CN114673035B - Track slab replacement operation method - Google Patents

Abstract

The invention discloses a rail plate replacement operation method, which adopts a transport flat car to transport a plurality of gantry cranes, a lifting tool and a new rail plate to an operation site, wherein the gantry cranes are unloaded in place according to positions and sequences, and the gantry cranes are uniformly deployed at the rail plate to be replaced along a rail line. Then, a new track plate is lifted and placed at a designated position by a group lifting system consisting of a plurality of gantry cranes through a lifting tool, a steel rail fastener is removed, and steel rails at the track plate to be replaced are pulled to two sides of the track plate. Lifting tool is used for lifting new and old track boards through a group lifting system formed by a plurality of gantry cranes, and therefore replacement of the track boards is achieved. And finally, lifting the old track plate to a second transport flat car, and respectively and sequentially loading and fixing each gantry crane and driving. The invention can solve the technical problems of low replacement efficiency, high labor intensity and high labor input of the existing replacement operation method.

Description

Track slab replacement operation method

Technical Field

The invention relates to the technical field of railway engineering machinery, in particular to a track slab replacement operation method for a high-speed railway ballastless track.

Background

The high-speed railway line mainly adopts a ballastless track, and the plate-type ballastless track is a main structural form of the high-speed railway line. The track slab of the high-speed railway ballastless track is of a concrete structure, and is not only a main supporting piece of a steel rail, but also a main component of a high-speed railway line. However, as the working time increases, the track slabs will also gradually appear map cracks, large-area chipping, peeling and other cracking conditions, which seriously affect the safe running of the high-speed rail. The plate-type ballastless track plate in China mainly has three forms, namely: the three types of structures are not greatly different, and are mainly characterized by large size and heavy weight (up to 9 tons), and are positioned below the steel rail, so that manual replacement is very difficult. Currently, there are mainly two methods below for the replacement work of the track plate.

The method is to saw the steel rail at the place of the track plate to be replaced, lift the track plate to be replaced away by a track crane or other cranes, lift a new track plate to the place of replacement, and after the new track plate is installed, re-weld and recover the cut steel rail. The other method is to dismantle the rail fastener adjacent to the rail plate to be replaced, transversely prop up or vertically hoist the rail, and replace the rail plate by a crane or other small tools which are temporarily assembled. Both the two methods need to use a track crane to hoist the new and old track plates to a transport vehicle, and need to temporarily assemble machines, so that more people are needed, the time is long, and the efficiency is low.

In the prior art, the following technical schemes are mainly related to the invention:

the prior art 1 is a Chinese invention application with publication number CN106988169A, which is applied for 16 days of the national institute of railway and science in 05 month of 2017 and published 28 days of 2017 and 07. The invention discloses a system and a method for replacing a track plate after a steel rail is transversely pulled out. The system comprises rail temperature actual locking and current rail temperature testing equipment, rail stress and strain testing equipment, rail transverse pushing equipment, rail plate conveying equipment, rail plate hoisting equipment, a measuring device and a rail pulling-back device. The method comprises setting up reaction stops or reaction devices on the lines with a certain distance before and after the replaced track slab, setting up pushing points on the steel rail, loosening fasteners with a certain length, pushing the steel rail to the outer side of the replaced track slab by pushing equipment, and removing the old slab and positioning the new slab by vertical lifting. However, the system and the method have the technical defects that the track plate is not easy to be on line, the replacement time is long, and the like. Meanwhile, because the line environment is complex, barriers possibly exist, so that the system is inconvenient to move along the line, the replacement efficiency is low, and the labor intensity is high.

The prior art 2 is a China railway science institute, which applies for 16 days of 05 month in 2017 and published 14 days in 07 month in 2017, and has a publication number of CN 106948228A. The invention discloses a system and a method for quickly replacing a ballastless track slab, wherein the replacing system comprises a steel rail jacking device, a track slab translation device, a track slab placing tray, track slab conveying equipment and track slab lifting equipment. The replacing method comprises the steps of jacking a steel rail on a track plate to be replaced by a certain height, jacking the track plate by using a cross-roof, moving the track plate out of the range of the steel rail by using a track plate translation device and placing the track plate on a tray, moving the track plate to be replaced by using hoisting equipment, placing a new track plate on the tray, moving the new track plate into the original track plate to be positioned, and finally recovering the limit of the track plate and bonding between the track plate and a filling layer. However, the high-speed railway has complex links, obstacles exist in some places, the space at two sides of the high-speed railway is narrow, the tray is not easy to place and is inconvenient to move, so that the replacement system and the method have low replacement efficiency, high labor intensity and high labor input.

The prior art 3 is a China railway science institute, which applies for 16 days of 05 month in 2017 and opens 18 days in 08 month in 2017, and has a publication number of CN 107059506A. The invention discloses a plate-type ballastless track plate replacing method, which comprises a replacing process, equipment tools and grouting materials, and specifically comprises the steps of loosening fasteners before and after a track plate to be replaced by a certain length, lifting a steel rail by a certain height, lifting the track plate to be replaced to separate from mortar of a lower filling layer, installing a lifting appliance with a plurality of lifting points on the track plate, carrying out translational lifting on the replaced track plate and translational lifting of a new plate through switching of a track crane and lifting points of the lifting appliance, and filling a gap between the new track plate and an original debonding layer by adopting a quick hardening grouting material after the new plate is in place, so as to recover the steel rail and the fasteners. However, the method adopts the approach operation mode of the rail crane, so that the overhead line system is easy to touch, the operation is unsafe, the single-point lifting rail plate is unstable, the positioning is inaccurate, and the required fine adjustment time is long.

Prior art 4 is a China national institute of railway science, national institute of construction, 16 th day, 05 th month, 2017, 09 th month, 01 th day, and published with the publication number CN 107119515A. The invention discloses an in-situ rotary movement quick plate changing system and method for replacing ballastless track plates, which are used for replacing damaged ballastless track plates in a rotary and movable track plate mode. The method comprises the following steps: the plate replacing system is in place, the steel rail is lifted, the replaced track plate horizontally moves right, the left strand steel rail falls down, the replaced track plate moves left and rotates, the replaced track plate is stored in the plate storing box, the hanging frame is connected with the new track plate, the new track plate rotates and moves out of the plate storing box, the new track plate rotates and moves right, the left strand steel rail is lifted, the new track plate moves left, the new track plate is in place, the steel rail and the fastener are restored, and the plate replacing system is removed. However, because the space at two sides of the high-speed railway is narrow, the environment is complex, the track plate is difficult to move and rotate, the operation efficiency is low, the labor intensity is high, and the safety is low.

Disclosure of Invention

Accordingly, the invention aims to provide a rail plate replacement operation method, which aims to solve the technical problems of low efficiency, high labor intensity and high labor input of the existing replacement operation method.

In order to achieve the above object, the present invention specifically provides a technical implementation scheme of a track plate replacement device, a track plate replacement operation method, including the following steps:

s101) a plurality of gantry cranes are longitudinally fixed on a first transportation flat car through rotary mounting seats, a new track plate and a lifting tool are placed on a second transportation flat car, and are transported to a designated position of an operation site through the track car;

s102) the rail car pulls the first transportation flatcar to move to the placement position of the first gantry crane, and the rotary mounting seat rotates by 90 degrees until the gantry crane is vertical to the line direction;

s103) the rotary mounting seat pulls the gantry crane to descend, and the supporting leg of the gantry crane moves to a designated position along the cross beam; the supporting legs extend downwards to be close to the ground, the locking of the rotary mounting seat on the gantry crane is released, the supporting legs continue to extend and level, and the deployment of one gantry crane is completed;

s104) the rail car pulls the first transportation flatcar to sequentially move, and the step S103) is repeatedly executed until all gantry cranes are deployed to the designated positions;

S105) the rail car pulls the second transportation flatcar to move to a designated position, the gantry crane lifts a lifting tool, and the lifting tool moves and lifts a new rail plate;

s106) the rail car pulls the first transportation flatcar and the second transportation flatcar to drive away, and the lifting tool pulls the new rail plate to the adjacent plate of the old rail plate to be replaced;

s107) laying a support on an adjacent plate, the lifting tool being lowered, placing a new track plate on the adjacent plate by means of the support.

