Bridge deck crane for hoisting corrugated steel web segmental beam

Abstract

The invention provides a bridge deck crane for hoisting corrugated steel web segmental girders, which adopts a main truss, a front fulcrum structure, a walking system, two lifting systems, two lifting appliances and a plurality of telescopic supporting legs, the front fulcrum structure comprises an adjusting cross beam and cushion blocks arranged below the two ends of the adjusting cross beam, the lifting systems are arranged on the main truss, and the lifting appliances are arranged on the main truss. Each lifting system comprises a lifting mechanism, a steel strand and a wire coil, the lifting mechanism adopts a cross-core jack, one end of the steel strand is wound on the wire coil, the other end of the steel strand penetrates through the cross-core jack and then is connected with the corresponding lifting appliance, and the two lifting appliances are fixedly connected to a segmental beam to be installed at an interval; by means of the two lifting mechanisms, the to-be-installed segmental beam can be lifted, the transverse angle of the to-be-installed segmental beam can be adjusted, suspended butt-joint installation of the to-be-installed segmental beam and the installed segmental beam is achieved, and movement of the main truss is achieved through the walking system.

Description

Technical Field

[0001] The invention belongs to the field of bridge cranes, and in particular relates to a bridge crane used for hoisting corrugated steel web segment beams. Background Art

[0002] As a new type of bridge structure that has emerged in the past decade, the corrugated steel web composite bridge has the characteristics of light weight, good seismic performance, high prestressing efficiency, low cost, good economic benefits and short construction period. It can also give full play to the advantages of concrete and steel. Concrete is used in the top and bottom plates to give full play to the compressive properties of concrete. Lightweight and high-strength corrugated steel plates are used on the webs instead of concrete for shear resistance, avoiding problems such as cracking of concrete webs. Therefore, it has received widespread attention in the bridge construction industry and has been widely used in domestic projects in recent years.

[0003] In the prior art, winches are used to lift corrugated steel web segmental beams, and the lifting accuracy is relatively low, resulting in low accuracy and efficiency in the symmetrical cantilever construction of corrugated steel web segmental beams. Furthermore, the bridge cranes in the prior art either have low mobility efficiency or poor stability. In addition, compared with conventional concrete segmental box beams, the lateral bending and torsional rigidity of corrugated steel web segmental beams is weaker. The deformation of the beam segments during the prefabrication, hoisting and storage (especially double-layer stacking) processes is considerable, and the stress may be in an unfavorable state. Summary of the invention

[0004] The present invention aims to provide a bridge crane for hoisting corrugated steel web segmental beams, which solves the problem of symmetrical cantilever assembly of large-span corrugated steel web PC composite beams while ensuring the stability and safety of the bridge crane structure, and improves the movement efficiency of the bridge crane.

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

[0006] A bridge crane for hoisting corrugated steel web segmental beams is arranged on the installed segmental beams, comprising a main truss, a front fulcrum structure, a walking system, two lifting systems, two hoists and a plurality of telescopic legs, wherein the front fulcrum structure comprises an adjustment beam and pads arranged below the two ends of the adjustment beam, the adjustment beam is fixedly arranged below the front part of the main truss, the walking system is arranged below the front fulcrum structure, the plurality of telescopic legs are arranged at the bottom of the main truss, the lifting system is arranged on the main truss, and each lifting system comprises a lifting mechanism, a steel Stranded wire and wire drum, the lifting mechanism adopts a through-type jack, one end of the steel strand is wound around the wire drum, the other end of the steel strand is connected to the corresponding hanger after passing through the through-type jack, two hangers are fixedly connected to the segmental beam to be installed at intervals, and the two hangers are evenly arranged on the segmental beam to be installed along the transverse direction of the segmental beam to be installed. The segmental beam to be installed can be lifted and the transverse angle of the segmental beam to be installed can be adjusted through the two lifting mechanisms, so as to realize the suspended docking installation of the segmental beam to be installed and the installed segmental beam, and the movement of the main truss is realized by the walking system.

[0007] Preferably, in the above-mentioned bridge crane for lifting the corrugated steel web segmental beam, the lifting device includes a steel strand joint structure, a main lifting structure, two auxiliary lifting structures and an adjusting jack, the two main lifting structures are arranged at intervals along the transverse direction of the segmental beam to be installed, the two main lifting structures are parallel to the longitudinal direction of the segmental beam to be installed, the two auxiliary lifting structures are parallel to the transverse direction of the segmental beam to be installed, the middle parts of the tops of the two auxiliary lifting structures are respectively connected to the main lifting structure, and the two auxiliary lifting structures are arranged at intervals, the two auxiliary lifting structures are respectively connected to the segmental beam to be installed, and the bottom of the steel strand joint structure The part is hinged at the middle of the top of the main lifting structure, and the two hangers are evenly arranged on the segmental beam to be installed along the longitudinal direction of the segmental beam to be installed. One end of the adjusting jack is fixedly connected to one end of the top of the main lifting structure, and the other end of the adjusting jack is connected to the upper side of the steel strand joint structure. The steel strand joint structure is coaxially connected to the steel strand, and the central axis of the adjusting jack, the central axis of the main lifting frame and the central axis of the steel strand joint structure are located in the same vertical plane. The angle between the main lifting structure and the steel strand joint structure can be adjusted by adjusting the jack, thereby adjusting the longitudinal angle of the segmental beam to be installed.

