Double-front-door device of multi-roll mill
By adopting a dual front door device on a multi-roll mill, the coordinated design of the inner and outer front doors has solved the problems of complex operation, poor sealing effect and increased equipment wear in the prior art, simplified rolling gap observation and roll replacement operation, and improved the roll driving accuracy and sealing effect.
Patent Information
- Application Number
- CN202422231096.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The front door devices of existing multi-roll mills have problems such as complex operation, poor sealing effect, increased equipment wear and low roller driving accuracy when observing the rolling gap and replacing the work roller and intermediate rollers.
A double front door device is adopted, including a hinged inner front door and an outer front door. A roller replacement window is provided on the inner front door. The outer front door is used for closure. The inner front door can be locked on the frame. The outer front door can be locked on the inner front door. A work roller thrust stopper is provided on the inner front door. An intermediate roller thrust stopper is provided on the inner front door. An emulsion channel is provided on the outer front door. Simple observation and roller replacement operation are achieved through the cooperation of the inner and outer front doors.
The rolling gap observation and roll replacement operation are simplified, equipment wear is reduced, the accuracy and sealing effect of rolling is improved, and labor intensity is reduced.
Smart Images
Figure CN223083517U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal rolling, and particularly relates to a double front door device for a multi-roll rolling mill. Background Art
[0002] The cold rolling multi-roll rolling mill is an important device for producing metal sheets and thin strips, and is mainly used for the cold rolling production of thin sheets and thin strip steels of high-strength steels and precision alloys. It occupies a special position in the production of thin sheet strips. Almost all stainless steel thin sheets are produced by multi-roll rolling mills, and multi-roll rolling mills are also used in the production of thin strips such as electrical steel sheets, superhard metals, aluminum alloys, and copper alloys.
[0003] When a multi-roll rolling mill is rolling, it is usually necessary for the front door to provide thrust support for the work rolls and intermediate rolls, close and seal the rolling mill window, and protect the safety of operators and equipment. In some cases, the front door also integrates functions such as rolling emulsion transportation and roll shifting of the work roll or intermediate roll. The working characteristics of the multi-roll rolling mill determine that the work rolls and intermediate rolls need to be replaced frequently. The replacement is usually carried out from the front door side. At the same time, during the rolling gap, it is necessary to observe the equipment and strip state inside the rolling mill, and all these require interaction with the front door.
[0004] At present, there are three forms of front doors for multiple rolling mills:
[0005] The first is a separate front door, with or without an integrated roll shifting device. The structure is relatively simple, but each time when observing, replacing the work roll or intermediate roll during rolling, it is necessary to open and close the heavy front door, resulting in high labor intensity. At the same time, it brings additional risks to the sealing of the rolling mill window.
[0006] The second is to open a hole in the front door and install a small door that can be separately opened, closed or removed. The small door integrates a roll shifting device for observing, replacing the work roll or intermediate roll during the rolling gap. Since the small door is hinged to the front door and the front door is hinged to the rolling mill frame, for the roll shifting device on it, one or two intermediate links are added, increasing the position deviation after equipment wear and affecting the accuracy of roll shifting drive and equipment reliability. At the same time, it occupies the working surface on the front door side and has certain limitations on the automatic roll changing device.
[0007] The third is to set a movable upper roll shifting device, a middle small door, and a lower roll shifting device on the front door. The upper and lower roll shifting devices can be moved and switched parallel to the front door. The device is relatively complex. Even when fully opened during roll changing, it still occupies space beside the front door window, making it difficult to pick up and push the roll and visually observe. The movable upper, middle and lower structures are connected to each other, and the sealing effect is poor. The large gaps and wear of the translation structure also affect the accuracy of roll shifting drive. Summary of the Invention
[0008] In view of this, the purpose of the utility model is to provide a double front door device for a multi-roll rolling mill.
