Large-span steel structure roof self-balancing integral lifting system and construction method

Abstract

This invention relates to a self-balancing overall lifting system and construction method for a large-span steel structure roof. Steel strands are threaded through the diagonal braces of the four corner lifting supports of the steel structure roof. A liquid storage chamber and a liquid drainage chamber are provided within the fixing ring. A pressure ring is installed in the liquid storage chamber, and a rotating ring with inclined holes is installed in the liquid drainage chamber. When the steel strands move upwards, a ratchet gear drives a cam to push the pressure ring, squeezing out lubricating oil through the inclined holes to coat the steel strands. A guy rope on a winding roller on the foundation connects to the roof. The winding roller drives a fixed plate and a sliding plate, both immersed in silicone oil, to rotate via a coaxial rotating shaft II. When the roof sways, the sliding plate moves outwards, causing the through-holes to misalign to adjust damping. A wedge-shaped groove is provided at the top of the slide rail seat, with a spring-loaded wedge block inside to release temperature stress. This invention solves the problems in existing large-span steel structure roof lifting operations, such as steel strand lubrication failure leading to clamping jams, and roof swaying caused by high-altitude gusts of wind resulting in unstable lifting force, affecting the stability, safety, and service life of the lifting operation.

Description

Technical Field

[0001] This invention belongs to the field of steel structure construction technology, and relates to a self-balancing overall lifting system and construction method for a large-span steel structure roof. Background Technology

[0002] Large-span steel structure roofs are widely used in stadiums, convention centers, and other buildings. They are typically installed using hydraulic lifting technology, where multiple lifting supports simultaneously pull steel strands to gradually raise the roof from the ground to the design elevation. During lifting, the steel strands must pass through hydraulic lifting anchors within the lifting supports, which rely on clamps to provide holding force. In actual construction, it has been found that in corrosive environments such as coastal areas or chemical industrial parks, the surface of the steel strands easily accumulates salt spray or dust particles from the air. As the steel strands reciprocate within the anchors, these impurities are carried into the contact surface between the clamps and the steel strands, causing the clamps to jam or damage the steel strands, affecting the stability and safety of the lifting process. The conventional practice is to manually apply lubricant to the steel strands before lifting. However, the lifting operation is lengthy, and the lubricant gradually becomes ineffective after repeated raising and lowering of the steel strands. Manual reapplication requires interrupting the operation and is difficult to access the steel strand sections inside the anchors. Some construction companies have added electric lubrication pumps next to the lifting equipment to deliver lubricating oil to the surface of the steel strands through pipelines. However, each lifting support needs to be equipped with a separate pump set and pipeline, which is complicated in terms of wiring and has a high equipment investment cost.

[0003] Furthermore, the large span of the roof, after being lifted to a high altitude, exposes it to a large wind-exposed area. Sudden gusts of wind can easily cause the roof to sway horizontally, which is another key factor contributing to the instability of the lifting process. This horizontal swaying is transmitted to the ground-based winding rollers via the guy ropes, causing frequent forward and reverse rotations. This not only accelerates the wear of the winding roller bearings and guy ropes but, more importantly, generates alternating impact loads throughout the lifting system. This disrupts the coordination of the synchronous traction of multiple lifting supports, leading to swaying and uneven stress during the roof lifting process, severely affecting the stability of the lifting and construction safety. Existing guy rope systems typically lack effective dynamic damping adjustment mechanisms and cannot automatically dissipate swaying energy according to gust intensity. When wind speed changes abruptly, the swaying amplitude of the roof is difficult to suppress in time, and the swaying energy is repeatedly transmitted to the lifting supports via the guy ropes, further exacerbating the instability of the lifting process and potentially even causing equipment vibration or structural resonance. Summary of the Invention

[0004] In view of this, in order to solve the problems in the existing lifting operations of large-span steel structure roofs, such as the failure of steel strand lubrication leading to clamping jamming, and the roof swaying caused by high-altitude gusts of wind causing unstable lifting force, which affect the stability, safety and service life of the lifting operation, the present invention provides a self-balancing overall lifting system and construction method for large-span steel structure roofs.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A self-balancing overall lifting system for a large-span steel structure roof is provided. Steel strands are threaded through the diagonal braces of the four lifting supports at the four corners of the steel structure roof. The bottom ends of the steel strands are connected to slide rail seats, which are fixed to the steel structure roof. The steel strands are driven to rise and fall by a hydraulic lifter inside the lifting supports, thereby controlling the rise and fall of the steel structure roof.

[0007] The fixed ring is fixed to the bottom of the inclined support of the lifting bracket by steel strand. The steel strand passes through the fixed ring. The fixed ring is equipped with an oiling mechanism for automatically applying lubricating oil to the steel strand. The oiling mechanism includes an annular plate fixed inside the fixed ring. The fixed ring forms a liquid storage chamber and a liquid discharge chamber through the annular plate. A pressure ring is slidably connected to the liquid storage chamber. A rotating ring is rotatably connected to the inner wall of the liquid discharge chamber. The rotating ring is provided with multiple inclined holes, and the inclined holes are connected to the liquid discharge chamber. The inclined holes are set at an angle downward.

[0008] Each of the four bases on the foundation is rotatably connected to a winding roller. The outer wall of the winding roller is wound with guy ropes. The top of the guy ropes is fixedly connected to the bottom of the steel structure roof. The tops of the four guy ropes are respectively fixed at the four corners of the bottom of the steel structure roof. An anti-sway mechanism is provided on one side of the base to prevent the steel structure roof from swaying significantly under the action of high-altitude wind. The anti-sway mechanism includes a protective box fixed to one side of the base, a rotating shaft II rotating in the protective box, multiple fixed plates fixed to the outer wall of the rotating shaft II, a sliding plate sliding on one side of the fixed plates, and multiple through holes provided on both the fixed plates and the sliding plates. The through holes on the fixed plates and the sliding plates are interconnected.

