A steel truss girder segment hoisting and rotating hoist

Abstract

This invention discloses a rotating hoisting device for steel truss girder segments, comprising a crossbeam. Each end of the crossbeam is connected to a distribution beam located above it and arranged longitudinally via a lower connecting beam. Each end of the distribution beam is connected to a movable pulley block located above it via an upper connecting beam. The middle of the crossbeam is also connected to a conversion beam located below it via a rotating drive mechanism. Multiple distribution adjustment beams are connected to the conversion beam, and hoisting ropes are connected to the distribution adjustment beams. This invention consists of a movable pulley block, upper connecting beam, distribution beam, lower connecting beam, crossbeam, rotating drive mechanism, conversion beam, and distribution adjustment beams. Through the rotating drive mechanism, during use, the reducer rotates, driving the large gear to rotate, thereby rotating the hoisting boom. The hoisting girder segment can be rotated 360° in the air. After the steel truss girder segment to be installed rotates 90°, it can be transported over the already installed girder segment. After being hoisted and moved to the installation position by cable hoisting, it rotates again to adjust the plane angle of the girder segment to align with the already installed girder segment.

Description

Technical Field

[0001] This invention relates to a rotating lifting device for steel truss girder segments, belonging to the technical field of bridge construction equipment. Background Technology

[0002] Canyon areas often feature deep, U-shaped river valleys with steep banks, resulting in extremely limited construction space. Furthermore, the canyons are deep, the bridges are high, and navigation is often impossible. Therefore, the cable-stayed installation method is primarily used for the construction of stiffening steel truss girders for suspension bridges in mountainous canyons.

[0003] Steel truss suspension bridges typically employ segmental hoisting, with segments connected on-site. A cable-stayed crane system is used for overall lifting, transportation, and installation from one bank, proceeding symmetrically from the mid-span outwards. The lifting points of the steel truss cables are positioned directly above the two main trusses, resulting in a cable spacing smaller than the overall width of the steel truss, preventing segments from passing through their installed positions in a normal posture. Therefore, in addition to vertical lifting and horizontal transportation, the cable-stayed crane system must also possess load-directing capabilities. Summary of the Invention

[0004] The purpose of this invention is to provide a rotating lifting device for steel truss girder segments. This device has a load-direction function, enabling the steel truss girder to rotate 360° in the air, thereby facilitating the lifting of steel truss girder segments under conditions limited by terrain, transportation, etc.

[0005] The technical solution of the present invention: A steel truss segment hoisting and rotating lifting device includes a crossbeam, each end of which is connected to a distribution beam located above it and arranged longitudinally via a lower connecting beam. Each end of the distribution beam is connected to a movable pulley block located above it via an upper connecting beam. The middle of the crossbeam is also connected to a conversion beam located below it via a rotating drive mechanism. Multiple distribution adjustment beams are connected to the conversion beam, and hoisting ropes are connected to the distribution adjustment beams.

[0006] In the aforementioned steel truss segment hoisting and rotating lifting device, the movable pulley block is connected to the upper connecting beam, the distribution beam is connected to the upper connecting beam and the lower connecting beam respectively, the crossbeam is connected to the lower connecting beam and the rotating drive mechanism respectively, and the conversion beam is connected to the rotating drive mechanism and the distribution adjustment beam respectively, all by means of pins. The pin holes of each component through which the pin passes are provided with reinforcing plates on both the inner and outer sides. The pin is provided with a slot, and the slot is inserted into the slot and fixed together with the outer reinforcing plate by bolts.

[0007] In the aforementioned steel truss segment hoisting and rotating lifting device, the movable pulley block includes multiple pulley block plates arranged in parallel and at intervals. Multiple mounting shafts and screws pass through the multiple pulley block plates. Lifting pulleys and limiting steel pipes are respectively sleeved on the mounting shafts and screws between adjacent pulley block plates. The lower end of the multiple pulley block plates is provided with pin shaft through holes.

