Sealing structure and heating furnace

Abstract

The sealing structure comprises a shell, a sealing assembly and a driving assembly, a flue gas channel is formed in the shell, and the driving assembly is connected with the sealing assembly and used for adjusting the opening degree of the flue gas channel; the sealing assembly comprises a baffle fixedly arranged on the inner wall of the flue gas channel in the circumferential direction, and a sealing assembly arranged on the inner wall of the flue gas channel, the support is arranged in the middle of the flue gas channel, and the two ends of the support are connected with the baffles; the blades are arranged on the inner side of the baffle, the two blades are hinged to the two sides of the support respectively, and the driving assembly is used for being connected with the blades and driving the blades to rotate around the support so that the blades can have a first state in which the blades can be separated from the baffle and a second state in which the blades can be attached to the baffle. Compared with the prior art, the sealing structure and the heating furnace are simple in structure and good in sealing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating furnace, more particularly, to a sealing structure and a heating furnace. BACKGROUND

[0002] The smoke passage baffle is a baffle door for adjusting flow in a chimney or a smoke passage in the petroleum, chemical, electric power, metallurgical and other industries. By changing the opening degree of the baffle, the oxygen content, negative pressure and flow of the smoke in the furnace can be controlled to avoid shutdown accidents caused by the extinguishing of the heating furnace. With the trend of waste heat recovery, hot smoke needs to be passed through a heat exchanger before being discharged into the atmosphere, at which time the smoke passage baffle needs to be completely closed, and the hot smoke in the heating furnace is drawn into the heat exchanger by the induced draft fan to replace heat, so as to achieve the purpose of energy recycling. If the smoke passage baffle leaks, cold air or low-temperature smoke after replacement will be drawn back into the heat exchanger, resulting in a decrease in heat exchange efficiency and energy waste.

[0003] Due to the very harsh working environment of the smoke passage baffle, in order to ensure the flexible rotation of the baffle, the current design and manufacturing specifications generally allow a certain amount of leakage of the smoke passage baffle, and a gap of a certain size is usually left between the end of the sealing ring plate and the baffle shaft and between the baffle and the inner wall of the baffle shell. Due to the gap, the sealing effect of the current smoke passage baffle is not good.

[0004] Therefore, there is an urgent need for a sealing structure and a heating furnace with simple structure and good sealing performance. Inventive Content

[0005] To solve the above technical problems, the present application provides a sealing structure and a heating furnace with simple structure and good sealing performance.

[0006] The technical scheme provided by the present application is as follows:

[0007] A sealing structure, comprising a shell, a sealing assembly and a driving assembly, a smoke passage is formed in the shell, the driving assembly is connected with the sealing assembly, and is used for adjusting the opening degree of the smoke passage;

[0008] Among them,

[0009] The sealing assembly comprises:

[0010] A baffle fixedly arranged in the circumferential direction of the inner wall of the smoke passage;

[0011] A support arranged in the middle of the smoke passage, two ends of the support being connected with the baffle;

[0012] A plurality of blades are arranged on the inner side of the baffle, two of the blades are respectively hinged to two sides of the support, and the driving assembly is used to be connected with the blades to drive the blades to rotate around the support, so that the blades have a first state of being separated from the baffle and a second state of being attached to the baffle.

[0013] Preferably, the sealing assembly further comprises:

[0014] Two rotating shafts are arranged in parallel and are rotatably connected to the housing at two ends of the rotating shafts.

[0015] A connecting rod group is arranged between the rotating shafts and the blades, the connecting rod group comprises a connecting rod and a fixed rod, two ends of the connecting rod are respectively hinged to a blade and the fixed rod, and one end of the fixed rod away from the connecting rod is fixedly connected to the rotating shaft.

[0016] The driving assembly is connected with the rotating shafts to drive the two rotating shafts to synchronously rotate in opposite directions.

[0017] Preferably, the driving assembly comprises:

[0018] A first gear is arranged on the first rotating shaft.

