CN114941263A

CN114941263A - Railroad switch replacement operation method

Info

Publication number: CN114941263A
Application number: CN202210532083.3A
Authority: CN
Inventors: 李石平; 晏红文; 陈亮陪; 卢云波; 朱利君; 吴青考; 罗前星
Original assignee: Zhuzhou CSR Times Electric Co Ltd
Current assignee: Zhuzhou CRRC Times Electric Co Ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-08-26
Anticipated expiration: 2042-05-07
Also published as: CN114941263B

Abstract

The invention discloses a turnout replacement operation method, wherein a plurality of gantry cranes are longitudinally fixed on a first transport flat car through rotary mounting seats, new turnouts and hoisting tools are placed on a second transport flat car and are transported to an operation site through traction of a rail car. The first transport flat car moves to the placing position of the first gantry crane, and the rotary mounting seat rotates by 90 degrees. The gantry cranes get off and are arranged to the designated positions, and the first transport flat cars move sequentially until all the gantry cranes are arranged to the designated positions. And the second transport flat car moves to a specified position, the hoisting tool is connected with the gantry crane and the new turnout in a hanging manner, and the new turnout is hoisted. The rail car pulls the first transport flat car and the second transport flat car to drive away from the replacement operation area, the group cranes are carried out through the plurality of gantry cranes to transversely move the new turnout to one side close to the supporting legs for placement, and then the turnout replacement operation is completed through the group cranes. The turnout replacing method can solve the technical problems that the existing turnout replacing method is low in operation safety and cannot lift large-size turnout parts.

Description

Railroad switch replacement operation method

Technical Field

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

Background

The ballastless track turnout of the high-speed rail is an important part of a passenger special line, is an object of line key maintenance and is one of wearing parts, and needs to be maintained and repaired frequently or replaced regularly. The switch mainly comprises a switch rail, a curve transition section, a switch core and a guard rail. The turnout center, the switch rail and the like are main parts of the turnout, and the turnout center, the switch rail and the like are mainly characterized by long size, heavy weight and difficult manual replacement. The turnouts of the passenger dedicated line in China mainly have two types, namely 18 turnouts and 42 turnouts, and the length of the 42 turnout is nearly twice of that of the 18 turnout. At present, the turnout replacement equipment applied in China mainly adopts the following two modes:

the first mode is to use a flat car as a transportation tool, hoist the flat car from an adjacent line by using a 25T hoisting rail car, and replace the flat car by manually pulling and pulling the rail. This approach has a number of disadvantages: if the crane boom is easy to scrape and touch a contact network, hidden damage to a new rail part is easy to cause, the adjacent line space is occupied, the construction efficiency is low, the skylight occupation time is long, and the large-size turnout part is difficult to lift.

The second way is to adopt special replacement equipment for turnout parts, namely to refit two platforms and respectively equip movable cantilever cranes. However, the two cantilever cranes are used for independently hoisting new and old turnout parts respectively, and the turnout parts have large external dimensions, so the main disadvantages of the mode are that: the cost is high, the safety is low, and large-size turnout parts cannot be hoisted.

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

the prior art 1 is applied by the engineering machinery limited company of the time of baby chicken middle school bus in 2018, 02/01/2019, and published in 2019, 03/01/CN 109403161A, and is applied to construction technology for replacing turnout of large-tonnage lifting rail car. The invention discloses a construction process for replacing turnouts of a large-tonnage lifting rail car, which comprises the following specific steps of: firstly, before a new turnout is installed on a turnout bed, a pre-paving and moving method is adopted to carry out sectional and integral assembly on the turnout; before installing a new turnout, a hoisting rail car is used as main turnout dismantling equipment to dismantle an old turnout and clean a track bed; thirdly, after the assembly of the new turnout is finished, a hoisting rail car is used as main turnout transfer equipment to transfer the new turnout to the position to be installed; and fourthly, after the new turnout is transported to a position near the installation position, the lifting rail car is adopted as main turnout installation equipment to be accurately installed to the corresponding position of the track bed. The method is used for integrally replacing the grouped turnouts, the weight and the size of the grouped turnouts are large, a hoisting rail car is adopted for operation, a large safety risk exists, a contact net is easy to touch, in addition, the turnouts are unstable in the hoisting process, and the rail car has the possibility of overturning. Meanwhile, the method requires more personnel, and has high labor intensity and low efficiency.

Prior art 2 is applied for high and new equipment of iron construction, ltd, china, in 2016, 15/08, and announced in 2017, 06/06, with publication number CN206219916U, a rapid replacement device for large parts of railroad switches. The utility model discloses a railway switch major-part quick replacement equipment, it includes at least a set of load-bearing platform, and this load-bearing platform below is equipped with and walks capable mechanism, and load-bearing frame is equipped with to this load-bearing platform top, and this load-bearing frame connects flexible quick-witted roof beam, and this flexible quick-witted roof beam is connected and is slided hoisting machine structure, and actuating mechanism still is equipped with to flexible quick-witted roof beam, the one end linking frame hinge roof beam of flexible quick-witted roof beam to can be based on this frame hinge roof beam rotation or lateral shifting, load-bearing platform still connects one set at least stable strutting arrangement, and one set at least front end strutting arrangement is connected to flexible quick-witted roof beam front end. However, the equipment has a large and complex structure and high cost, only small turnout parts with small sizes can be replaced, and large turnout parts with the lengths of tens of meters cannot be replaced due to size limitation.

The prior art 3 is a method for changing and laying railway switches and a railway switch laying machine set thereof applied by medium-iron heavy industry limited companies and medium-iron science group limited companies in 2013, 05.01.2013, and published in 2013, 05.01.20132, which is a chinese invention with publication number CN 103074829A. The invention discloses a railway track laying unit, which comprises a main machine, an auxiliary machine and a hydraulic reloading frame, wherein the main machine comprises a main machine flat car, a machine arm, a front upright column gantry structure, a rear upright column gantry structure, a crane trolley, a hoisting mechanism and a traveling mechanism, and the auxiliary machine at least comprises an auxiliary machine flat car; the hydraulic reloading frame comprises a first reloading frame, a second reloading frame and a reloading lifting appliance. However, the unit has a large and complex structure and high cost; the transportation of the whole set of equipment is difficult, the required equipment is more, and the construction management is difficult; only small turnout parts with small size can be replaced, and longer large turnout parts cannot be replaced due to size limitation.

