Finishing mill and hot rolling production line
By designing a detachable and connected anti-flaking water header structure, the problem of easy damage to the header in the hot-rolled production line is solved, the rapid replacement of the header is achieved, and the surface quality of the strip is improved.
Patent Information
- Application Number
- CN202421043239.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In hot rolling production lines, anti-flaking water headers are prone to breakage under long-term high temperature baking, and the prior art is difficult to replace quickly, resulting in defects in peeling oxide films and affecting the surface quality of strip steel.
A finishing mill is designed, and its anti-flaking water header is removably connected between the first scraper and the second scraper for easy disassembly and replacement. When the header is cracked and leaked, the second scraper and anti-flaking water header are removed, and the first scraper and header are removed to achieve rapid replacement.
The rapid replacement of anti-flaking water header pipe is achieved, avoiding the peeling defect of oxide film caused by header damage, and improving the surface quality of the strip steel.
Smart Images
Figure CN222491531U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of steel rolling equipment, and specifically relates to a finishing mill and a hot rolling production line. Background Art
[0002] When producing hot-rolled strip, in order to prevent the oxide film on the surface of the working rolls in the front section of finishing rolling from peeling off, an anti-stripping water manifold is generally added to spray anti-stripping water on the strip surface to cool the strip surface, prevent scalding of the roll surface, and reduce the heat conducted to the roll, thereby reducing the oxidation rate of the roll surface and achieving the purpose of reducing the oxide film thickness.
[0003] However, the anti-stripping water headers at the entrance of the rolling mill are prone to cracking and leaking when they are baked for a long time. The anti-stripping water is easily oxidized. In the prior art, the anti-stripping water headers are fixedly connected to the front section of the finishing mill and are difficult to disassemble and replace. If the damaged anti-stripping headers are not replaced in time, the oxidized anti-stripping water will act on the strip, which will affect the formation of an oxide film on the surface of the strip. Due to the temperature difference between the core and the surface of the strip and the further influence of the side spray cooling device on the surface temperature of the strip, the oxide film on the surface of the strip will peel off after the cooling effect of laminar cooling, forming a surface oxide film peeling defect, affecting the surface quality of the strip. Summary of the invention
[0004] In order to solve the technical problems that the anti-stripping headers on the current hot rolling production line are baked at high temperature for a long time, are easily damaged, and are difficult to replace, the present application provides a finishing mill and a hot rolling production line.
[0005] In a first aspect of the present application, there is provided a finishing mill, comprising a finishing mill body and an anti-stripping water header;
[0006] The finishing mill body comprises a working roll and a first scraper close to the working roll, wherein the first scraper is arranged obliquely and is arranged at the front end of the working roll along the running direction of the strip;
[0007] The anti-stripping water manifold is detachably connected to the first scraper and is close to the working roll. The pipe mouth of the anti-stripping water manifold faces the strip steel. The anti-stripping water manifold is detachably connected to the second scraper, and the end of the second scraper is in contact with the roll surface of the working roll.
[0008] In some embodiments, the anti-stripping water header includes a main pipe and a sub-pipe connected to the main pipe, the main pipe is bolted to the first scraper, and the bolt ends are located in the main pipe.
[0009] In some embodiments, the bolt is connected with a plurality of nuts.
[0010] In some embodiments, the sub-pipe includes a plurality of nozzles disposed at intervals, and a protective member is disposed on an outer sleeve of the nozzle, and the protective member is connected to the first scraper bolt.
[0011] In some embodiments, a positioning key is provided between the protective member and the first scraper.
[0012] In some embodiments, a support is connected to one end of the first scraper close to the working roll, and the support is detachably connected to the protective member.
[0013] In some embodiments, one end of the protection member is detachably connected to the support and the main pipe, and the other end is detachably connected to the second scraper.
[0014] In some embodiments, the first scraper is provided with a pipe clamp, and the pipe clamp is sleeved on the main pipe to limit the radial position of the main pipe.
[0015] In some embodiments, a flange is provided at one end of the main pipe away from the working roll.
[0016] In a second aspect of the present application, a hot rolling production line is provided, comprising the finishing mill.
[0017] The finishing mill provided according to the embodiment of the present application includes a finishing mill body and an anti-stripping water manifold; the finishing mill body includes a working roll and a first scraper close to the working roll, the first scraper is inclined and is arranged at the front end of the working roll along the running direction of the strip; the anti-stripping water manifold is detachably connected to the first scraper and is close to the working roll, the pipe mouth of the anti-stripping water manifold faces the strip, and the anti-stripping water manifold is detachably connected to the second scraper, and the end of the second scraper is in contact with the roll surface of the working roll.
