Quick replacement device for core rod support frame

Abstract

The utility model relates to a quick replacement device for a core rod support frame, which comprises a roll replacement transverse moving structure, a roll replacement transverse moving structure and a roll replacement transverse moving structure, wherein the roll replacement transverse moving structure comprises a first roll replacement transverse moving vehicle and a second roll replacement transverse moving vehicle; the rack pulling-out and pushing-in device is used for pulling out or pushing the core rod supporting frame into a rail in the rolling mill and is arranged on one side, far away from a rolling center of the rolling mill, of the first roll changing transverse moving vehicle or / and the second roll changing transverse moving vehicle; and the transition rack structure and the roller rack are arranged in a staggered mode in the axial direction of the roller, and the rack pull-out and push-in device drives the core rod supporting frame to move along the roller changing transverse moving structure, the transition rack structure and the rolling mill inner rail. The utility model solves the problem that the mandrel support frame can not be quickly replaced, the preparatory work required by the replacement of the mandrel support frame can be carried out during the working period of the rolling mill, the replacement of the mandrel support frame can be completed during the replacement period of the roller rack, the rack replacement time is shortened, the downtime of the rolling mill is reduced, and the production efficiency is improved. And the rack replacement efficiency and the production efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot-rolled seamless steel pipe production, in particular to a mandrel support frame quick replacement device. Background Art

[0002] In the field of hot-rolled seamless steel pipe production, the three-roll continuous rolling mill represents the most advanced technology in modern hot-rolled seamless steel pipe production.

[0003] The main body of the three-roll continuous tube mill is mainly composed of an external frame, a roll stand and a mandrel support frame. The roll stand usually has 5 to 6 stands, and the mandrel support frame usually has 3 to 4 stands. The roll stands and the mandrel support frames are arranged alternately. Usually, a mandrel support frame is set at the entrance of the first roll stand and the exit of the last roll stand, a mandrel support frame is set between the second and third roll stands, and a mandrel support frame is set between the fourth and fifth roll stands. The mandrel support frame is a three-roller type (that is, three mandrel support rollers are set on the support frame) mandrel self-centering device with a device for adjusting according to the mandrel specifications. The mandrel support roller is controlled by a hydraulic cylinder, and when no raw tube passes, it holds the mandrel so that the mandrel is on the rolling center line. Before the raw tube is rolled to each stand, the support roller is opened to make the raw tube under the rolling of the roller, and the position of the mandrel is determined on the rolling line by the rolling pass. The structure ensures that the mandrel is at the rolling center line, so that the rolled tube has fewer defects such as uneven wall thickness.

[0004] The roll stand is used for the deformation of the rolled piece, and the mandrel support frame is used for supporting the mandrel. The rolls in the roll stand are deformation tools, which will wear out after long-term operation and need to be replaced regularly; the support rolls in the mandrel support frame will also wear out after long-term operation and need to be checked and replaced regularly. In addition, if the mandrel support frame fails, it also needs to be quickly replaced. The three-roll continuous tube mill has developed three types of machines according to the different types of frame replacement. The first type is an axial roll-changing type three-roll continuous tube mill. When the frame is replaced, all the roll stands and mandrel support frames are pulled out as a whole from the mill outlet. Even if only one frame is replaced, all the frames must be pulled out, which makes frame replacement somewhat inconvenient. The second type is a three-roller continuous tube mill with a single lateral roll change type. When the rack is replaced, all the roll racks and mandrel support racks are pulled out from one side of the mill as a whole, and a single rack can also be replaced. The rack replacement method is more flexible and convenient; but the servo hydraulic cylinder must swing to clear the area where the roll rack moves when the roll is pressed down each time the roll is changed. The structure is complex, the operation is inconvenient, the rack rigidity is poor, and the lower transmission is located below the mill, which is very inconvenient for inspection and maintenance. At present, this type of machine is gradually being replaced by a three-roller continuous tube mill with a double lateral roll change type.

[0005] The three-roller continuous tube mill with double lateral roll change is the third type and the latest type of three-roller continuous tube mill. The roll change device is set on both sides of the rolling center line, with odd-numbered frames on one side and even-numbered frames on the other side. When the frames are replaced, the odd-numbered frames and even-numbered frames are pulled out from the outer frame of the mill to the roll change trolleys on both sides of the rolling center line. Then the roll change trolley moves horizontally and pushes the new roll frame into the outer frame of the mill to complete the frame replacement. The whole frame can be replaced or a single frame can be replaced. This type of machine has the advantages of high mill rigidity, convenient operation and maintenance, and short frame replacement time.

[0006] The replacement of the roll frame of the three-roll continuous tube mill with double lateral roll change is very convenient and flexible, but due to space limitations, the replacement of the mandrel support frame is somewhat inconvenient. When replacing the mandrel support frame, first pull the mandrel support frame to be taken off the line to the roll change trolley outside the rolling center line, then use the workshop crane to lift the mandrel support frame off the line from the roll change trolley, and then use the crane to lift the mandrel support frame to be put on the line onto the roll change trolley, and then pull the mandrel support frame into the rolling center line. The above process must be repeated for each replacement of the mandrel support frame. During this process, the roll change trolley cannot move, and the roll frame replacement operation cannot be performed.

