CN222454326U - A trolley frame for large-tonnage bridge cranes that can be used in a variety of scenarios - Google Patents

Abstract

The utility model provides a trolley frame of a large-tonnage bridge crane, which can be applied to various use scenes, and comprises a main winch drum mounting seat, a main speed reducer mounting seat, two fixed pulley block mounting seats and a balance wheel mounting seat; the connecting lines of the first installation position and the second installation position of the main winch winding drum, the main speed reducer and the main motor are perpendicular to the first main beam and the second main beam, the distances between the first installation position and the second installation position are equal, when the bridge crane is in a tunnel construction use scene, the main winch winding drum, the main speed reducer and the main motor are all located at the first installation position, and when the bridge crane is in a production use scene, the main winch winding drum, the main speed reducer and the main motor are all located at the second installation position. The trolley frame adopts ingenious structural design, so that the positions of the components on the large-tonnage bridge crane customized for tunnel inner construction can be applied to production requirements by slightly adjusting, and the equipment is fully utilized.

Description

Trolley frame applicable to large-tonnage bridge crane with various use scenes

Technical Field

The utility model relates to the technical field of building construction machinery in a tunnel, in particular to a trolley frame which can be used for hoisting large-tonnage and large-volume equipment such as a shield machine in the construction of a small space with low hoisting height in the tunnel, can also be used for hoisting a large hoisting height in production and can be applied to large-tonnage bridge cranes with various use scenes.

Background

Because the tunnel excavation cost of water resource allocation engineering is higher, the potential safety hazard is more, in order to reduce construction cost and potential safety hazard, the excavation size of tunnel can be designed as small as possible, the installation space of the shield machine can be designed to be smaller, the space between the enlarged installation space can increase more construction cost, and the potential safety hazard is brought. In some large-scale water resource allocation engineering construction, it is necessary to drill a tunnel in a mountain, and the tunnel cannot be drilled from the top of the mountain to the position of the tunnel to be drilled because the tunnel is located at a large distance from the top of the mountain. In order to shorten the construction period, the two ends of the tunnel are planned to be excavated simultaneously from the middle position of the tunnel, one branch 120 shown in fig. 2 needs to be excavated to the middle part of the tunnel planned to be excavated, then one shield machine installation room 110 is excavated at the middle position of the tunnel, then two shield machines with opposite propelling directions are installed in the installation room, and the two shield machines can excavate the tunnel in two opposite directions simultaneously, so that the construction efficiency is improved. The shield machine needs to be installed in the installation room 110, and tunneling operation is performed to both ends after the installation is completed. The ground width of the installation room of the shield machine is only 12 meters, the height from the dome to the ground is only 18.5 meters, the height from the track installation surface of the crane to the ground is 11 meters, and the weight of the cutter head of the heaviest installation unit of the shield machine exceeds 160 tons, and the diameter reaches 10 meters. In such narrow space, large-tonnage and large-scale components such as a shield tunneling machine cutterhead cannot be hoisted by using an automobile crane, a tower crane and the like, but only a large-tonnage bridge crane can be used for hoisting, and the existing bridge crane is mainly a standard component, as shown in the attached figure 1, a trolley frame adopts a main beam, the height of the main beam is large, the running space of a lifting hook is below the main beam of the trolley frame, when the lifting hook is positioned at the upper limit, the distance of a hanging point of the lifting hook below a track surface is greater than 1 meter, the lifting hook is a standard component, the length of the lifting hook capable of bearing 160 tons of weight is about 2 meters, so that the diameter of the shield tunneling machine cutterhead plus the distance from the hanging point of the lifting hook to the track is added, and the space required by lifting rope hoisting is added, and the height of the track installation surface of the crane from the ground is at least 13 meters. If the existing bridge crane is adopted in the engineering, the installation height is less than 9 meters, so that the hoisting requirement of the shield machine cannot be met. In addition, in the shield tunneling machine installation process, two trolleys with large lifting weights are required to be used for lifting, and in the lifting process, the lifting point distance of the two trolleys needs to be in a large change range due to the operation of overturning and the like.

Because one shield machine is installed in each of two directions of the tunnel, the positions of the two trolleys also need to be interchangeable.

In order to improve the equipment utilization rate, in such tunnel engineering construction, the large-tonnage bridge crane is used for hoisting large-scale components such as shield tunneling machine cutterheads with the weight of about 170 tons, and also needs small-scale components such as duct pieces with the weight of about 20 tons. And the pipe piece is hoisted to the shield machine, and then the shield machine is installed on the side face of the excavated tunnel. The section of jurisdiction is used for supporting the tunnel, keeps off the tiny grit in the mountain at the same time outside the tunnel.

The cost of customizing the large-tonnage bridge crane is very high, and if the large-tonnage bridge crane is only used for installing a shield machine in a tunnel, the resource waste is caused, and after the tunnel construction is completed, the large-tonnage bridge crane for construction needs to be converted into hoisting equipment for production. When the large-tonnage bridge crane is used as tunnel construction equipment, the large-tonnage bridge crane is limited by space arrangement, tunnel limit size and other aspects, so that the large-tonnage bridge crane is required to meet the use requirements of different use scenes such as shield machine accessory hoisting construction, duct piece hoisting and production hoisting in two directions of a tunnel, and structurally has to be provided with a flexible functional conversion design.

Disclosure of utility model

The present utility model provides a large tonnage bridge crane applicable to various use scenarios to solve at least one of the above problems.

According to one aspect of the present utility model, there is provided a trolley frame for a large-tonnage bridge crane applicable to various use scenarios, characterized by comprising two parallel first and second main beams, and first and second auxiliary beams respectively connecting the first and second main beams at both ends; the device also comprises a main winch drum mounting seat, a main speed reducer mounting seat, a main motor mounting seat, two fixed pulley block mounting seats and a balance wheel mounting seat; the main winch drum mounting seat is arranged on the first auxiliary beam and is close to the first main beam, the main speed reducer mounting seat is arranged on the second auxiliary beam, the main motor mounting seat is arranged on the second main beam and is close to the main speed reducer mounting seat, the main winch drum mounting seat is provided with a first main drum mounting position and a second main drum mounting position, the main speed reducer mounting seat is provided with a first speed reducer mounting position and a second speed reducer mounting position, the main motor mounting seat is provided with a first motor mounting position and a second motor mounting position, the connecting lines of the first mounting positions and the second mounting positions of the main winch drum, the main speed reducer and the main motor are perpendicular to the first main beam and the second main beam, the distances of the first mounting positions and the second mounting positions are equal, when the bridge crane is in a construction use scene of a bridge crane, the main winch drum, the main speed reducer and the main motor are all in the first mounting positions, one ends of the fixed pulley block mounting seat and the balance wheel mounting seat are arranged on the first main beam, the other ends of the fixed pulley block mounting seat are arranged on the second main beam, the fixed pulley block is perpendicular to the first main beam and the second main beam, when the main lifting hook is in the upper limit position, the connecting lines of the first main pulley block and the second main pulley block are perpendicular to the second main beam, and the main pulley block is in the first main crane production scene, and the main pulley is located between the main crane and the main drum is in the first main crane production scene The main speed reducer and the main motor are both positioned at a second installation position, one fixed pulley block installation seat is arranged on the first main beam, the other fixed pulley block installation seat is arranged on the second main beam, and the rotating shafts of the two fixed pulley blocks are parallel to the first main beam and the second main beam.

