Induction type dry gate for a submerged arc furnace

Abstract

The utility model relates to the technical field of the submerged arc furnace, proposes an inductive submerged arc furnace dry cooling furnace door, include: furnace body, set up in the door frame and the door body embedded in the door frame inside in the furnace body inside, the door body includes fixed frame and filling layer, the filling layer adopts ceramic fiber material quality, the rear wall of filling layer is provided with heat -resisting steel sheet and is preset in heat -resisting steel sheet other side coating, the inside embedded of door frame has a plurality of temperature sensor and sound sensor. The inner wall of door body is attached with high temperature resistant paint, the temperature measuring device and the volume detection device are installed to the furnace door frame, and are connected with the furnace door switch, when the fire appears in the furnace, the temperature and volume detection device can alarm, when the large collapse material appears in the furnace, the temperature detection device can alarm, opens the furnace door and reminds the operator to carry out the material pushing operation, and multiple sensors adopt multiple redundancy design, avoid the damage or misjudgment of single sensor.

Description

Technical Field

[0001] This utility model belongs to the field of electric arc furnace technology, specifically relating to a dry-cooled furnace door for an induction electric arc furnace. Background Technology

[0002] The furnace door of a submerged arc furnace is a key component, mainly used for feeding, tamping, observing furnace conditions, and slag removal. It adopts a dry-cooling design, is lined with high-temperature resistant materials, and integrates temperature and sound sensors. It can monitor abnormalities inside the furnace in real time and automatically alarm, combining safety protection and intelligent operation functions.

[0003] A known authorized patent with application number 201820806481.9 discloses a high-heat-resistance submerged arc furnace door, comprising a door bottom plate and refractory bricks installed on the door bottom plate. A lifting ring seat and a sliding guide wheel are fixedly connected to the door bottom plate. Reinforcing ribs are fixedly installed on the door bottom plate, and the refractory bricks are fixedly embedded between adjacent reinforcing ribs. Connecting pins are inserted through the refractory bricks and reinforcing ribs. The refractory bricks are provided with brick insertion bevels and rib insertion bevels. They also have insertion tenons and insertion protrusions located on the insertion surface near the hot surface of the refractory brick, respectively, on two opposite insertion surfaces. The refractory bricks are generally hexahedral, with brick insertion bevels on three peripheral faces and a rib insertion bevel on the other peripheral face. This furnace door not only has good structural stability, but also has tightly interlocking refractory bricks, which can effectively prevent high-temperature corrosive gases from eroding and damaging the furnace door body, resulting in a long service life.

[0004] However, during the implementation of the relevant technology, the following problems were found with the above technical solution: the furnace door was not equipped with sensors, resulting in an unclear situation inside the furnace. During operation, the unclear situation could easily lead to production accidents.

[0005] Therefore, a dry-cooling furnace door for an induction-type submerged arc furnace is proposed to solve the above problems. Utility Model Content

[0006] This utility model proposes an induction-type dry-cooling furnace door for electric arc furnaces, which solves the problem in related technologies where the furnace door is not equipped with sensors, resulting in unclear conditions inside the furnace and making it easy for production accidents to occur during operation due to the lack of clarity of the situation.

[0007] The technical solution of this utility model is as follows: A dry cooling furnace door for an induction-type submerged arc furnace, comprising:

[0008] Furnace body;

[0009] The door frame is located inside the furnace body, and the door body is embedded inside the door frame;

[0010] The door body includes a fixed frame and a filling layer, wherein the filling layer is made of ceramic fiber material;

[0011] The rear wall of the filler layer is provided with a heat-resistant steel plate and a coating pre-installed on the other side of the heat-resistant steel plate;

[0012] The door frame is embedded with multiple temperature sensors and sound sensors. The outer walls of the temperature sensors and the outer walls of the sound sensors are provided with protective shells for damage protection.

[0013] The furnace body and the door are connected by a door closing assembly.

[0014] Preferably, a heat dissipation plate is provided on the other side of the filling layer, and heat dissipation fins are provided on the outer wall of the heat dissipation plate for heat dissipation of the door body. The fixing frame wraps around the filling layer, the heat-resistant steel plate and the heat dissipation plate. A covering frame is provided on the outer wall of the fixing frame for covering the gap between the furnace body and the covering frame.

[0015] Preferably, a first gear is rotatably connected inside the filling layer, and a rack is slidably connected inside the filling layer. The first gear and the rack mesh with each other, and the rack passes through the door frame and its end is located inside the furnace body.

[0016] Preferably, the outer wall of the filling layer is rotatably connected to a second gear, and the second gear is connected to the first gear via a drive shaft;

[0017] A drive motor is fixedly connected to the outer wall of the heat sink, and a third gear is provided at the output end of the drive motor, which meshes with the second gear.