[0009] Furthermore, the oiling mechanism also includes two rotating shafts I that rotate on the top of the fixed ring via the base. The two rotating shafts I are symmetrically arranged around the steel strand. A ratchet gear is fixedly fitted onto the outer wall of each rotating shaft I. A drive ring is fixedly fitted onto the outer wall of the steel strand. The outer wall of the drive ring has protrusions that mesh with the ratchet teeth of the ratchet gear. These protrusions engage with the ratchet gear to rotate when the steel strand moves upward under the action of the hydraulic lifter inside the lifting bracket. Cams are provided on both sides of the ratchet gear, and the cams are fixedly fitted onto the outer wall of the rotating shaft I. Two sliding rods I are fixed to the top of the pressure ring. The top of component I slides and extends above the fixed ring, and pressure plates are fixed thereon. The cam cooperates with the pressure plate to drive the pressure plate to move down when the cam rotates. The bottom of the pressure plate and the top of the fixed ring are fixed with two springs I through spring seats, and the two springs I are respectively sleeved on the outer wall of the corresponding sliding rod I to drive the pressure plate to move up and reset. Two U-shaped tubes are fixedly inserted through the annular plate. The liquid storage chamber and the liquid discharge chamber are connected through the U-shaped tubes. The opening of the U-shaped tubes faces down. The bottom end of the U-shaped tube located in the liquid storage chamber is sealed and slides through the pressure ring to discharge the lubricating oil in the liquid storage chamber into the liquid discharge chamber through the U-shaped tube when the pressure ring moves down.

[0010] Furthermore, the oiling mechanism also includes two vertical plates, which are respectively fixed to the bottom of the corresponding pressure plate on the side away from the sliding rod I. Sliders are fixed on the sides of the two vertical plates that are away from each other. The inner wall of the rotating ring is provided with two arc-shaped grooves, and the sliders extend into the arc-shaped grooves and slide in cooperation with the arc-shaped grooves.

[0011] Furthermore, the top of both the pressure plate and the vertical plate is provided with a clearance groove for the ratchet gear to make way. The top of the fixing ring is fixed with a protective cover, and the rotating shaft I, ratchet gear, cam, sliding rod I, spring I, vertical plate and slider are all set inside the protective cover.

[0012] Furthermore, a fixing tube is fixedly inserted inside the pressure ring, and the top end of the fixing tube slides to the top of the fixing ring. A one-way valve is installed inside the fixing tube.

[0013] Furthermore, the anti-sway mechanism also includes a fixed plate I and two fixed plates II fixed on the outer wall of the rotating shaft II. The two fixed plates II are located on both sides of the fixed plate I. Both the fixed plate I and the fixed plate II are fixed through the fixed plate. The outer edge of the fixed plate and the inner wall of the protective box are in a sliding seal fit, allowing only a small amount of silicone oil to leak from the fit gap. The hydraulic oil flows through the through hole. Two sliding rods II are fixed on the top of the sliding plate. The top of the two sliding rods II are sealed and slide to the corresponding fixed plate II. The outer wall of the two sliding rods II is fixedly fitted with a sliding seat, and the sliding seat is slidably set in the corresponding fixed plate II. The outer wall of the sliding rod II is fitted with a spring II. The top and bottom ends of the spring II are fixedly connected to the bottom of the sliding seat and the bottom inner wall of the fixed plate II respectively through the spring seat. One end of the rotating shaft II is sealed and rotates through one side inner wall of the protective box and is fixedly connected to the rotating shaft of the winding roller.

[0014] Furthermore, a counterweight is fixed to the side of the sliding plate away from the fixed plate, and a limiting ring is fixedly sleeved on the outer wall of the sliding rod II, with the limiting ring located on the outside of the fixed plate II.

[0015] Furthermore, multiple heat dissipation fins are fixed to the outer wall of the protective enclosure to dissipate heat from the silicone oil inside the enclosure.

[0016] Furthermore, the top of the slide rail seat is provided with a wedge-shaped groove, and a wedge-shaped block is slidably connected in the wedge-shaped groove. The bottom end of the steel strand is fixedly connected to the top of the wedge-shaped block. A crossbar is fixed in the wedge-shaped groove, and one end of the crossbar slides through the wedge-shaped block. A helical spring is fixed on both sides of the wedge-shaped block. The end of the helical spring away from the wedge-shaped block is fixedly connected to the inner wall of one side of the wedge-shaped groove. The helical spring is sleeved on the outer wall of the crossbar. Corrugated protective covers are fixed on the inner walls of the two sides of the wedge-shaped groove that are far apart from each other. The ends of the two corrugated protective covers that are close to each other are fixedly connected to the two sides of the wedge-shaped block respectively.

[0017] A construction method for a self-balancing integral lifting system for a large-span steel structure roof includes the following steps:

[0018] S1. When the lifting operation begins, the hydraulic lifters in the four lifting supports start synchronously. The lifting cylinders inside the hydraulic lifters extend and retract, and in conjunction with the alternating locking and unlocking of the upper and lower anchor clamps, the steel strands are driven to move upward. The steel strands are fixedly connected to the steel structure roof through the slide rail seat. The upward movement of the steel strands drives the steel structure roof to rise as a whole.

[0019] S2. When the steel strand moves upward, the surface of the steel strand contacts the ratchet teeth of the ratchet gear. The steel strand and the ratchet teeth are engaged by the drive ring protrusion, which meshes with the ratchet gear and the cam. The cam protrusion rotates and pushes the pressure plate downward. The pressure plate transmits the downward displacement to the pressure ring through the sliding rod I, causing the pressure ring to slide downward in the liquid storage chamber. The pressure ring compresses the lubricating oil in the liquid storage chamber. The compressed lubricating oil enters the drain chamber through the U-shaped tube. The lubricating oil is sprayed out through the inclined hole. The sprayed lubricating oil flows downward along the surface of the steel strand, coating the surface of the steel strand.

[0020] S3. When the pressure plate moves downward, it drives the vertical plate and the slider to move downward. The slider slides in the arc groove and drives the rotating ring to rotate around its own axis in one direction. When the pressure plate moves upward, it drives the rotating ring to rotate in the opposite direction. The reciprocating rotation of the rotating ring causes the injection direction of the inclined hole to change in the circumferential direction.

[0021] S4. During the lifting process of the steel structure roof, the steel structure roof sways horizontally under the action of wind. The sway of the steel structure roof is transmitted to the winding roller through the guy rope, causing the winding roller to accelerate. The winding roller drives the rotating shaft II to rotate, causing the fixed plate and the sliding plate to rotate with the rotating shaft II. Under the action of centrifugal force, the sliding plate overcomes the elastic force of spring II and slides radially outward, causing the through holes on the fixed plate and the sliding plate to be misaligned. The effective flow area of ​​the through holes is reduced. When the silicone oil in the protective box passes through the reduced through holes, it converts the rotational kinetic energy of the fixed plate and the sliding plate into the internal energy of the silicone oil. After the wind stops, the speed of the winding roller decreases, spring II pushes the sliding plate to reset, and the through holes are realigned.

