Sintering machine side sealing device and non-contact sealing method

Abstract

The sintering machine side sealing device comprises a trolley and an air bellow, air bellow water tanks with U-shaped sections are fixedly welded to the outer surfaces of air bellow side plates on the two sides of the air bellow, and the air bellow water tanks continuously extend in the longitudinal direction of the trolley; mounting grooves are originally formed in the two sides of the lower end of the trolley, and trolley sealing T-shaped plates are connected into the mounting grooves through bolts. The trolley sealing T-shaped plate is vertically inserted into a water tank of an air box and immersed in a sealing medium, so that a non-contact type liquid-solid composite sealing structure is formed between the air box and the trolley, through the non-contact design of the T-shaped sealing plate and a U-shaped groove, the abrasion problem of traditional friction type sealing is completely avoided, the service life of a sealing part is greatly prolonged, and the sealing effect is good. A lubricating grease supply system is omitted, faults caused by lubrication failure are reduced, and the maintenance cost is reduced by more than 40%.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical sintering equipment, and in particular to a sintering machine side sealing device and a non-contact sealing method. Background Art

[0002] In the sintering production process, the lateral seal between the sintering machine's bellows and the trolley is a key link in controlling air leakage, ensuring the power consumption of the main exhaust fan, and the quality of the sintered ore. Existing technologies generally use a mechanical contact structure of "elastic sealing plate plus fixed slide plate." The typical arrangement is: wear-resistant slide plates are fixed on both sides of the bellows, and an elastic sealing plate (mostly made of heat-resistant stainless steel, graphite composite materials, or rubber-metal composites) is installed on the bottom edge of the trolley, which is compressed by springs or leaf springs. The spring force keeps the sealing plate in constant contact with the slide plate surface, and grease is added to the contact surface to form an oil film to reduce dry friction. However, under the high temperature, high dust, and high negative pressure conditions of the sintering machine, the above-mentioned contact seal exposes the following difficult-to-overcome defects: The elastic sealing plate is easily subjected to thermal creep, warping, or fatigue cracking due to long-term exposure to high-temperature flue gas and sintered ore radiation heat shock; dust particles enter the friction pair and act as abrasives, further accelerating the wear of the sealing plate. Once the sealing plate edge is notched or deformed as a whole, the spring compensation cannot make up for the gap, and the air leakage rate increases rapidly. The measured single-point air leakage can reach 100m 3 / h or more. Lubrication failure and frequent maintenance; general lithium-based or complex calcium sulfonate greases above 150°C experience increased volatility of base oil, decreased viscosity, and a maximum lubrication cycle of less than one week; high-temperature dust mixed with hard sludge forms, which in turn exacerbates abrasive wear. On-site statistics show that a 300m 2 The sintering machine needs to replace 600 to 800 sealing plates and consume 3 to 4 tons of grease every year, with spare parts and labor costs exceeding 1.2 million yuan. The air leakage rate is high and the energy consumption is large; after the elastic sealing plate is worn, the air leakage area of ​​the entire seal increases exponentially, resulting in a system leakage rate of up to 25% to 40%. The main exhaust fan needs to do extra work to overcome the air leakage, and the power consumption per ton of sintered ore increases by 3 to 5 kWh. Structural limitations and safety hazards; in order to ensure the clamping force, the spring stiffness needs to be designed to be larger, resulting in increased resistance to the trolley operation and increased load on the drive motor; at the same time, metal or graphite dust produced by wear can easily form combustible deposits in the bellows, posing a risk of spontaneous combustion. Unable to adapt to the trend of large-scale and intelligentization; as the sintering machine moves towards 450m 2 For the above-mentioned super-large developments, the sealing plate length exceeds 300m. The traditional manual inspection and manual grease injection mode can no longer detect local failures in time, and it is even more difficult to achieve online monitoring of air leakage rate and predictive maintenance. Summary of the Invention

