CN114435417B

CN114435417B - Coil steel bracket base seat frame and railway transportation system

Info

Publication number: CN114435417B
Application number: CN202210376669.5A
Authority: CN
Inventors: 王亚光
Original assignee: Zhonghuai Container Equipment Technology Tianjin Co ltd
Current assignee: Zhonghuai Container Equipment Technology Tianjin Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-07-15
Anticipated expiration: 2042-04-12
Also published as: CN114435417A

Abstract

The invention discloses a coil steel bracket base seat frame and a railway transportation system. The base seat frame of the coil steel bracket comprises a frame, wherein first corner pieces are arranged at four corners of the frame, and a plurality of first locking assemblies are arranged on the frame; the first locking assembly comprises a mounting sleeve fixed on the frame, a sliding block located in the mounting sleeve, a rotating rod penetrating through the sliding block and a shifting lever mounted on the sliding block, and a locking head is arranged at the end of the rotating rod. The railway transport system comprises a freight flat car, a coil steel carrier base frame as described above and a coil steel carrier. By adopting the technical scheme, the base seat frame of the coil steel bracket and the railway transportation system are simple in structure and convenient to operate, so that railway transportation of coil steel can be realized.

Description

Coil steel bracket base seat frame and railway transportation system

Technical Field

The invention relates to the technical field of railway transportation systems, in particular to a coil steel bracket base seat frame for railway transportation and a railway transportation system.

Background

Railways are the national important traffic infrastructure and major civil engineering. In order to promote the adjustment of the transportation structure and better exert the backbone operation of the railway in bulk material transportation and long-distance transportation, the adjustment of the railway transportation structure is particularly important. Taking the transportation of the steel coil as an example, after the production of the steel coil in a factory is completed, the steel coil needs to be transported to a port or other distribution places through a freight train, and thus the steel coil bracket needs to be used for fixing the steel coil. In view of this, the present invention provides a coil bracket base seat frame capable of fixing a coil bracket to facilitate transportation of a coil in a railway transportation process.

Disclosure of Invention

Therefore, it is an object of the present invention to provide a coil steel bracket base frame for railway transportation and a railway transportation system.

In order to achieve the purpose, the base seat frame of the coil steel bracket comprises a frame, wherein first corner pieces are arranged at four corners of the frame, and a plurality of first locking assemblies are arranged on the frame; the first locking assembly comprises a mounting sleeve fixed on the frame, a sliding block positioned in the mounting sleeve, a rotating rod penetrating through the sliding block and a shifting rod mounted on the sliding block, a locking head is arranged at the end part of the rotating rod, a through groove is formed in the mounting sleeve, the shifting rod penetrates through the through groove and can move along the through groove, the through groove comprises a first section extending along the circumferential direction of the mounting sleeve and a second section connected to the first section and extending in a spiral shape, and the first section is positioned on one side close to the locking head; a linear sliding guide mechanism is arranged between the sliding block and the mounting sleeve and is used for realizing the relative linear sliding guide of the sliding block and the mounting sleeve and limiting the relative rotation of the sliding block and the mounting sleeve; the side wall of the sliding block is provided with a notch portion, a first stop block and a second stop block which are spaced from each other are arranged in the notch portion, the first stop block and the second stop block are fixed on the rotating rod respectively, and the end portion of the shifting rod is inserted into the notch portion and located between the first stop block and the second stop block.

The outside of breach portion still is provided with the lantern ring, be provided with the screw on the lantern ring, the rotary rod spiro union in on the screw.

The linear sliding guide mechanism comprises a guide post arranged on the sliding block, a straight-through groove extending along the axial direction is formed in the mounting sleeve, and the guide post penetrates through the straight-through groove.

A plurality of second locking assemblies are arranged on the frame; the second locking assembly comprises a fixing frame, a locking block and a bolt, the locking block and the bolt are arranged on the fixing frame, a sliding groove is formed in the fixing frame, the locking block comprises a bottom plate and an insertion block, the insertion block is located on the bottom plate and erected upwards, the bottom plate is installed in the sliding groove in a sliding mode, a protruding hook portion is arranged on the side wall of the insertion block, a jack is arranged on the bottom plate, and the bolt can be inserted into the jack to lock the bottom plate on the fixing frame.

