A crane trolley and beam changing device

Abstract

The embodiment of the present application provides a lifting trolley and a beam changing device, the lifting trolley comprising a hanger, a hoisting mechanism and a lifting appliance. The hanger is used to be movably connected to a main beam of the beam changing device, the hanger comprises a connecting beam frame and two beam bodies, the two beam bodies are arranged at intervals, the beam body has a top surface and a side surface connected to the top surface, the connecting beam frame is connected to the top surface of the two beam bodies respectively, and a sliding table is arranged on the side surface. The hoisting mechanism comprises a fixed pulley assembly and a movable pulley assembly connected to the fixed pulley assembly, the fixed pulley assembly is arranged between the two beam bodies, and the fixed pulley assembly is slidably connected to the sliding table. The lifting appliance is connected to the movable pulley assembly. In the present application, the sliding table is arranged on the side surface of the beam body, the connecting beam frame avoids blocking the fixed pulley assembly, the transverse space of the fixed pulley assembly is sufficiently increased under the condition of limited external dimensions, and the requirement of curve beam erection can be met.

Description

Technical Field

[0001] This application relates to the field of bridge beam replacement technology, and in particular to a lifting trolley and beam replacement equipment. Background Technology

[0002] With the rapid development of transportation in my country, the load capacity and speed of trains running on railways and cars running on highways have increased, and the operating time of railways and highways has lengthened, making the aging problem of bridges on existing lines increasingly prominent. A large number of existing railways have bridges in service with defects, especially in recent years due to the need for train speed increases and heavy-load upgrades. To meet the normal operation of railways and highways and solve the problems of increased load capacity and limitations on train speed, it is necessary to replace bridges on existing lines. Railway bridge replacement construction equipment commonly uses bridge replacement equipment, which includes outriggers, a main beam mounted on the outriggers, and a crane mounted on the main beam for suspending the simply supported railway bridge beams. The overall dimensions of the bridge replacement equipment must meet both railway clearance requirements and bridge replacement construction requirements. Furthermore, in railway bridge bridge replacement construction, the crane trolley hook must be simple and efficient, and the crane trolley must have lateral movement capabilities to meet the needs of bridge replacement on curves. Railway clearance refers to the outline dimensions of structures, equipment, and locomotives that cannot be crossed on the railway line to ensure transportation safety. While the existing crane trolley dimensions meet railway clearance requirements, the lateral movement often falls short of the needs for curved bridge erection. Crane trolleys typically include a hanger and a lifting mechanism. The hanger has a connecting beam and two beams, with the connecting beam connected to the top surface of the two beams. The lifting mechanism can also be slidably connected to the top surface of the beams. As a result, the connecting beam will obstruct the lifting mechanism from moving along the beams, causing the lateral movement of the lifting mechanism to be too small and failing to meet the requirements for curved bridge erection.

[0003] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may contain information that is not part of the prior art known to those skilled in the art. Summary of the Invention

[0004] This application provides a lifting trolley and beam-changing device to solve the problem that the lateral movement of the lifting trolley is too small under limited external dimensions, which fails to meet the requirements of curved beam erection.

[0005] This application provides the following technical solution:

[0006] The primary objective of this application is to provide a lifting trolley, comprising:

[0007] A bracket for movably connecting to the main beam of a beam-changing device. The bracket includes a beam-connecting frame and two beams spaced apart. Each beam has a top surface and a side surface connecting to the top surface. The beam-connecting frame connects to the top surfaces of the two beams respectively. A sliding table is provided on the side surface.

[0008] The hoisting mechanism includes a fixed pulley assembly and a movable pulley assembly connected to the fixed pulley assembly. The fixed pulley assembly is disposed between the two beams and is slidably connected to the slide table.

[0009] A lifting device, which is connected to the movable pulley assembly.

[0010] Optionally, the slide has an upper platform, which is positioned lower than the top surface of the beam.

[0011] The upper platform surface intersects with the side surface of the beam.

[0012] The fixed pulley assembly has a first housing, which is located between the side faces of the two beams, and the two sides of the first housing are slidably supported on the upper surfaces of the slides of the two beams.

[0013] Optionally, the connecting beam frame includes two vertical beams, which are respectively connected to the top surfaces of the two beam bodies;

[0014] Along the extension direction of the beam, the slide extends from one side of the upright beam to the other side of the upright beam or close to the other side of the upright beam.

