Finished product hoisting device for large-diameter bar rolling line

Abstract

The invention relates to a finished product hoisting device for a large-diameter bar rolling line, which comprises a steel hanger rail erected above a roller way, a transfer crane is movably arranged on the steel hanger rail, a winding plant is arranged on the transfer crane, and the winding plant is provided with a special hook for hoisting a large-diameter bar; the two transfer cranes are arranged on the steel hanger rail and correspond to the two ends of a hoisted large-diameter bar respectively, a follow-up stable trolley is further movably arranged at the position, opposite to the position between the two transfer cranes, of the steel hanger rail, and follow-up pull ropes are tied between the follow-up stable trolley and the two transfer cranes. A pull pipe and a top pipe which are distributed in an inverted V shape are hinged to the bottom of the follow-up stable trolley, the bottom end of the pull pipe is communicated with a rubber suction cup used for tightly sucking the outer surface of the large-diameter bar, a top used for supporting the outer surface of the large-diameter bar is arranged at the bottom end of the top pipe, and the follow-up stable trolley is internally through and communicated with the top end of the pull pipe and the top end of the top pipe through hoses. The conveying device has the advantages of equipment failure rate reduction, convenience in maintenance, high conveying efficiency, low energy consumption and the like.

Description

Technical Field

[0001] The present application relates to the field of metal bar processing, and in particular to a finished product hoisting device for a large-diameter bar rolling line. Background Art

[0002] Bar rolling is a metalworking method used to produce bars of various specifications and shapes. In this process, the metal billet is gradually changed in shape and size by the rotation and pressure of a series of rollers, and finally becomes a bar of the required specifications.

[0003] At present, large-diameter bars are usually transported to the predetermined position by rollers after being rolled into finished products, and then a lifting trolley is used to carry the material horizontally into the finishing area. However, this transfer method has problems such as high equipment failure rate, great maintenance difficulty, low production efficiency, and high energy consumption. Summary of the invention

[0004] In order to improve the problems of high failure rate, great maintenance difficulty, low production efficiency, etc. in the existing large-diameter bar transfer method, the present application provides a finished product hoisting device for a large-diameter bar rolling line.

[0005] The present application provides a finished product hoisting device for a large-diameter bar rolling line, which adopts the following technical solution: A finished product hoisting device for a large-diameter bar rolling line comprises a steel hoisting rail erected above a roller table, a transfer crane is movably arranged on the steel hoisting rail, a hoisting device is arranged on the transfer crane, and the hoisting device is equipped with a special hook for hoisting large-diameter bars.

[0006] By adopting the above technical solution, when the large-diameter bar moves to the designated position on the roller, the hoisting device is started, the special hook is lowered and hooked on the large-diameter bar, and then the hoisting device hoists the large-diameter bar to a high place. As the rotating crane moves on the steel hanging rail, the large-diameter bar is transported to the predetermined position, and finally the hoisting device puts the large-diameter bar down. The present application realizes the transportation of large-diameter bars through the above structure, which not only has a low failure rate and is easy to maintain, but also helps to improve production efficiency and reduce production energy consumption.

[0007] Optionally, two transfer cranes are arranged on the steel hanging rail and correspond to the two ends of the large-diameter rods for lifting respectively. A follow-up stabilizer car is also movably arranged on the steel hanging rail at a position relative to the two transfer cranes, and a follow-up pull rope is tied between the follow-up stabilizer car and the two transfer cranes; the bottom of the follow-up stabilizer car is hinged with a pull tube and a push tube distributed in an inverted V shape, the bottom end of the pull tube is connected with a rubber suction cup for sucking the outer surface of the large-diameter rod, and the bottom end of the push tube is arranged with a head for supporting the outer surface of the large-diameter rod. The interior of the follow-up stabilizer car is through and connected with the top ends of the pull tube and the push tube through a hose respectively, and a motor electrically connected to the control system is arranged on the side of the follow-up stabilizer car opposite to the pull tube, and the output shaft of the motor is coaxially arranged with a screw rod rotatably penetrated in the follow-up stabilizer car, and the screw rod is threadedly connected with a partition slide for separating the inner cavity of the follow-up stabilizer car.

