A traveling device and method for a continuous beam cantilever bridge building machine

Abstract

The present invention provides a walking device and method for a continuous beam cantilever bridge-building machine, and relates to the technical field of bridge-building equipment. The walking device includes: a base assembly, a chain and a chain box; the chain is composed of two sub-chains, the sub-chains are provided with rollers and chain teeth, and the two sub-chains can form a zipper-like bite through the chain teeth; the base assembly includes an assembly box, a splitting box and a side connecting plate; the assembly box is suitable for assembling the chain in a separated state into a bite state; the function of the splitting box is opposite to that of the assembly box; the assembly box and the splitting box are fixedly connected and form a first interval; a stopper is fixedly provided on the top of the assembly box; the chain passes through the assembly box and the splitting box, the chain located in the first interval is in a bite state, and the chain located outside the first interval is in a separated state; the chain box is a closed box body suitable for accommodating and guiding the sub-chains. The device overcomes the defects of the existing continuous beam cantilever bridge-building machine that adopts a sliding friction form, resulting in large movement resistance and uncoordinated movement.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction equipment, and particularly relates to a traveling device and method for a continuous beam cantilever bridge construction machine. Background Art

[0002] The continuous beam cantilever bridge construction process is a bridge construction process different from using precast beams or pouring the whole beam. Its process flow is to first pour the starting beam segment at the top of the bridge column, and then use the already poured beam segment as a support to extend the cantilever towards the bridge extension direction, and support the formwork for pouring the next beam segment through the cantilever support. After the new beam segment is poured, repeat the process section by section; and during construction, operations are carried out simultaneously at both ends of the bridge span, and finally the closure is completed at the center of the span.

[0003] Among them, the continuous beam cantilever bridge construction machine is mainly a device for supporting the beam segment formwork as a cantilever. Its main body is a truss 1 in a parallelogram structure, as can be seen in Figure 1 the relevant part shown. And a guide rail 5 made of I-beam is arranged between the truss 1 and the beam surface. A front support 2 is arranged at the front end of the bottom of the truss 1, and the bottom surface of the front support 2 abuts against the top surface of the I-beam guide rail 5; and a reverse pulley 4 is arranged at the rear end of the bottom of the truss 1, and the reverse pulley 4 extends into the grooves on both sides of the I-beam guide rail 5. When the bridge construction machine is in a traveling state, because the cantilever end of the truss 1 uses the front support 2 as a fulcrum, a seesaw-like effect is formed, so that the reverse pulley 4 tilts upward, and then is fastened to the lower surface of the top plate of the I-beam guide rail 5.

[0004] It can be seen that when the bridge construction machine travels, a reverse pulley 4 is arranged at the rear end of the bottom of the truss 1 to form rolling friction, but sliding friction with two plane contacts is adopted at the front end of the bottom of the truss 1, thus greatly increasing the traveling resistance. The most important reason for not arranging rollers at the front support 2 is that the main working state of the bridge construction machine is a fixed state, rather than a moving state. In the fixed state, sufficient friction needs to be formed between the truss 1 and the guide rail 5. When the truss 1 is fixed at the rear end, a pressing device is used to make the base of the reverse pulley 4 abut tightly against the top surface of the guide rail 5, and the reverse pulley 4 moves downward by itself without playing a role, that is, the force directions at the rear end of the truss 1 in the fixed state and the moving state are exactly opposite. Therefore, the friction can be reduced by arranging the reverse pulley 4 during movement, but the force direction at the front end of the bottom of the truss 1 is downward in both states. Arranging conventional rollers at the front support 2 is beneficial for movement, but not beneficial for the more important fixation, which seems to be penny-wise and pound-foolish.

[0005] However, in any case, when the truss 1 moves, the front support 2 at the location with the greatest pressure adopts a sliding friction form, which causes great movement resistance. This not only requires a driving device with extremely large thrust to be prepared, but also because a general bridge-building machine usually has multiple groups of trusses 1 and guide rails 5 arranged in parallel, and there are often large differences in friction between multiple groups of trusses 1 and guide rails 5. As a result, there are asynchronous displacements and lack of coordination among multiple groups of trusses 1. Especially when one side is fast and the other side is slow, it will cause the overall structure of the bridge-building machine to be distorted and reduce the strength of the connection structure between trusses 1. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of large movement resistance and uncoordinated movement caused by the sliding friction form of the front support in the existing continuous beam cantilever bridge-building machine.

[0007] To solve the above technical problem, the present application provides a traveling device for a continuous beam cantilever bridge-building machine for the traveling of the continuous beam cantilever bridge-building machine. The continuous beam cantilever bridge-building machine includes a front support located at the front end of the bottom of the truss and a guide rail cooperating with the front support;

[0008] It includes: a base assembly, a chain, and a chain box;

[0009] The width of the chain is not greater than the width of the guide rail. The chain is composed of two sub-chains, and the sub-chains are composed of multiple chain link units; each chain link unit includes a chain plate, a shaft rod, a roller, and a chain tooth; the chain plates of each chain link unit are sequentially hinged head to tail to form a chain loop; the tail end of the shaft rod is connected to the chain plate, the shaft rod is arranged perpendicular to the length direction of the sub-chain, the roller is sleeved outside the shaft rod with a clearance fit, and the chain tooth is arranged at the head end of the shaft rod; the two sub-chains can form a zipper-like bite through the chain teeth;

[0010] The base assembly includes an assembly box, a disassembly box, and side connection plates; the assembly box is suitable for assembling the chain in a separated state into a biting state; the disassembly box is suitable for disassembling the chain in a biting state into a separated state; a first interval suitable for accommodating the front support is formed between the assembly box and the disassembly box; both sides of the assembly box and the disassembly box are fixedly connected through a side connection plate; a stop block is fixedly arranged on the top of the assembly box on the side close to the first interval;

[0011] The chain passes through the assembly box and the disassembly box. The chain located in the first interval is in a biting state, and the chain located outside the first interval is in a separated state;

[0012] The chain box is a closed box body suitable for accommodating and guiding the sub-chain; a chain box is arranged on each side of the base assembly; the chain box is arranged in a loop between the same-side inlet of the assembly box and the same-side outlet of the disassembly box, so that the sub-chain separated on the same side forms a cycle; an opening suitable for the front support to pass through is formed between the two chain boxes on both sides.

