Single-rail crane double-rail parallel heavy-load transportation process

Abstract

The invention relates to a monorail crane double-track parallel heavy-load transportation process which is characterized in that two tracks are arranged at the top in a roadway, the two tracks are mounted at the same horizontal height of the top of the roadway and keep a fixed parallel distance, each track is provided with a monorail crane locomotive, and the two monorail crane locomotives synchronously move in parallel; the monorail crane comprises hoisting beams and a plurality of driving and braking parts, the driving and braking parts walk on rails, and the two hoisting beams are located on the two sides of goods respectively; two lifting hook chains arranged front and back are arranged on the lifting beams, the four lifting hook chains of the two lifting beams jointly act to lift goods and walk and transport the goods along the rails, the rails of existing standard specifications and locomotive models are adopted, the two rails jointly bear the weight of the goods, and transportation of the extra-heavy goods is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of monorail cranes, and in particular to a monorail crane double-track parallel heavy-load transportation process. Background Art

[0002] The most important function of monorail crane transportation is the overall transportation of hydraulic supports, including rails, locomotives, and lifting beams. The rails are fixed to the tunnel roof through chain locks to form a rail line, and the locomotive runs on the rails and completes the transportation of hydraulic supports through the lifting beam.

[0003] However, the current carrying capacity of monorail cranes is far behind the heavy-duty development of hydraulic supports. The main reason is that the domestic monorail crane tracks have always adopted German standard I140E and I140V special rails. I140V is a heavy-duty track, corresponding to the standard DIN 20593-3 2004, which matches the tunnel support technology and hydraulic development level at the time. Its track carrying capacity and lifting beam structure determine that the overall transportation weight limit of the hydraulic support is about 50 tons. In recent years, domestic coal mining technology has developed rapidly, and extra-large hydraulic supports weighing more than 100 tons have been common in domestic coal mines. Therefore, how to realize the transportation of extra-large hydraulic supports has become a problem that needs to be solved in the field of monorail cranes. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a single-rail hanging and double-rail parallel heavy-load transportation process, which adopts two rails to carry the load together and solves the problem of overall transportation of extra-large hydraulic supports.

[0005] The present invention is implemented through the following technical scheme, and provides a single-rail crane and double-rail parallel heavy-load transportation process, comprising the following steps: a. Two tracks are set at the top of the tunnel. The two tracks are installed at the same horizontal height of the tunnel top and maintain a fixed parallel distance. A monorail crane is set on each track, and the two monorail cranes move in parallel and synchronously; b. The monorail crane locomotive comprises a lifting beam and a plurality of driving and braking parts, wherein the driving and braking parts travel on the track, and two lifting beams are respectively located on both sides of the cargo; c. The lifting beam is provided with two hook chains arranged front and back, and the four hook chains of the two lifting beams work together to lift the goods and transport them along the track.

[0006] As an optimization, the two monorail locomotives communicate by wire or wirelessly, one of the monorail locomotives sends command signals to the main control system, and the other monorail locomotive is the slave system. In the transport mode, the two monorail locomotives start, stop and move synchronously.

[0007] As an optimization, at least one monorail locomotive further includes a cab, a main engine room and a battery auxiliary machine, wherein the main engine room provides power for the driving and braking parts of the two monorail locomotives.

[0008] As an optimization, the lifting beam includes a middle frame beam and two combined beams arranged front and back, the combined beam is equipped with a plurality of load trolleys running on the track, the two ends of the middle frame beam are respectively connected to the two combined beams through lifting chains and the connection points of the lifting chains on the combined beams are located directly below the track, the middle frame beam is connected to two hook chains arranged front and back, and the lower ends of the hook chains are equipped with hooks.

[0009] As an optimization, the upper end of the hook chain is connected to the middle frame beam through a balancing oil cylinder, and the inner cavities of the four balancing oil cylinders of the two lifting beams are connected through oil pipes.