[0008] By adopting the above technical solution, when the ram and the rubber suction cup are both in close contact with the outer wall of the large-diameter bar, the control system starts the motor, the output shaft of the motor drives the screw to rotate, and the separating slide moves in the follow-up stabilizer under the action of the thread on the screw. In this process, a negative pressure is formed in the part where the inner cavity of the follow-up stabilizer communicates with the pull pipe, so that the rubber suction cup can tightly adsorb the outer wall of the large-diameter bar; in addition, under the support of the top pipe, the ram always presses against the outer wall of the large-diameter bar by friction. When the transfer crane lifts the large-diameter bar, the follow-up stabilizer moves synchronously with the transfer crane under the pulling action of the follow-up pull rope. When the transfer crane stops suddenly, the follow-up stabilizer can stop quickly and synchronously under the pulling action of the two follow-up pull ropes. The negative pressure pulling action of the pull pipe on the large-diameter bar and the top support action of the top pipe cooperate to achieve the braking of the large-diameter bar, which is conducive to reducing the possibility of the large-diameter bar continuing to rush forward under the action of inertia and causing safety accidents.

[0009] Optionally, the partition slide is coated with polytetrafluoroethylene.

[0010] By adopting the above technical solution, the friction coefficient of polytetrafluoroethylene is relatively small, so it is beneficial to improve the smoothness of the separation slide when it moves in the follow-up stable vehicle.

[0011] Optionally, sensing blocks are arranged on both sides of the follow-up stabilizer car through which the lead screw rotates, and a proximity switch electrically connected to the control system and used to sense the two sensing blocks is arranged on the separating slide plate.

[0012] By adopting the above technical solution, the induction block and the proximity switch cooperate with each other, so that the moving range of the partition slide in the follow-up stable vehicle can be limited.

[0013] Optionally, there is a distance between the connection point between the hose where the pull tube is located and the follow-up stabilizer car and the side wall where the motor is located, and a top support slide is slidably arranged on the side of the follow-up stabilizer car opposite to the motor, and an elastic airbag is connected to the side of the follow-up stabilizer car opposite to the motor, and the elastic airbag is supported between the outer wall of the follow-up stabilizer car and the top support slide. A first pull wire is tied to the top of the follow-up stabilizer car, the first pull wire passes around the top support slide and is tied to the pull tube, and a second pull wire is tied to the top support slide, and the second pull wire passes around the top of the follow-up stabilizer car and is tied to the top tube.

[0014] By adopting the above technical solution, the control system starts the motor, and the screw drives the partition slide to move in the direction close to the motor. Part of the air in the follow-up stabilizer car will be squeezed into the elastic airbag, the elastic airbag will expand and push the support slide to move, and the support slide will apply force to the first pull wire and the second pull wire, so that the first pull wire pulls the pull tube and the second pull wire pulls the top tube to rotate, so that the rubber suction cup and the top head are separated from the contact with the large-diameter rod, thereby facilitating the loading and unloading of the large-diameter rod transportation.

[0015] Optionally, a plurality of pull tubes are hinged on the follow-up stabilizer car, and the pull tubes are arranged in a row along the width direction of the hose at the connection point between the hose and the follow-up stabilizer car.

[0016] By adopting the above technical solution, multiple pulling tubes apply pulling force to the large-diameter rod at the same time, which is beneficial to improving the braking effect on the large-diameter rod.

[0017] Optionally, a push rod is vertically slidably arranged on the follow-up stabilizing vehicle, and the bottom end of the push rod is supported on the top pipe. A fixed block and a slidably arranged limit slider are fixedly provided on the top of the follow-up stabilizing vehicle. A compression spring is supported between the limit slider and the fixed block. A linkage pull wire is tied to the limit slider, and the linkage pull wire passes through the fixed block and is tied to the support slide plate. When the top head supports the outer wall of the large-diameter pipe, the limit slider slides to the top of the push rod.

[0018] By adopting the above technical solution, when the push head hits the outer wall of the large-diameter rod, the compression spring can push the limit slider to cover the top of the push rod, thereby improving the firmness of the push pipe supporting the large-diameter rod and further reducing the possibility of the large-diameter rod continuing to advance due to inertia.

[0019] Optionally, the cross section of the push rod is square and is slidably arranged on the follow-up stabilizer vehicle.