[0008] In the aforementioned steel truss segment hoisting and rotating lifting device, the upper connecting beam includes two spaced and parallel upper connecting beam pull plates. Each upper connecting beam pull plate has an upper connecting beam lower pull plate on its outer side. The upper connecting beam lower pull plates extend downward from the middle of the upper connecting beam pull plates. The bottom end of the upper connecting beam pull plate and the upper connecting beam lower pull plate, the top end of the upper connecting beam lower pull plate and the adjacent upper connecting beam pull plate, and the upper connecting beam pull plates are connected together by cover plates. The upper ends of the two upper connecting beam pull plates and the lower ends of the two upper connecting beam lower pull plates are provided with pin holes.

[0009] In the aforementioned steel truss segment lifting and rotating hoist, the distribution beam includes two spaced, parallel distribution beam side plates. The top and bottom of the two distribution beam side plates are respectively connected to a distribution beam panel and a distribution beam bottom plate. The two distribution beam side plates are connected by multiple vertically arranged distribution beam stiffening plates. Pin holes are provided at both ends and in the middle of the two distribution beam side plates. The crossbeam includes two spaced, parallel crossbeam side plates. The top and bottom of the two crossbeam side plates are respectively connected to a crossbeam panel and a crossbeam bottom plate. The two crossbeam side plates are connected by multiple vertically arranged crossbeam stiffening plates. A crossbeam connecting seat is provided at each end of the crossbeam panel. Pin holes are provided at the crossbeam connecting seat and the middle position of the two crossbeam side plates.

[0010] In the aforementioned steel truss segment hoisting and rotating lifting device, the lower connecting beam includes two spaced and parallel lower connecting beam upper pull plates. The inner walls of the two lower connecting beam upper pull plates are connected from the middle downwards through the two spaced and parallel lower connecting beam lower pull plates. A lower connecting beam reinforcing plate is connected between the top and middle of the two lower connecting beam lower pull plates. Pin holes are provided at the top and bottom of the two lower connecting beam upper pull plates.

[0011] In the aforementioned steel truss segment hoisting rotating hoist, the rotating drive mechanism includes a rotating mechanism base plate, two rotating mechanism side plates are provided on the rotating mechanism base plate, and corresponding pin holes are provided at the upper ends of the two rotating mechanism side plates. A lifting rod mounting seat is provided on the rotating mechanism base plate between the two rotating mechanism side plates. A lifting rod is vertically provided in the lifting rod mounting seat. A support sleeve is fixedly connected to the head end of the lifting rod located above the lifting rod mounting seat. A large gear is fixedly sleeved on the lifting rod located below the rotating mechanism base plate. A pin hole is provided at the lower end of the lifting rod. The large gear meshes with multiple small gears. The small gears are fixedly sleeved on the output shaft of the reducer. The reducer is installed on the rotating mechanism base plate and connected to the drive motor.

[0012] In the aforementioned steel truss segment hoisting and rotating lifting device, multiple bearings are sleeved on the lifting rod; the support sleeve is threadedly connected to the lifting rod.

[0013] In the aforementioned steel truss segment hoisting and rotating lifting device, the transfer beam includes a transfer beam mounting base, which is formed by welding the front, rear, left, and right side plates of the transfer beam and the middle stiffening plate of the transfer beam together. The upper ends of the front and rear side plates of the transfer beam and the stiffening plate of the transfer beam are provided with pin holes for connecting to the rotation drive mechanism; the lower ends of the left and right side plates of the transfer beam are each provided with a pin hole for connecting to the distribution adjustment beam at the front and rear.

[0014] In the aforementioned steel truss segment hoisting and rotating lifting device, the distribution adjustment beam includes an adjustment beam base formed by welding together front, rear, left, and right side plates and a top plate. Two adjustment beam supports are installed on the top of the adjustment beam base, and each of the two adjustment beam supports is provided with a pin through hole. Inside the adjustment beam base, the left and right ends are each connected to two adjustment beam pulleys via a pin, and the adjustment beam pulleys are connected to the hoisting rope.

[0015] The beneficial effects of the present invention are as follows: Compared with the prior art, the lifting device of the present invention is composed of a movable pulley block, an upper connecting beam, a distribution beam, a lower connecting beam, a crossbeam, a rotary drive mechanism, a conversion beam, and a distribution adjustment beam. By providing a rotary drive mechanism, the speed reducer rotates during use, driving the large gear to rotate, thereby realizing the rotation of the lifting rod. The lifting beam segment can be rotated 360° in the air. After the steel truss beam segment to be installed rotates 90°, it can be transported over the installed beam segment. After the cable hoisting is lifted and traveled to the installation position, it rotates again to adjust the plane angle of the beam segment to connect with the installed beam segment.