[0010] As an optimization, both ends of the middle frame beam are respectively equipped with push cylinders that can be extended and retracted toward the middle of the middle frame beam. A moving sprocket is installed on the telescopic shaft of the push cylinder, and a fixed sprocket is installed at the end of the middle frame beam. The lifting chain is connected to the middle frame beam after passing through the fixed sprocket and the moving sprocket downward in turn.

[0011] As an optimization, the composite beam includes a load-bearing main beam extending front and rear, the lifting chain is connected to the middle part of the load-bearing main beam, the ends of the load-bearing main beam are hinged to the transition beam through hinge shafts extending left and right, the middle part of the transition beam is hinged to the middle part of the trolley beam through a vertical hinge shaft, and load trolleys are installed at both front and rear ends of the trolley beam.

[0012] As an optimization, the track includes an input rail, and a first output rail and a second output rail connected by a switch, wherein the second output rail of one track intersects with the first output rail of the other track and a reversing mechanism is arranged at the intersection, the reversing mechanism includes a fixed frame and a reversing rail located below the fixed frame, the reversing rail is hinged to the fixed frame through a vertical rotating shaft, the first output rail at the intersection is provided with a first docking interface that is adapted to the reversing rail, and the second output rail at the intersection is provided with a second docking interface that is adapted to the reversing rail, and the reversing mechanism also includes a reversing drive mechanism that drives the reversing rail to swing between the first docking interface and the second docking interface.

[0013] As an optimization, a stop block is fixedly connected to the lower end face of the reversing rail, and the lower end face of the second output rail close to the second docking interface and the lower end face of the first output rail close to the first docking interface are both fixedly connected to a limiting baffle, and one end of the limiting baffle extends to below the reversing rail.

[0014] As an optimization, the reversing drive mechanism includes a reversing cylinder, one end of which is hinged to a fixing frame, and the other end of which is hinged to a reversing rail.

[0015] The beneficial effects of the present invention are as follows: a single-rail hanging double-rail parallel heavy-load transportation process of the present invention adopts existing domestic track standards and locomotive models, runs a set of locomotives and lifting beams on two tracks respectively, and the two sets of lifting beams carry and operate synchronously together, thereby realizing the overall transportation of ultra-heavy goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 A top view of the present invention; Figure 4 For the present invention Figure 2 Sectional view of the middle AA plane; Figure 5 It is a structural schematic diagram of the lifting beam of the present invention; Figure 6 It is a front view of the lifting beam of the present invention; Figure 7 is a side view of a lifting beam of the present invention; Figure 8 It is a front view of a composite beam of a lifting beam of the present invention; Fig. 9 A top view of a composite beam of a lifting beam of the present invention; Fig.10 It is a schematic diagram of the middle beam end of the lifting beam of the present invention; Fig.11 It is a schematic diagram of the connection of the balancing cylinder of the lifting beam of the present invention; Fig.12 A top view of the track of the present invention; Fig.13 A top view of the reversing mechanism of the track of the present invention; Fig.14 A bottom view of the reversing mechanism of the track of the present invention; Fig.15 It is a schematic diagram of the structure of the reversing mechanism of the track of the present invention; Fig.16 It is a schematic structural diagram of the reversing mechanism of the track of the present invention from another angle; Fig.17 For the present invention Fig.15 Enlarged view of middle C; Fig.18 For the present invention Fig.14 Enlarged view of middle part B; Fig.19 For the present invention Fig.18 Middle D-direction view; As shown in the figure: 1. Track, 11. Reversing mechanism, 12. Input rail, 13. Turnout, 14. First output rail, 15. Second output rail, 111. Fixed frame, 112. Reversing rail, 113. Rotating shaft, 114. Reversing cylinder, 115. Connecting frame, 116. Limit baffle, 117. Block, 2. Lifting beam, 21. Combined beam, 211. Load-bearing main beam, 212. Transition beam, 213. Trolley beam, 214. Lever beam, 215. Load trolley, 22. Lifting chain, 23. Middle frame beam, 231. Fixed sprocket, 232. Push cylinder, 233. Moving sprocket, 24. Balance cylinder, 25. Hook chain, 26. Hook, 3. Driving brake part, 4. Cab, 5. Main engine room, 6. Battery auxiliary machine, 7. Connecting rod, 8. Hydraulic support. DETAILED DESCRIPTION

