please refer to [link / reference]. Figure 1-4 The inside of the square tube 61 is also provided with a pressure accumulator 62, and a pressure relief groove 63 is provided between the pressure accumulator 62 and the flow groove 64. The air in the pressure accumulator 62 is used to squeeze the pressure relief groove 63 to open so that the high pressure air in the pressure accumulator 62 can enter the flow groove 64.

[0059] according to Figure 4 As shown, by transmitting air into the accumulator 62, when the air pressure exceeds the pressure relief value of the pressure relief groove 63, the pressure relief groove 63 opens, allowing the high-pressure air in the accumulator 62 to pass through the pressure relief groove 63 and enter the flow groove 64. This high-pressure air compresses the second sealing plate 68 and the second piston rod 65 to slide to one side and compresses the first spring 12. Therefore, the second piston rod 65 drives the second sliding rod 69 and the first magnetic plate 72 to slide to one end. Subsequently, when one end of the second piston rod 65 moves to the air relief groove 11, it pushes... The high-pressure air sliding from the second piston column 65 will be discharged from the vent groove 11, and then the elastic potential energy will be released through the first spring 12, pushing the second piston column 65 to reset, thereby pulling the first magnet plate 72 to slide to the other end. Then, when the air pressure inside the pressure accumulator 62 is greater than the pressure relief value of the pressure relief groove 63, the pressure relief groove 63 will open again, and the high pressure at the pressure accumulator 62 will push the second piston column 65 to slide. This cycle repeats, causing the first magnet plate 72 to slide back and forth, thereby allowing the first magnet plate 72 to intermittently search for the steel structure.

[0060] It should be noted that when the first magnet plate 72 comes into contact with the steel structure, the high-pressure gas in the accumulator 62 will only push the second piston column 65 to slide to one end, so that a gap appears between the second sealing plate 68 and the second sealing groove 67, allowing the air to flow to the second cylindrical groove 66 and be discharged.

[0061] Example 6

[0062] This embodiment is an improvement upon embodiment 5. For details, please refer to [link / reference]. Figure 1-7 The second fixing device 8 has the same structure as the first fixing device 7;

[0063] Both the first connecting block 71 and the second connecting block 81 have cavities inside. The second push rod 83 and the first push rod 73 are used to compress the air inside the cavity. A first tube 13 is installed at one end of the first connecting block 71 and the second connecting block 81, and the two first tubes 13 are connected to each other.

[0064] The inner part of the ring frame 3 is also rotatably connected to a drive device 4. The drive device 4 includes a second gear 43 disposed inside the ring frame 3, a piston cylinder 51 installed inside the second gear 43, a ring block 44 installed at the lower end of the second gear 43, a ring 9 rotatably connected at the lower end of the ring block 44, and the upper end of the hook 10 connected to the lower end of the ring 9.

[0065] The annular block 44 has a piston chamber 18 inside, and a push block 17 is slidably connected inside the piston chamber 18. The push block 17 passes through one end of the annular block 44, and the push block 17 and the annular block 44 are connected by a third spring 19. The upper end of the first tube 13 is connected to one end of the piston chamber 18.

[0066] The pusher 17 is used to slide to one end of the ring block 44 and abut against the hook 10;

[0067] A third tube 47 is installed at the upper end of the ring frame 3, and one end of the third tube 47 is connected to the interior of the piston cylinder 51 and the accumulator 62 respectively.

[0068] An airbag 46 is installed inside the ring frame 3, and a compression plate 45 is installed at one end of the ring block 44. The compression plate 45 is used to compress the airbag 46 to deform.

[0069] The airbag 46 is equipped with a fourth spring 48 inside;

[0070] A motor 41 is installed at one end of the steel frame 20, and a first gear 42 is installed at the lower end of the motor 41. The first gear 42 meshes with the second gear 43.

