A high-speed railway box girder support quick replacement device and box girder support quick replacement method

Abstract

The present invention discloses a high-speed railway box girder support rapid replacement device and a box girder support rapid replacement method, including a box girder support elevator and a cantilever crane, the main frame is provided with a fixing mechanism for fixing the frame between the box girder and the bridge pier, the main frame is provided with a synchronous lifting mechanism, the main frame is also provided with a track structure for translating the box girder support, the track structure is composed of a first track with a guiding function and a second track with a supporting function, the translation vehicle is also provided with a box girder support positioning assembly, when the lifting and lowering pallet is lifted to the maximum height, the box girder support is transferred from the lifting and lowering pallet to the translation vehicle through the box girder support fixing assembly. The beneficial effects of the present invention are: solving the problem of small construction space and inconvenient operation when replacing the existing box girder support, realizing the lifting and movement of the box girder support on the bridge pier, simplifying the operation, and improving the safety performance of the operation.

Description

Technical Field

[0001] The invention relates to the field of bridge construction technology, and in particular to a high-speed railway box girder support rapid replacement device and a box girder rapid support replacement method. Background Art

[0002] High-speed railway box girder supports are the most commonly used components in the construction of high-speed railway box girder erection. Taking the standard length of 32m and 24m box girders as an example, four types of supports, namely horizontal, longitudinal, fixed and multi-directional, are generally installed for each span. According to factors such as line type, geological conditions, and vehicle speed, each line will be equipped with supports of different load specifications. Taking the most commonly used TJQ-8360 series supports as an example, 4000-0.1g, 4500-0.1g, 5000-0.1g, 5500-0.1g, 6000-0.1g and other supports will be used. The size and weight of these supports vary greatly. After a certain period of use, high-speed railway box girder supports will be damaged, deformed, and component damaged due to construction factors, quality problems, climate and geology, repeated running of vehicles, and other factors, and need to be replaced in a timely manner.

[0003] The main difficulties in replacing the high-speed railway box girder bearings are as follows: 1. The construction space is small. The common 0.1g bearing has a height of 130mm-180mm, and the bottom surface of the beam is only 150mm-200mm from the upper surface of the pad stone. The removal of the old bearing and the installation of the new bearing are very limited. The platform for personnel to stand is generally 1.8m-1.9m away from the bottom surface of the beam, and the platform width is 0.8m-0.9m. Multiple, large equipment cannot be used in a small space. 2. The operating terrain is complex and the bridge piers are high. The ground around the bridge piers is uneven, difficult to approach, and even affected by rivers, making it difficult to use large equipment on the ground; the height of the high-speed railway piers can reach 20m, and it is difficult to lift the bearings. 3. The bearings are heavy. The maximum weight of the supports used in high-speed railway box girders is 290kg for 4000-0.1g, 393kg for 5000-0.1g, and 435kg for 5500-0.g. They are heavy and difficult to transport and lift. 4. Short operation time. The maintenance of existing high-speed railway bridges can only be carried out during the limited window time at night. It is necessary to complete the synchronous lifting of the beam, the removal of the old supports, the installation of the new supports, the return of the beam, and the pouring of the support grouting material. The time is tight.

[0004] During the replacement of box girder supports, due to the small construction space, complex working terrain, high bridge piers, and the heavy weight of the box girder supports to be replaced, most of the existing operations are mainly carried out manually, and the operating efficiency is low. Therefore, there is an urgent need for a device suitable for the replacement of box girder supports. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a high-speed railway box girder support rapid replacement device and a box girder support rapid replacement method.

[0006] The object of the present invention is achieved through the following technical solutions: a high-speed railway box girder support quick replacement device, comprising a box girder support elevator and a cantilever crane, wherein the box girder support elevator is composed of a main frame, a translation vehicle and a lifting pallet, wherein the main frame is composed of two main beams arranged in parallel, a front connecting crossbeam connecting the front ends of the two main beams, and a rear connecting crossbeam connecting the rear ends of the two main beams;

[0007] The main frame is provided with a fixing mechanism for fixing the frame between the box beam and the pier, the fixing mechanism is composed of a jacking screw installed on the tail connecting cross beam and a support leg installed on the two main beams. When replacing the box beam support, the jacking screw is in close contact with the bottom surface of the beam body adjacent to the box beam to be replaced, the support leg is in contact with the top surface of the pier, and the main beam extends out of the pier as a cantilever;

[0008] The main frame is provided with a synchronous lifting mechanism for lifting the box beam support, the synchronous lifting mechanism is installed on the main frame, and the movable end of the synchronous lifting mechanism is connected to the lifting support plate;

[0009] The main frame is also provided with a track structure for translating the box girder support, the track structure is composed of a first track that plays a guiding role and a second track that plays a supporting role, the translation vehicle is provided with an active walking mechanism and a driven walking mechanism, the active walking mechanism walks on the first track and drives the translation vehicle to translate, the driven walking mechanism walks on the second track and supports the translation vehicle, the translation vehicle is also provided with a box girder support positioning assembly, when the lifting pallet is lifted to the maximum height, the box girder support is transferred from the lifting pallet to the translation vehicle through the box girder support fixing assembly.

[0010] The number of the tightening screws is at least two and they are symmetrically distributed on the tail connecting cross beam. The height of the legs is adjustable and they are symmetrically distributed on the two main beams.