[0017] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0018] Embodiment 1: like Figures 1 to 19 As shown, a single-rail hanging and double-rail parallel heavy-load transportation process of the present invention comprises the following steps: a. Two tracks 1 are set at the top of the tunnel. The two tracks are installed at the same horizontal height of the tunnel top and maintain a fixed parallel distance. A monorail crane is set on each track, and the two monorail cranes move in parallel and synchronously.

[0019] b. The monorail crane locomotive includes a lifting beam 2 and a plurality of driving and braking parts 3. The driving and braking parts 3 run on the track, and two lifting beams 2 are respectively located on both sides of the cargo.

[0020] c. The lifting beam 2 is provided with two hook chains 25 arranged front and back. The four hook chains 25 of the two lifting beams 2 work together to lift the goods and transport them along the track.

[0021] In the lifting mode, two sets of lifting beams use one lifting controller to achieve synchronous lifting of heavy goods on both sides and below.

[0022] The monorail crane locomotive also includes a cab 4, a main engine room 5 and a battery auxiliary machine 6. The main engine room 5 provides power for the driving and braking parts 3 of the two monorail crane locomotives. There are multiple driving and braking parts 3 on the track. The lifting beam 2, the main engine room 5 and the battery auxiliary machine 6 are respectively arranged between two adjacent driving and braking parts 3. The components are connected in series through the connecting rod 7 to form a complete vehicle. There are two cabs 4, which are located at the front and rear ends of the locomotive respectively. The locomotive sends a control command from the front cab in the forward direction, and the rear cab is in a locked state at this time.

[0023] The driving brake part 3 provides power output, and the number is multiple. When the monorail crane transports the hydraulic support 8, each monorail crane is equipped with a set of lifting beams 2, which are arranged in the middle of the monorail crane and run on the track 1. Each lifting beam 2 has two hook chains 25, a total of four hook chains 25, corresponding to the four lifting holes of the hydraulic support 8.

[0024] The two monorail locomotives communicate by wire or wirelessly, one of the monorail locomotives sends command signals as the master control system, and the other monorail locomotive is the slave system. In the transport mode, the two monorail locomotives start, stop, and move synchronously. A driver can issue commands in one of the cabs to operate synchronously or remotely control the operation of the two locomotives, which will not be described in detail here.

[0025] The transport process of the present invention is mainly based on the following arguments: (1) I140E and I140V monorail crane rails are imported German standards, weighing 36.5 kg per meter. They have been widely used abroad in the last century. Compared with the development of ground heavy-duty rails, monorail crane rails are in a relatively backward state. New monorail crane heavy-duty rails have not been developed at home and abroad, which limits the heavy-duty transportation capacity of the monorail crane system; (2) Domestic mine large-section transportation tunnels meet the passage of large goods and allow the arrangement of two parallel tracks; (3) Monorail crane locomotives and lifting beams are mature in technology and can provide sufficient lifting power and walking power; (4) The mature development of sensing and electronic control technology can provide various synchronous and coordinated control methods to realize double-track parallel heavy-duty transportation. The present invention provides a monorail crane double-track parallel heavy-duty transportation process, which breaks the problem of limited monorail crane transportation capacity caused by insufficient bearing capacity of existing tracks.

