CN117415196A

CN117415196A - Brake pipe line bending device

Info

Publication number: CN117415196A
Application number: CN202311421126.1A
Authority: CN
Inventors: 李惊强; 于洋; 成宝
Original assignee: Nanjing Haigaode New Technology Co ltd
Current assignee: Nanjing Haigaode New Technology Co ltd
Priority date: 2023-10-30
Filing date: 2023-10-30
Publication date: 2024-01-19

Abstract

The application discloses a brake pipe pipeline bending device, which belongs to the field of pipe fitting processing; the device comprises a mounting seat, wherein the mounting seat is provided with a rotatable mounting pipe, at least three arc-shaped sheets are radially and movably mounted on the outer wall of the mounting pipe, each arc-shaped sheet is provided with a first position surrounding a cylinder and a second position radially far away from the mounting pipe, an adjusting assembly is movably mounted in the mounting pipe and acts on the adjusting assembly to switch the first position and the second position of each arc-shaped sheet, and a first bending die is inserted on the outer wall of each arc-shaped sheet; the outer wall of the mounting pipe is provided with a radially movable pressing piece which is movably abutted against the first bending die, one side of the mounting pipe is provided with a pipe fitting limiting part, and the pipe fitting limiting part is used for limiting and abutting against the brake pipe; when the brake pipe is used, the radial movement of the arc plates is controlled through the driving of the adjusting component, the replacement of the first bending dies with different diameters is realized, the operation is simple, the use is convenient, and the production efficiency of the brake pipe with different bending arc diameters is greatly improved.

Description

Brake pipe line bending device

Technical Field

The application relates to the technical field of pipe fitting processing equipment, in particular to a brake pipe pipeline bending device.

Background

The air pipe used for braking the longitudinal train is a braking pipe, also called a train pipe, and is connected with a single-pipe air supply bus, for example, a 22 type train, a 25B type train, an early 25G type train and the like, and only the train pipe is required to be connected; in the brake pipe processing process of rail vehicles, the brake pipe is required to be controlled to be bent, so that the brake pipe can be conveniently installed and used, a common pipe bending machine is fed by manpower or a machine, the bending piece is controlled to rotate to bend a pipe fitting through the limit of the limit piece, the radian diameter of the bent pipe fitting of the existing pipe bending machine is difficult to adjust, the single bending arc diameter of the pipe bending machine can bring influence to the production efficiency, the adaptability is weaker, if the bending piece is detached and replaced in a traditional mode (a conventional mode), the production efficiency is greatly reduced in such an operation mode, and the change of the bending arc diameter of the pipe bending equipment is required to be considered and solved by technicians.

Disclosure of Invention

The utility model aims at providing a system pipe bending device to solve the arc footpath ratio of the crooked pipe fitting of bending machine that leads to among the prior art single, the change curved member of conventional dismantlement satisfies different crooked arc footpath, complex operation has reduced production efficiency.

In order to achieve the above purpose, the present application is implemented by adopting the following technical scheme:

the brake pipe pipeline bending device comprises a mounting seat, wherein the mounting seat is provided with a rotatable mounting pipe, at least three arc-shaped sheets are radially and movably arranged on the outer wall of the mounting pipe, each arc-shaped sheet is provided with a first position surrounding a cylinder and a second position radially far away from the mounting pipe, an adjusting assembly is movably arranged in the mounting pipe, and the adjusting assembly is acted to switch the first position and the second position of each arc-shaped sheet, and a first bending die is inserted into the outer wall of each arc-shaped sheet; the mounting pipe outer wall is equipped with radially movable's compress tightly the piece, compress tightly piece activity butt first bending die, pipe fitting spacing portion has been arranged to mounting pipe one side, and pipe fitting spacing portion is used for spacing butt brake pipe.

This application further scheme, adjusting part includes a pair of axial movable mounting drive piece in installation tube cavity, and installs intraductal rotation and be provided with two-way screw rod, two-way screw rod both ends and the drive piece screw-thread fit that corresponds, be equipped with three at least installing ports radially on the installation tube body, and every it is connected with the cross structure to rotate between the installing port lateral wall, and cross structure one side swing joint corresponds the drive piece, opposite side swing joint arc piece, cross structure cross angle changes to increase or reduce the interval between arc piece and the installation tube

Through adopting above-mentioned technical scheme, the equidirectional bidirectional screw rod that rotates can drive two drive blocks and be close or move apart from each other, the production motion of drive cross structure that can be quick, operating efficiency, degree of synchrony are higher than the device of distribution regulation, and stability of regulation is higher, and cross structure support intensity is big, can satisfy the moment of torsion that receives when first bending die bends the brake pipe.