[0008] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segment beams, the main lifting structure includes a main lifting frame, a screw, four adjusting nuts, a guide rail and a slider, the guide rail and the screw are arranged parallel to the main lifting frame, each of the sliders is respectively provided with a first through hole for the guide rail to pass through and a second through hole for the guide rail to pass through, two sliders are respectively sleeved on the guide rail through their own first through holes, two sliders are respectively sleeved on the screw through their own second through holes, four adjusting nuts are respectively sleeved on the screw, the internal threads of the four adjusting nuts are respectively matched with the external threads of the screw, one adjusting nut is respectively arranged on both sides of each slider, the slider can move along the guide rail and the screw, and the position of the slider on the guide rail can be adjusted by moving the adjusting nuts on both sides of the slider, and the two sliders are respectively connected to the middle of the top of the two auxiliary lifting structures.

[0009] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segment beams, the sliders are respectively hinged to the middle of the top of the corresponding auxiliary lifting structure through a cross hinge joint, and the cross hinge joint includes a first pin, a second pin and a middle connector, the upper end of the middle connector is hinged to the slider through the first pin, and the lower end of the middle connector is hinged to the middle of the top of the auxiliary lifting structure through the second pin, the first pin and the second pin are perpendicular to each other, and the auxiliary lifting structure is connected to the segment beam to be installed.

[0010] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segment beams, the walking system includes two walking mechanisms, and the two walking mechanisms are respectively arranged under the two ends of the adjustment beam, and the walking mechanism is perpendicular to the adjustment beam. The walking mechanism includes a slideway, a slide seat and a walking cylinder, the fixed end of the walking cylinder is connected to one end of the slideway, the free end of the walking cylinder is fixedly connected to the adjustment beam, and the adjustment beam is fixedly connected to the slide seat.

[0011] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segment beams, the traveling cylinder realizes the movement of the main truss by alternately moving the main truss and the slideway. When the traveling cylinder needs to drive the main truss to move, each telescopic leg is first supported on the bridge deck, the pad of the front fulcrum structure is removed, and then each telescopic leg is retracted and suspended in the air. The main truss is supported on the corresponding slideway through two sliding seats, and the traveling cylinder is extended to drive the main truss to move; when the traveling cylinder needs to drive the slideway to move, each telescopic leg is first supported on the bridge deck, and the two pads of the front fulcrum structure are respectively arranged under the two ends of the adjustment beam. The main truss is supported on the bridge deck through the telescopic legs and the front fulcrum structure, and the traveling cylinder is retracted to drive the slideway to move.

[0012] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segment beams, the walking system also includes a rear sliding track and a roller arranged at the rear middle position of the main truss, the projections of the two slides and the rollers on the horizontal plane are distributed in an isosceles triangle, and the rear sliding track is arranged on the bridge deck and is located on the moving route of the roller.

[0013] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segment beams, the travel cylinder realizes the movement of the main truss by alternately moving the main truss and the slideway. When the travel cylinder needs to drive the main truss to move, each telescopic leg is first supported on the bridge deck, the pad of the front fulcrum structure is removed, the rear sliding track is set on the bridge deck and located on the moving path of the roller, and then each telescopic leg is retracted and suspended in the air, so that the front part of the main truss is supported on the corresponding slideway through two slide seats, and the main truss is supported on the corresponding slideway. The middle and rear parts of the truss are supported on the rear sliding track by rollers. When the traveling cylinder is extended, the slide seat moves synchronously on the corresponding slideway, and the rollers move synchronously on the rear sliding track, driving the main truss to move. When the traveling cylinder needs to drive the slideway to move, each telescopic leg is extended and supported on the bridge deck first, and the two pads of the front fulcrum structure are respectively arranged under the two ends of the adjustment beam. The main truss is supported on the bridge deck by the telescopic legs and the front fulcrum structure, and the traveling cylinder is contracted to drive the slideway to move.

[0014] Preferably, the above-mentioned bridge crane for lifting corrugated steel web segmental beams also includes a rear anchor system, by which the rear of the main truss is fixed to the bridge deck, the rear anchor system includes a plurality of threaded steel rods, a plurality of nuts and a plurality of pads, the lower ends of the steel rods are successively passed through the reserved holes of the installed segmental beams and the pads and are fixed by corresponding nuts, the upper ends of the steel rods are successively passed through the lower cross beam at the bottom of the rear of the main truss and the pads and are fixed by corresponding nuts, and the steel rods are evenly distributed on the lower cross beam at the rear of the main truss.