[0013] Further, the shaft rod is rotatably connected to the link plate, and the shaft rod rotates circumferentially along the sub-chain.

[0014] The chain box includes two horizontal sections, one vertical section, and two conversion sections; one end of each of the two horizontal sections is respectively connected to the assembly box and the disassembly box, the other end of each of the two horizontal sections is respectively connected to a conversion section, and the vertical section is connected between the two conversion sections.

[0015] The shaft rod is in a flat relationship with the link plate within the horizontal section, the shaft rod is in a vertical relationship with the link plate within the vertical section, the conversion section is arranged between the horizontal section and the vertical section, the wall plate of the conversion section close to the roller is the guiding wall, and when the roller moves within the conversion section, it is deflected by the guiding wall, so that the shaft rod and the link plate are converted between the flat relationship and the vertical relationship.

[0016] Further, the link plate includes a main link plate and a sub-link plate. Both the main link plate and the sub-link plate are straight plates. Shaft seats are arranged at both ends of the inner side surface of the main link plate. The shaft seats are rotatably connected to the shaft rod through shaft rotation shafts. The two shaft rotation shafts belonging to the same main link plate are coaxial. Link joint rotation shafts are arranged at both ends of the outer side surface of the main link plate. When the shaft rod is in a flat relationship with the main link plate, the shaft rod is coaxial with the link joint rotation shaft; the head end of the sub-link plate is hinged to the link joint rotation shaft.

[0017] Further, the body of the shaft rod is a cylinder, and the head end of the shaft rod is set as a square shaft. A square hole adapted to the square shaft is opened on the chain tooth.

[0018] Further, the link joint unit further includes a pressing plate and a chain tooth bolt. The diameter of the body of the shaft rod is not less than the diagonal of the square shaft. A concave stop is arranged at one end of the chain tooth close to the shaft rod, and the concave stop is adapted to the head end of the body of the shaft rod. A sunken groove is arranged at the end of the chain tooth far from the shaft rod. The square hole communicates between the concave stop and the sunken groove, and the length of the square hole is greater than the length of the square shaft; the shape of the pressing plate is smaller than the cross-section of the sunken groove and larger than the cross-section of the square hole; the chain tooth bolt passes through the pressing plate and is threadedly connected to the head end of the square shaft, and the height of the nut of the chain tooth bolt is less than the depth of the sunken groove.

[0019] Further, guide plates are provided on both sides of the front support; a second interval is formed between the side connecting plate and the chain, and the second interval is adapted to accommodate the guide plates on both sides of the front support.

[0020] Further, guide blocks are arranged at both the front and rear ends of the bottom surface of the side connecting plate, and the guide blocks located on both sides of the base assembly can be clamped with both sides of the guide rail.

[0021] Further, bolt through holes are penetrated and opened on the side surface of the side connecting plate close to the chain, and the bolt through holes can be aligned with the threaded holes opened on both sides of the front support.

[0022] Further, the assembly cassette and the disassembly cassette are of an open structure on the side close to the guide rail. Both the assembly cassette and the disassembly cassette include side guide plates, and the outer side surfaces of the side guide plates are in full-length fit with and fixedly connected to the side connecting plates.

[0023] A method for the traveling of a continuous beam cantilever bridge building machine includes the following steps:

[0024] S01: Release the fixation between the front support and the guide rail;

[0025] S02: Jack up the front support;

[0026] S03: Push the guide rail forward until it is in place;

[0027] S04: Insert the traveling device of the continuous beam cantilever bridge building machine between the front support and the guide rail;

[0028] S05: Lower the front support;

[0029] S06: Push the front support forward until it is in place;

[0030] S07: Jack up the front support;

[0031] S08: Withdraw the traveling device of the continuous beam cantilever bridge building machine;

[0032] S09: Lower the front support;

[0033] S10: Fix the front support and the guide rail.

[0034] By adopting the above technical solution, the present invention has the following technical effects:

[0035] The traveling device of the continuous beam cantilever bridge building machine provided by the present invention, by arranging a chain with rollers, is equivalent to laying a lot of rollers between the front support and the guide rail, thus greatly reducing the movement resistance of the front support. Also, because the movement resistance between the front support and the guide rail in a single group is greatly reduced, the gap between the high and low resistances of multiple trusses is reduced, and the movement resistances of multiple trusses can be made to converge, enabling the multiple trusses to maintain a high degree of coordination and consistency during movement and reducing the problem of the overall distortion of the frame structure caused by some being fast and some being slow. In addition, since the chain is of a zipper structure, it can be divided into two sub-chains each with a width of half, and through the Y-shaped fork structure of the zipper, the sub-chains are deflected by a sufficient distance and then turned to form a cycle, avoiding opening holes in important load-bearing components such as trusses or front supports and ensuring the safety of the equipment. Additionally, the main body of this device is of a flattened structure, and its deployment and removal are very convenient. When the bridge building machine needs to move, this device is deployed and then removed after the movement, without increasing the operation difficulty of the traveling process and not adding too much to the operation complexity. Description of the Drawings

