A safe lifting device for steel structure engineering construction

Abstract

This invention belongs to the technical field of lifting devices, specifically mentioning a safe lifting device for steel structure construction. It includes a supporting plate, with symmetrical first connecting seats hinged to the supporting plate. A first telescopic rod is fixed to the first connecting seat, and a second connecting seat is fixed to the telescopic end of the first telescopic rod. A fixing rod is hinged to the second connecting seat, and a hook is hinged to the fixing rod. Symmetrical connecting ropes are fixed to a sliding frame, and the symmetrical connecting ropes are collectively fixed to a square plate. Four L-shaped connecting plates are slidably connected to the square plate, and the L-shaped connecting plates located on the same side of the H-beam are collectively fixed to a support plate. This invention, through the cooperation of the hook and lifting lugs, and by utilizing the support plate to provide partial upward support to the H-beam, reduces the tensile force at the welded joint between the lifting lugs and the H-beam, further improving the safety of the H-beam during lifting.

Description

Technical Field

[0001] This invention relates to the field of lifting device technology, and in particular to a safe lifting device for steel structure engineering construction. Background Technology

[0002] Steel structure construction refers to the construction process of using I-beams as the main material in the frame and support structure of building projects. Due to its high strength, light weight, fast construction speed and good seismic performance, it is widely used in modern buildings, bridges, industrial plants and other fields.

[0003] During construction, it is necessary to construct the supporting structure within the steel structure. The I-beams used for this supporting structure are typically equipped with lifting lugs welded to their upper sides at the factory, and auxiliary hanging plates welded to the upper sides of both ends. These auxiliary hanging plates work in conjunction with the brackets on the columns to adjust the height of the I-beam between the two columns. Existing lifting devices can only lift the I-beam by hooking the lifting lugs with hooks. If the weld between the lifting lugs and the I-beam becomes loose during lifting, the existing simple lifting method cannot provide immediate protection for the I-beam in mid-air, causing it to fall and potentially leading to a serious construction accident. Summary of the Invention

[0004] In order to overcome the shortcomings of the simple fixed structure of existing hoisting devices, the present invention provides a safe hoisting device for steel structure engineering construction.

[0005] The technical solution of this invention is: a safe lifting device for steel structure construction, comprising a supporting plate, wherein the supporting plate is hinged to symmetrical first connecting seats, the first connecting seats are fixedly connected to a first telescopic rod, the first telescopic rod is filled with hydraulic oil, the telescopic end of the first telescopic rod is fixedly connected to a second connecting seat, symmetrical first elastic elements are fixedly connected between the first telescopic rod and the adjacent second connecting seat, the end of the second connecting seat away from the first connecting seat is hinged to a fixed rod via a pivot, the fixed rod is slidably connected to a sliding frame, and the fixed rod is fixedly connected to a first fixing plate, the first fixing plate being connected to an adjacent... A second elastic element is fixedly connected between the sliding frames. A hook is hinged to the end of the fixed rod away from the second connecting seat. Symmetrical connecting ropes are fixedly connected to the sliding frames. A square plate is fixedly connected to the symmetrical connecting ropes together. Four L-connecting plates are slidably connected to the square plate through mounting seats. The L-connecting plates located on the same side of the I-beam are fixedly connected to a support plate. The support plate is used to support the I-beam. A second telescopic rod is fixedly connected to each of the four mounting seats of the square plate. The telescopic end of the second telescopic rod is fixedly connected to the adjacent L-connecting plate. An oil guide pipe is connected between the first telescopic rod and the four adjacent second telescopic rods.

[0006] Furthermore, the supporting plate, the first connecting seat, and the hook are located on the same straight line to keep the first telescopic rod in a vertically extended state.

[0007] Furthermore, a through hole is provided in the middle of the square plate, which is used to cooperate with the lifting lug of the I-beam for positioning the square plate.

[0008] Furthermore, the sum of the elastic forces of adjacent first elastic elements is greater than the weight of all parts on the first telescopic rod, which is used to ensure that the telescopic end of the first telescopic rod is in a retracted state.

[0009] Furthermore, it also includes a clamping support mechanism, which is disposed on both sides of the square plate. The clamping support mechanism is used to apply shearing force to the I-beam. The clamping support mechanism includes symmetrical third telescopic rods, each of which is fixed to the first fixed plate via a mounting plate. The third telescopic rods are filled with hydraulic oil. The telescopic ends of the third telescopic rods pass through the adjacent sliding frames. Limiting plates are fixed to the top and middle of the telescopic portion of the third telescopic rods. The limiting plates on the telescopic portion of the third telescopic rods cooperate with the adjacent sliding frames for limiting. The support plate is fixedly connected to a support seat, and the support seat is rotatably connected to a rotating plate via a rotating shaft. Symmetrical fixed columns are fixedly connected to the rotating plate on the support seat. The middle part of the fixed column is a rigid steel column, and the outer side of the fixed column is wrapped with a layer of friction rubber. A rotating plate is fixedly connected to the rotating shaft of the rotating plate on the support seat. The rotating plate is provided with a through groove. The support plate is fixedly connected to a fourth telescopic rod via a mounting seat. The telescopic end of the fourth telescopic rod is slidably engaged with the same side of the adjacent rotating plate via a connecting shaft. The symmetrical fourth telescopic rods are respectively connected to the symmetrical third telescopic rods by oil guide pipes.

