A heating furnace for mixed loading of hot and cold billets

Abstract

This utility model relates to the field of heating furnace technology, specifically a heating furnace capable of mixing hot and cold billets, comprising: a feeding roller conveyor, on which a first heating furnace, a second heating furnace, and a third heating furnace are arranged sequentially from left to right; an isolation chamber is fixedly installed on the feeding roller conveyor between the first, second, and third heating furnaces; a chute is provided on the first, second, and third heating furnaces, respectively, directly above the inlet and outlet; a baffle is slidably connected in each of the two chutes; and slide rails are provided on both sides of the chutes, with both ends of the baffles extending into the corresponding slide rails, ensuring that the steel billets can be heated in sections, and that the temperature in the first, second, and third heating furnaces can be precisely controlled to ensure uniform heating of the steel billets and greatly improve the mechanical properties of the steel billets.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, specifically a heating furnace that can mix cold and hot billets. Background Technology

[0002] The standard for controlling the temperature of the heating furnace, the temperature uniformity of the billet exiting the furnace, and the temperature difference of the billet have always been key indicators affecting the mechanical properties of the final product, and are also difficult points to control in the steel production process.

[0003] Traditional heating furnaces often suffer from problems such as insufficient raw material temperature upon exiting the furnace to meet rolling requirements, and excessively high billet temperatures when charging in a fully hot furnace mode, leading to reduced product mechanical properties. Furthermore, in a mixed cold-hot charging mode, the cold billets exiting the furnace are too cold to meet rolling temperature requirements, necessitating a shutdown and heat preservation process. Meanwhile, the hot billets are at a higher temperature, resulting in substandard overall product performance. Therefore, we propose a heating furnace capable of mixing cold and hot billets. Summary of the Invention

[0004] The purpose of this invention is to provide a heating furnace that can mix hot and cold billets, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A heating furnace capable of mixing hot and cold billets, comprising:

[0007] The feeding roller conveyor has a first heating furnace, a second heating furnace, and a third heating furnace arranged sequentially from left to right. Isolation chambers are fixedly installed on the feeding roller conveyor between the first heating furnace, the second heating furnace, and the third heating furnace. Slide grooves are opened on the first heating furnace, the second heating furnace, and the third heating furnace, respectively, directly above the inlet and outlet. Baffles are slidably connected in both slide grooves. Slide rails are opened on both sides of the slide grooves. The two ends of the baffles extend into the corresponding slide rails. Burners and the main body of a gas calorific value analyzer are fixedly installed on the top of the inner cavity of the first heating furnace, the second heating furnace, and the third heating furnace.

[0008] Three sets of drive components are located in the first heating furnace, the second heating furnace, and the third heating furnace, respectively, and are used to drive the two baffles to rise and fall.

[0009] Preferably, the driving component includes:

[0010] A threaded rod is rotatably installed in one of the slide rails. A rectangular groove is provided in the feed roller conveyor and directly above one of the slide rails. The top of the threaded rod extends through the baffle and the top of the slide rail into the rectangular groove and is fixedly installed with a bevel gear. A bevel gear is meshed in the rectangular groove and on one side of the bevel gear.

[0011] A rectangular groove two is formed within the feed roller conveyor and located between two rectangular grooves one. A motor is meshed and installed on one side of the first heating furnace. The output shaft of the motor passes through one side of the feed roller conveyor and is fixedly installed with a connecting shaft two. One end of the connecting shaft two extends into the rectangular groove two and is fixedly installed with a bevel gear four. Two bevel gears three are meshed and installed within the rectangular groove two and on both sides of the bevel gear four. A connecting shaft one connects the bevel gear three to the corresponding bevel gear two.

[0012] Preferably, the threaded rod is threadedly connected to the baffle, the second bevel gear and the first bevel gear are rotatably connected to the first rectangular groove, the two third bevel gears and the fourth bevel gear are rotatably connected to the second rectangular groove, and the two connecting shafts, the second connecting shaft and the output shaft of the motor are rotatably connected to the first heating furnace.

[0013] Preferably, a pyrometer is fixedly installed on the top of the feed roller conveyor and in the first heating furnace, the second heating furnace and the third heating furnace respectively.

[0014] Preferably, a storage battery is fixedly installed in the first, second, and third heating furnaces, and the storage battery is electrically connected to the burner.

