A locking mechanism for a high-sealing smoke exhaust fire damper

Abstract

The present invention discloses a locking mechanism for a high-sealing smoke exhaust fire damper, and relates to the technical field of smoke exhaust fire dampers. The present invention comprises a ventilation device, which comprises a pipe A, a fixing frame is fixedly sleeved on the outer surface of the pipe A, a bolt is penetrated on one side of the fixing frame, and is rotatably connected with the bolt, a nut is threadedly connected to the end of the bolt away from the fixing frame, and a pipe B is arranged on the side of the fixing frame away from the pipe A. The present invention realizes that the rubber rod is softened by excessive pipe temperature through the coordination of the torsion of the torsion spring with components such as the rotating rod A, the fixing plate and the screw rod, so that the fixing plate is not subjected to force, the rotating rod A is rotated by the reset property of the torsion spring on the rotating rod A, so that the rotating rod A drives the fixing plate to rotate, and then the fixing plate and the inner wall of the pipe A are contacted with each other, so as to achieve the effect of blocking smoke and dust and preventing the fire from spreading through the pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of smoke exhaust fire dampers, and in particular relates to a locking mechanism of a high-sealing smoke exhaust fire damper. Background Art

[0002] The fire protection system is an indispensable component in building construction. When a fire occurs in a building, the fire protection system can play a good role in fire prevention and fire retardation, and can extend the escape time for people.

[0003] According to a locking mechanism of a high-sealability smoke exhaust fire damper (Announcement No.: CN117028655B) disclosed, it includes a square valve body, a valve plate is rotatably connected between the top and bottom of the inner cavity of the valve body, a first hollow rotating rod is fixedly connected to the top of the valve plate, the inner cavity of the valve plate is a hollow structure and is provided with a locking mechanism, and a driving mechanism is installed on the top of the valve body. In the present invention, an integrated valve plate is provided, so that when the valve plate is closed, there will be no problem of loose contact between the blades, and by providing a locking mechanism on the valve plate, the locking mechanism drives the first rotating rod and the screw to rotate under the drive of the driving mechanism, and then drives the two sliding bars and the first locking rod to slide out of the valve plate and insert into the first plug-in groove of the valve body, so that the strength of the valve plate in the closed state is improved by the mutual cooperation between the first locking rod and the first plug-in groove, so that the valve plate can withstand greater pressure, thereby improving the strength of the smoke exhaust fire damper. However, in the above device, it is difficult to achieve the effect of blocking a large amount of smoke and dust through the mutual cooperation of components such as the valve body and the valve plate, resulting in the spread of fire through the pipeline, which needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a locking mechanism for a smoke exhaust fire damper with high sealing performance. When the temperature of the pipeline is too high, the rubber rod is softened, so that the fixed plate is not subjected to force. The turning rod A is rotated by the reset property of the torsion spring on the turning rod A, so that the turning rod A drives the fixed plate to rotate, and then the fixed plate and the inner wall of the pipeline A are brought into contact with each other, thereby solving the existing problems.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a locking mechanism for a high-sealing smoke exhaust fire damper, comprising a ventilation device, wherein the ventilation device comprises a pipe A, a fixing frame is fixedly sleeved on the outer surface of the pipe A, a bolt is passed through one side of the fixing frame and is rotatably connected with the bolt, a nut is threadedly connected to one end of the bolt away from the fixing frame, and a pipe B is arranged on the side of the fixing frame away from the pipe A;

[0007] A closing device is provided inside the ventilation device, and the closing device includes a rotating rod A, one end of which passes through the top of the inner wall of the pipe A and is rotatably connected to the pipe A. A torsion spring is fixedly sleeved on the outer surface of the rotating rod A, one end of the torsion spring is fixedly connected to the bottom of the inner wall of the pipe A, the other end of the torsion spring is fixedly connected to the circumferential surface of the rotating rod A, a fixing plate is fixedly connected to the circumferential surface of the rotating rod A, a screw rod is rotatably connected to the inner wall of the pipe A, a block is fixedly connected to the circumferential surface of the screw rod, a sliding groove is provided on the side of the inner wall of the pipe A close to the screw rod, a spring A is fixedly connected to the inner wall of the sliding groove, one end of the spring A away from the inner wall of the sliding groove is fixedly connected to one side of the block, and one end of the inner wall of the pipe A away from the screw rod is fixedly connected to a rubber rod.

