CN116005501A

CN116005501A - Rail large rail part paving and replacing operation method

Info

Publication number: CN116005501A
Application number: CN202310007265.3A
Authority: CN
Inventors: 陈亮陪; 李石平; 晏红文
Original assignee: Zhuzhou CSR Times Electric Co Ltd
Current assignee: Zhuzhou CRRC Times Electric Co Ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-04-25

Abstract

The application discloses a method for paving and replacing large rail pieces of a rail, wherein a first transport flat car and a second transport flat car are connected with a rail car in a group and run to a designated position of a replacement operation site. The door hanging devices are clamped and turned one by one through the retraction device, and meanwhile, the door hanging devices are detached from the first transportation flatcar according to the positions and the sequences after being restored to the unfolding state and are placed at the designated positions. The new rail large rail piece is unloaded from the second transportation flatcar through a group crane consisting of a plurality of door hanging devices and is placed on one side of a line below the door hanging devices, the detached old rail large rail piece is hoisted to the other side, and then the new rail large rail piece is hoisted to the position of the original old rail large rail piece on the line, so that the replacement of the new and old rail large rail pieces is completed. And after the line is recovered, recovering the old rail parts and the door hanging device according to the same method, and driving away the first transport flat car and the second transport flat car from the rail car group. The large rail piece replacement device can solve the technical problems that an existing large rail piece replacement device is complex in structure and operation, high in cost and limited in space utilization.

Description

Rail large rail part paving and replacing operation method

Technical Field

The application relates to the technical field of railway engineering machinery, in particular to a rail large rail part paving operation method for a high-speed rail.

Background

The high-speed railway line mainly refers to an operation line with the operation speed of more than 250km, and because an operation vehicle passes through quickly, wheels impact and crush, the rail line is easy to change due to long-distance abrasion. The high frequency traffic of vehicle requires that the rail can be repaired fast after wearing and tearing, in order to save time, the big rail spare subassembly of track, like: the switch core and the switch rail need to be replaced simultaneously. The large rail part of the high-speed rail is mainly a long rail with the size of about 50m, rail large rail part components (fork, connecting rail, point rail, stock rail and the like) with the size of 18 # and above, and main parts such as rail plates and the like, and is characterized by longer size, heavier weight and difficult manual replacement. However, because the working area of the large rail part of the high-speed rail is limited, the existing rail exchanging equipment, 25-ton rail cranes and other equipment cannot meet the requirements. Therefore, how to realize the rapid replacement of the large rail part of the high-speed rail is a technical problem to be solved currently.

At present, the method for replacing the large rail part of the high-speed rail mainly comprises the following steps:

the first mode adopts 2-3 to lift the large rail parts of the rail from the adjacent line by adopting the 25T crane rail car, the large rail parts are easy to damage due to deformation in the operation process, and the technical problem that large swing easily occurs and potential safety hazards are generated due to poor operation synchronism of a plurality of crane rail cars.

The second mode is to use a large-scale road maintenance mechanical equipment rail-changing vehicle to change rails for a long distance, and the mode is only suitable for the long-distance rail-changing of kilometer level because of the characteristics of operation equipment and is overlong in preparation work. Meanwhile, the equipment is adopted to replace rails with hundreds of meters, and the loss of the end guide rail exceeds the length required to be replaced. Thus, the main drawbacks of this approach are: high cost, low efficiency and is not suitable for replacing the steel rail with the length of about 50 m.

In the prior art, the following technical solutions are mainly related to the present application:

prior art 1 is filed by the applicant in 2022, 03 and 31, and published in 2022, 07 and 29, and published in CN114808567a, a chinese invention application for a railway line component laying gantry crane and a method for operating the same. The application discloses a railway line part shop and trade door hanging device and operation method thereof, the device includes: truss; the transverse moving mechanism is arranged on the truss and can transversely move along the truss so as to adjust the hoisting position; the transverse moving mechanism comprises a lifting mechanism, and the lifting mechanism can drive the loop chain to vertically lift and move so as to realize the carrying of railway line components; the left support leg and the right support leg are respectively movably arranged at the lower parts of the left end and the right end of the truss, and can transversely move along the truss so as to adjust the transverse span of the door hanging device. The left support leg and the right support leg can vertically lift to adjust the height of the truss from the working surface. The application can solve the technical problems that the existing railway line component replacement mode occupies adjacent line space, has operation safety risk, is inflexible to operate and is difficult to adapt to operation requirements under complex working conditions of the railway line.

Prior art 2 is filed by the applicant at 2022, month 05 and date 07, and announced at 2022, month 05, and Chinese patent application No. CN114701954A, a switch replacing device and system. The application discloses switch change device and system, the device includes the portal crane, and the portal crane further includes: a cross beam; the sliding frames are respectively and movably arranged at the left end and the right end of the cross beam, and can transversely move along the cross beam so as to adjust the transverse span of the gantry crane; the lifting mechanism is arranged on the cross beam and between the two sliding frames and can transversely move along the cross beam so as to adjust the lifting position of the turnout; the support legs are respectively arranged below the two sliding frames and can stretch out and draw back along the vertical direction so as to adjust the height of the cross beam from the roadbed. In the working state, a plurality of gantry cranes are arranged at intervals along the railway line direction and are spanned on roadbeds at two sides of the steel rail. The application can solve the technical problems that the operation safety of the existing turnout replacement equipment is low, and large-size turnout components cannot be lifted.

However, the above-mentioned

prior arts

1 and 2 each have technical drawbacks in terms of:

1) The door crane retraction mechanism has a complex structure, and the retraction operation comprises the steps of lifting, rotating, clamping and the like, so that the operation is inconvenient and the time consumption is long;

2) The gantry crane is complex in structure, the gantry crane can be placed on the flatcar only by rotating the gantry crane without exceeding the limit for transportation, and the gantry crane supporting legs comprise two-stage lifting structures, so that the cost is greatly increased;

3) The gantry crane needs to be rotated and longitudinally arranged, and can only put about 4 vehicles due to the longer length, so that the gantry crane transportation capacity of a single flat car is limited.

Disclosure of Invention

In view of the above, the present application aims to provide a method for replacing a large rail member of a track, so as to solve the technical problems of complicated structure and operation, high cost and limited space utilization of the existing large rail member replacing equipment.

