Intelligent sand sealing device for electrode of electric furnace

Abstract

The utility model discloses a kind of intelligent sand sealing devices for electric furnace electrode, including sand sealing device, sensing unit and control unit, the sand sealing device includes sleeve, explosion-proof motor, scraper, double-arm connecting rod and rotary guide rail, sleeve outside is sleeve wall, explosion-proof motor is installed in sleeve wall outside, double-arm connecting rod is connected by mechanical occlusion with explosion-proof motor, rotary guide rail is connected on the annular groove in the lower part of double-arm connecting rod by ball bearing, scraper is connected with double-arm connecting rod. The sensing unit includes pressure detection module, infrared temperature sensing module, thickness detection module, gas detection module and smoke and fire identification module, the control unit includes explosion-proof box, and industrial computer host, communication module, drive module, audible and visual alarm module, one-key start-stop button and power module are integrated in explosion-proof box. Control unit is installed in the high place of wall body or column body away from heat source, and sand sealing device and sensing unit information transmission are connected to control unit by explosion-proof tube wiring.

Description

Technical Field

[0001] This utility model belongs to the technical field of sealing devices for yellow phosphorus electric furnaces, specifically relating to an intelligent sand sealing device for electric furnace electrodes. Background Technology

[0002] Yellow phosphorus is an important basic industrial raw material. Industrially, it is used to produce industrial phosphoric acid, food additive phosphoric acid, phosphates, phosphate fertilizers, rodenticides, and pesticides. In the military, it is often used to make smoke bombs. Currently, the electric furnace method remains the mainstream technology for producing yellow phosphorus in my country. The electric furnace method involves mixing phosphate rock, coke, and silica in a certain proportion and placing the mixture into an electric furnace. Multiple electrode rods are inserted into the furnace through holes at the top to discharge electricity.

[0003] In the electric arc furnace (EAF) production of yellow phosphorus, the electrode rod's descent within the furnace requires buffer space, resulting in gaps between the electrode rod and the furnace top. The industry commonly uses sand seals to plug these gaps. However, due to the inherent randomness in the properties, density, angle, and melting of the charge within the furnace, pressure fluctuations can occur, causing high-temperature, high-pressure media such as carbon monoxide, phosphine, and phosphorus vapors to breach the sand seal. Currently, domestic yellow phosphorus producers manually reseal the sand seal on-site, exposing workers to hazardous conditions and posing risks of burns, poisoning, and other injuries. Therefore, it is necessary to propose an intelligent sand-sealing device for EAF electrodes to address issues related to leakage, fire, poisoning, and environmental protection at the production site. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems and provide an intelligent sand sealing device for electric furnace electrodes. This device uses the monitoring of each module of the sensing unit to promptly use an explosion-proof motor to drive the double-arm connecting rod and scraper to flatten the sand seal. After flattening, the sand seal can be refilled to fill the gaps, thereby realizing unmanned and intelligent sand sealing operation.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an intelligent sand sealing device for electric furnace electrodes, comprising a sand sealing device, a sensing unit, and a control unit. The sand sealing device includes a sleeve, an explosion-proof motor, a scraper, a double-arm connecting rod, and a rotating guide rail. The outer part of the sleeve is the sleeve wall, and the explosion-proof motor is installed on the outer side of the sleeve wall. The double-arm connecting rod is mechanically connected to the explosion-proof motor. The rotating guide rail is connected to the annular groove at the lower part of the double-arm connecting rod through ball bearings. The scraper is connected to the double-arm connecting rod. The sensing unit includes a pressure detection module, an infrared temperature sensing module, a thickness detection module, a gas detection module, and a smoke and fire recognition module. The control unit includes an explosion-proof box, which integrates an industrial control host, a communication module, a drive module, an audible and visual alarm module, a one-button start / stop button, and a power module. The control unit is installed high on a wall or column away from heat sources. Information transmission between the sand sealing device and the sensing unit is connected to the control unit through explosion-proof conduit wiring.

[0006] Preferably, the scraper is made of insulating and high-temperature resistant mica sheet, and the scraper is connected to the double-arm connecting rod. The azimuth angle and tilt angle of the scraper can be adjusted at multiple angles as needed.

[0007] Preferably, the industrial control host can accept abnormal signals from various sensors, and after judgment, can send instructions to the drive module, audible and visual alarm and communication module.