[0008] Furthermore, the number of the fixing frames is two, and they are symmetrical with each other along the vertical center axis of the pipeline A. The number of the bolts is four, which are arranged in groups of two and are symmetrical with each other along the vertical center axis of the fixing frames. The above design is conducive to connecting pipeline A and pipeline B through the fixing frames and bolts.

[0009] Furthermore, one end of the rubber rod away from the pipe A contacts with a fixed plate, and there are two fixed plates, which are symmetrical with each other along the vertical center axis of the rotating rod A. The above design is conducive to the contact between the fixed plate and the inner wall of the pipe A, thereby blocking smoke and dust.

[0010] Furthermore, an alarm device is provided inside the ventilation device, and the alarm device includes a gear A, an end of the rotating rod A away from the inner wall of the pipe A penetrates the gear A and is fixedly connected to the gear A, a fixing rod is fixedly connected to the top of the pipe A, an end of the fixing rod away from the pipe A penetrates the gear B and is rotatably connected to the gear B, a rack is slidably connected to the top of the pipe A, a push plate is fixedly connected to one side of the rack, a slide rail A is provided at the top of the pipe A, a slide rail B is provided at the top of the pipe B, a rolling ball is provided inside the slide rail A, an L-shaped through groove is provided on the inner wall of the slide rail B, an alarm bell is provided on the inner wall of the L-shaped through groove, a spring B is fixedly connected to the side of the alarm bell away from the L-shaped through groove, a pressure block is fixedly connected to the end of the spring B away from the alarm bell, and a push rod is fixedly connected to the side of the pressure block close to the spring B. The above design is conducive to an alarm effect when the temperature of the pipe is too high.

[0011] Furthermore, the push rod is located inside the spring B, the alarm bell is located on the displacement track of the push rod, and the side of the pressure block away from the spring B is set as an inclined surface. The above design is conducive to driving the push rod to knock the alarm bell through the pressure block.

[0012] Furthermore, the slide rail A is interconnected with the slide rail B, the pressing block is located on the displacement track of the rolling ball, and the rolling ball is located on the displacement track of the push plate. The above design is conducive to pushing the rolling ball through the push plate, so that the rolling ball squeezes the pressing block.

[0013] Furthermore, a smoke exhaust device is provided inside the ventilation device, and the smoke exhaust device includes a rotating shaft, which is rotatably connected to the top of the inner wall of the L-shaped through groove, a positioning rod A is fixedly connected to the circumferential surface of the rotating shaft, a positioning rod B is fixedly connected to the circumferential surface of the rotating shaft, a switch is provided on the inner wall of the L-shaped through groove, a dust cover is fixedly connected to the top of the inner wall of the pipe B, a motor is fixedly connected to the top of the inner wall of the pipe B, the output shaft of the motor is fixedly connected to the rotating rod B, fan blades are fixedly connected to the circumferential surface of the rotating rod B, and the motor is electrically connected to the switch. The above design is conducive to exhausting smoke from the pipe.

[0014] Furthermore, the positioning rod A is located between the pressing block and the alarm bell, the positioning rod A is located on the displacement trajectory of the pressing block, and the switch is located on the displacement trajectory of the positioning rod B. The above design is conducive to squeezing the positioning rod A through the pressing block, so that the positioning rod A drives the positioning rod B to squeeze the switch through the rotating shaft.

[0015] Furthermore, the motor is located inside the dust cover, the number of the fan blades is three, and they are arranged in a circular array on the circumferential surface of the rotating rod B. The fan blades are located inside the dust cover. The above design is conducive to achieving the smoke exhaust effect through the high-speed rotation of the fan blades.

[0016] Furthermore, both sides of the inner wall of the pipe A are located on the displacement track of the fixed plate, the gear A is meshed with the gear B, and the gear B is meshed with the rack. The above design is conducive to the rotation of the rotating rod A, so that the rotating rod A drives the gear A to rotate, and then the gear A drives the gear B to rotate.

