A protective device for electromagnetic induction heating furnace

Abstract

The present invention relates to the technical field of silicon steel annealing furnaces in the metallurgical industry, and specifically to a protective device for an electromagnetic induction heating furnace. The inductor used to lift the strip through the electromagnetic induction heating furnace includes an inlet protective device, an outlet protective device, a lifting cylinder, an upper crossbeam, a lower crossbeam, an upper protective pipe, a lower protective pipe, an inlet vertical roller, an outlet vertical roller, a downward pressure cylinder, a pressure roller, a guide rod 2, a pallet table roller, a nozzle, a protective frame, etc. The inductor can guide the strip through the electromagnetic induction heating furnace to avoid scratching the strip and the inductor furnace cavity, and at the same time has anti-magnetization heating and high temperature resistance capabilities, ensuring the safe and stable operation of the inductor and improving the continuous production life of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of silicon steel annealing furnaces in the metallurgical industry, and in particular to a protective device for an electromagnetic induction heating furnace. Background Art

[0002] In the field of silicon steel annealing furnaces, electromagnetic induction heating furnaces play a significant role in the industrial green clean energy industry. They are small in size but highly electrified, so they are widely used.

[0003] In a traditional electromagnetic induction heating furnace, when the strip passes through the inductor of the heating furnace, it is easy for the strip to scrape against the inductor cavity and cause an accident due to the fast running speed of the strip and the narrow gap between the inlet and outlet of the inductor. At the same time, since the heating furnace uses electromagnetic inductors for heating, the core area of ​​the induction zone has extremely high requirements for the anti-magnetization heating and high-temperature resistance capabilities of the protective equipment. The lifespan of ordinary protective equipment is difficult to meet the needs of continuous production.

[0004] Therefore, in order to ensure the safe and stable operation of the sensor, it is particularly important to design a safety protection device that can not only guide the strip to pass through, but also lift and lower the strip to pass through the sensor during the threading and maintenance process to avoid scratching the strip, and at the same time has the ability to prevent magnetized heating and high temperature resistance. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a protective device for an electromagnetic induction heating furnace, which can guide the strip steel to pass through the inductor of the electromagnetic induction heating furnace to avoid scratching between the strip steel and the inductor furnace cavity, and at the same time has the capabilities of magnetization heating and high temperature resistance, which can ensure the safe and stable operation of the inductor and improve the continuous production life of the equipment.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A protective device for an electromagnetic induction heating furnace, used for lifting a steel strip 1 through an inductor 2 of the electromagnetic induction heating furnace, comprising an inlet protective device 3 and an outlet protective device 4, wherein the inlet protective device 3 is arranged at the steel strip inlet side of the inductor 2, and the outlet protective device 4 is arranged at the steel strip outlet side of the inductor 2, and the inlet protective device 3 and the outlet protective device 4 are both provided with a protective frame 19, an upper crossbeam 7 is fixed to the upper part of the protective frame 19, a lifting cylinder 5 is provided at the lower part of the protective frame 19, an upper protective pipe 9 is fixed to the bottom of the upper crossbeam 7, a lower crossbeam 8 is connected to the top of the lifting cylinder 5, and a lower protective pipe 10 is fixed to the top of the lower crossbeam 8;

[0008] An inlet vertical roller 11 is provided on the side of the inlet protection device 3 away from the sensor 2, an outlet vertical roller 12 is provided on the side of the outlet protection device 4 away from the sensor 2, a pallet table roller 16 is provided on the side of the inlet vertical roller 11 away from the inlet protection device 3, a pressure roller 14 is provided above the pallet table roller 16, and a downward pressure cylinder 13 is connected to the top of the pressure roller 14.

[0009] Furthermore, there are five upper protective tubes 9 and five lower protective tubes 10 , and the upper protective tubes 9 and the lower protective tubes 10 on the same protective frame 19 are arranged in a staggered manner.

[0010] Furthermore, a vertical guide rod 1 6 is provided in the lifting cylinder 5 , and a vertical guide rod 2 15 is provided in the pressing cylinder 13 .

[0011] Furthermore, the pressure roller 14 and the pallet table roller 16 are arranged in a central position.

[0012] Furthermore, the entrance vertical roller 11 is composed of a bell-mouth guide vertical roller and a side protection vertical roller. The bell-mouth guide vertical roller is arranged on the side of the entrance vertical roller 11 away from the sensor 2, and the side protection vertical roller is arranged on the side of the entrance vertical roller 11 close to the sensor 2.