Further, after said step S107), the following procedure is also included:

s108) carrying out fastener disassembly, installing a supporting plate by using fastener screw holes, and poking steel rails to two sides of a track plate by using telescopic rods;

s109) removing the old track plate, and lifting the old track plate by the gantry crane through a lifting tool;

s110) a support is arranged on the other adjacent plate in a pad mode, and the old track plate is moved to the other adjacent plate through a lifting tool by the gantry crane and is placed on the other adjacent plate through the support;

s111) the lifting tool moves to a new track plate and lifts the new track plate, and the new track plate is lifted to a place to be replaced and the replacement is completed.

Further, after said step S111), the following procedure is included:

S112) pulling the steel rail back to the original position through the telescopic rod, and detaching the supporting plate for fastener installation;

s113) the gantry crane lifts the old track plate through a lifting tool, and the track car pulls a second transport flat car to drive in;

s114) placing the old track plate on the second transportation flatcar by the lifting tool.

Further, after the step S114), the following procedure is included:

s115) the rail car pulls the first transportation flatcar to move to the position below the gantry crane at the final position, and the cross beam of the gantry crane is aligned with the groove position of the rotary mounting seat;

s116) the landing leg of the gantry crane is contracted, and the rotary mounting seat is lifted to the position that the cross beam enters the groove of the rotary mounting seat and is fixed;

s117) the landing leg of the gantry crane continues to retract to a starting position, and the landing leg moves to the starting position along the cross beam;

s118) repeatedly executing the steps S115) to S117) to finish the recovery process of the rest gantry cranes;

s119) the rotary mounting seat rotates 90 ° until the gantry crane is longitudinally fixed, and the rail car pulls the first transport flat car and the second transport flat car to drive away.

Further, the lifting tool comprises a lifting beam, a longitudinal moving mechanism, a lifting ring and a traction mechanism. The lifting mechanism comprises a lifting hook capable of lifting vertically, the lifting ring is arranged on the upper part of the lifting beam, and the lifting hook is connected with the lifting ring. The longitudinal moving mechanism is movably arranged at the lower part of the hanging beam and used for hanging the track plate. And after the gantry cranes are deployed to the proper positions, the track plate is lifted by the longitudinal moving mechanism. When the track plate is lifted, the longitudinal moving mechanism is driven by the traction mechanism to move back and forth on the lifting beam along the line direction, so that the track plate is lifted to a specified longitudinal position.

Further, the lifting tool further comprises a chain wheel, a chain, a hanging chain and pulleys, wherein rails are arranged on the left side and the right side of the bottom of the hanging beam along the line direction. The longitudinal moving mechanism is used for lifting the track plate through a lifting chain, and the longitudinal moving mechanism longitudinally moves on the track through a pulley. The two ends of the hanging beam along the line direction are provided with chain wheels, and the two chain wheels are connected through a chain. The chain is connected with the longitudinal moving mechanism, one of the chain wheels is driven to rotate through the traction mechanism, and the chain wheel is driven to move along the line direction by rotation of the chain wheel, so that the longitudinal movement of the track plate is realized.

Further, the gantry crane further comprises a sliding frame and a lifting mechanism, wherein the sliding frame is movably arranged at the left end and the right end of the cross beam, and the sliding frame can transversely move along the cross beam. And a lifting mechanism is arranged on the cross beam between the two sliding frames, and can transversely move along the cross beam. Legs which can stretch along the vertical direction are respectively arranged below the two sliding frames. And a sliding driving mechanism is arranged between the cross beam and the sliding frame.

Further, a transverse support with internal threads is arranged on the sliding frame, and a mounting seat is arranged on the cross beam. The sliding driving mechanism adopts a power driving screw mechanism, the power driving end of the sliding driving mechanism is fixed on the mounting seat, the screw end is connected to the transverse moving support, and the sliding frame is driven to realize transverse moving by the rotation of the power driving screw.

Further, a wedge-shaped locking mechanism is arranged in the sliding frame, and the wedge-shaped locking mechanism is positioned between the cross beam and the sliding frame and comprises two wedge-shaped sliding blocks which are in contact with each other. After penetrating through the sliding frame, the locking mechanism compresses the two wedge-shaped sliding blocks so as to lock the sliding frame. And after the transverse spans of the two supporting legs are adjusted in place, the wedge-shaped locking mechanism is used for locking the position of the sliding frame.

Further, the landing leg comprises a threaded cylinder, a screw, a support and a landing leg sleeve. The lower part of the sliding frame is connected with a threaded cylinder, a supporting leg sleeve is sleeved below the threaded cylinder, and a support is arranged below the supporting leg sleeve. The support is internally provided with a lifting driving mechanism, the support leg sleeve is internally provided with a screw rod, the upper end of the screw rod is connected with the threaded cylinder through threads, and the lower end of the screw rod is connected with the lifting driving mechanism. The lifting driving mechanism drives the screw rod to rotate so that the threaded cylinder moves up and down, and the telescopic function of the supporting leg is realized.

Further, a bearing is provided between the screw and the support.

Further, the lower parts of the supporting legs are provided with adjustable supporting legs, and the supporting legs and the gantry crane can be leveled through the adjustable supporting legs in the deployment process of the gantry crane.

By implementing the technical scheme of the track plate replacement operation method provided by the invention, the track plate replacement operation method has the following beneficial effects:

(1) According to the rail plate replacement operation method, the gantry crane supporting legs are arranged on the two sides of a railway line in a crossing mode, adjacent line operation is not needed, safety risks of operation exceeding limits are avoided, meanwhile, the device is simple in structure, simple to operate, high in reliability, convenient to maintain and overhaul, few in needed operators, high in operation efficiency and capable of achieving lifting of large-size rail plate components;

(2) The track plate replacement operation method is safe and reliable in operation, is suitable for replacing the whole group of track plates and replacing single switch rails, switch centers and the like, can realize carrying, placing, position adjustment and replacement of various circuit components with different lengths through the combination of a plurality of gantry cranes, and particularly can realize lifting of large-size track plate components;

(3) According to the rail plate replacement operation method, the gantry crane has the functions of supporting leg transverse movement, lifting and leveling, the lateral span distance and the ground height of the supporting legs are adjustable, the functions of meeting the ground working condition requirements of different circuits can be met, the height of the gantry crane device is adjustable, stable lifting can be ensured, and the risk of touching the contact net in the lifting process is avoided;

(4) The rail plate replacement operation method has the advantages that the manufacturing cost of the gantry crane is low, the replacement is quick, the efficiency is high, the gantry crane is longitudinally arranged on the flatcar without exceeding the limit of the vehicle during transportation, the lifting tool is provided with the longitudinal moving mechanism, long-distance longitudinal movement of the rail plate can be realized, the rail plate is positioned more accurately, and the technical problems of low safety of the movement of the gantry crane and poor adaptability to the operation environment can be solved;

(5) According to the rail plate replacement operation method, the lifting tool is provided with the self-propelled longitudinally moving mechanism, so that the technical problems of low safety of gantry crane movement and poor operation environment adaptability can be solved; the lifting beam adopts a rectangular tubular structure and high-strength materials, so that the lifting tool has enough rigidity and strength, and the self weight is light, thereby reducing the load of the gantry crane;

(6) According to the track plate replacement operation method, the lifting beam of the lifting tool adopts the rectangular hanging, when the longitudinal position of the gantry crane is offset, the rectangular hanging is of a sufficient size to enable the lifting hook to correspondingly move for a certain distance, so that the offset influence is eliminated, the lifting mechanism of each gantry crane is basically kept parallel, and the lifting stability is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the invention, from which other embodiments can be obtained for a person skilled in the art without inventive effort.

