Intelligent device for sealing a coal charging hole in a furnace top

Abstract

An intelligent sealing device for the coal charging hole on the top of a coke oven is applied to the coal charging car. This invention consists of an upper guide sleeve, a lower guide sleeve, a cover lifting machine, a coal charging hole cleaning machine, a cover cleaning scraper, a slurry pouring system, a moving trolley, and a guide rail frame. The upper and lower guide sleeves cooperate to form three sealing points. A dry-wet separation method is adopted to effectively avoid the problem of slurry clogging the pipes. Before use, water and dry powder are stored separately. During use, powder and water are quantitatively delivered to the mixer and mixed. The mixed slurry is released into the gap between the cover and the coal charging hole seat. After slurry pouring, the mixer is cleaned with a small amount of clean water. This design has the following advantages: 1. It greatly reduces the labor intensity of workers and reduces the harm to the human body caused by high temperatures and smoke. 2. It significantly reduces the leakage of harmful gases, effectively protecting the environment. 3. It has a high degree of automation, enabling unmanned operation of sealing the coal charging hole on the top of the coke oven.

Description

Technical Field

[0001] This invention belongs to the technical field of the metallurgical industry, and in particular, it is a sealing device for the coal charging hole on the coal charging car on the top of a coke oven. Background Technology

[0002] In the coking process of a coke oven, coal needs to be introduced into the carbonization chamber through the charging hole at the top of the oven. This process requires a tight seal to prevent harmful gases from escaping and polluting the environment. At the same time, the harsh working environment of high temperature and dust at the top of the oven also poses a significant risk of injury to on-site operators. Therefore, there is an urgent need for highly automated intelligent devices in actual coke oven production to solve the sealing problem during the charging process and the safety and health issues of workers in harsh environments. Summary of the Invention

[0003] The purpose of this invention is to develop an intelligent sealing device for the coal charging hole at the top of the furnace to address the above-mentioned problems.

[0004] This intelligent sealing device for the top coal charging hole of a top-charging coke oven is installed on the coal charging car. Its main components include: upper guide sleeve, lower guide sleeve, cover opening machine, coal charging hole cleaning machine, furnace cover cleaning scraper, grouting system, moving trolley, and guide rail frame. The sealing and automation of the coal charging process are achieved through the automated control of these components. Its structural features are:

[0005] The upper and lower guide sleeves form three sealing points. The first sealing point uses an annular graphite packing ring for sealing, which is installed between the fixed sleeve and the telescopic sleeve of the upper guide sleeve. The fixed sleeve and the telescopic sleeve are connected by a hydraulic cylinder, and the telescopic sleeve can extend and retract vertically through the cooperation of a slide rail and a slider. The second sealing point uses a spherical and conical seal, and the cooperation of the spherical and conical seals can cope with vertical errors. The third sealing point uses a cutting edge seal, that is, a steel ring is added to the outside of the coal charging hole seat, which forms a third seal with the cutting edge at the bottom of the lower guide sleeve. The steel ring itself is relatively wide, which can cope with horizontal errors. The cutting edge and the steel ring are tightly fitted together under continuous pressure.

[0006] The aforementioned cover-opening machine and coal charging hole cleaning machine achieve automatic centering and automatic reset functions with the furnace cover and coal charging hole seat through mechanical means, thereby solving the alignment problem between the coal charging hole seat and the equipment. After cleaning the coal charging hole seat, it can ensure smooth flow of mud during the grouting process.

[0007] The furnace cover cleaning scraper is fixedly installed on the lower part of the guide rail frame. The scraper is used to clean the furnace cover by rotating in conjunction with the scraper. The scraper can compensate for the positioning error by spring compensation. After cleaning the furnace cover, the slurry flow can be ensured to be smooth for the next grouting.

[0008] The grouting system is used to mix a certain amount of slurry to seal the gap between the furnace cover and the coal charging port seat, ensuring a tight seal after the furnace cover is closed. This part adopts a dry-wet separation method, effectively avoiding the problem of slurry clogging the pipes. Before use, water and dry powder are stored separately. During use, powder and water are quantitatively delivered into the mixer and mixed. The mixed slurry is then released into the gap between the furnace cover and the coal charging port seat. After grouting, the mixer is cleaned with a small amount of clean water.

[0009] The mobile trolley section is used to carry the guide sleeve, cover lifting machine, coal loading hole cleaning machine, and grouting system. The reciprocating motion of the mobile trolley is used to align the various functional parts.

[0010] The guide rail frame is used to connect the coal loading car and support the horizontal movement of the mobile trolley. It adopts a frame structure, which has higher strength and makes the equipment operation more stable.