[0007] There are three sets of mandrel support frames for the three-roll continuous tube mill with double lateral roll change in the prior art, which are respectively installed between the 2# and 3# roll frames, between the 4# and 5# frames and at the exit of the last frame. A moving track for the mandrel support frame is arranged on a roll change trolley on both sides of the rolling center line, and a set of wire rope hoisting mechanism is arranged on the outer side of each of the two roll change trolleys, one of which is used to pull the mandrel support frame ready to be unloaded out of the outer frame of the mill (i.e., pull it out of the rolling center line), and the other is used to pull the mandrel support frame ready to be put on the line into the outer frame of the mill (i.e., pull it into the rolling center line). When replacing the mandrel support frame, first hang the wire rope of the hoisting mechanism used for pulling out on the hook of the mandrel support frame on the line, pull the mandrel support frame to the track of the roll-changing trolley through the hoist, and then use the workshop crane to lift the mandrel support frame off the line, and then use the crane to lift the new mandrel support frame to be put on the track of the roll-changing trolley, and then hang the wire rope of the hoisting mechanism used for pulling in on the hook of the mandrel support frame on the line, and pull the mandrel support frame into the outer frame of the rolling mill (that is, pull it into the rolling center line) through the hoist. During the entire mandrel support frame replacement process, the roll-changing trolley cannot move, that is, the mandrel support frame can only be replaced before the roll frame replacement starts or after the roll frame replacement is completed, and the entire mandrel support frame replacement process is completely manually operated. The replacement time is long, the labor intensity is high, and it is both time-consuming and labor-intensive.

[0008] In the prior art, the mandrel support frame is replaced from one side of the rolling mill. Due to space limitations, there is only one mandrel support frame storage track on the roll-changing trolley, and there is no space for the mandrel support frame to be put on the line. The mandrel support frame that has been taken off the line must be pulled out and lifted away by a crane before the new mandrel support frame to be put on the line can be lifted to the mandrel support frame storage track on the roll-changing trolley. Not only does the replacement time of the mandrel support frame itself take a long time, but it cannot be replaced at the same time as the roll frame, resulting in the superposition of the overall frame replacement time.

[0009] Therefore, the present invention, relying on many years of experience and practice in related industries, proposes a mandrel support frame quick replacement device to overcome the defects of the prior art. Utility Model Content

[0010] The purpose of the utility model is to provide a mandrel support frame quick replacement device, which solves the problem that the mandrel support frame cannot be quickly replaced. The relevant preparation work such as frame lifting required for the replacement of the mandrel support frame can be carried out during the operation of the rolling mill, and the replacement of the mandrel support frame can be completed within the time period of the roll frame replacement, thereby shortening the frame replacement time, reducing the rolling mill downtime, and improving the frame replacement efficiency and production efficiency.

[0011] The purpose of the utility model is achieved by providing a mandrel support frame quick replacement device, comprising:

[0012] The roll-changing transverse shifting structure comprises a first roll-changing transverse shifting vehicle and a second roll-changing transverse shifting vehicle arranged on both sides of the rolling center of the rolling mill;

[0013] At least one frame pulling out and pushing in device for pulling out or pushing the mandrel support frame into the track in the rolling mill, arranged on the side of the first roll-changing transverse transfer vehicle and / or the second roll-changing transverse transfer vehicle away from the rolling center of the rolling mill;

[0014] A transition stand structure is extended along the length direction of the inner track of the rolling mill toward the roll changing transverse movement structure. The transition stand structure and the roll frame are staggered along the roll axis. The frame pulling and pushing device drives the mandrel support frame to move along the roll changing transverse movement structure, the transition stand structure and the inner track of the rolling mill.

[0015] In a preferred embodiment of the present invention, the transition platform structure includes a first transition platform arranged between the inner track of the rolling mill and the first roll-changing transverse transfer vehicle, and a second transition platform arranged between the inner track of the rolling mill and the second roll-changing transverse transfer vehicle. The first roll-changing transverse transfer vehicle is provided with a first transverse transfer vehicle track extending along the length direction of the first transition platform, and the second roll-changing transverse transfer vehicle is provided with a second transverse transfer vehicle track extending along the length direction of the second transition platform; the first transverse transfer vehicle track, the first transition platform, the inner track of the rolling mill, the second transition platform and the second transverse transfer vehicle track are arranged in the same line and through each other.

[0016] In a preferred embodiment of the present invention, the frame pulling out and pushing in device comprises a first hook capable of hooking the mandrel support frame, a first push plate capable of being hooked, and a first driving part capable of providing power for the movement of the mandrel support frame.

[0017] In a preferred embodiment of the utility model, it includes a roll-changing auxiliary structure that can be connected between the mandrel support frame to be put on the line and the mandrel support frame to be taken off the line. The roll-changing auxiliary structure assists in cooperating with the frame pulling-out and pushing-in device to drive the mandrel support frame to be put on the line and the mandrel support frame to be taken off the line to move along the roll-changing transverse structure, the transition stand structure and the inner track of the rolling mill.

[0018] In a preferred embodiment of the utility model, auxiliary hook parts that can hook the mandrel support frame and auxiliary push plate parts that can be hooked are arranged on both sides of the roller changing auxiliary structure, and a hook driving structure that can drive the auxiliary hook part to hook the mandrel support frame or release the mandrel support frame is arranged below the transition platform structure.