The trolley frame of the large-tonnage bridge crane applicable to various use scenes adopts ingenious structural design, so that the positions of the components on the large-tonnage bridge crane customized for tunnel inner construction can be applied to production requirements by slightly adjusting, and the equipment is fully utilized.

In some embodiments, the first guard board on the outer side of the first main beam is provided with a first through hole penetrating up and down.

In some embodiments, the utility model further comprises a supporting beam which is arranged in parallel with the first main beam, wherein the supporting beam is abutted against the second main beam, and a second through hole which penetrates up and down is arranged on the supporting beam.

In some embodiments, the utility model further comprises two bump guards symmetrically disposed about the centerline of the cart. Therefore, when the trolley is required to be installed by turning 180 degrees, the anti-collision device can still be used.

In some embodiments, the bridge crane comprises a lifting hook group, wherein rough guide plates are arranged on opposite sides of the first main beam and the second main beam, opposite sides of the rough guide plates on two sides are inclined planes, the distance between the upper ends of the opposite inclined planes is smaller than that between the lower ends of the opposite inclined planes, the distance between the upper ends of the opposite inclined planes is smaller than the largest dimension of the lifting hook group perpendicular to the directions of the first main beam and the second main beam, and the distance between the lower ends of the opposite inclined planes is larger than the largest dimension of the lifting hook group perpendicular to the directions of the first main beam and the second main beam.

In some embodiments, the rough guide plate comprises a rough guide web and a wing plate, wherein one side of the rough guide web is welded to the lower part of the opposite side of the first girder and the second girder, the other side of the rough guide web is an inclined plane, and the wing plate is arranged.

In some embodiments, a telescopic guardrail is arranged on one side, close to the first girder, of the second girder, and the telescopic guardrail is arranged so that the position of the telescopic guardrail can be switched between the second girder and the first girder.

In some embodiments, the telescopic guardrail is integrally L-shaped and comprises a handrail and a telescopic seat, wherein the telescopic seat comprises a bottom rod connected with the handrail and a base arranged on a second main beam, and the bottom rod is arranged in the base in a penetrating way and is connected with the base in a sliding way.

In some embodiments, the two ends of the first main beam and the second main beam are spliced with the two ends of the first auxiliary beam and the second auxiliary beam, and the upper surfaces of the first main beam and the second main beam are flush with the upper surfaces of the first auxiliary beam and the second auxiliary beam.

Drawings

FIG. 1 is a schematic diagram of a prior art bridge crane;

FIG. 2 is a schematic view of a use state of a large tonnage bridge crane applicable to various use scenarios according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a large tonnage bridge crane applicable to various usage scenarios according to one embodiment of the present utility model;

FIG. 4 is a schematic view of a partial structure of a large tonnage bridge crane applicable to various use scenarios according to one embodiment of the present utility model;

FIG. 5 is a schematic diagram of a structure of a main hook and a movable pulley block, a fixed pulley block and a balance wheel of a large-tonnage bridge crane applicable to various use scenes and winding of a steel wire rope according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the winding of the wire rope of the hoisting device of the bridge crane shown in FIG. 5 on the main hook group and the movable pulley block, the fixed pulley block and the balance wheel;

FIG. 7 is a schematic view of a top impact and guiding structure of a large tonnage bridge crane applicable to various use scenarios according to one embodiment of the present utility model;

FIG. 8 is a schematic view of the anti-collision roof and guide structure shown in FIG. 7;

FIG. 9 is a schematic view of the mounting structure of the guide plate shown in FIG. 8;

FIG. 10 is a schematic view of the fine guide and anti-impact roof structure shown in FIG. 8;

FIG. 11 is a schematic layout of the primary and secondary trolleys when the large tonnage bridge crane shown in FIG. 3 reversely hoists the shield machine;

FIG. 12 is a layout of a primary trolley and a secondary trolley of the use scenario of the large tonnage bridge crane lifting segment shown in FIG. 3;

FIG. 13 is a schematic view of the arrangement of a primary trolley and a secondary trolley of the large tonnage bridge crane shown in FIG. 3 when used as hoisting equipment in production;

Fig. 14-15 are schematic structural views of a main trolley of the large-tonnage crane of the present utility model when used as hoisting equipment in production;

Fig. 16 is a schematic view of the structure of the first and second mounting positions of the trolley frame of the main trolley of the large tonnage crane applicable to various use scenes of the present utility model.

FIG. 17 is a schematic diagram of a wire rope winding structure of a main hoisting mechanism when the large-tonnage crane of the utility model is used as hoisting equipment in production;

Fig. 18-20 are schematic frame structures of a main trolley of a large tonnage crane according to an embodiment of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

Finally, it is further noted that relational terms such as first and second, and the like, counter-clockwise and clockwise, forward and reverse, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," comprising, "or" includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises the element.

The utility model is described in further detail below with reference to the accompanying drawings.

Fig. 2 schematically illustrates an installation and use environment of a large tonnage bridge crane applicable to a variety of use scenarios according to one embodiment of the present utility model.

Referring to fig. 2, the large-tonnage bridge crane 200 applicable to various use scenes is used for shield machine installation of tunnel construction engineering, the ground of a shield machine installation room 110 is 18.5 m from the dome, the ground hole is 12 m wide, and the height of a rock anchor beam of a first rail 111 for installing a cart travelling mechanism of the crane is 11 m from the ground. The shield machine is installed in the middle of a tunnel, a smaller branch hole 120 needs to be excavated firstly, then a shield machine installation room 110 is excavated at the end of the branch hole 120, and the branch hole 120 is used for conveying components of a bridge crane and the shield machine to the installation room 110. Firstly, a large-tonnage bridge crane 200 is installed in a shield tunneling machine installation room 110, then one shield tunneling machine is installed in two opposite directions of a tunnel by the large-tonnage bridge crane 200, and the two shield tunneling machines can excavate the tunnel in two directions at the same time, so that the excavation efficiency can be improved, and the engineering time can be shortened. The weight of the cutter head of the heaviest installation unit of the shield machine exceeds 160 tons, and the diameter reaches 10 meters. In order to hoist such a large amount of shield machine cutterheads in such a small shield machine installation room 110, the lifting height of the hooks should be increased as much as possible so that the upper limit 2611 of the hooks is located at the highest possible position.