[0019] A second gear is arranged on the second rotating shaft, and the first gear and the second gear are externally meshed.

[0020] A driving member, an output shaft of the driving member is connected with the first rotating shaft to drive the first rotating shaft to rotate.

[0021] Preferably, the flue gas passage is circular, and the baffle is a circular ring structure.

[0022] Preferably, the flue gas passage is arranged at least twice, a separation plate is arranged between adjacent flue gas passages, the sealing assembly is arranged one-to-one with the flue gas passage, the driving member is connected with the first rotating shaft of the first sealing assembly, and two sealing assemblies are connected through a connecting mechanism.

[0023] Preferably, the connecting mechanism comprises:

[0024] A first connecting rod is fixedly connected with the first rotating shaft of the first sealing assembly.

[0025] A second connecting rod is hinged to one end of the first connecting rod away from the first sealing assembly.

[0026] A third connecting rod is hinged to one end of the second connecting rod away from the first connecting rod, and one end of the third connecting rod away from the second connecting rod is fixedly connected with the first rotating shaft of the second sealing assembly.

[0027] Preferably, the sealing assembly further comprises:

[0028] A sealing groove arranged on the baffle plate;

[0029] A sealing member arranged in the sealing groove, the height of the sealing member being greater than the depth of the sealing groove.

[0030] Preferably, the length of the connecting rod is greater than the length of the fixed rod, and the connecting rod and the fixed rod are hingedly connected through a pin.

[0031] Preferably, the first connecting rod is a telescopic connecting rod.

[0032] A heating furnace, characterized in comprising the sealing structure according to any one of the preceding aspects.

[0033] The sealing structure provided in the embodiment of the utility model firstly, because setting up the shell, the sealing assembly and the drive assembly, wherein, the flue gas passage is used for the flue gas circulation, the sealing assembly is used in coordination with the flue gas passage, the drive assembly is connected with the sealing assembly, and the opening size of the flue gas passage is adjusted.Secondly, the sealing assembly includes the baffle plate, the support and the blade, wherein, the baffle plate is fixedly arranged on the circumference of the inner wall of the flue gas passage, the support is arranged in the middle of the flue gas passage, the both ends of the support are connected with the baffle plate respectively, the blade is arranged on the inner side of the baffle plate, the blade is provided with two, and the both sides of the support are hingedly connected with the two blades respectively, the drive assembly is used to drive the blade to rotate around the support, so that the blade has the first state and the second state, when the blade is in the first state, the outer surface of the blade is separated from the baffle plate, and the opening size of the flue gas passage can be adjusted by adjusting the angle of the blade, when the blade is in the second state, the outer surface of the blade is attached to the baffle plate, so that the sealing effect is achieved.The sealing of the flue gas passage is realized by the attachment between the outer surface of the blade and the baffle plate, when the blade is in the second state, there is no gap between the end surface of the blade and the inner wall of the flue gas passage, and the leakage of flue gas is reduced.When the flue gas passage needs to be opened, the drive assembly drives the blade to rotate around the support in the shell and away from the baffle plate, so that the size of the flue gas passage is adjusted, and the structure is simpler.It can be seen that, compared with the prior art, the sealing structure in the embodiment of the utility model has simple structure and better sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0035] Figure 1A structure schematic view of the sealing structure provided by the embodiment of the utility model;

[0036] Figure 2 A structure schematic view of another view of the sealing structure provided by the embodiment of the utility model;

[0037] Figure 3 A sectional view of the sealing structure provided by the embodiment of the utility model;

[0038] Figure 4 A structure schematic view of the first fixed rod provided by the embodiment of the utility model;

[0039] Figure 5 Another structure schematic view of the sealing structure provided by the embodiment of the utility model;

[0040] Figure 6 A partial enlarged view of Figure 5 ;

[0041] Figure 7 A sectional view of the sealing structure provided by the embodiment of the utility model;

[0042] Figure 8 A partial enlarged view of Figure 7 A.

