A steel truss segment lifting and balancing device

Abstract

This utility model provides a balancing lifting device for steel truss girder segments, comprising two first lifting rods, a support platform, a rotating mechanism, and a lifting frame connected sequentially from top to bottom; a connecting seat is provided on each side of the upper end of the support platform; the two first lifting rods are hinged to the two connecting seats respectively; a hydraulic cylinder for adjusting the rotation angle of the first lifting rod is provided on each side of the first lifting rod; the two ends of the hydraulic cylinder are hinged to the side wall of the first lifting rod and the upper surface of the support platform respectively; an installation groove is opened at the upper end of the support platform between the two connecting seats, and a drive motor is installed in the installation groove. The output shaft of the drive motor is connected to the rotating mechanism; the rotating mechanism can drive the lifting frame to rotate under the drive of the drive motor. This utility model can not only adjust the overall balance of the lifting device in a timely manner, effectively preventing the steel truss girder segment from tilting during the lifting process, but also adjust the horizontal angle of the steel truss girder segment for precise docking with adjacent structures.

Description

Technical Field

[0001] This utility model relates to the field of hoisting equipment technology, specifically to a steel truss segment hoisting balance lifting device. Background Technology

[0002] In the construction of long-span railway bridges, highway bridges, and cross-sea bridges, steel truss girders have become a key choice for main beam structures due to their strong load-bearing capacity, excellent wind resistance, and high structural rigidity. Currently, steel truss girder construction generally adopts a "factory prefabrication of segments + on-site hoisting and splicing" model. The hoisting operation of steel truss girder segments is the core process connecting factory prefabrication and on-site installation, directly determining the project's construction efficiency, installation accuracy, and structural safety performance. During hoisting, lifting equipment (such as gantry cranes and floating cranes) is used to connect the lifting points of the steel truss girder segments, enabling the lifting, translation, and docking with adjacent segments. Its operational stability directly determines the project's construction efficiency, installation accuracy, and final structural safety performance.

[0003] However, during hoisting, the lifting process is susceptible to external factors such as wind disturbances and slight swaying of the lifting equipment, which can disrupt the force balance between the lifting equipment and the steel truss segments. When this force balance is disrupted, the lifting equipment, lacking the ability to adjust its balance, can easily cause the steel truss segments to tilt or sway, leading to imbalances. This can range from minor issues like significant swaying of the segments in the air, increasing the risk of collisions with surrounding structures, to more serious problems like uneven stress on the slings, overload and breakage of some slings, and even the collapse of the steel truss segments.

[0004] Therefore, there is an urgent need to provide a balancing lifting device for steel truss segments to solve the technical problem of the lifting device being prone to imbalance during the lifting process. Utility Model Content

[0005] The purpose of this utility model is to provide a balancing lifting device for steel truss segments, which effectively solves the technical problem of easy imbalance in traditional lifting devices during the lifting process.

[0006] To solve the above-mentioned technical problems, this utility model provides a steel truss segment hoisting and balancing lifting device, including two first lifting rods, a support platform, a rotating mechanism, and a lifting frame connected sequentially from top to bottom; a connecting seat is provided on both sides of the upper end of the support platform; the two first lifting rods are respectively hinged to the two connecting seats; a hydraulic cylinder for adjusting the rotation angle of the first lifting rod is provided on both sides of the first lifting rod; the two ends of the hydraulic cylinder are respectively hinged to the side wall of the first lifting rod and the upper surface of the support platform; an installation groove is opened at the upper end of the support platform between the two connecting seats, and a drive motor is installed in the installation groove. The output shaft of the drive motor is connected to the rotating mechanism; the rotating mechanism can drive the lifting frame to rotate under the drive of the drive motor.