[0011] The synchronous lifting mechanism is composed of a winch motor, a linkage shaft, a winch roller group, a pulley group and a lifting steel rope. Four lifting points are evenly distributed on the lifting support plate. The linkage shaft is installed between the two main beams. The winch roller group is composed of winch rollers arranged at both ends of the linkage shaft. The pulley group is composed of pulleys with the same number as the lifting points, wherein the positions of the lifting points, winch rollers and pulleys correspond one to one. One end of the lifting steel rope is wound on the winch roller, and the other end of the lifting steel rope passes through the corresponding pulley and is connected to the corresponding lifting point. The winch motor drives the linkage shaft.

[0012] The first track includes a rack arranged on the inner side of the two main beams, the second track is the upper surface of the two main beams, and the directions of the first track and the second track are consistent.

[0013] The translation vehicle includes a fixed support plate, a movable support plate, a vehicle body traveling along a fixed track, a lifting mechanism for lifting a box beam support, and a traveling mechanism for driving the vehicle body to move. The vehicle body is composed of two parallel traveling frames and a base frame connecting the two traveling frames and fixed to the traveling frames as a whole. The lifting mechanism is composed of a front lifting cylinder group, a rear lifting cylinder group, and a lifting pump station. The front lifting cylinder group includes lifting cylinders respectively installed at the front ends of the two traveling frames, and the rear lifting cylinder group includes The lifting cylinders are respectively installed at the rear ends of the two traveling frames, the lifting pump station drives the front lifting cylinder group and the rear lifting cylinder group to perform synchronous actions at the same time, the fixed support plate is fixed on the lifting cylinder of the rear lifting cylinder group and is lifted by the lifting cylinder, the movable support plate is movably installed on the lifting cylinder of the front lifting cylinder group and is lifted by the cylinder, and the walking mechanism is composed of an active walking mechanism for driving the vehicle body to move and a driven walking mechanism for assisting walking;

[0014] The active walking mechanism comprises a transmission shaft and a driving gear mounted on the transmission shaft and driven by the transmission shaft, a driving motor for driving the transmission shaft to rotate is mounted on the base frame, and the driving gear is meshed with the rack;

[0015] The driven traveling mechanism is composed of a plurality of supporting wheels installed on two traveling frames. When the supporting wheels are in contact with the second track, the traveling frames are suspended. Therefore, when supporting, the supporting wheels can distribute the weight of the box beam supports to the contact surface, making the translation trolley more stable when moving, thereby achieving the purpose of assisting walking.

[0016] The fixed support plate and the movable support plate constitute a box beam support positioning assembly.

[0017] The lifting pump station is installed on the base frame and connected to the lifting cylinders in the front lifting cylinder group and the rear lifting cylinder group through oil circuits. Preferably, the lifting pump station adopts a one-to-four mode, which can realize the synchronous lifting of the push cylinders of the front lifting cylinder group and the rear lifting cylinder group, and can also realize the synchronous lifting of the lifting cylinders in the front lifting cylinder group or the rear lifting cylinder group. Due to the existing hydraulic pump station of the lifting pump station, it is not described here.

[0018] The active travel mechanism includes a transmission shaft and a driving gear mounted on the transmission shaft and driven by the transmission shaft. A driving motor for driving the transmission shaft to rotate is mounted on the base frame. A rack matching the transmission gear is provided on the fixed track on which the vehicle body travels. The driving motor drives the driving gear on the transmission shaft to rotate. Due to the meshing of the driving gear and the rack, the translation trolley is translated along the fixed track.

[0019] The number of the driving gears is two and they are symmetrically mounted at both ends of the transmission shaft, and the distance between the two driving gears is not less than the distance between the two carriages. The driven walking mechanism is composed of a plurality of supporting wheels mounted on the two carriages.

[0020] Preferably, the two support wheels are symmetrically distributed on the outside of the two traveling frames, which is beneficial to improve the stability of the translation of the translation trolley during movement. Preferably, the moving direction of the driven traveling mechanism is consistent with the moving direction of the active traveling mechanism.

[0021] The lifting cylinders of the front lifting cylinder group installed at the front ends of the two traveling frames are aligned, and the lifting cylinders of the rear lifting cylinder group installed at the rear ends of the two traveling frames are aligned.

[0022] The fixed pallet and the movable pallet are both provided with grooves for avoiding the upper and lower plate connecting parts of the box beam support. The box beam support is provided with an outer edge for fixing during lifting. During lifting, the fixed pallet and the movable pallet are clamped on the outer edge and support the box beam support.

[0023] The car body, fixed pallet, movable pallet, etc. are made of aluminum alloy with precision machining. At the same time, the four lifting cylinders are driven by an electric pump to lift and lower, and the trolley is driven by the motor reducer assembly. When the box beam seat rises, the trolley moves to the front end to avoid the support; when the box beam support reaches the highest position, the trolley moves, the fixed pallet enters under the support, and the movable pallet is installed manually. The lifting cylinder rises to bear the weight of the support. Then the trolley is translated to send the box beam support to the pad stone position, and the support cylinder is slowly raised until the bottom bolts of the beam are tightened, and the trolley is withdrawn to complete the replacement of the box beam support.

[0024] The cantilever crane includes a support frame body, a swing arm and a lifting assembly, wherein the support frame body includes a main frame, an upper support assembly and a lower support assembly, the upper end surface of the main frame is provided with a first mounting portion, the lower end surface of the main frame is provided with a second mounting portion, and the main frame is also provided with a third mounting portion, the upper support assembly is installed on the first mounting portion and contacts with the bottom surface of the box girder when the box girder support is replaced, the lower support assembly is installed on the second mounting portion and contacts with the top surface of the pier when the box girder support is replaced, the swing arm is rotatably installed on the third mounting portion, the swing arm is provided with a mounting frame that can be translated along the swing arm, and the lifting assembly is installed on the mounting frame.