[0008] Preferably, the communication module is compatible with 4G, LoRaWAN, and WiFi modes for communication, and can transmit the status information of the device and the sand seal in real time; the industrial control host can adjust the speed of the explosion-proof motor and the angle of the scraper according to the condition of the sand seal; the one-button start / stop button is for manually starting and stopping the explosion-proof motor.

[0009] Preferably, the thickness detection module uses a laser rangefinder and a high-temperature resistant ultrasonic sensor to measure the height of the sand layer in the sand-sealing area between the electrode and the furnace body in real time.

[0010] Preferably, the infrared temperature sensing module uses an infrared thermometer to measure the temperature of the sand layer.

[0011] Preferably, the gas detection module monitors carbon monoxide, phosphine, and phosphorus vapor in real time.

[0012] Preferably, the pressure detection module uses high-temperature resistant aerogel installed inside the sand body to monitor the pressure change of the sand seal by measuring the aerogel compression and resistance changes.

[0013] Preferably, the explosion-proof motor is connected to the sleeve wall using fixing screws, and a shock-absorbing and heat-insulating pad is installed between the explosion-proof motor and the sleeve wall.

[0014] Preferably, the double-arm connecting rod and the rotary guide rail are connected by ball bearings to maintain the stability of the connecting rod operation while maintaining flexibility.

[0015] Preferably, the smoke and fire recognition module uses video surveillance to identify smoke and flames.

[0016] Preferably, the pressure detection module uses high-temperature resistant aerogel installed inside the sand body to monitor the pressure change of the sand seal by measuring the aerogel compression and resistance changes.

[0017] The beneficial effects of this utility model are:

[0018] 1. The intelligent sand sealing device for electric furnace electrodes provided by this utility model can ensure the integrity and reliability of the sand sealing of electric furnace electrodes, prevent high temperature and high pressure gas and furnace charge splashing, and effectively improve the production environment of yellow phosphorus workshop.

[0019] 2. This utility model adopts an automatic, intelligent and safe design concept. Through the monitoring data of the sensing unit, it can level and replenish the sand seal in real time, replacing the manual inspection of sand sealing operations and promoting unmanned management of yellow phosphorus production workshops.

[0020] 3. This utility model can monitor, analyze, and control the sand seal of electric furnaces 24 hours a day, effectively improving the risk prevention and control capabilities of electric furnaces against leakage, fire, explosion and poisoning.

[0021] 4. This utility model proposes a diversified sensing module for electrode sand-sealed bodies, which makes it easier for yellow phosphorus enterprises to set up sensing schemes based on workshop layout, cost control and risk level. The project is highly feasible and easy to apply and promote. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an intelligent sand sealing device for electric furnace electrodes according to this utility model;

[0023] Figure 2 This is a schematic diagram of the layout structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the scraper of this utility model;

[0025] Figure 4 This is a schematic diagram illustrating the functional principle of this utility model;

[0026] Figure 5 This is a schematic diagram showing the connection between the scraper and the double-arm connecting rod of this utility model;

[0027] Figure 6 This is a schematic diagram of the mechanical interlocking structure of this utility model;

[0028] Figure 7This is a schematic diagram of the connection between the rotary guide rail and the cylinder wall of this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the double-arm connecting rod of this utility model;

[0030] Figure 9 This is a schematic diagram of the connection between the double-arm connecting rod and the rotating guide rail of this utility model via ball bearings.

[0031] Explanation of reference numerals in the attached diagram: 1. Electrode; 2. Sand seal; 3. Sleeve wall; 4. Explosion-proof motor; 5. Scraper; 6. Double-arm connecting rod; 7. Rotary guide rail; 8. Mechanical interlocking structure; 9. Pressure detection module; 10. Explosion-proof wiring conduit; 11. Thickness detection module; 12. Infrared temperature sensing module; 13. Gas detection module; 14. Smoke and fire recognition module; 15. Explosion-proof box; 16. One-button start / stop; 17. Universal fixing hole; 18. Insulating high-temperature resistant mica sheet; 19. Connecting ball head; 20. Cylinder wall track; 21. Annular groove; 22. Ball bearing. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0033] like Figures 1 to 9 As shown, this utility model provides an intelligent sand sealing device for electric furnace electrodes, including a sand sealing device, a sensing unit, and a control unit. The sand sealing device includes a sleeve, an explosion-proof motor 4, a scraper 5, a double-arm connecting rod 6, and a rotary guide rail 7. The outside of the sleeve is the sleeve wall 3, and the explosion-proof motor 4 is installed on the outside of the sleeve wall 3. The double-arm connecting rod 6 is mechanically connected to the explosion-proof motor 4. The rotary guide rail 7 is connected to the annular groove 21 at the lower part of the double-arm connecting rod 6 through ball bearings 22. The scraper 5 is connected to the double-arm connecting rod 6 through a connecting ball head 19. The sensing unit includes a pressure detection module 9, a thickness detection module 11, an infrared temperature sensing module 12, a gas detection module 13, and a smoke and fire recognition module 14. The control unit includes an explosion-proof box 15, which integrates an industrial control host, a communication module, a drive module, an audible and visual alarm module, a one-button start / stop button 16, and a power module. The control unit is installed high on a wall or column away from heat sources. The sand sealing device and the information transmission of the sensing unit are connected to the control unit through explosion-proof conduit wiring.

