Steel box arch rib cable hoisting sling and hoisting construction method thereof

Abstract

The invention provides a steel box arch rib cable hoisting sling and a hoisting construction method thereof.The steel box arch rib cable hoisting sling comprises cross beams, a connecting beam, an exposed beam, a fixing shaft and an inserting plate, the connecting beam is perpendicularly arranged between the two cross beams, a sliding groove is formed in the top of the exposed beam, a connecting base is arranged in the sliding groove in a sliding mode, an inserting groove is formed in the top of the connecting base, and the fixing shaft is arranged in the inserting groove; one end of the inserting plate is inserted into the inserting groove, a connecting bottom plate is fixedly arranged at the top of the inserting plate, a mounting shaft is arranged at the top of the connecting bottom plate, and the connecting beam is rotationally connected with the mounting shaft. The hoisting construction method comprises the following steps that S1, the gravity center of the steel box arch rib is positioned; s2, hoisting points are symmetrically arranged on the two sides of the steel box arch rib; s3, assembling a steel box arch rib cable hoisting sling; s4, adjusting the offset beam to rotate relative to the connecting beam to enable the lower lifting lug to be located above the lifting point; s5, adjusting the position of the connecting seat to enable the connecting seat to coincide with the gravity center of the steel box arch rib in the vertical direction; and S6, the steel box arch ribs are hoisted, and the steel box arch ribs are installed in a butt joint mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable hoisting, in particular to a steel box arch rib cable hoisting spreader and a hoisting construction method thereof. BACKGROUND

[0002] At present, in the installation and construction process of the steel box arch rib of the large-span basket-type steel box arch bridge, the steel box arch rib has three angles of horizontal angle, vertical angle and inward inclination angle in space, and accurate adjustment in the hoisting process is the key to guarantee the bridge line shape and structural safety.

[0003] A hoisting device and a hoisting method for adjusting and positioning the attitude of a steel box arch rib in the air are disclosed in Chinese Patent No. CN107338733B, which has 1-5 groups of jacks arranged in parallel on the hanger mechanism, and adjusts the inclination angle of the steel box arch rib in the air during hoisting through the jacks. The above scheme relies on multiple groups of jacks and hydraulic systems, has a high failure rate and high maintenance cost, and when multiple lifting points are independently adjusted, it is difficult to control synchronously, which may cause angle deviation and affect the closure precision. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a steel box arch rib cable hoisting spreader and a hoisting construction method thereof, which solves the problem of high maintenance cost when the existing steel box arch rib hoisting device relies on multiple groups of jacks to adjust the inclination angle of the steel box arch rib.

[0005] According to an embodiment of the present application, a steel box arch rib cable hoisting spreader comprises a cross beam, a connecting beam, a biasing beam, a fixing shaft and a plug-in plate. The cross beam is two, and the two cross beams are arranged in parallel. The connecting beam is arranged vertically between the two cross beams. The biasing beam is located directly below the connecting beam. The top of the biasing beam is provided with a sliding groove parallel to the axis thereof. A connecting seat is slidably arranged in the sliding groove. A driving mechanism is arranged on the top of the biasing beam for driving the connecting seat to slide in the sliding groove. A plug-in slot is arranged on the top of the connecting seat. One end of the plug-in plate is inserted into the plug-in slot. The connecting seat and the plug-in plate are connected and fixed through the fixing shaft. A connecting bottom plate is fixedly arranged on the top of the plug-in plate. An installation shaft is arranged on the top of the connecting bottom plate. The installation shaft vertically penetrates the connecting beam. The connecting beam is rotationally connected with the installation shaft. A limiting disc is arranged on the top end of the installation shaft. A locking mechanism is arranged on the top of the connecting beam for locking the limiting disc. Upper lifting lugs are arranged at the two ends of the top of the two cross beams. Lower lifting lugs are arranged at the two ends of the bottom of the biasing beam. Hoisting ropes are arranged on the two lower lifting lugs.