[0025] The third mounting portion is located between the first mounting portion and the second mounting portion.

[0026] The main bracket is provided with a rotating shaft for mounting the swing arm, and the upper and lower ends of the rotating shaft are provided with limiting parts, and the third mounting part is composed of the rotating shaft and the limiting parts at the upper and lower ends thereof, and one end of the swing arm is provided with a sleeve for mounting on the rotating shaft. A bearing is provided between the rotating shaft and the sleeve.

[0027] The upper support assembly is composed of a plurality of support arms mounted on the first mounting portion, and each support arm is provided with a fine-tuning top. The structure of the lower support assembly is similar to that of the upper support assembly, and will not be described in detail here.

[0028] A kinematic pair for translation is arranged between the mounting frame and the swing arm. Preferably, the kinematic pair comprises a slide rail arranged on the swing arm and a slider installed on the mounting frame. Since there are many types of kinematic pairs, all kinematic pairs that can achieve translation are not listed here. The support arms are evenly distributed on the first mounting portion.

[0029] A method for quickly replacing a high-speed railway box girder support comprises the following steps:

[0030] S1. Assembly of cantilever crane: hoist the parts of cantilever crane to the pier of the box girder support to be replaced and assemble the cantilever crane;

[0031] S2, assembling the box girder support elevator: hoist the components of the box girder support elevator and the hydraulic jacking parts onto the bridge pier by a cantilever crane, assemble the box girder support elevator, the tightening screw of the box girder support elevator is in close contact with the bottom surface of the beam body adjacent to the box girder to be replaced, the support legs are in contact with the top surface of the pier, and the main beam extends from the pier as a cantilever;

[0032] S3. Replacement of box girder supports, including removal of old box girder supports and installation of new box girder supports;

[0033] The removal of the old box girder support includes the following steps: moving the translation trolley forward until the translation trolley is located under the box girder support, supporting the hydraulic jacking parts under the box girder to be replaced, and at the same time extending and rising the lifting cylinder of the lifting mechanism until the box girder support positioning assembly on the translation trolley contacts the outer edge of the fixed box girder support, removing the fixing bolts on the box girder support, lifting the box girder support by the translation trolley, moving the translation trolley backward until the translation trolley is located above the lifting pallet, contracting the lifting cylinder of the lifting mechanism until the box girder support on the translation trolley is supported on the lifting pallet, removing the movable pallet, and continuing to move the translation trolley backward until the fixed pallet is separated from the outer edge of the box girder support, and the synchronous lifting mechanism drives the lifting pallet to descend, thereby completing the removal of the old box girder support;

[0034] The installation of the new box girder support includes the following steps: install the new box girder support on the lifting pallet, the synchronous lifting mechanism drives the lifting pallet to rise, the translation trolley moves forward until the fixed pallet is located below the outer edge of the box girder support, and the movable pallet is installed at the same time. The lifting cylinder of the lifting mechanism extends, and the translation trolley bears the weight of the box girder support. The translation trolley continues to move forward until it moves to the bottom of the box girder. The lifting cylinder of the lifting mechanism continues to extend until the bolts of the bottom support of the beam are tightened, and then the movable pallet is removed. At the same time, the translation trolley withdraws to complete the installation of the new box girder support.

[0035] The beneficial effects of the present invention are as follows: (1) a fixed support plate and a movable support plate are arranged on the frame of the translation trolley. When positioning the box girder support, preliminary positioning is first performed by the fixed support plate, and then the box girder support is positioned according to the actual situation by the movable support plate, and then the lifting mechanism is used to lift the box girder support and the translation trolley is used to translate the box girder base, thereby realizing the fixation and translation of the box girder base, reducing manual operation and improving the safety performance of the operation; (2) an active walking mechanism and a driven walking mechanism for auxiliary walking are arranged on the translation trolley. During translation, the gear rack in the active walking mechanism is used for transmission, and at the same time, the weight of the box girder support is dispersed to the supporting surface through the support wheels of the driven walking mechanism, so that the movement of the translation trolley is more stable, further improving the safety performance of the operation; (3) a synchronously operating lifting mechanism is adopted and cooperates with the movement of the trolley to translate in a fixed track, thereby solving the problem of small construction space and inconvenient operation when replacing the existing box girder support and realizing the replacement of the box girder support. The movement of the seat on the pier simplifies the operation; (4) The upper and lower end surfaces of the main support of the cantilever crane are provided with an upper support component in contact with the bottom surface of the box girder and a lower support component in contact with the top surface of the pier, and the box girder support is fine-tuned and fixed by a fine-tuning top when the box girder support is replaced. The entire cantilever crane can be positioned according to the specific position of the box girder. At the same time, the pier and box girder are used as support bodies, and the lifting process is more stable when lifting the relevant replacement parts; the swing arm of the cantilever crane is rotatably installed on the third mounting part, and the angle of the swing arm can be determined according to the position of the pier and the platform, and it can be fixed, and then the relevant replacement parts can be lifted. It is not limited by the structure of the box girder and the platform, and has a wider range of use; (5) The entire box girder support replacement process improves the mechanization of the lifting of the box girder support replacement parts, reduces the dependence on manpower when lifting, transporting and lifting heavy objects, improves work efficiency, reduces the risk of high-altitude operations, reduces the difficulty of working in a small space and the personal injury caused thereby. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the box beam support lifting device of the present invention;

[0037] Figure 2 It is a top view of the box beam support elevator of the present invention;

[0038] Figure 3 It is a side view of the box beam support elevator of the present invention;

[0039] Figure 4 It is a structural schematic diagram of the translation vehicle of the present invention;

[0040] Figure 5 It is a front view of the translation vehicle of the present invention;

[0041] Figure 6 It is a side view of the translation vehicle of the present invention;

[0042] Figure 7 It is a structural schematic diagram of the cantilever crane of the present invention;

[0043] Figure 8 It is a front view of the cantilever crane of the present invention;

[0044] Fig. 9 is a side view of the cantilever crane of the present invention;

[0045] Fig.10 It is a top view of the cantilever crane of the present invention.