[0019] In a preferred embodiment of the utility model, the roller changing auxiliary structure includes a vehicle body, the auxiliary hook part includes a second hook and a third hook hinged on both sides of the vehicle body, the auxiliary push plate part includes a second push plate arranged under the second hook and a third push plate arranged under the third hook, and the hook driving structure drives the second hook and the third hook to swing.

[0020] In a preferred embodiment of the present invention, the hook driving structure includes a second driving part, and the second driving part is connected to a roller via a rotating shaft and a connecting rod. The roller can move along the bottom of the vehicle body to abut against the second hook or the third hook to make it swing.

[0021] In a preferred embodiment of the present invention, a guide lining is provided on the bottom surface of the vehicle body, a guide groove is provided on the guide lining, and the roller moves along the guide groove.

[0022] In a preferred embodiment of the present invention, the frame pulling out and pushing in device is arranged on the side of the first roll-changing transverse shifting vehicle away from the rolling center of the rolling mill, the mandrel support frame to be put on line is located on the second roll-changing transverse shifting vehicle, the roll-changing auxiliary structure is located on the second transition stand and its two ends are respectively hooked and connected to the mandrel support frame to be put on line and the mandrel support frame to be taken off line, the frame pulling out and pushing in device is hooked and connected to the mandrel support frame to be taken off line, the first driving part retracts and pulls the mandrel support frame to be taken off line, the roll-changing auxiliary structure and the mandrel support frame to be put on line until the mandrel support frame to be put on line reaches the inner track of the rolling mill, and the mandrel support frame to be taken off line reaches the first roll-changing transverse shifting vehicle;

[0023] or,

[0024] The support frame for the mandrel to be put on the line is located on the first roll-changing transverse shifting vehicle, the frame pulling out and pushing in device is hooked and connected to the support frame for the mandrel to be put on the line, the roll-changing auxiliary structure is located on the first transition platform and its two ends are respectively hooked and connected to the support frame for the mandrel to be put on the line and the support frame for the mandrel to be taken off the line, the first driving part extends out to push the support frame for the mandrel to be taken off the line, the roll-changing auxiliary structure and the support frame for the mandrel to be put on the line until the support frame for the mandrel to be put on the line reaches the inner track of the rolling mill, and the support frame for the mandrel to be taken off the line reaches the second roll-changing transverse shifting vehicle.

[0025] As described above, the mandrel support frame quick replacement device of the utility model has the following beneficial effects:

[0026] The utility model makes full use of the limited space on both sides of the rolling mill and the original roll-changing transverse shifting trolley, solves the problem that the mandrel support frame cannot be quickly replaced, and the path of pushing in and pulling out the mandrel support frame is axially staggered with the roll frame, and the relevant preparation work such as frame lifting required for the replacement of the mandrel support frame can be carried out during the working period of the rolling mill, and the replacement of the mandrel support frame can be completed within the time period of the roll frame replacement, thereby reducing the downtime of the rolling mill and improving the production efficiency;

[0027] The frame pulling out and pushing in device of the utility model pulls out the mandrel support frame to be unloaded and the mandrel support frame to be put on line enters the track inside the rolling mill, so that the unloading of the old mandrel support frame and the putting on of the new mandrel support frame are completed at one time;

[0028] The utility model adopts a roller-changing auxiliary structure to realize a quick connection with the mandrel support frame, and completes the conversion of the mandrel support frame between the upper line and the lower line in one action, and the operation is simple, the mandrel support frame is replaced quickly and the efficiency is high.

[0029] The core rod support frame of the utility model is flexible and convenient to replace and can be replaced individually or simultaneously, with less equipment movement and short replacement time, thus improving the operation time of the rolling mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0031] Figure 1 It is a schematic diagram of a quick replacement device for a mandrel support frame when the roller-changing auxiliary structure of the utility model is on the second transition stand.

[0032] Figure 2 It is a schematic diagram of a quick replacement device for a mandrel support frame when the roller-changing auxiliary structure of the utility model is on the first transition stand.

[0033] Figure 3 It is a top view schematic diagram of the mandrel support frame quick replacement device of the utility model on the rolling mill production line.

[0034] Figure 4 It is a schematic diagram of the roller changing auxiliary structure of the utility model.

[0035] Figure 5 It is a schematic diagram of the roller-changing auxiliary structure of the utility model when it does not abut against the hook of the roller-changing auxiliary structure.

[0036] Figure 6 It is a schematic diagram of the roller-changing auxiliary structure of the utility model when the hook of the roller-changing auxiliary structure is pressed against the roller-changing auxiliary structure to the maximum swing angle.

[0037] In the figure:

[0038] 100. Mandrel support frame quick-change device; 200. Roller stand;

[0039] 1. Frame pulling out and pushing device; 2. First roll-changing transverse transfer vehicle; 3. First transverse transfer vehicle track; 4. First transition stand; 5. Roll-changing auxiliary structure; 6. Second transition stand; 7. Second roll-changing transverse transfer vehicle; 8. Second transverse transfer vehicle track; 9. External frame of rolling mill; 10. Support frame for mandrels to be unloaded; 11. Support frame for mandrels to be loaded; 12. Internal track of rolling mill; 13. First hook; 14. Sixth hook; 15. Seventh hook; 16. Fourth hook; 17. Fifth hook; 18. Car body; 19. Second hook; 20. Third hook; 21. Guide lining; 22. Second push plate; 23. Third push plate; 24. First push plate; 25. Hook driving structure; 26. Connecting rod; 27. Rotating shaft; 28. Roller; 29. ​​Second driving unit. DETAILED DESCRIPTION