[0003] To this end, the present invention provides a sintering machine side sealing device and a non-contact sealing method to solve the above-mentioned problems in the prior art.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] According to a first aspect of the present invention, a trolley and a bellows are included, wherein the outer surfaces of the bellows side plates on both sides of the bellows are welded and fixed with bellows water troughs having a U-shaped cross-section, and the bellows water troughs extend continuously along the longitudinal direction of the trolley;

[0006] The two sides of the lower end of the trolley are originally provided with mounting grooves, and the trolley sealing T-shaped plates are connected to the mounting grooves by bolts;

[0007] The trolley sealing T-plate is vertically inserted into the bellows water tank and immersed in the sealing medium, thereby forming a non-contact liquid-solid composite sealing structure between the bellows and the trolley;

[0008] Both ends of the bellows water tank are equipped with high-temperature resistant fluororubber flexible sealing skins, which cover the notch and allow the trolley sealing T-plate to pass freely;

[0009] The bottom of the bellows water tank is connected to the leaked sand collection tank, and an emergency sand box and an emergency water tank are arranged outside the bellows water tank for online replenishment of the sealing medium.

[0010] Furthermore, the bellows water tank has a depth of 150-200 mm, a width of 100-120 mm, and a wall thickness of 3-5 mm. The bellows water tank is formed by integrally bending and continuously welding 06Cr19Ni10 stainless steel plates.

[0011] Furthermore, the trolley sealing T-plate is made of 16Mn low-alloy manganese steel plate with a thickness of 12-20mm. The depth of its vertical section inserted into the sealing medium is ≥100mm, and the horizontal section is fastened to the bottom surface of the installation groove by high-strength bolts.

[0012] Furthermore, the sealing medium is a mixture of water slag and yellow sand in a volume ratio of 7:3 to 5:5, with a particle size of ≤3mm, a moisture content of ≤5%, a filling height of 150-200mm, and a surface ≥5mm lower than the top surface of the bellows water tank.

[0013] Furthermore, the vertical gap between the lower surface of the trolley bottom plate and the top surface of the bellows water tank is 10-20 mm.

[0014] Furthermore, the leaked sand collection trough is a V-shaped stainless steel trough, which is arranged along both ends of the bellows water tank, and a collection device and a conveying device are provided at the bottom for returning the recovered and conveyed sealing medium to the emergency sand box.

[0015] Furthermore, the high-temperature resistant fluororubber flexible sealing skins at both ends of the bellows water tank adopt an "Ω"-shaped pre-compression structure and are fixed in sections to the ends of the bellows water tank through pressure plates and stainless steel strips.

[0016] Furthermore, the emergency sand box and emergency water tank arranged outside the bellows water tank are both independent stainless steel containers, with an electric plug-in valve at the bottom connecting to the bellows water tank, and a level meter and an automatic water replenishment valve are provided to realize online quantitative replenishment of the sealing medium.

[0017] Furthermore, a detachable stainless steel insulation cover is provided on the outside of the bellows water tank, and the insulation cover is filled with aluminum silicate fiber felt. The insulation cover is connected to the bellows side plate by a quick buckle, which is convenient for inspection and maintenance.

[0018] According to a second aspect of the present invention, a non-contact sealing method including the above-mentioned sintering machine side sealing device comprises the following steps:

[0019] Step 1: Remove the elastic sealing plate and slideway between the original trolley and the bellows;

[0020] Step 2: Cut and bend the full length of the side panels on both sides of the bellows to form a U-shaped bellows water tank, weld it firmly and then perform an airtightness test;

[0021] Step 3: Fill the bellows tank with sealing medium evenly to the designed height and pre-press it tightly;

[0022] Step 4: Fix the trolley sealing T-plate in the trolley installation groove with high-strength bolts at a spacing of ≤1m, ensuring the verticality is ≤1mm / m;

[0023] Step 5: Adjust the trolley's operating height so that the trolley's sealing T-plate is inserted into the sealing medium ≥100mm, and at the same time, maintain a gap of ≥10mm between the trolley's bottom plate and the top surface of the bellows tank;

[0024] Step 6: Install high-temperature resistant fluororubber flexible sealing leather at both ends of the bellows tank to form a dynamic dust curtain;

[0025] Step 7: Start the leaking sand collection tank and emergency feeding system. When the sealing medium height is lower than the set lower limit of 150mm, automatically or manually add water slag or yellow sand to the set upper limit of 200mm to ensure that the seal remains effective.

