A furnace door structure of a car bottom furnace

Abstract

This invention relates to the field of bogie hearth furnace technology, and in particular provides a furnace door structure for a bogie hearth furnace. The furnace door structure includes a fixed gantry frame mechanism, a furnace door mechanism, and a wire rope traction assembly. The furnace door mechanism includes a guide hinge limiting assembly and a furnace door body. Upper and lower sliding bodies are slidably assembled inside the gantry frame and are respectively equipped with a collecting component and a torsion spring scraper component, which can automatically scrape away accumulated slag in the slide rail during the furnace door's lifting and lowering process, and collect the waste slag. The fixed gantry frame mechanism is equipped with an adjustable triangular support truss assembly. The lower inclined support rod is telescopically adjustable and locked by a snap-lock mechanism, which can compensate for frame assembly errors and high-temperature thermal deformation. This device solves the problems of easy deformation of traditional furnace doors, slag accumulation and jamming in the slide rail, poor operational stability, and inconvenient maintenance. It features self-cleaning, adjustable support, vibration reduction and noise reduction, smooth operation, and simple maintenance, making it suitable for high-temperature continuous operation.

Description

Technical Field

[0001] This invention relates to the field of bogie hearth furnace technology, and in particular to a furnace door structure for a bogie hearth furnace. Background Technology

[0002] Bogie hearth furnaces are widely used in industries such as machinery manufacturing and metal heat treatment, primarily for heat treatment processes such as annealing, normalizing, and quenching of metal workpieces. The furnace door, as the sealing and opening / closing component of the furnace chamber, requires frequent and continuous vertical lifting and lowering operations. Existing bogie hearth furnace door gantry support structures are mostly fixed triangular supports, with no adjustable support points or angles. Under prolonged high-temperature operation, the frame is prone to thermal deformation and assembly misalignment, leading to slight bending of the vertical columns and deviations in the verticality of the slide rails. This results in problems such as door jamming, unilateral stress, and poor sealing. Furthermore, traditional furnace door slide rails lack automatic slag removal structures, allowing carbon deposits, tar, and oxide scale generated in the furnace chamber to easily accumulate, increasing sliding resistance and wear on moving parts. There is also no centralized waste collection and buffering noise reduction structure, resulting in high operating noise, frequent maintenance, and poor overall operational stability. Summary of the Invention

[0003] Therefore, it is necessary to provide a furnace door structure for a bogie furnace to solve at least one of the technical problems in the background art.

[0004] A furnace door structure for a bogie furnace includes a fixed gantry frame mechanism, a furnace door mechanism, and a wire rope traction assembly. The furnace door mechanism is slidably engaged inside the fixed gantry frame mechanism. The wire rope traction assembly is connected to the furnace door mechanism. The furnace door mechanism includes two guide hinge limiting assemblies and a furnace door body. The two guide hinge limiting assemblies are slidably engaged on both sides inside the fixed gantry frame mechanism. Each guide hinge limiting assembly includes an upper sliding body, a lower sliding body, two collecting parts, and a guide hinge limiting member. Both the upper and lower sliding bodies are slidably engaged on the inner side wall of the fixed gantry frame mechanism, with the upper sliding body located above the lower sliding body. The two collecting parts are respectively inserted into the bottom of the upper and lower sliding bodies. The upper end of the guide hinge limiting member is hinged to the upper sliding body, and the lower end of the guide hinge limiting member is hinged to the lower sliding body. Scrapers are connected to the upper ends of both side walls of the upper and lower sliding bodies via torsion springs.

[0005] As a further improvement of the present invention, the fixed gantry mechanism includes two triangular support truss assemblies and a top crossbeam suspension frame member. The top crossbeam suspension frame member is installed on the top of the two triangular support truss assemblies, and the two triangular support truss assemblies are arranged opposite to each other.

[0006] As a further improvement of the present invention, each triangular support truss assembly includes a bottom transverse base connecting rod, a vertical main column, an upper diagonal brace, and a lower diagonal brace. The bottom of the vertical main column is vertically connected to one end of the bottom transverse base connecting rod. A sliding groove is provided on the side of the vertical main column facing the furnace door. Both the upper and lower sliding bodies are slidably engaged in the sliding groove. The upper and lower diagonal braces are inclined relative to the bottom transverse base connecting rod. The top of the upper diagonal brace is connected to the top of the vertical main column, and the bottom of the upper diagonal brace is connected to the other end of the bottom transverse base connecting rod. A sliding groove is provided on the side of the lower diagonal brace away from the furnace door. Movable grooves are provided on both sides of the sliding groove. The top of the lower diagonal brace is slidably inserted into the sliding groove, and the bottom of the lower diagonal brace is hingedly connected to the other end of the bottom transverse base connecting rod.

