A steel rolling heating furnace

Abstract

The utility model belongs to the technical field of rolling equipment, especially relate to a rolling heating furnace. Including heating furnace, heating furnace includes heating furnace body, heating furnace body's adjacent two side walls are provided with heating furnace entrance and heating furnace export, and the opening direction of heating furnace entrance and heating furnace export is mutually perpendicular and forms L type material passage, be provided with the furnace drum line and step beam for supporting and conveying the billet in heating furnace body, step beam includes the horizontal moving beam of liftable and sets up between the furnace drum line and heating furnace export fixed support beam, the lifting path of horizontal moving beam is located in the clearance area between the adjacent roll way of furnace drum line, heating furnace export outside is equipped with the discharge mechanism for outputting the billet after heating, wherein, horizontal moving beam and fixed support beam cooperate and realize the step transfer of billet, and the end of fixed support beam and the turnover plate of discharge mechanism form the support transition surface.

Description

Technical Field

[0001] This utility model belongs to the technical field of steel rolling equipment, and in particular relates to a steel rolling heating furnace. Background Technology

[0002] A steel rolling heating furnace is an industrial furnace used to heat steel billets (or ingots) to a suitable temperature (usually 1100–1300°C) before the rolling process. Its purpose is to improve the metal's plasticity, reduce deformation resistance, facilitate subsequent rolling forming, and improve the internal microstructure and properties of the steel.

[0003] Traditional steel rolling furnaces (such as pusher-type or walking beam furnaces) have the following technical defects in the billet conveying process:

[0004] 1. Traditional heating furnaces have large inlet and outlet gates, which need to be fully opened each time material is fed or discharged, resulting in a large amount of high-temperature gas escaping from the furnace, low thermal efficiency, and increased fuel consumption.

[0005] Second, the movement of steel billets in the furnace relies on external jacking mechanisms or complex mechanical transmission devices, which not only takes up space but also increases the equipment failure rate.

[0006] Third, after the steel billet reaches the outlet, it needs to be pushed out manually or by an additional power mechanism, and it cannot be automatically slid out. Moreover, the gate is open for a long time during discharge, which further aggravates heat loss.

[0007] Fourth, frequent opening and closing of the gate leads to unstable furnace temperature, affecting the uniformity of billet heating and consequently affecting the quality of subsequent rolling. Summary of the Invention

[0008] This utility model addresses the shortcomings of existing technologies by providing a steel rolling heating furnace.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a steel rolling heating furnace, comprising a heating furnace body, wherein a heating furnace inlet and a heating furnace outlet are provided on two adjacent side walls of the heating furnace body, and the opening directions of the heating furnace inlet and the heating furnace outlet are perpendicular to each other to form an L-shaped material channel;

[0010] The furnace body is equipped with an in-furnace roller conveyor and a walking beam for supporting and conveying steel billets; the walking beam includes a liftable transverse beam and a fixed support beam set between the in-furnace roller conveyor and the furnace outlet, and the lifting path of the transverse beam is located in the gap area between adjacent rollers of the in-furnace roller conveyor.

[0011] A discharge mechanism is provided on the outside of the heating furnace outlet for discharging heated steel billets;

[0012] The transverse beam and the fixed support beam work together to achieve the step-by-step transfer of the steel billet, and the end of the fixed support beam forms a support transition surface with the tipping plate of the discharge mechanism.

[0013] Furthermore, the size of the furnace inlet is adapted to the cross-section of a single steel billet to reduce heat loss during feeding.

[0014] Furthermore, the walking beam also includes a ground rail fixedly installed at the bottom of the heating furnace body, and a transverse hydraulic cylinder whose cylinder body is fixed on the ground rail. The piston rod end of the transverse hydraulic cylinder is connected to a traveling trolley. The traveling trolley travels on the ground rail, and a lifting hydraulic cylinder is installed on the top of the traveling trolley. The cylinder body of the lifting hydraulic cylinder is fixed on the traveling trolley, and the piston rod of the lifting hydraulic cylinder extends vertically upward and is connected to the bottom of the transverse beam. It is used to drive the transverse beam to move up and down in the gap between adjacent rollers of the furnace roller line. The fixed support beam is used to support the steel billet during the walking process.

