Hot continuous rolling steel coil finish rolling outlet constant tension transmission device structure

Abstract

The utility model relates to the technical field of hot rolling coil production and manufacturing, in particular to a hot continuous rolling steel coil finish rolling outlet constant tension transmission device structure. According to the hot continuous rolling steel coil finish rolling outlet constant tension conveying device structure, the two sets of circulating constant tension mechanisms are symmetrically arranged on the two sides of the strip steel conveying roller between the finish rolling unit outlet and the coiling unit, and the multiple sets of electric clamping jaws installed on the circulating conveying belt at equal intervals are combined to provide stable tension for strip steel in turn; the conditions of wave shapes, thickness fluctuation, steel strip stacking and the like of steel coils can be effectively avoided, the product quality of hot continuous rolling of the steel strips can be greatly improved, and the production safety risk is reduced; the device is compact in overall structure, convenient to install and arrange, high in practicability and easy to popularize, and the electric clamping jaws can be telescopically adjusted, so that the device can be suitable for production of strip steel with various different widths.

Description

Technical Field

[0001] This utility model relates to the field of hot-rolled coil production and manufacturing technology, specifically to a constant tension transmission device structure for the finishing mill exit of hot continuous rolling steel coils. Background Technology

[0002] In traditional hot-rolled steel coils, the coil head and tail are tension-free during the approximately 150-meter process from the finishing mill exit to the coiler. After exiting the finishing mill, the coil is transported in a wavy pattern. At the moment the coiler clamps the head, the coil suddenly tensions, causing fluctuations in thickness. After the tail leaves the finishing mill exit, the coil loses tension, leading to uncoiled transport and potential coil stacking. The thickness of the coil also fluctuates suddenly at the moment of tension loss. The total impact on the head and tail is approximately 300 meters (about 37% of the entire coil). This phenomenon not only affects the coiling effect, causing tower-like structures and uneven coiling, but also, when the coil stacking is severe, may require machine shutdown and manual uncoiling, wasting production efficiency and posing risks to personnel and equipment.

[0003] Current technologies typically employ devices such as pinch rolls in the hot rolling stage to improve the coil shape. However, these devices can only constrain the wave pattern generated by the hot-rolled coil within a certain range and cannot provide a stable and constant tension for the hot-rolled coil during the production process, making it difficult to ensure the smooth and stable operation of the hot-rolled coil during production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a constant tension transmission device structure for the finishing mill exit of hot-rolled steel coils. The overall structure is compact and easy to install and arrange. It can maintain a certain constant tension of the hot-rolled coil from the finishing mill exit to the coiling process, thereby effectively avoiding the occurrence of waviness, thickness fluctuation, and steel strip stacking in the steel coil. It can significantly improve the product quality of hot-rolled steel strips and reduce production safety risks.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A constant tension transmission device structure for the finishing mill exit of hot continuous rolling steel coil mainly includes: two sets of circulating constant tension mechanisms 1 symmetrically installed on both sides of the conveying roller 4 between the exit end of the finishing mill 2 and the inlet end of the coiling mill 3 of the hot continuous rolling steel coil production line;

[0007] The circulating constant tension mechanism 1 includes a circulating conveyor belt 6 arranged parallel to the side of the strip 5. The two ends of the circulating conveyor belt 6 are respectively wound around the drive shaft 8 and the driven shaft 9, and the drive shaft 8 is connected to a circulating drive motor 7.

[0008] Multiple sets of retractable and adjustable electric grippers 10 are evenly installed at a preset distance on the outer surface of the circulating conveyor belt 6 at the same height as the strip steel 5. The electric grippers 10 are used to grip the traction strip steel 5 and provide it with stable constant tension.

[0009] Preferably, the electric gripper 10 includes two grippers 11 installed at one end of the electric drive gripping actuator 12, and the other end of the electric drive gripping actuator 12 is connected to the mounting base 14 through the telescopic adjustment mechanism 13. The electric gripper 10 is fixedly installed on the outer surface of the circulating conveyor belt 6 through the mounting base 14.

[0010] Preferably, by adjusting the telescopic adjustment mechanism 13, the spacing between the electric grippers 10 of the circulating constant tension mechanism 1 on both sides of the conveying roller 4 is adapted to the width of the strip 5.

