Multifunctional bridge girder erection machine for mounting suspension bridge steel girder

Abstract

The utility model discloses a multifunctional bridge girder erection machine used for installing a suspension bridge steel girder, which comprises a main truss mechanism, a supporting mechanism, a hoisting mechanism and a walking mechanism, the supporting mechanism comprises a front supporting leg, a middle supporting leg and a rear supporting leg which are sequentially arranged at the bottom of the main truss mechanism from front to back; the front supporting leg comprises a front supporting leg part and a front cross beam which are sequentially arranged from top to bottom, the front supporting leg part is of a length-adjustable retractable structure, the top of the front supporting leg part is hinged to the front portion of the bottom face of the main truss mechanism, and the bottom of the front supporting leg part is fixedly connected with the top face of the front cross beam. The top face of the front cross beam is further detachably connected with a permanent suspender of the suspension bridge through a pin shaft, the hoisting mechanism is movably arranged on the top of the main truss mechanism through a crown block, and the lower portion of the hoisting mechanism is connected with a rotary lifting appliance. The problems that a front supporting leg structure of an existing bridge girder erection machine is not suitable for suspension bridge erection, and an existing lifting appliance is generally a fixed lifting appliance and cannot adjust the direction and the lifting angle of a lifting component are solved.

Description

Technical Field

[0001] The utility model relates to the field of bridge erection devices, in particular to a multifunctional bridge erection machine used for installing steel main beams of suspension bridges. Background Art

[0002] In the existing bridge construction process, a bridge-building machine is usually used to build the bridge. The bridge-building machine has a simple structure and is easy to use. It is usually composed of a main truss, front legs, middle legs, rear legs and a lifting mechanism. The front legs, middle legs and rear legs are respectively arranged at the front, middle and rear of the bottom surface of the main truss.

[0003] The existing bridge erection machine has the following main problems when in use. The first is that the bridge erection machine in the prior art is mainly used for ordinary bridge construction rather than suspension bridge. When an ordinary bridge is erected, the front support leg moves forward with the main truss to a predetermined position, and the bottom is connected to the pier to play a supporting role. However, a suspension bridge has no piers when erected. Therefore, the front support mechanism of the existing bridge erection machine needs to be improved to adapt to the erection of a suspension bridge so that it can bear the weight of the bridge erection machine together with the middle support leg when the steel truss beam section is installed. The second is that the sling structure in the prior art is simple and its The connection to the winch is also a fixed connection, so during the lifting process, the components can only be in a horizontal state, and the lifting direction and lifting angle of the frame cannot be adjusted. In this way, during the lifting process, the components may be obstructed due to the setting of some construction auxiliary facilities, which will slow down the construction progress. Moreover, after being lifted to the designated position, the components will shake, and the fixed lifting equipment cannot affect the shaking and adjust it in time. Therefore, not only is the stability during the lifting process poor, but the shaking cannot be adjusted and prevented in time after being lifted to the designated position, affecting construction efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a multifunctional bridge-erecting machine for installing the steel main beam of a suspension bridge, so as to solve the problems that the front support leg structure of the existing bridge-erecting machine is not suitable for erecting a suspension bridge and that the existing hoisting tools are generally fixed hoists that cannot adjust the direction and hoisting angle of the hoisted components.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A multifunctional bridge-erecting machine for installing the steel main beam of a suspension bridge comprises a main truss mechanism, a supporting mechanism, a lifting mechanism and a traveling mechanism, wherein the supporting mechanism comprises a front support leg, a middle support leg and a rear support leg which are arranged in sequence from front to back at the bottom of the main truss mechanism, the front support leg comprises a front support leg portion and a front cross beam which are arranged in sequence from top to bottom, the front support leg portion is a retractable structure with adjustable length, the top of the front support leg portion is hinged to the front portion of the bottom surface of the main truss mechanism, and the bottom of the front support leg portion is fixedly connected to the top surface of the front cross beam, the top surface of the front cross beam is also detachably connected to the permanent hanger of the suspension bridge via a pin shaft, the lifting mechanism is arranged on the top of the main truss mechanism by means of an overhead crane, and the lower part of the lifting mechanism is connected to a rotating sling.

[0007] A front crossbeam is arranged between the front support legs, and the top surface of the front crossbeam can be detachably connected to the permanent hanger of the suspension bridge through a pin shaft, so that the permanent hanger of the suspension bridge is utilized, making it a front fulcrum support. When the bridge erection machine erects the beam, this structure and the middle support leg together constitute a simply supported system, which can jointly bear the weight of the bridge erection machine when erecting the beam, thereby increasing the lifting capacity. Since the length of the permanent hanger of the suspension bridge is inconsistent, the height of the front crossbeam needs to be adjusted, and the adjustment of the front crossbeam height is achieved by adjusting the length of the front support leg, which has good adaptability; and in order to be able to adjust the direction and lifting angle of the lifting component, a rotating sling is provided, and the posture of the main beam segment during the lifting process can be adjusted by the rotating sling, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, and the component can be quickly stabilized after lifting, which is more efficient.