[0040] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0041] The specific implementation of the utility model described herein is only used to explain the purpose of the utility model, and cannot be understood as a limitation of the utility model in any way. Under the guidance of the utility model, technicians can conceive of any possible deformation based on the utility model, which should be regarded as belonging to the scope of the utility model. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on the other element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] like Figures 1 to 6 As shown, the utility model provides a mandrel support frame quick replacement device 100, comprising:

[0044] The roll-changing transverse shifting structure comprises a first roll-changing transverse shifting vehicle 2 and a second roll-changing transverse shifting vehicle 7 which are arranged on both sides of the rolling center of the rolling mill (existing technology);

[0045] At least one frame pulling out and pushing device 1 for pulling out or pushing the mandrel support frame (existing technology) into the rolling mill inner track 12 (existing technology, arranged in the rolling mill outer frame 9, used to support the mandrel support frame, the mandrel support frame locking device is locked and fixed; the mandrel support frame enters and exits from both sides of the rolling mill outer frame 9), arranged on the side of the first roll-changing transverse transfer vehicle 2 and / or the second roll-changing transverse transfer vehicle 7 away from the rolling center of the rolling mill;

[0046] The transition stand structure is extended along the length direction of the rolling mill track toward the roll-changing transverse shifting structure. The transition stand structure and the roll stand 200 (existing technology) are staggered along the roll axis. The stand pulling-out and pushing-in device 1 drives the mandrel support frame to move along the roll-changing transverse shifting structure, the transition stand structure and the rolling mill track 12. As a result, the push-in and pull-out paths of the mandrel support frame are axially staggered with the roll stand. During the working period of the rolling mill, the relevant preparation work such as the stand hoisting required for the replacement of the mandrel support frame can be carried out, and the replacement of the mandrel support frame can be completed within the time period of the roll stand replacement. The rolling mill downtime is reduced and the production efficiency is improved.

[0047] Driven by the frame pulling out and pushing in device 1, the core rod support frames can be replaced individually or simultaneously.

[0048] There can be two frame pulling and pushing devices 1, which are respectively arranged on both sides of the rolling center of the rolling mill. The two frame pulling and pushing devices 1 operate simultaneously. The frame pulling and pushing device 1 on one side pulls out the mandrel support frame to be taken off the line, and the frame pulling and pushing device 1 on the other side pushes the mandrel support frame to be put on the line onto the inner track 12 of the rolling mill, thereby completing the taking off of the old mandrel support frame and the putting on of the new mandrel support frame at one time.

[0049] Only one frame pulling and pushing device 1 can be provided, which is arranged on one side of the rolling center of the rolling mill, and an auxiliary device is provided to cooperate with the frame pulling and pushing device 1 to synchronously pull the mandrel support frame to be put on the line and the mandrel support frame to be taken off the line, so as to complete the taking off of the old mandrel support frame and the putting on of the new mandrel support frame at one time.

[0050] like Figure 3 As shown, on a rolling mill production line, generally, multiple sets of the mandrel support frame quick replacement devices 100 of the utility model are arranged to meet the replacement requirements of the mandrel support frames.

[0051] The double lateral roll changing form of the three-roll continuous rolling mill increases the flexibility of the roll frame replacement and reduces the roll frame replacement time, but the existing technical solution for replacing the mandrel support frame has certain defects, which limits the improvement of the frame replacement efficiency. The utility model solves the problem that the mandrel support frame cannot be replaced quickly. The mandrel support frame can be replaced while the roll frame is replaced, which does not take up extra time, greatly shortens the frame replacement time, and improves the frame replacement efficiency.

[0052] The mandrel support frame quick replacement device of the utility model solves the problem that the mandrel support frame cannot be quickly replaced. The pushing-in and pulling-out paths of the mandrel support frame are axially staggered with the roll frame. The frame lifting and other related preparations required for the replacement of the mandrel support frame can be carried out during the working period of the rolling mill, and the replacement of the mandrel support frame can be completed within the time period of the roll frame replacement, thereby reducing the downtime of the rolling mill and improving the production efficiency. The frame pulling-out and pushing-in device 1 of the utility model pulls out the mandrel support frame to be taken off the line, and the mandrel support frame to be put on the line enters the inner track 12 of the rolling mill, thereby completing the taking off of the old mandrel support frame and the putting on of the new mandrel support frame at one time. The replacement operation of the mandrel support frame of the utility model is flexible and convenient, and it can be replaced separately or simultaneously, with less equipment movement and short replacement time, which can improve the operation time of the rolling mill.

[0053] Further, if Figure 1 , Figure 2 As shown, the transition platform structure includes a first transition platform 4 arranged between the inner rail 12 of the rolling mill and the first roll-changing transverse transfer vehicle 2, and a second transition platform 6 arranged between the inner rail 12 of the rolling mill and the second roll-changing transverse transfer vehicle 7. The first roll-changing transverse transfer vehicle track 3 extending along the length direction of the first transition platform 4 is arranged on the first roll-changing transverse transfer vehicle 2, and the second roll-changing transverse transfer vehicle track 8 extending along the length direction of the second transition platform 6 is arranged on the second roll-changing transverse transfer vehicle 7; the first transverse transfer vehicle track 3, the first transition platform 4, the inner rail 12 of the rolling mill, the second transition platform 6 and the second transverse transfer vehicle track 8 are arranged in the same line and connected.

