A smoke exhaust fire damper for fire fighting that is easy to install

Abstract

The present invention discloses a smoke exhaust fire damper for fire fighting that is easy to install, and relates to the technical field of fire fighting equipment, including a valve body, an outer wall of the valve body is fixedly installed with a mounting seat, and the inner and outer walls of the valve body are fixedly penetrated with a driving mechanism, the driving mechanism includes a control module and an output module, the control end of the control module is rotatably installed with an operating rod, and the output end of the output module is fixedly installed with a valve disc, and the inner wall of the valve body is provided with a rectangular groove, wherein the expansion device includes a carrying block, a connecting rod, a docking frame, a columnar grip rod, a No. 1 spring, a limit plate, a limit frame, a T-shaped push rod and a No. 2 spring, the carrying block is fixedly penetrated through the inner and outer walls of the valve body, and a sliding groove is provided on the carrying block, when connecting through the valve body and the pipeline, the docking frame is first moved between the valve body and the pipeline, so that the docking frame transmits the supporting force to the valve body, so as to facilitate the connection of the valve body at a high place.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting equipment, in particular to a smoke exhaust fire damper for fire fighting which is easy to install. Background Art

[0002] Smoke exhaust fire damper is a key device used in fire control systems. Its main function is to help protect the safety of people and property in a building by controlling the spread of smoke and hot gases when a fire occurs.

[0003] The patent with patent announcement number CN212868655U relates to a fire-fighting smoke exhaust fire damper that is easy to install and belongs to the technical field of fire-fighting equipment. It includes a valve body, and retractable mounting rods are vertically arranged on both sides of the valve body. A mounting plate is horizontally arranged on the upper end of the mounting rod away from the valve body, and mounting bolts for fixing the mounting plate and the wall are threaded on the mounting plate, and a connecting piece for connecting the valve body to the pipe where the valve body needs to be installed is arranged on the valve body. This patent has the effect of facilitating the installation of the fire damper.

[0004] The above patent has the function of facilitating the installation of the fire damper by horizontally arranging a mounting plate on the upper side of the end of the mounting rod away from the valve body, threadedly passing mounting bolts for fixing the mounting plate and the wall, and the valve body is provided with a connector for connecting the valve body to the pipe where the valve body needs to be installed, so as to facilitate the installation by the operator. However, when installing the fire damper, the pipe is installed at a high place, and the operator needs to vacate the fire damper for installation, and vacating the fire damper will increase instability. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a smoke exhaust fire damper for fire fighting that is easy to install, solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a fire-fighting smoke exhaust fire damper that is easy to install, comprising a valve body, a mounting seat is fixedly installed on the outer wall of the valve body, a driving mechanism is fixedly penetrated through the inner and outer walls of the valve body, the driving mechanism comprises a control module and an output module, an operating rod is rotatably installed on the control end of the control module, a valve disc is fixedly installed on the output end of the output module, a rectangular groove is provided on the inner wall of the valve body, wherein the expansion device comprises a carrying block, a connecting rod, a docking frame, a columnar grip rod, a No. 1 spring, a limit plate, a limit frame, a T-shaped push rod and a No. 2 spring, the T-shaped push rod is pulled to move upward, the T-shaped push rod stretches the No. 2 spring when moving, and the No. 2 spring is stretched The cam is provided with a sliding groove, the connecting rod is slidably mounted on the inner wall of the sliding groove, the docking frame is fixedly mounted on the end of the connecting rod away from the valve disc, the cylindrical gripping rod slides through the end of the connecting rod away from the docking frame, a No. 1 spring is arranged between the cylindrical gripping rod and the connecting rod, the limit plate is fixedly mounted on the circumferential surface of the cylindrical gripping rod, pushing the cylindrical gripping rod to move toward the docking frame, and the movement of the cylindrical gripping rod drives the limit plate to move toward the docking frame, the limit frame is fixedly mounted on a side wall of the carrying block close to the limit plate, the T-shaped push rod slides through the top of the limit frame, and a No. 2 spring is arranged between the T-shaped push rod and the limit frame.