[0034] like Figure 1 and Figure 2As shown, an electrode 1 is installed on the electric furnace, which is a mature existing device in this field. A sleeve wall 3 is fitted onto the electrode 1, and the gap between the electrode 1 and the sleeve wall 3 is sealed with a sand seal 2. During the process, factors such as pressure fluctuations inside the electric furnace can cause the sand seal 2 to break, resulting in the ejection of toxic gases and furnace charge, along with flames. To prevent the sand seal 2 from breaking, its status should be monitored at different levels using multiple sensing methods, thereby driving the explosion-proof motor 4 to perform the sand sealing operation.

[0035] In this embodiment, the electric furnace is an existing electric furnace device. Mechanical engagement is achieved through the existing mechanical engagement structure 8. The double-arm connecting rod 6 is connected to the explosion-proof motor 4 via the mechanical engagement structure 8. The upper part of the rotating guide rail 7 is connected to the annular groove 21 at the lower part of the double-arm connecting rod 6 via a ball bearing 22, while the lower part remains on the existing cylinder wall track 20 of the sleeve. The cylinder wall track 20 is a groove located at the upper end of the inner wall of the sleeve. The scraper 5 is provided with a universal fixing hole 17. The upper surface of the scraper 5 is connected to the double-arm connecting rod 6 via a connecting ball head 19 connected to the universal fixing hole 17. The aerogel pressure sensor 9 is installed inside the sand seal 2. The sensing unit is installed according to the actual production site environment and requirements.

[0036] The double-arm connecting rod 6 is divided into upper and lower parts. The upper part of the double-arm connecting rod 6 has a fixed scraper 5, and the lower part of the double-arm connecting rod 6 has a circular disc structure. The outer surface of the lower part of the double-arm connecting rod 6 is gear-shaped and meshes with the gear in the mechanical meshing structure 8. The annular groove 21 is located in the lower part of the double-arm connecting rod 6. When the explosion-proof motor 4 is working, it can drive the double-arm connecting rod 6 to rotate. The bottom of the double-arm connecting rod 6 is connected to the rotating guide rail 7 through the ball bearing 22. When the double-arm connecting rod 6 rotates, it contacts the cylinder wall track 20 through the rotating guide rail 7, so that the double-arm connecting rod 6 can only rotate. During the operation, the double-arm connecting rod 6 drives the scraper 5 to complete the sand sealing.

[0037] The explosion-proof enclosure 15 of the control unit is installed on a wall or column away from heat sources. The control unit, explosion-proof motor 4, and various sensors are connected by wiring through explosion-proof conduit 10. A one-button start / stop button 16 is installed on the explosion-proof enclosure 15. The one-button start / stop button 16 is located at the output end of the power module and is used to control the power on and off of the entire device. An emergency stop can be performed by using the one-button start / stop button 16 located on the surface of the explosion-proof enclosure 15.

[0038] The scraper blade 5 is made of insulating, high-temperature resistant mica sheet. When the scraper blade 5 is connected to the double-arm connecting rod 6, its azimuth and tilt angles can be adjusted at multiple angles as needed. Specifically, the universal fixing hole 17 is a threaded hole, which is matched with the existing connecting ball head 19. The azimuth and tilt angles of the scraper blade 5 are adjusted through the connecting ball head 19. One end of the connecting ball head 19 is connected to the scraper blade 5, and the other end is connected to the universal fixing hole 17. When using the scraper blade 5, if the angle needs to be changed, first loosen the knob of the connecting ball head 19. After the operator approves the adjustment of the scraper blade 5's angle, tighten the connecting ball head 19.