Disclosure of Invention

In view of the above, the present invention aims to provide a turnout replacement method to solve the technical problems of the existing turnout replacement method that the operation safety is low and the large-size turnout component cannot be lifted.

In order to achieve the above object, the present invention specifically provides a technical implementation scheme of a switch replacement operation method, which comprises the following steps:

s101) longitudinally fixing a plurality of gantry cranes on a first transport flat car through a rotary mounting seat, placing a new turnout and a hoisting tool on a second transport flat car, and carrying the turnout and the hoisting tool to a specified position of an operation site through traction of a rail car;

s102) the rail car pulls the first transport flat car to move to the placing position of the first gantry crane, and the rotary mounting base rotates for 90 degrees until the gantry crane is vertical to the line direction;

s103) moving the support legs of the gantry crane to an appointed position along the cross beam, and driving the gantry crane to descend by the rotary mounting base; the supporting legs extend downwards to be close to the ground, the locking of the gantry crane by the rotary mounting base is released, the supporting legs continue to extend and level, and the deployment of the gantry crane is completed;

s104) the rail car pulls the first transport flat car to move in sequence, and the step S103) is repeatedly executed until all gantry cranes are deployed to the designated positions;

s105) the rail car pulls the second transport flat car to move to a specified position, the lifting tool is connected with the gantry crane and the new turnout in a hanging mode, and the new turnout is lifted;

s106) the rail car pulls the first transport flat car and the second transport flat car to drive away from the replacement operation area, and the new turnout is transversely moved to one side close to the supporting legs to be placed through group hoisting of a plurality of gantry cranes.

Further, the following process is also included after the step S106):

s107) cutting the steel rail, removing the fastener and removing the old turnout;

s108) moving the hoisting tool to an old turnout through the gantry crane, hanging and hoisting the turnout, and placing the old turnout on a supporting leg close to the other side of the gantry crane;

s109) moving the hoisting tool to a new turnout through the gantry crane, and performing hanging hoisting, and placing the new turnout at the position of an old turnout; and welding the new turnout and the steel rail, installing a fastener, and completing the restoration of the line.

Further, the following process is also included after the step S109):

s110) moving the hoisting tool to the old turnout by the gantry crane and hanging and hoisting;

s111) the rail car pulls a second transport flat car to drive in;

and S112) moving the old turnout and placing the old turnout at the specified position of the second transport flat car through the lifting tool.

Further, the following process is also included after the step S112):

s113) the rail car pulls the first transport flat car to move to the position below the gantry crane at the last position, and the beam of the gantry crane is aligned to the position of the groove of the rotary mounting seat;

s114) the supporting legs of the gantry crane are contracted to the cross beam, enter the groove of the rotary mounting seat and are fixed;

s115) the supporting legs of the gantry crane continuously contract to the initial position, and the supporting legs move to the initial position along the cross beam;

s116) repeating the steps S113) to S115), and finishing the recovery process of the rest gantry cranes;

and S117) the rotary mounting seat rotates to the gantry crane to be longitudinally fixed, and the rail car pulls the first transport flat car and the second transport flat car to drive away.

Further, the handling frock includes carrier bar, mounting bracket, rings and lifting claw. The lifting mechanism comprises a lifting hook capable of vertically lifting, the lifting ring is arranged on the upper portion of the bearing beam, and the lifting hook is connected with the lifting ring. The mounting bracket is arranged at the lower part of the bearing beam, and the lifting claws are arranged at the left side and the right side of the mounting bracket along the line direction. And when the gantry crane carries out hoisting operation, the turnout is hoisted through the hoisting claw. After the turnout is hoisted, the turnout is hoisted to a specified longitudinal position by moving the turnout back and forth on the bearing beam along the line direction through the mounting frame.

And furthermore, the mounting rack is movably connected with the bearing beam, chain wheels are arranged at two ends of the bearing beam along the line direction, and the two chain wheels are connected through a chain. The chain is connected with the mounting rack, one of the chain wheels is driven to rotate through the longitudinal movement mechanism, and the chain wheels rotate to drive the chain to move along the line direction, so that the longitudinal movement of the mounting rack is realized.

Furthermore, the gantry crane further comprises a sliding frame and a hoisting mechanism, the sliding frame is movably arranged at the left end and the right end of the cross beam, and the sliding frame can move transversely along the cross beam. And a hoisting mechanism is arranged on the cross beam between the two sliding frames and can move transversely along the cross beam. And supporting legs which can stretch out and draw back 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.

Furthermore, a transverse moving 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-driven lead screw mechanism, a power driving end of the sliding driving mechanism is fixed on the mounting seat, a lead screw end is connected to the transverse moving support, and the sliding frame is driven to move transversely by the rotation of the power-driven lead screw.

Furthermore, a wedge-shaped locking mechanism is arranged in the sliding frame, is positioned between the cross beam and the sliding frame and comprises two wedge-shaped sliding blocks which are in mutual contact. After the locking mechanism penetrates through the sliding frame, the two wedge-shaped sliding blocks are compressed to lock the position of the sliding frame. And when the transverse span of the two support legs is adjusted in place, the position of the sliding frame is locked by the wedge-shaped locking mechanism.

Further, the landing leg includes screw thread section of thick bamboo, screw rod, support and 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. And a lifting driving mechanism is arranged in the support, a screw rod is arranged in the supporting leg sleeve, 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 arranged between the screw and the support.

Furthermore, adjustable support legs are arranged at the lower parts of the support legs, and in the deployment process of the gantry crane, the support legs and the gantry crane can be leveled through the adjustable support legs.

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

(1) according to the turnout replacement operation method, the support legs of the gantry crane are arranged on two sides of a railway line in a spanning manner, adjacent line operation is not required, the safety risk of exceeding the limit of operation does not exist, and meanwhile, the device is simple in structure, high in reliability, convenient to maintain and overhaul and high in operation efficiency, and can realize lifting of large-size turnout parts;

(2) the turnout replacement operation method is suitable for replacing the whole set of turnouts and replacing single switch rails, turnout centers and the like, and can realize the transportation, placement, position adjustment and replacement of various line components with different lengths through the combination of a plurality of gantry cranes, particularly can realize the lifting of large-size turnout components;

(3) according to the turnout replacing operation method, the gantry crane has the functions of transversely moving, lifting and leveling the support legs, the transverse span distance and the ground distance height of the support legs are adjustable, the ground working condition requirements of different lines can be met, the height of the gantry crane is adjustable, and the risk of touching a contact net is avoided in the hoisting process;

(4) the turnout replacement operation method has the advantages that the manufacturing cost of the gantry crane is low, the number of operators is small, the replacement is rapid, the efficiency is high, the gantry crane is longitudinally arranged on a flat car during transportation and does not exceed the limit of the car, and the lifting tool hanging point can realize longitudinal movement so that the turnout is more accurately positioned.

