CN116988400A - Walking system and walking method of cantilever bridge fabrication machine - Google Patents

Abstract

The invention provides a traveling system of a cantilever bridge fabrication machine and a traveling method thereof, wherein the traveling system comprises a longitudinal rail, a rail anchoring assembly, a front roller assembly, a rear roller assembly, a jacking portal frame and a traveling traction device, wherein the traveling traction device comprises a front counter-force seat, a rear counter-force seat, an oil cylinder support, a mechanical self-locking through type oil cylinder, a clamping oil cylinder and a pull rod, and the front counter-force seat and the rear counter-force seat are both fixed at the bottom of a main beam; the oil cylinder support is fixed at the front end of the longitudinal rail; the front roller seat is fixedly connected with the oil cylinder support, a base plate is fixed on the oil cylinder support below the guide rail, a cushion block is longitudinally fixed on the base plate, and the side surfaces of the guide rail are provided with graduated scales; an infrared range finder is installed towards a front counter-force seat on a cylinder body of the mechanical self-locking through type oil cylinder, an infrared reflecting plate is correspondingly installed on the front counter-force seat, and the infrared range finder and the infrared reflecting plate are located on the same horizontal axis. The rapid running of the main beam and the longitudinal rail is realized, and the running is synchronous, stable and safe.

Description

Walking system and walking method of cantilever bridge fabrication machine

Technical Field

The invention relates to the technical field of cantilever bridge fabrication machines, in particular to a travelling system and a travelling method of a cantilever bridge fabrication machine.

Background

Along with the rapid development of high-speed railway construction, the proportion of the large-span bridge in the high-speed railway construction is larger and larger, and the cantilever bridge fabrication machine plays a vital role in the construction of the large-span bridge. The travelling system of the cantilever bridge fabrication machine is an important component in the travelling process of the cradle of the bridge fabrication machine.

The running of the cantilever bridge fabrication machine at present is usually the running of a main beam, and the main beam drives a hanging basket to synchronously run. The existing main beams all need to be pushed by a worker operating an oil cylinder, three main beams of the cantilever bridge fabrication machine are usually provided, each main beam is correspondingly provided with a hydraulic traveling device, and the corresponding hydraulic traveling systems need to be operated by corresponding workers. The process is frequently in the running process, the running of the oil cylinders at two sides is not synchronous, the forward movement quantity and stability are not effectively ensured, the overturning risk exists, the safety risk is high, and the linear control is not facilitated.

After the pouring construction of the longitudinal rail in the cantilever bridge fabrication machine is completed, the longitudinal rail is required to be moved to the box girder just poured, and then the main girder is required to be moved. At present, the longitudinal rail below the main beam is moved by a front pull type, a cushion beam is arranged at the front end of the longitudinal rail, a finish rolling screw thread steel is penetrated to a front support through the cushion beam, a penetrating type jack is arranged at the rear end of the front support, the penetrating type jack is connected with the finish rolling screw thread steel by a screw cap, meanwhile, the jack is connected with an oil pump, and the longitudinal rail is pushed to move forwards by a traveling device. The cantilever bridge fabrication machine has large size, heavy weight and high precision, and has lower running efficiency in the actual operation process.

Therefore, it is necessary to provide a running system capable of enabling the girder and the longitudinal rail to run rapidly, ensuring that the girder of the bridge fabrication machine runs stably and has good running synchronism, and simultaneously ensuring that the longitudinal rail runs more rapidly, stably and safely.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a travelling system and a travelling method of a cantilever bridge fabrication machine, which can realize the rapid travelling of a main beam and a longitudinal rail, and are synchronous, stable and safe in travelling.

The technical scheme adopted for achieving the purposes of the invention is as follows:

the number of groups of the traveling systems is matched with the number of main beams of the cantilever bridge fabrication machine, the traveling systems are arranged below the main beams, each group of the traveling systems comprises a longitudinal rail, a rail anchoring assembly, a front roller assembly, a rear roller assembly, a jacking portal and a traveling traction device, the rear end of the longitudinal rail is in sliding connection with the main beams through the rear roller assembly, the front roller assembly comprises a front roller seat, a front roller frame and a front roller, the front roller seat is fixedly connected to the upper surface of the front end of the longitudinal rail, the front roller frame is fixed on the front roller seat, and the front roller is arranged on the front roller frame; the bottom of each girder is provided with a guide rail along the longitudinal direction, and the front idler wheels are reversely buckled on the guide rails, so that the front ends of the longitudinal rails are in sliding connection with the girders; the longitudinal rails are detachably fixed on the girder surfaces of the box girders through the rail anchor assemblies, each girder is connected with two jacking door frames in a distributed mode, and jacking oil cylinders are arranged in the jacking door frames;

the walking traction device comprises a front counter-force seat, a rear counter-force seat, an oil cylinder support, a mechanical self-locking and punching type oil cylinder, a clamping oil cylinder and a pull rod, wherein the pull rod is horizontally arranged and sequentially passes through the rear counter-force seat, the oil cylinder support, the mechanical self-locking and punching type oil cylinder, the clamping oil cylinder and the front counter-force seat, the front counter-force seat and the rear counter-force seat are both fixed on a longitudinal central axis of the bottom of the main beam, the front counter-force seat and the rear counter-force seat are respectively positioned at the front end and the middle part of the main beam, and two ends of the pull rod are fixedly connected with the front counter-force seat and the rear counter-force seat; the mechanical self-locking through type oil cylinder is fixedly connected with the oil cylinder support, the clamping oil cylinder is fixedly connected with the mechanical self-locking through type oil cylinder, the clamping oil cylinder clamps the pull rod, and the mechanical self-locking through type oil cylinder stretches out and draws back, so that the main beam and the longitudinal rail are driven to move relatively;