[0007] According to the above technical solution, the docking frame contacts the inner wall of the valve body, the limit plate contacts the inner wall of the limit frame, and the limit plate separates from the contact surface of the limit frame when moving, so that the limit imposed by the limit frame on the connecting rod is released.

[0008] According to the above technical solution, a circular groove is opened on the top of the limit plate, and the T-shaped push rod contacts the inner wall of the circular groove. The surface of the T-shaped push rod in contact with the circular groove is separated during movement, so that the limit imposed by the T-shaped push rod on the cylindrical handle is released.

[0009] According to the above technical scheme, the stabilizing device includes a loading box, a lifting plate, a fixed block, a bending piece, a connecting block, a round rod, a contact piece and a blocking piece. When the docking frame moves, the loading box is driven to move in a direction away from the valve body, and the movement of the loading box drives the lifting plate away from the valve body. The loading box is fixedly penetrated through the outer wall of the docking frame, the lifting plate is slidably installed on the inner wall of the loading box, the fixed block is fixedly installed on the top of the inner wall of the loading box, the bending piece is fixedly installed on the bottom of the fixed block, one end of the bending piece away from the fixed block is fixedly installed on the top of the lifting plate, the bending piece is in a deformed state, and the deformed bending piece applies pressure to the lifting plate under the action of its own elasticity, the connecting block is fixedly installed on the bottom of the lifting plate, the round rod is rotatably installed on one side wall of the connecting block, the contact piece is fixedly installed on the inner wall of the lifting plate away from the bending piece, the blocking piece is fixedly installed on the inner side wall of the loading box close to the contact piece, the bending piece itself has elasticity, and the round rod is in contact with the inner wall of the valve body.

[0010] According to the above technical solution, the surface of the contact piece close to the blocking piece is provided with an arc surface 1, and the arc surface 1 of the contact piece contacts the top of the blocking piece during movement, so that the contact piece continues to move and is subject to resistance exerted by the blocking piece. The contact piece itself is elastic, and the contact piece is deformed due to the influence of the resistance, and the deformed contact piece stores energy under the action of its own elasticity.

[0011] According to the above technical solution, the pushing device includes a hollow box, a hollow cylinder, a telescopic rod, a No. 3 spring, a push plate, a rectangular block, a stop plate and a short block. The squeezed No. 3 spring is restored. The No. 3 spring applies a thrust to the telescopic rod during the restoration process. The telescopic rod moves toward the push plate under the influence of the thrust. The hollow box is fixedly mounted on the inner wall of the rectangular groove, the hollow cylinder is fixedly mounted on the inner wall of the hollow box, the telescopic rod slides through the end of the hollow cylinder away from the hollow box, a No. 3 spring is arranged between the telescopic rod and the hollow cylinder, and the push plate is fixedly mounted on the end of the telescopic rod away from the hollow box. At one end of the core cylinder, the rectangular block is fixedly installed on the circumferential surface of the telescopic rod, the rectangular block slides and penetrates the inner and outer walls of the hollow cylinder, the abutment plate slides and penetrates the end of the rectangular block away from the telescopic rod, and the short block is fixedly installed on the inner wall of the hollow box away from the hollow cylinder. When the telescopic rod moves, the rectangular block is driven to move in the direction close to the short block, and the movement of the rectangular block drives the abutment plate to move in the direction of the short block. The push plate contacts the rectangular groove, and the push plate contacts the surface of the docking frame close to the valve disc. The push plate continues to move to apply thrust to the docking frame, and the docking frame is affected by the thrust and moves in the direction away from the valve body.

[0012] According to the above technical solution, an arc surface 2 is provided at one end of the support plate close to the short block, and an inclined surface 1 is provided at one end of the short block close to the support plate. The arc surface 2 of the support plate contacts the inclined surface 1 of the short block during movement, so that the support plate continues to move and is guided by the inclined surface 1 toward the rectangular block.

[0013] According to the above technical solution, a spring sheet is arranged between the resisting plate and the rectangular block. The resisting plate squeezes the spring sheet when moving, and the spring sheet is deformed by the squeezing. The deformed spring sheet applies a reaction force to the resisting plate. A corrugation 1 is provided on the surface of the resisting plate away from the rectangular block. Friction is generated between the corrugation 1 and the short block when the corrugation 1 moves, and the moving speed of the resisting plate is slowed down by the influence of the friction force.

