A beam-replacement apparatus

Abstract

The embodiment of the present application provides a beam replacing device, which comprises a main beam, two auxiliary legs, two transport trolleys and two main legs. The two auxiliary legs are arranged at two ends of the main beam, and the auxiliary legs can be extended and retracted along the length direction perpendicular to the main beam. The two auxiliary legs can be supported on the two transport trolleys respectively. The two main legs are arranged at the two ends of the main beam respectively, and the main legs can be extended and retracted along the direction perpendicular to the main beam. The beam replacing device has a transport working condition and a beam erecting working condition. In the transport working condition, the auxiliary legs are supported on the transport trolleys, and the main legs are separated from the support surface. In the beam erecting working condition, the main legs are supported on the support surface, and the auxiliary legs are separated from the support surface. The auxiliary legs of the jacking main beam are provided, the wear problem of the existing L-shaped frame type main leg jacking is avoided, and the reliability of the beam replacing device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge beam replacement, and in particular to a beam replacement device. BACKGROUND

[0002] The existing beam replacement device usually comprises a main beam and a main leg connected with the main beam, and the main leg is usually an L-shaped frame structure. In the process of vertically lifting the main beam, a large bending moment exists in the vertical part, which easily causes abrasion of the telescopic part structure, poor durability of the device, and short service life. SUMMARY

[0003] The beam replacement device provided by the embodiments of the present application solves the problem of abrasion of the L-shaped frame type main leg during lifting.

[0004] The embodiments of the present application provide the following technical solutions:

[0005] A beam replacement device comprises:

[0006] a main beam;

[0007] two auxiliary legs, the two auxiliary legs are arranged at two ends of the main beam, and the auxiliary legs can be telescopically extended and retracted along a direction perpendicular to the length of the main beam;

[0008] two transport trolleys, the two auxiliary legs can be respectively supported on the two transport trolleys;

[0009] two main legs, the two main legs are arranged at two ends of the main beam, and the main legs can be telescopically extended and retracted along a direction perpendicular to the main beam;

[0010] The beam replacement device has a transport working condition and a beam erection working condition. In the transport working condition, the auxiliary legs are supported on the transport trolleys, and the main legs are separated from the support surface. In the beam erection working condition, the main legs are supported on the support surface, and the auxiliary legs are separated from the support surface.

[0011] Optionally, the auxiliary legs have a first multi-stage telescopic arm, and the main legs have a second multi-stage telescopic arm.

[0012] The vertical distance between the fulcrum of the auxiliary leg and the first multi-stage telescopic arm is less than the vertical distance between the fulcrum of the main leg and the second multi-stage telescopic arm.

[0013] Optionally, the main legs are located between the two auxiliary legs along the length direction of the main beam.

[0014] Optionally, the auxiliary legs are reversibly connected to the main beam.

[0015] A lifting trolley is movably arranged on the main beam.

[0016] In the beam erecting mode, the auxiliary support leg is turned to be parallel to the main beam to avoid the trolley.

[0017] Optionally, the auxiliary support leg comprises:

[0018] an upper cross beam connected to the main beam perpendicularly;

[0019] two first multi-stage telescopic arms, each of which is located at the two ends of the upper cross beam along the length direction, and each of which is connected to the upper cross beam through at least one pin shaft;

[0020] a telescopic component connected to the upper cross beam or the main beam, and drivingly connected to the first multi-stage telescopic arm;

[0021] In the beam erecting mode, only one pin shaft connects the upper cross beam and the first multi-stage telescopic arm, and the telescopic component is elongated or shortened to drive the first multi-stage telescopic arm to be turned to be parallel to the main beam.

[0022] Optionally, the auxiliary support leg has an upper core disc, and the transport trolley is provided with a lower core disc.

[0023] In the transport mode, the auxiliary support leg is perpendicular to the main beam, and the upper core disc is connected to the lower core disc.

[0024] In the beam erecting mode, the upper core disc is separated from the lower core disc, and the auxiliary support leg is turned to be parallel to the main beam.

[0025] Optionally, the auxiliary support leg has a leveling system, and the leveling system comprises a first telescopic support leg assembly.

[0026] Optionally, the main support leg comprises two side support frames.

[0027] Each of the two side support frames is arranged at the two sides of the main beam along the width direction, and each of the two side support frames is connected to the main beam.

[0028] The side support frame is rotatably arranged, the rotation axis of the side support frame is perpendicular to the main beam, and the side support frame can rotate around the rotation axis to approach or move away from the main beam.

[0029] Optionally, the main support leg comprises an upper connecting beam connected to the main beam, and the upper connecting beam extends out of the two sides of the main beam along the width direction.

[0030] Each of the two side support frames is rotatably connected to the two ends of the upper connecting beam.

[0031] Optionally, the main support leg further comprises a lower connecting beam.

[0032] Two side support frames are respectively rotatably connected to two ends of the lower connecting beam.

[0033] A second telescopic supporting leg assembly is arranged on the lower connecting beam.

