Lift door mechanism for furnace enclosure

Abstract

The application discloses a lifting door mechanism for furnace body sealing, which comprises a door frame fixedly arranged at a furnace opening of a furnace body and a door plate assembly for sealing the furnace opening; and further comprises a lifting guide assembly, which comprises a door plate connecting piece, a first limiting connecting piece and a second limiting connecting piece. According to the application, the first door plate and the second door plate are connected through a spring, so that the relative displacement between the two within a certain range is enabled, and the relative displacement path between the first door plate and the second door plate is limited through the first limiting connecting piece and the second limiting connecting piece of the lifting guide assembly. After the overall lifting action of the door plate assembly, the first door plate and the second door plate of the door plate assembly can still perform another relative displacement. In the process of closing the furnace opening, the spring between the first door plate and the second door plate is compressed to generate elastic force, so that the second door plate is pressed against the door frame, and the sealing cooperation effect between the sealing surface on the second door plate and the door frame is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of sealing door technology, and in particular to a lifting door mechanism for sealing furnace bodies. Background Technology

[0002] In the use of various furnace bodies, it is necessary to seal the furnace opening through an openable and closable sealing door. Currently, the commonly used method is to open and close the furnace opening by flipping the sealing door inward or outward, thereby opening or closing the furnace opening and sealing it to prevent the material or heat inside the furnace from leaking outward. However, the flip-type sealing door occupies a large space during the opening process, which is not convenient for use in compact furnace bodies or small working spaces.

[0003] Patent document CN103477012A discloses a sliding door, particularly for garages, in which the door is opened and closed through the cooperation of a side support arm and a vertical guide. While this sliding and lifting mechanism reduces space requirements, it lacks good sealing performance and is therefore unsuitable for applications requiring strict sealing, such as furnaces. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a lifting door mechanism for sealing the furnace body, which can improve the sealing effect of the furnace opening while reducing the space occupied during opening and closing.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a lifting door mechanism for sealing the furnace body, including a door frame fixedly installed at the furnace opening of the furnace body and a door panel assembly for sealing the furnace opening, and a lifting drive assembly for driving the lifting and lowering movement of the door panel assembly. The door panel assembly includes a first door panel and a second door panel spaced apart and connected by multiple springs. The side of the second door panel away from the first door panel is a sealing surface that forms a sealing fit with the door frame. The lifting guide assembly also includes a door panel connector, a first limiting connector, and a second limiting connector. The lifting drive assembly is drivenly connected to the door panel connector. The first limiting connector and the second limiting connector are respectively hinged to the upper and lower ends of the door panel connector, and both the first limiting connector and the second limiting connector are hinged to the first door panel. This invention utilizes a lifting guide assembly that controls the opening and closing of a lifting door under the drive of a lifting drive component. This lifting guide assembly controls the movement trajectory of the door panel assembly, which opens and closes the furnace opening through lifting motion, effectively reducing space occupation. The invention employs a split-structure door panel assembly consisting of a first door panel and a second door panel. The first and second door panels are connected by a spring, allowing for relative displacement within a certain range. The first and second limiting connectors of the lifting guide assembly restrict the relative displacement path between the first and second door panels. After the entire door panel assembly has performed a lifting motion, the first and second door panels can still undergo another period of relative displacement. During the process of closing the furnace opening, after the door panel assembly moves to contact the door frame with the cooperation of the lifting drive component and the lifting guide assembly, the first door panel can move relative to the second door panel. The elastic force generated by the compression of the spring between the first and second door panels presses the second door panel firmly against the door frame, effectively improving the sealing effect between the sealing surface of the second door panel and the door frame, thus enhancing the sealing effect of the furnace opening.

[0006] As an improvement to the above solution: the lifting guide assembly further includes a guide slide, which is provided with a limiting groove that forms a limiting fit with the first limiting connector and the second limiting connector; the guide slide is fixedly installed on the door frame, and the limiting groove is composed of a lifting limiting groove that extends vertically along the lifting path of the door panel assembly and a sealing limiting groove that extends horizontally toward the interior of the furnace body perpendicular to the lifting limiting groove.