[0011] The operating procedure for the intelligent sealing device for the coal charging hole at the top of this furnace is as follows:

[0012] 1. Open the furnace lid;

[0013] 2. Loading coal;

[0014] 3. Clean the coal charging hole seat and the furnace cover;

[0015] 4. Close the furnace cover and automatically pour grout;

[0016] 5. Reset.

[0017] The beneficial effects of this invention are:

[0018] 1. It greatly reduces the labor intensity of workers and reduces the harm to the human body caused by high temperature and smoke.

[0019] 2. It significantly reduces the leakage of harmful gases and effectively protects the environment.

[0020] 3. It has a high degree of automation and can achieve unmanned operation of sealing the coal charging hole on the furnace top. Attached Figure Description

[0021] Appendix Figure 1 A schematic diagram illustrating the initial position of the furnace lid opening action;

[0022] Appendix Figure 2 This is a schematic diagram illustrating the process of opening the furnace lid.

[0023] Appendix Figure 3 A schematic diagram showing the initial position of the coal charging action after the furnace cover opening action is completed;

[0024] Appendix Figure 4 This is a schematic diagram of the coal loading process;

[0025] Appendix Figure 5 This is a schematic diagram showing the initial state of the cleaning of the coal charging hole seat and the furnace cover after the coal charging operation is completed.

[0026] Appendix Figure 6 Schematic diagram of the cleaning process of the coal loading hole seat;

[0027] Appendix Figure 7 This is a schematic diagram illustrating the process of cleaning the furnace cover;

[0028] Appendix Figure 8 This is a schematic diagram showing the starting position of the action of closing the furnace cover and automatically pouring grout after the coal charging hole seat and furnace cover have been cleaned and the furnace cover has been cleaned.

[0029] Appendix Figure 9 This is a schematic diagram illustrating the process of closing the furnace cover and the automatic grouting operation;

[0030] Appendix Figure 10 This is a schematic diagram of the grouting system;

[0031] Appendix Figure 11 This is a diagram showing the mixer in the off state.

[0032] Appendix Figure 12 This is a schematic diagram showing the mixer in the open, slurry-releasing state.

[0033] Appendix Figure 13 This is a diagram showing the reset state after the furnace cover is closed and the automatic grouting action is completed;

[0034] The attached diagram and its components and their numbers are as follows:

[0035] 1-Guide rail frame, 2-Mobile trolley, 3-Coal charging hole cleaner, 4-Lower guide sleeve, 5-Coal charging hole seat, 6-Furnace cover, 7-Steel ring, 8-Covering machine, 9-Upper guide sleeve, 10-Grouting system, 11-Furnace cover cleaning scraper.

[0036] 3.1-Hole cleaning pressure barrel, 3.2-Hole cleaning power spring, 3.3-Hole cleaning rolling head, 3.4-Hole cleaning buffer spring, 3.5-Hole cleaning positioning rod, 3.6-Hole cleaning motor, 3.7-Hole cleaning lifting cylinder, 3.8-Scraper disc.

[0037] 4.1-Cone surface, 4.2-Lower guide sleeve power spring, 4.3-Cylinder body, 4.4Cutting edge.

[0038] 8.1-Lid-opening pressure tank, 8.2-Lid-opening power spring, 8.3-Lid-opening rolling top, 8.4-Lid-opening buffer spring, 8.5-Lid-opening positioning rod, 8.6-Lid-opening motor, 8.7-Lid-opening lifting cylinder, 8.8-Electromagnet.

[0039] 9.1-Fixed sleeve, 9.2-Hydraulic cylinder, 9.3-Graphite packing ring, 9.4-Slide rail, 9.5-Slider, 9.6-Telescopic sleeve, 9.7-Spherical body.

[0040] 10.1-Mixer, 10.2-Screw shaft one, 10.3-Screw shaft two, 10.4-Dry powder hopper, 10.5-Agitator motor, 10.6-Feeding motor, 10.7-Water pump, 10.8-Water tank, 10.9-Water pipe.

[0041] 10.1.1-Bevel Gear 1, 10.1.2-Drive Shaft, 10.1.3-Bevel Gear 2, 10.1.4-Stirring Shaft, 10.1.5 Cup Body, 10.1.6-Quick Locking Ring, 10.1.7-Spur Gear, 10.1.8-Rack Shaft, 10.1.9-Rotating Nozzle, 10.1.10-Reset Spring, 10.1.11-Spring Pressure Plate.

[0042] 11.1 - Scraper bar, 11.2 - Compression spring. Detailed Implementation

[0043] The overall structure and operating sequence of this invention are as follows: Figure 1 —Appendix Figure 13 As shown.

