Finish rolling inlet side guide roller device of hot rolling strip rolling mill

Abstract

The utility model relates to the technical field of hot-rolled plate conveying, in particular to a hot-rolled plate strip rolling mill finish rolling inlet side guide roller device which comprises a guide and guard frame structure, three supporting tables are fixed on the upper side of the guide and guard frame structure, two guide rails are fixed among the three supporting tables, and a guide structure is arranged on the outer sides of the guide rails in a limiting and sliding mode. The guide structure comprises a sliding frame slidably arranged on the outer side of the guide rail, a guide plate is fixed to the upper side of the sliding frame, telescopic rods are fixed to the upper sides of the supporting tables located on the two sides, one end of each telescopic rod is hinged to the outer side of the guide plate, and a containing groove is formed in the upper side of the guide plate. The top end of the guide roller is provided with a fixed pressing plate fixed to the upper side of the guide plate through a fastening bolt. The utility model solves the problem that the existing bolts for fixing the roller bearing at the finish rolling inlet are difficult to detach or the problem that the roller is inconvenient to replace and maintain because the roller is arranged in a rolling mill housing.

Description

Technical Field

[0001] This utility model relates to the field of hot-rolled plate conveying technology, specifically to a guide roller device for the finishing mill inlet of a hot-rolled strip mill. Background Technology

[0002] In China, hot strip mills are adding roller devices to the entry side guides of their finishing mills to reduce strip edge scratching and improve the reliability of strip alignment within the finishing mill. Currently, several steel mills in China have added roller devices to the entry side guides of their finishing mills. However, due to structural and rotational inertia limitations, the roller devices are designed to be lightweight. Furthermore, because the roller devices operate continuously in a high-temperature and high-humidity environment, the roller bearings have a short lifespan, resulting in a high frequency of roller assembly replacement.

[0003] Currently, there are two arrangements of roller devices installed on the side guide at the entrance of the finishing mill in hot-rolled strip mills. One is the structure of the German SMS, in which a pair of rollers are installed at the junction of the trumpet section and the parallel section at the entrance of the side guide. The roller specifications are Φ185*500, and a pair of rollers are arranged symmetrically on each side. The other is the structure used by some hot-rolled plate plants in China, in which a roller is installed at the entrance and the middle part of the side guide. The roller specifications are Φ215*500 and Φ175*350 respectively, and they are arranged symmetrically on both sides.

[0004] The above two structural forms of the finishing mill inlet roller side guide device have the following problems during use: Both structural forms have certain limitations. In the SMS structure, the roller bearing seat is directly bolted to the side guide. After a period of use, the bolts are prone to loosening, elongation, or even breakage, and the bolts are difficult to disassemble, causing many inconveniences for use and maintenance. Although the structural forms of some hot rolling mills in China have solved the problems of bolt loosening and disassembly difficulties, the rollers arranged in the middle of the side guide are inside the mill stand, making replacement very difficult, which also causes inconvenience for maintenance. Utility Model Content

[0005] The technical problem this utility model aims to solve is that the bolts used to fix the roller bearings at the entrance of the finishing mill are difficult to remove, or that the rollers are located inside the mill stand, making replacement and maintenance inconvenient.

[0006] To solve the above problems, the technical solution adopted by this utility model is a guide roller device for the finishing entry side of a hot-rolled strip mill, including a guide frame structure (7), three support platforms (7.1) are fixed on the upper side of the guide frame structure (7), two guide rails (7.2) are fixed between the three support platforms (7.1), and a guide structure is provided on the outer side of the guide rails (7.2) for limiting sliding. The guide structure is characterized in that: the guide structure includes a sliding frame (8) slidably disposed on the outer side of the guide rails (7.2), a guide plate (9) is fixed on the upper side of the sliding frame (8), and telescopic rods (10) are fixed on the upper side of the support platforms (7.1) on both sides. One end of the telescopic rod (10) is hinged to the outer side of the guide plate (9). A placement groove is opened on the upper side of the guide plate (9), and a pair of roller assemblies are vertically arranged in the placement groove. A fixing pressure plate (1) is provided at the top of the guide roller and fixed to the upper side of the guide plate (9) by a clamping bolt (2).

