CN108974038B - Railway transportation frame special for coiled materials - Google Patents

Railway transportation frame special for coiled materials Download PDF

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Publication number
CN108974038B
CN108974038B CN201810944662.2A CN201810944662A CN108974038B CN 108974038 B CN108974038 B CN 108974038B CN 201810944662 A CN201810944662 A CN 201810944662A CN 108974038 B CN108974038 B CN 108974038B
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China
Prior art keywords
trapezoid
transverse positioning
groove
positioning device
trapezoid groove
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CN201810944662.2A
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CN108974038A (en
Inventor
王毅
杨诗卫
张宇
李建超
韩金刚
王爱民
谢林
黄瑞
袁亮
赵寿鑫
刘兵
林结良
李貌
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CRRC Meishan Co Ltd
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CRRC Meishan Co Ltd
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Priority to CN201810944662.2A priority Critical patent/CN108974038B/en
Publication of CN108974038A publication Critical patent/CN108974038A/en
Application granted granted Critical
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61FRAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F1/00Underframes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61DBODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D45/00Means or devices for securing or supporting the cargo, including protection against shocks
    • B61D45/001Devices for fixing to walls or floors
    • B61D45/003Fixing of logs, beams, barrels, pipes, or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61DBODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D45/00Means or devices for securing or supporting the cargo, including protection against shocks
    • B61D45/008Shock absorbing devices
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

The invention discloses a special railway transportation frame with a transverse positioning device for coiled materials. The automatic transverse positioning device is of a crank link structure arranged below the inclined plane of the trapezoid groove and can extend out of a telescopic blocking arm through an opening arranged on the inclined plane to be used for fixing coiled materials; the manual transverse positioning device is arranged at the top of the trapezoid groove and is arranged between the tops of the trapezoid grooves and comprises a stop lever which can move and be fixed along the tops of the trapezoid grooves and is used for fixing coiled materials; the surface of the trapezoid groove is also provided with a buffer device. The automatic and manual transverse positioning devices are mutually matched to realize the positioning of various plate-width coiled steels, the transportation requirement of the height Wen Juancai is met, and the buffer device is detachable; the manual device can realize unlocking and locking by pulling the handle from any side, and the automatic device can meet the fixing or releasing operation of coiled materials with different specifications without operation.

Description

Railway transportation frame special for coiled materials
Technical Field
The invention belongs to the technical field of railway wagon design and manufacture, and particularly relates to a special railway transportation frame with a transverse positioning device for coiled materials.
Background
In the existing railway transportation vehicles, coiled materials are transported, such as coiled steel, after being fixed by adopting a flat car additionally provided with a positioning device, the stability of the coiled materials cannot meet the requirements, the coiled materials are fixed in a complex manner, multiple persons are required to operate, and the efficiency is quite low. The special railway transportation flat car for coiled materials which do not need to be disassembled also has various defects to be improved, cannot adapt to the loading requirements of various different specifications of plate widths, particularly coiled steel, cannot simultaneously adapt to the loading requirements of hot rolled coiled steel or cold rolled coiled steel, and has the advantages of complex fixing device and low operation efficiency.
Disclosure of Invention
The invention aims at: aiming at the defects, the special railway transportation frame with the transverse positioning device for the coiled material is provided.
The invention is realized by the following technical scheme:
the special railway transportation frame for coiled materials comprises a railway flatbed underframe, wherein trapezoid grooves with wide upper part and narrow lower part for coiled materials are fixedly arranged on the underframe at intervals, and the special railway transportation frame is characterized in that:
the automatic transverse positioning device is of a crank link structure arranged below the trapezoid groove inclined plane and can extend out of the telescopic baffle arm through an opening arranged on the trapezoid groove inclined plane to be used for fixing coiled materials;
the manual transverse positioning device is arranged at the tops of the trapezoid grooves and arranged between the tops of the trapezoid grooves and comprises a stop lever which can move and be fixed along the tops of the trapezoid grooves and is used for fixing coiled materials.