FIG. 1 is a schematic perspective view of a gantry crane in one embodiment of a track slab change apparatus on which the method of the present invention is based;

FIG. 2 is a schematic diagram of the elevation of a gantry crane in one embodiment of a track slab change apparatus upon which the method of the present invention is based;

FIG. 3 is a schematic side view of a gantry crane in one embodiment of a track slab change apparatus upon which the method of the present invention is based;

FIG. 4 is a side perspective view of a gantry crane in one embodiment of a track slab change apparatus upon which the method of the present invention is based;

FIG. 5 is a schematic top view of the gantry crane in one embodiment of a track slab change apparatus upon which the method of the present invention is based;

FIG. 6 is a schematic view of a transverse structure of a handling tool in one embodiment of a track slab change apparatus on which the method of the present invention is based;

FIG. 7 is a schematic view of a longitudinal structure of a handling tool in one embodiment of a track slab change apparatus on which the method of the present invention is based;

FIG. 8 is a schematic perspective view of a handling tool in one embodiment of a track slab replacement apparatus according to the method of the present invention;

FIG. 9 is a schematic view of a gantry crane installation structure in one embodiment of a track slab replacement system on which the method of the present invention is based;

FIG. 10 is a schematic illustration of the structure of a swivel mount in one embodiment of a track plate change system upon which the method of the present invention is based;

FIG. 11 is a schematic perspective view of a swivel mount in one embodiment of a track plate replacement system upon which the method of the present invention is based;

FIG. 12 is a schematic bottom view of a rotational mount in one embodiment of a track plate change system upon which the method of the present invention is based;

FIG. 13 is a schematic side view of a swivel mount in one embodiment of a track plate change system upon which the method of the present invention is based;

FIG. 14 is a schematic side view of a swivel mount in another view of an embodiment of a track plate change system upon which the method of the present invention is based;

FIG. 15 is a schematic diagram of a track slab replacement system in which the method of the present invention is based, in a top view;

FIG. 16 is a schematic diagram of a track plate change device transportation step in a top view of an embodiment of a track plate change method of the present invention;

FIG. 17 is a schematic view of a gantry crane in an embodiment of a track slab change operation method of the present invention in a top view with the gantry crane in an operational position and rotated to a lateral position;

FIG. 18 is a schematic diagram of a gantry crane telescoping off step in a top view in one embodiment of a track slab change operation method of the present invention;

FIG. 19 is a schematic view of a new track slab lifting step in a side view of an embodiment of a track slab replacement process of the present invention;

FIG. 20 is a schematic illustration of a new track plate placement adjacent plate step in an embodiment of a track plate change operation method of the present invention in a side view;

FIG. 21 is a schematic diagram of a new track plate placement step into an adjacent plate in a top view of an embodiment of a track plate change operation method of the present invention;

FIG. 22 is a schematic diagram of an old track slab removal step in a top view of one embodiment of a track slab replacement process of the present invention;

FIG. 23 is a schematic illustration of an old track slab lifting step in a side view of an embodiment of a track slab replacement operation method of the present invention;

FIG. 24 is a schematic illustration of an embodiment of a track plate change operation method of the present invention in a side view of the old track plate placement to adjacent plate step;

FIG. 25 is a schematic view of a new track plate in place step in a top view of an embodiment of a track plate change operation method of the present invention;

FIG. 26 is a schematic diagram of an old track slab lifting step in a top view of an embodiment of a track slab replacement method of the present invention;

FIG. 27 is a schematic diagram of an old track slab recycling to flatcar step in a side view of an embodiment of a track slab replacement method of the present invention;

FIG. 28 is a schematic diagram of a track plate change device recovery step in a top view of an embodiment of a track plate change method of the present invention;

FIG. 29 is a schematic view of a gantry crane locked to a swivel mount in a top view of one embodiment of a track slab replacement process of the present invention;

FIG. 30 is a schematic view of a gantry crane rotating to longitudinal fixing step in a top view according to an embodiment of the track slab replacement process of the present invention;

in the figure: 1-cross beam, 2-sliding frame, 3-sliding driving mechanism, 4-lifting mechanism, 5-supporting leg, 6-threaded cylinder, 7-lifting driving mechanism, 8-adjustable supporting leg, 9-screw rod, 10-supporting seat, 11-supporting leg sleeve, 12-power cabinet, 13-bearing, 14-first distance sensor, 15-second distance sensor, 16-force sensor, 17-inclination sensor, 18-wedge locking mechanism, 19-lifting seat, 20-slewing bearing, 21-fixed mounting seat, 22-locking seat, 23-guide pillar seat, 24-lifting mechanism, 25-guide pillar, 26-locking mechanism, 27-sliding mechanism, 28-groove, 29-stop, 30-guiding protuberance, 31-guiding groove, 32-rotation driving mechanism, 33-lifting tool, 34-hanging beam, 35-longitudinal moving mechanism, 36-track plate, 37-chain wheel, 38-chain, 39-hanging ring, 40-traction mechanism, 41-hanging chain, 42-pulley, 43-track, 44-first transporting flatcar, 45-rail, 46-base, 47-roadbed, 48-locking mechanism, 49-mounting seat, 50-track car, 51-second transporting flatcar, 52-power device, 53-support, 54-pallet, 55-telescopic rod, 56-lifting hook, 57-traverse support, 58-bottom plate, 361-new track plate, 362-old track plate, 363-adjacent plate, 100-portal crane, 200-rotary mounting seat.

Detailed Description

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

Referring now to fig. 1 to 30, a specific embodiment of the track slab replacement operation method according to the present invention is shown, and the present invention will be further described with reference to the accompanying drawings and the specific embodiment.

Example 1

In order to solve the technical problems of the existing lifting equipment for the track line, embodiment 1 provides a track slab replacing device based on lifting of a gantry crane 100, which has the advantages of simple structure, low cost and convenient and quick operation. The track slab replacing device can utilize the skylight time, and adopts a transportation flat car to transport the gantry crane 100, the lifting tool 33, objects needing to be operated and the like to an operation site for lifting operation.

As shown in fig. 1 to 9, an embodiment of a track slab replacing device on which the method of the present invention is based specifically includes:

The gantry cranes 100 are arranged at intervals along the railway line direction, and the gantry cranes 100 are arranged on the roadbed 47 at two sides of the steel rail 45 in a crossing manner.

Gantry crane 100 further includes:

a cross beam 1;

the sliding frames 2 are respectively and movably arranged at the left end and the right end of the cross beam 1, and the sliding frames 2 can move transversely along the cross beam 1 (in the direction shown as W in figure 1) so as to adjust the transverse span of the gantry crane 100;

the lifting mechanism 4 is arranged on the cross beam 1 and between the two sliding frames 2 and can transversely move along the cross beam 1 so as to adjust the transverse lifting position of the track plate 36;

the supporting legs 5 are respectively arranged below the two sliding frames 2 and can stretch and retract along the vertical direction (the direction shown as H in the figure 1) so as to adjust the height of the cross beam 1 from the roadbed 47.

The track plate replacement device further includes: and the lifting tool 33 is connected with the lifting mechanism 4 in an operation state and is used for lifting the track plate 36, and the longitudinal position of the track plate 36 can be adjusted through the lifting tool 33.