[0034] By adopting the technical scheme, the application has the following beneficial effects:

[0035] The application provides an auxiliary supporting leg for the jacking main beam, and avoids the wear problem of the existing L-shaped frame type main supporting leg. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0037] Figure 1 A schematic view of the beam replacement equipment in a transportation condition is provided for the embodiment of the application;

[0038] Figure 2 A schematic view of the beam replacement equipment performing a beam replacement operation is provided for the embodiment of the application;

[0039] Figure 3 A state view of the jacking main beam of the beam replacement equipment is provided for the embodiment of the application;

[0040] Figure 4 A sectional view at the main supporting leg of the beam replacement equipment is provided for the embodiment of the application;

[0041] Figure 5 A schematic view of the main supporting leg of the beam replacement equipment in a folded state is provided for the embodiment of the application;

[0042] Figure 6 A sectional view at the auxiliary supporting leg of the beam replacement equipment is provided for the embodiment of the application;

[0043] Figure 7 A state view of the auxiliary supporting leg of the beam replacement equipment supported on a bridge surface is provided for the embodiment of the application;

[0044] Figure 8 A partial enlarged view of Figure 7 ;

[0045] Figure 9 A state view of the auxiliary supporting leg of the beam replacement equipment jacked to a high position is provided for the embodiment of the application;

[0046] Figure 10 A state view of the main supporting leg of the beam replacement equipment supported in place is provided for the embodiment of the application;

[0047] Figure 11A schematic view of the auxiliary legs of the girder replacement equipment provided by the embodiment of the present application in a retracted state;

[0048] Figure 12 A state view of the auxiliary legs of the girder replacement equipment provided by the embodiment of the present application after being folded;

[0049] Figure 13 A schematic view of the auxiliary legs of the girder replacement equipment provided by the embodiment of the present application in a folded state;

[0050] Figure 14 A state view of the leveling system of the girder replacement equipment supported on a support surface;

[0051] Figure 15 A state view of the telescopic arm of the head end of the girder replacement equipment being jacked up;

[0052] Figure 16 A state view of the telescopic arm of the middle part of the girder replacement equipment being jacked up;

[0053] Figure 17 A schematic view of the auxiliary legs of the girder replacement equipment provided by the embodiment of the present application in a folded state;

[0054] Figure 18 A schematic view of the trolley of the girder replacement equipment provided by the embodiment of the present application;

[0055] Figure 19 A front view of the trolley of the girder replacement equipment provided by the embodiment of the present application;

[0056] Figure 20 A partial structure view of the trolley of the girder replacement equipment provided by the embodiment of the present application;

[0057] Figure 21 A top view of the trolley of the girder replacement equipment provided by the embodiment of the present application;

[0058] Figure 22 A schematic view of the cooperation structure of the lifting tool and the lifting rope of the trolley of the girder replacement equipment provided by the embodiment of the present application;

[0059] Figure 23 A schematic view of the cooperation structure of the lifting rope and the simply supported girder body of the trolley of the girder replacement equipment provided by the embodiment of the present application.

[0060] Reference signs:

[0061] 1, main beam; 2, auxiliary support leg; 21, upper cross beam; 22, first multi-stage telescopic arm; 221, telescopic arm; 221a, guide sleeve; 221b, connecting beam; 23, telescopic part; 24, jacking part; 25, lower cross beam; 26, balance beam; 27, rotating hinge; 28, leveling oil cylinder; 29, supporting lead screw; 3, main support leg; 31, upper connecting beam; 32, second multi-stage telescopic arm; 33, lower connecting beam; 34, second telescopic support leg assembly; 5, lifting trolley; 51, hanger; 511, connecting beam frame; 5111, vertical beam; 5112, cross beam; 512, beam body; 5121, sliding table; 52, hoisting mechanism; 521, fixed pulley assembly; 522, movable pulley assembly; 5221, second ear seat; 523, winch; 53, lifting appliance; 531, lifting appliance body; 5311, guide shaft; 532, tensioning beam; 533, first ear seat; 54, lifting belt; 55, electrical hydraulic control box; 56, guide pulley; 57, running system; 58, longitudinal running motor; 59, driving gear; 6, transport trolley; a, pin shaft; b, simply supported beam body; c, telescopic device. DETAILED DESCRIPTION

[0062] In order to make the technical solutions and advantages in the embodiments of the present application clearer, the exemplary embodiments of the present application are further described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0063] Embodiment one

[0064] Referring to Figures 1 to 23 It is shown that the embodiment one of the present application provides a beam replacement equipment, which comprises a main beam 1, two auxiliary support legs 2, two transport trolleys 6 and two main support legs 3. The two auxiliary support legs 2 are arranged at the two ends of the main beam 1, and can be telescopically extended along the direction perpendicular to the length of the main beam 1. The two auxiliary support legs 2 can be supported on the two transport trolleys 6 respectively. The two main support legs 3 are arranged at the two ends of the main beam 1 respectively, and can be telescopically extended along the direction perpendicular to the main beam 1. The beam replacement equipment has a transport working condition and a beam erection working condition. In the transport working condition, the auxiliary support legs 2 are supported on the transport trolleys 6, and the main support legs 3 are separated from the support surface. In the beam erection working condition, the main support legs 3 are supported on the support surface, and the auxiliary support legs 2 are separated from the support surface.