[0015] Preferably, in the above-mentioned bridge crane for hoisting corrugated steel web segmental beams, the main truss includes two upper cross beams, two upper main beams, two front support beams, two rear support beams, two tension beams, two bottom beams and two lower cross beams, the two bottom beams are connected with the two lower cross beams to form a horizontally arranged bottom rectangular frame, the two upper cross beams are connected with the two upper main beams to form a horizontally arranged top rectangular frame, the upper cross beams and the lower cross beams are parallel to the longitudinal direction of the bridge structure, the upper main beam is parallel to the bottom beam, and the bottom rectangular frame is located on the bridge deck for aligning with the end of the segmental beam to be installed. The top rectangular frame is located obliquely above the bottom rectangular frame, the lower end of the front support beam is fixedly connected to the front end of the corresponding bottom beam, the upper end of the front support beam is fixedly connected to the front end of the corresponding upper main beam, the lower end of the rear support beam is fixedly connected to the front end of the corresponding bottom beam, the upper end of the rear support beam is fixedly connected to the rear end of the corresponding upper main beam, the lower end of the tension beam is fixedly connected to the rear end of the corresponding bottom beam, the upper end of the tension beam is fixedly connected to the rear end of the corresponding upper main beam, the horizontal projection of the main part of the upper main beam is located on the outside of the bridge deck, and a platform is provided on the top rectangular frame, and the lifting mechanism is arranged on the platform.

[0016] It can be seen from the technical solutions disclosed above that, compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In summary, the present invention provides a bridge crane for hoisting corrugated steel web segment beams, which adopts a main truss, a front fulcrum structure, a walking system, two lifting systems, two hoists and a plurality of telescopic legs, wherein the front fulcrum structure includes an adjustment beam and pads arranged below the two ends of the adjustment beam, the adjustment beam is fixedly arranged below the front part of the main truss, the walking system is arranged below the front fulcrum structure, the plurality of telescopic legs are arranged at the bottom of the main truss, the lifting system is arranged on the main truss, and each lifting system includes a lifting mechanism, a steel strand The steel strand is wound around the wire drum, and the other end of the steel strand is connected to the corresponding hanger after passing through the through-type jack. The two hangers are fixedly connected to the segmental beam to be installed at intervals. The two hangers are evenly arranged on the segmental beam to be installed along the transverse direction of the segmental beam to be installed. The segmental beam to be installed can be lifted and the transverse angle of the segmental beam to be installed can be adjusted through the two lifting mechanisms, so as to realize the suspended docking installation of the segmental beam to be installed and the installed segmental beam, and the movement of the main truss is realized by the walking system. On the one hand, the segmental beam to be installed is lifted by two lifting mechanisms. The through-type jacks used in the lifting mechanisms have high precision control. The two lifting mechanisms can adjust the lateral angle of the segmental beam to be installed by retracting and releasing steel strands of different lengths, that is, by lifting the steel strands on one side, the side of the segmental beam to be installed where the hoist corresponding to the steel strand is located will be raised compared to the other side, so that the segmental beam to be installed can be accurately lifted and the lifting angle can be adjusted, and the segmental beam to be installed can be suspended and docked with the installed segmental beam, which improves the symmetrical suspension accuracy of the segmental beam, effectively improves the construction efficiency of the symmetrical suspension of the segmental beam, and solves the problem of symmetrical suspension of large-span corrugated steel web PC composite beams on the premise of ensuring structural stability and safety. On the other hand, the bridge crane can realize the movement of the main truss through the walking system, which improves the movement efficiency of the bridge crane on the premise of ensuring the stability and safety of the structural bridge crane, thereby improving the construction efficiency and shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a bridge crane used for lifting corrugated steel web segmental beams.

[0019] Figure 2 This is the side elevation view of the bridge crane.

[0020] Figure 3 This is the front elevation view of the bridge crane.

[0021] Figure 4 This is the plan view of the bridge crane.

[0022] Figure 5 It is a structural diagram of the sling.

[0023] Figure 6 yes Figure 5 Side view of.

[0024] Figure 7 It is a structural diagram of the front fulcrum structure.

[0025] Figure 8 It is a structural diagram of the walking mechanism.

[0026] Fig. 9 It is a schematic diagram of the distribution of the walking mechanism and the rear sliding track.

[0027] Fig.10 It is a structural diagram of the main truss.

[0028] In the figure: 1-main truss, 11-upper crossbeam, 12-upper main beam, 13-front support beam, 14-rear support beam, 15-lower crossbeam, 16-bottom beam, 17-tension beam, 18-strengthening beam, 2-front fulcrum structure, 21-adjustment crossbeam, 22-pad, 3-travel system, 31-travel cylinder, 32-slide seat, 33-slideway, 34-rear sliding track, 4-telescopic outrigger, 5-lifting system, 51-lifting mechanism, 52-steel strand, 53-cable drum, 6-hanging device, 61-steel strand joint structure, 62-main hoisting structure, 621-main hoisting frame, 622-screw, 623-adjusting nut, 624-guide rail, 625-slider, 63-auxiliary hoisting structure, 64-adjusting jack, 65-cross hinge joint, 651-first pin shaft, 652-second pin shaft, 653-middle connector, 7-bridge deck, 8-segmental beam to be installed. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The technical content and features of the present invention will be described in detail below by combining the enumerated embodiments with the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. For the convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the accompanying drawings, but this cannot be a limitation of the technical solution of the present invention.