Be provided with the handle on the bolt still be provided with the handle lock on the frame, the handle lock includes the box body, is located locking spring and the U-shaped locking lever of box body, be provided with the groove of stepping down that is used for the handle to get into on the box body, locking spring top is on the U-shaped locking lever, thereby the U-shaped locking lever can thereby it seals the groove of stepping down to slide in the box body, the one end of U-shaped locking lever is provided with the extension section, the extension section is worn out the box body.

A third locking assembly is arranged above the first corner piece; the third locking assembly comprises a mounting seat and a first plug pin arranged on the mounting seat; the mounting seat is further provided with a rotating mechanism, a locking block is arranged at the end part of the first plug pin, and the rotating mechanism is used for driving the first plug pin to rotate.

The rotating mechanism comprises a guide block fixed on the mounting seat, a compression spring and two guide parts fixed on the first plug pin, the guide parts and the first plug pin are coaxially arranged, and the two guide parts are identical in structure and oppositely arranged; the wave-shaped edge is arranged on the guide parts and on one side opposite to the two guide parts, the wave-shaped edge comprises four wave crests and four wave troughs, the four wave crests and the four wave troughs are uniformly distributed in the circumferential direction, and the wave crests of the two guide parts are staggered; the guide block is inserted between the two wavy edges; the compression spring is abutted against the first plug pin and can apply elastic force towards the direction of the locking block to the first plug pin.

The guide part is annular and is fixed on the outer side wall of the first plug pin.

The invention also provides a railway transportation system, which comprises a freight train, an open-top container, the coil steel bracket base seat frame and the coil steel bracket, wherein the coil steel bracket base seat frame is arranged on the open-top container; the freight train comprises a plurality of freight flat cars, and the open-top container and the coil steel bracket base frame can be fixedly arranged on the freight flat cars; a second plug pin is arranged on the freight flat car, and the second plug pin can be plugged in a first corner piece of the base seat frame of the coil steel bracket and can be plugged in a second corner piece of the open-top container; the coil steel bracket is provided with a plug socket, and a locking head on the coil steel bracket base seat frame can be inserted into a socket formed in the plug socket.

The top four corners position and the bottom four corners position of uncovered container all are provided with the second corner fittings to make railway transportation system can form two kinds of use forms: the first mode is that the base seat frame of the coil steel bracket is fixed on a freight flat car, and the upside-down of the open-top container is fixed on the base seat frame of the coil steel bracket; the second mode is that the open-top container is positively fixed on the freight flat car, and the coil steel bracket base seat frame is reversely buckled and fixed on the open-top container. By adopting the technical scheme, the base seat frame of the coil steel bracket and the railway transportation system can be put on a freight flat car when in use, then the coil steel bracket is put on the base seat frame of the coil steel bracket, and coil steel is placed on the coil steel bracket for railway transportation; the first locking component is arranged on the coil steel bracket base seat frame, when the coil steel bracket is placed on the coil steel bracket base seat frame, the deflector rod is stirred and moves in the second section of the through groove to drive the sliding block to integrally slide in the mounting sleeve, so that the locking head gradually approaches and is inserted into the socket of the socket on the coil steel bracket, and meanwhile, the end part of the deflector rod leaves the first stop block and moves towards the second stop block, and the rotating rod cannot be driven to rotate; after the shifting lever moves to the first section of the through groove, the sliding block is not driven to move any more, and the end part of the shifting lever touches the second stop block, so that the rotating rod is driven to rotate, and the locking head is rotated and locked in the plug socket. The base seat frame of the coil steel bracket and the railway transportation system have simple structures and convenient operation, so that the railway transportation of the coil steel can be realized.