[0044] The main design concept of this invention revolves around sealing and unmanned operation. Emphasis is placed on the design and optimization of the sealing points of the upper guide sleeve 9 and lower guide sleeve 4 during the coal charging process to ensure their sealing performance. A grouting system 10 is designed for the sealing between the furnace cover 6 and the coal charging hole seat 5 after coal charging. This system adopts a dry-wet separation and on-the-spot mixing structure to avoid pipe blockage, thereby ensuring the stability of the grouting system. A coal charging hole cleaning machine 3 and a furnace cover cleaning scraper 11 are designed to improve the functionality of the entire system and provide strong error handling capabilities. Each functional component is independently designed and integrated to reduce the power source, thereby reducing failure points and maintenance rates. This ensures that smoke and dust overflow during and after coal charging is minimized, thus reducing pollution. Simultaneously, the coal charging process can be automated to reduce the labor intensity of workers and avoid injuries caused by harsh working conditions.

[0045] I. The overall and partial structure of this invention, as well as the functions of each part, are described below:

[0046] As attached Figure 1As shown, the guide rail frame 1 is installed and fixed on the coal charging car using a frame structure. The frame structure has undergone heat-resistant and anti-corrosion treatment to reduce deformation caused by high temperatures and increase service life. The frame structure is more stable, ensuring smooth equipment movement and accurate positioning. A rack and rollers are fixedly installed on the moving trolley 2. The rack on the moving trolley 2 is driven by a motor and gears fixedly installed on the guide rail frame 1, allowing the moving trolley 2 to reciprocate within the guide rail frame 1 along with the rollers. The coal charging hole cleaner 3, lower guide sleeve 4, cover opener 8, and automatic grouting system 10 are fixedly installed on the moving trolley 2. Through the reciprocating movement of the moving trolley 2, these four functional components can be accurately positioned relative to the coal charging hole seat 5, reducing the power source required for the drive. The downward movement of the three functional components—coal charging hole cleaner 3, lower guide sleeve 4, and cover opener 8—is accomplished by the extension of the upper guide sleeve 9, again reducing the power source required for the drive. The furnace cover cleaning scraper 11 is fixed on the guide rail frame, using a single scraper design, which is simple in structure and easy to maintain. A compression spring is used to compensate for the error between the furnace cover 6 and the cover 6. The rotation of the spring and the cover 6 can clean the debris from the cover 6 and ensure the sealing of the coal charging hole seat 5 of the cover 6. The grouting system 10 uses a method of storing water and powder separately and mixing them on the spot to avoid the slurry clogging the pipes. In addition, the grouting system 11 has shorter pipes, which also greatly reduces the phenomenon of pipe clogging.

[0047] The opening of the furnace cover 6 is accomplished automatically by the upper guide sleeve 9 and the cover-opening machine 8, as shown in the attached diagram. Figure 2As shown: Because of the existence of alignment error, the cover opening machine 8 needs to have the function of accommodating the error. The cover opening machine 8 realizes the automatic alignment function with the furnace cover 6 through mechanical structure, and can automatically reset. When the cover-opening machine 8 moves downward and contacts the misaligned furnace cover 6, the conical hole on the electromagnet 8.8 contacts the cone on the furnace cover 6, compressing the three evenly distributed cover-opening buffer springs 8.4 between the cover-opening lifting cylinder 8.7 and the cover-opening pressure barrel 8.1. This causes the three cover-opening positioning rods 8.5, evenly distributed around the cover-opening lifting cylinder 8.7, to move upward and create a gap between them and the cover-opening pressure barrel 8.1. Because of the universal ball bearing installed on the cover-opening rolling head 8.3 at the top of the cover-opening buffer springs 8.4, the cover-opening lifting cylinder 8.7 moves in the direction of the furnace cover 6's misalignment to compensate for the error. When the cover-opening machine 8 opens the furnace cover 6 and moves upward, the cover-opening positioning rods 8.5 automatically slide into the conical hole of the cover-opening pressure barrel 8.1, achieving automatic reset. This compensates for the ±40mm error in the horizontal direction of the coal charging hole seat 5. Furthermore, a limit switch is installed between the cover-opening pressure tank 8.1 and the cover-opening lifting cylinder 8.6. When the distance between them is compressed to a certain distance, that is, when the electromagnet 8.8 is in contact with the furnace cover 6, the upper guide sleeve 9 is triggered to stop pressing down. Because the limit switch measures the relative distance between the two, it can accommodate the height error of each coal loading hole seat on the furnace top. Moreover, the upward reset of the cover-opening machine 8 is achieved by four evenly distributed high-temperature resistant cover-opening power springs 8.2. The spring reset structure is simple, leak-free, and easy to maintain and replace. The electromagnet 8.8 of the cover-opening machine 8 has a rotation function, and the rotation power is transmitted by the cover-opening motor 8.6. The electromagnet 8.8 contains a conductive slip ring to prevent cable entanglement during rotation. The rotation function also pokes the furnace cover 6 before it is opened, loosening the furnace cover 6 from the coal loading hole seat 5, making it easier to open the furnace cover 6. The rotating function of the electromagnet 8.8 also serves the purpose of grinding the furnace cover 6 and the coal charging hole seat 5, in order to reduce the gap between the two.