[0007] Preferably, the rotating mechanism includes a fixed sleeve, a rotating rod, a fixed platform, and a rotating assembly; the upper end of the fixed sleeve is connected to the bottom of the support platform; the upper end of the rotating rod is located inside the fixed sleeve, and the lower end of the rotating rod movably passes through the bottom of the fixed sleeve and is connected to the hanger; the rotating sleeve is fixed to the upper end of the rotating rod; the lower end of the fixed platform is located inside the rotating sleeve, and the upper end of the fixed platform is connected to the sleeve at the bottom of the support platform; the rotating assembly is rotatably connected to the bottom of the fixed platform and meshes with a toothed ring on the inner sidewall of the rotating sleeve; the output shaft of the drive motor passes through the sleeve and is connected to the connecting shaft of the fixed platform, and can drive the rotating assembly to rotate;

[0008] The lower end of the rotating sleeve extends downward to form a rotating ring; the lower end of the fixed sleeve extends radially to form a first limiting ring, and the inner sidewall of the first limiting ring is provided with an annular groove corresponding to the rotating ring; the rotating sleeve is slidably connected to the annular groove through the rotating ring.

[0009] Preferably, the bottom of the rotating ring is provided with multiple balls at equal intervals.

[0010] Preferably, the rotating assembly includes a driving gear and three driven gears; the driving gear is disposed at the bottom of the fixed platform and connected to the connecting shaft of the fixed platform; the three driven gears are rotatably connected to the bottom of the fixed platform at equal intervals along the outer periphery of the driving gear, and each of the three gears meshes with the driving gear; the rotating assembly meshes with the gear ring on the inner sidewall of the rotating sleeve through the three driven gears.

[0011] Preferably, a second limiting ring extends radially from the upper end of the rotating sleeve; a limiting groove corresponding to the second limiting ring is provided on the outer peripheral wall of the fixed platform; the rotating sleeve is slidably connected to the limiting groove through the second limiting ring.

[0012] Preferably, the hanger includes a crossbeam, two second hangers, and two crossbars; the crossbeam is connected to the lower end of the rotating rod; the two second hangers are respectively fixed to the bottom ends of the crossbeam; the two crossbars are respectively fixed to the lower ends of the two second hangers along the width direction of the crossbeam; and a connecting rod is provided at the bottom ends of the crossbars.

[0013] Preferably, hinge seats for hinged connection with hydraulic cylinders are respectively provided on the side wall of the first lifting rod and the upper surface of the bearing platform.

[0014] Preferably, a connecting flange is provided at the lower end of the rotating rod, and multiple reinforcing ribs connected to the connecting flange are provided at equal intervals on the outer peripheral wall of the lower end of the rotating rod.

[0015] Preferably, the upper end of the fixed sleeve is provided with a connecting plate for connecting with the support platform.

[0016] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0017] (1) The steel truss segment hoisting balance hoisting device provided by this utility model is equipped with a first hoisting rod, a bearing platform, a rotating mechanism and a hoisting frame. The bearing platform is equipped with a connecting seat and an installation groove, and the installation groove is equipped with a drive motor. Hydraulic cylinders are provided on both sides of the first hoisting rod. Through the cooperation of the above components, the rotation angle of the two first hoisting rods relative to the bearing platform can be adjusted by the hydraulic cylinders, so that the construction personnel can adjust the overall balance of the hoisting device in a timely manner according to the actual weight distribution of the steel truss segment and the hoisting situation on site. This effectively avoids the steel truss segment from tilting during the hoisting process and ensures the stability and safety of the steel truss segment hoisting process. Moreover, the drive motor in the installation groove can drive the rotating mechanism to rotate and simultaneously drive the hoisting frame to rotate, so as to achieve horizontal angle adjustment of the steel truss segment hoisted by the hoisting frame, so as to make the steel truss segment accurately connected with the adjacent structure at the installation position.

[0018] (2) The steel truss segment hoisting balance hoisting device provided by this utility model has a rotating mechanism consisting of a fixed sleeve, a rotating rod, a rotating sleeve, a fixed platform, and a rotating assembly. The lower end of the rotating sleeve is provided with a rotating ring, and the lower end of the fixed sleeve is provided with a first limiting ring. The inner side wall of the first limiting ring is provided with an annular groove. Through the cooperation between the above components, the first limiting ring of the fixed sleeve can provide support for the rotating sleeve, so that the toothed ring on the inner side wall of the rotating sleeve can mesh with the rotating assembly. The rotating ring of the rotating sleeve cooperates with the annular groove, so that the rotating sleeve can rotate around the central axis of the rotating assembly under the drive of the rotating assembly. The rotating rod synchronously drives the hoisting frame to rotate, thereby realizing the horizontal angle adjustment of the steel truss segment hoisted by the hoisting frame. In addition, a sleeve is coaxially provided at the bottom of the bearing platform with the output shaft of the drive motor for installing the fixed platform, so that the output shaft of the drive motor can be connected to the connecting shaft of the fixed platform, thereby driving the rotating assembly to rotate through the connecting shaft of the fixed platform.