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 Schematic diagram of the present invention's embodiment in the use state;

[0038] Figure 2 Top view of the structural schematic of the present invention's embodiment;

[0039] Figure 3 For Figure 2 Cross-sectional view taken at A-A in

[0040] Figure 4 Exploded structural schematic diagram of the link unit of the present invention's embodiment;

[0041] Figure 5 Cross-sectional view of the structural schematic of the link unit of the present invention's embodiment;

[0042] Figure 6 Stereoscopic structural schematic diagram of the chain of the present invention's embodiment in the engaged state;

[0043] Figure 7 Top view of the structural schematic of the chain of the present invention's embodiment during the assembly process;

[0044] Figure 8 Stereoscopic structural schematic diagram of the chain of the present invention's embodiment within the conversion section of the chain box;

[0045] Figure 9 Schematic diagram of the structural relationship between the chain and the conversion section of the chain box of the present invention's embodiment;

[0046] Figure 10 Stereoscopic structural schematic diagram of the base assembly of the present invention's embodiment from the first perspective;

[0047] Figure 11 Stereoscopic structural schematic diagram of the base assembly of the present invention's embodiment from the second perspective.

[0048] Explanation of reference numerals:

[0049] 1 - Truss, 2 - Front support, 3 - Traveling device, 4 - Reverse pulley, 5 - Guide rail, 6 - Disassembly box, 7 - Side connecting plate, 8 - Second interval, 9 - Chain, 10 - Vertical roller, 11 - Stopper, 12 - Assembly box, 13 - Horizontal section, 14 - Conversion section, 15 - Vertical section, 16 - Chain box, 17 - Guide block, 18 - Stop pin, 19 - Stop piece, 20 - Shaft seat, 21 - Main link plate, 22 - Shaft, 23 - Square shaft, 24 - Chain tooth, 25 - Chain tooth bolt, 26 - Pressure plate, 27 - Roller, 28 - Shaft rotating shaft, 29 - Link rotating shaft, 30 - Sub-link plate, 31 - Concave stop, 32 - Square hole, 33 - Groove, 34 - Side guide plate, 35 - Wedge block, 36 - Guide wall, 37 - Bolt through hole, 38 - Support rod. Detailed implementation mode

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0051] It should be noted that in the description of the present invention, the coordinate system used to describe the orientation is determined by the attitude of the corresponding front view, and the viewing angle naming of the corresponding view is also based on this. Therefore, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0052] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0053] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] This embodiment provides a traveling device for a continuous beam cantilever bridge building machine, which is used for the traveling of the continuous beam cantilever bridge building machine. The continuous beam cantilever bridge building machine is generally as introduced in the background art, and at least includes a front support 2 at the front end of the bottom of the truss 1 and a guide rail 5 cooperating with the front support 2.

[0055] In one embodiment, as Figures 1 to 11 shown, the traveling device 3 includes a base assembly, a chain 9 and a chain box 16.

[0056] The width of the chain 9 is not greater than the width of the guide rail 5. The chain 9 is composed of two sub-chains, and the sub-chains are composed of a plurality of link units. Each link unit includes a link plate, a shaft rod 22, a roller 27 and a tooth 24. The link plates of each link unit are hinged head to tail in sequence to form a link ring; the tail end of the shaft rod 22 is connected to the link plate, the shaft rod 22 is arranged perpendicular to the length direction of the sub-chain, the roller 27 is sleeved outside the shaft rod 22 with a clearance fit, and the tooth 24 is arranged at the head end of the shaft rod 22. The two sub-chains can form a zipper-like bite through the teeth 24.

[0057] The base assembly includes an assembly box 12, a disassembly box 6 and side connecting plates 7. The assembly box 12 is suitable for assembling the chain 9 in a separated state into a biting state; the disassembly box 6 is suitable for disassembling the chain 9 in a biting state into a separated state. The assembly box 12 and the disassembly box 6 can refer to the existing zipper lock structure, and their structures are basically the same, both having side guide plates 34 and wedge-shaped blocks 35, but different functions are generated due to the different relative movement directions of the chain 9. Taking the biting process as an example, as can be seen in Figure 7 shown, under the constraint of the side guide plate 34 and the wedge-shaped block 35, the sub-chain can be turned. At the turning point, the distance between adjacent teeth 24 on one side of the sub-chain can be expanded, thereby forming an opening for accommodating the teeth 24 on the other side. When the teeth 24 on the other side enter the opening, the side guide plate 34 guides the two sub-chains to perform a parallel linear motion, so that the aforementioned opening is closed, and thus the teeth 24 on both sides are engaged with each other. Regarding the separation of the teeth 24, the reverse movement of the above process can be carried out.

[0058] Speaking back to the structure of this device, a first interval suitable for accommodating the front support 2 is formed between the assembly box 12 and the disassembly box 6; both sides of the assembly box 12 and the disassembly box 6 are fixedly connected through a side connecting plate 7 respectively; a stop block 11 is fixedly arranged on one side of the top of the assembly box 12 close to the first interval.

[0059] The chain 9 passes through the assembly box 12 and the disassembly box 6. The chain 9 located within the first interval is in a biting state, and the chain 9 located outside the first interval is in a separated state.