[0006] Compared with the prior art, the present application has the following beneficial effects: before construction, a steel box arch rib model is established, then the center of gravity of the steel box arch rib is positioned, at least two lifting points are arranged on both sides of the steel box arch rib, and the height of each lifting point is higher than the center of gravity of the steel box arch rib, the connecting seat is slidably arranged in the sliding groove, and a driving mechanism is arranged to drive the connecting seat to slide in the sliding groove, so that the position of the connecting seat in the horizontal direction can be adjusted, the center of the connecting seat coincides with the center of gravity of the steel box arch rib, so that the steel box arch rib is prevented from deflecting during hoisting of the steel box arch rib, the connecting beam is rotatably connected with the mounting shaft, the angle between the canting beam and the connecting beam can be reasonably adjusted according to the position of the lifting point, the lower lifting lug can be ensured to be located above the lifting point, the lifting rope is fixedly connected between each lifting point and the lower lifting lug, and when the canting beam is in a horizontal state, each lifting rope is ensured to be in a straight state according to the distance between each lifting point and the corresponding lower lifting lug, during hoisting, the cross beam moves vertically upward under the pulling of the crane cable, when the steel box arch rib is lifted to a position near the predetermined height, the angle of the steel box arch rib is adjusted by respectively controlling the elongation or shortening of each cable on the crane, so that the steel box arch rib can be aligned with the position to be installed, thereby facilitating the construction personnel to fix the steel box arch rib, and the above-mentioned mode reduces the need to arrange a plurality of sets of jacks to adjust the angle of the steel box arch rib, thereby greatly reducing the failure rate of the steel box arch rib cable hoist, reducing the maintenance cost, and improving the construction efficiency.

[0007] Further, the locking mechanism comprises: a fixed frame and a cross frame, the top of the connecting beam is symmetrically provided with two fixed frames, the cross frame is horizontally arranged between the two fixed frames, and the cross frame is located directly above the limiting disc, the top of the limiting disc is provided with a plurality of limiting holes arranged in a ring shape, and the top of the cross frame is provided with a plug-in mechanism for being inserted into the limiting hole.

[0008] Further, the plug-in mechanism comprises a locking screw and a rotating handle, the locking screw is vertically inserted into the limiting hole through the cross frame, and the locking screw is threadedly connected with the cross frame and the limiting hole, and the rotating handle is fixed at the top end of the locking screw.

[0009] Further, the top and the bottom of the connecting beam are tightly attached to the bottom of the limiting disc and the top of the connecting bottom plate, respectively.

[0010] Further, the driving mechanism comprises: a fixed plate, an adjusting screw and an adjusting plate, the fixed plate is two, the two fixed plates are symmetrically arranged at the two ends of the top of the canting beam, the adjusting screw is horizontally and rotatably arranged between the two fixed plates, the adjusting plate is fixed to the side wall of the connecting seat, the adjusting screw passes through the adjusting plate and the plug-in slot horizontally, and the adjusting screw is threadedly connected with the adjusting plate.

[0011] Further, the upper and lower lifting lugs each comprise a lifting plate and a pin shaft, the two lifting plates are symmetrically arranged at the top of the corresponding cross beam or the bias beam, and the pin shaft penetrates the two lifting plates horizontally and is fixedly connected with the lifting plates.

[0012] Further, as another embodiment of the locking mechanism, the locking mechanism comprises a mounting seat, a limiting gear and a driving member, the limiting disc is a toothed disc, the mounting seat is fixed at the top of the connecting beam, the middle part of the mounting seat is provided with a channel penetrating therethrough, the limiting gear penetrates the channel horizontally and is in sliding connection with the channel, and the driving member is arranged on the side wall of the mounting seat and is used to drive the limiting gear to engage with the limiting disc.

[0013] Further, the driving member comprises an adjusting screw and a pushing seat, the side wall of the mounting seat is fixed with a horizontal plate, the adjusting screw penetrates the horizontal plate vertically and is in threaded connection with the horizontal plate, the side of the limiting gear away from the limiting disc is fixedly provided with an inclined step, the bottom end of the adjusting screw is provided with the pushing seat, and the top end of the adjusting screw is connected with a handle through a connecting sleeve.

[0014] Further, the bottom of the channel is provided with a mounting groove, the bottom of the limiting gear is provided with a sliding column in sliding connection with the mounting groove, the sliding column and the side wall of the mounting groove close to the limiting disc are connected with a return spring, and the top of the connecting beam is further provided with a rolling ball in rolling connection with the bottom of the limiting gear.

