CN218377729U

CN218377729U - Improve fire damper of discharging fume of leakproofness

Info

Publication number: CN218377729U
Application number: CN202222792418.3U
Authority: CN
Inventors: 谷远辉; 张军; 杨晔; 张炬
Original assignee: Shanghai Jinyongli Air Conditioning Fan Co ltd
Current assignee: Shanghai Jinyongli Air Conditioning Fan Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-01-24
Anticipated expiration: 2032-10-21

Abstract

The application relates to the field of smoke-discharging fire-proof valves, in particular to a smoke-discharging fire-proof valve capable of improving sealing performance, which comprises a mounting frame, wherein blades are rotatably arranged in the mounting frame, and rotating shafts of the blades are positioned in the middle of the mounting frame in the width direction; respectively be connected with a baffle on the inner wall of installing frame width direction both sides, the vertical setting of baffle, baffle direction of height's both ends are connected with the roof and the diapire of installing frame, the width of blade is greater than the distance between one side that two baffles are close to each other, blade width direction's both sides respectively are provided with a seal assembly, seal assembly includes mounting panel and elasticity gasket, seal assembly still includes the connecting piece, the elasticity gasket passes through the connecting piece and sets up on the mounting panel, one side and the blade that elastic sealing spare was kept away from to the mounting panel are connected, the elasticity gasket of blade width direction both sides is located the both sides of blade thickness direction, the blade is rotatable to elasticity gasket and baffle butt. This application has the effect that improves the fire damper leakproofness of discharging fume.

Description

Improve fire prevention valve of discharging fume of leakproofness

Technical Field

The application relates to the field of fire prevention valves of discharging fume, especially relate to a fire prevention valve of discharging fume who improves leakproofness.

Background

The smoke exhaust fire prevention valve is a fire fighting part, utilizes the temperature control of memory molten alloy, closes the valve under the action of gravity and spring mechanism, and the smoke exhaust fire prevention valve is generally installed on the pipeline of mechanical smoke exhaust system, and the smoke exhaust fire prevention valve is open at ordinary times, and when a fire breaks out, the smoke exhaust fire prevention valve opens and discharges smoke, and when the flue gas temperature reaches 280 degrees in the smoke exhaust pipeline, the smoke exhaust fire prevention valve closes to satisfy the volume of leaking smoke and fire-resistant integrality requirement in certain time, play and separate the cigarette back-fire relief effect.

In the related art, the smoke exhaust fire damper comprises a mounting frame, wherein blades are rotatably arranged in the mounting frame, and rotating shafts of the blades are positioned in the middle of the mounting frame in the width direction; the inner walls of the two sides of the mounting frame in the width direction are respectively connected with a baffle plate, the baffle plates are vertically arranged, the two ends of the baffle plates in the height direction are fixedly connected with the top wall and the bottom wall of the mounting frame, and the width of each blade is larger than the distance between the sides of the two baffle plates close to each other; when the smoke exhaust fire damper is closed, the blades rotate to the side edges of the blades and are abutted to the baffle.

In view of the above-mentioned related art, the inventor believes that, when the fireproof smoke exhaust valve is closed, after both sides of the width direction of the vane contact the baffle, a gap exists between the vane and the baffle, so that there is a possibility of smoke leakage, and the sealing performance of the fireproof smoke exhaust valve needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to improve the leakproofness of fire damper of discharging fume, this application provides an improve leakproofness's fire damper of discharging fume.

The application provides a fire damper discharges fume adopts following technical scheme:

a smoke-discharging fire-proof valve capable of improving sealing performance comprises an installation frame, wherein blades are rotationally arranged in the installation frame, and rotating shafts of the blades are positioned in the middle of the installation frame in the width direction; respectively be connected with a baffle on the inner wall of installing frame width direction both sides, the vertical setting of baffle, baffle direction of height's both ends are connected with the roof and the diapire of installing frame, and the width of blade is greater than the distance between one side that two baffles are close to each other, blade width direction's both sides respectively are provided with a seal assembly, seal assembly includes mounting panel and elasticity gasket, seal assembly still includes the connecting piece, the elasticity gasket passes through the connecting piece and sets up on the mounting panel, the mounting panel is kept away from one side and the blade connection of elastic sealing element, the elasticity gasket of blade width direction both sides is located the both sides of blade thickness direction, the blade is rotatable to elasticity gasket and baffle butt.