[0026] like Fig.12 As shown, the two tracks 1 maintain a fixed parallel distance, and the two monorail crane locomotives need to switch the double tracks during transportation. In order to achieve the switching, the track 1 includes an input rail 12, and a first output rail 14 and a second output rail 15 connected by a switch 13. The first output rail 14 is coaxial with the input rail 12, and the second output rail 15 is at a certain angle to the first output rail 14. The two first output rails 14 are parallel, and the two second output rails 15 are parallel.

[0027] The switch 13 is switched between the first output rail 14 and the second output rail 15. The switch 13 is a prior art, and can adopt a monorail crane remote control switch of CN220906977U, or a monorail crane switch device capable of bidirectionally blocking vehicles of CN216915882U.

[0028] like Fig.12 As shown, the second output rail 5 of one track intersects with the first output rail 4 of the other track, and a reversing mechanism 1 is arranged at the intersection.

[0029] The reversing mechanism 11 includes a fixed frame 111 and a reversing rail 112 located below the fixed frame 111. The reversing rail 112 is hinged to the fixed frame 111 through a vertical rotating shaft 113. A first docking interface matched with the reversing rail 112 is provided on the first output rail 14 at the intersection, and a second docking interface matched with the reversing rail 112 is provided on the second output rail 15 at the intersection. The reversing mechanism 11 also includes a reversing drive mechanism for driving the reversing rail 112 to swing between the first docking interface and the second docking interface.

[0030] The fixing frame 111 includes a rectangular frame and two diagonal beams connected to two diagonal lines inside the rectangular frame. The fixing frame 111 is horizontally arranged, and the rotating shaft 113 is rotatably connected to the central position of the intersection of the two diagonal beams. The middle part of the reversing rail 112 is fixedly connected to the rotating shaft 113. The first output rail 14 and the second output rail 15 are both connected to the fixing frame 111 to improve the bearing capacity of the first output rail 14 and the second output rail 15.

[0031] The reversing drive mechanism includes a reversing cylinder 114, which is arranged above the fixed frame 111, one end of the reversing cylinder 114 is hinged to the fixed frame 111, and the other end is hinged to the reversing rail 112. Specifically, in this embodiment, a connecting frame 115 is fixedly connected to the reversing rail 112, and the other end of the reversing cylinder 114 is hinged to the connecting frame 115. The connecting frame 115 includes a vertical plate fixedly connected to the upper end of the reversing rail 112 and a horizontal plate fixedly connected to the upper end of the vertical plate, and the horizontal plate is located above the fixed frame 111.

[0032] like Figure 13-16 As shown, the horizontal plate of the connecting frame 115 is located above the fixed frame, and the vertical plate of the connecting frame 115 swings in a triangle formed by two diagonal beams and one side of the rectangular frame. In this embodiment, when the reversing rail 112 is connected to the second output rail 15, one end of the horizontal plate is located directly above the diagonal beam, which plays a role in falling protection and facilitates the arrangement of the reversing cylinder 114.

[0033] Both ends of the reversing rail 112 are fixedly connected with a connecting frame 115, which can adapt to the installation conditions on site, facilitate the connection of the reversing cylinder with any connecting frame, and facilitate on-site arrangement.

[0034] A stopper 117 is fixedly connected to the lower end surface of the reversing rail 112 . The lower end surfaces of both ends of the reversing rail 112 are provided with processing planes. The stopper 117 is fixedly connected to the processing plane so that the lower end of the stopper 117 in this embodiment is higher than the lower end of the reversing rail 112 .

[0035] The lower end surface of the end of the second output rail 15 close to the second docking interface and the lower end surface of the end of the first output rail 14 close to the first docking interface are both fixedly connected to the limit baffle 116, and the lower end surface of the end of the second output rail 15 close to the second docking interface and the lower end surface of the end of the first output rail 14 close to the first docking interface are both provided with a processing plane, and the limit baffle 116 is fixedly connected to the processing plane. One end of the limit baffle 116 extends to the bottom of the reversing rail 112.