the front roller seat is fixedly connected with the oil cylinder support, a base plate is fixed on the oil cylinder support below the guide rail and is contacted with the guide rail, cushion blocks are longitudinally fixed on two sides of the guide rail on the base plate and are also contacted with the guide rail, when the main beam moves on the track, the guide rail moves relative to the base plate and the cushion blocks, and graduated scales are arranged on the side surfaces of the guide rail; the infrared range finder is installed towards the front counter-force seat on the cylinder body of the mechanical self-locking through type oil cylinder, the infrared reflecting plate is correspondingly installed on the front counter-force seat, the infrared range finder and the infrared reflecting plate are positioned on the same horizontal axis, and the relative distance between the mechanical self-locking through type oil cylinder and the front counter-force seat is measured.

The lifting oil cylinder, the mechanical self-locking through type oil cylinder and the clamping oil cylinder are all connected with an intelligent hydraulic pump station, the intelligent hydraulic pump station and the infrared range finder are all connected with a PLC hydraulic control system, the PLC hydraulic control system receives data of the infrared range finder, and the stroke of the mechanical self-locking through type oil cylinder is controlled through the intelligent hydraulic pump station, so that the whole cantilever bridge fabrication machine walks synchronously.

The jacking portal comprises a jacking cross beam and jacking supporting legs, wherein the jacking cross beam penetrates through the main beam and is fixedly connected with the main beam, two jacking supporting legs are fixedly connected to two ends of the jacking cross beam, a jacking oil cylinder is arranged at the bottom of the jacking supporting legs and stretches out and draws back, so that the jacking portal is supported or separated from a box Liang Liangmian.

The rear roller assembly comprises a rear roller seat, a rear roller frame and rear rollers, wherein the rear roller seat is fixedly connected to the upper surface of the rear end of the longitudinal rail, two rear roller frames are fixed on the rear roller seat, and the two rear rollers are arranged on the two rear roller frames; two sides of each girder are provided with sliding rails, and two rear idler wheels are respectively reversely buckled on the sliding rails on two sides of the girders.

An oil cylinder connecting plate is arranged between the oil cylinder support and the mechanical self-locking through type oil cylinder, the oil cylinder support, the mechanical self-locking through type oil cylinder and the oil cylinder connecting plate are fixedly connected through high-strength bolts, and a round hole for a pull rod to pass through is correspondingly formed in the oil cylinder connecting plate.

The front counterforce seat or the rear counterforce seat is fixedly connected with the main beam and the counterforce seat connecting plate through high-strength bolts; the horizontal axes on the front counter-force seat and the rear counter-force seat are respectively provided with a pull rod hole, the pull rods penetrate through the pull rod holes, and the front counter-force seat or the rear counter-force seat is fixed with the pull rods through nuts and washers.

The longitudinal track comprises two section steel, the track anchor assembly comprises a bolster, a rail pressing beam and finish rolling deformed steel bars, the bolster is arranged on a box girder surface below the longitudinal track along transverse distribution, the rail pressing beams are arranged at the front end and the rear end of the longitudinal track along transverse distribution, and two ends of each rail pressing beam are fixedly connected with a box Liang Liangmian through the finish rolling deformed steel bars.

Three pillows are arranged at the front end of the longitudinal rail, and one bolster is arranged at the rear end of the longitudinal rail; the front end of the longitudinal rail is provided with a rail pressing beam, the rail pressing beam is positioned at the rear of the front roller assembly, the rear end of the longitudinal rail is provided with two rail pressing beams, and the two rail pressing beams are respectively positioned at the front and rear of the rear roller.

The guide rails are made of square steel, two guide rails are arranged on two sides of the bottom of each main beam, two front roller frames are connected to the front roller seats, two front rollers are mounted on the two front roller frames, and the two front rollers are respectively reversely buckled on the two guide rails, so that the front rollers move along the guide rails.

The invention also provides a running method of the running system of the cantilever bridge fabrication machine, which comprises the following steps: (1) Installing a longitudinal rail and a rail anchoring assembly on the girder surface of the box girder according to the installation procedure of the cantilever bridge fabrication machine, fixing the longitudinal rail on the girder surface of the box girder through finish rolling deformed steel bars in the rail anchoring assembly, and then installing a front roller assembly, a rear roller assembly, a main girder, a walking traction device and a jacking portal; at this time, the main girder and the longitudinal track are both positioned at the front end of the constructed box girder;

(2) And (3) walking of a main beam: when the jacking portal contracts, the main beam is supported on the longitudinal rail, the clamping cylinder clamps the pull rod, the mechanical self-locking through type cylinder stretches to drive the main beam to travel a certain distance along the longitudinal rail, the clamping cylinder is loosened and contracted, the mechanical self-locking through type cylinder clamps the pull rod again, the mechanical self-locking through type cylinder stretches to sequentially repeat, so that the main beam travels to a construction surface along the longitudinal rail, and the traveling of the main beam is completed; preparing a casting box girder, and carrying out running of a longitudinal rail after the casting of the box girder is completed;