[0022] S5. The steel structure roof expands and contracts horizontally due to temperature changes. When the temperature rises, the steel structure roof expands horizontally, causing the slide rail seat to move horizontally in sync. The wedge block at the bottom of the steel strand remains relatively fixed in position, allowing the wedge block to slide relative to the wedge groove and compress the helical spring on one side. When the temperature drops, the helical spring pushes the wedge block back to its original position, causing the steel structure roof to contract.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. The self-balancing overall lifting system for large-span steel structure roofs disclosed in this invention allows the steel strands to move upward under the drive of the lifting support. The ratchet gear attached to the steel strands is driven to rotate, and the cam rotates accordingly, pushing the pressure ring to squeeze the lubricating oil in the storage chamber through the U-shaped tube to the drainage chamber. The lubricating oil flows out from the inclined hole of the rotating ring and is coated on the surface of the steel strands, realizing automatic lubrication of the steel strands during the lifting process. There is no need to interrupt the operation for manual recoating, nor is there a need for external electric lubrication pumps and pipelines, which reduces equipment investment costs and construction complexity.

[0025] 2. The self-balancing overall lifting system for large-span steel structure roofs disclosed in this invention, when the pressure plate moves up and down reciprocally under the action of the cam and spring, drives the rotating ring to reciprocate within a certain angle range through the sliding cooperation between the slider and the arc groove on the inner wall of the rotating ring, so that the inclined hole sprays lubricating oil onto the steel strand at different circumferential positions, thereby increasing the coverage area of ​​the lubricating oil on the surface of the steel strand and avoiding the dead corners caused by spraying in a single direction.

[0026] 3. The self-balancing integral lifting system for large-span steel structure roofs disclosed in this invention, when the winding roller accelerates as the roof sways, the rotating shaft coaxially connected to the winding roller drives the fixed plate and the sliding plate to rotate synchronously. Under centrifugal force, the counterweight at the end of the sliding plate causes the sliding plate to slide outward against the spring force, resulting in misalignment of the through holes on the fixed plate and the sliding plate. This reduces the silicone oil flow cross-section and automatically increases the damping force. When the wind speed decreases or stops, the spring pushes the sliding plate back to its original position, the through holes realign, and the damping force returns to a lower level. This damping mechanism can automatically adjust the magnitude of the damping force according to the roof's sway amplitude without external control.

[0027] 4. The self-balancing overall lifting system for large-span steel structure roofs disclosed in this invention, under large temperature difference conditions, the thrust generated by the horizontal thermal expansion of the roof pushes the wedge block to slide in the wedge groove to overcome the pressure of the spiral spring, releasing temperature stress. When the roof contracts at night, the spring pushes the wedge block to reset, avoiding the concentration of temperature stress at the steel strand connection nodes, reducing the risk of node weld cracking and damage to the lifting cylinder by lateral force.

[0028] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1This is a three-dimensional structural schematic diagram of the self-balancing overall lifting system for the large-span steel structure roof of the present invention;

[0031] Figure 2 This is a three-dimensional structural diagram of the slide rail seat and the fixing ring in this invention;

[0032] Figure 3 This is a three-dimensional exploded view of the fixing ring and protective cover in this invention;

[0033] Figure 4 This is a schematic three-dimensional cross-sectional view of the fixing ring in this invention;

[0034] Figure 5 This is a three-dimensional exploded view of the pressure plate, ratchet gear, and vertical plate in this invention;

[0035] Figure 6 This is a three-dimensional exploded view of the annular plate, rotating ring, and vertical plate in this invention;

[0036] Figure 7 This is a three-dimensional structural diagram of the base and the take-up roller in this invention;

[0037] Figure 8 This is a three-dimensional sectional view of the protective enclosure in this invention;

[0038] Figure 9 This is a three-dimensional structural diagram of the sliding plate, the fixed plate, the fixed disk I, and the fixed disk II in this invention;

[0039] Figure 10 This is a three-dimensional exploded view of the fixed plate and the sliding plate in this invention;

[0040] Figure 11 This is a three-dimensional sectional view of fixed disk I and fixed disk II in this invention;

[0041] Figure 12 This is a three-dimensional exploded view of the slide rail seat, wedge block, and crossbar in this invention;

[0042] Figure 13 This is a three-dimensional cross-sectional view of the slide rail seat and wedge block in this invention;

[0043] Figure 14 A schematic diagram of the connection between the ratchet gear and the drive ring in this invention.

[0044] Reference numerals: 1. Steel roof structure; 2. Lifting bracket; 3. Slide rail seat; 4. Steel strand; 5. Fixing ring; 6. Protective cover; 7. Rotating shaft I; 8. Ratchet; 9. Cam; 10. Sliding rod I; 11. Pressure plate; 12. Spring I; 13. Pressure ring; 14. Annular plate; 15. Liquid storage chamber; 16. Drainage chamber; 17. U-shaped tube; 18. Rotating ring; 19. Inclined hole; 20. Vertical plate; 21. Sliding block; 22. Arc groove; 23. Clearance groove; 24. Base 25. Take-up roller; 26. Guy rope; 27. Protective housing; 28. Rotating shaft II; 29. ​​Fixed plate I; 30. Fixed plate II; 31. Fixed plate; 32. Sliding plate; 33. Counterweight; 34. Through hole; 35. Sliding rod II; 36. Sliding seat; 37. Spring II; 38. Limiting ring; 39. Wedge groove; 40. Wedge block; 41. Crossbar; 42. Helical spring; 43. Corrugated protective cover; 44. Fixed pipe; 45. One-way valve; 46. Drive ring. Detailed Implementation

[0045] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0046] The core components of this large-span steel structure roof self-balancing overall lifting system include lifting support 2, slide rail seat 3, steel strand 4, fixing ring 5, oiling mechanism, base 24, winding roller 25, guy rope 26, and anti-sway mechanism.

[0047] Reference Figure 1 and Figure 2 The large-span steel structure roof 1 is a large steel component to be lifted. Four lifting points are pre-set on the roof 1, located at the four corners of the roof's bottom, for fixed connection with the slide rail seat 3. Four lifting supports 2 are vertically installed on a pre-set load-bearing foundation on the ground. The lifting supports 2 can be set up independently or on the civil structure based on site conditions. The top of the diagonal brace of the lifting supports 2 serves as the main load-bearing component, and a hydraulic lifting device is installed inside. This hydraulic lifting device adopts a through-hole structure, with the steel strand 4 passing through the central channel of the hydraulic lifting device. The hydraulic lifting device alternately releases and locks the steel strand 4 through its internal anchor clamps, coordinating with the extension and retraction of the hydraulic cylinder to drive the steel strand 4 to move up and down. The slide rail seat 3 is fixed at the lifting point position of the steel structure roof 1, and the bottom end of the steel strand 4 is connected to the slide rail seat 3. To guide and protect the steel strand 4 during the lifting process, a fixing ring 5 is fixedly installed at the bottom of the diagonal brace of each lifting support 2 through the steel strand. The central hole of the fixing ring 5 allows the steel strand 4 to pass through.