Fig. 3-6 schematically illustrate the construction of a large tonnage bridge crane applicable to a variety of use scenarios according to one embodiment of the present utility model.

Referring to fig. 3-4, the large tonnage bridge crane includes one cart travel mechanism 21 and two cart travel mechanisms 22.

The cart travelling mechanism 21 is in a rectangular frame shape as a whole and comprises two parallel bridges 211 and end beams 212 connected with two ends of the bridges 211, and two ends of the bridges 211 are in sliding connection with a first rail 111 arranged on the rock anchor beam. The bottoms of two ends of the bridge 211 of the cart travelling mechanism 21 are provided with travelling rollers, and the travelling rollers are driven by a motor, so that the whole cart travelling mechanism 21 can reciprocate along the first rail 111.

The auxiliary trolley 222 is in a rectangular frame shape as a whole, and comprises a first main beam 251 and a second main beam 252 which are arranged in parallel, and two auxiliary beams 254 which are respectively connected with the first main beam 251 and the second main beam 252 at two ends. The primary trolley 221 further has a branch 253 parallel to the first 251 and second 252 main beams on the basis of the secondary trolley 222. Two ends of the main trolley 221 and the auxiliary trolley 222 are respectively connected with two bridges 211 in a sliding manner, second rails 112 are arranged on the bridges 211, and rollers matched with the second rails 112 are arranged on the lower portions of the auxiliary beams 254. The rollers of the main carriage 221 and the sub carriage 222 are driven by motors, respectively, and the main carriage 221 and the sub carriage 222 can reciprocate along the bridge 211 of the cart travelling mechanism 21, respectively.

A spool 233 of a sub winch for driving the sub hook 263 to move up and down is provided on the first main beam 251 of the sub trolley 222, and the rated load of the sub hook 263 is 100 tons.

A main hoist drum 231 is provided on the first main beam 251 of the main trolley 221. The two fixed pulley blocks 241 comprise a left fixed pulley block 2411 and a right fixed pulley block 2412, the pulley shaft directions of the left fixed pulley block 2411, the right fixed pulley block 2412 and the balance wheel 243 are vertical to the first main beam 251 and the second main beam 252, and two ends of the support seats of the left fixed pulley block 2411, the right fixed pulley block 2412 and the balance wheel 243 are respectively supported above the first main beam 251 and the second main beam 252. The main hook group includes a left movable pulley block 2421, a right movable pulley block 2422, a hanger plate 270, and a main hook 261. The main hook 261 of the main trolley 221 is connected to two movable pulley blocks 242 via a hanger plate 270, and the main hook 261 is rated for 200 tons. The small winch drum 232 is arranged above the supporting beam 253, the small winch is used for driving the small lifting hook 262 to move up and down, the small lifting hook 262 is arranged below the supporting beam 253, and rated load is 25 tons.

The two trolleys 22 are provided with an anti-collision device 352, a limiting device 351 and a trolley baffle column 361.

Referring to fig. 4, the left and right movable pulley blocks of the main hook group are respectively located below the left and right fixed pulley blocks and between the first main beam 251 and the second main beam 252 of the trolley frame. The maximum dimension B of the hanger plate 270 of the main hanger group perpendicular to the direction of the first main beam 251 is smaller than the minimum distance Ax between the first main beam 251 and the second main beam 252, and the hanger plate 270 is lifted to a position between the first main beam 251 and the second main beam 252 during lifting of the main hanger group.

Referring to fig. 5 and 6, both ends of the wire rope 271 of the main hoist drum 231 are fixed to both ends of the main hoist drum 231, respectively, and the middle of the wire rope 271 is suspended on the balance 243 as a balance section 543. The left section of the wire rope 271 includes a left winding section 541 that bypasses the main hoist drum, a left fixed pulley section 511 that bypasses the left fixed pulley block 2411, and a left movable pulley section 521 that bypasses the left movable pulley block 2421, and the right section of the wire rope 271 includes a right movable pulley section 522 that bypasses the right movable pulley block 2422, a right fixed pulley section 512 that bypasses the right fixed pulley block 2412, and a right winding section 542 that bypasses the right section of the main hoist drum. In this embodiment, each movable pulley block 242 has three movable pulleys, and each fixed pulley block 241 has three fixed pulleys, so that the wire rope winds three times between the fixed pulley block 241 and the movable pulley block 242 on the same side.

Referring to fig. 4, when the main hook 261 is lifted to a position at the upper limit 2611 by the main hoist traction, the hanger plate 270 is positioned between the first main beam 251 and the second main beam 252, and the upper limit 2611 of the main hook 261 is positioned above the rail surface of the first rail 111. The upper limit 2611 of the main hook 261 is different from the rail surface height of the first rail 111 by D.

The trolley of the traditional bridge crane adopts a main beam, the fixed pulley block and the lifting hook are positioned below the main beam, so that the operation space of the lifting hook can only be below the main beam, and in order to achieve enough strength, the height of the main beam can be made larger, so that the upper part of a bridge frame of the bridge crane needs larger space for the trolley to operate, more space is arranged below the bridge frame and is not a hoisting space, and the lifting height of the lifting hook is lower. The trolley frame adopts a double-girder structure, reduces the girder height on the basis of ensuring the girder strength, not only can reduce the space above the bridge 211 for the trolley to operate, but also can enable the space between two girders to be the operating space of the movable pulley block 242, so that the upper limit 2611 of the main lifting hook 261 can be positioned above the rail surface of the first rail 111, and improves the lifting height of the main lifting hook 261.

Fig. 7-10 schematically illustrate hook block guiding and anti-toppling structures applicable to large tonnage bridge cranes of various usage scenarios in accordance with one embodiment of the present utility model.

Referring to fig. 8-9, the opposite sides of the first and second girders 251, 252 are each provided with a guide plate 323, and the guide plate 323 includes a guide web 3231 and a wing 3232. One side of the guide web is welded to the lower part of the opposite side of the first main beam 251 and the second main beam 252, the other side is an inclined plane, and wing plates are welded. The distance Az of the upper ends of the left and right wings is less than the distance Ad of the lower ends, az is less than the maximum distance B outside of the two hanger plates 270, ad is greater than the distance B outside of the two hanger plates 270.