Drawings

FIG. 1 is a schematic view of the basic seat frame of the coil steel bracket of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is an exploded view of the first locking assembly.

Fig. 4 is a schematic structural view of the mounting sleeve.

Fig. 5 is a schematic view of an assembly structure of the sliding block and the rotating rod.

Fig. 6 is a partially enlarged view of portion B in fig. 1.

Fig. 7 is an exploded view of the handle lock.

Fig. 8 is an assembly structure diagram of the second locking assembly.

Fig. 9 is a schematic structural view of the third locking assembly and the first corner fitting.

Fig. 10 is an assembly structure view of the third locking pin.

Fig. 11 is a view illustrating an assembled structure state of the third locking pin after rotation.

Fig. 12 is a schematic view of a first state of the third locking pin.

Fig. 13 is a diagram illustrating a second state of the third locking pin.

Fig. 14 is a schematic view of a third state of the third locking pin.

Fig. 15 is a schematic view of a fourth state of the third locking pin.

Fig. 16 is a schematic structural view of the lower guide portion.

Fig. 17 is a schematic structural view of a first example of the freight flat car installation structure of the present invention.

Fig. 18 is an exploded view of fig. 17.

Fig. 19 is a schematic structural view of a second embodiment of the freight flat car assembling structure of the present invention.

Fig. 20 is an exploded view of fig. 19.

FIG. 21 is a schematic structural view of an embodiment of a coil steel vertical bracket.

FIG. 22 is a schematic structural view of another embodiment of a coil steel stand-up cradle.

FIG. 23 is a schematic structural view of an embodiment of a horizontal bracket for coil steel.

FIG. 24 is a schematic structural view of another embodiment of a coil steel horizontal bracket.

Fig. 25 is a schematic structural view of a third embodiment of the freight flat car assembling structure of the present invention.

Fig. 26 is an exploded view of fig. 25.

Fig. 27 is a schematic structural view of a fourth embodiment of the freight flat car assembling structure of the present invention.

Fig. 28 is an exploded view of fig. 27.

Fig. 29 is a schematic view of a railway transportation system of the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the detailed description.

As shown in fig. 1, a basic seat frame 300 of a coil steel bracket according to the present invention includes a frame 3, first corner pieces 31 are disposed at four corners of the frame 3, and a plurality of first locking assemblies 3a and a plurality of second locking assemblies 3b are further disposed on the frame 3; and a third locking assembly 3c is also provided above said first corner piece 31.

As shown in fig. 2 to 5, the first locking assembly 3a includes a mounting sleeve 301 fixed on the frame 3, a sliding block 302 located in the mounting sleeve 301, a rotating rod 303 passing through the sliding block 302, and a shift lever 304 mounted on the sliding block 302, wherein a locking head 305 is provided at an end of the rotating rod 303. The end of the rotating rod 303 far away from the locking head 305 passes through the sliding block 302 and is screwed on a limit nut 306.

A through slot is provided in the mounting sleeve 301, through which the shift lever 304 passes and can move along, the through slot including a first section 301a extending along the circumferential direction of the mounting sleeve 301 and a second section 301b connected to the first section 301a and extending in a spiral shape. The first segment 301a is located on a side close to the locking head 305, and in this embodiment, the arc of the first segment 301a is 90 °, and the arc of the second segment 301b extending helically is 90 °.

A linear sliding guide mechanism is arranged between the sliding block 302 and the mounting sleeve 301, and is used for realizing the relative linear sliding guide of the sliding block 302 and the mounting sleeve 301 and limiting the relative rotation of the sliding block 302 and the mounting sleeve 301. In this embodiment, the linear sliding guide mechanism includes a guide post 307 provided on the sliding block 302, and the mounting sleeve 301 is provided with a through groove 301c extending in the axial direction, and the guide post 307 passes through the through groove 301 c.

A notch 302a is formed in a side wall of the slider 302, a first stopper 308a and a second stopper 308b are disposed in the notch 302a and spaced from each other, the first stopper 308a and the second stopper 308b are respectively fixed to a first screw hole 303a and a second screw hole 303b of the rotating rod 303, and an end of the shift lever 304 is inserted into the notch 302a and located between the first stopper 308a and the second stopper 308 b.