[0008] As a further optimization of the present invention, the main truss mechanism adopts a triangular truss structure, the upper and lower chords of the main truss mechanism adopt double H-shaped steel, the web members and diagonal members adopt rectangular tubes, the entire section of the main truss mechanism is transported to the site for assembly, and the connection parts of the main cross mechanism segments are connected by a stable connection mechanism.

[0009] The main truss structure is 54m long, 5.3m high and 2.0m wide at the center. The main truss structure adopts 8m / segment, and the center distance between the two main trusses of the main truss structure is 20m.

[0010] As a further preference of the present invention, the stabilizing connection mechanism includes an end plate and a nut connection pad, the end plate is arranged at the end face of the upper chord and the lower chord of the main truss mechanism, and the nut connection pad is arranged on the side wall of the upper chord and the lower chord of the main truss mechanism, the direction in which the nut connection pad is arranged is perpendicular to the side wall of the upper chord and the lower chord of the main truss mechanism, the position in which the nut connection pad is arranged is close to the end plate, and the segments of two adjacent main truss mechanisms are detachably connected by a screw arranged in the middle of the nut connection pad and nuts at both ends of the screw.

[0011] The top surface of the end plate on the upper chord is flush with the top surface of the upper chord; there are no less than three screws connected to each nut connection plate from top to bottom; since the end plates are arranged at the end surfaces of the upper chord and the lower chord of the main truss mechanism, the contact surface between the two main truss mechanism segments is highly flat, and then nut plates are arranged on the side walls of the upper chord and the lower chord of the main truss mechanism. The two adjacent main truss mechanism segments can be tightened and connected by the screw arranged in the middle of the nut connection plate and the nuts at both ends of the screw. After the nuts are tightened, the smooth fit between the end plates can make the connection structure more stable.

[0012] As a further preference of the present invention, a stiffening plate arranged perpendicular to the nut connecting plate is further provided on the inner side of the nut connecting plate, and the other end of the stiffening plate is connected to the end plate.

[0013] Each nut connection plate is connected to no less than two stiffening plates from top to bottom, which increases the strength.

[0014] As a further preferred embodiment of the present invention, the front support leg includes a sliding upper frame and a fixed lower frame arranged in sequence from top to bottom, the lower part of the sliding upper frame is provided with a first hydraulic cylinder, and the lower part of the fixed lower frame is provided with a pressure bearing mechanism, the hydraulic rod of the first hydraulic cylinder is arranged vertically downward, and the bottom of the hydraulic rod of the first hydraulic cylinder is connected to the center of the top of the pressure bearing mechanism; the sliding upper frame is composed of vertically arranged sleeved circular pipe columns and steel members, the steel members are arranged between the sleeved circular pipe columns, the first hydraulic cylinder is arranged at the center position of the bottom of the structure formed by the steel members, the fixed lower frame is composed of plug-in circular pipe columns, the pressure bearing mechanism is arranged between the plug-in circular pipe columns, and the upper part of the plug-in circular pipe column is plugged into the lower part of the sleeved circular pipe column; the lower part of the front end of the sleeved circular pipe column is also provided with an oblique brace, the oblique brace is arranged forward and inclined upward, and the top of the oblique brace is hinged to the bottom surface of the main truss mechanism.

[0015] The first hydraulic cylinder can conveniently and quickly control the extension and retraction of the front support leg. Such a telescopic support structure is simple and has good stability. The provision of diagonal braces can better support the main truss mechanism.

[0016] As a further preferred embodiment of the present invention, the middle support leg and the rear support leg both include an electric roller support, a middle and rear support leg portion and a middle and rear cross beam arranged in sequence from top to bottom, the middle and rear cross beam includes a fixed section and a horizontal extension section, the horizontal extension section is slidably arranged on both sides of the fixed section, the bottom of the middle and rear support leg portion is connected to both sides of the top surface of the fixed section, a vertical jack is provided in the middle of the bottom surface of the fixed section, and an outer end support structure is provided on the outer side of the bottom surface of the horizontal extension section.

[0017] The vertical force on the middle support point is transmitted to the middle rear crossbeam through the middle rear support leg, and the middle rear crossbeam is transmitted to the main longitudinal beams and the middle longitudinal beam on both sides of the main beam through the vertical jack. The middle rear crossbeam is set to a structure with adjustable length, which avoids the middle rear support leg from colliding with the installed boom when moving or crossing the span, and at the same time makes the distribution of the vertical force transmitted by the middle support leg to the main beam more reasonable.