[0026] The present invention has the following advantages:

[0027] 1. The present invention completely transforms the mechanical sliding pair between the traditional elastic sealing plate and the fixed slide into a non-contact liquid-solid composite sealing system of "T-shaped sealing plate-flexible sealing medium-U-shaped water tank". After the T-shaped sealing plate is vertically inserted into the sealing medium, it forms a dynamic sealing barrier relying solely on the fluidity of the medium itself, always maintaining a non-contact state with the tank wall and bottom, fundamentally eliminating the root cause of friction and wear. The direct effect of this is that all sealing-related components no longer need to withstand frictional heat, abrasive cutting and repeated extrusion, the risks of material fatigue and plastic deformation are completely avoided, the life cycle of the seal is extended by orders of magnitude, and the grease supply system and its supporting pumps, valves, pipelines, joints, etc. are all eliminated. This not only simplifies the equipment structure, but also completely eliminates the chain failure caused by high-temperature carbonization of grease, dust pollution, pipeline blockage or grease injection failure. Maintenance operations have changed from "regular disassembly and inspection, replacement of worn parts, and relubrication" to "regular inspection and replenishment of medium". The demand for labor and spare parts is greatly reduced, and the demand for on-site maintenance space is significantly reduced, leaving greater flexibility for production organization.

[0028] 2. The sealing medium of the present invention adopts industrial by-products with fine particles and good fluidity such as water slag and yellow sand, and naturally forms a "particle-liquid film" composite sealing layer that can be reshaped in real time in the U-shaped water tank. The medium has both the blocking properties of solid particles and the adaptive filling properties of liquids. When the trolley produces a slight displacement due to thermal expansion and contraction, mechanical vibration or track error, the medium can flow instantaneously and refill the gap, automatically compensating for the deformation without manual adjustment. The negative pressure airflow forms a stable gas-solid boundary layer on the surface of the medium, blocking the airflow channel, and the negative pressure fluctuations are quickly absorbed. The sintering machine bellows system obtains a continuous and stable negative pressure environment. The flexible medium has good follow-up to multi-dimensional deviations such as the lateral swing and longitudinal warping of the trolley, and will not cause a sudden drop in sealing performance due to sudden changes in local gaps. It fundamentally solves the stubborn problem of traditional rigid seals that "slight displacement leads to large air leakage".

[0029] 3. The present invention completely transforms the traditional maintenance logic of "replacing worn parts" into a simple operation of "replenishing consumable media": the sealing medium is widely available, inexpensive, and can be repeatedly recycled, screened, and reused to form a closed-loop cycle. There is no new solid waste emission on site, which meets the requirements of clean production. The leakage sand collection trough is linked with the emergency sand box and emergency water tank to realize online recovery, online replenishment, and online allocation of the medium. "Production and maintenance" can be completed during equipment operation without additional downtime. Under high temperature conditions, the chemical stability of water slag and yellow sand is excellent. They will not soften, volatilize or burn due to temperature increase, nor will they react adversely with sintering flue gas. They always maintain stable physical sealing properties. Dust cannot penetrate the granular medium layer with a certain thickness. The medium itself is continuously reused by the collection system. The on-site environment is clean, avoiding the secondary wear and lubrication failure problems caused by dust intrusion in traditional seals. The overall operation management is more green, low-carbon, and efficient. The present invention completely eliminates mechanical friction and completely avoids the wear problem of traditional friction seals through the non-contact design of the T-shaped sealing plate and the U-shaped groove, greatly extending the service life of the sealing components, eliminating the grease supply system, reducing failures caused by lubrication failure, and reducing maintenance costs by more than 40%. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0031] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0032] Figure 1 A schematic diagram of the overall cross-sectional structure of a sintering machine side sealing device provided in some embodiments of the present invention;