[0015] Preferably, the baffle is slidably connected to the slide rail.

[0016] Preferably, the first heating furnace, the second heating furnace, and the third heating furnace are made of high-temperature resistant refractory bricks.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This heating furnace, capable of mixing hot and cold billets, ensures segmented heating of steel billets through the coordinated operation of a first heating furnace, a second heating furnace, a third heating furnace, a chute, a slide rail, a baffle, an isolation chamber, a pyrometer, a burner, a gas calorific value analyzer, and a drive assembly. Simultaneously, it allows for precise temperature control within the first, second, and third heating furnaces, guaranteeing uniform heating of the steel billets and significantly improving their mechanical properties. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2This is a cross-sectional structural diagram of the first heating furnace, the second heating furnace, and the third heating furnace in this utility model;

[0021] Figure 3 This is a partial structural diagram of the present invention;

[0022] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A;

[0023] Figure 5 This is an enlarged structural diagram of point B in part 3 of this utility model.

[0024] In the diagram: 1. Feed roller conveyor; 2. First heating furnace; 3. Second heating furnace; 4. Third heating furnace; 5. Slide chute; 6. Slide rail; 7. Threaded rod; 8. Rectangular groove one; 9. Bevel gear one; 10. Bevel gear two; 11. Connecting shaft one; 12. Rectangular groove two; 13. Bevel gear three; 14. Bevel gear four; 15. Connecting shaft two; 16. Motor; 17. Baffle; 18. Isolation chamber; 19. High temperature meter; 20. Burner; 21. Gas calorific value analyzer body. Detailed Implementation

[0025] 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.

[0026] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] Please see Figures 1-5 As shown, this utility model provides a technical solution:

[0028] A heating furnace capable of mixing hot and cold billets, comprising:

[0029] A feeding roller conveyor 1 is provided, on which a first heating furnace 2, a second heating furnace 3, and a third heating furnace 4 are arranged sequentially from left to right. Isolation chambers 18 are fixedly installed on the feeding roller conveyor 1 between the first heating furnace 2, the second heating furnace 3, and the third heating furnace 4. Slide grooves 5 are provided on the first heating furnace 2, the second heating furnace 3, and the third heating furnace 4, respectively, directly above the inlet and outlet. Baffles 17 are slidably connected within each slide groove 5. Slide rails 6 are provided on both sides of each slide groove 5, and both ends of the baffles 17 extend into the corresponding slide rails 6. Burners 20 and the main body of a gas calorific value analyzer 21 are fixedly installed on the top of the inner cavity and the top of the first heating furnace 2, the second heating furnace 3, and the third heating furnace 4, respectively. Three sets of drive components are located within the first heating furnace 2, the second heating furnace 3, and the third heating furnace 4, and are used to drive the two baffles 17 to rise and fall, thus heating the cold billets. Alternatively, the hot billet is conveyed to the feed inlet of the first heating furnace 2 by the feed roller conveyor 1. The drive assembly on the first heating furnace 2 is started, and the drive assembly drives the baffle 17 to slide upward along the slide rail 6, opening the feed inlet of the first heating furnace 2, and the cold billet enters the furnace. At this time, the burner 20 of the first heating furnace 2 is started and heated at the set power. The gas calorific value analyzer body 21 monitors the calorific value of the gas and adjusts the air-fuel ratio to the optimal state. After the cold billet reaches the preset temperature in the first heating furnace 2, the motor 16 on the first heating furnace 2 is started again, thereby opening the two discharge port baffles 17 of the first heating furnace 2. The billet is sent into the first isolation chamber 18 by the feed roller conveyor 1. The separation structure of the isolation chamber 18 can reduce the heat leakage when the feed inlet or discharge port of the heating furnace is opened, and buffer the heating operation of the billet in the furnace. Subsequently, the above operation is repeated to start the first heating furnace 2 and the second heating furnace 3 in sequence, and finally the homogenization is completed in the third heating furnace 4.