As shown in fig. 9, when the gantry crane 100 is deployed from the first transportation flatcar 44 to the railway line, the gantry crane 100 is supported on the roadbed 47 at both sides of the railway line through the support legs 5, the foundation 47 is provided with the base 46, the base 46 is provided with the track slab 36, and the rail 45 is provided on the track slab 36. The total height H of the gantry crane 100 is equal to or greater than the height H1 of the bottom plate 58 of the first transport flat car 44 from the rail surface of the rail 45 and the height H2 of the rail surface of the rail 45 from the roadbed 47 and the clearance H3 of the lifting mechanism 4. The clearance H3 of the hoisting mechanism 4 is the distance from the beam 1 when the hook 56 of the gantry crane 100 is at the highest position.

As shown in fig. 2, the lower part of the supporting leg 5 is further provided with an adjustable support leg 8, and the leveling function of the supporting leg 5 and the gantry crane 100 can be realized through the adjustable support leg 8. The beam 1 is provided with an inclination sensor 17, inclination state data of the gantry crane 100 are acquired through the inclination sensor 17, and leveling of the beam 1 is achieved through fine adjustment of the adjustable support legs 8.

The lifting mechanism 4 is further provided with a first distance sensor 14, and the first distance sensor 14 is used for acquiring the distance between the lifting mechanism 4 and the supporting leg 5 so as to realize the alignment of the transverse positions when the plurality of gantry cranes 100 lift the track slab. When the gantry cranes 100 perform lifting operation, the first distance sensor 14 obtains the distance between the lifting mechanism 4 and the supporting legs 5, and the distance difference between the supporting legs 5 and the lifting mechanism 4 on the same side of each gantry crane 100 is controlled to meet the set requirement so as to realize the transverse position alignment when the gantry cranes 100 synchronously lift the track slabs.

The two sliding frames 2 or the supporting legs 5 of the gantry cranes 100 are further provided with second distance sensors 15, and the second distance sensors 15 are used for acquiring the distances between the two adjacent gantry cranes 100 so as to meet the requirement of parallelism between the cross beams 1 of the two gantry cranes 100. After the first gantry crane 100 is deployed in place, the gantry crane 100 deployed later acquires the distance between the two gantry cranes 100 arranged adjacently through the second distance sensor 15 arranged on the two sliding frames 2 or the supporting legs 5, and the parallelism requirement between the cross beams 1 of the two gantry cranes 100 is met by adjusting the rotation angle of the rotation mounting seat 200.

The hoisting mechanism 4 is further provided with a force sensor 16 to realize stability control when the plurality of gantry cranes 100 hoist the track slabs. When the gantry crane 100 starts to hoist a new track slab or an old track slab, the hoist mechanism 4 of each gantry crane 100 takes the acquired value of the force sensor 16 at this time as a reference value. If the variation value in the subsequent lifting process exceeds the standard value, the collected value of the force sensor 16 of the lifting mechanism 4 in the lifting process is maintained to be basically equivalent to the standard value by adjusting the rotating speed of the motor of the lifting mechanism 4, so that the vertical stability control of the plurality of gantry cranes 100 when synchronously lifting the track plate is realized.

The gantry crane 100 further comprises a sliding driving mechanism 3, the sliding frame 2 is sleeved on the cross beam 1, one end of the sliding driving mechanism 3 is arranged on the cross beam 1, and the other end of the sliding driving mechanism is connected with the sliding frame 2. The sliding frame 2 is provided with a transverse support 57 with internal threads, and the cross beam 1 is provided with a mounting seat 49. The sliding driving mechanism 3 adopts a power driving screw mechanism, the power driving end of the sliding driving mechanism 3 is fixed on the mounting seat 49, the screw end is connected to the transverse moving support 57, and the sliding frame 2 is driven to realize transverse moving by the rotation of the power driving screw.

As shown in fig. 3 and fig. 4, a wedge-shaped locking mechanism 18 is further arranged in the sliding frame 2, and the wedge-shaped locking mechanism 18 is positioned between the cross beam 1 and the sliding frame 2 and comprises two wedge-shaped sliding blocks which are in contact with each other. After passing through the sliding frame 2, the locking mechanism 48 compresses the two wedge-shaped sliding blocks to lock the position of the sliding frame 2. After the transverse spans of the two support legs 5 are adjusted in place, the position locking of the sliding frame 2 is achieved through the wedge-shaped locking mechanism 18.

The leg 5 further comprises a screw barrel 6, a screw 9, a support 10 and a leg sleeve 11. The screw thread section of thick bamboo 6 is connected in the below of sliding frame 2, and the lower part of screw thread section of thick bamboo 6 is located to landing leg sleeve 11 cover, and support 10 sets up in the below of landing leg sleeve 11. The screw rod 9 is arranged in the supporting leg sleeve 11, the upper end of the screw rod 9 is connected with the threaded cylinder 6 through threads, and the lower end of the screw rod 9 is connected with the lifting driving mechanism 7. The lifting driving mechanism 7 is arranged in the support 10, and the screw 9 is driven to rotate through the lifting driving mechanism 7 to enable the threaded cylinder 6 to move up and down, so that the telescopic function of the supporting leg 5 is realized.

As shown in fig. 6, 7 and 8, the lifting fixture 33 further includes a lifting beam 34, a longitudinal moving mechanism 35, a lifting ring 38 and a traction mechanism 40. The lifting mechanism 4 comprises a lifting hook 56 capable of lifting vertically, the lifting ring 38 is arranged on the upper part of the lifting beam 34, and the lifting hook 56 is connected with the lifting ring 38. The vertical movement mechanism 35 is movably disposed at a lower portion of the hanging beam 34, and is used for hanging the track plate 36. After a plurality of gantry cranes 100 are deployed to the proper positions, the track slab 36 is lifted by the vertical movement mechanism 35. When the track plate 36 is lifted, the longitudinal moving mechanism 35 is driven by the traction mechanism 40 to move back and forth on the hanging beam 34 along the line direction (the direction L shown in fig. 7 and 8), so that the track plate 36 is lifted to a specified longitudinal position.

The lifting tool 33 further comprises a chain wheel 37, a chain 38, a hanging chain 41 and a pulley 42, and rails 43 are arranged on the left side and the right side of the bottom of the hanging beam 34 along the line direction. The vertical movement mechanism 35 lifts the rail plate 36 by the hoist chain 41, and the vertical movement mechanism 35 moves vertically on the rail 43 by the pulley 42. The hanging beam 34 is provided with sprockets 37 at both ends in the line direction, and the two sprockets 37 are connected by a chain 38. The chain 38 is connected with the longitudinal moving mechanism 35, one of the chain wheels 37 is driven to rotate by the traction mechanism 40, and the chain wheel 37 rotates to drive the chain 38 to move along the line direction, so that the track plate 36 moves longitudinally (in the direction shown as L in the figures 7 and 8) to solve the technical problem of accurate positioning of the track plate 36. The traction mechanism 40 can be in the form of a chain sprocket or a winch, so that the structure is simpler, the cost is lower, the operation is simple, and the safety and reliability are realized.