(3) Running of the longitudinal rail: removing finish rolling screw steel in a rail anchoring assembly, jacking a portal frame to lift a girder, enabling a longitudinal rail to be separated from the rail anchoring assembly below the portal frame, enabling a mechanical self-locking through type oil cylinder to extend, enabling a clamping oil cylinder to clamp a pull rod, contracting the mechanical self-locking through type oil cylinder to drive the longitudinal rail to move along the girder for a certain distance, loosening the clamping oil cylinder and extending the mechanical self-locking through type oil cylinder, enabling the clamping oil cylinder to clamp the pull rod again, enabling the mechanical self-locking through type oil cylinder to contract, and repeating in sequence, enabling the longitudinal rail to move onto a box girder which is just poured, and completing the moving of the longitudinal rail.

Compared with the prior art, the technical scheme provided by the invention has the following advantages:

1. the travelling system of the cantilever bridge fabrication machine provided by the invention can realize the rapid travelling of the main beam and the longitudinal rail, and the travelling is synchronous, stable and safe.

2. The longitudinal rail is fixed with the box Liang Liangmian through the bolster, the rail pressing beam and the finish rolling screw steel, wherein the bolster is distributed below the front roller assembly and the rear roller assembly to support the components above the longitudinal rail, and the rail pressing beam and the finish rolling screw steel are distributed at the front end and the rear end of the longitudinal rail. Further ensures the stable reliability of the connection of the longitudinal rails, realizes the integral stress of the longitudinal rails, and greatly improves the running safety performance of the bridge fabrication machine.

3. In the invention, the rear roller assemblies are reversely hung on two sides of the main beam, the front roller assemblies are reversely hung on two sides of the bottom of the main beam, the connection between the longitudinal rail and the main beam is stable and reliable, the running stability is ensured, the running traction device is arranged on the central axis of the bottom of the main beam, and the front roller assemblies and the rear roller assemblies can not influence the operation of the running traction device.

4. According to the walking traction device, the pull rod is fixedly connected to the lower part of the main beam through the front counter-force seat and the rear counter-force seat, the mechanical self-locking through type oil cylinder and the clamping oil cylinder are fixed on the longitudinal rail through the oil cylinder support, the pull rod is clamped through the clamping oil cylinder, the mechanical self-locking through type oil cylinder stretches to realize the relative movement of the main beam and the longitudinal rail, so that the main beam and the longitudinal rail are kept horizontal, and the traction is stable; and the base plate and the cushion block are arranged on the oil cylinder support to limit the guide rail, and when the main beam moves relative to the longitudinal rail, the guide rail moves relative to the base plate and the cushion block, so that the guide rail is prevented from being extruded and deformed, and the base plate and the cushion block have the dual functions of traction limiting and supporting.

5. According to the invention, the guide rail is made of square steel, the graduated scale is arranged on the guide rail, reading is carried out through the limiting cushion block, meanwhile, the infrared range finder and the infrared reflecting plate are also arranged on the walking traction device, the relative displacement between the longitudinal rail and the main beam is monitored in real time, and the infrared range finder and the graduated scale reading are dynamically verified, so that the synchronism and the stability of the bridge fabrication machine are greatly improved.

6. According to the invention, the lifting door frame is arranged on the main beam, when the main beam walks, the lifting door frame contracts to enable the main beam to be supported on the longitudinal track, and at the moment, the walking traction device drives the main beam to move, so that the main beam moves to the construction surface; when the longitudinal rail runs, the jacking portal is jacked up, so that the main beam is supported on the jacking oil cylinder and the box beam bridge deck, the longitudinal rail is completely separated from the bolster, and the running traction device drives the longitudinal rail to move and run.

7. According to the invention, the jacking oil cylinder, the mechanical self-locking through type oil cylinder and the clamping oil cylinder are all connected with an intelligent hydraulic pump station, the intelligent hydraulic pump station and the infrared range finder are both connected with a PLC hydraulic control system, the PLC hydraulic control system receives data of the infrared range finder, the stroke of the mechanical self-locking through type oil cylinder is controlled by the intelligent hydraulic pump station, three main beams are controlled to synchronously walk, and the hydraulic control oil cylinder stretches out and draws back by one key, so that the walking efficiency is high.