In a further scheme, the cross structure comprises a first connecting rod and a second connecting rod which are rotatably connected in the middle, and the first connecting rod and the second connecting rod are rotatably connected between the side walls of the mounting port;

the arc piece and the drive block are oppositely upwards provided with a plurality of arc grooves, one end of the first connecting rod is movably arranged on the upper portion of the arc groove on the outer wall of the drive block, the other end of the first connecting rod penetrates out of the arc groove on the lower end of the arc piece, one end of the second connecting rod is movably arranged on the lower portion of the arc groove on the outer wall of the drive block, and the other end of the second connecting rod penetrates out of the arc groove on the upper end of the arc piece.

Through adopting above-mentioned technical scheme, the rotation position setting of first connecting rod and second connecting rod in the cross structure is in the installing port department, can guarantee that the fixed first bending die horizontal position is unchangeable around two connecting rods warp, further realizes the stable regulation of structure, improves the regulation degree of accuracy of device.

Optionally, the first mounting panel is radially fixed with to the mounting tube outer wall, and is fixed with first cylinder on the first mounting panel, compress tightly the telescopic link of piece fixed connection first cylinder.

Through adopting above-mentioned technical scheme, first mounting panel is fixed on the installation tube, and during the use, first cylinder drives and compresses tightly the piece and laminate first bending die of brake pipe butt, and the installation tube is when rotating, compresses tightly the piece and can follow the synchronous rotation of installation tube, guarantees the bending effect.

In a further aspect of the application, the height of the mounting tube is adjustable; the installation seat is hollow, the top of the installation seat is rotatably provided with a limit sleeve, and the installation pipe movably penetrates through the limit sleeve and is rotatably connected with a hydraulic shaft of a hydraulic rod at the bottom of the installation seat.

By adopting the technical scheme, the flexibility of the device is ensured, the device can be adaptively adjusted when facing different equipment installation environments, the adaptability of the device is enhanced, and the device can be installed and used in special terrains.

This application further scheme still is fixed with second bending die, second mounting panel on the body of installation tube, be fixed with the second cylinder on the second mounting panel, be fixed with the compact heap on the telescopic link of second cylinder, the compact heap activity acts on the second bending die.

Through adopting above-mentioned technical scheme, fixed second crooked mould on the installation tube, the shape of second crooked mould can design into irregular model, increases the operation scope of device, realizes that a tractor serves several purposes, and the reinforcing customer's experience is felt, adapts to modern society diversified production.

According to the further scheme, the first gear and the second gear are fixedly arranged on the installation pipe body below the second bending die at intervals, the driving motor is fixed on the installation seat through the motor installation plate, the output shaft of the driving motor is connected with the speed reducer, the third gear is arranged on the speed reducer through the rotating shaft, the hydraulic rod stretches, and the third gear is intermittently meshed with the first gear or the second gear.

Through adopting above-mentioned technical scheme, the drive structure is driven in the design of pertinence in this scheme, needs to satisfy the switching drive of first crooked mould and second crooked mould, and when two crooked moulds switch and use, the installation needs to go up and down, uses the drive of the matching of first, second gear, and high-efficient stable completion installation tube and the crooked mould rotation in different positions.

This application further scheme, pipe fitting spacing portion is including arranging the first slide in mount pad one side, and slidable mounting has first fixed plate on the first slide, and slidable mounting of constraint on the first fixed plate has the constant head tank board, and constant head tank board sliding direction and first fixed plate sliding direction are perpendicular, it is equipped with the lead screw to rotate between the first slide middle part, first fixed plate is fixed with first nut towards lead screw one side, and first nut and lead screw thread fit installation, the lead screw rotates, first fixed plate linear movement.