The lifting tool 33 consists of a hollow lifting beam 34, a longitudinal moving mechanism 35, a traction mechanism 40 and the like. The hollow hanging beam 34 adopts a rectangular tubular structure, is made of high-strength materials, has enough wall thickness to ensure the strength and rigidity, and is provided with a bottom welding steel plate and two sides with running tracks. The vertical movement mechanism 35 (i.e., the travelling carriage) is composed of a carriage body and wheels, and 2 to 4 pairs of wheels are symmetrically mounted on the left and right sides of the carriage body so as to be capable of travelling on a travelling rail. The longitudinal moving mechanism 35 is provided with a sufficient number of chain hangers with hooks on both sides to hang the track plate 36. The traction mechanism 40 can adopt a chain wheel, a chain or a winch structure, is fastened with the longitudinal movement mechanism 35 by adopting a chain or a steel wire rope, and realizes the longitudinal movement of the longitudinal movement mechanism 35 by the forward and reverse rotation of the traction mechanism 40. The longitudinal moving mechanism 35 adopts a motor or a motor with a gear box and a braking device, and a chain or a steel wire rope passes through the rectangular lifting beam 34. A plurality of hanging hooks 56 are welded on the upper part of the hanging beam 34, and can be hooked by the hanging hooks 56 of the gantry crane 100, so that a certain deviation of the gantry crane 100 in the longitudinal position can be satisfied. In operation, when the group crane consisting of the gantry crane 100 firstly lifts the lifting tool 33 to a proper position, the lifting chain 41 of the lifting tool 33 can hook the track plate 36, and then the lifting tool 33 and the track plate 36 are lifted together through the group crane. When the traction mechanism 40 is activated, the longitudinal movement mechanism 35 moves the track plate 36 in the line direction and places it in the replacement position.

The track slab replacing device described in embodiment 1 has the legs 5 which are vertically retractable and which can slide on the cross beam 1 to adjust the span and height of the gantry crane 100 to accommodate different field conditions and the replacement of different sizes of track slabs 36. The supporting leg 5 adopts a rotatable and leveling mechanism and is realized by adopting an oil cylinder or an electric screw rod and the like. The hoisting mechanism 4 may be a hoist or other lifting appliance.

Example 2

As shown in fig. 15, an embodiment of a track slab replacement system on which the method of the present invention is based specifically includes:

rail car 50, first transport flatcar 44 and second transport flatcar 51;

gantry crane 100 provided on first transportation flat carriage 44 in the transportation state as described in embodiment 1;

a rotary mount 200 provided on the first transportation flat carriage 44 in a transportation state for fixing the gantry crane 100;

the handling tool 33 and the track plate 36 are provided on the second transportation flat car 51 in a transportation state.

The transportation adopts the temporary hauling of the rail car 50, one refitted flat car (namely the first transportation flat car 44) to transport a plurality of gantry cranes 100, and two common flat cars (namely the second transportation flat car 51) to transport new and old rail plates, as shown in fig. 15. The rail car 50, the first transportation flat car 44 or the second transportation flat car 51 is further provided with a power device 52 for powering the swivel mount 200. The power plant 52 may be of different types: the battery or generator is driven, and the actuating mechanism can be electrically driven or hydraulically driven. A single drive or a centralized unified power drive mode per swivel mount 200 may be employed.

In the working state, the plurality of gantry cranes 100 are arranged at intervals along the line direction (the direction L shown in fig. 15), the upper part of the lifting tool 33 is connected with the lifting hooks 56 of the plurality of gantry cranes 100 through the lifting rings 39, and the lower part of the lifting tool 33 is connected with the track plate 36 through the plurality of lifting chains 41. After the track plate 36 is lifted, the longitudinal moving mechanism 35 is driven by the traction mechanism 40 to move back and forth along the line direction relative to the hanging beam 34, so as to realize accurate positioning of the track plate 36 in the longitudinal direction.

The track slab replacing system described in embodiment 2 adopts a group-hanging mode of a plurality of (typically 3 to 5) gantry cranes 100, and transports 3 to 5 gantry cranes 100, a hanging tool 33 and a new track slab 361 to an operation site through track trolleys (including a track trolley 50, a first transport trolley 44 and a second transport trolley 51), and the plurality of gantry cranes 100 are sequentially lowered to a designated position according to position and sequence. Then, the new track slab 361 is unloaded and placed under the gantry crane 100 by the cluster crane and dedicated handling tool 33. The old track slab 362 is then removed and replaced by the gantry crane 100. After the line is restored, the old track slabs 362 are lifted onto the second transport flat car 51, and the plurality of gantry cranes 100 are respectively loaded in sequence and fixedly driven.

Example 3

As shown in fig. 10 to 14, an embodiment of a rotation fixing device applied to the track plate replacement system of embodiment 2 specifically includes:

a fixed mount 21 fixed to the first transportation flatcar 44;

the lifting seat 19 is used for fixedly mounting the gantry crane 100, and the lifting seat 19 can perform lifting motion relative to the fixed mounting seat 21 so as to realize the first transportation flatcar 44 on and off the gantry crane 100;

the swivel bearing 20 is disposed between the fixed mounting seat 21 and the lifting seat 19, and the lifting seat 19 can perform horizontal rotation movement relative to the fixed mounting seat 21 through the swivel bearing 20 so as to adjust the mounting direction of the gantry crane 100.

The rotation fixing device described in embodiment 3 can fix a plurality of gantry cranes 100 on a rail flat car, and the plurality of gantry cranes 100 are transported by the rail flat car and deployed to an operation site for lifting operation and then recovered without exceeding the transportation limit of the vehicle.

When in a transport state, the gantry crane 100 is longitudinally fixed to the lifting base 19. When in the deployed state, gantry crane 100 is adjusted to a lateral arrangement by rotation of slew bearing 20.

The rotary fixing device further comprises a locking seat 22 arranged on the lifting seat 19, a plurality of grooves 28 for fixing the gantry crane 100 are arranged on the locking seat 22, and the number of the grooves 28 is determined according to the size of the gantry crane 100, and is generally 2-3 pairs. The rotation fixing device further comprises a guide post seat 23 arranged on the rotary bearing 20, wherein the inner ring of the rotary bearing 20 is fixedly installed with the guide post seat 23, and the outer ring of the rotary bearing 20 is fixedly installed with the fixed installation seat 21. The guide post seat 23 is provided with a guide post 25, the guide post 25 penetrates through a through hole formed in the lifting seat 19, and when the lifting mechanism 24 performs telescopic movement, lifting guide of the lifting seat 19 is realized by the guide post 25. The rotation fixing device further comprises a rotation driving mechanism 32, one end of the rotation driving mechanism 32 is fixedly arranged on the fixed mounting seat 21, and the other end of the rotation driving mechanism drives the slewing bearing 20 with the outer ring provided with the gear through the gear to realize the rotation function.

The rotation fixing device further comprises a lifting mechanism 24, one end of the lifting mechanism 24 is fixedly arranged on the guide post seat 23, the other end of the lifting mechanism is connected to the lifting seat 19, and the lifting function of the gantry crane 100 is achieved through telescopic movement of the lifting mechanism 24. A locking mechanism 26 is provided on the side of the locking seat 22 adjacent to each pair of grooves 28, and after the cross beam 1 of the gantry crane 100 is fixed in the groove 28, the gantry crane 100 is locked and mounted in the groove 28 by pressing the cross beam 1 by the locking mechanism 26. The locking mechanism 26 may be directly laterally compressed using an oil cylinder or may be compressed using a lever structure. The two sets of locking mechanisms 26 press the cross beam 1 of the gantry crane 100 into the groove 28 through the oil cylinder, so as to fix the gantry crane 100. The middle parts of the lifting seat 19 and the locking seat 22 are hollow to accommodate the lifting mechanism 4 of the gantry crane 100.

Two sliding mechanisms 27 are provided on the locking seat 22 opposite to each other, a stopper 29 is provided on the lifting seat 19 at a position opposite to the sliding mechanisms 27, and the movable end of the sliding mechanism 27 is in contact with the stopper 29. When the movable end of one of the sliding mechanisms 27 is stretched, the movable end of the other sliding mechanism 27 is contracted, so that the locking seat 22 is driven to slide relative to the lifting seat 19 along the moving direction of the sliding mechanism 27. Two guide protrusions 30 are provided on the lifting seat 19 opposite to each other in the moving direction of the sliding mechanism 27, and two guide grooves 31 corresponding to the guide protrusions 30 are provided on the locking seat 22. The guide groove 31 is slid on the guide protrusion 30 to guide the relative sliding between the locking seat 22 and the lifting seat 19.