[0046] In the figure, 1, main frame, 2, translation vehicle, 3, lifting pallet, 4, cantilever crane, 101, main beam, 102, front connecting beam, 103, rear connecting beam, 104, tightening screw, 105, outrigger, 106, winch motor, 107, linkage shaft, 108, winch roller group, 109, pulley group, 110, lifting rope, 111, first track, 112, second track, 113-rack, 2-1, vehicle body, 2-2, fixed pallet, 2-3, movable pallet, 2-4, lifting mechanism, 2-5, walking mechanism, 2-6, trough, 2-101, traveling frame, 2-102, base frame, 2-401, front lifting cylinder group, 2-402, rear lifting cylinder Group, 2-403, lifting pump station, 2-404, lifting cylinder, 2-51, active walking mechanism, 2-52, driven walking mechanism, 2-511, transmission shaft, 2-512, driving gear, 2-513, driving motor, 2-521, supporting wheel, 4-1, supporting frame body, 4-2, swing arm, 4-3, lifting assembly, 4-101, main bracket, 4-102, upper supporting assembly, 4-103, lower supporting assembly, 4-104, first mounting part, 4-105, second mounting part, 4-106, third mounting part, 4-107, limiting part, 4-108, supporting arm, 4-109, fine-tuning top, 4-201, mounting frame, 4-202, sleeve. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0048] like Figure 1-Figure 3 As shown, a high-speed railway box girder support quick replacement device comprises a box girder support elevator and a cantilever crane 4, wherein the box girder support elevator is composed of a main frame 1, a translation vehicle 2 and a lifting pallet 3, wherein the main frame 1 is composed of two main beams 101 arranged in parallel, a front connecting beam 102 connecting the front ends of the two main beams 101, and a rear connecting beam 103 connecting the rear ends of the two main beams 101;

[0049] The main frame 1 is provided with a fixing mechanism for fixing the frame 1 between the box beam and the bridge pier. The fixing mechanism is composed of a tightening screw 104 installed on the tail connecting cross beam 103 and a support leg 105 installed on the two main beams 101. When replacing the box beam support, the tightening screw 104 is in close contact with the bottom surface of the beam body adjacent to the box beam to be replaced, and the support leg 105 is in contact with the top surface of the bridge pier. The main beam 101 extends out of the bridge pier as a cantilever.

[0050] The main frame 1 is provided with a synchronous lifting mechanism for lifting the box beam support, the synchronous lifting mechanism is installed on the main frame 1, and the movable end of the synchronous lifting mechanism is connected to the lifting support plate 3. It should be pointed out that the lifting support plate 3 is used to lift the box beam support. The lifting support plate 3 is provided with lifting pins and limit blocks and other existing technical means, which will not be described one by one. The lifting support plate 3 can stably support the box beam support;

[0051] The main frame 1 is also provided with a track structure for translating the box girder support, and the track structure is composed of a first track 111 that plays a guiding role and a second track 112 that plays a supporting role. The translation vehicle 2 is provided with an active walking mechanism 2-51 and a driven walking mechanism 2-52. The active walking mechanism 2-51 walks on the first track 111 and drives the translation vehicle 2 to translate, and the driven walking mechanism 2-52 walks on the second track 112 and supports the translation vehicle 2. The translation vehicle 2 is also provided with a box girder support positioning assembly. When the lifting pallet 3 is lifted to the maximum height, the box girder support is transferred from the lifting pallet 3 to the translation vehicle 2 through the box girder support fixing assembly.

[0052] The number of the tightening screws 104 is at least two and they are symmetrically distributed on the tail connecting cross beam 103 .

[0053] The legs 105 are height-adjustable and symmetrically distributed on the two main beams 101 .

[0054] Preferably, the synchronous lifting mechanism is composed of a winch motor 106, a linkage shaft 107, a winch roller group 108, a pulley group 109 and a lifting rope 110. Four lifting points are evenly distributed on the lifting support plate 3. The linkage shaft 107 is installed between the two main beams 101. The winch roller group 108 is composed of winch rollers arranged at both ends of the linkage shaft 107. The pulley group 109 is composed of pulleys with the same number as the lifting points, wherein the positions of the lifting points, winch rollers and pulleys correspond one to one. One end of the lifting rope 110 is wound on the winch roller, and the other end of the lifting rope 110 passes through the corresponding pulley and is connected to the corresponding lifting point. The winch motor 106 drives the linkage shaft 107, and the winch motor 106 is installed on the main frame 1 through a bracket. Preferably, the winch motor 106 is installed on any main beam 101. Each lifting point can be hoisted with a separate hoisting roller, or the same hoisting roller can be used for hoisting at the lifting points on the same side (the hoisting roller can be provided with a baffle to divide the hoisting area into two working areas that do not interfere with each other). Similarly, the hoisting roller can be driven by the same shaft or by different motors as long as synchronous action is achieved. Since there are many ways to achieve synchronous drive, this application does not list them one by one.