[0054] The first roll-changing transverse transfer vehicle 2 and the second roll-changing transverse transfer vehicle 7 can both store the mandrel support frame 11 to be put on the line. When the mandrel support frame 11 to be put on the first roll-changing transverse transfer vehicle 2 is stored, the second roll-changing transverse transfer vehicle 7 is used as the off-line storage position for the mandrel support frame 10 to be taken off the line. And vice versa.

[0055] Further, if Figure 1 , Figure 2 As shown, the frame pulling out and pushing in device 1 comprises a first hook 13 capable of hooking the mandrel support frame, a first push plate 24 capable of being hooked, and a first driving part capable of providing power for the movement of the mandrel support frame.

[0056] The first driving part may be a hydraulic cylinder or a motor.

[0057] Further, if Figure 1 , Figure 2 As shown, the utility model also includes a roll-changing auxiliary structure 5 that can be connected between the mandrel support frame 11 to be put on the line and the mandrel support frame 10 to be taken off the line. The roll-changing auxiliary structure 5 assists in cooperating with the frame pulling-out and pushing-in device 1 to drive the mandrel support frame 11 to be put on the line and the mandrel support frame 10 to be taken off the line to move along the roll-changing transverse structure, the transition stand structure and the inner track 12 of the rolling mill.

[0058] The roller-changing auxiliary structure 5 is adopted to realize quick connection with the mandrel support frame, and the switching between the mandrel support frame on and off the line is completed in one action, which is simple to operate, fast in speed and high in efficiency in replacing the mandrel support frame.

[0059] Further, if Figure 1 , Figure 2 As shown, auxiliary hook parts that can hook the mandrel support frame and auxiliary push plate parts that can be hooked are arranged on both sides of the roller changing auxiliary structure 5, and a hook driving structure 25 that can drive the auxiliary hook part to hook the mandrel support frame or release the mandrel support frame is arranged below the transition platform structure.

[0060] The hook drive structure 25 of the roller changing auxiliary structure 5 is installed on the first transition stand 4 and the second transition stand 6, and each transition stand is installed with two sets of hook drive structures 25. The auxiliary hook part can be automatically and quickly disengaged from the mandrel support frame under the action of the hook drive structure 25, thereby improving production efficiency.

[0061] Further, if Figure 4 As shown, the roller changing auxiliary structure 5 includes a vehicle body 18, an auxiliary hook portion includes a second hook 19 and a third hook 20 hinged on both sides of the vehicle body, an auxiliary push plate portion includes a second push plate 22 arranged below the second hook 19 and a third push plate 23 arranged below the third hook 20, and a hook driving structure 25 drives the second hook 19 and the third hook 20 to swing.

[0062] Further, if Figure 5 , Figure 6 As shown, the hook driving structure 25 includes a second driving part 29, and the second driving part 29 is connected to the roller 28 through the rotating shaft 27 and the connecting rod 26. The roller 28 can move along the bottom of the vehicle body 18 to abut against the second hook 19 or the third hook 20 to make it swing. The second driving part 29 can be a hydraulic cylinder or a pneumatic cylinder.

[0063] Further, if Figure 4 , Figure 5 , Figure 6 As shown, a guide lining plate 21 is provided on the bottom surface of the vehicle body 18, and a guide groove is provided on the guide lining plate 21.

[0064] The roller-changing auxiliary structure 5 can be replaced by a rod or a rope to achieve the connection between the mandrel support frame 11 to be put on the line and the mandrel support frame 10 to be taken off the line.

[0065] Further, if Figure 1 , Figure 2As shown, one end of the first driving part close to the rolling center of the rolling mill is connected to a connecting support that can move along the roll changing transverse structure and the transition stand structure. The first hook 13 is a mechanical hook, and the first end of the first hook 13 is hinged to the connecting support; the first push plate 24 is arranged on the connecting support and is located below the first hook 13.

[0066] Embodiment 1

[0067] like Figure 1 , Figure 2 , Figure 3 As shown, a frame pulling and pushing device 1 is provided on the side of the first roll-changing transverse transfer vehicle 2 away from the rolling center of the rolling mill, a fourth hook 16 and a fifth hook 17 with notches facing upwards are provided on both sides of the mandrel support frame 11 to be put on line, and a sixth hook 14 and a seventh hook 15 with notches facing upwards are provided on both sides of the mandrel support frame 10 to be taken off line.

[0068] like Figure 1 As shown, the mandrel support frame 11 to be put on line is located on the second roll-changing transverse transfer vehicle 7, the roll-changing auxiliary structure 5 is located on the second transition stand 6, and its two ends are respectively hooked and connected to the mandrel support frame 11 to be put on line and the mandrel support frame 10 to be taken off line, that is, the second hook 19 is hooked to the seventh hook 15, and the third hook 20 is hooked to the fourth hook 16;

[0069] like Figure 1 As shown, the frame pulling out and pushing device 1 is hooked and connected to the mandrel support frame 10 to be unloaded, that is, the first hook 13 is hooked and connected to the sixth hook 14, and the first driving part retracts to pull the mandrel support frame 10 to be unloaded, the roll-changing auxiliary structure 5 and the mandrel support frame 11 to be loaded until the mandrel support frame 11 to be loaded reaches the inner track 12 of the rolling mill, and the mandrel support frame 10 to be unloaded reaches the first roll-changing transverse transfer vehicle 2, as shown in FIG. Figure 2 As shown;

