A movable electric arc furnace body outer wall temperature sensing alarm spraying device

Abstract

The application discloses a temperature-sensing alarm spraying device for the outer wall of a mobile electric arc furnace, and relates to the technical field of electric arc furnace production and maintenance equipment. The temperature-sensing alarm spraying device comprises a furnace body and a temperature probe, and further comprises a shell, a track assembly and a spraying assembly. The shell is a U-shaped shell arranged on the outer part of the furnace body. The track assembly is connected to the inner surface of the shell, the top of the track assembly is higher than the highest part of the molten substance in the furnace body, and the bottom of the track assembly is lower than the height of the raw material in the furnace body, so that the temperature probe can be supported to move on the outer wall of the furnace body. The spraying assembly comprises a fixed spraying ring and a movable spraying head. The fixed spraying ring is a ring-shaped water pipe fixed to the top of the shell and surrounding the furnace body, and a plurality of nozzles are arranged on the fixed spraying ring. The movable spraying head can move through the track assembly. The temperature-sensing alarm spraying device can enhance the temperature detection accuracy and the local cooling effect of the outer wall of the furnace body during the smelting process of the electric arc furnace, and can further improve the technical effect of the production rate of the electric smelting alpha alumina brick.

Description

Technical Field

[0001] This invention relates to the field of electric arc furnace maintenance equipment technology, and in particular to a mobile electric arc furnace outer wall temperature sensing alarm spray device. Background Technology

[0002] Fused α-alumina bricks are high-quality refractory materials with advantages such as high temperature resistance and strong thermal shock resistance. Their crystalline structure causes almost no contamination to the molten glass, making them the preferred refractory material for glass melting furnaces. However, fused α-alumina bricks are also characterized by high technical content, difficult manufacturing, and complex processes, resulting in a low yield. An electric arc furnace is an electric furnace that uses the high temperature generated by the electric arc of electrodes to melt fused bricks. During use, some electrode fragments may fall off due to physical impact and corrosion from the molten material. Electrode fragments floating on the surface of the molten material discharge with the electrodes. When the electrode fragments approach the outer wall of the furnace, they can cause localized high temperatures on the outer wall, reducing the service life of the furnace and affecting the production quality of the fused brick molten material. Therefore, it is necessary to monitor the inside of the furnace during production to remove the fallen electrode fragments in a timely manner.

[0003] Chinese invention patent CN202011612262.5 discloses an automatic temperature-sensing alarm spray system for the outer wall of an electric arc furnace. The system includes a furnace body and a detection spray system installed outside the furnace body. The detection spray system includes spray pipes, a controller, and a temperature-sensing ring. The temperature-sensing ring consists of multiple temperature probes evenly distributed along the circumference of the outer wall of the furnace body. These temperature probes and multiple flow valves are electrically connected to the controller. The controller adjusts the state of the corresponding flow valves based on the monitoring results of the temperature probes on the outer wall of the furnace body to achieve spray cooling at different locations on the outer wall. This system improves the service life of the electric arc furnace by automatically monitoring the temperature of the outer wall and promptly spraying and cooling abnormal areas. Simultaneously, it ensures stable production over extended periods while maintaining production efficiency and finished product quality.

[0004] The above-mentioned invention patent has the following problems: 1. When the raw materials of fused α-alumina bricks are melted in the electric arc furnace, the liquid level of the molten material gradually rises, while the position of the temperature sensing ring is fixed, so the temperature detection between the temperature sensing rings is inaccurate; 2. Relying on the temperature sensing probe to detect the temperature of the outer wall of the furnace, there is a gap between adjacent temperature sensing probes, and the temperature detection at the gap is inaccurate. If the number of temperature sensing probes is increased to improve the detection range, the cost is high. Summary of the Invention

[0005] This invention provides a mobile electric arc furnace outer wall temperature sensing and alarm spray device, which solves the technical problems of inaccurate temperature detection and poor local cooling effect of existing electric arc furnace outer wall temperature sensing and alarm spray devices during the electric arc furnace melting process, thus affecting the yield of fused α-alumina bricks. It achieves the technical effect of improving the accuracy of temperature detection and local cooling effect on the outer wall of the furnace during the electric arc furnace melting process, thereby improving the yield of fused α-alumina bricks.

[0006] This invention provides a mobile electric arc furnace outer wall temperature sensing alarm spray device, including a furnace body and a temperature probe.