[0015] Furthermore, the ground rail is set along the length of the heating furnace body.

[0016] Furthermore, the discharge mechanism includes a support column, a tilting plate, and a tilting cylinder. The support column is fixed on the ground and on one side of the heating furnace outlet. The tilting plate is rotatably mounted on the top of the support column via a tilting shaft. The cylinder body of the tilting cylinder is hinged to the bottom side wall of the support column. The piston rod of the tilting cylinder is hinged to the end of the tilting plate away from the heating furnace outlet. The other end of the tilting plate extends from the heating furnace outlet into the heating furnace body.

[0017] Furthermore, the upper surface of the fixed support beam is coplanar with the roller surface of the furnace drum line. Furthermore, the distance between the end of the fixed support beam and the connecting end of the turning plate is 1 / 5 to 1 / 4 of the billet length, and the upper surfaces of both form a continuous plane when in a horizontal state.

[0018] Furthermore, the heating furnace outlet is provided with a flap, which is mounted on the heating furnace body via a rotating shaft. The rotating shaft is located above the flap, and the flap naturally hangs down under the action of gravity to close the heating furnace outlet.

[0019] Furthermore, the lower edge of the flap extends above the support transition surface, which is formed by the fixed support beam and the flap together; the closed position of the flap maintains a distance of 5-10mm from the support transition surface; when the billet moves to the flap, the flap can be opened to discharge the billet.

[0020] Compared with the prior art, this utility model has the following advantages.

[0021] This utility model of a steel rolling heating furnace can reduce heat loss. The furnace inlet is designed to be only slightly larger than the cross-section of a single steel billet, significantly reducing heat loss during feeding. Furthermore, the outlet flap automatically closes after the steel billet slides out, preventing the leakage of high-temperature gas.

[0022] This invention features a transverse beam that lifts and moves the steel billet in steps, while a fixed support beam provides intermediate support, ensuring a smooth transition of the billet to the tipping plate. It eliminates the need for an external jacking mechanism, resulting in a rational structure and improved reliability. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0024] Figure 1 This is a partial three-dimensional view of the steel rolling heating furnace in the embodiment.

[0025] Figure 2 This is a front view of the steel rolling heating furnace in the embodiment.

[0026] Figure 3 This is a side sectional view of the furnace body of the steel rolling heating furnace in the embodiment.

[0027] Figure 4-5 yes Figure 3 A-direction view.

[0028] In the diagram, 1 is the feeding mechanism; 2 is the heating furnace; 3 is the discharging mechanism; 4 is the steel billet; 5 is the walking beam; 201 is the heating furnace inlet; 202 is the heating furnace outlet; 203 is the flip plate; 204 is the heating furnace body; 205 is the furnace inner roller conveyor; 301 is the support column; 302 is the flip plate; 303 is the tilting cylinder; 304 is the tilting shaft; 501 is the ground rail; 502 is the transverse hydraulic cylinder; 503 is the traveling trolley; 504 is the lifting hydraulic cylinder; 505 is the transverse beam; and 506 is the fixed support beam. Detailed Implementation

[0029] like Figure 1-5 As shown, the steel rolling heating furnace includes a heating furnace 2; the heating furnace 2 includes a heating furnace body 204, and a heating furnace inlet 201 and a heating furnace outlet 202 are provided on two adjacent side walls of the heating furnace body 204, and the opening directions of the heating furnace inlet 201 and the heating furnace outlet 202 are perpendicular to each other to form an L-shaped material channel; the size of the heating furnace inlet 201 is adapted to the cross-section of a single steel billet 4 to reduce heat loss during feeding.