[0007] As an improvement to the above solution: a sliding part is fixedly provided on the first limiting connector to form a sliding engagement with the limiting groove of the guide slide part; two sliding parts are fixedly provided on the second limiting connector to form a sliding engagement with the limiting groove of the guide slide part; the two sliding parts on the second limiting connector are spaced apart; there is a gap between the sliding part and the groove wall of the limiting groove in the width direction of the limiting groove; when the door panel assembly seals the furnace opening under the drive of the lifting drive assembly, one of the sliding parts on the second limiting connector slides from the lifting limiting groove to the sealing limiting groove.

[0008] As an improvement to the above solution: the lifting drive assembly includes a drive component and a drive connector; the two ends of the drive component are a fixed end and an output end, respectively. The fixed end of the drive component is fixedly mounted on the furnace body, and the output end of the drive component is hingedly connected to the drive connector. The drive connector is fixedly connected to the door panel connector; the door panel connector is a U-shaped connector that fastens onto the guide slide rail, and the door panel connector forms a limiting fit with the guide slide rail in the width direction. This invention achieves the drive component's movement of the door panel connector by hingedly engaging the drive component and the drive connector, ultimately transmitting the movement to the door panel assembly to drive its lifting action. The limiting fit formed by the door panel connector fastening onto the guide slide rail ensures the stability of the door panel connector's movement and protects the guide slide rail and the limiting connector. Simultaneously, it achieves efficient use of space by arranging the lifting limiting groove and the sealing limiting groove on the side of the guide slide rail, ensuring that the movement of the first and second limiting connectors does not interfere with other components.

[0009] As an improvement to the above solution, the lifting guide assembly further includes a slider and a guide rail. The guide rail is fixedly mounted on the door frame, and the slider slides in conjunction with the guide rail. A slider connector is fixedly connected to the slider, and the slider connector is also fixedly connected to the drive connector and the door panel connector. This invention guides the movement of the door panel connector by using a slider and a guide rail, thereby further improving the stability of the door panel connector's movement and preventing it from shifting during movement.

[0010] As an improvement to the above solution, the lifting limit groove and the sealing limit groove have a linear transition. This invention achieves a smooth transition between the lifting limit groove and the sealing limit groove through a linear transition, providing stable guidance for the movement of the sliding part of the second limiting connector between the lifting limit groove and the sealing limit groove. Compared to an arc transition, the horizontal movement distance of the sliding part of the second limiting connector is linearized, resulting in smoother and more efficient movement, and facilitating precise automated control.

[0011] As an improvement to the above solution, it also includes limiting ear plates fixedly installed on both sides of the first door panel, with the two limiting ear plates forming a limiting fit with the second door panel from both sides; the limiting ear plates are provided with limiting holes extending horizontally along the thickness direction of the door panel assembly, and limiting shafts are fixedly installed on both sides of the second door panel, which are inserted into the limiting holes and form a limiting fit with the limiting holes. This invention achieves the limitation of relative displacement between the first door panel and the second door panel through the limiting fit between the limiting ear plates and the limiting shafts, ensuring that the first door panel and the second door panel can only move relative to each other in the thickness direction of the door panel assembly, i.e., the horizontal direction, and will not shift during the relative displacement process; at the same time, it can also further achieve a stable connection between the first door panel and the second door panel based on the spring connection, and the spring between the first door panel and the second door panel can only be used to provide the clamping force when sealing the furnace opening, without having to bear stress in other directions, which can effectively improve the service life of the spring.

[0012] As an improvement to the above solution: the sliding portion on the first limiting connector is concentrically disposed at the hinge point between the first limiting connector and the door panel connector; the two sliding portions on the second limiting connector are concentrically disposed at the hinge points between the second limiting connector and the door panel connector, and at the hinge point between the second limiting connector and the first door panel, respectively. By limiting the positions of the sliding portions on the first and second limiting connectors, this invention provides a stable force transmission path for the movement of the two limiting connectors.