[0030] In this embodiment, the driving component includes:

[0031] A threaded rod 7 is rotatably mounted within one of the slide rails 6. A rectangular slot 8 is formed within the feed roller conveyor 1, directly above one of the slide rails 6. The top of the threaded rod 7 extends through the baffle 17 and the top of the slide rail 6 into the rectangular slot 8, where a bevel gear 9 is fixedly mounted. A bevel gear 10 is meshed within the rectangular slot 8, on one side of the bevel gear 9. A rectangular slot 12 is formed within the feed roller conveyor 1, between the two rectangular slots 8. A motor 16 is meshed on one side of the first heating furnace 2. The output shaft of the motor 16 extends through one side of the feed roller conveyor 1 and is fixedly mounted with a connecting shaft 15. One end of the connecting shaft 15 extends into the rectangular slot 12 and is fixedly mounted with a bevel gear 4. 14. Two bevel gears 13 are installed in rectangular slot 2 12 and meshing on both sides of bevel gear 4 14. A connecting shaft 11 connects bevel gear 3 13 and the corresponding bevel gear 2 10. When the motor 16 on the first heating furnace 2 is started, the output shaft of the motor 16 rotates and drives the connecting shaft 2 15 to rotate. The connecting shaft 2 15 drives bevel gear 4 14 in rectangular slot 2 12 to rotate. Bevel gear 4 14 meshes with bevel gear 3 13 on both sides and is transmitted to bevel gear 2 10 in rectangular slot 1 8 through connecting shaft 11. Bevel gear 2 10 meshes with bevel gear 1 9 and finally drives threaded rod 7 to rotate. When threaded rod 7 rotates, baffle 17 slides upward along slide rail 6 and opens the feed port of the first heating furnace 2, allowing cold billet to enter the furnace.

[0032] In this embodiment, the threaded rod 7 is threadedly connected to the baffle 17, the bevel gear 2 10 and bevel gear 1 9 are rotatably connected to the rectangular slot 1 8, the two bevel gears 3 13 and bevel gear 4 14 are rotatably connected to the rectangular slot 2 12, the two connecting shafts 1 11, the connecting shaft 2 15 and the output shaft of the motor 16 are rotatably connected to the first heating furnace 2. Under the action of the thread, the rotating threaded rod 7 drives the baffle 17 to move, ensuring that the bevel gear 2 10 and bevel gear 1 9 can rotate in the rectangular slot 1 8, ensuring that the bevel gear 3 13 and bevel gear 4 14 can rotate in the rectangular slot 2 12, ensuring that the connecting shaft 1 11 and the connecting shaft 2 15 can rotate in the first heating furnace 2, and ensuring that the motor 16 can operate normally on the first heating furnace 2.

[0033] In this embodiment, a high temperature gauge 19 is fixedly installed on the top of the feed roller conveyor 1 and in the first heating furnace 2, the second heating furnace 3 and the third heating furnace 4 respectively. The high temperature gauge 19 detects the initial temperature of the cold billet and transmits the data to the control system. The control system determines the target temperature of the cold billet.

[0034] In this embodiment, batteries are fixedly installed in the first heating furnace 2, the second heating furnace 3, and the third heating furnace 4. The batteries are electrically connected to the burner 20, and the batteries ensure that the burner 20 can be continuously supplied with power.

[0035] In this embodiment, the baffle 17 is slidably connected to the slide rail 6 to ensure that the baffle 17 can slide within the slide rail 6.

[0036] In this embodiment, the first heating furnace 2, the second heating furnace 3, and the third heating furnace 4 are made of high-temperature resistant refractory bricks to ensure that the first heating furnace 2, the second heating furnace 3, and the third heating furnace 4 can withstand huge high temperatures.

[0037] In this embodiment, a heating furnace capable of mixing cold and hot billets is used such that the cold or hot billets to be heated are conveyed to the feed inlet of the first heating furnace 2 by the feed roller conveyor 1. The pyrometer 19 detects the initial temperature of the cold billet and transmits the data to the control system. The control system starts the motor 16 on the first heating furnace 2 according to the target temperature of the cold billet. The output shaft of the motor 16 rotates, which drives the second connecting shaft 15 to rotate. The second connecting shaft 15 drives the fourth bevel gear 14 in the second rectangular slot 12 to rotate. The fourth bevel gear 14 meshes with the third bevel gear 13 on both sides and is transmitted to the second bevel gear 10 in the first rectangular slot 8 via the first connecting shaft 11. The second bevel gear 10 meshes with the first bevel gear 9 and finally drives the threaded rod 7 to rotate. When the threaded rod 7 rotates, the baffle 17 slides upward along the slide rail 6, opening the feed inlet of the first heating furnace 2 and allowing the cold billet to enter the furnace.