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 obvious that the drawings in the following description are only some embodiments of the invention, from which other embodiments can be derived by 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 switch changing apparatus on which the method of the present invention is based;

FIG. 2 is a schematic front view of a gantry crane in one embodiment of a switch changing apparatus on 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 switch changing apparatus on which the method of the present invention is based;

FIG. 4 is a perspective side view of a gantry crane in one embodiment of a switch changing apparatus on which the method of the present invention is based;

FIG. 5 is a schematic top view of a gantry crane in one embodiment of a switch changing apparatus on which the method of the present invention is based;

FIG. 6 is a schematic view of a lifting tool in one embodiment of a switch changing device on which the method of the present invention is based;

FIG. 7 is a schematic side view of a lifting tool in one embodiment of a switch replacing device on which the method of the present invention is based;

FIG. 8 is a schematic perspective view of a lifting tool in another embodiment of a turnout replacement device on which the method of the present invention is based;

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

FIG. 10 is a simplified schematic illustration of the configuration of the swivel mount of one embodiment of the switch replacement system on 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 switch replacement system on which the method of the present invention is based;

FIG. 12 is a bottom view of a rotary mounting base in one embodiment of a switch replacement system on which the method of the present invention is based;

FIG. 13 is a schematic side view of a swivel mount of one embodiment of a switch replacement system on which the method of the present invention is based;

FIG. 14 is a schematic side view of a rotary mount of an embodiment of a switch replacement system in which the method of the present invention is based, from another perspective;

FIG. 15 is a schematic side view of a switch replacement system in accordance with one embodiment of the present invention;

FIG. 16 is a schematic top view of a switch replacement system in accordance with one embodiment of the present invention;

fig. 17 is a schematic view of a transporting step of a gantry crane in a side view in a specific embodiment of a turnout replacement operation method of the present invention;

fig. 18 is a schematic view of a gantry crane transportation step in a top view in one embodiment of a turnout replacement operation method of the present invention;

FIG. 19 is a schematic view from a side view of the rotation to traverse step of the gantry crane in one embodiment of the switch replacement method of the present invention;

FIG. 20 is a schematic top view of a gantry crane rotating to traverse in one embodiment of a switch replacement operation method of the present invention;

FIG. 21 is a schematic view of a step of a gantry crane to get on and off the vehicle in a side view in a specific embodiment of a turnout replacement method of the present invention;

FIG. 22 is a schematic view of a step of a gantry crane to get on and off the vehicle in a top view in one embodiment of a turnout replacement method of the present invention;

FIG. 23 is a side view of a new switch lifting step in one embodiment of the switch replacement operation method of the present invention;

FIG. 24 is a schematic top view of a new switch lifting step in one embodiment of the switch replacement operation method of the present invention;

FIG. 25 is a side view of a new switch placement step in one embodiment of the switch replacement operation method of the present invention;

FIG. 26 is a schematic top view of the new switch placement step in one embodiment of the switch replacement operation method of the present invention;

FIG. 27 is a schematic top view of the old switch removal step in one embodiment of the switch replacement method of the present invention;

FIG. 28 is a schematic top view of the old switch hoist placement step in one embodiment of the switch replacement method of the present invention;

FIG. 29 is a schematic top view of the new switch installation step in one embodiment of the switch replacement method of the present invention;

FIG. 30 is a schematic view of the old turnout lifting step from a side view in one embodiment of the turnout replacement method of the present invention;

FIG. 31 is a schematic top view of the old switch lifting step in one embodiment of the switch replacement method of the present invention;

FIG. 32 is a schematic top plan view of the old switch placement to flat car step in one embodiment of the switch replacement method of the present invention;

FIG. 33 is a side view of a flat car traveling to a gantry crane retrieval position in accordance with one embodiment of the switch replacement method of the present invention;

FIG. 34 is a schematic top view of the steps of the switch replacement method of the present invention in which the flatcar is driven to the gantry crane retrieving position;

FIG. 35 is a schematic view of a side view of a gantry crane recovery to flat car procedure in one embodiment of a turnout replacement method of the present invention;

FIG. 36 is a schematic top view of a gantry crane retrieval to flatcar procedure in one embodiment of a switch replacement operation method of the present invention;

FIG. 37 is a schematic view from a side view of the step of rotating the gantry crane to a longitudinally fixed position in one embodiment of the switch replacement operation method of the present invention;

FIG. 38 is a top view of a gantry crane rotated to a longitudinally fixed position in one embodiment of a switch replacement operation method of the present invention;

in the figure: 1-a cross beam, 2-a sliding frame, 3-a sliding drive mechanism, 4-a hoisting mechanism, 5-a support leg, 6-a threaded cylinder, 7-a lifting drive mechanism, 8-an adjustable support leg, 9-a screw, 10-a support, 11-a support leg sleeve, 12-a power supply cabinet, 13-a bearing, 14-a first distance sensor, 15-a second distance sensor, 16-a force sensor, 17-an inclination sensor, 18-a wedge locking mechanism, 19-a lifting seat, 20-a rotary bearing, 21-a fixed mounting seat, 22-a locking seat, 23-a guide post seat, 24-a lifting mechanism, 25-a guide post, 26-a locking mechanism, 27-a sliding mechanism, 28-a groove, 29-a stop, 30-a guide protrusion, 31-guide groove, 32-rotary driving mechanism, 33-lifting tool, 34-turnout, 35-track plate, 36-bearing beam, 37-mounting rack, 38-lifting ring, 39-lifting claw, 40-track vehicle, 41-first transport flat vehicle, 42-second transport flat vehicle, 43-power device, 44-new turnout, 45-steel rail, 46-base, 47-roadbed, 48-longitudinal moving mechanism, 49-fixing seat, 50-chain wheel, 51-chain, 52-locking mechanism, 53-mounting seat, 54-transverse moving support, 55-lifting hook, 56-old turnout, 57-base plate, 100-gantry crane and 200-rotary mounting seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 38, a specific embodiment of the switch replacement method of the present invention is shown, and the present invention will be further explained with reference to the drawings and the specific embodiment.