[0014] The present invention provides a smoke exhaust fire damper for fire fighting that is easy to install. It has the following beneficial effects:

[0015] (1) The smoke exhaust fire damper for fire fighting, which is easy to install, has a separation of the contact surface between the limit plate and the limit frame, so that the limit imposed on the connecting rod by the limit frame is released. By performing double limit on the movement of the connecting rod, it is ensured that the operator can move the connecting rod only after standardized operation, thereby reducing the safety risks caused by accidental touch and effectively improving the standardization of work. The docking frame contacts the inner wall of the pipeline during movement, so that the docking frame is supported by the pipeline. When connecting the valve body and the pipeline, the docking frame is first moved between the valve body and the pipeline, so that the docking frame transmits the supporting force to the valve body, which is convenient for the valve body to be connected at a high place.

[0016] (2) The fire-fighting smoke exhaust fire damper is easy to install. The pressure exerted by the bent piece is transmitted to the round rod. The round rod is affected by the pressure and is in close contact with the inner wall of the pipe. The round rod automatically adjusts its own height when facing pipes of different specifications, and exerts thrust on the inner wall of the pipe under the influence of the pressure of the bent piece to improve stability and applicability of the round rod. The contact piece recovers under the action of its own elasticity. During the recovery process, the contact piece collides with the blocking piece to generate vibration. The vibration generated by the collision between the contact piece and the blocking piece can avoid the lifting plate from getting stuck when automatically adjusting the height, thereby ensuring the smooth progress of the work.

[0017] (3) The push plate applies thrust to the docking frame, which is easy to install. The docking frame moves away from the valve body under the influence of the thrust. After the limit of the connecting rod is correctly released, the push plate automatically applies thrust to the docking frame, which is convenient for operators to carry out connection work at high places, thereby improving work efficiency. Friction is generated between the movement of the corrugation and the short block, and the movement speed of the abutment plate is slowed down by the friction. The push plate pushes the docking frame to move a safe distance and then slows down, avoiding the rapid movement of the docking frame and the collision of the pipeline, effectively improving the safety during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall half-section structure of the present invention;

[0020] Figure 3This is a schematic diagram of the valve flap and driving mechanism structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the internal structure of the unfolding device and the stabilizing device of the present invention;

[0022] Figure 5 For the present invention Figure 4 The structure diagram of the enlarged figure at A in the middle;

[0023] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0024] Figure 7 This is a schematic diagram of the internal structure of the pushing device of the present invention;

[0025] Figure 8 This is a schematic diagram of the position structure of spring No. 3 of the present invention.

[0026] In the figure: 1. valve body; 2. mounting seat; 3. driving mechanism; 4. operating lever; 5. valve disc; 61. carrying block; 62. connecting rod; 63. docking frame; 64. cylindrical grip; 65. No. 1 spring; 66. limit plate; 67. limit frame; 68. T-shaped push rod; 69. No. 2 spring; 71. loading box; 72. lifting plate; 73. fixing block; 74. bending piece; 75. connecting block; 76. round rod; 77. contact piece; 78. blocking piece; 81. hollow box; 82. hollow cylinder; 83. telescopic rod; 84. No. 3 spring; 85. push plate; 86. rectangular block; 87. stop plate; 88. short block. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-Figure 5, one embodiment of the present invention is: a smoke exhaust fire damper for fire fighting that is easy to install, comprising a valve body 1, a mounting seat 2 is fixedly installed on the outer wall of the valve body 1, a driving mechanism 3 is fixedly penetrated through the inner and outer walls of the valve body 1, the driving mechanism 3 comprises a control module and an output module, an operating rod 4 is rotatably installed on the control end of the control module, a valve flap 5 is fixedly installed on the output end of the output module, a rectangular groove is provided on the inner wall of the valve body 1, and an expansion device is also included; wherein the expansion device comprises a carrying block 61, a connecting rod 62, a docking frame 63, a columnar gripping rod 64, a No. 1 spring 65, a limiting plate 66, a limiting frame 67, a T-shaped push rod 68 and a No. 2 spring 69, the carrying block 61 is fixedly penetrated through the inner and outer walls of the valve body 1, a sliding groove is provided on the carrying block 61, and the connecting rod 62 It is slidably installed on the inner wall of the slide groove, and the docking frame 63 is fixedly installed on the end of the connecting rod 62 away from the valve disc 5. The cylindrical grip rod 64 slides through the end of the connecting rod 62 away from the docking frame 63. A No. 1 spring 65 is arranged between the cylindrical grip rod 64 and the connecting rod 62. The limit plate 66 is fixedly installed on the circumferential surface of the cylindrical grip rod 64. The limit frame 67 is fixedly installed on the side wall of the mounting block 61 close to the limit plate 66. The T-shaped push rod 68 slides through the top of the limit frame 67. A No. 2 spring 69 is arranged between the T-shaped push rod 68 and the limit frame 67. When connecting the valve body 1 and the pipeline, the docking frame 63 is first moved between the valve body 1 and the pipeline, so that the docking frame 63 transmits the supporting force applied by the pipeline to the valve body 1, which is convenient for the valve body 1 to be connected.