The automatic transverse positioning device comprises a blocking arm, a spring support, a spring, a seat plate and a shaft, wherein the blocking arm is formed by a crank, a round pin and a roller, the crank is hinged with a bracket below the inclined plane of the trapezoid groove through the shaft, the roller is installed at the outer end of the crank through the round pin, the lower end of the crank is hinged with the spring support, one end of the spring is installed on the spring support, and the other end of the spring is connected with the underframe through the seat plate.
Further, two ends of a stop lever of the manual transverse positioning device respectively move along a sliding rail device arranged at the top of the trapezoid groove, the stop lever is of a hollow structure, and an operating mechanism of the manual transverse positioning device is arranged in the hollow structure.
The sliding rail device consists of a guide rail fixed at the top of the trapezoid groove and a positioning block at the inner side of the guide rail, and positioning grooves are formed in the positioning block at intervals; the two ends of the stop lever are provided with sliding holes which are sleeved into the guide rail to realize movement; the operating mechanism consists of a handle, a connecting block, a telescopic spring, a sliding block, a guide seat and a lock head which form a link mechanism to drive the lock head to open and close with the positioning groove so as to realize transverse fixation of the coiled material.
The coil buffering device is symmetrically arranged on the inclined surface of the trapezoid groove and comprises an embedded positioning groove fixed on the inclined surface of the trapezoid groove and a replaceable buffering block embedded and fixed in the positioning groove.
The trapezoid groove can be formed by manufacturing a bracket and a cross beam of a trapezoid framework by rectangular steel pipes, and welding and fixing a folding piece cover plate covered by the outer surface of the bracket on a bottom frame; the support and the cross beam form a cross grid structure, and a support is arranged between the inner side of the cross beam and the underframe.
The heat insulation layer for reserving and installing the flexible heat insulation material installation space can be arranged under the underframe floor surface.
According to the invention, retaining walls can be arranged on two sides of the underframe to prevent coiled materials from sliding out of the frame.
According to the invention, a plurality of groups of trapezoid grooves are longitudinally arranged along the frame, automatic transverse positioning devices are respectively arranged on the surfaces of two sides of the bottom of each trapezoid groove, and manual transverse positioning devices are arranged on two sides of the top of each trapezoid groove. The automatic transverse positioning device and the manual transverse positioning device are matched with each other, so that the automatic transverse positioning device is suitable for loading various transverse coiled materials with common specifications and special specifications, such as 900-2050 mm in coil diameter, 500-2000 mm in plate width and the like, and particularly for transporting and fixing coiled steel.
According to the invention, the detachable buffer block is arranged on the surface of the trapezoid groove and is used for directly contacting the coil steel when the coil steel is transported, and the buffer block can be detached and replaced according to different types of the loaded coil steel, so that the coil steel is more effectively protected. When loading hot rolled coil steel, the hot rolled coil steel is replaced by a high-temperature resistant buffer block; when the cold rolled coil steel is loaded, the buffer block made of polyurethane or rubber is replaced.
The invention is provided with the heat insulation layer below the floor surface of the underframe, reserves the installation space for installing common aluminum silicate silk blanket and other refractory materials, can meet the requirements of 300-500 ℃ for transporting coil steel for coil discharging, and the materials used in each part of the underframe can not pollute the coil steel under normal conditions or high temperature conditions.
When the automatic transverse positioning device is used for loading the coiled material with the special specification of plate width, when the coiled material is pressed on the roller, the crank can rotate anticlockwise around the shaft, the spring is compressed and simultaneously sinks under the inclined surface plate surface of the trapezoid groove, and at the moment, the transverse positioning of the coiled material can be realized by adjusting the manual transverse positioning device. When the coiled material is lifted off, the automatic transverse positioning device is under the action of spring force, and the crank rotates clockwise around the shaft and automatically resets. When loading the coiled material with fixed specification and plate width, the coiled material is placed between the two groups of automatic transverse positioning devices and the retaining wall. The standing baffle arm can meet the transverse positioning function of coiled materials.