[0007] As a further embodiment of this utility model: the roller assembly includes a roller shaft (5), the roller shaft (5) is made of high-strength low-alloy steel forging and is subjected to quenching and tempering heat treatment, the roller shaft (5) is provided with a roller body (6) on the outside, and bearings (4) are clamped at both ends between the roller shaft (5) and the roller body (6), and a positioning key (3) is clamped between the fixed pressure plate (1) and the guide plate (9). The roller assembly is provided with a dry oil lubrication system inside and a water cooling system is added on the outside.

[0008] As a further embodiment of this utility model: the outer side of the roller body (6) extends 10-20mm beyond one side of the guide plate (9), which can smoothly guide the strip head across the roller surface and prevent the strip head from getting stuck between the roller and the liner.

[0009] As a further embodiment of this utility model: the outer side of the roller body (6) is overlaid with high temperature resistant ceramic alloy steel to ensure that the roller surface will not anneal when heated, and the hardness reaches Rockwell hardness HRC60-62. The roller surface can withstand temperatures of over 800℃.

[0010] As a further embodiment of this utility model: a rolling mill (11) is provided on one side of the guide frame structure (7), and one end of the guide structure faces the entrance of the rolling mill (11).

[0011] Compared with the prior art, the advantages of this utility model are as follows: This patent adds a fixed pressure plate and roller assembly. When replacing the roller, several locking bolts on the fixed pressure plate can be directly removed, and the roller assembly together with the fixed pressure plate can be hoisted off the line. Then, the new roller assembly and its fixed pressure plate can be hoisted onto the line. After tightening the fixed pressure plate and locking bolts, the replacement can be completed. The replacement time can be controlled within 20 minutes, which greatly saves the time of replacing the roller assembly. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a front view of the overall structure of the guide roller device at the finishing entrance of a hot-rolled strip mill according to the present invention.

[0014] Figure 2 This is a diagram of the existing technology for the SMS structure of the inlet side guide in the finishing mill.

[0015] Figure 3 This is a diagram of the domestic structural form of the inlet side guide in the precision rolling mill in the existing technology.

[0016] Figure 4 This is a cross-sectional view of the roller assembly in the finishing inlet side guide roller device of a hot-rolled strip mill according to the present invention.

[0017] Figure 5 This is a top view schematic diagram of the overall structure of the guide roller device at the finishing entrance of a hot-rolled strip mill according to the present invention.

[0018] Figure 6 This is a front sectional view of the overall structure of the guide roller device at the finishing entrance of a hot-rolled strip mill according to the present invention.

[0019] Figure 7 This is a schematic diagram of the overall equipment installation position in the finishing inlet side guide roller device of a hot-rolled strip mill according to the present invention.

[0020] In the attached image:

[0021] 1. Fixed pressure plate; 2. Clamping bolt; 3. Positioning key; 4. Bearing; 5. Roller shaft; 6. Roller body; 7. Guide frame structure; 8. Sliding frame; 9. Guide plate; 10. Telescopic rod; 11. Rolling mill; 7.1. Support platform; 7.2. Guide rail. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides a technical solution to address the existing problems mentioned in the background art.

[0024] Combined with appendix Figure 1 ,3 -7, it can be seen that the guide frame structure (7) is included, three support platforms (7.1) are fixed on the upper side of the guide frame structure (7), two guide rails (7.2) are fixed between the three support platforms (7.1), and a guide structure is provided on the outer side of the guide rail (7.2) for limiting sliding. The guide structure is characterized in that: the guide structure includes a sliding frame (8) slidably disposed on the outer side of the guide rail (7.2), a guide plate (9) is fixed on the upper side of the sliding frame (8), and telescopic rods (10) are fixed on the upper side of the support platforms (7.1) on both sides, for pushing the sliding frame (8) and the guide plate (9) to move, so as to control the position between the two pairs of symmetrical roller assemblies. One end of the telescopic rod (10) is hinged to the outer side of the guide plate (9), a placement groove is opened on the upper side of the guide plate (9), a roller assembly is vertically disposed in the placement groove, and a fixed pressure plate (1) is fixed on the upper side of the guide plate (9) by means of a connecting bolt (2).