[0048] Reference Figure 3 and Figure 4 An oiling mechanism is installed inside the fixed ring 5 to automatically apply lubricating oil to the steel strand 4 during the lifting process. The core component of the oiling mechanism is the annular plate 14, which is fixedly installed inside the fixed ring 5 and divides the inner cavity of the fixed ring 5 into an outer liquid storage chamber 15 and an inner liquid discharge chamber 16. The liquid storage chamber 15 is used to store liquid lubricating oil. A pressure ring 13 is installed inside the liquid storage chamber 15. The outer wall of the pressure ring 13 is slidably connected to the inner wall of the fixed ring 5. The pressure ring 13 can slide up and down axially in the liquid storage chamber 15. A rotating ring 18 is rotatably connected to the inner wall of the liquid discharge chamber 16. There is a gap between the inner wall of the rotating ring 18 and the steel strand 4. Multiple inclined holes 19 are provided on the rotating ring 18. The angle between the axis of the inclined hole 19 and the axis of the steel strand 4 is an acute angle, and the outlet end of the inclined hole 19 is lower than the inlet end, that is, the inclined hole 19 is set obliquely downward. One end of the inclined hole 19 is connected to the liquid discharge chamber 16, and the other end is connected to the inner wall surface of the rotating ring 18.

[0049] Specifically, when the lubricating oil enters the drain chamber 16, it flows through the inclined hole 19 to the inner wall of the rotating ring 18 under the action of gravity, and flows down along the surface of the steel strand 4. During the lifting and lowering of the steel strand 4, the lubricating oil is evenly coated on the outer surface of the steel strand 4.

[0050] Reference Figures 3-5 and Figure 14The oiling mechanism also includes two rotating shafts I7, which are rotatably connected to the top of the fixed ring 5 via a base. The two rotating shafts I7 are symmetrically arranged around the steel strand 4, with their axes perpendicular to the axis of the steel strand 4. A ratchet 8 is fixedly fitted onto the outer wall of each rotating shaft I7, and a drive ring 46 is fixedly fitted onto the outer wall of the steel strand 4. The outer wall of the drive ring 46 has a protrusion that matches the ratchet teeth of the ratchet 8. When the steel strand 4 moves upward, the drive teeth of the drive ring 46 engage the ratchet teeth of the ratchet 8, forcing the ratchet 8 to rotate. When the steel strand 4 moves upward under the drive of the hydraulic lifter, the ratchet teeth of the steel strand 4 mesh with the protrusion of the drive ring 46, thereby driving the ratchet 8 to rotate around the axis of the rotating shaft I7. A cam 9 is provided on each side of the ratchet 8, and the cam 9 is fixedly fitted onto the outer wall of the rotating shaft I7. The profile curve of the cam 9 is designed to have a protrusion and a retraction portion. Two sliding rods I10 are fixedly connected to the top of the ring 13. The top ends of the two sliding rods I10 slide through the top of the fixed ring 5 and are respectively fixed with a pressure plate 11. The pressure plate 11 is located below the cam 9. The outer peripheral surface of the cam 9 contacts and cooperates with the upper surface of the pressure plate 11. Two springs I12 are fixed between the bottom of the pressure plate 11 and the top of the fixed ring 5 through spring seats. The two springs I12 are respectively sleeved on the outer wall of the corresponding sliding rod I10. The springs I12 are used to apply an upward elastic force to the pressure plate 11, driving the pressure plate 11 to move upward and reset. Two U-shaped tubes 17 are fixedly inserted inside the annular plate 14. The U-shaped tubes 17 are used to connect the liquid storage chamber 15 and the liquid discharge chamber 16. The opening of the U-shaped tube 17 faces downward, that is, both ends of the U-shaped tube 17 are located at the bottom. The bottom end of the U-shaped tube 17 located in the liquid storage chamber 15 slides through the pressure ring 13 in a sealed manner, so that the U-shaped tube 17 always maintains a sealed cooperation with the pressure ring 13 during the up and down sliding process of the pressure ring 13.

[0051] Specifically, when the steel strand 4 moves upward to drive the steel structure roof 1 to rise as a whole, the steel strand 4 and the ratchet 8 engage to drive the ratchet 8 to rotate. The ratchet 8 drives the cam 9 to rotate. When the protrusion of the cam 9 rotates to the position of contacting the pressure plate 11, the cam 9 pushes the pressure plate 11 to move downward against the elastic force of the spring I 12. The pressure plate 11 drives the pressure ring 13 to move downward synchronously through the sliding rod I 10. When the pressure ring 13 moves downward, it squeezes the lubricating oil in the liquid storage chamber 15. The lubricating oil is pressed into the drain chamber 16 through the U-shaped tube 17 and then discharged through the inclined hole 19, coating the surface of the steel strand 4. After the protrusion of the cam 9 rotates past the pressure plate 11, the elastic force of the spring I 12 pushes the pressure plate 11 and the pressure ring 13 to move upward and reset.

[0052] Reference Figures 4-6To eliminate dead corners on the surface of the steel strand 4, the oiling mechanism also includes two vertical plates 20. The two vertical plates 20 are respectively fixed to the bottom of the corresponding pressure plate 11 on the side away from the sliding rod I 10. The vertical plates 20 move up and down synchronously with the pressure plate 11. Slider 21 is fixed on the side of the two vertical plates 20 that are away from each other. Two arc-shaped grooves 22 are provided on the inner wall of the rotating ring 18. The trajectory of the arc-shaped grooves 22 is a circular arc, and its center is located on the axis of the rotating ring 18. Each slider 21 extends into the corresponding arc-shaped groove 22. The outer wall of the slider 21 slides in cooperation with the inner wall of the arc-shaped groove 22.

[0053] Specifically, when the pressure plate 11 moves up and down reciprocally under the action of the cam 9 and the spring I 12, the pressure plate 11 drives the slider 21 to move up and down synchronously through the vertical plate 20. Since the arc groove 22 is set on the rotating ring 18 and the rotating ring 18 can rotate freely in the circumferential direction, the sliding of the slider 21 along the arc groove 22 will drive the rotating ring 18 to reciprocate around its own axis. The reciprocating rotation of the rotating ring 18 causes the spray direction of the inclined hole 19 to change periodically in the circumferential direction, so that the lubricating oil can be sprayed onto the circumferential surface of the steel strand 4 from different angles.