[0013] The beneficial effects of this invention are as follows: This invention uses a lifting guide assembly that controls the opening and closing of the lifting door under the drive of the lifting drive assembly. This lifting guide assembly can control the movement trajectory of the door panel assembly. The door panel assembly opens and closes the furnace opening through lifting movement, thereby effectively reducing space occupation. This invention utilizes a guide slide to limit the sliding paths of the first and second limiting connectors, allowing the first and second door panels to undergo another relative displacement after the overall lifting movement of the door panel assembly. During the closing of the furnace opening, after the door panel assembly moves to contact the door frame under the cooperation of the lifting drive assembly and the lifting guide assembly, the guide slide guides the second limiting connector through the sealing limiting groove, causing the first door panel to move relative to the second door panel. The elastic force generated by the compression of the spring between the first and second door panels presses the second door panel tightly against the door frame, thereby effectively improving the sealing effect between the sealing surface of the second door panel and the door frame, i.e., improving the sealing effect of the furnace opening. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the door panel assembly. Figure 3This is a schematic diagram of the cooperation structure between the door panel assembly and the lifting drive assembly; Figure 4 This is a schematic diagram of the cooperation structure between the lifting drive assembly and the lifting guide assembly; Figure 5 This is a schematic diagram of the mating structure between the limiting connector and the guide slide. Figure 6 This is a schematic diagram of the mating structure between the limiting connector and the guide slide. Figure 7 This is a schematic diagram illustrating the changing relationship between the limiting connector and the guide slide during the closing process of the door panel assembly.

[0015] The components in the diagram are labeled as follows: 100-Door frame, 200-Door panel assembly, 210-First door panel, 211-Limiting ear plate, 212-Limiting hole, 220-Second door panel, 221-Sealing surface, 222-Limiting shaft, 230-Spring, 300-Lifting drive assembly, 310-Drive component, 320-Drive connector, 400-Lifting guide assembly, 410-Door panel connector, 420-Guide slide rail component, 421-Lifting limit groove, 422-Sealing limit groove, 430-First limit connector, 440-Second limit connector, 451-Sliding part, 452-Power lifting end, 453-Door connection end, 460-Slider, 470-Guide rail, 480-Slider connector. Detailed Implementation

[0016] To facilitate understanding of the present invention, the invention will be further described below with reference to the accompanying drawings.

[0017] In the description of this invention, it should be noted that the terms "front", "rear", "left", "right", "up", "down", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of description, and do not indicate or imply that the device or component 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 invention.

[0018] like Figure 1 to Figure 3As shown, the lifting door mechanism for sealing the furnace body disclosed in this invention is used to open and close the furnace opening. A door frame 100 is fixedly installed at the furnace opening. This invention controls the movement of the door panel assembly 200 relative to the door frame 100. The door panel assembly 200 closes the furnace opening by moving closer to the door frame 100 and abutting against it to form a sealing fit. The door panel assembly 200 opens the furnace opening by detaching from and moving away from the door frame 100. The movement of the door panel assembly 200 includes, but is not limited to, lifting movements, and is driven by a lifting drive assembly 300 installed on the furnace body. Compared with the prior art method of controlling the opening and closing of the furnace opening by flipping the door panel, this invention can effectively reduce the space occupied in front of the furnace opening, thus making it suitable for opening and closing the furnace opening in confined spaces.

[0019] In order to improve the sealing effect of the door panel assembly 200 on the furnace opening when the furnace opening is closed, the present invention has improved the structure of the door panel assembly 200 and set up a lifting guide assembly 400 to further control the movement trajectory of the door panel assembly 200.

[0020] Specifically, such as Figure 1 and Figure 2 As shown, the door panel assembly 200 is a split structure including a first door panel 210 and a second door panel 220. The first door panel 210 and the second door panel 220 have a gap in the thickness direction of the door panel assembly 200, and are connected by multiple springs 230, allowing them to move relative to each other within a certain distance. The first door panel 210 cooperates with the lifting guide assembly 400, and the second door panel 220 cooperates with the door frame 100. The side of the second door panel 220 away from the first door panel 210 is a sealing surface 221 that can form a sealing fit with the door frame 100. When closing the furnace opening, the elastic force of the springs 230 can push the second door panel 220 further closer to the door frame 100 fixedly located at the furnace opening, thereby pressing the second door panel 220 tightly onto the door frame 100 to improve the sealing effect of the door panel assembly 200 on the furnace opening.