[0020] By adopting the above technical solution, the cross-section direction limits the circumferential rotation of the push rod, thereby ensuring the supporting effect between the bottom end of the push rod and the push pipe.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the large-diameter bar moves to the designated position on the roller, the hoisting device starts, lowers the special hook and hooks it on the large-diameter bar, and then the hoisting device hoists the large-diameter bar to a high place. As the rotating crane moves on the steel hanging rail, the large-diameter bar is transported to the predetermined position, and finally the hoisting device puts the large-diameter bar down. The present application realizes the transportation of large-diameter bars through the above structure, which not only has a low failure rate and is easy to maintain, but also helps to improve production efficiency and reduce production energy consumption. ; 2. When the ram and the rubber suction cup are both in close contact with the outer wall of the large-diameter bar, the control system starts the motor, and the output shaft of the motor drives the screw to rotate. The separating slide moves in the follow-up stabilizer car under the action of the thread on the screw. During this process, a negative pressure is formed in the part where the inner cavity of the follow-up stabilizer car communicates with the pull tube, so that the rubber suction cup can tightly adsorb the outer wall of the large-diameter bar; in addition, under the support of the jacking tube, the ram always presses against the outer wall of the large-diameter bar by friction. When the transfer crane lifts the large-diameter bar, the follow-up stabilizer car moves synchronously with the transfer crane under the pulling action of the follow-up pull rope. When the transfer crane stops suddenly, the follow-up stabilizer car can stop quickly and synchronously under the coordinated pulling action of the two follow-up pull ropes. The negative pressure pulling action of the pull tube on the large-diameter bar and the supporting action of the jacking tube cooperate to achieve the braking of the large-diameter bar, which is conducive to reducing the possibility of the large-diameter bar continuing to rush forward under the action of inertia and causing safety accidents; 3. The control system starts the motor, and the screw drives the partition slide to move towards the motor. Part of the air in the follow-up stabilizer car will be squeezed into the elastic airbag. The elastic airbag expands and pushes the support slide to move. The support slide exerts force on the first pull wire and the second pull wire, so that the first pull wire pulls the pull tube and the second pull wire pulls the top tube to rotate, so that the rubber suction cup and the top head are out of contact with the large-diameter rod, thereby facilitating the loading and unloading of large-diameter rod transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0023] Figure 2 It is a cross-sectional view showing the positional relationship among the motor, the lead screw and the partition slide in the embodiment of the present application.

[0024] Figure 3 It is a schematic diagram of the positional relationship between the first pull wire, the top support slide plate and the pull tube in the embodiment of the present application.

[0025] Figure 4 It is a schematic diagram of the positional relationship between the second pull wire, the limit slider and the compression spring in the embodiment of the present application.

[0026] Explanation of the reference numerals: 1. Steel hanging rail; 2. Transfer crane; 3. Special hook; 4. Large-diameter rod; 5. Follow-up stabilizer; 6. Follow-up pull rope; 7. Pull pipe; 8. Push pipe; 9. Rubber suction cup; 24. Push head; 10. Motor; 11. Screw rod; 12. Separation slide plate; 13. Induction block; 14. Proximity switch; 15. Push-support slide plate; 16. Elastic airbag; 17. First pull wire; 18. Second pull wire; 19. Push rod; 20. Fixed block; 21. Limit slider; 22. Compression spring; 23. Linkage pull wire. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 This application is described in further detail.

[0028] The embodiment of the present application discloses a finished product hoisting device for a large-diameter bar rolling line.

[0029] Reference Figure 1 The finished product lifting device for the large-diameter bar rolling line includes a steel hanging rail 1 erected above the roller table, and two transfer cranes 2 are movably arranged on the steel hanging rail 1. One end of the large-diameter bar 4 corresponds to a transfer crane 2, and the transfer crane 2 adopts an electric intelligent trolley in the existing technology.

[0030] Reference Figure 1 The transfer crane 2 is equipped with a hoisting device, and the hoisting device is equipped with a special hook 3 for hoisting large-diameter bars 4. The hoisting device and the special hook 3 are directly adopted from the existing technology.

[0031] Reference Figure 1 and Figure 2 A follow-up stabilizer car 5 is also movably arranged on the steel hanging rail 1. The follow-up stabilizer car 5 is located between the two transfer cranes 2. Follow-up pull ropes 6 are tied between the follow-up stabilizer car 5 and the two transfer cranes 2. The follow-up stabilizer car 5 does not have power itself and is moved by being dragged by the transfer crane 2 through the follow-up pull ropes 6.