[0033] Figure 2 A schematic diagram of the prior art structure of a sintering machine side sealing device provided in some embodiments of the present invention;

[0034] Figure 3 A schematic diagram of the overall three-dimensional bottom view of a sintering machine side sealing device provided by some embodiments of the present invention;

[0035] Figure 4 A schematic diagram of the overall three-dimensional top view of a sintering machine side sealing device provided in some embodiments of the present invention;

[0036] Figure 5 A schematic diagram of the overall top view of a sintering machine side sealing device provided in some embodiments of the present invention;

[0037] Figure 6 A schematic side view of the overall structure of a sintering machine side sealing device provided by some embodiments of the present invention;

[0038] Figure 7 This is a schematic diagram of the overall front view structure of a sintering machine side sealing device provided in some embodiments of the present invention.

[0039] In the figure: 1. Trolley; 2. Mounting groove; 3. Trolley sealing T-plate; 4. Bellows water tank; 5. Bellows; 6. Sealing medium. DETAILED DESCRIPTION

[0040] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0041] like Figures 1 to 7 As shown, a sintering machine side sealing device in an embodiment of the first aspect of the present invention includes a trolley 1 and a bellows 5. Bellows water troughs 4 with a U-shaped cross-section are welded and fixed to the outer surfaces of the bellows side plates on both sides of the bellows 5. The bellows water troughs 4 extend continuously in the longitudinal direction of the trolley 1.

[0042] Mounting grooves 2 are originally provided on both sides of the lower end of the trolley 1, and the trolley sealing T-plates 3 are connected to the mounting grooves 2 by bolts;

[0043] The trolley sealing T-plate 3 is vertically inserted into the bellows water tank 4 and immersed in the sealing medium 6, thereby forming a non-contact liquid-solid composite sealing structure between the bellows 5 and the trolley 1;

[0044] Both ends of the bellows tank 4 are equipped with high-temperature resistant fluororubber flexible sealing leathers, which cover the notch and allow the trolley sealing T-plate 3 to pass freely;

[0045] The bottom of the bellows water tank 4 is connected to the leaked sand collection tank, and an emergency sand box and an emergency water tank are arranged outside the bellows water tank 4 for online replenishment of the sealing medium 6.

[0046] As an example of the present invention, the bellows tank 4 has a depth of 150-200 mm, a width of 100-120 mm, and a wall thickness of 3-5 mm. The bellows tank 4 is formed by integrally bending and continuously welding 06Cr19Ni10 stainless steel plates.

[0047] As an example of the present invention, the trolley sealing T-plate 3 is made of 16Mn low-alloy manganese steel plate with a thickness of 12-20mm. The depth of its vertical section inserted into the sealing medium 6 is ≥100mm, and the horizontal section is fastened to the bottom surface of the installation groove 2 by high-strength bolts.

[0048] As an example of the present invention, the sealing medium 6 is a mixture of water slag and yellow sand in a volume ratio of 7:3 to 5:5, with a particle size ≤3mm, a moisture content ≤5%, a filling height of 150-200mm, and a surface ≥5mm lower than the top surface of the bellows water tank 4.

[0049] As an example of the present invention, the vertical gap between the lower surface of the bottom plate of the trolley 1 and the top surface of the bellows tank 4 is 10-20 mm.

[0050] As an example of the present invention, the leaked sand collection trough is a V-shaped stainless steel trough, which is arranged along both ends of the bellows water tank 4, and a collection device and a conveying device are provided at the bottom for returning the recovered sealing medium 6 to the emergency sand box.