[0029] The docking frame 63 contacts the inner wall of the valve body 1, and the limit plate 66 contacts the inner wall of the limit frame 67. By applying a limit to the connecting rod 62, shaking during transportation is avoided to release the limit of the connecting rod 62, thereby ensuring safety during movement.

[0030] A circular groove is formed on the top of the limiting plate 66, and the T-shaped push rod 68 contacts the inner wall of the circular groove. By performing double limiting on the movement of the connecting rod 62, it is ensured that the operator can move the connecting rod 62 only after standardized operation, thereby improving the standardization of the work.

[0031] When the present embodiment is working, when the valve body 1 is connected to the pipeline, one end of the valve body 1 close to the docking frame 63 is brought into contact with the pipeline to be docked, and the T-shaped push rod 68 is pulled to move upward. The T-shaped push rod 68 stretches the No. 2 spring 69 when moving, and the No. 2 spring 69 is deformed by being stretched. At the same time, the surface of the T-shaped push rod 68 in contact with the circular groove is separated during the movement, so that the limit imposed by the T-shaped push rod 68 on the columnar grip rod 64 is released, and the columnar grip rod 64 is pulled to move in the direction away from the connecting rod 62. The columnar grip rod 64 stretches the No. 1 spring 65 when moving, and the No. 1 spring 65 is stretched and deformed. At the same time, the movement of the columnar grip rod 64 drives the limit plate 66 to move in the direction away from the carrying block 61, and the limit plate 66 is separated from the surface in contact with the limit frame 67 when moving, so that the limit imposed by the limit frame 67 on the connecting rod 62 is released. By performing double limit on the movement of the connecting rod 62, it is ensured that the operator can move the connecting rod 62 only after standardized operation, thereby improving the High work standardization, push the columnar grip 64 to move in the direction of the docking frame 63, the movement of the columnar grip 64 drives the limit plate 66 to move in the direction of the docking frame 63, after the limit plate 66 moves to the specified position, release the T-shaped push rod 68, the deformed No. 2 spring 69 recovers and drives the T-shaped push rod 68 to move downward to the initial position, and the pulling force applied to the columnar grip 64 gradually decreases, so that the deformed No. 1 spring 65 recovers and drives the columnar grip 64 to move in the direction of the connecting rod 62 to the initial position, and continues to push the columnar grip 64 to move in the direction of the docking frame 63, the movement of the columnar grip 64 drives the connecting rod 62 to move in the direction of the docking frame 63, and the movement of the connecting rod 62 drives the docking frame 63 to move away from the valve body 1. The docking frame 63 contacts the inner wall of the pipeline during the movement, so that the docking frame 63 is supported by the pipeline. When connecting the valve body 1 and the pipeline, the docking frame 63 is first moved between the valve body 1 and the pipeline to facilitate the connection of the valve body 1.