[0030] See also Figures 1 to 10The present embodiment discloses a bridge crane for hoisting corrugated steel web segmental beams, which is arranged on the segmental beams that have been installed, i.e., on the bridge deck. The bridge crane includes a main truss 1, a front fulcrum structure 2, a walking system 3, two lifting systems 5, two hoists 6, and a plurality of telescopic legs 4. The front fulcrum structure 2 includes an adjustment beam 21 and pads 22 arranged below the two ends of the adjustment beam 21. The adjustment beam 21 is fixedly arranged below the front part of the main truss 1. The walking system 3 is arranged below the front fulcrum structure 2. The plurality of telescopic legs 4 are arranged at the bottom of the main truss 1. The lifting system 5 is arranged on the main truss 1. Each lifting system 5 includes It includes a lifting mechanism 51, a steel strand 52 and a wire drum 53. The lifting mechanism 51 adopts a through-type jack. One end of the steel strand 52 is wound around the wire drum 53. The other end of the steel strand 52 passes through the through-type jack and is connected to the corresponding hanger 6. Two hangers 6 are fixedly connected to the segmental beam 8 to be installed at intervals. The two hangers 6 are evenly arranged on the segmental beam 8 to be installed along the transverse direction of the segmental beam 8 to be installed. The segmental beam 8 to be installed can be lifted and the transverse angle of the segmental beam 8 to be installed can be adjusted through the two lifting mechanisms 51, so as to realize the suspended docking installation of the segmental beam 8 to be installed and the installed segmental beam. The movement of the main truss 1 is realized by the walking system 3. On the one hand, the segment beam 8 to be installed is lifted by two lifting mechanisms. The through-type jacks used in the lifting mechanisms have high precision control. The two lifting mechanisms can adjust the lateral angle of the segment beam 8 to be installed by retracting and releasing steel strands 52 of different lengths, that is, by lifting the steel strands 52 on one side, the side of the segment beam 8 to be installed where the sling 6 corresponding to the steel strands 52 is located will be raised compared to the other side, so that the segment beam 8 to be installed can be accurately lifted and the lifting angle can be adjusted, and the segment beam 8 to be installed can be suspended and docked with the installed segment beam, thereby improving the symmetrical suspension accuracy of the segment beam, effectively improving the construction efficiency of the symmetrical suspension of the segment beam, and solving the problem of symmetrical suspension of large-span corrugated steel web PC composite beams under the premise of ensuring structural stability and safety. On the other hand, the bridge crane can realize the movement of the main truss 1 through the walking system 3, and improve the movement efficiency of the bridge crane under the premise of ensuring the stability and safety of the structural bridge crane, thereby improving the construction efficiency and shortening the construction period.

[0031] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segmental beams, the hoist 6 includes a steel strand joint structure 61, a main hoisting structure 62, two auxiliary hoisting structures 63 and an adjusting jack 64, the two main hoisting structures 62 are arranged at intervals along the lateral direction of the segmental beam 8 to be installed, the two main hoisting structures 62 are parallel to the longitudinal direction of the segmental beam 8 to be installed, the two auxiliary hoisting structures 63 are parallel to the transverse direction of the segmental beam 8 to be installed, the middle parts of the tops of the two auxiliary hoisting structures 63 are respectively connected to the main hoisting structure 62, and the two auxiliary hoisting structures 63 are arranged at intervals, the two auxiliary hoisting structures 63 are respectively connected to the segmental beam 8 to be installed, the bottom of the steel strand joint structure 61 is hinged to the middle part of the top of the main hoisting structure 62, the two hoists 6 are evenly arranged on the segmental beam 8 to be installed along the longitudinal direction of the segmental beam 8 to be installed, one end of the adjusting jack 64 is fixedly connected to one end of the top of the main hoisting structure 62, and the adjusting jack 64 is fixedly connected to one end of the top of the main hoisting structure 62. The other end of the section jack 64 is connected to the upper side of the steel strand joint structure 61, and the steel strand joint structure 61 is coaxially connected to the steel strand 52. The central axis of the adjusting jack 64, the central axis of the main suspension frame 621 and the central axis of the steel strand joint structure 61 are located in the same vertical plane. The angle between the main suspension structure 62 and the steel strand joint structure 61 can be adjusted by adjusting the jack 64, thereby adjusting the longitudinal angle of the segment beam 8 to be installed. That is to say, when the adjusting jack 64 is contracted, the end of the main suspension structure 62 on which the adjusting jack 64 is installed will be raised, and the auxiliary suspension structure 63 corresponding to the end of the main suspension structure 62 on which the adjusting jack 64 is installed will be raised, so that the corresponding end of the segment beam to be installed connected to the auxiliary suspension structure 63 corresponding to the end of the main suspension structure 62 on which the adjusting jack 64 is installed will be raised, thereby realizing the adjustment of the longitudinal angle of the segment beam 8 to be installed, and further improving the accuracy and efficiency of the suspended docking between the segment beams. Furthermore, during the segmental beam hoisting operation, the horizontal and vertical slopes of the segmental beam can be adjusted by adjusting the two adjusting jacks 64 and the two lifting mechanisms, ensuring that the hoisting device 6 is evenly stressed and the segmental beam is lifted vertically in a horizontal posture, further improving the hoisting quality and accuracy.