[0039] The industrial control host can accept abnormal signals from various sensors, and after judgment, can send instructions to the drive module, audible and visual alarm, and communication module. In this embodiment, the industrial control host adopts the existing embedded industrial computer C5760S-R6. The drive module adopts the existing PTC start relay, which is the switch to start the explosion-proof motor 4. The PTC start relay is electrically connected to both the industrial control host and the explosion-proof motor 4. The audible and visual alarm module adopts the existing explosion-proof audible and visual alarm DC24V. The power supply module adopts the existing Spad lithium battery, such as YTQGL12150 (12.8V / 150Ah).

[0040] The communication module supports 4G, LoRaWAN, and WiFi communication modes, and can transmit the status information of the device and the sand seal in real time. The industrial control host can adjust the speed of the explosion-proof motor 4 and the angle of the scraper 5 according to the sand seal condition. The one-button start / stop button 16 is used to manually start and stop the explosion-proof motor 4. In this embodiment, the communication module is an existing mature product, integrating 4G, LoRaWAN, and WiFi communication devices, and adopts the existing LoRa outdoor waterproof gateway F8L10GW-L.

[0041] The thickness detection module 11 includes a laser rangefinder sensor, which measures the height of the sand layer in the sand-sealing area between the electrode 1 and the furnace body in real time. In this embodiment, the laser rangefinder sensor is a laser rangefinder. The laser rangefinder is the existing explosion-proof laser rangefinder TSWT-A-EX.

[0042] Infrared temperature sensing module 12 is an infrared thermal imaging device that uses an infrared thermometer to measure the temperature of the sand layer. Gas detection module 13 is a gas detector that monitors carbon monoxide, phosphine, and phosphorus vapor in real time. Smoke and fire recognition module 14 is a smoke and fire video recognition device. In this embodiment, the infrared imaging device is the existing single-light infrared thermal imager SS-ED-S2. The gas detector is the existing CROWCON carbon monoxide detector from the UK, which uses tunable laser absorption spectroscopy (TDLAS) technology. The smoke and fire video recognition device uses the existing explosion-proof flame detector A716 / UVIR2.

[0043] The pressure detection module 9 includes an aerogel pressure sensor, which uses high-temperature resistant aerogel disposed inside the sand body. Pressure changes in the sand seal are monitored by measuring the aerogel compression and resistance changes. In this embodiment, the aerogel pressure sensor is an existing flexible thin-film pressure sensor S18-100K. The explosion-proof motor 4 is connected to the sleeve wall 3 using fixing screws, and a shock-absorbing and heat-insulating pad is installed between the explosion-proof motor 4 and the sleeve wall 3.

[0044] The double-arm connecting rod 6 and the rotary guide rail 7 are connected by ball bearings to maintain the stability of the connecting rod operation while maintaining flexibility.

[0045] like Figure 2 As shown, abnormalities in the sand seal can be characterized by indicators such as sand seal pressure, temperature, thickness, and smoke / fire. For example, in cases of abnormal sand seal conditions, fluctuations in internal pressure can be detected by an aerogel pressure sensor located inside the sand seal, and the signal can be processed. Abnormal changes in the height of the sand seal surface can be detected by a laser rangefinder in the thickness detection module 11 located at a high position, and the signal can be processed. High temperatures inside the furnace can be transmitted upwards through the gap between electrode 1 and the sleeve wall 3. Temperature can be measured using an infrared thermal imaging device, and the signal can be output to determine if a limit has been reached. Toxic and harmful gases generated inside the furnace, such as carbon monoxide, phosphorus vapor, and phosphine, can escape upwards through the gaps. Gas detectors can detect these gases, and the signal can be output to determine if a warning concentration has been reached. Flames will burst out of the furnace, damaging facilities and equipment, and potentially igniting surrounding materials, facilities, and buildings. At this point, on-site video recognition equipment identifies the flames and smoke, outputting a signal upon detection. The more sand seal status monitoring indicators there are, the more accurately abnormal sand seal conditions can be detected.

[0046] like Figure 3As shown, the scraper blade 5 has a two-plane vertical joint structure, with both the upper and lower surfaces made of insulating high-temperature resistant mica sheet 18, which has the advantages of corrosion resistance, high insulation, high temperature resistance, and high strength. The upper surface of the scraper blade 5 has a "mushroom" shape combining trapezoids and squares, including square and trapezoidal areas. Four universal fixing holes 17 are distributed at the four corners of the square area of ​​the scraper blade 5, and five universal fixing holes 17 are distributed in a straight line in the trapezoidal area. The universal fixing holes 17 and the connecting ball head 19 have two functions: first, they serve as a connecting structure to fix the scraper blade 5 and the double-arm connecting rod 6; second, the angle of the scraper blade 5 can be adjusted using the connecting ball head 19. After receiving the signals from each sensor, the industrial control host sends a signal to the driver to start the explosion-proof motor after logical judgment. This process can adjust the tilt angle between the scraper blade 5 and the upper surface of the sleeve wall 3, the angle between the scraper blade 5 and the double-arm connecting rod 6, and the operating speed of the scraper blade 5 according to the actual situation of the sand seal.