Referring to fig. 7, a lifting motor and a speed reducer 244 drive a main hoist drum 231 to rotate, the main drum 231 lifts up the main hook group by winding a wire rope, and when the main hook group is lifted up to a proper distance near the bottom of the frame of the main trolley, a speed reducing signal is sent to a control system through a height sensor 33, and after the control system receives the speed reducing signal, the input frequency of the lifting motor is reduced, so that the main hook group continues to lift up at a low speed. When the hanger plate 270 enters the region between the first main beam 251 and the second main beam 252, the hanger plate 270 mounted with the two sets of movable pulley blocks 242 and the main hooks 261 gradually moves toward the middle of the first main beam 251 and the second main beam 252 in the ascending process due to the blocking of the guide plates 323 on the left and right sides, and the main hook sets can also be prevented from colliding with the trolley frame.

The traditional trolley frame main beam adopts a single main beam variable cross section design, so as to solve the problem of large stress generated by large bending moment in the middle of the main beam, and correspondingly adopts a large height cross section. Referring to fig. 9, in the present utility model, the main hook girder of the trolley frame is limited by the height of the tunnel, and the main hook girder of the trolley frame adopts a double girder design with the height equal to the equal section of the side girder, so that the height of the trolley can be greatly reduced without reducing the strength of the main girder of the trolley, and the trolley frame comprises a first girder 251 and a second girder 252 which are arranged in parallel, and two auxiliary girders 254 which are arranged in parallel and are connected with two ends of the first girder 251 and the second girder 252.

Referring to fig. 10, the guide and anti-collision device 32 further includes a balance wheel support 53, a travel switch 321, a guide rod 322, and a guide sleeve 324, and the top of the hanger plate 270 is provided with the guide sleeve 324. The guide rod 322 is inserted in the shaft hole of the balance wheel support 53, the upper end of the guide rod 322 is welded with the pressing plate 3211, and the guide rod 322 is in sliding connection with the shaft hole. The guide bushing 324 is coupled to the hanger plate 270 by bolts. Further lifting of the hook group, the guide sleeve 324 mounted on the hanger plate 270 gradually approaches the guide bar 322, and the guide bar 322 is inserted into the guide sleeve 324, so that the hanger plate 270 of the hook group during lifting is further guided toward the middle of the first main beam 251 and the second main beam 252.

The upper end of the guide rod 322 is welded with a pressing plate 3211, when the lifting hook group does not rise to the height of the main beam of the trolley frame, the pressing plate 3211 on the guide rod 322 presses the contact of the travel switch 321, when the lifting hook group drives the guide sleeve 324 to lift upwards, the guide rod 322 is inserted into the guide sleeve 324, the lifting hook group continues to lift to enable the guide rod 322 to move upwards, so that the pressing plate 322 leaves the contact of the travel switch 321, at the moment, a control system cuts off a lifting circuit of the lifting hook group, and potential safety hazards caused by further lifting of the lifting hook group are prevented.

A camera 31 is also mounted below the balance wheel support 53, and the status of the hook group can be monitored by a visual system. The control system compares the real-time state diagram of the hook group shot by the camera 31 with the pre-stored normal state diagram of the hook group to judge whether the lifting circuit of the hook needs to be cut off. The system can sense whether the lifting hook group enters a gap between the first main beam 251 and the second main beam 252 of the trolley through video data acquired by the camera 31, and after the comparison with a standard picture, the comparison is passed, the lifting hook group is in a normal state, the lifting hook group continues to ascend, the comparison is not passed, the lifting hook group is in an abnormal state, and then the control system outputs a signal for stopping the lifting hook group from ascending so as to control the lifting hook group to stop ascending, thereby ensuring the operation safety.

Fig. 12 schematically illustrates a hook group sway reducing structure and concept applicable to a wide variety of use scenarios for a large tonnage bridge crane according to one embodiment of the present utility model.

Referring to fig. 12, the fixed pulley block 241 and the movable pulley block 242 are arranged in two groups, and by adopting the structure, the principle is similar to that of lifting a lifting hook and a heavy object by two groups of pulley blocks, and when the heavy object does not swing, the distance between the left fixed pulley block 2411 and the left movable pulley block 2421 is equal to the distance between the right fixed pulley block 2412 and the right movable pulley block 2422, and the distances are all H1. When the cart starts to walk backwards or walk in an accelerating way, due to inertia, the steel wire rope 271 is a flexible element, and after the steel wire rope deflects, an angle alpha is generated between the steel wire rope and the original vertical state, at the moment, a height difference occurs between the left movable pulley block 2421 and the right movable pulley block 2422 which are originally positioned at the same height, namely, a connecting line OA of a rotating shaft of the left movable pulley block 2421 and the right movable pulley block 2422 which are originally horizontal rotates to OB around an O point, so that the distance H2 between the right fixed pulley block 2412 and the right movable pulley block 2422 is larger than the distance H1 between the left fixed pulley block 2411 and the left movable pulley block 2421, namely, an included angle beta exists between the OA and the OB. Since the left and right wire ropes of the balance wheel 234 are the same wire rope, as shown in fig. 6, and the lengths of the two sides are kept equal by the balance wheel 243 in the middle, the friction force between the wire rope 271 and the fixed pulley block 241 and the movable pulley block 242 and the balance action of the balance wheel 243 can prevent the phenomenon that H2 is greater or less than H1, the swing of the hook group on the trolley in the travelling process of the trolley travelling mechanism 21 can be reduced by the structural design.

The larger the installation interval S between the two groups of fixed pulley blocks is, the larger the height difference between H2 and H1 is, so that the swinging reduction effect can be better by enlarging the installation interval S value of the two groups of fixed pulley blocks and matching with the multi-multiplying power pulley blocks.

Fig. 13-15 schematically illustrate a hook group sway reducing structure applicable to a wide variety of use scenarios for a large tonnage bridge crane according to another embodiment of the present utility model.

Referring to fig. 13-15, the hook set sway reducing structure includes a telescoping rod 348 disposed on top of a hanger plate 270 of the hook set and four displacement sensors 340 for detecting the position of the telescoping rod. The lower end of the telescopic rod 348 is connected to the hanger plate 270, and the middle part is mounted on the telescopic rod mounting seat 343 through the aligning roller bearing 345. The telescopic rod mount 343 is connected to the first and second girders 251 and 252 of the trolley, and may be mounted on the balance wheel mount 53. Telescoping boom 348 can retract as the hook set is raised or extend as the hook set is lowered.

Four displacement sensors 340 are installed below the balance wheel support 53, are uniformly distributed on the circumference taking the telescopic rod 348 as the center of a circle, and are respectively arranged in one according to the front, back, left and right running directions of the crane cart running mechanism and the trolley running mechanism for detecting the displacement of the telescopic rod 348 in four directions. The displacement sensor 340 may be a device such as a proximity switch that may be used to detect displacement of an object. In the present embodiment, four displacement sensors 340 are used, and in other embodiments, the number of displacement sensors 340 may be set to three or six or other numbers as needed.