[0036] The method of using two tracks for reversing includes the following steps: a. Two monorail cranes travel on two tracks respectively, and synchronize the track switching of the two tracks is realized through two switches 13; b. When two monorail cranes travel on the two first output rails 14, the reversing rail 112 is swung so that the reversing rail 112 is docked on the first interface to achieve the integrity of the first output rail 14 at the intersection; c. When two monorail cranes travel on the two second output rails 15, the reversing rail 112 is swung to dock the reversing rail 112 on the second docking interface, thereby achieving the integrity of the second output rail 15 at the intersection.

[0037] like Figure 5 As shown, two lifting beams 2 are arranged side by side, and the hydraulic support 8 is located between the two lifting beams 2. The lifting beams include a middle frame beam 23 and two combined beams 21 arranged front and back. The two combined beams 21 are connected by a connecting rod 7 to achieve synchronous walking. The two ends of the middle frame beam 23 are respectively connected to the two combined beams 21 through a lifting chain 22, and the connection point of the lifting chain 22 on the combined beam 21 is located directly below the track 1.

[0038] The combined beam 21 is located below the track 1, and the combined beam 21 is equipped with a plurality of load trolleys 215 that travel on the track 1. The load trolley 215 is a common structure of an existing monorail crane, and is equipped with a plurality of running wheels that travel on the track 1. The load trolley 215 is an existing technology and will not be described in detail.

[0039] like Figure 4 , 5 As shown, the composite beam 1 includes a load-bearing main beam 11 extending forward and backward, and the load-bearing main beam 11 is located directly below the track 7. The lifting chain 2 is connected to the middle of the load-bearing main beam 11, so that the connection point between the lifting chain 2 and the load-bearing main beam 11 is located directly below the track 7.

[0040] like Figure 8As shown, the end of the supporting main beam 211 is hinged to the transition beam 212 through a hinge axis extending left and right. The transition beam 212 extends left and right. The end of the supporting main beam 211 is a fork-shaped structure. The two transverse rotating axes of the transition beam 212 are respectively axially connected to the two forks of the fork-shaped structure, thereby realizing the hinge connection between the transition beam 212 and the supporting main beam 211.

[0041] The middle part of the transition beam 212 is hinged to the middle part of the trolley beam 213 through a vertical hinge axis. The trolley beam 213 is in the shape of a long strip extending forward and backward. The middle position in the length direction passes through the transition beam 212, and the middle position of the trolley beam 213 is connected to the transition beam 212 through a vertical rotating shaft, thereby realizing the hinge connection between the trolley beam 213 and the transition beam. The trolley beam 213 can swing left and right relative to the transition beam 212, and at the same time, the trolley beam 213 can swing up and down relative to the load-bearing main beam 211 through the transition beam 212.

[0042] The front and rear ends of the trolley beam 213 are both equipped with a load trolley 215. Figure 8 As shown, the front and rear ends of the trolley beam 213 described in this embodiment are equipped with lever beams 214, the lever beam 214 extends forward and backward, the middle position of the lever beam 214 is hinged to the hanging shaft through a hinge shaft extending left and right, the lower end of the hanging shaft is connected to the end of the trolley beam 213, and the hanging shaft can be rotatably connected to the trolley beam 213 along the vertical rotating shaft, thereby realizing the connection between the lever beam 214 and the trolley beam 213, and the front and rear ends of the lever beam 214 are equipped with load trolleys 215, so that one combined beam 21 is connected to the track through 8 load trolleys 215, thereby improving the carrying capacity.

[0043] The two ends of the middle frame beam 23 are connected to the two combined beams 21 through lifting chains 22, such as Figure 6 , 10 As shown, both ends of the middle frame beam 23 are respectively equipped with a push cylinder 232 which is telescopic toward the middle of the middle frame beam 23. The push cylinder 232 is horizontally arranged and extends forward and backward. The cylinder body is fixedly connected to the end of the middle frame beam 23. A moving sprocket 233 is installed on the telescopic shaft of the push cylinder 232. A fixed sprocket 231 is installed at the end of the middle frame beam 23. The fixed sprocket 231 is located directly below the lifting chain 22.