[0047] The working process of this utility model is as follows:

[0048] The abnormal signal outputs of the aforementioned sensors are transmitted through explosion-proof conduit 10. All sensor devices and explosion-proof motors 4 are connected to the explosion-proof enclosure 15 of the control unit via the explosion-proof conduit 10. Cables are installed inside the explosion-proof conduit 10 for electrical connections between the corresponding devices. The explosion-proof enclosure 15 of the control unit integrates an industrial control host, a drive module, an audible and visual alarm system, and a communication module. The signals output by the aforementioned sensors are transmitted to the industrial control host, which performs logical judgments based on the received signal data. After judgment, the industrial control host outputs command signals to the drive module, the audible and visual alarm system, and the communication module. Upon receiving the command signal from the industrial control host, the drive module controls the explosion-proof motor 4 to operate. Upon receiving the signal from the industrial control host, the audible and visual alarm system issues an audible and visual alarm to provide warnings and alerts. Upon receiving the signal from the industrial control host, the communication module reports to the central control room and production personnel via LoRaWAN, 4G, and WiFi multi-mode communication. The explosion-proof enclosure 15 also integrates a one-button start / stop button 16, which can be used to control the explosion-proof motor 4 via an emergency start / stop button 16 located on the surface of the enclosure. After receiving the action signal from the industrial control host, the drive module sends a signal to activate the explosion-proof motor 4. The explosion-proof motor 4 is connected to the mechanical engagement structure 8 and the double-arm connecting rod 6, as shown below. Figure 8 As shown, the double-arm connecting rod 6 has an upper and lower layer structure. The explosion-proof motor causes the lower connecting rod to move through the gears of the mechanical meshing structure. The moving lower connecting rod then drives the upper connecting rod to move. The lower end of the lower connecting rod is connected to two rotating slide rails 7 through ball bearings. The lower part of the rotating slide rail is fixed in the cylinder wall track 20 of the sleeve. The rotating slide rail can keep the double-arm connecting rod stable during operation.

[0049] like Figure 4As shown, this utility model not only provides an intelligent sand sealing device for electric furnace electrodes, but also innovates the design of the device's functions. Figure 4 The design layout of this utility model is shown. The sensing unit uses pressure detection, thickness detection, gas detection, infrared temperature sensing, or smoke and fire recognition modules to perform multi-dimensional sensing of the sand seal's state. The sensing unit transmits the signals from the relevant sensors to the industrial control host located in the explosion-proof box of the control unit. After logical judgment, the industrial control host transmits the action signal to the audible and visual alarm module to trigger an audible and visual alarm. After being transmitted to the communication module, the alarm information is transmitted to the central control room and relevant management personnel. If necessary, the one-button start / stop button 16 can be pressed manually to control the working state of the sand sealing device. The command signal is transmitted to the drive module to start the explosion-proof motor 4. The rotation of the explosion-proof motor 4 drives the double-arm connecting rod 6 through mechanical engagement. The installed rotating guide rail assists in adjusting the angle and maintaining stability of the double-arm connecting rod during operation. The moving double-arm connecting rod 6 drives the scraper 5 to level and replenish the sand seal. To restore the stable sand seal state, the explosion-proof motor 4 stops operating through the above process.

[0050] like Figure 5 As shown, the universal fixing hole 17 on the scraper 5 can be connected to the connecting ball head 19. The other end of the connecting ball head 19 is connected to the double arm connecting rod 6. When it is necessary to adjust the angle of the scraper 5, the tightness of the connecting ball head 19 can be adjusted.

[0051] like Figure 6 As shown, the mechanical engagement structure 8 is a gear-like structure between the explosion-proof motor 4 and the double-arm connecting rod 6. The explosion-proof motor 4 drives the double-arm connecting rod 6 to move through this gear-like structure. In this embodiment, the mechanical engagement structure 8 is a gear, and the part of the double-arm connecting rod 6 connected to the mechanical engagement structure 8 is a gear-shaped structure. The mechanical engagement structure 8 is sleeved on the rotating shaft end of the explosion-proof motor 4, and the outer surface of the mechanical engagement structure 8 is engaged with the double-arm connecting rod 6 as a gear. When the explosion-proof motor 4 is working, it drives the double-arm connecting rod 6 to move through the mechanical engagement structure 8.