[0021] Furthermore, such as Figure 1 and Figure 2As shown, in order to improve the stability of the relative movement between the first door panel 210 and the second door panel 220 and ensure that the relative movement between the first door panel 210 and the second door panel 220 does not deviate, the door panel assembly 200 of the present invention is further provided with a limiting assembly consisting of a limiting ear plate 211 and a limiting shaft 222. The limiting ear plate 211 is fixedly disposed on both sides of the first door panel 210, and the limiting ear plate 211 limits the second door panel 220 from both sides. The limiting shaft 222 is fixedly disposed on both sides of the second door panel 220, and the limiting ear plate 211 and the limiting shaft 222 are in a one-to-one correspondence. A limiting hole 212 extending horizontally along the thickness direction of the door panel assembly 200 is provided on the limiting ear plate 211, and the limiting shaft 222 is inserted into the limiting hole 212 of the corresponding limiting ear plate 211 to form a sliding fit, so that the limiting shaft 222 can slide along the limiting hole 212. The present invention, through the cooperation of the limiting ear plate 211 and the limiting shaft 222, firstly, the limiting ear plate 211 can laterally limit the second door panel 220, preventing lateral displacement between the first door panel 210 and the second door panel 220. Secondly, through the limiting hole 212 limiting the limiting shaft 222, the relative translational path between the first door panel 210 and the second door panel 220 is maintained in the thickness direction of the door panel assembly 200, i.e., the horizontal direction. Finally, the cooperation of the limiting ear plate 211 and the limiting shaft 222 can also provide a stable connection between the first door panel 210 and the second door panel 220. The spring 230 can only provide axial elastic force and does not need to bear forces in other directions, avoiding adverse effects on the spring 230.

[0022] Specifically, such as Figure 1 , Figures 3 to 5As shown, the lifting guide assembly 400 includes a door panel connector 410, a guide slide 420, a first limiting connector 430, and a second limiting connector 440. The door panel connector 410 connects the lifting drive assembly 300 to the door panel assembly 200. The door panel connector 410 is a movable structure. The guide slide 420 is fixedly installed on the door frame 100 and is arranged along the lifting path of the door panel assembly 200, i.e., in the vertical direction. The door panel connector 410 and the guide slide 420 form a sliding fit, allowing the door panel connector 410 to move along the guide slide 420. One side of the door panel connector 410 is connected to the lifting drive assembly 300, and the other side of the door panel connector 410 is connected to the first door panel 210 in the door panel assembly 200 via the first limiting connector 430 and the second limiting connector 440. The two limiting connectors are hinged to the door panel connector 410 and to the first door panel 210. The first limiting connector 430 is hinged to the upper end of the door panel connector 410, and the second limiting connector 440 is hinged to the lower end of the door panel connector 410. A limiting groove is provided on the guide slide 420, and both the first limiting connector 430 and the second limiting connector 440 slide in engagement with the limiting groove. The preferred location for the limiting groove is on the side of the guide slide 420, i.e., the side of the guide slide 420 closest to the door panel assembly. This reduces space occupation, facilitates structural layout, and improves space utilization.

[0023] like Figure 6 As shown, both the first limiting connector 430 and the second limiting connector 440 consist of a connecting portion and a power lifting end 452 and a door connecting end 453 respectively disposed at both ends of the connecting portion. The power lifting end 452 is connected to the door panel connector 410 via a rotating shaft, and the door connecting end 453 is connected to the first door panel 210 via a rotating shaft. The sliding portion 451 on the first limiting connector 430 is concentrically disposed at the hinge point between the first limiting connector 430 and the door panel connector 410; the two sliding portions 451 on the second limiting connector 440 are concentrically disposed at the hinge point between the second limiting connector 440 and the door panel connector 410 and the hinge point between the second limiting connector 440 and the first door panel 210, respectively.

