High-air-tightness air valve

Abstract

The utility model belongs to the technical field of air duct valves, and discloses a high-air-tightness air valve which comprises a valve frame body and a plurality of rotating shafts and valve blades with the same number, the valve blades are divided into middle blades and side blades according to installation positions, the number of the rotating shafts is even, and the number of the valve blades is even. Different from the mode that multiple blades rotate synchronously in the same direction and then are in lap joint with one another to achieve sealing, sealing is conducted innovatively through inserting connection between the blades, the valve blades with the even number are arranged, rotating shafts of the valve blades are equally divided into two sets at the odd number position and the even number position, and the two sets of rotating shafts are connected through two sets of connecting rod mechanisms; synchronous and same-direction rotation of each group of rotating shafts is realized; the sealing structure is arranged between the two blades, so that the sealing performance between the two blades is effectively improved, complete sealing of the air valve is achieved, air circulation is effectively blocked, the resistance of the blades to air pressure is enhanced, and the sealing structure is internally coated with a fireproof material, so that the air valve has efficient fireproof capacity.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of air duct valve, concretely relates to a high air tightness air valve. BACKGROUND

[0002] The traditional air valve is closed and opened to the air duct through the overlapping structure of the blade and the blade, the strength of this structure is low, the sealing performance is poor, and the maintenance is very complex, and even cannot be maintained, therefore, the driving structure of the air valve blade and the sealing mechanism form need to be redesigned to solve the many technical problems existing in the prior art. UTILITY MODEL CONTENTS

[0003] Therefore, the utility model aims at providing a high air tightness air valve to solve the above problems.

[0004] In order to realize the above object, the utility model adopts the following technical scheme:

[0005] A high air tightness air valve, including valve frame body and multiple same number of rotating shafts and valve blades, the valve blade is divided into middle blade and side blade in the installation position, the number of multiple rotating shafts is even, and is connected to the inside of the valve frame body along the horizontal direction bearing, two rotating shafts in the center of the valve frame body are arranged as driving shafts, a synchronous driving mechanism is arranged between the top of two driving shafts, two driving shafts are driven to rotate in opposite directions through the synchronous driving mechanism, each rotating shaft in the odd position and each rotating shaft in the even position are connected with two groups of connecting rod mechanisms to realize synchronous rotation respectively, the rotating shaft closest to one side of the valve frame body is fixedly installed with the side blade along the vertical direction, the remaining rotating shafts are fixedly installed with the middle blade, the vertical edge of one side of the middle blade is provided with a sealing structure, the sealing structures of two adjacent middle blades are not on the same side, one of two side blades is fixedly installed with the sealing structure, the sealing structure of this side blade and the sealing structure of the adjacent middle blade are not on the same side, the sealing structure of the middle blade and the non-installed vertical edge of the adjacent side blade or the adjacent middle blade are inserted and sealed, the sealing structure of the side blade and the non-installed vertical edge of the adjacent middle blade are inserted and sealed, the side blade is bent to form a sealing bent edge on the side close to the inner side wall of the valve frame body, the sealing bent edge is inserted into the sealing groove, the sealing groove is fixedly installed at the middle of the inner side wall of the valve frame body along the vertical direction, each middle blade and each side blade are driven by the synchronous driving mechanism to be connected head to tail or arranged in parallel with each other, and any driving shaft is fixedly installed with the rotating end of the rotating motor or the manual handle.

[0006] In a preferred embodiment of the utility model, the synchronous driving mechanism includes A synchronous mechanism 4 and B synchronous mechanism,

[0007] The A synchronous mechanism 4 includes two rotating wheels and a steel wire rope, two rotating wheels are fixedly installed at two driving shafts near the top respectively, the steel wire rope is in the shape of "8" and is connected between two rotating wheels, the steel wire rope is connected with two rotating wheels at a point through two groups of fixed bolts.

[0008] In a preferred embodiment of the utility model, the B synchronous mechanism includes two gears and a chain, two gears are fixedly installed at two driving shafts near the top respectively, the chain is in the shape of "8" and is transmissionally connected between two gears.

[0009] In a preferred embodiment of the utility model, the connecting rod mechanism includes a pull rod and a plurality of rotating rods, one end of a plurality of rotating rods is evenly arranged and hinged along the length direction of the pull rod, the other end of a plurality of rotating rods is fixedly connected with each rotating shaft at odd positions or even positions respectively.