[0052] like Figure 7 As shown, the existing cylinder wall track 20 on the sleeve wall 3 is an annular groove on the cylinder wall. The rotating guide rail 7 is connected to the sleeve wall 3 by being locked on the existing cylinder wall track 20 at its lower part, so that the rotating guide rail 7 can move in the sleeve wall 3 through the existing track 20.

[0053] like Figure 8 As shown, the double-arm connecting rod 6 has a layered structure, with both the upper and lower layers being flat metal parts. The upper connecting rod is welded with a connecting ball head 19 for connection with the universal fixing hole 17 on the scraper 5.

[0054] like Figure 9As shown, the lower layer of the double-arm connecting rod 6 has an annular groove 21 for connecting with the ball bearing 22 on the upper part of the rotary guide rail 7. When the explosion-proof motor 4 drives the double-arm connecting rod 6 to move through the mechanical engagement structure 8, it drives the rotary guide rail 7 to move on the existing cylinder wall track 20. During this process, the rotary guide rail 7 plays the role of maintaining the stability of the movement and fixing the double-arm connecting rod 6.

[0055] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. An intelligent sand sealing device for electric furnace electrodes, characterized in that: The system includes a sand sealing device, a sensing unit, and a control unit. The sand sealing device includes a sleeve, an explosion-proof motor (4), a scraper (5), a double-arm connecting rod (6), and a rotating guide rail (7). The outside of the sleeve is the sleeve wall (3). The explosion-proof motor (4) is installed on the outside of the sleeve wall (3). The double-arm connecting rod (6) is mechanically connected to the explosion-proof motor (4). The rotating guide rail (7) is connected to the annular groove (21) at the lower part of the double-arm connecting rod (6) through ball bearings (22). The scraper (5) is connected to the double-arm connecting rod (6). The sensing unit includes a sand sealing device, a sensing unit, and a control unit. The sensing unit includes a pressure detection module (9), a thickness detection module (11), an infrared temperature sensing module (12), a gas detection module (13), and a smoke and fire identification module (14). The control unit includes an explosion-proof box (15), which integrates an industrial control host, a communication module, a drive module, an audible and visual alarm module, a one-button start / stop button (16), and a power module. The control unit is installed at a high position on a wall or column away from the heat source. The information transmission between the sand sealing device and the sensing unit is connected to the control unit through an explosion-proof conduit.

2. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The scraper (5) is made of insulating and high-temperature resistant mica sheet. The scraper (5) is connected to the double-arm connecting rod (6). The azimuth angle and tilt angle of the scraper (5) can be adjusted at multiple angles as needed.

3. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The industrial control host can accept abnormal signals from various sensors, and after judgment, it can send instructions to the drive module, audible and visual alarm and communication module.

4. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The communication module is compatible with 4G, LORAWAN and WiFi modes for communication and can transmit the status information of the device and sand seal in real time; the industrial control host can adjust the speed of the explosion-proof motor (4) and the angle of the scraper (5) according to the sand seal condition; the one-button start and stop button (16) is used to manually start and stop the explosion-proof motor (4).

5. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The thickness detection module (11) uses a laser rangefinder and a high-temperature resistant ultrasonic sensor to measure the height of the sand layer in the sand sealing area between the electrode and the furnace body in real time.

6. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The infrared temperature sensing module (12) uses an infrared thermometer to measure the temperature of the sand layer.

7. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The gas detection module (13) monitors carbon monoxide, phosphine and phosphorus vapor in real time.

8. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The pressure detection module (9) uses high-temperature resistant aerogel to be placed inside the sand body, and monitors the pressure change of the sand seal by the compression and resistance change of the aerogel.

9. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The explosion-proof motor (4) is connected to the sleeve wall (3) using fixing screws, and a shock-absorbing and heat-insulating pad is installed between the explosion-proof motor (4) and the sleeve wall (3).

10. The intelligent sand sealing device for electric furnace electrodes according to claim 1, characterized in that: The double-arm connecting rod (6) and the rotary guide rail (7) are connected by ball bearings to maintain the stability of the connecting rod operation while maintaining flexibility.

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