[0054] Reference Figure 3 and Figure 5 The top of both the pressure plate 11 and the vertical plate 20 is provided with a relief groove 23. The position of the relief groove 23 corresponds to the position of the ratchet 8. When the pressure plate 11 moves upward, the lower part of the ratchet 8 can enter the relief groove 23 to prevent the pressure plate 11 and the ratchet 8 from interfering with each other. The top of the fixed ring 5 is fixed with a protective cover 6. The protective cover 6 covers the rotating shaft I7, ratchet 8, cam 9, sliding rod I10, spring I12, vertical plate 20 and slider 21 and other components inside it. The protective cover 6 is used to prevent external dust, debris and other objects from entering these moving parts, and also plays a safety protection role.

[0055] Reference Figure 4 To facilitate the replenishment of air into the liquid storage chamber 15, a fixed tube 44 is fixedly inserted through the pressure ring 13. The fixed tube 44 is a hollow tube body, with its top end slidingly extending above the fixed ring 5. The bottom end of the fixed tube 44 opens onto the bottom surface of the pressure ring 13. A one-way valve 45 is installed inside the fixed tube 44. The one-way valve 45 allows gas to flow from the top of the pressure ring 13 to the bottom of the pressure ring 13, that is, outside air can enter the liquid storage chamber 15 through the one-way valve 45, while preventing the lubricating oil in the liquid storage chamber 15 from flowing out through the fixed tube 44.

[0056] Specifically, after the pressure ring 13 moves down and squeezes the lubricating oil into the drain chamber 16, the pressure plate 11 moves up and resets under the elastic force of the spring I 12. The pressure ring 13 drives the fixed tube 44 to move up synchronously. At this time, outside air enters the reservoir 15 through the one-way valve 45 to replenish the space occupied by the lubricating oil discharged by the pressure ring 13, so that the reservoir 15 maintains atmospheric pressure, which makes it easier for the pressure ring 13 to continue to squeeze the lubricating oil into the drain chamber 16 when it moves down again.

[0057] Reference Figure 1 and Figures 7-8 The self-balancing overall lifting system for the large-span steel structure roof also includes four bases 24 installed on the foundation. The four bases 24 are located at the four outer corners of the steel structure roof 1. Each base 24 has a rotatably connected winding roller 25. The axis of the winding roller 25 is horizontally positioned, and a guy rope 26 is wound around its outer wall. The guy rope 26 can be made of high-strength steel wire rope or synthetic fiber rope. The top of the guy rope 26 is fixedly connected to the bottom of the steel structure roof 1. The tops of the four guy ropes 26 are fixed at the four bottom corners of the steel structure roof 1. The guy ropes 26 extend from the winding roller 25 and diagonally connect to the steel structure roof 1. An anti-sway mechanism is provided on one side of each base 24 to suppress the swaying of the steel structure roof 1 under high-altitude wind forces. The anti-sway mechanism includes components fixed to one side of each base 24. The protective housing 27 is a sealed housing structure filled with silicone oil. A rotating shaft II 28 is rotatably connected inside the protective housing 27. One end of the rotating shaft II 28 is sealed and rotatably penetrates one side of the inner wall of the protective housing 27 and is fixedly connected to the shaft of the winding roller 25, so that the rotation of the winding roller 25 can be transmitted to the rotating shaft II 28 inside the protective housing 27. Multiple fixing plates 31 are fixed on the outer wall of the rotating shaft II 28, extending radially along the rotating shaft II 28. A sliding plate 32 is slidably connected to one side of the fixing plate 31, and the sliding plate 32 can slide radially along the fixing plate 31. Multiple through holes 34 are provided on both the fixing plate 31 and the sliding plate 32. The through holes 34 on the fixing plate 31 are connected to the through holes 34 on the sliding plate 32, and the silicone oil can flow inside the protective housing 27 through these through holes 34.

[0058] Reference Figures 8-11The anti-sway mechanism also includes a fixed plate I29 and two fixed plates II30 fixed to the outer wall of the rotating shaft II28. The two fixed plates II30 are respectively arranged on both sides of the fixed plate I29 and are coaxially fixedly connected to the rotating shaft II28. The fixed plates I29 and II30 together clamp the fixed plate 31 in the middle, so that the fixed plate 31 is firmly fixed to the rotating shaft II28. The outer edge of the fixed plate 31 and the inner wall of the protective box 27 are in a sliding seal fit, allowing only a small amount of silicone oil to leak from the fit gap. The hydraulic oil flows through the through hole. That is, there is a sealing fit between the outer edge of the fixed plate 31 and the inner wall of the protective box 27 to prevent silicone oil from leaking from the edge of the fixed plate 31. Two sliding plates are fixed to the top of the sliding plate 32. The top ends of the movable rod II 35 and the two sliding rods II 35 are sealed and slide to the interior of the corresponding fixed plate II 30. The fixed plate II 30 has a sliding hole inside, and the sliding rod II 35 slides in the sliding hole. The outer wall of the two sliding rods II 35 is fixedly fitted with a sliding seat 36. The sliding seat 36 is slidably set in the sliding hole of the corresponding fixed plate II 30. The outer wall of the sliding rod II 35 is fitted with a spring II 37. The top end of the spring II 37 is fixedly connected to the bottom of the sliding seat 36 through a spring seat, and the bottom end of the spring II 37 is fixedly connected to the bottom inner wall of the fixed plate II 30 through a spring seat. The spring II 37 is used to apply an elastic force to the sliding seat 36 toward the axis of the rotating shaft II 28, so that the sliding plate 32 is in a position close to the fixed plate 31 under normal conditions.

[0059] Specifically, when a sudden gust of wind at high altitude causes the steel structure roof 1 to sway, the guy rope 26 is quickly pulled by the steel structure roof 1, the winding roller 25 is instantly accelerated, and the rotating shaft II 28 rotates at high speed accordingly. The fixed plate 31 and the sliding plate 32 rotate at high speed with the rotating shaft II 28. Under the action of centrifugal force, the sliding plate 32 overcomes the elastic force of the spring II 37 and is thrown outward radially. After the sliding plate 32 moves outward, the through hole 34 on the sliding plate 32 is misaligned with the through hole 34 on the fixed plate 31, which reduces the space connecting the two adjacent through holes 34. The flow rate of silicone oil decreases. When the silicone oil passes through the reduced through hole 34, the flow resistance increases, converting the kinetic energy of the rotation of the fixed plate 31 and the sliding plate 32 into the heat energy of the silicone oil, thereby consuming the swaying kinetic energy of the steel structure roof 1. After the wind stops, the rotation speed of the winding roller 25 decreases, and the spring II 37 pushes the sliding rod II 35 and the sliding plate 32 to move and reset in the direction of the axis of the rotating shaft II 28. The through holes 34 are realigned, and the damping effect is released.