Example 1

In order to solve the technical problems of the existing hoisting equipment for the railway line, embodiment 1 provides a turnout replacing device based on hoisting of a gantry crane 100, which has the advantages of simple structure, low cost and convenient and fast operation. The turnout replacing device can utilize skylight time, and a transporting flat car is adopted to transport the gantry crane 100, the hoisting tool 33, objects needing operation and the like to an operation site for hoisting operation.

As shown in fig. 1 to fig. 9, an embodiment of a switch changing device based on the method of the present invention specifically includes a gantry crane 100, where the gantry crane 100 further includes:

a cross beam 1;

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

the hoisting mechanism 4 is arranged on the cross beam 1, is positioned between the two sliding frames 2 and can transversely move along the cross beam 1 so as to adjust the hoisting position of the turnout 34;

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

As shown in fig. 9, when the gantry crane 100 is deployed from the first transport flat car 41 to the railway line, the gantry crane 100 is supported on the roadbed 47 at both sides of the railway line by the support legs 5, the roadbed 47 is provided with the base 46, the base 46 is provided with the track plate 35, and the steel rail 45 is arranged on the track plate 35. The total height H of the gantry crane 100 is more than or equal to the height H1 between the bottom plate 57 of the first transport flat car 41 and the rail surface of the steel rail 45, the height H2 between the rail surface of the steel rail 45 and the roadbed 47 and the clearance H3 of the hoisting mechanism 4. The clearance H3 of the hoisting mechanism 4 is the distance from the hook 55 of the gantry crane 100 to the beam 1 in the highest position.

As shown in fig. 2, the lower portion of the supporting leg 5 is further provided with an adjustable supporting leg 8, and the leveling function of the supporting leg 5 and the gantry crane 100 can be realized through the adjustable supporting leg 8. The cross beam 1 is provided with an inclination sensor 17, inclination state data of the gantry crane 100 are obtained through the inclination sensor 17, and the leveling of the cross beam 1 is realized 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 multiple gantry cranes 100 lift the turnout 34. When the gantry cranes 100 perform lifting operation, the first distance sensor 14 acquires 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 that the transverse positions of the turnouts 34 can be aligned when the gantry cranes 100 synchronously lift the turnouts 34.

And 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 distance between the adjacent gantry cranes 100 so as to meet the requirement on the parallelism between the beams 1 of the two gantry cranes 100. After the first gantry crane 100 is deployed in place, the later deployed gantry crane 100 acquires the distance between the adjacent gantry cranes 100 through the second distance sensors 15 arranged on the two sliding frames 2 or the supporting legs 5, and the rotation angle of the rotary mounting base 200 is adjusted to meet the requirement of parallelism between the beams 1 of the two gantry cranes 100.

The hoisting mechanism 4 is further provided with a force sensor 16 to realize the stability control of the turnout 34 by a plurality of gantry cranes 100. When the gantry crane 100 starts to hoist the new turnout 44 or the old turnout 56, the hoisting mechanism 4 of each gantry crane 100 takes the acquisition value of the force sensor 16 at that time as a reference value. If the variation value in the subsequent hoisting process exceeds the standard value, the motor rotating speed of the hoisting mechanism 4 is adjusted, so that the acquired value of the force sensor 16 of the hoisting mechanism 4 in the hoisting process is maintained to be basically equivalent to the reference value, and the vertical stability control of the multiple gantry cranes 100 during the synchronous hoisting of the turnout 34 is realized.

The gantry crane 100 further comprises a sliding driving mechanism 3, the sliding frame 2 is sleeved on the beam 1, one end of the sliding driving mechanism 3 is arranged on the 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 traversing support 54 with internal threads, and the crossbeam 1 is provided with a mounting seat 53. The sliding driving mechanism 3 adopts a power-driven screw mechanism, a power driving end of the sliding driving mechanism 3 is fixed on the mounting seat 53, a screw end is connected to the transverse moving support 54, and the sliding frame 2 is driven to move transversely by the rotation of the power-driven 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 located 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 the locking mechanism 52 penetrates through the sliding frame 2, the two wedge-shaped sliding blocks are pressed tightly to lock the position of the sliding frame 2. When the transverse span of the two support legs 5 is adjusted in place, the position of the sliding frame 2 is locked by the wedge-shaped locking mechanism 18.

The leg 5 further comprises a threaded barrel 6, a screw 9, a seat 10 and a leg sleeve 11. The threaded cylinder 6 is connected below the sliding frame 2, the lower part of the threaded cylinder 6 is sleeved with the supporting leg sleeve 11, and the support 10 is arranged below the supporting 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 thread cylinder 6 through threads, and the lower end of the screw rod 9 is connected with the lifting driving mechanism 7. A lifting driving mechanism 7 is arranged in the support 10, and the lifting driving mechanism 7 drives the screw rod 9 to rotate so as 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. 7 and 8, the switch replacing device further comprises a lifting tool 33, and the lifting tool 33 further comprises a load beam 36, a mounting frame 37, a lifting ring 38 and a lifting claw 39. The hoisting mechanism 4 includes a hook 55 capable of vertically moving, and the hoisting ring 38 is disposed on the upper portion of the load beam 36, and the hook 55 is connected to the hoisting ring 38. The mounting bracket 37 is provided at a lower portion of the load beam 36, and the lifting claws 39 are provided at left and right sides of the mounting bracket 37 in a line direction (direction L shown in fig. 7 and 8). The lifting ring 38 at the upper end of the lifting tool 33 can be connected with a plurality of lifting hooks 55 of the gantry crane 100 through a lifting belt or a hook, and the lower end of the lifting tool can be connected with the turnout 34 through a plurality of lifting points, as shown in fig. 6. The mounting frame 37 has a longitudinal movable function, and can move back and forth along the line direction relative to the carrier beam 36 after the switch 34 is lifted, so as to solve the problem of accurate positioning of the switch 34.

When the gantry crane 100 performs the lifting operation, the switch 34 is lifted by the lifting claw 39. After the turnout 34 is hoisted, the turnout 34 is hoisted to a specified longitudinal position by moving the turnout 34 back and forth on the load beam 36 in the direction of the line through the mounting frame 37. The mounting frame 37 is movably connected with the carrier beam 36, chain wheels 50 are arranged at two ends of the carrier beam 36 along the line direction, and the two chain wheels 50 are connected through a chain 51. The chain 51 is connected with the mounting bracket 37, one of the chain wheels 50 is driven to rotate by the longitudinal movement mechanism 48, and the chain wheel 50 rotates to drive the chain 51 to move back and forth along the line direction, so that the longitudinal movement (the direction shown as L in fig. 7 and 8) of the mounting bracket 37 is realized, and the problem of accurate positioning of the turnout 34 is solved.