[0032] Preferably, in the above-mentioned bridge crane for hoisting corrugated steel web segment beams, the main hoisting structure 62 includes a main hoisting frame 621, a screw 622, four adjusting nuts 623, a guide rail 624 and a slider 625, the guide rail 624 and the screw 622 are arranged on the main hoisting frame 621 in parallel, each of the sliders 625 is provided with a first through hole for the guide rail 624 to pass through and a second through hole for the guide rail 624 to pass through, the two sliders 625 are respectively sleeved on the guide rail 624 through their first through holes, and the two sliders 625 are respectively The second through hole of the body is sleeved on the screw rod 622, and four adjusting nuts 623 are respectively sleeved on the screw rod 622. The internal threads of the four adjusting nuts 623 match the external threads of the screw rod 622 respectively. An adjusting nut 623 is respectively arranged on both sides of each slider 625. The slider 625 can move along the guide rail 624 and the screw rod 622. The position of the slider 625 on the guide rail 624 can be adjusted by moving the adjusting nuts 623 on both sides of the slider 625. The two sliders 625 are respectively connected to the middle of the top of the two auxiliary suspension structures 63. With the above structure, the position and spacing of the two auxiliary suspension structures 63 can be adjusted, which not only makes the sling 6 suitable for segmental beams of different sizes, but also makes the two auxiliary suspension structures 63 evenly arranged on the segmental beam 8 to be installed, so that the segmental beam 8 to be installed is evenly stressed during the hoisting and is not easily deformed or damaged.

[0033] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segment beams, the slider 625 is hinged to the middle of the top of the corresponding auxiliary suspension structure 63 through a cross hinge joint 65, and the cross hinge joint 65 includes a first pin 651, a second pin 652 and a middle connector 653. The upper end of the middle connector 653 is hinged to the slider 625 through the first pin 651, and the lower end of the middle connector 653 is hinged to the middle of the top of the auxiliary suspension structure 63 through the second pin 652. The first pin 651 and the second pin 652 are perpendicular to each other, and the auxiliary suspension structure 63 is connected to the segment beam 8 to be installed. The auxiliary suspension structure 63 is connected to the main suspension structure 62 through a cross hinge 65. Even if the segmental beam 8 to be installed undergoes considerable deformation during the processes of prefabrication, hoisting and storage (especially double-layer stacking), the auxiliary suspension structure 63 can be made to fit on the surface of the segmental beam 8 to be installed by adjusting the relative angle between the auxiliary suspension structure 63 and the main suspension structure 62. Finally, the auxiliary suspension structure 63 is connected and fixed to the segmental beam 8 to be installed through the screw rod 622 assembly, so that the segmental beam 8 to be installed is evenly stressed during hoisting and is not easily deformed or damaged. In other words, the auxiliary suspension structure 63 is connected to the main suspension structure 62 through a cross hinge 65, which can meet the deflection of the segmental beam in the longitudinal and transverse directions during hoisting, can adapt to the special deformation requirements of the corrugated steel web segmental beam, and effectively improve the hoisting quality and accuracy.

[0034] Preferably, in the above-mentioned bridge crane for lifting corrugated steel web segment beams, the walking system 3 includes two walking mechanisms, which are respectively arranged below the two ends of the adjustment beam 21, and the walking mechanism is perpendicular to the adjustment beam 21. The walking mechanism includes a slide 33, a slide seat 32 and a walking cylinder 31, the fixed end of the walking cylinder 31 is connected to one end of the slide 33, the free end of the walking cylinder 31 is fixedly connected to the adjustment beam 21, and the adjustment beam 21 is fixedly connected to the slide seat 32. The travel cylinder 31 realizes the movement of the main truss 1 by alternately moving the main truss 1 and the slideway 33. When the travel cylinder 31 needs to drive the main truss 1 to move, each telescopic leg 4 is first supported on the bridge deck, the pad 22 of the front fulcrum structure 2 is removed, and then each telescopic leg 4 is retracted and suspended in the air. The main truss 1 is supported on the corresponding slideway 33 through two slide seats 32, and the travel cylinder 31 is extended to drive the main truss 1 to move; when the travel cylinder 31 needs to drive the slideway 33 to move, each telescopic leg 4 is first supported on the bridge deck, and the two pads 22 of the front fulcrum structure 2 are respectively set under the two ends of the adjustment beam 21. The main truss 1 is supported on the bridge deck through the telescopic legs 4 and the front fulcrum structure 2, and the travel cylinder 31 is retracted to drive the slideway 33 to move. In this way, the free movement of the main truss 1 can be realized, and the movement efficiency of the bridge deck belt crane can be improved under the premise of ensuring the stability and safety of the structural bridge deck crane.

