Supporting and sealing structure for ultra-large furnace door and heat treatment furnace

Abstract

The utility model provides a supporting and sealing structure for an ultra-large furnace door and a heat treatment furnace, the supporting and sealing structure comprises a supporting platform and a locking device, the supporting platform is arranged on a trolley and is used for supporting the bottom of the furnace door; the locking device comprises a driving mechanism and a locking plate, the driving mechanism is connected to the outer side wall of the furnace body, and the locking plate is connected with the driving mechanism and slidably connected with the outer side wall of the furnace body. When the furnace door descends to the supporting platform, the locking plate can be driven by the driving mechanism to pull the furnace door to horizontally move towards one side of the furnace body, so that the furnace door is tightly pressed at the furnace opening of the furnace body, and sealing is formed. According to the supporting and sealing structure for the ultra-large furnace door, the supporting platform is arranged on the trolley, the gravity of the furnace door is transferred to the trolley, extrusion damage to the guide groove in the furnace body is avoided, the service life of the furnace body is prolonged, and the furnace door can be fixed through the horizontal traction effect of the locking device on the furnace door. And the reliability of the sealing effect between the furnace door and the furnace body is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat treatment equipment, specifically relating to a support and sealing structure for an ultra-large furnace door and a heat treatment furnace. Background Technology

[0002] Cart-type heat treatment furnaces are typically used for pre-forging heating of large steel ingots, billets, and plates, or for heat treatment heating of large castings, forgings, and welded parts. The furnace body has a chamber-type furnace chamber with a liftable furnace door at the furnace opening. Burners are installed on the side walls of the furnace chamber, and the furnace bottom is a movable trolley. The workpiece to be treated is placed on a special pad on the surface of the trolley. During heating, the trolley is moved into the furnace, the furnace door is closed to seal it, and the workpiece is heated using the burners. After heating is completed, the furnace door is opened, and the trolley is moved out of the furnace body for unloading.

[0003] In existing technologies, the furnace door is usually raised and lowered along the furnace body by a lifting mechanism. The furnace body is provided with two guide grooves with opposite openings and each inclined to one side of the furnace body. During the process of the furnace door descending, the guide grooves are used to guide the furnace door to move closer to one side of the furnace body, and finally limit the furnace door to the furnace opening. The weight of the furnace door is used to press the sealing material on the inside of the furnace door to the furnace opening, so as to achieve the sealing effect.

[0004] However, for ultra-large heat treatment furnaces, the furnace door area can reach more than 70 square meters and the weight can reach about 15 tons. The weight of the furnace door itself acts on the guide groove of the furnace body for a long time, which can easily squeeze the groove wall and cause it to bend and deform. This not only affects the sealing effect between the furnace door and the furnace body, but also requires frequent shutdowns for maintenance, which increases time costs and affects production efficiency. Utility Model Content

[0005] This utility model provides a support and sealing structure for an ultra-large furnace door, aiming to solve the technical problem in the prior art where the guide groove of the furnace body is bent and deformed due to the long-term action of the furnace door's gravity on the guide groove, which affects the sealing effect.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Firstly, a support and sealing structure for an ultra-large furnace door is provided, comprising:

[0007] A support platform, mounted on a trolley, is used to support the bottom of the furnace door; and

[0008] The locking device includes a drive mechanism and a locking plate. The drive mechanism is connected to the outer wall of the furnace body, and the locking plate is connected to the drive mechanism and slidably connected to the outer wall of the furnace body.

[0009] When the furnace door is lowered to the support platform, the locking plate can pull the furnace door horizontally to one side of the furnace body under the drive of the driving mechanism, so as to press the furnace door tightly against the furnace opening of the furnace body and form a seal.

[0010] In conjunction with the first aspect, in one possible implementation, the supporting platform includes:

[0011] The platform frame is connected to the top surface of the trolley and is positioned vertically corresponding to the furnace door; and

[0012] Multiple guide wheels are rotatably connected to the top of the platform frame for rolling engagement with the bottom of the furnace door; the main shaft of the guide wheel extends perpendicular to the moving direction of the furnace door, and the multiple guide wheels are spaced apart along the extending direction of the platform frame.

[0013] In conjunction with the first aspect, in one possible implementation, the support and sealing structure for an ultra-large furnace door further includes:

[0014] A locking block is attached to the side wall of the furnace door;

[0015] The locking plate is provided with an upward-opening insertion slot, and the locking block can be inserted into the insertion slot when the furnace door is lowered to the support platform.