[0060] The chain box 16 is a closed box body suitable for accommodating and guiding the sub-chains. A chain box 16 is arranged on each side of the base assembly; the chain box 16 is arranged in a loop shape between the same-side inlet of the assembly box 12 and the same-side outlet of the disassembly box 6, so that the sub-chains separated on the same side form a loop. An opening suitable for the front support 2 to pass through is formed between the chain boxes 16 on both sides. In addition, because part of the chain box 16 may be in a suspended state, in order to better fix the chain box 16, a support rod 38 for supporting the chain box 16 can be arranged on the side connecting plate 7.

[0061] Regarding the specific use process of the device, first, the front support 2 is lifted up to form a sufficient gap between the front support 2 and the guide rail 5. Then, the front support 2 is inserted into the opening formed between the chain boxes 16 on both sides until the front support 2 reaches the top of the first interval. Because the chain 9 in the bite state is in the area of ​​the first interval, after the front support 2 is lowered, the chain 9 in the bite state is padded between the front support 2 and the guide rail 5. The shaft 22 of the chain 9 is sleeved with rollers 27, so it is equivalent to padded between the front support 2 and the guide rail 5. The movement resistance of the front support 2 is greatly reduced. Because the movement resistance of the front support 2 and the guide rail 5 in a single group is greatly reduced, the difference between the high and low resistance of multiple groups of trusses 1 is reduced, and the movement resistance of multiple groups of trusses 1 can be converged, so that the multiple groups of trusses 1 maintain a high degree of coordination and consistency during movement, and reduce the problem of overall distortion of the frame structure due to fast and slow movements. In addition, because the rolling body of the device is a large number of rollers 27, rather than a single or a small number of wheels, the collapse of the guide rail 5 due to the concentrated pressure can be avoided. Because the front support 2 is the central fulcrum of the seesaw structure of the truss 1, it is the place where the entire truss 1 is subjected to the greatest force. If a wheel is used as a rotating body, the wheel body and the track plane only form contact at the tangent point, and the contact area is very small. In the case of a small number of wheel bodies, the wheel body will form a huge contact stress on the guide rail 5, which can easily cause the collapse of the guide rail surface and make it uneven. Finally, the device has an overall flat structure at the supporting part, and can be inserted and removed without increasing the lifting height of the front support 2. It is very convenient to deploy and remove. When the bridge construction machine needs to be moved, the device is deployed and removed after the movement, which does not increase the difficulty of operation and does not increase the complexity of operation too much.

[0062] Regarding the specific working process of this device, the roller 27 on the chain 9 within the area of the first interval is squeezed between the front support 2 and the guide rail 5. When the front support 2 moves, it will drive the roller 27 to roll forward together. However, the moving speed of the roller 27 is half of the moving speed of the front support 2, and the roller 27 moves backward relative to the front support 2. During this relative movement process, the front end of the front support 2 will eventually abut against the stop block 11, thereby forcing the base assembly to move at the same speed as the front support 2. In this way, the chain 9 will generate a relative displacement relative to the assembly box 12, the disassembly box 6, and the chain box 16, thus providing power for the assembly box 12 and the disassembly box 6 to perform their respective functions.

[0063] The reason for engaging the chain 9 laid under the front support 2 and splitting it in the other sections is to enable the chain 9 to achieve circular operation without involving opening holes in the load-bearing structures of the truss 1 or the front support 2. Generally speaking, the simplest and most effective solution is a scheme where the track runs in a circular motion on the same operating plane, like a caterpillar track. However, for the front support 2 located at the bottom end of the truss 1, a caterpillar-like scheme would cause the chain 9 to cross over the top of the front support 2 or pass through the front support 2, which would require opening corresponding wide and flat holes in the truss 1 or the front support 2. But since the truss 1 and the front support 2 are important load-bearing components, opening a wide and flat hole that almost cuts them off would significantly reduce their strength and is not conducive to the safety of the equipment. In this device, the chain 9 adopts a zipper structure. The disassembly box 6 not only splits the chain 9 into two halves, reducing the width of the single chain, but also naturally forms a Y-shaped fork structure as a whole, which can deflect and extend the split sub-chains to both sides of the front support 2, so that the sub-chains can turn after deflecting a sufficient distance, and then the sub-chains can bypass the truss 1 or the front support 2 from the side, avoiding opening holes in the load-bearing structures of the truss 1 or the front support 2. The reason for not using two deflectable chains without interaction but engaging the two chains within the laying interval is that the rollers 27 within the laying interval need to maintain a parallel state to avoid the problem of roller skew and deviation. Therefore, after the two sub-chains are engaged by the chain teeth 24, for the rollers 27 that were originally in a cantilever state, their free ends are fixed and cannot be skewed or deviated.

[0064] Based on the above-described embodiment, in a preferred embodiment, as Figures 4 to 8 shown, the shaft rod 22 is rotatably connected to the chain plate, and the shaft rod 22 rotates circumferentially along the sub-chain.

[0065] In addition, as Figure 2 and 3As shown, the chain box 16 includes two horizontal sections 13, an upright section 15, and two transition sections 14. One end of each of the two horizontal sections 13 is connected to the assembly box 12 and the disassembly box 6 in a one-to-one correspondence, the other ends of the two horizontal sections 13 are each connected to a transition section 14, and the upright section 15 is connected between the two transition sections 14.