[0010] Furthermore, it also includes an anti-slip mechanism, which is disposed on both sides of the square plate. The anti-slip mechanism is used to prevent the H-beam from tilting and slipping during hoisting. The anti-slip mechanism includes symmetrical sliding rods, with guide grooves on the upper side of the sliding rods. A fixing block is provided at the bottom of the support plate. The sliding rods are slidably connected to the fixing blocks at the bottom of the adjacent support plates through the guide grooves on the sliding rods. The sliding rods are limited in engagement with the fixing blocks on the adjacent support plates. A connecting frame is fixed to the sliding rods. A one-way rotating wheel is installed on the connecting frame. A torsion spring is fixed between the one-way rotating wheel and the adjacent connecting frame. A limit hook is fixed to the one-way rotating wheel. The limit hook is used to limit the side of the H-beam. A limit assembly is provided between the support plate and the adjacent rotating plate. The limit assembly is used to limit the adjacent sliding rods.

[0011] Furthermore, the sliding rods on both sides of the I-beam are at different heights to ensure that the limiting hooks on both sides of the I-beam are in contact with the vertical part of the I-beam simultaneously.

[0012] Furthermore, the width of the notch at the limiting hook is greater than the thickness of the vertical part of the I-beam, in order to ensure that the limiting hook is limited to the vertical part of the I-beam.

[0013] Furthermore, the limiting component includes a second fixing plate, which is fixedly connected to an adjacent support plate. A mounting plate is fixedly connected to the end of the sliding rod away from the limiting hook. The second fixing plate engages with the adjacent limiting hook. A third elastic element is fixedly connected between the second fixing plate and the mounting plate on the adjacent sliding rod. A first limiting post is slidably connected to the second fixing plate. A mounting plate is fixedly connected to the end of the first limiting post away from the sliding rod. A fourth elastic element is fixedly connected between the mounting plate of the first limiting post and the second fixing plate. The sliding rod has a blind hole, and the first limiting post engages with the blind hole of the adjacent sliding rod. A mounting plate is fixedly connected to the middle of the first limiting post. The mounting plate at the middle of the first limiting post is in a limiting engagement with the adjacent second fixing plate. The mounting plate at the end of the first limiting post is fixedly connected to a limiting frame. The support plate is fixedly connected to a third fixing plate. Both the limiting frame and the third fixing plate are provided with through holes. A second limiting post is provided in both the through hole of the limiting frame and the through hole of the adjacent third fixing plate. The second limiting post is in a limiting engagement with both the adjacent limiting frame and the third fixing plate. The end of the second limiting post away from the limiting frame is fixedly connected to a mounting plate. A limiting connecting plate is fixedly connected to the side of the rotating plate near the adjacent second limiting post. The limiting connecting plate is provided with a through hole. The second limiting post is located in the through hole of the adjacent limiting connecting plate.

[0014] Furthermore, the diameter of the through hole of the limiting connecting plate is larger than the diameter of the second limiting post, and the diameter of the through hole of the limiting connecting plate is smaller than the diameter of the end mounting plate of the second limiting post. The limiting connecting plate and the end mounting plate of the second limiting post are in a limiting fit to drive the second limiting post to be taken out from the through hole of the adjacent limiting frame and the third fixing plate.

[0015] The beneficial effects are as follows: 1. By using the hook and the lug to cooperate, and at the same time using the support plate to provide part of the upward support force for the I-beam, the tensile force on the weld between the lug and the I-beam is reduced, which further improves the safety of the I-beam during the hoisting process; by using two support plates to support the I-beam, the risk of the I-beam falling due to the weak weld between the lug and the I-beam is avoided, and the probability of construction accidents is reduced.

[0016] 2. This invention utilizes two adjacent fixed columns to compress the I-beam and apply shear force to the I-beam, thereby increasing the fixing strength of the I-beam and preventing the I-beam from slipping on the support plate after a break occurs at the connection between the lifting lug and the I-beam, which would cause the I-beam to lose its balance in the air.

[0017] 3. This invention utilizes a limiting hook to apply support force to the outer end of the I-beam, preventing the I-beam from slipping and causing construction accidents. Furthermore, during normal hoisting, the limiting hook will not pop out to block the connection between the I-beam and the corbel on the column. It will only pop out when the weld between the lifting lug and the I-beam breaks, further improving the practicality of this invention. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the first telescopic rod and the second connecting seat, etc., of the present invention;

[0020] Figure 3 This is a side perspective three-dimensional structural diagram of the sliding frame and the first fixed plate of the present invention;

[0021] Figure 4 This is a top-view three-dimensional structural diagram of the square plate and support plate and other parts of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the first fixing plate and the third telescopic rod, etc., of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the fixed column and the fourth telescopic rod of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the sliding rod and the second fixing plate of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the limiting hook and the second fixing plate of the present invention;

[0026] Figure 9 This is a cross-sectional three-dimensional structural schematic diagram of the sliding rod of the present invention;

[0027] Figure 10 This is a three-dimensional structural diagram of the second limiting post and the limiting connecting plate of the present invention.