[0011] Preferably, the gripping end of the chuck 11 is fitted with a protective sleeve 15 to prevent damage to the strip steel, and a photoelectric sensor 16 is installed on the bottom surface of the electrically driven gripping actuator 12.

[0012] Preferably, the electrically driven gripping actuator 12 includes sliders that are fixedly connected to two grippers 11 respectively. Both sliders are slidably mounted on a slide rail and are driven by a gripping motor to move along the slide rail to achieve gripping and releasing actions.

[0013] Preferably, the contactor terminal in the clamping motor used to switch the motor rotation direction is electrically connected to the signal output terminal of the photoelectric sensor 16.

[0014] Preferably, the drive shaft 8 is located at one end of the circulating constant tension mechanism 1 near the finishing mill 2, the driven shaft 9 is located at one end of the circulating constant tension mechanism 1 near the coiling mill 3, and the rotational speed of the circulating drive motor 7 matches the rotational speed of the conveying roller 4.

[0015] Preferably, a mill end reflector 17 adapted to the photoelectric sensor 16 is installed on the upper surface of the conveyor roller shaft at the outlet end of the finishing mill unit 2, which is located corresponding to the drive shaft 8.

[0016] A reflector plate 18 adapted to the photoelectric sensor 16 is installed on the upper surface of the conveyor roller shaft at the inlet end of the crimping unit 3, which is located corresponding to the driven shaft 9.

[0017] Compared with the prior art, the present invention has the following main advantages:

[0018] 1. The present invention provides a constant tension transmission device for hot strip mill exit of steel coil. By symmetrically arranging two sets of circulating constant tension mechanisms on both sides of the strip conveyor roller between the exit of the finishing mill and the coiling mill, and combining multiple sets of electric grippers installed at equal intervals on the circulating conveyor belt to provide stable tension to the strip, it can effectively avoid the occurrence of wavy shape, thickness fluctuation, and strip stacking of steel coil, which can significantly improve the product quality of hot strip mill and reduce production safety risks.

[0019] 2. This utility model has a compact overall structure, is easy to install and arrange, and the electric gripper is telescopic and adjustable, making it suitable for the production of strip steel of various widths. It is highly practical and easy to promote. Attached Figure Description

[0020] Figure 1 This is a plan view of the constant tension transmission device at the finishing mill exit of hot-rolled steel coil in an embodiment of this utility model;

[0021] Figure 2 This is a side view of the constant tension transmission device at the finishing mill exit of hot-rolled steel coil in an embodiment of this utility model.

[0022] Figure 3 This is a schematic diagram of a single electric gripper in an embodiment of this utility model.

[0023] In the diagram: 1-Circulating constant tension mechanism; 2-Finishing mill unit; 3-Coiling mill unit; 4-Transfer roller; 5-Strip steel; 6-Circulating conveyor belt; 7-Circulating drive motor; 8-Drive shaft; 9-Driven shaft; 10-Electric gripper; 11-Chuck; 12-Electric drive gripping actuator; 13-Telescopic adjustment mechanism; 14-Mounting base; 15-Anti-pinch protective sleeve; 16-Photoelectric sensor; 17-Finishing mill end reflector; 18-Coiling mill end reflector. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0029] This embodiment provides a constant tension conveying device for the finishing mill exit of hot-rolled steel coils, mainly used in the conveying stage of the finishing mill exit of hot-rolled billets in steel plants, such as... Figures 1-2 As shown, it mainly includes: two sets of circulating constant tension mechanisms 1, which are symmetrically installed on both sides of the conveyor rollers 4 between the exit end of the finishing mill 2 and the inlet end of the coiling mill 3 of the hot continuous rolling steel coil production line;

[0030] The circulating constant tension mechanism 1 includes a circulating conveyor belt 6 arranged parallel to the side of the strip 5. The two ends of the circulating conveyor belt 6 are respectively wound around the drive shaft 8 and the driven shaft 9, and the drive shaft 8 is connected to a circulating drive motor 7.

[0031] Multiple sets of retractable and adjustable electric grippers 10 are evenly installed at a preset distance on the outer surface of the circulating conveyor belt 6 at the same height as the strip steel 5. The electric grippers 10 are used to grip the traction strip steel 5 and provide it with stable constant tension.