In order to achieve the above purpose, the present application specifically provides a technical implementation scheme of a rail large rail member paving operation method, which includes the following steps:

s1) a plurality of door hanging devices are transversely placed on a first transportation flat car in a folded state, new rail large rail pieces are placed on a second transportation flat car, and the first transportation flat car, the second transportation flat car and the rail car are combined and hung to run to a designated position of a replacement operation site;

s2) clamping and overturning the door hanging devices one by one through a retracting device with a turnover structure, and simultaneously detaching the door hanging devices from the first transportation flatcar according to the position and the sequence after the door hanging devices recover to an unfolding state and placing the door hanging devices at a specified position;

S3) unloading a new rail large rail part from the second transportation flat car through a group crane consisting of a plurality of door hanging devices and placing the new rail large rail part on one side of a line below the door hanging devices;

s4) hoisting the detached large rail piece of the old rail to the other side of the line below the door hoisting device through a group crane;

s5) hoisting the new rail large rail piece to the position of the original rail large rail piece on the line through a group crane so as to complete replacement of the new and old rail large rail pieces;

s6) after the line is recovered, lifting the old rail large rail part by a group crane, driving in the second transportation flat car, and placing the old rail large rail part on the second transportation flat car;

s7) clamping and overturning the gantry crane devices on the line one by one through the retraction device, recovering the folding state, and then recovering the gantry crane devices to the first transportation flatcar;

s8) the door hanging device is transversely placed on a first transport flat car in a folded state, and the first transport flat car, the second transport flat car and the rail car are separated from the group.

Further, two longitudinally moving guide rails are arranged on the first transportation flatcar in parallel along the longitudinal direction, and a power device is arranged between the two longitudinally moving guide rails and can provide operation power for the retraction device.

Further, in the step S2), in the placing operation state, the gantry crane is transported to a designated position through a longitudinally moving guide rail provided on the first transportation flatcar, and is clamped and turned by the retraction device, and the gantry crane is placed on the line after being extended to a normal state.

Further, the door hanging device includes: the device comprises a cross beam, a transverse sliding frame, a lifting mechanism, a hanging chain and supporting legs; the beam further comprises a main beam, and folding arms are hinged to the left side and the right side of the main beam. The left end and the right end of the cross beam are respectively and movably provided with a transverse sliding frame, and the transverse sliding frames can transversely move along the cross beam so as to adjust the transverse span of the door hanging device. And a lifting mechanism is arranged on the cross beam between the two transverse sliding frames and can transversely move along the cross beam so as to adjust the transverse lifting position of the large rail piece of the track. And connecting the hanging chain with a lifting mechanism for lifting the large rail piece of the track. The landing legs are respectively arranged below the two transverse sliding frames, can stretch and retract along the vertical direction to adjust the height of the cross beam from the horizontal plane of the line, and simultaneously realize the leveling of the door hanging device.

Further, the transverse sliding frame is sleeved outside the cross beam, one end of the folding driving mechanism is hinged with the main beam, and the other end of the folding driving mechanism is hinged with the folding arm. When the folding and unfolding device is used for placing the door hanging device, the folding driving mechanism drives the folding arm to unfold relative to the main beam, and the transverse sliding frame moves towards the outer side of the cross beam so as to increase the transverse span of the door hanging device. When the folding and unfolding device is used for recycling the door hanging device, the folding driving mechanism drives the folding arm to shrink relative to the main beam, and the transverse sliding frame moves towards the inner side of the cross beam so as to reduce the overall width of the door hanging device.

Further, the retraction device includes: the device comprises a base, a roll-over stand, a roll-over driving mechanism, a clamping mechanism and a connecting rod; and fixing the base on the vehicle body of the first transportation flat vehicle or the second transportation flat vehicle. One end of the roll-over stand is hinged with the base, the other end of the roll-over stand extends upwards and is hinged with the clamping mechanism, and the clamping mechanism can clamp the large rail piece of the track. One end of the overturning driving mechanism is hinged with the base, and the other end of the overturning driving mechanism is hinged with the overturning frame. One end of the connecting rod is hinged with the clamping mechanism, and the other end of the connecting rod is hinged with the base. The turnover frame, the base, the turnover frame clamping mechanism and the connecting rod form a four-bar mechanism, and the turnover frame can perform turnover motion relative to the base along the front and back directions under the drive of the turnover driving mechanism.

Further, the support legs comprise main support legs, supports and leveling support legs, the main support legs are arranged below the two transverse sliding frames, the supports are fixed below the main support legs, and the leveling support legs are arranged on the left side and the right side of the supports. The leveling landing leg further comprises a sleeve and telescopic rods, the sleeve is fixed on the left side and the right side of the support, the telescopic rods are arranged in the sleeve, and the telescopic rods can perform telescopic motion relative to the sleeve.

Further, in the transportation state of the steps S1) and S8), the door hanging device is fixed on the longitudinally moving guide rail at intervals along the longitudinal direction so as to adapt to the vehicle limit. And under the placing operation state of the step S2), the previous door hanging device is arranged, and the next door hanging device is conveyed to a designated position through the longitudinal moving guide rail and is clamped and turned over by the retraction device. And under the recovery operation state of the step S7), the previous door hanging device is recovered, the longitudinal moving guide rail moves and leaves a position, and the next door hanging device is clamped and overturned through the retraction device and placed at a designated position to be recovered through the longitudinal moving guide rail.

Further, in the placing operation state of the step S2), after the retraction device clamps and overturns the first door hanger to a position above the placing position, the supporting legs of the door hanger move to two sides of the cross beam, the leveling supporting legs extend downwards to be close to the ground, the clamping mechanism of the retraction device is loosened, and each leveling supporting leg extends to level the door hanger. And the first transportation flatcar moves forwards, and the door hanging device placing action is repeated until all the door hanging devices are placed at the designated positions and leveled.

Further, in the recycling operation state in the step S7), the old rail member is lifted by the group crane, the second transportation flat car is driven in the opposite direction, and after the group crane places the old rail member on the second transportation flat car, the hanging chain of the door hanging device is loosened. The marshalling continues to travel in the opposite direction, and the door hanging devices are recovered to the first transportation flatcar one by one through the retraction device. In the step S8), after all the gantry cranes are recovered, all the equipment is fixed on the first transportation flatcar and the second transportation flatcar, and the equipment is separated from the first transportation flatcar and the second transportation flatcar to finish the paving operation.