[0035] As a further preference, in order to improve the stability and safety of the movement of the main truss 1, the walking system 3 also includes a rear sliding track 34 and a roller (not shown) arranged at the rear middle position of the main truss 1. The projections of the two slides 32 and the roller on the horizontal plane are distributed in an isosceles triangle. The rear sliding track 34 is arranged on the bridge deck and is located on the moving path of the roller. The walking cylinder 31 realizes the movement of the main truss 1 by alternately moving the main truss 1 and the slide 33. When the walking cylinder 31 needs to drive the main truss 1 to move, each telescopic leg 4 is first supported on the bridge deck, the pad 22 of the front fulcrum structure 2 is removed, and the rear sliding track 34 is arranged on the bridge deck and is located on the moving path of the roller. Then, each telescopic leg 4 is retracted and suspended in the air, so that the front of the main truss 1 is supported on the corresponding slide 33 through the two slides 32, and the middle and rear part of the main truss 1 is supported on the rear sliding track 33 through the rollers. On the track 34, the travel cylinder 31 extends, the slide 32 moves synchronously on the corresponding slide 33, and the roller moves synchronously on the rear sliding track 34, driving the main truss 1 to move; when the travel cylinder 31 needs to drive the slide 33 to move, each telescopic leg 4 is first extended and supported on the bridge deck, and the two pads 22 of the front fulcrum structure 2 are respectively set under the two ends of the adjustment beam 21. The main truss 1 is supported on the bridge deck by the telescopic legs 4 and the front fulcrum structure 2, and the travel cylinder 31 contracts to drive the slide 33 to move. Since the projections of the two slides 32 and rollers installed at the bottom of the main truss 1 on the horizontal plane are distributed in an isosceles triangle, when the travel cylinder 31 extends, the slide 32 moves synchronously on the corresponding slide 33, and the roller moves synchronously on the rear sliding track 34, making the movement of the main truss 1 more stable and safe.

[0036] Preferably, the above-mentioned bridge crane for hoisting the corrugated steel web segmental beam also includes a rear anchor system (not shown), by which the rear of the main truss 1 is fixed to the bridge deck, and the rear anchor system includes a plurality of threaded steel rods, a plurality of nuts and a plurality of pads, the lower ends of the steel rods are successively passed through the reserved holes of the installed segmental beams and the pads and then fixed by corresponding nuts, the upper ends of the steel rods are successively passed through the lower cross beam 15 at the bottom of the rear of the main truss 1 and the pads and then fixed by corresponding nuts, and the steel rods are evenly distributed on the lower cross beam 15 at the rear of the main truss 1. When the bridge crane hoists the segmental beam, the rear of the main truss 1 is fixed to the bridge deck by the rear anchor system, which can improve the stability and safety of the main truss 1 when the lifting mechanism hoists the segmental beam.

[0037] Preferably, in the above-mentioned bridge crane for hoisting corrugated steel web segmental beams, the main truss 1 includes two upper cross beams 11, two upper main beams 12, two front support beams 13, two rear support beams 14, two tension beams 17, two bottom beams 16 and two lower cross beams 15, the two bottom beams 16 are connected with the two lower cross beams 15 to form a horizontally arranged bottom rectangular frame, the two upper cross beams 11 are connected with the two upper main beams 12 to form a horizontally arranged top rectangular frame, the upper cross beams 11 and the lower cross beams 15 are parallel to the longitudinal direction of the bridge structure, the upper main beam 12 is parallel to the bottom beam 16, and the bottom rectangular frame is located on the bridge deck for aligning with the end of the segmental beam to be installed The top rectangular frame is located obliquely above the bottom rectangular frame, the lower end of the front support beam 13 is fixedly connected to the front end of the corresponding bottom beam 16, the upper end of the front support beam 13 is fixedly connected to the front end of the corresponding upper main beam 12, the lower end of the rear support beam 14 is fixedly connected to the front end of the corresponding bottom beam 16, the upper end of the rear support beam 14 is fixedly connected to the rear end of the corresponding upper main beam 12, the lower end of the tension beam 17 is fixedly connected to the rear end of the corresponding bottom beam 16, the upper end of the tension beam 17 is fixedly connected to the rear end of the corresponding upper main beam 12, the horizontal projection of the main part of the upper main beam 12 is located outside the bridge deck, and a platform is provided on the top rectangular frame, and the lifting mechanism is arranged on the platform. The main truss 1 is made of steel material. It is composed of the main force-bearing rods such as the upper main beam 12, the upper cross beam 11, the front support beam 13, the rear support beam 14, the tension beam 17, the bottom beam 16 and the lower cross beam 15, and other auxiliary horizontal connecting rods. The upper main beam 12, the upper cross beam 11, the front support beam 13, the rear support beam 14, the tension beam 17, the bottom beam 16 and the lower cross beam 15 are respectively connected to form a parallelogram structure with two stable triangular structures through flange plates and pins, which effectively improves the stability of the main truss 1. In order to further improve the stability of the main truss 1, a reinforcing beam 18 parallel to the upper main beam 12 is provided on the inner side of the upper main beam 12, and a reinforcing beam 18 parallel to the front support beam 13 is provided on the inner side of the front support beam 13. In addition, the internal space of the truss is used to place the hydraulic power pump station and the electric control system, and provide a working platform for construction operations. For easy transportation, the truss adopts a detachable design of flange connection and pin connection.