[0055] The first track 111 includes a rack 113 disposed on the inner side of the two main beams 101 , and the second track 112 is the upper surface of the two main beams 101 . The first track 111 and the second track 112 are in the same direction.

[0056] like Figure 4-Figure 6As shown, the translation vehicle 2 includes a fixed pallet 2-2, a movable pallet 2-3, a vehicle body 2-1 that travels along a fixed track, a lifting mechanism 2-4 for lifting a box beam support, and a traveling mechanism 2-5 for driving the vehicle body 2-1 to move. The vehicle body 2-1 is composed of two parallel traveling frames 2-101 and a base frame 2-102 that connects the two traveling frames 2-101 and is fixed to the traveling frames 2-101 as a whole. The lifting mechanism 2-4 is composed of a front lifting cylinder group 2-401, a rear lifting cylinder group 2-402, and a lifting pump station 2-403. The front lifting cylinder group 2-401 includes lifting cylinders respectively installed at the front ends of the two traveling frames 2-101. The rear lifting cylinder group 2-402 includes lifting cylinders respectively installed at the rear ends of the two traveling frames 2-101, the lifting pump station 2-403 simultaneously drives the front lifting cylinder group 2-401 and the rear lifting cylinder group 2-402 to perform synchronous actions, the fixed support plate 2-2 is fixed on the lifting cylinder of the rear lifting cylinder group 2-402 and is lifted by the lifting cylinder, the movable support plate 2-3 is movably installed on the lifting cylinder of the front lifting cylinder group 2-401 and is lifted by the cylinder, and the walking mechanism 2-5 is composed of an active walking mechanism 2-51 for driving the vehicle body 2-1 to move and a driven walking mechanism 2-52 for auxiliary walking;

[0057] The active walking mechanism 2-51 includes a transmission shaft 2-511 and a driving gear 2-512 installed on the transmission shaft 2-511 and driven by the transmission shaft 2-511. A driving motor 2-513 for driving the transmission shaft 2-511 to rotate is installed on the base frame 2-102, and the driving gear 2-512 is meshed with the rack 113;

[0058] The driven walking mechanism 2-52 is composed of a plurality of support wheels 2-521 mounted on two carriages 2-101. When the support wheels 2-521 are in contact with the second rail 2-112, the carriage 2-101 is suspended.

[0059] The fixed support plate 2-2 and the movable support plate 2-3 constitute a box beam support positioning assembly.

[0060] The lifting pump station 2-403 is installed on the base frame 2-102 and connected to the lifting cylinders in the front lifting cylinder group 2-401 and the rear lifting cylinder group 2-402 through the oil circuit. The lifting cylinder adopts CX-SD hydraulic thin cylinder, whose stroke can reach 50mm, and the maximum lifting force of a single cylinder can reach 200kg.

[0061] There are two driving gears 2-512, which are symmetrically installed at both ends of the transmission shaft 2-511, and the distance between the two driving gears 2-512 is not less than the distance between the two carriages 2-101.

[0062] The two support wheels 2-521 are symmetrically distributed on the outside of the two traveling frames 2-101. The support wheels 2-521 are made of high-strength bearing steel, which can effectively support and evenly distribute the weight of the box beam base to the support surface, making the movement of the translation trolley more stable.

[0063] The lifting cylinders of the front lifting cylinder group 2-401 installed at the front ends of the two traveling frames 2-101 are aligned, and the lifting cylinders of the rear lifting cylinder group 2-402 installed at the rear ends of the two traveling frames 2-101 are aligned.

[0064] The fixed support plate 2-2 and the movable support plate 2-3 are both provided with grooves 2-6 for avoiding the upper and lower plate connecting parts of the box beam support. According to existing data statistics, the maximum dimensions of the box beam support of 0.1g specification are A880, B650, C660, D660, H165; the maximum weight is 481kg. Therefore, in the present application, only the movable support plate and the fixed support plate need to be changed to meet the use requirements, which further increases the scope of application of the present application and can meet the needs of box beam supports of different models and specifications. For the box beam support of 0.1g specification, the size of the translation trolley in the present application can be 1.24m long, 1.076m wide, and 169mm high (when not lifted), and the weight of the whole machine is less than 160kg (including main frame: 70kg, translation trolley: 45kg; support plate 40kg) to meet the use conditions, and it is very convenient to manufacture. When lifting, the translation trolley moves forward (inside the pier), the fixed pallet enters under the support, and the movable pallet is manually installed. Then the lifting cylinder is raised to make the gap between the upper surface of the box beam support and the bottom surface of the beam 20mm, and the weight of the box beam support is transferred to the translation trolley, and then the translation trolley moves forward along the fixed track to send the box beam support to the pad stone position under the pier.

[0065] like Figure 7-Figure 10As shown, the cantilever crane 4 includes a support frame body 4-1, a swing arm 4-2 and a lifting assembly 4-3 (winch), wherein the support frame body 4-1 includes a main support 4-101, an upper support assembly 4-102 and a lower support assembly 4-103, the upper end surface of the main support 4-101 is provided with a first mounting portion 4-104, the lower end surface of the main support 4-101 is provided with a second mounting portion 4-105, the main support 4-101 is also provided with a third mounting portion 4-106, and the upper support assembly 102 is installed on the first mounting portion The mounting part 4-104 is in contact with the bottom surface of the box girder when the box girder support is replaced, the lower support assembly 4-103 is mounted on the second mounting part 4-105 and in contact with the top surface of the pier when the box girder support is replaced, the swing arm 4-2 is rotatably mounted on the third mounting part 4-106, and the swing arm 4-2 is provided with a mounting frame 4-201 which can translate along the swing arm 4-2 (a limit plate is provided at the end of the stroke of the swing arm 4-2 to prevent the mounting frame 4-201 from exceeding the limit stroke position), and the lifting assembly 4-3 is mounted on the mounting frame 4-201.

