Multi-channel rotary furnace door device

Abstract

The utility model discloses a multi-channel rotary furnace door device which comprises furnace doors arranged on channels, the multiple channels are arranged on a furnace body, each channel is correspondingly provided with at least one furnace door, the furnace doors are rotatably connected with the furnace body, and the channels are opened and closed through rotation of the furnace doors. And the driving mechanism is arranged on the furnace body and drives the furnace door to rotate. According to the utility model, different temperature intervals on the production line can be effectively isolated, the stability of the temperature in each temperature interval is ensured, meanwhile, simultaneous parallel control of multiple channels can be realized, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of glass deep processing, in particular to a multi-channel rotary furnace door device. Background Art

[0002] Due to the production process requirements, the same glass deep processing production line is often set with different temperature ranges. For example, the entire heating section of the continuous homogenizing furnace, the preheating furnace of the double-chamber furnace, and the heating furnace on the glass deep processing production line are all set with different temperature ranges. In order to ensure the stability of the furnace temperature in each temperature range, two methods are often used to control the furnace temperature. One is to add a furnace door device between each temperature range to separate the different temperature fields on both sides. For example, in a double-chamber furnace, the method of adding a furnace door device is often a single-channel method, and the production efficiency is low; the other is not to set a furnace door to adjust the temperature of each temperature range by real-time control of the heating amount. For example, in a continuous furnace, the temperature at the junction of the two temperature ranges cannot be accurately controlled by real-time adjustment of the heating. Both of the above methods have certain limitations. Utility Model Content

[0003] In order to overcome at least one of the defects described in the above-mentioned prior art, the utility model provides a multi-channel rotating furnace door device. The utility model can effectively isolate different temperature ranges on the production line, ensure the temperature stability in each temperature range, and at the same time realize multi-channel simultaneous parallel control to improve production efficiency.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A multi-channel rotary furnace door device, comprising:

[0006] A furnace door is arranged on the passage, and a plurality of passages are arranged on the furnace body. Each passage is provided with at least one furnace door corresponding to the passage. The furnace door is rotatably connected to the furnace body, and the furnace door is opened and closed by rotating the passage;

[0007] The driving mechanism is arranged on the furnace body, and the driving mechanism drives the furnace door to rotate.

[0008] In a preferred embodiment, the furnace door includes a door panel, a first connecting shaft and a second connecting shaft, the first connecting shaft is arranged at the upper part of the door panel, the second connecting shaft is arranged at the lower part of the door panel, the first connecting shaft is rotatably connected to the furnace body through a first bearing, and the second connecting shaft is rotatably connected to the furnace body through a second bearing.

[0009] In a preferred embodiment, the furnace body is provided with a door lintel and a door socket at the upper part of the passage, the door socket is provided on the door lintel, and the first bearing is provided in the inner cavity of the door socket;

[0010] The furnace body is provided with a door step and a hinge seat at the lower part of the passage, the hinge seat is arranged on the door step, and the second bearing is arranged in the inner cavity of the hinge seat.

[0011] In a preferred embodiment, the furnace door comprises a spacer sleeve, which is arranged at the bottom of the door panel and sleeved on the outside of the hinge seat.

[0012] In a preferred embodiment, an expansion gap is provided between the second connecting shaft and the door pedal, and the expansion gap is located in the axial direction of the second connecting shaft and the door pedal.

[0013] In a preferred embodiment, the first bearing is connected to the lower portion of the first connecting shaft, and a locking nut is provided in the middle portion of the first connecting shaft, and the locking nut limits the axial position of the first bearing.

[0014] In a preferred embodiment, the driving mechanism includes a driving element, a pull rod, a plurality of swing rods and a plurality of rotating shafts, and the swing rods and the rotating shafts are arranged one-to-one corresponding to the furnace doors;

[0015] One end of the driving element is rotatably connected to the furnace body, the other end of the driving element is rotatably connected to one end of the pull rod, the other end of the pull rod is rotatably connected to one end of the swing rod, and the other end of the swing rod is fixedly connected to the rotating shaft.