[0017] The present invention has the following beneficial effects:

[0018] The present invention achieves that the temperature of the pipeline is too high, so that the rubber rod is softened, so that the fixed plate is not subjected to force, and the rotating rod A is rotated by the reset property of the torsion spring on the rotating rod A, so that the rotating rod A drives the fixed plate to rotate, and then the fixed plate and the inner wall of the pipeline A are brought into contact with each other, thereby achieving the effect of blocking smoke and dust and preventing the fire from spreading through the pipeline.

[0019] The present invention realizes that the rotating force of the rotating rod A cooperates with components such as gear A, the fixed rod and the gear B, so that the rotating rod A drives the gear A to rotate, and the gear A drives the gear B to rotate, and then the gear B drives the rack to move horizontally, so that the rack drives the push plate to push the ball in the track A, and then the ball rolls along the tracks of the slide rails A and the slide rails B, so that the ball squeezes the pressure block, and the pressure block drives the push rod to hit the alarm bell, thereby achieving the effect of alarm warning.

[0020] The present invention realizes that the positioning rod A is squeezed by the pressure block through the cooperation of the extrusion force of the pressure block with the rotating shaft, the positioning rod A and the positioning rod B, so that the positioning rod A drives the positioning rod B to squeeze the switch on the L-shaped through groove through the rotating shaft. The switch is electrically connected to the motor, so that the motor drives the rotating rod B to rotate, so that the rotating rod B drives the fan blades thereon to rotate, and then the fan blades rotate at high speed, thereby achieving the effect of exhausting smoke from the pipeline.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the present invention;

[0024] Figure 2 This is a schematic diagram of a three-dimensional structure of a section of a pipeline at position A of the present invention;

[0025] Figure 3 It is a schematic diagram of a partial cross-sectional three-dimensional structure of a pipeline A of the present invention;

[0026] Figure 4 It is a three-dimensional schematic diagram of the top view of the pipeline A of the present invention;

[0027] Figure 5 It is a schematic diagram of a partial cross-sectional three-dimensional structure of a pipeline B according to the present invention;

[0028] Figure 6 This is a schematic diagram of a three-dimensional cross-sectional structure of a pipeline at position B of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the dust cover of the present invention;

[0030] Figure 8 For the present invention Figure 3 A three-dimensional enlarged image of center A;

[0031] Fig. 9 For the present invention Figure 5 A three-dimensional enlarged view of B.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1. Ventilation device; 101. Pipe A; 102. Fixing frame; 103. Bolt; 104. Nut; 105. Pipe B; 2. Closing device; 201. Rotating rod A; 202. Torsion spring; 203. Fixing plate; 204. Screw rod; 205. Slide; 206. Block; 207. Spring A; 208. Rubber rod; 3. Alarm device; 301. Gear A; 302. Fixing rod; 303. Gear B; 3 04, rack; 305, push plate; 306, slide rail A; 307, slide rail B; 308, ball; 309, L-shaped slot; 310, alarm bell; 311, pressure block; 312, push rod; 313, spring B; 4, smoke exhaust device; 401, rotating shaft; 402, positioning rod A; 403, positioning rod B; 404, switch; 405, dust cover; 406, motor; 407, rotating rod B; 408, fan blade. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-9 The present invention is a locking mechanism for a high-sealing smoke exhaust fire damper, comprising a ventilation device 1, the ventilation device 1 comprising a pipe A101, a fixing frame 102 is fixedly sleeved on the outer surface of the pipe A101, a bolt 103 is passed through one side of the fixing frame 102, and is rotatably connected with the bolt 103, a nut 104 is threadedly connected to one end of the bolt 103 away from the fixing frame 102, and a pipe B105 is arranged on the side of the fixing frame 102 away from the pipe A101;