Drawings

FIG. 1 is a schematic diagram of the traveling system of the cantilever bridge fabrication machine of the present invention before traveling of the main beam;

FIG. 2 is a schematic diagram of the traveling system of the cantilever bridge fabrication machine in the traveling of the main beam;

FIG. 3 is a schematic diagram of the traveling system of the cantilever bridge fabrication machine after traveling of the main beam;

FIG. 4 is a schematic diagram of the traveling system of the cantilever bridge fabrication machine of the present invention prior to traveling along the longitudinal track;

FIG. 5 is a schematic view of the running system of the cantilever bridge fabrication machine in the running of the longitudinal track;

FIG. 6 is a schematic diagram of the traveling system of the cantilever bridge fabrication machine of the present invention after traveling along a longitudinal track;

FIG. 7 is a schematic cross-sectional view of the travel system of the suspension bridge fabrication machine of FIG. 1 at the rear roller assembly;

FIG. 8 is an enlarged view of a portion of FIG. 7;

FIG. 9 is a schematic cross-sectional view of the travel system of the suspension bridge fabrication machine of FIG. 1 at the front roller assembly;

FIG. 10 is a schematic view of the connection of a track anchor assembly to a longitudinal track in accordance with the present invention;

FIG. 11 is a schematic cross-sectional view of the travel system of the cantilever bridge fabrication machine of FIG. 1 at a lifting mast;

FIG. 12 is a schematic view of a walking tractor according to the present invention;

FIG. 13 is a schematic cross-sectional view of the travel system of the suspension bridge fabrication machine of FIG. 1 at a rear reaction mount;

FIG. 14 is a schematic view of the connection of the cylinder mount and the front roller mount of the present invention;

FIG. 15 is a schematic cross-sectional view of the travel system of the suspension bridge fabrication machine of FIG. 1 at the ram connection plate;

in the figure: 1-girder, 11-slide rail, 12-guide rail, 2-box girder, 3-longitudinal rail, 41-back roller seat, 42-back roller frame, 43-back roller, 51-front roller seat, 52-front roller frame, 53-front roller, 61-bolster, 62-rail-pressing girder, 63-finish rolling screw steel, 7-jacking portal, 71-jacking crossbeam, 72-jacking leg, 73-jacking cylinder, 81-front counter-force seat, 811-front counter-force seat connecting plate, 82-back counter-force seat, 821-back counter-force seat connecting plate, 831-cylinder support, 832-mechanical self-locking through cylinder, 833-cylinder connecting plate, 84-clamping cylinder, 85-pull rod, 86-backing plate, 87-cushion block, 88-infrared range finder and 89-infrared reflector.

Detailed Description

The invention will now be described in more detail with reference to the drawings and examples.

The structure of the travelling system of the cantilever bridge fabrication machine is shown in figures 1-6. The cantilever bridge fabrication machine comprises a main beam 1, a hanging basket, a running system and a rear anchor system, wherein the number of the running system is matched with the number of the main beams of the cantilever bridge fabrication machine, and the running system is arranged below the main beams. The girders are generally arranged at the web positions corresponding to the pouring box girders 2, and typically, three girders are correspondingly arranged on the double-hole box girders, and three groups of running systems are correspondingly arranged, as shown in fig. 7.

Each group of running system comprises a longitudinal track 3, a track anchoring assembly, a front roller assembly, a rear roller assembly, a jacking portal frame and a running traction device, and as the running system is provided with three groups, the track anchoring assembly, the front roller assembly, the rear roller assembly, the jacking portal frame, the running traction device and the like are correspondingly provided with three groups, and only one group is introduced in the following description.

The longitudinal rail is slidably mounted at the front end and the rear end of the main beams through a front roller assembly and a rear roller assembly, two sides of each main beam are respectively provided with a sliding rail 11, the rear roller assembly comprises a rear roller seat 41, a rear roller frame 42 and a rear roller 43, the rear roller seat is fixedly connected to the upper surface of the rear end of the longitudinal rail through high-strength bolts, two rear roller frames are fixedly arranged on the rear roller seat through the high-strength bolts, four rear rollers are mounted on the two rear roller frames through pin shafts, the two rear rollers are respectively reversely buckled and mounted on the sliding rails at two sides of the main beams, and as shown in fig. 7 and 8, the reversely buckled rear rollers play a role of fast running and anti-overturning in the running process. In this embodiment, the bottom of each main beam is provided with a guide rail 12 along the longitudinal direction, and the front roller assembly includes a front roller seat 51, a front roller frame 52 and a front roller 53, the front roller seat is fixedly connected to the upper surface of the front end of the longitudinal rail through a high-strength bolt, the front roller frame is fixed on the front roller seat through a high-strength bolt, the front roller is mounted on the front roller frame through a pin shaft, and the front roller is reversely buckled on the guide rail, so that the front end of the longitudinal rail is in sliding connection with the main beam, as shown in fig. 9. The guide rail is welded with the main beam. Specifically, the guide rail is made of square steel, two guide rails are arranged on two sides of the bottom of each girder in the embodiment, therefore, two front roller frames are connected to the front roller seat and are provided with two front rollers, specifically, the front roller seat is connected with the longitudinal rail through high-strength bolts, the front roller seat is fixedly connected with the two front roller frames, the two front roller frames are connected with the two front rollers through pin shafts, the two front rollers are respectively reversely buckled on the two square steel, and the front rollers move along the guide rail, as shown in fig. 9.