[0015] The steel box arch rib cable hoisting lifting device is used for hoisting the steel box arch rib, and the hoisting construction method of the steel box arch rib cable hoisting lifting device comprises the following steps:

[0016] S1, a CAD / Revit software is used to establish a steel box arch rib model and locate the gravity center of the steel box arch rib;

[0017] S2, hoisting points are symmetrically arranged on both sides of the steel box arch rib, and the hoisting points are higher than the gravity center of the steel box arch rib;

[0018] S3, the steel box arch rib cable hoisting lifting device is assembled, then the lifting ropes of the steel box arch rib cable hoisting lifting device are connected with the hoisting points, and the plurality of hoisting ropes of the crown block group are connected with the upper lifting lugs at the top of the cross beam;

[0019] S4, the bias beam is adjusted to rotate relative to the connecting beam so that the lower lifting lug is located above the hoisting point;

[0020] S5, the position of the connecting seat is adjusted so that the connecting seat is coincident with the gravity center of the steel box arch rib in the vertical direction;

[0021] S6, the steel box arch rib is hoisted and the steel box arch ribs are butt-jointed and installed. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the steel box arch rib cable hoisting lifting device.

[0023] Figure 2 Structure diagram of the cross beam.

[0024] Figure 3 Structure diagram of the bias beam.

[0025] Figure 4 Structure diagram of the connecting structure between the connecting beam and the bias beam.

[0026] Figure 5 Structure diagram of the installation structure of the limiting disc.

[0027] Figure 6 Structure diagram of the connecting structure between the locking nut and the adjusting screw rod.

[0028] Figure 7 Structure diagram of another embodiment of the locking mechanism.

[0029] Figure 8 Structure diagram of the driving member of the locking mechanism. Figure 7 Structure diagram of the driving member of the locking mechanism.

[0030] In the above drawings: 1, the crown block; 2, the sling; 3, the lifting point; 4, the cross beam; 5, the connecting beam; 6, the bias beam; 7, the sliding groove; 8, the connecting seat; 9, the plug-in plate; 10, the fixed shaft; 11, the connecting bottom plate; 12, the lifting rope; 13, the limiting disc; 14, the limiting hole; 15, the fixed frame; 16, the cross frame; 17, the locking screw rod; 18, the rotating handle; 19, the fixed plate; 20, the adjusting screw rod; 21, the adjusting plate; 22, the pin shaft; 23, the lifting plate; 24, the locking nut; 25, the mounting seat; 26, the limiting gear; 27, the inclined surface step; 28, the cross plate; 29, the pushing seat; 30, the adjusting screw rod; 31, the connecting sleeve; 32, the handle; 33, the ball; 34, the installation groove; 35, the return spring; 36, the sliding column. DETAILED DESCRIPTION

[0031] The technical solutions in the present application will be further described below in combination with the drawings and embodiments.

[0032] As Figures 1-8As shown, the embodiment of the present application provides a steel box arch rib cable hoisting sling, which comprises two parallel arranged cross beams 4, a connecting beam 5 arranged between the two cross beams 4, the connecting beam 5 being fixed with the two cross beams 4 through welding or bolts, the included angle between the connecting beam 5 and the two cross beams 4 being 90°, a bias beam 6 arranged below the connecting beam 5, a chute 7 parallel to the axis of the bias beam 6 arranged on the top of the bias beam 6, a connecting seat 8 arranged in the chute 7, wherein the bottom end of the connecting seat 8 is sealingly connected with the chute 7, a driving mechanism arranged on the top of the bias beam 6, the driving mechanism being used to drive the connecting seat 8 to slide in the chute 7, a plug-in slot arranged on the top of the connecting seat 8, a plug-in plate 9 inserted in the plug-in slot, the side wall of the plug-in plate 9 being tightly attached to the inner wall of the plug-in slot, wherein the plug-in plate 9 is fixed with the connecting seat 8 through a fixing shaft 10, the fixing shaft 10 horizontally penetrating through the connecting seat 8 and the plug-in plate 9, the fixing shaft 10 being slidingly connected with the plug-in plate 9, the fixing shaft 10 being fixed with the connecting seat 8 through welding or being locked with the connecting seat 8 through nuts from both ends of the fixing shaft 10, a connecting bottom plate 11 fixedly arranged on the top of the plug-in plate 9, a mounting shaft vertically arranged on the top of the connecting bottom plate 11, the mounting shaft vertically penetrating through the connecting beam 5, the connecting beam 5 being rotatably connected with the mounting shaft, a limiting disc 13 arranged on the top end of the mounting shaft, a locking mechanism arranged on the top of the connecting beam 5 and used to lock the limiting disc 13, an upper lifting lug arranged on both ends of the top of the two cross beams 4, a lower lifting lug arranged on both ends of the bottom of the bias beam 6, and a lifting rope 12 arranged on both lower lifting lugs.

