CN114396222B

CN114396222B - Fireproof door device for pipe gallery

Info

Publication number: CN114396222B
Application number: CN202210055072.0A
Authority: CN
Inventors: 顾志良
Original assignee: Zhejiang Tianyuan Door Industry Co ltd
Current assignee: Zhejiang Tianyuan Door Industry Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2023-07-14
Anticipated expiration: 2042-01-18
Also published as: CN114396222A

Abstract

The invention discloses a fireproof door device for a pipe gallery, which relates to the technical field of pipe gallery fire-fighting devices and comprises a fireproof frame body, wherein the front surface of the fireproof frame body is rotationally connected with a fireproof door body, extension strips are fixedly welded at the top and the bottom of the fireproof frame body, a quick escape mechanism is arranged at the front surface of the fireproof door body, a self-closing ventilation mechanism is arranged at the front surface of the extension strip, and a water adding protection mechanism is arranged at the top of the extension strip. According to the invention, ventilation treatment can be carried out on the interior of the pipe gallery through the operation of the exhaust fan, the fire condition is monitored through the operation of the smoke sensor according to the air smoke content, if the fire condition occurs, the stepping motor is immediately controlled to operate, the rotating seat is driven to rotate through the transmission of the second gear and the first gear, the sealing circular plate is driven to rotate around the circle center of the front face of the first gear by a certain angle, the sealing circular plate seals the ventilation circular groove, and the problem that the smoke spreads through the inner cavity of the ventilation drum is avoided.

Description

Fireproof door device for pipe gallery

Technical Field

The invention relates to a fireproof door device, relates to the technical field of pipe gallery fire-fighting devices, and particularly relates to a fireproof door device for a pipe gallery.

Background

The pipe gallery fireproof door device is a door capable of meeting the requirements of fire resistance stability, integrity and heat insulation in a certain time, is a fireproof partition with certain fire resistance, such as a fireproof partition area, an evacuation stairwell, a vertical shaft and the like, has the function of a common door, has the function of preventing fire from spreading and smoke from spreading, and can prevent the fire from spreading in a certain time, so that people are ensured to evacuate. The following problems exist in the prior art:

1. the existing fireproof door does not have the function of automatically sealing the ventilation position, the ventilation position is required to be set for ventilation in daily use, if a fire occurs, the ventilation position is not closed in time, smoke can spread through the ventilation position, and the fireproof effect of the fireproof door is affected;

2. the existing fireproof door does not have the function of quick door breaking, if the door lock is damaged when a fire occurs, the fire door cannot be broken by a human body to escape, personal safety of nearby people can be threatened, and improvement is needed.

Disclosure of Invention

The invention provides a fireproof door device for a pipe gallery, which aims to automatically seal a ventilation place and solve the problem that smoke can spread through the ventilation place; the other purpose is to solve the problem that when the door lock is damaged, the fire door cannot be damaged by a human body to escape, so that the effect of being convenient for people to quickly break the door to escape is achieved.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a prevent fire door device for piping lane, includes the fire prevention framework, the front rotation of fire prevention framework is connected with prevents fire door body, the equal fixed welding in top and bottom of fire prevention framework has the extension, prevent fire door body's front is provided with quick escape mechanism, the front of extension is provided with self-closing ventilation mechanism, the top of extension is provided with water protection mechanism.

The self-closing ventilation mechanism comprises a ventilation drum, the ventilation drum is fixedly arranged on the front face of the extension strip, an exhaust fan is fixedly arranged in the inner cavity of the ventilation drum, a smoke sensor is fixedly arranged at the top of the inner cavity of the ventilation drum, a self-closing disc is fixedly arranged in the inner cavity of the ventilation drum, and a metal protection net is detachably connected in the inner cavity of the ventilation drum.

The water adding protection mechanism comprises a top strip, the top strip is fixedly arranged at the top of the extension strip, a water passing groove is formed in the top strip, bent pipes are fixedly connected to the front face and the back face of the top strip, an inclined spray head is fixedly connected to the bottom of each bent pipe, a connecting frame is fixedly arranged on the back face of the top strip, and a water storage barrel is fixedly arranged on the back face of the connecting frame.