[0016] In summary, the lifting device of the present invention can be used in conjunction with cable cranes, has load steering function, reasonable structural design, and is safe and reliable. It can complete the overall 360° rotation of the steel truss in the air, thereby realizing the lifting of steel truss segments under the constraints of terrain, transportation and other conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the left-side structure of the present invention;

[0019] Figure 3 This is a top view of the structure of the present invention;

[0020] Figure 4 This is a schematic diagram of a movable pulley system.

[0021] Figure 5 This is a schematic diagram of the A-A sectional view of the movable pulley block;

[0022] Figure 6 This is a schematic diagram of the B-B cross-sectional structure of the movable pulley block;

[0023] Figure 7This is a schematic diagram of the upper connecting beam structure;

[0024] Figure 8 This is a schematic diagram of the distribution beam structure;

[0025] Figure 9 This is a schematic diagram of the lower connecting beam structure;

[0026] Figure 10 for Figure 9 A schematic diagram of the side structure;

[0027] Figure 11 This is a schematic diagram of the main structural view of the beam;

[0028] Figure 12 This is a schematic diagram of the main structure of the rotary drive mechanism;

[0029] Figure 13 This is a schematic diagram of the rotary drive mechanism A-A.

[0030] Figure 14 This is a schematic diagram of the transfer beam structure;

[0031] Figure 15 for Figure 14 A schematic diagram of the side structure;

[0032] Figure 16 A schematic diagram of the distribution and adjustment beam structure;

[0033] Figure 17 for Figure 16 A schematic diagram of the side structure.

[0034] Attached reference numerals: 1. Movable pulley block; 1-1. Multiple pulley block pull plate; 1-2. Mounting shaft; 1-3. Lifting pulley; 1-4. Screw; 1-5. Limiting steel pipe; 2. Upper connecting beam; 2-1. Upper connecting beam upper pull plate; 2-2. Upper connecting beam lower pull plate; 2-3. Cover plate; 3. Distribution beam; 3-1. Distribution beam panel; 3-2. Distribution beam side plate; 3-3. Distribution beam bottom plate; 3-4. Distribution beam stiffening plate; 4. Lower connecting beam; 4-1. Lower connecting beam upper pull plate; 4-2. Lower connecting beam lower pull plate; 4-3. Lower connecting beam reinforcing plate; 5. Crossbeam; 5-1. Crossbeam panel; 5-2. Crossbeam side plate; 5-3. Crossbeam bottom plate; 5 -4. Crossbeam stiffening plate; 5-5. Crossbeam connecting seat; 6. Rotary drive mechanism; 6-1. Rotary mechanism base plate; 6-2. Rotary mechanism side plate; 6-3. Bearing; 6-4. Hanger mounting seat; 6-5. Hanger; 6-6. Support sleeve; 6-7. Large gear; 6-8. Small gear; 6-9. Reducer; 7. Transfer beam; 7-1. Transfer beam mounting seat; 7-2. Transfer beam side plate; 7-3. Transfer beam stiffening plate; 8. Distribution and adjustment beam; 8-1. Adjustment beam base; 8-2. Adjustment beam support; 8-3. Adjustment beam pulley; 9. Reinforcing plate; 10. Clamping plate; 11. Pin shaft. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0036] An embodiment of the present invention: A steel truss segment hoisting rotating hoisting device includes a crossbeam 5. Each end of the crossbeam 5 is connected to the middle of a distribution beam 3 located above it and arranged longitudinally via a lower connecting beam 4. Each end of the distribution beam 3 is connected to a movable pulley block 1 located above it via an upper connecting beam 2. The middle of the crossbeam 5 is also connected to a conversion beam 7 located below it via a rotating drive mechanism 6. Two distribution adjustment beams 8 are connected to the conversion beam 7, and hoisting ropes are connected to the distribution adjustment beams 8.