Through adopting above-mentioned technical scheme, when the fire prevention valve that discharges fume closed, the blade rotated towards the baffle, and the side of blade passes through elasticity gasket and baffle butt for the contact of blade and baffle is elastic contact, and the spring gasket can adapt to the gap that originally exists between blade and the baffle and make elastic deformation, has reduced the gap between blade and the baffle, thereby has improved the leakproofness of the fire prevention valve that discharges fume.

Optionally, the mounting plate includes a mounting portion for connecting the blade and a connecting portion for connecting the elastic sealing member, and the mounting portion is connected to the connecting portion; the connecting piece is splint, splint are "U" type, the inboard at splint buckle position is the spread groove, the one end that the installation department was kept away from to the one end of elasticity gasket and connecting portion all is located the spread groove, the one side that the mounting panel was kept away from to one side and the elasticity gasket of spread groove inner wall is connected, the opposite side and the connecting portion of spread groove inner wall are kept away from the lateral wall of installation department one end and are connected.

Through adopting above-mentioned technical scheme, the inner wall and the elasticity gasket of spread groove, the equal fixed connection of connecting portion, the one end of keeping away from the installation department with the one end of elasticity gasket and connecting portion all cliies, has realized being connected between elasticity gasket and the mounting panel, connects the elasticity gasket on the mounting panel from the both sides of elasticity gasket thickness direction, has improved the fastness of connecting between elasticity gasket and the mounting panel.

Optionally, a resisting plate is connected to one surface of the mounting portion, which is close to the blade, and the resisting plate is located between the clamping plate and the bottom wall of the mounting groove, and the thickness of the resisting plate is consistent with that of the clamping plate.

Through adopting above-mentioned technical scheme, when the blade rotates to elasticity gasket and baffle butt, support the plate thickness and press from both sides the plate thickness and unanimous planarization that has improved between elasticity gasket and the mounting panel, support the board and can provide the support for one section that the mounting panel was equipped with the elasticity gasket to for the elasticity gasket provides the support, improved the stability of butt between elasticity gasket and the baffle.

Optionally, the blade and the mounting plate are detachably connected.

Through adopting above-mentioned technical scheme, when seal assembly damaged, blade and mounting panel can be dismantled to be connected and be convenient for dismantle seal assembly and change, need not to change the blade, have practiced thrift the cost.

Optionally, the mounting portion is bent, an installation groove is formed in the inner side of the mounting portion, the installation groove is located on one side far away from the elastic sealing sheet, and the blade is clamped in the installation groove; the side department of blade is provided with the limiting plate, limiting plate connection is in the blade keep away from the one side of elastic sealing piece, the installation department is kept away from one of elastic sealing piece and is served and be connected with the gag lever post, set up the spacing logical groove that supplies the gag lever post to pass on the limiting plate, the gag lever post is kept away from one of installation department and is served and be provided with the mounting, it is fixed through the mounting after the gag lever post passes spacing logical groove.

Through adopting above-mentioned technical scheme, locate the mounting groove with the blade card in to make the gag lever post pass spacing logical groove, the rethread mounting is fixed with the gag lever post, has realized being connected between blade and the mounting panel.

Optionally, the fixing part is a U-shaped elastic sheet, the inner wall of the bent part of the elastic sheet is connected with one end of the limiting rod far away from the installation part, the straight section of the elastic sheet and the side wall of the limiting rod form an included angle, and the elastic sheet passes through the limiting through groove along with the limiting rod.

By adopting the technical scheme, after the elastic sheet and the limiting rod pass through the limiting through groove together, the two straight sections of the elastic sheet are pressed towards the direction of the limiting rod when passing through the limiting through groove, and after the two straight sections of the elastic sheet completely pass through the limiting through groove, the two straight sections of the elastic sheet are restored to the original state and are positioned outside the limiting through groove, so that the limiting rod is fixed in the state of passing through the limiting through groove; when dismantling seal assembly, fold two straight sections orientation that are close to each other of shell fragment for two straight sections of shell fragment can together pass spacing logical groove along with the gag lever post, together take out spacing logical inslot with gag lever post and shell fragment again, can realize seal assembly's dismantlement.

