Emergency roll changing device of rolling mill

Abstract

The utility model relates to an emergency roll changing device of a rolling mill and belongs to the technical field of rolling mill roll changing in metallurgical industry. According to the technical scheme, the emergency roll changing device comprises an emergency roll changing device operation side working roll bearing seat (1), an emergency roll changing device transmission side working roll bearing seat (2), a hook head assembly (3) and a connecting pipe fitting (4), and the emergency roll changing device operation side working roll bearing seat (1) and the emergency roll changing device transmission side working roll bearing seat (2) are connected through the connecting pipe fitting (4). Emergency roll changing device wheels (103) are arranged below the emergency roll changing device operation side working roll bearing seat (1) and the emergency roll changing device transmission side working roll bearing seat (2), a towing hook assembly (102) is arranged on the outer side of the emergency roll changing device operation side working roll bearing seat (1), and a hook head assembly (3) is arranged on the outer side of the emergency roll changing device transmission side working roll bearing seat (2). The emergency roll changing device has the advantages that emergency roll changing of the working roll can be completed, and normal production of a production line is guaranteed.

Description

Technical Field

[0001] The utility model relates to an emergency roll changing device for a rolling mill, belonging to the technical field of roll changing for rolling mills in the metallurgical industry. Background Technique

[0002] Refer to the attached Figure 7 As shown in the figure, the assembly of the working roll 02 of the rolling mill consists of a working roll drag hook 021, a lower working roll bearing block 022 on the operating side of the rolling mill, a lower working roll bearing block 023 on the driving side of the rolling mill, an upper working roll bearing block 024 on the operating side of the rolling mill, an upper working roll bearing block 025 on the driving side of the rolling mill, a working roll 026, a rolling mill working roll wheel 027, etc. After the working roll of the rolling mill is used for a period of time, the roll body is worn, the working surface quality deteriorates, and it cannot continue to work and needs to be replaced. The old working roll is replaced by a roll changing device, a new working roll is installed, and the old working roll is pulled to the roll grinding workshop, lifted and replaced with a new working roll for standby.

[0003] There are various forms of roll changing devices, but the form of "push-pull hydraulic cylinder roll changing + working roll trailer" is more commonly used. As Figure 8 shown, the roll changing push-pull hydraulic cylinder 01 has the advantages of large driving force, stable and reliable performance, and mature technology, and can quickly complete the replacement of the working roll 02 of the rolling mill. However, due to factors such as stroke and installation space limitations, the old roll taken off the machine cannot be pulled to the roll grinding workshop. Therefore, after the roll changing is completed, the roll changing push-pull hydraulic cylinder 01 is retracted and flipped to the lower part through the hydraulic cylinder flipping mechanism 03, and the working roll trailer 04 is used to pull the old working roll located on the transverse movement platform 05 along the working roll trailer track 06 to the roll grinding workshop for standby roll. This roll changing device is widely used in hot continuous rolling and heavy plate production lines.

[0004] The roll changing push-pull hydraulic cylinder is an important component in the roll changing device and is used frequently with complex working conditions. Once the roll changing push-pull hydraulic cylinder fails, such as internal leakage in the cylinder body, deformation or scratching of the plunger rod, cracking of the cylinder body, etc., it will cause the rolling mill to be unable to change rolls normally, unable to guarantee product quality, and can only be shut down for maintenance passively. Production can only resume after replacing the working roll after the maintenance is completed. Due to the long length and heavy weight of this hydraulic cylinder, its maintenance or replacement takes a long time. Due to the unplanned shutdown, it affects the previous and subsequent processes, such as steelmaking and ironmaking, gas balance, contract delivery, etc., disrupting the normal production organization plan and seriously affecting the normal production rhythm. Therefore, a new technical solution is urgently needed to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an emergency roll changing device for a rolling mill, which can complete the emergency roll changing of the working roll, ensure the normal production of the production line, and solve the problems existing in the background technique.

[0006] The technical solution of the utility model is as follows:

[0007] An emergency roll changing device for a rolling mill, comprising a working roll bearing housing on the operating side of the emergency roll changing device, a working roll bearing housing on the driving side of the emergency roll changing device, a hook head assembly and connecting pipe fittings. The working roll bearing housing on the operating side of the emergency roll changing device and the working roll bearing housing on the driving side of the emergency roll changing device are connected by the connecting pipe fittings. Emergency roll changing device wheels that match the roll changing guide rails of the rolling mill are provided below both the working roll bearing housing on the operating side of the emergency roll changing device and the working roll bearing housing on the driving side of the emergency roll changing device. A towing hook assembly is provided on the outer side of the working roll bearing housing on the operating side of the emergency roll changing device, and a hook head assembly is provided on the outer side of the working roll bearing housing on the driving side of the emergency roll changing device.

[0008] The hook head assembly on the outer side of the working roll bearing housing on the driving side of the emergency roll changing device comprises a base fixedly connected to the working roll bearing housing on the driving side of the emergency roll changing device by bolts and a hook provided on the base.