[0018] Compared with the prior art, the anti-stripping water manifold provided in the present application is detachably connected to the first scraper and the second scraper, and is located between the first scraper and the second scraper, so as to be easily disassembled from the first scraper and the second scraper. When the anti-stripping water manifold cracks and leaks under long-term high-temperature baking, the anti-stripping water manifold can be quickly replaced by disassembling the second scraper and the anti-stripping water manifold, and then disassembling the first scraper and the anti-stripping water manifold. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A structural side view showing an anti-stripping water header installed on a first scraper according to an embodiment of the present application is shown.
[0020] Figure 2 Shows Figure 1 Enlarged view of point A in the middle.
[0021] Figure 3 A front view of the structure in which the anti-stripping water header according to an embodiment of the present application is installed on the first scraper is shown.
[0022] Description of reference numerals:
[0023] 100, first scraper;
[0024] 200. Anti-stripping water header;
[0025] 210, protective part; 220, main pipe; 230, auxiliary pipe; 240, nozzle; 250, support;
[0026] 300. Second scraper. DETAILED DESCRIPTION
[0027] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0028] The first embodiment of the present application provides a finishing mill to facilitate replacement of the anti-stripping water header 200 .
[0029] See also Figure 1 as well as Figure 3 , the finishing mill provided in the embodiment of the present application comprises a finishing mill body and an anti-stripping header;
[0030] The finishing mill body includes a working roll and a first scraper 100 close to the working roll. The first scraper 100 is tilted and arranged at the front end of the working roll along the running direction of the strip. In some embodiments, the first scraper 100 is arranged at the inlet end of the working roll.
[0031] The anti-stripping water manifold 200 is detachably connected to the first scraper 100 and is close to the working roll. The pipe mouth of the anti-stripping water manifold 200 faces the strip steel. The anti-stripping water manifold 200 is detachably connected to the second scraper 300. The end of the second scraper 300 is attached to the roller surface of the working roll to facilitate the replacement of the anti-stripping water manifold 200. In some embodiments, the anti-stripping water manifold 200 is bolted to the first scraper 100. In some embodiments, the anti-stripping water manifold 200 is bolted to the second scraper 300.
[0032] In some embodiments, the top of the first scraper 100 is connected to the anti-stripping water manifold 200, and the top of the anti-stripping water manifold 200 is connected to the second scraper 300. The first scraper 100 and the second scraper 300 are combined to form a scraper plate. The end of the second scraper 300 is in contact with the working roll, and the scraper plate acts on the working roll. A cooling water manifold is provided at the other end of the working roll. The cooling water manifold sprays cooling water to the working roll to cool the working roll. The second scraper 300 makes the sprayed cooling water evenly cover the working roll to make the working roll evenly cooled. In some embodiments, the pipe mouth of the anti-stripping water manifold 200 is located below the second scraper 300; in some embodiments, the first scraper 100, the second scraper 300 and the anti-stripping water manifold 200 are all arranged at the inlet end of the working roll. In some embodiments, the pipe mouth of the anti-stripping water manifold 200 faces the strip steel.
[0033] In some embodiments, the anti-stripping water collection pipe 200 includes a main pipe 220 and a sub-pipe 230 connected to the main pipe 220. The main pipe 220 is bolted to the first scraper 100, and the end of the bolt is located in the main pipe 220. Compared with passing through the main pipe 220, the main pipe 220 can be prevented from leaking. In some embodiments, the main pipe 220 is an inlet pipe connected to the sub-pipe 230. In some embodiments, the main pipe 220 is bolted to the first scraper 100 at one end near the sub-pipe 230. In some embodiments, the main pipe 220 is located above the first scraper 100.
[0034] See also Figure 2 In some embodiments, the bolts are connected with a plurality of nuts to further increase the connection stability. In some embodiments, the main pipe 220 is bolted to the first scraper 100 at one end near the auxiliary pipe 230, and each bolt is connected with two nuts. In some embodiments, each bolt is connected with three nuts.
[0035] In some embodiments, the auxiliary pipe 230 includes a plurality of nozzles 240 arranged at intervals, and a protective member 210 is provided on the outer cover of the nozzle 240. The protective member 210 is bolted to the first scraper 100 to protect the nozzle 240. In some embodiments, the cross-section of the protective member 210 is Z-shaped. In some embodiments, the protective member 210 is bolted to the first scraper 100 at one end away from the working roller.
[0036] In some embodiments, a positioning key is provided between the protective member 210 and the first scraper 100 to increase installation stability. In some embodiments, the bottom end of the protective member 210 and the top end of the first scraper 100 are positioned by the positioning key and then connected by bolts.
[0037] In some embodiments, a support 250 is connected to one end of the first scraper 100 near the working roller, and the support 250 is detachably connected to the protective member 210 so that the structure of the first scraper 100 and the protective member 210 fits together. In some embodiments, the protective member 210 is located at the top of the support 250. In some embodiments, the support 250 is L-shaped.