[0071] according to Figure 6 and Figure 7 As shown, a third pipe 47 is installed on the piston cylinder 51. An air pump is installed on the hydraulic support 1, and the third pipe 47 is connected to the air pump. High-pressure air is transmitted to the third pipe 47 through the air pump. The high-pressure air squeezes the first piston column 52 to slide downward. The third pipe 47 also transmits high-pressure air into the accumulator 62, thereby achieving the driving effect of embodiment 5.

[0072] according to Figure 6 As shown, by installing an airbag 46 inside the ring frame 3, when the hook 10 needs to rotate to drive the steel structure to adjust the angle, the motor 41 drives the first gear 42 to rotate, the first gear 42 drives the second gear 43 to rotate, the second gear 43 drives the ring block 44 to rotate, and the ring block 44 drives the extrusion plate 45 to press on the airbag 46. The extrusion plate 45 extrudes the air inside the airbag 46 to the third pipe 47, so that the third pipe 47 transmits high-pressure air to the inside of the piston cylinder 51 and the inside of the accumulator 62, thereby achieving the driving effect of embodiment 5.

[0073] according to Figure 7 As shown, when the first magnet plate 72 or the second magnet plate 82 is magnetically attached to the steel structure, the steel structure will squeeze the second push rod column 83 or the first push rod column 73 to slide. The second push rod column 83 or the first push rod column 73 squeezes the air inside the first connecting block 71 or the second connecting block 81 into the first pipe 13. The first pipe 13 squeezes the air into the piston chamber 18, thereby pushing the push block 17 to slide out of the inner ring block 44. Since the second gear 43 rotates, it will also drive the ring block 44 to rotate. The ring block 44 drives the push block 17 to rotate. The push block 17 abuts against the hook 10, thereby driving the hook 10 to rotate and adjust the angle.

[0074] It should be noted that its two hooks 10 are rotatably connected to the lower end of the ring frame 3 via the ring 9;

[0075] The steel frame ring 14 is rotatably connected to a bearing 15. A second spring 16 is also installed inside the bearing 15. One end of the second spring 16 is connected to the outer surface of the piston cylinder 51. The bearing 15 is used to swing inside the bearing 15.

[0076] Furthermore, since the rigid material connected to the steel structure will break after a long period of use when the steel structure sways significantly in the air, existing hoisting methods use steel cables and slings. However, in this embodiment, the first sliding column 56, the first magnet plate 72, and the second magnet plate 82 are needed to fix the steel structure and reduce its swaying in the air. Therefore, to improve service life, a second spring 16 is installed on the outer surface of the piston cylinder 51. When the steel structure sways, it will cause the first magnet plate 72 or the second magnet plate 82 to sway. The first magnet plate 72 or the second magnet plate 82 will cause the first sliding column 56 and the piston cylinder 51 to sway. The piston cylinder 51 compresses the second spring 16, thereby absorbing and damping shock and improving the flexibility of the piston cylinder 51.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0078] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A large steel structure hydraulic lifting device, comprising a hydraulic support (1), one end of the hydraulic support (1) is connected with a sliding rail (2), characterized in that: The lower end of the slide rail (2) is connected with a steel frame (20), the lower end of the steel frame (20) is installed with a circular ring frame (3), the lower end of the circular ring frame (3) is connected with a hook (10), the inside of the steel frame (20) is further installed with a supporting device (5), the lower end of the supporting device (5) is connected with a detecting device (6), the lower end of the detecting device (6) is installed with a second fixing device (8), one end of the detecting device (6) is installed with a first fixing device (7); The second fixing device (8) comprises a second connecting block (81) installed at the lower end of the detecting device (6), the lower end of the second connecting block (81) is installed with a second magnet plate (82), the inside of the second connecting block (81) is slidably connected with a second push rod column (83), the second push rod column (83) penetrates the lower end of the second magnet plate (82); The supporting device (5) is used for driving the detecting device (6) to slide downwards; The first fixing device (7) comprises a first connecting block (71) installed at one end of the detecting device (6), one end of the first connecting block (71) is installed with a first magnet plate (72), the inside of the first connecting block (71) is slidably connected with a first push rod column (73), the first push rod column (73) penetrates one end of the first connecting block (71); The detecting device (6) comprises a square tube (61) connected at the lower end of the supporting device (5), the inside of the square tube (61) is provided with a flow groove (64), the inside of the flow groove (64) is slidably connected with a second piston column (65), the inside of the second piston column (65) is slidably connected with a second slide column (69), one end of the second slide column (69) is connected with one end of the first connecting block (71), and the second slide column (69) is used for driving the first connecting block (71) to reciprocatingly slide towards one end; The supporting device (5) comprises a piston cylinder (51), the inside of the piston cylinder (51) is slidably connected with a first piston column (52), and the first piston column (52) is connected with the piston cylinder (51) through a fifth spring (57); The inside of the first piston column (52) is provided with a first cylinder groove (53), the upper end of the first piston column (52) is provided with a first sealing groove (54), and the first sealing groove (54) is in communication with the first cylinder groove (53); The inside of the first cylinder groove (53) is slidably connected with a first slide column (56), the first slide column (56) penetrates the first piston column (52), and the diameter of the first slide column (56) is smaller than the inner diameter of the first cylinder groove (53); The upper end of the first slide column (56) is installed with a first sealing plate (55), and the first sealing plate (55) is used for sealing the first sealing groove (54).