[0028] Component names and numbers in the diagram: 1-Supporting plate, 2-First connecting seat, 3-First telescopic rod, 4-Second connecting seat, 401-First elastic element, 5-Fixing rod, 6-Sliding frame, 7-First fixing plate, 8-Second elastic element, 9-Hook, 10-Connecting rope, 11-Square plate, 12-L-connecting plate, 13-Supporting plate, 14-Second telescopic rod, 15-Third telescopic rod, 16-Supporting seat, 17-Fixing column, 18-Rotating plate, 19-Fourth telescopic rod, 20-Sliding rod, 21-Connecting frame, 22-One-way rotating wheel, 23-Limiting hook, 24-Second fixing plate, 241-Third elastic element, 25-First limiting column, 26-Fourth elastic element, 27-Limiting frame, 28-Third fixing plate, 29-Second limiting column, 30-Limiting connecting plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0030] Research revealed that to facilitate the hoisting of I-beams, lifting lugs need to be welded onto the I-beams before they leave the factory. However, these lugs are not integral, and during transport, it's impossible to determine whether the lugs will be subjected to external impacts. Furthermore, the connection strength between the lugs and the I-beam is difficult to assess visually, and existing hoisting devices only hold the lugs with hooks. If the welded connection between the lugs and the I-beam fails, the I-beam may fall, causing a construction accident. The following implementation method is adopted to solve these problems.

[0031] Example 1: A safety lifting device for steel structure construction, such as... Figures 1-4As shown, the device includes a supporting hanging plate 1, with two symmetrical first connecting seats 2 hinged to the supporting hanging plate 1. A first telescopic rod 3 is fixed to the lower side of the first connecting seat 2. The first telescopic rod 3 is a conventional hydraulic telescopic rod, and its internal structure is not shown in the attached drawing. The first telescopic rod 3 is filled with hydraulic oil. A second connecting seat 4 is fixed to the telescopic end of the first telescopic rod 3. Symmetrical first elastic elements 401 are fixed between the first telescopic rod 3 and the adjacent second connecting seat 4. The first elastic elements 401 are set as tension springs. The sum of the elastic forces of adjacent first elastic elements 401 is greater than the weight of all parts on the first telescopic rod 3, which is used to ensure the first telescopic... The telescopic end of rod 3 is in the retracted state. Initially, the telescopic end of the first telescopic rod 3 is in the retracted state. The lower end of the second connecting seat 4 is hinged to a fixed rod 5 via a pivot. The fixed rod 5 is slidably connected to a sliding frame 6. The fixed rod 5 is fixedly connected to a first fixed plate 7, which is located below the adjacent sliding frame 6. A second elastic element 8 is fixedly connected between the first fixed plate 7 and the adjacent sliding frame 6. The second elastic element 8 is a spring and is sleeved on the adjacent fixed rod 5. The lower end of the fixed rod 5 is hinged to a hook 9, which is used to hook the lifting lug on the I-beam. The sliding frame 6 is fixedly connected to two symmetrical connecting ropes 10. A square plate 11 is fixedly connected to the connecting rope 10. During the process of the hook 9 hooking the lifting lug, the square plate 11 adheres to the upper side of the I-beam. A through hole is provided in the middle of the square plate 11, which is used to engage with the lifting lug of the I-beam for positioning. Four L-shaped connecting plates 12 are slidably connected to the square plate 11 via mounting bases. Two L-shaped connecting plates 12 located on the same side of the I-beam are fixedly connected to support plates 13. Adjacent support plates 13 support the I-beam, providing partial support and reducing the tension between the hook 9 and the lifting lug. The four mounting bases of the square plate 11... A second telescopic rod 14 is fixedly connected to the base. The second telescopic rod 14 is an existing ordinary hydraulic telescopic rod. Its internal structure is not shown in the attached drawings. The telescopic end of the second telescopic rod 14 is fixedly connected to the adjacent L connecting plate 12. The telescopic end of the second telescopic rod 14 is used to change the position of the support plate 13 on the same side. The first telescopic rod 3 is connected to the four adjacent second telescopic rods 14 by oil guide pipes. When the telescopic end of the first telescopic rod 3 extends, the telescopic ends of the four second telescopic rods 14 retract inward. The support plate 1, the first connecting seat 2 and the hook 9 are located on the same straight line to keep the first telescopic rod 3 in a vertically extended state.