Through adopting above-mentioned technical scheme, first fixed plate drives the spacing brake pipe of constant head tank board butt under the removal of lead screw, and the brake pipe is in the in-process of carrying out bending operation, and the one end that the bending mould was kept away from in the braking has the trend of pitch arc motion, and under the location of constant head tank board this moment, can prevent that the brake pipe from removing, and the in-process constant head tank board of bending can follow the brake pipe and remove, and relative brake pipe is direct to scratch on the constant head tank board, and this design can prevent that the brake pipe surface is injured.

This application further scheme, the device still includes pipe fitting conveying portion, conveying portion includes the workstation, and the workstation is arranged one side that the mount pad was kept away from to pipe fitting spacing portion, slidable mounting has the ware that shifts on the workstation, and the ware that shifts is passed through the drive of third cylinder, and the workstation is close to one side of pipe fitting spacing portion and is erect the uptake roller.

By adopting the technical scheme, the positioner clamps the brake pipe, the brake pipe is driven by the third cylinder to move along the direction of the bending die steadily, the bending direction of the brake pipe is continuously changed by pushing and rotating the positioner to match with the corresponding bending die, and then the production requirement is met.

Optionally, the side of the workbench is also obliquely provided with a plurality of mutually parallel bearing rods, and the contacted side part of the bearing rods and the workbench is vertically provided with a grid blocking cylinder. The brake pipe on the receiving rod is released by the contraction of the check cylinder, so that the processing efficiency can be improved, and the production capacity can be increased.

According to the technical scheme, the application has the following effects:

when this application is used, through the radial removal of a plurality of arc of drive control of adjusting part, realize the first bending die of different diameters and change, its dismantlement mounting speed is faster, realizes the change of the first bending die of different sizes in the short time, easy operation, convenient to use, very big improvement the production efficiency of the different crooked arc footpath of brake pipe.

The adjusting assembly synchronously controls the first connecting rod and the second connecting rod to do scissor-like movement by using the bidirectional screw rod so as to meet the requirement of quickly adjusting the distance between the arc-shaped sheets, further improvement of the replacement efficiency of the first bending die is realized, and meanwhile, the locking degree of the screw rod adjusting mode of the bidirectional screw rod is higher, namely the strength of the arc-shaped sheets for supporting the first bending die is higher;

in addition, the side edge of the workbench in the device is also provided with a material temporary storage area, and a certain number of brake pipes can be accommodated in the temporary storage area, so that the workbench is convenient for workers to take and the operation efficiency is quickened.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a schematic view of a pipe bending portion structure in an embodiment of the present application.

Fig. 3 is a schematic front view of a pipe bending portion according to an embodiment of the present application.

Fig. 4 is a schematic structural view of an embodiment of the present application for embodying a crossing structure in a pipe bending portion.

Fig. 5 is a schematic view of the structure of the limiting sleeve and the inner structure of the mounting tube in the bending part of the pipe fitting according to the embodiment of the present application.

Fig. 6 is a schematic structural view of a pipe limiting portion in an embodiment of the present application.

Fig. 7 is a schematic structural view of a pipe conveying section in the embodiment of the present application.

Wherein: 1. A pipe conveying part; 11. a work table; 12. a second slide rail; 13. a third cylinder; 14. a positioner; 15. a second fixing plate; 16. a servo motor; 17. a rack; 18. a receiving roller; 19. a material temporary storage area; 2. a workpiece limiting part; 21. a first slider; 22. a first fixing plate; 23. positioning a groove plate; 24. a first slide rail; 241. a first slider; 25. a screw rod; 26. dovetail blocks; 261. a dovetail groove; 27. a spring; 28. a second slider; 29. a first motor; 3. a pipe bending portion; 31. installing a pipe; 32. an arc-shaped sheet; 33. an adjustment assembly; 331. a first connector; 332. a second connector; 333. a driving block; 334. a bidirectional screw; 335. adjusting a motor; 34. a first bending die; 35. a pressing member; 351. a first mounting plate; 352. a first cylinder; 36. a mounting base; 371. a driving motor; 372. a speed reducer; 373. a third gear; 374. a first gear; 375. a second gear; 38. a crossing structure; 381. a first connecting rod; 382. a second connecting rod; 383. a ball; 39. an arc-shaped groove; 51. a second mounting plate; 52. a second cylinder; 53. a compaction block; 54. a second bending die; 6. a hydraulic rod; 61. a limiting plate; 62. a limit groove; 63. a limit sleeve; 4. a brake pipe.