[0007] As a further improvement of the present invention, the lower inclined brace includes a telescopic lower inclined brace, a snap-fit ​​hinge joint, and two telescopic snaps. The lower end of the telescopic lower inclined brace is hinged to the bottom and the other end of the bottom transverse base connecting rod. The snap-fit ​​hinge joint is rotatably sleeved on the top of the telescopic lower inclined brace. Both ends of the snap-fit ​​hinge joint are respectively opened in the moving groove. Each moving groove has multiple locking grooves on its side wall. The two telescopic snaps are respectively installed on the two side walls of the snap-fit ​​hinge joint, and each telescopic snap is inserted into the corresponding locking groove.

[0008] As a further improvement of the present invention, two sliding wheels are installed on both side walls of the upper and lower sliding bodies, each sliding wheel is locked in a sliding groove, a collection groove is opened at the bottom of each upper and lower sliding body, two feeding grooves are opened on the top side wall of the collection groove, a scraper storage groove is opened at the upper end of both side walls of each upper and lower sliding body, a baffle receiving groove is opened at both end side walls of the scraper storage groove, a locking groove is opened in the middle of both end side walls of the scraper storage groove, the locking groove is connected to the baffle receiving groove, and an inclined groove is opened on the bottom side wall of each scraper storage groove, the inclined groove is connected to the corresponding feeding groove.

[0009] As a further improvement of the present invention, the bottom of the scraper component is connected to the bottom side wall of the scraper storage groove via a torsion spring. The scraper component includes a scraper body, an elastic buffer noise reduction pad, two side baffles, two locking pins, and two levers. The bottom of the scraper body is connected to the bottom side wall of the scraper storage groove via a torsion spring, and the top of the scraper body is inclined towards the side wall of the scraper storage groove. The elastic buffer noise reduction pad is installed on the side wall of the scraper body adjacent to the scraper storage groove. The two side baffles are respectively installed at both ends of the side wall of the scraper body adjacent to the scraper storage groove. The two locking pins are respectively installed in the middle of the two side baffles. The two levers are respectively installed in the middle of both ends of the side wall of the scraper body away from the scraper storage groove.

[0010] As a further improvement of the present invention, each collection element includes a collection body and a pull-out ring, wherein the collection body is inserted into the collection groove and the pull-out ring is installed at the bottom of the collection body.

[0011] As a further improvement of the present invention, both the upper and lower ends of the guide hinge limiting member are connected to hinge members. Each hinge member includes a swing arm, a furnace door hinge pin, and a slider hinge pin. One end of the swing arm is hinged to the upper or lower end of the guide hinge limiting member. One end of the furnace door hinge pin is locked in the middle of the swing arm, and the other end of the furnace door hinge pin is locked in the upper side wall of the furnace door body. One end of the slider hinge pin is locked in the other end of the swing arm, and the other end of the slider hinge pin is locked in the middle of the upper or lower sliding body.

[0012] As a further improvement of the present invention, the top crossbeam suspension frame includes a top load-bearing main beam and two fixed pulley supports. The two ends of the top load-bearing main beam are respectively installed on the top of two vertical main columns. The two fixed pulley supports are installed on the top of the top load-bearing main beam, and a fixed pulley is rotatably engaged in each fixed pulley support. One end of the top load-bearing main beam is connected to a main pulley support frame. A main pulley support is installed on the top of the main pulley support frame, and a main pulley is rotatably engaged in the main pulley support.

[0013] As a further improvement of the present invention, the wire rope traction assembly includes two wire ropes and a traction head. One end of each of the two wire ropes is connected to the top of one end of the guide hinge limiting member of each of the two swing arms. The middle portions of the two wire ropes are respectively wound around the corresponding fixed pulley and main pulley. The top of the traction head is connected to the other end of the two wire ropes.