[0009] The double front door device for a multi-roll rolling mill provided by the present utility model adopts the following technical solutions:
[0010] A double front door device for a multi-roll rolling mill, comprising an inner front door and an outer front door which are hingedly and swingably arranged on a frame. A roll-changing window is arranged on the inner front door, and the outer front door is used to close the roll-changing window. The inner front door can be locked on the frame, and the outer front door can be locked on the inner front door. A work roll thrust device for laterally supporting and stopping the work roll is arranged on the inner side of the outer front door, and an intermediate roll thrust member for laterally supporting and stopping the intermediate roll is arranged on the inner front door. When the outer front door is closed, the work roll thrust device passes through the roll-changing window.
[0011] Furthermore, a first locking assembly for locking the inner front door is arranged on the frame. The first locking assembly includes a first telescopic member and a first locking block arranged on the telescopic end of the first telescopic member. A first clamping block is arranged on the inner front door, and the first clamping block can be inserted into the first locking block to lock the inner front door on the frame.
[0012] Furthermore, a second locking assembly for locking the outer front door is arranged on the inner front door. The second locking assembly includes a second telescopic member and a second locking block arranged on the telescopic end of the second telescopic member. A second clamping block is arranged on the outer front door, and when the outer front door closes the roll-changing window, the second clamping block can be inserted into the second locking block to lock the outer front door on the inner front door.
[0013] Furthermore, an emulsion channel is arranged on the outer front door.
[0014] Furthermore, a support bearing for laterally supporting the work roll is arranged on the work roll thrust device.
[0015] Furthermore, a rotating shaft for installing the inner front door and the outer front door is arranged on the frame.
[0016] Furthermore, an intermediate roll shifting device for shifting the intermediate roll is arranged on the outer side of the outer front door.
[0017] Furthermore, a driving member for driving a plug to cooperate with a corresponding roll shifting device on the driving side to laterally support and position two intermediate rolls is arranged on the intermediate roll shifting device.
[0018] Furthermore, a handle is arranged on the outer front door.
[0019] In summary, the present utility model includes at least one of the following beneficial effects: When observing the rolling gap, open the outer front door and observe through the roll change window on the inner front door; when changing the work roll, open the outer front door, observe and then take out the original work roll, and replace it with a new work roll; when changing the first intermediate roll, the roll shifting device first shifts the roll to the operation side, open the outer front door, observe and then take out the original first intermediate roll, and replace it with the first intermediate roll. The rolling gap observation and roll change operation are simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a schematic structural diagram of the double front doors of the embodiment of the present utility model when closed;
[0021] Figure 2 is a schematic structural diagram of the inner side of the double front doors of the embodiment of the present utility model when closed;
[0022] Figure 3 is a schematic structural diagram of the double front doors of the embodiment of the present utility model when open.
[0023] DESCRIPTION OF THE REFERENCE NUMERALS:
[0024] 1. Inner front door; 11. Roll change window; 12. First clamping block; 2. Outer front door; 21. Second clamping block; 22. Emulsion channel; 23. Handle; 3. Work roll thrust stopper; 31. Support bearing; 4. Intermediate roll thrust member; 5. First locking assembly; 51. First telescopic member; 52. First locking block; 6. Second locking assembly; 61. Second telescopic member; 62. Second locking block; 7. Rotating shaft; 8. Intermediate roll shifting device; 81. Driving member. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The following specific examples illustrate the embodiments of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.