[0010] In a preferred embodiment of the utility model, the sealing structure includes a steel plate and two elastic steel sheets, the steel plate is bent into H-shaped structure, the outer side of one side of the H-shaped structure is turned outward into a horn-shaped structure, the two ends of the horn-shaped structure are bent inward to press and fix one end of two elastic steel sheets respectively, the other end of the H-shaped structure is inserted with the vertical edge of one side of the valve blade, the interval of two elastic steel sheets is less than the thickness of the valve blade.

[0011] In a preferred embodiment of the utility model, the sealing structure includes a steel plate and two elastic steel sheets, the steel plate is bent into H-shaped structure, the outer side of both ends of one side of the H-shaped structure is turned outward into a horn-shaped structure, the other end of the H-shaped structure is bent inward to form a U-shaped groove, one end of the elastic steel sheet is inserted into the bending gap of the U-shaped groove and is fixed, the interval of two elastic steel sheets is less than the thickness of the valve blade, the U-shaped groove is inserted with the vertical edge of one side of the valve blade.

[0012] In a preferred embodiment of the utility model, the sealing structure includes a steel plate, the steel plate is bent into H-shaped structure, the outer side of both ends of one side of the H-shaped structure is turned outward into a horn-shaped structure, the horn-shaped structure is provided with fireproof paint that expands when high temperature is met, the other end of the H-shaped structure is bent inward to form a U-shaped groove, the U-shaped groove is inserted with the vertical edge of one side of the valve blade.

[0013] In a preferred embodiment of the utility model, the sealing structure includes two elastic steel sheets and two pressing plates, the two pressing plates are fixedly installed on the opposite sides of the valve blade through rivets, the elastic steel sheets are clamped between the pressing plates and the valve blade and are fixed through the rivets, the front ends of the two pressing plates are outwardly folded to form a horn-shaped structure, and the interval of the two elastic steel sheets is smaller than the thickness of the valve blade.

[0014] In a preferred embodiment of the utility model, the sealing structure includes two elastic steel sheets and a pressing plate, a stepped portion is pressed on the vertical edge of one side of the valve blade, the two elastic steel sheets are clamped between the stepped portion and the pressing plate and are fixed through a rivet, the front ends of the stepped portion and the pressing plate are outwardly folded to form a horn-shaped structure, and the interval of the two elastic steel sheets is smaller than the thickness of the valve blade.

[0015] In a preferred embodiment of the utility model, the sealing structure includes two elastic steel sheets, a stepped portion is pressed on the vertical edge of one side of the valve blade, the two valve blades are adhered and are fixed through a rivet, the two stepped portions form a horn-shaped structure, the two elastic steel sheets are inside the horn-shaped structure, and the interval of the two elastic steel sheets is smaller than the thickness of the valve blade.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model is different from the sealing realized by the synchronous and same-direction rotation of the multiple blades and the mutual lapping, innovatively seals through the insertion between the blades, sets the number of valve blades as even number, divides the rotation shafts of the valve blades into two groups of odd and even number positions, connects the two groups of rotation shafts through two groups of connecting rod mechanisms, realizes the synchronous and same-direction rotation of each group of rotation shafts, so that the rotation directions of the two adjacent valve blades are opposite, and the two valve blades are first and lastly mutually engaged to be in the sealing state of a character, so that the sealing performance between the two blades is effectively improved, the complete sealing of the air valve is realized, the air circulation is effectively blocked, the resistance of the blade to the wind pressure is enhanced, and the air valve has high fireproof capability through the coating of fireproof material in the sealing structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole plane structure schematic diagram of the utility model;

[0019] Figure 2 It is the plane structure schematic diagram of A synchronous mechanism;

[0020] Figure 3 It is the plane structure schematic diagram of B synchronous mechanism;

[0021] Figure 4 It is the plane structure schematic diagram of connecting rod mechanism;

[0022] Figure 5 Planar structural diagram of six embodiments of the sealing structure;

[0023] Figure 6 Flow chart from the closed state to the open state of the present application.

[0024] In the figure: 1, valve frame; 11, sealing groove; 2, middle blade; 3, connecting rod mechanism; 31, pull rod; 32, rotating rod; 4, A synchronous mechanism; 41, rotating wheel; 42, steel wire rope; 43, fixing bolt; 5, sealing structure; 51, elastic steel sheet; 52, steel plate; 53, rivet; 54, pressing plate; 55, stepped portion; 56, fireproof paint; 6, B synchronous mechanism; 61, gear; 62, chain; 7, side blade; 71, sealing folded edge; 8, driving shaft. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] The present application will be further described below in combination with the drawings and specific embodiments.