[0014] The beneficial effects of this invention are as follows: 1. This invention uses scrapers driven by elastic torsion springs on both sides of the sliding body to scrape away carbon deposits, dust and tar inside the sliding groove in real time, keeping the slide clean and reducing frictional resistance; relying on the torsion springs to achieve elastic compensation, adapting to the thermal deformation of the slide and the assembly gap deviation, avoiding hard impurities causing the sliding wheel to jam and the slider to wear unevenly, continuously keeping the slide clean, and ensuring the smooth operation of the furnace door for a long time.

[0015] 2. Waste scraped off by the scraper is guided through the feeding chute and inclined chute into the collection unit for centralized storage, preventing waste accumulation, raising the slider, and avoiding furnace door tilting. The collection unit can be plugged in and pulled out for cleaning without disassembling the mechanism, making maintenance simple and suitable for high-temperature continuous production conditions.

[0016] 3. The scraper body is mounted on the side walls of the upper and lower sliding bodies. The slider provides the mounting position and motion carrier for the scraper body, driving the scraper to reciprocate along the sliding groove to complete the scraping operation. The scraper body cleans impurities from the sliding track, protects the slider, and reduces the risk of the slider getting stuck due to impurities. The elastic buffer noise reduction pad on the back of the scraper absorbs the impact generated by lifting and scraping, suppresses metal resonance, reduces operating noise, reduces fatigue damage to parts, and extends the service life of the entire machine.

[0017] 4. Utilizing a double-wire rope multi-point traction structure, the furnace door experiences uniform force, smooth lifting, and guaranteed lifting accuracy. It also features compensating performance and is suitable for complex high-temperature furnace conditions. Two sets of guide hinge limit components on the left and right sides, combined with the sliding groove of the vertical main column, enable precise vertical lifting of the furnace door and vertical translation of the door, resulting in high operational stability. The retractable intermediate telescopic connecting rod, along with the lateral adaptive deflection of the swing arm, effectively compensates for assembly errors and high-temperature thermal deformation, preventing lifting jamming.

[0018] 5. The triangular support truss components can be flexibly adjusted in support position according to on-site installation conditions and equipment deformation. By changing the support point of the lower diagonal strut, it precisely adapts to frame assembly errors and high-temperature thermal deformation. It can specifically compensate for the stress deviation of the vertical main column, balance the overall load-bearing stress of the frame, effectively correct slight frame offset and deformation problems, and continuously ensure the vertical guiding accuracy of the sliding groove. At the same time, it can match the support stress point according to the stress point changes of furnace door lifting vibration and furnace gas pressure impact, significantly improving the overall structural stability and deformation resistance of the fixed gantry assembly, avoiding frame deformation and guide offset caused by long-term uneven stress, further ensuring the long-term stable operation of the furnace door, and reducing equipment failure and maintenance costs. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention.

[0020] Figure 2 This is a three-dimensional schematic diagram of a triangular support truss assembly and part of the furnace door mechanism according to an embodiment of the present invention.

[0021] Figure 3 This is a three-dimensional schematic diagram of a guide hinge limiting member and a hinge member according to an embodiment of the present invention.

[0022] Figure 4 This is a three-dimensional schematic diagram of the sliding body according to an embodiment of the present invention.

[0023] Figure 5 This is a cross-sectional view of the sliding body in an embodiment of the present invention.

[0024] Figure 6 This is a perspective view of a portion of the scraper component according to an embodiment of the present invention.

[0025] In the picture: 10. Fixed gantry frame mechanism; 11. Triangular support truss assembly; 12. Top crossbeam suspension frame; 110. Bottom transverse base connecting rod; 111. Vertical main column; 112. Upper diagonal brace; 113. Lower diagonal brace; 114. Sliding groove; 115. Sliding groove; 116. Moving groove; 117. Locking groove; 1130. Telescopic lower diagonal brace; 1131. Snap-fit ​​hinge joint; 1132. Telescopic snap-fit; 120. Top load-bearing main beam; 121. Fixed pulley support; 122. Fixed pulley; 123. Main pulley load-bearing frame; 124. Main pulley support; 125. Main pulley; 20. Furnace door mechanism; 21. Guide hinge limiting assembly; 22. Furnace door. 23. Upper sliding body; 24. Collector; 25. Guide hinge limiting component; 26. Scraper component; 27. Lower sliding body; 230. Sliding wheel; 231. Collecting trough; 232. Feeding trough; 233. Scraper storage trough; 234. Baffle receiving trough; 235. Slot; 236. Inclined trough; 260. Scraper body; 261. Elastic buffer noise reduction pad; 262. Side baffle; 263. Locking post; 264. Block; 240. Collector; 241. Pull-out ring; 251. Hinge component; 254. Swing arm; 255. Furnace door hinge pin; 256. Slider hinge pin; 30. Wire rope traction assembly; 31. Wire rope; 32. Traction head. Detailed Implementation