[0033] The upper lifting lug is arranged at the top of the cross beam 4, and the upper lifting lug is used for connecting the lifting rope 2 of the trolley group 1. When the steel box arch rib is lifted by using the lifting device, the trolley system is first built on the ground at the position where the steel box arch rib is to be installed. The number of the lifting ropes 2 of the trolley group 1 corresponds to the number of the upper lifting lugs, and the lifting ropes 2 are fixed on the corresponding upper lifting lugs respectively. Before construction, the model of the steel box arch rib is established, and then the center of gravity of the steel box arch rib is positioned. At least two lifting points 3 are arranged on both sides of the steel box arch rib, and the height of each lifting point 3 is higher than the center of gravity of the steel box arch rib. The connecting seat 8 is slidably arranged in the sliding groove 7, and a driving mechanism is arranged to drive the connecting seat 8 to slide in the sliding groove 7, so that the position of the connecting seat 8 in the horizontal direction can be adjusted, and the center of the connecting seat 8 coincides with the center of gravity of the steel box arch rib, thereby avoiding the deflection of the steel box arch rib during lifting. The connecting beam 5 is rotationally connected with the mounting shaft, and the included angle between the cantilever beam 6 and the connecting beam 5 can be reasonably adjusted according to the position of the lifting point 3, so that the lower lifting lug can be located above the lifting point 3. The lifting rope 12 is fixedly connected between each lifting point 3 and the lower lifting lug. According to the distance between each lifting point 3 and the corresponding lower lifting lug, it is ensured that each lifting rope 12 is in a straight state when the cantilever beam 6 is in a horizontal state. During lifting, the trolley lifting rope 2 pulls the cross beam 4 to move vertically upward. When the steel box arch rib is lifted to a predetermined height position, the angle of the steel box arch rib is adjusted by respectively controlling the elongation or shortening of each lifting rope 2 on the trolley, so that the steel box arch rib can be aligned with the position to be installed, thereby facilitating the workers to fix the steel box arch rib. The above-mentioned method reduces the need to set several groups of jacks to adjust the angle of the steel box arch rib, thereby greatly reducing the failure rate of the steel box arch rib cable lifting device, reducing the maintenance cost, and improving the construction efficiency.

[0034] As shown in Figure 4 and Figure 5 The locking mechanism includes a fixed frame 15 and a cross frame 16. The top of the connecting beam 5 is symmetrically provided with two fixed frames 15, and the cross frame 16 is horizontally arranged between the two fixed frames 15. The cross frame 16 is located directly above the limiting disc 13. The top of the limiting disc 13 is provided with a plurality of limiting holes 14 arranged in a ring shape. The top of the cross frame 16 is provided with a plug-in mechanism for inserting into the limiting hole 14. The plug-in mechanism includes a locking screw 17 and a rotating handle 18. The locking screw 17 vertically penetrates the cross frame 16 and is inserted into the limiting hole 14. The locking screw 17 is threadedly connected with the cross frame 16 and the limiting hole 14. The rotating handle 18 is fixed at the top end of the locking screw 17.