[0013] Furthermore, the sizes of the inlet vertical roller 11 and the outlet vertical roller 12 can be adjusted according to the size of the steel strip 1 .

[0014] Furthermore, a water cooling circuit is provided inside the upper protective tube 9 and the lower protective tube 10, and an inlet nozzle 17 is provided on the side of the upper protective tube 9 and the lower protective tube 10 close to the strip inlet, and an outlet nozzle 18 is provided on the side of the upper protective tube 9 and the lower protective tube 10 close to the strip outlet, and the inlet nozzle 17 and the outlet nozzle 18 are both connected to an external circulating water system.

[0015] Furthermore, the inlet vertical roller 11 and the outlet vertical roller 12 are both detachable vertical rollers.

[0016] Furthermore, the protection frame 19, the upper crossbeam 7, the lower crossbeam 8, the inlet vertical roller 11, and the outlet vertical roller 12 are all made of weakly magnetic or non-magnetic materials.

[0017] Furthermore, high-pressure cooling water circulates inside the water cooling circuit.

[0018] Compared with the prior art, the present invention has the following main advantages:

[0019] 1. The entrance and exit vertical rollers are respectively arranged on both sides of the inlet and outlet of the protective device. The entrance vertical rollers are composed of bell-mouth guide vertical rollers and side protection vertical rollers, and the exit vertical rollers are side protection vertical rollers, which can guide and protect the strip from scratching the inner side of the furnace when the strip deviates or breaks.

[0020] 2. The spacing between the vertical rollers on both sides of the strip can be adjusted according to the width of the strip, so that the protective device can adapt to strips of different widths. At the same time, the entrance and exit vertical rollers are detachable, which is convenient for roller replacement and more convenient to use;

[0021] 3. By fixing the support plate rollers in the horizontal direction at the entrance of the protective device to lift the strip, combined with the downward pressure cylinder and the pressure roller, the strip can be broken in an emergency and the strip can be limited to avoid the unstable running of the strip from hitting the sensor furnace cavity;

[0022] 4. When the strip is threaded, the lifting cylinders installed on both sides of the sensor drive the lower protective pipe to lift the strip to move up and down, which can adjust the threading height of the strip. At the same time, the upper protective pipe is fixed to the upper beam of the protective frame. The upper and lower protective pipes can prevent the broken strip from hitting or scraping the upper and lower sides of the furnace cavity;

[0023] 5. The protective frame, upper beam, lower beam, entrance vertical roller and exit vertical roller in the core area of ​​the electromagnetic induction area of ​​the sensor are made of weak magnetic or non-magnetic materials, which can improve the electromagnetic protection of the sensor;

[0024] 6. By setting a high-pressure water cooling circuit inside the upper protective pipe and the lower protective pipe, and connecting them to the external circulating water system through a nozzle, high-pressure cooling water is kept circulating inside the protective pipe and the lower protective pipe, which can take away the heat of the pipe wall that is electromagnetically heated together with the strip steel, thereby improving the high temperature resistance of the protective device and meeting the life requirements of continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the protective device of the present invention;

[0026] Figure 2 A top view of the protective device of the present invention;

[0027] Figure 3 It is a left side view of the protective device of the present invention.

[0028] In the figure: 1. Strip steel; 2. Sensor; 3. Inlet protection device; 4. Exit protection device; 5. Lifting cylinder; 6. Guide rod 1; 7. Upper crossbeam; 8. Lower crossbeam; 9. Upper protective pipe; 10. Lower protective pipe; 11. Inlet vertical roller; 12. Exit vertical roller; 13. Down-pressure cylinder; 14. Pressure roller; 15. Guide rod 2; 16. Pallet table roller; 17. Inlet nozzle; 18. Exit nozzle; 19. Protective frame. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0031] 1. Device structure

[0032] like Figures 1 to 3 As shown, the present invention provides a protective device for an electromagnetic induction heating furnace, which is used to guide and lift a steel strip 1 to pass through an inductor 2 of the electromagnetic induction heating furnace, thereby preventing the steel strip from scratching the inductor furnace cavity and ensuring safe and stable operation of the inductor.

[0033] Specifically, it includes an inlet protection device 3, an outlet protection device 4, a lifting cylinder 5, a guide rod 1 6, an upper crossbeam 7, a lower crossbeam 8, an upper protective pipe 9, a lower protective pipe 10, an inlet vertical roller 11, an outlet vertical roller 12, a downward pressure cylinder 13, a pressure roller 14, a guide rod 2 15, a pallet table roller 16, an inlet nozzle 17, an outlet nozzle 18, and a protective frame 19.