[0032] In this embodiment, the total length of the circulating conveyor belt 6 is about 300m, and the single-side length of the circulating constant tension mechanism 1 is about 150m, so as to match the strip transmission distance between the outlet end of the finishing mill 2 and the inlet end of the coiling mill 3.

[0033] In this embodiment, the electric grippers 10 are provided in four groups, and each group of electric grippers is fixedly installed on the plane that is flush with the outer ring of the circulating conveyor belt 6 and the strip steel 5 at intervals of about 75m.

[0034] like Figure 3As shown, the electric gripper 10 includes two grippers 11 installed at one end of the electric drive gripping actuator 12, and the other end of the electric drive gripping actuator 12 is connected to the mounting base 14 through the telescopic adjustment mechanism 13. The electric gripper 10 is fixedly installed on the outer surface of the circulating conveyor belt 6 through the mounting base 14.

[0035] Furthermore, by adjusting the telescopic adjustment mechanism 13, the spacing between the electric grippers 10 of the circulating constant tension mechanism 1 on both sides of the conveying roller 4 is adapted to the width of the strip steel 5.

[0036] Furthermore, the gripping end of the chuck 11 is fitted with a protective sleeve 15 to prevent damage to the strip steel, and a photoelectric sensor 16 is installed on the bottom surface of the electrically driven gripping actuator 12.

[0037] Furthermore, the electrically driven gripping actuator 12 includes sliders that are fixedly connected to two grippers 11 respectively. Both sliders are slidably mounted on a slide rail and are driven by a gripping motor to move along the slide rail to achieve gripping and releasing actions.

[0038] Furthermore, the contactor terminal in the gripping motor used to switch the motor rotation direction is electrically connected to the signal output terminal of the photoelectric sensor 16. When the gripping motor receives the sensing signal from the photoelectric sensor 16, it switches the rotation direction of the motor to switch the clamping and releasing actions of the electric gripper.

[0039] Furthermore, the drive shaft 8 is located at one end of the circulating constant tension mechanism 1 near the finishing mill 2, the driven shaft 9 is located at one end of the circulating constant tension mechanism 1 near the coiling mill 3, and the rotational speed of the circulating drive motor 7 matches the rotational speed of the conveying roller 4.

[0040] Furthermore, a mill end reflector 17 adapted to the photoelectric sensor 16 is installed on the upper surface of the conveyor roller shaft at the outlet end of the finishing mill 2, which is located corresponding to the drive shaft 8.

[0041] A reflector plate 18 adapted to the photoelectric sensor 16 is installed on the upper surface of the conveyor roller shaft at the inlet end of the crimping unit 3, which is located corresponding to the driven shaft 9.

[0042] In practical use:

[0043] First, the distance between the electric grippers 10 of the two-sided circulating constant tension mechanism 1 is adjusted by the telescopic adjustment mechanism 13 to match the width of the strip 5, so that the chuck 11 can smoothly clamp the strip 5 when it is installed.

[0044] Then, turn on the circulating drive motor 7 of the two-sided circulating constant tension mechanism 1, so that the circulating conveyor belt 6 drives the electric gripper 10 on it to rotate along the strip steel conveying direction.

[0045] Next, when the first set of electric grippers 10 moves to directly above the reflector 17 at the finishing mill end, the photoelectric sensor 16 is triggered, causing the gripping motor to rotate forward and drive the chuck 11 to perform a clamping action, thereby clamping the strip steel 5 and providing it with tension; when the second set of electric grippers 10 moves to directly above the reflector 17 at the finishing mill end... when the first set of electric grippers 10 moves to directly above the reflector 18 at the coiling machine end, the photoelectric sensor 16 is triggered again, causing the gripping motor to rotate in reverse and drive the chuck 11 to perform a releasing action...; this cycle repeats, ensuring that the steel strip maintains a certain constant tension during its forward movement, thereby ensuring the smooth and stable transmission of the hot-rolled coil during the production process.