[0019] (3) The steel truss segment hoisting balance lifting device provided by this utility model has a second limiting ring at the upper end of the rotating sleeve and a limiting groove on the outer peripheral wall of the fixed platform. Through the cooperation between the second limiting ring and the limiting groove, the connection stability between the toothed ring and the rotating component can be effectively improved, preventing the toothed ring and the rotating component from being misaligned due to the shaking of the rotating rod during the hoisting process, ensuring that the rotating sleeve can operate normally, and further improving the stability and safety of the steel truss segment hoisting process.

[0020] (4) The steel truss segment hoisting balance hoisting device provided by this utility model has a crossbeam, a second hoisting rod and a crossbar. Through the cooperation of the above components, a stable hoisting frame is formed so as to make a stable connection with the steel truss segment, avoid excessive shaking of the steel truss segment during hoisting, improve hoisting balance, and thus ensure the stability and safety of the steel truss segment hoisting process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the prior art and the embodiments of this application, the drawings used in the description of the prior art and the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structural state of a steel truss segment hoisting and balancing device in this utility model.

[0023] Figure 2 This is a schematic diagram of the overall structure of a steel truss segment hoisting and balancing device according to the present invention.

[0024] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0025] Figure 4 This is a partial structural schematic diagram of a steel truss segment hoisting and balancing device according to the present invention.

[0026] Figure 5 for Figure 4 A magnified view of a section at point B in the middle.

[0027] Figure 6 for Figure 4 A magnified view of a section at point C.

[0028] Figure 7 This is a schematic diagram of the rotating mechanism in this utility model.

[0029] Figure 8 This is a schematic diagram of the structure of the fixed sleeve in this utility model.

[0030] Figure 9 This is a schematic diagram of the assembly structure of the rotating sleeve and the rotating rod in this utility model.

[0031] Figure 10 This is a schematic diagram of the assembly structure of the fixed platform and the rotating component in this utility model.

[0032] Explanation of reference numerals in the attached drawings: First lifting rod 10, bearing platform 20, connecting seat 21, mounting groove 22, drive motor 23, sleeve 24, rotating mechanism 30, fixed sleeve 31, first limiting ring 31a, annular slide groove 31b, connecting plate 31c, rotating rod 32, connecting flange 32a, reinforcing rib 32b, rotating sleeve 33, toothed ring 33a, rotating ring 33b, ball bearing 33c, second limiting ring 33d, fixed platform 34, limiting groove 34a, rotating assembly 35, driving gear 35a, driven gear 35b, lifting frame 40, crossbeam 41, second lifting rod 42, crossbar 43, connecting rod 43a, hydraulic cylinder 50, hinge seat 60, steel truss segment 70. Detailed Implementation

[0033] To better understand the purpose, structure, and function of this utility model, the following detailed description, in conjunction with the accompanying drawings, provides a steel truss segment hoisting and balancing lifting device for this utility model, so that those skilled in the art can better understand and implement this utility model. However, the embodiments described are not intended to limit this utility model.

[0034] Please see Figures 1 to 10 As shown in the embodiment of this application, a steel truss segment hoisting balancing device is provided, including two first lifting rods 10, a support platform 20, a rotating mechanism 30, and a hanger 40 connected sequentially from top to bottom; a connecting seat 21 is respectively provided on both sides of the upper end of the support platform 20; the two first lifting rods 10 are respectively hinged to the two connecting seats 21; a hydraulic cylinder 50 for adjusting the rotation angle of the first lifting rod 10 is respectively provided on both sides of the first lifting rod 10; the two ends of the hydraulic cylinder 50 are respectively hinged to the side wall of the first lifting rod 10 and the upper surface of the support platform 20; an installation groove 22 is opened at the upper end of the support platform 20 between the two connecting seats 21, and a drive motor 23 is provided in the installation groove 22. The output shaft of the drive motor 23 is connected to the rotating mechanism 30; the rotating mechanism 30 can drive the hanger 40 to rotate under the drive of the drive motor 23. Among them, the side wall of the first lifting rod 10 and the upper surface of the support platform 20 are respectively provided with hinge seats 60 for hinged to the hydraulic cylinders 50.