The displacement sensor 340 outputs displacement data of the telescopic rod to the control device.

The control device 300 is used for determining the swinging direction of the hook group according to the received displacement data and outputting a driving instruction to the driving device.

The driving device executes a driving instruction to drive the cart or trolley of the bridge crane to decelerate or accelerate. The driving device may be a device such as a motor that can drive the cart or trolley to move.

The telescopic rod 348 is composed of four telescopic joints which are arranged from outside to inside, the first telescopic joint 3481 which is arranged at the outermost part comprises an upper pressing plate 342, a steel pipe 346 and a lower pressing plate 341 which are sequentially connected from top to bottom, and each of the second telescopic joint 3482, the third telescopic joint 3483 and the fourth telescopic joint 3484 is sequentially provided with the upper pressing plate 342, a sliding bearing 349, a connecting shaft 347, the steel pipe 346 and the lower pressing plate 341 from top to bottom. The steel pipe 346 may be a seamless steel pipe.

On the same expansion joint, a steel pipe 346 is fixedly connected to the lower end of the connecting shaft 347, a slide bearing 349 is fitted over the connecting shaft 347, and an upper pressure plate 342 is connected to the upper end of the connecting shaft 347. The outer diameter of the upper pressure plate 342 is smaller than the outer diameter of the sliding bearing 349 and larger than the inner diameter of the sliding bearing 349. The inner diameter of the lower platen 341 is identical to the inner diameter of the steel pipe 346.

The adjacent telescopic joints are provided with gaps of 2-3 mm, the sliding bearing 349 is provided with gaps of 1-2 mm between the adjacent external telescopic joints, and when the internal telescopic joints are eccentric or the lifting hook group is deflected, the sliding bearing 349 slides in the steel pipes of the adjacent external telescopic joints, so that the sliding friction force is reduced and the processing cost is reduced. The bottom of each expansion joint is provided with a lower pressing plate 341, and the lower pressing plate 341 of the innermost expansion joint is connected with the bottom of the hanging plate through bolts.

The lower parts of the lower pressure plates 341 of the first expansion joint 3481, the second expansion joint 3482 and the third expansion joint 3483 are connected with flange rings 3411. The flange 3411 has an inner diameter larger than the outer diameter of the steel pipe 346 of the adjacent inner expansion joint and smaller than the outer diameter of the slide bearing of the adjacent inner expansion joint. Flange 3411 prevents the inner adjacent telescopic joint from backing out.

A telescopic rod shaft 344 is welded to the outside of a steel pipe 346 of the outermost first telescopic joint 3481, and the telescopic rod shaft 344 is mounted on a telescopic rod mounting seat 343 through a self-aligning roller bearing 345.

When the lifting hook group swings, the lower end of the telescopic rod 348 is connected with the lifting plate 270 of the lifting hook group through bolts, the middle part of the telescopic rod 348 is fixed on the telescopic rod mounting seat 343 through the aligning roller bearing 348, the telescopic rod 348 can swing along with the lifting hook group, after swinging, the distance between one side of the telescopic rod 348 and the displacement sensor 340 becomes smaller, the displacement sensor 340 arranged on the side sends an induction signal to a control system, and a PLC (programmable logic controller) in the control system controls a running mechanism to decelerate in the opposite direction or accelerate in the same direction. For example, when the crane starts to walk forward, the hook group swings backward due to inertia, the telescopic rod 348 generates a backward swing angle, the displacement sensor 340 located at the rear side senses the telescopic rod 348 and sends out a signal, and the control system receives the signal and controls the traveling mechanism to decelerate forward or accelerate backward. The displacement sensor 340 may be a device such as a proximity switch that may be used to detect displacement of an object.

For example, when the displacement sensor 340 detects that the telescopic link 348 moves backward, the displacement sensor 340 outputs displacement data of the telescopic link to the control device 300, the control device determines that the hook group swings backward, which means that the forward speed of the cart running mechanism 21 is too high, the control device outputs a deceleration control command to the driving device of the cart running mechanism 21, the driving device of the cart running mechanism 21 drives the cart running mechanism 21 to decelerate, and the backward swing amplitude of the hook group is reduced. If displacement sensor 340 detects movement of telescoping rod 348 to the left or right, rocking of the hook set may be reduced by controlling the speed or acceleration of trolley 22.

In addition, in this embodiment, the outer diameter of the telescopic rod 348 is 200 mm, and the telescopic rod is composed of four sections of telescopic joints, the tail is provided with a sliding mechanism, the gap between the inner section and the outer section in the whole length direction is smaller, and the telescopic rod is a rigid and flexible structure with larger slenderness ratio, can bear a certain bending moment and lateral force, and when the lifting hook group or the heavy object deflects, the telescopic rod 348 generates elastic deformation and forms a reverse acting force, so that the swinging of the lifting hook group or the heavy object can be prevented, and the swinging of the lifting hook group can be relieved. In other embodiments, the number of telescopic joints may be adjusted according to the lifting height of the hook set.

The large-tonnage bridge crane applicable to various use scenes has a lifting mode, namely, a main lifting hook of a main trolley and a lifting hook of an auxiliary trolley lift and lift the same article at the same time. In order to ensure safe operation of the lifting mode, a lifting protection system is provided, and the system comprises a main trolley load sensor, an auxiliary trolley load sensor, a main trolley wheel encoder, an auxiliary trolley wheel encoder, a lifting hook group height detection device 33 of the main trolley and a lifting hook group height detection device 33 of the auxiliary trolley.

The lifting protection method of the double-axle crane with the lifting mode comprises a lifting protection method and a walking protection method. The lifting protection method comprises a load protection method, a lifting speed protection method and a lifting height protection method, and the walking protection method comprises a lifting point distance protection method and a walking speed protection method. One or a combination of more protection methods can be adopted in the actual working condition.

The main trolley load sensor is used for detecting the load of the main trolley lifting hook, the auxiliary trolley load sensor is used for detecting the load of the auxiliary trolley lifting hook, the main trolley wheel encoder is used for detecting the walking distance of the main trolley, the auxiliary trolley wheel encoder is used for detecting the walking distance of the auxiliary trolley, the main trolley height detection device is used for detecting the lifting height of the main trolley lifting hook, and the auxiliary trolley height detection device is used for detecting the lifting height of the auxiliary trolley lifting hook.

The lifting and lifting line of the double-axle crane can be protected by the following method by utilizing the detection device and other measuring tools and through PLC control.