[0024] like Figures 5 to 7As shown, the limiting groove on the guide slide 420 is composed of a lifting limiting groove 421 and a sealing limiting groove 422 connected together. The lifting limiting groove 421 extends vertically along the lifting path of the door panel assembly 200, and the sealing limiting groove 422 extends horizontally along the thickness direction of the door panel assembly 200. The lifting limiting groove 421 and the sealing limiting groove 422 are connected. The first limiting connector 430 and the second limiting connector 440 are both slidably engaged with the limiting groove through a sliding part 451. The sliding part 451 has a cylindrical structure. There is a gap between the sliding part 451 and the groove wall of the limiting groove in the width direction of the limiting groove, that is, the width of the limiting groove is greater than the diameter of the sliding part 451, so that the first limiting connector 430 and the second limiting connector 440 can have a certain range of translational path in the horizontal direction. The difference between the first limiting connector 430 and the second limiting connector 440 is that the first limiting connector 430 has only one sliding part 451, while the second limiting connector 440 has two sliding parts 451, and the two sliding parts 451 of the second limiting connector 440 are spaced apart on the second limiting connector 440. Figure 5 and Figure 6 As shown, the sliding part 451 of the first limiting connector 430 and the mating part of the limiting groove is the lifting limiting groove 421. The mating parts of the two sliding parts 451 of the second limiting connector 440 and the limiting groove include both the lifting limiting groove 421 and the sealing limiting groove 422. When the lifting drive assembly 300 drives the door panel assembly 200 to move up and down, both the first limiting connector 430 and the second limiting connector 440 slide vertically along the lifting limiting groove 421 of the limiting groove. When a relative displacement occurs between the first door panel 210 and the second door panel 220, the sliding part 451 located at the lower end of the second limiting connector 440 moves from the lifting limiting groove 421 to the sealing limiting groove 422 or from the sealing limiting groove 422 to the lifting limiting groove 421.

[0025] Furthermore, such as Figures 5 to 7 As shown, in this invention, the lifting limit groove 421 and the sealing limit groove 422 are connected by a straight line segment. That is, the transition between the lifting limit groove 421 and the sealing limit groove 422 is not arc-shaped but a straight line transition, preferably a diagonal transition. With the above structural limitation, the straight line segment can guide and smoothly transition between the lifting limit groove 421 and the sealing limit groove 422, linearizing the horizontal movement distance of the sliding part 451 at the lower end of the second limiting connector 440 as it moves from the lifting limit groove 421 to the sealing limit groove 422. This results in higher movement efficiency and easier control of the movement path.

[0026] Specifically, such as Figure 4As shown, the lifting drive assembly 300 of the present invention includes a drive component 310 and a drive connector 320. The drive component 310 is preferably a cylinder drive component, with a fixed end and an output end at its two ends, respectively. The fixed end of the drive component 310 is fixedly mounted on the furnace body, and the output end of the drive component 310 is hinged to the drive connector 320 via a rotating shaft. The drive connector 320 is fixedly connected to the door panel connector 410. To ensure the stable movement of the door panel connector 410 under the drive of the drive member 310 without deviation, the present invention also includes a slider 460, a guide rail 470, and a slider connector 480 to guide the movement of the door panel connector 410. The guide rail 470 is fixedly mounted on the door frame 100, extending vertically along the lifting and lowering direction of the door panel assembly 200. The slider 460 slides with the guide rail 470. The slider connector 480 is fixed to the slider 460 and is also fixedly connected to both the drive connector 320 and the door panel connector 410. The door panel connector 410 can be a U-shaped connector that snaps onto the guide groove 420, forming a limiting fit between the door panel connector 410 and the guide groove 420 in the width direction, further enhancing the limiting and guiding effect on the lifting and lowering movement of the door panel connector 410.