[0034] The inlet protection device 3 is arranged at the strip steel inlet side of the sensor 2, and the outlet protection device 4 is arranged at the strip steel outlet side of the sensor 2. Both the inlet protection device 3 and the outlet protection device 4 are provided with a protection frame 19;

[0035] The upper protective tube 9 and the lower protective tube 10 are each composed of five protective tubes, and the upper protective tube and the lower protective tube on the same protective frame 19 are installed in a staggered manner. The strip steel 1 passes between the upper protective tube and the lower protective tube. The upper protective tube 9 is fixed to the protective frame 19 through the upper crossbeam 7. The lower protective tube 10 is connected to the jacking cylinder 5 through the lower crossbeam 8. The jacking cylinder 5 is provided with a vertical guide rod 6. The jacking cylinder can drive the lower protective tube to lift the strip steel for lifting and lowering movements, thereby adjusting the strip steel threading height; when the strip steel is working normally, the jacking cylinder contracts and descends to drive the lower protective tube to descend, without affecting the normal work of the strip steel.

[0036] An inlet vertical roller 11 is provided on the inlet side of the inlet protection device 3, and an outlet vertical roller 12 is provided on the outlet side of the outlet protection device 4. A pallet table roller 16 is also provided on the inlet side of the inlet vertical roller 11, and a pressure roller 14 is provided above the pallet table roller 16. A downward pressure cylinder 13 is connected to the top of the pressure roller 14. A vertical guide rod 15 is provided inside the downward pressure cylinder 13, and is aligned with the pallet table roller 16 below it to protect the inner cavity of the sensor from being damaged when the strip breaks. When the strip works normally, the downward pressure cylinder 13 rises and the pressure roller 14 does not press down.

[0037] Furthermore, the entrance vertical roller 11 is composed of a bell-mouth guide vertical roller and a side protection vertical roller, and the exit vertical roller 12 functions as a protection vertical roller;

[0038] Furthermore, the spacing between the vertical rollers on both sides of the strip 1 can be adjusted according to the width of the strip 1 to adapt to strips of different widths; at the same time, the inlet vertical roller 11 and the outlet vertical roller 12 are both detachable vertical rollers, which is convenient for the replacement of the vertical rollers;

[0039] Furthermore, the protective frame 19, the upper beam 7, the lower beam 8, the inlet vertical roller 11 and the outlet vertical roller 12 in the core area of ​​the electromagnetic induction zone of the sensor 2 are all made of weak magnetic or non-magnetic materials, which can improve the electromagnetic protection of the sensor;

[0040] Furthermore, the upper protective tube 9 and the lower protective tube 10 are both provided with a water cooling circuit, and high-pressure cooling water circulates inside the water cooling circuit, so that the upper protective tube and the lower protective tube can take away the heat of the tube wall heated by electromagnetic heating; the upper protective tube and the lower protective tube are both provided with an inlet nozzle 17 on the side close to the strip inlet, and the upper protective tube and the lower protective tube are both provided with an outlet nozzle 18 on the side close to the strip outlet, and the inlet nozzle 17 and the outlet nozzle 18 are both connected to an external circulating water system.

[0041] 2. Working Principle

[0042] 1. The entrance vertical roller 11 and the exit vertical roller 12 are respectively arranged on both sides of the inlet and outlet of the protection device. The entrance vertical roller 11 is composed of a bell-mouth guide vertical roller and a side protection vertical roller, and the exit vertical roller 12 is a side protection vertical roller, which can guide and protect the strip from scratching the inner side of the furnace when the strip deviates or breaks.

[0043] 2. The spacing between the vertical rollers on both sides of the strip 1 can be adjusted according to the width of the strip 1, so that the protective device can adapt to strips of different widths. At the same time, the entrance vertical roller 11 and the exit vertical roller 12 are both detachable vertical rollers, which is convenient for roller replacement and more convenient to use;

[0044] 3. The strip steel is lifted by fixing the support roller 16 of the pallet table in the horizontal direction at the entrance of the protective device, and the strip steel can be broken in an emergency by cooperating with the downward pressure cylinder 13 and the pressure roller 14, and the strip steel can be limited to avoid the unstable running of the strip steel hitting the inductor furnace cavity;