A collar 309 is further disposed outside the notch portion 302a, a screw hole 309a is disposed on the collar 309, and the rotating rod 303 is screwed into the screw hole 309a and has an end portion passing through the screw hole 309 a.

In use, the coil steel bracket is placed on the coil steel bracket base mount 300 such that the locking head 305 is aligned with the socket of the plug socket of the coil steel bracket. The shifting lever 304 is shifted to enable the shifting lever 304 to move in the second section 301b of the through groove, so as to drive the sliding block 302 to slide in the mounting sleeve 301 towards the direction of the socket, so that the locking head 305 gradually approaches and is inserted into the socket of the socket, meanwhile, the end of the shifting lever 304 leaves the first stop block 308a to move towards the second stop block 308b, and the rotating rod 303 is not driven to rotate at this moment. When the shift lever 304 moves to the first section 301a of the through slot, the sliding block 302 is not driven to move any more, and at this time, the end of the shift lever 304 contacts the second stop 308b, so as to start driving the rotating rod 303 to rotate, and further, the locking head 305 rotates to be locked in the socket.

A plurality of second locking assemblies 3b are also provided on the frame 3. As shown in fig. 6-8, the second locking assembly 3b includes a fixing frame 371, a locking block 372 and a plug pin 373, the fixing frame 371 has a sliding groove 371a, the locking block 372 includes a bottom plate 372a and an upward-raised inserting block 372b located on the bottom plate 372a, the bottom plate 372a is slidably mounted in the sliding groove 371a, a side wall of the inserting block 372b is provided with a raised hook portion 372c, the bottom plate 372a is provided with an inserting hole (not shown), and the plug pin 373 can be inserted into the inserting hole to lock the bottom plate 372a to the fixing frame 371.

Be provided with the handle 374 on the bolt 373 be provided with the handle lock on the frame 3 still, the handle lock includes box body 375, is located the locking spring (not shown in the figure) and the U-shaped locking lever 376 of box body 375, be provided with the groove 375a of stepping down that is used for the handle 374 to get into on the box body 375, the locking spring top is on U-shaped locking lever 376, U-shaped locking lever 376 can slide thereby will step down groove 375a and seal in the box body 375, the one end of U-shaped locking lever 376 is provided with extension segment 376a, extension segment 376a pierces through the trompil 375b of box body 375.

When the locking device is used, the coil steel bracket is placed on the coil steel bracket base seat frame 300, the inserting block 372b of the locking block 372 is inserted into the clamping groove in the lower end face of the inserting seat, then the locking block 372 is moved, the hook part 372c is clamped in the clamping groove, and then the locking block 372 is locked on the frame 3 through the bolt 373.

As shown in fig. 9 and 10, a third locking assembly 3c is further disposed above the first corner piece 31. The third locking assembly comprises a first plug pin 32 and a mounting seat 33, a guide sleeve 34 is sleeved on the outer side of the first plug pin 32, the guide sleeve 34 is provided with a T-shaped head 341, the guide sleeve 34 is connected with the mounting seat 33 through a key, namely, the mounting seat 33 is provided with a key (not shown in the figure), and the guide sleeve 34 is provided with a key groove 342 matched with the key, so that the guide sleeve 34 and the mounting seat 33 can move linearly relatively and cannot rotate relatively. The first plug pin 32 can rotate relative to the guide sleeve 34.

A rotating mechanism is further arranged on the mounting seat 33, a locking block 321 is arranged at the end of the first plug pin 32, and the rotating mechanism is used for driving the first plug pin 32 to rotate.