[0026] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0027] In the description of this invention, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figures 1 to 6 A furnace door structure for a bogie hearth furnace is disclosed, comprising a fixed gantry frame mechanism 10, a furnace door mechanism 20, and a wire rope traction assembly 30. The structure is symmetrically arranged and evenly stressed, and also features adjustable frame support, automatic slag removal, waste slag collection, vibration reduction, and noise reduction functions, making it suitable for the harsh operating conditions of bogie hearth furnaces, including long-term high temperature, high dust, and frequent opening and closing. The fixed gantry frame mechanism 10 serves as the load-bearing, guiding, and supporting benchmark for the entire machine, and is formed by combining two symmetrically arranged triangular support truss assemblies 11 and a top crossbeam suspension frame 12. The triangular support truss assembly 11 is the core load-bearing support structure, including a bottom transverse base connecting rod 110, a vertical main column 111, an upper diagonal brace 112, and an adjustable lower diagonal brace 113. The bottom horizontal base connecting rod 110 serves as the bottom fixed reference, ensuring the overall frame is stable on the ground. The vertical main column 111 is vertically assembled, and the sliding groove 114 opened on the inner side provides a vertical sliding track for the upper sliding body 23 and the lower sliding body 27, which is the core guide structure for the lifting of the furnace door. The upper diagonal brace 112 is fixedly connected to the top of the vertical main column 111 and the bottom horizontal base connecting rod 110, forming an upper fixed triangular support to ensure the rigidity of the upper structure of the frame.

[0030] The lower inclined brace 113 is an adjustable and adaptive support structure. A sliding groove 115 is formed on the side wall of the vertical main column 111, and a moving groove 116 is formed on both sides of the sliding groove 115. Multiple locking grooves 117 are arrayed on the inner wall of the moving groove 116. The lower inclined brace 113 consists of a telescopic lower inclined brace 1130, a snap-fit ​​hinge joint 1131, and a telescopic snap-fit ​​1132. The lower end of the telescopic lower inclined brace 1130 is hinged to the bottom transverse base connecting rod 110, providing adaptive sway capability. The snap-fit ​​hinge joint 1131 at the top is slidably inserted into the sliding groove 115, allowing for up-and-down adjustment of the support point along the sliding groove 115. Telescopic snap-fits 1132 are mounted on both sides of the snap-fit ​​hinge joint 1131. The telescopic snap-fits 1132 can elastically extend and retract into locking grooves 117 at different heights, achieving sliding positioning and locking. This structure allows for flexible adjustment of the support height, angle, and stress point of the lower diagonal brace 113 based on frame deformation, assembly deviations, and stress conditions. This precisely compensates for frame thermal deformation, corrects column misalignment, and significantly improves the frame's resistance to deformation and structural stability. A locking device is installed inside the telescopic lower diagonal brace 1130. The distance between the locking devices is equal to the distance between two adjacent locking slots 117, ensuring that even if the telescopic buckle 1132 is damaged, the locking device can still secure the telescopic lower diagonal brace 1130, thus maintaining its original inclination for fixing the vertical main column 111.

[0031] The top crossbeam suspension frame 12 is mounted on the top of two vertical main columns 111, serving to connect the two side frames, enclose the upper frame, and improve overall rigidity. The top load-bearing main beam 120 is the top load-bearing base, with two sets of fixed pulley supports 121 and fixed pulleys 122 installed on the top. At the same time, the main pulley support frame 123, main pulley support 124 and main pulley 125 are also assembled, which together form the reversing and guiding assembly of the wire rope 31, effectively regulating the wire rope traction path, preventing traction deviation and offset, and ensuring synchronous and uniform traction force on both sides.