[0030] The heating furnace body is equipped with an in-furnace roller conveyor 205 and a walking beam 5 for supporting and conveying steel billets 4. The walking beam 5 includes a liftable transverse beam 505 and a fixed support beam 506 located between the in-furnace roller conveyor 205 and the heating furnace outlet 202. The lifting path of the transverse beam 505 is located in the gap area between adjacent rollers of the in-furnace roller conveyor 205. A discharge mechanism 3 is provided on the outside of the heating furnace outlet 202 for discharging the heated steel billets 4. The transverse beam 505 and the fixed support beam 506 cooperate to realize the stepping transfer of the steel billets 4. The end of the fixed support beam 506 forms a support transition surface with the tipping plate 302 of the discharge mechanism 3.

[0031] Preferably, the walking beam 5 further includes a ground rail 501 fixedly installed at the bottom of the heating furnace body 204, and a transverse hydraulic cylinder 502 with its cylinder body fixed on the ground rail 501, wherein the ground rail 501 is arranged along the length direction of the heating furnace body 204. The piston rod end of the transverse hydraulic cylinder 502 is connected to a traveling trolley 503; the traveling trolley 503 travels on the ground rail, and a lifting hydraulic cylinder 504 is installed on the top of the traveling trolley 503. The cylinder body of the lifting hydraulic cylinder 504 is fixed on the traveling trolley 503, and the piston rod of the lifting hydraulic cylinder 504 extends vertically upward and is connected to the bottom of the transverse beam 505, for driving the transverse beam 505 to move up and down in the gap between adjacent rollers of the furnace roller line 205. The fixed support beam 506 is used to support the steel billet 4 during the walking process.

[0032] Preferably, the discharge mechanism 3 includes a support column 301, a tilting plate 302, and a tilting cylinder 303. The support column 301 is fixed to the ground on one side of the furnace outlet 202. The tilting plate 302 is rotatably mounted on the top of the support column 301 via a tilting shaft 304. The cylinder body of the tilting cylinder 303 is hinged to the bottom side wall of the support column 301. The piston rod of the tilting cylinder 303 is hinged to one end of the tilting plate 302 away from the furnace outlet 202. The other end of the tilting plate 302 extends from the furnace outlet 202 into the furnace body 204. The end of the tilting plate 302 extending into the furnace body 204 is located below the inner side of the tilting plate 203.

[0033] The stepping process of this utility model is as follows: the transverse beam 505 lifts the steel billet 4, the transverse beam 505 moves forward, the steel billet 4 falls onto the fixed support beam 506, the transverse beam 505 resets, and the next cycle begins (the steel billet 4 moves from the fixed support beam 506 to the tipping plate). Specifically, during the lifting stage, the lifting cylinder 504 pushes the transverse beam 505 upward, causing the steel billet 4 to detach from the furnace roller conveyor 205. During the conveying stage, the transverse cylinder 502 pushes the traveling trolley 503 to move along the ground rail 501 by a set step distance. During the reset stage, the lifting cylinder 504 lowers, causing the steel billet 4 to fall onto the fixed support beam 506 or the furnace roller conveyor 205.

[0034] Preferably, the upper surface of the fixed support beam 506 is coplanar with the roller surface of the furnace roller line 205. The distance between the end of the fixed support beam 506 and the connecting end of the turning plate 302 is 1 / 5 to 1 / 4 of the billet length, and the upper surfaces of the two form a continuous plane when in a horizontal state. The vertical distance between the continuous plane and the inner surface of the turning plate 203 is 8-15 mm.

[0035] Preferably, the heating furnace outlet 202 is provided with a flap 203, which is mounted on the heating furnace body 204 via a rotating shaft. The rotating shaft is located above the flap 203, and the flap 203 naturally droops down under gravity to close the heating furnace outlet 202. The lower edge of the flap 203 extends above the supporting transition surface, which is formed by the fixed support beam 506 and the tipping plate 302. The closed position of the flap 203 maintains a distance of 5-10 mm from the supporting transition surface. When the billet 4 moves to the tipping plate 302, the flap 203 can be opened to discharge the billet.

[0036] Example 1: The stroke of the horizontal hydraulic cylinder 502 and the lifting movement of the lifting hydraulic cylinder 504 are controlled by a PLC to achieve the following work cycle:

[0037] a) The lifting cylinder 504 rises, causing the transverse beam 505 to support and receive the steel billet 4.