[0046] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0047] In summary:

[0048] 1. The present invention provides a constant tension transmission device for hot strip mill exit of steel coil. By symmetrically arranging two sets of circulating constant tension mechanisms on both sides of the strip conveyor roller between the exit of the finishing mill and the coiling mill, and combining multiple sets of electric grippers installed at equal intervals on the circulating conveyor belt to provide stable tension to the strip, it can effectively avoid the occurrence of wavy shape, thickness fluctuation, and strip stacking of steel coil, which can significantly improve the product quality of hot strip mill and reduce production safety risks.

[0049] 2. This utility model has a compact overall structure, is easy to install and arrange, and the electric gripper is telescopic and adjustable, making it suitable for the production of strip steel of various widths. It is highly practical and easy to promote.

[0050] The above embodiments are only used to illustrate the design concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The protection scope of this utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in this utility model are within the protection scope of this utility model.

Claims

1. A structure for a constant tension transmission device at the finishing mill exit of hot-rolled steel coils, characterized in that: Includes two sets of circulating constant tension mechanisms (1) symmetrically installed on both sides of the conveyor rollers (4) between the exit end of the finishing mill (2) and the inlet end of the coiling mill (3) of the hot continuous rolling steel coil production line; The circulating constant tension mechanism (1) includes a circulating conveyor belt (6) arranged parallel to the side of the strip (5), with the two ends of the circulating conveyor belt (6) respectively wound around the drive shaft (8) and the driven shaft (9), and the drive shaft (8) is connected to a circulating drive motor (7); Multiple sets of retractable and adjustable electric grippers (10) are evenly installed at a preset distance on the outer surface of the circulating conveyor belt (6) at the same height as the strip steel (5).

2. The structure of a constant tension transmission device at the finishing mill exit of a hot-rolled steel coil according to claim 1, characterized in that: The electric gripper (10) includes two grippers (11) installed at one end of the electric drive gripping actuator (12), and the other end of the electric drive gripping actuator (12) is connected to the mounting base (14) through the telescopic adjustment mechanism (13). The electric gripper (10) is fixedly installed on the outer surface of the circulating conveyor belt (6) through the mounting base (14).

3. The structure of a constant tension transmission device at the finishing mill exit of a hot-rolled steel coil according to claim 2, characterized in that: The spacing between the electric grippers (10) of the circulating constant tension mechanism (1) on both sides of the conveyor roller (4) is adapted to the width of the strip (5).

4. The structure of a constant tension transmission device at the finishing mill exit of a hot-rolled steel coil according to claim 2, characterized in that: The gripping end of the chuck (11) is fitted with a protective sleeve (15) to prevent damage to the strip steel, and a photoelectric sensor (16) is installed on the bottom surface of the electrically driven gripping actuator (12).

5. The structure of a constant tension transmission device at the finishing mill exit of a hot-rolled steel coil according to claim 4, characterized in that: The electrically driven gripping actuator (12) includes sliders that are fixedly connected to two grippers (11) respectively. Both sliders are slidably mounted on a slide rail and are driven by a gripping motor to move along the slide rail to achieve gripping and releasing actions.

6. The structure of a constant tension transmission device at the finishing mill exit of a hot-rolled steel coil according to claim 5, characterized in that: The contactor terminal in the clamping motor used to switch the direction of motor rotation is electrically connected to the signal output terminal of the photoelectric sensor (16).

7. The structure of a constant tension transmission device at the finishing mill exit of a hot-rolled steel coil according to claim 4, characterized in that: The drive shaft (8) is located at one end of the cyclic constant tension mechanism (1) near the finishing mill (2), the driven shaft (9) is located at one end of the cyclic constant tension mechanism (1) near the coiling mill (3), and the rotational speed of the cyclic drive motor (7) matches the rotational speed of the conveyor roller (4).

8. The structure of a constant tension transmission device at the finishing mill exit of a hot-rolled steel coil according to claim 7, characterized in that: A mill end reflector (17) adapted to the photoelectric sensor (16) is installed on the upper surface of the conveyor roller shaft at the outlet end of the finishing mill (2) corresponding to the drive shaft (8); A reflector plate (18) adapted to the photoelectric sensor (16) is installed on the upper surface of the conveyor roller shaft at the inlet end of the crimping unit (3) corresponding to the driven shaft (9).

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