Detailed Description

In order to make the technical means, the creation features, the achievement of the purpose and the effect achieved in the present application easy to understand, the present application is further described below in connection with the specific embodiments.

It should be noted that, in the description of the present application, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present application and do not require that the present application must be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present application. The terms "front", "back", "left", "right", "upper", "lower" as used in the description of this application refer to directions in the drawings, and the terms "inner", "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

As shown in fig. 1, the application discloses a brake pipe 4 pipeline bending device, which comprises a pipe conveying part 1, a pipe limiting part 2 and a pipe bending part 3, wherein the pipe bending part 3 and the pipe conveying part 1 are arranged at two sides of the pipe limiting part 2, a brake pipe 4 is installed on the pipe conveying part 1, and the pipe limiting part 2 is used for limiting and abutting against the brake pipe 4; the pipe bending part 3 is provided with a rotatable mounting pipe 31, three arc-shaped pieces 32 are radially movably mounted on the outer wall of the mounting pipe 31, each arc-shaped piece 32 is provided with a first position which is radially close to the mounting pipe 31 and a second position which is radially far away from the mounting pipe 31, an adjusting component 33 is arranged in the mounting pipe 31, the adjusting component 33 is acted, so that the first position and the second position of each arc-shaped piece 32 are switched, a first bending die 34 is further abutted to the outer wall of each arc-shaped piece 32, a radially movable pressing piece 35 is arranged on the outer wall of the mounting pipe 31, and the pressing piece 35 is movably abutted to the first bending die 34.

When the pipe fitting conveying part 1 is used, the brake pipe 4 is conveyed to the pipe fitting bending part 3, the workpiece limiting part 2 is started to be abutted against the pipe body of the brake pipe 4, the end part of the brake pipe 4 is attached to the first bending die 34, the pressing piece 35 is moved to fix the end part of the brake pipe 4, and the brake pipe 4 is bent by rotating the mounting pipe 31.

Referring to fig. 2 to 4, the pipe bending portion 3 in the present embodiment includes a mounting seat 36, a mounting pipe 31 is rotatably disposed on the mounting seat 36, a speed reducer 372 is fixed on one side of the mounting seat 36, a driving motor 371 is fixed at an input end of the speed reducer 372, a third gear 373 is mounted at an output end of the speed reducer 372 via a short shaft, a first gear 374 is fixed on the mounting pipe 31, the third gear 373 is engaged with the first gear 374, and the driving motor 371 drives the mounting pipe 31 to rotate;

the adjusting component 33 in the embodiment is installed in the box body of the installation tube 31, and the adjusting component 33 comprises a first connecting piece 331, a second connecting piece 332, two driving blocks 333, three arc-shaped pieces 32 and three groups of crossing structures 38; the first connecting piece 331 and the second connecting piece 332 are axially fixed on the inner wall of the cavity of the mounting tube 31 at intervals, a bidirectional screw rod 334 is rotatably arranged between the first connecting piece and the second connecting piece, an adjusting motor 335 is fixed on one side of the first connecting piece, which faces away from the bidirectional screw rod 334, an output shaft of the adjusting motor 335 is in transmission connection with the bidirectional screw rod 334, one driving block 333 is arranged at a positive threaded end of the bidirectional screw rod 334 in a threaded fit manner, and the other driving block 333 is arranged at a reverse threaded end of the bidirectional screw rod 334 in a threaded fit manner; three mounting openings are radially and equidistantly formed in the wall of the mounting pipe 31, the middle of the cross structure 38 is rotatably mounted between the side walls of the mounting openings, two ends of the cross structure 38 are correspondingly and movably connected with corresponding driving blocks 333 and arc-shaped pieces 32, a first mounting plate 351 is radially mounted on the outer wall of the mounting pipe 31, a first air cylinder 352 is fixed on the first mounting plate 351, and a compression piece 35 is fixedly connected with a telescopic rod of the first air cylinder 352.