The switch changing device described in embodiment 1 has the support legs 5 that are vertically telescopic and can slide on the cross beam 1 to adjust the span and height of the gantry crane 100 to adapt to different field conditions and the change of switches 34 with different sizes. The supporting legs 5 adopt a rotatable and leveling mechanism and are realized by adopting oil cylinders or electric screw rods and the like. The hoisting mechanism 4 can be a hoist or other hoist.

Example 2

In order to solve the problems of replacement of turnout components of the existing railway line, especially a ballastless track of a high-speed rail, embodiment 2 provides a multi-gantry crane hoisting turnout replacement system based on embodiment 1, which has the advantages of simple structure, low cost and convenience and quickness in operation. The turnout replacement system utilizes skylight time, adopts a transport flat car to transport the gantry crane 100, the lifting tool 33 and the new turnout 44 to an operation site, and carries out lifting and replacement of the new turnout after the gantry crane is placed at a proper position, and then transports the old turnout 56 away from the operation site.

As shown in fig. 15 and fig. 16, an embodiment of a switch changing system based on the method of the present invention specifically includes:

a rail car 40, a first transport flat car 41 and a second transport flat car 42;

a gantry crane 100 arranged on the first transport flat car 41 in the transport state as described in embodiment 1;

a rotary mounting base 200 which is arranged on the first transport flat car 41 in a transport state and is used for fixing the gantry crane 100;

the lifting tool 33 and the turnout 34 are arranged on the second transport flat car 42 in the transport state.

The transportation adopts rail car 40 to haul temporarily, one modified flat car (namely, a first transportation flat car 41) transports a plurality of gantry cranes 100, and two common flat cars (namely, a second transportation flat car 42) transport new and old switches, as shown in the attached fig. 15 and the attached fig. 16. The rail car 40, the first transport flat car 41 or the second transport flat car 42 is further provided with a power device 43 for providing power to the rotary mounting base 200. The power unit 43 can be of different types: the electric motor is driven by a battery or a generator, and the actuating mechanism can be electrically driven or hydraulically driven. A single drive or a centralized, unified power drive mode may be employed for each rotary mount 200.

In the operating state, a plurality of gantry cranes 100 are arranged at intervals along the railway line (as shown by L in fig. 15 and 16) and straddle the roadbed 47 on both sides of the steel rail 45. The upper part of the lifting tool 33 is connected with the lifting hooks 55 of the multiple gantry cranes 100 through the lifting rings 38, and the lower part of the lifting tool 33 is connected with the turnout 34 through the multiple lifting claws 39. After the switch 34 is lifted, the mounting frame 37 is driven by the longitudinal moving mechanism 48 to move back and forth along the line direction relative to the load-bearing beam 36, so that the switch 34 is accurately positioned in the longitudinal direction.

The switch replacement system described in embodiment 2 adopts a group-lifting manner of a plurality of (generally 3 to 5) gantry cranes 100, and transports 3 to 5 gantry cranes 100, a lifting tool 33, and a new switch 44 to a working site by a rail flat car (including a rail car 40, a first transport flat car 41, and a second transport flat car 42), and the gantry cranes 100 get off to specified positions in sequence according to positions and sequences. Then, the new turnout 44 is unloaded by the group crane and the special hoisting tool 33 and is placed below the gantry crane 100. The old switch 56 is removed and replaced by the gantry crane 100. After the line is recovered, the old turnout 56 is lifted to the second transport flat car 42, and the multiple gantry cranes 100 are sequentially loaded and fixedly driven away.

Example 3

As shown in fig. 10 to 14, a rotary mounting base 200 applied to the switch changing system of embodiment 2 is used for fixing a plurality of groups of gantry cranes 100 on a first transport flat car 41 and sequentially deploying the gantry cranes at specified positions of a track, and specifically comprises:

the fixed mounting seat 21 is fixed on the first transport flat car 41, and the base of the fixed mounting seat 21 is fixed on the bottom plate 57 of the first transport flat car 41;

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 that the gantry crane 100 goes up and down on the first transport flat car 41;

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

When in the transportation state, the gantry crane 100 is longitudinally fixed on the lifting seat 19. When in the deployed state, gantry crane 100 is adjusted to the transverse disposition by rotating slewing bearing 20. The rotation mounting base 200 further comprises a rotation driving mechanism 32, one end of the rotation driving mechanism 32 is fixedly mounted on the fixed mounting base 21, and the other end of the rotation driving mechanism realizes a rotation function through the gear rotation driving slewing bearing 20 with a gear on the outer ring.

The rotary mounting base 200 further comprises a locking base 22 arranged on the lifting base 19, the locking base 22 is provided with a plurality of grooves 28 for fixing the gantry crane 100, and the h-shaped beam 1 of the gantry crane is clamped and fixed through the grooves 28. And locking mechanisms 26 are arranged on the side surfaces of the locking seats 22 and close to each pair of grooves 28, and after the beam 1 of the gantry crane 100 is fixed in the grooves 28, the gantry crane 100 is locked and installed in the grooves 28 through the compression of the beam 1 by the locking mechanisms 26.

The rotation mounting base 200 further includes a guide post base 23 disposed on the rotary bearing 20, an inner ring of the rotary bearing 20 is fixedly mounted on the guide post base 23 through a bolt, and an outer ring of the rotary bearing 20 is fixedly mounted on the fixed mounting base 21 through a bolt. The guide post base 23 is provided with a guide post 25, the guide post 25 passes through a through hole formed on the lifting base 19, and when the lifting mechanism 24 performs telescopic motion, the guide post 25 realizes lifting and guiding of the lifting base 19.

The rotary mounting base 200 further comprises a lifting mechanism 24, one end of the lifting mechanism 24 is fixedly mounted on the guide post base 23, the other end of the lifting mechanism 24 is connected to the lifting base 19, and the lifting function of the gantry crane 100 is realized through the telescopic motion of the lifting mechanism 24. Two sliding mechanisms 27 are arranged on the locking base 22 opposite to each other, a stop part 29 is arranged on the lifting base 19 opposite to the sliding mechanisms 27, and the movable end of the sliding mechanism 27 is contacted with the stop part 29. When the movable end of one of the sliding mechanisms 27 is extended, the movable end of the other sliding mechanism 27 is contracted, so as to drive the locking base 22 to slide relative to the lifting base 19 along the moving direction of the sliding mechanism 27. Two guide protrusions 30 are formed on the elevating base 19 to face each other in the movement direction of the slide mechanism 27, and two guide grooves 31 corresponding to the guide protrusions 30 are formed on the locking base 22. The guide groove 31 is slid on the guide projection 30 to guide the relative sliding movement between the locking base 22 and the elevating base 19.