[0051] As an example of the present invention, the high-temperature resistant fluororubber flexible sealing skin at both ends of the bellows tank 4 adopts an "Ω"-shaped pre-compression structure and is fixed in sections to the ends of the bellows tank 4 through pressure plates and stainless steel strips.

[0052] As an example of the present invention, the emergency sand box and emergency water tank configured outside the bellows water tank 4 are both independent stainless steel containers, with an electric plug-in valve at the bottom connecting to the bellows water tank 4, and a level meter and an automatic water replenishment valve are configured to realize online quantitative replenishment of the sealing medium 6.

[0053] As an example of the present invention, a detachable stainless steel insulation cover is provided on the outside of the bellows water tank 4, and the insulation cover is filled with aluminum silicate fiber felt. The insulation cover is connected to the bellows side panel by a quick buckle to facilitate inspection and maintenance.

[0054] A non-contact sealing method for a sintering machine side sealing device according to any one of claims 1 to 6, comprising the following steps:

[0055] Step 1: Remove the elastic sealing plate and slideway between the original trolley and the bellows;

[0056] Step 2: Cut and bend the full length of the side panels on both sides of the bellows 5 to form a U-shaped bellows water tank 4, weld them firmly and then perform an airtightness test;

[0057] Step 3: Fill the bellows tank 4 with the sealing medium 6 evenly to the designed height and pre-press it tightly;

[0058] Step 4: Fix the trolley sealing T-shaped plate 3 in the trolley 1 mounting groove 2 with high-strength bolts at a spacing of ≤1m, ensuring the verticality is ≤1mm / m;

[0059] Step 5: Adjust the operating height of the trolley 1 so that the trolley sealing T-plate 3 is inserted into the sealing medium 6 by ≥100mm, and at the same time, maintain a gap of ≥10mm between the bottom plate of the trolley 1 and the top surface of the bellows tank 4;

[0060] Step 6: Install high-temperature resistant fluororubber flexible sealing leather at both ends of the bellows tank 4 to form a dynamic dust curtain;

[0061] Step 7: Start the leaked sand collection tank and emergency feeding system. When the height of the sealing medium 6 is lower than the set lower limit of 150mm, automatically or manually add water slag or yellow sand to the set upper limit of 200mm to ensure that the seal is continuously effective.

[0062] Example 1: 300m 2 Sintering machine side seal modification project

[0063] Device Background

[0064] A steel plant 300m 2 The sintering machine originally used a contact seal with double-sided spring pressure plates and graphite sliders, resulting in an air leakage rate of up to 38%. During the 2024 overhaul, the machine was completely renovated according to the present invention.

[0065] Key points for structural implementation

[0066] Bellows water tank 4: Made of 4mm thick 06Cr19Ni10 stainless steel plate, cold-bent on-site into a 180mm deep × 110mm wide U-shaped tank. Four sand collection tanks are set at both ends of the two water tanks.

[0067] Trolley sealing T-plate 3: 16Mn steel plate, 16mm thick, vertical section insertion depth 120mm; horizontal section fixed to the original graphite slideway mounting groove of trolley 1 with M16 10.9 grade high-strength bolts at 800mm intervals, with the bolt heads sunk 2mm and spot welded to prevent loosening;

[0068] Sealing medium 6: On-site blast furnace slag and dry river sand mixed in a ratio of 7:3, particle size 0.5-2mm, moisture content 3%, filling height 180mm;

[0069] Dynamic compensation: Emergency sandbox 8, volume 1.5m 3 , the bottom electric gate valve 9 is connected to the bellows water tank 4; the material level meter 10 is set to a lower limit of 170mm and an upper limit of 190mm, realizing automatic material replenishment every 4 hours;

[0070] Flexible sealing skin 11: uses "Ω" shaped fluororubber strip, pre-compression amount 5mm, segmented pressure plate 12 is provided with an M8 stainless steel pressure strip every 300mm, allowing the trolley 1 to run with an amplitude of ±3mm;

[0071] Operation effect

[0072] After the transformation, the air leakage rate in the 72-hour hot test was reduced to 12%, saving 860,000 kWh of electricity annually; the sand collection tank 7 recovered 92% of the medium, and the on-site dust concentration was reduced from 180 mg / m 3 Reduced to 25 mg / m 3 .