[0015] Optionally, a connecting beam connects the two beams, and the slide extends to the connecting beam.

[0016] Optionally, the crane trolley includes a telescopic device, one end of which is hinged to the connecting beam frame, and the other end of which is hinged to the fixed pulley assembly.

[0017] Optionally, the lifting device is provided with a first lug, and the movable pulley assembly is provided with a second lug;

[0018] The first ear and the second ear are detachably connected by a pin.

[0019] Optional, the lifting trolley includes slings;

[0020] The lifting device includes a lifting device body and a tensioning beam;

[0021] The lifting device body is connected to the movable pulley assembly, the lifting strap is connected to the tensioning beam, and a clamping space is formed between the lifting strap and the lifting device body;

[0022] The tensioning beam is connected to the main body of the lifting device, and the tensioning beam can move and change position relative to the main body of the lifting device to adjust the size of the clamping space.

[0023] Optionally, the lifting device body has a guide shaft;

[0024] The tensioning beam has a guide hole, and the tensioning beam is sleeved on the guide shaft through the guide hole;

[0025] The tensioning beam can translate along the guide axis, increasing or decreasing the distance between it and the main body of the lifting device.

[0026] Optionally, the tensioning beam has a through threaded groove;

[0027] The screw is threaded into the threaded groove and abuts against the main body of the lifting device. Rotating the screw can adjust the distance between the main body of the lifting device and the tensioning beam.

[0028] Optionally, the lifting trolley also includes a shim located between the lifting device body and the tensioning beam;

[0029] The guide shaft has an external thread, and a nut is threadedly connected to one end of the guide shaft that extends out of the threaded groove. The nut is tightened against the tensioning beam.

[0030] The second objective of this application is to provide a beam replacement device, comprising:

[0031] Main beam;

[0032] A crane trolley, the trolley's mounting bracket being movably connected to the main beam.

[0033] The embodiments of this application, by adopting the above technical solutions, have the following technical effects:

[0034] In this application, a sliding platform is provided on the side surface of the beam, which avoids the beam connecting frame from blocking the fixed pulley assembly. This allows for a significant increase in the lateral movement space of the fixed pulley assembly within the limited external dimensions, thus meeting the requirements for curved beam erection. Attached Figure Description

[0035] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0036] Figure 1 A schematic diagram of the beam-changing equipment provided in the embodiments of this application under transportation conditions;

[0037] Figure 2 A schematic diagram illustrating the beam replacement operation performed by the beam replacement equipment provided in this application embodiment;

[0038] Figure 3 A diagram showing the state of the beam-changing equipment lifting the main beam provided in an embodiment of this application;

[0039] Figure 4A sectional view of the main support leg of the beam-changing device provided in an embodiment of this application;

[0040] Figure 5 A schematic diagram showing the main support leg of the beam-changing device provided in this application embodiment in a folded state;

[0041] Figure 6 This is a sectional view of the auxiliary support leg of the beam-changing device provided in an embodiment of this application;

[0042] Figure 7 A diagram showing the auxiliary outriggers of the beam replacement equipment provided in this embodiment of the application supporting the bridge deck.

[0043] Figure 8 for Figure 7 A magnified view of a portion of the image;

[0044] Figure 9 This is a diagram showing the auxiliary outriggers of the beam-changing equipment provided in this application being raised to a high position.

[0045] Figure 10 A diagram showing the main support leg of the beam-changing device provided in this embodiment of the application in its proper position.

[0046] Figure 11 A schematic diagram showing the auxiliary support leg of the beam-changing equipment provided in this application embodiment in a retracted state;

[0047] Figure 12 This is a diagram showing the state of the auxiliary support leg of the beam-changing equipment provided in this application embodiment after it has been folded up.