[0037] In the steel truss segment hoisting rotary lifting device of the present invention, the movable pulley block 1 is located at the top of the entire lifting device and is connected to the trolley via a lifting rope. The lifting rope connected to the distribution and adjustment beam 8 is used to connect the steel truss segments. When the steel truss segment encounters an already installed segment during the hoisting process and cannot pass, the rotary drive mechanism 6 can drive the entire conversion beam 7, the distribution and adjustment beam 8, and the hoisted steel truss segment to rotate 360° in the air. After the steel truss segment to be installed rotates 90°, it can be transported over the already installed beam segment. Then, after the cable hoisting is carried to the installation position, the rotary drive mechanism 6 drives the steel truss segment to rotate again, adjusts the plane angle of the beam segment, and realizes docking with the already installed beam segment.

[0038] The movable pulley block 1 is connected to the upper connecting beam 2, the upper connecting beam 2 to the distribution beam 3, the distribution beam 3 to the lower connecting beam 4, the lower connecting beam 4 to the crossbeam 5, the crossbeam 5 to the rotary drive mechanism 6, the rotary drive mechanism 6 to the conversion beam 7, and the conversion beam 7 to the distribution adjustment beam 8 via pins 11, thereby achieving interconnection between the various components. Furthermore, during hoisting, the pins 11 can be deflected at a certain angle. Reinforcing plates 9 are provided on both the inner and outer sides of the pin holes through which the pins 11 pass, improving the structural strength of the pin holes and preventing breakage under tensile force. Each pin 11 has a slot at both ends outside the pin hole, and each slot has two locking plates 10. After the locking plates 10 are inserted into the slots, they are fixed to the outer reinforcing plates 9 with bolts, thus limiting and fixing the pin 11 and preventing it from slipping out of the pin hole.

[0039] The movable pulley block 1 includes four pulley block plates 1-1 arranged in parallel and at intervals. Three mounting shafts 1-2 pass through the upper ends of the four pulley block plates 1-1. Multiple screws 1-4 also pass through the four pulley block plates 1-1. Lifting pulleys 1-3 are sleeved on the mounting shafts 1-2 between adjacent pulley block plates 1-1. Lifting limit steel pipes 1-5 are sleeved on the screws 1-4 between adjacent pulley block plates 1-1. Both ends of 2 and screw 1-4 are locked and fixed with nuts. The two ends of the limiting steel pipe 1-5 abut against the two adjacent pulley block plates 1-1 to limit and fix the pulley block plates 1-1, ensuring that the interval between adjacent pulley block plates 1-1 is fixed. The lifting pulley 1-3 is connected to the trolley through the lifting rope. The lower middle of the four pulley block plates 1-1 is provided with a pin through hole, which is used to pass through the pin 11 connecting the upper connecting beam 2 and the moving pulley block 1.

[0040] The upper connecting beam 2 includes two spaced, parallel upper connecting beam pull plates 2-1. Each upper connecting beam pull plate 2-1 has a spaced-apart lower connecting beam pull plate 2-2 parallel to it on its outer side. The lower connecting beam pull plate 2-2 extends downward from the middle of the upper connecting beam pull plate 2-1. The distance between the bottom end of the upper connecting beam pull plate 2-1 and the lower connecting beam pull plate 2-2, and the distance between the top end of the lower connecting beam pull plate 2-2 and the adjacent upper connecting beam pull plate 2-1, are as follows: The upper connecting beam upper pull plates 2-1 are welded together with each other via cover plates 2-3. Multiple cover plates 2-3 connect the upper connecting beam upper pull plates 2-1 and the upper connecting beam lower pull plates 2-2 to form a whole. The upper ends of the two upper connecting beam upper pull plates 2-1 and the lower ends of the two upper connecting beam lower pull plates 2-2 are provided with pin holes. The pin holes at the upper ends are used to pass through the pin 11 connecting the upper connecting beam 2 and the movable pulley block 1, and the pin holes at the lower ends are used to pass through the pin 11 connecting the upper connecting beam 2 and the distribution beam 3.

[0041] The distribution beam 3 includes two spaced, parallel distribution beam side plates 3-2. The top and bottom of the two distribution beam side plates 3-2 are respectively welded to a distribution beam panel 3-1 and a distribution beam bottom plate 3-3. The two distribution beam side plates 3-2 are welded together by multiple vertically arranged distribution beam stiffening plates 3-4. The distribution beam stiffening plates 3-4 strengthen the connection between the two distribution beam side plates 3-2. The upper part of both ends and the lower part of the middle of the two distribution beam side plates 3-2 are provided with pin holes. The pin holes at both ends are used to pass through the pin 11 connecting the upper connecting beam 2 and the distribution beam 3, and the pin hole at the lower part of the middle is used to pass through the pin 11 connecting the distribution beam 3 and the lower connecting beam 4.