[0009] Bolt clearance holes are provided on the base.

[0010] Connecting holes that match the connecting pipe fittings are respectively provided on the opposite surfaces of the working roll bearing housing on the operating side of the emergency roll changing device and the working roll bearing housing on the driving side of the emergency roll changing device.

[0011] Triangle ribs are provided between the working roll bearing housing on the operating side of the emergency roll changing device and the connecting pipe fittings, and between the working roll bearing housing on the driving side of the emergency roll changing device and the connecting pipe fittings.

[0012] The beneficial effects of the present utility model are: It can achieve emergency roll changing of the working roll trailer in the case of a failure of the roll changing push-pull hydraulic cylinder, and avoid long-term abnormal unplanned shutdown of the production line for handling. Description of the Drawings

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0014] Figure 2 It is a structural schematic diagram of the working roll bearing housing on the operating side of the emergency roll changing device;

[0015] Figure 3 It is a structural schematic diagram of the working roll bearing housing on the driving side of the emergency roll changing device;

[0016] Figure 4 It is a structural schematic diagram of the hook head assembly;

[0017] Figure 5 It is a schematic diagram of the present utility model when the roll extraction / roll pushing is in place;

[0018] Figure 6 It is a schematic diagram of the present utility model when the roll is extracted in place / ready to push the roll;

[0019] Figure 7 It is a structural schematic diagram of the working roll of the rolling mill in the background art;

[0020] Figure 8 It is a structural schematic diagram of the work roll changing system in the background art.

[0021] In the figure, the markings are: 01 - roll changing push - pull hydraulic cylinder, 011 - hook;

[0022] 02 - rolling mill work roll assembly, 021 - work roll drag hook, 022 - lower work roll bearing housing on the operating side of the rolling mill, 023 - lower work roll bearing housing on the drive side of the rolling mill, 024 - upper work roll bearing housing on the operating side of the rolling mill, 025 - upper work roll bearing housing on the drive side of the rolling mill, 026 - work roll, 027 - rolling mill work roll wheel;

[0023] 03 - hydraulic cylinder flipping mechanism;

[0024] 04 - work roll trailer, 041 - work roll trailer hook head assembly;

[0025] 05 - traversing platform;

[0026] 06 - work roll trailer track;

[0027] 1 - lower work roll bearing housing on the operating side of the emergency roll changing device, 101 - connection hole, 102 - drag hook assembly, 103 - emergency roll changing device wheel;

[0028] 2 - lower work roll bearing housing on the drive side of the emergency roll changing device, 201 - connection hole, 202 - internal thread hole;

[0029] 3 - hook head assembly, 301 - base, 302 - hook, bolt clearance hole 3011;

[0030] 4 - connecting pipe fitting;

[0031] 5 - triangular rib, 501 - lifting hole. Detailed implementation mode

[0032] The following further illustrates the present utility model through examples in conjunction with the attached drawings.

[0033] Refer to the attached Figures 1-6 , An emergency roll changing device for a rolling mill, comprising a lower work roll bearing housing 1 on the operating side of the emergency roll changing device, a lower work roll bearing housing 2 on the drive side of the emergency roll changing device, a hook head assembly 3 and a connecting pipe fitting 4. The lower work roll bearing housing 1 on the operating side of the emergency roll changing device and the lower work roll bearing housing 2 on the drive side of the emergency roll changing device are connected by the connecting pipe fitting 4. Emergency roll changing device wheels 103 that match the rolling mill roll changing guide rails are provided below both the lower work roll bearing housing 1 on the operating side of the emergency roll changing device and the lower work roll bearing housing 2 on the drive side of the emergency roll changing device. A drag hook assembly 102 is provided outside the lower work roll bearing housing 1 on the operating side of the emergency roll changing device, and a hook head assembly 3 is provided outside the lower work roll bearing housing 2 on the drive side of the emergency roll changing device.

[0034] In this embodiment, as Figures 1-4 shown, the utility model provides an emergency roll changing device for a rolling mill, which mainly includes an emergency roll changing device operating side work roll bearing housing 1, an emergency roll changing device drive side work roll bearing 2, a hook head assembly 3, a connecting pipe fitting 4, and a triangular rib 5, wherein:

[0035] Referring to Appendix Figure 2 and Appendix Figure 7 , the emergency roll changing device operating side work roll bearing housing 1 uses a waste rolling mill operating side work roll bearing housing 022, and two connecting holes 101 are provided on its inner side surface. The connecting holes 101 are blind holes. At the same time, its drag hook assembly 102 is the same as the work roll drag hook 021 in the background technology and can be connected and used in cooperation with the hook head of the roll changing device. The emergency roll changing device wheel 103 is the rolling mill work roll wheel 027 in the background technology and can walk along the roll changing guide rail.