[0032] When the I-beam leaves the factory, two lifting lugs and two auxiliary hanging plates are welded to the upper side of the I-beam. The two auxiliary hanging plates are located at both ends of the I-beam (e.g., Figure 1As shown in the diagram, during installation, two auxiliary hanging plates cooperate with the corbels (horizontal connection points) on the steel column to correct the position of the I-beam. When hoisting the I-beam, the support hanging plate 1 is lowered first, so that the two square plates 11 gradually contact the upper side of the I-beam. Then, with the assistance of the workers, the lifting lugs are passed through the through holes in the middle of the adjacent support hanging plates 1. At the same time, the workers hook the hooks 9 into the through holes of the adjacent lifting lugs. After both hooks 9 are engaged with the adjacent lifting lugs, the support hanging plate 1 is then raised. The following describes the specific lifting device on the left side of the support hanging plate 1 as an example:

[0033] The supporting plate 1 drives the first connecting seat 2 to move upward. Under the gravity of the I-beam, the gravity of the I-beam acts on the hook 9 and the fixed rod 5. As the supporting plate 1 gradually moves upward, the telescopic end of the first telescopic rod 3 extends outward, and at the same time, the two first elastic elements 401 are stretched. At this time, the square plate 11 is in contact with the upper side of the I-beam. During the process of the telescopic end of the first telescopic rod 3 extending outward, the hydraulic oil in the first telescopic rod 3 flows into the four second telescopic rods 14 along the four oil guide pipes. The telescopic ends of the four second telescopic rods 14 contract simultaneously, and the second telescopic rods 14 drive... The adjacent L-connecting plates 12 slide along the adjacent mounting seats on the square plate 11. All four L-connecting plates 12 move closer to the I-beam. The two support plates 13 on the front and rear sides also move closer to the I-beam. When the telescopic end of the first telescopic rod 3 is fully extended, the two support plates 13 move to the lower side of the horizontal part on the upper side of the I-beam. The support hanging plate 1 continues to move upward. The tension of the first telescopic rod 3 is directly applied to the fixed rod 5 through the second connecting seat 4. The fixed rod 5 drives the hook 9 to move upward. The hook 9 directly applies the tension to the lifting lug of the I-beam. At this time, the I-beam slowly leaves the ground.

[0034] As the I-beam begins to leave the ground, the fixing rod 5 drives the first fixing plate 7 to move upward synchronously. Initially, the second elastic element 8 is not compressed. As the first fixing plate 7 moves upward, the telescopic end of the first telescopic rod 3 extends outward, and the two support plates 13 move to the lower side of the horizontal part on the upper side of the I-beam. As the fixing rod 5 drives the first fixing plate 7 to move upward, under the limiting action of the two adjacent support plates 13 and the I-beam, the first fixing plate 7 presses the second elastic element 8 upward. The elastic force of the second elastic element 8 acts on the lower side of the sliding frame 6, and the two connecting ropes 10 are gradually taut. At this time, the second elastic element 8 is not completely compressed. After the two connecting ropes 10 are taut, the two support plates 13 also press on the I-beam, providing some upward support force for the I-beam. Through the cooperation of the hook 9 and the lifting lug, and with the support plates 13 providing some upward support force for the I-beam, the tension at the welded joint between the lifting lug and the I-beam is reduced, further improving the safety of the I-beam during hoisting.

[0035] During the hoisting of the I-beam, if the weld between the lifting lug and the I-beam breaks, the lifting lug separates from the I-beam. At this time, the hook 9 loses its pulling force on the I-beam. Under the weight of the I-beam, the I-beam pulls the square plate 11 downward through the two support plates 13. The square plate 11 pulls the sliding frame 6 downward through the two connecting ropes 10. The sliding frame 6 slides downward along the fixed rod 5 until the second elastic element 8 is fully compressed. During the compression of the second elastic element 8, part of the impact force of the falling I-beam is buffered, preventing the impact force generated by the falling I-beam from causing the connecting rope 10 to break. The two support plates 13 support the I-beam, avoiding the risk of the I-beam falling due to the weak weld between the lifting lug and the I-beam, and reducing the probability of construction accidents. When the lifting lug loses contact with the I-beam, the I-beam needs to be transferred to the ground in time.

[0036] After the I-beam is hoisted to the designated position, the auxiliary hanging plates on the left and right sides of the I-beam contact the upper side of the adjacent column brackets. Then, the workers begin to install the I-beam onto the column brackets using bolts and mounting parts, and weld the I-beam and brackets. After welding, the support hanging plate 1 continues to move downward. Under the tension of the two first elastic elements 401, the first connecting seat 2 gradually moves downward. Then, the telescopic end of the first telescopic rod 3 begins to retract. During the downward movement of the support hanging plate 1, under the elastic force of the second elastic element 8, the sliding frame 6 slides upward and resets along the fixed rod 5. At the same time, the connecting rope 10 loses its tension, the support plate 13 loses its compression on the I-beam, and the telescopic ends of the four second telescopic rods 14 begin to extend, driving the adjacent L connecting plates 12 to move synchronously. The support plates 13 on the front and rear sides move away from each other and gradually lose contact with the I-beam. Then, the workers release the hook 9 from the adjacent lifting lug and continue to move the support hanging plate 1 upward, so that the square plate 11 completely loses contact with the upper side of the I-beam.