[0066] The third mounting portion 4-106 is located between the first mounting portion 4-104 and the second mounting portion 4-105.

[0067] The main bracket 4-101 is provided with a rotating shaft for installing the swing arm 4-2, and the upper and lower ends of the rotating shaft are provided with limiting parts 4-107. The third mounting part 4-106 is composed of the rotating shaft and the limiting parts 4-107 at its upper and lower ends. One end of the swing arm 4-2 is provided with a sleeve 4-202 for installation on the rotating shaft.

[0068] A bearing is arranged between the rotating shaft and the sleeve 4-202.

[0069] The upper support assembly 4-102 is composed of a plurality of support arms 4-108 mounted on the first mounting portion 4-104, and each of the support arms 4-108 is provided with a fine-tuning top 4-4-109. Preferably, the upper support assembly 102 is arranged in a three-point positioning manner, that is, the upper support assembly 4-102 is composed of three support arms 4-108 evenly distributed on the first mounting portion 4-104. The fine-tuning top 4-109 can be fine-tuned manually or electrically. The manual fine-tuning structure is more common, such as using a threaded top to fix the corresponding surface by moving the thread up and down. The electric fine-tuning can be achieved by an electric / pneumatic support cylinder, which is a prior art.

[0070] A kinematic pair for translation is provided between the mounting frame 4-201 and the swing arm 4-2.

[0071] The support arms 4-108 are evenly distributed on the first mounting portion 4-104.

[0072] When replacing parts of the lifting box girder support, first fix the support frame body 1 between the box girder and the pier of the support to be replaced (specifically, for piers of common structures, the support frame body 4-1 is installed in the groove on the pier platform. For some non-standard piers, the installation position is selected according to the actual situation. For example, due to the small operating space, there are many types of replacement parts and they are placed on both sides of the pier, the swing arm position needs to be adjusted). Then adjust the swing arm position and fix it, and move the lifting component 4-3 (winch) to perform the lifting operation. It should be noted that the rotation of the swing arm and the translation of the lifting component 4-3 (winch) can be locked by controlling the motor (such as swinging is driven by rotating the motor, and it can be locked when it rotates to a suitable angle, and the translation of the lifting component 4-3 can be driven by the motor). In the actual process, due to the limitation of conditions, the on-site technicians cannot realize electric locking, and they will also adopt manual locking methods, such as the swing arm rotation / lifting component 4-3 translation to a certain angle and locked by a fixing member (common thread locking). This method is a prior art and will not be described in detail. Preferably, the support frame body 4-1 and the swing arm of the cantilever crane are both made of steel.

[0073] A method for quickly replacing a high-speed railway box girder support comprises the following steps:

[0074] S1, assembling the cantilever crane 4: hoisting the components of the cantilever crane 4 onto the pier of the box girder support to be replaced and assembling the cantilever crane 4;

[0075] S2, assembling the box girder support elevator: hoist the components of the box girder support elevator and the hydraulic jacking parts onto the bridge pier by the cantilever crane 4, assemble the box girder support elevator, the tightening screw 104 of the box girder support elevator is in close contact with the bottom surface of the beam body adjacent to the box girder to be replaced, the support leg 105 is in contact with the top surface of the pier, and the main beam 101 extends out of the pier as a cantilever;

[0076] S3. Replacement of box girder supports, including removal of old box girder supports and installation of new box girder supports;

[0077] Among them, the removal of the old box girder support includes the following steps: moving the translation trolley 2 forward until the translation trolley 2 is located under the box girder support, supporting the hydraulic jacking parts under the box girder to be replaced, and at the same time, the lifting cylinder of the lifting mechanism 2-4 extends and rises until the box girder support positioning assembly on the translation trolley 2 contacts the outer edge of the fixed box girder support, removing the fixing bolts on the box girder support, lifting the box girder support by the translation trolley 2, moving the translation trolley 2 backward until the translation trolley 2 is located above the lifting pallet 3, the lifting cylinder of the lifting mechanism 2-4 contracts until the box girder support on the translation trolley 2 is supported on the lifting pallet 3, removing the movable pallet 2-3, and the translation trolley 2 continues to move backward until the fixed pallet 2-2 is separated from the outer edge of the box girder support, and the synchronous lifting mechanism drives the lifting pallet 3 to descend, thereby completing the removal of the old box girder support;

[0078] The installation of the new box girder support includes the following steps: the new box girder support is installed on the lifting pallet 3, and the synchronous lifting mechanism drives the lifting pallet 3 to rise (up to a gap of 20-30mm between the upper surface of the box girder support and the bottom surface of the beam), the translation trolley 2 moves forward until the fixed pallet 2-2 is located below the outer edge of the box girder support, and the movable pallet 2-3 is installed at the same time. The lifting cylinder of the lifting mechanism 2-4 is extended, and the translation trolley 2 bears the weight of the box girder support. The translation trolley 2 continues to move forward until it moves to the bottom of the box girder to be installed, and the lifting cylinder of the lifting mechanism 2-4 continues to extend until the bolts of the bottom support of the beam are tightened, then the movable pallet 2-3 is removed, and the translation trolley 2 withdraws at the same time to complete the installation of the new box girder support.