The longitudinal rail is detachably fixed on the girder surface of the box girder through the rail anchoring assembly, see fig. 1 and 10, specifically, the longitudinal rail is composed of two profile steels with HM588 x 300 x 12 x 20 connected side by side, and the installation center distance of the two profile steels is 1.1m, as shown in fig. 7-9. The track anchor assembly includes bolster 61, pressure rail roof beam 62 and finish rolling screw steel 63, as shown in fig. 10, the bolster along horizontal distribution is arranged on the roof beam face of longitudinal rail below, and the bolster is formed by lower pterygoid lamina, web, baffle, upper pterygoid lamina group welding in this embodiment, and every longitudinal rail's below is provided with four bolsters, and wherein three bolsters are located longitudinal rail's front end, and the bolster of front end is located just pouring the equidistant arrangement of 7.5cm department of roof beam section line, supports the hydro-cylinder support of preceding gyro wheel assembly and walking draw gear of longitudinal rail top, and another bolster is located longitudinal rail's rear end, namely under the back gyro wheel assembly, supports the back gyro wheel of longitudinal rail top. The rail pressing beams are transversely erected at the front end and the rear end on the longitudinal rail, each rail pressing beam is formed by welding two channel steel and a batten plate in a combined mode, one rail pressing beam is arranged at the front end of the longitudinal rail, the rail pressing beam is located at the rear of the front roller assembly, two rail pressing beams are arranged at the rear end of the longitudinal rail, and the two rail pressing beams are located at the front and the rear of the rear roller respectively. The two ends of each rail pressing beam are fixedly connected with the box Liang Liangmian through finish rolling deformed steel bars, namely six finish rolling deformed steel bars are correspondingly arranged, so that the longitudinal rail is fixed on the beam surface of the box beam. When the finish rolling deformed steel bars are connected, firstly, the length of the finish rolling deformed steel bars which are pre-buried in the box girder Liang Tizhong is measured by a ruler, and then the length of the finish rolling deformed steel bars which need blanking is measured by the ruler, so that the outer bushing head after being installed is ensured to meet the requirements. The finish rolling deformed steel bar is connected by adopting a split connector, so that the consistency of the screw lengths of the knobs at the two ends is ensured, and the running safety of the cantilever bridge fabrication machine is improved.

In this embodiment, two lifting door frames 7 are distributed and connected on each main beam, see fig. 1, and are respectively located at the front end and the rear end of the main beam, and when the longitudinal rail is moved, the main beam is supported. The jacking mast includes a jacking cross beam 71, jacking legs 72, and jacking cylinders 73, as shown in fig. 11. The jacking cross beam passes through the main beam and is fixedly connected with the main beam through a high-strength bolt, two jacking supporting legs are fixedly connected with two ends of the jacking cross beam, and a stiffening plate is adopted between the jacking cross beam and the jacking supporting legs for welding and fixing. The jacking oil cylinders are arranged at the bottoms of the jacking supporting legs and are connected through high-strength bolts, the single jacking oil cylinder is 150t, the maximum stroke is 10cm, and steel plates are supported and padded below the jacking oil cylinders. When the main beam walks, the jacking cylinder contracts to enable the main beam to be supported on the longitudinal rail, and at the moment, the walking traction device drives the main beam to move, so that the main beam moves to the construction surface; when the longitudinal rail runs, the jacking cylinder jacks up, so that the main beam is supported on the jacking cylinder and the box beam bridge deck, the longitudinal rail is completely separated from the bolster, the distance between the longitudinal rail and the bolster cannot be less than 5cm, and at the moment, the running traction device drives the longitudinal rail to move, so that the longitudinal rail moves to the box beam just after casting. When the jacking cylinder jacks up the main beam, the pressure of the jacking cylinder cannot exceed 63Mpa.

The running traction device is arranged between the main beam and the longitudinal rail, and the running traction device pulls the front roller assembly and the rear roller assembly on the longitudinal rail to move relatively with the guide rail and the slide rail on the main beam. The structure of the walking traction device in this embodiment is shown in fig. 12, and includes a front reaction seat 81, a rear reaction seat 82, an oil cylinder support 831, a mechanical self-locking through type oil cylinder 832, a clamping oil cylinder 84 and a pull rod 85, wherein the pull rod horizontally is disposed and sequentially passes through the rear reaction seat, the oil cylinder support, the mechanical self-locking through type oil cylinder, the clamping oil cylinder and the front reaction seat. In the embodiment, the pull rod is made of a high-strength steel rod with the diameter of 70mm, the material is Q355 low-alloy high-strength structural steel, the threading length at two ends of the pull rod is 300mm, and the front counterforce seat and the rear counterforce seat are convenient to fix.

The front counterforce seat and the rear counterforce seat are both fixed on the longitudinal central axis of the bottom of the main beam (namely, the front counterforce seat and the rear counterforce seat are both positioned in the middle of the two guide rails), as shown in fig. 13, and the front counterforce seat and the rear counterforce seat are respectively positioned at the front end and the middle of the main beam; specifically, reaction seat connecting plates (a front reaction seat connecting plate 811 at the front reaction seat is shown in the figure, and a rear reaction seat connecting plate 821 at the rear reaction seat) are arranged between the front reaction seat and the rear reaction seat and the main beam, and the front reaction seat or the rear reaction seat is fixedly connected with the main beam and the reaction seat connecting plates through high-strength bolts. Specifically, 16 circular holes are uniformly formed in the counterforce seat connecting plate and aligned with the connecting holes in the main beam and the front counterforce seat or the rear counterforce seat, and then the main beam and the front counterforce seat or the rear counterforce seat are fixedly connected together through high-strength bolts. The both ends and preceding counter-force seat and back counter-force seat fixed connection of pull rod, specifically, offered the pull rod hole along horizontal axis on preceding counter-force seat and the back counter-force seat, the pull rod passes the pull rod hole, and preceding counter-force seat or back counter-force seat are all fixed through nut and packing ring with the pull rod, twist two nut torsion to the design value when fixed.