2. The hydraulic lifting device for large steel structures according to claim 1, characterized in that: The inside of the square tube (61) is further provided with an accumulator cavity (62), a pressure relief groove (63) is arranged between the accumulator cavity (62) and the flow groove (64), and the air at the accumulator cavity (62) is used for extruding the pressure relief groove (63) to open, so that the high-pressure air at the accumulator cavity (62) enters the flow groove (64).

3. The hydraulic lifting device for large steel structures according to claim 1, characterized in that: The second fixing device (8) is the same as the first fixing device (7) in structure. The first connecting block (71) and the second connecting block (81) are internally provided with cavities, the second push rod column (83) and the first push rod column (73) are used for extruding air in the cavities, and one end of the first connecting block (71) and the second connecting block (81) is provided with a first pipe (13), and the two first pipes (13) are communicated.

4. The hydraulic lifting device for large steel structures according to claim 3, characterized in that: The inside of the circular ring frame (3) is also rotatably connected with a driving device (4), the driving device (4) comprises a second gear (43) arranged in the circular ring frame (3), the piston cylinder (51) is arranged in the second gear (43), the lower end of the second gear (43) is provided with a circular ring block (44), the lower end of the circular ring block (44) is rotatably connected with a circular ring (9), and the upper end of the hook (10) is connected with the lower end of the circular ring (9). The inside of the circular ring block (44) is provided with a piston cavity (18), the piston cavity (18) is slidably connected with a push block (17), one end of the push block (17) penetrates the circular ring block (44), the push block (17) and the circular ring block (44) are connected through a third spring (19), and the upper end of the first pipe (13) is communicated with one end of the piston cavity (18). The push block (17) is used for sliding to one end of the circular ring block (44) and abutting against the hook (10). The upper end of the circular ring frame (3) is provided with a third pipe (47), and one end of the third pipe (47) is communicated with the inside of the piston cylinder (51) and the inside of the pressure storage cavity (62).

5. The hydraulic lifting device for large steel structures according to claim 4, characterized in that: The inside of the circular ring frame (3) is provided with a gas bag (46), one end of the circular ring block (44) is provided with an extrusion plate (45), and the extrusion plate (45) is used for extruding the gas bag (46) to deform. The inside of the gas bag (46) is provided with a fourth spring (48). One end of the steel frame (20) is provided with a motor (41), the lower end of the motor (41) is provided with a first gear (42), and the first gear (42) is engaged with the second gear (43).

6. The hydraulic lifting device for large steel structures according to claim 5, characterized in that: The upper end of the steel frame (20) is also provided with a steel frame ring (14), the inside of the steel frame ring (14) is rotatably connected with a bearing (15), the inside of the bearing (15) is also provided with a second spring (16), one end of the second spring (16) is connected with the outer surface of the piston cylinder (51), and the piston cylinder (51) is used for swinging in the bearing (15).

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