[0036] Referring to Appendix Figure 3 and Appendix Figure 7 , the emergency roll changing device drive side work roll bearing housing 2 uses a waste rolling mill drive side work roll bearing housing 023, and two connecting holes 201 are provided on its inner side surface. The connecting holes 201 are blind holes and are kept consistent with the diameter and depth of the connecting hole 102. Multiple internal threaded holes 202 are additionally provided on the outer side of the bearing housing. Other structures are kept consistent with the structure of the rolling mill drive side lower work roll bearing housing 023 in the background technology. The emergency roll changing device wheel 103 is the rolling mill work roll wheel 027 in the background technology and can walk along the roll changing guide rail.

[0037] Referring to Appendix Figure 4 and Appendix Figure 8 , the hook head assembly 3 is mainly composed of a base 301 and a hook 302. Bolt clearance holes 3011 are provided on the base 301, and their distribution is kept consistent with the internal threaded holes 202 in the emergency roll changing device drive side work roll bearing housing 2. The structure of the hook 302 is kept consistent with the hook 011 part of the roll changing push-pull hydraulic cylinder 01. The hook head assembly 3 is fixedly connected to the emergency roll changing device drive side work roll bearing housing 2 through bolts and can be connected and used in cooperation with the drag hook assembly 102.

[0038] Referring to Appendix Figure 1 , the connecting pipe fitting 4 is a thick-walled circular pipe welded part, and its outer diameter is kept consistent with the diameters of the bearing housing connecting holes 101 and 201. The connecting pipe fitting 4 can be inserted into the connecting holes, and the emergency roll changing device operating side work roll bearing housing 1 and the emergency roll changing device drive side work roll bearing housing 2 are connected by welding and are connected and strengthened through the triangular rib 5. At the same time, a lifting hole 501 is provided on the triangular rib 5 at its upper part.

[0039] Referring to Appendix Figure 1 and Appendix Figure 8, the total length of the present utility model is greater than the distance between the hook head 041 at the mill side limit position of the work roll trailer 04 and the work roll towing hook 021 inside the mill.

[0040] The present utility model can overcome the problems of limited length of the work roll trailer track due to interference with the transverse movement platform and limited stroke of the work roll trailer, extend the working range of the work roll trailer, and realize the emergency roll change of the work roll trailer.

[0041] Refer to the appendix Figure 5 , 6 , when the roll change push-pull hydraulic cylinder fails and cannot be used, the present utility model is used for emergency roll change. The roll change process is as follows:

[0042] Withdraw the old work roll:

[0043] Flip and hide the roll change push-pull hydraulic cylinder 01, hoist the roll change emergency device onto the track of the transverse movement platform 05, and execute the normal roll change steps; after reaching the step of withdrawing the work roll, start the work roll trailer 04, connect the hook head assembly 041 of the work roll trailer to the towing hook assembly 102 of the roll change emergency device, and connect the hook head assembly 3 of the roll change emergency device to the work roll towing hook 021 of the mill. Operate to start the roll change work roll trailer and withdraw the mill work roll 02.

[0044] Push the new work roll:

[0045] After the new work roll is transversely moved in place, use the roll change work roll trailer and the roll change emergency device to push the new work roll into place, and execute the subsequent roll change steps to complete the replacement of the mill work roll.

Claims

1. An emergency roll changing device for a rolling mill, characterized in that: The invention comprises a working roll bearing seat (1) on the operating side of an emergency roll changing device, a working roll bearing seat (2) on the transmission side of the emergency roll changing device, a hook assembly (3) and a connecting pipe (4). The working roll bearing seat (1) on the operating side of the emergency roll changing device and the working roll bearing seat (2) on the transmission side of the emergency roll changing device are connected via the connecting pipe (4). Emergency roll changing device wheels (103) matching with the rolling mill roll changing guide rail are arranged below the working roll bearing seat (1) on the operating side of the emergency roll changing device and the working roll bearing seat (2) on the transmission side of the emergency roll changing device. A towing hook assembly (102) is arranged on the outer side of the working roll bearing seat (1) on the operating side of the emergency roll changing device, and a hook assembly (3) is arranged on the outer side of the working roll bearing seat (2) on the transmission side of the emergency roll changing device.

2. The rolling mill emergency roll changing device according to claim 1, characterized in that: The hook assembly (3) on the outer side of the working roll bearing seat (2) on the driving side of the emergency roll changing device comprises a base (301) fixedly connected to the working roll bearing seat (2) on the driving side of the emergency roll changing device by bolts, and a hook (302) arranged on the base (301).

3. The rolling mill emergency roll changing device according to claim 2, characterized in that: The base (301) is provided with a bolt clearance hole (3011).

4. The rolling mill emergency roll changing device according to claim 1, characterized in that: Connecting holes that match the connecting pipe (4) are respectively provided on the opposing surfaces of the working roll bearing seat (1) on the operating side of the emergency roll changing device and the working roll bearing seat (2) on the driving side of the emergency roll changing device.

5. The rolling mill emergency roll changing device according to claim 4, characterized in that: Triangular ribs (5) are provided between the working roll bearing seat (1) on the operating side of the emergency roll changing device and the connecting pipe fitting (4), and between the working roll bearing seat (2) on the driving side of the emergency roll changing device and the connecting pipe fitting (4).

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