[0018] As a further preferred embodiment of the present invention, the fixed section is a hollow steel member with a box-shaped cross-section, and the horizontal extension section is a steel member with an H-shaped cross-section. The inner end of the horizontal extension section is inserted into the hollow cavity of the fixed section. A second hydraulic cylinder is also provided in the hollow cavity of the fixed section, and the output shaft of the second hydraulic cylinder is connected to the inner end face of the horizontal extension section.

[0019] The second hydraulic cylinder can be used to conveniently and quickly control the deployment and folding of the horizontal extension section.

[0020] As a further preferred embodiment of the present invention, the lifting mechanism is a lifting winch.

[0021] As a further preference of the present invention, the rotating sling includes a horizontal rotation connection mechanism, a vertical longitudinal axis rotation connection seat, a sling longitudinal beam, a vertical transverse axis rotation connection seat and a sling crossbeam, the horizontal rotation mechanism includes a steel cable connection part and a rotation sleeve part arranged in sequence from top to bottom, the steel cable connection part is connected to the steel cable of the winch mechanism, the rotation sleeve part is horizontally rotatably sleeved on the lower part of the steel cable connection part, the vertical longitudinal axis rotation connection seat is arranged at the lower part of the rotation sleeve part, the bottom of the vertical longitudinal axis rotation connection seat is rotationally connected to the middle part of the sling longitudinal beam, and the two sides of the vertical longitudinal axis rotation connection seat are provided with longitudinal beam angle adjustment hydraulic adjustment mechanisms, the vertical transverse axis rotation connection seat is arranged at the bottom of the sling longitudinal beam, the bottom of the vertical transverse axis rotation connection seat is rotationally connected to the middle part of the sling crossbeam, and the two sides of the sling longitudinal beam are provided with crossbeam angle hydraulic adjustment mechanisms.

[0022] The bottom of the steel cable connecting part is provided with a rotating motor, the output shaft of the rotating motor is arranged downward, and the middle of the output shaft of the rotating motor is provided with an active tooth, and the upper part of the inner wall of the rotating sleeve is provided with an annular tooth row opposite to the active tooth, and the active tooth is meshed with the annular tooth row, and the rotating sleeve part can be quickly rotated by rotating the rotating motor, thereby guiding the crossbeam and longitudinal beam of the sling to rotate in the horizontal direction; the horizontal orientation of the component can be adjusted by the horizontal rotation mechanism, and it can be rotated 90 degrees in the horizontal direction, which can realize the horizontal transportation of the steel truss main beam segment and then rotate it to the longitudinal installation. Such lifting can avoid some construction auxiliary facilities and the lifting is more efficient. Then the longitudinal angle of the lifting component can be adjusted by the longitudinal beam angle adjustment hydraulic adjustment mechanism, and the transverse angle of the lifting component can be adjusted by the cross beam angle adjustment hydraulic adjustment mechanism. In this way, the posture of the main beam segment can be adjusted during the lifting process, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, the component can be quickly stabilized after lifting, and the efficiency is higher.

[0023] As a further preference of the present invention, the hydraulic adjustment mechanism for adjusting the longitudinal beam angle includes a longitudinal beam adjusting hydraulic cylinder, the top of the longitudinal beam adjusting hydraulic cylinder is rotatably connected to the side wall of the vertical longitudinal axis rotation connecting seat, and the output shaft of the longitudinal beam hydraulic cylinder is tilted downward and rotatably connected to the top surface of the sling longitudinal beam; the hydraulic adjustment mechanism for adjusting the crossbeam angle includes a crossbeam adjusting hydraulic cylinder, the top of the crossbeam adjusting hydraulic cylinder is rotatably connected to the side wall of the crossbeam of the sling, and the output shaft of the crossbeam hydraulic cylinder is tilted downward and rotatably connected to the top surface of the crossbeam of the sling, and lifting lugs are provided on both sides of the bottom of the crossbeam.

[0024] The two longitudinal beam adjustment hydraulic cylinders on both sides of the longitudinal rotation seat can easily and quickly adjust the angle of the longitudinal beam of the spreader, thereby adjusting the longitudinal angle of the suspended component, with a maximum adjustment range of 5%; the two cross beam adjustment hydraulic cylinders on both sides of the longitudinal beam can easily and quickly adjust the angle of the cross beam of the spreader, thereby adjusting the cross angle of the suspended component, with a maximum adjustment range of 5%.