The rotating mechanism includes a guide block 331 fixed on the mounting seat 33, a compression spring 35, and two guide portions, i.e., a lower guide portion 361 and an upper guide portion 362, fixed on the first plug pin 32, in this embodiment, the guide portions are independent annular members, fixedly sleeved on the outer side wall of the first plug pin 32 and coaxially disposed with the first plug pin 32, and in other embodiments, the guide portions may also form an integrally formed structure with the first plug pin 32. The two guides are identical in structure and are arranged oppositely, and wavy edges are arranged on the guides on the opposite sides of the two guides, namely the upper edge of the lower guide 361 and the lower edge of the upper guide 362 are respectively provided with wavy edges. The wavy edge comprises four wave crests 363 and four wave troughs 364, the four wave crests 363 and the four wave troughs 364 are uniformly distributed in the circumferential direction, namely, the wave crests 363 or the wave troughs 364 extend 90 degrees in the circumferential direction, and the wave crests 363 of the two guide parts are arranged in a staggered manner. In this embodiment, the area on the wavy edge and between two adjacent wave crests 363 is 7-shaped, including a vertical segment 365 and an inclined segment 366; the connection portion of the vertical segment 365 and the inclined segment 366 forms the wave trough 364 and is smoothly transited. The guide blocks 331 are two, are oppositely disposed at both sides of the first inserting pin 32, and are inserted between the wavy edges of the two guide portions.

The lower end of the compression spring 35 abuts against a bottom plate 332 fixed to the mounting seat 33, and the upper end abuts against the first plug pin 32 so as to apply an elastic force to the first plug pin 32 in a direction toward the locking block 321. The upper guide portion 362 abuts against the guide sleeve 34.

As shown in fig. 10 and 12, in this state, the locking block 321 is in the unlocking position, the compression spring 35 is in the extended state, the guide block 331 stays at a valley position of the lower guide portion 361, the valley position is an initial valley 364a, and the open top container 2 can be buckled on the frame 3 by a forklift. When the first inserting pin 32 is inserted into the second corner fitting 21 of the open-top container 2, the first inserting pin 32 is pressed by the inner wall of the second corner fitting 21 and moves downward, so that the guide block 331 is separated from the trough of the lower guide portion 361 until it touches one side of the peak 363 of the upper guide portion 362, as shown in fig. 13. When the first inserting pin 32 moves down further, the guide block 331 moves relatively along the edge of the upper guide portion 362, and at the same time, the first inserting pin 32 starts to rotate until the guide block 331 enters one of the wave troughs of the upper guide portion 362, and the compression spring 35 is in a compressed state, as shown in fig. 11 and 14. At this time, the open top container 2 can be lifted and transferred by the forklift, and when the frame 3 located below the open top container 2 is lifted at the same time during the transfer, specifically, when the open top container 2 starts to be lifted in the state shown in fig. 14, the first inserting pin 32 gradually loses the pressure of the inner wall of the second corner fitting 21, and the first inserting pin 32 gradually moves upward by the action of the compression spring 35, and the guide block 331 is separated from the valley of the upper guide portion 362 until it touches the peak 363 side of the lower guide portion 361, as shown in fig. 15. The guide block 331 and the first plug pin 32 continue to move relatively, and the guide block 331 finally moves into another wave trough adjacent to the initial wave trough 364a of the lower guide portion 361, and at this time, the locking block 321 rotates 90 ° relative to the unlocking station, so that the locking block 321 is still locked in the second corner fitting 21 and cannot be disengaged, and the frame 3 can be lifted up together when the open top container 2 is lifted up and moved. When the open-top container 2 is required to be separated from the frame 3, the actions of lowering and lifting the open-top container 2 are repeated, and the locking block 321 is rotated by 90 degrees continuously.

The first plug pin 32 may further include a mark portion, the mark portion is provided with an indication mark, the mounting seat 33 is provided with an observation window for observing the indication mark, and the rotation angle of the locking block 321 can be observed through the indication mark to determine the current locking state.