Optionally, a first protruding rod is arranged on the bottom wall of the mounting groove, a first accommodating groove for the first protruding rod to penetrate is formed in the side walls at the two ends of the blade in the width direction, one end of the first protruding rod is connected with the bottom wall of the mounting groove, and the first protruding rod penetrates through the first accommodating groove.

Through adopting above-mentioned technical scheme, when the gag lever post passed spacing logical groove, first nose bar penetrated first holding tank, has reduced the relative displacement between mounting panel and the blade, has improved the joint strength between blade and the seal assembly.

Optionally, the limiting plate includes first cell board and second cell board, first cell board place plane and blade place plane are crossing, second cell board place plane and first cell board place plane are crossing, one side and the blade of first cell board width direction are connected, the opposite side and the second cell board of first cell board width direction are connected, spacing logical groove is seted up on first cell board, one side and the mounting panel contact that the second cell board is close to first cell board.

Through adopting above-mentioned technical scheme, the second cell board is spacing and is supported the mounting panel from one side of mounting panel, has improved the stability of connecting between mounting panel and the blade, has improved the stability of connecting between seal assembly and the blade.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the smoke exhaust fire damper is closed, the blade rotates towards the baffle, the side edge of the blade is abutted against the baffle through the elastic sealing sheet, so that the blade is in elastic contact with the baffle, the spring sealing sheet can adapt to the gap originally existing between the blade and the baffle and can elastically deform, the gap between the blade and the baffle is reduced, and the sealing performance of the smoke exhaust fire damper is improved;

2. the inner wall of the connecting groove is fixedly connected with the elastic sealing sheet and the connecting part, one end of the elastic sealing sheet and one end of the connecting part far away from the mounting part are clamped, the connection between the elastic sealing sheet and the mounting plate is realized, the elastic sealing sheet is connected to the mounting plate from two sides of the thickness direction of the elastic sealing sheet, and the firmness of the connection between the elastic sealing sheet and the mounting plate is improved;

3. after the elastic sheet and the limiting rod pass through the limiting through groove together, the two straight sections of the elastic sheet are pressed towards the direction of the limiting rod when passing through the limiting through groove, and after the two straight sections of the elastic sheet completely pass through the limiting through groove, the two straight sections of the elastic sheet are restored to the original state and are positioned outside the limiting through groove, so that the limiting rod is fixed in a state of passing through the limiting through groove; when dismantling seal assembly, fold two straight sections orientation that are close to each other of shell fragment for two straight sections of shell fragment can together pass spacing logical groove along with the gag lever post, together follow spacing logical inslot with gag lever post and shell fragment and take out again, can realize seal assembly's dismantlement.

Drawings

Fig. 1 is a schematic view of an overall structure of a smoke evacuation fire damper with improved sealing performance after hiding a temperature control element and an actuator according to an embodiment of the present invention.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a schematic view of an overall structure of a smoke evacuation fire damper with improved sealing performance after hiding a temperature control element and an actuator in the second embodiment of the present application.

Fig. 4 is an enlarged view at B in fig. 3.

Fig. 5 is a schematic structural diagram for showing a limiting plate in the second embodiment of the present application.

Fig. 6 is a schematic structural diagram for showing the first protruding rod in the second embodiment of the present application.