[0035] Because the system includes a first lifting rod 10, a support platform 20, a rotating mechanism 30, and a lifting frame 40, and the support platform 20 is equipped with a connecting seat 21 and an installation groove 22, with a drive motor 23 installed in the installation groove 22, and hydraulic cylinders 50 installed on both sides of the first lifting rod 10, the rotation angle of the two first lifting rods 10 relative to the support platform 20 can be adjusted by the hydraulic cylinders 50. This allows construction personnel to adjust the overall balance of the lifting equipment in a timely manner according to the actual weight distribution of the steel truss segment 70 and the on-site lifting conditions, thereby effectively preventing the steel truss segment 70 from tilting during the lifting process and ensuring the stability and safety of the steel truss segment 70 lifting process. Furthermore, the drive motor 23 in the installation groove 22 can drive the rotating mechanism 30 to rotate, and simultaneously drive the lifting frame 40 to rotate, so as to achieve horizontal angle adjustment of the steel truss segment 70 lifted by the lifting frame 40, so as to facilitate precise docking of the steel truss segment 70 with the adjacent structure at the installation position.

[0036] In a preferred embodiment, the rotating mechanism 30 includes a fixed sleeve 31, a rotating rod 32, a rotating sleeve 33, a fixed platform 34, and a rotating assembly 35; the upper end of the fixed sleeve 31 is connected to the bottom of the support platform 20; the upper end of the rotating rod 32 is located inside the fixed sleeve 31, and the lower end of the rotating rod 32 movably passes through the bottom of the fixed sleeve 31 and is connected to the hanger 40; the rotating sleeve 33 is fixed to the upper end of the rotating rod 32; the lower end of the fixed platform 34 is located inside the rotating sleeve 33, and the upper end of the fixed platform 34 is connected to the sleeve 24 at the bottom of the support platform 20; the rotating assembly 35... 5 is rotatably connected to the bottom of the fixed platform 34 and meshes with the toothed ring 33a on the inner side wall of the rotating sleeve 33; the output shaft of the drive motor 23 passes through the sleeve 24 and is connected to the connecting shaft of the fixed platform 34, and can drive the rotating assembly 35 to rotate; a rotating ring 33b extends downward from the lower end of the rotating sleeve 33; a first limiting ring 31a extends radially from the lower end of the fixed sleeve 31, and an annular groove 31b corresponding to the rotating ring 33b is provided on the inner side wall of the first limiting ring 31a; the rotating sleeve 33 is slidably connected to the annular groove 31b through the rotating ring 33b and the annular groove 31b. The rotating assembly 35 includes a driving gear 35a and three driven gears 35b. The driving gear 35a is located at the bottom of the fixed platform 34 and connected to the connecting shaft of the fixed platform 34. The three driven gears 35b are rotatably connected to the bottom of the fixed platform 34 at equal intervals along the outer periphery of the driving gear 35a, and each of the three gears meshes with the driving gear 35a. The rotating assembly 35 meshes with the gear ring 33a on the inner wall of the rotating sleeve 33 through the three driven gears 35b. A connecting flange 32a is provided at the lower end of the rotating rod 32, and multiple reinforcing ribs 32b connected to the connecting flange 32a are provided at equal intervals on the outer periphery of the lower end of the rotating rod 32. A connecting plate 31c for connecting with the support platform 20 is provided at the upper end of the fixed sleeve 31.

[0037] Since the rotating mechanism 30 is provided with a fixed sleeve 31, a rotating rod 32, a rotating sleeve 33, a fixed platform 34, and a rotating assembly 35, and the lower end of the rotating sleeve 33 is provided with a rotating ring 33b, and the lower end of the fixed sleeve 31 is provided with a first limiting ring 31a, and the inner side wall of the first limiting ring 31a is provided with an annular groove 31b, through the cooperation between the above components, the first limiting ring 31a of the fixed sleeve 31 can provide support for the rotating sleeve 33, so that the toothed ring 33a on the inner side wall of the rotating sleeve 33 can mesh with the rotating assembly 35, and through the cooperation between the rotating ring 33b of the rotating sleeve 33 and the annular groove 31b, the rotating sleeve 33 can rotate around the central axis of the rotating assembly 35 under the drive of the rotating assembly 35, and synchronously drive the hanger 40 to rotate through the rotating rod 32, thereby realizing the horizontal angle adjustment of the steel truss segment 70 hoisted by the hanger 40. In addition, a tube 24 is coaxially provided at the bottom of the support platform 20 with the output shaft of the drive motor 23 for mounting the fixed platform 34, so that the output shaft of the drive motor 23 can be connected to the connecting shaft of the fixed platform 34, thereby driving the rotating component 35 to rotate through the connecting shaft of the fixed platform 34.