As shown in fig. 29, the present invention also provides a railway transportation system comprising a freight train, a coil steel bracket base chassis 300 as described above, and a coil steel bracket; the freight train comprises a plurality of freight flat cars 1 and a train power locomotive 400, the coil steel bracket base frame 300 is arranged on the freight flat cars 1, the freight flat cars 1 are provided with second plug pins 11, and the second plug pins 11 can be plugged into plug holes in first corner pieces 31 of the coil steel bracket base frame 300; the coil steel bracket is provided with a socket 431, and the locking head 305 on the coil steel bracket base frame 300 can be inserted into a socket formed in the socket 431.

As shown in fig. 21, the coil steel bracket includes a coil steel standing bracket 43a, and the coil steel standing bracket 43a includes a bottom frame 432 and a limiting member disposed on the bottom frame 432; the limiting member comprises two inclined brackets 433 which are oppositely arranged and a side baffle 434 connected between the two inclined brackets 433; the number of the side guards 434 is two, and the two side guards 434 can clamp the steel coil 100 therebetween.

A plurality of positioning grooves 4331 are formed in the inclined bracket 433, and the side guard 434 is detachably inserted into the positioning grooves 4331.

In another embodiment, as shown in fig. 22, two sets of locking members are disposed on the bottom frame 432.

In addition, the coil steel bracket may further include a coil steel horizontal bracket 43 b. As shown in fig. 23, a plurality of clamping blocks 435 are arranged on the horizontal bracket 43b for coil steel, and the plurality of clamping blocks 435 are distributed annularly and used for clamping the inner side wall of the coil steel 100. In another embodiment, as shown in fig. 24, two sets of latch 435 are disposed on the coil steel horizontal bracket 43b for holding two coils of steel.

The railway transportation system also comprises an open top container 2, wherein the top four corners and the bottom four corners of the open top container 2 are provided with second corner fittings 21, so that the railway transportation system can form two use forms: the first mode is that the coil steel bracket base seat frame 300 is fixed on the freight flat car 1, and the open top container 2 is reversely buckled and fixed on the coil steel bracket base seat frame 300; the second mode is that the open-top container 2 is positively fixed on the freight flat car 1, and the coil steel bracket base frame 300 is reversely fastened on the open-top container. As shown in fig. 17 to 18, in the first embodiment of the assembly structure of the freight flat car, the coil steel bracket base frame 300 is directly placed on the freight flat car 1, the coil steel bracket is placed on the coil steel bracket base frame 300, and the open-topped container 2 is reversely buckled on the coil steel bracket base frame 300 for transportation. As shown in fig. 19 to 20, in the second embodiment of the assembly structure of the freight flat car, after the coil steel is transported, the open-top container 2 can be placed on the freight flat car 1 for transporting other materials, and the coil steel bracket base chassis 300 can be buckled on the top of the open-top container 2 for transporting back, and meanwhile, powder materials such as fly ash can be transported in the open-top container 2. In addition, as shown in fig. 25 to 28, in the third and fourth embodiments of the freight flat car assembling structure, the open-top container 2 may not be placed on the coil steel bracket base frame 300 during transportation.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a roll up steel bracket basis chassis which characterized in that: the locking device comprises a frame, wherein first corner pieces are arranged at four corners of the frame, and a plurality of first locking assemblies are arranged on the frame; the first locking assembly comprises a mounting sleeve fixed on the frame, a sliding block positioned in the mounting sleeve, a rotary rod penetrating through the sliding block and a shifting lever mounted on the sliding block, a locking head is arranged at the end part of the rotary rod, a through groove is arranged on the mounting sleeve, the shifting lever penetrates through the through groove and can move along the through groove, the through groove comprises a first section extending along the circumferential direction of the mounting sleeve and a second section connected with the first section and extending in a spiral shape, and the first section is positioned on one side close to the locking head; a linear sliding guide mechanism is arranged between the sliding block and the mounting sleeve and is used for realizing the relative linear sliding guide of the sliding block and the mounting sleeve and limiting the relative rotation of the sliding block and the mounting sleeve; a notch part is formed in the side wall of the sliding block, a first stop block and a second stop block which are spaced from each other are arranged in the notch part, the first stop block and the second stop block are respectively fixed on the rotating rod, and the end part of the deflector rod is inserted into the notch part and is positioned between the first stop block and the second stop block; a plurality of second locking assemblies are arranged on the frame; the second locking assembly comprises a fixing frame, a locking block and a bolt, the locking block and the bolt are arranged on the fixing frame, a sliding groove is formed in the fixing frame, the locking block comprises a bottom plate and an insertion block which is located on the bottom plate and erected upwards, the bottom plate is installed in the sliding groove in a sliding mode, a protruding hook portion is arranged on the side wall of the insertion block, a jack is arranged on the bottom plate, and the bolt can be inserted into the jack to lock the bottom plate on the fixing frame.