[0025] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0026] 1. A front crossbeam is set between the front support legs, and the top surface of the front crossbeam can be detachably connected to the permanent hanger of the suspension bridge through a pin shaft. In this way, the permanent hanger of the suspension bridge is utilized, making it a front fulcrum support. When the bridge machine erects the beam, this structure and the middle support leg together constitute a simply supported system, which can jointly bear the weight of the bridge machine when erecting the beam, thereby increasing the lifting capacity. Since the length of the permanent hanger of the suspension bridge is inconsistent, the height of the front crossbeam needs to be adjusted, and the adjustment of the front crossbeam height is achieved by adjusting the length of the front support leg, which has good adaptability. In order to be able to adjust the direction and lifting angle of the lifting component, a rotating sling is set. The rotating sling can realize the adjustment of the posture of the main beam segment during the lifting process, and the positioning, adjustment and adjustment are convenient, the lifting process is more stable, the component can be quickly stabilized after lifting, and the efficiency is higher.

[0027] 2. The top surface of the end plate on the upper chord is flush with the top surface of the upper chord; there are no less than three screws connected to each nut connection plate from top to bottom; since the end plates are set at the end surfaces of the upper chord and the lower chord of the main truss mechanism, the contact surface between the two main truss mechanism segments is highly flat, and then nut plates are set on the side walls of the upper chord and the lower chord of the main truss mechanism. The two adjacent main truss mechanism segments can be tightened and connected by the screw set in the middle of the nut connection plate and the nuts at both ends of the screw. After the nuts are tightened, the flat fit between the end plates can make the connection structure more stable.

[0028] 3. Each nut connection plate is connected to no less than two stiffening plates from top to bottom, which increases the strength.

[0029] 4. The first hydraulic cylinder can quickly and easily control the extension and retraction of the front support leg. Such a telescopic support structure is simple and stable, and the diagonal brace can better support the main truss mechanism.

[0030] 5. The vertical force on the middle support point is transmitted to the middle rear crossbeam through the middle rear support leg, and the middle rear crossbeam is transmitted to the main longitudinal beams and the middle longitudinal beam on both sides of the main beam through the vertical jack. The middle rear crossbeam is set to a structure with adjustable length, which avoids the middle rear support leg from colliding with the installed boom when moving or crossing the span, and at the same time makes the distribution of the vertical force transmitted by the middle support leg to the main beam more reasonable.

[0031] 6. The second hydraulic cylinder can be used to conveniently and quickly control the expansion and folding of the horizontal extension section.

[0032] 7. A rotating motor is provided at the bottom of the steel cable connecting part, and the output shaft of the rotating motor is arranged downwardly, and an active tooth is provided in the middle of the output shaft of the rotating motor. An annular tooth row is provided on the upper part of the inner wall of the rotating sleeve part opposite to the active tooth, and the active tooth is meshed with the annular tooth row. The rotating sleeve part can be quickly rotated by the rotation of the rotating motor, thereby guiding the crossbeam and longitudinal beam of the sling to rotate in the horizontal direction; the horizontal orientation of the component can be adjusted by the horizontal rotation mechanism, and it can be rotated 90 degrees in the horizontal direction, which can realize the horizontal transportation of the steel truss main beam segment and then rotate it to the longitudinal installation. Such lifting can avoid some construction auxiliary facilities and the lifting is more efficient. Then the longitudinal angle of the lifting component can be adjusted by the longitudinal beam angle adjustment hydraulic adjustment mechanism, and the transverse angle of the lifting component can be adjusted by the cross beam angle adjustment hydraulic adjustment mechanism. In this way, the posture of the main beam segment can be adjusted during the lifting process, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, the component can be quickly stabilized after lifting, and the efficiency is higher.

[0033] 8. The two longitudinal beam adjustment hydraulic cylinders on both sides of the longitudinal rotating seat can quickly and easily adjust the angle of the longitudinal beam of the spreader, thereby adjusting the longitudinal angle of the suspended component, with a maximum adjustment range of 5%; the two cross beam adjustment hydraulic cylinders on both sides of the longitudinal beam can quickly and easily adjust the angle of the cross beam of the spreader, thereby adjusting the cross angle of the suspended component, with a maximum adjustment range of 5%. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural diagram of the present utility model.

[0035] Figure 2 It is a structural schematic diagram of the main truss mechanism of the present utility model.

[0036] Figure 3 It is a structural schematic diagram of the stable connection mechanism of the utility model.

[0037] Figure 4 It is a structural schematic diagram of the front supporting legs of the present utility model.

[0038] Figure 5 for Figure 4 side view.

[0039] Figure 6 It is a schematic structural diagram of the middle supporting legs and rear supporting legs of the present invention.

[0040] Figure 7 for Figure 6 side view.

[0041] Figure 8 It is a structural schematic diagram of the rotary sling of the utility model.