[0027] Please refer to Figures 1-6As shown, the embodiment of the application provides a high air-tightness air valve, which comprises a valve frame 1 and a plurality of same number of rotating shafts and valve blades, the valve blades are divided into middle blades 2 and side blades 7 in the installation position, the number of the rotating shafts is even, and the rotating shafts are connected to the inside of the valve frame 1 in a uniform transverse bearing, two rotating shafts in the center of the valve frame 1 are provided as driving shafts 8, a synchronous driving mechanism is arranged between the top of the two driving shafts 8, the two driving shafts are driven to rotate in opposite directions synchronously through the synchronous driving mechanism, each rotating shaft in an odd position and each rotating shaft in an even position are respectively connected with two groups of connecting rod mechanisms 3 to realize synchronous rotation, the rotating shaft closest to one side of the valve frame 1 is fixedly installed with a side blade 7 along the vertical direction, the remaining rotating shafts are all fixedly installed with middle blades 2, a vertical edge of one side of the middle blade 2 is provided with a sealing structure 5, the sealing structures 5 of two adjacent middle blades 2 are not on the same side, one of the two side blades 7 is fixedly installed with a sealing structure 5, the sealing structure 5 of the side blade 7 is not on the same side as the sealing structure 5 of the adjacent middle blade 2, the sealing structure 5 of the middle blade 2 is inserted and sealed with the non-installed vertical edge of the adjacent side blade 7 or the adjacent middle blade 2, and the sealing structure 5 of the side blade 7 is inserted and sealed with the non-installed vertical edge of the adjacent middle blade 2, the side blade 7 is bent to form a sealing bent edge 71 on the side close to the inner side wall of the valve frame, the sealing bent edge 71 is inserted into a sealing groove 11, the sealing groove 11 is fixedly installed at the middle of the inner side wall of the valve frame along the vertical direction, each middle blade 2 and each side blade 7 are driven by the synchronous driving mechanism to be connected head to tail or arranged in parallel with each other, and any driving shaft 8 is fixedly installed with a rotating end of a rotating motor or a manual handle.

[0028] Specifically, as shown in Figure 1 , 6 The present air valve is different from the conventional sealing mode, i.e. the shutter structure, and is different from the sealing achieved by the synchronous rotation of the multiple blades in the same direction and the mutual lapping, and innovatively utilizes the insertion between the blades for sealing, by arranging an even number of valve blades, dividing the rotating shafts of the valve blades into two groups of odd and even positions, and connecting the two groups of rotating shafts through two groups of connecting rod mechanisms 3 to realize the synchronous rotation of each group of rotating shafts.

[0029] Meanwhile, by setting the two rotating shafts in the center of the valve frame body as the driving shafts 8, by synchronously driving the two driving shafts 8 in opposite directions through the synchronous driving mechanism, the two groups of rotating shafts are driven to rotate in different directions through the two groups of connecting rod mechanisms 3, so that the rotating directions of the two adjacent valve blades are opposite, and the first and the last are mutually engaged in a linear sealing state, and, in order to increase the sealing performance of the blade engagement gap, the valve blade is provided with a plurality of middle blades 2 and two side blades 7, and since the rotating directions of the two adjacent middle blades 2 are opposite, the sealing structure 5 is arranged on the vertical edges on the different sides of the two adjacent middle blades 2, so that the sealing structure 5 is inserted into the vertical edge of the adjacent middle blade 2 which is not provided with the sealing structure 5 after rotating, thereby improving the sealing performance between the two blades. According to this logic, only the vertical edge of one side blade 7 needs to be provided with a sealing structure 5, and the other side blade 7 does not need to be provided with a sealing structure 5. Finally, by bending the end of the side blade 7 in contact with the valve frame body to form a sealing folded edge 71 and inserting it into the sealing groove 11 arranged in the inner wall of the valve frame body, the complete sealing of the air valve can be realized, thereby effectively blocking the air flow and enhancing the resistance of the blade to the wind pressure.

[0030] Further, the synchronous driving mechanism includes an A synchronous mechanism 4 and a B synchronous mechanism 6.

[0031] The A synchronous mechanism 4 includes two rotating wheels 41 and a steel wire rope 42. The two rotating wheels 41 are fixedly installed on the two driving shafts 8 near the top, and the steel wire rope 42 is wound between the two rotating wheels 41 in the shape of an "8". The steel wire rope 42 is connected to the two rotating wheels 41 at one point through two groups of fixed bolts 43.