[0035] Specifically, the working principle of the locking mechanism is as follows: when the biasing beam 6 and the connecting beam 5 need to be released, the locking screw 17 is rotated by rotating the handle 18, so that the locking screw 17 is separated from the limiting hole 14 at the top of the limiting disc 13. At this time, the biasing beam 6 can be rotated relative to the connecting beam 5, so as to adjust the position of the biasing beam 6 and move the lower lifting lug at the bottom of the biasing beam 6 above the steel box arch rib lifting point 3. After the position of the biasing beam 6 is roughly adjusted, the biasing beam 6 is finely adjusted relative to the connecting beam 5, so that the locking screw 17 can be aligned with the limiting hole 14 closest to it in the horizontal direction on the limiting disc 13. Then, the locking screw 17 is twisted into the limiting hole 14 by rotating the handle 18, that is, the biasing beam 6 and the connecting beam 5 are fixed again. At the same time, the top and bottom of the connecting beam 5 are in close contact with the bottom of the limiting disc 13 and the top of the connecting bottom plate 11, respectively.

[0036] As shown in Figure 3 and Figure 6 , the driving mechanism includes: two fixed plates 19, an adjusting screw 20 and an adjusting plate 21. The two fixed plates 19 are symmetrically arranged at the two ends of the top of the biasing beam 6. The adjusting screw 20 is horizontally and rotatably arranged between the two fixed plates 19. The adjusting plate 21 is fixed to the side wall of the connecting seat 8. The adjusting screw 20 horizontally passes through the adjusting plate 21 and the plug-in slot. The adjusting screw 20 is threadedly connected with the adjusting plate 21. The two ends of the adjusting screw 20 pass through the corresponding fixed plates 19. When the position of the connecting seat 8 needs to be adjusted, the adjusting screw 20 is rotated to drive the adjusting plate 21 to slide the connecting seat 8 in the sliding groove 7, so as to adjust the position of the connecting seat 8. Further, locking nuts 24 can be arranged at the two ends of the adjusting screw 20 to fix the fixed plates 19 and the adjusting screw 20.

[0037] Specifically, as shown in Figure 2 , the upper lifting lug and the lower lifting lug each include: a lifting plate 23 and a pin shaft 22. The two lifting plates 23 are symmetrically arranged at the top of the corresponding cross beam 4 or biasing beam 6. The pin shaft 22 horizontally passes through the two lifting plates 23. The pin shaft 22 is fixedly connected with the lifting plate 23.

[0038] As shown in Figure 7 and Figure 8As shown, as another embodiment of the locking mechanism, the locking mechanism comprises: a mounting seat 25, a limiting gear 26 and a driving member, the limiting disc 13 is a toothed disc, the mounting seat 25 is fixed on the top of the connecting beam 5, the middle part of the mounting seat 25 is provided with a channel penetrating through it, the limiting gear 26 horizontally penetrates through the channel, and the limiting gear 26 is in sliding connection with the channel, and the driving member is arranged on the side wall of the mounting seat 25, and the driving member is used for driving the limiting gear 26 to engage with the limiting disc 13. The driving member comprises: an adjusting screw 30 and a pushing seat 29, the side wall of the mounting seat 25 is fixed with a horizontal plate 28, the adjusting screw 30 vertically penetrates through the horizontal plate 28, the adjusting screw 30 is in threaded connection with the horizontal plate 28, the side, away from the limiting disc 13, of the limiting gear 26 is fixedly provided with an inclined step 27, the bottom end of the adjusting screw 30 is provided with the pushing seat 29, and the top end of the adjusting screw 30 is connected with a handle 32 through a connecting sleeve 31.

[0039] When it is needed to lock the limiting disc 13, the adjusting screw 30 is rotated by rotating the handle 32, so that the adjusting screw 30 vertically pushes the pushing seat 29 to move downward, when the pushing seat 29 contacts the inclined step 27 fixed on the side wall of the limiting gear 26, the pushing seat 29 pushes the inclined surface of the inclined step 27, the inclined step 27 pushes the limiting gear 26 to move toward the limiting disc 13, and finally the limiting gear 26 engages with the limiting disc 13, so that the rotation of the limiting disc 13 is limited.

[0040] Specifically, the mounting groove 34 can also be arranged at the bottom of the channel, the bottom of the limiting gear 26 is provided with the sliding column 36 in sliding connection with the mounting groove 34, the sliding column 36 and the side wall of the mounting groove 34 close to the limiting disc 13 are connected with the reset spring 35, the top of the connecting beam 5 is further provided with the ball 33, the ball 33 is in rolling connection with the bottom of the limiting gear 26, the ball 33 plays a guiding role in the horizontal movement of the limiting gear 26, the reset spring 35 keeps away from the limiting disc 13 under natural conditions, when the limiting gear 26 engages with the limiting disc 13, the reset spring 35 is in a compressed state, the limiting gear 26 is separated from the limiting disc 13 under the elastic force of the reset spring 35 when the pushing seat 29 moves away from the inclined step 27, and further, one side of the mounting groove 34 is provided with an opening in communication with the outside, so that the reset spring 35 and the sliding column 36 are conveniently installed.