Correspondingly, a round hole for a pull rod to pass through is also formed in the oil cylinder support, in this embodiment, the oil cylinder support is welded and fixed at the rear of the front roller seat, as shown in fig. 1 and 14, the oil cylinder support is also fixed at the front end of the longitudinal rail through high-strength bolts, and further, the oil cylinder support and the longitudinal rail are fixed through 12 high-strength bolts. The mechanical self-locking through type oil cylinder is fixedly connected with the oil cylinder support, specifically, an oil cylinder connecting plate 833 is arranged between the oil cylinder support and the mechanical self-locking through type oil cylinder, the oil cylinder support, the oil cylinder connecting plate and the mechanical self-locking through type oil cylinder are fixedly connected through high-strength bolts, as shown in fig. 15, the oil cylinder connecting plate is correspondingly provided with a round hole for a pull rod to pass through, and in addition, the oil cylinder support, the oil cylinder connecting plate and the mechanical self-locking through type oil cylinder are correspondingly provided with four bolt holes for connecting the high-strength bolts.

The clamping cylinder is fixedly connected with the mechanical self-locking through cylinder. Specifically, the mechanical self-locking through type oil cylinder is an intelligent digital oil cylinder, round holes for a pull rod to pass through are formed in central axes of the mechanical self-locking through type oil cylinder and the clamping oil cylinder, the mechanical self-locking through type oil cylinder and the clamping oil cylinder are respectively provided with self-locking and clamping functions, the clamping oil cylinder clamps the pull rod, the mechanical self-locking through type oil cylinder stretches to drive a main beam to move along a longitudinal track for a certain distance, the clamping oil cylinder is loosened again, the mechanical self-locking through type oil cylinder is contracted, the clamping oil cylinder clamps the pull rod, the mechanical self-locking through type oil cylinder stretches to sequentially repeat, and the main beam moves to a construction surface along the longitudinal track. In the embodiment, the limit of each travel of the mechanical self-locking through type oil cylinder is 60cm.

In this embodiment, a pad 86 is fixed on the cylinder support below the guide rail, the pad contacts the guide rail, and pads 87 are fixed on the pad along the longitudinal direction on both sides of the guide rail, and the pads also contact the guide rail, as shown in fig. 12 and 15. In this embodiment, two guide rails are disposed at the bottom of each main beam, so two backing plates are correspondingly disposed in each main beam, and four cushion blocks are correspondingly disposed. When the girder moves relative to the longitudinal track, the guide rail moves relative to the backing plate and the cushion block, so that the guide rail is prevented from being extruded and deformed.

Furthermore, the side surfaces of the guide rails are provided with graduated scales (not shown in the figure), and when the guide rails move relative to the cushion blocks, the running distances of the three main beams can be observed on site at any moment by reading one side of the cushion blocks.

In this embodiment, the upper ends of the mechanical self-locking through type oil cylinders are provided with infrared distance meters 88 towards the front reaction seats, the front reaction seats are provided with infrared reflecting plates 89 correspondingly, and the infrared distance meters and the infrared reflecting plates are located on the same horizontal axis, as shown in fig. 12. In this embodiment, there are three main beams, i.e. three sets of infrared rangefinders and infrared reflectors are correspondingly arranged. In the running process, the relative distance between the mechanical self-locking through type oil cylinder and the front counter-force seat is measured through real-time data fed back by the cooperation of the infrared range finder and the infrared reflecting plate. And dynamic verification is performed through the reading of the graduated scale, so that the synchronism and stability of the bridge fabrication machine are greatly improved.

In the embodiment, the jacking oil cylinder, the mechanical self-locking through type oil cylinder and the clamping oil cylinder are all connected with an intelligent hydraulic pump station (not shown in the figure), the intelligent hydraulic pump station and the infrared range finder are all connected with a PLC hydraulic control system, the PLC hydraulic control system receives data of the infrared range finder, and controls the stroke of the mechanical self-locking through type oil cylinder through the intelligent hydraulic pump station, and three main beams are controlled to synchronously walk, so that the whole cantilever bridge fabrication machine synchronously walks. The PLC hydraulic control system remotely controls the intelligent hydraulic pump station and simultaneously controls a plurality of groups of hydraulic cylinders, so that a one-key extending and one-key shrinking function is realized, the running of the complicated bridge fabrication machine is simplified, and the PLC hydraulic control system can also control the hydraulic cylinders to carry out left-right offset fine adjustment through the intelligent hydraulic pump station. In addition, be provided with the control platform on the intelligent hydraulic power unit, be provided with liquid crystal display work screen, manometer on the control platform, the accessible liquid crystal display work screen real time monitoring bridge fabrication machine walks the dynamic data of in-process, whether the operating pressure real-time value of every group hydraulic cylinder exceeds the scope value.