[0007] Its features include a housing, a track assembly, and a spray assembly;

[0008] The shell is fitted outside the furnace body and has a U-shaped longitudinal section, used to support the track assembly and spray assembly;

[0009] The track assembly is fixedly connected to the inner surface of the shell, with its top higher than the highest point of the molten material inside the furnace and its bottom lower than the height of the raw material inside the furnace. It is used to support the temperature probes to move on the outer wall of the furnace. There are multiple temperature probes distributed on the track assembly.

[0010] The spray assembly includes a fixed spray ring and a movable spray head;

[0011] The fixed spray ring is an annular water pipe fixed to the top of the shell and surrounding the furnace body, and multiple spray nozzles are arranged on the fixed spray ring;

[0012] The movable spray head can be moved via a track assembly to spray water onto the area where the furnace body temperature is abnormally high, as detected by the temperature probe.

[0013] Preferably, the track assembly includes a circular track and a vertical track;

[0014] The annular track consists of multiple sets of circular tracks fixed on the inner surface of the shell;

[0015] The vertical track consists of multiple sets of straight tracks fixed to the inner surface of the housing. The top of the vertical track is connected to the top of the annular track, and the bottom of the vertical track is connected to the bottom of the annular track. The vertical track and the annular track intersect each other.

[0016] Preferably, the shell further includes a sandwich layer with a filler between the sandwich layers for maintaining the shell temperature; the filler is paraffin wax.

[0017] Preferably, the spray assembly further includes a water supply pipe and a flow valve;

[0018] One end of the water supply pipe is connected to the circulating water channel, and the other end is connected to the fixed spray ring and the movable spray head is connected through the hose.

[0019] The flow valves are connected to the water supply pipe of the fixed spray ring and the hose of the movable spray head, respectively. The flow valve connected to the fixed spray ring adjusts the spray volume according to the overall temperature of the furnace body, while the flow valve connected to the hose of the movable spray head adjusts the spray volume according to whether the furnace body temperature detected by the temperature probe is abnormally high.

[0020] Preferably, the filler is paraffin wax.

[0021] Preferably, the nozzle angle of the fixed spray ring is tilted downwards at 15 to 25 degrees, so that the sprayed water flows downwards along the outer wall of the furnace.

[0022] Preferably, the movable spray head maintains a distance of 5 to 10 centimeters from the furnace body when spraying.

[0023] Preferably, the movable spray head includes a cooling head, a baffle plate, an inlet pipe, and a return pipe;

[0024] The cooling head is drum-shaped and can be movably connected to the track assembly;

[0025] The baffle plate consists of multiple bent bimetallic sheets that lean against each other. The sheet closer to the furnace body is made of iron, and the sheet closer to the shell is made of copper. When the baffle plate is exposed to high temperatures, it bends towards the iron side; when it returns to normal temperature, it bends towards the copper side. The baffle plate is fixed to the top of the cooling head and is used to respond to abnormal temperature increases.

[0026] When the outer wall of the furnace contracts, the baffle plate can come into contact with the outer wall of the furnace when it contracts;

[0027] One end of the water inlet pipe is fixedly connected to the inside of the cooling head, and the other end is connected to the circulating water channel, which is used to transport water to the cooling head;

[0028] The return water pipe is sleeved outside the inlet water pipe. The end near the circulating water channel is connected to the water pump motor, and the end near the furnace body is connected to the inside of the cooling head. The diameter of the return water pipe is twice the diameter of the inlet water pipe. It is used to extract water that enters the cooling head through the inlet water pipe and water vapor generated by evaporation.

[0029] Preferably, the water baffle is trapezoidal in shape.

[0030] Preferably, the inlet pipe and the return pipe are provided with support members to prevent changes in pipe diameter due to suction.