[0066] The shaft rod 22 is in a flat relationship with the chain plate within the horizontal section 13, that is, Figure 5 the positional relationship shown in. The shaft rod 22 is in a perpendicular relationship with the chain plate within the upright section 15, that is, Figure 2 and 3 the situation shown by the upright roller 10 in. The transition section 14 is provided between the horizontal section 13 and the upright section 15. As shown in Figure 9 , the wall plate of the transition section 14 close to the roller 27 is the guiding wall 36. When the roller 27 moves within the transition section 14, it is deflected by the guiding wall 36, causing the shaft rod 22 to be converted between a flat relationship and a perpendicular relationship with the chain plate. The conversion process can be referred to Figure 8 the content shown.

[0067] After the above settings, the split sub-chain can bypass from the side of the truss 1 or the front support 2 with a smaller width, which is beneficial to reducing the overall size of the device. Because if the split sub-chain bypasses the truss 1 or the front support 2 in a flat state, the sub-chain needs to extend obliquely until it extends out the width of the entire sub-chain in the width direction, that is, half of the width of the chain 9. This not only causes the device to extend a relatively large distance to both sides, but also because the sub-chain extends obliquely in a Y shape, it also makes the size of the device in the front-back distance relatively large. After the shaft rod 22 is rotatably connected to the chain plate in this embodiment, when the shaft rod 22 rotates circumferentially along the chain plate and finally forms a perpendicular relationship, the width of the sub-chain can be made approximately equal to the width of the roller 27 in the width direction, thus greatly reducing the width of the sub-chain. In this way, the deflection distance of the sub-chain to the side is reduced; and with the cooperation of the transition section 14, the sub-chain is deflected while the roller 27 also swings, so that the extension distance of the sub-chain in the front-back longitudinal direction caused by the oblique extension can be greatly shortened, thereby greatly reducing the overall size of the device.

[0068] Based on the above embodiment, in a preferred embodiment, as shown in Figure 4 and 5As shown, the link plate includes a main link plate 21 and a sub-link plate 30, both the main link plate 21 and the sub-link plate 30 being straight plates. At both ends of the inner side surface of the main link plate 21, there are provided shaft seat 20, and the shaft seat 20 is rotatably connected to the shaft 22 through a shaft rotating shaft 28. The two shaft rotating shafts 28 belonging to the same main link plate 21 are coaxial. At both ends of the outer side surface of the main link plate 21, there are provided link rotating shafts 29. When the shaft 22 is in a flat relationship with the main link plate 21, the shaft 22 is coaxial with the link rotating shaft 29. The head end of the sub-link plate 30 is hinged to the link rotating shaft 29. In order to prevent the sub-link plate 30 from disengaging, a blocking mechanism such as a retaining pin 18 should be provided. In addition, in order to improve the stress condition at the hinge, and reduce the damage to the link rotating shafts 29 with different rotation directions when the sub-chain deflects in the assembly cassette 12 and the disassembly cassette 6, a retaining plate 19 can be provided on the outer side of the hinge of the sub-link plate 30 to enhance the overall rigidity of the components at the hinge and prevent the link rotating shaft 29 from bending after being stressed.

[0069] The main link plate 21 and the sub-link plate 30, both being straight plates, can minimize the stretching amount of the chain 9 after long-term operation, thereby ensuring that the adjacent chain teeth 24 have appropriate pitches. In this case, by arranging both the link rotating shaft 29 and the shaft seat 20 on the inner main link plate 21, the coaxiality of the link rotating shaft 29 and the shaft 22 in the flat relationship can be ensured. The coaxiality of the link rotating shaft 29 and the shaft 22 is beneficial to the self-steering of the sub-chain, because the roller 27 as the rotating body is located at the link rotation position, which can reduce the obstruction and friction during link rotation. In addition, the shaft rotating shafts 28 at both ends of the main link plate 21 are coaxial, which can ensure that the shaft 22 can rotate circumferentially around the main link plate 21, prevent interference after the roller 27 deflects, and make the deflection direction of the roller 27 perpendicular to the force direction when the roller 27 rolls on the pad, avoiding the problem of deflection and then deviation of the roller 27 from the main link plate 21 when the roller 27 rolls on the pad.

[0070] Based on the above embodiments, in a preferred embodiment, as Figure 4 and 5As shown in the figure, the rod body of the shaft rod 22 is a cylinder, and the head end of the shaft rod 22 is set as a square shaft 23. A square hole 32 adapted to the square shaft 23 is provided on the chain tooth 24. After such a setting, it can be ensured that the chain tooth 24 always maintains the correct posture, avoiding the chain tooth 24 from flipping driven by the rotation of the roller 27, so that the engaging surface of the chain tooth 24 rotates to an incorrect position. Of course, if the linear type of the engaging surface is used to process the chain tooth 24 in a rotary manner, that is, the chain tooth 24 is turned into a rotary body part, the problem that the chain tooth 24 cannot be engaged after rotation can also be avoided. However, because the chain tooth 24 of this scheme is a rotary body, the contact area of its mutually engaging part is small, and the force-bearing situation is not as good as that of the block scheme. Therefore, the block scheme is preferably adopted in this embodiment, and the chain tooth 24 is prevented from rotating together by setting the square shaft 23 and the square hole 32. Although the square hole 32 is not easy to be processed by cutting, because the chain tooth 24 with a relatively complex curved surface is often preferably made by casting, it is very convenient to cast the square hole 32 at the same time during casting.