The middle shield construction of the tunnel needs to install two shield machines between shield machine installation, and the directions of the two shield machines are opposite, so that the position and the square placement direction of two trolleys of a bridge crane for installing the two shield machines can be adjusted. The large-tonnage bridge crane has high customization cost, and can cause resource waste if only used for installing the shield machine, and after the tunnel construction is completed, the large-tonnage bridge crane for construction needs to be converted into hoisting equipment for production. When the large-tonnage bridge crane is used as tunnel construction equipment, the large-tonnage bridge crane is limited by space arrangement, tunnel limit size and other aspects, so that the large-tonnage bridge crane is required to meet the use requirements of different use scenes such as two-direction shield tunneling machine hoisting construction, segment hoisting and production hoisting of a tunnel, and structurally has to be provided with a flexible functional conversion design.

Fig. 3 is a layout diagram of a primary trolley and a secondary trolley of a use scene of the forward hoisting shield machine.

The main trolley 221 is located to the right of the bridge 211, the secondary trolley 222 is located to the left of the bridge 211, and the main hook 261 of the main trolley 221 is located to the right of the main trolley 221.

FIG. 11 is a layout of a primary trolley and a secondary trolley of a reverse-lifting shield machine use scenario.

The main trolley 221 is located to the left of the bridge 211, the secondary trolley 222 is located to the right of the bridge 211, and the main hook 261 of the main trolley 221 is located to the left of the main trolley 221.

Fig. 12 is a layout of a primary trolley and a secondary trolley for a use scene of a lifting duct piece.

The main trolley 221 is located to the left of the bridge 211, the secondary trolley 222 is located to the right of the bridge 211, and the main hook 261 of the main trolley 221 is located to the left of the main trolley 221. After the shield tunneling machine is installed, the bridge crane is switched into a use scene of hoisting duct pieces, and the main trolley is required to be integrally rotated by 180 degrees to improve the construction efficiency and the operation safety, so that the auxiliary lifting mechanism of the main trolley is adjusted to the middle, and the operation range of the auxiliary lifting mechanism in the middle is increased.

Fig. 13 is a layout of a primary trolley and a secondary trolley when used as hoisting equipment in production.

After the shield construction is completed, the bridge crane for tunnel construction is converted into the bridge crane for production after proper adjustment in order to avoid resource waste.

Referring to fig. 13, in the production use scenario, the main trolley 221 is located on the right of the bridge 211, the sub trolley 222 is located on the left of the bridge 211, the main trolley 221 is rotated 180 degrees, the main hook 261 is located on the right of the main trolley 221, and the sub hook 262 is located on the left of the main trolley 221.

The lifting height of the large-tonnage crane in the production use scene is 24 meters, the length of the steel wire rope of the main winch is longer than that of the large-tonnage crane in the construction use scene, and the steel wire rope is basically distributed on the whole main winch drum 231. The rotation axis of the fixed pulley block 241 is adjusted to be parallel to the first main beam 251, and thus the hanger plate of the main hanger 261 is perpendicular to the first main beam 251, and the hanger plate of the sub hanger 263 is also perpendicular to the first main beam 251. The supports of the two fixed pulley blocks 241 are adjusted to be fixed to the first main beam 251 and the second main beam 252, respectively, and the positions of the two fixed pulley blocks 241 are adjusted to be arranged front and back at both sides below the main drum 231. The hanger plate 270 of the main hanger set becomes perpendicular to the first main beam 251 and the second main beam 252.

In fig. 3, 11 and 12, the lifting height of the large-tonnage crane in tunnel construction is 11 meters, the main hook group and the auxiliary hook group of the main trolley need to be lifted above the rail surface of the first rail 111, the hanging plates 270 of the main hook group and the auxiliary hook group are arranged parallel to the first main beam 251 and the second main beam 252, the hanging plates 270 need to be lifted between the two main beams of the trolley frame, and the support of each fixed pulley block and the support of the balance wheel respectively span the two main beams of the trolley frame. The length of the wire rope of the hoist is short, the wire rope is only covered on the outer side of the pulley outside the lifting hook group on the main winding drum 241, and the rotating shafts of the two fixed pulley blocks 241, the two fixed pulley blocks 242 and the balance pulley block 243 are perpendicular to the first main beam 251. The two fixed pulley blocks 241 are arranged left and right below one side of the main drum 231.

Fig. 14-15 schematically show the construction of a main trolley of the large tonnage crane of the utility model when used as hoisting equipment in production.

Fig. 16 schematically shows the arrangement of the first and second mounting locations of the trolley frame of the main trolley of the large tonnage crane of the utility model.

Referring to fig. 14 to 16, the first fixed pulley block mounting position 441 is a mounting position of the fixed pulley block 241 during construction, and the rotation axis of the fixed pulley block 241 during construction is perpendicular to the first main beam 251, so the first fixed pulley block mounting position 441 is two sets of screw holes parallel to the first main beam 251. The second fixed pulley block mounting position 442 is a mounting position of the fixed pulley block 241 during production, and the rotation axis of the fixed pulley block 241 during production is parallel to the first main beam 251, so the first fixed pulley block mounting position 441 is two sets of screw holes perpendicular to the first main beam 251.

Referring to fig. 16, two sets of installation positions are provided on a first main beam 251 and a second main beam 252 of the main trolley, the first installation position is used for installing equipment such as a main winch, a main speed reducer, two fixed pulley blocks 241 and the like for constructing a use scene, and the second installation position is used for installing equipment such as the main winch, the main speed reducer, the two fixed pulley blocks 241 and the like for producing the use scene. The main trolley is converted from a construction use scene of the shield machine to a production use scene, and the devices such as a motor, a speed reducer, a brake, a winding device and a height sensor need to translate a distance K to one side of the small winding drum, wherein K is 244 mm in the embodiment. A reel seat, a speed reducer seat and a motor seat are arranged on the first main beam 251. The spool seat is provided with two groups of installation positions of the main spool 231, the first main spool installation position 411 is the installation position of the main spool 231 during construction, and the second main spool installation position 412 is the installation position of the main spool 231 during production. The main spool 231 is located higher than the fixed pulley block 241. In this embodiment, the first main spool mounting location 411 is 244 millimeters from the second main spool mounting location 412.

The speed reducer base is provided with two groups of speed reducer mounting positions, wherein the first speed reducer mounting position 421 is the mounting position of the speed reducer of the main hoisting device during construction, and the second speed reducer mounting position 422 is the mounting position of the speed reducer of the main hoisting device during construction. Two groups of motor installation positions are arranged on the motor base, the first motor installation position 431 is the installation position of the motor of the main hoisting device during construction, and the second motor installation position 432 is the installation position of the motor of the main hoisting device during construction.