[0032] Reference Figure 2 and Figure 3 The bottom of the follow-up stabilizer car 5 is hinged with a pull tube 7 and a push tube 8, which are arranged in an inverted V shape. The bottom end of the pull tube 7 is connected to a rubber suction cup 9 for sucking the outer wall of the large-diameter rod 4, and the bottom end of the push tube 8 is welded with a top head 24 for supporting the outer wall of the large-diameter rod 4.

[0033] Reference Figure 2 and Figure 3 The interior of the follow-up stabilizer 5 is hollow, and the top ends of the top pipe 8 and the pull pipe 7 are connected to the inner cavity of the follow-up stabilizer 5 through a hose. A plurality of pull pipes 7 are hinged at the bottom of the follow-up stabilizer 5, and the connection between the hose and the follow-up stabilizer 5 is arranged in a row along the width direction thereof.

[0034] Reference Figure 2 and Figure 3 A motor 10 electrically connected to the control system is bolted to one side of the follow-up stabilizer 5 opposite to the pull tube 7. The motor 10 adopts a forward and reverse servo motor in the prior art. The output shaft of the motor 10 is coaxially connected to a screw rod 11 rotatably arranged in the follow-up stabilizer 5 through a coupling. A partition slide 12 for partitioning the inner cavity of the follow-up stabilizer 5 is threadedly connected to the screw rod 11. The partition slide 12 is coated with polytetrafluoroethylene.

[0035] Reference Figure 2 and Figure 3 When the top head 24 and the rubber suction cup 9 are close to the outer wall of the large-diameter rod 4, the control system starts the motor 10, the output shaft of the motor 10 drives the screw rod 11 to rotate, and the partition slide plate 12 slides in the driven download follower stabilizer car 5 on the thread of the screw rod 11.

[0036] The separating slide plate 12 slides over the connection between the hose where the pull tube 7 is located and the follow-up stabilizer 5, and gradually approaches the connection between the hose where the top tube 8 is located and the follow-up stabilizer 5. During this process, negative pressure is formed in the pull tube 7, so that the rubber suction cup 9 applies a certain pulling force to the large-diameter rod 4.

[0037] When the transfer crane 2 delivers the large-diameter bar 4 to the designated position and stops suddenly, the follow-up stabilizer 5 stops suddenly under the mutual pulling action of the two follow-up pull ropes 6. At this time, the supporting action of the jacking pipe 8 on the bar and the pulling action of the pull pipe 7 on the bar can achieve the emergency stop of the large-diameter bar 4, reducing the possibility of the large-diameter bar 4 continuing to rush forward due to inertia and causing a safety accident.

[0038] After the large-diameter rod 4 is stabilized, the control system controls the output shaft of the motor 10 to reverse, and the separating slide plate 12 slides in the opposite direction until it slides over the connecting point between the drawing tube 7 and the follow-up stabilizing vehicle 5 again, and the pressure in the drawing tube 7 returns to normal, and the rubber suction cup 9 releases the adsorption effect on the large-diameter plate.

[0039] Reference Figure 2 and Figure 3 On both sides of the follow-up stabilizer car 5, the screw rod 11 is rotated and penetrated with sensing blocks 13, and the separation slide 12 is arranged with a proximity switch 14 electrically connected to the control system. The proximity switch 14 cooperates with the two sensing blocks 13 to limit the moving range of the separation slide 12.

[0040] Reference Figure 2 and Figure 3 There is a gap between the connection point between the hose where the pull tube 7 is located and the follow-up stabilizer car 5 and the side wall where the motor 10 is located, and a supporting slide plate 15 is slidably arranged on one side of the follow-up stabilizer car 5 relative to the motor 10.

[0041] A ring-shaped elastic airbag 16 is connected to the side of the follow-up stabilizer car 5 opposite to the motor 10, and the elastic airbag 16 is supported between the outer wall of the follow-up stabilizer car 5 and the supporting slide plate 15. A first pull wire 17 is tied to the top of the follow-up stabilizer car 5, and the first pull wire 17 passes through the supporting slide plate 15 and is tied to the pull tube 7; a second pull wire 18 is tied to the supporting slide plate 15, and the second pull wire 18 passes through the top of the follow-up stabilizer car 5 and is tied to the top tube 8.