[0048] Figure 13 A three-dimensional structural diagram of the auxiliary support leg of the beam-changing equipment provided in the embodiments of this application;

[0049] Figure 14 A diagram showing the state of the leveling system of the beam-changing equipment provided in this application embodiment supported on the support surface;

[0050] Figure 15 A diagram showing the state in which the telescopic arm at the head end of the beam-changing device provided in this embodiment of the application is lifted;

[0051] Figure 16 A diagram showing the state of the middle telescopic arm of the beam-changing device provided in this application embodiment being lifted;

[0052] Figure 17 A schematic diagram showing the auxiliary support leg of the beam-changing equipment provided in this application embodiment in a folded state;

[0053] Figure 18 A three-dimensional structural schematic diagram of the lifting trolley of the beam-changing equipment provided in the embodiments of this application;

[0054] Figure 19This is a front view of the lifting trolley of the beam-changing equipment provided in an embodiment of this application;

[0055] Figure 20 A partial structural diagram of the lifting trolley of the beam-changing equipment provided in the embodiments of this application;

[0056] Figure 21 A top view of the lifting trolley of the beam-changing equipment provided in an embodiment of this application;

[0057] Figure 22 A schematic diagram of the cooperation structure between the lifting trolley and the lifting rope of the beam-changing equipment provided in the embodiments of this application;

[0058] Figure 23 This is a structural diagram showing the connection between the lifting rope of the hoisting trolley and the simply supported beam of the beam-changing equipment provided in this application embodiment.

[0059] Figure label:

[0060] 1. Main beam; 2. Auxiliary outriggers; 21. Upper crossbeam; 22. First multi-stage telescopic boom; 221. Telescopic boom; 221a. Guide sleeve; 221b. Connecting beam; 23. Telescopic component; 24. Lifting component; 25. Lower crossbeam; 26. Balance beam; 27. Rotating hinge; 28. Leveling cylinder; 29. ​​Support screw; 3. Main outrigger; 31. Upper connecting beam; 32. Second multi-stage telescopic boom; 33. Lower connecting beam; 34. Second telescopic outrigger assembly; 5. Lifting trolley; 51. Hanger; 511. Connecting beam frame; 5111. Vertical beam; 5112 512. Beam body; 5121. Slide table; 52. Lifting mechanism; 521. Fixed pulley assembly; 522. Moving pulley assembly; 5221. Second lug; 523. Winch; 53. Lifting device; 531. Lifting device body; 5311. Guide shaft; 532. Tensioning beam; 533. First lug; 54. Lifting strap; 55. Electro-hydraulic control box; 56. Guide pulley; 57. Traveling system; 58. Longitudinal traveling motor; 59. Drive gear; 6. Transport trolley; a. Pin shaft; b. Simply supported beam body; c. Telescopic device. Detailed Implementation

[0061] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] Example 1

[0066] See Figures 18 to 23 As shown, Embodiment 1 of this application provides a lifting trolley 5, which can be mounted on the main beam 1 of a beam-changing device and can translate along the main beam 1. The lifting trolley 5 includes: a bracket 51, a hoisting mechanism 52, and a lifting device 53. The bracket 51 is used to movably connect to the main beam 1 of the beam-changing device. The bracket 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 the top surfaces of the two beams 512 respectively, and 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 512 and is slidably connected to the sliding table 5121. The lifting device 53 is connected to the movable pulley assembly 522.

[0067] In this embodiment, the fixed pulley assembly 521 is not slidably supported on the top surface of the beam 512, but rather recessed inside the bracket 51. A slide table 5121 is provided on the side surface of the beam 512, and the fixed pulley assembly 521 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 512, i.e., on two opposing surfaces, allowing the fixed pulley assembly 521 to be slidably supported on the slide table 5121.

[0068] 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 1. 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 1. The longitudinal traveling motor 58 drives the drive gear 59 to rotate, thereby driving the crane trolley 5 to travel along the main beam 1. The electro-hydraulic control box 55 is used to provide hydraulic and electrical energy to the various cylinders and motors.

[0069] In one possible implementation, the slide 5121 has an upper surface that is lower than the top surface of the beam 512 and intersects with the side surface of the beam 512. The fixed pulley assembly 521 has a first housing that is located between the side surfaces of the two beams 512 and the two sides of the first housing are slidably supported on the upper surface of the slide 5121 of the two beams 512.

[0070] The connecting beam frame 511 includes two vertical beams 5111, which are respectively connected to the top surfaces of two beam bodies 512. Along the extending direction of the beam body 512, the slide table 5121 extends from one side of the vertical beam 5111 to the other side of the vertical beam 5111 or close to the other side of the vertical beam 5111. The vertical 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 position of the vertical beam 5111 or even pass through the vertical beam 5111, significantly increasing the lateral movement.

[0071] In one possible implementation, a connecting beam (not shown) connects the two beams 512, and the slide 5121 extends to the connecting beam. The connecting beam connects the two beams 512, 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.