[0041] The application also provides a hoisting construction method of the steel box arch rib cable hoist, which comprises the following steps:

[0042] S1, a CAD / Revit software is used to establish a steel box arch rib model, and the gravity center of the steel box arch rib is located;

[0043] S2, hoisting points 3 are symmetrically arranged on both sides of the steel box arch rib, and the positions of the hoisting points 3 are higher than the gravity center of the steel box arch rib;

[0044] S3, assemble the steel box arch rib cable hoist, and then connect the hoisting rope 12 of the steel box arch rib cable hoist with the hoisting point 3, and connect the several hoisting ropes 2 of the crab 1 with the upper hoisting ears on the top of the cross beam 4;

[0045] S4, adjust the rotation of the partial beam 6 relative to the connecting beam 5 to make the lower hoisting ear above the hoisting point 3;

[0046] S5, adjust the position of the connecting seat 8 to make the connecting seat 8 coincide with the gravity center of the steel box arch rib in the vertical direction;

[0047] S6, hoist the steel box arch rib and install the steel box arch rib in butt joint.

[0048] Specifically, in step S4, the limiting disc 13 is released by controlling the locking mechanism, and then the partial beam 6 is rotated, and when it moves to the predetermined position, the limiting disc 13 is locked by the locking mechanism; in step S5, the connecting seat 8 is driven to slide in the sliding groove 7 by the driving mechanism, so that the connecting seat 8 moves to the position where it coincides with the gravity center of the steel box arch rib in the vertical direction.

[0049] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A steel box arch rib cable lifting sling, characterized in that: include: A crossbeam (4), a connecting beam (5), a skew beam (6), a fixed shaft (10) and a plug-in plate (9), wherein there are two crossbeams (4), the two crossbeams (4) are arranged in parallel, the connecting beam (5) is arranged vertically between the two crossbeams (4), the skew beam (6) is located directly below the connecting beam (5), the top of the skew beam (6) is provided with a slide groove (7) parallel to its axis, a connecting seat (8) is slidably provided in the slide groove (7), the top of the skew beam (6) is provided with a driving mechanism for driving the connecting seat (8) to slide in the slide groove (7), the top of the connecting seat (8) is provided with a plug-in groove, and one end of the plug-in plate (9) is inserted Inserted into the plug-in slot, the connecting seat (8) and the plug-in plate (9) are connected and fixed by the fixed shaft (10), the top of the plug-in plate (9) is fixedly provided with a connecting base plate (11), the top of the connecting base plate (11) is provided with a mounting shaft, the mounting shaft vertically passes through the connecting beam (5), the connecting beam (5) is rotatably connected to the mounting shaft, a limit plate (13) is provided at the top of the mounting shaft, a locking mechanism for locking the limit plate (13) is provided at the top of the connecting beam (5), upper lifting ears are provided at both ends of the top of the two cross beams (4), lower lifting ears are provided at both ends of the bottom of the biased beam (6), and a lifting rope (12) is provided on both lower lifting ears.

2. A steel box arch rib cable lifting sling according to claim 1, characterized in that: The locking mechanism comprises: a fixing frame (15) and a cross frame (16); two fixing frames (15) are symmetrically arranged on the top of the connecting beam (5); the cross frame (16) is horizontally arranged between the two fixing frames (15); the cross frame (16) is located directly above the limiting plate (13); a plurality of limiting holes (14) distributed in an annular shape are arranged on the top of the limiting plate (13); and a plug-in mechanism for inserting into the limiting holes (14) is arranged on the top of the cross frame (16).

3. A steel box arch rib cable lifting sling according to claim 2, characterized in that: The plug-in mechanism includes a locking screw (17) and a rotating handle (18). The locking screw (17) vertically passes through the cross frame (16) and is inserted into the limiting hole (14). The locking screw (17) is threadedly connected to the cross frame (16) and the limiting hole (14). The rotating handle (18) is fixed to the top end of the locking screw (17).