Description of the reference numerals: 1. installing a frame; 2. a blade; 3. a baffle plate; 4. a seal assembly; 41. mounting a plate; 411. an installation part; 4111. mounting grooves; 412. a connecting portion; 42. an elastic sealing sheet; 43. a splint; 431. connecting grooves; 5. a resisting plate; 6. a limiting plate; 61. a first unit plate; 62. a second unit plate; 63. a third unit plate; 7. a limiting rod; 71. a limiting through groove; 72. a spring plate; 8. a first nose bar; 81. a first accommodating groove; 9. a second nose bar; 91. and a second accommodating groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a smoke exhaust fire prevention valve for improving sealing performance. Referring to fig. 1 and 2, improve smoke exhaust fireproof valve of leakproofness includes installing frame 1, install temperature control element in installing frame 1, actuating mechanism and blade 2, temperature control element and actuating mechanism cooperation action control smoke exhaust fireproof valve open and close, in this embodiment, blade 2 is a slice, blade 2 rotates the setting, the axis of rotation of blade 2 is located installing frame 1 width direction's centre, respectively be connected with a baffle 3 on the inner wall of installing frame 1 width direction both sides, baffle 3 is located the middle part of installing frame 1 length direction both sides inner wall, the vertical setting of baffle 3, the equal fixed connection of roof and the diapire of baffle 3 direction of height's both ends and installing frame 1, the width of blade 2 is greater than the distance between one side that two baffles 3 are close to each other, a seal assembly 4 is respectively installed to blade 2 width direction's both sides.

When the temperature reaches the closing temperature set by the smoke exhaust fire damper, the actuating mechanism drives the blades 2 to rotate, and the blades 2 rotate to the side edges of the blades 2 and are abutted against the side surfaces of the sealing component 4 and the baffle 3, so that the smoke exhaust fire damper is closed.

Referring to fig. 1 and 2, the sealing assembly 4 includes a mounting plate 41, an elastic sealing piece 42 and a clamping plate 43, wherein the elastic sealing piece 42 is an elastic steel sheet; the mounting plate 41 comprises a mounting portion 411 and a connecting portion 412, the mounting portion 411 is bent and arranged, the connecting portion 412 is straight, the mounting portion 411 and the connecting portion 412 are integrally formed, the mounting plate 41 is in a hook shape, the inner side of the mounting portion 411 is a mounting groove 4111, the mounting groove 4111 is located on one side, far away from the elastic sealing sheet 42, of the mounting plate 41, the blade 2 is located in the mounting groove 4111 and fixedly connects the blade 2 and the mounting plate 41 through a pressure riveting technology, and the elastic sealing sheet 42 is fixedly connected with one end, far away from the mounting portion 411, of the connecting portion 412 through a clamping plate 43. The elastic sealing piece 42 of 2 width direction both sides of blade is located the both sides of 2 thickness directions of blade, and blade 2 is rotatable to

elastic sealing piece

42 and 3 butts of baffle for the contact of blade 2 and baffle 3 is elastic contact, and spring sealing piece 42 can adapt to the gap that originally exists between blade 2 and the baffle 3 and make elastic deformation, has reduced the gap between blade 2 and the baffle 3, thereby has improved the leakproofness of smoke exhaust fire damper.

Referring to fig. 1 and 2, the clamping plate 43 is provided in a "U" shape, the connecting groove 431 is provided inside the bent portion of the clamping plate 43, both one end of the elastic sealing sheet 42 and one end of the connecting portion 412, which are away from the mounting portion 411, are located in the connecting groove 431, one side of the inner wall of the connecting groove 431 is fixedly connected with the elastic sealing sheet 42, and the other side of the inner wall of the connecting groove 431 is fixedly connected with the side wall of the connecting portion 412, which is away from the mounting portion 411. One end of the elastic sealing sheet 42 and one end of the connecting part 412 far away from the mounting part 411 are clamped simultaneously, so that connection between the elastic sealing sheet 42 and the mounting plate 41 is realized, the elastic sealing sheet 42 is connected to the mounting plate 41 from two sides of the elastic sealing sheet 42 in the thickness direction, and the firmness of connection between the elastic sealing sheet 42 and the mounting plate 41 is improved.

In one embodiment of the present application, an implementation principle of the smoke evacuation fire damper for improving sealing performance is as follows: the temperature control element and the actuating mechanism cooperate to drive the blade 2 to rotate towards the baffle 3, and the side edge of the blade 2 is abutted against the baffle 3 through the elastic sealing sheet 42, so that the smoke evacuation fire prevention valve is closed.