[0048] The sealing of the coal loading process is achieved through automatic control of the upper guide sleeve 9 and the lower guide sleeve 4, as shown in the attached diagram. Figure 4As shown: The fixed sleeve 9.1 is installed at the outlet of the screw feeder. Two hydraulic cylinders 9.2 are installed on both sides of the fixed sleeve 9.1, with their tails fixed to the fixed sleeve 9.1 and their heads connected to the telescopic sleeve 9.6. Four slide rails 9.4 are fixed to the fixed sleeve 9.1, and the inner surfaces of the four slide rails 9.4 have a 45° bevel. These are precision-machined for high accuracy and strength, precisely matching the 45° bevels of the four sliders 9.5 installed on the telescopic sleeve 9.6. Simultaneous driving by the two hydraulic cylinders 9.2 ensures that the telescopic sleeve 9.6 can achieve telescopic function and balanced force distribution. The precise fit between the slide rails 9.4 and the sliders 9.6 ensures a high degree of concentricity between the telescopic sleeve 9.6 and the fixed sleeve 9.1. Three graphite packing rings 9.3 are installed between the telescopic sleeve 9.6 and the fixed sleeve 9.1. The graphite packing rings 9.3 are made of pure graphite, have high temperature resistance and good lubrication performance, and after compression, ensure good sealing between the two. The mating surface of the fixed sleeve 9.1 is also precision-machined and chrome-plated, resulting in a high degree of surface finish and enhancing the sealing performance of the telescopic sleeve 9.6 and the fixed sleeve 9.1. The spherical body 9.7 below the telescopic sleeve 9.6 is precision-machined, achieving a high degree of surface finish and roundness. Made of high-temperature resistant 310S stainless steel, it precisely mates with the conical body 4.1 to form a good sealing surface. The conical body 4.1, cast from vermicular graphite cast iron, has good temperature resistance, and precision machining ensures the accuracy of the sealing surface. The cylinder 4.3 is mounted on four lower guide sleeve power springs 4.2. The upward reset of the cylinder 4.3 is achieved by four evenly distributed high-temperature resistant lower sleeve power springs 8.2. This spring-loaded reset design is simple, leak-free, and easy to maintain and replace. Furthermore, the cylinder 4.3 is mounted on the guide sleeve power springs 4.2 in a slightly wobbly state, facilitating the absorption of positional errors during the mating of the spherical body 9.7 and the conical body 4.1. After the cutting edge 4.4 aligns with the steel ring 7 laid around the coal charging hole seat 6, the hydraulic cylinder 9.2 continues to press down until the pressure in the hydraulic circuit reaches a certain value, at which point the pressing action stops. At this point, the accumulator in the hydraulic circuit ensures that the pressure value of the circuit remains constant, thus maintaining the sealing performance of each sealing surface throughout the coal charging process. The laying of the steel ring 7 avoids the high-temperature zone, reducing the impact of high-temperature deformation. The steel ring 7 itself has a certain width, allowing for a horizontal error of ±40mm when fitted with the cutting edge 4.4. Furthermore, the laying of the steel ring 7 will not affect normal production, making it highly feasible.

[0049] The cleaning of the coal charging hole seat 5 and the furnace cover 6 is accomplished by the coal charging hole cleaning machine 3 and the furnace cover cleaning scraper 11. This cleaning ensures the smooth operation of the automatic grouting process, thereby guaranteeing the sealing effect of the coal charging hole seat 5 and the furnace cover 6. Furthermore, the two actions are performed simultaneously in a single positioning operation, shortening the overall coal charging process time. The automatic error handling and automatic reset mechanical structure of the coal charging hole cleaning machine 3 is similar to that of the cover-opening machine 8, as shown in the attached diagram. Figure 6As shown, the process will not be repeated here. The cleaning of furnace cover 6 is shown in the attached image. Figure 7 As shown, when the electromagnet 8.8 attracts the furnace cover 6 and moves to the notch of the scraper rod 11.1, the scraper rod 11.1 overcomes the resistance of the compression spring 11.2, resulting in a preload between the scraper rod 11.1 and the furnace cover 6. At this time, the rotation of the cover-opening motor 8.6 drives the electromagnet 8.8 to rotate, thereby driving the furnace cover 6 to rotate. The relative movement between the furnace cover 6 and the scraper rod 11.1 removes impurities from the furnace cover. This structure is simple, reliable, and has a low maintenance rate.