[0018] Preferably, the outer wall of the door frame is provided with a rotating shaft, and the outer wall of the furnace body is provided with a connecting sleeve corresponding to the rotating shaft for opening and closing the door.

[0019] Preferably, the door closing assembly includes a fixed block and a hydraulic rod rotatably connected to the outer wall of the furnace body, the output end of the hydraulic rod being fixedly connected to the fixed block.

[0020] Preferably, a servo motor is provided on the outer wall of the furnace body, and a bent rod is fixedly connected to the outer wall of the door frame, with the output end of the servo motor located inside the bent rod.

[0021] Preferably, the other end of the second gear is provided with a rotating ring for manually rotating the first gear.

[0022] The working principle and beneficial effects of this utility model are as follows:

[0023] The inner wall of the door is coated with a high-temperature resistant coating. Temperature measuring devices and volume detection devices are installed on the door frame and are interlocked with the door opening and closing mechanism. When a spark occurs inside the furnace, the temperature and volume detection devices will trigger an alarm. When a large material collapse occurs inside the furnace, the temperature detection device will trigger an alarm and open the furnace door to remind the operator to push the material. In addition, multiple sensors adopt a multi-redundancy design to avoid damage or misjudgment of a single sensor. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0027] Figure 3 This is a cross-sectional perspective view of the filling layer of this utility model.

[0028] Figure 4 This is a cross-sectional three-dimensional structural diagram of the first gear of this utility model.

[0029] In the diagram: 1. Furnace body; 2. Door frame; 3. Cover frame; 4. Protective shell; 5. Sound sensor; 7. Fixing frame; 6. Temperature sensor; 8. Coating; 9. Heat-resistant steel plate; 10. Filler layer; 11. Heat dissipation plate; 12. Heat dissipation fins; 13. Rack; 14. First gear; 15. Second gear; 16. Rotating ring; 17. Drive motor; 18. Third gear; 19. Rotating shaft; 20. Hydraulic rod; 21. Fixing block; 22. Bent rod; 23. Servo motor. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0031] Implementation

[0032] Please see Figure 1 -4, A dry-cooling furnace door for an induction-type submerged arc furnace, comprising:

[0033] Furnace body 1;

[0034] A door frame 2 is set inside the furnace body 1 and a door body is embedded inside the door frame 2;

[0035] The door body includes a fixed frame 7 and a filling layer 10, the filling layer 10 being made of ceramic fiber material;

[0036] The rear wall of the filler layer 10 is provided with a heat-resistant steel plate 9 and a coating 8 pre-installed on the other side of the heat-resistant steel plate 9;

[0037] Multiple temperature sensors 6 and sound sensors 5 are embedded inside the door frame 2. The outer walls of the temperature sensors 6 and the outer walls of the sound sensors 5 are provided with protective shells 4 for damage protection.

[0038] The furnace body 1 is connected to the door body via a door closing assembly;

[0039] A heat dissipation plate 11 is provided on the other side of the filling layer 10. Heat dissipation fins 12 are provided on the outer wall of the heat dissipation plate 11 for heat dissipation of the door body. The fixing frame 7 wraps around the filling layer 10, the heat-resistant steel plate 9 and the heat dissipation plate 11. A covering frame 3 is provided on the outer wall of the fixing frame 7 for covering the gap between the furnace body 1 and the covering frame 3.

[0040] The filling layer 10 is rotatably connected to the first gear 14, and the filling layer 10 is slidably connected to the rack 13. The first gear 14 and the rack 13 mesh with each other. The rack 13 passes through the door frame 2 and its end is located inside the furnace body 1.

[0041] The outer wall of the filling layer 10 is rotatably connected to a second gear 15, which is connected to the first gear 14 via a drive shaft.

[0042] A drive motor 17 is fixedly connected to the outer wall of the heat sink 11. A third gear 18 is provided at the output end of the drive motor 17. The third gear 18 meshes with the second gear 15.

[0043] The door closing assembly includes a fixing block 21 and a hydraulic rod 20 rotatably connected to the outer wall of the furnace body 1. The output end of the hydraulic rod 20 is fixedly connected to the fixing block 21.

[0044] A servo motor 23 is installed on the outer wall of the furnace body 1, and a bent rod 22 is fixedly connected to the outer wall of the door frame 2. The output end of the servo motor 23 is located inside the bent rod 22.

[0045] The other end of the second gear 15 is provided with a rotating ring 16 for manually rotating the first gear 14.