Example two

The second application embodiment discloses a fire damper of discharging fume of improvement leakproofness, refer to fig. 3 and 4, the difference of this embodiment with embodiment one lies in, fixedly connected with supports board 5 on the installation department 411 is close to the one side of blade 2, support board 5 is located between the diapire of splint 43 and mounting groove 4111, support board 5 thickness direction's one side and installation department 411 fixed connection, support board 5 ascending another side and the contact of blade 2 in thickness direction, the thickness that supports board 5 is unanimous with the thickness of splint 43 mutually, the planarization between elasticity sealing fin 42 and the mounting panel 41 has been improved. The abutting plate 5 can provide support for a section of the mounting plate 41 provided with the elastic sealing sheet 42, so that support is provided for the elastic sealing sheet 42, and the stability of abutting between the elastic sealing sheet 42 and the baffle 3 is improved.

Referring to fig. 3, 4 and 5, the blade 2 and the mounting plate 41 are detachably connected, and when the sealing assembly 4 is damaged, the blade 2 and the mounting plate 41 are detachably connected, so that the sealing assembly 4 can be conveniently detached and replaced without replacing the blade 2, and the cost is saved.

Referring to fig. 3, 4 and 5, the side edge of the blade 2 is fixedly provided with a limiting plate 6, and the limiting plate 6 is fixedly connected with one surface of the blade 2 away from the elastic sealing sheet 42, in this embodiment, two sides of the blade 2 correspond to three limiting plates 6, and at one side edge of the blade 2, the three limiting plates 6 are arranged at equal intervals along the height direction of the blade 2; one of installation department 411 is kept away from elastic sealing piece 42 serves fixed mounting and is served there is gag lever post 7, and gag lever post 7 and limiting plate 6 cooperate and use, all sets up the spacing logical groove 71 that supplies gag lever post 7 to pass on every limiting plate 6, and one of installation department 411 is kept away from to gag lever post 7 serves fixed mounting and has a mounting, and gag lever post 7 passes and fixes through the mounting behind the spacing logical groove 71. The mounting is the shell fragment 72 of "the U" type of falling, and in this embodiment, the shell fragment 72 is made by rigid material, and the one end that the installation department 411 was kept away from to gag lever post 7 becomes the arc setting, and the inner wall at shell fragment 72 bending part and the one end fixed connection that the installation department 411 was kept away from to gag lever post 7, and the straight section of shell fragment 72 and the lateral wall of gag lever post 7 form the contained angle, and shell fragment 72 passes spacing logical groove 71 along with gag lever post 7 together.

The blade 2 is clamped in the mounting groove 4111, the limiting rod 7 penetrates through the limiting through groove 71, the elastic sheet 72 and the limiting rod 7 penetrate through the limiting through groove 71 together, at the moment, two straight sections of the elastic sheet 72 are pressed towards the limiting rod 7 when passing through the limiting through groove 71, and after the two straight sections of the elastic sheet 72 completely penetrate through the limiting through groove 71, the two straight sections of the elastic sheet 72 are restored to the original state and are positioned outside the limiting through groove 71, so that the limiting rod 7 is fixed in a state of penetrating through the limiting through groove 71; when dismantling seal assembly 4, fold two straight sections orientation that are close to each other of shell fragment 72 for two straight sections of shell fragment 72 can together pass spacing logical groove 71 along with gag lever post 7, together follow spacing logical groove 71 with gag lever post 7 and shell fragment 72 again and take out, can realize seal assembly 4's dismantlement.

Referring to fig. 5, the limiting plate 6 includes a first unit plate 61 and a second unit plate 62, a plane of the first unit plate 61 is perpendicular to a plane of the blade 2, a plane of the second unit plate 62 is perpendicular to the plane of the first unit plate 61, one side of the first unit plate 61 in the width direction is fixedly connected to the blade 2, the other side of the first unit plate 61 in the width direction is fixedly connected to one side of the second unit plate 62 in the width direction, which is close to the limiting rod 7, a limiting through groove 71 is formed in the first unit plate 61 and is formed in the thickness direction of the first unit plate 61, and one side of the second unit plate 62, which is close to the elastic sealing sheet 42, is in contact with the mounting plate 41. The limiting plate 6 further comprises a third unit plate 63, a plane where the third unit plate 63 is located is parallel to a plane where the second unit plate 62 is located, one side of the third unit plate 63 in the width direction is fixedly connected with one side of the first unit plate 61 in the width direction, which is far away from the second unit plate 62, a section of the mounting portion 411, which is far away from the elastic sealing sheet 42, is located between the second unit plate 62 and the third unit plate 63, and a side wall of the mounting portion 411, which is far away from the elastic sealing sheet 42, is abutted to outer walls, which are close to each other, of the second unit plate 62 and the third unit plate 63.