In the construction state, the steel wire rope is shorter, when the lifting hook is lifted to the upper limit, the steel wire rope is arranged on the outer side of the lifting hook pulley block, no steel wire rope is wound in the middle of the main winding drum 231, the steel wire rope winds into the fixed pulley block from the outer side of the movable pulley block of the lifting hook group, and the balance wheel 243 is arranged between the two fixed pulley blocks 241. When in a construction state, a motor, a speed reducer, a brake, a hoisting device and a height sensor of a main hoisting mechanism of the main trolley and a main hoisting mechanism of the auxiliary trolley are assembled at the 1 st installation position.

In the use scene of production, because the lifting height of lifting hook can be great, and the lifting hook need not lift to the bottom surface of dolly more than when lifting, and the lifting hook group can reserve certain safe distance with the bottom surface of dolly. At this time, the hanger plates of the hanger group are arranged perpendicular to the length direction of the main beam of the trolley frame. The rotating shafts of the two groups of fixed pulley blocks 241 are parallel to the main beams of the trolley frame and are respectively arranged on the two main beams of the trolley frame. The motor, the speed reducer, the brake, the hoisting device and the height sensor of the main hoisting mechanism of the main and auxiliary trolley are all assembled at the 2 nd installation position.

Fig. 17 schematically shows a wire rope winding structure of a main hoisting mechanism when the large tonnage crane of the utility model is used as hoisting equipment in production.

Referring to fig. 6 and 17, the main and auxiliary trolley main hoisting mechanisms for construction use and production use are different in composition, and the main and auxiliary trolley main hoisting mechanisms for construction use comprise balance wheels 243 and balance wheel supports 53, and the balance wheels 243 are relied on to keep the left and right balance of the steel wire rope. Referring to fig. 17, the main and auxiliary trolley main hoisting mechanisms in the production and use scenario have no independent balance wheel and balance wheel support, and respectively rely on one side pulley 245 in the front and rear fixed pulley blocks 241 as a balance wheel to keep the front and rear balance of the steel wire rope. Both ends of the wire rope 271 of the main hoist 231 are fixed to both ends of the main hoist drum 231, respectively. The left section of the steel wire rope 271 comprises a left winding section 541 which bypasses the left section of the main winch drum, a front fixed pulley section 611 which bypasses the front fixed pulley block and a front movable pulley section 621 which bypasses the front movable pulley block, and the right section of the steel wire rope 271 comprises a rear movable pulley section 622 which bypasses the rear movable pulley block, a rear fixed pulley section 612 which bypasses the rear fixed pulley block and a right winding section 542 which bypasses the right section of the main winch drum. In this embodiment, each movable pulley block 242 has three movable pulleys, and each fixed pulley block 241 has three fixed pulleys, so that the wire rope winds three times between the fixed pulley block and the movable pulley block on the same side. The rightmost wheel of the front fixed pulley block and the rear fixed pulley block is a balance wheel, and one section of the steel wire rope wound on the balance wheel is an edge pulley section 643.

Compared with the number of pulleys of the traditional pulley block, the fixed pulley block structure of the large-tonnage crane is characterized in that the number of the traditional fixed pulleys is reduced by 2 twice as large as the number of the movable pulleys n, namely, the number of the fixed pulleys is 2 times smaller than the number of the movable pulleys of the lifting hook group, and in the large-tonnage crane, the number of the fixed pulleys is twice as large as the number of the movable pulleys n, namely, the number of the fixed pulleys is the same as the number of the movable pulleys of the lifting hook group, wherein 2 side pulleys do not act in a construction use scene, and 2 side pulleys are jointly used as balance wheels in a production use scene.

The conversion installation mode of the auxiliary trolley 222 from the construction use scene of the shield machine to the production use scene is basically consistent with that of the main trolley 221, and the devices such as a motor, a speed reducer, a brake, a hoisting device, a height sensor and the like are not described again.

The bridge 211 is respectively provided with a left power supply device 301 and a right power supply device 302 for supplying power to the trolley, the main trolley and the auxiliary trolley are respectively provided with a terminal box 303, the left power supply device 301 and the right power supply device 302 are configured according to the maximum power supply capacity, the maximum number of power supplies and control paths, any power supply device meets the power supply and control requirements of the main trolley and the auxiliary trolley, a quick plug is arranged between the power supply device and the terminal box, and when the position of the trolley needs to be changed or the trolley rotates 180 degrees, the power supply and the control circuit of the main trolley and the auxiliary trolley can be quickly replaced.

The method for converting the construction use scene into the production use scene comprises the following steps of:

And 1, removing the lower limit protection of the descending of the main lifting hooks of the main and auxiliary trolleys, and descending the main lifting hook group of the main and auxiliary trolleys to the ground for fixing.

And 2, dismantling the steel wire rope of the main lifting mechanism of the main trolley and the auxiliary trolley.

And 3, dismantling a balance wheel device and a balance wheel support which are configured in the construction use scene.

And 4, loosening connecting bolts of the fixed pulley blocks and the trolley frame, respectively rotating the two groups of fixed pulley blocks by 90 degrees, respectively mounting the fixed pulley blocks on a first main beam and a second main beam of the trolley frame, and keeping a distance A between centers of the two groups of fixed pulleys in the direction of a vertical pulley shaft. In this embodiment, A is 160 millimeters.

And 5, loosening connecting bolts of a main lifting mechanism motor, a speed reducer, a brake, a hoisting device, a height sensor and a trolley frame of the main trolley and respectively assembling the connecting bolts at the 2 nd installation position.

And 6, winding the steel wire rope, selecting the steel wire rope meeting the large lifting height, sequentially winding the front pulley block and the front fixed pulley block of the lifting hook from the middle to the front fixed pulley block at one end, fixing the steel wire rope at the left fixed end of the winding drum, sequentially winding the rear pulley block and the rear fixed pulley block of the lifting hook from the middle to the rear fixed pulley block at the other end, and fixing the steel wire rope at the right fixed end of the winding drum.

And 7, readjusting the upper and lower limit heights of the main and auxiliary trolley main hoisting devices to enable the main and auxiliary trolley main hoisting devices to be in a safe operation range.

Fig. 18-20 schematically illustrate the frame structure of the main trolley of a large tonnage crane according to an embodiment of the present utility model.

Referring to fig. 18 to 20, the main trolley 221 includes a first main beam 251, a second main beam 252, and a branch beam 253, which are parallel to each other, and two sub-beams 254 (including a first sub-beam 2541 and a second sub-beam 2542) connecting the first main beam 251, the second main beam 252, and the branch beam 253. The upper end outer edge of the first main beam 251 is provided with a guard rail 74. A gap is provided between the first girder 251 and the second girder 252 for the wire rope or the hook group to pass through. The outer side first guard plate 256 of the first main beam 251 is provided with a first through hole 2561 which is penetrated up and down, and a wire rope of a main hoist of the bridge crane passes through the first through hole. The upper edge of the first guard 256 is provided with a guard rail 74.