Continuing to observe fig. 4, the cross structure 38 in this embodiment includes a first connecting rod 381 and a second connecting rod 382, where the ends of the first connecting rod 381 and the second connecting rod 382 are both rotatably equipped with balls 383, the middle parts of the first connecting rod 381 and the second connecting rod 382 are hinged and fixed between the corresponding installation opening sidewalls of the installation tube 31, the corresponding positions of the driving blocks 333 and the arc sheets 32 are provided with arc grooves 39, the balls 383 at one end of the first connecting rod 381 are placed in the arc grooves 39 of the upper driving block 333, the balls 383 at one end of the second connecting rod 382 are placed in the arc grooves 39 of the lower driving block 333, the balls 383 at the other end are placed in the arc grooves 39 of the upper part of the corresponding arc sheets 32, the adjusting motor 335 drives the bidirectional screw 334 to rotate, and drives the two driving blocks 333 to move away or relatively, so that the arc grooves 39 on each driving block 333 correspondingly squeeze the first or second connecting rod 382, and finally the space between the arc sheets 32 and the installation tube 31 is changed, and the first bending die 34 with different diameters can be replaced rapidly.

In some embodiments, the first bending mold 34 is prevented from sliding during the bending operation, the outer wall of the arc-shaped piece 32 can be provided with anti-slip lines, a short protruding shaft can be welded, and the inner wall of the first bending mold 34 is correspondingly provided with positioning holes, so that the first bending mold 34 can be firmly fixed on the arc-shaped piece 32.

Continuing to observe 2, 3, 5, the installation pipe 31 in this embodiment is high still adjustable, set up hydraulic stem 6 in the lower part of mount pad 36, the mount pad 36 sets up the perforation, perforation limit portion rotation is provided with spacing sleeve 63, spacing groove 62 is radially seted up to spacing sleeve 63 inner wall, the outside radial fixed limiting plate 61 of installation pipe 31, spacing plate 61 is arranged in spacing groove 62, hydraulic shaft and the installation pipe 31 bottom of hydraulic stem 6 rotate to be connected, and still fixed mounting has second gear 375 on the installation pipe 31 body, second bending die 54, the interval between second gear 375 and the third gear 373 is the same with the interval between first bending die 34 and the second bending die 54, in addition, be fixed with the outer wall radial mounting plate 51 on the installation pipe 31 of second bending die 54 lower extreme, and be fixed with second cylinder 52 on the second mounting plate 51, be connected with compact heap 53 on the telescopic link of second cylinder 52.

When the device is used, the hydraulic rod 6 is started to drive the mounting pipe 31 to move up and down, then the first bending die 34 and the second bending die 54 are switched to be used, meanwhile, the second gear and the third gear 373 are matched to be meshed with the first gear 374, the second bending die 54 is triangular and the first bending die 34 is arc-shaped in the embodiment, the device can bend the brake pipe 4 into different shapes, and the versatility of the device is enhanced.

Looking at fig. 1 and 6, the workpiece limiting section 2 in the present embodiment includes a first fixing plate 22, a first slider 21, and a positioning groove plate 23; the first sliding seat 21 is arranged on one side of the mounting seat 36, two first sliding rails 24 are arranged at the edge of the first sliding seat 21 in parallel, a first sliding block 241 is arranged at the bottom of the first fixed plate 22, the first sliding block 241 is slidably arranged on the first sliding rail 24, a screw rod 25 is rotatably arranged in the first sliding seat 21, and the screw rod 25 is in threaded fit with a first nut (shown in the figure) arranged at the bottom of the first fixed plate 22; the outer wall of the first sliding seat 21 is fixed with a first motor 29, the first motor 29 drives the screw rod 25 to rotate, a second sliding seat 28 is welded on the first fixing plate 22, a dovetail groove 261 is arranged on the side wall of the second sliding seat 28, a dovetail block 26 is fixed on the positioning groove plate 23, and a spring 27 is connected between the positioning groove plate 23 and the second sliding seat 28.

When the brake pipe 4 is used, taking the first bending die 34 as an example, the brake pipe 4 is placed between the first bending die 34 and the pressing piece 35, the first cylinder 352 is started to fix the brake pipe 4 on the first bending die 34, the first motor 29 is driven to drive the positioning groove plate 23 to abut against the brake pipe 4, the driving motor 371 on the pipe bending part 3 drives the first bending die 34 to rotate, the brake pipe 4 is bent in the process, meanwhile, the brake pipe 4 moves towards the pipe bending part 3, the positioning groove plate 23 moves synchronously along with the brake pipe 4, the phenomenon of scraping and rubbing of the brake pipe 4 and the positioning groove plate 23 is prevented, and after the positioning groove plate 23 is far away from the brake pipe 4, the positioning groove plate 23 can be automatically reset under the deformation of the spring 27 to prepare for the next operation.