[0079] As described above, a method according to the present invention is described by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various improvements may be made to the method proposed by the present invention without departing from the content of the present invention, or some of the technical features thereof may be replaced by equivalents, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the contents of the attached claims.

Claims

1. A high-speed railway box girder support rapid replacement device, characterized in that: It comprises a box girder support elevator and a cantilever crane (4), wherein the box girder support elevator is composed of a main frame (1), a translation vehicle (2) and a lifting pallet (3), wherein the main frame (1) is composed of two main beams (101) arranged in parallel, a front connecting beam (102) connecting the front ends of the two main beams (101), and a rear connecting beam (103) connecting the rear ends of the two main beams (101); The main frame (1) is provided with a fixing mechanism for fixing the frame (1) between the box girder and the bridge pier, the fixing mechanism comprising a tightening screw (104) installed on the tail connecting cross beam (103) and a support leg (105) installed on the two main beams (101); when replacing the box girder support, the tightening screw (104) is in close contact with the bottom surface of the beam body adjacent to the box girder to be replaced, the support leg (105) is in contact with the top surface of the bridge pier, and the main beam (101) extends out from the bridge pier as a cantilever; The main frame (1) is provided with a synchronous lifting mechanism for lifting the box beam support, the synchronous lifting mechanism is installed on the main frame (1), and the movable end of the synchronous lifting mechanism is connected to the lifting support plate (3); The main frame (1) is also provided with a track structure for translating a box beam support, the track structure is composed of a first track (111) having a guiding function and a second track (112) having a supporting function, the translation vehicle (2) is provided with an active walking mechanism (2-51) and a driven walking mechanism (2-52), the active walking mechanism (2-51) travels on the first track (111) and drives the translation vehicle (2) to translate, the driven walking mechanism (2-52) travels on the second track (112) and supports the translation vehicle (2), the translation vehicle (2) is also provided with a box beam support positioning assembly, when the lifting plate (3) is lifted to a maximum height, the box beam support is transferred from the lifting plate (3) to the translation vehicle (2) through the box beam support fixing assembly; The translation vehicle (2) comprises a fixed support plate (2-2), a movable support plate (2-3), a vehicle body (2-1) that moves along a fixed track, a lifting mechanism (2-4) for lifting a box beam support, and a traveling mechanism (2-5) for driving the vehicle body (2-1) to move.

2. A high-speed railway box girder support rapid replacement device according to claim 1, characterized in that: The number of the tightening screws (104) is at least two and they are symmetrically distributed on the tail connecting crossbeam (103).

3. The high-speed railway box girder support quick replacement device according to claim 1 is characterized in that: The support legs (105) are height-adjustable and are symmetrically distributed on the two main beams (101).

4. The high-speed railway box girder support quick replacement device according to claim 1, characterized in that: The synchronous lifting mechanism is composed of a hoisting motor (106), a linkage shaft (107), a hoisting roller group (108), a pulley group (109) and a lifting steel rope (110). Four lifting points are evenly distributed on the lifting support plate (3). The linkage shaft (107) is installed between the two main beams (101). The hoisting roller group (108) is composed of hoisting rollers arranged at both ends of the linkage shaft (107). The pulley group (109) is composed of pulleys with the same number as the lifting points. The positions of the lifting points, hoisting rollers and pulleys correspond to each other. One end of the lifting steel rope (110) is wound on the hoisting roller, and the other end of the lifting steel rope (110) passes through the corresponding pulley and is connected to the corresponding lifting point. The hoisting motor (106) drives the linkage shaft (107).

5. The high-speed railway box girder support quick replacement device according to claim 1 is characterized in that: The first track (111) comprises a rack (113) arranged on the inner sides of the two main beams (101); the second track (112) is the upper surface of the two main beams (101); and the first track (111) and the second track (112) are in the same direction.

6. A high-speed railway box girder support rapid replacement device according to claim 5, characterized in that: The vehicle body (2-1) is composed of two parallel traveling frames (2-101) and a base frame (2-102) connecting the two traveling frames (2-101) and fixed to the traveling frames (2-101) as a whole. The lifting mechanism (2-4) is composed of a front lifting cylinder group (2-401), a rear lifting cylinder group (2-402) and a lifting pump station (2-403). The front lifting cylinder group (2-401) includes lifting cylinders respectively installed at the front ends of the two traveling frames (2-101), and the rear lifting cylinder group (2-402) includes lifting cylinders respectively installed at the rear ends of the two traveling frames (2-101). The lifting pump station (2-403) simultaneously drives the front lifting cylinder group (2-401) and the rear lifting cylinder group (2-402) to perform synchronous movements, the fixed support plate (2-2) is fixed on the lifting cylinder of the rear lifting cylinder group (2-402) and is lifted by the lifting cylinder, the movable support plate (2-3) is movably mounted on the lifting cylinder of the front lifting cylinder group (2-401) and is lifted by the lifting cylinder, and the walking mechanism (2-5) is composed of an active walking mechanism (2-51) for driving the vehicle body (2-1) to move and a driven walking mechanism (2-52) for assisting walking; The active walking mechanism (2-51) comprises a transmission shaft (2-511) and a driving gear (2-512) mounted on the transmission shaft (2-511) and driven by the transmission shaft (2-511); a driving motor (2-513) for driving the transmission shaft (2-511) to rotate is mounted on the base frame (2-102); and the driving gear (2-512) meshes with the rack (113); The driven walking mechanism (2-52) is composed of a plurality of supporting wheels (2-521) mounted on two carriage frames (2-101); when the supporting wheels (2-521) are in contact with the second rail (2-112), the carriage frame (2-101) is suspended in the air; The fixed support plate (2-2) and the movable support plate (2-3) constitute a box beam support positioning assembly.