[0044] like Fig.10 As shown, the lifting chain 22 passes downwardly around the fixed sprocket 231 and the movable sprocket 233 in sequence and then is connected to the middle frame beam 23, so that the height of the end of the middle frame beam 23 can be adjusted by extending and retracting the push cylinder 232.

[0045] Two hook chains 25 arranged front and back are connected to the middle frame beam 23 , and hooks 26 are mounted at the lower ends of the hook chains 25 for lifting equipment.

[0046] The upper end of the hook chain 25 is connected to the middle frame beam 23 through the balancing oil cylinder 24, and the inner cavities of the four balancing oil cylinders of the two lifting beams are connected through oil pipes. The balancing oil cylinder is a single-acting oil cylinder. When lifting, gravity compresses the inner cavity of the balancing oil cylinder. In this scheme, the four inner cavities are connected through oil pipes because during transportation, due to the unevenness of the lanes and tracks and the shaking of the hydraulic support, it is easy to cause uneven force on the four chains. Some chains are less stressed or even the hooks are detached, and some chains are overstressed, causing the support to tilt or the chain to break. The four inner cavities are connected through oil pipes, which can realize automatic balance and adjustment of the tension of multiple chains. The chain with high tension increases the pressure in the inner cavity of the oil cylinder, and the oil enters the oil cylinder with low pressure through the connecting pipeline, the piston rod is extended, and the chain tension is reduced; on the contrary, the oil capacity of the oil cylinder with low pressure is forced to increase, the piston rod retracts, and the chain tension increases until it is basically consistent with the tension of other chains.

[0047] like Fig.11 As shown, a one-way throttle valve is installed on the pipeline of the balancing oil cylinder 24, which is free from resistance when the oil flows out and has a throttling effect when the oil flows in.

[0048] How to use the lifting beam 2: The load trolley 215 on the two combined beams 21 is responsible for walking on the track 1, thereby driving the entire lifting beam to walk. The middle frame beam 23 is hung on the two combined beams 21 through two lifting chains 22 and the lifting point is located directly below the track 1, so that the gravity of the lifting acts directly on the track 1. The middle frame beam 23 can be driven to rise and fall by extending and retracting the push cylinder 232, and the hook 26 at the lower end of the hook chain 25 realizes the lifting operation of the equipment. Embodiment 2: The difference between this embodiment and embodiment 1 is that: In this embodiment, one of the monorail crane locomotives is incompletely configured, and only includes a number of lifting beams 2 and a plurality of driving brake parts 3; the main engine room 5 and the battery auxiliary machine 6 of the other monorail crane locomotive provide a power source.

[0049] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A monorail crane and double-rail parallel heavy-load transportation process, characterized in that: The steps include: a. Two tracks are set at the top of the tunnel. The two tracks are installed at the same horizontal height of the tunnel top and maintain a fixed parallel distance. A monorail crane is set on each track, and the two monorail cranes move in parallel and synchronously; b. The monorail crane comprises a lifting beam (2) and a plurality of driving and braking parts (3), wherein the driving and braking parts (3) travel on the track, and two lifting beams (2) are respectively located on two sides of the cargo; c. The lifting beam (2) is provided with two hook chains (25) arranged front and back, and the four hook chains (25) of the two lifting beams (2) work together to lift the goods and transport them along the track.

2. The process for heavy-load transportation using a single-rail crane and dual-rails in parallel according to claim 1 is characterized by: The two monorail locomotives communicate by wire or wirelessly, one of the monorail locomotives sends a command signal to the master control system, and the other monorail locomotive is the slave system. In the transport mode, the two monorail locomotives start, stop and travel synchronously.