[0065] The main support legs 3 are used to support the temporary hole bridge at the two ends of the bridge to be replaced in the beam replacement construction process, and are the main force support legs, so as to ensure the safety of the temporary hole bridge during the beam replacement, and the auxiliary support legs 2 are supported on the transport trolley, and the load bearing equipment is transported on the railway.

[0066] When the beam replacement equipment lifts the main beam 1, it first lifts the main beam 1 using auxiliary support legs 2. After the main beam 1 is lifted, the main support legs 3 are adjusted so that they support the main beam 1, facilitating the subsequent beam replacement operation by the lifting trolley 5. This application provides auxiliary support legs 2 for lifting the main beam 1, avoiding the wear and tear problem of existing L-shaped frame-type main support legs 3 during lifting.

[0067] The auxiliary outrigger 2 has a first multi-stage telescopic arm 22, and the main outrigger 3 has a second multi-stage telescopic arm 32. The vertical distance between the fulcrum of the auxiliary outrigger 2 and the first multi-stage telescopic arm 22 is less than the vertical distance between the fulcrum of the main outrigger 3 and the second multi-stage telescopic arm 32.

[0068] A fulcrum refers to the point where the auxiliary outrigger 2 or the main outrigger 3 rests on a supporting surface, which can be a bridge deck. In this embodiment, the vertical distance between the fulcrum of the auxiliary outrigger 2 and the first multi-stage telescopic arm 22 is less than the vertical distance between the fulcrum of the main outrigger 3 and the second multi-stage telescopic arm 32. It is worth noting that the vertical distance from the fulcrum to the telescopic arm mentioned here is a comparison with the auxiliary outrigger 2 and the main outrigger 3 in their respective supporting states.

[0069] This configuration ensures that, compared to the main support leg 3, the auxiliary support leg 2 experiences a significantly smaller bending moment under the same load (e.g., when supporting the main beam). This greatly reduces the expansion and contraction wear of the auxiliary support leg 2 during the lifting process. In contrast to related designs that directly use the main support leg to lift the main beam, resulting in significant expansion and contraction wear due to the large bending moment experienced by the main support leg during lifting, this embodiment utilizes the auxiliary support leg 2 to first lift the main beam to the target height. Then, the main support leg 3 extends without load to support the main beam. Because the auxiliary support leg 2 experiences a smaller bending moment, its expansion and contraction wear is greatly reduced. Therefore, the solution in this embodiment significantly reduces expansion and contraction wear during the lifting of the support leg structure, effectively protecting the main support leg and extending the equipment's service life.

[0070] Furthermore, according to the scheme of this application embodiment, the main beam is lifted by auxiliary support legs instead of main support legs. The main support legs do not need to be set on the transport trolley, but can be suspended. This can make full use of the space on the transport trolley, more effectively avoid the whole vehicle of the beam replacement equipment exceeding the limit for long fixed distances, and is also beneficial to the structural design of the main support legs.

[0071] In one possible implementation, see Figure 1 As shown, the main support leg 3 is located between the two auxiliary support legs 2 along the length of the main beam 1. The two auxiliary support legs 2 are located at both ends of the main beam 1, while the two main support legs 3 are located inwards on the main beam 1, so that the auxiliary support legs 2 can be supported on the transport trolley 6.

[0072] In one possible implementation, see Figure 1 andFigure 2 As shown, the auxiliary support leg 2 is rotatably connected to the main beam 1, and a lifting trolley 5 is movably mounted on the main beam 1. During the beam erection process, the auxiliary support leg 2 is rotated to be parallel to the main beam 1 to avoid the lifting trolley 5.

[0073] In this implementation scheme, during the girder erection process, the auxiliary support leg 2 can be folded up to be parallel to the main beam 1, and rotated to fold back to be flush with the main beam 1, thereby avoiding the crane trolley 5 set on the main beam 1, allowing the crane trolley 5 to travel along the main beam 1 to the beam feeding position. For example, the main beam 1 has a guide rail on its lower side for the crane trolley 5 to travel on, and after the auxiliary support leg 2 is folded up, it is at least higher than the position of the guide rail.

[0074] In one possible implementation, see Figure 6 as well as Figures 13 to 17 As shown, the auxiliary support leg 2 includes: an upper crossbeam 21, a telescopic component 23, and two first multi-stage telescopic arms 22. The upper crossbeam 21 is vertically connected to the main beam 1. The two first multi-stage telescopic arms 22 are located at both ends of the upper crossbeam along its length, and the first multi-stage telescopic arms 22 are connected to the upper crossbeam 21 by at least two pins a. The telescopic component 23 is connected to the upper crossbeam or the main beam 1, and the telescopic component 23 is drively connected to the first multi-stage telescopic arms 22. In the beam erection condition, only one pin a connects the upper crossbeam and the first multi-stage telescopic arm 22. The extension or retraction of the telescopic component 23 causes the first multi-stage telescopic arm 22 to rotate parallel to the main beam 1.