Before the transportation of the gantry crane 100, the fixed mounting base 21 is fixed on the bottom plate 57 of the first transport flat car 41, the slewing bearing 20 is disposed between the fixed mounting base 21 and the lifting base 19, and the locking base 22 is disposed on the lifting base 19. The lifting base 19 moves up and down relative to the fixed mounting base 21, so that the gantry crane 100 can move up and down the first transport flat car 41. The lifting base 19 can perform horizontal rotation movement relative to the fixed mounting base 21 through the slewing bearing 20, so as to adjust the mounting direction of the gantry crane 100.

When in a transportation state, the gantry crane 100 is longitudinally locked and installed in the groove 28 of the fixed installation base 21, and the beam 1 of the gantry crane 100 is pressed and locked through the locking mechanism 26. After the working site is reached, the lifting mechanism 24 drives the gantry crane 100 to ascend to the highest point, the rotary driving mechanism 32 drives the gantry crane 100 to rotate transversely, and the lifting mechanism 24 drives the gantry crane 100 to descend to the working surface. When the support legs 5 of the gantry crane 100 are lowered to the designated positions, the locking mechanisms 26 are released, and the gantry crane 100 is disengaged from the grooves 28, so that the operation and the deployment of the gantry crane 100 are realized.

Before the gantry crane 100 is transported, the opening direction of the groove 28 of the locking seat 22 is consistent with the length direction of the first transport flat car 41, the power device 43 is started, the height of the lifting seat 19 is adjusted, and the gantry crane 100 is fixed in the groove 28. After the gantry crane 100 is transported to a working site and arrives at a designated position, the gantry crane 100 is integrally rotated by 90 degrees to be vertical to the line direction through the rotary slewing bearing 20. The supporting legs 5 of the gantry crane 100 are descended to the roadbed 46, and the lifting seat 19 is descended to enable the gantry crane 100 to be separated from the groove 28, so that the arrangement of one gantry crane 100 is completed. All the gantry cranes 100 are sequentially deployed to the designated operation positions, the first transport flat car 41 is driven away, and the gantry cranes 100 perform lifting operation.

After the gantry crane 100 finishes the hoisting operation, the first transporting flat car 41 is driven in. The first transport flat car 41 runs to a designated position, the gantry crane 100 is aligned with the groove 28, the lifting seat 19 ascends to enable the groove 28 to approach the gantry crane 100, the locking seat 22 slides forwards and backwards relative to the lifting seat 19 to enable the groove 28 to be completely aligned with the beam 1 of the gantry crane 100, the lifting seat 19 continuously ascends to enable the beam 1 to be fixed in the groove 28, and then the locking mechanism 26 is started to compress the beam 1. The legs 5 of the gantry crane 100 are retracted to the floor 57 of the first transport flat 41. And sequentially recovering the rest of the gantry cranes 100, then rotating the slewing bearing 20 to integrally rotate the gantry cranes 100 by 90 degrees until the gantry cranes are consistent with the length direction of the first transport flat car 41, and then descending the lifting seat 19 to enable the support legs 5 of the gantry cranes 100 to contact the bottom plate 57 of the first transport flat car 41. The first transport flat carriage 41 is driven away from the work site.

Example 4

In this embodiment, other auxiliary processes such as confirming a supporting point of a gantry crane, leveling the supporting point, detaching a rail fastener, cutting, welding, polishing and leveling a rail are omitted, and the turnout replacement method of the present invention will be specifically described in detail below by taking a turnout center replacement process as an example.

Fig. 17 to 38 show an embodiment of the turnout replacement operation method of the present invention, which specifically includes the following steps:

s101) a plurality of gantry cranes 100 are longitudinally fixed on a first transport flat car 41 (to adapt to vehicle limitation) through a rotary mounting base 200 (in the direction L shown in the attached drawings 17 and 18), a new turnout 44 and a lifting tool 33 are placed on a second transport flat car 42 and are transported to a designated position of a working site through traction of a rail car 40, as shown in the attached

drawings

17 and 18;

s102) the rail car 40 pulls the first transporting flat car 41 to move to the placing position of the first gantry crane 100, the rotary mounting base 200 rotates for 90 degrees until the gantry crane 100 is vertical to the line direction, and at the moment, the gantry crane 100 is transversely (in the direction W shown in the attached drawing 20) fixed on the first transporting flat car 41 through the rotary mounting base 200, as shown in the attached

drawings

19 and 20;

s103) moving the support legs 5 of the gantry crane 100 to an appointed position along the beam 1, and rotating the mounting base 200 to drive the gantry crane 100 to descend; the supporting legs 5 extend downwards to be close to the ground, the locking of the gantry crane 100 by the rotary mounting base 200 is released, the supporting legs 5 continue to extend and level, and the deployment of the gantry crane 100 is completed;

s104) the rail car 40 pulls the first transportation flat car 41 to move sequentially, and step S103) is repeatedly executed until all the gantry cranes 100 are deployed to the designated positions, as shown in fig. 21 and 22;

s105) the rail car 40 pulls the second transport flat car 42 to move to a specified position, the lifting tool 33 is hung with the gantry crane 100 and a new turnout 44, and the new turnout 44 is lifted, as shown in the accompanying figures 23 and 24;

s106) the rail car 40 pulls the first transport flat car 41 and the second transport flat car 42 to move away from the turnout replacement operation area, and the new turnout 44 is transversely moved to one side close to the supporting leg 5 and stably placed by group hoisting through a plurality of gantry cranes 100, as shown in the attached

drawings

25 and 26. The rail car 40 pulls the first transport flat car 41 and the second transport flat car 42 to drive away, as shown in fig. 27.

The following procedure is also included after step S106):

s107) cutting the steel rail 45, removing the fasteners, and removing the old turnout 56;

s108) moving the lifting tool 33 to the old turnout 56 through the gantry crane 100, hanging and lifting the old turnout 56, and stably placing the old turnout 56 on the support leg 5 close to the other side of the gantry crane 100, as shown in the attached drawing 28;

s109) moving the lifting tool 33 to the new turnout 44 through the gantry crane 100 and hanging the lifting tool, and smoothly placing the new turnout 44 at the position of the old turnout 56, as shown in fig. 29 and 30. If deviation exists, the position can be accurately adjusted by moving the mounting frame 37 of the hoisting tool 33. And then welding the new turnout 44 and the steel rail 45, installing a fastener, and completing the restoration of the line.