[0032] The furnace door mechanism 20 is the main actuator for opening and closing the furnace door. It consists of two sets of guide hinge limiting components 21 on the left and right sides and the furnace door body 22. The symmetrical guide structure on both sides can effectively limit the swaying and deviation of the furnace door, ensuring pure vertical lifting and lowering motion. The guide hinge limiting component 21 consists of an upper sliding body 23, a lower sliding body 27, a collecting component 24, and a guide hinge limiting component 25. The upper and lower double sliding body structure forms a double-point guide support, improving the straightness and stability of lifting and lowering. Sliding wheels 230 are installed on both sides of the upper sliding body 23 and the lower sliding body 27. The sliding wheels 230 are rolled and engaged inside the sliding groove 114, changing sliding friction to rolling friction, effectively reducing lifting and lowering resistance and reducing component wear.

[0033] The upper sliding body 23 and the lower sliding body 27 have scraper storage grooves 233 on their upper ends for assembling and storing scraper parts 26. The baffle receiving grooves 234 and the locking grooves 235 at both ends of the scraper storage grooves 233 can limit the assembly of the side baffles 262 and locking pins 263 of the scraper parts 26, ensuring that the scraper parts 26 are firmly installed, do not shift, and do not loosen. When not in use, the scraper parts 26 can be stored in the scraper storage grooves 233, and the locking pins 263 are locked in the locking grooves 235 to prevent the scraper parts 26 from falling out. At the same time, the torsion spring cannot remove the scraper parts 26 from the scraper storage grooves 233. The bottom of the scraper parts 26 is hinged by a torsion spring. The torsion spring continuously outputs elastic preload, so that the blade edge of the inclined scraper body 260 always elastically fits the inner wall of the sliding groove 114. During the furnace door lifting and lowering process, the sliding body drives the scraper body 260 to reciprocate along the groove wall, automatically removing carbon deposits, dust, oxide scale, and other impurities, achieving self-cleaning operation without stopping the machine. The elastic buffer noise reduction pad 261 attached to the back of the scraper body 260 can absorb the impact of lifting and stopping and the vibration of scraping, weaken metal resonance, reduce operating noise, and reduce fatigue wear of parts. The levers 264 at both ends of the scraper body 260 can enable the scraper body 260 to be quickly disengaged.

[0034] The upper sliding body 23 and the lower sliding body 27 integrate a waste collection structure at their bottoms, including a collection trough 231, a feeding trough 232, and an inclined trough 236, which are interconnected to form a flow channel. A slag-passing groove is provided at the bottom of the scraper body 260. The waste scraped off by the scraper can flow through the slag-passing groove and the inclined trough 236 into the feeding trough 232, and then fall smoothly into the collection trough 231 under the guidance of the feeding trough 232, finally being collected in the insert-type collection body 240. A pull-out ring 241 is provided at the bottom of the collection body 240, allowing for direct insertion and removal for cleaning without disassembling the sliding body and furnace door structure. This simplifies maintenance, adapts to continuous production conditions, and effectively avoids furnace door misalignment, abrasive wear, and jamming caused by waste accumulation.

[0035] The guide hinge limiting component 25 serves as the adaptive hinge transmission base for the furnace door lifting. Hinges 251 are fitted at both the upper and lower ends of the guide hinge limiting component 25. Each hinge 251 consists of a swing arm 254, a furnace door hinge pin 255, and a slider hinge pin 256, forming a triangular hinge transmission structure. One inner end of the swing arm 254 is hinged to the end of the guide hinge limiting component 25, enabling adaptive swing fine-tuning. The middle of the swing arm 254 is hinged to the side wall of the furnace door body 22 via the furnace door hinge pin 255, and the outer end of the swing arm 254 is hinged to the corresponding upper sliding body 23 or lower sliding body 27 via the slider hinge pin 256. This structure enables the sliding body, guide hinge limiter 25 and furnace door body 22 to form a linked whole, which can effectively adapt to the equipment assembly gap and the high temperature micro deformation of the frame. The slight swing of the swing arm 254 compensates for the installation deviation, avoids the structure from being rigidly locked and the transmission from jamming, and ensures that the furnace door lifting transmission is smooth and the force is even.

[0036] The wire rope traction assembly 30 serves as the power traction structure for the equipment, consisting of wire ropes 31 and traction heads 32. Two wire ropes 31 are respectively connected to the top ends of the swing arms 254 near the guide hinge limiters 25 on both sides, and sequentially rotate around the set pulley 122 and the main pulley 125 to complete the reversing guidance. The ends are uniformly connected to the traction heads 32. The externally driven traction heads 32 can then drive the wire ropes 31 to move, thereby driving the swing arms 254, sliding bodies, and furnace door 22 to vertically rise and fall as a whole. The dual-sided synchronous traction structure effectively prevents the furnace door from tilting due to force on one side, ensuring smooth and reliable opening and closing.