[0016] In a preferred embodiment, one end of the rotating shaft is fixedly connected to the swing rod, and the other end of the rotating shaft is fixedly connected to the furnace door;

[0017] The rotating shaft is rotatably connected to the furnace body through the third bearing. A bearing seat is arranged on the furnace body, and the third bearing is arranged in the inner cavity of the bearing seat.

[0018] In a preferred embodiment, the driving element is a pneumatic cylinder, an oil cylinder or a motor.

[0019] In a preferred embodiment, a flexible sealing layer is provided on the peripheral side of the furnace door, and the flexible sealing layer is provided between the furnace body and the furnace door.

[0020] In summary, the utility model has the following technical effects: the utility model can effectively isolate different temperature zones on the production line, ensure the temperature stability in each temperature zone, and at the same time realize multi-channel parallel control to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the external structure of the utility model from a first perspective;

[0022] Figure 2 A second perspective schematic diagram of the external structure of the utility model;

[0023] Figure 3 For this utility model Figure 2A partial cutaway diagram of

[0024] Figure 4 It is a structural schematic diagram of the driving mechanism of the utility model;

[0025] Figure 5 For this utility model Figure 3 Schematic diagram of the local structure;

[0026] Figure 6 For this utility model Figure 3 Schematic diagram of the local structure;

[0027] Figure 7 For this utility model Figure 3 Schematic diagram of the local structure;

[0028] Figure 8 For this utility model Figure 1 Schematic diagram of the internal structure;

[0029] Fig. 9 For this utility model Figure 8 Schematic diagram of the local structure;

[0030] Fig.10 For this utility model Figure 8 Schematic diagram of the local structure;

[0031] Fig.11 For this utility model Figure 8 Schematic diagram of the local structure;

[0032] Fig.12 It is a schematic diagram of the use state of the utility model.

[0033] The meanings of the reference numerals are as follows:

[0034] 10. Furnace door, 101. Door panel, 102. First connecting shaft, 103. Second connecting shaft, 104. Spacer, 20. Channel, 30. Furnace body, 40. Driving mechanism, 41. Driving element, 42. Pull rod, 43. Rocker arm, 44. Rotating shaft, 50. First bearing, 60. Second bearing, 70. Door lintel, 80. Door socket, 90. Door step, 100. Articulated seat, 110. Expansion gap, 120. Locking nut, 130. Third bearing, 140. Bearing seat. DETAILED DESCRIPTION

[0035] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] See also Figure 1-Figure 12 The utility model discloses a multi-channel rotating furnace door device, comprising: a furnace door 10, the furnace door 10 is arranged on a channel 20, a plurality of channels 20 are arranged on a furnace body 30, each channel 20 is correspondingly provided with at least one furnace door 10, the furnace door 10 is rotatably connected to the furnace body 30, and the furnace door 10 opens and closes the channel 20 by rotating; a driving mechanism 40, the driving mechanism 40 is arranged on the furnace body 30, and the driving mechanism 40 drives the furnace door 10 to rotate.

[0039] It can be understood that when multiple temperature intervals are set on the channel 20, multiple furnace doors 10 can be set accordingly, and the number of furnace doors 10 is determined according to the number of temperature intervals set on the channel 20; each furnace door 10 can be individually provided with a corresponding driving mechanism 40, and multiple furnace doors 10 can also be driven simultaneously by one driving mechanism 40.

[0040] See also Figure 1-Figure 4 , one driving mechanism 40 drives multiple furnace doors 10 to rotate at the same time, so as to realize the simultaneous parallel control of multiple channels 20. In other embodiments, each furnace door 10 may be individually provided with a driving mechanism 40.

[0041] Specifically, the width of the furnace door 10 is set corresponding to the width of the channel 20, and the height of the furnace door 10 is set corresponding to the height of the channel 20. The width and height of the channel 20 are based on the ability to simultaneously achieve the rotation of the furnace door 10 and the sealing of the channel 20.

[0042] Specifically, the channel 20 is a conveying channel of a glass deep processing production line, and a conveying mechanism such as a conveying trolley or a conveying roller is used to load the glass, and the conveying mechanism such as a conveying trolley or a conveying roller runs on the conveying channel.