[0016] In conjunction with the first aspect, in one possible implementation, the drive mechanism includes:

[0017] A telescopic drive member, hinged to the outer wall of the furnace body, has a drive end extending toward the furnace door; and

[0018] A lever, hinged to the outer wall of the furnace body, the lever having a first end hinged to the drive end and a second end hinged to the locking plate;

[0019] The telescopic drive component can drive the lever to swing vertically, so that the locking plate pulls the furnace door to move.

[0020] In some embodiments, the locking device further includes a first mounting bracket, the first mounting bracket comprising:

[0021] A C-shaped frame with a through-cavity mounting cavity; the side opening of the C-shaped frame is connected to the outer wall of the furnace body; the two side walls of the C-shaped frame are provided with through-cavities, and the locking plate slides into the sliding cavities; and

[0022] A hinged support plate is disposed in the mounting cavity and located below the sliding groove, with its two side walls corresponding to the two side walls of the C-shaped frame; the lever is hinged to the hinged support plate.

[0023] In some embodiments, the second end of the lever is provided with two parallel clamping plates, which are located on both sides of the locking plate / the hinge support plate.

[0024] In some embodiments, the locking plate is provided with an elongated hole extending vertically, and the locking plate and the lever are hinged by a pivot shaft that passes through the elongated hole.

[0025] In some embodiments, the telescopic drive member is hinged to the furnace body via a second mounting bracket, the second mounting bracket comprising:

[0026] A support plate is attached to the outer wall of the furnace body and extends horizontally outward;

[0027] Rib plates, connecting the bottom wall of the support plate and the outer wall of the furnace body; and

[0028] Two upright plates are connected above the support plate, and the telescopic drive is hinged between the two upright plates.

[0029] In conjunction with the first aspect, in one possible implementation, the support and sealing structure for an ultra-large furnace door further includes:

[0030] A guide column, connected to the inner wall of the furnace body, is provided with vertically extending limiting grooves; and

[0031] The guide block is connected to the side wall of the furnace door and is located within the limiting groove.

[0032] This embodiment provides a support and sealing structure for an ultra-large furnace door. When the furnace door is in the raised open state, after the trolley transports the workpiece to be processed into the furnace body, the support platform on the trolley is located at the furnace opening. At this time, the furnace door is lowered, and the bottom of the furnace door can be supported above the support platform, which reliably bears the weight of the furnace door. At the same time, the locking plate is moved horizontally by the drive mechanism, thereby pulling the furnace door to one side of the furnace body, so that the furnace door can be pressed tightly at the furnace opening, ensuring that an effective seal is formed between the furnace door and the furnace body, and avoiding the waste of heat energy.

[0033] Compared with existing technologies, this embodiment provides a support and sealing structure for ultra-large furnace doors. By setting a support platform on a trolley, the weight of the furnace door is transferred to the trolley, avoiding crushing damage to the guide grooves on the furnace body, extending its service life, reducing maintenance costs, and helping to improve production efficiency. Furthermore, the horizontal pulling action of the locking device keeps the furnace door pressed tightly against the furnace opening, ensuring the reliability of the seal between the furnace door and the furnace body.

[0034] Secondly, this utility model embodiment also provides a heat treatment furnace, including a furnace body, a furnace door, a trolley, and a support and sealing structure for an ultra-large furnace door as described in any of the preceding claims.

[0035] The beneficial effects of the heat treatment furnace provided in this embodiment are as follows: Compared with the prior art, when the furnace door is lowered, the support platform on the trolley reliably supports the furnace door, thereby transferring the weight of the furnace door to the trolley. This avoids the crushing damage to the guide grooves on the furnace body caused by the oversized furnace door, helping to extend the service life of the furnace body and reduce maintenance costs. Furthermore, the horizontal pulling action of the locking device keeps the furnace door pressed tightly against the furnace opening, ensuring the reliability of the seal between the furnace door and the furnace body and improving the production efficiency of heat treatment. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the main structure of a heat treatment furnace provided in an embodiment of this utility model;

[0038] Figure 2 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the cross-sectional structure along line AA;

[0039] Figure 3 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the cross-sectional structure along the middle BB line;

[0040] Figure 4 This is an embodiment of the present utility model. Figure 3 Enlarged structural diagram of section D in the middle;

[0041] Figure 5 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the C-axis structure;

[0042] Figure 6 A three-dimensional structural diagram of the first mounting bracket, locking plate, and lever provided for an embodiment of this utility model;

[0043] Figure 7 This is an embodiment of the present utility model. Figure 6 Schematic diagram of the structure in mid-section.