The base of the fixed mount 21 is connected to the bottom plate 56 of the first transportation flatcar 44 by bolts, and the rotation function is realized by the rotation-driven gear-driven rotation bearing 20 mounted on the fixed mount 21 by mounting the rotation bearing 20 with a gear on the outer ring on the uppermost surface by bolts. The upper part of the inner ring of the slewing bearing 20 is provided with a guide post seat 23 through bolts, and the upper part of the guide post seat 23 is provided with two guide posts 25 through interference fit. The lifting mechanism 24 (which can be specifically a lifting oil cylinder, an air cylinder or an electric cylinder) is fixed on the guide post seat 23, a piston rod of the lifting mechanism 24 is connected with the lifting seat 19, the lifting seat 19 is sleeved on the two guide posts 25, and the lifting mechanism 24 stretches and contracts to realize a lifting function. The lifting seat 19 is provided with two guide protrusions 30 which function as guide rails. The locking seat 22 is provided with two guide grooves 31, and the guide grooves 31 are sleeved on the two guide protrusions 30 in a sliding mode. Two sliding mechanisms 27 (which can be specifically a lifting cylinder, an air cylinder or an electric cylinder) are arranged on the locking seat 22, a piston rod of the sliding mechanism 27 is connected with a stop part 29 on the lifting seat 19, and the sliding of the whole locking seat 22 on the lifting seat 19 can be realized when the two sliding mechanisms 27 are respectively extended and contracted.

When in the transport state, the gantry crane 100 is longitudinally lock mounted in the recess 28 of the stationary mount 21, as shown in fig. 15. When the operation site is reached, the lifting mechanism 24 drives the gantry crane 100 to rise to the highest point, and then the rotary driving mechanism 32 drives the gantry crane 100 to rotate to the transverse direction, and the lifting mechanism 24 drives the gantry crane 100 to descend to the operation surface. When the legs 5 of the gantry crane 100 descend to the designated position, the locking mechanism 26 is released and the gantry crane 100 is disengaged from the recess 28 to effect operational deployment of the gantry crane 100.

Example 4

In order to solve the technical problems of the existing track slab replacement process method, the embodiment provides the multi-gantry crane lifting track slab replacement operation method which is simple in structure, low in cost and convenient and quick to operate. The basic process of the operation method is as follows: the skylight time is utilized, a plurality of (e.g. 3-5) gantry cranes 100, lifting tools 33 and new track slabs 361 are transported to an operation site by adopting a transportation flat car, the plurality of gantry cranes 100 are unloaded in place according to positions and sequences, and the gantry cranes 100 are uniformly deployed at the track slabs to be replaced along the track line. Then, the new track slab 361 is lifted and placed at a designated position by a special lifting tool 33 in a group lifting system consisting of a plurality of gantry cranes 100, fasteners with certain lengths of two steel rails 45 are removed, and the steel rails 45 at the track slab to be replaced are pulled to two sides of the track slab 36. The lifting tool 33 is lifted by a group lifting system consisting of a plurality of gantry cranes 100, and the new and old track boards are lifted by a longitudinal moving mechanism 35 capable of walking on the lifting tool 33, so that the replacement of the track boards 36 is realized. Finally, the old track slabs 362 are lifted onto the second transport flat car 51, and the gantry cranes 100 are respectively and sequentially loaded and fixed and driven away. The track slab replacing device can stably get on and off the new and old track slabs from the transportation flatcar after the group crane is lifted, and can enable the lifted track slab 36 to move a certain distance along the line direction, thereby completing the replacement of the new and old track slabs. The gantry crane 100 does not need to travel by itself, but the longitudinal movement of the track plate 36 is realized by the longitudinal movement mechanism 35 traveling, so that the lifting operation safety is high, and the adaptability to the line replacement environment is good.

In this embodiment, other auxiliary process flows such as determination of the supporting point of the gantry crane, leveling of the supporting point, disassembly of the rail fastener, and leveling of the rail cutting, welding, polishing, etc. are omitted, and the rail plate replacement operation method of the present invention will be described in detail below.

As shown in fig. 16 to 30, an embodiment of the track slab replacement operation method of the present invention specifically includes the following steps:

s101) a plurality of gantry cranes 100 are longitudinally fixed on a first transport flat car 44 through a rotary mounting seat 200, a new track plate 361 and a lifting tool 33 are placed on a second transport flat car 51, and transported to a designated position of an operation site through a track car 50, as shown in fig. 16;

s102) the rail car 50 pulls the first transportation flat car 44 to move to the placement position of the first gantry crane 100, and the rotary mounting seat 200 rotates 90 degrees until the gantry crane 100 is vertical to the line direction, as shown in FIG. 17;

s103) the rotary mounting seat 200 pulls the gantry crane 100 to descend, and the supporting leg 5 of the gantry crane 100 moves to a specified position along the cross beam 1; the supporting legs 5 are extended downwards to be close to the ground, the locking of the rotary mounting seat 200 on the gantry crane 100 is released, the supporting legs 5 are extended continuously and leveled, and the deployment of one gantry crane 100 is completed, as shown in fig. 18;

S104) the rail car 50 pulls the first transportation flat car 44 to sequentially move, and repeatedly performs step S103) until all gantry cranes 100 are deployed to the designated positions;

s105) the rail car 50 pulls the second transportation flatcar 51 to move to a designated position, the gantry crane 100 lifts the lifting tool 33, and the lifting tool 33 moves and lifts the new rail plate 361, as shown in fig. 19;

s106) the rail car 50 pulls the first transportation flatcar 44, the second transportation flatcar 51 away from the rail plate replacement work area, and the lifting tool 33 pulls the new rail plate 361 to the adjacent plate 363 of the old rail plate 362 to be replaced, as shown in fig. 20;

s107) a support 53 is padded on the adjacent plate 363, the handling tool 33 is lowered, and a new track plate 361 is placed on the adjacent plate 363 through the support 53, as shown in fig. 21.

After step S107), the following procedure is also included:

s108) carrying out fastener disassembly, installing the supporting plate 54 by using fastener screw holes, and pulling the steel rail 45 to the two sides of the track plate 36 by using the telescopic rod 55, as shown in fig. 22;

s109) removing the old track slab 362, and lifting the old track slab 362 by the gantry crane 100 through the lifting tool 33, as shown in fig. 23;

s110) a support 53 is placed on the other adjacent plate 363, and the gantry crane 100 moves the old track plate 362 to the other adjacent plate 363 through the handling tool 33 and places the old track plate on the other adjacent plate 363 through the support 53, as shown in fig. 24;

S111) the handling tool 33 is moved to the new track plate 361 and lifted, and the new track plate 361 is lifted to the place to be replaced and the replacement is completed, as shown in fig. 25.

After step S111), the following procedure is also included:

s112) pulling the steel rail 45 back to the original position through the telescopic rod 55, detaching the supporting plate 54, and performing fastener installation, as shown in fig. 26;

s113) the gantry crane 100 lifts the old track plate 362 through the lifting tool 33, and the railcar 50 pulls the second transport flatcar 51 in, as shown in fig. 27;

s114) the handling tool 33 places the old track slab 362 on the second transportation flatcar 51 as shown in fig. 28.