[0042] The crossbeam 5 includes two spaced, parallel crossbeam side plates 5-2. The top and bottom of each side plate 5-2 are connected to a crossbeam panel 5-1 and a crossbeam base plate 5-3, respectively. The two side plates 5-2 are connected by multiple vertically arranged crossbeam stiffening plates 5-4. Each end of the crossbeam panel 5-1 has a crossbeam connecting seat 5-5. Both the crossbeam connecting seat 5-5 and the two side plates 5-2 have pin holes in the middle. The pin holes on the crossbeam connecting seats 5-5 are for passing through pins 11 that connect the lower connecting beam 4 and the crossbeam 5, while the middle pin holes are for passing through pins 11 that connect the crossbeam 5 and the rotary drive mechanism 6.

[0043] The lower connecting beam 4 includes two spaced and parallel lower connecting beam upper pull plates 4-1. The inner walls of the two lower connecting beam upper pull plates 4-1 are welded together from the middle downwards through two spaced and parallel lower connecting beam lower pull plates 4-2. The two lower connecting beam upper pull plates 4-1 and the two lower connecting beam lower pull plates 4-2 form a cross structure. A lower connecting beam reinforcing plate 4-3 is connected between the top and middle of the two lower connecting beam lower pull plates 4-2. The top of the two lower connecting beam upper pull plates 4-1 and the bottom of the two lower connecting beam lower pull plates 4-2 are provided with pin holes. The pin holes on the two lower connecting beam upper pull plates 4-1 are used to pass through the pins 11 connecting the distribution beam 3 and the lower connecting beam 4, while the pin holes on the two lower connecting beam lower pull plates 4-2 are used to pass through the pins 11 connecting the crossbeam 5 and the lower connecting beam 4.

[0044] The rotary drive mechanism 6 includes a rotary mechanism base plate 6-1, on which two rotary mechanism side plates 6-2 are provided. Corresponding pin holes are provided at the upper ends of the two rotary mechanism side plates 6-2 for connecting the crossbeam 5 and the pin 11 of the rotary drive mechanism 6. A hanger mounting seat 6-4 is provided on the rotary mechanism base plate 6-1 between the two rotary mechanism side plates 6-2. A hanger 6-5 is vertically arranged in the hanger mounting seat 6-4. A support sleeve 6-6 is fixedly connected to the head end of the hanger 6-5 located above the hanger mounting seat 6-4. 6. The entire boom 6-5 is supported on the boom mounting base 6-4 to prevent it from falling off under gravity. A large gear 6-7 is fixedly sleeved on the boom 6-5, located below the base plate 6-1 of the rotating mechanism. A pin hole is provided at the lower end of the boom 6-5 for the pin 11 connecting the rotating drive mechanism 6 and the conversion beam 7 to pass through. The large gear 6-7 meshes with two small gears 6-8, which are fixedly sleeved on the output shaft of the reducer 6-9. The reducer 6-9 is mounted on the base plate 6-1 of the rotating mechanism and connected to the drive motor. When the steel truss segment to be lifted rotates, the drive motor drives the output shaft of the reducer 6-9 to rotate, which in turn drives the small gears 6-8 to rotate. The small gears 6-8 then drive the large gear 6-7 to rotate, ultimately rotating the boom 6-5, which in turn drives the connected conversion beam 7 to rotate, thus achieving the rotation of the steel truss segment.

[0045] Multiple bearings 6-3 are sleeved on the boom 6-5. The main function of the bearings 6-3 is to support the boom 6-5, reduce the coefficient of friction during its movement, and ensure its rotational accuracy. The support sleeve 6-6 is threadedly connected to the boom 6-5, facilitating the connection and separation of the two.