The travelling system of the cantilever bridge fabrication machine provided by the invention comprises the following steps: (1) Installing a longitudinal rail and a rail anchoring assembly on the girder surface of the box girder according to the installation procedure of the cantilever bridge fabrication machine, fixing the longitudinal rail on the girder surface of the box girder through finish rolling deformed steel bars in the rail anchoring assembly, and then installing a front roller assembly, a rear roller assembly, a main girder, a walking traction device and a jacking portal; at this time, the main girder and the longitudinal track are both positioned at the front end of the constructed box girder, as shown in fig. 1;

(2) And (3) walking of a main beam: when the jacking portal contracts, the main beam is supported on the longitudinal rail, the clamping cylinder clamps the pull rod, the mechanical self-locking through type cylinder stretches to drive the main beam to move along the longitudinal rail for a certain distance, the clamping cylinder is loosened and contracted, the mechanical self-locking through type cylinder clamps the pull rod again, the mechanical self-locking through type cylinder stretches to repeatedly make the main beam move to a construction surface (namely, to-be-poured box beam) along the longitudinal rail in sequence, and the main beam is completed to move, as shown in fig. 2 and 3; preparing a casting box girder, and carrying out running of a longitudinal rail after the casting of the box girder is completed;

(3) Running of the longitudinal rail: removing finish rolling screw steel in a rail anchoring assembly, jacking a portal frame to lift a girder, enabling a longitudinal rail to be separated from the rail anchoring assembly (bolster) below the portal frame, enabling a mechanical self-locking through type oil cylinder to extend, enabling a clamping oil cylinder to clamp a pull rod, contracting the mechanical self-locking through type oil cylinder to drive the longitudinal rail to move along the girder for a certain distance, loosening the clamping oil cylinder and extending the mechanical self-locking through type oil cylinder, enabling the clamping oil cylinder to clamp the pull rod again, enabling the mechanical self-locking through type oil cylinder to contract, and repeating the steps in sequence, enabling the longitudinal rail to move onto the box girder just poured, and completing the running of the longitudinal rail, wherein the running of the longitudinal rail is shown in fig. 4-6.

When the main beams and the longitudinal rails run, the jacking oil cylinder, the mechanical self-locking through type oil cylinder and the clamping oil cylinder are controlled by a PLC hydraulic control system, and the PLC hydraulic control system receives data of the infrared range finder and controls the three main beams to synchronously run so that the whole cantilever bridge fabrication machine synchronously runs.

Claims (10)

1. The utility model provides a walk traveling system of cantilever bridge fabrication machine, the group number of traveling system matches with the quantity of cantilever bridge fabrication machine girder, and traveling system installs in the below of girder, its characterized in that: each group of running systems comprises a longitudinal rail, a rail anchoring assembly, a front roller assembly, a rear roller assembly, a jacking portal frame and a running traction device, wherein the rear end of the longitudinal rail is in sliding connection with the main beam through the rear roller assembly; the bottom of each girder is provided with a guide rail along the longitudinal direction, and the front idler wheels are reversely buckled on the guide rails, so that the front ends of the longitudinal rails are in sliding connection with the girders; the longitudinal rails are detachably fixed on the girder surfaces of the box girders through the rail anchor assemblies, each girder is connected with two jacking door frames in a distributed mode, and jacking oil cylinders are arranged in the jacking door frames;

the walking traction device comprises a front counter-force seat, a rear counter-force seat, an oil cylinder support, a mechanical self-locking and punching type oil cylinder, a clamping oil cylinder and a pull rod, wherein the pull rod is horizontally arranged and sequentially passes through the rear counter-force seat, the oil cylinder support, the mechanical self-locking and punching type oil cylinder, the clamping oil cylinder and the front counter-force seat, the front counter-force seat and the rear counter-force seat are both fixed on a longitudinal central axis of the bottom of the main beam, the front counter-force seat and the rear counter-force seat are respectively positioned at the front end and the middle part of the main beam, and two ends of the pull rod are fixedly connected with the front counter-force seat and the rear counter-force seat; the mechanical self-locking through type oil cylinder is fixedly connected with the oil cylinder support, the clamping oil cylinder is fixedly connected with the mechanical self-locking through type oil cylinder, the clamping oil cylinder clamps the pull rod, and the mechanical self-locking through type oil cylinder stretches out and draws back, so that the main beam and the longitudinal rail are driven to move relatively;

the front roller seat is fixedly connected with the oil cylinder support, a base plate is fixed on the oil cylinder support below the guide rail and is contacted with the guide rail, cushion blocks are longitudinally fixed on two sides of the guide rail on the base plate and are also contacted with the guide rail, when the main beam moves on the track, the guide rail moves relative to the base plate and the cushion blocks, and graduated scales are arranged on the side surfaces of the guide rail; the infrared range finder is installed towards the front counter-force seat on the cylinder body of the mechanical self-locking through type oil cylinder, the infrared reflecting plate is correspondingly installed on the front counter-force seat, the infrared range finder and the infrared reflecting plate are positioned on the same horizontal axis, and the relative distance between the mechanical self-locking through type oil cylinder and the front counter-force seat is measured.

2. The walking system of cantilever bridge fabrication machine according to claim 1, wherein: the lifting oil cylinder, the mechanical self-locking through type oil cylinder and the clamping oil cylinder are all connected with an intelligent hydraulic pump station, the intelligent hydraulic pump station and the infrared range finder are all connected with a PLC hydraulic control system, the PLC hydraulic control system receives data of the infrared range finder, and the stroke of the mechanical self-locking through type oil cylinder is controlled through the intelligent hydraulic pump station, so that the whole cantilever bridge fabrication machine walks synchronously.