Further, in the paving operation state of the steps S3) to S6), the hanging chain of the door hanging device hangs the new rail member, the new rail member is lifted, and the second transportation flat car continues to move forward until the second transportation flat car leaves the operation area. The new rail large rail piece is transversely moved to one side close to the supporting leg through the group crane to be stably placed, the old rail large rail piece is lifted, transversely moved and placed on the other side, and then the new rail large rail piece is lifted and placed at the position of the original old rail large rail piece, so that the replacement of the new and old rail large rail pieces is completed.

By implementing the technical scheme of the rail large rail part paving operation method provided by the application, the rail large rail part paving operation method has the following beneficial effects:

(1) According to the rail large-rail part paving and replacing operation method, the structure of the door hanger retraction device is simplified, the original lifting, rotating and clamping retraction mechanism is changed into a turnover type retraction structure and is used for placing and recycling the door hanger device, lifting and rotating operations are not needed when the door hanger device is retracted and released, turnover type retraction can be directly carried out, the operation time is shorter, and the operation is more convenient;

(2) According to the rail large-rail part paving and replacing operation method, the structure of the door hanging device is simplified, the cross beam adopts a three-section folding arm structure, and the door hanging device can be placed on the flat car without rotating, so that the transportation process is not beyond limit; meanwhile, the landing leg of the door hanging device only needs to adopt a primary lifting structure for leveling, so that the operation flow is further simplified, and the cost is greatly reduced;

(3) According to the rail large-rail part paving and replacing operation method, as the gantry crane device adopts the beam structure of the three-section folding arm, and the folding and unfolding device adopts the turnover type folding and unfolding structure, the transportation capacity of the gantry crane device of a single flat car is greatly improved; because the door hanging device of original structure adopts the rotation back to vertically place, and because length is longer, single car can only place about 4 door hanging device, and this application is because adopting the door hanging device transversely to place, and single car can place the door hanging device more than 6.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will make a brief introduction to the drawings used in the description of the embodiments or the prior art. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other embodiments may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of the front structure of a door lifting device in an embodiment of a rail track-laying work system on which the method of the present application is based;

FIG. 2 is a schematic top view of a door lifting device in one embodiment of a rail track-laying work system on which the method of the present application is based;

FIG. 3 is a schematic side view of a door lifting device in an embodiment of a rail track-laying work system on which the method of the present application is based;

FIG. 4 is a schematic diagram of a front view of a door lifting device in a folded state in an embodiment of a rail track-laying work system on which the method of the present application is based;

FIG. 5 is a schematic top view of a door lifting device in a folded state in an embodiment of a rail track-laying work system on which the method of the present application is based;

FIG. 6 is a schematic side view of a door lifting device in a folded state in an embodiment of a rail track-laying work system on which the method of the present application is based;

FIG. 7 is a schematic perspective view of a door lifting device in an embodiment of a rail track-laying work system on which the method of the present application is based;

FIG. 8 is a schematic side view of a mounting structure of a retraction device in one embodiment of a rail track replacement work system on which the method of the present application is based;

FIG. 9 is a schematic top view of a mounting structure of a specific embodiment retraction device of a rail track replacement work system on which the method of the present application is based;

FIG. 10 is a schematic elevation view of the mounting structure of a retraction device in one embodiment of a rail track replacement work system upon which the method of the present application is based;

FIG. 11 is a schematic side view of a retraction device in an embodiment of a rail track replacement system according to the method of the present application;

FIG. 12 is a schematic side view of a track-wide rail-paving operation system according to an embodiment of the present application in an operational state;

FIG. 13 is a schematic top view of a track rail paving operation system according to an embodiment of the present disclosure in an operational state of a retraction device;

FIG. 14 is a schematic elevational view of a track-wide rail-member-paving operation system in which the method of the present application is based, in an operational state, of a retraction device in an exemplary embodiment;

FIG. 15 is a schematic perspective view of a retraction device in an operational state of an embodiment of a rail track replacement work system according to the method of the present application;

FIG. 16 is a schematic perspective view of an operation state of the retraction device in another view angle of an embodiment of a rail track replacement operation system according to the method of the present application;

FIG. 17 is a schematic perspective view of an operation state of the retraction device in a third view angle of an embodiment of a rail track-laying operation system according to the method of the present application;

FIG. 18 is a schematic side view of a retraction device of an embodiment of a rail track work system upon which the method of the present application is based;

FIG. 19 is a schematic top view of a retraction device of an embodiment of a rail track work system on which the method of the present application is based;

FIG. 20 is a schematic view of the operation principle of a retraction device of an embodiment of a rail track-laying operation system in view angle A direction according to the method of the present application;

FIG. 21 is a schematic view of the working principle of a retraction device of an embodiment of a rail track-laying work system in view B direction according to the method of the present application;

FIG. 22 is a schematic view of the working principle of a retraction device of an embodiment of a rail track-laying work system in view C direction according to the method of the present application;

FIG. 23 is a schematic front view of a construction of one embodiment of a method of track rail replacement work in a shipping state, in accordance with the present application;

FIG. 24 is a schematic top view of a construction of one embodiment of a method of track rail replacement work in a shipping state, in accordance with the present application;

FIG. 25 is a schematic front view of a construction of a specific embodiment of a method of track rail replacement work in a working state of a retraction device according to the present application;

FIG. 26 is a schematic top view of a construction of one embodiment of a method of track rail replacement work in a working condition of a retraction device according to the present application;

FIG. 27 is a schematic view of the working status of the retraction device according to one embodiment of the track rail paving method of the present application;

FIG. 28 is a schematic view of the working state of the retraction device at another view angle according to one embodiment of the track rail paving method of the present application;

FIG. 29 is a schematic view of the working status of the retraction device at a third perspective according to one embodiment of the track rail paving method according to the present application;

FIG. 30 is a schematic front view of a construction of one embodiment of a method of track rail replacement work in a gantry crane in a deployed condition, in accordance with the present application;