[0050] After the furnace cover is closed, there is a gap between the coal charging hole seat 5 and the furnace cover 6, which needs to be sealed by the mud mixed by the grouting system 10. Figure 9 As shown, when sealing is required, the grouting system 10 releases an appropriate amount of slurry into the gap between the coal charging hole seat 5 and the furnace cover 6. Simultaneously, the rotation of the cover-opening motor 8.6 drives the electromagnet 8.8 to rotate, thereby rotating the furnace cover 6, allowing the slurry to evenly fill the entire gap, achieving a sealing effect. Because the slurry path of the grouting system 10 is very short, and the water and powder are stored separately and mixed on demand, the problem of slurry blockage is avoided, ensuring the stable reliability of the grouting system 10.

[0051] The grouting system 10 can be divided into three parts, as shown in the attached diagram. Figure 10 As shown: The first part is the detailed diagram of mixer 10.1, as attached. Figure 11 As shown, the second part is a powder conveying system consisting of four components: a screw shaft 10.2, a screw shaft 2 10.3, a dry powder hopper 10.4, a stirring motor 10.5, and a conveying motor 10.6. The third part is a water conveying system consisting of three components: a water pump 10.7, a water tank 10.8, and a water pipe 10.9.

[0052] Mixer 10.1 is mainly used for mixing and temporarily storing mud, as shown in the attached document. Figure 11 As shown. Its main features are: 1. Quick disassembly and replacement can be achieved through the quick-locking ring 10.1.6. 2. Power is generated by the screw shaft 10.2 conveying powder while driving the transmission shaft 10.1.2. The forward and reverse mixer 10.1 of the screw shaft 10.2 can realize both stirring and discharging actions without the need for other power. 3. Water delivery and cleaning functions can be realized through the rotating nozzle 10.1.9. The rotating nozzle has a simple and compact structure and can rotate by water pressure, effectively cleaning the residual mud in the cup 10.1.5.

[0053] The powder conveying system is used to store powder materials. Its main features are: 1. Material conveying is achieved through the rotation of the spiral blades of spiral shaft 10.2 and spiral shaft 20.3. Therefore, a certain size and quantity of aggregate can be added to the powder, allowing the mixed slurry to seal the larger gap between the furnace cover 6 and the coal charging hole seat 5, improving adaptability. 2. The dry powder hopper 10.4 is divided into upper and lower layers. The powder in the upper layer is quantitatively conveyed to the lower layer by the conveying motor 10.6. The powder in the lower layer is quantitatively conveyed to the cup 10.1.5 of the mixer 10.1 by the stirring motor 10.5. After the powder is conveyed, the stirring motor 10.5 can continue to run idle to stir the slurry, ensuring uniform mixing and preventing sedimentation until the slurry pouring is completed.

[0054] The water delivery system is mainly used to transport the water needed for mud mixing and cleaning the mixer 10.1. Its main features include: 1. The water pump 10.7 is a miniature high-pressure self-priming pump installed inside the water tank. The water pipe 10.9 is relatively short, and the water volume can be controlled by adjusting the power supply time. The structure is simple and compact. 2. The water tank 10.8 is externally insulated to prevent the water temperature from rising or freezing, which could affect system operation.

[0055] II. The sequence of actions and functions of this invention are described below:

[0056] Operation sequence: Open the furnace cover → Charge coal → Clean the coal charging hole seat and furnace cover → Close the furnace cover and automatically pour grout → Reset

[0057] The starting position of the six actions of opening the furnace lid is shown in the attached figure. Figure 1 As shown: The guide rail frame 1 is fixedly installed on the coal charging car. The upper guide sleeve 9 is fixedly installed at the outlet of the screw feeder. The moving trolley 2, driven by a motor, can reciprocate in the horizontal direction of the guide rail frame 1 via gear and rack transmission. The coal charging hole cleaner 3, the lower guide sleeve 4, the cover lifting machine 8, and the grouting system 10 are all fixedly installed on the moving trolley 2 and reciprocate with it. The furnace cover cleaning scraper 11 is fixedly installed on the guide rail frame.