7. A high-speed railway box girder support rapid replacement device according to claim 6, characterized in that: The lifting pump station (2-403) is installed on the base frame (2-102) and is connected to the lifting cylinders in the front lifting cylinder group (2-401) and the rear lifting cylinder group (2-402) through oil circuits; the number of the driving gears (2-512) is two and they are symmetrically installed at both ends of the transmission shaft (2-511), and the distance between the two driving gears (2-512) is not less than the distance between the two traveling frames (2-101); the two supporting wheels (2-521) are symmetrically distributed on the outsides of the two traveling frames (2-101); the lifting cylinders of the front lifting cylinder group (2-401) installed at the front ends of the two traveling frames (2-101) are aligned, and the lifting cylinders of the rear lifting cylinder group (2-402) installed at the rear ends of the two traveling frames (2-101) are aligned.

8. The high-speed railway box girder support quick replacement device according to claim 1, characterized in that: The cantilever crane (4) comprises a support frame body (4-1), a swing arm (4-2) and a lifting assembly (4-3), wherein the support frame body (4-1) comprises a main support (4-101), an upper support assembly (4-102) and a lower support assembly (4-103), the upper end surface of the main support (4-101) is provided with a first mounting portion (4-104), the lower end surface of the main support (4-101) is provided with a second mounting portion (4-105), the main support (4-101) is also provided with a third mounting portion (4-106), the The upper support assembly (4-102) is mounted on the first mounting portion (4-104) and contacts the bottom surface of the box girder when the box girder support is replaced; the lower support assembly (4-103) is mounted on the second mounting portion (4-105) and contacts the top surface of the pier when the box girder support is replaced; the swing arm (4-2) is rotatably mounted on the third mounting portion (4-106); the swing arm (4-2) is provided with a mounting frame (4-201) that can translate along the swing arm (4-2); and the lifting assembly (4-3) is mounted on the mounting frame (4-201).

9. A high-speed railway box girder support quick replacement device according to claim 8, characterized in that: The third mounting portion (4-106) is located between the first mounting portion (4-104) and the second mounting portion (4-105); a rotating shaft for mounting the swing arm (4-2) is arranged on the main bracket (4-101), and limiting portions (4-107) are arranged at both upper and lower ends of the rotating shaft; the third mounting portion (4-106) is composed of the rotating shaft and the limiting portions (4-107) at both upper and lower ends thereof; one end of the swing arm (4-2) is provided with a sleeve (4-202) for mounting on the rotating shaft; the upper support assembly (4-102) is composed of a plurality of support arms (4-108) mounted on the first mounting portion (4-104), and each of the support arms (4-108) is provided with a fine-tuning top (4-109).

10. A method for quickly replacing box beam supports based on the device for quickly replacing box beam supports of a high-speed railway according to claim 1, characterized in that: It includes the following steps: S1. Assembling the cantilever crane (4): hoisting the components of the cantilever crane (4) onto the pier of the box girder support to be replaced and assembling the cantilever crane (4); S2, assembling the box girder support elevator: hoisting the components of the box girder support elevator and the hydraulic jacking parts onto the bridge pier by means of a cantilever crane (4), assembling the box girder support elevator, the tightening screw (104) of the box girder support elevator is in close contact with the bottom surface of the beam body adjacent to the box girder to be replaced, the support leg (105) is in contact with the top surface of the pier, and the main beam (101) extends out of the pier as a cantilever; S3. Replacement of box girder supports, including removal of old box girder supports and installation of new box girder supports; The removal of the old box girder support comprises the following steps: moving the translation trolley (2) forward until the translation trolley (2) is located below the box girder support, supporting the hydraulic jacking part below the box girder to be replaced, and extending and rising the lifting cylinder of the lifting mechanism (2-4) until the box girder support positioning assembly on the translation trolley (2) contacts the outer edge of the fixed box girder support, removing the fixing bolts on the box girder support, lifting the box girder support by the translation trolley (2), moving the translation trolley (2) backward until the translation trolley (2) is located above the lifting support plate (3), contracting the lifting cylinder of the lifting mechanism (2-4) until the box girder support on the translation trolley (2) is supported on the lifting support plate (3), removing the movable support plate (2-3), and continuing to move the translation trolley (2) backward until the fixed support plate (2-2) is separated from the outer edge of the box girder support, and the synchronous lifting mechanism drives the lifting support plate (3) to descend, thereby completing the removal of the old box girder support; The installation of the new box girder support comprises the following steps: installing the new box girder support on the lifting support plate (3), the synchronous lifting mechanism drives the lifting support plate (3) to rise, the translation trolley (2) moves forward until the fixed support plate (2-2) is located below the outer edge of the box girder support, and the movable support plate (2-3) is installed at the same time, the lifting cylinder of the lifting mechanism (2-4) extends, the translation trolley (2) bears the weight of the box girder support, the translation trolley (2) continues to move forward until it moves to the bottom of the box girder, the lifting cylinder of the lifting mechanism (2-4) continues to extend until the bottom support bolts of the beam are tightened, the movable support plate (2-3) is removed, and the translation trolley (2) withdraws at the same time, completing the installation of the new box girder support.

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