[0070] The mandrel support frame 11 to be put on the line is located on the first roll-changing transverse shifting vehicle 2, the frame pulling-out and pushing-in device 1 is hooked and connected to the mandrel support frame 11 to be put on the line, the roll-changing auxiliary structure 5 is located on the first transition stand 4 and its two ends are respectively hooked and connected to the mandrel support frame 11 to be put on the line and the mandrel support frame 10 to be taken off the line, the first driving part extends out to push the mandrel support frame 10 to be taken off the line, the roll-changing auxiliary structure 5 and the mandrel support frame 11 to be put on the line until the mandrel support frame 11 to be put on the line reaches the inner track 12 of the rolling mill, and the mandrel support frame 10 to be taken off the line reaches the second roll-changing transverse shifting vehicle 7.

[0071] The mandrel support frame quick replacement device of the utility model is used to replace the mandrel support frame, comprising the following steps:

[0072] Step a: Figure 1As shown, a frame pulling out and pushing in device 1 is arranged on the side of the first roll-changing transverse transfer vehicle 2 away from the rolling center of the rolling mill, a support frame 11 for mandrels to be put on the second roll-changing transverse transfer vehicle 7 is stored and aligned with the track 12 inside the rolling mill; a roll-changing auxiliary structure 5 is placed on the second transition stand 6, and two sides of the roll-changing auxiliary structure 5 are respectively hooked and connected with a support frame 10 for mandrels to be taken off the line and a support frame 11 for mandrels to be put on the line; the frame pulling out and pushing in device 1 is hooked and connected with a support frame 10 for mandrels to be taken off the line;

[0073] Step b: The locking device of the mandrel support frame is opened, and the frame pulling and pushing device 1 is retracted to pull the mandrel support frame 10 to be unloaded from the rolling mill inner track 12 in the rolling mill outer frame 9 to the first roll-changing transverse transfer vehicle 2, and at the same time, the mandrel support frame 11 to be loaded on the second roll-changing transverse transfer vehicle 7 is pulled into the rolling mill inner track 12 (such as Figure 2 As shown), the replacement and movement of the online and offline mandrel support frames can be completed in one step;

[0074] Step c: Figure 6 As shown, the hook driving structure on the first transition stand 4 is actuated to disengage the roller-changing auxiliary structure from the mandrel support frame 10 to be unloaded and the mandrel support frame 11 to be loaded; the roller-changing auxiliary structure 5 stays on the first transition stand 4;

[0075] Step d, while the mandrel support frame is being replaced, the roll stand can be replaced synchronously; the mandrel support frame and the roll stand off the line are transported away;

[0076] Step e, hoist the next mandrel support frame 11 to be put on line to the first roll-changing transverse transfer vehicle 2, the second push plate 22 and the third push plate 23 of the roll-changing auxiliary structure 5 placed on the first transition stand 4 respectively abut against the hooks on the mandrel support frame 11 to be put on line and the mandrel support frame 10 to be taken off line, the frame pull-out and push-in devices on the same side of the rolling line extend, the first push plate 24 abuts against the hook on the mandrel support frame 11 to be put on line, and the preparation work is ready;

[0077] Step f, the locking device of the mandrel support frame is opened, and the frame pulling out and pushing device 1 pushes the mandrel support frame 11 to be put on the first roll-changing transverse transfer vehicle 2 onto the inner track 12 of the rolling mill, and at the same time pushes the mandrel support frame 10 to be taken off the line from the inner track 12 of the rolling mill to the second roll-changing transverse transfer vehicle 7, thus completing the replacement of the mandrel support frames on and off the line in one step;

[0078] Step g, the hook driving structure installed on the second transition stand 6 moves to disengage the roller-changing auxiliary structure from the mandrel support frame to be unloaded and the mandrel support frame to be loaded; the roller-changing auxiliary structure stays on the second transition stand;

[0079] Step h: When the mandrel support frame is replaced, the roll stand can be replaced synchronously; the mandrel support frame and the roll stand off the line are transported away.

[0080] The specific process is as follows:

[0081] During the replacement process of the mandrel support frame, first, the workshop crane lifts the mandrel support frame 11 to be put on the line to the second transverse transfer vehicle track 8 on the second roll-changing transverse transfer vehicle 7, and connects the second hook 19 and the third hook 20 on the roll-changing auxiliary structure 5 (roll-changing auxiliary trolley) placed on the second transition stand 6 to the seventh hook 15 and the fourth hook 16 on the mandrel support frame 10 to be taken off the line (online mandrel support frame) and the mandrel support frame 11 to be put on the line (offline mandrel support frame), respectively, and the frame pulling and pushing device 1 on one side of the rolling center of the rolling mill is extended, and the first hook 13 (mechanical hook) on the frame pulling and pushing device 1 is connected to the sixth hook 14 on the mandrel support frame 10 to be taken off the line, and the preparation work is ready.