[0058] After opening the furnace lid, the six steps begin as shown in the attached image. Figure 2As shown: Hydraulic cylinder 9.2 drives telescopic sleeve 9.4 to move downwards. Telescopic sleeve 9.6 moves downwards under the precise cooperation of slider 9.5 and slide rail 9.4, ensuring a uniform gap between graphite packing ring 9.3 and fixed sleeve 9.1. When telescopic sleeve 9.6 contacts the cover-opening pressure barrel 8.1, the cover-opening pressure barrel 8.1 moves downwards while compressing the cover-opening power spring 8.2 until electromagnet 8.8 is in contact with furnace cover 6. Then electromagnet 8.8 is energized, and electromagnet 8.8 and furnace cover 6 are attracted together. If there is an alignment error between the furnace cover 6 and the electromagnet 8.8, the conical hole on the electromagnet 8.8 will automatically guide and align with the cone on the furnace cover 6. Simultaneously, it will compress the cover-opening buffer spring 8.4 between the cover-opening lifting cylinder 8.7 and the cover-opening pressure barrel 8.1. At this time, the cover-opening positioning lifting rod 8.5 extends upward, creating a gap with the cover-opening pressure barrel 8.1. The cover-opening rolling head 8.3 will slide in the direction of the electromagnet 8.8's offset, thus satisfying the alignment error. Simultaneously, driven by the cover-opening motor 8.6, the electromagnet 8.8 can rotate, simultaneously rotating the furnace cover 6, achieving the effect of pre-actuating the furnace cover 6, facilitating its opening. When the furnace cover 6 is rotated and agitated by the electromagnet 8.8, the oil cylinder 9.2 retracts, the cover-opening pressure barrel 8.1 moves upward and resets under the action of the cover-opening power spring 8.2, the distance between the cover-opening pressure barrel 8.1 and the cover-opening lifting cylinder 8.7 is restored, and the cover-opening positioning lifting rod 8.5 automatically resets under the action of the cover-opening buffer spring 8.4, and the action of opening the furnace cover 5 is completed.

[0059] After completing step 6 of opening the furnace lid, as shown in the attached document... Figure 3 As shown: The mobile trolley 2 is driven by a motor and the transmission of gears and racks makes it move along the horizontal direction of the guide rail frame (1) to the coal loading start position.

[0060] After the coal loading process begins, see attached image. Figure 4 As shown: Hydraulic cylinder 9.2 drives telescopic sleeve 9.4 to move downwards. Telescopic sleeve 9.6 moves downwards under the precise cooperation of slider 9.5 and slide rail 9.4, ensuring smooth movement and uniform gap between graphite packing ring 9.3 and fixed sleeve 9.1, thereby ensuring the sealing between fixed sleeve 9.1 and telescopic sleeve 9.6, forming the first seal. When the spherical body 9.7 at the lower part of telescopic sleeve 9.6 contacts the conical body 4.1 on the upper part of cylinder 4.3, a second seal is formed because both spherical body 9.7 and conical body 4.1 are precision machined and made of heat-resistant material. The cylinder 4.3 moves downward and compresses the coal loading power spring 4.2 until the cutting edge 4.4 contacts the steel ring 7 and maintains sufficient pressure. The hydraulic cylinder 9.1 stops pressing down. Since the external steel ring 7 is far away from the high-temperature zone of the furnace opening, its deformation is small. In addition, the sufficient pressure between it and the cutting edge 4.4 can form a third seal. After the coal loading is completed, the hydraulic cylinder 9.1 retracts, and the cylinder 4.3 moves upward and resets under the action of the coal loading power spring 4.2, and the coal loading is completed.

[0061] Once the coal loading process is complete, see attached... Figure 5 As shown: The mobile trolley 2 is driven by a motor and the transmission of gears and racks makes it move along the horizontal direction of the guide rail frame 1 to the starting position of the cleaning furnace hole seat 5 and the cleaning furnace cover 6.

