Rolling mill guide ruler protection mechanism
By installing a liner and a composite heat insulation layer on the guide rail seat of the rolling mill, the problem of loose bolt connections caused by thermal expansion of the guide rail was solved, thus achieving stable operation of the rolling production line and reducing wear.
Patent Information
- Application Number
- CN202422940945.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-30
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-30
AI Technical Summary
When existing rolling mill guides come into contact with steel billets at high temperatures, thermal expansion causes bolt connections to loosen, resulting in guiding errors and wear, which affects the stability and safety of the rolling production line.
The guide plate and liner are combined. A rigid heat insulation pad and a composite heat insulation layer, including alumina ceramic blocks and expanded perlite plates, are set between the liner and the guide plate to reduce the heat exchange area and use mirrored aluminum plates to reflect heat and prevent the guide plate from heating up.
It effectively prevents thermal expansion of the guide plate seat, ensures stable bolt connection, guarantees stable operation of the rolling production line, and reduces wear and downtime risks.
Smart Images
Figure CN223475923U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot rolling mechanism components, specifically to a rolling mill guide ruler protection mechanism. Background Technology
[0002] The function of the rolling mill guide ruler is to precisely guide the rolled steel billet to the center line, reduce strip deviation, lower the scrap rate, and improve rolling stability. Existing rolling mill guide rulers are directly fixed to the end of the hydraulic cylinder piston rod with bolts. The displacement of the guide rulers on both sides is achieved by the action of the hydraulic cylinder. In actual production, it has been found that because the steel billet in the hot rolling mill is in a scorching state, the rolling mill guide ruler, which is in frequent contact with the billet, will inevitably heat up as well. This heating causes thermal expansion of the material, resulting in a slight loosening of the bolt connection between the rolling mill guide ruler and the end of the hydraulic cylinder piston rod. When the loosened rolling mill guide ruler comes into contact with the billet again, it not only produces guiding errors but also accelerates the wear of the contact surface of the rolling mill guide ruler, which in severe cases can lead to the shutdown of the rolling production line. Utility Model Content
[0003] In view of the problems existing in the background art, the purpose of this utility model is to provide a rolling mill guide protection mechanism, which effectively solves the problems existing in the background art.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A rolling mill guide protection mechanism includes a guide seat and a liner. The guide seat has liner top screws at both ends, and a rigid heat insulation pad is placed between the end of the liner top screw and the liner. There is a gap between the liner and the guide seat, and two anchoring ribs are symmetrically arranged on the liner. Each anchoring rib includes an intermediate column fixed to the liner and an enlarged end column integrally mounted on the intermediate column. The intermediate column has a trapezoidal cross-section, and the enlarged end column has a circular cross-section. The guide seat has a trumpet groove that mates with the intermediate column and a circular groove that mates with the enlarged end column. Both the trumpet groove and the circular groove are vertical through grooves. The inner diameter of the circular groove is larger than the diameter of the enlarged end column. Multiple vertical ribs are evenly distributed circumferentially along the cross-section of the circular groove. The lower edge of the vertical ribs is flush with the lower edge of the circular groove, and the upper edge of the vertical ribs extends upwards beyond the circular groove.
[0006] Furthermore, the rigid heat insulation pad is made of alumina ceramic block.
[0007] Furthermore, a composite heat insulation layer is provided on the side of the guide ruler seat facing the liner plate. The composite heat insulation layer includes a heat insulation pad layer in contact with the guide ruler seat and a heat reflection layer disposed on the heat insulation pad layer.
[0008] Furthermore, the material of the heat insulation pad is expanded perlite board.
[0009] Furthermore, the heat reflective layer is made of mirrored aluminum plate.
[0010] This utility model has the following beneficial technical effects:
[0011] In this invention, a liner is mounted on the guide plate seat, which significantly reduces the heat exchange area between the liner and the guide plate seat. This avoids thermal expansion caused by the heating of the guide plate seat and subsequent unstable bolt connections, thus ensuring the stable operation of the rolling production line. Attached Figure Description
[0012] Figure 1 This is a top view of the working state of an embodiment of the present utility model;
[0013] Figure 2 This is a top view of an embodiment of the present utility model;
[0014] Figure 3 This is a front view of an embodiment of the present utility model. Detailed Implementation
[0015] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0016] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0017] like Figure 1-3As shown, the mill guide protection mechanism described in this embodiment includes a guide seat 1 and a liner 2. The left and right ends of the guide seat 1 are provided with liner top screws 3. Preferably, the liner 2 is provided with a blind hole for the liner top screw. A rigid heat insulation pad 4 is provided between the end of the liner top screw 3 and the blind hole for the liner top screw. The rigid heat insulation pad 4 is made of alumina ceramic block. The liner top screw 3 is subjected to small force and is not responsible for limiting the liner 2 in the horizontal direction. It is only responsible for limiting the movement of the liner 2 in the vertical direction. When the mill is running, the main force on the liner 2 is the horizontal thrust and friction.