[0031] One or more technical solutions provided in this invention have at least the following technical effects or advantages:

[0032] By providing a shell fitted outside the furnace body, the inner surface of the shell is provided with a track assembly for moving a temperature probe. The track assembly consists of a circular track and a vertical track. The temperature probe can monitor the temperature of the outer wall of the furnace body via the circular track and adjust its position via the vertical track, allowing the temperature probe to adjust its monitoring range according to the rise of molten material inside the furnace. When the temperature probe detects an abnormal temperature rise at a certain point on the outer wall of the furnace body, a movable spray head moves to the abnormally high point on the outer wall of the furnace body via the track assembly to spray and cool the key area. This solves the technical problem of inaccurate temperature detection and poor local cooling effect of existing electric arc furnace outer wall temperature sensing and alarm spray devices during electric arc furnace smelting, which affects the yield of fused α-alumina bricks. This achieves the technical effect of enhancing the accuracy of temperature detection and local cooling effect on the outer wall of the furnace body during electric arc furnace smelting, thereby improving the yield of fused α-alumina bricks. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the track assembly of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the spray assembly of the present invention;

[0036] Figure 4 This is a schematic diagram of the overall structure of the present invention with the addition of a movable spray head;

[0037] Figure 5 This is a schematic diagram of the structure of the movable spray head of the present invention;

[0038] Figure 6 This is a top view of the movable spray head of the present invention;

[0039] Figure 7 This is a schematic diagram of the structure of the movable spray head of the present invention under heated conditions;

[0040] Figure 8 This is a top view of the movable spray head of the present invention in a heated state.

[0041] Figure label:

[0042] Furnace body 100, temperature probe 110,

[0043] 200 shell, 210 drain outlet, 220 interlayer, 230 filler

[0044] Track assembly 300, circular track 310, vertical track 320,

[0045] Spray assembly 400, fixed spray ring 410, movable spray head 420, water supply pipe 430, flow valve 440, cooling head 510, baffle plate 520, inlet pipe 530, return pipe 540. Detailed Implementation

[0046] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0047] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] Please see Figure 1 This is a schematic diagram of the overall structure of the present invention. A shell 200 is provided outside the furnace body 100. The inner surface of the shell 200 is provided with a track assembly 300 for the temperature probe 110 to move. The track assembly 300 is divided into a ring track 310 and a vertical track 320. The temperature probe 110 can monitor the temperature of the outer wall of the furnace body 100 via the ring track 310 and adjust its position via the vertical track 320, allowing the temperature probe 110 to adjust its monitoring range according to the rising molten material inside the furnace body 100. When the temperature probe 110 monitors… When an abnormal temperature rise is detected at a certain point on the outer wall of the furnace body 100, the movable spray head 420 moves to the abnormally high point on the outer wall of the furnace body 100 via the track assembly 300 to spray and cool the key area. This solves the technical problem that existing electric arc furnace outer wall temperature sensing alarm spray devices are inaccurate in detecting the temperature of the outer wall of the furnace body during the electric arc furnace melting process and have poor local cooling effect, thus affecting the yield of fused α-alumina bricks. This achieves the technical effect of enhancing the accuracy of temperature detection of the outer wall of the furnace body and the local cooling effect during the electric arc furnace melting process, thereby improving the yield of fused α-alumina bricks. Example 1

[0050] like Figure 1As shown, the mobile electric arc furnace outer wall temperature sensing alarm spray device of this application includes a furnace body 100 and a temperature probe 110, and also includes a shell 200, a track assembly 300 and a spray assembly 400.

[0051] The shell 200 is fitted outside the furnace body 100, and has a U-shaped longitudinal section. It is used to support the track assembly 300 and the spray assembly 400. A drain outlet 210 is provided at the bottom of the shell 200, which is connected to a circulating water channel.

[0052] Water-connected spray assembly 400 is used to recycle the water used for cooling spraying.

[0053] like Figure 2 As shown, the track assembly 300 is fixedly connected to the inner surface of the shell 200. The top is higher than the highest point of the molten material inside the furnace body 100, and the bottom is lower than the height of the raw material inside the furnace body 100. It is used to support the temperature probe 110 to move on the outer wall of the furnace body 100. There are multiple temperature probes 110, which are distributed on the track assembly 300. The track assembly 300 includes a ring track 310 and a vertical track 320.

[0054] The annular track 310 consists of multiple sets of circular tracks fixed on the inner surface of the housing 200, used to allow the temperature probe 110 to monitor the temperature around the outer wall of the furnace body 100.

[0055] The vertical track 320 consists of multiple sets of straight tracks fixed on the inner surface of the shell 200. The top of the vertical track 320 is connected to the top of the ring track 310, and the bottom of the vertical track 320 is connected to the bottom of the ring track 310. The vertical track 320 and the ring track 310 intersect each other, which is used to allow the temperature probe 110 to adjust its own track according to the position of the molten material in the furnace body 100.