[0062] After the cleaning of the coal loading hole seat 5th action begins, see attached... Figure 6 As shown: Hydraulic cylinder 9.2 drives telescopic sleeve 9.4 to move downwards. Telescopic sleeve 9.6 moves downwards under the precise cooperation of slider 9.5 and slide rail 9.4, ensuring uniform gap between graphite packing ring 9.3 and fixed sleeve 9.1. When telescopic sleeve 9.6 contacts the cleaning pressure barrel 3.1, the cleaning pressure barrel 3.1 moves downwards while compressing the cleaning power spring 3.2 until the scraper disc 3.8 is in contact with the coal charging hole seat 5. Then the cleaning motor 3.6 rotates, driving the scraper disc 3.8 to rotate and clean the coal charging hole seat 5. If there is an alignment error between the coal charging hole seat 5 and the scraper disc 3.8, the scraper disc 3.8 will automatically guide and align with the furnace hole seat 5. Simultaneously, it will press down the cleaning machine buffer spring 3.4 between the cleaning cover lifting cylinder 3.7 and the cleaning pressure barrel 3.1. At this time, the cleaning positioning rod 3.5 extends upward, creating a gap between it and the cleaning pressure barrel 3.1. The cleaning rolling head 3.3 will slide in the direction of the scraper disc 3.8's offset, thus addressing the alignment error. After the coal charging hole seat is cleaned, the hydraulic cylinder 9.2 retracts, and the cleaning pressure barrel 3.1 moves upward and resets under the action of the cleaning power spring 3.2. The distance between the cleaning pressure barrel 3.1 and the cleaning lifting cylinder 3.7 is restored, and the cleaning positioning rod 3.5 automatically resets under the action of the cleaning buffer spring 3.4, completing the coal charging hole seat cleaning process.

[0063] After starting the five steps of cleaning the furnace lid, see attached image. Figure 7 As shown: When the electromagnet 8.8 attracts the furnace cover 6 and moves it to the cleaning position, the furnace cover 6 will compress the scraper rod 11.1 backward. The scraper rod 11.2 is compensated for by the buffer spring 11.2, and a certain pressure is maintained between the scraper rod 11.1 and the furnace cover 6. Then, the lifting motor 8.6 drives the electromagnet 8.8 to rotate. The rotation of the electromagnet 8.8 drives the furnace cover 6 to rotate, causing relative movement between it and the scraper 11.1, thereby cleaning the debris on the furnace cover 6. Once clean, the lifting motor 8.6 stops rotating, and the cleaning action of the furnace cover 6 is completed.

[0064] After the cleaning of the coal charging hole seat 5 and the furnace cover 6 are completed, as shown in the attached document... Figure 8 As shown: The mobile trolley 2 is driven by a motor and the transmission of gears and racks makes it move along the horizontal direction of the guide rail frame 1 to the starting position of closing the furnace cover and automatically pouring grout.

[0065] After the furnace cover is closed and the automatic grouting process begins, see attached... Figure 9As shown: Hydraulic cylinder 9.2 drives telescopic sleeve 9.4 to move downwards. Telescopic sleeve 9.6 moves downwards under the precise cooperation of slider 9.5 and slide rail 9.4, ensuring uniform gap between graphite packing ring 9.3 and fixed sleeve 9.1. When telescopic sleeve 9.6 contacts cover-opening pressure barrel 8.1, cover-opening pressure barrel 8.1 moves downwards while compressing cover-opening power spring 8.2 until the furnace cover 6 carried by electromagnet 8.8 is in contact with the coal charging hole. Driven by cover-opening motor 8.6, electromagnet 8.8 can rotate, simultaneously driving furnace cover 6 to rotate. At this time, grouting system 10 starts to release grout. The grout, combined with the rotation of furnace cover 6, flows to fill the gap between furnace cover 6 and furnace hole seat 5. After grouting ends, cover-opening motor 8.6 stops rotating, electromagnet 8.8 is de-energized and releases furnace cover 6. Automatic grouting system 10 self-cleans, and grouting is completed. Then the hydraulic cylinder 9.2 retracts, the cover-opening pressure barrel 8.1 moves upward to reset under the action of the cover-opening power spring 8.2, the electromagnet 8.8 separates from the furnace cover 6, and the furnace cover closing action is completed.

[0066] The mud mixing process is as follows: Figure 10 As shown: The powder is placed in the dry powder hopper 10.4. The conveying motor 10.6 drives the screw shaft 10.3 to convey a metered amount of powder to the position of the screw shaft 10.2. The rotation of the stirring motor 10.5 can convey the powder to the mixer 10.1. The water pump 10.7 can convey a metered amount of water from the water tank 10.8 to the mixer 10.1 through the water pipe 10.9.