The manual transverse positioning device is formed by assembling a positioning block, a guide rail, a handle, a stop lever, a connecting block, a telescopic spring, a guide seat, a lock head and a sliding block. The transverse positioning function of the special-specification plate-width coiled material can be realized by pushing the baffle arm to a proper position.
The operating mechanism of the manual transverse positioning device is fixed inside the stop lever through the guide seat, and can play a safety protection role of the operating mechanism. The operation process is as follows: the stop lever can slide left and right through the guide rail. The inner side of the stop lever is provided with a positioning block, and a plurality of positioning grooves are formed in the positioning block, so that the transverse positioning function of the stop lever can be realized. When the handle is pulled outwards, the lock head is separated from the positioning groove of the positioning gear, and the stop lever can be pushed to a proper position to clamp the coiled material at the moment, so that the transverse positioning function of the coiled material with the special specification and the plate width is realized. When the handle is loosened, the lock head enters the positioning groove of the positioning gear under the action of the telescopic spring, so that the position locking effect of the blocking arm of the blocking rod is realized.
The operating mechanism of the manual transverse positioning device can realize unlocking and locking functions of the stop lever by pulling the handle on any side by an operator. The operation process is as follows: when the handle at any side is pulled, the connecting block is linked to move outwards while the telescopic spring is compressed, and the sliding block is driven to move towards two ends respectively, so that synchronous unlocking action is realized. On the contrary, when the handles on any side are loosened, the telescopic springs are acted by the elasticity to return to the recovery position, the connecting blocks are linked to move inwards to drive the sliding block components to move towards the middle respectively, and synchronous locking action is achieved.
The beneficial effects of the invention are as follows:
1. the automatic transverse positioning device and the manual transverse positioning device are mutually matched to realize the transverse positioning function of various plate-width coiled steels.
2. The heat insulation layer is arranged below the floor surface of the underframe, the installation space for installing refractory materials such as common aluminum silicate silk blanket and the like is reserved, the requirements of 300-500 ℃ of transportation coil steel can be met, and the materials used in all parts of the underframe can not pollute the coil steel under normal conditions or high temperature conditions.
3. According to different types of coiled materials, the buffer block can be replaced, so that the coiled steel can be protected more effectively. Particularly, when the coil steel material is loaded, the buffer block is replaced by a buffer block with high temperature resistance when the coil steel is hot rolled; the buffer block is replaced by polyurethane or rubber material when cold rolling steel.
4. The operating mechanism of the manual transverse positioning device can realize that an operator can pull the handle on any side, can realize the unlocking and locking functions of the stop lever, and can meet the fixing or releasing operation of coiled materials with different specifications without operation.
Drawings
FIG. 1 is a schematic view of a frame structure of the present invention;
FIG. 2 is an enlarged partial schematic view of a trapezoid slot of the frame of the present invention;
FIG. 3 is an enlarged schematic view of the automatic positioning device of the vehicle frame of the present invention;
FIG. 4 is a schematic view of the manual positioning device of the frame of the present invention;
FIG. 5 is a schematic plan view of the manual positioning device of the frame of the present invention;
FIG. 6 is a schematic view of a frame buffer of the present invention.
Reference numerals in the drawings: 1 is a trapezoid groove, 1a is a bracket, 1b is a cover plate, 1d is a cross beam, 1e is a support, 2 is an automatic transverse positioning device, 2a is a crank, 2b is a round pin, 2c is a roller, 2d is a spring support, 2e is a spring, 2f is a seat plate, 2g is a shaft, 3 is a manual transverse positioning device, 3a is a positioning block, 3b is a guide rail, 3c is a handle, 3d is a stop lever, 3e is a connecting block, 3f is a telescopic spring, 3g is a guide seat, 3h is a lock head, 3i is a slide block, 4 is a buffer block. 4b is a rail, 4c is a bottom rail, 5 is a retaining wall, and 6 is a chassis.