[0043] Based on the above structure, the utility model can effectively isolate different temperature zones on the production line, ensure the temperature stability in each temperature zone, and simultaneously realize the parallel control of multiple channels 20 to improve production efficiency.

[0044] In the utility model, the furnace door 10 includes a door panel 101, a first connecting shaft 102 and a second connecting shaft 103. The first connecting shaft 102 is arranged at the upper part of the door panel 101, and the second connecting shaft 103 is arranged at the lower part of the door panel 101. The first connecting shaft 102 is rotatably connected to the furnace body 30 through a first bearing 50, and the second connecting shaft 103 is rotatably connected to the furnace body 30 through a second bearing 60.

[0045] Based on the above structure, the upper part of the furnace door 10 is supported and rotated by the first bearing 50, and the lower part of the furnace door 10 is supported and rotated by the second bearing 60, which is conducive to the smooth rotation of the furnace door 10, and is particularly suitable for the furnace door 10 with a larger weight on the production line.

[0046] See also Figure 6-Figure 8 , Figure 10-11 In the utility model, the furnace body 30 is provided with a lintel 70 and a door socket 80 at the upper part of the passage 20, the door socket 80 is arranged on the lintel 70, and the first bearing 50 is arranged in the inner cavity of the door socket 80; the furnace body 30 is provided with a door step 90 and a hinge seat 100 at the lower part of the passage 20, the hinge seat 100 is arranged on the door step 90, and the second bearing 60 is arranged in the inner cavity of the hinge seat 100.

[0047] It is understandable that the door socket 80 and the hinge seat 100 are both internally hollow structures, so that the door socket 80 can accommodate the first bearing 50 and the first connecting shaft 102, and the hinge seat 100 can accommodate the second bearing 60 and the second connecting shaft 103.

[0048] Specifically, the lintel 70 and the door socket 80 are both detachably connected or fixedly connected to the furnace body 30, and the lintel 70 and the door socket 80 are both detachably connected to the furnace body 30 by screws, and the lintel 70 and the door socket 80 are both fixedly connected to the furnace body 30 by welding, and the lintel 70, the door socket 80 and the furnace body 30 are in a stationary state relative to the furnace door 10; the door step 90 and the hinge seat 100 are both detachably connected or fixedly connected to the furnace body 30, and the door step 90 and the hinge seat 100 are both detachably connected to the furnace body 30 by screws, and the door step 90 and the hinge seat 100 are both fixedly connected to the furnace body 30 by welding, and the door step 90, the hinge seat 100 and the furnace body 30 are in a stationary state relative to the furnace door 10.

[0049] Specifically, the first bearing 50 and the second bearing 60 are both ball bearings, and the first bearing 50 and the second bearing 60 both include a fixing part, a ball and a rotating part.

[0050] Specifically, the fixing part of the first bearing 50 is fixedly connected to the door socket 80, and the fixing part of the first bearing 50 and the door socket 80 can be fixedly connected by a tight fit or welding; the rotating part of the first bearing 50 is fixedly connected to the first connecting shaft 102, and the rotating part of the first bearing 50 and the first connecting shaft 102 can be fixedly connected by a tight fit or welding, and further relative rotation between the first connecting shaft 102 and the door socket 80 can be achieved.

[0051] Specifically, the fixing part of the second bearing 60 is fixedly connected to the articulated seat 100, and the fixing part of the second bearing 60 and the articulated seat 100 can be fixedly connected by a tight fit or welding; the rotating part of the second bearing 60 is fixedly connected to the second connecting shaft 103, and the rotating part of the second bearing 60 and the second connecting shaft 103 can be fixedly connected by a tight fit or welding, and further relative rotation between the second connecting shaft 103 and the articulated seat 100 can be achieved.

[0052] See also Figure 7 as well as Fig.11 In the present invention, the furnace door 10 includes a spacer sleeve 104 , which is arranged at the bottom of the door panel 101 and sleeved on the outside of the hinge seat 100 .

[0053] Specifically, the inner diameter of the spacer 104 matches the outer diameter of the hinge seat 100, and the inner diameter of the spacer 104 is equal to or nearly equal to the outer diameter of the hinge seat 100. Due to the limiting effect of the spacer 104, when the door panel 101 expands downward due to high temperature, the spacer 104 can ensure the axial straightness of the door panel 101.