[0071] Based on the above embodiment, in a preferred embodiment, as Figure 4 and 5 shown, the link unit further includes a pressing plate 26 and a chain tooth bolt 25. The diameter of the rod body of the shaft rod 22 is not less than the diagonal of the square shaft 23, so that the square shaft 23 and the rod body of the shaft rod 22 form a stepped structure. One end of the chain tooth 24 close to the shaft rod 22 is provided with a concave stop 31, and the concave stop 31 is adapted to the head end of the rod body of the shaft rod 22. The end of the chain tooth 24 far from the shaft rod 22 is provided with a counterbore 33, and the square hole 32 communicates between the concave stop 31 and the counterbore 33, and the length of the square hole 32 is greater than the length of the square shaft 23. The shape of the pressing plate 26 is smaller than the cross-section of the counterbore 33 and larger than the cross-section of the square hole 32. The chain tooth bolt 25 passes through the pressing plate 26 and is threadedly connected to the head end of the square shaft 23, and the height of the nut of the chain tooth bolt 25 is less than the depth of the counterbore 33.

[0072] With such a setting, the chain tooth 24 can be firmly connected to the shaft rod 22, and maintenance operations are convenient. When the roller 27 is worn out excessively or oil is injected into the hole and needs to be removed, the roller 27 can be pulled out by simply removing the chain tooth 24, without removing other parts of the chain 9. In addition, the connection method of the concave stop 31 and the rod body of the shaft rod 22 can improve the overall rigidity of the connected chain tooth 24 and shaft rod 22 compared with the scheme of only connecting through the relatively thin square shaft 23, and ensure that the correct pitch is always maintained between adjacent chain teeth 24 in the separated state. In addition, after the counterbore 33 is provided, the chain tooth bolt 25 as a connecting piece does not protrude from the surface of the chain tooth 24, avoiding its influence on the engagement of the chain tooth 24.

[0073] In existing continuous beam cantilever bridge - building machines, some of the front supports 2 have guide plates on both sides, so that the front support 2 can be better guided by the guide rail 5. In such a case, in order to avoid interference between the guide plates of the front support 2 and this device, in this preferred embodiment, a second interval 8 is formed between the side connecting plate 7 and the chain 9, as Figure 2 shown. The second interval 8 can accommodate the guide plates on both sides of the front support 2, so that the guide plates of the front support 2 are inserted between the side connecting plate 7 and the chain 9, so that the chain 9 can still maintain good contact with the supporting surface of the front support 2.

[0074] Based on the above - mentioned embodiment, in a preferred embodiment, as Figure 10 and 11 shown, guide blocks 17 are provided at both the front and rear ends of the bottom surface of the side connecting plate 7. The guide blocks 17 located on both sides of the base assembly can be clamped with both sides of the guide rail 5. Generally, the height of the guide plates of the front support 2 is not too high and cannot form a guiding fit with the guide rail 5 after passing through the second interval 8. Therefore, in order to ensure the guiding property of the front support 2, in this embodiment, guide blocks 17 are provided on the bottom surface of the side connecting plate 7 to replace the guide plates of the front support 2 and form guidance for the front support 2 through this device itself. The reason for using two guide blocks 17 at the front and rear ends of the side connecting plate 7 instead of using an integral strip - shaped component is to adapt to the situation where the guide plates of the front support 2 of some equipment are high enough and the guide plates of the front support 2 are sufficient to form a fit with the guide rail 5. The guiding part between the two guide blocks 17 is still the guide plate of the front support 2, and the guide blocks 17 only become auxiliary components.

[0075] Based on the above - mentioned embodiment, in a preferred embodiment, as Figure 10 and 11As shown, bolt through-holes 37 are formed through the side surface of the side connecting plate 7 close to the second interval 8. The bolt through-holes 37 can be aligned with the threaded holes opened on both sides of the front support 2. In the previous embodiment, as a force transmission component between the front support 2 and the guide rail 5, the force conduction path involves many components such as the guide block 17, the side connecting plate 7, the assembly box 12, the disassembly box 6, and the chain 9. However, components such as the chain 9, the assembly box 12, and the disassembly box 6 are important components related to the engagement and disassembly of the chain 9. They are prone to unnecessary deformation under the action of additional forces, thereby hindering the engagement and disassembly functions of the chain 9. Therefore, in this embodiment, bolt through-holes 37 are provided on the side connecting plate 7, and threaded holes are opened on the guide plate of the front support 2 and aligned with each other. In this way, the side connecting plate 7 and the front support 2 are fixed together by bolts, so that the conduction path of the guiding force mainly only involves the side connecting plate 7, avoiding components such as the chain 9, the assembly box 12, and the disassembly box 6 from being affected by the guiding force. In addition, the reason for choosing to open threaded holes on the guide plate of the front support 2 and forming a tensile relationship between the side connecting plate 7 and the front support 2 through bolts, rather than opening threaded holes on the side connecting plate 7 and tightening the bolts against both sides of the front support 2, is that the guiding force of the front support 2 has a tendency to expand the distance between the guide blocks 17. The tensile relationship between the side connecting plate 7 and the front support 2 can offset the negative impact of this tendency, keeping the guide blocks 17 at a good distance; if the two are positioned by pressure, the tightening force of the bolts plus the expansion tendency of the guiding force of the front support 2 will easily cause the distance between the guide blocks 17 to increase, making the guide blocks 17 unable to be simultaneously clamped on both sides of the guide rail 5.

[0076] Based on the above embodiment, in a preferred embodiment, as Figure 10 and 11 shown, the assembly box 12 and the disassembly box 6 are of an open structure on the side close to the guide rail 5, that is, on the bottom surface side as the base assembly, which means that there is no wall plate on this surface, exposing the interiors of the assembly box 12 and the disassembly box 6.