Detailed Description
The present invention will be further described with reference to the following specific embodiments, which are intended to be illustrative of the principles of the present invention and not in any way limiting, nor will the same or similar techniques be used in connection with the present invention beyond the scope of the present invention.
In combination with the accompanying drawings.
As shown in the figure, the special railway transportation frame for coiled materials comprises a railway flatbed underframe 6, trapezoid grooves 1 with wide upper part and narrow lower part are fixedly arranged on the underframe 6 at intervals, automatic transverse positioning devices 2 are arranged on the inclined surfaces of the trapezoid grooves 1, the automatic transverse positioning devices 2 are crank link structures arranged below the inclined surfaces of the trapezoid grooves 1, and telescopic baffle arms can extend out through openings arranged on the inclined surfaces to be used for fixing the coiled materials; the top of the trapezoid groove 1 is provided with a manual transverse positioning device 3, and the manual transverse positioning device 3 is arranged between the tops of the trapezoid grooves 1 and comprises a stop lever 3d which can move and be fixed along the tops of the trapezoid grooves 1 and is used for fixing coiled materials.
The automatic transverse positioning device 2 comprises a retaining arm formed by a crank 2a, a round pin 2b and a roller 2c, and also comprises a spring support 2d, a spring 2e, a seat board 2f and a shaft 2g, wherein the crank 2a is hinged with a bracket 1a under the inclined plane of the trapezoid groove 1 through the shaft 2e, the roller 2c is arranged at the outer end of the crank 2a through the round pin 2b, the lower end of the crank 2a is hinged with the spring support 2d, one end of the spring 2e is arranged on the spring support 2d, and the other end of the spring 2e is connected with the underframe 6 through the seat board 2 f.
According to the manual transverse positioning device 3, two ends of a stop rod 3d respectively move along a sliding rail device arranged at the top of a trapezoid groove 1, the stop rod 3d is of a hollow structure, and an operating mechanism of the manual transverse positioning device 3 is arranged in the hollow structure. The sliding rail device consists of a guide rail 3b fixed at the top of the trapezoid groove 1 and a positioning block 3a arranged at the inner side of the guide rail 3b, and positioning grooves are formed in the positioning block 3a at intervals; the two ends of the stop lever 3d are provided with sliding holes which are sleeved into the guide rail 3b to realize movement; the operating mechanism comprises a handle 3c, a connecting block 3e, a telescopic spring component 3f, a sliding block component 3i, a guide seat 3g and a lock head 3h, wherein the link mechanism is used for driving the lock head 3h to open and close with the positioning groove so as to realize transverse fixation of the coiled material.
In order to adapt to the fixation and transportation of different coiled materials, the inclined surface of the trapezoid groove 1 is symmetrically provided with a coiled material buffer device 4, and the buffer device 4 comprises an embedded positioning groove fixed on the inclined surface of the trapezoid groove 1 and a replaceable buffer block 4a with the embedded and fixed positioning groove. And a heat insulation layer for reserving a mounting space for mounting the flexible heat insulation material can be arranged under the floor surface of the underframe 6.
The trapezoid groove 1 is formed by welding and fixing a bracket 1a and a cross beam 1d of a trapezoid framework made of rectangular steel pipes and a folding piece cover plate 1b covered on the outer surface of the bracket 1a on a bottom frame 6; the bracket 1a and the cross beam 1d form a cross grid structure, and a support 1e is arranged between the inner side of the cross beam 1d and the underframe 6.
The invention is provided with retaining walls 5 on both sides of the chassis for preventing coiled materials from sliding out of the chassis.