A telescopic rail 70 is provided on the second main beam 252 at a side close to the first main beam 251. The telescopic rail 70 is integrally formed in an L shape, and includes a rail 71 and a telescopic seat including a bottom bar 72 connected to the rail 71, and a base 73 provided on the second main beam 252. The base 73 is hollow, and the bottom rod 72 is inserted into the base 73. Referring to fig. 18, when the crane is in a construction state, the main hoist is installed at the first installation position, and the bottom bar 72 may be pulled out from the base 73 toward the first main beam 251. Referring to fig. 19, when the crane is in a production state, the main winding device is installed at the second installation position, and the bottom bar 72 can be pushed in the direction of the second main beam 252, so that the handrail 71 of the telescopic rail 70 does not interfere with the main drum 231.

The supporting beam 253 is abutted against the second main beam 252, and a second through hole 2531 which is vertically penetrated is formed in the supporting beam 253, and the second through hole 2531 is used for a steel wire rope of a small winch to pass through. The other side of the supporting beam 253 is also provided with a second guard board 255, a guardrail 74 is arranged on the second guard board 255, a third through hole 2551 is arranged on the inner side of the second guard board 255, and the third through hole 2551 is used for a steel wire rope of a small winch to pass through.

The two ends of the main beam of the traditional trolley frame are lapped on the upper end of the auxiliary beam, so that the overall height of the trolley frame is higher. Due to the limitation of the size of the use scene of the bridge crane in the tunnel, the height of the trolley frame is required to be as small as possible. Referring to fig. 20, both ends of a first main girder 251 and a second main girder 252 of a bridge crane according to the present utility model are inserted into a first sub-girder 2541 and a second sub-girder 2542 and welded with the first sub-girder 2541 and the second sub-girder 2542, and upper surfaces of the first main girder 251 and the second main girder 252 are flush with upper surfaces of the first sub-girder 2541 and the second sub-girder 2542. Thus, the height of the trolley frame is reduced by half compared with the height of the traditional trolley frame.

It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present application.

Claims (9)

1. The trolley frame of the large-tonnage bridge crane is characterized by comprising two parallel first main beams and second main beams, and a first auxiliary beam and a second auxiliary beam which are respectively connected with the first main beams and the second main beams at two ends;

The device also comprises a main winch drum mounting seat, a main speed reducer mounting seat, a main motor mounting seat, two fixed pulley block mounting seats and a balance wheel mounting seat;

The main winch drum mounting seat is arranged on the first auxiliary beam and is close to the first main beam, and the main speed reducer mounting seat is arranged on the second auxiliary beam;

The main winch winding drum mounting seat is provided with a first main winding drum mounting position and a second main winding drum mounting position;

A first speed reducer installation position and a second speed reducer installation position are arranged on the main speed reducer installation seat;

the main motor mounting seat is provided with a first motor mounting position and a second motor mounting position;

The connecting lines of the first installation position and the second installation position of the main winch winding drum, the main speed reducer and the main motor are perpendicular to the first main beam and the second main beam, and the distances between the first installation position and the second installation position are equal;

when the bridge crane is in a tunnel construction use scene:

the main winch winding drum, the main speed reducer and the main motor are all positioned at a first installation position, one end of the fixed pulley block installation seat and one end of the balance wheel installation seat are arranged on a first main beam, and the other end of the fixed pulley block installation seat is arranged on a second main beam, so that the rotating shafts of the fixed pulley blocks are perpendicular to the first main beam and the second main beam;

When the bridge crane is in a production and use scene, the main winch winding drum, the main speed reducer and the main motor are all in a second installation position, one fixed pulley block installation seat is arranged on the first main beam, the other fixed pulley block installation seat is arranged on the second main beam, and the rotating shafts of the two fixed pulley blocks are parallel to the first main beam and the second main beam.

2. The trolley frame applicable to the large-tonnage bridge crane in various use scenes according to claim 1, wherein the first guard plate is arranged on the outer side of the first main beam and is provided with a first through hole which penetrates up and down.

3. The trolley frame of claim 2 further comprising a corbel disposed parallel to the first main beam;

The supporting beam is abutted against the second main beam, and a second through hole which penetrates up and down is formed in the supporting beam.

4. The trolley frame applicable to a large-tonnage bridge crane in various use scenarios according to claim 1, further comprising two anti-collision devices symmetrically arranged relative to the center line of the trolley.

5. The trolley frame applicable to the large-tonnage bridge crane in various use scenes according to any one of claims 1 to 4, wherein the bridge crane comprises a lifting hook group, rough guide plates are arranged on opposite sides of a first main beam and a second main beam, and the opposite sides of the rough guide plates on the two sides are inclined planes;

the distance between the upper ends of the opposite inclined planes is smaller than that between the lower ends;

The distance between the upper ends of the opposite inclined planes is smaller than the maximum dimension of the lifting hook group, which is perpendicular to the directions of the first main beam and the second main beam;

The distance of the lower ends of the opposite inclined planes is larger than the maximum dimension of the lifting hook group perpendicular to the directions of the first main beam and the second main beam.

6. The trolley frame applicable to a large tonnage bridge crane in various use scenarios according to claim 5, wherein the rough guide plate comprises a rough guide web and a wing plate;

one side of the rough guide web is welded at the lower part of the opposite side of the first main beam and the second main beam, the other side of the rough guide web is an inclined plane, and a wing plate is arranged.

7. The trolley frame of a large tonnage bridge crane applicable to various use scenes according to any one of claims 1-4, wherein a telescopic guardrail is arranged on one side of the second main beam, which is close to the first main beam, and the telescopic guardrail is arranged so that the position of the telescopic guardrail can be switched between the second main beam and the first main beam.

8. The trolley frame applicable to the large-tonnage bridge crane with various use scenes according to claim 7, wherein the telescopic guardrail is integrally L-shaped and comprises an armrest and a telescopic seat, wherein the telescopic seat comprises a bottom rod connected with the armrest and a base arranged on a second main beam;

The bottom rod is arranged in the base in a penetrating way and is connected with the base in a sliding way.

9. The trolley frame applicable to the large-tonnage bridge crane with various use scenes according to claim 1, wherein two ends of the first main beam and the second main beam are spliced with two ends of the first auxiliary beam and the second auxiliary beam, and the upper surfaces of the first main beam and the second main beam are flush with the upper surfaces of the first auxiliary beam and the second auxiliary beam.