[0018] There is a gap between the liner plate 2 and the guide ruler seat 1, and two anchoring columns are symmetrically arranged on the liner plate 2. The anchoring columns include an intermediate column 5 fixedly connected to the liner plate 2 and an enlarged end column 6 integrally set on the intermediate column 5. The material of the anchoring columns is the same as that of the liner plate 2. The cross-sectional shape of the intermediate column 5 is an isosceles trapezoid. The longer side of the parallel side of the isosceles trapezoid is connected to the enlarged end column 6, and the shorter side is connected to the liner plate 2. The cross-sectional shape of the enlarged end column 6 is a large circumferential circle. The guide ruler seat 1 is provided with a horn that cooperates with the intermediate column 5. The horn groove 7 and the circular groove 8 that mate with the enlarged end post 6 are both vertical through grooves. The inner diameter of the circular groove 8 is larger than the diameter of the enlarged end post 6, and the diameter of the enlarged end post 6 is larger than the maximum width of the horn groove 7. The enlarged end post 6 will not pass through the horn groove 7. There are also multiple vertical stiffeners 9 evenly distributed along the circumference of the cross-section inside the circular groove 8. The lower edge of the vertical stiffeners 9 is flush with the lower edge of the circular groove 8, and the upper edge of the vertical stiffeners 9 extends upward to the outside of the circular groove 8. Preferably, a rigid heat insulation pad can also be provided on the inner wall of the circular groove 8 and the horn groove 7.
[0019] To further reduce heat conduction between the liner 2 and the guide ruler seat 1 while maintaining a gap between them, a composite heat insulation layer is provided on the side of the guide ruler seat 1 facing the liner 2. The composite heat insulation layer includes a heat insulation pad 10 in contact with the guide ruler seat 1 and a heat reflection layer 11 disposed on the heat insulation pad 10. The heat insulation pad 10 is made of expanded perlite board, and the heat reflection layer 11 is made of mirror aluminum plate.
[0020] The working principle of this embodiment is as follows:
[0021] During installation, the liner 2 is first hung on the guide plate seat 1 through the anchoring column. When hanging, the anchoring column should be back. At this time, the middle column 5 and the enlarged end column 6 will cooperate with the larger trumpet groove 7 and the round groove 8, making the entry smoother. After the hanging is completed, the liner top screw 3 is installed. As the liner top screw 3 moves forward, the middle column 5 gradually moves forward into place and is locked in the trumpet groove 7. The enlarged end column 6 also contacts the inner front of the round groove 8. The liner 2 and the guide plate seat 1 are firmly engaged.
[0022] During production, the liner 2 is heated by the hot steel billet 12, and a small portion of the heat is transferred to the guide plate seat 1. The vertical rib plate 9 on the guide plate seat 1 can also dissipate the heat into the air. The vertically penetrating horn groove 7 and circular groove 8 also facilitate air flow, thereby cooling the guide plate seat 1 and preventing heat accumulation from affecting the connection of the bolt 14 between the rear side of the guide plate seat 1 and the end of the hydraulic cylinder piston rod 13. Compared with the prior art, in this embodiment, the liner 2 is installed on the guide plate seat 1, and the heat exchange area between the liner 2 and the guide plate seat 1 is significantly reduced, avoiding the thermal expansion caused by the heating of the guide plate seat 1 and the subsequent unstable connection of the bolt 14, thus ensuring the stable operation of the rolling production line.
[0023] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A rolling mill guide protection mechanism, characterized in that, The device includes a guide plate seat and a liner plate. The guide plate seat has liner plate set screws at both ends, and a rigid heat insulation pad is placed between the end of the set screw and the liner plate. There is a gap between the liner plate and the guide plate seat, and two anchoring ribs are symmetrically arranged on the liner plate. Each anchoring rib includes a middle column fixed to the liner plate and an enlarged end column integrally formed on the middle column. The middle column has a trapezoidal cross-section, and the enlarged end column has a circular cross-section. The guide plate seat has a flared groove that mates with the middle column and a circular groove that mates with the enlarged end column. Both the flared groove and the circular groove are vertical through grooves. The inner diameter of the circular groove is larger than the diameter of the enlarged end column. Multiple vertical stiffeners are evenly distributed circumferentially along the cross-section of the circular groove. The lower edge of the vertical stiffeners is flush with the lower edge of the circular groove, and the upper edge of the vertical stiffeners extends upwards beyond the circular groove.
2. The rolling mill guide protection mechanism according to claim 1, characterized in that, The rigid heat insulation pad is made of alumina ceramic block.
3. The rolling mill guide protection mechanism according to claim 1, characterized in that, The guide ruler seat is also provided with a composite heat insulation layer on the side facing the liner plate. The composite heat insulation layer includes a heat insulation pad layer in contact with the guide ruler seat and a heat reflection layer disposed on the heat insulation pad layer.
4. The mill guide protection mechanism according to claim 3, characterized in that, The insulation pad is made of expanded perlite board.
5. The mill guide protection mechanism according to claim 3, characterized in that, The heat reflective layer is made of mirrored aluminum plate.