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the special railway transportation frame for coiled materials comprises a plurality of groups of trapezoid grooves 1 longitudinally arranged along a frame 6, two groups of automatic transverse positioning devices 2 are respectively arranged at two sides of the bottom of each trapezoid groove 1, two groups of manual transverse positioning devices 3 are arranged at two sides of the top of each trapezoid groove 1, and the automatic transverse positioning devices 2 and the manual transverse positioning devices 3 are mutually matched for operation, so that the special railway transportation frame is suitable for loading transverse coiled materials with various common specifications and special specifications, wherein the coil diameters of the transverse coiled materials are 900-2050 mm, and the plate widths of the transverse coiled materials are 500-2000 mm. The surface of the trapezoid groove 1 is provided with a detachable buffer block 4a which is in direct contact with coiled materials, and particularly when the coiled steel is carried, the buffer block 4a can be detached and replaced according to different types of the loaded coiled steel, so that the coiled steel is effectively protected. When loading hot rolled coil steel, the hot rolled coil steel is replaced by a high-temperature resistant buffer block 4a; when the cold rolled steel is loaded, the buffer block 4a made of polyurethane or rubber is replaced. Two groups of pedals are respectively arranged at the two ends of the underframe 6, so that operators can watch and pedal the vehicle conveniently. The heat insulation layer is arranged under the floor surface of the underframe 6, the installation space for installing refractory materials such as common aluminum silicate silk blanket is reserved, the requirement of 300-500 ℃ of transportation coil steel can be met, and the materials used in all parts of the underframe 6 can not pollute the coil steel under normal conditions or high temperature conditions.
As shown in fig. 2 and 3, a trapezoid groove 1 is made by bending a rectangular steel pipe into a bracket 1a of a trapezoid framework and a folding piece cover plate 1b covered on the outer surface of the bracket 1a, a buffer device 4 for fixing a buffer block 4a is arranged on the surface of the trapezoid groove 1, the bracket 1a and a cross beam 1d form a cross grid structure, and a support 1e is arranged on the inner side of the cross beam 1d correspondingly.
As shown in fig. 2 and 3, the automatic lateral positioning device 2 is assembled by a crank 2a, a round pin 2b, a roller 2c, a spring support 2d, a spring 2e, a seat plate 2f, and a shaft 2 g. The crank 2a is fixed on the bracket 1a through the shaft 2g, the roller 2c is arranged at the upper end of the crank 2a through the round pin 2b to form a blocking arm, the lower end of the crank 2a is hinged with the spring support 2d, the spring 2e is arranged on the spring support 2d, and the lower part of the spring support 2d is connected with the underframe through the seat plate 2 f. When the coil is pressed against the roller 2c, the crank 2a rotates counterclockwise about the shaft 2g, while compressing the spring 2e, while sinking under the inclined surface of the trapezoidal groove 1, at which time the transverse positioning of the coil is achieved by adjusting the manual transverse positioning device 3. When the coiled material is lifted off, the automatic transverse positioning device 2 is under the action of the elastic force of the spring 2e, and the crank 2a rotates clockwise around the shaft 2g and is automatically reset. When loading the coiled material with fixed specification and plate width, the coiled material is placed between the automatic transverse positioning device 2 and the retaining wall 5. The standing baffle arm can meet the transverse positioning function of coiled materials.
As shown in fig. 4 and 5, the manual transverse positioning device 3 is assembled by a positioning block 3a, a guide rail 3b, a handle 3c, a stop lever 3d, a connecting block 3e, a telescopic spring component 3f, a guide seat 3g, a lock head 3h and a slide block component 3 i. The stop lever 3d is pushed to a proper position to realize the transverse positioning function of the special specification board width coiled material. The operating mechanism of the manual transverse positioning device 3 is fixed inside the stop lever 3d through the guide seat 3g, so that the safety protection function of the operating mechanism can be realized. The operation process is as follows: the bar 3d can slide left and right through the guide rail 3 b. The inner side of the stop lever 3d is provided with a positioning block 3a, and the positioning block 3d is provided with a plurality of positioning grooves, so that the transverse positioning effect of the stop lever 3d can be realized. When the handle 3c is pulled outwards, the lock head 3h is separated from the positioning groove of the positioning block 3a, and the stop lever 3d can be pushed to a proper position to clamp coiled materials at the moment, so that the transverse positioning function of the coiled materials with special specifications is realized. When the handle 3c is released, the lock head 3h enters a positioning groove of the positioning gear 3a under the action of the telescopic spring 3f, so that the position locking effect of the stop lever 3d is realized.