[0075] In one possible implementation, two first connecting ears are respectively provided at both ends of the upper crossbeam 21, and the two first connecting ears are respectively provided on both sides of the upper crossbeam along the width direction. Two second connecting ears are provided at the end of the first multi-stage telescopic arm 22. The two second connecting ears are respectively connected to the corresponding first connecting ears on the same end of the upper crossbeam by a pin a, and at least one of the pins a is detachable.

[0076] In the supported state, the auxiliary support leg 2 is connected to the upper crossbeam via two pins a. During the process of the auxiliary support leg 2 lifting the main beam 1, the two pins a resist the torque of the upper crossbeam. When it is necessary to fold the auxiliary support leg 2 after lifting the main beam 1, one pin a can be removed, and the auxiliary support leg 2 is in a rotatable state. At this time, the auxiliary support leg 2 can be driven to swing via the telescopic component 23. This telescopic component can be a telescopic hydraulic cylinder.

[0077] The first multi-stage telescopic arm 22 includes multiple telescopic arms 221, with adjacent telescopic arms 221 slidably connected. The telescopic arm at the head end of the first multi-stage telescopic arm 22 is connected to the upper crossbeam 21 via a pin a, and the telescopic component is drivenly connected to the telescopic arm at the head end. The first multi-stage telescopic arm 22 is composed of multiple nested telescopic arms.

[0078] The auxiliary outrigger 2 includes a lifting component 24, which can drive each of the telescopic arms to extend and retract. Each telescopic arm in its extended state can be connected and fixed to an adjacent telescopic arm via a locking member to maintain its extended state.

[0079] See Figure 15 and Figure 16 As shown, the telescopic arm includes two guide sleeves 221a. In two adjacent telescopic arms 221, the two guide sleeves 221a of one arm are slidably connected to the two guide sleeves 221a of the other arm. The use of two guide sleeves 221a improves the support stability of the auxiliary outrigger 2. The two guide sleeves 221a are connected as a single unit and can be raised and lowered synchronously.

[0080] The telescopic boom 221 includes a connecting beam 221b connecting the two guide sleeves 221a. The movable end of the lifting component 24 is selectively connected to either of the connecting beams 221b to drive the corresponding telescopic boom to extend or retract. The connecting beam 221b serves both to connect the two guide sleeves 221a and to provide a fulcrum, allowing the lifting component 24 to be connected to it. The lifting component 24 can be a telescopic cylinder, and the telescopic end of the cylinder can be connected to different connecting beams 221b via a pin a.

[0081] Taking the first multi-stage telescopic boom 22, which includes three telescopic booms 221, as an example, the three telescopic booms 221 are the upper telescopic boom, the middle telescopic boom, and the lower telescopic boom. During the extension of the side telescopic frame, the lifting component 24 first lifts the upper telescopic boom (i.e., the telescopic boom at the head end of the side telescopic frame 22), then connects and fixes the upper telescopic boom and the middle telescopic boom, the lifting component 24 retracts, and then lifts the middle telescopic boom, connecting and fixing the middle telescopic boom and the lower telescopic boom.

[0082] The lifting component 24 is disposed on the telescopic arm (lower telescopic arm) at the tail end of the first multi-stage telescopic arm 22, and the lifting component 24 is located between the two guide sleeves 221a of the telescopic arm at the tail end. In this way, during the extension and retraction of the lifting component 24, each telescopic arm can be smoothly lifted up, and each telescopic arm will not tilt during the lifting process.

[0083] Optionally, the auxiliary support leg 2 of the beam-changing equipment includes a lower crossbeam 25, to which both of the first multi-stage telescopic arms 22 are connected. The lower crossbeam 25 is provided with an upper core plate, which can be connected to or detached from the lower core plate on the transport trolley 6. When the upper core plate is supported by the lower core plate, the auxiliary support leg 2 can remain stably vertical without tilting. When the auxiliary support leg retracts, the upper core plate detaches from the lower core plate, allowing for easy folding of the auxiliary support leg 2. The upper and lower core plates are structures commonly found in the art, for example, on trains, and are considered prior art; their structure will not be described in detail here.

[0084] The auxiliary support leg 2 of the beam replacement equipment includes a leveling system connected to the lower crossbeam 25, and the leveling system has a first telescopic support leg assembly. (See also...) Figure 14 As shown, when the auxiliary outrigger 2 needs to be supported on the support surface, the first telescopic outrigger assembly can be adjusted to extend and support the support surface. Before lifting the main beam 1, the auxiliary outrigger 2 needs to be supported on the support surface and the main beam 1 needs to be leveled to facilitate a smooth lifting of the main beam 1. The leveling system is set on both sides of the lower crossbeam 25 and has lateral and longitudinal adjustment functions.