The following process is also included after step S109):

s110) moving the lifting tool 33 to the old turnout 56 through the gantry crane 100 and hanging and lifting;

s111) the rail car 40 pulls the second transport flat car 42 to drive in;

s112) moving and placing the old turnout 56 at the designated position of the second transport flat car 42 by the lifting tool 33, as shown in fig. 31 and 32.

The following process is also included after step S112):

s113) the rail car 40 pulls the first transportation flat car 41 to move to the position below the gantry crane 100 at the last position, and the beam 1 of the gantry crane 100 is aligned with the groove 28 of the rotary mounting seat 200, as shown in fig. 33 and fig. 34;

s114) the supporting legs 5 of the gantry crane 100 are contracted until the cross beam 1 enters the groove 28 of the rotary mounting base 200 and fixed;

s115) the supporting legs 5 of the gantry crane 100 are continuously contracted to the initial position, the supporting legs 5 move to the initial position along the beam 1, and at the moment, the gantry crane 100 is transversely fixed on the first transport flat car 41 (in the direction W shown in the attached drawing 34) through the rotary mounting base 200;

s116) repeating the steps S113) to S115), and finishing the recovery process of the rest gantry cranes 100, as shown in the accompanying

drawings

35 and 36;

s117) the rotating installation base 200 is rotated to the gantry crane 100 and fixed in the longitudinal direction (the direction L shown in fig. 37 and 38), and the rail car 40 pulls the first transporting flat car 41 and the second transporting flat car 42 to move away, as shown in fig. 37 and 38.

The hoisting tool 33 further comprises a load-bearing beam 36, a mounting frame 37, a hoisting ring 38 and a hoisting claw 39. The hoisting mechanism 4 further includes a hook 55 capable of vertically moving, and the hoisting ring 38 is disposed on the upper portion of the load beam 36, and the hook 55 is connected to the hoisting ring 38. The mounting bracket 37 is provided at a lower portion of the carrier beam 36, and the hanging claws 39 are provided at left and right sides of the mounting bracket 37 in the line direction. When the gantry crane 100 performs the lifting operation, the switch 34 is lifted by the lifting claw 39. After the turnout 34 is hoisted, the turnout 34 is hoisted to a specified longitudinal position by moving the turnout 34 back and forth on the load beam 36 in the direction of the line through the mounting frame 37. The mounting bracket 37 is movably connected with the carrier beam 36, chain wheels 50 are arranged at two ends of the carrier beam 36 along the line direction, and the two chain wheels 50 are connected through a chain 51. The chain 51 is connected with the mounting rack 37, one of the chain wheels 50 is driven to rotate by the longitudinal moving mechanism 48, and the chain wheel 50 rotates to drive the chain 51 to move along the line direction, so that the longitudinal movement of the mounting rack 37 is realized.

The gantry crane 100 further comprises a sliding frame 2 and a hoisting 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 move transversely along the cross 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 move transversely along the cross beam 1. And supporting legs 5 which can stretch out and draw back along 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.

A traverse support 57 with internal threads is provided on the slide frame 2, and a mounting seat 49 is provided on the cross beam 1. The sliding driving mechanism 3 adopts a power-driven screw mechanism, a power driving end of the sliding driving mechanism 3 is fixed on the mounting seat 49, a screw end is connected to the transverse moving support 57, and the sliding frame 2 is driven to move transversely by the rotation of the power-driven screw. The lower parts of the supporting legs 5 are provided with adjustable supporting legs 8, and in the process of deploying the gantry crane 100, the supporting legs 5 and the gantry crane 100 can be leveled through the adjustable supporting legs 8.

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 mutual contact. The locking mechanism 48 passes through the sliding frame 2 and then compresses the two wedge-shaped sliding blocks to lock the position of the sliding frame 2. When the transverse span of the two support legs 5 is adjusted in place, the position of the sliding frame 2 is locked by the wedge-shaped locking mechanism 18.

The leg 5 further comprises a threaded barrel 6, a screw 9, a seat 10 and a leg sleeve 11. A threaded cylinder 6 is connected below the sliding frame 2, a support leg sleeve 11 is sleeved below the threaded cylinder 6, and a support 10 is arranged below the support 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 9 is connected with the lifting driving mechanism 7. A bearing 13 is arranged between the screw 9 and the carrier 10. The lifting driving mechanism 7 drives the screw rod 9 to rotate so that the thread cylinder 6 moves up and down, and the telescopic function of the supporting leg 5 is realized.

In the description of the present application, it is 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 will be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

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

It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, so that the present application has no technical significance.

By implementing the technical scheme of the turnout replacement operation method described in the specific embodiment of the invention, the following technical effects can be achieved:

(1) according to the turnout replacement operation method described in the specific embodiment of the invention, the support legs of the gantry crane are arranged on two sides of a railway line in a spanning manner, adjacent line operation is not required, the safety risk of exceeding the limit of operation is avoided, meanwhile, the device is simple in structure, high in reliability, convenient to maintain and overhaul and high in operation efficiency, and large-size turnout parts can be lifted;

(2) the turnout replacement operation method described in the specific embodiment of the invention is suitable for replacing the whole set of turnouts and replacing single switch rails, turnout centers and the like, and can realize the transportation, placement, position adjustment and replacement of various line components with different lengths through the combination of a plurality of gantry cranes, in particular can realize the lifting of large-size turnout components;

(3) according to the turnout replacement operation method described in the specific embodiment of the invention, the gantry crane has the functions of transversely moving, lifting and leveling the supporting legs, the transverse span distance and the ground distance height of the supporting legs are adjustable, the ground working condition requirements of different lines can be met, the height of the gantry crane is adjustable, and the risk of touching a contact net is avoided in the lifting process;