[0044] The following are the labeling elements in the figure:

[0045] 1. Support platform; 11. Platform frame; 12. Guide wheel; 2. Locking device; 21. Locking plate; 211. Insertion slot; 212. Long slot; 22. Telescopic drive component; 23. Lever; 231. Clamping plate; 24. First mounting frame; 241. C-shaped frame; 2411. Mounting cavity; 2412. Sliding groove; 242. Hinge support plate; 243. Reinforcing plate; 25. Rotating shaft; 26. Second mounting frame; 261. Support plate; 262. Rib plate; 263. Vertical plate; 3. Locking block; 4. Guide column; 41. Limiting groove; 5. Guide block; 10. Furnace body; 101. Column; 20. Furnace door; 201. Lining; 30. Trolley; 40. Lifting mechanism; 401. Counterweight. Detailed Implementation

[0046] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0047] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0048] Please refer to the following: Figures 1 to 7 The present invention provides a support and sealing structure for an ultra-large furnace door. The support and sealing structure for an ultra-large furnace door includes a support platform 1 and a locking device 2. The support platform 1 is mounted on a trolley 30 and is used to support the bottom of the furnace door 20. The locking device 2 includes a drive mechanism and a locking plate 21. The drive mechanism is connected to the outer wall of the furnace body 10, and the locking plate 21 is connected to the drive mechanism and slidably connected to the outer wall of the furnace body 10.

[0049] When the furnace door 20 is lowered onto the support platform 1, the locking plate 21 can pull the furnace door 20 to move horizontally to one side of the furnace body 10 under the drive of the drive mechanism, so as to press the furnace door 20 against the furnace opening of the furnace body 10 and form a seal.

[0050] This embodiment provides a support and sealing structure for an ultra-large furnace door. When the furnace door 20 is in the raised open state, after the trolley 30 carries the workpiece to be processed into the furnace body 10, the support platform 1 on the trolley 30 is located at the furnace opening. At this time, the furnace door 20 is lowered, and the bottom of the furnace door 20 can be supported above the support platform 1. The support platform 1 reliably bears the weight of the furnace door 20. At the same time, the locking plate 21 is driven to move horizontally through the drive mechanism, thereby pulling the furnace door 20 to one side of the furnace body 10, so that the furnace door 20 can be pressed tightly at the furnace opening, ensuring that an effective seal is formed between the furnace door 20 and the furnace body 10, and avoiding the waste of heat energy.

[0051] Compared with existing technologies, this embodiment provides a support and sealing structure for an ultra-large furnace door. By setting a support platform 1 on the trolley 30, the weight of the furnace door 20 is transferred to the trolley 30, avoiding crushing damage to the guide groove on the furnace body 10, extending its service life, reducing maintenance costs, and helping to improve production efficiency. Furthermore, the horizontal pulling action of the locking device 2 on the furnace door 20 keeps it pressed against the furnace opening, ensuring the reliability of the seal between the furnace door 20 and the furnace body 10.

[0052] The furnace body 10 is equipped with a lifting mechanism 40, which is used to drive the furnace door 20 to rise and fall along the furnace body 10 to open or close the furnace opening of the furnace body 10. To ensure the stability of the furnace door 20 during the rising and falling process, the lifting mechanism 40 is also connected to a counterweight 401. When the furnace door 20 rises, the counterweight 401 falls synchronously; when the furnace door 20 falls, the counterweight 401 rises synchronously.

[0053] The furnace door 20 is a steel structure with a heat-resistant lining 201 on its inner wall. The inner wall of the furnace body 10 is lined with a high-temperature resistant fiber lining. When the furnace door 20 is lowered and the locking device 2 presses the furnace door 20 against the furnace opening, the lining 201 on the furnace door 20 can fit tightly against the fiber lining on the furnace body 10, thereby achieving a reliable seal and helping to save energy consumption.