[0085] Furthermore, the leveling system also includes a balance beam 26 and a rotating hinge 27, wherein the balance beam 26 is connected to the lower crossbeam 25 via the rotating hinge 27. The first telescopic support leg assembly includes a leveling cylinder 28 and a support screw 29, both of which are connected to the balance beam 26. Both the leveling cylinder 28 and the support screw 29 can extend and retract in a direction perpendicular to the balance beam 26 to level the main beam 1. Specifically, the leveling system located on the same side of the width direction of the main beam 1 can achieve lateral leveling of the lower crossbeam 25 and the main beam 1 by extending or retracting the first telescopic support leg assembly; the leveling systems located on both sides of the same lower crossbeam 25 can achieve longitudinal leveling of the main beam 1, i.e., leveling along the length direction of the main beam 1, by extending or retracting the first telescopic support leg assembly.

[0086] The main support leg 3 includes two side support frames, which are respectively disposed on both sides of the main beam 1 along the width direction. Both side support frames are connected to the main beam 1. The side support frames are rotatably disposed, and the rotation axis of the side support frames is perpendicular to the main beam 1. The side support frames can rotate around the rotation axis to move closer to or away from the main beam 1.

[0087] In this embodiment, the main support leg 3 has a folding function, and the auxiliary support leg 2 has a rotating folding function. After folding, see... Figure 5 As shown, the clearance of the main support leg 3 meets the clearance requirements for railway transportation. The two auxiliary support legs 2 are supported on two transport trolleys 6, thus enabling transportation on the railway.

[0088] Under transport conditions, the clearance of the girder replacement equipment is within the railway transport clearance, allowing it to travel on the railway without restriction. Under girder erection conditions, the main support leg 3 is supported at the end of the adjacent span of the bridge, making the force transmission and distribution more reasonable and safe.

[0089] See Figure 4 and Figure 5 As shown, the main support leg 3 includes an upper connecting beam 31, which is connected to the main beam 1 and extends out of both sides of the main beam 1 along its width. Two side support frames are rotatably connected to both ends of the upper connecting beam 31. The main support leg 3 also includes a lower connecting beam 33, with two side support frames rotatably connected to both ends of the lower connecting beam 33. A second telescopic support leg assembly 34 is provided on the lower connecting beam 33.

[0090] After the main beam 1 is lifted, during the extension of the main support leg 3, the second telescopic support leg assembly 34 extends and supports the support surface. The second telescopic support leg assembly 34 may include a leveling cylinder 28 and a support screw 29. Both the leveling cylinder 28 and the support screw 29 are connected to the balance beam 26. Both the leveling cylinder 28 and the support screw 29 can extend and retract in a direction perpendicular to the balance beam 26 to stably support the main beam 1.

[0091] Example 2

[0092] See Figures 18 to 23 As shown in Embodiment 2 of this application, the lifting trolley 5 of the beam-changing equipment is described in detail. The lifting trolley 5 includes: a hanging frame 51, a hoisting mechanism 52, and a lifting device 53. The hanging frame 51 is used to movably connect to the main beam 1 of the beam-changing equipment. The hanging frame 51 includes a beam connecting frame 511 and two beams 512, which are spaced apart. Each beam 512 has a top surface and a side surface connected to the top surface. The beam connecting frame 511 connects to the top surfaces of the two beams respectively. A sliding table 5121 is provided on the side surface. The hoisting mechanism 52 includes a fixed pulley assembly 521 and a movable pulley assembly 522 connected to the fixed pulley assembly 521. The fixed pulley assembly 521 is disposed between the two beams and is slidably connected to the sliding table 5121. The lifting device is connected to the movable pulley assembly 522.

[0093] In this embodiment, the fixed pulley assembly 521 is not slidably supported on the top surface of the beam, but rather recessed inside the hanger 51. A slide table 5121 is provided on the side surface of the beam, and the movable pulley is slidably supported on the slide table 5121. This avoids the beam frame 511 obstructing the fixed pulley assembly 521, thus significantly increasing the lateral movement space of the fixed pulley assembly 521 within the limited external dimensions, meeting the requirements for curved beam erection. Specifically, the slide table 5121 can be provided on the inner side surfaces of the two beams, i.e., on two opposing surfaces, allowing the fixed pulley assembly 521 to slidably support itself on the slide table 5121.

[0094] The crane trolley 5 also includes a drive system, a winch 523, a guide pulley 56, a traveling system 57, and an electro-hydraulic control box 55, etc. One end of the hoisting rope is wound around the winch 523, and after passing through the guide pulley 56, it extends to the fixed pulley assembly 521 and the movable pulley assembly 522. The winch 523 winds or releases the hoisting rope to cause the movable pulley assembly 522 to move up and down. The traveling system 57 can be mounted on the bracket 51 and has rollers that can be supported on corresponding parts of the main beam. The drive system may include a longitudinal traveling motor 58 and a drive gear 59. The longitudinal traveling motor 58 and the drive gear 59 are connected, and the drive gear 59 meshes with a rack on the main beam. The longitudinal traveling motor 58 drives the drive gear 59 to rotate, thereby driving the crane trolley 5 to travel along the main beam. The electro-hydraulic control box 55 is used to provide hydraulic and electrical energy to the various cylinders and motors.