The operating mechanism of the manual transverse positioning device 3 can realize that an operator pulls the handle 3c on any side, and can realize unlocking and locking actions of the stop lever 3d. The operation process is as follows: when the handle 3c at any side is pulled, the connecting block 3e moves outwards while the telescopic spring 3f is compressed, and the sliding block component 3i is driven to move towards two ends respectively, so that synchronous unlocking actions are realized. On the contrary, when the handle 3c at any side is loosened, the telescopic spring 3f is acted by the elastic force to return to the restoring position, the connecting block 3e moves inwards, and the sliding block component 3i is driven to move towards the middle respectively, so that synchronous locking action is realized.

Claims (5)

1. The utility model provides a special railway transportation frame of coiled material, includes the railway flatbed chassis, the interval arrangement is fixed with the trapezoidal slot that is used for the coiled material to place on the chassis, its characterized in that:
the automatic transverse positioning device is of a crank link structure arranged below the trapezoid groove inclined plane and can extend out of the telescopic baffle arm through an opening arranged on the trapezoid groove inclined plane to be used for fixing coiled materials; the automatic transverse positioning device comprises a blocking arm formed by a crank, a round pin and a roller, and also comprises a spring support, a spring, a seat plate and a shaft, wherein the crank is hinged with a bracket below the inclined plane of the trapezoid groove through the shaft;
the manual transverse positioning device is arranged at the top of the trapezoid groove and arranged between the tops of the trapezoid grooves and comprises a stop lever which can move and be fixed along the tops of the trapezoid grooves and is used for fixing coiled materials; the two ends of the stop lever of the manual transverse positioning device respectively move along the sliding rail device arranged at the top of the trapezoid groove, the stop lever is of a hollow structure, and an operating mechanism of the manual transverse positioning device is arranged in the hollow structure;
the slide rail device consists of a guide rail fixed at the top of the trapezoid groove and a positioning block at the inner side of the guide rail, and positioning grooves are formed in the positioning block at intervals; the two ends of the stop lever are provided with sliding holes which are sleeved into the guide rail to realize movement; the operating mechanism consists of a handle, a connecting block, a telescopic spring and a sliding block, and the guide seat and the lock head form a link mechanism to drive the lock head to open and close with the positioning groove so as to realize transverse fixation of the coiled material; when the handles on any side are pulled, the connecting blocks move outwards while the telescopic springs are compressed, and the sliding block components are driven to move towards two ends respectively, so that synchronous unlocking actions are realized; when the handles on any side are loosened, the telescopic springs are acted by the elastic force to return to the reset position, the connecting blocks move inwards along with the telescopic springs, and the sliding block assemblies are driven to move towards the middle respectively, so that synchronous locking action is realized.
2. The coil-specific railway transportation carriage according to claim 1, wherein: coiled material buffer devices are symmetrically arranged on the inclined surface of the trapezoid groove, and each buffer device comprises an embedded positioning groove and a replaceable buffer block, wherein the embedded positioning groove and the replaceable buffer block are fixed on the inclined surface of the trapezoid groove.
3. The coil-specific railway transportation carriage according to claim 2, wherein: the trapezoid groove is formed by making a bracket and a cross beam of a trapezoid framework by rectangular steel pipes, and a folding piece cover plate covered on the outer surface of the bracket and fixing the folding piece cover plate on the underframe by welding; the support and the cross beam form a cross grid structure, and a support is arranged between the inner side of the cross beam and the underframe.
4. The coil-specific railway transportation carriage according to claim 2, wherein: and a heat insulation layer for reserving and installing a flexible heat insulation material installation space is arranged below the underframe floor surface.
5. The coil-specific railway transportation carriage according to claim 2, wherein: retaining walls are arranged on two sides of the underframe.
CN201810944662.2A 2018-08-19 2018-08-19 Railway transportation frame special for coiled materials Active CN108974038B (en)

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CN108974038B true CN108974038B (en) 2023-08-08

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