[0036] The ventilation device 1 is provided with a closing device 2 inside. The closing device 2 includes a rotating rod A201. One end of the rotating rod A201 passes through the top of the inner wall of the pipe A101 and is rotatably connected to the pipe A101. A torsion spring 202 is fixedly sleeved on the outer surface of the rotating rod A201. One end of the torsion spring 202 is fixedly connected to the bottom of the inner wall of the pipe A101. The other end of the torsion spring 202 is fixedly connected to the circumferential surface of the rotating rod A201. The fixed plate 203 and the inner wall of the pipe A101 are rotatably connected to a screw rod 204, a block 206 is fixedly connected to the circumferential surface of the screw rod 204, a slide groove 205 is provided on the inner wall of the pipe A101 close to the screw rod 204, a spring A207 is fixedly connected to the inner wall of the slide groove 205, one end of the spring A207 away from the inner wall of the slide groove 205 is fixedly connected to one side of the block 206, and one end of the inner wall of the pipe A101 away from the screw rod 204 is fixedly connected to a rubber rod 208.

[0037] There are two fixing frames 102, which are symmetrical along the vertical center axis of pipe A101. There are four bolts 103, which are arranged in groups of two and are symmetrical along the vertical center axis of the fixing frames 102. The above design is conducive to connecting pipe A101 and pipe B105 through the fixing frames 102 and bolts 103.

[0038] The end of the rubber rod 208 away from the pipe A101 contacts the fixed plate 203. There are two fixed plates 203, which are symmetrical along the vertical center axis of the rotating rod A201. The above design is conducive to the contact between the fixed plate 203 and the inner wall of the pipe A101, thereby blocking smoke and dust.

[0039] The ventilation device 1 is provided with an alarm device 3 inside, and the alarm device 3 includes a gear A301, an end of the rotating rod A201 away from the inner wall of the pipe A101 penetrates the gear A301 and is fixedly connected to the gear A301, a fixed rod 302 is fixedly connected to the top of the pipe A101, an end of the fixed rod 302 away from the pipe A101 penetrates the gear B303 and is rotatably connected to the gear B303, a rack 304 is slidably connected to the top of the pipe A101, a push plate 305 is fixedly connected to one side of the rack 304, and a slide rail A is provided on the top of the pipe A101. 306, a slide rail B307 is provided on the top of the pipe B105, a rolling ball 308 is arranged inside the slide rail A306, an L-shaped through groove 309 is provided on the inner wall of the slide rail B307, an alarm bell 310 is arranged on the inner wall of the L-shaped through groove 309, a spring B313 is fixedly connected to the side of the alarm bell 310 away from the L-shaped through groove 309, a pressure block 311 is fixedly connected to the end of the spring B313 away from the alarm bell 310, and a push rod 312 is fixedly connected to the side of the pressure block 311 close to the spring B313. The above design is conducive to the alarm effect when the pipeline temperature is too high.

[0040] The push rod 312 is located inside the spring B313, the alarm bell 310 is located on the displacement track of the push rod 312, and the side of the pressure block 311 away from the spring B313 is set as an inclined surface. The above design is conducive to driving the push rod 312 to knock the alarm bell 310 through the pressure block 311.

[0041] The slide rail A306 is interconnected with the slide rail B307 , the pressing block 311 is located on the displacement track of the rolling ball 308 , and the rolling ball 308 is located on the displacement track of the push plate 305 . The above design is conducive to pushing the rolling ball 308 through the push plate 305 , so that the rolling ball 308 squeezes the pressing block 311 .

[0042] A smoke exhaust device 4 is arranged inside the ventilation device 1, and the smoke exhaust device 4 includes a rotating shaft 401, which is rotatably connected to the top of the inner wall of the L-shaped through groove 309, a positioning rod A402 is fixedly connected to the circumferential surface of the rotating shaft 401, a positioning rod B403 is fixedly connected to the circumferential surface of the rotating shaft 401, a switch 404 is arranged on the inner wall of the L-shaped through groove 309, a dust cover 405 is fixedly connected to the top of the inner wall of the pipe B105, a motor 406 is fixedly connected to the top of the inner wall of the pipe B105, a rotating rod B407 is fixedly connected to the output shaft of the motor 406, a fan blade 408 is fixedly connected to the circumferential surface of the rotating rod B407, and the motor 406 is electrically connected to the switch 404. The above design is conducive to exhausting smoke from the pipe.