[0037] Example 2: Based on Example 1, such as Figure 5 and Figure 6As shown, it also includes a clamping support mechanism, which is located on both sides of the square plate 11. The clamping support mechanism is used to apply shear force to the I-beam. The clamping support mechanism includes two symmetrical third telescopic rods 15. The third telescopic rods 15 are existing ordinary hydraulic telescopic rods, and their internal structure is not shown in the figure. Both third telescopic rods 15 are fixed to the first fixed plate 7 through mounting plates. Hydraulic oil is injected into the third telescopic rods 15. The telescopic ends of the third telescopic rods 15 pass through the adjacent sliding frames 6. Limiting plates are fixed to the top and middle of the telescopic part of the third telescopic rod 15. Initially, the sliding frame 6 contacts the limiting plate at the top of the telescopic part of the third telescopic rod 15. The limiting plate on the telescopic part of the third telescopic rod 15 is in a limiting fit with the adjacent sliding frame 6. When the sliding frame 6 presses down on the limiting plate in the middle of the telescopic part of the third telescopic rod 15, the telescopic part of the third telescopic rod 15 will retract inward. The support plate 13 is fixed with a support seat 16. The support base 16 is rotatably connected to a rotating plate via a pivot. Two symmetrical fixed columns 17 are fixedly connected to the rotating plate on the support base 16. Driven by the rotating plate, the two fixed columns 17 rotate and press against the I-beam, applying shear fixing force to the I-beam. The middle part of the fixed column 17 is a rigid steel column, and the outside of the fixed column 17 is wrapped with a layer of friction rubber to ensure the rigidity of the fixed column 17 and increase the friction between it and the I-beam. The pivot of the rotating plate on the support base 16 is fixedly connected to a rotating plate 18, which is used to drive the connected rotating plate to rotate. The rotating plate 18 is provided with a through groove. The support plate 13 is fixedly connected to a fourth telescopic rod 19 via a mounting seat. The fourth telescopic rod 19 is an existing ordinary hydraulic telescopic rod, and its internal structure is not shown in the attached drawings. The telescopic end of the fourth telescopic rod 19 slides with the adjacent rotating plate 18 on the same side via a connecting shaft. The two fourth telescopic rods 19 are respectively connected to the two third telescopic rods 15 by oil guide pipes.

[0038] As the two support plates 13 move closer to each other, the support plates 13 drive the support seats 16 fixed to them to move synchronously. Subsequently, the two adjacent fixed columns 17 are located on the upper and lower sides of the horizontal part of the I-beam. After the I-beam is lifted, the second elastic element 8 is compressed, the distance between the sliding frame 6 and the first fixed plate 7 decreases, and the sliding frame 6 slides down along the telescopic end of the third telescopic rod 15. The sliding frame 6 does not contact the limiting plate in the middle of the telescopic part of the third telescopic rod 15. At this time, the telescopic end of the third telescopic rod 15 will not retract. When the connection between the lifting lug and the I-beam breaks, the sliding frame 6 squeezes down the limiting plate in the middle of the third telescopic rod 15, and the distance between the sliding frame 6 and the first fixed plate 7 decreases again. The telescopic end of the third telescopic rod 15 gradually retracts. At this time, the hydraulic oil in the third telescopic rod 15 flows into the connected fourth telescopic rod through the oil guide pipe. Within 19, the hydraulic oil pressure inside the fourth telescopic rod 19 gradually increases, and then the telescopic end of the fourth telescopic rod 19 extends. The telescopic end of the fourth telescopic rod 19 drives the adjacent rotating plate 18 to swing upward through its connecting shaft. The rotating plate 18 drives the rotating plate on it to rotate synchronously along the adjacent support seat 16. The connecting shaft on the telescopic end of the fourth telescopic rod 19 slides along the through groove on the adjacent rotating plate 18. The rotating plate on the rotating plate 18 drives the two fixed columns 17 on it to rotate. At this time, the two fixed columns 17 squeeze the upper and lower sides of the horizontal part of the I-beam respectively. The adjacent two fixed columns 17 squeeze the I-beam and apply shear force to the I-beam, which improves the fixing strength of the I-beam and prevents the I-beam from slipping on the support plate 13 after the connection between the lifting lug and the I-beam breaks, causing the I-beam to lose balance in the air.

[0039] After the two ends of the I-beam are welded to the two brackets respectively, or after the I-beam is placed back on the ground, the support plate 1 is lowered. Under the elastic force of the second elastic element 8, the sliding frame 6 slides upward along the fixed rod 5 to reset. The sliding frame 6 contacts the limiting plate at the top of the telescopic part of the adjacent third telescopic rod 15, and then drives the telescopic end of the adjacent third telescopic rod 15 to move upward to reset. The hydraulic oil in the fourth telescopic rod 19 flows back to the connected third telescopic rod 15 along the oil guide pipe. The telescopic end of the fourth telescopic rod 19 moves downward to reset. The telescopic end of the fourth telescopic rod 19 drives the adjacent rotating plate 18 to reset. The two adjacent fixed columns 17 release the pressure on the I-beam, and the two fixed columns 17 reset along with the adjacent support plate 13.