[0043] The drawing mark: 1, the shell, 2, the sealing assembly, 3, the drive assembly, 4, the flue gas passage, 5, the separation plate, 7, the barrel, 8, the flange, 9, the reinforcing plate, 21, the baffle, 22, the support, 23, the blade, 24, the rotating shaft, 251, the connecting rod, 252, the fixed rod, 31, the first gear, 32, the second gear, 33, the driving part, 61, the first connecting rod, 62, the second connecting rod, 63, the third connecting rod, 26, the sealing groove, 27, the sealing element, 2511, the first rod, 2512, the second rod, 2513, the joint. DETAILED DESCRIPTION

[0044] In order to make the person skilled in the art better understand the technical scheme in the present application, the technical scheme in the embodiment of the present application will be described clearly and completely below, obviously, the described embodiment is only a part of the embodiment of the present application, not all the embodiment. Based on the embodiment in the present application, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the present application.

[0045] It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0048] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0049] The embodiments of the present invention are written in a progressive manner.

[0050] like Figures 1 to 8 As shown, an embodiment of the present invention provides a sealing structure, including a shell 1, a sealing assembly 2 and a driving assembly 3. A smoke channel 4 is opened in the shell 1, and the driving assembly 3 is connected to the sealing assembly 2 for adjusting the opening of the smoke channel 4; wherein the sealing assembly 2 includes: a circumferential baffle 21 fixedly arranged on the inner wall of the smoke channel 4; a bracket 22 arranged in the middle of the smoke channel 4, and both ends of the bracket 22 are connected to the baffle 21; blades 23 arranged on the inner side of the baffle 21, and the two blades 23 are hinged to the two sides of the bracket 22 respectively, and the driving assembly 3 is used to be connected to the blades 23 to drive the blades 23 to rotate around the bracket 22, so that the outer surface of the blade 23 has a first state separated from the inner surface of the baffle 21 and a second state fitted with the inner surface of the baffle 21.

[0051] The outer circumferential surface of the flue gas passage baffle plate and the inner wall of the shell 1 are usually left with a gap of a certain size in the prior art, and the sealing effect of the current flue gas passage baffle plate is not good due to the existence of the gap.

[0052] It should be noted that the inner side in the embodiment of the utility model refers to the side of the flue gas passage away from the flue gas outlet, the baffle plate 21 is arranged at the end of the flue gas passage close to the flue gas outlet, the vane 23 is arranged in the flue gas passage,

[0053] In order to solve the above technical problems, the sealing structure provided by the embodiment of the utility model firstly, because the shell 1, the sealing assembly 2 and the driving assembly 3 are arranged, wherein the flue gas passage 4 is arranged in the shell 1, the flue gas passage 4 is used for the flue gas flow, the sealing assembly 2 is used in cooperation with the flue gas passage 4, the driving assembly 3 is connected with the sealing assembly 2, and the opening size of the flue gas passage 4 is adjusted.Secondly, the sealing assembly 2 includes the baffle plate 21, the support 22 and the vane 23, wherein the baffle plate 21 is fixedly arranged in the circumferential direction of the inner wall of the flue gas passage 4, the support 22 is arranged in the middle of the flue gas passage 4, the two ends of the support 22 are connected with the baffle plate 21 respectively, the vane 23 is arranged on the inner side of the baffle plate 21, the vane 23 is provided with two, and the two vanes 23 are hinged with the two sides of the support 22 respectively, the driving assembly 3 is used to drive the vane 23 to rotate around the support 22, so that the vane 23 has a first state and a second state, when the vane 23 is in the first state, the outer surface of the vane 23 is separated from the baffle plate 21, the opening size of the flue gas passage 4 can be adjusted by adjusting the angle of the vane 23, when the vane 23 is in the second state, the outer surface of the vane 23 is attached to the baffle plate 21, so that the sealing effect is achieved. The sealing of the flue gas passage 4 is realized by the attachment between the outer surface of the vane 23 and the baffle plate 21, when the vane 23 is in the second state, there is no gap between the end surface of the vane 23 and the inner wall of the flue gas passage 4, and the leakage of flue gas is reduced. When the flue gas passage 4 needs to be opened, the driving assembly 3 drives the vane 23 to rotate around the support 22 in the shell 1 away from the baffle plate 21, so as to adjust the size of the flue gas passage 4, and the structure is simpler. Therefore, compared with the prior art, the sealing structure in the embodiment of the utility model has simple structure and better sealing performance.