[0060] Reference Figure 11A counterweight 33 is fixed on the side of the sliding plate 32 away from the fixed plate 31. The counterweight 33 is used to increase the mass of the sliding plate 32. Since the sliding plate 32 needs to overcome the elastic force of the spring II 37 to slide outward, according to the centrifugal force formula, increasing the mass can enable the sliding plate 32 to generate a centrifugal force sufficient to overcome the elastic force at a lower speed, thereby sliding outward more sensitively and improving the response sensitivity of the anti-sway mechanism. A limiting ring 38 is fixedly sleeved on the outer wall of the sliding rod II 35. The limiting ring 38 is set on the outside of the fixed plate II 30. When the spring II 37 drives the sliding rod II 35 and the sliding plate 32 to move and reset to the middle, the limiting ring 38 contacts the outer wall of the fixed plate II 30 to limit the sliding rod II 35 and ensure that the sliding plate 32 and the through hole 34 on the fixed plate 31 can be accurately aligned.

[0061] Reference Figure 7 In order to dissipate the heat generated by the silicone oil inside the protective enclosure 27 in a timely manner, multiple heat dissipation fins are fixed on the outer wall of the protective enclosure 27. The heat dissipation fins are made of metal materials with good thermal conductivity, such as aluminum alloy or copper alloy. The heat dissipation fins are in the shape of sheets and are vertically fixed to the outer wall of the protective enclosure 27. Multiple heat dissipation fins are evenly arranged along the circumference of the protective enclosure 27. The heat dissipation fins are used to increase the heat dissipation area of ​​the protective enclosure 27 and improve the heat dissipation efficiency.

[0062] The controller is also electrically connected to the hydraulic lifters of the four lifting supports 2 respectively; the controller is used to send lifting control signals to the four hydraulic lifters synchronously to control the four hydraulic lifters to drive the corresponding steel strands 4 to move up and down synchronously.

[0063] Reference Figure 2 , Figure 12 and Figure 13The slide rail seat 3 is used to transfer the tension of the steel strand 4 to the steel structure roof 1, while allowing the steel structure roof 1 to have a certain displacement in the horizontal direction. The top of the slide rail seat 3 is provided with a wedge-shaped groove 39, which is opened in the horizontal direction and has a wedge-shaped cross-section, that is, the width of the bottom of the groove is greater than the width of the opening. A wedge-shaped block 40 is slidably connected in the wedge-shaped groove 39. The shape of the wedge-shaped block 40 is adapted to the wedge-shaped groove 39. The wedge-shaped block 40 can only slide along the length direction of the wedge-shaped groove 39. The bottom end of the steel strand 4 is fixedly connected to the top of the wedge-shaped block 40. A crossbar 41 is fixed in the wedge-shaped groove 39. The crossbar 41 is set along the length direction of the wedge-shaped groove 39. One end of the crossbar 41 slides through the wedge-shaped block 40. The crossbar 41 provides guidance for the sliding of the wedge-shaped block 40. A helical spring 4 is fixed on both sides of the wedge-shaped block 40. 2. The end of the helical spring 42 away from the wedge block 40 is fixedly connected to the inner wall of one side of the wedge groove 39. The helical spring 42 is sleeved on the outer wall of the crossbar 41. The helical spring 42 is used to provide elastic force to the wedge block 40 (the helical spring 42 is a rectangular cross-section helical compression spring with high fatigue life, and the fatigue test and replacement of the helical spring 42 are required regularly according to the construction conditions). This keeps the wedge block 40 in the middle position of the wedge groove 39 when there is no external force. Corrugated protective covers 43 are fixed on the inner walls of the two sides of the wedge groove 39 that are far apart from each other. The ends of the two corrugated protective covers 43 that are close to each other are fixedly connected to the two sides of the wedge block 40 respectively. This is used to cover the opening of the wedge groove 39 to prevent dust, sand and other impurities from entering the interior of the wedge groove 39 and to ensure the smooth sliding of the wedge block 40. Both sides of the wedge block 40 are also fixed with dampers arranged parallel to the crossbar 41. The other end of the damper is fixedly connected to the inner wall of the wedge groove 39 to help absorb impact energy and provide reverse damping force for the helical spring 42.

[0064] Specifically, in environments with large temperature differences, such as deserts, when the steel structure roof 1 undergoes horizontal thermal expansion due to exposure to the sun during the day, the thermal expansion force is transmitted to the wedge block 40 through the steel strand 4, causing the wedge block 40 to slide laterally within the wedge groove 39, compressing the helical spring 42 on one side, thereby releasing the expansion stress. When the temperature drops at night and the steel structure roof 1 contracts, the elastic potential energy stored in the compressed helical spring 42 is released, pushing the wedge block 40 to move in the opposite direction and return to its initial position.

[0065] The construction method for this large-span steel structure roof self-balancing integral lifting system is as follows:

[0066] When the lifting operation begins, the hydraulic lifters in the four lifting supports 2 start synchronously. The lifting cylinders inside the hydraulic lifters extend and retract, and with the alternating locking and unlocking of the upper and lower anchor clamps, the steel strand 4 is driven to move upward. The steel strand 4 is fixedly connected to the steel structure roof 1 through the slide rail seat 3. Therefore, the upward movement of the steel strand 4 drives the steel structure roof 1 to rise steadily as a whole.

[0067] As the steel strand 4 moves upward, its surface contacts the ratchet teeth of the ratchet 8. Due to the upward movement of the steel strand 4, it engages with the ratchet teeth via the protrusion of the drive ring 46, thereby driving the ratchet 8 to rotate around the axis of the rotating shaft I7. The rotation of the ratchet 8 causes the coaxial cam 9 to rotate synchronously. The profile of the cam 9 is a non-circular curve with a protrusion. When the protrusion of the cam 9 rotates to a position facing the pressure plate 11, the protrusion pushes the pressure plate 11 downward. The pressure plate 11 transmits the downward displacement to the pressure ring 13 via the sliding rod I10. The pressure ring 13 slides downward in the liquid storage chamber 15. At this time, the pressure ring 13 compresses the lubricating oil in the liquid storage chamber 15, causing the lubricating oil pressure to rise. Since the inlet of the U-shaped tube 17 is located at the bottom of the liquid storage chamber 15 and passes through the pressure ring 13, the high-pressure lubricating oil enters the drain chamber 16 through the U-shaped tube 17. Under the action of pressure, the lubricating oil in the drain chamber 16 is sprayed out through the inclined hole 19 provided on the rotating ring 18. Since the inclined hole 19 is set at an angle downward, the sprayed lubricating oil flows downward along the surface of the steel strand 4 under the action of gravity, coating the entire circumferential surface of the steel strand 4.