FIG. 31 is a schematic top view of a construction of one embodiment of a method of track rail replacement work in accordance with the present application in a gantry crane set-up condition;

FIG. 32 is a schematic front view of a construction of one embodiment of a method of track rail replacement work in a new track rail unloading work state, in accordance with the present application;

FIG. 33 is a schematic top view of a construction of one embodiment of a method of track rail replacement operation in a new track rail unloading operation;

FIG. 34 is a schematic top view of a construction of one embodiment of a method of track rail replacement operation in a new track rail replacement operation state, in accordance with the present application;

FIG. 35 is a schematic view of a recycling operation of a gantry crane according to one embodiment of the present application track rail paving operation method;

FIG. 36 is a schematic view of a door hanger recovery operation at another perspective based on one embodiment of the track rail paving operation method of the present application;

FIG. 37 is a schematic view of a door hanger recycling operation at a third perspective based on one embodiment of the track rail paving operation method of the present application;

In the figure: 1-door hanging device, 2-retraction device, 3-first transportation flatcar, 4-second transportation flatcar, 5-railcar, 6-power device, 7-track big rail piece, 71-new track big rail piece, 72-old track big rail piece, 8-longitudinal moving guide rail, 9-track, 101-girder, 102-folding arm, 103-main landing leg, 104-sleeve, 105-telescopic link, 106-lifting mechanism, 107-sideslip sliding frame, 108-hanging chain, 109-folding driving mechanism, 110-support, 201-roll-over stand, 202-base, 203-roll-over driving mechanism, 204-clamping mechanism, 205-connecting rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.

Specific embodiments of the rail track member paving method of the present application are shown in fig. 1 to 37, and the present application will be further described with reference to the drawings and the specific embodiments.

Example 1

As shown in fig. 1 to 22, an embodiment of a track-rail-member-paving operation system according to the present application specifically includes:

the method comprises the steps of grouping the connected rail cars 5, the first transport flat car 3 and the second transport flat car 4;

in the transport state, the door hanging devices 1 are transversely arranged on the first transport flat car 3 (in the direction shown by T in the figures 9 and 13) in a folded state, and not less than two door hanging devices are arranged on the first transport flat car;

the collecting and releasing device 2 which is arranged on the first transportation flat car 3 or the second transportation flat car 4 and can realize the placement or recovery of the door hanging device 1, such as: in the present embodiment, the retraction device 2 is specifically disposed on one side of the first transportation flat car 3 in the longitudinal direction (the direction L shown in fig. 8 and 9), and is disposed close to the second transportation flat car 4.

Two longitudinally moving guide rails 8 are arranged on the first transportation flatcar 3 in parallel with each other along the longitudinal direction, a power device 6 is also arranged between the two longitudinally moving guide rails 8, and the power device 6 can provide operation power for the retraction device 2. Among them, the power unit 6 may be of different types: the actuator can be driven by a battery or a generator, and can be driven by electricity or hydraulic pressure. Each group of folding door hanging devices 1 adopts an independent driving mode or a centralized and unified power driving mode. In the state of the door hanger placing operation, the door hanger 1 is conveyed to a designated position through a longitudinal moving guide rail 8 arranged on the first transportation flatcar 3, is clamped and turned over by the retraction device 2, and is placed on a line after the door hanger 1 is extended to a normal state.

As shown in fig. 1 to 7, the door hanger 1 further includes:

the cross beam further comprises a main beam 101 and folding arms 102 hinged to the left side and the right side of the main beam 101 respectively;

the transverse sliding frames 107 are movably arranged at the left end and the right end of the cross beam, and the transverse sliding frames 107 can move along the transverse direction of the cross beam (the direction shown as W in figure 7) so as to adjust the transverse span of the door hanging device 1;

the lifting mechanism 106 is arranged on the cross beam and between the two transverse sliding frames 107 and can transversely move along the cross beam so as to adjust the transverse lifting position of the large rail piece 7;

a hanging chain 108 connected with the lifting mechanism 106 and used for lifting the large rail piece 7 of the track;

the supporting legs are respectively arranged below the two transverse sliding frames 107 and can stretch and retract along the vertical direction (the direction shown as H in fig. 7) so as to adjust the height of the cross beam from the horizontal plane of the line and realize the leveling of the door hanging device 1.

The transverse sliding frame 107 is sleeved outside the cross beam, and a folding driving mechanism 109 is hinged between the main beam 101 and the folding arm 102. When the folding and unfolding device 2 is used for placing the gantry crane 1, the folding driving mechanism 109 can drive the folding arm 102 to unfold relative to the main beam 101, and the transverse sliding frame 107 moves towards the outer side of the cross beam, so that the transverse span of the gantry crane 1 is increased, and the working application range is expanded. When the retraction device 2 is used for retracting the door hanging device 1, the folding driving mechanism 109 can drive the folding arm 102 to retract relative to the main beam 101 so as to reduce the overall width of the door hanging device 1, and avoid oversupposition in the transportation process of the door hanging device 1. The door hanger 1 is shown in an unfolded state in fig. 1 to 3, and the door hanger 1 is shown in a folded state in fig. 4 to 7.

As an exemplary embodiment of the present application, the beam may further specifically employ, for example: the transverse beam and the transverse sliding frame 107 can specifically adopt a structure of combining a guide rail and a sliding sleeve, and the transverse sliding frame 107 is driven to move along the length direction (the direction shown as W in figure 7) of the transverse beam through an oil cylinder, an electric cylinder or an electric screw rod and other structures. The lifting mechanism 106 may employ a hoist or other spreader. The supporting legs can stretch and slide on the cross beam to adjust the span and the height of the folding door lifting device 1 so as to adapt to different field conditions and the replacement of the large rail pieces 7 with different sizes.

The support legs further comprise a main support leg 103 arranged below the two traverse sliding frames 106, a bracket 110 fixed below the main support leg 103, and leveling support legs arranged on the left side and the right side of the bracket 110. The leveling leg further comprises a sleeve 104 fixed on the left and right sides of the bracket 110, and a telescopic rod 105 arranged inside the sleeve 104 and capable of performing telescopic movement relative to the sleeve 104. The lower part of each side of the supporting leg is provided with two telescopic leveling supporting legs so as to level the door hanging device 1, and the telescopic operation of the door hanging device can be realized by adopting the structural modes of an oil cylinder, an electric cylinder or an electric screw rod and the like.