2. The coil steel carrier base chassis of claim 1, wherein: the outside of breach portion still is provided with the lantern ring, be provided with the screw on the lantern ring, the rotary rod spiro union in on the screw.

3. The coil steel carrier base chassis of claim 1, wherein: the linear sliding guide mechanism comprises a guide post arranged on the sliding block, a through groove extending along the axial direction is arranged on the mounting sleeve, and the guide post penetrates through the through groove.

4. The coil steel carrier base chassis of claim 1, wherein: be provided with the handle on the bolt still be provided with the handle lock on the frame, the handle lock includes the box body, is located locking spring and the U-shaped locking lever of box body, be provided with the groove of stepping down that is used for the handle to get into on the box body, locking spring top is on the U-shaped locking lever, thereby the U-shaped locking lever can thereby it seals the groove of stepping down to slide in the box body, the one end of U-shaped locking lever is provided with the extension section, the extension section is worn out the box body.

5. The coil steel carrier base chassis of any one of claims 1-4, wherein: a third locking assembly is arranged above the first corner piece; the third locking assembly comprises a mounting seat and a first plug pin arranged on the mounting seat; the mounting seat is further provided with a rotating mechanism, a locking block is arranged at the end of the first plug pin, and the rotating mechanism is used for driving the first plug pin to rotate.

6. The coil steel bracket base chassis of claim 5, wherein: the rotating mechanism comprises a guide block fixed on the mounting seat, a compression spring and two guide parts fixed on the first plug pin, the guide parts and the first plug pin are coaxially arranged, and the two guide parts are identical in structure and oppositely arranged; the wave-shaped edge is arranged on the guide parts and on one side, opposite to the two guide parts, of each guide part, the wave-shaped edge comprises four wave crests and four wave troughs, the four wave crests and the four wave troughs are evenly distributed in the circumferential direction, and the wave crests of the two guide parts are arranged in a staggered mode; the guide block is inserted between the two wavy edges; the compression spring is abutted against the first plug pin and can apply elastic force towards the direction of the locking block to the first plug pin.

7. The coil steel bracket base chassis of claim 6, wherein: the guide part is annular and is fixed on the outer side wall of the first plug pin.

8. A railway transportation system, characterized by: comprising a freight train, an open-topped container, a coil steel carrier base frame according to any one of claims 1 to 7, and a coil steel carrier; the freight train comprises a plurality of freight flat cars, and the open-top container and the coil steel bracket base frame can be fixedly arranged on the freight flat cars; a second plug pin is arranged on the freight flat car, and the second plug pin can be plugged in a first corner piece of the base seat frame of the coil steel bracket and can be plugged in a second corner piece of the open-top container; the coil steel bracket is provided with a plug socket, and a locking head on the coil steel bracket base seat frame can be inserted into a socket formed in the plug socket.

9. The railway transportation system of claim 8, wherein: the top four corners position and the bottom four corners position of uncovered container all are provided with the second corner fittings to make railway transportation system can form two kinds of use forms: the first mode is that the base frame of the coil steel bracket is fixed on the freight flat car, and the upside-down of the open-top container is fixed on the base frame of the coil steel bracket; the second mode is that the open-top container is positively fixed on the freight flat car, and the coil steel bracket base frame is reversely buckled and fixed on the open-top container.