[0026] The following will further describe the present utility model in detail Figures 1-3 in conjunction with the appended
[0027] The embodiment of the present utility model discloses a double front door device for a multi-roll rolling mill. Refer to Figures 1-3, the double front door device of the multi-roll rolling mill includes an inner front door 1 and an outer front door 2 that are hingedly and swingably arranged on the frame. A roll-changing window 11 is provided on the inner front door 1, and the outer front door 2 is used to close the roll-changing window 11. The inner front door 1 is surrounded by rubber strips to form a seal with the outside of the rolling mill window to prevent the emulsion from overflowing. The inner front door 1 can be locked on the frame, and the outer front door 2 can be locked on the inner front door 1. A work roll thrust stopper 3 for laterally supporting and stopping the work roll is provided on the inner side of the outer front door 2, and an intermediate roll thrust member 4 for laterally supporting and stopping the second intermediate roll is provided on the inner front door 1. When the outer front door 2 is closed, the work roll thrust stopper 3 and the intermediate roll thrust member 4 pass through the roll-changing window 11; when observing the rolling gap, the outer front door 2 is opened and observed through the roll-changing window 11 on the inner front door 1; when changing the work roll, the outer front door 2 is opened, the original work roll is taken out after observation, and a new work roll is replaced; when changing the intermediate roll, the roll shifting device first shifts the roll to the operating side, the outer front door 2 is opened, the original intermediate roll is taken out after observation, and an intermediate roll is replaced. The rolling gap observation and roll-changing operations are simpler and more convenient.
[0028] In this embodiment, a first locking assembly 5 for locking the inner front door 1 is provided on the frame. The first locking assembly 5 includes a first telescopic member 51 and a first locking block 52 provided at the telescopic end of the first telescopic member 51. A first clamping block 12 is provided on the inner front door 1, and the first clamping block 12 can be inserted into the first locking block 52 to lock the inner front door 1 on the frame. The first telescopic member 51 is an electric push cylinder. By pushing the first locking block 52 to move through the first telescopic member 51, the first clamping block 12 can be inserted into the slot reserved at the end of the first locking block 52 to lock the inner front door 1.
[0029] In this embodiment, a second locking assembly 6 for locking the outer front door 2 is provided on the inner front door 1. The second locking assembly 6 includes a second telescopic member 61 and a second locking block 62 provided at the telescopic end of the second telescopic member 61. A second clamping block 21 is provided on the outer front door 2. When the outer front door 2 closes the roll-changing window 11, the second clamping block 21 can be inserted into the second locking block 62 to lock the outer front door 2 on the inner front door 1. The second telescopic member 61 is an electric push cylinder. By pushing the second locking block 62 to move through the second telescopic member 61, the second clamping block 21 can be inserted into the slot reserved at the end of the second locking block 62 to lock the inner front door 2.
[0030] In this embodiment, an emulsion channel 22 is provided on the outer front door 2 to assist in providing emulsion to the inside of the rolling mill.
[0031] In this embodiment, a support bearing 31 for laterally supporting the work roll is provided on the work roll thrust stopper 3. The support bearing 31 is a high-speed bearing. Inside the work roll thrust stopper 3, there is a spring or other buffer structure to support the support bearing 31, which can laterally support the work roll non-rigidly to prevent excessive movement of the roll during operation.
[0032] In this embodiment, a rotating shaft 7 for installing the inner front door 1 and the outer front door 2 is provided on the frame. The coaxial structure of the inner front door 1 and the outer front door 2 ensures that the interference range of the front door is small and controllable, and there is no need to wait for the outer front door 2 to be locked on the inner front door 1 before opening the inner front door 1.
[0033] In this embodiment, an intermediate roll shifting device 8 for shifting the intermediate roll is provided on the outer side of the outer front door 2 to realize the intermediate roll shifting action. In this embodiment, the intermediate roll shifting device 8 is a push-push type, that is, there is a corresponding roll shifting device on the drive side to shift the intermediate roll in the reverse direction. In other embodiments, it can also be a push-pull type, and there is no corresponding device on the drive side.
[0034] In this embodiment, a driving member 81 for driving the plug to cooperate with the corresponding roll shifting device on the drive side to laterally support and position the two intermediate rolls is provided on the intermediate roll shifting device 8. The driving member is a hydraulic cylinder.
[0035] In this embodiment, a handle 23 is provided on the outer front door 2 to facilitate opening the outer front door 2.
[0036] When observing the rolling gap of the unit, open the second locking assembly 6 on the inner front door 1, manually open the outer front door 2, and observe the strip steel, emulsion, work roll, and first intermediate roll inside the frame through the roll changing window 11 on the inner front door 1. If a problem is found or a larger window is needed to further determine the problem, the first locking assembly 5 can be directly unlocked and the inner front door 1 can be opened while the outer front door 2 is open.