3. The process for heavy-load transportation by using a single-rail crane and dual-rails in parallel according to claim 1 is characterized in that: At least one monorail locomotive also includes a cab (4), a main engine room (5) and a battery auxiliary machine (6), wherein the main engine room (5) provides power for the driving and braking parts (3) of the two monorail locomotives.

4. The method of heavy-load transportation by using a single-rail crane and dual-rails in parallel according to claim 1 is characterized in that: The lifting beam (2) comprises a middle frame beam (23) and two combined beams (21) arranged front and back, the combined beam (21) is provided with a plurality of load trolleys (215) running on a track (27), the two ends of the middle frame beam (23) are respectively connected to the two combined beams (21) through lifting chains (22), and the connection points of the lifting chains (22) on the combined beams (21) are located directly below the track, the middle frame beam (23) is connected with two hook chains (25) arranged front and back, and the lower ends of the hook chains (25) are provided with hooks (26).

5. The method of heavy-load transportation by using a single-rail crane and double-rails in parallel according to claim 4 is characterized in that: The upper end of the hook chain (25) is connected to the middle frame beam (23) via a balancing oil cylinder (24), and the inner cavities of the four balancing oil cylinders (24) of the two lifting beams (2) are connected via oil pipes.

6. The process for heavy-load transportation by using a single-rail crane and dual-rails in parallel according to claim 4 is characterized by: Both ends of the middle frame beam (23) are respectively provided with a push cylinder (232) which is telescopically moved toward the middle of the middle frame beam (23); a movable sprocket (233) is provided on the telescopic shaft of the push cylinder (232); a fixed sprocket (231) is provided at the end of the middle frame beam (23); and the lifting chain (22) is connected to the middle frame beam (23) after passing through the fixed sprocket (231) and the movable sprocket (233) in sequence downward.

7. The process for heavy-load transportation by using a single-rail crane and dual-rails in parallel according to claim 4 is characterized by: The combined beam (21) comprises a load-bearing main beam (211) extending forward and backward, the lifting chain (22) being connected to the middle of the load-bearing main beam (211), the ends of the load-bearing main beam (211) being hinged to the transition beam (212) via hinge shafts extending left and right, the middle of the transition beam (212) being hinged to the middle of the trolley beam (213) via a vertical hinge shaft, and the front and rear ends of the trolley beam (213) are both equipped with load trolleys (215).

8. The monorail crane and dual-rail parallel heavy-load transportation process according to claim 1 is characterized by: The track comprises an input rail (12), and a first output rail (14) and a second output rail (15) connected via a switch (13), wherein the second output rail (15) of one track intersects with the first output rail (14) of the other track, and a reversing mechanism (11) is arranged at the intersection, wherein the reversing mechanism (11) comprises a fixed frame (111) and a reversing rail (112) located below the fixed frame (111), wherein the reversing rail (112) is hingedly connected to the fixed frame (111) via a vertical rotating shaft (113), wherein a first mating interface matching the reversing rail (112) is arranged on the first output rail (14) at the intersection, and a second mating interface matching the reversing rail (112) is arranged on the second output rail (15) at the intersection, and wherein the reversing mechanism (11) further comprises a reversing drive mechanism for driving the reversing rail (112) to swing between the first mating interface and the second mating interface.

9. The method of heavy-load transportation by using a single-rail crane and double-rails in parallel according to claim 8 is characterized in that: A stopper (117) is fixedly connected to the lower end surface of the reversing rail (112), and a limit baffle (116) is fixedly connected to the lower end surface of the end of the second output rail (15) close to the second docking interface and the lower end surface of the end of the first output rail (14) close to the first docking interface. One end of the limit baffle (116) extends below the reversing rail (112).

10. The monorail crane and double-rail parallel heavy-load transportation process according to claim 8, characterized in that: The reversing drive mechanism comprises a reversing cylinder (114), one end of the reversing cylinder (114) being hinged to a fixing frame (111), and the other end of the reversing cylinder (114) being hinged to a reversing rail (112).

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