[0032] See also Figure 1-Figure 8On the basis of the above embodiment, another embodiment of the present invention further includes a stabilizing device and a pushing device; the stabilizing device includes a loading box 71, a lifting plate 72, a fixing block 73, a bending piece 74, a connecting block 75, a round rod 76, a contact piece 77 and a blocking piece 78, the loading box 71 is fixedly penetrated through the outer wall of the docking frame 63, the lifting plate 72 is slidably mounted on the inner wall of the loading box 71, the fixing block 73 is fixedly mounted on the top of the inner wall of the loading box 71, the bending piece 74 is fixedly mounted on the bottom of the fixing block 73, and one end of the bending piece 74 away from the fixing block 73 is fixedly mounted on the top of the lifting plate 72, The connecting block 75 is fixedly mounted on the bottom of the lifting plate 72, the round rod 76 is rotatably mounted on one side wall of the connecting block 75, the contact piece 77 is fixedly mounted on the inner wall of the lifting plate 72 away from the bending piece 74, the blocking piece 78 is fixedly mounted on the inner wall of the loading box 71 close to the contact piece 77, the bending piece 74 itself is elastic, the round rod 76 contacts the inner wall of the valve body 1, and the round rod 76 moves and contacts the inner wall of the pipe, so that the round rod 76 can automatically adjust its position when facing pipes of different specifications, and exert thrust on the inner wall of the pipe under the influence of the pressure of the bending piece 74, thereby improving the applicability of the round rod 76.

[0033] The contact piece 77 has an arc surface near the blocking piece 78. The contact piece 77 itself is elastic. Vibration is generated by the collision between the contact piece 77 and the blocking piece 78 to prevent the lifting plate 72 from getting stuck when automatically adjusting the height, thereby ensuring stability during operation.

[0034] The pushing device includes a hollow box 81, a hollow cylinder 82, a telescopic rod 83, a No. 3 spring 84, a push plate 85, a rectangular block 86, a stop plate 87 and a short block 88. The hollow box 81 is fixedly mounted on the inner wall of the rectangular groove, the hollow cylinder 82 is fixedly mounted on the inner wall of the hollow box 81, the telescopic rod 83 slides through the end of the hollow cylinder 82 away from the hollow box 81, a No. 3 spring 84 is arranged between the telescopic rod 83 and the hollow cylinder 82, the push plate 85 is fixedly mounted on the end of the telescopic rod 83 away from the hollow cylinder 82, the rectangular block 86 It is fixedly installed on the circumferential surface of the telescopic rod 83, the rectangular block 86 slides through the inner and outer walls of the hollow cylinder 82, the butt plate 87 slides through the end of the rectangular block 86 away from the telescopic rod 83, and the short block 88 is fixedly installed on the inner wall of the hollow box 81 away from the hollow cylinder 82. The push plate 85 contacts the rectangular groove, and the push plate 85 contacts the surface of the docking frame 63 close to the valve disc 5. After the limit of the connecting rod 62 is correctly released, the push plate 85 applies thrust to the docking frame 63, which is convenient for the operator to perform the connection work, thereby improving work efficiency.

[0035] An arc surface 2 is provided at one end of the support plate 87 close to the short block 88, and an inclined surface 1 is provided at one end of the short block 88 close to the support plate 87. By providing the arc surface 2 and the inclined surface 1, it is ensured that after the support plate 87 and the short block 88 come into contact, they can move smoothly toward the rectangular block 86, effectively improving the stability during operation.

[0036] A spring sheet is arranged between the abutment plate 87 and the rectangular block 86, and a corrugation is provided on the surface of the abutment plate 87 away from the rectangular block 86. The push plate 85 pushes the docking frame 63 to move a safe distance and then decelerates, thereby preventing the docking frame 63 from moving quickly and colliding with the pipeline, thereby effectively improving the safety during installation.