[0038] At this time, the burner 20 of the first heating furnace 2 is started and heated at the set power. The gas calorific value analyzer body 21 monitors the calorific value of the gas and adjusts the air-fuel ratio to the optimal state. After the cold billet reaches the preset temperature in the first heating furnace 2, the motor 16 on the first heating furnace 2 is started again, thereby opening the two discharge port baffles 17 of the first heating furnace 2. The billet is fed into the first isolation chamber 18 by the feed roller 1. The partition structure of the isolation chamber 18 can reduce the heat leakage when the feed port or discharge port of the heating furnace is opened, and buffer the heating operation of the billet in the furnace. Then, the above operation is repeated to start the first heating furnace 2 and the second heating furnace 3 in sequence, and finally the homogenization is completed in the third heating furnace 4.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A heating furnace capable of mixing hot and cold billets, characterized in that: include: Feed roller conveyor (1), from left to right, is provided with a first heating furnace (2), a second heating furnace (3) and a third heating furnace (4). An isolation chamber (18) is fixedly installed on the feed roller conveyor (1) between the first heating furnace (2), the second heating furnace (3) and the third heating furnace (4). A chute (5) is provided on the first heating furnace (2), the second heating furnace (3) and the third heating furnace (4) respectively, and is located directly above the feed inlet and the discharge outlet. A baffle (17) is slidably connected in both chute (5). A slide rail (6) is provided on both sides of the chute (5). Both ends of the baffle (17) extend into the corresponding slide rail (6). A burner (20) and a gas calorific value analyzer body (21) are fixedly installed on the top of the inner cavity of the first heating furnace (2), the second heating furnace (3) and the third heating furnace (4). Three sets of drive components are located in the first heating furnace (2), the second heating furnace (3) and the third heating furnace (4) respectively, and are used to drive the two baffles (17) to rise and fall.

2. The heating furnace capable of mixing hot and cold billets according to claim 1, characterized in that: The driving component includes: A threaded rod (7) is rotatably installed in one of the slide rails (6). A rectangular groove (8) is provided in the feed roller conveyor (1) and directly above one of the slide rails (6). The top of the threaded rod (7) extends through the baffle (17) and the top of the slide rail (6) into the rectangular groove (8) and is fixedly installed with a bevel gear (9). A bevel gear (10) is meshed in the rectangular groove (8) and on one side of the bevel gear (9). Rectangular groove two (12) is opened in the feed roller conveyor (1) and located between two rectangular grooves one (8). A motor (16) is meshed and installed on one side of the first heating furnace (2). The output shaft of the motor (16) passes through one side of the feed roller conveyor (1) and is fixedly installed with a connecting shaft two (15). One end of the connecting shaft two (15) extends into the rectangular groove two (12) and is fixedly installed with a bevel gear four (14). Two bevel gear three (13) are meshed in the rectangular groove two (12) and located on both sides of the bevel gear four (14). A connecting shaft one (11) connects the bevel gear three (13) and the corresponding bevel gear two (10).

3. A heating furnace capable of mixing hot and cold billets according to claim 2, characterized in that: The threaded rod (7) is threadedly connected to the baffle (17), the bevel gear two (10) and bevel gear one (9) are rotatably connected to the rectangular groove one (8), the two bevel gears three (13) and bevel gear four (14) are rotatably connected to the rectangular groove two (12), and the output shafts of the two connecting shafts one (11), connecting shaft two (15) and the motor (16) are rotatably connected to the first heating furnace (2).

4. A heating furnace capable of mixing hot and cold billets according to claim 1, characterized in that: A pyrometer (19) is fixedly installed on the top of the feed roller conveyor (1) and in the first heating furnace (2), the second heating furnace (3) and the third heating furnace (4) respectively.

5. A heating furnace capable of mixing hot and cold billets according to claim 1, characterized in that: A storage battery is fixedly installed in the first heating furnace (2), the second heating furnace (3) and the third heating furnace (4), and the storage battery is electrically connected to the burner (20).

6. A heating furnace capable of mixing hot and cold billets according to claim 1, characterized in that: The baffle (17) is slidably connected to the slide rail (6).

7. A heating furnace capable of mixing hot and cold billets according to claim 1, characterized in that: The first heating furnace (2), the second heating furnace (3) and the third heating furnace (4) are made of high-temperature refractory bricks.

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