[0038] In a preferred embodiment, a plurality of balls 33c are evenly spaced at the bottom of the rotating ring 33b. Because the rotating ring 33b has a plurality of balls 33c evenly spaced circumferentially at the bottom, the rotating ring 33b rotates within the annular groove 31b via the balls 33c, allowing the rotating sleeve 33 to rotate more smoothly under the drive of the rotating assembly 35, thereby enabling rapid angle adjustment of the hanger 40.

[0039] In a preferred embodiment, a second limiting ring 33d extends radially from the upper end of the rotating sleeve 33; a limiting groove 34a corresponding to the second limiting ring 33d is provided on the outer peripheral wall of the fixed platform 34; the rotating sleeve 33 is slidably connected to the limiting groove 34a through the second limiting ring 33d.

[0040] Because the upper end of the rotating sleeve 33 is provided with a second limiting ring 33d, and the outer peripheral wall of the fixed platform 34 is provided with a limiting groove 34a, the cooperation between the second limiting ring 33d and the limiting groove 34a can effectively improve the connection stability between the toothed ring 33a and the rotating component 35, prevent the toothed ring 33a from being misaligned with the rotating component 35 due to the shaking of the rotating rod 32 during the hoisting process, ensure that the rotating sleeve 33 can operate normally, and further improve the stability and safety of the hoisting process of the steel truss segment 70.

[0041] In a preferred embodiment, the hanger 40 includes a crossbeam 41, two second hangers 42, and two crossbars 43. The crossbeam 41 is connected to the lower end of the rotating rod 32. The two second hangers 42 are respectively fixed to the bottom ends of the crossbeam 41. The two crossbars 43 are respectively fixed to the lower ends of the two second hangers 42 along the width direction of the crossbeam 41. A connecting rod 43a is provided at each of the bottom ends of the crossbars 43. The lower end of the connecting rod 43a is provided with a fastening hole, which can be directly connected to the mounting flange on the steel truss segment 70, or a clamping component (such as a hook, clamp, etc.) can be installed at the lower end of the connecting rod 43a to connect it to the steel truss segment 70.

[0042] Since the hanger 40 is equipped with a crossbeam 41, a second lifting rod 42, and a crossbar 43, the cooperation between these components forms a stable hanger 40, which can be stably connected to the steel truss segment 70, avoid excessive swaying of the steel truss segment 70 during hoisting, improve hoisting balance, and thus ensure the stability and safety of the steel truss segment 70 during hoisting.

[0043] In this embodiment, a steel truss segment lifting and balancing device is provided. First, the connecting rod 43a is connected to the steel truss segment 70. Then, the first lifting rod 10 is connected to the lifting equipment (not shown in the figure), and the steel truss segment 70 is lifted using the lifting equipment. During the lifting process, the hydraulic cylinder 50 is adjusted in a timely manner to maintain the overall balance of the lifting device. Simultaneously, the drive motor 23 is controlled to rotate the rotating mechanism 30, which in turn rotates the lifting frame 40, thereby adjusting the horizontal angle of the steel truss segment 70 until it can be precisely aligned with the adjacent structure.

[0044] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A steel truss segment hoist balanced spreader characterized by, The system includes two first lifting rods (10), a support platform (20), a rotating mechanism (30), and a hanger (40) connected sequentially from top to bottom. A connecting seat (21) is provided on both sides of the upper end of the support platform (20). The two first lifting rods (10) are hinged to the two connecting seats (21). A hydraulic cylinder (50) for adjusting the rotation angle of the first lifting rod (10) is provided on both sides of the first lifting rod (10). The two ends of the hydraulic cylinder (50) are hinged to the side wall of the first lifting rod (10) and the upper surface of the support platform (20). An installation groove (22) is opened at the upper end of the support platform (20) between the two connecting seats (21). A drive motor (23) is provided in the installation groove (22). The output shaft of the drive motor (23) is connected to the rotating mechanism (30). The rotating mechanism (30) can drive the hanger (40) to rotate under the drive of the drive motor (23).