[0072] 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 movement of the telescopic device c drives the fixed pulley assembly 521 to translate along the beam 512.

[0073] 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.

[0074] The crane trolley 5 may include two connecting beams 511 and two movable pulley assemblies 522. The two fixed pulley assemblies 521 move synchronously along the beam 512 under the drive of the corresponding telescopic devices c.

[0075] 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 of the lifting trolley 5 is designed to be separate from the lifting device, and a quick-release structure using pin a is adopted.

[0076] The movable pulley assembly and the fixed pulley assembly are equipped with lifting ropes, which can be multi-ratio steel wire rope groups. The movable pulley assembly 522 and the lifting device 53 are designed with a quick-release structure and are equipped with a pin a.

[0077] 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.

[0078] 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.

[0079] 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 guide 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.

[0080] 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.

[0081] The lifting trolley 5 also includes a shim, which is located between the lifting body 531 and the tensioning beam 532. The guide shaft has an external thread, and a nut is threaded to one end of the guide shaft that extends out of the threaded groove. The nut is tightened against the tensioning beam 532.

[0082] The operation process for replacing beams using this lifting trolley 5 is as follows:

[0083] Step S100: Preset the lifting device 53 on the simply supported beam b to be replaced.

[0084] 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 shaft to tighten and fix the tensioning beam 532 and the lifting device body 531.

[0085] 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 53, and the winch 523 runs to lift the simply supported beam b.

[0086] Example 2

[0087] See Figures 1 to 23As shown, Embodiment 2 of this application provides a beam-changing device, including: a main beam 1, two auxiliary legs 2, two transport trolleys 6, two main legs 3, and the lifting trolley 5 described in Embodiment 1 above. 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 auxiliary legs 2 can be respectively supported by the two transport trolleys 6. 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 beam-changing device has a transport mode and a beam-erection mode. In the transport mode, the auxiliary legs 2 are supported by the transport trolleys 6, and the main legs 3 are detached from the support surface. In the beam-erection mode, the main legs 3 are supported by the support surface, and the auxiliary legs 2 are detached from the support surface.

[0088] The main support leg 3 is used to support both ends of the bridge span to be replaced during the beam replacement construction process, serving as the main load-bearing support leg to ensure the safety of the bridge span during beam replacement. The auxiliary support leg 2 is supported on a transport trolley, carrying the equipment for transport on the railway.

[0089] 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 during lifting.

[0090] Example 3

[0091] Embodiment 3 of this application provides a detailed description of the structure of the auxiliary support leg 2 of the beam-changing equipment. The auxiliary support leg 2 has a first multi-stage telescopic arm 22, and the main support leg 3 has a second multi-stage telescopic arm 32. The vertical distance between the fulcrum of the auxiliary support leg 2 and the first multi-stage telescopic arm 22 is less than the vertical distance between the fulcrum of the main support leg 3 and the second multi-stage telescopic arm 32.

[0092] A fulcrum refers to the part of the auxiliary outrigger 2 or the main outrigger 3 that is supported on a supporting surface, which can be the bridge deck. In this embodiment, by designing the vertical distance between the fulcrum of the auxiliary outrigger 2 and the first multi-stage telescopic arm 22 to be smaller than the vertical distance between the fulcrum of the main outrigger 3 and the second multi-stage telescopic arm 32, the vertical portion of the auxiliary outrigger 2 is more likely to withstand a larger bending moment than the main outrigger 3, and is less prone to wear on the vertical structure, thereby protecting the main outrigger 3 and extending the service life of the equipment.

[0093] In one possible implementation, see Figure 1 As shown, the main support leg 3 is located between the two auxiliary support legs 2. 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.

[0094] In one possible implementation, see Figure 1 and Figure 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.

[0095] 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.

[0096] 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 21 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 21 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 21 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.

[0097] In one possible implementation, two first connecting ears are 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 21 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 21 by pin a, and at least one of the pins a is detachable.

[0098] In the supported state, the auxiliary support leg 2 is connected to the upper crossbeam 21 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 21. 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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, 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] The leveling system 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 outrigger 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.

[0108] Example 4

[0109] Embodiment 4 of this application provides a detailed description of the main support leg of the beam-changing device. 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, and 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 frame is perpendicular to the main beam 1. The side frame can rotate around the rotation axis to move closer to or further away from the main beam 1.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] Example 5

[0115] Embodiment 5 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:

[0116] 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.