[0054] A support platform 1 is set on the trolley 30 to support the furnace door 20, which realizes the transfer of the gravity load of the furnace door 20 from the guide groove on the furnace body 10 to the trolley 30. On the one hand, it eliminates the need for the inclined guide groove on the furnace body 10, reducing the processing difficulty. On the other hand, it avoids the squeezing and damage of the guide groove of the furnace body 10 by the extra-large furnace door 20, extends the service life of the furnace body 10, thereby reducing the maintenance frequency and improving production efficiency.

[0055] In some embodiments, the support platform 1 described above may adopt the following approach: Figure 2 The structure shown. See also Figure 2 The support platform 1 includes a platform frame 11 and multiple guide wheels 12. The platform frame 11 is connected to the top surface of the trolley 30 and is arranged vertically and vertically corresponding to the furnace door 20. The multiple guide wheels 12 are rotatably connected to the top of the platform frame 11 and are used to roll with the bottom of the furnace door 20. The main shaft of the guide wheel 12 extends perpendicular to the moving direction of the furnace door 20, and the multiple guide wheels 12 are spaced apart along the extending direction of the platform frame 11.

[0056] In this embodiment, the platform frame 11 is welded from rectangular steel pipes and steel plates. The manufacturing process is simple and the load-bearing capacity is strong. The platform frame 11 extends along the width direction of the furnace door 20 and corresponds vertically to the furnace door 20. It can stably support the bottom of the furnace door 20. Compared with the traditional structure of setting guide grooves on the furnace body 10, there is no need for complex sliding guide calibration on site, which effectively shortens the installation time and improves the economy of the overall structure.

[0057] The arrangement of multiple guide wheels 12 enables the furnace door 20 to form a rolling engagement with the platform frame 11. When the locking device 2 pulls the furnace door 20, it guides the furnace door 20 to move stably to one side of the furnace body 10, which greatly reduces the friction force when the furnace door 20 moves, reduces the wear on the furnace door 20 and the supporting platform 1, and reduces the driving energy consumption.

[0058] In addition, the combined structure of the platform frame 11 and the guide wheel 12 reduces maintenance requirements. The support platform 1 can be quickly maintained by periodically lubricating the mounting bearings of the guide wheel 12 or replacing a single worn guide wheel 12, without having to replace the entire support platform 1.

[0059] In some embodiments, see Figure 1 , Figure 3 , Figure 4 and Figure 5 A support and sealing structure for an ultra-large furnace door also includes a locking block 3, which is connected to the side wall of the furnace door 20; the locking plate 21 is provided with an upward-opening insertion groove 211, and the locking block 3 can be inserted into the insertion groove 211 when the furnace door 20 is lowered onto the support platform 1.

[0060] It should be noted that the length direction of the furnace body 10 is the front-to-back direction, and the width direction is the left-to-right direction. The furnace door 20 is located at the furnace opening on the front side of the furnace body 10. In this embodiment, the locking blocks 3 are respectively connected to the left and right side walls of the furnace door 20.

[0061] Specifically, there are four locking blocks 3, which are respectively set near the four corners of the furnace door 20. Correspondingly, there are also four locking devices 2. By pulling the furnace door 20 synchronously from four directions, the force on the furnace door 20 is more even, which improves the stability of the ultra-large furnace door 20 when it moves and increases the safety factor. On the other hand, by pressing the furnace door 20 from four directions, the reliability of the seal between the furnace door 20 and the furnace body 10 is ensured.

[0062] It should be noted that since the locking block 3 is connected to the left and right side walls of the furnace door 20, and the locking plate 21 needs to be inserted below the corresponding locking block 3, the distance between the upper and lower locking devices 2 on the same side of the furnace door 20 must be greater than or equal to the lifting stroke of the furnace door 20 to avoid interference between the two.

[0063] Specifically, the bottom surface of the locking block 3 and its two sides are chamfered. Similarly, the two side walls of the insertion slot 211 and the top surface of the locking plate 21 are also chamfered. The two sets of chamfers correspond vertically to facilitate the accurate insertion of the locking block 3 into the insertion slot 211 when the furnace door 20 is lowered. Afterward, the drive mechanism moves the locking plate 21 horizontally, thereby stably pulling the furnace door 20 towards one side of the furnace body 10.