[0046] The technical solution provided in this embodiment is as follows: During use, ensure the furnace door is tightly closed and operate normally. The heat-resistant steel plate 9 and the silicon carbide coating 8 are in direct contact with the flame and are resistant to high-temperature oxidation, preventing high-temperature substances from directly contacting internal components. The ceramic fiber filling layer 10 has strong heat insulation capabilities, blocking heat transfer to the outer door body. The heat dissipation plate 11 and heat dissipation fins 12 dissipate heat from the door body, preventing the overall temperature of the door body from becoming too high. At the same time, the temperature sensor 6 monitors the temperature inside the furnace in real time. When a large material collapse occurs inside the furnace, an alarm can be triggered by the temperature sensor 6. Before triggering an alarm, the temperature detected by two or more subsequent temperature sensors 6 must all reach the threshold to avoid false alarms. When a flame appears inside the furnace, it can be detected by the temperature sensor 6. The temperature sensor 6 and sound sensor 5 trigger an alarm. Upon hearing the alarm and the material stacking operation reminder, the furnace door opens. When it opens, the drive motor 17 rotates, driving the third gear 18 to rotate, which transmits the rotation to the second gear 15. The second gear 15 transmits power to the first gear 14 through the transmission shaft. The rotation of the first gear 14 causes the two racks 13 to retract and contact the fixation between them and the furnace body 1. Then, the servo motor 23 rotates. The rotation of the output end of the servo motor 23 causes the bent rod 22 to rotate and drive the door to rotate at a small angle, reducing the transmission angle of the hydraulic rod 20. Then, the hydraulic rod 20 retracts, driving the door to open. If the drive motor 17 malfunctions, the rotating ring 16 can be manually rotated to contact the fixation between the furnace body 1 and the door.

[0047] Furthermore, the outer wall of the door frame 2 is provided with a rotating shaft 19, and the outer wall of the furnace body 1 is provided with a connecting sleeve corresponding to the rotating shaft 19 for opening and closing the door.

[0048] Specifically, the opening and closing angle of the door is increased by redesigning the rotating shaft 19.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dry-cooling furnace door for an induction-type submerged arc furnace, characterized in that, include: Furnace body (1); A door frame (2) set inside the furnace body (1) and a door embedded inside the door frame (2); The door body includes a fixed frame (7) and a filling layer (10), wherein the filling layer (10) is made of ceramic fiber material; The rear wall of the filler layer (10) is provided with a heat-resistant steel plate (9) and a coating (8) pre-set on the other side of the heat-resistant steel plate (9). The door frame (2) is embedded with multiple temperature sensors (6) and sound sensors (5). The outer walls of the temperature sensors (6) and the outer walls of the sound sensors (5) are provided with protective shells (4) for damage protection. The furnace body (1) is connected to the door body through a door closing assembly.

2. The induction-type dry-cooled furnace door according to claim 1, characterized in that: A heat dissipation plate (11) is provided on the other side of the filling layer (10). The outer wall of the heat dissipation plate (11) is provided with heat dissipation fins (12) for dissipating heat from the door. The fixing frame (7) wraps around the filling layer (10), the heat-resistant steel plate (9) and the heat dissipation plate (11). The outer wall of the fixing frame (7) is provided with a covering frame (3) for covering the gap between the furnace body (1) and the covering frame (3).

3. The induction-type dry-cooled furnace door according to claim 1, characterized in that: The filling layer (10) is rotatably connected to a first gear (14), and the filling layer (10) is slidably connected to a rack (13). The first gear (14) and the rack (13) mesh with each other. The rack (13) passes through the door frame (2) and its end is located inside the furnace body (1).

4. The induction-type dry-cooling furnace door according to claim 2, characterized in that: The outer wall of the filling layer (10) is rotatably connected to a second gear (15), and the second gear (15) is connected to the first gear (14) through a transmission shaft; A drive motor (17) is fixedly connected to the outer wall of the heat sink (11). A third gear (18) is provided at the output end of the drive motor (17). The third gear (18) meshes with the second gear (15).

5. The induction-type dry-cooled furnace door according to claim 1, characterized in that: The outer wall of the door frame (2) is provided with a rotating shaft (19), and the outer wall of the furnace body (1) is provided with a connecting sleeve corresponding to the rotating shaft (19) for opening and closing the door.

6. The induction-type dry-cooled furnace door according to claim 1, characterized in that: The door closing assembly includes a fixing block (21) and a hydraulic rod (20) rotatably connected to the outer wall of the furnace body (1), the output end of which is fixedly connected to the fixing block (21).

7. The induction-type dry-cooling furnace door according to claim 1, characterized in that: The outer wall of the furnace body (1) is provided with a servo motor (23), and the outer wall of the door frame (2) is fixedly connected with a bent rod (22). The output end of the servo motor (23) is located inside the bent rod (22).

8. The induction-type dry-cooling furnace door of a submerged arc furnace according to claim 4, characterized in that: The other end of the second gear (15) is provided with a rotating ring (16) for manually rotating the first gear (14).

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