[0082] The locking device of the mandrel support frame is opened, and the frame pulling and pushing device 1 is retracted to pull the mandrel support frame 10 to be unloaded from the rolling mill inner track 12 in the rolling mill outer frame 9 to the first transverse vehicle track 3 on the first roll-changing transverse vehicle 2, and at the same time, the mandrel support frame 11 to be loaded on the second transverse vehicle track 8 of the second roll-changing transverse vehicle 7 is pulled into the rolling mill inner track 12 in the rolling mill outer frame 9, completing the replacement and movement of the online and offline mandrel support frames in one step. The retraction pulling force of the first driving unit is transmitted through the hooks between the hooks.

[0083] The hook driving structure 25 of the roller changing auxiliary structure 5 installed on the first transition stand 4 is in motion, and the piston rod of the second driving part 29 (hydraulic cylinder) is extended to drive the connecting rod 26 to rotate around the rotating shaft 27. Under the action of the roller 28, the second hook 19 and the third hook 20 are lifted and opened, and the roller changing auxiliary structure 5 is disengaged from the mandrel support frame 10 to be unloaded (already offline) and the mandrel support frame 11 to be put online (already online).

[0084] When the core rod support frame is replaced, the old roll stand can be pulled out simultaneously.

[0085] After that, the first roll-changing transverse transfer vehicle 2 and the second roll-changing transverse transfer vehicle 7 move transversely, align the new roll frame on the line with the center of the rolling mill corresponding to the external frame, and push the new roll frame into the external frame of the rolling mill to complete the replacement of the roll frame. After all the roll frames are replaced, the mandrel support frame and the roll frame off the line are lifted away by the frame crane.

[0086] After the mandrel support frame that has been taken offline (the previous mandrel support frame 10 to be taken offline) is hoisted away, the auxiliary structure 5 for changing the rolls stays on the first transition stand 4. The next replacement of the mandrel support frame will start with the first transition stand 4. First, the workshop crane hoists the mandrel support frame 11 to be put online to the first transverse transfer vehicle track 3 of the first roll-changing transverse transfer vehicle 2. The second push plate 22 and the third push plate 23 of the auxiliary structure 5 for changing the rolls placed on the first transition stand 4 respectively abut against the fifth hook 17 and the sixth hook 14 on the mandrel support frame 11 to be put online and the mandrel support frame 10 to be taken offline. The frame pulling out and pushing in device 1 on the same side of the rolling line extends out, and the first push plate 24 abuts against the fourth hook 16 on the mandrel support frame 11 to be put online, and the preparation work is ready.

[0087] The locking device of the mandrel support frame is opened, and the frame pulling and pushing device 1 pushes the mandrel support frame 11 to be put on the first transverse vehicle track 3 of the first roll-changing transverse vehicle 2 into the rolling mill inner track 12 in the rolling mill outer frame 9, and at the same time pushes the mandrel support frame 10 to be taken off the rolling mill from the rolling mill inner track 12 in the rolling mill outer frame 9 to the second transverse vehicle track 8 of the second roll-changing transverse vehicle 7, completing the replacement of the online and offline mandrel support frames in one step. The thrust extended by the first driving part is transmitted through the abutment between each hook and the push plate.

[0088] The hook driving structure 25 of the roller changing auxiliary structure 5 installed on the second transition stand 6 is actuated, and the piston rod of the second driving part 29 is extended to drive the connecting rod 26 to rotate around the rotating shaft 27. Under the action of the roller 28, the second hook 19 and the third hook 20 are lifted and opened, and the roller changing auxiliary structure 5 is disengaged from the mandrel support frame 10 to be unloaded (already offline) and the mandrel support frame 11 to be put online (already online).

[0089] When the core rod support frame is replaced, the old roll stand can be pulled out simultaneously.

[0090] After that, the first roll-changing transverse transfer vehicle 2 and the second roll-changing transverse transfer vehicle 7 move transversely, align the new roll frame on the line with the center of the rolling mill corresponding to the external frame, and push the new roll frame into the external frame of the rolling mill to complete the replacement of the roll frame. After all the roll frames are replaced, the hook driving structure 25 lifts the mandrel support frame and the roll frame on the offline line by the frame crane. After the mandrel support frame on the offline line is lifted away, the roll-changing auxiliary structure 5 stays on the second transition stand 6, waiting for the next replacement.

[0091] As described above, the mandrel support frame quick replacement device of the utility model has the following beneficial effects:

[0092] The utility model solves the problem that the mandrel support frame cannot be quickly replaced. The pushing-in and pulling-out paths of the mandrel support frame are axially staggered with the roll frame. The frame hoisting and other related preparations required for the replacement of the mandrel support frame can be carried out during the working period of the rolling mill, and the replacement of the mandrel support frame can be completed within the time period of the roll frame replacement, thereby reducing the downtime of the rolling mill and improving the production efficiency.

[0093] The frame pulling out and pushing in device of the utility model pulls out the mandrel support frame to be unloaded and the mandrel support frame to be put on line enters the track inside the rolling mill, so that the unloading of the old mandrel support frame and the putting on of the new mandrel support frame are completed at one time;

[0094] The utility model adopts a roller-changing auxiliary structure to realize a quick connection with the mandrel support frame, and completes the conversion of the mandrel support frame between the upper line and the lower line in one action, and the operation is simple, the mandrel support frame is replaced quickly and the efficiency is high.

[0095] The core rod support frame of the utility model is flexible and convenient to replace and can be replaced individually or simultaneously, with less equipment movement and short replacement time, thus improving the operation time of the rolling mill.