[0073] Example 2: 450m 2 New sintering machine supporting sealing system

[0074] Device Background

[0075] In 2025, a coastal steel plant will build a new 450m 2 The sintering machine adopts the present invention at the design stage, and is required to meet the requirements of high salt fog environment and -20℃ winter operation;

[0076] Structural optimization plan

[0077] Bellows water tank 4: 200mm deep, 120mm wide, 5mm thick; the outer side of the tank is entirely wrapped with a removable insulation cover 13, filled with 50mm aluminum silicate fiber felt, with quick-release buckles 14 set every 1.5m, and a single section can be removed in 30 seconds during maintenance;

[0078] Corrosion-resistant design: The inside of the tank is sprayed with a 0.3mm thick ceramic coating, and the bolts and pressure plates are made of 2205 duplex stainless steel;

[0079] Antifreeze measures: A heating pipe (60°C hot water circulation) is added between the emergency water tank 15 and the bellows water tank 4. In winter, the automatic water supply valve 16 is activated when the medium temperature is ≤5°C to maintain the moisture content of the sealing medium 6 ≤4%;

[0080] Trolley sealing T-plate 3: The vertical section is inserted to a depth of 150 mm. A 5 mm thick ceramic fiber gasket is placed between the horizontal section and the mounting slot 2 to prevent the bolts from loosening due to heat.

[0081] Sealing medium 6: water slag and machine-made sand are mixed in a ratio of 5:5, with a particle size of ≤1mm and a filling height of 200mm. A micro vibrator 17 (amplitude 0.5mm, running for 30s every 10min) is added to the bottom of the tank to prevent the medium from hardening.

[0082] Flexible sealing skin 11: Fluororubber covered with polytetrafluoroethylene braided mesh, the salt spray resistance life is increased to 5 years; the pressure plate 12 is changed to an integral slide rail structure, and the single-section sealing skin can be replaced online without stopping the machine;

[0083] Operation effect

[0084] The air leakage rate was stable at <10% within 6 months of operation, and no freezing of the medium occurred in the -15°C environment in winter. The thermal insulation cover 13 kept the temperature difference between the outer wall of the tank and the ambient temperature less than 3°C, reducing heat loss by about 4%.

[0085] Example 3: 180m 2 Sintering machine side seal "dry + liquid-solid composite" dual-mode transformation

[0086] Project Background

[0087] A steel company 180m 2 The sintering machine is located in a water-scarce area, and the original water seal frequently freezes and cracks in winter. In 2024, this patented "dry-liquid-solid switchable" solution was adopted for renovation.

[0088] Structural characteristics

[0089] Bellows tank 4: The inner cavity size is changed to 120mm deep × 100mm wide, with a wall thickness of 3mm; a pneumatic gate valve 18 is installed at the bottom, which can drain the medium and switch to dry operation within 5 seconds;

[0090] The tank body is manufactured in two sections, connected in the middle by a stainless steel corrugated expansion joint 19, which absorbs heat and expands by ±20mm;

[0091] Trolley sealing T-plate 3: The lower edge is welded with a removable high-chromium cast iron wear-resistant blade 20 (8mm thick), and the service life is extended from 8 months to 24 months;

[0092] Graphite packing 21 is embedded between the horizontal section and the mounting groove 2 to form a secondary dustproof;

[0093] Sealing medium 6: Designed as a dual-component "water slag + ceramic microbeads"; in summer (May-October), the system is filled with water at a ratio of 6:4; in winter (November-April), the system is emptied and then filled with ceramic microbeads with a particle size of 1-2 mm to form a dry fluidized bed, which does not require heating;