[0064] In some embodiments, the drive mechanism described above may employ, for example... Figure 5 The structure shown. See also Figure 5 The driving mechanism includes a telescopic drive member 22 and a lever 23. The telescopic drive member 22 is hinged to the outer wall of the furnace body 10 and has a drive end extending toward the furnace door 20. The lever 23 is hinged to the outer wall of the furnace body 10 and has a first end hinged to the drive end and a second end hinged to the locking plate 21. The telescopic drive member 22 can drive the lever 23 to swing vertically, so that the locking plate 21 pulls the furnace door 20 to move.

[0065] In this embodiment, the telescopic drive component 22 can be either a cylinder or an electric push rod, and is located below the locking plate 21. The middle part of the lever 23 is hinged to the outer wall of the furnace body 10 to form a hinge fulcrum. The drive end of the telescopic drive component 22 extends out, causing the first end of the lever 23 to swing around the hinge fulcrum toward the furnace door 20. At the same time, the second end of the lever 23 swings vertically toward the furnace body 10 around the hinge fulcrum, and causes the locking plate 21 to move horizontally toward the furnace body 10. Thus, by using the insertion and engagement of the locking block 3 and the insertion slot 211, the furnace door 20 is pulled toward the furnace body 10, thereby achieving the pressing of the furnace door 20.

[0066] It should be noted that the distance between the first end of lever 23 and the hinge fulcrum is greater than the distance between the second end and the hinge fulcrum, that is, the power arm is greater than the resistance arm, forming the lever 23 principle, which amplifies the driving force of the telescopic drive component 22, and achieves the effect of forming high-strength clamping with small driving force. This allows for a reduction in the specifications of the telescopic drive component 22 (such as using a cylinder with a smaller cylinder diameter), reducing equipment costs and space occupation.

[0067] In some embodiments, the locking device 2 described above employs, for example... Figure 5 , Figure 6 and Figure 7 The structure shown. See also Figure 5 , Figure 6 and Figure 7 The locking device 2 also includes a first mounting frame 24, which includes a C-shaped frame 241 and a hinged support plate 242. The C-shaped frame 241 has a vertically penetrating mounting cavity 2411, and the side opening end of the C-shaped frame 241 is connected to the outer side wall of the furnace body 10. The two side walls of the C-shaped frame 241 are provided with mutually penetrating sliding grooves 2412, and the locking plate 21 is slidably engaged with the sliding grooves 2412. The hinged support plate 242 is located in the mounting cavity 2411 and below the sliding grooves 2412, and its two side walls are connected to the two side walls of the C-shaped frame 241 one by one. The lever 23 is hinged to the hinged support plate 242.

[0068] The sliding groove 2412 on the C-shaped frame 241 provides sliding support and precise guidance for the locking plate 21, ensuring that the locking plate 21 can stably pull the furnace door 20 to form a seal. The hinged support plate 242 provides hinged support for the lever 23, facilitating the formation of a stable and reliable hinged fulcrum. The C-shaped frame 241, as a rigid support frame for the locking plate 21 and the lever 23, makes the structure more compact and reasonable, ensuring the overall stability of the structure.

[0069] Specifically, the middle part of lever 23 is hinged to hinged support plate 242, and the second end of lever 23 extends upward in mounting cavity 2411 and is hinged to the portion of locking plate 21 located between two sliding grooves 2412. Furthermore, a reinforcing plate 243 is also connected in mounting cavity 2411. In the vertical direction, reinforcing plate 243 is located between sliding groove 2412 and hinged support plate 242, and reinforcing plate 243 has clearance holes for lever 23 to pass through. Reinforcing plate 243 further increases the support rigidity of C-shaped frame 241.

[0070] In some embodiments, the lever 23 described above employs, for example... Figure 6 or Figure 7 The structure shown. See also Figure 6 or Figure 7 The second end of the lever 23 is provided with two parallel clamping plates 231, which are located on both sides of the locking plate 21 / hinged support plate 242.

[0071] After the locking plate 21 is installed on the sliding groove 2412, it is in the same vertical plane as the hinge support plate 242. The two clamping plates 231 on the lever 23 are located on both sides of the locking plate 21 and the hinge support plate 242, forming a symmetrical hinge structure, which makes the hinge fulcrum more stable and the force on the locking plate 21 more even, thereby driving the furnace door 20 to move more smoothly.

[0072] In some embodiments, the locking plate 21 adopts, for example, Figure 5 The structure shown. See also Figure 5 The locking plate 21 is provided with an elongated hole 212 extending vertically. The locking plate 21 and the lever 23 are hinged by a pivot 25, which passes through the elongated hole 212.