[0054] Specifically, the door panel 101, the first connecting shaft 102, the second connecting shaft 103 and the spacer 104 are integrally formed, or the door panel 101, the first connecting shaft 102, the second connecting shaft 103 and the spacer 104 are separately made, and the door panel 101, the first connecting shaft 102, the second connecting shaft 103 and the spacer 104 are detachably connected by screws or fixed together by welding.

[0055] See also Figure 7 as well as Fig.11 In the present invention, an expansion gap 110 is provided between the second connecting shaft 103 and the door step 90 , and the expansion gap 110 is located in the axial direction of the second connecting shaft 103 and the door step 90 .

[0056] Specifically, an expansion gap 110 is provided between the end of the second connecting shaft 103 and the door step 90. The expansion gap 110 can meet the expansion requirement of the furnace door 10 itself under high temperature conditions, and the size of the expansion gap 110 is based on the requirement of accommodating the expansion and deformation of the furnace door 10 itself. If the expansion gap 110 is not provided, the furnace door 10 expands under high temperature conditions, and the second connecting shaft 103 will squeeze the door step 90. The second connecting shaft 103 and the door step 90 interfere with each other, affecting the normal rotation of the furnace door 10, and further affecting the opening and closing of the furnace door 10. Moreover, the second connecting shaft 103 even squeezes the spacer sleeve 104 and the hinge seat 100, causing the spacer sleeve 104 and the hinge seat 100 to deform or even rupture and damage, thereby affecting the service life of the parts.

[0057] In the present invention, the first bearing 50 is connected to the lower part of the first connecting shaft 102 , and a locking nut 120 is provided in the middle part of the first connecting shaft 102 , and the locking nut 120 limits the axial position of the first bearing 50 ; the upper part of the first connecting shaft 102 is connected to the rotating shaft 44 .

[0058] Specifically, the first connecting shaft 102 is a stepped shaft, and an installation step is provided on the door socket 80; the lower part of the first connecting shaft 102 is a smooth axis, the middle part of the first connecting shaft 102 is a threaded shaft, and the locking nut 120 is threadedly connected to the middle part of the first connecting shaft 102; the fixing part of the first bearing 50 abuts on the door socket 80, and the locking nut 120 abuts on the rotating part of the first bearing 50, and the locking nut 120 realizes the axial positioning of the first bearing 50, thereby preventing the first bearing 50 from moving up and down during the rotation of the furnace door 10, thereby improving the stability of the overall structure; the locking nut 120, the first connecting shaft 102, and the first bearing 50 cooperate with each other to allow the furnace door 10 to be suspended on the door socket 80.

[0059] See also Figure 4 In the present invention, the driving mechanism 40 includes a driving element 41, a pull rod 42, a plurality of swing rods 43 and a plurality of rotating shafts 44, and the swing rods 43 and the rotating shafts 44 are arranged one by one with the furnace doors 10; one end of the driving element 41 is rotatably connected to the furnace body 30, the other end of the driving element 41 is rotatably connected to one end of the pull rod 42, the other end of the pull rod 42 is rotatably connected to one end of the swing rod 43, and the other end of the swing rod 43 is fixedly connected to the rotating shaft 44. In this way, one driving mechanism 40 drives multiple furnace doors 10 to rotate at the same time, realizing simultaneous parallel control of multiple channels 20.

[0060] Specifically, the driving element 41 , the pull rod 42 and the plurality of rocker arms 43 are all disposed on the top of the furnace body 30 , and the plurality of rotating shafts 44 are all penetrated inside the furnace body 30 , and the rotating shafts 44 are used to transfer the torque from the driving element 41 to the furnace door 10 .

[0061] In this way, the above structure can avoid setting the driving mechanism 40 inside the channel 20, and avoid the driving mechanism 40 occupying the internal space of the channel 20. The setting of the driving mechanism 40 does not affect the rotation of the furnace door 10, nor does it affect the sealing between the furnace door 10 and the furnace body 30; and the pull rod 42, the rocker arm 43 and the rotating shaft 44 are used to transmit the torque, and there is no need to set the driving element 41 inside the furnace body 30 or inside the channel 20. The driving element 41 can be set at a position away from the channel 20 to avoid the driving element 41 being affected by high temperature conditions. The simultaneous parallel control of multiple channels 20 can also reduce the number of driving elements 41, extend the service life of the driving element 41, reduce the maintenance frequency of the driving mechanism 40, and improve safety. The utility model is particularly suitable for use in high temperature conditions.