[0094] Flexible sealing skin 11: changed to a double-layer structure: outer fluororubber curtain + inner stainless steel wire mesh, the ability to resist abrasive erosion is increased by 3 times;

[0095] Recovery system: A permanent magnetic iron remover 22 is installed below the sand collection tank 7, which automatically recovers ≈60kg of iron-containing particles every day and can be directly returned to the sintering ingredients;

[0096] Operation effect

[0097] In the first year after the renovation, the air leakage rate was 11.2% in summer and 13.5% in winter after switching to dry type, saving 1,200 tons of water throughout the year. Due to the elimination of heating, 180,000 kWh of electricity was saved annually. The replacement cycle of the wear-resistant blade 20 was reduced from 3 times / year to 1 time / year.

[0098] Example 4: 600m2 "Modular assembly + intelligent monitoring" sealing system for super-large sintering machines

[0099] Project Background

[0100] 2025 China's first 600m 2 The construction of extra-large sintering machines requires the sealing system to meet the requirements of "quick installation, online diagnosis, and life prediction";

[0101] Bellows tank 4: Made of 6mm thick 06Cr19Ni10 stainless steel rolled U-shaped modules, each section is 3m long, connected by flange bolts, and the whole circle assembly time is ≤8h;

[0102] The inner side is sprayed with 0.2mm polytetrafluoroethylene coating, the friction coefficient is reduced to 0.08, and the insertion resistance of the trolley sealing T-plate 3 is reduced by 35%;

[0103] Intelligent monitoring: 23 distributed optical fibers are arranged in the slot to measure the medium height (accuracy ±2mm) and temperature in real time. The data is uploaded to the cloud AI model via 5G to predict the remaining life and push maintenance work orders.

[0104] Sealing medium 6: uses a composite material of "blast furnace slag + graphite powder" with a volume ratio of 7:3. The graphite powder forms a lubricating film at a microscale to reduce insertion resistance;

[0105] The media replacement cycle has been changed from manual experience to dynamic adjustment by AI algorithm, which has been extended by an average of 15%;

[0106] Emergency supply: The emergency sand box 8 and the emergency water tank 15 use a "one-to-two" slide rail trolley 24, which can be pulled out for maintenance without stopping the machine, and the replacement time is less than 30 minutes;

[0107] Flexible sealing skin 11: Changed to an "S"-shaped memory alloy frame + fluororubber composite part, which can withstand the trolley's lateral misalignment of ±10mm without tearing;

[0108] Visual maintenance: LED light-transmitting windows 25 are set every 6 meters outside the bellows tank 4, so that the medium status can be observed during night inspections without a flashlight;

[0109] Operational results: 168-hour continuous heat load test: air leakage rate 9.6%; fiber optic monitoring system provides 7-day advance warning of local weld cracks, avoiding unplanned downtime; modular design reduces overhaul time from 72 hours to 36 hours

[0110] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

[0111] The terms "upper", "lower", "left", "right", "middle", etc. used in this specification are only for the convenience of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of the present invention without substantially changing the technical content.

Claims

1. A sintering machine side sealing device, characterized in that: It comprises a trolley (1) and a bellows (5), and is characterized in that: A U-shaped bellows water tank (4) is welded and fixed to the outer surface of the bellows side plates on both sides of the bellows (5), and the bellows water tank (4) extends continuously along the longitudinal direction of the trolley (1); Mounting grooves (2) are originally provided on both sides of the lower end of the trolley (1), and trolley sealing T-shaped plates (3) are connected to the mounting grooves (2) via bolts; The trolley sealing T-shaped plate (3) is vertically inserted into the interior of the bellows water tank (4) and immersed in the sealing medium (6), thereby forming a non-contact liquid-solid composite sealing structure between the bellows (5) and the trolley (1); Both ends of the bellows water tank (4) are equipped with high-temperature resistant fluororubber flexible sealing skins, which cover the notch and allow the trolley sealing T-plate (3) to pass freely; The bottom of the bellows water tank (4) is connected to a leaking sand collection tank, and an emergency sand box and an emergency water tank are arranged outside the bellows water tank (4) for online replenishment of the sealing medium (6).

