High-efficiency straight rolling and hot delivery device

Abstract

This utility model discloses a high-efficiency direct rolling hot conveying device, based on PLC control, installed on a roller conveyor, including heat preservation covers, a lifting device, a rejection device, and a blocking device. Multiple heat preservation covers are installed on the roller conveyor, driven by the lifting device. A blocking device and a rejection device are installed at the end of the roller conveyor furthest from the heat preservation covers. Utilizing the roller conveyor with heat preservation covers and dynamic speed adjustment, the device effectively reduces the temperature drop of the billet during hot conveying, improves the temperature stability of the billet hot conveying, reduces energy consumption, and provides online temperature compensation and quality detection functions. It can promptly heat and compensate for billets with insufficient temperature and detect the billet quality in real time, ensuring that the billets entering the rolling mill are of qualified quality and improving the yield.

Description

Technical Field

[0001] This utility model relates to the field of hot rolling equipment technology, specifically to a high-efficiency direct rolling hot conveying device. Background Technology

[0002] In steel production, the traditional billet rolling process usually adopts the "cooling-reheating" mode. After continuous casting, the high-temperature billet is first air-cooled or slowly cooled to room temperature. Before subsequent rolling, it needs to be sent to a heating furnace for reheating to the rolling temperature. This process has significant defects. The billet loses about 1200-1300 MJ / t of heat energy during the cooling process (equivalent to 35-40 kg standard coal / t), while reheating requires an additional 250-300 kgce / t (coal equivalent) of energy, resulting in an increase of more than 30% in energy consumption per ton of steel. During the cooling and reheating process, a ≥0.5 mm thick iron oxide scale is generated on the surface of the billet, which forms pitting and indentation defects after rolling. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency direct rolling hot conveying device to solve the problem that the traditional billet rolling process usually adopts the "cooling-reheating" mode, in which the high-temperature billet after continuous casting is first air-cooled or slowly cooled to room temperature, and during the cooling and reheating process, the billet surface generates iron oxide scale ≥0.5mm thick, which forms pitting and pressing defects after rolling.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency direct rolling hot conveying device, based on PLC control, installed on a roller conveyor, including a heat preservation cover, a lifting device, a rejection device, and a blocking device. The roller conveyor is equipped with multiple heat-insulating covers, which are driven by a lifting device. A blocking device and a rejection device are installed at the end of the roller conveyor away from the heat-insulating covers. The lifting device, connected to the front and rear ends of the roller conveyor via a base, includes a connecting rod, a first support column, a second support column, and a sleeve. The first support column is located at the center of the top of the base, and the second support column is located at the right end. The sleeve is slidably fitted onto the second support column. One end of the connecting rod is hinged to the sleeve. The middle of the connecting rod is hinged to the first support column, and the other end is hinged to the rod-side cavity of the hydraulic cylinder. The rejection device is connected to the roller conveyor via a fixed base and includes a drive motor. The device comprises a gear, a guide housing, and a rack. A drive motor is installed inside the fixed base, and a gear is connected to the output end of the drive motor. A guide housing is provided on the outside of the gear, and a rack is provided inside the guide housing. A slot is opened in the guide housing corresponding to the position of the gear. The gear and the rack mesh with each other, and a rejection plate is connected to the top of the rack.

[0005] Preferably, the blocking device includes a connecting frame, a cylinder, and a blocking plate. The connecting frame is symmetrically arranged at the front and rear ends of the roller conveyor, and its top end is connected by a horizontal plate. A cylinder is connected to the horizontal plate, and the rod chamber of the cylinder passes through the horizontal plate. The top end of the cylinder is connected to the blocking plate.

[0006] Preferably, it also includes several induction heating plates symmetrically arranged at the front and rear ends of the roller conveyor, which are equidistantly distributed in the closed channel formed between the heat preservation cover and the roller conveyor.

[0007] Preferably, it also includes an infrared thermometer, which is equidistantly arranged on the roller conveyor and connected to the induction heating plate for signaling to raise the billet temperature to a suitable range.

[0008] Preferably, it also includes an online flaw detector and a plate shape detector, which are installed on the roller conveyor near the blocking device and are connected to the blocking device via a signal. They are used to detect the internal quality and external dimensions of the steel billet in real time and trigger the blocking action.

[0009] Preferably, the heat insulation cover is made of double-layer ceramic fiber material and filled with aluminum silicate insulation cotton.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. By utilizing roller conveyors with heat insulation covers and dynamic speed adjustment, the temperature drop of steel billets during hot conveying is effectively reduced, the temperature stability of hot conveying of steel billets is improved, and energy consumption is reduced.

[0011] 2. The online temperature compensation and quality inspection functions can promptly compensate for insufficient temperature in steel billets and detect the quality of steel billets in real time, ensuring that the quality of steel billets entering the rolling mill is qualified and improving the yield. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall top structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the lowering structure of the lifting device of this utility model.