3. The walking system of cantilever bridge fabrication machine according to claim 1, wherein: the jacking portal comprises a jacking cross beam and jacking supporting legs, wherein the jacking cross beam penetrates through the main beam and is fixedly connected with the main beam, two jacking supporting legs are fixedly connected to two ends of the jacking cross beam, a jacking oil cylinder is arranged at the bottom of the jacking supporting legs and stretches out and draws back, so that the jacking portal is supported or separated from a box Liang Liangmian.

4. The walking system of cantilever bridge fabrication machine according to claim 1, wherein: the rear roller assembly comprises a rear roller seat, rear roller frames and rear rollers, wherein the rear roller seat is fixedly connected to the upper surface of the rear end of the longitudinal rail, two rear roller frames are fixedly arranged on the rear roller seat, and four rear rollers are arranged on the two rear roller frames; two sides of each girder are provided with sliding rails, and two rear idler wheels are respectively reversely buckled on the sliding rails on two sides of the girders.

5. The walking system of cantilever bridge fabrication machine according to claim 1, wherein: an oil cylinder connecting plate is arranged between the oil cylinder support and the mechanical self-locking through type oil cylinder, the oil cylinder support, the mechanical self-locking through type oil cylinder and the oil cylinder connecting plate are fixedly connected through high-strength bolts, and a round hole for a pull rod to pass through is correspondingly formed in the oil cylinder connecting plate.

6. The walking system of cantilever bridge fabrication machine according to claim 1, wherein: the front counterforce seat or the rear counterforce seat is fixedly connected with the main beam and the counterforce seat connecting plate through high-strength bolts; the horizontal axes on the front counter-force seat and the rear counter-force seat are respectively provided with a pull rod hole, the pull rods penetrate through the pull rod holes, and the front counter-force seat or the rear counter-force seat is fixed with the pull rods through nuts and washers.

7. The walking system of cantilever bridge fabrication machine according to claim 1, wherein: the longitudinal track comprises two section steel, the track anchor assembly comprises a bolster, a rail pressing beam and finish rolling deformed steel bars, the bolster is arranged on a box girder surface below the longitudinal track along transverse distribution, the rail pressing beams are arranged at the front end and the rear end of the longitudinal track along transverse distribution, and two ends of each rail pressing beam are fixedly connected with a box Liang Liangmian through the finish rolling deformed steel bars.

8. The walking system of cantilever bridge fabrication machine according to claim 7, wherein: three pillows are arranged at the front end of the longitudinal rail, and one bolster is arranged at the rear end of the longitudinal rail; the front end of the longitudinal rail is provided with a rail pressing beam, the rail pressing beam is positioned at the rear of the front roller assembly, the rear end of the longitudinal rail is provided with two rail pressing beams, and the two rail pressing beams are respectively positioned at the front and rear of the rear roller.

9. The walking system of cantilever bridge fabrication machine according to claim 1, wherein: the guide rails are made of square steel, two guide rails are arranged on two sides of the bottom of each main beam, two front roller frames are connected to the front roller seats, two front rollers are mounted on the two front roller frames, and the two front rollers are respectively reversely buckled on the two guide rails, so that the front rollers move along the guide rails.

10. A method of travelling a travelling system of a cantilever bridge fabrication machine according to claim 1, characterized by the steps of: (1) Installing a longitudinal rail and a rail anchoring assembly on the girder surface of the box girder according to the installation procedure of the cantilever bridge fabrication machine, fixing the longitudinal rail on the girder surface of the box girder through finish rolling deformed steel bars in the rail anchoring assembly, and then installing a front roller assembly, a rear roller assembly, a main girder, a walking traction device and a jacking portal; at this time, the main girder and the longitudinal track are both positioned at the front end of the constructed box girder;

(2) And (3) walking of a main beam: when the jacking portal contracts, the main beam is supported on the longitudinal rail, the clamping cylinder clamps the pull rod, the mechanical self-locking through type cylinder stretches to drive the main beam to travel a certain distance along the longitudinal rail, the clamping cylinder is loosened and contracted, the mechanical self-locking through type cylinder clamps the pull rod again, the mechanical self-locking through type cylinder stretches to sequentially repeat, so that the main beam travels to a construction surface along the longitudinal rail, and the traveling of the main beam is completed; preparing a casting box girder, and carrying out running of a longitudinal rail after the casting of the box girder is completed;

(3) Running of the longitudinal rail: removing finish rolling screw steel in a rail anchoring assembly, jacking a portal frame to lift a girder, enabling a longitudinal rail to be separated from the rail anchoring assembly below the portal frame, enabling a mechanical self-locking through type oil cylinder to extend, enabling a clamping oil cylinder to clamp a pull rod, contracting the mechanical self-locking through type oil cylinder to drive the longitudinal rail to move along the girder for a certain distance, loosening the clamping oil cylinder and extending the mechanical self-locking through type oil cylinder, enabling the clamping oil cylinder to clamp the pull rod again, enabling the mechanical self-locking through type oil cylinder to contract, and repeating in sequence, enabling the longitudinal rail to move onto a box girder which is just poured, and completing the moving of the longitudinal rail.