The door hanging device 1 described in embodiment 1 solves the technical problems of large size, easy exceeding railway limit, high cost, long skylight occupation time, low operation efficiency and low safety of the existing operation equipment, the structure is simplified, the cross beam adopts a three-section folding arm structure, and the door hanging device 1 can be placed on a transportation flat car without rotating so as to realize the transportation process without exceeding limit. Meanwhile, the landing leg of the door hanging device 1 only needs to adopt a primary lifting structure for leveling, so that the operation flow is further simplified, and the cost is greatly reduced.

As shown in fig. 8 to 11, the retraction device 2 further includes:

a base 202 fixed to the body of the first transportation flat car 3 or the second transportation flat car 4;

a roll-over stand 201 having one end hinged to the base 202 and the other end extending upward;

a roll-over driving mechanism 203 hinged between the base 202 and the roll-over stand 201;

a clamping mechanism 204 hinged to the top of the roll-over stand 201 for clamping the large rail 7;

and a link 205 hinged between the clamping mechanism 204 and the base 202.

The roll-over stand 201, the base 202, the roll-over stand clamping mechanism 204 and the connecting rod 205 further form a four-bar mechanism, and the roll-over stand 201 can perform roll-over motion relative to the base 202 along the front-back direction (the direction shown as F in fig. 8 and 11) under the drive of the roll-over driving mechanism 203.

The retraction device 2 is used for unloading the door hanger 1 from the first transportation flat car 3 to the line and recovering the door hanger from the line to the first transportation flat car 3. The folding door lifting device 1 can be quickly placed on a line by the folding and unfolding device 2, and can be quickly recovered from the line to a transportation flat car. The door hanger 1 is fixed to the first transportation flat car 3 at intervals in the longitudinal direction (direction L shown in fig. 12 and 13) in the transportation state to accommodate the vehicle limitation.

As an exemplary embodiment of the present application, the working system includes more than one second transportation flat car 4, and the second transportation flat car 4 is provided with a rail member 7. The rail car 5, the first transport flat car 3 and the second transport flat car 4 are sequentially connected, and 6-8 door hanging devices 1 are placed on the first transport flat car 3. The transportation of the rail large rail piece paving operation system adopts a first transportation flat car 3 of a rail car 5 and a loading gantry crane device 1 and a second transportation flat car 4 of a transportation rail large rail piece 7 to carry out grouping and hanging operation, one refitted transportation flat car is used for transporting a plurality of folding gantry cranes 1, and two common transportation flat cars are used for transporting new and old rail large rail pieces.

The rail large rail part paving and replacing operation system adopts a mode that a plurality of (generally 6-8) folding door lifting devices 1 are combined into a group crane, the supporting legs of the rail large rail part paving and replacing operation system are telescopic and can slide on the cross beam, and the span and the height of the folding door lifting devices 1 are adjusted so as to adapt to different field conditions and the replacement of rail large rail parts 7 with different sizes. Four telescopic leveling support legs are arranged at the lower part of each side of the support leg to level the door hanging device 1, and the telescopic operation is realized by adopting an oil cylinder or an electric screw rod and the like. The lifting mechanism 106 may further employ a hoist or other spreader.

As shown in fig. 12 to 14, the door hanger 1 is fixed to the longitudinally moving rail 8 at intervals in the longitudinal direction in the transport state to accommodate vehicle restrictions. The operation state of the retraction device 2 includes a placement operation state and a retraction operation state of the gantry crane 1. As shown in fig. 15 to 17, in the state of the gantry crane placement operation, the previous gantry crane 1 is placed, and the next gantry crane 1 is transported to a designated position by the longitudinal rail 8 and is held and turned by the retraction device 2. In the door hanger recovery operation state, the previous door hanger 1 is recovered, the longitudinal moving guide rail 8 moves and leaves the position, and the next door hanger 1 is clamped, turned over and placed at the designated position by the collecting and releasing device 2 and recovered by the longitudinal moving guide rail 8. It should be noted that, as shown in fig. 18 to 20, the operation principle of the retraction device 2 is only illustrated for convenience, and it does not mean that the retraction device 2 is disposed on both sides of the first transportation flat car 3 in the longitudinal direction.

The second transportation flat carriage 4 is provided with the large rail member 7, the new large rail member 71 is transported to the operation site by the second transportation flat carriage 4, and the door hanging device 1 is detached from the first transportation flat carriage 3 one by the retracting device 2 according to the position and the sequence and is placed at the appointed position. Then, the new rail piece 71 is unloaded from the second transportation flat car 4 by the group crane composed of the plurality of gantry cranes 1 and placed on the line side below the gantry crane 1. The detached old rail pieces 72 are hoisted to the other side of the line below the door hanger 1 by the group crane. And then the new rail large rail piece 71 is hoisted to the position of the old rail large rail piece 72 on the line by the group crane so as to complete the replacement of the new and old rail large rail pieces. After the line is restored, the old rail large rail piece 72 is lifted by the group crane, the second transportation flat car 4 is driven in, the old rail large rail piece 72 is placed on the second transportation flat car 4, and the gantry crane 1 on the line is withdrawn to the first transportation flat car 3 one by the retraction device 2, so that the marshalling is driven off.

As shown in fig. 21, in the state of the gantry crane placing operation, after the first gantry crane 1 is clamped and turned over to the place by the retraction device 2, the legs of the gantry crane 1 move to both sides of the cross beam, the leveling legs extend downward to be close to the ground, the clamping mechanism 204 of the retraction device 2 is released, and each leveling leg extends to level the gantry crane 1. The first transportation flatcar 3 moves forward, and the above-described placing operation of the gantry crane 1 is repeated until all the gantry cranes 1 are placed at the specified positions and leveled.