[0032] Specifically, as shown in Figure 2 in order to realize the synchronous and reverse rotation of the two driving shafts 8, the steel wire rope 42 is wound between the two rotating wheels 41 in the shape of an "8" and is fixed to the two rotating wheels 41 at two points through the fixed bolts 43. Then, one of the driving shafts 8 is rotated by a rotating motor or a manual crank, thereby driving one rotating wheel 41 to rotate, and the other driving shaft 8 and rotating wheel 41 are synchronously rotated in the opposite direction under the transmission connection of the steel wire rope 42. Since the two driving shafts 8 belong to two groups of rotating shafts, the two groups of rotating shafts in the odd and even positions are finally rotated in the same direction through the transmission of the two groups of connecting rod mechanisms 3, thereby realizing the opening and closing actions of the valve blades.

[0033] The B synchronous mechanism 6 includes two gears 61 and a chain 62. The two gears 61 are fixedly installed on the two driving shafts 8 near the top, and the chain 62 is transmissionally connected between the two gears 61 in the shape of an "8".

[0034] Specifically, as shown inFigure 3 As shown, in order to further stabilize and enhance the transmission force, gears 61 and chains 62 are used to achieve this structure, which is another form of implementation of the air valve, which is beneficial to further improve the overall performance of the air valve, and also further enhances the strength of the structure, which can resist stronger wind pressure.

[0035] The connecting rod mechanism 3 includes a pull rod 31 and a plurality of rotating rods 32, one end of the plurality of rotating rods 32 is uniformly arranged and hinged along the length direction of the pull rod 31, and the other end of the plurality of rotating rods 32 is respectively fixedly connected with each rotating shaft at odd positions or even positions.

[0036] Specifically, as shown in the figure, Figure 4 The connecting rod mechanism 3 is a parallel connecting rod mechanism 3, and the pull rod 31 can only move forward and backward according to the law to realize the synchronous and same direction rotation of each rotating shaft connected therewith.

[0037] The air valve designs the following five kinds of sealing structure 5 forms according to different practical environment, cost control and production process:

[0038] The sealing structure 5a includes a steel plate 52 and two elastic steel sheets 51, the steel plate 52 is bent into an H-shaped structure, one side of the H-shaped structure is outwardly turned into a horn-shaped structure, and the two ends of the horn-shaped structure are inwardly bent to tightly fix one end of the two elastic steel sheets 51, the other end of the H-shaped structure is inserted with the vertical edge of one side of the valve blade, and the spacing of the two elastic steel sheets 51 is less than the thickness of the valve blade.

[0039] The sealing structure 5b includes a steel plate 52 and two elastic steel sheets 51, the steel plate 52 is bent into an H-shaped structure, both ends of one side of the H-shaped structure are outwardly turned into a horn-shaped structure, the other end of the H-shaped structure is inwardly bent to form a U-shaped groove, one end of the elastic steel sheet 51 is inserted into the bending gap of the U-shaped groove and fixed, the spacing of the two elastic steel sheets 51 is less than the thickness of the valve blade, and the U-shaped groove is inserted with the vertical edge of one side of the valve blade.

[0040] The sealing structure 5c includes a steel plate 52, the steel plate 52 is bent into an H-shaped structure, both ends of one side of the H-shaped structure are outwardly turned into a horn-shaped structure, the horn-shaped structure is provided with fireproof paint 56 which expands at high temperature, the other end of the H-shaped structure is inwardly bent to form a U-shaped groove, and the U-shaped groove is inserted with the vertical edge of one side of the valve blade.

[0041] The sealing structure 5d includes two elastic steel sheets 51 and two pressing plates 54, the two pressing plates 54 are respectively fixedly installed on the front and back of one side of the valve blade through rivets 53, the elastic steel sheets 51 are clamped between the pressing plates 54 and the valve blade and fixed through the rivets 53, the front ends of the two pressing plates 54 are outwardly turned to form a horn-shaped structure, and the spacing of the two elastic steel sheets 51 is less than the thickness of the valve blade.

[0042] The sealing structure 5e includes two elastic steel sheets 51 and a pressing plate 54, a step difference part 55 is pressed out on the vertical edge of one side of the valve blade, the two elastic steel sheets 51 are clamped between the step difference part 55 and the pressing plate 54 and are fixed by rivets 53, the front ends of the step difference part 55 and the pressing plate 54 are turned outwards to form a horn-shaped structure, and the interval of the two elastic steel sheets 51 is smaller than the thickness of the valve blade.