[0095] In one possible implementation, the slide 5121 has an upper platform that is lower than the top surface of the beam and intersects with the side surface of the beam. The fixed pulley assembly 521 has a first housing that is located between the side surfaces of the two beams and is slidably supported on the upper platforms of the two beams on both sides.

[0096] The connecting beam frame 511 includes two upright beams 5111, which are respectively connected to the top surfaces of two beams. Along the extension direction of the beams, the slide table 5121 extends from one side of the upright beams 5111 to the other side or near the other side of the upright beams 5111. The upright beams 5111 are connected to the top surfaces and do not interfere with the housing of the fixed pulley assembly 521 connected to the slide table 5121. The fixed pulley assembly 521 can move to the inner side of the upright beams 5111 or even pass through the upright beams 5111, significantly increasing the lateral movement.

[0097] In one possible implementation, a connecting beam (not shown) connects the two beams, and the slide 5121 extends to the connecting beam. The connecting beam connects the two beams, enhancing the structural strength of the hanger 51. The end of the slide 5121 extends to the connecting beam, providing maximum lateral movement space for a given pulley assembly 521.

[0098] The crane trolley 5 includes a telescopic device c, one end of which is hinged to the connecting beam frame 511, and the other end of which is hinged to the fixed pulley assembly 521. The telescopic device c extends and retracts, driving the fixed pulley assembly 521 to translate along the beam.

[0099] The telescopic device c can be a telescopic hydraulic cylinder or an electric push rod. The connecting beam frame 511 can include two vertical beams 5111 and a crossbeam 5112 connecting the two vertical beams 5111. One end of the telescopic device c can be hinged to the crossbeam, and the other end of the telescopic device c is hinged to the housing of the fixed pulley assembly 521.

[0100] The crane trolley 5 may include two connecting beams 511 and two fixed pulley assemblies 521, which move synchronously along the beam under the drive of their respective telescopic devices c.

[0101] In one possible implementation, a first lug 533 is provided on the lifting device 53, and a second lug 5221 is provided on the movable pulley assembly 522. The first lug 533 and the second lug 5221 are detachably connected by a pin a. In this embodiment, the movable pulley assembly of the lifting trolley 5 is designed to be separate from the lifting device, and a quick-release structure using pin a is adopted.

[0102] A lifting rope is provided between the movable pulley assembly and the fixed pulley assembly. The lifting rope can be a multi-ratio steel wire rope group. The movable pulley assembly 522 and the lifting device have a quick-release structure design and are equipped with a pin.

[0103] The lifting trolley 5 includes a sling 54, and the lifting device 53 includes a lifting device body 531 and a tensioning beam 532. The lifting device body 531 is connected to the movable pulley assembly 522, and the sling 54 is connected to the tensioning beam 532. A clamping space is formed between the sling 54 and the lifting device body 531. The tensioning beam 532 is connected to the lifting device body 531 and can move relative to the lifting device body 531 to change its position, thereby adjusting the size of the clamping space. By setting an adjustable clamping space between the sling 54 and the lifting beam body, the sling 54 is ensured to be in a taut state, solving the problem of lifting loss caused by the sling 54 not being taut.

[0104] The tensioning beam 532 has a through groove, through which the end of the sling 54 can pass. The sling 54 can be connected to the tensioning beam 532 via a sling 54 pin. The end of the sling 54 has a slot through which the sling 54 pin can pass. The tensioning beam 532 is located on the upper surface of the lifting device body 531.

[0105] The lifting device body 531 has a guide shaft 5311, and the tensioning beam 532 has a guide hole. The tensioning beam 532 is sleeved on the guide shaft 5311 through the wire hole. The tensioning beam 532 can translate along the guide shaft 5311 to increase or decrease the distance between itself and the lifting device body 531.

[0106] The tensioning beam 532 has a through threaded groove, and a screw is threaded into the threaded groove and abuts against the lifting device body 531. Rotating the screw can adjust the distance between the lifting device body 531 and the tensioning beam 532. The screw facilitates raising or lowering the tensioning beam 532 to adjust the tension of the sling 54.

[0107] The lifting trolley 5 also includes a shim, which is located between the lifting body 531 and the tensioning beam 532. The guide post has an external thread, and a nut is threaded to one end of the guide post that extends out of the threaded groove. The nut is tightened against the tensioning beam 532.

[0108] The operation process for replacing beams using this lifting trolley 5 is as follows:

[0109] Step S100: Preset the lifting device on the simply supported beam b to be replaced.

[0110] Step S200: Tension the lifting device 53 and the sling 54 by turning the screw, which will lift the tensioning beam 532 upward until the sling 54 is taut. Then, insert a shim between the tensioning beam 532 and the lifting device body 531 to maintain a fixed distance between them. Finally, screw a nut on the external thread of the guide post to tighten and fix the tensioning beam 532 and the lifting device body 531.