[0056] Preferably, the shell 200 further includes a sandwich 220, with a filler 230 between the sandwich 220 to maintain the temperature of the shell 200, reduce the problem of water vapor accelerating liquefaction and releasing heat due to the temperature difference between the high temperature of water vapor and the low temperature of the shell 200, and improve the cooling effect.

[0057] Preferably, the filler 230 is paraffin wax;

[0058] like Figure 3 As shown, the spray assembly 400 includes a fixed spray ring 410, a movable spray head 420, a water supply pipe 430, and a flow valve 440, which are used to spray the outer wall of the furnace body 100 to cool it down.

[0059] The fixed spray ring 410 is an annular water pipe fixed to the top of the shell 200 and surrounding the furnace body 100. The fixed spray ring 410 has multiple nozzles arranged on it for quantitative spraying and cooling of the furnace body 100 during smelting.

[0060] Preferably, the nozzle angle of the fixed spray ring 410 is tilted downwards at 15 to 25 degrees, so that the sprayed water flows downwards along the outer wall of the furnace body 100, which can prevent splashing caused by direct spraying and increase the area of ​​spray cooling.

[0061] The movable spray head 420 can be moved via the track assembly 300 to spray water onto the location where the temperature of the furnace body 100 is abnormally high, as detected by the temperature probe 110.

[0062] Preferably, the movable spray head 420 maintains a distance of 5 to 10 centimeters from the furnace body 100 when spraying;

[0063] One end of the water supply pipe 430 is connected to the circulating water channel, the other end is connected to the fixed spray ring 410, and is connected to the movable spray head 420 through a hose.

[0064] The flow valves 440 are respectively connected to the water supply pipe 430 of the fixed spray ring 410 and the flexible hose of the movable spray head 420. The flow valves 440 connected to the fixed spray ring 410 adjust the spray volume according to the overall temperature of the furnace body 100.

[0065] The flow valve 440 on the hose of the dynamic spray head 420 adjusts the spray volume according to whether the furnace body temperature detected by the temperature probe 110 rises abnormally, and is used to adjust the spray volume of the spray assembly 400 according to the temperature of the furnace body 100 detected by the temperature probe.

[0066] The working process of a mobile electric arc furnace outer wall temperature sensing alarm spray device according to an embodiment of this application is as follows:

[0067] 1. When the electric arc furnace is working normally, the temperature of the outer wall of the furnace body 100 gradually increases. At the same time, the spray assembly 400 is started, and the fixed spray ring 410 sprays a quantitative amount of water to cool the outer wall of the furnace body. The amount of water sprayed by the fixed spray ring 410 is controlled by the flow valve 440 according to the temperature of the outer wall of the furnace body 100 detected by the temperature probe 110.

[0068] 2. While the fixed spray ring 410 starts spraying, the temperature probe 110 monitors the temperature of the furnace body 100 by surrounding the outer wall of the furnace body 100 with an annular track 310 below, above and near the liquid surface of the molten material. As the liquid level of the molten material in the furnace body 100 gradually rises, the temperature probe 110 adjusts its position through the vertical track 320 to maintain temperature monitoring of the area below, above and near the liquid surface of the molten material in the furnace body 100.

[0069] 3. When the temperature probe 110 detects an abnormal temperature rise at a certain point on the outer wall of the furnace body 100, the movable spray head 420 located at the top of the shell 200 moves to the abnormally high temperature point via the track assembly 300 to spray the outer wall of the furnace body 100 to cool it down. The flow valve 440 adjusts the spray volume according to the temperature detected by the temperature probe 110. At the same time, the alarm sends an alarm to the outside to prompt the staff to detect and deal with the internal problems of the furnace body 100 in a timely manner.

[0070] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0071] This invention solves the technical problem that existing electric arc furnace outer wall temperature sensing and alarm spray devices are inaccurate in detecting the temperature of the outer wall of the furnace body and have poor local cooling effect during the electric arc furnace melting process, thus affecting the yield of fused α-alumina bricks. It achieves the technical effect of enhancing the accuracy of temperature detection of the outer wall of the furnace body and the local cooling effect during the electric arc furnace melting process, thereby improving the yield of fused α-alumina bricks. Example 2

[0072] The above embodiments revealed the following problems during the experiment: When water comes into contact with the high-temperature outer wall of the furnace body 100, a large amount of water vapor is generated during evaporation and cooling. Because of the shell 200, the water vapor can only be discharged through the openings at the top and bottom of the shell 200, which slows down the water vapor discharge rate. When only the fixed spray ring 410 is used for cooling spraying, all the generated water vapor can be discharged from the shell 200. However, when the moving spray head 420 is used for cooling spraying in key areas, the amount of water vapor generated increases sharply and cannot be discharged completely. It accumulates inside the shell 200, causing the air pressure inside the shell 200 to rise, which impacts the shell 200, thereby producing noise and vibration, and affecting the service life of the shell 200.