[0043] The sealing structure 5f includes two elastic steel sheets 51, a step difference part 55 is pressed out on the vertical edge of one side of the valve blade, two valve blades are adhered and fixed by rivets 53, two step difference parts 55 form a horn-shaped structure, the two elastic steel sheets 51 are inside the horn-shaped structure, and the interval of the two elastic steel sheets 51 is smaller than the thickness of the valve blade.

[0044] Specifically, as shown in the figure, Figure 5 the sealing structure 5 is divided into detachable types (a, b, c) and integral types (d, e, f) according to the mounting form of the valve blade;

[0045] In the detachable types (a, b, c), the steel plate 52 is bent to form an H-shaped structure, and the two ends of one side of the H-shaped structure are turned outwards to form a horn-shaped structure to facilitate the insertion and connection with the vertical edge of the adjacent valve blade, and the two elastic steel sheets 51 are fixed and mounted in the horn-shaped structure by turning inwards or clamping in the bending gap of the U-shaped groove to clamp and stabilize the valve blade, and the U-shaped groove is inserted and mounted with the vertical edge of the valve blade. The advantage of this structure is that it can be produced in a single module, which is convenient for installation and disassembly, thereby facilitating the maintenance of the air valve;

[0046] In addition, in order to make the air valve have high efficient fireproof performance, the elastic steel sheet 51 is removed, and fireproof paint 56 is applied inside the horn-shaped structure. In the sealed state, if a fire occurs, the fireproof paint 56 expands after being exposed to high temperature, thereby completely blocking the connecting gap between the valve blades, thereby completely blocking the spread of high temperature air.

[0047] In the integral types (d, e, f), the pressing plate 54 is installed at the vertical edge of the valve blade, the two pressing plates 54 form a horn-shaped structure, and the pressing plate 54 and the internal elastic steel sheet 51 are assembled by rivets 53 to form the sealing structure 5, thereby simplifying the production process and reducing the production cost, and also increasing the overall rigidity of the blade, making the blade more durable;

[0048] In addition, in order to further simplify the production process and reduce the cost, the vertical edge of one side of the valve blade is formed into a step difference part 55 by pressing and bending processes, and the pressing plate 54 is combined to form a horn-shaped structure, thereby further saving materials;

[0049] In addition, in order to further improve the strength of the blade, the two valve segment difference parts 55 are aligned to form a horn-shaped structure, and then the two are fixed by rivets 53, which can further simplify the production process.

[0050] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and not for limiting the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-air-tightness damper comprising a valve frame (1) and a plurality of equal number of rotating shafts and valve leaves, characterized in that: The valve blades are divided into middle blades (2) and side blades (7) in the installation position, the number of the plurality of rotating shafts is even, and the rotating shafts are connected to the inside of the valve frame (1) in a uniform transverse bearing, two rotating shafts in the center of the valve frame (1) are provided as driving shafts (8), a synchronous driving mechanism is provided between the top of the two driving shafts (8), the two driving shafts are driven to rotate in opposite directions by the synchronous driving mechanism, each of the rotating shafts in the odd position and each of the rotating shafts in the even position are connected with two groups of connecting rod mechanisms (3) to realize synchronous rotation, respectively, the rotating shaft closest to one side of the valve frame (1) is fixedly installed with the side blade (7) in the vertical direction, the remaining rotating shafts are fixedly installed with the middle blade (2), the vertical edge of one side of the middle blade (2) is provided with a sealing structure (5), the sealing structures (5) of two adjacent middle blades (2) are not on the same side, one of the two side blades (7) is fixedly installed with the sealing structure (5), the sealing structure (5) of the side blade (7) is not on the same side as the sealing structure (5) of the adjacent middle blade (2), the sealing structure (5) of the middle blade (2) is inserted and sealed with the non-installed vertical edge of the adjacent side blade (7) or the adjacent middle blade (2), the sealing structure (5) of the side blade (7) is inserted and sealed with the non-installed vertical edge of the adjacent middle blade (2), the side blade (7) is bent to form a sealing bent edge (71) by rotating close to one side of the inner side wall of the valve frame, the sealing bent edge (71) is inserted into a sealing groove (11), the sealing groove (11) is fixedly installed in the middle of the inner side wall of the valve frame in the vertical direction, each of the middle blades (2) and each of the side blades (7) are connected head to tail or arranged parallel to each other by the synchronous driving mechanism, and any one of the driving shafts (8) is fixedly installed with a rotating end of a rotating motor or a manual handle.