[0014] Figure 3 This is a schematic diagram of the lifting structure of the lifting device of this utility model.

[0015] Figure 4 This is a schematic diagram of the rejection device of this utility model.

[0016] In the diagram: 1. Roller conveyor; 2. Insulation cover; 3. Lifting device; 301. Hydraulic cylinder; 302. Connecting rod; 303. First support column; 304. Second support column; 305. Sleeve; 4. Induction heating plate; 5. Rejection device; 501. Drive motor; 502. Gear; 503. Guide shell; 504. Rack; 505. Rejection plate; 6. Blocking device; 7. Cylinder; 8. Blocking plate. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] 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.

[0021] Example 1: Please refer to Figure 1-4 One embodiment of this utility model provides: a high-efficiency direct rolling hot conveying device, based on PLC control, installed on a roller conveyor 1, including a heat preservation cover 2, a lifting device 3, a rejection device 5, and a blocking device 6. Multiple heat-insulating covers 2 are installed on the roller conveyor 1. The heat-insulating covers 2 are made of double-layer ceramic fiber material and filled with aluminum silicate insulation cotton. They form a closed channel with the roller conveyor 1, isolating the steel billet from heat exchange with the external cold air, reducing the temperature drop of the steel billet during hot conveying, and improving the temperature stability of the steel billet during hot conveying. The heat-insulating covers 2 are driven by a lifting device 3. A blocking device 6 and a rejection device 5 are installed at the end of the roller conveyor 1 away from the heat-insulating covers 2. The lifting device 3 is connected to the front and rear ends of the roller conveyor 1 via a base and includes a connecting rod 302, a first support column 303, a second support column 304, and a sleeve 305. The first support column 303 is located at the center of the top of the base. The hinge point between the first support column 303 and the connecting rod 302 corresponds to the midpoint of the overall height of the second support column 304. The second support column 304 is located at the right end. The sleeve 305 is slidably fitted onto the second support column 304. Horizontally mounted mounting rods are connected to the sleeves 305 on both the left and right ends. Insulation covers 2 are connected between the corresponding end faces of the mounting rods. One end of the connecting rod 302 is hinged to the sleeve 305. The middle of the connecting rod 302 is hinged to the first support column 303, and the other end is hinged to the rod cavity of the hydraulic cylinder 301. The operation of the hydraulic cylinder 301 is prior art and will not be described in detail in this application. The connecting rod 302 and the first support column 303 are connected to the first support column 303. Bearings are installed at the hinge points of both support column 303 and the second support column 304. Hydraulic cylinder 301 serves as the drive unit of the lifting device 3. When the rod chamber of hydraulic cylinder 301 rises, it drives one end of connecting rod 302 to rise. Simultaneously, the middle of connecting rod 302, constrained by the first support column 303, causes it to deflect at an angle around the first support column 303, causing one end of connecting rod 302 located on sleeve 305 to deflect downwards. The connection end of connecting rod 302 and sleeve 305 rotates, synchronously causing sleeve 305 to slide downwards via the second support column 304, thus lowering the insulation cover 2. When the rod chamber of hydraulic cylinder 301 retracts, it drives the connecting rod 302, connected to the rod chamber, to descend and rotate around the hinge point of the first support column 303, causing the other end of connecting rod 302 to rise, simultaneously raising the insulation cover 2. It also includes an online flaw detector and a plate shape detector, which are installed on the roller conveyor 1 near the blocking device 6 and are signal-connected to the blocking device 6. These are used to detect the internal quality and external dimensions of the steel billet in real time and trigger the blocking action. The rejection device 5 is connected to the roller conveyor 1 via a fixed base and includes a drive motor 501, a gear 502, a guide shell 503, and a rack 504. The drive motor 501 is installed in the fixed base, and the output end of the drive motor 501 is connected to the gear 502. The gear 502 converts the rotational motion of the drive motor 501 into the linear motion of the rack 502. The guide shell 503 is provided on the outside of the gear 502, further limiting the direction of movement of the rack 502. The guide housing 503 has a rack 504, and a slot is opened in the guide housing 503 corresponding to the position of the gear 502. The gear 502 and the rack 504 mesh with each other. The top of the rack 504 is connected to a rejection plate 505. Driven by the rack 502, the defective billet is pushed laterally out of the roller conveyor 1. In the initial position, the rejection plate 505 is flush with the edge of the roller conveyor 1 and does not occupy the conveying position of the roller conveyor 1. The online flaw detector and the plate shape detector perform real-time detection on the internal quality and external dimensions of the billet. If a defective billet is detected, the signal is transmitted to the blocking device 6. The blocking device 6 blocks the billet and transmits the signal to the rejection device 5. At this time, the drive motor 501 drives the gear 502 to rotate. 2. The rack 504 is driven, and the rack 504 slides under the guidance of the guide shell 503, driving the rejection plate 505 to remove the unqualified steel billet from the roller conveyor 1 and collect it in the scrap trough. After the online flaw detector and the plate shape detector detect the rejection of the steel billet, they send a signal to the rejection device 5, causing the drive motor 501 to reverse and drive the rack 504 to reset to the initial position. The blocking device 6 includes a connecting frame, a cylinder 7, and a blocking plate 8. The connecting frame is symmetrically arranged on the front and rear ends of the roller conveyor 1, and its top is connected by a horizontal plate. The cylinder 7 is connected to the horizontal plate, and the rod chamber of the cylinder 7 passes through the horizontal plate. The top end of the cylinder is connected to the blocking plate 8. When the online flaw detector and the plate shape detector detect the unqualified steel billet, they send a signal to the cylinder 7, causing the cylinder 7 to move. The rod chamber of cylinder 7 extends, causing the baffle plate 8 to descend and block the unqualified steel billet. The billet is then removed into the scrap trough by the rejection device 5. The operation of cylinder 7 is existing technology and will not be elaborated upon in this application. The system also includes several induction heating plates 4 symmetrically arranged on both sides of the roller conveyor 1, equidistantly distributed within the sealed channel formed between the insulation cover 2 and the roller conveyor 1. An infrared thermometer is also included to monitor the surface temperature of the steel billet in real time. This thermometer works in conjunction with the induction heating plates 4, equidistantly arranged on the roller conveyor 1 and connected to the induction heating plates 4 via a signal connection. This allows the steel billet temperature to rise to a suitable range. When the infrared thermometer detects that the steel billet temperature is lower than a set value (900-950℃ depending on the steel grade), it transmits a signal to the control terminal of the induction heating plates 4, activating the induction heating plates 4 located on both sides of the roller conveyor.Rapid heating compensation is applied to the steel billet, with the induction heating power automatically adjusted based on the temperature difference to allow the billet temperature to rise back to a suitable range.