[0042] Figure 9 for Figure 8side view. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0047] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances. Specific embodiment 1:

[0050] Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 A multifunctional bridge-erecting machine for installing the steel main beam of a suspension bridge is shown, which includes a main truss mechanism, a supporting mechanism, a lifting mechanism and a walking mechanism. The supporting mechanism includes a front support leg 1, a middle support leg 2 and a rear support leg 3 arranged in sequence from front to back at the bottom of the main truss mechanism. The front support leg 1 includes a front support leg part 11 and a front cross beam 12 arranged in sequence from top to bottom. The front support leg part 11 is a retractable structure with adjustable length. The top of the front support leg part 11 is hinged to the front part of the bottom surface of the main truss mechanism, and the bottom of the front support leg part 11 is fixedly connected to the top surface of the front cross beam 12. The top surface of the front cross beam 12 is also detachably connected to the permanent hanger 4 of the suspension bridge through a pin shaft. The lifting mechanism is arranged on the top of the main truss mechanism by moving the overhead crane, and the lower part of the lifting mechanism is connected to a rotating sling 5.

[0051] A front crossbeam is arranged between the front support legs, and the top surface of the front crossbeam can be detachably connected to the permanent hanger of the suspension bridge through a pin shaft, so that the permanent hanger of the suspension bridge is utilized, making it a front fulcrum support. When the bridge erection machine erects the beam, this structure and the middle support leg together constitute a simply supported system, which can jointly bear the weight of the bridge erection machine when erecting the beam, thereby increasing the lifting capacity. Since the length of the permanent hanger of the suspension bridge is inconsistent, the height of the front crossbeam needs to be adjusted, and the adjustment of the front crossbeam height is achieved by adjusting the length of the front support leg, which has good adaptability; and in order to be able to adjust the direction and lifting angle of the lifting component, a rotating sling is provided, and the posture of the main beam segment during the lifting process can be adjusted by the rotating sling, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, and the component can be quickly stabilized after lifting, which is more efficient. Specific embodiment 2:

[0053] This embodiment further explains the main truss mechanism based on the specific embodiment 1. The main truss mechanism adopts a triangular truss structure. The upper and lower chords of the main truss mechanism adopt double H-shaped steel, and the web members and diagonal members adopt rectangular tubes. The entire section of the main truss mechanism is transported to the site for assembly, and the connection parts of the main cross mechanism segments are connected by a stable connection mechanism 6.

[0054] The main truss structure is 54m long, 5.3m high and 2.0m wide at the center. The main truss structure adopts 8m / segment, and the center distance between the two main trusses of the main truss structure is 20m. Specific embodiment 3:

[0056] This embodiment further illustrates the stabilizing connection mechanism 6 on the basis of the specific embodiment 2. The stabilizing connection mechanism 6 includes an end plate 61 and a nut connection pad 62. The end plate 61 is arranged at the end faces of the upper chord and the lower chord of the main truss mechanism, and the nut connection pad 62 is arranged on the side walls of the upper chord and the lower chord of the main truss mechanism. The direction in which the nut connection pad 62 is arranged is perpendicular to the side walls of the upper chord and the lower chord of the main truss mechanism. The nut connection pad 62 is arranged close to the end plate 61. The segments of two adjacent main truss mechanisms are detachably connected by a screw arranged in the middle of the nut connection pad 62 and nuts at both ends of the screw.

[0057] The top surface of the end plate on the upper chord is flush with the top surface of the upper chord; there are no less than three screws connected to each nut connection plate from top to bottom; since the end plates are arranged at the end surfaces of the upper chord and the lower chord of the main truss mechanism, the contact surface between the two main truss mechanism segments is highly flat, and then nut plates are arranged on the side walls of the upper chord and the lower chord of the main truss mechanism. The two adjacent main truss mechanism segments can be tightened and connected by the screw arranged in the middle of the nut connection plate and the nuts at both ends of the screw. After the nuts are tightened, the smooth fit between the end plates can make the connection structure more stable. Specific embodiment 4:

[0059] This embodiment further explains the nut connection pad 62 based on specific embodiment 3. The inner side of the nut connection pad 62 is further provided with a stiffening plate 63 arranged perpendicular to the nut connection pad 62, and the other end of the stiffening plate 63 is connected to the end plate 61.

[0060] Each nut connection plate is connected to no less than two stiffening plates from top to bottom, which increases the strength. Specific embodiment 5:

[0062] This embodiment further describes the front leg portion 11 based on the specific embodiment 1. The front leg portion 11 includes a sliding upper frame 111 and a fixed lower frame 112 arranged in sequence from top to bottom. The lower part of the sliding upper frame 111 is provided with a first hydraulic cylinder 113, and the lower part of the fixed lower frame 112 is provided with a pressure receiving mechanism 114. The hydraulic rod of the first hydraulic cylinder 113 is vertically downwardly arranged, and the bottom of the hydraulic rod of the first hydraulic cylinder 113 is connected to the center of the top of the pressure receiving mechanism 114; the sliding upper frame 111 It is composed of vertically arranged sleeved circular tubular columns and steel members, the steel members are arranged between the sleeved circular tubular columns, the first hydraulic cylinder 113 is arranged at the center position of the bottom of the structure formed by the steel members, the fixed lower frame 112 is composed of plug-in circular tubular columns, the pressure bearing mechanism 114 is arranged between the plug-in circular tubular columns, and the upper part of the plug-in circular tubular column is plugged into the lower part of the sleeved circular tubular column; the lower part of the front end of the sleeved circular tubular column is also provided with an oblique brace 115, the oblique brace 115 is arranged to tilt forward and upward, and the top of the oblique brace 115 is hinged to the bottom surface of the main truss mechanism.

[0063] The first hydraulic cylinder can conveniently and quickly control the extension and retraction of the front support leg. Such a telescopic support structure is simple and has good stability. The provision of diagonal braces can better support the main truss mechanism. Specific embodiment 6:

[0065] This embodiment further explains the middle leg 2 and the rear leg 3 on the basis of the specific embodiment 1. The middle leg 2 and the rear leg 3 both include an electric roller support, a middle rear leg portion and a middle rear cross beam arranged in sequence from top to bottom. The middle rear cross beam includes a fixed section 7 and a horizontal extension section 8. The horizontal extension section 8 is slidably arranged on both sides of the fixed section 7. The bottom of the middle rear leg portion is connected to both sides of the top surface of the fixed section 7. A vertical jack 71 is provided in the middle of the bottom surface of the fixed section 7. An outer end support structure 81 is provided on the outer side of the bottom surface of the horizontal extension section 8.

[0066] The vertical force on the middle support point is transmitted to the middle rear crossbeam through the middle rear support leg, and the middle rear crossbeam is transmitted to the main longitudinal beams and the middle longitudinal beam on both sides of the main beam through the vertical jack. The middle rear crossbeam is set to a structure with adjustable length, which avoids the middle rear support leg from colliding with the installed boom when moving or crossing the span, and at the same time makes the distribution of the vertical force transmitted by the middle support leg to the main beam more reasonable. Specific embodiment 7:

[0068] This embodiment further illustrates the fixed section 7 based on the specific embodiment 6. The fixed section 7 is a hollow steel member with a box-shaped cross-section, and the horizontal extension section 8 is a steel member with an H-shaped cross-section. The inner end of the horizontal extension section 8 is inserted into the hollow cavity of the fixed section 7. A second hydraulic cylinder 72 is also provided in the hollow cavity of the fixed section 7, and the output shaft of the second hydraulic cylinder 72 is connected to the inner end face of the horizontal extension section 8.

[0069] The second hydraulic cylinder can be used to conveniently and quickly control the deployment and folding of the horizontal extension section. Specific embodiment 8:

[0071] This embodiment further illustrates the lifting mechanism based on the specific embodiment 1, and the lifting mechanism is a lifting winch. Specific embodiment 9:

[0073] This embodiment further illustrates the rotating spreader 5 on the basis of the specific embodiment 1. The rotating spreader 5 includes a horizontal rotation connection mechanism 51, a vertical longitudinal axis rotation connection seat 52, a spreader longitudinal beam 53, a vertical transverse axis rotation connection seat 54 and a spreader crossbeam 55. The horizontal rotation mechanism 51 includes a steel cable connection portion 511 and a rotation sleeve portion 512 arranged in sequence from top to bottom. The steel cable connection portion 511 is connected to the steel cable of the hoisting mechanism, and the rotation sleeve portion 512 is horizontally rotated and sleeved on the steel cable connection portion 511. 1, the vertical longitudinal axis rotation connecting seat 52 is arranged at the lower part of the rotating sleeve portion 512, the bottom of the vertical longitudinal axis rotation connecting seat 52 is rotatably connected to the middle part of the spreader longitudinal beam, and hydraulic adjustment mechanisms for adjusting the longitudinal beam angle are provided on both sides of the vertical longitudinal axis rotation connecting seat 52, and the vertical transverse axis rotation connecting seat 54 is arranged at the bottom of the spreader longitudinal beam 53, and the bottom of the vertical transverse axis rotation connecting seat 54 is rotatably connected to the middle part of the spreader cross beam 55, and hydraulic adjustment mechanisms for the cross beam angle are provided on both sides of the spreader longitudinal beam 53.