[0073] To address the aforementioned issues, this embodiment modifies the movable sprinkler head 420 based on the previous embodiment.

[0074] like Figures 4 to 8 As shown, the mobile spray head 420 includes a cooling head 510, a baffle plate 520, an inlet pipe 530, and a return pipe 540.

[0075] The cooling head 510 is drum-shaped and is movably connected to the track assembly 300 to provide a space for cooling water.

[0076] The baffle plate 520 consists of multiple bent bimetallic sheets that lean against each other. The sheet closer to the furnace body 100 is made of iron, and the sheet closer to the shell 200 is made of copper. When the baffle plate 520 is affected by high temperature, it bends towards the iron side. When the baffle plate 520 returns to normal temperature, it bends towards the copper side. The baffle plate 520 is fixed to the top of the cooling head 510 and is used to retract when it is close to the outer wall of the furnace body 100 where the temperature rises abnormally. When the baffle plate 520 retracts, it can abut against the outer wall of the furnace body 100 to block the evaporated water vapor in the cooling head 510.

[0077] Preferably, to further enhance the water-blocking effect of the baffle plate 520 on the cooling head 510, the baffle plate 520 is trapezoidal in shape;

[0078] One end of the water inlet pipe 530 is fixedly connected to the inside of the cooling head 510, and the other end is connected to the circulating water channel, which is used to transport water to the cooling head 510.

[0079] The return water pipe 540 is sleeved outside the inlet water pipe 530. One end near the circulating water channel is connected to the water pump motor, and the other end near the furnace body 100 is connected to the inside of the cooling head 510. The diameter of the return water pipe 540 is twice the diameter of the inlet water pipe 530. It is used to extract water that enters the cooling head 510 through the inlet water pipe 530 and water vapor generated by evaporation.

[0080] Preferably, the inlet pipe 530 and the return pipe 540 are provided with support members to prevent changes in pipe diameter due to suction.

[0081] Only step 3 in the above embodiments is modified:

[0082] When the temperature probe 110 detects an abnormal temperature rise at a certain point on the outer shell of the furnace body 100, the cooling head 510 in the movable spray head 420 located at the top of the shell 200 moves to the abnormally high temperature point via the track assembly 300. When the baffle plate 520 is affected by the high temperature, it bends inward and forms a confined space by contacting the outer wall of the furnace body 100. Water is transported to the inside of the cooling head 510 through the water inlet pipe 530. The water contacts the outer wall of the furnace body 100, reducing the temperature of the outer wall of the furnace body 100 and generating a large amount of water vapor. The water and water vapor are blocked by the baffle plate 520, slowing down the loss. The water and water vapor in the cooling head 510 are extracted through the return water pipe 540. The water extracted by the return water pipe 540 enters the circulating water channel. When the abnormal temperature of the outer wall of the furnace body 100 is relieved, the cooling head 510 returns to its original position via the track assembly 300. After the temperature returns to normal, the baffle plate 520 bends back to its original position.

[0083] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0084] This solves the technical problem of a large amount of water vapor being generated in a short time when the cooling water comes into contact with the outer wall of the high-temperature furnace during the operation of the moving spray head. The water vapor cannot be discharged in time, causing impact on the shell and resulting in noise and vibration. The solution reduces the amount of water vapor generated in a short time flowing into the shell and allows for timely discharge, thus avoiding impact on the shell.