[0068] At the same time, when the pressure plate 11 moves downward, it drives the vertical plate 20 and the slider 21 to move downward. The slider 21 slides in the arc groove 22, driving the rotating ring 18 to rotate around its own axis in one direction. When the pressure plate 11 moves upward, it drives the rotating ring 18 to rotate in the opposite direction. The reciprocating rotation of the rotating ring 18 causes the spray direction of the inclined hole 19 to change continuously in the circumferential direction, so that the lubricating oil can cover the entire circumferential surface of the steel strand 4 and eliminate the dead corners of the coating.

[0069] During the lifting process of the steel structure roof 1, when gusts of wind occur at high altitudes, the steel structure roof 1 sways horizontally under the action of the wind. The swaying of the steel structure roof 1 is transmitted to the winding roller 25 through the guy rope 26, causing the winding roller 25 to accelerate. The rotation of the winding roller 25 is transmitted to the rotating shaft II 28 of the anti-sway mechanism through the rotating shaft, causing the fixed plate 31 and the sliding plate 32 to rotate with the rotating shaft II 28. When the wind force is large and the rotation speed of the winding roller 25 is high, the sliding plate 32 overcomes the elastic force of the spring II 37 under the action of centrifugal force and moves radially. Sliding outwards causes the through holes 34 on the fixed plate 31 and the sliding plate 32 to be misaligned, reducing the effective flow area of ​​the through holes 34. When the silicone oil in the protective box 27 passes through the reduced through holes 34, the flow resistance increases sharply, converting the rotational kinetic energy of the fixed plate 31 and the sliding plate 32 into the internal energy of the silicone oil, i.e., heat energy, thereby consuming the swing energy of the steel structure roof 1. After the wind stops, the speed of the winding roller 25 decreases, the centrifugal force decreases, the spring II 37 pushes the sliding plate 32 to reset, the through holes 34 are realigned, and the damping is automatically released.

[0070] Furthermore, in environments with large temperature differences, such as deserts, the steel structure roof 1 undergoes horizontal thermal expansion and contraction due to temperature changes. When the temperature rises, the steel structure roof 1 expands horizontally, causing the slide rail seat 3 to move horizontally in sync. The wedge block 40 at the bottom of the steel strand 4 remains relatively fixed in position, allowing the wedge block 40 to slide relative to the wedge groove 39, compressing the helical spring 42 on one side and converting the thermal expansion stress into the elastic potential energy of the helical spring 42, thus avoiding stress concentration. When the temperature drops, the helical spring 42 releases its elastic potential energy, pushing the wedge block 40 back to its original position and causing the steel structure roof 1 to contract.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A self-balancing overall lifting system for a large-span steel structure roof, comprising lifting supports (2) installed at the four corners of the steel structure roof (1) to be lifted, wherein steel strands (4) are threaded through the diagonal braces of the four lifting supports (2), characterized in that, The bottom end of the steel strand (4) is connected to a slide rail seat (3) fixed on the steel structure roof (1). The steel strand (4) is driven to rise and fall by a hydraulic lifter in the lifting bracket (2), thereby controlling the rise and fall of the steel structure roof (1). Bases (24) are fixedly installed on the foundation below the four corners of the steel structure roof (1). The bases (24) are rotatably connected to the winding rollers (25) with guy ropes (26) wound on the outer wall. The top of the guy ropes (26) is fixedly connected to the four corners of the bottom of the steel structure roof (1). An anti-sway mechanism adapted to the winding rollers (25) is provided on one side of the base (24). The anti-sway mechanism includes a protective box (27) fixed on one side of the base (24), a rotating shaft II (28) rotating in the protective box (27), multiple fixed plates (31) fixed on the outer wall of the rotating shaft II (28), and a slide rail seat (31). A sliding plate (32) is mounted on one side of the fixed plate (31), and multiple through holes (34) are evenly opened on the fixed plate (31) and the sliding plate (32). The outer wall of the rotating shaft II (28) is fixedly installed with a fixed plate I (29) and two fixed plates II (30) that penetrate the fixed plate (31). The outer edge of the fixed plate (31) and the inner wall of the protective box (27) are in a sliding seal fit, allowing a small amount of silicone oil to leak from the fit gap. The hydraulic oil flows through the through hole (34). Two sliding rods II (35) are fixed on the side of the sliding plate (32) near the fixed plate II (30). The top of the two sliding rods II (35) are sealed and slide to the corresponding fixed plate II (30). The outer wall of the two sliding rods II (35) is fixedly fitted with a sliding seat (36), and the outer wall of the sliding rods II (35) is fitted with a spring II (37).

2. The self-balancing overall lifting system for a large-span steel structure roof according to claim 1, characterized in that, The bottom of the inclined support of the lifting bracket (2) is fixedly connected to a fixed ring (5) by a steel strand. The steel strand (4) passes through the fixed ring (5). The fixed ring (5) is provided with an oiling mechanism for automatically applying lubricating oil to the steel strand (4). The oiling mechanism includes an annular plate (14) fixed in the fixed ring (5). The fixed ring (5) is divided into a liquid storage chamber (15) and a liquid discharge chamber (16) by the annular plate (14). A pressure ring (13) is sealed and slidably connected in the liquid storage chamber (15). A rotating ring (18) is sealed and rotatably connected to the inner wall of the liquid discharge chamber (16). The rotating ring (18) is provided with multiple inclined holes (19) that communicate with the liquid discharge chamber (16).

3. The self-balancing overall lifting system for a large-span steel structure roof according to claim 2, characterized in that, The oiling mechanism also includes two rotating shafts I (7) that rotate on the top of the fixed ring (5) via the base. The two rotating shafts I (7) are symmetrically arranged with the steel strand (4) as the center. The outer walls of the two rotating shafts I (7) are fixedly fitted with ratchet gears (8). The outer walls of the steel strand (4) are fixedly fitted with drive rings (46). The outer walls of the drive rings (46) are provided with protrusions that are adapted to the ratchet teeth of the ratchet gears (8). When the steel strand (4) moves upward under the action of the hydraulic lifter in the lifting bracket (2), the ratchet gears (8) are driven to rotate by meshing with the protrusions of the drive rings (46). The ratchet gears (8) are provided with cams (9) on both sides, and the cams (9) are fixedly fitted on the outer walls of the rotating shafts I (7). The top of the pressure ring (13) is fixed with two sliding rods I (10). The tops of the two sliding rods I (10) slide to the fixed ring (5). Above each is a pressure plate (11), and a cam (9) cooperates with the pressure plate (11) to drive the pressure plate (11) to move down when the cam (9) rotates. The bottom of the pressure plate (11) and the top of the fixed ring (5) are fixed with two springs I (12) through spring seats, and the two springs I (12) are respectively sleeved on the outer wall of the corresponding sliding rod I (10) to drive the pressure plate (11) to move up and reset. Two U-shaped tubes (17) are fixedly inserted in the annular plate (14). The liquid storage chamber (15) and the liquid discharge chamber (16) are connected through the U-shaped tubes (17). The opening of the U-shaped tubes (17) faces down. The bottom end of the U-shaped tubes (17) located in the liquid storage chamber (15) is sealed and slides through the pressure ring (13) to discharge the lubricating oil in the liquid storage chamber (15) into the liquid discharge chamber (16) through the U-shaped tubes (17) when the pressure ring (13) moves down.