[0038] In some embodiments, one end of the protective member 210 is detachably connected to the support 250 and the main pipe 220, and the other end is detachably connected to the second scraper 300, so as not to affect the wiping effect of the wiper when the anti-stripping water collection pipe 200 is installed; in some embodiments, one end of the protective member 210 is connected to the main pipe 220 and the support 250 by bolts, and the main pipe 220, the protective member 210, and the support 250 are arranged in sequence from top to bottom, and the other end is bolted to the second scraper 300, and the second scraper 300 is located at the top of the protective member 210.
[0039] In some embodiments, the first scraper 100 is provided with a pipe clamp, which is sleeved on the main pipe 220 to radially limit the main pipe 220 and increase the stability of the device. In some embodiments, a plurality of pipe clamps are provided and are arranged at intervals along the extension direction of the main pipe 220. In some embodiments, the pipe clamp is connected to the first scraper 100 and sleeved on the main pipe 220 to connect the main pipe 220 to the first scraper 100.
[0040] In some embodiments, a flange is provided at one end of the main pipe 220 away from the working roll to connect to a water source. In some embodiments, a flange is provided at the top of the main pipe 220 .
[0041] A second aspect of the present application provides a hot rolling production line to facilitate replacement of the anti-stripping water header 200 .
[0042] The hot rolling production line provided in the embodiment of the present application includes a finishing mill to facilitate replacement of the anti-stripping water header 200;
[0043] In some embodiments, the hot rolling production line includes a rough rolling mill group and a finishing rolling mill group which are arranged in sequence according to the process.
[0044] The replacement process of the anti-stripping water header 200 of the finishing mill and hot rolling production line of the present application is described in detail below:
[0045] When the anti-stripping water manifold 200 is baked at high temperature for a long time and cracks and leaks, the bolts between the second scraper 300 and the anti-stripping water manifold 200 are removed, and then the bolts between the first scraper 100 and the anti-stripping water manifold 200 are removed. After the anti-stripping water manifold 200 is removed, the entire section can be replaced to achieve rapid replacement of the anti-stripping water manifold 200.
[0046] The finishing mill and hot rolling production line of the present application have at least the following advantages:
[0047] (1) The anti-stripping water manifold provided in the present application is detachably connected to the first scraper and the second scraper, and is located between the first scraper and the second scraper, so as to be easily disassembled from the first scraper and the second scraper. When the anti-stripping water manifold cracks and leaks under long-term high-temperature baking, the second scraper and the anti-stripping water manifold are disassembled, and then the first scraper and the anti-stripping water manifold are disassembled, so that the anti-stripping water manifold can be quickly replaced.
[0048] (2) The first scraper of the present application is provided with a pipe clamp, which is sleeved on the main pipe to limit the radial position of the main pipe and increase the stability of the device.
[0049] (3) The bolt connection between the main pipe, the protective member and the support of the present application has multiple nuts, which further increases the stability of the connection.
[0050] (4) A positioning key is provided between the protective member and the first scraper of the present application to increase installation stability.
[0051] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0053] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0054] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0055] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A finishing mill, characterized in that: include: The finishing mill body comprises a working roll and a first scraper close to the working roll, wherein the first scraper is arranged obliquely and is arranged at the front end of the working roll along the running direction of the strip; The anti-stripping water manifold is detachably connected to the first scraper and is close to the working roll. The pipe mouth of the anti-stripping water manifold faces the strip steel. The anti-stripping water manifold is detachably connected to the second scraper, and the end of the second scraper is in contact with the roll surface of the working roll.
2. The finishing mill according to claim 1, characterized in that: The anti-stripping water header includes a main pipe and a sub-pipe connected to the main pipe, the main pipe is connected to the first scraper bolt, and the bolt end is located in the main pipe.
3. The finishing mill according to claim 2, characterized in that: The bolts are connected with a plurality of nuts.
4. The finishing mill according to claim 2, characterized in that: The auxiliary pipe includes a plurality of nozzles arranged at intervals, and a protective member is disposed on the outer sleeve of the nozzle, and the protective member is connected to the first scraper bolt.
5. The finishing mill according to claim 4, characterized in that A positioning key is provided between the protective member and the first scraper.
6. The finishing mill according to claim 4, characterized in that The first scraper is connected to a support at one end close to the working roll, and the support is detachably connected to the protective member.
7. The finishing mill according to claim 6, characterized in that One end of the protection member is detachably connected to the support and the main pipe, and the other end is detachably connected to the second scraper.
8. The finishing mill according to any one of claims 2 to 7, characterized in that: The first scraper is provided with a pipe clamp, and the pipe clamp is sleeved on the main pipe to limit the radial position of the main pipe.
9. The finishing mill according to any one of claims 2 to 7, characterized in that: A flange is provided at one end of the main pipe away from the working roll.
10. A hot rolling production line, characterized in that: It comprises a finishing mill as claimed in any one of claims 1 to 9.