[0040] Example 3: Based on Example 2, such as Figure 3 , Figures 7-9As shown, it also includes an anti-slip mechanism, which is set on both sides of the square plate 11. The anti-slip mechanism is used to prevent the I-beam from tilting and slipping during lifting. The anti-slip mechanism includes two sliding rods 20. The upper side of the sliding rod 20 is provided with a guide groove, and the bottom of the support plate 13 is provided with a fixing block. The sliding rod 20 is slidably connected to the fixing block at the bottom of the adjacent support plate 13 through the guide groove. The sliding rod 20 is located below the adjacent support plate 13. The sliding rod 20 is limited and engaged with the fixing block on the adjacent support plate 13. When the sliding rod 20 slides a specified length along the fixing block on the adjacent support plate 13, the sliding rod 20 can no longer slide. The sliding rod 20 is fixedly connected to a connecting frame 21. The connecting frame 21 is equipped with a one-way rotating wheel 22. The one-way rotating wheel 22 is an existing device. The specific unidirectional structure inside is not shown in the attached drawings. A torsion spring is fixed between the unidirectional rotating wheel 22 and the adjacent connecting frame 21. The torsion spring is used to drive the adjacent unidirectional rotating wheel 22 to rotate in one direction. A limit hook 23 is fixed to the unidirectional rotating wheel 22. The sliding rods 20 on both sides of the I-beam are at different heights to ensure that the limit hooks 23 on both sides of the I-beam are in contact with the vertical part of the I-beam at the same time. The limit hook 23 is used to limit the side of the I-beam. The limit hook 23 is set as n-shaped. The width of the notch of the limit hook 23 is greater than the thickness of the vertical part of the I-beam to ensure that the limit hook 23 limits the vertical part of the I-beam. A limit component is provided between the support plate 13 and the adjacent rotating plate 18. The limit component is used to limit the adjacent sliding rod 20.

[0041] like Figures 8-10As shown, the limiting assembly includes a second fixing plate 24, which is fixedly connected to an adjacent support plate 13. A mounting plate is fixedly connected to the end of the sliding rod 20 away from the limiting hook 23. The second fixing plate 24 engages with the adjacent limiting hook 23, causing the torsion spring between the limiting hook 23 and the connecting frame 21 to be in a stored state. A third elastic element 241 is fixedly connected between the second fixing plate 24 and the mounting plate on the adjacent sliding rod 20. The third elastic element 241 is configured as an elastic pull rope. A first limiting post 25 is slidably connected to the second fixing plate 24. A mounting plate is fixedly connected to the end of the first limiting post 25 away from the sliding rod 20. The first limiting... A fourth elastic element 26 is fixedly connected between the mounting plate of the first limiting post 25 and the second fixing plate 24. The fourth elastic element 26 is configured as a spring and is sleeved on the outside of the first limiting post 25. The sliding rod 20 is provided with a blind hole. The first limiting post 25 is limited and engaged with the blind hole of the adjacent sliding rod 20 to ensure that the third elastic element 241 is initially in a stretched state. A mounting plate is fixedly connected to the middle of the first limiting post 25. The mounting plate in the middle of the first limiting post 25 is limited and engaged with the adjacent second fixing plate 24 to prevent the first limiting post 25 from falling off the second fixing plate 24. The mounting plate at the end of the first limiting post 25 is fixedly connected to... The limiting frame 27 and the support plate 13 are fixedly connected to a third fixing plate 28. Both the limiting frame 27 and the third fixing plate 28 are provided with through holes. A second limiting post 29 is provided in the through hole of the limiting frame 27 and the through hole of the adjacent third fixing plate 28. Initially, the fourth elastic element 26 is in a compressed and stored state. The second limiting post 29 is in a limiting engagement with the adjacent limiting frame 27 and the third fixing plate 28. The upper end of the second limiting post 29 is fixedly connected to a mounting plate. A limiting connecting plate 30 is fixedly connected to the side of the rotating plate 18 near the adjacent second limiting post 29. The limiting connecting plate 30 is provided with through holes. The second limiting post 29 is located in the adjacent limiting connecting plate. The diameter of the through hole of the limiting connecting plate 30 is larger than the diameter of the adjacent second limiting post 29 to prevent the adjacent second limiting post 29 from deflecting when the connecting plate 30 swings upward. The diameter of the through hole of the limiting connecting plate 30 is smaller than the diameter of the mounting plate at the end of the adjacent second limiting post 29. After the connecting plate 30 lifts the mounting plate at the upper end of the adjacent second limiting post 29, the second limiting post 29 moves upward and releases the limitation on the adjacent limiting frame 27. The limiting connecting plate 30 and the mounting plate at the end of the second limiting post 29 are in a limiting cooperation to drive the second limiting post 29 out of the through hole of the adjacent limiting frame 27 and the third fixing plate 28.