[0037] When the present embodiment is working, the bending piece 74 is in a deformed state. The deformed bending piece 74 applies pressure to the lifting plate 72 under the action of its own elasticity. When the docking frame 63 moves, the loading box 71 is driven to move away from the valve body 1. The loading box 71 moves and drives the lifting plate 72 away from the valve body 1. The lifting plate 72 moves and drives the connecting block 75 away from the valve body 1. The connecting block 75 moves and drives the round rod 76 away from the valve body 1. The round rod 76 is separated from the contact surface of the valve body 1 during the movement, so that the deformed bending piece 74 recovers and drives the lifting plate 72 to move away from the fixed block 73. The lifting plate 72 moves and drives the connecting block 75 away from the fixed block 73. The connecting block 75 moves and drives the round rod 76 away from the fixed block 73. The round rod 76 contacts the inner wall of the pipe during the movement, so that the pressure applied by the deformed bending piece 74 is transmitted. The round rod 76 is provided, and the round rod 76 is in close contact with the inner wall of the pipe under the influence of pressure. The movable round rod 76 contacts the inner wall of the pipe, and a thrust is applied to the inner wall of the pipe under the influence of pressure from the bending piece 74, thereby improving the applicability of the round rod 76. The movement of the lifting plate 72 drives the contact piece 77 to move downward. The arc surface 1 of the contact piece 77 contacts the top of the blocking piece 78 during the movement, so that the contact piece 77 continues to move and is subject to resistance applied by the blocking piece 78. The contact piece 77 is deformed under the influence of resistance. The deformed contact piece 77 stores energy under the action of its own elasticity. When the arc surface 1 and the contact surface of the blocking piece 78 are separated, the deformed contact piece 77 is restored under the action of its own elasticity. During the restoration process, the contact piece 77 collides with the second blocking piece 78 to generate vibration. Vibration is generated by the collision between the contact piece 77 and the blocking piece 78, thereby preventing the lifting plate 72 from getting stuck when the height is automatically adjusted.