In the door hanger recovery operation state, the old rail piece 72 is lifted by the cluster crane, the second transportation flat car 4 is driven in the opposite direction (i.e., the opposite direction to the direction L shown in fig. 23, 24, 25, 26, 30 and 31), and after the cluster crane places the old rail piece 72 on the second transportation flat car 4, the hoist chain 108 of the door hanger 1 is released. The marshalling continues to travel in the opposite direction, and the gantry crane 1 is recovered one by one to the first transportation flatcar 3 through the retraction device 2, as shown in fig. 22. After all the door hanging devices 1 are recovered, all the equipment is fixed on the first transport flat car 3 and the second transport flat car 4, and the equipment is separated in a grouping way, so that the paving operation is completed.

In the rail piece laying operation state, the hoist chain 108 of the door hoist device 1 hangs the new rail piece 71, and lifts the new rail piece 71, and the second transportation flat carriage 4 continues to move forward until it leaves the operation area. The new rail large rail piece 71 is transversely moved to one side close to the supporting leg by the group crane to be stably placed, the old rail large rail piece 72 is hoisted, transversely moved and placed on the other side, and then the new rail large rail piece 71 is hoisted and placed at the position of the original old rail large rail piece 72, so that the replacement of the new and old rail large rail pieces is completed.

Example 2

In this embodiment, other auxiliary procedures such as confirming the supporting point of the door hanging device, leveling the supporting point, disassembling the rail fastener, cutting, welding and polishing the rail, leveling and the like are omitted, and the main procedure of the rail large rail member paving operation method of the present application will be described in detail below by taking a fork center (a typical rail large rail member 7) as an example.

23-37, an embodiment of a track rail paving method of the present application based on the system of example 1, specifically includes the following steps:

s1) as shown in fig. 23 and 24, several (e.g.: 6-8) door hanging devices 1 are transversely placed on longitudinal moving guide rails 8 of a first transportation flat car 3 (a modified flat car is adopted) in a folding state (so as to adapt to vehicle limit), new rail large rail pieces 71 are placed on two second transportation flat cars 4 (common flat cars are adopted), and the first transportation flat car 3, the second transportation flat cars 4 and the rail cars 5 are in marshalling connection and running to a designated position of a replacement operation site;

S2) as shown in fig. 25 to 29, the vehicle group runs in the direction of L, the door hanging devices 1 are clamped and turned one by the folding and unfolding devices 2 with a turning-over structure, and meanwhile, the door hanging devices 1 are detached from the first transportation flat car 3 according to the position and the sequence after being restored to the unfolded state and are placed at the designated position as shown in fig. 30 and 31;

s3) unloading a new track rail 71 from the second transportation flat car 4 by a group crane composed of a plurality of gantry cranes 1 and placing it on the line side below the gantry cranes 1 as shown in fig. 32 and 33;

s4) as shown in fig. 34, the detached old rail large rail piece 72 is hoisted to the other side of the line below the door hoisting device 1 by group hoisting;

s5) hoisting the new rail large rail piece 71 to the position of the original rail large rail piece 72 on the line by group hoisting so as to complete replacement of the new and old rail large rail pieces;

s6) after the line is restored, the old rail piece 72 is lifted by the group crane, the second transportation flat car 4 is driven in the direction opposite to the direction L shown in the attached drawings 23, 24, 25, 26, 30 and 31, and after the old rail piece 72 is placed on the second transportation flat car 4 by the group crane, the hanging chain clamp of the door hanging device 1 is released;

s7) the vehicle marshalling continues to run in the direction opposite to the direction L, the door hanging devices 1 on the line are clamped and turned one by one through the retraction device 2, and the door hanging devices are recovered to the first transportation flat car 3 after the folding state is recovered, as shown in the figures 35 to 37;

S8) after the door hanging device 1 is recovered, the door hanging device is transversely placed on the first transportation flat car 3 in a folded state, all equipment is fixed on the transportation flat car, the first transportation flat car 3, the second transportation flat car 4 and the rail car 5 are driven away from the direction shown by the marshalling direction L, and the paving operation is completed.

Wherein, on the first transportation flatcar 3 along the longitudinal direction parallel to each other set up two and indulge and move the guide rail 8, set up power device 6 between two indulge and move the guide rail 8, power device 6 can provide the operation power for the winding and unwinding devices 2.

In step S2), in the state of the door hanger placement operation, the door hanger 1 is transported to a designated position by the longitudinal moving rail 8 provided on the first transport flat car 3, is held and turned by the retraction device 2, and is placed on the line after the door hanger 1 is extended to the normal state.

The door hanger 1 further includes: the cross beam, the sideslip sliding frame 107, the lifting mechanism 106, the hanging chains 108 and the supporting legs. The cross beam further comprises a main beam 101, and folding arms 102 are hinged on the left side and the right side of the main beam 101. The transverse sliding frames 107 are movably arranged at the left and right ends of the cross beam 101, and the transverse sliding frames 107 can move transversely along the cross beam so as to adjust the transverse span of the door hanging device 1. A hoisting mechanism 106 is arranged on the cross beam between the two transverse sliding frames 107, and the hoisting mechanism 106 can move transversely along the cross beam so as to adjust the transverse hoisting position of the large rail piece 7. A hoist chain 108 is connected to the hoisting mechanism 106 for hoisting the rail member 7. The supporting legs are respectively arranged below the two transverse sliding frames 107, and can stretch and retract along the vertical direction to adjust the height of the cross beam from the horizontal plane of the line, and meanwhile, the leveling of the door hanging device 1 is realized.

The transverse sliding frame 107 is sleeved outside the cross beam, one end of the folding driving mechanism 109 is hinged with the main beam 101, and the other end is hinged with the folding arm 102. When the folding and unfolding apparatus 2 is used for placing the door hanging apparatus 1, the folding driving mechanism 109 drives the folding arm 102 to be unfolded relative to the main beam 101, and the traverse sliding frame 107 moves towards the outer side of the cross beam so as to increase the transverse span of the door hanging apparatus 1. When the folding and unfolding apparatus 2 is used for folding and unfolding the door hanging apparatus 1, the folding driving mechanism 109 drives the folding arm 102 to retract relative to the main beam 101, and the traverse sliding frame 107 moves towards the inner side of the cross beam so as to reduce the whole width of the door hanging apparatus 1.