2. The steel truss segment hoist balanced spreader of claim 1, wherein, The rotating mechanism (30) includes a fixed sleeve (31), a rotating rod (32), a rotating sleeve (33), a fixed platform (34), and a rotating assembly (35); the upper end of the fixed sleeve (31) is connected to the bottom of the support platform (20); the upper end of the rotating rod (32) is located inside the fixed sleeve (31), and the lower end of the rotating rod (32) movably passes through the bottom of the fixed sleeve (31) and is connected to the hanger (40); the rotating sleeve (33) is fixed to the rotating rod (32). The upper end of the fixed platform (34) is located inside the rotating sleeve (33), and the upper end of the fixed platform (34) is connected to the sleeve (24) at the bottom of the bearing platform (20); the rotating component (35) is rotatably connected to the bottom of the fixed platform (34) and meshes with the toothed ring (33a) on the inner side wall of the rotating sleeve (33); the output shaft of the drive motor (23) passes through the sleeve (24) and is connected to the connecting shaft of the fixed platform (34), and can drive the rotating component (35) to rotate; The lower end of the rotating sleeve (33) extends downward to form a rotating ring (33b); the lower end of the fixed sleeve (31) extends radially to form a first limiting ring (31a), and the inner sidewall of the first limiting ring (31a) is provided with an annular groove (31b) corresponding to the rotating ring (33b); the rotating sleeve (33) is slidably connected to the annular groove (31b) through the rotating ring (33b).

3. The steel truss segment hoist balanced spreader of claim 2, wherein, The bottom of the rotating ring (33b) is provided with multiple balls (33c) at equal intervals.

4. The steel truss segment hoist balanced spreader of claim 2, wherein, The rotating assembly (35) includes a driving gear (35a) and three driven gears (35b); the driving gear (35a) is disposed at the bottom of the fixed platform (34) and connected to the connecting shaft of the fixed platform (34); the three driven gears (35b) are rotatably connected to the bottom of the fixed platform (34) at equal intervals along the outer periphery of the driving gear (35a), and each of the three gears meshes with the driving gear (35a); the rotating assembly (35) meshes with the toothed ring (33a) on the inner wall of the rotating sleeve (33) through the three driven gears (35b).

5. The steel truss girder segment hoisting balance lifting device according to claim 2, characterized in that, The upper end of the rotating sleeve (33) extends radially with a second limiting ring (33d); the outer peripheral wall of the fixed platform (34) is provided with a limiting groove (34a) corresponding to the second limiting ring (33d); the rotating sleeve (33) is slidably connected to the limiting groove (34a) through the second limiting ring (33d).

6. The steel truss segment lifting and balancing device according to any one of claims 2 to 5, characterized in that, The hanger (40) includes a crossbeam (41), two second hangers (42) and two crossbars (43); the crossbeam (41) is connected to the lower end of the rotating rod (32); the two second hangers (42) are respectively fixed to the bottom ends of the crossbeam (41); the two crossbars (43) are respectively fixed to the lower ends of the two second hangers (42) along the width direction of the crossbeam (41); a connecting rod (43a) is respectively provided at the bottom ends of the crossbars (43).

7. The steel truss girder segment hoisting balance lifting device according to claim 6, characterized in that, The first boom (10) and the upper surface of the support platform (20) are respectively provided with hinge seats (60) for hinged to the hydraulic cylinder (50).

8. The steel truss girder segment hoisting balance lifting device according to claim 2, characterized in that, The lower end of the rotating rod (32) is provided with a connecting flange (32a), and a plurality of reinforcing ribs (32b) connected to the connecting flange (32a) are provided at equal intervals on the outer peripheral wall of the lower end of the rotating rod (32).

9. The steel truss girder segment hoisting balance lifting device according to claim 2, characterized in that, The upper end of the fixed sleeve (31) is provided with a connecting plate (31c) for connecting with the support platform (20).

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