[0117] 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 then controlled to support the main beam 1. This avoids the wear problem of the existing L-shaped frame type main support leg lifting and improves the reliability of the beam replacement equipment.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] The auxiliary support leg 2 includes an upper crossbeam 21 and two first multi-stage telescopic arms 22. The upper crossbeam 21 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 21. 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 21 via two pins a, and the positions of the first multi-stage telescopic arms 22 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 the auxiliary support leg 2 is parallel to the main beam 1.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] The following provides the operating procedure for the beam replacement equipment of this application, including the following steps:

[0127] 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.

[0128] 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;

[0129] 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.

[0130] 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;

[0131] Step S5: Beam replacement operation completed;

[0132] Step S6: Control the auxiliary support leg 2 to rotate until it is perpendicular to the main beam 1;

[0133] Step S7: Control the extension of the auxiliary support leg 2 to support the support surface;

[0134] Step S8: Main support leg 3 retracts to detach from the support surface;

[0135] Step S9: Auxiliary support leg 2 retracts, and auxiliary support leg 2 only supports the transport trolley 6;

[0136] Step S10: Support the main beam 1 with a pair of transport trolleys 6 and move it to another beam replacement hole.

[0137] 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.

[0138] 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.

[0139] 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 crane trolley, characterized in that, include: A bracket for movably connecting to the main beam of a beam-changing device. The bracket includes a beam-connecting frame and two beams spaced apart. Each beam has a top surface and a side surface connecting to the top surface. The beam-connecting frame connects to the top surfaces of the two beams respectively. A sliding table is provided on the side surface. The hoisting mechanism includes a fixed pulley assembly and a movable pulley assembly connected to the fixed pulley assembly. The fixed pulley assembly is disposed between the two beams and is slidably connected to the slide table. A lifting device, which is connected to the movable pulley assembly; The slide has an upper platform, which is lower than the top surface of the beam; the upper platform intersects with the side surface of the beam; the fixed pulley assembly has a first housing, which is located between the side surfaces of the two beams, and the two sides of the first housing are slidably supported on the upper platform of the slide of the two beams, thereby preventing the connecting beam frame from blocking the fixed pulley assembly.

2. The lifting trolley according to claim 1, characterized in that, The connecting beam frame includes two vertical beams, which are respectively connected to the top surfaces of the two beam bodies; Along the extension direction of the beam, the slide extends from one side of the upright beam to the other side of the upright beam or close to the other side of the upright beam.

3. The lifting trolley according to claim 1, characterized in that, A connecting beam connects the two beams, and the slide extends to the connecting beam.

4. The lifting trolley according to claim 1, characterized in that, It includes a telescopic device, one end of which is hinged to the connecting beam frame, and the other end of which is hinged to the fixed pulley assembly.

5. The lifting trolley according to claim 1, characterized in that, The lifting device is provided with a first lug, and the movable pulley assembly is provided with a second lug. The first ear and the second ear are detachably connected by a pin.

6. The lifting trolley according to claim 1, characterized in that, Including suspenders; The lifting device includes a lifting device body and a tensioning beam; The lifting device body is connected to the movable pulley assembly, the lifting strap is connected to the tensioning beam, and a clamping space is formed between the lifting strap and the lifting device body; The tensioning beam is connected to the main body of the lifting device, and the tensioning beam can move and change position relative to the main body of the lifting device to adjust the size of the clamping space.

7. The lifting trolley according to claim 6, characterized in that, The lifting device body has a guide shaft; The tensioning beam has a guide hole, and the tensioning beam is sleeved on the guide shaft through the guide hole; The tensioning beam can translate along the guide axis, increasing or decreasing the distance between it and the main body of the lifting device.

8. The lifting trolley according to claim 7, characterized in that, The tensioning beam has a through threaded groove; The screw is threaded into the threaded groove and abuts against the main body of the lifting device. Rotating the screw can adjust the distance between the main body of the lifting device and the tensioning beam.

9. The lifting trolley according to claim 8, characterized in that, It also includes a gasket located between the lifting device body and the tensioning beam; The guide shaft has an external thread, and a nut is threadedly connected to one end of the guide shaft that extends out of the threaded groove. The nut is tightened against the tensioning beam.

10. A beam-changing device, characterized in that, include: Main beam; The crane trolley as described in any one of claims 1-9, wherein the trolley's mounting bracket is movably connected to the main beam.

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