[0038] b) The transverse hydraulic cylinder 502 then pushes the traveling trolley 503 to move a predetermined step distance.

[0039] c) The lifting cylinder 504 descends to lower the billet 4 onto the fixed support beam 506.

[0040] d) The horizontal hydraulic cylinder 502 resets, causing the traveling trolley 503 to return. The cycle then begins.

[0041] Example 2: Displacement sensors are installed between the cylinder body of the transverse hydraulic cylinder 502 and the ground rail 501, and between the cylinder body of the lifting hydraulic cylinder 504 and the traveling trolley 503. The signal output terminals of the displacement sensors are connected to the PLC controller, and the output terminals of the PLC controller are electrically connected to the solenoid valves of the transverse hydraulic cylinder 502 and the lifting hydraulic cylinder 504, respectively. This achieves integrated control. Since PLC control is a conventional technique in this field, it will not be described in detail here.

[0042] Example 3: Introduction to the working process and principle of a steel rolling heating furnace:

[0043] Step 1: The steel billet 4 is pushed into the heating furnace through the feeding mechanism 1 from the inlet 201, and its cross-sectional dimensions match the inlet. The feeding mechanism 1 can be an existing steel billet conveying pipeline, which will not be described in detail.

[0044] Step 2: The billet 4 is supported by the roller surface of the furnace roller line 205, and the upper surface of the fixed support beam 506 is flush with the top surface of the roller line.

[0045] Step 3 is specifically divided into:

[0046] 3.1 The piston rod of the lifting cylinder 504 extends, driving the transverse beam 505 to rise and pass through the gap of the roller table. The transverse beam 505 lifts the steel billet away from the roller surface of the furnace roller line 205.

[0047] 3.2 The transverse hydraulic cylinder 502 pushes the traveling trolley 503 to move along the ground rail 501, and the steel billet moves with the transverse beam 505 towards the heating furnace outlet 202 by a set step distance.

[0048] 3.3 The piston rod of the lifting cylinder 504 retracts, the steel billet falls onto the fixed support beam 506, and the transverse beam 505 returns to the gap of the roller conveyor.

[0049] 3.4 Repeat steps 3.1-3.3 until the steel billet reaches the end of the fixed support beam 506.

[0050] Step 4: Because the end of the fixed support beam forms a continuous support surface with the tipping plate, during the last movement, the billet moves from the fixed support beam 506 to the horizontal plane of the tipping plate 302. This process is repeated each time.

[0051] Step 5: The piston rod of the tilting cylinder 303 retracts, pulling the tilting plate 302 to tilt around the tilting shaft 304; and the tilting plate only moves when there is material. The steel billet slides out of the heating furnace outlet 202 along the tilting tilting plate 302, and the tilting plate 302 is reset to a horizontal state under the drive of the tilting cylinder 303, waiting for the next material to be received.

[0052] Step 6: When the billet 4 slides from the tipping plate 302 to the furnace outlet 202: the front end of the billet 4 contacts the lower edge of the tipping plate 203, overcoming the gravity of the tipping plate and causing it to rotate around the axis to open; after the billet 4 has completely slid out, the tipping plate 203 automatically swings back and closes under the action of gravity.

[0053] Example 4: Two transverse beams 505 are arranged in parallel and are located in the gap between the two rollers of the furnace roller line 205; two fixed support beams 506 are also arranged between the furnace roller line 205 and the heating furnace outlet 202; and the two fixed support beams are parallel; the two transverse beams 505 are driven synchronously by the same traveling trolley 503, and the two fixed support beams 506 are fixed together by a connecting crossbeam.

[0054] During the discharge process, the steel billet slides out, and after the flap 203 is opened, it automatically closes without the need for additional power intervention. Furthermore, the flap 302 receives the material horizontally and discharges it at an angle, seamlessly transitioning with the fixed support beam 506 to prevent the steel billet from getting stuck.

[0055] The inlet and outlet of this utility model are arranged vertically on adjacent side walls, and with the help of small-sized openings, the temperature fluctuation inside the furnace is reduced, ensuring that the steel billet is heated evenly.