[0043] The positioning rod A402 is located between the pressing block 311 and the alarm bell 310, the positioning rod A402 is located on the displacement track of the pressing block 311, and the switch 404 is located on the displacement track of the positioning rod B403. The above design is conducive to squeezing the positioning rod A402 through the pressing block 311, so that the positioning rod A402 drives the positioning rod B403 to squeeze the switch 404 through the rotating shaft 401.

[0044] The motor 406 is located inside the dust cover 405. There are three fan blades 408 arranged in a circular array on the circumferential surface of the rotating rod B407. The fan blades 408 are located inside the dust cover 405. The above design is conducive to the high-speed rotation of the fan blades 408, thereby achieving the smoke exhaust effect.

[0045] Both sides of the inner wall of the pipe A101 are located on the displacement track of the fixed plate 203, the gear A301 is meshed with the gear B303, and the gear B303 is meshed with the rack 304. The above design is conducive to the rotation of the rotating rod A201, so that the rotating rod A201 drives the gear A301 to rotate, and then the gear A301 drives the gear B303 to rotate.

[0046] A specific application of this embodiment is: when the temperature of the pipeline is too high, the rubber rod 208 is melted and softened by high temperature, so that the fixed plate 203 is not subjected to force, and then the rotating rod A201 is rotated by the reset property of the torsion spring 202 on the rotating rod A201, so that the rotating rod A201 drives the fixed plate 203 to rotate, and then the fixed plate 203 and the inner wall of the pipeline A101 are in contact with each other, so as to achieve the effect of blocking smoke and dust, and prevent the fire from continuing to spread through the pipeline. When the rotating rod A201 rotates, the rotating rod A201 drives the gear A301 to rotate, so that the gear A301 drives the gear B303 to rotate, and then the gear B303 drives the rack 304 to move horizontally, so that the rack 304 drives the push plate 305 to push the ball 308 in the track A306, so that the ball 308 is pushed. 08 rolls along the tracks of the slide rails A306 and B307, so that the ball 308 squeezes the pressing block 311, and the pressing block 311 drives the push rod 312 to hit the alarm bell 310, and then performs a circular motion through the tracks of the slide rails A306 and B307 until the force disappears, thereby achieving the effect of alarm warning. When the pressing block 311 is subjected to the pressure of the ball 308, the pressing block 311 is forced to squeeze the positioning rod A402, so that the positioning rod A402 drives the positioning rod B403 to squeeze the switch 404 on the L-shaped through groove 309 through the rotating shaft 401, and the switch 404 is electrically connected to the motor 406, so that the motor 406 drives the rotating rod B407 to rotate, so that the rotating rod B407 drives the fan blades 408 thereon to rotate, and then the fan blades 408 rotate at high speed, thereby achieving the effect of exhausting smoke from the pipeline.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A locking mechanism for a high-sealing smoke exhaust fire damper, comprising a ventilation device (1), characterized in that: The ventilation device (1) comprises a pipe A (101), a fixing frame (102) being fixedly sleeved on the outer surface of the pipe A (101), a bolt (103) passing through one side of the fixing frame (102) and being rotatably connected to the bolt (103), a nut (104) being threadedly connected to one end of the bolt (103) away from the fixing frame (102), and a pipe B (105) being arranged on the side of the fixing frame (102) away from the pipe A (101); The ventilation device (1) is provided with a closing device (2) inside, the closing device (2) comprising a rotating rod A (201), one end of the rotating rod A (201) passing through the top of the inner wall of the pipe A (101) and being rotatably connected to the pipe A (101), a torsion spring (202) being fixedly sleeved on the outer surface of the rotating rod A (201), one end of the torsion spring (202) being fixedly connected to the bottom of the inner wall of the pipe A (101), the other end of the torsion spring (202) being fixedly connected to the circumferential surface of the rotating rod A (201), and a fixed spring (202) being fixedly connected to the circumferential surface of the rotating rod A (201). The plate (203) is rotatably connected to the inner wall of the pipe A (101) with a screw rod (204), a clamping block (206) is fixedly connected to the circumferential surface of the screw rod (204), a sliding groove (205) is provided on the inner wall of the pipe A (101) close to the screw rod (204), a spring A (207) is fixedly connected to the inner wall of the sliding groove (205), one end of the spring A (207) away from the inner wall of the sliding groove (205) is fixedly connected to one side of the clamping block (206), and one end of the inner wall of the pipe A (101) away from the screw rod (204) is fixedly connected to a rubber rod (208); An alarm device (3) is provided inside the ventilation device (1), and the alarm device (3) comprises a gear A (301). An end of the rotating rod A (201) away from the inner wall of the pipe A (101) passes through the gear A (301) and is fixedly connected to the gear A (301). A fixing rod (302) is fixedly connected to the top of the pipe A (101). An end of the fixing rod (302) away from the pipe A (101) passes through a gear B (303) and is rotatably connected to the gear B (303). A rack (304) is slidably connected to the top of the pipe A (101), and a push plate (305) is fixedly connected to one side of the rack (304). A slide rail A (306) is provided at the top of the pipe (101), a slide rail B (307) is provided at the top of the pipe B (105), a rolling ball (308) is arranged inside the slide rail A (306), an L-shaped through groove (309) is provided on the inner wall of the slide rail B (307), an alarm bell (310) is arranged on the inner wall of the L-shaped through groove (309), a spring B (313) is fixedly connected to the side of the alarm bell (310) away from the L-shaped through groove (309), a pressure block (311) is fixedly connected to the end of the spring B (313) away from the alarm bell (310), and a push rod (312) is fixedly connected to the side of the pressure block (311) close to the spring B (313); The ventilation device (1) is provided with a smoke exhaust device (4) inside, the smoke exhaust device (4) comprising a rotating shaft (401), the rotating shaft (401) being rotatably connected to the top of the inner wall of the L-shaped through groove (309), a positioning rod A (402) being fixedly connected to the circumferential surface of the rotating shaft (401), a positioning rod B (403) being fixedly connected to the circumferential surface of the rotating shaft (401), a switch (404) being provided on the inner wall of the L-shaped through groove (309), a dust cover (405) being fixedly connected to the top of the inner wall of the pipe B (105), a motor (406) being fixedly connected to the top of the inner wall of the pipe B (105), an output shaft of the motor (406) being fixedly connected to a rotating rod B (407), a fan blade (408) being fixedly connected to the circumferential surface of the rotating rod B (407), and the motor (406) being electrically connected to the switch (404); The positioning rod A (402) is located between the pressing block (311) and the alarm bell (310), the positioning rod A (402) is located on the displacement track of the pressing block (311), and the switch (404) is located on the displacement track of the positioning rod B (403); The motor (406) is located inside the dust cover (405), the number of the fan blades (408) is three, and they are arranged in a circumferential array on the circumferential surface of the rotating rod B (407), and the fan blades (408) are located inside the dust cover (405); Both sides of the inner wall of the pipe A (101) are located on the displacement track of the fixed plate (203), the gear A (301) and the gear B (303) are meshed with each other, and the gear B (303) and the rack (304) are meshed with each other.

2. The locking mechanism of a high-sealability smoke exhaust fire damper according to claim 1, characterized in that: The number of the fixing frames (102) is two, and they are symmetrical to each other along the vertical center axis of the pipeline A (101); the number of the bolts (103) is four, they are arranged in groups of two, and they are symmetrical to each other along the vertical center axis of the fixing frames (102).

3. The locking mechanism of a high-sealability smoke exhaust fire damper according to claim 2, characterized in that: One end of the rubber rod (208) away from the pipe A (101) contacts the fixing plate (203), and there are two fixing plates (203) which are symmetrical to each other along the vertical center axis of the rotating rod A (201).

4. The locking mechanism of a high-sealability smoke exhaust fire damper according to claim 3 is characterized in that: The push rod (312) is located inside the spring B (313), the alarm bell (310) is located on the displacement track of the push rod (312), and the side of the pressing block (311) away from the spring B (313) is arranged as an inclined surface.

5. The locking mechanism of a high-sealability smoke exhaust fire damper according to claim 4, characterized in that: The slide rail A (306) and the slide rail B (307) are interconnected, the pressing block (311) is located on the displacement track of the rolling ball (308), and the rolling ball (308) is located on the displacement track of the push plate (305).

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