[0077] If the assembly box 12 and the disassembly box 6 are provided with bottom plates, it will increase the height of the assembly box 12 and the disassembly box 6 to a certain extent, which is not conducive to making the whole device as flat as possible, thus facilitating insertion between the front support 2 and the guide rail 5. Moreover, the bottom plates of the assembly box 12 and the disassembly box 6 are also prone to scratching with the guide rail 5, increasing the running resistance. After removing this bottom plate, in addition to the above benefits, it will also be beneficial to the engagement and separation of the chain 9, because the rollers 27 in the separated state also contact the guide rail 5 and are thus subject to resistance from the guide rail 5; under the action of this resistance, the free end of the roller 27 in the separated state will have a more backward movement tendency relative to the connecting end; and because the roller 27 at this position is not in the first interval area under pressure, the resistance it receives is basically only generated by the self-weight of the roller 27, so the force is not large and does not have excessive coercion, and thus can become a power to assist the engagement and separation of the chain 9. Taking the engagement process as an example, reference can be made toFigure 7 For the roller 27, for the roller 27 that is about to turn inward, its free end is more forward relative to the connecting end. Therefore, after receiving the movement resistance from the guide rail 5, the free end has a greater tendency to move backward, so that the whole roller 27 forms a stronger tendency to turn inward. Compared with the original solution that only relies on the link plate to provide the biting power, this movement resistance from the guide rail 5 helps to complete the biting action of the chain 9. For the roller 27 that is about to separate, the movement resistance from the guide rail will increase the tendency of the roller 27 to turn outward, thus helping to realize the separation action.

[0078] In addition, as described above, both the assembly cassette 12 and the disassembly cassette 6 are provided with side guide plates 34. In this embodiment, it is preferably that the outer side surface of the side guide plate 34 is attached to and fixedly connected to the side connecting plate 7 over the entire length, for example, by welding. This is because after the side guide plate 34 lacks the connection and fixation of the bottom wall, it is prone to turn outward, resulting in problems such as inaccurate positioning and unsmooth biting and separating of the sub-chain. As described above, the side connecting plate 7 needs to transmit sufficient guiding force, so it has sufficient strength. Therefore, fixedly combining the side connecting plate 7 and the side guide plate 34 into one body over the entire length can greatly improve the strength of the side guide plate 34 and prevent the side guide plate 34 from turning outward.

[0079] In addition, this embodiment also provides a method for the continuous beam cantilever bridge erector to travel, including the following steps:

[0080] S01: Release the fixation between the front support 2 and the guide rail 5;

[0081] S02: Lift the front support 2;

[0082] S03: Push the guide rail 5 forward until it is in place;

[0083] S04: Insert the aforementioned continuous beam cantilever bridge erector traveling device between the front support 2 and the guide rail 5;

[0084] S05: Lower the front support 2;

[0085] S06: Push the front support 2 forward until it is in place;

[0086] S07: Lift the front support 2;

[0087] S08: Withdraw the aforementioned continuous beam cantilever bridge erector traveling device;

[0088] S09: Lower the front support 2;

[0089] S10: Fix the front support 2 and the guide rail 5.

[0090] Before the current continuous beam cantilever bridge-building machine moves forward, since the newly cast beam segment is used as a new working site and the newly built beam segment is in a completely new state with nothing on it yet, an operation of first jacking up the front support 2, that is, the truss 1, and then moving the guide rail 5 forward is always carried out. Therefore, the processes of steps S01 to S03 in the above method exist currently. For the existing method, after moving the guide rail 5 forward, the process of step S06 follows next, and finally steps S09 and S10 are used to conclude. Therefore, the newly added steps in this method are S04 to S05, and S07 to S08.

[0091] Steps S04 to S05 are operations carried out while the front support 2 has been jacked up. The insertion operation itself has no great difficulty, but only adds an operation of lowering the front support 2, slightly increasing the number of operation steps. For steps S07 to S08, compared with the original method, an additional jacking-up operation of the front support 2 is added. However, since the jacking-up operation of the front support 2 is not a completely new operation and has been carried out before, although the process complexity is increased, there is not much operation difficulty. Therefore, this method makes the movement of the bridge-building machine smoother without increasing the operation difficulty and moderately increasing the process complexity, and it is a method for the movement of a continuous beam cantilever bridge-building machine worthy of wide promotion and implementation.