[0111] Step S300: After the beam replacement equipment arrives at the beam replacement bridge position, the lifting trolley 5 lowers the movable pulley assembly 522, connects the movable pulley assembly 522 and the lifting device, and the winch 523 runs to lift the simply supported beam b.

[0112] Example 3

[0113] Embodiment 3 of this application provides an operation method for the beam replacement equipment described in the above embodiments. The beam replacement equipment includes a main beam 1, two auxiliary legs 2, and two main legs 3. The two auxiliary legs 2 are respectively disposed at both ends of the main beam 1, and the auxiliary legs 2 can extend and retract along a direction perpendicular to the length of the main beam 1. The two main legs 3 are respectively disposed at both ends of the main beam 1, and the main legs 3 can extend and retract along a direction perpendicular to the main beam 1. The operation method includes:

[0114] Control the two auxiliary outriggers 2 to extend and lift the main beam 1 to the target height, control the two main outriggers 3 to extend and support the main beam 1, and control the movable crane trolley 5 on the main beam 1 to perform the beam replacement action.

[0115] This application provides an auxiliary support leg 2 for lifting the main beam 1. During the beam replacement operation, the main beam 1 is first lifted by the auxiliary support leg 2. After the main beam 1 is lifted, the main support leg 3 is controlled to support the main beam 1. This avoids the wear problem of the existing L-shaped frame type main support leg 3 during lifting and improves the reliability of the beam replacement equipment.

[0116] The beam replacement equipment includes two transport trolleys 6, and the two auxiliary support legs 2 are respectively connected to the corresponding transport trolleys 6. The main beam 1 is supported by the transport trolleys 6 and moved to the beam replacement hole position.

[0117] The auxiliary support leg 2 has an upper core plate, and the transport trolley 6 is equipped with a lower core plate. During the process of transporting the main beam 1 by the transport trolley 6, the auxiliary support leg 2 is controlled to be in a retracted state, and the upper core plate of the auxiliary support leg 2 is supported by the lower core plate on the transport trolley 6.

[0118] The auxiliary support leg 2 has a first leveling foot. Before the auxiliary support leg 2 extends to lift the main beam 1, the first leveling foot is controlled to extend and support the main beam 1 on the support surface to level the main beam 1. During the movement of the beam changing equipment and the extension of the auxiliary support leg 2 to lift the main beam 1, the main support leg 3 is in a retracted state, and there is a gap between the main support leg 3 and the support surface. After the auxiliary support leg 2 lifts the main beam 1 to the target height, the main support leg 3 is controlled to extend to support the support surface, and the auxiliary support leg 2 is controlled to detach from the support surface.

[0119] After the main support leg 3 is supported on the support surface, the auxiliary support leg 2 is controlled to retract and fold, so that the auxiliary support leg 2 is parallel to the main beam 1, so as to avoid the movable lifting trolley 5 on the main beam 1.

[0120] The auxiliary support leg 2 includes an upper crossbeam and two first multi-stage telescopic arms 22. The upper crossbeam is vertically connected to the main beam 1, and the two first multi-stage telescopic arms 22 are located at opposite ends of the upper crossbeam. During the movement of the beam-changing equipment and the lifting of the main beam 1 by the auxiliary support leg 2, the first multi-stage telescopic arms 22 are connected to the upper crossbeam via two pins a, and their positions are fixed. After the main support leg 3 extends to support the support surface, one of the pins a is pulled out, and the auxiliary support leg 2 is rotated so that it is parallel to the main beam 1.

[0121] The main support leg 3 has two side support frames, which are respectively disposed on both sides of the main beam 1 along the width direction. These side support frames are rotatable. During the movement of the beam-changing equipment and the lifting of the main beam 1 by the auxiliary support leg 2, the side support frames are controlled to rotate closer to the main beam 1, reducing the width of the beam-changing equipment. The clearance of the main support leg 3 meets the railway transport clearance requirements. Before the main support leg 3 extends, the side support frames are controlled to rotate to an extended state away from the main beam 1.

[0122] After the beam replacement operation is completed, the auxiliary support leg 2 is extended to support the support surface, the main support leg 3 is retracted to detach from the support surface, and the auxiliary support leg 2 is retracted, so that the auxiliary support leg 2 only supports the transport trolley 6. The transport trolley 6 then moves the main beam 1 away from the current beam replacement position. If the current beam replacement position is the last one, the transport trolley 6 moves away from the bridge. If there are other beam replacement positions, after the transport trolley 6 leaves the current beam replacement position, it moves to the next beam replacement position and performs the operation method as described in claim 1.

[0123] A second leveling leg is provided on the main support leg 3. During the extension of the main support leg 3, the second leveling leg extends to support the support surface.