[0038] After the limit of the connecting rod 62 is released, the squeezed No. 3 spring 84 recovers. During the recovery process, the No. 3 spring 84 applies a thrust to the telescopic rod 83. The telescopic rod 83 moves toward the push plate 85 under the influence of the thrust. The movement of the telescopic rod 83 drives the push plate 85 to move away from the hollow cylinder 82. When moving, the push plate 85 contacts the surface of the docking frame 63 close to the hollow box 81, so that the push plate 85 continues to move and applies a thrust to the docking frame 63. The docking frame 63 moves away from the valve body 1 under the influence of the thrust. After the limit of the connecting rod 62 is correctly released, the push plate 85 applies a thrust to the docking frame 63, which is convenient for the operator to carry out the connection work, thereby improving the work efficiency. The telescopic rod 83 moves while driving the rectangular block 86 to move in the direction close to the short block 88. The movement of the rectangular block 86 drives the abutment plate 87 to move in the direction of the short block 88. The arc surface 2 of the abutment plate 87 contacts the inclined surface 1 of the short block 88 during the movement, so that the abutment plate 87 continues to move and is guided by the inclined surface 1 to move in the direction of the rectangular block 86. The abutment plate 87 squeezes the spring sheet when moving, and the spring sheet is deformed by the squeezing. The deformed spring sheet applies a reaction force to the abutment plate 87. The corrugation 1 of the abutment plate 87 is in close contact with the outer wall of the short block 88 under the influence of the reaction force, so that friction is generated between the movement of the corrugation 1 and the short block 88. The movement speed of the abutment plate 87 is slowed down by the friction force, and the push plate 85 pushes the docking frame 63 to move a safe distance and then decelerates, so as to avoid the rapid movement of the docking frame 63 and the collision with the pipeline, thereby effectively improving the safety during installation.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smoke exhaust fire damper for fire fighting which is easy to install, comprising a valve body (1), characterized in that: The outer wall of the valve body (1) is fixedly mounted with a mounting seat (2), the inner and outer walls of the valve body (1) are fixedly penetrated with a driving mechanism (3), the driving mechanism (3) comprises a control module and an output module, the control end of the control module is rotatably mounted with an operating rod (4), the output end of the output module is fixedly mounted with a valve flap (5), the inner wall of the valve body (1) is provided with a rectangular groove, and further comprises an expansion device, a stabilizing device and a pushing device; The deployment device comprises a carrying block (61), a connecting rod (62), a docking frame (63), a columnar gripping rod (64), a first spring (65), a limit plate (66), a limit frame (67), a T-shaped push rod (68) and a second spring (69), wherein the carrying block (61) is fixedly passed through the inner and outer walls of the valve body (1), a slide groove is provided on the carrying block (61), the connecting rod (62) is slidably mounted on the inner wall of the slide groove, the docking frame (63) is fixedly mounted on one end of the connecting rod (62) away from the valve disc (5), and the columnar gripping rod (64) is slidably passed through the end of the connecting rod (62) away from the valve disc (5). At one end away from the docking frame (63), a first spring (65) is arranged between the cylindrical gripping rod (64) and the connecting rod (62), the limiting plate (66) is fixedly mounted on the circumferential surface of the cylindrical gripping rod (64), the limiting frame (67) is fixedly mounted on a side wall of the mounting block (61) close to the limiting plate (66), the T-shaped push rod (68) slides through the top of the limiting frame (67), a second spring (69) is arranged between the T-shaped push rod (68) and the limiting frame (67), a circular groove is opened on the top of the limiting plate (66), and the T-shaped push rod (68) contacts the inner wall of the circular groove; The stabilizing device comprises a loading box (71), a lifting plate (72), a fixing block (73), a bending piece (74), a connecting block (75), a round rod (76), a contact piece (77) and a blocking piece (78); the loading box (71) is fixedly connected to the outer wall of the docking frame (63); the lifting plate (72) is slidably mounted on the inner wall of the loading box (71); the fixing block (73) is fixedly mounted on the top of the inner wall of the loading box (71); the bending piece (74) is fixedly mounted on the bottom of the fixing block (73); and the bending piece (74) is far away from the loading box (71). One end of the fixed block (73) is fixedly mounted on the top of the lifting plate (72), the connecting block (75) is fixedly mounted on the bottom of the lifting plate (72), the round rod (76) is rotatably mounted on a side wall of the connecting block (75), the contact piece (77) is fixedly mounted on the inner wall of the lifting plate (72) away from the bending piece (74), the blocking piece (78) is fixedly mounted on the inner wall of the loading box (71) close to the contact piece (77), the bending piece (74) itself is elastic, and the round rod (76) is in contact with the inner wall of the valve body (1); The pushing device comprises a hollow box (81), a hollow cylinder (82), a telescopic rod (83), a No. 3 spring (84), a push plate (85), a rectangular block (86), a stop plate (87) and a short block (88), wherein the hollow box (81) is fixedly mounted on the inner wall of the rectangular groove, the hollow cylinder (82) is fixedly mounted on the inner wall of the hollow box (81), the telescopic rod (83) slides through one end of the hollow cylinder (82) away from the hollow box (81), a No. 3 spring (84) is arranged between the telescopic rod (83) and the hollow cylinder (82), and the push plate (85) is provided with a plurality of springs. 5) is fixedly mounted on the end of the telescopic rod (83) away from the hollow cylinder (82), the rectangular block (86) is fixedly mounted on the circumferential surface of the telescopic rod (83), the rectangular block (86) slides through the inner and outer walls of the hollow cylinder (82), the stop plate (87) slides through the end of the rectangular block (86) away from the telescopic rod (83), the short block (88) is fixedly mounted on the inner wall of the hollow box (81) away from the hollow cylinder (82), the push plate (85) contacts the rectangular groove, and the push plate (85) contacts the surface of the docking frame (63) close to the valve disc (5).

2. The smoke exhaust fire damper for fire fighting which is easy to install according to claim 1 is characterized in that: The docking frame (63) contacts the inner side wall of the valve body (1), and the limiting plate (66) contacts the inner side wall of the limiting frame (67).

3. The smoke exhaust fire damper for firefighting that is easy to install according to claim 1 is characterized in that: The surface of the contact piece (77) close to the blocking piece (78) is provided with an arc surface 1, and the contact piece (77) itself is elastic.

4. The smoke exhaust fire damper for fire fighting which is easy to install according to claim 1 is characterized in that: An end of the abutment plate (87) close to the short block (88) is provided with a second arc surface, and an end of the short block (88) close to the abutment plate (87) is provided with a first inclined surface.

5. The smoke exhaust fire damper for fire fighting which is easy to install according to claim 4 is characterized in that: A spring sheet is provided between the abutment plate (87) and the rectangular block (86), and a corrugated surface is provided on the surface of the abutment plate (87) away from the rectangular block (86).

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