[0074] The bottom of the steel cable connecting part is provided with a rotating motor, the output shaft of the rotating motor is arranged downward, and the middle of the output shaft of the rotating motor is provided with an active tooth, and the upper part of the inner wall of the rotating sleeve is provided with an annular tooth row opposite to the active tooth, and the active tooth is meshed with the annular tooth row, and the rotating sleeve part can be quickly rotated by rotating the rotating motor, thereby guiding the crossbeam and longitudinal beam of the sling to rotate in the horizontal direction; the horizontal orientation of the component can be adjusted by the horizontal rotation mechanism, and it can be rotated 90 degrees in the horizontal direction, which can realize the horizontal transportation of the steel truss main beam segment and then rotate it to the longitudinal installation. Such lifting can avoid some construction auxiliary facilities and the lifting is more efficient. Then the longitudinal angle of the lifting component can be adjusted by the longitudinal beam angle adjustment hydraulic adjustment mechanism, and the transverse angle of the lifting component can be adjusted by the cross beam angle adjustment hydraulic adjustment mechanism. In this way, the posture of the main beam segment can be adjusted during the lifting process, and positioning, adjustment and adjustment are convenient, the lifting process is more stable, the component can be quickly stabilized after lifting, and the efficiency is higher. Specific embodiment 10:

[0076] This embodiment further explains the hydraulic adjustment mechanism for adjusting the longitudinal beam angle on the basis of the specific embodiment 9. The hydraulic adjustment mechanism for adjusting the longitudinal beam angle includes a longitudinal beam adjusting hydraulic cylinder, the top of which is rotationally connected to the side wall of the vertical longitudinal axis rotation connection seat 52, and the output shaft of the longitudinal beam hydraulic cylinder is tilted downward and rotationally connected to the top surface of the sling longitudinal beam 53; the hydraulic adjustment mechanism for adjusting the crossbeam angle includes a crossbeam adjusting hydraulic cylinder, the top of which is rotationally connected to the side wall of the sling longitudinal beam 53, and the output shaft of the crossbeam hydraulic cylinder is tilted downward and rotationally connected to the top surface of the sling crossbeam 55, and lifting ear plates 9 are provided on both sides of the bottom of the sling crossbeam 55.

[0077] The two longitudinal beam adjustment hydraulic cylinders on both sides of the longitudinal rotation seat can easily and quickly adjust the angle of the longitudinal beam of the spreader, thereby adjusting the longitudinal angle of the suspended component, with a maximum adjustment range of 5%; the two cross beam adjustment hydraulic cylinders on both sides of the longitudinal beam can easily and quickly adjust the angle of the cross beam of the spreader, thereby adjusting the cross angle of the suspended component, with a maximum adjustment range of 5%.

[0078] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multifunctional bridge erection machine for installing steel main beams of suspension bridges, characterized by: The invention comprises a main truss mechanism, a supporting mechanism, a lifting mechanism and a walking mechanism, wherein the supporting mechanism comprises a front support leg (1), a middle support leg (2) and a rear support leg (3) which are arranged at the bottom of the main truss mechanism in sequence from front to back, the front support leg (1) comprises a front support leg portion (11) and a front cross beam (12) which are arranged in sequence from top to bottom, the front support leg portion (11) is a retractable structure with adjustable length, the top of the front support leg portion (11) is hinged to the front part of the bottom surface of the main truss mechanism, the bottom of the front support leg portion (11) is fixedly connected to the top surface of the front cross beam (12), the top surface of the front cross beam (12) is also detachably connected to the permanent suspender (4) of the suspension bridge through a pin shaft, the lifting mechanism is arranged at the top of the main truss mechanism by means of a gantry crane, and the lower part of the lifting mechanism is connected to a rotating sling (5).

2. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 1, characterized in that: The main truss mechanism adopts a triangular truss structure, the upper and lower chords of the main truss mechanism adopt double H-shaped steel, the web members and diagonal members adopt rectangular tubes, the entire section of the main truss mechanism is transported to the site for assembly, and the connection parts of the main cross mechanism sections are connected by a stable connection mechanism (6).

3. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 2, characterized in that: The stabilizing connection mechanism (6) comprises an end plate (61) and a nut connection pad (62), wherein the end plate (61) is arranged at the end surface of the upper chord and the lower chord of the main truss mechanism, and the nut connection pad (62) is arranged at the side wall of the upper chord and the lower chord of the main truss mechanism, the direction in which the nut connection pad (62) is arranged is perpendicular to the side wall of the upper chord and the lower chord of the main truss mechanism, and the position in which the nut connection pad (62) is arranged is close to the end plate (61), and the segments of two adjacent main truss mechanisms are detachably connected by a screw arranged in the middle of the nut connection pad (62) and nuts at both ends of the screw.

4. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 3, characterized in that: A stiffening plate (63) is further provided on the inner side of the nut connection pad (62) and is arranged perpendicular to the nut connection pad (62), and the other end of the stiffening plate (63) is connected to the end plate (61).

5. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 1, characterized in that: The front support leg (11) comprises a sliding upper frame (111) and a fixed lower frame (112) arranged in sequence from top to bottom, the lower portion of the sliding upper frame (111) is provided with a first hydraulic cylinder (113), the lower portion of the fixed lower frame (112) is provided with a pressure receiving mechanism (114), the hydraulic rod of the first hydraulic cylinder (113) is vertically arranged downward, and the bottom of the hydraulic rod of the first hydraulic cylinder (113) is connected to the center of the top of the pressure receiving mechanism (114); the sliding upper frame (111) is composed of a vertically arranged sleeved circular pipe column and The structure is composed of a steel section member, the steel section member is arranged between the sleeved circular tube columns, the first hydraulic cylinder (113) is arranged at the center position of the bottom of the structure formed by the steel section member, the fixed lower frame (112) is composed of the inserted circular tube columns, the pressure receiving mechanism (114) is arranged between the inserted circular tube columns, and the upper part of the inserted circular tube column is inserted into the lower part of the sleeved circular tube column; the lower part of the front end of the sleeved circular tube column is also provided with an oblique brace (115), the oblique brace (115) is arranged to tilt forward and upward, and the top of the oblique brace (115) is hinged to the bottom surface of the main truss mechanism.

6. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 1, characterized in that: The middle support leg (2) and the rear support leg (3) each comprise an electric roller support, a middle rear support leg portion and a middle rear cross beam which are sequentially arranged from top to bottom. The middle rear cross beam comprises a fixed section (7) and a horizontal extension section (8). The horizontal extension section (8) is slidably arranged on both sides of the fixed section (7). The bottom of the middle rear support leg portion is connected to both sides of the top surface of the fixed section (7). A vertical jack (71) is provided in the middle of the bottom surface of the fixed section (7). An outer end support structure (81) is provided on the outer side of the bottom surface of the horizontal extension section (8).

7. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 6, characterized in that: The fixed section (7) is a hollow steel member with a box-shaped cross section, and the horizontal extension section (8) is a steel member with an H-shaped cross section. The inner end of the horizontal extension section (8) is inserted into the hollow cavity of the fixed section (7). A second hydraulic cylinder (72) is also provided in the hollow cavity of the fixed section (7), and the output shaft of the second hydraulic cylinder (72) is connected to the inner end surface of the horizontal extension section (8).

8. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 1, characterized in that: The lifting mechanism is a lifting winch.

9. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 1, characterized in that: The rotating sling (5) includes a horizontal rotation connection mechanism (51), a vertical longitudinal axis rotation connection seat (52), a sling longitudinal beam (53), a vertical transverse axis rotation connection seat (54) and a sling transverse beam (55), wherein the horizontal rotation connection mechanism (51) includes a steel cable connection portion (511) and a rotation sleeve portion (512) arranged in sequence from top to bottom, wherein the steel cable connection portion (511) is connected to the steel cable of the hoisting mechanism, and the rotation sleeve portion (512) is horizontally rotatably sleeved on the lower part of the steel cable connection portion (511), and the vertical longitudinal axis rotation connection seat (54) is connected to the vertical longitudinal axis rotation connection seat (55). The dynamic connecting seat (52) is arranged at the lower part of the rotating sleeve portion (512), the bottom of the vertical longitudinal axis rotating connecting seat (52) is rotatably connected to the middle part of the longitudinal beam of the sling, and the two sides of the vertical longitudinal axis rotating connecting seat (52) are provided with a longitudinal beam angle adjustment hydraulic adjustment mechanism, and the vertical transverse axis rotating connecting seat (54) is arranged at the bottom of the longitudinal beam (53) of the sling, the bottom of the vertical transverse axis rotating connecting seat (54) is rotatably connected to the middle part of the transverse beam (55) of the sling, and the two sides of the longitudinal beam (53) of the sling are provided with a transverse beam angle hydraulic adjustment mechanism.

10. The multifunctional bridge erection machine for installing steel main beams of a suspension bridge according to claim 9, characterized in that: The longitudinal beam angle adjustment hydraulic adjustment mechanism includes a longitudinal beam adjustment hydraulic oil cylinder, the top of the longitudinal beam adjustment hydraulic oil cylinder is rotationally connected to the side wall of the vertical longitudinal axis rotation connection seat (52), and the output shaft of the longitudinal beam hydraulic oil cylinder is tilted downward and rotationally connected to the top surface of the sling longitudinal beam (53); the crossbeam angle adjustment hydraulic adjustment mechanism includes a crossbeam adjustment hydraulic oil cylinder, the top of the crossbeam adjustment hydraulic oil cylinder is rotationally connected to the side wall of the sling longitudinal beam (53), and the output shaft of the crossbeam hydraulic oil cylinder is tilted downward and rotationally connected to the top surface of the sling crossbeam (55), and the two sides of the bottom of the sling crossbeam (55) are provided with lifting lugs (9).

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