[0067] Mixer 10.1 as attached Figure 11 As shown: The mixer 10.1 is fixedly connected to the dry powder hopper 10.4 by a quick-locking ring. The screw shaft 10.2 conveys the powder into the mixer 10.1 and transmits power to the rotating shaft 10.1.2. The drive shaft 10.1.2 drives the stirring shaft 10.1.4 to rotate and stir by driving the bevel gear 10.1.1 and bevel gear 2 10.1.3. At this time, water is sprayed out evenly through the rotating nozzle 10.1.9 and mixes with the powder in the cup 10.1.5 to form a slurry. Simultaneously, the drive shaft 10.1.2 transmits power to the spur gear 10.1.7, which drives the rack shaft 10.1.8 upward until the spur gear 10.1.7 disengages from the rack shaft 10.1.8. The rack shaft 10.1.8 stops moving but maintains its upward tendency. At this time, the spring pressure plate 10.1.11 is compressed by a certain amount and always maintains an upward force to close the outlet of the mixer 10.1, prevent the slurry from flowing out, and allow mixing time.

[0068] The mud flow action is shown in the attached figure. Figure 12As shown: When slurry needs to be discharged, the mixing motor 10.5 rotates in reverse, driving the spur gear 10.1.7 to rotate in reverse, which in turn drives the rack shaft 10.1.8 downward until the spur gear 10.1.7 disengages from the rack shaft 10.1.8. The rack shaft 10.1.8 stops moving, and the compression return spring 10.1.11 maintains an upward force to ensure that the spur gear 10.1.7 and rack shaft 10.1.8 are in a balanced state of engagement and disengagement. At this time, the spring pressure plate 10.1.11 moves downward, and the outlet of the mixer 10.1 opens, allowing the slurry to flow out. Finally, a small amount of high-pressure water is sprayed out through the rotating nozzle 10.1.9 to rinse the inner wall of the mixer 10.1, thus completing the slurry discharge process.

[0069] Once all actions are complete, reset to the position shown in the attached diagram. Figure 13 The position shown is for preparing for the next action.

Claims

1. A kind of furnace top coal hole sealing intelligent device, main components include upper guide sleeve (9), lower guide sleeve (4), uncovering machine (8), coal hole cleaning machine (3), furnace cover cleaning scraper (11), grouting system (10), mobile trolley (2) and guide rail frame (1), it is characterized by: The upper guide sleeve (9) is fixedly installed at the outlet of the screw feeder. The coal charging hole cleaner (3), lower guide sleeve (4), cover opener (8), and grouting system (10) are fixedly installed on the moving trolley (2). Through the reciprocating motion of the moving trolley (2), these four functional components can be accurately positioned with the coal charging hole seat (5), reducing the driving power source. The downward movement of the three functional components, namely the coal charging hole cleaner (3), lower guide sleeve (4), and cover opener (8), is accomplished by the extension of the upper guide sleeve (9). The furnace cover cleaning scraper (11) is fixedly installed at the lower part of the guide rail frame (1). The scraper is cleaned by rotating the furnace cover (6) with a single scraper. The scraper is compensated by spring to deal with the alignment error. The upper guide sleeve (9) and lower guide sleeve (4) cooperate to form three sealing points. The first sealing point adopts an annular graphite packing ring (9.3). The graphite packing ring (9.3) is installed between the fixed sleeve (9.1) and the telescopic sleeve (9.6) of the upper guide sleeve (9). The fixed sleeve (9.1) and the telescopic sleeve (9.6) are connected by a hydraulic cylinder (9.2) and the telescopic sleeve (9.6) can extend and retract up and down through the cooperation of the slide rail (9.4) and the slider (9.5). The second sealing point uses a spherical body (3.1) and a conical body (4.1) for sealing. The cooperation between the spherical body (3.1) and the conical body (4.1) can cope with the vertical error. The third sealing point uses a cutting edge seal, that is, a steel ring (7) is added outside the coal charging hole seat (5) to form a third seal with the cutting edge at the bottom of the lower guide sleeve (4). The steel ring (7) itself is relatively wide and can cope with the horizontal error. The cutting edge and the steel ring (7) are tightly fitted together under continuous pressure.

2. The intelligent sealing device for the coal charging hole at the top of the furnace according to claim 1, characterized in that: The aforementioned cover-opening machine (8) and coal charging hole cleaning machine (3) automatically find the center with the furnace cover (6) and coal charging hole seat (5) and automatically reset through mechanical means.

3. The intelligent sealing device for the coal charging hole at the top of the furnace according to claim 1, characterized in that: The grouting system is used to mix a certain amount of mud to seal the gap between the furnace cover (6) and the coal charging hole seat (5). This part ensures the seal after the furnace cover (6) is closed. This part adopts a dry and wet separation form. Before use, water and dry powder are stored separately. When in use, powder and water are quantitatively delivered to the mixer and mixed. The mixed mud is released into the gap between the furnace cover (6) and the coal charging hole seat (5). After the grouting is completed, the mixer is cleaned with a little water to avoid the problem of mud clogging the pipe.

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