After step S114), the following procedure is also included:

s115) the rail car 50 pulls the second transportation flat car 51 away and pulls the first transportation flat car 44 to move below the gantry crane 100 at the final position, and the beam 1 of the gantry crane 100 is aligned with the groove 28 of the rotary mount 200;

s116) the leg 5 of the gantry crane 100 is contracted, the swivel mount 200 is lifted up until the cross beam 1 enters the groove 28 of the swivel mount 200 and is fixed;

s117) continuing to retract the leg 5 of the gantry crane 100 to the starting position, the leg 5 moving along the beam 1 to the starting position;

s118) repeatedly executing steps S115) to S117), and completing the recovery process of the rest of gantry cranes 100, as shown in fig. 29;

S119) the rotary mount 200 rotates 90 ° until the gantry crane 100 is longitudinally fixed, and the railcar 50 pulls the first transport flatcar 44 and the second transport flatcar 51 away, as shown in fig. 30.

The lifting tool 33 comprises a lifting beam 34, a longitudinal moving mechanism 35, a lifting ring 39 and a traction mechanism 40. The lifting mechanism 4 includes a hook 56 capable of vertically lifting, and a hanging ring 39 is provided on the upper portion of the hanging beam 34, and the hook 56 is connected to the hanging ring 39. A vertical movement mechanism 35 is movably provided at a lower portion of the hanging beam 34 for hanging the track plate 36. After a plurality of gantry cranes 100 are deployed to the proper positions, the track slab 36 is lifted by the vertical movement mechanism 35. When the track plate 36 is lifted, the longitudinal moving mechanism 35 is driven by the traction mechanism 40 to move back and forth on the hanging beam 34 along the line direction, so that the track plate 36 is lifted to a specified longitudinal position.

The lifting fixture 33 further comprises a chain wheel 37, a chain 38, a hanging chain 41 and a pulley 42, and rails 43 are arranged on the left side and the right side of the bottom of the hanging beam 34 along the line direction. The vertical movement mechanism 35 lifts the rail plate 36 by the hoist chain 41, and the vertical movement mechanism 35 moves vertically on the rail 43 by the pulley 42. Sprockets 37 are provided at both ends of the hanging beam 34 in the line direction, and the two sprockets 37 are connected by a chain 38. The chain 38 is connected with the longitudinal moving mechanism 35, one of the chain wheels 37 is driven to rotate by the traction mechanism 40, and the chain wheel 37 rotates to drive the chain 38 to move along the line direction, so that the track plate 36 longitudinally moves.

The gantry crane 100 further comprises a sliding frame 2 and a hoisting mechanism 4, wherein the sliding frame 2 is movably arranged at the left end and the right end of the beam 1, and the sliding frame 2 can transversely move along the beam 1. A hoisting mechanism 4 is arranged on the cross beam 1 between the two sliding frames 2, and the hoisting mechanism 4 can transversely move along the cross beam 1. Legs 5 which can extend and retract in the vertical direction are respectively arranged below the two sliding frames 2. A sliding driving mechanism 3 is arranged between the cross beam 1 and the sliding frame 2.

The slide frame 2 is provided with a traversing support 57 with internal threads, and the cross beam 1 is provided with a mounting seat 49. The sliding driving mechanism 3 adopts a power driving screw mechanism, the power driving end of the sliding driving mechanism 3 is fixed on the mounting seat 49, the screw end is connected to the transverse moving support 57, and the sliding frame 2 is driven to realize transverse moving by the rotation of the power driving screw. The sliding frame 2 is internally provided with a wedge-shaped locking mechanism 18, and the wedge-shaped locking mechanism 18 is positioned between the cross beam 1 and the sliding frame 2 and comprises two wedge-shaped sliding blocks which are contacted with each other. After passing through the sliding frame 2, the locking mechanism 48 compresses the two wedge-shaped sliding blocks to lock the position of the sliding frame 2. After the transverse spans of the two support legs 5 are adjusted in place, the position locking of the sliding frame 2 is achieved through the wedge-shaped locking mechanism 18.

The leg 5 further comprises a screw barrel 6, a screw 9, a support 10 and a leg sleeve 11. A screw thread cylinder 6 is connected below the sliding frame 2, a supporting leg sleeve 11 is sleeved below the screw thread cylinder 6, and a support 10 is arranged below the supporting leg sleeve 11. The lifting driving mechanism 7 is arranged in the support 10, the screw rod 9 is arranged in the supporting leg sleeve 11, the upper end of the screw rod 9 is connected with the threaded cylinder 6 through threads, and the lower end of the screw rod 9 is connected with the lifting driving mechanism 7. A bearing 13 is provided between the screw 9 and the support 10. The lifting driving mechanism 7 drives the screw rod 9 to rotate so that the threaded cylinder 6 moves up and down, and the telescopic function of the supporting leg 5 is realized. The lower part of the supporting leg 5 is provided with an adjustable supporting leg 8, and the supporting leg 5 and the gantry crane 100 can be leveled through the adjustable supporting leg 8 in the deployment process of the gantry crane 100.

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 track plate replacement operation method described by the specific embodiment of the invention, the following technical effects can be produced:

(1) According to the track slab replacement operation method described in the specific embodiment of the invention, the gantry crane supporting legs are arranged on two sides of a railway line in a crossing way, adjacent line operation is not required, the safety risk of operation overstepping is avoided, meanwhile, the device is simple in structure, simple in operation, high in reliability, convenient to maintain and overhaul, few in required operators and high in operation efficiency, and large-size track slab component lifting can be realized;

(2) The track plate replacement operation method described by the specific embodiment of the invention is safe and reliable in operation, is suitable for replacing the whole group of track plates and replacing single switch rails, switch centers and the like, can realize the carrying, placement, position adjustment and replacement of various circuit components with different lengths through the combination of a plurality of gantry cranes, and particularly can realize the lifting of large-size track plate components;

(3) According to the track slab replacement operation method described in the specific embodiment of the invention, the gantry crane has the functions of supporting leg transverse movement, lifting and leveling, the supporting leg transverse span spacing and the height from the ground are adjustable, the functions of meeting the requirements of different road ground working conditions can be met, the height of the gantry crane device is adjustable, stable lifting can be ensured, and the risk of touching the overhead line in the lifting process is avoided;

(4) The rail plate replacement operation method described by the specific embodiment of the invention has the advantages that the manufacturing cost of the gantry crane is low, the replacement is quick, the efficiency is high, the gantry crane is longitudinally arranged on a flat car without exceeding the limit of the car during transportation, the lifting tool is provided with the longitudinal movement mechanism, long-distance longitudinal movement of the rail plate can be realized, the rail plate is positioned more accurately, and the technical problems of low safety of the movement of the gantry crane and poor adaptability to the operation environment can be solved;

(5) According to the track slab replacement operation method disclosed by the embodiment of the invention, the lifting tool is provided with the self-propelled longitudinally moving mechanism, so that the technical problems of low safety of gantry crane movement and poor adaptability to an operation environment can be solved; the lifting beam adopts a rectangular tubular structure and high-strength materials, so that the lifting tool has enough rigidity and strength, and the self weight is light, thereby reducing the load of the gantry crane;

(6) According to the track plate replacement operation method disclosed by the embodiment of the invention, the lifting beam of the lifting tool adopts the rectangular hanging, and when the gantry cranes are offset in the longitudinal position, the rectangular hanging is of a sufficient size in the longitudinal direction, so that the lifting hooks can correspondingly move for a certain distance, the offset influence is eliminated, the lifting mechanism of each gantry crane is basically kept parallel, and the lifting stability is ensured.

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 above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention or equivalent embodiments using the method and technical solution disclosed above without departing from the spirit and technical solution of the present invention. Therefore, any simple modification, equivalent substitution, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention, unless departing from the technical solution of the present invention.