[0046] The conversion beam 7 includes a conversion beam mounting base 7-1, which is formed by welding together the front, rear, left, and right side plates 7-2, the middle stiffening plate 7-3, and the top plate of the conversion beam to form a box structure. The upper ends of the front and rear side plates 7-2 and the internal stiffening plate 7-3 are provided with pin holes for connection to the rotary drive mechanism 6. The lower ends of the left and right side plates 7-2 are each provided with a pin hole for connection to the distribution adjustment beam 8, and the two pin holes are used to connect the two distribution adjustment beams 8.

[0047] The distribution adjustment beam 8 includes an adjustment beam base 8-1 formed by welding together front, rear, left, and right side plates and a top plate. Two adjustment beam supports 8-2 are mounted on the top of the adjustment beam base 8-1. Each adjustment beam support 8-2 has a pin hole for passing through, which is used to connect the distribution adjustment beam 8 and the conversion beam 7. Inside the adjustment beam base 8-1, at both the left and right ends, are two adjustment beam pulleys 8-3 connected via a pin 11. The adjustment beam pulleys 8-3 are connected to lifting ropes, which are used to secure the steel truss beam segment to be lifted.

[0048] Taking a suspension bridge as an example: This suspension bridge is a highway bridge with a main span of 1420m and a vertical distance of 625m between the bridge deck and the water surface. The steel truss girder adopts a steel plate truss composite structure, with a Warren-style truss structure. The truss height is 8m, the center-to-center distance between the two main trusses is 27.0m, the standard span length is 7.7m, the span length at the beam end is 7.3m, the standard segment length is 15.4m, and the entire bridge consists of 93 segments, with a standard beam segment weighing 215t. The bridge is lifted, transported, and installed as a whole from one bank, with the installation sequence proceeding symmetrically from the mid-span to both sides. To ensure that the beam segments are not affected by the already installed beam segments during transportation and that angle adjustments can be made during installation, the steel truss girder segment lifting and rotating hoisting device provided by this invention is used in conjunction with a cable crane. This hoisting device has a reasonable structural design, is safe and reliable, and can complete the 360° rotation of the steel truss girder as a whole in the air, subject to limitations such as terrain and transportation conditions.

Claims

1. A steel truss segment lifting and rotating lifting device, characterized in that: It includes a crossbeam (5), with each end of the crossbeam (5) connected to the middle of a distribution beam (3) located above it and arranged longitudinally via a lower connecting beam (4). Each end of the distribution beam (3) is connected to a movable pulley block (1) located above it via an upper connecting beam (2). The middle of the crossbeam (5) is also connected to a conversion beam (7) located below it via a rotary drive mechanism (6). Multiple distribution adjustment beams (8) are connected to the conversion beam (7), and suspension ropes are connected to the distribution adjustment beams (8). The movable pulley block (1) is connected to the upper connecting beam (2), the distribution beam (3) is connected to the upper connecting beam (2) and the lower connecting beam (4) respectively, the cross beam (5) is connected to the lower connecting beam (4) and the rotary drive mechanism (6) respectively, and the conversion beam (7) is connected to the rotary drive mechanism (6) and the distribution adjustment beam (8) respectively. The pin shaft (11) passes through the pin shaft holes of each component and is provided with reinforcing plates (9) on both the inside and outside. The pin shaft (11) is provided with a slot, and the slot plate (10) is inserted into the slot and fixed together with the outer reinforcing plate (9) by bolts. The distribution beam (3) includes two spaced, parallel distribution beam side plates (3-2). The top and bottom of the two distribution beam side plates (3-2) are respectively connected to the distribution beam panel (3-1) and the distribution beam bottom plate (3-3). The two distribution beam side plates (3-2) are connected by multiple vertically arranged distribution beam stiffening plates (3-4). The two distribution beam side plates (3-2) are provided with pin holes at both ends and in the middle. The crossbeam (5) includes two spaced, parallel distribution beam side plates (3-1) and the distribution beam bottom plate (3-3) (3-1). The two beam side plates (5-2) are arranged in parallel. The top and bottom of the two beam side plates (5-2) are respectively connected to the beam panel (5-1) and the beam bottom plate (5-3). The two beam side plates (5-2) are connected by multiple vertically arranged beam stiffening plates (5-4). A beam connecting seat (5-5) is provided at each end of the beam panel (5-1). The beam connecting seat (5-5) and the two beam side plates (5-2) are provided with pin holes in the middle. The conversion beam (7) includes a conversion beam mounting base (7-1), which is formed by welding the front, rear, left and right conversion beam side plates (7-2) and the middle conversion beam stiffening plate (7-3) together. The front and rear conversion beam side plates (7-2) and the upper end of the conversion beam stiffening plate (7-3) are provided with pin holes for connecting to the rotary drive mechanism (6). The lower end of the left and right conversion beam side plates (7-2) is provided with a pin hole for connecting to the distribution adjustment beam (8) at the front and rear.