The quick escape mechanism comprises an embedded ring, the embedded ring is fixedly arranged on the front side of a fireproof door body, warning lamps are fixedly arranged on the front side and the back side of the embedded ring, a toughened glass ring is fixedly connected to the inner wall of the embedded ring, a partition plate is fixedly connected to the inner wall of the toughened glass ring, a control box is fixedly arranged on the front side and the back side of the partition plate, warning tags are fixedly arranged on the front side and the back side of the partition plate, a gas generator body is arranged in an inner cavity of the partition plate, and a fixed cylinder is fixedly arranged on the inner wall of the embedded ring.

The technical scheme of the invention is further improved as follows: the front of the self-closing disk is provided with a ventilation circular groove, the front of the self-closing disk is rotationally connected with a rotating seat, a closed circular plate is fixedly installed on the outer wall of the rotating seat, a first gear is fixedly installed on the front of the rotating seat, a stepping motor is arranged in an inner cavity of the self-closing disk, an output shaft of the stepping motor extends to the outer surface of the self-closing disk and is fixedly connected with a second gear, and the outer wall of the first gear is meshed with the outer wall of the second gear.

The technical scheme of the invention is further improved as follows: the bottom of ventilation tube inner chamber is provided with reserve monitoring mechanism, reserve monitoring mechanism includes the underframe, underframe fixed mounting is in the bottom of ventilation tube inner chamber, the bottom fixed mounting of underframe inner chamber has trigger button, the top fixed mounting of underframe has the bent lever, the one end fixedly connected with graphite pole that the bent lever kept away from the underframe.

The technical scheme of the invention is further improved as follows: the graphite rod is characterized in that graphite ring fins are fixedly connected to the outer wall of the graphite rod, low-melting-point alloy wires are movably connected to the outer wall of the graphite rod, a pressing sliding plate is fixedly arranged at the bottom of each low-melting-point alloy wire, and the pressing sliding plate is slidably connected in an inner cavity of the bottom frame.

The technical scheme of the invention is further improved as follows: the water pump is characterized in that a sealing box is fixedly arranged at the bottom of the inner cavity of the water storage barrel, a water pump is fixedly arranged at the bottom of the inner cavity of the sealing box, an input pipe of the water pump extends to the bottom of the sealing box, and an output pipe of the water pump extends to the front surface of the water storage barrel and is fixedly connected with a metal water pipe.

The technical scheme of the invention is further improved as follows: one end of the metal water pipe, which is far away from the water suction pump, is fixedly connected with the back surface of the top strip, the top of the sealing box is detachably connected with a sealing cover, and a storage battery is detachably connected in the inner cavity of the sealing box.

The technical scheme of the invention is further improved as follows: the inner cavity of the fixed cylinder is slidably connected with sliding broken blocks, the inner cavity of the partition plate is fixedly provided with a gas storage cylinder body, the output end of the gas storage cylinder body is fixedly connected with an electromagnetic valve, and one end of the electromagnetic valve, which is far away from the gas storage cylinder body, is fixedly connected with a flow distribution disc.

The technical scheme of the invention is further improved as follows: the top fixedly connected with of flow distribution plate connects the trachea, the one end that the flow distribution plate was kept away from to connect the trachea is fixed with the outer wall fixed connection of fixed section of thick bamboo, the output tube of gas generator body is fixed with the input of the gas storage jar body.

By adopting the technical scheme, compared with the prior art, the invention has the following technical progress:

1. the invention provides a fireproof door device for a pipe gallery, which adopts the combination of a smoke sensor, a stepping motor, a ventilation circular groove and a closed circular plate, can perform ventilation treatment on the interior of the pipe gallery through the operation of an exhaust fan, monitors fire conditions according to the content of air smoke through the operation of the smoke sensor, immediately controls the stepping motor to operate if the fire conditions occur, drives a rotating seat to rotate through the transmission of a second gear and a first gear, promotes the closed circular plate to rotate a certain angle around the center of the front surface of the first gear, closes the ventilation circular groove through the closed circular plate, avoids the problem that smoke spreads through the inner cavity of a ventilating drum, ensures the fireproof effect of a fireproof door body and improves the safety of the device.