[0045] 4. When the strip is threaded, the lifting cylinders 5 arranged on both sides of the sensor drive the lower protective tube 10 to lift the strip to move up and down, which can adjust the threading height of the strip. At the same time, the upper protective tube 9 is fixed to the upper beam of the protective frame. The upper protective tube 10 and the lower protective tube 9 can prevent the broken strip from hitting or scraping the upper and lower sides of the furnace cavity;

[0046] 5. The protective frame 19, upper beam 7, lower beam 8, inlet vertical roller 11 and outlet vertical roller 12 in the core area of ​​the electromagnetic induction zone are all made of weak magnetic or non-magnetic materials, which can improve the electromagnetic protection of the sensor;

[0047] 6. By setting a high-pressure water cooling circuit inside the upper protective tube 9 and the lower protective tube 10, and connecting them to an external circulating water system through a nozzle, high-pressure cooling water is kept circulating inside the protective tube 9 and the lower protective tube 10, which can take away the heat of the tube wall that is electromagnetically heated together with the strip steel, thereby improving the high temperature resistance of the protective device and meeting the life requirements of continuous production.

[0048] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective device for an electromagnetic induction heating furnace, used for lifting a steel strip (1) through an inductor (2) of the electromagnetic induction heating furnace, characterized in that: It comprises an inlet protection device (3) and an outlet protection device (4), wherein the inlet protection device (3) is arranged at the strip steel inlet side of the inductor (2), and the outlet protection device (4) is arranged at the strip steel outlet side of the inductor (2), and both the inlet protection device (3) and the outlet protection device (4) are provided with a protection frame (19), an upper crossbeam (7) is fixed on the upper part of the protection frame (19), a lifting cylinder (5) is provided on the lower part of the protection frame (19), an upper protective pipe (9) is fixed on the bottom of the upper crossbeam (7), a lower crossbeam (8) is connected to the top of the lifting cylinder (5), and a lower protective pipe (10) is fixed on the top of the lower crossbeam (8); An inlet vertical roller (11) is provided on the side of the inlet protection device (3) away from the sensor (2), an outlet vertical roller (12) is provided on the side of the outlet protection device (4) away from the sensor (2), a pallet table roller (16) is provided on the side of the inlet vertical roller (11) away from the inlet protection device (3), a pressure roller (14) is provided above the pallet table roller (16), and a downward pressure cylinder (13) is connected to the top of the pressure roller (14); The entrance vertical roller (11) is composed of a bell-mouth guide vertical roller and a side protection vertical roller, wherein the bell-mouth guide vertical roller is arranged on a side of the entrance vertical roller (11) away from the sensor (2), and the side protection vertical roller is arranged on a side of the entrance vertical roller (11) close to the sensor (2); The sizes of the inlet vertical roller (11) and the outlet vertical roller (12) can be adjusted according to the size of the steel strip (1); A water cooling circuit is provided inside the upper protective pipe (9) and the lower protective pipe (10); an inlet nozzle (17) is provided on one side of the upper protective pipe (9) and the lower protective pipe (10) close to the strip steel inlet; an outlet nozzle (18) is provided on one side of the upper protective pipe (9) and the lower protective pipe (10) close to the strip steel outlet; and the inlet nozzle (17) and the outlet nozzle (18) are both connected to an external circulating water system; The protective frame (19), the upper crossbeam (7), the lower crossbeam (8), the inlet vertical roller (11), and the outlet vertical roller (12) are all made of weakly magnetic or non-magnetic materials.

2. The protective device for an electromagnetic induction heating furnace according to claim 1, characterized in that: Five upper protective tubes (9) and five lower protective tubes (10) are provided respectively, and the upper protective tubes (9) and lower protective tubes (10) on the same protective frame (19) are arranged in a staggered manner.

3. The protective device for an electromagnetic induction heating furnace according to claim 1, characterized in that: The lifting cylinder (5) is provided with a first guide rod (6) in the vertical direction, and the pressing cylinder (13) is provided with a second guide rod (15) in the vertical direction.

4. The protective device for an electromagnetic induction heating furnace according to claim 1, characterized in that: The pressure roller (14) and the pallet table roller (16) are arranged in a central position.

5. The protective device for an electromagnetic induction heating furnace according to claim 1, characterized in that: The inlet vertical roller (11) and the outlet vertical roller (12) are both detachable vertical rollers.

6. The protective device for an electromagnetic induction heating furnace according to claim 1, characterized in that: High-pressure cooling water circulates inside the water-cooling circuit.

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