[0038] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A bridge crane for hoisting a corrugated steel web segmental beam, which is arranged on an installed segmental beam, and is characterized in that: The invention comprises a main truss, a front fulcrum structure, a walking system, two lifting systems, two slings and a plurality of telescopic legs. The front fulcrum structure comprises an adjustment beam and pads arranged below the two ends of the adjustment beam. The adjustment beam is fixedly arranged below the front part of the main truss. The walking system is arranged below the front fulcrum structure. The plurality of telescopic legs are arranged at the bottom of the main truss. The lifting system is arranged on the main truss. Each lifting system comprises a lifting mechanism, a steel strand and a wire drum. The lifting mechanism adopts a through A core-type jack, one end of the steel strand is wound around the wire drum, the other end of the steel strand is connected to the corresponding hanger after passing through the core-type jack, two hangers are fixedly connected to the segmental beam to be installed at intervals, and the two hangers are evenly arranged on the segmental beam to be installed along the transverse direction of the segmental beam to be installed. The segmental beam to be installed can be lifted and the transverse angle of the segmental beam to be installed can be adjusted through two lifting mechanisms, so as to realize the suspended docking installation of the segmental beam to be installed and the installed segmental beam, and the movement of the main truss is realized through the walking system.

2. The bridge crane for hoisting corrugated steel web segment beams according to claim 1, characterized in that: The hanger includes a steel strand joint structure, a main hanging structure, two auxiliary hanging structures and an adjusting jack, the two main hanging structures are arranged at intervals along the transverse direction of the segment beam to be installed, the two main hanging structures are parallel to the longitudinal direction of the segment beam to be installed, the two auxiliary hanging structures are parallel to the transverse direction of the segment beam to be installed, the middle of the top of the two auxiliary hanging structures are respectively connected to the main hanging structure, and the two auxiliary hanging structures are arranged at intervals, the two auxiliary hanging structures are respectively connected to the segment beam to be installed, and the bottom of the steel strand joint structure is hinged to the middle of the top of the main hanging structure The two hoists are evenly arranged on the segmental beam to be installed along the longitudinal direction of the segmental beam to be installed, one end of the adjusting jack is fixedly connected to the top end of the main lifting structure, the other end of the adjusting jack is connected to the upper side of the steel strand joint structure, the steel strand joint structure is coaxially connected to the steel strand, the central axis of the adjusting jack, the central axis of the main lifting frame and the central axis of the steel strand joint structure are located in the same vertical plane, and the angle between the main lifting structure and the steel strand joint structure can be adjusted by adjusting the jack, thereby adjusting the longitudinal angle of the segmental beam to be installed.

3. The bridge crane for hoisting corrugated steel web segment beams according to claim 2, characterized in that: The main hanging structure includes a main hanging frame, a screw, four adjusting nuts, a guide rail and a slider. The guide rail and the screw are arranged on the main hanging frame in parallel. Each of the sliders is provided with a first through hole for the guide rail to pass through and a second through hole for the guide rail to pass through. Two sliders are respectively sleeved on the guide rail through their own first through holes, and two sliders are respectively sleeved on the screw through their own second through holes. Four adjusting nuts are respectively sleeved on the screw, and the internal threads of the four adjusting nuts are respectively matched with the external threads of the screw. An adjusting nut is respectively arranged on both sides of each slider, and the slider can move along the guide rail and the screw. The position of the slider on the guide rail can be adjusted by moving the adjusting nuts on both sides of the slider. The two sliders are respectively connected to the middle of the top of the two auxiliary hanging structures.

4. The bridge crane for hoisting corrugated steel web segment beams according to claim 3, characterized in that: The sliders are respectively hinged to the middle of the top of the corresponding auxiliary suspension structure through a cross hinge joint, and the cross hinge joint includes a first pin, a second pin and a middle connector. The upper end of the middle connector is hinged to the slider through the first pin, and the lower end of the middle connector is hinged to the middle of the top of the auxiliary suspension structure through the second pin. The first pin and the second pin are perpendicular to each other, and the auxiliary suspension structure is connected to the segment beam to be installed.