2. A high air-tightness damper according to claim 1, characterized in that: The synchronous driving mechanism comprises an A synchronous mechanism 4 (4) and a B synchronous mechanism (6); The A synchronous mechanism 4 (4) comprises two rotating wheels (41) and a steel wire rope (42), the two rotating wheels (41) are fixedly installed near the top of the two driving shafts (8), respectively, the steel wire rope (42) is wound between the two rotating wheels (41) in the shape of "8", and the steel wire rope (42) is connected with the two rotating wheels (41) at one point by two groups of fixed bolts (43).

3. A high air-tightness damper according to claim 2, characterized in that: The B synchronous mechanism (6) comprises two gears (61) and a chain (62), the two gears (61) are fixedly installed near the top of the two driving shafts (8), respectively, and the chain (62) is drivingly connected between the two gears (61) in the shape of "8".

4. A high air-tightness damper according to claim 1, characterized in that: The connecting rod mechanism (3) comprises a pull rod (31) and a plurality of rotating rods (32), one end of the plurality of rotating rods (32) is uniformly arranged and hinged along the length direction of the pull rod (31), and the other end of the plurality of rotating rods (32) is respectively fixedly connected with each rotating shaft at odd positions or even positions.

5. A high air-tightness damper according to claim 1, characterized in that: The sealing structure (5) comprises a steel plate (52) and two elastic steel sheets (51), the steel plate (52) is bent into an H-shaped structure, one side of the H-shaped structure is outwardly bent into a horn-shaped structure, both ends of the horn-shaped structure are inwardly bent to press and fix one end of the two elastic steel sheets (51) respectively, the other end of the H-shaped structure is inserted with a vertical edge of one side of the valve blade, and the interval of the two elastic steel sheets (51) is smaller than the thickness of the valve blade.

6. A high air-tightness damper according to claim 1, characterized in that: The sealing structure (5) comprises a steel plate (52) and two elastic steel sheets (51), the steel plate (52) is bent into an H-shaped structure, both ends of one side of the H-shaped structure are outwardly bent into horn-shaped structures, the other end of the H-shaped structure is inwardly bent to form a U-shaped groove, one end of the elastic steel sheet (51) is inserted into the bending gap of the U-shaped groove and fixed, and the interval of the two elastic steel sheets (51) is smaller than the thickness of the valve blade.

7. A high air-tightness damper according to claim 1, characterized in that: The sealing structure (5) comprises a steel plate (52), the steel plate (52) is bent into an H-shaped structure, both ends of one side of the H-shaped structure are outwardly bent into horn-shaped structures, the other end of the H-shaped structure is inwardly bent to form a U-shaped groove, the U-shaped groove is inserted with a vertical edge of one side of the valve blade.

8. A high air-tightness damper according to claim 1, characterized in that: The sealing structure (5) comprises two elastic steel sheets (51) and two pressing plates (54), the two pressing plates (54) are fixedly installed on the front and back surfaces of one side of the valve blade through rivets (53), the elastic steel sheets (51) are clamped between the pressing plates (54) and the valve blade and fixed through the rivets (53), the front ends of the two pressing plates (54) are outwardly bent to form horn-shaped structures, and the interval of the two elastic steel sheets (51) is smaller than the thickness of the valve blade.

9. A high air-tightness damper according to claim 1, characterized in that: The sealing structure (5) comprises two elastic steel sheets (51) and a pressing plate (54), a vertical edge of one side of the valve blade is pressed to form a stepped portion (55), the two elastic steel sheets (51) are clamped between the stepped portion (55) and the pressing plate (54) and fixed through a rivet (53), the front ends of the stepped portion (55) and the pressing plate (54) are outwardly bent to form horn-shaped structures, and the interval of the two elastic steel sheets (51) is smaller than the thickness of the valve blade.

10. A high air-tightness damper according to claim 1, characterized in that: The sealing structure (5) comprises two elastic steel sheets (51), a vertical edge of one side of the valve blade is pressed to form a stepped portion (55), and two valve blades are clamped and fixed through a rivet (53), the two stepped portions (55) form horn-shaped structures, the two elastic steel sheets (51) are inside the horn-shaped structures, and the interval of the two elastic steel sheets (51) is smaller than the thickness of the valve blade.

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