[0062] Specifically, a plurality of swing rods 43 are arranged at intervals on the pull rod 42 , the plurality of swing rods 43 are arranged parallel to each other, and the arrangement gaps between the plurality of swing rods 43 are based on the arrangement gaps between the furnace doors 10 .

[0063] Specifically, one end of the driving element 41 is rotatably connected to the furnace body 30 through a rotating pin, the other end of the driving element 41 is rotatably connected to one end of the pull rod 42 through a rotating pin, and the other end of the pull rod 42 is rotatably connected to one end of the swing rod 43 through a rotating pin.

[0064] In the utility model, one end of the rotating shaft 44 is fixedly connected to the rocker arm 43, and the other end of the rotating shaft 44 is fixedly connected to the furnace door 10; the rotating shaft 44 is rotatably connected to the furnace body 30 through the third bearing 130, and a bearing seat 140 is provided on the furnace body 30, and the third bearing 130 is arranged in the inner cavity of the bearing seat 140.

[0065] It can be understood that the bearing seat 140 is an internal hollow structure.

[0066] Specifically, the rotating shaft 44 and the rocker arm 43 are fixedly connected by tight fit or welding, and the rotating shaft 44 and the first connecting shaft 102 of the furnace door 10 are fixedly connected by tight fit or welding.

[0067] Specifically, the rocker arm 43 is provided with a mounting hole that cooperates with the rotating shaft 44, the rotating shaft 44 is provided with a mounting hole that cooperates with the first connecting shaft 102, or the first connecting shaft 102 is provided with a mounting hole that cooperates with the rotating shaft 44, and the mounting hole is a hexagonal hole or a square hole, and the shape of the mounting hole is based on the ability to achieve a tight fit to transmit torque.

[0068] Specifically, the third bearings 130 are all ball bearings, and the third bearings 130 include a fixed part, a ball, and a rotating part. The fixed part of the third bearing 130 is fixedly connected to the bearing seat 140, and the fixed part of the third bearing 130 and the bearing seat 140 can be fixedly connected by tight fit or welding; the rotating part of the third bearing 130 is fixedly connected to the rotating shaft 44, and the rotating part of the third bearing 130 and the rotating shaft 44 can be fixedly connected by tight fit or welding. In this way, the third bearing 130 can facilitate the rotation of the rotating shaft 44 relative to the furnace body 30, and effectively avoid the rotating shaft 44 from getting stuck during the rotation process, which affects the rotation and opening and closing of the furnace door 10.

[0069] The first bearing 50 , the second bearing 60 and the third bearing 130 are all high temperature resistant bearings, ensuring that the first bearing 50 , the second bearing 60 and the third bearing 130 can work normally under high temperature conditions.

[0070] In the present invention, the driving element 41 is an air cylinder, an oil cylinder or a motor.

[0071] See also Figure 1-Figure 4 The driving element 41 used in the embodiment of the utility model is a cylinder.

[0072] In the present invention, a flexible sealing layer is provided on the peripheral side of the furnace door 10 , and the flexible sealing layer is provided between the furnace body 30 and the furnace door 10 , so as to improve the sealing performance of each temperature range.

[0073] Specifically, the flexible sealing layer is a high temperature resistant flexible sealing layer. For example, the flexible sealing layer can be a high temperature resistant rubber layer or a high temperature resistant plastic layer.