[0042] When the telescopic end of the fourth telescopic rod 19 moves the adjacent rotating plate 18, the rotating plate 18 presses upward against the mounting plate at the upper end of the adjacent second limiting post 29 through the limiting connecting plate 30 on it. Subsequently, the second limiting post 29 moves upward and exits from the through hole of the adjacent limiting frame 27. Then, under the elastic force of the fourth elastic element 26, the first limiting post 25 slides along the adjacent second fixed plate 24. Furthermore, the first limiting post 25 loses its fit with the blind hole of the adjacent sliding rod 20. After the limiting is released, under the pulling force of the third elastic element 241, the sliding rod 20 slides along the lower side of the adjacent support plate 13. As the fixed block slides, the sliding rod 20 drives the connecting frame 21 and its parts to move. When the limiting hook 23 loses contact with the adjacent second fixed plate 24, the one-way rotating wheel 22 drives the limiting hook 23 to rotate under the action of the torsion spring. Then the limiting hook 23 presses against the side wall of the I-beam and slides along the I-beam. When the limiting hook 23 loses contact with the I-beam, the limiting hook 23 swings to a position perpendicular to the I-beam and stops rotating. The one-way rotating wheel 22 can only swing in one direction. At this time, the limiting hook 23 is in a locked state. At the same time, the sliding rod 20 is also limited by the fixed block on the lower side of the adjacent support plate 13, and the sliding rod 20 stops sliding.

[0043] When the I-beam slides laterally in the air, it will slide into the two adjacent limit hooks 23. Since the sliding rod 20 is in a fixed state, it provides support to the outer end of the I-beam, preventing it from slipping and causing a construction accident. After the I-beam is placed back on the ground, the workers will actively reset the sliding rod 20 and its parts, and make the first limit post 25 engage with the blind hole limit of the adjacent sliding rod 20 again. During normal hoisting, the limit hooks 23 will not pop out to block the connection between the I-beam and the corbel on the column. They will only pop out when the weld between the lifting lug and the I-beam breaks, which further improves the practicality of the invention.

[0044] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A safety lifting device for steel structure construction, comprising a supporting lifting plate (1), wherein the supporting lifting plate (1) is hinged with symmetrical first connecting seats (2), characterized in that: It also includes symmetrical first telescopic rods (3), which are fixedly connected to adjacent first connecting seats (2). The first telescopic rods (3) are filled with hydraulic oil. The telescopic end of the first telescopic rods (3) is fixedly connected to a second connecting seat (4). Symmetrical first elastic elements (401) are fixedly connected between the first telescopic rods (3) and adjacent second connecting seats (4). A fixed rod (5) is hinged to the end of the second connecting seat (4) away from the first connecting seat (2) via a pivot. The fixed rod (5) is slidably connected to a sliding frame (6). The fixed rod (5) is fixedly connected to a first fixed plate (7). A second elastic element (8) is fixedly connected between the first fixed plate (7) and adjacent sliding frame (6). A hook (9) is hinged to one end away from the second connecting seat (4). The sliding frame (6) is fixed with symmetrical connecting ropes (10). The symmetrical connecting ropes (10) are fixed together with a square plate (11). The square plate (11) is slidably connected to four L connecting plates (12) through mounting seats. The L connecting plates (12) located on the same side of the I-beam are fixed together with a support plate (13). The support plate (13) is used to support the I-beam. The four mounting seats of the square plate (11) are respectively fixed with second telescopic rods (14). The telescopic end of the second telescopic rod (14) is fixed to the adjacent L connecting plate (12). The first telescopic rod (3) and the four adjacent second telescopic rods (14) are all connected by oil guide pipes.

2. The safety lifting device for steel structure construction according to claim 1, characterized in that: The supporting plate (1), the first connecting seat (2) and the hook (9) are located on the same straight line to keep the first telescopic rod (3) in a vertically extended state.

3. A safety lifting device for steel structure construction according to claim 1, characterized in that: The square plate (11) has a through hole in the middle. The through hole of the square plate (11) is used to cooperate with the lifting lug of the I-beam to position the square plate (11).

4. A safety lifting device for steel structure construction according to claim 1, characterized in that: The sum of the elastic forces of adjacent first elastic elements (401) is greater than the weight of all parts on the first telescopic rod (3), which is used to ensure that the telescopic end of the first telescopic rod (3) is in a contracted state.