(4) according to the turnout replacement operation method described in the specific embodiment of the invention, the gantry crane is low in manufacturing cost, few in operating personnel, quick to replace and high in efficiency, the gantry crane is longitudinally arranged on a flat car during transportation and does not exceed the limit of the car, and the lifting tool hanging point can longitudinally move to enable the turnout to be more accurately positioned.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A switch replacing operation method is characterized by comprising the following steps:

s101) a plurality of gantry cranes (100) are longitudinally fixed on a first transport flat car (41) through a rotary mounting seat (200), new turnouts (44) and a hoisting tool (33) are placed on a second transport flat car (42), and are transported to an appointed position of an operation site through traction of a rail car (40);

s102) the rail car (40) pulls the first transport flat car (41) to move to the placing position of the first gantry crane (100), and the rotary mounting seat (200) rotates for 90 degrees until the gantry crane (100) is vertical to the line direction;

s103) the supporting legs (5) of the gantry crane (100) move to an appointed position along the cross beam (1), and the rotary mounting base (200) drives the gantry crane (100) to descend; the supporting legs (5) extend downwards to be close to the ground, the locking of the gantry crane (100) by the rotary mounting base (200) is released, the supporting legs (5) continue to extend and level, and the deployment of the gantry crane (100) is completed;

s104) the rail car (40) pulls the first transport flat car (41) to move sequentially, and the step S103 is repeatedly executed until all the gantry cranes (100) are deployed to the designated positions;

s105) the rail car (40) pulls the second transport flat car (42) to move to a designated position, the lifting tool (33) is connected with the gantry crane (100) and the new turnout (44) in a hanging mode, and the new turnout (44) is lifted;

s106) the rail car (40) pulls the first transport flat car (41) and the second transport flat car (42) to drive away from the replacement operation area, and group hoisting is carried out through a plurality of gantry cranes (100) to transversely move the new turnout (44) to one side close to the supporting leg (5) for placement.

2. The switch replacement operation method according to claim 1, further comprising the following process after said step S106):

s107) cutting the steel rail (45), removing the fastener, and removing the old turnout (56);

s108) moving the lifting tool (33) to an old turnout (56) through the gantry crane (100), hanging and lifting the turnout, and placing the old turnout (56) on a supporting leg (5) close to the other side of the gantry crane (100);

s109), moving the lifting tool (33) to a new turnout (44) through the gantry crane (100), hanging and lifting the new turnout, and placing the new turnout (44) at the position of the old turnout (56); and welding the new turnout (44) and a steel rail (45), installing a fastener, and completing the restoration of the line.

3. The switch replacement operation method according to claim 2, further comprising the following process after step S109):

s110) moving the lifting tool (33) to an old turnout (56) through the gantry crane (100) and hanging and lifting;

s111) the rail car (40) pulls a second transport flat car (42) to drive in;

s112) moving and placing the old turnout (56) at the designated position of the second transport flat car (42) through the lifting tool (33).

4. The switch replacement operation method according to claim 3, further comprising the following process after said step S112):

s113) the rail car (40) pulls the first transport flat car (41) to move to the position below the gantry crane (100) at the last position, and the beam (1) of the gantry crane (100) is aligned to the position of the groove (28) of the rotary mounting seat (200);

s114) the supporting legs (5) of the gantry crane (100) are contracted to the cross beam (1) and enter the groove (28) of the rotary mounting base (200) and are fixed;

s115) continuing to retract the supporting legs (5) of the gantry crane (100) to the initial position, and moving the supporting legs (5) to the initial position along the cross beam (1);

s116) repeating the steps S113-S115), and finishing the recovery process of the rest gantry cranes (100);

s117) the rotating installation seat (200) rotates to the gantry crane (100) to be longitudinally fixed, and the rail car (40) pulls the first transportation flat car (41) and the second transportation flat car (42) to drive away.

5. The switch replacement operation method according to any one of claims 1 to 4, wherein: the lifting tool (33) comprises a bearing beam (36), a mounting frame (37), a lifting ring (38) and a lifting claw (39); the lifting mechanism (4) comprises a lifting hook (55) capable of lifting and moving along a vertical direction, the lifting ring (38) is arranged at the upper part of the bearing beam (36), and the lifting hook (55) is connected with the lifting ring (38); the mounting frame (37) is arranged at the lower part of the bearing beam (36), and the lifting claws (39) are arranged at the left side and the right side of the mounting frame (37) along the line direction; when the gantry crane (100) carries out lifting operation, the turnout (34) is lifted through the lifting claw (39); after the turnout (34) is hoisted, the turnout (34) is hoisted to a specified longitudinal position by moving the turnout back and forth on the bearing beam (36) along the direction of a line through the mounting frame (37).

6. The switch replacement operation method according to claim 5, wherein: the mounting frame (37) is movably connected with the bearing beam (36), chain wheels (50) are arranged at two ends of the bearing beam (36) along the line direction, and the two chain wheels (50) are connected through a chain (51); the chain (51) is connected with the mounting frame (37), one chain wheel (50) is driven to rotate through the longitudinal movement mechanism (48), and the chain wheel (50) rotates to drive the chain (51) to move along the line direction, so that the longitudinal movement of the mounting frame (37) is realized.

7. A switch replacement operation method according to claim 1, 2, 3, 4 or 6, wherein: the gantry crane (100) further comprises a sliding frame (2) and a hoisting 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 hoisting mechanism (4) is arranged on the cross beam (1) between the two sliding frames (2), and the hoisting mechanism (4) can move transversely along the cross beam (1); supporting legs (5) which can stretch out and draw back along 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).

8. The switch replacement operation method according to claim 7, wherein: a transverse moving 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-driven lead screw mechanism, a power driving end of the sliding driving mechanism (3) is fixed on the mounting seat (49), a lead screw end is connected to the transverse moving support (57), and the sliding frame (2) is driven to move transversely through the rotation of the power-driven lead screw.

9. The switch replacement operation method according to claim 8, 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 mutual contact; after penetrating 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); when the transverse span of the two support legs (5) is adjusted to the right position, the position of the sliding frame (2) is locked through the wedge-shaped locking mechanism (18).

10. The switch replacement operation method according to claim 8 or 9, wherein: the supporting leg (5) comprises a threaded cylinder (6), a screw rod (9), a support (10) and a supporting leg sleeve (11); a threaded cylinder (6) is connected below the sliding frame (2), a support leg sleeve (11) is sleeved below the threaded cylinder (6), and a support seat (10) is arranged below the support leg sleeve (11); a lifting driving mechanism (7) is arranged in the support (10), a screw rod (9) is arranged in the support 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.

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

12. A switch replacement operation method according to claim 1, 2, 3, 4, 6, 8, 9 or 11, wherein: the lower part of the supporting leg (5) is provided with an adjustable supporting leg (8), and in the deployment process of the gantry crane (100), the supporting leg (5) and the gantry crane (100) can be leveled through the adjustable supporting leg (8).