When the limiting rod 7 passes through the limiting through groove 71, the second unit plate 62 and the third unit plate 63 are matched to use the thickness direction away from the installation part 411 to one section of the elastic sealing sheet 42 to limit and support the installation plate 41, so that the installation part 411 is not easy to be separated from the limiting plate 6, the stability of connection between the installation plate 41 and the blade 2 is improved, and the stability of connection between the sealing assembly 4 and the blade 2 is improved.

Referring to fig. 5 and 6, a first protruding rod 8 is fixedly mounted on the bottom wall of the mounting groove 4111, three first protruding rods 8 are arranged in each mounting groove 4111 and are arranged at equal intervals along the height direction of the mounting plate 41, a first accommodating groove 81 for the first protruding rod 8 to penetrate is formed in the side walls at the two ends of the width direction of the blade 2, one end of the first protruding rod 8 is fixedly connected with the bottom wall of the mounting groove 4111, and the first protruding rod 8 penetrates through the first accommodating groove 81. When the limiting rod 7 penetrates through the limiting through groove 71, the first protruding rod 8 penetrates into the first accommodating groove 81, relative displacement between the mounting plate 41 and the blade 2 between the blades 2 is reduced, connection strength between the mounting plate 41 and the blades 2 is improved, and connection strength between the blades 2 and the sealing assembly 4 is improved.

Referring to fig. 5 and 6, one side fixedly connected with second protruding pole 9 that the elasticity gasket 42 is close to baffle 3, second protruding pole 9 is located the position that is close to splint 43, correspond three second protruding pole 9 on every elasticity gasket 42, three second protruding pole 9 sets up along the direction of height equidistance of elasticity gasket 42, correspond on the baffle 3 and set up the second holding tank 91 that supplies second protruding pole 9 to wear to establish, the joint strength between elasticity gasket 42 and the baffle 3 has been improved, the connection reliability between seal assembly 4 and the baffle 3 has been improved, further reduce the gap between blade 2 and the baffle 3, further reduced the cigarette possibility of leaking.

In the second embodiment of the present application, an implementation principle of the smoke exhaust fire damper for improving the sealing performance is as follows: when the sealing assembly 4 is installed, the blade 2 is firstly clamped in the mounting groove 4111, at the moment, the first convex rod 8 penetrates through the first accommodating groove 81, so that the limiting rod 7 penetrates through the limiting through groove 71, the elastic sheet 72 and the limiting rod 7 penetrate through the limiting through groove 71 together, at the moment, two straight sections of the elastic sheet 72 are pressed towards the limiting rod 7 when passing through the limiting through groove 71, and after the two straight sections of the elastic sheet 72 completely penetrate through the limiting through groove 71, the two straight sections of the elastic sheet 72 are restored to the original state and are positioned outside the limiting through groove 71, so that the limiting rod 7 is fixed in a state of penetrating through the limiting through groove 71;

when dismantling seal assembly 4, fold two straight sections of shell fragment 72 towards the direction that is close to each other for two straight sections of shell fragment 72 can together pass spacing logical groove 71 along with gag lever post 7, together take out gag lever post 7 and shell fragment 72 from spacing logical inslot 71, make one section that installation department 411 kept away from elasticity gasket 42 break away from limiting plate 6 again, can realize seal assembly 4's dismantlement.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A smoke-discharging fire damper for improving sealing performance comprises a mounting frame (1), wherein blades (2) are rotatably arranged in the mounting frame (1), and rotating shafts of the blades (2) are positioned in the middle of the mounting frame (1) in the width direction; each be connected with a baffle (3) on the inner wall of installing frame (1) width direction both sides, baffle (3) vertical setting, baffle (3) direction of height's both ends are connected with the roof and the diapire of installing frame (1), and the width of blade (2) is greater than two baffles (3) and is close to each other the distance between one side, its characterized in that: blade (2) width direction's both sides respectively are provided with a seal assembly (4), seal assembly (4) include mounting panel (41) and elasticity gasket (42), seal assembly (4) still include the connecting piece, elasticity gasket (42) set up on mounting panel (41) through the connecting piece, one side and blade (2) that elastic sealing spare was kept away from in mounting panel (41) are connected, the elasticity gasket (42) of blade (2) width direction both sides are located the both sides of blade (2) thickness direction, blade (2) can be rotated to elasticity gasket (42) and baffle (3) butt.