[0054] In the above structure, as one of the embodiments, the baffle 21 in the embodiment of the utility model is arranged in the circumferential direction of the inner wall of the flue gas passage 4, the baffle 21 is specifically annular structure, the outer diameter of the blade 23 is greater than the inner diameter of the baffle 21, and the outer diameter of the blade 23 is less than the inner diameter of the shell 1. The baffle 21 is arranged on the inner wall of the flue gas passage 4, when the blade 23 is in the second state, the outer surface of the blade 23 is attached to the inner surface of the baffle 21, compared with the prior art, the sealing effect is better. In order to facilitate the adjustment of the opening of the blade 23, the outer diameter of the blade 23 is greater than the inner diameter of the baffle 21, and less than the inner diameter of the shell 1, so that the blade 23 can meet the sealing of the outlet of the flue gas passage 4, and the inner wall of the flue gas passage 4 does not interfere with the rotation angle of the blade 23.

[0055] In the above structure, as one of the preferred embodiments, the driving assembly 3 in the embodiment of the utility model is used to drive two blades 23 to rotate synchronously.

[0056] Further, as one of the embodiments, the driving assembly 3 in the embodiment of the utility model can be directly connected with the blade 23, and the blade 23 is directly driven to rotate by the driving assembly 3, and the first state and the second state are switched.

[0057] In the above structure, the driving assembly 3 can be any one of a motor, a pneumatic driving piece and a hydraulic driving piece.

[0058] As one of the specific embodiments, the driving mechanism in the embodiment of the utility model is used to synchronously drive two blades 23 to rotate around the support rod, as one of the embodiments, the driving mechanism includes a driver and a control valve, the driver has a telescopic rod and a driving part, the driving part is used to drive the telescopic rod to stretch and retract in the axial direction, the telescopic rod is used for connecting the blade 23, and the blade 23 is driven to rotate around the support rod through the telescopic rod, wherein the telescopic rod is provided with two, and is symmetrically arranged on both sides of the support rod.

[0059] Specifically, the telescopic rod is specifically a hydraulic rod or a pneumatic rod, two hydraulic rods or two pneumatic rods are connected in parallel, and the synchronous control of the two telescopic rods is ensured through the control valve.

[0060] The utility model discloses an embodiment provides a kind of concrete implementation, the driving assembly 3 between the blade 23 in the embodiment of the utility model can also be transmission connection, specifically, the sealing assembly 2 in the embodiment of the utility model further includes pivot 24 and connecting rod group, wherein, pivot 24 is rotatably connected between both ends and shell 1, pivot 24 is provided with two, and two pivot 24 are parallelly arranged, connecting rod group is arranged between pivot 24 and blade 23, connecting rod group includes connecting rod 251 and fixed rod 252, both ends of connecting rod 251 are respectively hinged with blade 23 and fixed rod 252, and the end of fixed rod 252 away from connecting rod 251 is fixedly connected with pivot 24, driving assembly 3 is used to be connected with pivot 24, for driving two pivot 24 synchronous rotation towards opposite direction.

[0061] Driving assembly 3 drives pivot 24 to rotate, and pivot 24 drives fixed rod 252 and connecting rod 251 to rotate, so that blade 23 rotates around the hinged side of support 22.