2. The steel truss segment lifting and rotating hoisting device according to claim 1, characterized in that: The movable pulley block (1) includes multiple pulley block plates (1-1) arranged in parallel and at intervals. Multiple mounting shafts (1-2) and screws (1-4) pass through the multiple pulley block plates (1-1). Lifting pulleys (1-3) and limiting steel pipes (1-5) are respectively sleeved on the mounting shafts (1-2) and screws (1-4) between adjacent pulley block plates (1-1). The lower end of the multiple pulley block plates (1-1) is provided with pin holes.

3. The steel truss segment lifting and rotating lifting device according to claim 1, characterized in that: The upper connecting beam (2) includes two spaced and parallel upper connecting beam pull plates (2-1). Each upper connecting beam pull plate (2-1) has an upper connecting beam pull plate (2-2) on its outer side. The upper connecting beam pull plate (2-2) extends downward from the middle of the upper connecting beam pull plate (2-1). The bottom end of the upper connecting beam pull plate (2-1) and the upper connecting beam pull plate (2-2) are connected together, as are the top end of the upper connecting beam pull plate (2-2) and the adjacent upper connecting beam pull plate (2-1), and the upper connecting beam pull plates (2-1) are connected to each other by a cover plate (2-3). The upper ends of the two upper connecting beam pull plates (2-1) and the lower ends of the two upper connecting beam pull plates (2-2) are provided with pin holes.

4. The steel truss segment lifting and rotating lifting device according to claim 1, characterized in that: The lower connecting beam (4) includes two spaced and parallel lower connecting beam upper pull plates (4-1). The inner walls of the two lower connecting beam upper pull plates (4-1) are connected from the middle downward through two spaced and parallel lower connecting beam lower pull plates (4-2). A lower connecting beam reinforcing plate (4-3) is connected between the top and middle of the two lower connecting beam lower pull plates (4-2). The top of the two lower connecting beam upper pull plates (4-1) and the bottom of the two lower connecting beam lower pull plates (4-2) are provided with pin holes.

5. The steel truss segment lifting and rotating hoisting device according to claim 1, characterized in that: The rotary drive mechanism (6) includes a rotary mechanism base plate (6-1), on which two rotary mechanism side plates (6-2) are provided. The upper ends of the two rotary mechanism side plates (6-2) are provided with corresponding pin holes. A rod mounting seat (6-4) is provided on the rotary mechanism base plate (6-1) between the two rotary mechanism side plates (6-2). A rod (6-5) is vertically arranged in the rod mounting seat (6-4). The upper boom (6-5) is fixedly connected to a support sleeve (6-6). A large gear (6-7) is fixedly sleeved on the boom (6-5) located below the base plate (6-1) of the rotating mechanism. A pin hole is provided at the lower end of the boom (6-5). The large gear (6-7) meshes with multiple small gears (6-8). The small gears (6-8) are fixedly sleeved on the output shaft of the reducer (6-9). The reducer (6-9) is installed on the base plate (6-1) of the rotating mechanism and connected to the drive motor.

6. The steel truss segment lifting and rotating hoisting device according to claim 5, characterized in that: Multiple bearings (6-3) are sleeved on the boom (6-5); the support sleeve (6-6) is threadedly connected to the boom (6-5).

7. The steel truss segment lifting and rotating hoisting device according to claim 1, characterized in that: The distribution adjustment beam (8) includes an adjustment beam base (8-1) formed by welding together front, rear, left, right side plates and a top plate. Two adjustment beam supports (8-2) are installed on the top of the adjustment beam base (8-1). Each of the two adjustment beam supports (8-2) is provided with a pin through hole. Two adjustment beam pulleys (8-3) are connected to the left and right ends of the adjustment beam base (8-1) through a pin (11). The adjustment beam pulleys (8-3) are connected to the suspension rope.

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