[0085] Technical effects that avoid noise and vibration.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mobile electric arc furnace outer wall temperature sensing alarm spray device, comprising a furnace body (100) and a temperature probe (110), characterized in that, It also includes a housing (200), a track assembly (300), and a spray assembly (400). The shell (200) is fitted outside the furnace body (100) and has a U-shaped longitudinal section, used to support the track assembly (300) and the spray assembly (400). The track assembly (300) is fixedly connected to the inner surface of the shell (200). Its top is higher than the highest point of the molten material inside the furnace body (100), and its bottom is lower than the height of the raw material inside the furnace body (100). It is used to support the temperature probe (110) to move on the outer wall of the furnace body (100). There are multiple temperature probes (110) distributed on the track assembly (300). The spray assembly (400) includes a fixed spray ring (410) and a movable spray head (420). The fixed spray ring (410) is an annular water pipe fixed to the top of the shell (200) and surrounding the furnace body (100), and multiple spray nozzles are arranged on the fixed spray ring (410); The movable spray head (420) can be moved via the track assembly (300) to spray water onto the location where the temperature of the furnace body (100) is abnormally high, as detected by the temperature probe (110). The track assembly (300) includes a circular track (310) and a vertical track (320); The annular track (310) consists of multiple sets of circular tracks fixed to the inner surface of the housing (200); The vertical track (320) consists of multiple sets of straight tracks fixed on the inner surface of the housing (200). The top of the vertical track (320) is connected to the top of the ring track (310), and the bottom of the vertical track (320) is connected to the bottom of the ring track (310). The vertical track (320) and the ring track (310) intersect each other. The movable spray head (420) includes a cooling head (510), a baffle plate (520), an inlet pipe (530), and a return pipe (540). The cooling head (510) is drum-shaped and is movably connected to the track assembly (300); The baffle plate (520) consists of multiple bent bimetallic sheets that lean against each other. The sheet near the furnace body (100) is made of iron, and the sheet near the shell (200) is made of copper. When the baffle plate (520) is affected by high temperature, it bends towards the iron side. When the baffle plate (520) returns to normal temperature, it bends towards the copper side. The baffle plate (520) is fixed to the top of the cooling head (510) and is used to retract when it is close to the outer wall of the furnace body (100) where the temperature rises abnormally. When the baffle plate (520) retracts, it can abut against the outer wall of the furnace body (100). One end of the water inlet pipe (530) is fixedly connected to the inside of the cooling head (510), and the other end is connected to the circulating water channel to transport water into the cooling head (510); The return water pipe (540) is sleeved outside the inlet water pipe (530). One end near the circulating water channel is connected to the water pump motor, and the other end near the furnace body (100) is connected to the inside of the cooling head (510). The diameter of the return water pipe (540) is twice the diameter of the inlet water pipe (530), and it is used to extract water that enters the cooling head (510) through the inlet water pipe (530) and water vapor generated by evaporation.

2. The mobile electric arc furnace outer wall temperature sensing alarm spray device as described in claim 1, characterized in that, The housing (200) further includes a sandwich (220) with a filler (230) between the sandwich (220) for maintaining the temperature of the housing (200), the filler (230) being paraffin wax.

3. The mobile electric arc furnace outer wall temperature sensing alarm spray device as described in claim 1, characterized in that, The spray assembly (400) also includes a water supply pipe (430) and a flow valve (440). One end of the water supply pipe (430) is connected to the circulating water channel, and the other end is connected to the fixed spray ring (410), and is connected to the movable spray head (420) through the hose. The flow valves (440) are respectively connected to the water supply pipe (430) of the fixed spray ring (410) and the hose of the movable spray head (420). The flow valve (440) connected to the fixed spray ring (410) adjusts the spray volume according to the overall temperature of the furnace body (100). The flow valve (440) connected to the hose of the movable spray head (420) adjusts the spray volume according to whether the furnace body temperature detected by the temperature probe (110) rises abnormally.

4. The mobile electric arc furnace outer wall temperature sensing alarm spray device as described in claim 1, characterized in that, The nozzle angle of the fixed spray ring (410) is tilted downwards at 15 to 25 degrees, so that the sprayed water flows downwards along the outer wall of the furnace body (100).

5. The mobile electric arc furnace outer wall temperature sensing alarm spray device as described in claim 1, characterized in that, The movable spray head (420) maintains a distance of 5 to 10 centimeters from the furnace body (100) when spraying.

6. The mobile electric arc furnace outer wall temperature sensing alarm spray device as described in claim 1, characterized in that, The water baffle (520) is trapezoidal in shape.

7. The mobile electric arc furnace outer wall temperature sensing alarm spray device as described in claim 1, characterized in that, The inlet pipe (530) and return pipe (540) are provided with support members to prevent changes in pipe diameter due to suction.

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