[0092] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A traveling device for a continuous beam cantilever bridge-building machine, used for traveling the continuous beam cantilever bridge-building machine, the continuous beam cantilever bridge-building machine comprising a front support (2) located at the front end of the bottom of a truss (1) and a guide rail (5) matched with the front support (2); It is characterized in that include: Base assembly, chain (9) and chain box (16); The width of the chain (9) is not greater than the width of the guide rail (5), and the chain (9) is composed of two sub-chains, each of which is composed of a plurality of chain link units; the chain link unit comprises a chain plate, a shaft rod (22), a roller (27) and a chain tooth (24); the chain plates of each of the chain link units are hinged in sequence at the head and tail ends to form a chain ring; the tail end of the shaft rod (22) is connected to the chain plate, the shaft rod (22) is arranged perpendicular to the length direction of the sub-chain, the roller (27) is sleeved on the outside of the shaft rod (22) with a clearance fit, and the chain tooth (24) is arranged at the head end of the shaft rod (22); the two sub-chains can form a zipper-like bite through the chain tooth (24); The base assembly comprises an assembly box (12), a disassembly box (6) and a side connecting plate (7); the assembly box (12) is suitable for assembling a chain (9) in a separated state into an engaged state; the disassembly box (6) is suitable for disassembling a chain (9) in an engaged state into a separated state; a first interval suitable for accommodating the front support (2) is formed between the assembly box (12) and the disassembly box (6); the two sides of the assembly box (12) and the disassembly box (6) are fixedly connected by a side connecting plate (7); a stopper (11) is fixedly provided on the top of the assembly box (12) on one side close to the first interval; The chain (9) passes through the assembly box (12) and the disassembly box (6), the chain (9) located in the first interval is in an engaged state, and the chain (9) located outside the first interval is in a separated state; The chain box (16) is a closed box body suitable for accommodating and guiding the sub-chains; a chain box (16) is arranged on each side of the base assembly; the chain box (16) is arranged in a loop between the same-side inlet of the assembly box (12) and the same-side outlet of the separation box (6), so that the sub-chains separated on the same side form a loop; an opening suitable for the front support (2) to pass through is formed between the chain boxes (16) on both sides; The shaft rod (22) is rotatably connected to the chain plate, and the shaft rod (22) rotates along the circumference of the sub-chain; The chain box (16) comprises two horizontal sections (13), one vertical section (15) and two conversion sections (14); one end of the two horizontal sections (13) is connected to the assembly box (12) and the disassembly box (6) in a one-to-one correspondence, the other end of the two horizontal sections (13) is respectively connected to a conversion section (14), and the vertical section (15) is connected between the two conversion sections (14); The shaft rod (22) is in a flat relationship with the chain plate in the horizontal section (13), and in a vertical relationship with the chain plate in the vertical section (15). The conversion section (14) is arranged between the horizontal section (13) and the vertical section (15). The wall plate of the conversion section (14) close to the roller (27) is a guide wall (36). When the roller (27) moves in the conversion section (14), it is deflected by the guide wall (36), so that the shaft rod (22) and the chain plate are converted between a flat relationship and a vertical relationship.

2. The traveling device of the continuous beam cantilever bridge-building machine according to claim 1 is characterized in that: The chain plate comprises a main chain plate (21) and a secondary chain plate (30), both of which are straight plates. A shaft seat (20) is provided at both ends of the inner side surface of the main chain plate (21). The shaft seat (20) is rotatably connected to the shaft (22) via a shaft rotating shaft (28). Two shaft rotating shafts (28) belonging to the same main chain plate (21) are coaxial. Chain link rotating shafts (29) are provided at both ends of the outer side surface of the main chain plate (21); when the shaft (22) is in a flat relationship with the main chain plate (21), the shaft (22) and the chain link rotating shaft (29) are coaxial; and the head end of the secondary chain plate (30) is hinged to the chain link rotating shaft (29).

3. The traveling device of the continuous beam cantilever bridge-building machine according to claim 2 is characterized in that: The shaft of the shaft rod (22) is a cylinder, the head end of the shaft rod (22) is arranged as a square shaft (23), and a square hole (32) matching the square shaft (23) is provided on the chain tooth (24).

4. The traveling device of the continuous beam cantilever bridge-building machine according to claim 3 is characterized in that: The chain link unit further comprises a pressing plate (26) and a chain tooth bolt (25); the diameter of the shaft of the shaft (22) is not less than the diagonal of the square shaft (23); a concave stop (31) is provided at one end of the chain tooth (24) close to the shaft (22); the concave stop (31) is matched with the head end of the shaft of the shaft (22); a sink groove (33) is provided at one end of the chain tooth (24) away from the shaft (22); the square hole (32) is connected between the concave stop (31) and the sink groove (33); the length of the square hole (32) is greater than the length of the square shaft (23); the shape of the pressing plate (26) is smaller than the cross section of the sink groove (33) and larger than the cross section of the square hole (32); the chain tooth bolt (25) penetrates the pressing plate (26) and is threadedly connected to the head end of the square shaft (23); the nut height of the chain tooth bolt (25) is less than the depth of the sink groove (33).

5. The traveling device of the continuous beam cantilever bridge-building machine according to claim 1 is characterized in that: The front support (2) has guide plates on both sides; a second space (8) is formed between the side connecting plate (7) and the chain (9), and the second space (8) is suitable for accommodating the guide plates on both sides of the front support (2).

6. The traveling device of the continuous beam cantilever bridge-building machine according to claim 5 is characterized in that: Guide blocks (17) are provided at both the front and rear ends of the bottom surface of the side connecting plate (7), and the guide blocks (17) located on both sides of the base assembly can be clamped with both sides of the guide rail (5).

7. The traveling device of the continuous beam cantilever bridge-building machine according to claim 6 is characterized in that: A bolt through hole (37) is provided through the side surface of the side connecting plate (7) close to the second spacer (8), and the bolt through hole (37) can be aligned with the threaded holes provided on both sides of the front support (2).

8. The traveling device of the continuous beam cantilever bridge-building machine according to claim 7 is characterized in that: The assembly box (12) and the disassembly box (6) are open structures on one side close to the guide rail (5). The assembly box (12) and the disassembly box (6) both include a side guide plate (34). The outer side surface of the side guide plate (34) is in contact with and fixedly connected to the side connecting plate (7) over the entire length.

9. A method for traveling a continuous beam cantilever bridge-building machine, characterized in that: The steps include: S01: releasing the fixation between the front support (2) and the guide rail (5); S02: Lift the front support (2); S03: Push the guide rail (5) forward until it is in place; S04: inserting the walking device of the continuous beam cantilever bridge-building machine according to any one of claims 1 to 8 between the front support (2) and the guide rail (5); S05: lowering the front support (2); S06: Push the front support (2) forward until it is in place; S07: Lift the front support (2); S08: extracting the traveling device of the continuous beam cantilever bridge-building machine; S09: lowering the front support (2); S10: Fix the front support (2) and the guide rail (5).

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