5. The bridge crane for hoisting corrugated steel web segment beams according to claim 1, characterized in that: The walking system includes two walking mechanisms, which are respectively arranged below the two ends of the adjusting beam. The walking mechanisms are perpendicular to the adjusting beam. The walking mechanisms include a slideway, a slide seat and a walking cylinder. The fixed end of the walking cylinder is connected to one end of the slideway, the free end of the walking cylinder is fixedly connected to the adjusting beam, and the adjusting beam is fixedly connected to the slide seat.

6. The bridge crane for hoisting corrugated steel web segment beams according to claim 5, characterized in that: The traveling cylinder realizes the movement of the main truss by alternately moving the main truss and the slide. When the traveling cylinder needs to drive the main truss to move, each telescopic leg is first supported on the bridge deck, the pad of the front fulcrum structure is removed, and then each telescopic leg is retracted and suspended in the air. The main truss is supported on the corresponding slide through two sliding seats, and the traveling cylinder is extended to drive the main truss to move; when the traveling cylinder needs to drive the slide to move, each telescopic leg is first supported on the bridge deck, and the two pads of the front fulcrum structure are respectively arranged under the two ends of the adjustment beam. The main truss is supported on the bridge deck through the telescopic legs and the front fulcrum structure, and the traveling cylinder is retracted to drive the slide to move.

7. The bridge crane for hoisting corrugated steel web segment beams according to claim 5, characterized in that: The walking system also includes a rear sliding track and a roller arranged at the rear middle position of the main truss. The projections of the two slides and the roller on the horizontal plane are distributed in an isosceles triangle. The rear sliding track is arranged on the bridge deck and is located on the moving route of the roller.

8. The bridge crane for hoisting corrugated steel web segment beams according to claim 7, characterized in that: The traveling oil cylinder realizes the movement of the main truss by alternately moving the main truss and the slideway. When the traveling oil cylinder needs to drive the main truss to move, each telescopic leg is first supported on the bridge deck, the pad of the front fulcrum structure is removed, the rear sliding track is set on the bridge deck and located on the moving route of the roller, and then each telescopic leg is retracted and suspended in the air, so that the front part of the main truss is supported on the corresponding slideway by the two sliding seats, and the middle and rear parts of the main truss are supported on the rear sliding track by the rollers. The traveling oil cylinder is extended, the sliding seat moves synchronously on the corresponding slideway, and the roller moves synchronously on the rear sliding track, driving the main truss to move; when the traveling oil cylinder needs to drive the slideway to move, each telescopic leg is first extended and supported on the bridge deck, the two pads of the front fulcrum structure are respectively set under the two ends of the adjustment beam, the main truss is supported on the bridge deck by the telescopic legs and the front fulcrum structure, and the traveling oil cylinder is retracted to drive the slideway to move.

9. The bridge crane for hoisting corrugated steel web segment beams according to claim 1, characterized in that: It also includes a rear anchor system, by which the rear of the main truss is fixed to the bridge deck. The rear anchor system includes a plurality of threaded steel rods, a plurality of nuts and a plurality of pads. The lower ends of the steel rods are successively passed through the reserved holes of the installed segment beams and the pads and are fixed by corresponding nuts. The upper ends of the steel rods are successively passed through the lower cross beam at the bottom of the rear of the main truss and the pads and are fixed by corresponding nuts. The steel rods are evenly distributed on the lower cross beam at the rear of the main truss.

10. The bridge crane for hoisting corrugated steel web segment beams according to claim 1, characterized in that: The main truss includes two upper cross beams, two upper main beams, two front support beams, two rear support beams, two tension beams, two bottom beams and two lower cross beams. The two bottom beams are connected with the two lower cross beams to form a horizontally arranged bottom rectangular frame. The two upper cross beams are connected with the two upper main beams to form a horizontally arranged top rectangular frame. The upper cross beams and the lower cross beams are parallel to the longitudinal direction of the bridge structure. The upper main beam is parallel to the bottom beam. The bottom rectangular frame is located on the bridge deck for aligning with the end of the to-be-installed segment beam. The top rectangular frame is located at the bottom rectangular frame. shaped frame, the lower end of the front support beam is fixedly connected to the front end of the corresponding bottom beam, the upper end of the front support beam is fixedly connected to the front end of the corresponding upper main beam, the lower end of the rear support beam is fixedly connected to the front end of the corresponding bottom beam, the upper end of the rear support beam is fixedly connected to the rear end of the corresponding upper main beam, the lower end of the tension beam is fixedly connected to the rear end of the corresponding bottom beam, the upper end of the tension beam is fixedly connected to the rear end of the corresponding upper main beam, the horizontal projection of the main part of the upper main beam is located on the outside of the bridge deck, and a platform is provided on the top rectangular frame, and the lifting mechanism is arranged on the platform.

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