[0042] Reference Figure 2 and Figure 3 The control system starts the motor 10, and the output shaft of the motor 10 drives the screw rod 11 to rotate. The separating slide plate 12 gradually approaches the motor 10 under the action of the thread on the screw rod 11, and part of the air in the follow-up stabilizer car 5 is squeezed into the elastic airbag 16.

[0043] The elastic airbag 16 expands, thereby pushing the supporting slide plate 15 to slide a small amount, and the supporting slide plate 15 applies force to the first pull wire 17 and the second pull wire 18. The first pull wire 17 pulls the pull tube 7, and the second pull wire 18 pulls the top tube 8 to turn upward through a certain angle, so that the rubber suction cup 9 and the top head 24 are both out of contact with the large-diameter rod 4, thereby facilitating the loading and unloading of the large-diameter rod 4 during transportation.

[0044] Reference Figure 2 , Figure 3 and Figure 4 A square-sectioned top rod 19 is vertically slidably provided on the follow-up stabilizer 5, and the bottom end of the top rod 19 is supported on the top pipe 8. A fixed block 20 is welded on the top of the follow-up stabilizer 5, and a limit slider 21 is slidably arranged. A compression spring 22 is supported between the limit slider 21 and the fixed block 20. A linkage wire 23 is tied to the limit slider 21, and the linkage wire 23 passes through the fixed block 20 and is tied to the top supporting slide plate 15.

[0045] When the elastic airbag 16 is in a collision state, the limit slider 21 is misaligned with the push rod 19, and the compression spring 22 is in a compressed state. When the mandrel 24 contacts the large-diameter bar 4, the push rod 19 first slides downward, and then the limit slider 21 moves to the top of the push rod 19 under the push of the compression spring 22, thereby locking the push rod 19 against the push tube 8.

[0046] Reference Figure 2 , Figure 3 and Figure 4 On the contrary, when the elastic airbag 16 expands again, the linkage pull wire 23 first pulls the limit slider 21 away from the top of the push rod 19, and then the second pull wire 18 pulls the push pipe 8 to rotate, and the push rod 19 moves upward under the support of the push pipe 8.

[0047] The implementation principle of a finished product hoisting device for a large-diameter bar rolling line in the embodiment of the present application is as follows: When the large-diameter rod 4 moves to the designated position on the roller table, the hoisting device is started, the special hook 3 is lowered and hooked on the large-diameter rod 4, and then the hoisting device lifts the large-diameter rod 4 to a high place.

[0048] The control system starts the motor 10 , and the output shaft of the motor 10 drives the screw rod 11 to rotate, and the partition slide plate 12 slides under the action of the thread on the screw rod 11 .

[0049] The supporting slide plate 15 first approaches the outer wall of the follow-up stabilizer car 5, and the push rod 19 first slides downward, and then the limit slider 21 moves to the top of the push rod 19 under the push of the compression spring 22, and the rubber suction cup 9 at the bottom of the pull tube 7 and the push head 24 at the bottom of the push tube 8 are supported on the outer wall of the large-diameter rod 4.

[0050] After that, the separating slide plate 12 slides over the connection between the hose where the pull tube 7 is located and the follow-up stabilizer 5, and gradually approaches the connection between the hose where the top tube 8 is located and the follow-up stabilizer 5. In this process, negative pressure is formed in the pull tube 7, so that the rubber suction cup 9 applies a certain pulling force to the large-diameter rod 4.

[0051] When the transfer crane 2 lifts the large-diameter bar 4, the follow-up stabilizer 5 moves synchronously with the transfer crane 2 under the pulling action of the follow-up pull rope 6. When the transfer crane 2 stops suddenly after delivering the large-diameter bar 4 to the designated position, the follow-up stabilizer 5 stops suddenly under the mutual pulling action of the two follow-up pull ropes 6. At this time, the supporting action of the jacking pipe 8 on the bar and the pulling action of the pull pipe 7 on the bar realize the braking of the large-diameter bar 4, reducing the possibility of the large-diameter bar 4 continuing to rush forward under the action of inertia and causing a safety accident.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A finished product hoisting device for a large-diameter bar rolling line, characterized in that: The invention comprises a steel hanging rail (1) erected above a roller conveyor, a transfer crane (2) movably arranged on the steel hanging rail (1), a hoisting device arranged on the transfer crane (2), and a special hook (3) for hoisting large-diameter bars (4).