[0073] When lever 23 swings vertically around the hinge fulcrum, an angle change occurs between it and the horizontally sliding locking plate 21. The elongated hole 212 allows the rotating shaft 25 to slide along its hole wall, thereby compensating for the angle change between lever 23 and locking plate 21 and preventing jamming.

[0074] It should be noted that the angular deviation between the lever 23 and the driving end of the telescopic drive 22 is compensated by the hinge structure between the telescopic drive 22 and the outer wall of the furnace body 10.

[0075] In some embodiments, the telescopic drive member 22 and the furnace body 10 are connected by a means such as Figure 5 The structure shown. See also Figure 5 The telescopic drive component 22 is hinged to the furnace body 10 via the second mounting bracket 26. The second mounting bracket 26 includes a support plate 261, a stiffening plate 262, and two upright plates 263. The support plate 261 is connected to the outer side wall of the furnace body 10 and extends horizontally outward. The stiffening plate 262 is connected between the bottom wall of the support plate 261 and the outer side wall of the furnace body 10. The two upright plates 263 are connected above the support plate 261, and the telescopic drive component 22 is hinged between the two upright plates 263.

[0076] The support plate 261 and the stiffening plate 262 form a stable triangular support structure, and the two upright plates 263 provide hinged support for the telescopic drive component 22, ensuring the reliable installation of the telescopic drive component 22. Furthermore, both upright plates 263 are bolted to the support plate 261, which facilitates the installation and subsequent disassembly and maintenance of the telescopic drive component 22.

[0077] In some implementations, see Figure 3 and Figure 4A support and sealing structure for an ultra-large furnace door also includes a guide column 4 and a guide block 5. The guide column 4 is connected to the inner side wall of the furnace body 10 and is provided with a limiting groove 41 extending vertically. The guide block 5 is connected to the side wall of the furnace door 20 and is located in the limiting groove 41.

[0078] Specifically, the furnace body 10 has columns 101 on both sides of the furnace opening, and guide columns 4 are set inside the columns 101 of the furnace body 10. The opening of the limiting groove 41 faces the furnace door 20, and guide blocks 5 are respectively set on the left and right side walls of the furnace door 20. During the process of the lifting mechanism 40 driving the furnace door 20 to rise and fall, the guide blocks 5 move up and down along the limiting groove 41 to prevent the furnace door 20 from shaking significantly when rising and falling.

[0079] A rubber guide wheel can be further installed on the guide block 5. When the furnace door 20 swings back and forth during the lifting process, the rubber guide wheel is used to form a flexible contact with the inner wall of the limiting groove 41 to prevent excessive wear on the limiting groove 41.

[0080] It should be noted that when the furnace door 20 is lowered onto the support platform 1, the locking device 2 will pull the furnace door 20 to one side of the furnace body 10. At this time, the guide block 5 needs to move synchronously in the limiting groove 41. Therefore, the width of the limiting groove 41 must be greater than the width of the guide block 5 to avoid interfering with the movement of the furnace door 20 and affecting the pressing state of the furnace door 20, thereby avoiding sealing failure.

[0081] Based on the same inventive concept, this application also provides a heat treatment furnace, including a furnace body 10, a furnace door 20, a trolley 30, and a support and sealing structure for an ultra-large furnace door as proposed in any of the preceding claims.

[0082] The furnace door 20 is located at the furnace opening on the front side of the furnace body 10, and can be raised to open the furnace opening or lowered to seal the furnace opening under the drive of the lifting mechanism 40. The trolley 30 can carry the workpiece to be processed and slide into the furnace body 10 so that the workpiece can be heated inside the furnace body 10.

[0083] This embodiment of the heat treatment furnace, compared with the prior art, provides a method where, when the furnace door 20 is lowered, the support platform 1 on the trolley 30 reliably supports the furnace door 20, thereby transferring the weight of the furnace door 20 to the trolley 30. This avoids the large furnace door 20 causing crushing damage to the guide groove on the furnace body 10, helping to extend the service life of the furnace body 10 and reduce maintenance costs. Furthermore, the locking device 2 horizontally pulls the furnace door 20, keeping it pressed against the furnace opening, ensuring the reliability of the seal between the furnace door 20 and the furnace body 10, and improving the production efficiency of heat treatment.