[0096] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A quick replacement device for a mandrel support frame, characterized in that: include, The roll-changing transverse shifting structure comprises a first roll-changing transverse shifting vehicle and a second roll-changing transverse shifting vehicle arranged on both sides of the rolling center of the rolling mill; At least one frame pulling out and pushing in device for pulling out or pushing the mandrel support frame into the track in the rolling mill, arranged on the side of the first roll-changing transverse transfer vehicle and / or the second roll-changing transverse transfer vehicle away from the rolling center of the rolling mill; A transition stand structure is extended along the length direction of the inner track of the rolling mill toward the roll changing transverse movement structure. The transition stand structure and the roll frame are staggered along the roll axis. The frame pulling and pushing device drives the mandrel support frame to move along the roll changing transverse movement structure, the transition stand structure and the inner track of the rolling mill.

2. The mandrel support frame quick replacement device according to claim 1, characterized in that: The transition platform structure includes a first transition platform arranged between the inner track of the rolling mill and the first roll-changing transverse transfer vehicle, and a second transition platform arranged between the inner track of the rolling mill and the second roll-changing transverse transfer vehicle. The first roll-changing transverse transfer vehicle is provided with a first transverse transfer vehicle track extending along the length direction of the first transition platform, and the second roll-changing transverse transfer vehicle is provided with a second transverse transfer vehicle track extending along the length direction of the second transition platform; the first transverse transfer vehicle track, the first transition platform, the inner track of the rolling mill, the second transition platform and the second transverse transfer vehicle track are arranged in the same line and through each other.

3. The mandrel support frame quick replacement device according to claim 2, characterized in that: The frame pulling out and pushing in device comprises a first hook capable of hooking the mandrel support frame, a first push plate capable of being hooked, and a first driving part capable of providing power for the movement of the mandrel support frame.

4. The mandrel support frame quick replacement device according to claim 3, characterized in that: It comprises a roll-changing auxiliary structure which can be connected between a support frame for mandrel rods to be put on line and a support frame for mandrel rods to be taken off line. The roll-changing auxiliary structure assists in cooperating with the frame pulling-out and pushing-in device to drive the support frame for mandrel rods to be put on line and the support frame for mandrel rods to be taken off line to move along the roll-changing transverse structure, the transition stand structure and the track inside the rolling mill.

5. The mandrel support frame quick replacement device according to claim 4, characterized in that: Auxiliary hook parts that can hook the mandrel support frame and auxiliary push plate parts that can be hooked are arranged on both sides of the roller changing auxiliary structure, and a hook driving structure that can drive the auxiliary hook part to hook the mandrel support frame or release the mandrel support frame is arranged below the transition platform structure.

6. The mandrel support frame quick replacement device according to claim 5, characterized in that: The roller-changing auxiliary structure includes a vehicle body, the auxiliary hook portion includes a second hook and a third hook hinged on both sides of the vehicle body, the auxiliary push plate portion includes a second push plate arranged below the second hook and a third push plate arranged below the third hook, and the hook driving structure drives the second hook and the third hook to swing.

7. The mandrel support frame quick replacement device according to claim 6, characterized in that: The hook driving structure includes a second driving part, and the second driving part is connected to a roller through a rotating shaft and a connecting rod. The roller can move along the bottom of the vehicle body to abut against the second hook or the third hook to make it swing.

8. The mandrel support frame quick replacement device according to claim 7, characterized in that: A guide lining is arranged on the bottom surface of the vehicle body, a guide groove is arranged on the guide lining, and the roller moves along the guide groove.

9. The mandrel support frame quick replacement device according to claim 4, characterized in that: The frame pulling out and pushing in device is arranged on the side of the first roll-changing transverse shifting car away from the rolling center of the rolling mill, the mandrel support frame to be put on line is located on the second roll-changing transverse shifting car, the roll-changing auxiliary structure is located on the second transition stand and its two ends are respectively hooked and connected to the mandrel support frame to be put on line and the mandrel support frame to be taken off line, the frame pulling out and pushing in device is hooked and connected to the mandrel support frame to be taken off line, the first driving part retracts and pulls the mandrel support frame to be taken off line, the roll-changing auxiliary structure and the mandrel support frame to be put on line until the mandrel support frame to be put on line reaches the inner track of the rolling mill and the mandrel support frame to be taken off line reaches the first roll-changing transverse shifting car; or, The support frame for the mandrel to be put on the line is located on the first roll-changing transverse shifting vehicle, the frame pulling out and pushing in device is hooked and connected to the support frame for the mandrel to be put on the line, the roll-changing auxiliary structure is located on the first transition platform and its two ends are respectively hooked and connected to the support frame for the mandrel to be put on the line and the support frame for the mandrel to be taken off the line, the first driving part extends out to push the support frame for the mandrel to be taken off the line, the roll-changing auxiliary structure and the support frame for the mandrel to be put on the line until the support frame for the mandrel to be put on the line reaches the inner track of the rolling mill, and the support frame for the mandrel to be taken off the line reaches the second roll-changing transverse shifting vehicle.

10. The mandrel support frame quick replacement device according to claim 3, characterized in that: One end of the first driving part close to the rolling center of the rolling mill is connected to a connecting support that can move along the roll changing transverse structure and the transition platform structure. The first hook is a mechanical hook, and the first end of the first hook is hinged to the connecting support; the first push plate is arranged on the connecting support and is located below the first hook.

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