[0027] like Figure 7 As shown, when controlling the opening and closing of the furnace opening, when the furnace opening is open, both the door panel connector 410 and the door panel assembly 200 are in a high position. The sliding part 451 of the first limiting connector 430 is located in the lifting limiting groove 421, and the upper and lower sliding parts 451 of the second limiting connector 440 are also located in the lifting limiting groove 421. There is a gap between the sliding parts 451 of the first limiting connector 430 and the second limiting connector 440 and the groove wall of the lifting limiting groove 421. As the lifting drive assembly 300 drives the door panel connector 410 and the door panel assembly 200 to descend from the high position, water can also be used during the synchronous descent of the first limiting connector 430 and the second limiting connector 440. The horizontal translation continues until the sliding part 451 of the first limiting connector 430 moves to abut against the wall of the lifting limiting groove 421. The sliding part 451 at the lower end of the second limiting connector 440 moves into the sealing limiting groove 422. The entire door panel assembly 200 descends synchronously and moves a distance toward the furnace opening so that the sealing surface 221 of the second door panel 220 approaches the door frame 100. Then, the spring 230 between the first door panel 210 and the second door panel 220 is compressed. The elastic force of the spring 230 pushes the second door panel 220 to continue to move toward the door frame 100 for a second stage of translation. Under the elastic force of the spring 230, the second door panel 220 is pressed against the door frame 100, achieving an effective seal on the furnace opening.

[0028] In summary, the lifting door mechanism for furnace body sealing disclosed in this invention, through the cooperation of two limiting connectors with the limiting grooves on the guide slide 420, has the following advantages compared to existing lifting door structures: The present invention uses the sliding part 451 on the two limiting connectors to form a clearance fit with the limiting groove on the guide slide 420, so that the sliding part 451 can translate a certain distance in the horizontal direction of the limiting groove. During the opening and closing of the furnace opening, the translation of the sliding part 451 in the horizontal direction of the limiting groove, the elastic compression of the spring 230 between the first door panel 210 and the second door panel 220, and the elastic compression of the sealing surface 221 on the second door panel 220 can make the second door panel 220 perform multi-stage displacement, thereby ensuring the sealing effect of the door panel assembly 200 on the furnace opening when closing the furnace opening.

[0029] This invention provides a lifting guide assembly 400 between the lifting drive assembly 300 and the door panel assembly 200, and limits both the lifting guide assembly 400 and the lifting drive assembly 300 to the side of the door panel assembly 200. Simultaneously, the door panel connector 410 in the lifting guide assembly 400 adopts a U-shaped structure, and the limiting groove on the guide slide 420, as well as the first limiting connector 430 and the second limiting connector 440, are all located within the U-shaped space of the door panel connector 410. Furthermore, the axial direction of the sliding portion 451, the axial direction of the power lifting end 452, and the axial direction of the door connecting end 453 on the first limiting connector 430 all face the side of the door panel assembly 200. Through this structure, the invention effectively ensures its operation in confined spaces: firstly, it avoids adding extra space directly in front of the furnace opening, provided that a necessary gap is maintained between the door panel assembly 200 and the furnace opening; secondly, it effectively reduces the space occupied by structures located on the side of the door panel assembly 200.

[0030] The present invention forms a clearance fit between the limiting groove of the guide slide 420 and the sliding part 451 of the limiting connector, which can form an effective retraction avoidance and compression seal during the lifting and lowering process of the second door panel 220, thereby improving the reliability of the overall lifting and lowering action of the door panel assembly 200. In addition, the present invention can effectively improve the stability of the door panel assembly 200 movement process by using the straight transition between the lifting limiting groove 421 and the sealing limiting groove 422 in the limiting groove, combined with the sliding fit between the sliding part 451 and the limiting groove.