[0037] In another embodiment, the upper suspension point of the wire rope 31 can be changed from the swing arm 254 to be directly fixedly connected to the suspension point on the side wall of the furnace door 22. The traction load of the wire rope 31 is directly applied to the furnace door 22. The swing arm 254 only retains the lateral adaptive compensation function and does not bear the lifting traction load, which further reduces the wear of the hinge pair and improves the service life and operational stability of the mechanism.

[0038] In another embodiment, the wire rope traction assembly 30 can be electrically driven for lifting.

[0039] Installation process: The furnace door mechanism 20 is slidably engaged inside the fixed gantry frame mechanism 10. Two guide hinge limiting components 21 are slidably engaged on both sides inside the fixed gantry frame mechanism 10. The upper sliding body 23 and the lower sliding body 27 are both slidably engaged on the inner side wall of the fixed gantry frame mechanism 10. Two collecting parts 24 are respectively inserted into the bottom of the upper sliding body 23 and the lower sliding body 27. The top crossbeam suspension frame component 12 is installed on the top of the two triangular support truss components 11. The upper sliding body 23 and the lower sliding body 27 are both slidably engaged in the sliding groove 114. The top of the lower diagonal brace component 113 is slidably inserted into the sliding groove 115. The snap-fit ​​hinge joint 1131 is rotatably sleeved on the top of the telescopic lower diagonal brace 1130. Two telescopic snaps 1132 are respectively installed on the two side walls of the snap-fit ​​hinge joint 1131, and each telescopic snap 1132 passes through the corresponding locking groove 117. Each sliding wheel 230 is engaged in the sliding groove 114. The elastic buffer noise reduction pad 261 is installed on the side wall of the scraper body 260 adjacent to the scraper storage groove 233. Two side baffles 262 are respectively installed at both ends of the side wall of the scraper body 260 adjacent to the scraper storage groove 233. Two locking pins 263 are respectively installed in the middle of the two side baffles 262. Two levers 264 are respectively installed in the middle of both ends of the side wall of the scraper body 260 away from the scraper storage groove 233. One end of the furnace door hinge pin 255 is engaged in the middle of the swing arm 254, and the other end of the furnace door hinge pin 255 is engaged in the upper side wall of the furnace door body 22. One end of the slider hinge pin 256 is engaged in the other end of the swing arm 254, and the other end of the slider hinge pin 256 is engaged in the middle of the upper sliding body 23 or the lower sliding body 27. The two ends of the top load-bearing main beam 120 are respectively installed on the top of the two vertical main columns 111, and the two fixed pulley supports 121 are both installed on the top of the top load-bearing main beam 120.

[0040] This invention can achieve: 1. During initial installation or when the frame experiences slight deformation or misalignment, the operator can pre-adjust the lower diagonal brace 113 of the triangular support truss assembly 11. Pressing the telescopic buckle 1132 disengages it from the current locking slot 117, causing the buckle hinge 1131 to slide up and down along the sliding groove 115 and the moving groove 116. Simultaneously, coordinating with the support angle and telescopic amount of the telescopic lower diagonal brace 1130, after the sliding groove 114 is guided, releasing the telescopic buckle 1132 allows it to engage with the corresponding locking slot 117, completing the support point locking and achieving stress balance and deformation correction of the frame. During normal operation, the external drive mechanism pulls the traction head 32, transmitting force through the wire rope 31 around the fixed pulley 122 and the main pulley 125, causing the two side swing arms 254 to swing, driving the upper sliding body 23 and the lower sliding body 27 to vertically rise and fall as a whole along the sliding groove 114 via the sliding wheel 230, thus opening and closing the furnace door 22. Throughout the lifting process, the upper sliding body 23 and the lower sliding body 27 drive the scraper 26 to move synchronously. Under the action of the torsion spring, the scraper body 260 remains in close contact with the inner wall of the sliding groove 114, continuously scraping away the carbon deposits, oxide scale, and dust impurities attached to the groove wall, preventing the accumulation of impurities from causing the sliding wheel 230 to jam. The scraped-off waste automatically falls into the inclined groove 236, is guided by the feeding groove 232, and flows into the collection groove 231, and is finally collected in the collection body 240 for centralized storage, effectively preventing the waste from scattering and accumulating and affecting the sliding accuracy. At the same time, the elastic buffer noise reduction pad 261 on the back of the scraper body 260 continuously absorbs the impact of the furnace door opening and stopping and the scraping vibration, weakens metal resonance, reduces equipment operating noise, and reduces fatigue wear of parts. When a large amount of waste accumulates inside the collection body 240, the operator can directly pull out the collection body 240 through the pull-out ring 241 to empty the waste. After cleaning, it can be inserted back into its original position without disassembling the furnace door and sliding mechanism, making maintenance convenient. When slight deformation of the frame occurs during long-term operation of the equipment, the support point can be finely adjusted again through the lower inclined brace 113 to continuously ensure the accuracy and stability of the whole machine operation.