5. A safety lifting device for steel structure construction according to claim 3, characterized in that: It also includes a clamping support mechanism, which is disposed on both sides of the square plate (11). The clamping support mechanism is used to apply shear force to the I-beam. The clamping support mechanism includes symmetrical third telescopic rods (15). The symmetrical third telescopic rods (15) are all fixed to the first fixed plate (7) by mounting plates. The third telescopic rods (15) are filled with hydraulic oil. The telescopic end of the third telescopic rod (15) passes through the adjacent sliding frame (6). The top and middle of the telescopic part of the third telescopic rod (15) are fixed with limit plates. The limit plates on the telescopic part of the third telescopic rod (15) are in a limiting cooperation with the adjacent sliding frame (6). The support plate (13) is fixed with a support seat. (16) The support base (16) is rotatably connected to a rotating plate via a rotating shaft. Symmetrical fixed columns (17) are fixedly connected to the rotating plate on the support base (16). The middle part of the fixed column (17) is a hard steel column. The outer side of the fixed column (17) is wrapped with a layer of friction rubber. A rotating plate (18) is fixedly connected to the rotating shaft of the rotating plate on the support base (16). The rotating plate (18) is provided with a through groove. The support plate (13) is fixedly connected to a fourth telescopic rod (19) via a mounting seat. The telescopic end of the fourth telescopic rod (19) is slidably engaged with the adjacent rotating plate (18) on the same side via a connecting shaft. The symmetrical fourth telescopic rod (19) is connected to the symmetrical third telescopic rod (15) via an oil guide pipe.

6. A safety lifting device for steel structure construction according to claim 5, characterized in that: It also includes an anti-slip mechanism, which is disposed on both sides of the square plate (11). The anti-slip mechanism is used to prevent the I-beam from tilting and slipping during hoisting. The anti-slip mechanism includes symmetrical sliding rods (20). The upper side of the sliding rod (20) is provided with a guide groove. The bottom of the support plate (13) is provided with a fixing block. The sliding rod (20) is slidably connected to the fixing block at the bottom of the adjacent support plate (13) through the guide groove. The sliding rod (20) and the fixing block on the adjacent support plate (13) are connected. The sliding rod (20) is fixedly connected to a connecting frame (21), and the connecting frame (21) is equipped with a one-way rotating wheel (22). A torsion spring is fixedly connected between the one-way rotating wheel (22) and the adjacent connecting frame (21). The one-way rotating wheel (22) is fixedly connected to a limit hook (23), which is used to limit the side of the I-beam. A limit assembly is provided between the support plate (13) and the adjacent rotating plate (18), which is used to limit the adjacent sliding rod (20).

7. A safety lifting device for steel structure construction according to claim 6, characterized in that: The sliding rods (20) on both sides of the I-beam are at different heights to ensure that the limiting hooks (23) on both sides of the I-beam are in contact with the vertical part of the I-beam at the same time.

8. A safety lifting device for steel structure construction according to claim 7, characterized in that: The width of the notch of the limiting hook (23) is greater than the thickness of the vertical part of the I-beam, which is used to ensure that the limiting hook (23) is limited to the vertical part of the I-beam.

9. A safety lifting device for steel structure construction as described in claim 8, characterized in that: The limiting assembly includes a second fixing plate (24), which is fixedly connected to the adjacent support plate (13). A mounting plate is fixedly connected to one end of the sliding rod (20) away from the limiting hook (23). The second fixing plate (24) engages with the adjacent limiting hook (23). A third elastic element (241) is fixedly connected between the second fixing plate (24) and the mounting plate on the adjacent sliding rod (20). A first limiting post (25) is slidably connected to the second fixing plate (24). A mounting plate is fixedly connected to one end of the first limiting post (25) away from the sliding rod (20). A fourth elastic element (26) is fixedly connected between the mounting plate of the first limiting post (25) and the second fixing plate (24). The sliding rod (20) has a blind hole. The first limiting post (25) engages with the blind hole of the adjacent sliding rod (20). A mounting plate is fixedly connected to the middle of the first limiting post (25). A mounting plate in the middle of a limiting post (25) engages with an adjacent second fixing plate (24) for limiting. A limiting frame (27) is fixedly connected to the mounting plate at the end of the first limiting post (25). A third fixing plate (28) is fixedly connected to the support plate (13). Both the limiting frame (27) and the third fixing plate (28) are provided with through holes. A second limiting post (29) is provided in both the through hole of the limiting frame (27) and the through hole of the adjacent third fixing plate (28). The second limiting post (29) is in a limiting engagement with the adjacent limiting frame (27) and the third fixing plate (28). The end of the second limiting post (29) away from the limiting frame (27) is fixedly connected to an mounting plate. The rotating plate (18) is fixedly connected to a limiting connecting plate (30) on the side close to the adjacent second limiting post (29). The limiting connecting plate (30) is provided with a through hole. The second limiting post (29) is located in the through hole of the adjacent limiting connecting plate (30).

10. A safety lifting device for steel structure construction according to claim 9, characterized in that: The diameter of the through hole of the limiting connecting plate (30) is larger than the diameter of the second limiting post (29), and the diameter of the through hole of the limiting connecting plate (30) is smaller than the diameter of the end mounting plate of the second limiting post (29). The limiting connecting plate (30) and the end mounting plate of the second limiting post (29) are in a limiting cooperation to drive the second limiting post (29) to be taken out from the through hole of the adjacent limiting frame (27) and the third fixing plate (28).

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