Looking at fig. 1 and 7, the pipe conveying part 1 in this embodiment includes a workbench 11, a pair of second slide rails 12 are installed on the workbench 11 in parallel, a second fixing plate 15 is installed on the two second slide rails 12 in a sliding manner (the sliding manner is the same as that of the first fixing plate 22, and is briefly described here), a position shifter 14 and a third air cylinder 13 are arranged on the second fixing plate 15, a telescopic rod of the third air cylinder 13 is fixedly connected with the position shifter 14, a sink groove can be arranged on the second fixing plate 15 in actual production, the position shifter 14 moves along the trend of the sink groove, the number of the third air cylinders 13 is increased if necessary, the stability of the position shifter 14 is ensured, a rack 17 is welded at the edge of the workbench 11, a servo motor 16 is fixed on the second fixing plate 15, and a fourth gear (not shown in the figure) is fixed at one end of an output shaft of the servo motor 16 penetrating out of the second fixing plate 15, and the fourth gear is meshed with the rack 17;

the side of the workbench 11, which is close to the pipe fitting limiting part 2, is fixedly provided with a receiving roller 18 through a bracket, the side edge of the workbench 11 is also provided with a material temporary storage area 19, a plurality of brake pipes 4 can be reserved and placed in the temporary storage area, the temporary storage area is convenient to take, the temporary storage area can also be designed into a slope surface, the side edge of the workbench 11 is inclined and is welded with a plurality of angle steels in parallel, the side wall of the workbench 11 is fixedly provided with a baffle cylinder, and the brake pipes 4 are released at intervals through the baffle cylinder, so that the automation degree of the device is enhanced; in production, the positioning groove plate 23, the pressing piece 35 and the pressing block 53 are provided with arc-shaped openings matched with the surface of the brake pipe 4.

The specific application is as follows:

1) One end of the brake pipe 4 is manually arranged on the position shifter 14, the other end of the brake pipe is placed on the receiving roller 18, and the servo motor 16 drives the position shifter 14 to move towards the pipe bending part 3 and contact with the first bending die 34;

2) Starting the first cylinder 352 to drive the compressing piece 35 to compress the brake pipe 4 at the first bending die 34, and starting the first motor 29 to drive the positioning groove plate 23 to abut against the brake pipe 4;

3) The driving motor 371 drives the first bending die 34 to rotate to bend the brake pipe 4, and the positioning groove plate 23 and the brake pipe 4 synchronously move to limit the brake pipe 4 in the process;

4) The driving and adjusting motor 335 drives each arc piece 32 to move towards the mounting pipe 31, at this time, the first bending die 34 with different sizes is replaced to perform operation, and the third cylinder 13 is used for matching the position of the moving positioner 14, so that the device can be used normally;

5) When the second bending die 54 is needed, the hydraulic rod 6 is started to drive the mounting tube 31 to ascend until the second bending die 54 reaches the operation position, and the steps 1-3 are repeated when the bending operation is performed, wherein the second cylinder 52 is used for driving the compressing block 53 to compress in the step 2.

It will be appreciated by those skilled in the art that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the application or the range of equivalents thereto are intended to be embraced therein.

Claims

1. The brake pipe bending device is characterized by comprising a mounting seat (36), wherein the mounting seat (36) is provided with a rotatable mounting pipe (31), at least three arc-shaped sheets (32) are radially and movably mounted on the outer wall of the mounting pipe (31), each arc-shaped sheet (32) is provided with a first position radially close to the mounting pipe (31) and a second position radially far away from the mounting pipe (31), an adjusting component (33) is movably mounted in the mounting pipe (31), and the adjusting component (33) is acted to enable the arc-shaped sheets (32) to switch between the first position and the second position, and the outer wall of each arc-shaped sheet (32) is abutted with a first bending die (34);

the outer wall of the mounting pipe (31) is provided with a pressing piece (35) capable of radially moving, the pressing piece (35) is movably abutted to the first bending die (34), one side of the mounting pipe (31) is provided with a pipe fitting limiting part, and the pipe fitting limiting part is used for limiting and abutting against the brake pipe (4).