4. The self-balancing integral lifting system for a large-span steel structure roof according to claim 3, characterized in that, The oiling mechanism also includes two vertical plates (20), which are fixed to the bottom of the corresponding pressure plate (11) on the side away from the sliding rod I (10). The two vertical plates (20) are fixed with sliders (21) on the side away from each other. The inner wall of the rotating ring (18) is provided with two arc grooves (22). The sliders (21) extend into the arc grooves (22) and slide in cooperation with the arc grooves (22).

5. The self-balancing integral lifting system for a large-span steel structure roof according to claim 4, characterized in that, The top of the pressure plate (11) and the vertical plate (20) are provided with a relief groove (23) for the ratchet (8) to make room. The top of the fixing ring (5) is fixed with a protective cover (6), and the rotating shaft I (7), ratchet (8), cam (9), sliding rod I (10), spring I (12), vertical plate (20) and slider (21) are all set inside the protective cover (6).

6. The self-balancing integral lifting system for a large-span steel structure roof according to claim 4, characterized in that, A fixed tube (44) is fixedly inserted inside the pressure ring (13). The top end of the fixed tube (44) slides and extends above the fixed ring (5). A one-way valve (45) is provided inside the fixed tube (44).

7. The self-balancing overall lifting system for a large-span steel structure roof according to claim 4, characterized in that, A counterweight (33) is fixed on the side of the sliding plate (32) away from the fixed plate (31), and a limiting ring (38) is fixedly sleeved on the outer wall of the sliding rod II (35), and the limiting ring (38) is located on the outside of the fixed plate II (30).

8. The self-balancing integral lifting system for a large-span steel structure roof according to claim 4, characterized in that, The outer wall of the protective box (27) is fixed with multiple heat dissipation fins for dissipating heat from the silicone oil inside the protective box (27).

9. The self-balancing integral lifting system for large-span steel structure roofs according to any one of claims 4 to 8, characterized in that, The top of the slide rail seat (3) is provided with a wedge groove (39), and a wedge block (40) is slidably connected in the wedge groove (39). The bottom end of the steel strand (4) is fixedly connected to the top of the wedge block (40). A crossbar (41) is fixed in the wedge groove (39). One end of the crossbar (41) slides through the wedge block (40). Both sides of the wedge block (40) are fixed with a spiral spring (42) sleeved on the outer wall of the crossbar (41). Corrugated protective covers (43) are fixed on the inner walls of the two sides of the wedge groove (39) that are far apart from each other. The ends of the two corrugated protective covers (43) that are close to each other are fixedly connected to the two sides of the wedge block (40).

10. A construction method based on the self-balancing integral lifting system for a large-span steel structure roof as described in claim 9, characterized in that, Includes the following steps: S1. When the lifting operation begins, the hydraulic lifters in the four lifting supports (2) start synchronously. The lifting cylinders inside the hydraulic lifters extend and retract, driving the steel strands (4) to move upward. The steel strands (4) are fixedly connected to the steel structure roof (1) through the slide rail seat (3). The upward movement of the steel strands (4) causes the steel structure roof (1) to rise as a whole. S2. When the steel strand (4) moves upward, the surface of the steel strand (4) contacts the ratchet teeth of the ratchet gear (8). The steel strand (4) and the ratchet teeth are driven to rotate by the protrusion of the drive ring (46). The protrusion of the cam (9) rotates and pushes the pressure plate (11) downward. The pressure plate (11) transmits the downward displacement to the pressure ring (13) through the sliding rod I (10), so that the pressure ring (13) slides downward in the liquid storage chamber (15). The pressure ring (13) compresses the lubricating oil in the liquid storage chamber (15). The compressed lubricating oil enters the drain chamber (16) through the U-shaped tube (17). The lubricating oil is sprayed out through the inclined hole (19). The sprayed lubricating oil flows downward along the surface of the steel strand (4) and coats the surface of the steel strand (4). S3. When the pressure plate (11) moves downward, it drives the vertical plate (20) and the slider (21) to move downward. The slider (21) slides in the arc groove (22) and drives the rotating ring (18) to rotate around its own axis in one direction. When the pressure plate (11) moves upward, it drives the rotating ring (18) to rotate in the opposite direction. The reciprocating rotation of the rotating ring (18) causes the spray direction of the inclined hole (19) to change in the circumferential direction. S4. During the lifting process of the steel structure roof (1), the steel structure roof (1) swings horizontally under the action of wind. The swing of the steel structure roof (1) is transmitted to the winding roller (25) through the guy rope (26), causing the winding roller (25) to accelerate. The winding roller (25) drives the rotating shaft II (28) to rotate, causing the fixed plate (31) and the sliding plate (32) to rotate with the rotating shaft II (28). Under the action of centrifugal force, the sliding plate (32) overcomes the spring II (37). The elastic force slides outward radially, causing the through holes (34) on the fixed plate (31) and the sliding plate (32) to be misaligned. The effective flow area of ​​the through holes (34) is reduced. When the silicone oil in the protective box (27) passes through the reduced through holes (34), it converts the rotational kinetic energy of the fixed plate (31) and the sliding plate (32) into the internal energy of the silicone oil. After the wind stops, the speed of the winding roller (25) decreases, and the spring II (37) pushes the sliding plate (32) to reset, and the through holes (34) are realigned. S5. The steel structure roof (1) undergoes horizontal thermal expansion and contraction due to temperature changes. When the temperature rises, the steel structure roof (1) expands horizontally, causing the slide rail seat (3) to move horizontally in sync. The wedge block (40) at the bottom of the steel strand (4) remains relatively fixed, causing the wedge block (40) to slide relative to the wedge groove (39), compressing the helical spring (42) on one side. When the temperature drops, the helical spring (42) pushes the wedge block (40) back to its original position, causing the steel structure roof (1) to contract.

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