2. A smoke evacuation fire damper for improving sealing performance according to claim 1, wherein: the mounting plate (41) comprises a mounting part (411) for connecting the blade (2) and a connecting part (412) for connecting the elastic sealing element, and the mounting part (411) is connected with the connecting part (412); the connecting piece is splint (43), splint (43) are "U" type, splint (43) buckle the inboard at position and be connecting groove (431), the one end of elastic sealing piece (42) and connecting portion (412) keep away from the one end of installation department (411) and all are located connecting groove (431), the one side of mounting panel (41) is kept away from with elastic sealing piece (42) to one side of connecting groove (431) inner wall is connected, the lateral wall that installation department (411) one end was kept away from to the opposite side and connecting portion (412) of connecting groove (431) inner wall is connected.

3. A smoke evacuation fire damper for improving sealing performance according to claim 2, wherein: the installation department (411) is connected with on the one side that is close to blade (2) and supports board (5), support board (5) and be located between the diapire of splint (43) and mounting groove (4111), the thickness that supports board (5) is unanimous with the thickness of splint (43).

4. The smoke evacuation fire damper of claim 2, wherein: the blade (2) and the mounting plate (41) are detachably connected.

5. A smoke evacuation fire damper of improved sealing ability as claimed in claim 4, wherein: the mounting portion (411) is arranged in a bending mode, a mounting groove (4111) is formed in the inner side of the mounting portion (411), the mounting groove (4111) is located on one side far away from the elastic sealing sheet (42), and the blade (2) is clamped in the mounting groove (4111); the side department of blade (2) is provided with limiting plate (6), limiting plate (6) are connected in blade (2) and are kept away from the one side of elastic sealing piece (42), installation department (411) are kept away from one of elastic sealing piece (42) and are served and are connected with gag lever post (7), set up spacing logical groove (71) that supplies gag lever post (7) to pass on limiting plate (6), gag lever post (7) are kept away from one of installation department (411) and are served and be provided with the mounting, it is fixed through the mounting after spacing logical groove (71) is passed in gag lever post (7).

6. The smoke evacuation fire damper of claim 5, wherein: the fixing piece is a U-shaped elastic sheet (72), the inner wall of the bending part of the elastic sheet (72) is connected with one end, far away from the mounting part (411), of the limiting rod (7), an included angle is formed between the straight section of the elastic sheet (72) and the side wall of the limiting rod (7), and the elastic sheet (72) penetrates through the limiting through groove (71) along with the limiting rod (7).

7. A smoke evacuation fire damper of improved sealing ability as claimed in claim 5, wherein: be provided with first nose bar (8) on the diapire of mounting groove (4111), set up first holding tank (81) that supply first nose bar (8) to penetrate on the lateral wall at blade (2) width direction both ends, the one end of first nose bar (8) and the diapire of mounting groove (4111) are connected, first nose bar (8) are worn to locate in first holding tank (81).

8. The smoke evacuation fire damper of claim 5, wherein: limiting plate (6) include first cell board (61) and second cell board (62), first cell board (61) place plane and blade (2) place plane are crossing, second cell board (62) place plane and first cell board (61) place plane are crossing, first cell board (61) width direction's one side and blade (2) are connected, first cell board (61) width direction's opposite side and second cell board (62) are connected, spacing logical groove (71) are seted up on first cell board (61), second cell board (62) are close to one side and mounting panel (41) contact of first cell board (61).