Claims

1. A high-efficiency direct rolling hot conveying device, based on PLC control, installed on a roller conveyor (1), characterized in that: It includes a heat insulation cover (2), a lifting device (3), a rejection device (5), and a blocking device (6). The roller conveyor (1) is equipped with multiple heat insulation covers (2), which are driven by a lifting device (3). A blocking device (6) and a rejection device (5) are provided at the end of the roller conveyor (1) away from the heat insulation cover (2). The lifting device (3) is connected to the front and rear ends of the roller conveyor (1) via a base and includes a connecting rod (302), a first support column (303), a second support column (304), and a sleeve (305). The first support column (303) is located at the middle of the top of the base, and the second support column (304) is located at the right end. The sleeve (305) is slidably fitted onto the second support column (304). One end of the connecting rod (302) is hinged to the sleeve (305). The middle part of the connecting rod (302) is hinged to the first support column (303), and the other end is hinged to the rod cavity of the hydraulic cylinder (301). The rejection device (5) is connected to the roller conveyor (1) via a fixed base and includes a drive motor (501). The gear (502), guide shell (503), and rack (504) are provided. A drive motor (501) is installed in the fixed base. The output end of the drive motor (501) is connected to the gear (502). A guide shell (503) is provided on the outside of the gear (502). A rack (504) is provided inside the guide shell (503). A slot is opened in the guide shell (503) corresponding to the position of the gear (502). The gear (502) and the rack (504) mesh with each other. A removal plate (505) is connected to the top of the rack (504).

2. The high-efficiency direct rolling hot conveying device according to claim 1, characterized in that: The blocking device (6) includes a connecting frame, a cylinder (7), and a blocking plate (8). The connecting frame is symmetrically arranged on the front and rear ends of the roller conveyor (1). Its top end is connected by a horizontal plate. The cylinder (7) is connected to the horizontal plate. The rod chamber of the cylinder (7) passes through the horizontal plate and the top end is connected to the blocking plate (8).

3. The high-efficiency direct rolling hot conveying device according to claim 1, characterized in that: It also includes several induction heating plates (4) symmetrically arranged at the front and rear ends of the roller conveyor (1), which are equidistantly distributed in the closed channel formed between the heat insulation cover (2) and the roller conveyor (1).

4. The high-efficiency direct rolling hot conveying device according to claim 1, characterized in that: It also includes an infrared thermometer, which is equidistantly set on the roller conveyor (1) and connected to the induction heating plate (4) to raise the billet temperature to a suitable range.

5. The high-efficiency direct rolling hot conveying device according to claim 1, characterized in that: It also includes an online flaw detector and a plate shape detector, which are set on the roller conveyor (1) near the blocking device (6) and are connected to the blocking device (6) by signal. They are used to detect the internal quality and external dimensions of the steel billet in real time and trigger the blocking action.

6. The high-efficiency direct rolling hot conveying device according to claim 1, characterized in that: The heat insulation cover (2) is made of double-layer ceramic fiber material and filled with aluminum silicate insulation cotton.

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