[0031] This document presents a description of various embodiments of the invention for illustrative purposes only and is not intended to be exhaustive or limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A lifting door mechanism for sealing a furnace body, comprising a door frame (100) fixedly disposed at the furnace opening of the furnace body and a door panel assembly (200) for sealing the furnace opening, and further comprising a lifting drive assembly (300) for driving the lifting movement of the door panel assembly (200), characterized in that: The door panel assembly (200) includes a first door panel (210) and a second door panel (220) spaced apart and connected by multiple springs (230). The side of the second door panel (220) away from the first door panel (210) is a sealing surface (221) that forms a sealing fit with the door frame (100). It also includes a lifting guide assembly (400), which includes a door panel connector (410), a first limiting connector (430), and a second limiting connector (440). The lifting drive assembly (300) is driven to the door panel connector (410). The first limiting connector (430) and the second limiting connector (440) are respectively hinged to the upper and lower ends of the door panel connector (410), and both the first limiting connector (430) and the second limiting connector (440) are hinged to the first door panel (210).

2. The lifting door mechanism for sealing the furnace body as described in claim 1, characterized in that: The lifting guide assembly (400) also includes a guide slide (420), which is provided with a limiting groove that forms a limiting fit with the first limiting connector (430) and the second limiting connector (440). The guide slide (420) is fixedly installed on the door frame (100), and the limiting groove is composed of a lifting limiting groove (421) that extends vertically along the lifting path of the door panel assembly (200) and a sealing limiting groove (422) that extends horizontally toward the furnace body and perpendicular to the lifting limiting groove (421).

3. The lifting door mechanism for sealing the furnace body as described in claim 2, characterized in that: The first limiting connector (430) is fixedly provided with a sliding part (451) that forms a sliding fit with the limiting groove of the guide slide (420). The second limiting connector (440) is fixedly provided with two sliding parts (451) that form a sliding fit with the limiting groove of the guide slide (420), and the two sliding parts (451) on the second limiting connector (440) are spaced apart. There is a gap between the sliding part (451) and the groove wall of the limiting groove in the width direction of the limiting groove. When the door panel assembly (200) seals the furnace opening under the drive of the lifting drive assembly (300), one of the sliding parts (451) on the second limiting connector (440) slides from the lifting limiting groove (421) to the sealing limiting groove (422).

4. The lifting door mechanism for sealing the furnace body as described in claim 2, characterized in that: The lifting drive assembly (300) includes a drive component (310) and a drive connector (320); the two ends of the drive component (310) are a fixed end and an output end, respectively. The fixed end of the drive component (310) is fixedly mounted on the furnace body. The output end of the drive component (310) is hinged to the drive connector (320). The drive connector (320) is fixedly connected to the door panel connector (410). The door panel connector (410) is a U-shaped connector that is fastened to the guide slide (420). The door panel connector (410) forms a limiting fit with the guide slide (420) in the width direction.

5. The lifting door mechanism for sealing the furnace body as described in claim 2, characterized in that: The lifting guide assembly (400) also includes a slider (460) and a guide rail (470). The guide rail (470) is fixedly mounted on the door frame (100), and the slider (460) slides in cooperation with the guide rail (470). A slider connector (480) is fixedly connected to the slider (460), and the slider connector (480) is also fixedly connected to the drive connector (320) and the door panel connector (410).

6. The lifting door mechanism for sealing the furnace body as described in claim 2, characterized in that: The lifting limit groove (421) and the sealing limit groove (422) are connected by a straight line.

7. The lifting door mechanism for sealing the furnace body as described in claim 1, characterized in that: It also includes limiting ear plates (211) fixedly installed on both sides of the first door panel (210), the limiting ear plates (211) forming a limiting fit with the second door panel (220) from both sides; the limiting ear plates (211) are provided with limiting holes (212) extending horizontally along the thickness direction of the door panel assembly (200), and the two side plates of the second door panel (220) are fixedly provided with limiting shafts (222) that are inserted into the limiting holes (212) and form a limiting fit with the limiting holes (212).

8. The lifting door mechanism for sealing the furnace body as described in claim 3, characterized in that: The sliding part (451) on the first limiting connector (430) is concentrically arranged at the hinge point between the first limiting connector (430) and the door panel connector (410); the two sliding parts (451) on the second limiting connector (440) are concentrically arranged at the hinge point between the second limiting connector (440) and the door panel connector (410) and the hinge point between the second limiting connector (440) and the first door panel (210), respectively.

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