[0041] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A furnace door structure for a bogie hearth furnace, characterized in that: The furnace includes a fixed gantry mechanism (10), a furnace door mechanism (20), and a wire rope traction assembly (30). The furnace door mechanism (20) is slidably engaged inside the fixed gantry mechanism (10). The wire rope traction assembly (30) is connected to the furnace door mechanism (20). The furnace door mechanism (20) includes two guide hinge limiting assemblies (21) and a furnace door body (22). The two guide hinge limiting assemblies (21) are slidably engaged on both sides inside the fixed gantry mechanism (10). Each guide hinge limiting assembly (21) includes an upper sliding body (23), a lower sliding body (27), two collecting parts (24), and a guide. The upper sliding body (23) and the lower sliding body (27) are slidably locked on the inner side wall of the fixed gantry mechanism (10) by the hinge limit member (25), and the upper sliding body (23) is located above the lower sliding body (27). Two collecting members (24) are respectively inserted into the bottom of the upper sliding body (23) and the lower sliding body (27). The upper end of the guide hinge limit member (25) is hinged to the upper sliding body (23), and the lower end of the guide hinge limit member (25) is hinged to the lower sliding body (27). The upper ends of the two side walls of the upper sliding body (23) and the lower sliding body (27) are connected to scraper members (26) by torsion springs.

2. The furnace door structure of the bogie hearth furnace according to claim 1, characterized in that: The fixed gantry mechanism (10) includes two triangular support truss assemblies (11) and a top beam suspension frame (12). The top beam suspension frame (12) is installed on the top of the two triangular support truss assemblies (11), and the two triangular support truss assemblies (11) are arranged opposite each other.

3. The furnace door structure of the bogie hearth furnace according to claim 2, characterized in that: Each triangular support truss assembly (11) includes a bottom transverse base connecting rod (110), a vertical main column (111), an upper diagonal brace (112), and a lower diagonal brace (113). The bottom of the vertical main column (111) is vertically connected to one end of the bottom transverse base connecting rod (110). A sliding groove (114) is provided on the side of the vertical main column (111) facing the furnace door (22). The upper sliding body (23) and the lower sliding body (27) are slidably engaged in the sliding groove (114). The upper diagonal brace (112) and the lower diagonal brace (113) are positioned relative to the bottom transverse base connecting rod (110). All 110) are inclined, and the top of the upper inclined support rod (112) is connected to the top of the vertical main column (111), and the bottom of the upper inclined support rod (112) is connected to the other end of the bottom horizontal base connecting rod (110). The lower inclined support rod (113) has a sliding groove (115) on the side away from the furnace door body (22). The two side walls of the sliding groove (115) have moving grooves (116). The top of the lower inclined support rod (113) is slidably inserted into the sliding groove (115), and the bottom of the lower inclined support rod (113) is hinged to the other end of the bottom horizontal base connecting rod (110).

4. The furnace door structure of the bogie hearth furnace according to claim 3, characterized in that: The lower diagonal brace (113) includes a telescopic lower diagonal brace (1130), a snap-fit ​​hinge joint (1131), and two telescopic snaps (1132). The lower end of the telescopic lower diagonal brace (1130) is hinged to the bottom and the other end of the bottom transverse base connecting rod (110). The snap-fit ​​hinge joint (1131) is rotatably sleeved on the top of the telescopic lower diagonal brace (1130). The two ends of the snap-fit ​​hinge joint (1131) are respectively opened in the moving groove (116). Each moving groove (116) has multiple locking grooves (117) on its side wall. The two telescopic snaps (1132) are respectively installed on the two side walls of the snap-fit ​​hinge joint (1131), and each telescopic snap (1132) passes through the corresponding locking groove (117).