[0062] In the above structure, as one of the specific implementation, the driving assembly 3 in the embodiment of the utility model includes driving element, the output shaft of driving element is connected with pivot 24, and driving element is correspondingly arranged with pivot 24, driving element drives pivot 24 to rotate by synchronous driving, so that two pivot 24 in the same group of sealing assembly 2 rotate synchronously in opposite directions. Specifically, more further, the driving assembly 3 here includes two parallel positive and negative rotation motors and switch, and the positive and negative rotation motor can make the pivot rotate in positive and negative directions, when the two positive and negative rotation motors are powered for the first time, the first positive and negative rotation motor drives the first pivot to rotate around the first direction, at the same time, the second positive and negative rotation motor drives the second pivot to rotate around the second direction, when the two positive and negative rotation motors are powered for the second time, the first positive and negative rotation motor drives the first pivot to rotate around the second direction, at the same time, the second positive and negative rotation motor drives the second pivot to rotate around the first direction, so as to realize the opening and closing of blade 23.

[0063] As one of the more preferred implementation, the driving assembly 3 in the embodiment of the utility model includes first gear 31, second gear 32 and driving piece 33, first gear 31 is fixedly sleeved on the first pivot, second gear 32 is fixedly sleeved on the second pivot, and first gear 31 and second gear 32 are specifically externally meshed, the output shaft of driving piece 33 is connected with the first pivot, and driving piece 33 is used to drive the first pivot to rotate. By driving piece 33 driving the first pivot to rotate, drive the first gear 31 to rotate, by the external meshing between first gear 31 and second gear 32, so as to drive the second pivot to rotate in opposite directions.

[0064] More further, as one of the preferred implementation, the first gear 31, the second gear 32 and the driving piece 33 in the embodiment of the utility model are all arranged on the outside of shell 1, which is convenient for maintenance.

[0065] Further, the two ends of the first rotating shaft and the shell 1 are connected by bearings, and the two ends of the second rotating shaft and the shell 1 are also connected by bearings.

[0066] In the above structure, as one of the specific embodiments, the flue gas passage 4 is provided with one, as shown in the figure, the cross section of the flue gas passage 4 in the embodiment of the utility model is circular, and the blade 23 is specifically a semicircular structure. Figures 1 to 3

[0067] Specifically, the two blades 23 are arranged on the two sides of the supporting rod respectively, and the inner side of the blade 23 and the supporting rod are connected by a hinge, and the outer side of the blade 23 is used in cooperation with the baffle 21; when the blade 23 is in the first state, there is a gap between the blade 23 and the baffle 21, and the opening size between the blade 23 and the baffle 21 is adjusted by adjusting the rotation angle of the blade 23; when the blade 23 is in the second state, the outer surface of the blade 23 is attached to the inner surface of the baffle 21, and the flue gas passage 4 is sealed.

[0068] Further, the driving member 33 is specifically a pneumatic driving member, wherein the pneumatic driving member is used to drive the first rotating shaft to rotate, and the starting, stopping and reversing of the pneumatic driving member can be controlled by an electrical element, which is more convenient.

[0069] Further, the driving member 33 can be a driving handle, and the driving handle drives the first rotating shaft to rotate.

[0070] Further, the driving member 33 includes a pneumatic driving member and a driving handle, and the first rotating shaft can be driven to rotate by driving the driving member or by driving the handle.

[0071] Further, when the size of the shell 1 is large, if only one flue gas passage 4 is provided, the size of the blade 23 to be arranged needs to be large, and the opening of the blade 23 cannot be adjusted.

[0072] In view of the above problems, the utility model provides an optimal embodiment, please refer to Figures 5 to 8 As shown in the figure, the flue gas passage 4 in the embodiment of the utility model is provided with at least two, and a separation plate 5 is arranged between adjacent flue gas passages 4, the sealing assembly 2 is arranged one by one corresponding to the flue gas passage 4, the driving member 33 is connected with the first rotating shaft of the first sealing assembly, and the sealing assemblies 2 are connected by a connecting mechanism.