[0025] The roller assembly includes a roller shaft (5), which is made of high-strength low-alloy steel forging and subjected to quenching and tempering heat treatment. A roller body (6) is provided on the outside of the roller shaft (5). Bearings (4) are clamped at both ends between the roller shaft (5) and the roller body (6). A positioning key (3) is clamped between the fixed pressure plate (1) and the guide plate (9). The roller assembly is equipped with a dry oil lubrication system inside and a water cooling system is added on the outside. The outer side of the roller body (6) extends beyond the guide plate. (9) 10-20mm on one side, which can smoothly guide the strip head across the roller surface and avoid the strip head getting stuck between the roller and the liner; the outer side of the roller body (6) is overlaid with high temperature resistant ceramic alloy steel to ensure that the roller surface will not anneal when heated, and the hardness reaches Rockwell hardness HRC60-62. The roller surface can withstand temperatures of over 800℃; the guide frame structure (7) is provided with a rolling mill (11) on one side, and one end of the guide structure faces the entrance of the rolling mill (11).

[0026] The working principle of this application is as follows: the roller assembly is connected to the fixed pressure plate 1 by the center bolt, the fixed pressure plate (1) can be precisely positioned on the guide plate (9) by the positioning key 3, and the fixed pressure plate 1 is engaged with the guide plate (9) by the engaging bolt (2);

[0027] When replacing the roller assembly, simply remove a few clamping bolts 2 on the fixing plate 1. The roller assembly, along with the fixing plate 1, can be hoisted off the production line. Then, the new roller assembly and its fixing plate 1 can be hoisted back onto the production line. Once the fixing plate 1 and clamping bolts 2 are tightened, the replacement can be completed. The replacement time can be controlled within 20 minutes, greatly saving the time required to replace the roller assembly.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A hot-rolled plate strip mill finishing entry side guide roller device, comprising a guide frame structure (7), the upper side of the guide frame structure (7) is fixed with three support tables (7.1), two guide rails (7.2) are fixed between the three support tables (7.1), and a guide structure is slidably arranged on the outer side of the guide rail (7.2), characterized in that: The guiding structure comprises a sliding frame (8) slidingly arranged outside the guide rail (7.2), a guide plate (9) fixed to the upper side of the sliding frame (8), a telescopic rod (10) hingedly arranged on the upper side of each of the two support tables (7.1), one end of the telescopic rod (10) being hingedly connected to the outer side of the guide plate (9), a placing groove being formed in the upper side of the guide plate (9), and a pair of roller assemblies being vertically arranged in the placing groove; the top end of the guide roller is provided with a fixed pressing plate (1) fixed to the upper side of the guide plate (9) through a set screw (2).

2. A device for a finishing entry side guide roll of a hot strip rolling mill according to claim 1, characterized in that: The roller assembly comprises a roller shaft (5), a roller barrel (6) arranged outside the roller shaft (5), and bearings (4) arranged at both ends between the roller shaft (5) and the roller barrel (6); a positioning key (3) is arranged between the fixed pressing plate (1) and the guide plate (9).

3. A roughing-in entry side guide roll arrangement for a hot strip mill, as claimed in claim 2, wherein: The roller barrel (6) is arranged outside the guide plate (9) by 10-20 mm.

4. A roughing-in entry side guide roll arrangement for a hot strip rolling mill as claimed in claim 3, characterized in that: The outer side of the roller barrel (6) is stacked with high-temperature-resistant ceramic alloy steel.

5. A roughing-in entry side guide roll arrangement for a hot strip mill as defined in claim 1, characterized in that: The guide frame structure (7) is arranged beside a rolling mill (11), and one end of the guiding structure is directed to the entrance of the rolling mill (11).

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