The retraction device 2 further comprises: roll-over stand 201, base 202, roll-over driving mechanism 203, clamping mechanism 204, and link 205. The base 202 is fixed to the body of the first transportation flat car 3 or the second transportation flat car 4. One end of the roll-over stand 201 is hinged with the base 202, and the other end extends upwards and is hinged with the clamping mechanism 204, and the clamping mechanism 204 can clamp the large rail piece 7. One end of the turn-over driving mechanism 203 is hinged with the base 202, and the other end is hinged with the turn-over stand 201. One end of the link 205 is hinged to the clamping mechanism 204, and the other end is hinged to the base 202. The roll-over stand 201, the base 202, the clamping mechanism 204 and the connecting rod 205 form a four-bar mechanism, and the roll-over stand 201 can perform roll-over motion relative to the base 202 along the front-back direction under the drive of the roll-over driving mechanism 203.

The support legs further comprise main support legs 103, a support 110 and leveling support legs, wherein the main support legs 103 are arranged below the two transverse sliding frames 107, the support 110 is fixed below the main support legs 103, and the leveling support legs are arranged on the left side and the right side of the support 110. The leveling leg further includes a sleeve 104 and a telescopic rod 105, the sleeve 104 is fixed on the left and right sides of the bracket 110, the telescopic rod 105 is arranged in the sleeve 104, and the telescopic rod 105 can perform telescopic movement relative to the sleeve 104.

In the transport state of steps S1) and S8), the door hanger 1 is fixed to the longitudinally moving rail 8 at intervals in the longitudinal direction to accommodate vehicle restrictions. In the state of the gantry crane placement operation of step S2), the placement of the previous gantry crane 1 is completed, and the next gantry crane 1 is transported to a designated position through the longitudinal moving rail 8 and is clamped and turned by the retraction device 2. In the door hanger recovery operation state of step S7), the previous door hanger 1 is recovered, the longitudinal rail 8 is moved to a position, and the next door hanger 1 is held by the retraction device 2, turned over, and placed at a specified position to be recovered by the longitudinal rail 8.

In the state of the gantry crane placement operation in step S2), after the retraction device 2 clamps and turns the first gantry crane 1 to a position above the placement position, the legs of the gantry crane 1 move to both sides of the cross beam, the leveling legs extend downward to be close to the ground, the clamping mechanism 204 of the retraction device 2 is released, and each leveling leg extends to level the gantry crane 1. The first transportation flatcar 3 moves forward, and the above-described door hanger 1 placement operation is repeated until all door hangers 1 are placed at the specified positions and leveled.

In the door hanger recovery operation state of step S7), the old rail pieces 72 are lifted by the group crane, the second transportation flat car 4 is driven in the opposite direction (i.e., the opposite direction to the direction indicated by L in fig. 23, 24, 25, 26, 30 and 31), and after the group crane places the old rail pieces 72 on the second transportation flat car 4, the hoist chain 108 of the door hanger 1 is released. The vehicle group continues to travel in the opposite direction, and the gantry crane 1 is recovered one by one to the first transportation flatcar 3 by the retraction device 2.

In the rail piece laying operation state of steps S3) to S6), the hoist chain 108 of the door hoist 1 suspends the new rail piece 71, lifts the new rail piece 71, and the second transport flat carriage 4 continues to move forward until it leaves the operation area. The new rail large rail piece 71 is transversely moved to one side close to the supporting leg by the group crane to be stably placed, the old rail large rail piece 72 is hoisted, transversely moved and placed on the other side, and then the new rail large rail piece 71 is hoisted and placed at the position of the original old rail large rail piece 72, so that the replacement of the new and old rail large rail pieces is completed.

The method for replacing the large rail piece of the track described in embodiment 2 can solve the technical problems of large deformation, large swing, low operation efficiency, long skylight occupation time and the like in the field hoisting and replacing operation of the large rail piece of the track, and the large rail piece of the track is replaced by adopting the door hanging device 1 with a plurality of folding structures to simultaneously hoist and replace the large rail piece of the track, so that the structure is simple, the space is saved, the operation is simple and convenient, the whole system is low in cost, operators are few, and the skylight occupation time is greatly reduced.

In the description of the present application, it will be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" is two or more, unless explicitly defined otherwise.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the scope of the present disclosure, since any structural modifications, proportional changes, or dimensional adjustments made by those skilled in the art should not be made in the present disclosure without affecting the efficacy or achievement of the present disclosure.

By implementing the technical scheme of the rail large rail part paving operation method described in the specific embodiment of the application, the following technical effects can be achieved:

(1) According to the track rail piece paving operation method, the structure of the gantry crane retraction device is simplified, the original lifting, rotating and clamping retraction mechanism is changed into a turnover type retraction structure for placing and recycling the gantry crane, lifting and rotating operations are not needed when the gantry crane is retracted and released, turnover type retraction can be directly carried out, a plurality of folding gantry cranes are adopted to lift and replace the track rail piece, required operators are fewer, the operation time is shorter, and the flow is simpler, clearer and more convenient;

(2) According to the rail large-rail part paving operation method, the structure of the door hanging device is simplified, the folding cross beam adopts a three-section folding arm structure, and is transversely arranged on a flat car during transportation, and the door hanging device can be placed on the flat car without rotating, so that the transportation process is not beyond limit; meanwhile, the landing leg of the door hanging device only needs to adopt a primary lifting structure for leveling, so that the operation flow is further simplified, and the cost is greatly reduced; the plurality of door hanging devices form group hanging operation, so that the large rail piece of the rail is positioned more accurately, and the paving operation is safer and more reliable;

(3) According to the rail large-rail part paving operation method, as the gantry crane device adopts the beam structure of the three-section folding arm, and the folding and unfolding device adopts the turnover type folding and unfolding structure, the transportation capacity of the gantry crane device of a single flat car is greatly improved; because the door hanging device of original structure adopts the rotation back to vertically place, and because length is longer, single car can only place about 4 door hanging device, and this application is because adopting the door hanging device transversely to place, and single car can place the door hanging device more than 6.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are referred to each other.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the present application in any way. While the present application has been described with reference to preferred embodiments, it is not intended to be limiting. Any person skilled in the art may make many possible variations and modifications to the technical solution of the present application, or equivalent embodiments with equivalent variations, using the methods and technical solutions disclosed above, without departing from the spirit and technical solutions of the present application. Therefore, any simple modification, equivalent substitution, equivalent variation and modification of the above embodiments according to the technical substance of the present application, which do not depart from the content of the technical solution of the present application, still fall within the scope of protection of the technical solution of the present application.