[0073] The driving member 33 is connected with the first rotating shaft to provide power for the rotation of the first rotating shaft, the second rotating shaft is driven to rotate by the first rotating shaft, the sealing assemblies 2 are connected by the connecting mechanism, so that other sealing assemblies 2 are driven to seal, and thus the flue gas passage 4 can be opened and closed synchronously, which is more convenient.​

[0074] Further, as one of the embodiments, the connecting mechanism in the embodiment of the utility model includes first connecting rod 61, second connecting rod 62 and third connecting rod 63, wherein first connecting rod 61 is fixedly connected with the first rotating shaft of the first sealing assembly, second connecting rod 62 is hingedly connected with the end of first connecting rod 61 away from the first sealing assembly, third connecting rod 63 is hingedly connected with the end of second connecting rod 62 away from first connecting rod 61, and the end of third connecting rod 63 away from second connecting rod 62 is fixedly connected with the first rotating shaft of the second sealing assembly. The first rotating shaft of the first sealing assembly is driven to rotate by driving piece 33, and under the action of the connecting mechanism, the first rotating shaft of the second sealing mechanism is driven to rotate by the second rotating shaft of the first sealing assembly, so that linkage between the sealing assemblies is realized.

[0075] The number of sealing assemblies 2 can be set according to the size of the shell 1, and when multiple sets of sealing assemblies 2 are provided, the sealing assemblies 2 are sequentially connected through the connecting mechanism.

[0076] Preferably, the sealing assembly 2 is provided with 1 set, 2 sets or 3 sets.

[0077] Further, as one of the preferred embodiments, the sealing assembly 2 in the embodiment of the utility model further includes a sealing groove 26 and a sealing piece 27, wherein the sealing groove 26 is arranged on the baffle 21, the sealing piece 27 is arranged inside the sealing groove 26, the height of the sealing piece 27 is greater than the depth of the sealing groove 26, and when the blade 23 is in the second state of being attached to the baffle 21, the sealing piece 27 is deformed by the extrusion of the blade, thereby enhancing the sealing effect between the blade 23 and the baffle 21.

[0078] Further, as one of the specific embodiments, the sealing piece 27 in the embodiment of the utility model is made of polytetrafluoroethylene foaming material, which can be used for a long time in a high-temperature environment of 260 DEG C, is resistant to strong acid corrosion, has stable structure and is easy to maintain, repair and replace.

[0079] In the above structure, as one of the embodiments, the length of the connecting rod 251 is greater than the length of the fixed rod 252, and the connecting rod 251 and the fixed rod 252 are connected through a pin shaft.

[0080] Further, in order to avoid the machining error of the fixed rod 252 and the connecting rod 251, as one of the embodiments, the first connecting rod in the embodiment of the utility model is specifically a length-adjustable connecting rod.

[0081] Further, the second connecting rod in the embodiment of the utility model is specifically a length-fixed connecting rod.

[0082] More specifically, please refer to Figure 4As shown, the utility model embodiment provides a kind of structural schematic diagram of length telescopic connecting rod, first connecting rod includes first rod 2511, second rod 2512 and joint 2513, wherein, the one end of first rod 2511 is hinged with blade 23, the one end of first rod 2511 away from blade 23 is provided with first outer thread line, the one end of second rod 2512 is hinged with fixed rod 252, the one end of second rod 2512 away from fixed rod 252 is provided with second outer thread line, the rotation direction of first outer thread line and second outer thread line is opposite, the both ends of joint 2513 are provided with threaded hole, joint 2513 is arranged between first rod 2511 and second rod 2512, and joint 2513 is connected between first rod 2511 and second rod 2512 by screw thread, by rotating joint 2513, first rod 2511 and second rod 2512 are simultaneously moved to opposite direction, to adjust the length of first connecting rod.

[0083] In the above structure, as one of the embodiments, the sealing structure in the utility model embodiment further comprises a cylinder 7, the cylinder 7 is sleeved outside the shell 1, the two ends of the cylinder 7 are fixedly connected with the shell 1 through flanges 8, there are reinforcing plates 9 outside the cylinder 7, which are used for strengthening the strength of the cylinder 7, the reinforcing plates 9 are at least provided with two, and are arranged at intervals around the outer surface of the cylinder 7.