[0074] The specific working process of the utility model is as follows:

[0075] See also Figure 2-Figure 3 , at this time, the furnace door 10 and the driving mechanism 40 are in the initial state, and the furnace door 10 is closed;

[0076] The output shaft of the driving element 41 extends out, driving the pull rod 42 forward, thereby driving the multiple swing rods 43 to rotate clockwise, and the swing rods 43 transmit the torque to the corresponding rotating shaft 44 and the furnace door 10, thereby driving the corresponding furnace door 10 to rotate clockwise, so that the two temperature ranges on both sides of the furnace door 10 are interconnected, and the furnace door 10 opens the channel 20. When the furnace door 10 and the channel 20 are parallel or nearly parallel to each other, the opening angle of the furnace door 10 is the largest; the rotation angle of the furnace door 10 is controlled by controlling the extension degree of the output shaft of the driving element 41, thereby controlling the opening degree of the channel 20;

[0077] The output shaft of the driving element 41 is retracted, driving the pull rod 42 to retreat, thereby driving the multiple rocker arms 43 to rotate counterclockwise. The rocker arms 43 transmit the torque to the corresponding rotating shaft 44 and the furnace door 10, thereby driving the corresponding furnace door 10 to rotate counterclockwise. When the furnace door 10 and the channel 20 are perpendicular to each other, the two temperature ranges on both sides of the furnace door 10 are isolated, and the furnace door 10 closes the channel 20.

[0078] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A multi-channel rotary furnace door device, characterized in that: include: A furnace door, wherein the furnace door is arranged on the channel, a plurality of the channels are arranged on the furnace body, each channel is correspondingly provided with at least one furnace door, the furnace door is rotatably connected to the furnace body, and the furnace door opens and closes the channel by rotating; A driving mechanism is arranged on the furnace body, and the driving mechanism drives the furnace door to rotate.

2. The multi-channel rotary furnace door device according to claim 1, characterized in that: The furnace door includes a door panel, a first connecting shaft and a second connecting shaft, the first connecting shaft is arranged at the upper part of the door panel, the second connecting shaft is arranged at the lower part of the door panel, the first connecting shaft is rotatably connected to the furnace body through a first bearing, and the second connecting shaft is rotatably connected to the furnace body through a second bearing.

3. The multi-channel rotary furnace door device according to claim 2, characterized in that: The furnace body is provided with a door lintel and a door socket at the upper part of the passage, the door socket is provided on the door lintel, and the first bearing is provided in the inner cavity of the door socket; The furnace body is provided with a door step and a hinge seat at the lower part of the passage, the hinge seat is arranged on the door step, and the second bearing is arranged in the inner cavity of the hinge seat.

4. The multi-channel rotary furnace door device according to claim 3, characterized in that: The furnace door comprises a spacer sleeve, which is arranged at the bottom of the door panel and sleeved on the outside of the hinge seat.

5. The multi-channel rotary furnace door device according to claim 3, characterized in that: An expansion gap is provided between the second connecting shaft and the door step, and the expansion gap is located in the axial direction of the second connecting shaft and the door step.

6. The multi-channel rotary furnace door device according to claim 3, characterized in that: The first bearing is connected to the lower portion of the first connecting shaft, and a locking nut is disposed in the middle portion of the first connecting shaft, and the locking nut limits the axial position of the first bearing.

7. The multi-channel rotary furnace door device according to claim 1, characterized in that: The driving mechanism includes a driving element, a pull rod, a plurality of swing rods and a plurality of rotating shafts, and the swing rods and the rotating shafts are arranged in a one-to-one correspondence with the furnace doors; One end of the driving element is rotatably connected to the furnace body, the other end of the driving element is rotatably connected to one end of the pull rod, the other end of the pull rod is rotatably connected to one end of the swing rod, and the other end of the swing rod is fixedly connected to the rotating shaft.

8. The multi-channel rotary furnace door device according to claim 7, characterized in that: One end of the rotating shaft is fixedly connected to the swing rod, and the other end of the rotating shaft is fixedly connected to the furnace door; The rotating shaft is rotatably connected to the furnace body via a third bearing. A bearing seat is provided on the furnace body, and the third bearing is provided in an inner cavity of the bearing seat.

9. The multi-channel rotary furnace door device according to claim 7, characterized in that: The driving element is an air cylinder, an oil cylinder or a motor.

10. The multi-channel rotary furnace door device according to claim 1, characterized in that: A flexible sealing layer is arranged on the peripheral side of the furnace door, and the flexible sealing layer is arranged between the furnace body and the furnace door.

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