[0124] The following provides the operating procedure for the beam replacement equipment of this application, including the following steps:

[0125] Step S1, see Figure 7 and Figure 8 As shown, the main beam 1 is supported by a pair of transport trolleys 6 and moved to the beam replacement hole. The two auxiliary legs 2 on the main beam 1 are supported by the transport trolleys 6, and the two main legs 3 connected to the main beam 1 are in a retracted state.

[0126] Step S2, see Figure 3 and Figure 9 As shown, the auxiliary outrigger 2 is extended to lift the main beam 1 to the target height;

[0127] Step S3, see Figure 10 As shown, the main support leg 3 is extended to support the support surface; for example, the main support leg 3 can support the end of the bridge span to be replaced, thereby ensuring the safety of the bridge span when replacing the beam.

[0128] Step S4, see Figure 11 and Figure 12 As shown, the auxiliary support leg 2 is controlled to retract and fold parallel to the main beam 1. (See attached image) Figure 2 As shown, the crane trolley 5 on the main beam 1 is controlled to perform the beam replacement action;

[0129] Step S5: Beam replacement operation completed;

[0130] Step S6: Control the auxiliary support leg 2 to rotate until it is perpendicular to the main beam 1;

[0131] Step S7: Control the extension of the auxiliary support leg 2 to support the support surface;

[0132] Step S8: Main support leg 3 retracts to detach from the support surface;

[0133] Step S9: Auxiliary support leg 2 retracts, and auxiliary support leg 2 only supports the transport trolley 6;

[0134] Step S10: Support the main beam 1 with a pair of transport trolleys 6 and move it to another beam replacement hole.

[0135] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., 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 this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0136] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0137] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0138] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0139] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0140] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A beam-changing device, characterized in that, include: Main beam; Two auxiliary support legs are respectively located at both ends of the main beam, and the auxiliary support legs can extend and retract along the length direction perpendicular to the main beam; Two transport trolleys, and the two auxiliary outriggers can be supported on the two transport trolleys respectively; Two main support legs are respectively disposed at both ends of the main beam, and the main support legs can extend and retract in a direction perpendicular to the main beam; The beam-changing equipment has a transportation mode and a beam-erection mode. In the transportation mode, the auxiliary support leg is supported on the transportation trolley and the main support leg is detached from the support surface. In the beam-erection mode, the main support leg is supported on the support surface and the auxiliary support leg is detached from the support surface. The auxiliary outrigger has a first multi-stage telescopic arm, and the main outrigger has a second multi-stage telescopic arm; The vertical distance between the fulcrum of the auxiliary outrigger and the first multi-stage telescopic arm is less than the vertical distance between the fulcrum of the main outrigger and the second multi-stage telescopic arm.

2. The beam-changing equipment according to claim 1, characterized in that, The main support leg is located between the two auxiliary support legs along the length of the main beam.

3. The beam-changing equipment according to claim 1, characterized in that, The auxiliary support leg is rotatably connected to the main beam; A lifting trolley is movably mounted on the main beam; During the beam erection process, the auxiliary outriggers are rotated to be parallel to the main beam to avoid the lifting trolley.

4. The beam-changing equipment according to claim 3, characterized in that, The auxiliary outrigger includes: An upper crossbeam is vertically connected to the main beam; Two first multi-stage telescopic arms are located at both ends of the upper crossbeam along its length, and the first multi-stage telescopic arms are connected to the upper crossbeam by at least two pins. A telescopic component, which is connected to the upper crossbeam or main beam, and is drively connected to the first multi-stage telescopic arm; Under the beam erection condition, only one of the pins connects the upper crossbeam and the first multi-stage telescopic arm. The extension or shortening of the telescopic component causes the first multi-stage telescopic arm to flip to be parallel to the main beam.

5. The beam-changing equipment according to claim 1, characterized in that, The auxiliary support leg has an upper core plate, and the transport trolley is equipped with a lower core plate; Under the aforementioned transportation conditions, the auxiliary support leg is perpendicular to the main beam, and the upper core plate is connected to the lower core plate; During the beam erection process, the upper core plate detaches from the lower core plate, and the auxiliary support leg flips to be parallel to the main beam.

6. The beam-changing equipment according to claim 1, characterized in that, The auxiliary outrigger has a leveling system, which includes a first telescopic outrigger assembly.

7. The beam-changing equipment according to claim 1, characterized in that, The main support leg includes two side support frames; The two side support frames are respectively disposed on both sides of the main beam along the width direction, and both side support frames are connected to the main beam; The side support frame is rotatably mounted, and the axis of rotation of the side support frame is perpendicular to the main beam. The side support frame can rotate around the axis of rotation to move closer to or further away from the main beam.

8. The beam-changing equipment according to claim 7, characterized in that, The main support leg includes an upper connecting beam, which is connected to the main beam and extends out of both sides of the main beam along the width direction; Both of the side support frames are rotatably connected to both ends of the upper connecting beam.

9. The beam-changing equipment according to claim 7, characterized in that, The main support leg also includes a lower connecting beam; The two side support frames are rotatably connected to both ends of the lower connecting beam; A second telescopic outrigger assembly is installed on the lower connecting beam.

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