Claims

1. The rail large rail piece paving operation method is characterized by comprising the following steps of:

2. The method of track rail replacement work of claim 1, wherein: two longitudinally moving guide rails are arranged on the first transportation flatcar in parallel along the longitudinal direction, and a power device is arranged between the two longitudinally moving guide rails and can provide operation power for the retraction device.

3. The method of track rail replacement work of claim 2, wherein: in the step S2), in the placing operation state, the gantry crane is conveyed to a designated position through a longitudinally moving guide rail arranged on the first transportation flatcar, is clamped and turned by the retraction device, and is placed on a line after being extended to a normal state.

4. A method of rail track-laying work according to claim 2 or 3, wherein the gantry crane apparatus comprises: the device comprises a cross beam, a transverse sliding frame, a lifting mechanism, a hanging chain and supporting legs; the beam further comprises a main beam, and folding arms are hinged to the left side and the right side of the main beam; the left end and the right end of the cross beam are respectively and movably provided with a transverse sliding frame, and the transverse sliding frames can transversely move along the cross beam so as to adjust the transverse span of the door hanging device; a lifting mechanism is arranged on the cross beam between the two transverse sliding frames and can transversely move along the cross beam so as to adjust the transverse lifting position of the large rail piece of the track; the hanging chain is connected with a lifting mechanism and is used for lifting a large rail piece of the track; the landing legs are respectively arranged below the two transversely-moving sliding frames, can stretch and retract along the vertical direction to adjust the height of the cross beam from the horizontal plane of the line, and meanwhile, the leveling of the door hanging device is realized.

5. The method of track rail replacement work of claim 4, wherein: sleeving the transverse sliding frame outside the cross beam, hinging one end of the folding driving mechanism with the main beam, and hinging the other end of the folding driving mechanism with the folding arm; when the folding and unfolding device is used for placing the door hanging device, the folding driving mechanism drives the folding arm to be unfolded relative to the main beam, and the transverse sliding frame moves towards the outer side of the cross beam so as to increase the transverse span of the door hanging device; when the folding and unfolding device is used for recycling the door hanging device, the folding driving mechanism drives the folding arm to shrink relative to the main beam, and the transverse sliding frame moves towards the inner side of the cross beam so as to reduce the overall width of the door hanging device.

6. The method of rail track-laying operation according to claim 2, 3 or 5, wherein the retraction device includes: the device comprises a base, a roll-over stand, a roll-over driving mechanism, a clamping mechanism and a connecting rod; fixing the base on a vehicle body of the first transport flat vehicle or the second transport flat vehicle; one end of the roll-over stand is hinged with the base, the other end of the roll-over stand extends upwards and is hinged with the clamping mechanism, and the clamping mechanism can clamp a rail part; one end of the overturning driving mechanism is hinged with the base, and the other end of the overturning driving mechanism is hinged with the overturning frame; one end of the connecting rod is hinged with the clamping mechanism, and the other end of the connecting rod is hinged with the base; the turnover frame, the base, the turnover frame clamping mechanism and the connecting rod form a four-bar mechanism, and the turnover frame can perform turnover motion relative to the base along the front and back directions under the drive of the turnover driving mechanism.

7. The method of track rail replacement work of claim 6, wherein: the support legs comprise main support legs, supports and leveling support legs, wherein the main support legs are arranged below the two transverse sliding frames, the supports are fixed below the main support legs, and the leveling support legs are arranged on the left side and the right side of the supports; the leveling landing leg further comprises a sleeve and telescopic rods, the sleeve is fixed on the left side and the right side of the support, the telescopic rods are arranged in the sleeve, and the telescopic rods can perform telescopic motion relative to the sleeve.

8. The track rail replacement work method of claim 2, 3, 5 or 7, wherein: in the transportation state of the step S1) and the step S8), the door hanging device is fixed on the longitudinally moving guide rail at intervals along the longitudinal direction so as to adapt to the vehicle limit; in the placing operation state of the step S2), the arrangement of the previous door hanging device is completed, and the next door hanging device is conveyed to a designated position through the longitudinal moving guide rail and is clamped and turned over by the retraction device; and under the recovery operation state of the step S7), the previous door hanging device is recovered, the longitudinal moving guide rail moves and leaves a position, and the next door hanging device is clamped and overturned through the retraction device and placed at a designated position to be recovered through the longitudinal moving guide rail.

9. The method of track rail replacement work of claim 8, wherein: in the placing operation state of the step S2), after the retraction device clamps and overturns the first door hanger to a position above the placing position, the supporting legs of the door hanger move to two sides of the cross beam, the leveling supporting legs extend downwards to be close to the ground, the clamping mechanism of the retraction device is loosened, and each leveling supporting leg extends to level the door hanger; and the first transportation flatcar moves forwards, and the door hanging device placing action is repeated until all the door hanging devices are placed at the designated positions and leveled.

10. A method of rail track-laying operation according to claim 2, 3, 5, 7 or 9, wherein: in the recycling operation state of the step S7), the old rail parts are lifted by a group crane, the second transportation flat car is driven in the opposite direction, and after the old rail parts are placed on the second transportation flat car by the group crane, the hanging chains of the door hanging device are loosened; the marshalling continues to run in the opposite direction, and the gantry crane devices are recycled to the first transportation flatcar one by one through the retraction device; in the step S8), after all the gantry cranes are recovered, all the equipment is fixed on the first transportation flatcar and the second transportation flatcar, and the equipment is separated from the first transportation flatcar and the second transportation flatcar to finish the paving operation.

11. The method of track rail replacement work of claim 10, wherein: in the paving operation state of the steps S3) to S6), the hanging chain of the door hanging device hangs the new rail part, the new rail part is lifted, and the second transportation flat car continues to move forwards until the second transportation flat car leaves the operation area; the new rail large rail piece is transversely moved to one side close to the supporting leg through the group crane to be stably placed, the old rail large rail piece is lifted, transversely moved and placed on the other side, and then the new rail large rail piece is lifted and placed at the position of the original old rail large rail piece, so that the replacement of the new and old rail large rail pieces is completed.