5. The furnace door structure of the bogie hearth furnace according to claim 4, characterized in that: Two sliding wheels (230) are installed on both sides of the upper sliding body (23) and the lower sliding body (27). Each sliding wheel (230) is locked in the sliding groove (114). A collection groove (231) is opened at the bottom of each upper sliding body (23) and the lower sliding body (27). Two feeding grooves (232) are opened on the top side wall of the collection groove (231). The upper ends of the two sides of each upper sliding body (23) and the lower sliding body (27) are... Each scraper storage groove (233) is provided with a scraper receiving groove (234) on both ends of the scraper receiving groove (233). A slot (235) is provided in the middle of both ends of the scraper receiving groove (233). The slot (235) is connected to the slot (234). A sloping groove (236) is provided on the bottom side wall of each scraper receiving groove (233). The sloping groove (236) is connected to the corresponding feeding groove (232).

6. The furnace door structure of the bogie hearth furnace according to claim 5, characterized in that: The bottom of the scraper component (26) is connected to the bottom side wall of the scraper storage groove (233) via a torsion spring. The scraper component (26) includes a scraper body (260), an elastic buffer noise reduction pad (261), two side baffles (262), two locking pins (263), and two levers (264). The bottom of the scraper body (260) is connected to the bottom side wall of the scraper storage groove (233) via a torsion spring, and the top of the scraper body (260) is inclined towards the side wall of the scraper storage groove (233). An elastic buffer noise reduction pad (261) is installed on one side wall of the scraper body (260) near the scraper storage groove (233). Two side baffles (262) are respectively installed at both ends of one side wall of the scraper body (260) near the scraper storage groove (233). Two locking pins (263) are respectively installed in the middle of the two side baffles (262). Two levers (264) are respectively installed in the middle of both ends of one side wall of the scraper body (260) away from the scraper storage groove (233).

7. The furnace door structure of the bogie hearth furnace according to claim 6, characterized in that: Each collection element (24) includes a collection body (240) and a pull-out ring (241), the collection body (240) being inserted into a collection groove (231) and the pull-out ring (241) being installed at the bottom of the collection body (240).

8. The furnace door structure of the bogie hearth furnace according to claim 7, characterized in that: The upper and lower ends of the guide hinge limiting member (25) are connected to hinge members (251). Each hinge member (251) includes a swing arm (254), a furnace door hinge pin (255) and a slider hinge pin (256). One end of the swing arm (254) is hinged to the upper or lower end of the guide hinge limiting member (25). One end of the furnace door hinge pin (255) is locked in the middle of the swing arm (254), and the other end of the furnace door hinge pin (255) is locked in the upper end of the side wall of the furnace door body (22). One end of the slider hinge pin (256) is locked in the other end of the swing arm (254), and the other end of the slider hinge pin (256) is locked in the middle of the upper slider (23) or the lower slider (27).

9. The furnace door structure of the bogie hearth furnace according to claim 8, characterized in that: The top crossbeam suspension frame (12) includes a top load-bearing main beam (120) and two fixed pulley supports (121). The two ends of the top load-bearing main beam (120) are respectively installed on the top of two vertical main columns (111). The two fixed pulley supports (121) are installed on the top of the top load-bearing main beam (120), and a fixed pulley (122) is rotatably locked in each fixed pulley support (121). One end of the top load-bearing main beam (120) is connected to a main pulley support frame (123). A main pulley support (124) is installed on the top of the main pulley support frame (123), and a main pulley (125) is rotatably locked in the main pulley support (124).

10. The furnace door structure of the bogie hearth furnace according to claim 9, characterized in that: The wire rope traction assembly (30) includes two wire ropes (31) and a traction head (32). One end of each of the two wire ropes (31) is connected to the top of one end of the guide hinge limiter (25) of each of the two swing arms (254). The middle part of each of the two wire ropes (31) is wound around the corresponding fixed pulley (122) and main pulley (125) in sequence. The top of the traction head (32) is connected to the other end of the two wire ropes (31).

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