[0084] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A support and sealing structure for an ultra-large furnace door, characterized in that, include: A support platform (1) is set on a trolley (30) and is used to support the bottom of the furnace door (20); as well as The locking device (2) includes a drive mechanism and a locking plate (21). The drive mechanism is connected to the outer wall of the furnace body (10), and the locking plate (21) is connected to the drive mechanism and is slidably connected to the outer wall of the furnace body (10). When the furnace door (20) is lowered onto the support platform (1), the locking plate (21) can pull the furnace door (20) horizontally toward the side of the furnace body (10) under the drive of the driving mechanism, so as to press the furnace door (20) against the furnace opening of the furnace body (10) and form a seal.

2. The support and sealing structure for an ultra-large furnace door as described in claim 1, characterized in that, The support platform (1) includes: The platform frame (11) is connected to the top surface of the trolley (30) and is vertically aligned with the furnace door (20); and Multiple guide wheels (12) are rotatably connected to the top of the platform frame (11) for rolling engagement with the bottom of the furnace door (20); the main shaft of the guide wheel (12) extends perpendicular to the moving direction of the furnace door (20), and the multiple guide wheels (12) are spaced apart along the extending direction of the platform frame (11).

3. The support and sealing structure for an ultra-large furnace door as described in claim 1, characterized in that, The aforementioned support and sealing structure for ultra-large furnace doors further includes: Locking block (3) is connected to the side wall of the furnace door (20); The locking plate (21) is provided with an upward-opening insertion slot (211), and the locking block (3) can be inserted into the insertion slot (211) when the furnace door (20) is lowered onto the support platform (1).

4. The support and sealing structure for an ultra-large furnace door as described in claim 1, characterized in that, The drive mechanism includes: A telescopic drive member (22), hinged to the outer wall of the furnace body (10), has a drive end extending toward the furnace door (20); and A lever (23) is hinged to the outer wall of the furnace body (10), the lever (23) having a first end hinged to the drive end and a second end hinged to the locking plate (21); The telescopic drive (22) can drive the lever (23) to swing vertically so that the locking plate (21) pulls the furnace door (20) to move.

5. A support and sealing structure for an ultra-large furnace door as described in claim 4, characterized in that, The locking device (2) further includes a first mounting bracket (24), which includes: A C-shaped frame (241) has a through mounting cavity (2411) extending vertically. The side opening of the C-shaped frame (241) is connected to the outer side wall of the furnace body (10). The two side walls of the C-shaped frame (241) are provided with through sliding grooves (2412), and the locking plate (21) slides in cooperation with the sliding grooves (2412). The hinged support plate (242) is located in the mounting cavity (2411) and below the sliding groove (2412), and its two side walls are connected to the two side walls of the C-shaped frame (241) one by one; the lever (23) is hinged to the hinged support plate (242).

6. The support and sealing structure for an ultra-large furnace door as described in claim 5, characterized in that, The second end of the lever (23) is provided with two parallel clamping plates (231), which are located on both sides of the locking plate (21) / the hinge support plate (242).

7. A support and sealing structure for an ultra-large furnace door as described in claim 4, characterized in that, The locking plate (21) is provided with an elongated hole (212) extending vertically. The locking plate (21) and the lever (23) are hinged by a pivot (25), which passes through the elongated hole (212).

8. A support and sealing structure for an ultra-large furnace door as described in claim 4, characterized in that, The telescopic drive component (22) is hinged to the furnace body (10) via a second mounting bracket (26), the second mounting bracket (26) comprising: A support plate (261) is connected to the outer wall of the furnace body (10) and extends horizontally outward; Rib plate (262), connecting the bottom wall of the support plate (261) and the outer side wall of the furnace body (10); and Two upright plates (263) are connected above the support plate (261), and the telescopic drive (22) is hinged between the two upright plates (263).

9. A support and sealing structure for an ultra-large furnace door as described in claim 1, characterized in that, The aforementioned support and sealing structure for ultra-large furnace doors further includes: A guide post (4) is connected to the inner wall of the furnace body (10), and the guide post (4) is provided with a vertically extending limiting groove (41); and The guide block (5) is connected to the side wall of the furnace door (20) and is located in the limiting groove (41).

10. A heat treatment furnace, characterized in that, It includes a furnace body (10), a furnace door (20), a trolley (30), and a support and sealing structure for an ultra-large furnace door as described in any one of claims 1-9.

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