[0056] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A steel rolling heating furnace, comprising a heating furnace (2); characterized in that, The heating furnace (2) includes a heating furnace body (204). A heating furnace inlet (201) and a heating furnace outlet (202) are provided on two adjacent side walls of the heating furnace body (204). The opening directions of the heating furnace inlet (201) and the heating furnace outlet (202) are perpendicular to each other to form an L-shaped material channel. The furnace body is provided with an in-furnace roller conveyor (205) and a walking beam (5) for supporting and conveying steel billets (4); the walking beam (5) includes a liftable transverse beam (505) and a fixed support beam (506) set between the in-furnace roller conveyor (205) and the furnace outlet (202). The lifting path of the transverse beam (505) is located in the gap area between adjacent rollers of the in-furnace roller conveyor (205); A discharge mechanism (3) is provided on the outside of the heating furnace outlet (202) for discharging heated steel billets (4); Among them, the transverse beam (505) and the fixed support beam (506) work together to realize the step-by-step transfer of the billet (4), and the end of the fixed support beam (506) forms a support transition surface with the flipping plate (302) of the discharge mechanism (3).

2. The steel rolling heating furnace according to claim 1, characterized in that, The size of the furnace inlet (201) is adapted to the cross-section of a single steel billet (4) to reduce heat loss during feeding.

3. The steel rolling heating furnace according to claim 1, characterized in that, The stepping beam (5) also includes a ground rail (501) fixedly installed at the bottom of the heating furnace body (204) and a transverse oil cylinder (502) whose cylinder body is fixed on the ground rail (501). The piston rod end of the transverse oil cylinder (502) is connected to a traveling trolley (503). The traveling trolley (503) travels on the ground rail, and a lifting oil cylinder (504) is installed on the top of the traveling trolley (503). The cylinder body of the lifting oil cylinder (504) is fixed on the traveling trolley (503). The piston rod of the lifting oil cylinder (504) extends vertically upward and is connected to the bottom of the transverse beam (505) for driving the transverse beam (505) to move up and down in the gap between adjacent rollers of the furnace roller line (205). The fixed support beam (506) is used to support the billet (4) during the stepping process.

4. The steel rolling heating furnace according to claim 3, characterized in that, The ground rail (501) is set along the length of the heating furnace body (204).

5. The steel rolling heating furnace according to claim 1, characterized in that, The discharge mechanism (3) includes a support column (301), a tilting plate (302), and a tilting cylinder (303). The support column (301) is fixed on the ground and on one side of the furnace outlet (202). The tilting plate (302) is rotatably mounted on the top of the support column (301) via a tilting shaft (304). The cylinder body of the tilting cylinder (303) is hinged to the bottom side wall of the support column (301). The piston rod of the tilting cylinder (303) is hinged to one end of the tilting plate (302) away from the furnace outlet (202). The other end of the tilting plate (302) extends from the furnace outlet (202) into the furnace body (204).

6. The steel rolling heating furnace according to claim 5, characterized in that, The upper surface of the fixed support beam (506) is coplanar with the roller surface of the furnace roller line (205).

7. The steel rolling heating furnace according to claim 5, characterized in that, The distance between the end of the fixed support beam (506) and the connecting end of the turning plate (302) is 1 / 5 to 1 / 4 of the length of the billet, and the upper surfaces of the two form a continuous plane when they are in a horizontal state.

8. The steel rolling heating furnace according to claim 1, characterized in that, The furnace outlet (202) is provided with a flap (203), which is mounted on the furnace body (204) via a rotating shaft. The rotating shaft is located above the flap (203), and the flap (203) naturally hangs down under the action of gravity to close the furnace outlet (202).

9. The steel rolling heating furnace according to claim 8, characterized in that: The lower edge of the flap (203) extends above the support transition surface, which is formed by the fixed support beam (506) and the flap (302); the closed position of the flap (203) maintains a distance of 5-10mm from the support transition surface; when the billet (4) moves to the flap (302), the flap (203) can be opened to discharge the billet.

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