[0037] When changing the work roll and the first intermediate roll of the unit, open the second locking assembly 6, manually open the outer front door 2, take out the work roll and the first intermediate roll through the roll changing window 11 on the inner front door 1, and load the prepared new rolls into the rolling mill through the roll changing window 11. The roll changing operation can be carried out when there is strip steel in the rolling mill. After loading is completed, manually close the outer front door 2, and the second locking assembly 6 locks the outer front door 2. The intermediate roll shifting actuator moves to a suitable position to complete the changing of the work roll and the first intermediate roll.
[0038] When the second intermediate roll and backup roll are changed and other equipment inside the stand is operated, the first locking component 5 needs to be unlocked, and the inner front door 1 is manually opened to the maximum position. This maximum position is determined by the non-rigid stop mechanism on the outer front door frame and the rolling mill stand to ensure that all equipment inside the rolling mill can enter and exit the rolling mill window without interference from the front door and its attached equipment. After the roll change and other equipment operations are completed, the inner front door 1 is manually closed, and the first locking component 5 of the inner front door is operated to lock the inner front door 1.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.
Claims
1. A double front door device for a multi-roll rolling mill, characterized in that: It includes an inner front door (1) and an outer front door (2) which are hingedly and swingably arranged on the frame. A roll changing window (11) is provided on the inner front door (1). The outer front door (2) is used to close the roll changing window (11). The inner front door (1) can be locked on the frame. The outer front door (2) can be locked on the inner front door (1). A work roll thrust device (3) for laterally supporting and stopping the work roll is provided on the inner side of the outer front door (2). A intermediate roll stopper (4) for laterally supporting and stopping the intermediate roll is provided on the inner front door (1). When the outer front door (2) is closed, the work roll thrust device (3) passes through the roll changing window (11).
2. The double front door device of the multi-roll rolling mill according to claim 1, characterized in that: A first locking assembly (5) for locking the inner front door (1) is provided on the frame. The first locking assembly (5) includes a first telescopic member (51) and a first locking block (52) provided at the telescopic end of the first telescopic member (51). A first latch (12) is provided on the inner front door (1). The first latch (12) can be inserted into the first locking block (52) to lock the inner front door (1) on the frame.
3. The double front door device of the multi-roll rolling mill according to claim 1, characterized in that: A second locking assembly (6) for locking the outer front door (2) is provided on the inner front door (1). The second locking assembly (6) includes a second telescopic member (61) and a second locking block (62) provided at the telescopic end of the second telescopic member (61). A second latch (21) is provided on the outer front door (2). When the outer front door (2) closes the roll changing window (11), the second latch (21) can be inserted into the second locking block (62) to lock the outer front door (2) on the inner front door (1).
4. The double front door device of the multi-roll rolling mill according to claim 1, characterized in that: An emulsion channel (22) is provided on the outer front door (2).
5. The double front door device of the multi-roll rolling mill according to claim 1, characterized in that: A support bearing (31) for laterally supporting the work roll is provided on the work roll thrust device (3).
6. The double front door device of the multi-roll rolling mill according to claim 1, characterized in that: A rotating shaft (7) for installing the inner front door (1) and the outer front door (2) is provided on the frame.
7. The double front door device of the multi-roll rolling mill according to claim 1, characterized in that: An intermediate roll shifting device (8) for shifting the intermediate roll is provided on the outer side of the outer front door (2).
8. The double front door device of the multi-roll rolling mill according to claim 7, characterized in that: A driving member (81) for driving the plug to cooperate with the corresponding roll shifting device on the driving side to laterally support and position the two intermediate rolls is provided on the intermediate roll shifting device (8).
9. The double front door device of the multi-roll rolling mill according to claim 1, characterized in that: A handle (23) is provided on the outer front door (2).