[0084] Specifically, the two ends of the reinforcing plate 9 are connected with the flange 8 respectively, and the inner side of the reinforcing plate 9 is connected with the cylinder 7.

[0085] The utility model further provides a heating furnace, which comprises the sealing structure of any one of the above, and since the sealing structure is arranged, the sealing effect is also good.

[0086] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A seal structure, characterized by, The sealing structure comprises a shell (1), a sealing assembly (2) and a driving assembly (3), the shell (1) is internally provided with a flue gas passage (4), the driving assembly (3) is connected with the sealing assembly (2) and used for adjusting the opening degree of the flue gas passage (4); Wherein, The sealing assembly (2) comprises: A baffle (21) fixedly arranged on the circumference of the inner wall of the flue gas passage (4); A support (22) arranged in the middle of the flue gas passage (4), both ends of the support (22) are connected with the baffle (21); Two blades (23) arranged on the inner side of the baffle (21), both of the blades (23) are hingedly connected with both sides of the support (22), the driving assembly (3) is connected with the blades (23) and drives the blades (23) to rotate around the support (22), so that the outer surface of the blades (23) has a first state of being separated from the inner surface of the baffle (21) and a second state of being attached to the inner surface of the baffle (21).

2. The sealing structure according to claim 1, wherein The sealing assembly (2) further comprises: Two rotating shafts (24) arranged in parallel, both ends of the rotating shafts are rotatably connected with the shell (1); A connecting rod set arranged between the rotating shafts (24) and the blades (23), the connecting rod set comprises a connecting rod (251) and a fixed rod (252), both ends of the connecting rod (251) are hingedly connected with the blades (23) and the fixed rod (252) respectively, one end of the fixed rod (252) away from the connecting rod (251) is fixedly connected with the rotating shaft (24); The driving assembly (3) is connected with the rotating shafts (24) and used for driving both of the rotating shafts (24) to synchronously rotate in opposite directions.

3. The sealing structure according to claim 2, wherein The driving assembly (3) comprises: A first gear (31) arranged on the first rotating shaft; A second gear (32) arranged on the second rotating shaft, the first gear (31) and the second gear (32) are externally meshed; A driving member (33), an output shaft of the driving member (33) is connected with the first rotating shaft and used for driving the first rotating shaft to rotate.

4. The sealing structure according to claim 3, wherein The flue gas passage (4) is circular, and the baffle (21) is a circular ring structure.

5. The sealing structure according to claim 3, wherein There are at least two flue gas passages (4), a separation plate (5) is arranged between adjacent flue gas passages (4), the sealing assemblies (2) are arranged in one-to-one correspondence with the flue gas passages (4), the driving member (33) is connected with the first rotating shaft of the first sealing assembly, and two sealing assemblies (2) are connected through a connecting mechanism.

6. The sealing structure according to claim 5, wherein The connecting mechanism comprises: A first connecting rod (61) fixedly connected with the first rotating shaft of the first sealing assembly; a second connecting rod (62) hinged to one end of the first connecting rod (61) away from the first sealing assembly; a third connecting rod (63) hinged to one end of the second connecting rod (62) away from the first connecting rod (61), and one end of the third connecting rod (63) away from the second connecting rod (62) being fixedly connected to a first rotating shaft of a second sealing assembly.

7. The sealing structure according to any one of claims 1-6, characterized in that, the sealing assembly (2) further comprises: a sealing groove (26) arranged on the baffle (21); a sealing piece (27) arranged in the sealing groove (26), the height of the sealing piece (27) being greater than the depth of the sealing groove (26).

8. The sealing structure according to any one of claims 2-6, characterized in that, the length of the connecting rod (251) is greater than the length of the fixed rod (252), and the connecting rod (251) and the fixed rod (252) are hinged through a pin shaft.

9. The sealing structure according to claim 7, characterized in that, the first connecting rod is specifically a length-adjustable connecting rod.

10. A heating furnace characterized by comprising: a sealing structure according to any one of claims 1-9.

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