2. The finished product hoisting device for a large-diameter bar rolling line according to claim 1 is characterized in that: Two transfer cranes (2) are arranged on the steel hanging rail (1) and correspond to the two ends of the large-diameter bar (4) for hoisting respectively. A follow-up stabilizer (5) is also movably arranged on the steel hanging rail (1) at a position between the two transfer cranes (2). Follow-up pull ropes (6) are tied between the follow-up stabilizer (5) and the two transfer cranes (2). The bottom of the follow-up stabilizer (5) is hinged with a pull tube (7) and a push tube (8) arranged in an inverted V shape. The bottom end of the pull tube (7) is connected to a rubber suction cup (9) for sucking the outer surface of the large-diameter rod (4). The bottom end of the push tube (8) is arranged with a head (24) for supporting the outer surface of the large-diameter rod (4). The interior of the follow-up stabilizer (5) is through and connected to the top of the pull tube (7) and the push tube (8) respectively through a hose. The side of the follow-up stabilizer (5) opposite to the pull tube (7) is arranged with a motor (10) electrically connected to the control system. The output shaft of the motor (10) is coaxially arranged with a screw rod (11) rotatably inserted into the follow-up stabilizer (5). The screw rod (11) is threadedly connected to a partition slide (12) for separating the inner cavity of the follow-up stabilizer (5).

3. The finished product hoisting device for a large-diameter bar rolling line according to claim 2, characterized in that: The partition slide plate (12) is coated with polytetrafluoroethylene.

4. The finished product hoisting device for a large-diameter bar rolling line according to claim 2, characterized in that: Both sides of the follow-up stabilizer (5) through which the lead screw (11) rotates are provided with sensing blocks (13), and the separation slide plate (12) is provided with a proximity switch (14) electrically connected to the control system and used for sensing the two sensing blocks (13).

5. The finished product hoisting device for a large-diameter bar rolling line according to claim 2, characterized in that: There is a distance between the connection point between the hose where the pull tube (7) is located and the follow-up stabilizer car (5) and the side wall where the motor (10) is located. A support slide plate (15) is slidably arranged on the side of the follow-up stabilizer car (5) relative to the motor (10). An elastic air bag (16) is connected to the side of the follow-up stabilizer car (5) relative to the motor (10). The elastic air bag (16) is supported between the outer wall of the follow-up stabilizer car (5) and the support slide plate (15). A first pull wire (17) is tied to the top of the follow-up stabilizer car (5). The first pull wire (17) passes through the support slide plate (15) and is tied to the pull tube (7). A second pull wire (18) is tied to the support slide plate (15). The second pull wire (18) passes through the top of the follow-up stabilizer car (5) and is tied to the top tube (8).

6. The finished product hoisting device for a large-diameter bar rolling line according to claim 2, characterized in that: A plurality of the pull tubes (7) are hingedly connected to the follow-up stabilizer vehicle (5), and the connecting parts of the hose where the pull tubes (7) are located and the follow-up stabilizer vehicle (5) are arranged in a row along the width direction thereof.

7. The finished product hoisting device for a large-diameter bar rolling line according to claim 5, characterized in that: A push rod (19) is vertically slidably arranged on the follow-up stabilizer (5), and the bottom end of the push rod (19) is supported on the top pipe (8). A fixed block (20) and a slidably arranged limit slider (21) are fixedly arranged on the top of the follow-up stabilizer (5). A compression spring (22) is supported between the limit slider (21) and the fixed block (20). A linkage pull wire (23) is tied to the limit slider (21), and the linkage pull wire (23) passes through the fixed block (20) and is tied to the support slide plate (15). When the top head (24) supports the outer wall of the large-diameter pipe, the limit slider (21) slides to the top of the push rod (19).

8. The finished product hoisting device for a large-diameter bar rolling line according to claim 7, characterized in that: The top rod (19) has a square cross section and is slidably arranged on the follow-up stabilizer vehicle (5).

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