2. Brake pipe line bending apparatus according to claim 1, wherein the adjustment assembly (33) comprises a pair of driving blocks (333) axially movably mounted in the cavity of the mounting pipe (31), and the mounting pipe (31) is rotatably provided with a bi-directional screw (334), two ends of the bi-directional screw (334) are in threaded engagement with the corresponding driving blocks (333), at least three mounting openings are radially provided in the pipe body of the mounting pipe (31), and a cross structure (38) is rotatably connected between the side walls of each mounting opening, one side of the cross structure (38) is movably connected with the corresponding driving block (333), the other side is movably connected with the arcuate segment (32), and the cross angle of the cross structure (38) is changed to increase or decrease the distance between the arcuate segment (32) and the mounting pipe (31).

3. The brake pipe bending apparatus according to claim 2, wherein the cross structure (38) includes a first link (381) and a second link (382) pivotally connected at a central portion thereof and pivotally connected between the mounting port sidewalls;

the arc piece (32) and the drive block (333) are oppositely upwards provided with a plurality of arc grooves (39), one end of a first connecting rod (381) is movably installed on the upper portion of the arc groove (39) on the outer wall of the drive block (333), the other end of the first connecting rod penetrates out of the arc groove (39) on the lower end of the arc piece (32), one end of a second connecting rod (382) is movably installed on the lower portion of the arc groove (39) on the outer wall of the drive block (333), and the other end of the second connecting rod penetrates out of the arc groove (39) on the upper end of the arc piece (32).

4. The brake pipe line bending apparatus according to claim 1, wherein a first mounting plate (351) is radially mounted on the outer wall of the mounting pipe (31), a first cylinder (352) is fixed to the first mounting plate (351), and the compression member (35) is fixedly connected to a telescopic rod of the first cylinder (352).

5. Brake pipe line bending apparatus according to claim 1, characterized in that the mounting pipe (31) is height-adjustable; the installation seat (36) is hollow, a limit sleeve (63) is rotatably arranged at the top of the installation seat (36), and the installation pipe (31) movably penetrates through the limit sleeve (63) and is rotatably connected with a hydraulic shaft of a hydraulic rod (6) at the bottom of the installation seat (36).

6. The brake pipe bending device according to claim 1, wherein a second bending die (54) and a second mounting plate (51) are further fixed on the pipe body of the mounting pipe (31), a second air cylinder (52) is fixed on the second mounting plate (51), a compression block (53) is fixed on a telescopic rod of the second air cylinder (52), and the compression block (53) acts on the second bending die (54) in a movable mode.

7. The brake pipe bending apparatus according to any one of claims 6, wherein a first gear (374) and a second gear (375) are fixedly installed on a pipe body of the installation pipe (31) below the second bending die (54) at intervals, a driving motor (371) is fixed on the installation base (36) through a motor installation plate, a speed reducer (372) is connected to an output shaft of the driving motor (371), a third gear (373) is installed on the speed reducer (372) through a rotating shaft, the hydraulic rod (6) stretches and contracts, and the third gear (373) intermittently engages with the first gear (374) or the second gear (375).

8. The brake pipe bending device according to claim 1, wherein the pipe limiting portion comprises a first sliding seat (21) arranged on one side of a mounting seat (36), a first fixing plate (22) is slidably mounted on the first sliding seat (21), a positioning groove plate (23) is slidably mounted on the first fixing plate (22) in a restrained manner, the sliding direction of the positioning groove plate (23) is perpendicular to the sliding direction of the first fixing plate (22), a screw rod (25) is rotatably arranged between the middle portions of the first sliding seat (21), a first nut is fixed on one side of the first fixing plate (22) facing the screw rod (25), the first nut is in threaded fit with the screw rod (25), the screw rod (25) rotates, and the first fixing plate (22) linearly moves.

9. The brake pipe bending apparatus according to claim 8, further comprising a pipe conveying section (1), the conveying section comprising a table (11), the table (11) being arranged on a side of the pipe limiting section remote from the mounting base (36), the table (11) being slidably mounted with a displacer (14), the displacer (14) being driven by a servo motor (16), and a receiving roller (18) being mounted on a side of the table (11) adjacent to the pipe limiting section.

10. Brake pipe bending apparatus according to claim 9, wherein the table (11) is further provided with a material buffer (19) at the side.