4. A steel box arch rib cable lifting sling according to claim 1, characterized in that: The top and bottom of the connecting beam (5) are respectively in close contact with the bottom of the limiting plate (13) and the top of the connecting bottom plate (11).

5. The cable hoisting sling for steel box arch ribs according to claim 1, characterized in that: The driving mechanism comprises: a fixed plate (19), an adjusting screw rod (20) and an adjusting plate (21); the fixed plates (19) are two, and the two fixed plates (19) are symmetrically arranged at the two ends of the top of the deflection beam (6); the adjusting screw rod (20) is horizontally and rotatably arranged between the two fixed plates (19); the adjusting plate (21) is fixed to the side wall of the connecting seat (8); the adjusting screw rod (20) horizontally passes through the adjusting plate (21) and the plug-in slot; the adjusting screw rod (20) is threadedly connected to the adjusting plate (21).

6. A steel box arch rib cable lifting sling according to claim 1, characterized in that: The upper hanging ear and the lower hanging ear both include: a hanging plate (23) and a pin (22); the hanging plate (23) is composed of two pieces, and the two hanging plates (23) are symmetrically arranged on the top of the corresponding cross beam (4) or the side beam (6); the pin (22) passes through the two hanging plates (23) horizontally, and the pin (22) is fixedly connected to the hanging plates (23).

7. The cable hoisting sling for steel box arch ribs according to claim 1, characterized in that: The locking mechanism comprises: a mounting seat (25), a limiting gear (26) and a driving member, the limiting disk (13) is a toothed disk, the mounting seat (25) is fixed on the top of the connecting beam (5), a channel is provided in the middle of the mounting seat (25), the limiting gear (26) passes through the channel horizontally, and the limiting gear (26) is slidably connected to the channel, the driving member is provided on the side wall of the mounting seat (25), and the driving member is used to drive the limiting gear (26) to engage with the limiting disk (13).

8. A steel box arch rib cable lifting sling as claimed in claim 7, characterized in that: The driving member comprises: an adjusting screw (30) and a pushing seat (29); a transverse plate (28) is fixed to the side wall of the mounting seat (25); the adjusting screw (30) vertically passes through the transverse plate (28); the adjusting screw (30) is threadedly connected to the transverse plate (28); a bevel step (27) is fixedly provided on the side of the limiting gear (26) away from the limiting plate (13); a pushing seat (29) is provided at the bottom end of the adjusting screw (30); and a handle (32) is connected to the top end of the adjusting screw (30) through a connecting sleeve (31).

9. The cable hoisting sling for steel box arch ribs according to claim 7, characterized in that: The bottom of the channel is provided with a mounting groove (34), the bottom of the limiting gear (26) is provided with a sliding column (36) slidably connected to the mounting groove (34), a return spring (35) is connected between the sliding column (36) and the side wall of the mounting groove (34) close to the limiting plate (13), and the top of the connecting beam (5) is also provided with a ball (33), and the ball (33) is rollingly connected to the bottom of the limiting gear (26).

10. The method for hoisting and installing the steel box arch rib cable hoisting device according to any one of claims 1 to 9, characterized in that: The steps include: S1. Use CAD / Revit software to build a steel box arch rib model and locate the center of gravity of the steel box arch rib; S2, symmetrically setting hanging points (3) on both sides of the steel box arch rib, and the position of the hanging points (3) is higher than the center of gravity of the steel box arch rib; S4. Assemble the steel box arch rib cable hoisting sling according to any one of claims 1 to 9, then connect the lifting rope (12) of the steel box arch rib cable hoisting sling to the lifting point (3), and connect the plurality of lifting ropes (2) of the overhead crane assembly (1) to the upper lifting ears at the top of the beam (4); S5, adjusting the side beam (6) to rotate relative to the connecting beam (5) so that the lower lifting lug is located above the lifting point (3); S6. Adjust the position of the connecting seat (8) so that the center of gravity of the connecting seat (8) and the steel box arch rib coincide with each other in the vertical direction; S7. Lift the steel box arch ribs and perform docking and installation of the steel box arch ribs.

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