2. A sintering machine side sealing device according to claim 1, characterized in that: The bellows water tank (4) has a depth of 150-200 mm, a width of 100-120 mm, and a wall thickness of 3-5 mm. The bellows water tank (4) is formed by integrally bending and continuously welding 06Cr19Ni10 stainless steel plates.

3. The sintering machine side sealing device according to claim 2, characterized in that: The trolley sealing T-shaped plate (3) is made of 16Mn low-alloy manganese steel plate with a thickness of 12-20 mm. The vertical section is inserted into the sealing medium (6) to a depth of ≥100 mm, and the horizontal section is fastened to the bottom surface of the installation groove (2) by high-strength bolts.

4. The sintering machine side sealing device according to claim 3, characterized in that: The sealing medium (6) is a mixture of water slag and yellow sand in a volume ratio of 7:3 to 5:5, with a particle size of ≤3mm, a moisture content of ≤5%, a filling height of 150-200mm, and a surface ≥5mm lower than the top surface of the bellows water tank (4).

5. The sintering machine side sealing device according to claim 4, characterized in that: The vertical gap between the lower surface of the bottom plate of the trolley (1) and the top surface of the bellows water tank (4) is 10-20 mm.

6. The sintering machine side sealing device according to claim 5, characterized in that: The leaked sand collection trough is a V-shaped stainless steel trough, which is arranged along both ends of the bellows water tank (4), and a collecting device and a conveying device are provided at the bottom for returning the recovered sealing medium (6) to the emergency sand box.

7. The sintering machine side sealing device according to claim 6, characterized in that: The high-temperature resistant fluororubber flexible sealing skins at both ends of the bellows water tank (4) adopt an "Ω"-shaped pre-compression structure and are fixed to the ends of the bellows water tank (4) in sections through pressure plates and stainless steel strips.

8. The sintering machine side sealing device according to claim 7, characterized in that: The emergency sand box and emergency water tank arranged outside the bellows water tank (4) are both independent stainless steel containers, with an electric gate valve at the bottom connected to the bellows water tank (4), and a material level meter and an automatic water supply valve are arranged to realize online quantitative supply of the sealing medium (6).

9. The sintering machine side sealing device according to claim 8, characterized in that: The outside of the bellows water tank (4) is provided with a detachable stainless steel heat-insulating cover, the heat-insulating cover is filled with aluminum silicate fiber felt, and the heat-insulating cover is connected to the bellows side plate through a quick buckle, which is convenient for inspection and maintenance.

10. A non-contact sealing method based on the sintering machine side sealing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Remove the elastic sealing plate and slideway between the original trolley and the bellows; Step 2: Cut and bend the side panels on both sides of the bellows (5) along their entire length to form a U-shaped bellows water tank (4), weld them firmly, and then perform an airtightness test; Step 3: Fill the bellows water tank (4) with the sealing medium (6) evenly to the designed height and pre-press it tightly; Step 4: Fix the trolley sealing T-plate (3) in the trolley (1) mounting groove (2) with high-strength bolts at a spacing of ≤1m, ensuring verticality ≤1mm / m; Step 5: Adjust the running height of the trolley (1) so that the trolley sealing T-plate (3) is inserted into the sealing medium (6) by ≥100mm, while maintaining a gap of ≥10mm between the bottom plate of the trolley (1) and the top surface of the bellows tank (4); Step 6: Install high-temperature resistant fluororubber flexible sealing skins at both ends of the bellows tank (4) to form a dynamic dust curtain; Step 7: Start the leaking sand collection tank and the emergency feeding system. When the height of the sealing medium (6) is lower than the set lower limit of 150mm, automatically or manually add water slag or yellow sand to the set upper limit of 200mm to ensure that the sealing is continuously effective.

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