Claims (9)

1. The track slab replacement operation method is characterized by comprising the following steps of:

s101) a plurality of gantry cranes (100) are longitudinally fixed on a first transport flat car (44) through a rotary mounting seat (200), a new track plate (361) and a lifting tool (33) are placed on a second transport flat car (51), and transported to a designated position of an operation site through a track car (50);

s102) the rail car (50) pulls the first transportation flatcar (44) to move to the placement position of the first gantry crane (100), and the rotary mounting seat (200) rotates by 90 degrees until the gantry crane (100) is vertical to the line direction;

s103) the rotary mounting seat (200) pulls the gantry crane (100) to descend, and the supporting leg (5) of the gantry crane (100) moves to a designated position along the cross beam (1); the supporting legs (5) extend downwards to be close to the ground, the locking of the rotary mounting seats (200) on the gantry crane (100) is released, the supporting legs (5) continue to extend and level, and the deployment of one gantry crane (100) is completed;

s104) the rail car (50) pulls the first transportation flatcar (44) to sequentially move, and the step S103) is repeatedly executed until all the gantry cranes (100) are deployed to the designated positions;

s105) the rail car (50) pulls the second transportation flatcar (51) to move to a designated position, the gantry crane (100) lifts the lifting tool (33), and the lifting tool (33) moves and lifts a new rail plate (361);

S106) the rail car (50) pulls the first transport flat car (44) and the second transport flat car (51) to leave, and the lifting tool (33) pulls the new rail plate (361) to the adjacent plate (363) of the old rail plate (362) to be replaced;

s107) the lifting tool (33) descends, and a new track plate (361) is placed on the adjacent plate (363);

s108) carrying out fastener disassembly, and utilizing fastener screw holes to install the supporting plates (54) to pull the steel rails (45) to the two sides of the track plate (36);

s109) removing the old track plate (362), and lifting the old track plate (362) by the gantry crane (100) through a lifting tool (33);

s110) the gantry crane (100) moves the old track plate (362) to another adjacent plate (363) through a lifting tool (33) and places the old track plate;

s111) the lifting tool (33) moves to a new track plate (361) and lifts, and the new track plate (361) is lifted to a place to be replaced and the replacement is completed;

s112) pulling the steel rail (45) back to the original position, disassembling the supporting plate (54), and installing fasteners;

s113) the gantry crane (100) lifts the old track plate (362) through a lifting tool (33), and the track car (50) pulls the second transport flat car (51) to drive in;

s114) the lifting tool (33) places an old track plate (362) on the second transport flat car (51);

S115) the rail car (50) pulls the first transportation flatcar (44) to move to the position below the gantry crane (100) at the final position, and the cross beam (1) of the gantry crane (100) is aligned with the groove (28) of the rotary mounting seat (200);

s116) the supporting legs (5) of the gantry crane (100) are contracted, and the rotary mounting seat (200) is lifted to the position that the cross beam (1) enters the grooves (28) of the rotary mounting seat (200) and is fixed;

s117) the supporting leg (5) of the gantry crane (100) continues to shrink to a starting position, and the supporting leg (5) moves to the starting position along the cross beam (1);

s118) repeatedly executing the steps S115) to S117) to finish the recovery process of the rest gantry cranes (100);

s119) the rotary mounting seat (200) rotates for 90 degrees until the gantry crane (100) is longitudinally fixed, and the rail car (50) pulls the first transport flat car (44) and the second transport flat car (51) to leave.

2. The track plate replacement operation method according to claim 1, wherein: the gantry crane (100) further comprises a sliding frame (2) and a lifting mechanism (4), the sliding frame (2) is movably arranged at the left end and the right end of the cross beam (1), and the sliding frame (2) can transversely move along the cross beam (1); a lifting mechanism (4) is arranged on the cross beam (1) between the two sliding frames (2), and the lifting mechanism (4) can transversely move along the cross beam (1); legs (5) which can stretch in the vertical direction are respectively arranged below the two sliding frames (2); a sliding driving mechanism (3) is arranged between the cross beam (1) and the sliding frame (2).

3. The track plate replacement operation method according to claim 2, wherein: a transverse support (57) with internal threads is arranged on the sliding frame (2), and a mounting seat (49) is arranged on the cross beam (1); the sliding driving mechanism (3) adopts a power driving screw mechanism, the power driving end of the sliding driving mechanism (3) is fixed on the mounting seat (49), the screw end is connected to the transverse moving support (57), and the sliding frame (2) is driven to realize transverse moving by the rotation of the power driving screw.

4. A track plate replacement operation method according to claim 3, wherein: a wedge-shaped locking mechanism (18) is arranged in the sliding frame (2), and the wedge-shaped locking mechanism (18) is positioned between the cross beam (1) and the sliding frame (2) and comprises two wedge-shaped sliding blocks which are in contact with each other; the locking mechanism (48) compresses the two wedge-shaped sliding blocks after penetrating through the sliding frame (2) so as to lock the position of the sliding frame (2); when the transverse span of the two supporting legs (5) is adjusted in place, the wedge-shaped locking mechanism (18) is used for realizing the position locking of the sliding frame (2).

5. The track plate replacement operation method according to claim 2, 3 or 4, characterized in that: the support leg (5) comprises a threaded cylinder (6), a screw (9), a support (10) and a support leg sleeve (11); a threaded cylinder (6) is connected below the sliding frame (2), a supporting leg sleeve (11) is sleeved below the threaded cylinder (6), and a support (10) is arranged below the supporting leg sleeve (11); a lifting driving mechanism (7) is arranged in the support (10), a screw rod (9) is arranged in the supporting leg sleeve (11), the upper end of the screw rod (9) is connected with the threaded cylinder (6) through threads, and the lower end of the screw rod is connected with the lifting driving mechanism (7); the lifting driving mechanism (7) drives the screw rod (9) to rotate so that the threaded cylinder (6) moves up and down, and the telescopic function of the supporting leg (5) is realized.

6. The track plate replacement operation method according to claim 5, wherein: a bearing (13) is arranged between the screw (9) and the support (10).

7. The track plate replacement operation method according to claim 2, 3, 4, or 6, characterized in that: the lifting tool (33) comprises a lifting beam (34), a longitudinal moving mechanism (35), a lifting ring (39) and a traction mechanism (40); the lifting mechanism (4) comprises a lifting hook (56) capable of lifting vertically, the lifting ring (39) is arranged on the upper part of the lifting beam (34), and the lifting hook (56) is connected with the lifting ring (39); the longitudinal moving mechanism (35) is movably arranged at the lower part of the hanging beam (34) and is used for hanging the track plate (36); after a plurality of gantry cranes (100) are deployed to proper positions, the track plate (36) is lifted by the longitudinal moving mechanism (35); when the track plate (36) is lifted, the longitudinal moving mechanism (35) is driven by the traction mechanism (40) to move back and forth on the lifting beam (34) along the line direction, so that the track plate (36) is lifted to a specified longitudinal position.

8. The track plate replacement operation method according to claim 7, wherein: the lifting tool (33) further comprises a chain wheel (37), a chain (38), a hanging chain (41) and a pulley (42), wherein rails (43) are arranged on the left side and the right side of the bottom of the hanging beam (34) along the line direction; the longitudinal moving mechanism (35) is used for lifting the track plate (36) through a lifting chain (41), and the longitudinal moving mechanism (35) longitudinally moves on the track (43) through a pulley (42); sprocket wheels (37) are arranged at two ends of the hanging beam (34) along the line direction, and the two sprocket wheels (37) are connected through a chain (38); the chain (38) is connected with the longitudinal moving mechanism (35), one of the chain wheels (37) is driven to rotate through the traction mechanism (40), and the chain wheel (37) is driven to move along the line direction by rotation of the chain wheel (37), so that the longitudinal movement of the track plate (36) is realized.

9. The track plate replacement operation method according to claim 1, 2, 3, 4, 6, or 8, characterized in that: the lower part of the supporting leg (5) is provided with an adjustable supporting leg (8), and the supporting leg (5) and the gantry crane (100) can be leveled through the adjustable supporting leg (8) in the deployment process of the gantry crane (100).