2. The invention provides a fireproof door device for a pipe gallery, which adopts the combination of a gas generator body, a gas storage tank body, an electromagnetic valve, a flow dividing disc, a fixed cylinder and sliding broken fragments, when a door lock is damaged, a control box can control a quick escape mechanism to integrally operate, firstly, the gas generator body works, gas is conveyed into an inner cavity of the gas storage tank body through an output pipe of the gas generator body, the electromagnetic valve is controlled to be opened after the gas is conveyed for a period of time, high-pressure gas in the inner cavity of the gas storage tank body can flow into the inner cavity of the fixed cylinder through the flow dividing disc and a connecting air pipe, the sliding broken fragments are driven to slide out of the inner cavity of the fixed cylinder by the pushing of the air pressure, then the tempered glass ring is damaged by the sliding broken fragments which move quickly, and then a baffle plate is pushed away, so that the problem that a person cannot escape from the fireproof door is avoided when the door lock is damaged, the safety of nearby personnel is provided, and the safety of the device is improved.

3. The invention provides a fireproof door device for a pipe gallery, which adopts the combination of a sealing box, a water pump, a metal water pipe, an elbow pipe and an inclined spray head, when a fire occurs, the water pump is controlled to work, water in the inner cavity of a water storage barrel is pumped and conveyed into the inner cavity of a water passing trough through the metal water pipe, then the water is sprayed to the surface of a fireproof door body through the inclined spray head at the bottom of the elbow pipe, a layer of water curtain is formed on the surface of the fireproof door body, the fire is relieved, more escape time is strived for by personnel, the fireproof effect of the fireproof door body is further improved, and the water pump is hidden in the inner cavity of the water storage barrel through the design of the sealing box, so that the problem that the fire damages the water pump to the water pump and stops working is avoided, and the reliability of the device is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the ventilator of the present invention;

FIG. 3 is a schematic view of the structure of the self-closing disk of the present invention;

FIG. 4 is a schematic diagram of a standby monitoring mechanism according to the present invention;

FIG. 5 is a schematic view of the structure of the water-adding protection mechanism of the present invention;

FIG. 6 is a schematic view of a part of the internal structure of the water storage barrel of the present invention;

fig. 7 is a schematic structural view of the rapid escape mechanism of the present invention;

fig. 8 is an enlarged schematic view of the structure a of the present invention.

In the figure: 1. a fireproof frame; 2. a fire door body; 3. an extension strip;

4. a self-closing ventilation mechanism; 41. a ventilation tube; 42. an exhaust fan; 43. a smoke sensor; 44. a metal protective net; 45. a self-closing disk; 451. a ventilation circular groove; 452. a closed circular plate; 453. a first gear; 454. a second gear; 46. a standby monitoring mechanism; 461. a bottom frame; 462. triggering a button; 463. bending a rod; 464. a graphite rod; 465. graphite ring fins; 466. a low melting point alloy wire; 467. pressing down the sliding plate;

5. a water adding protection mechanism; 51. a top strip; 52. a water passing tank; 53. bending the pipe; 54. tilting the spray head; 55. a connecting frame; 56. a water storage cylinder; 561. a seal box; 562. a water pump; 563. a storage battery; 564. sealing cover; 565. a metal water pipe;

6. a rapid escape mechanism; 61. an embedded ring; 62. a warning light; 63. a tempered glass ring; 64. a partition plate; 65. a control box; 66. a warning label; 67. a gas generator body; 68. a fixed cylinder; 681. sliding to break fragments; 682. connecting an air pipe; 683. a gas storage tank; 684. an electromagnetic valve; 685. a diverter tray.

Detailed Description

The invention is further illustrated by the following examples:

example 1

As shown in fig. 1 to 8, the invention provides a fire door device for a pipe gallery, which comprises a fire-proof frame body 1, wherein the front surface of the fire-proof frame body 1 is rotatably connected with a fire door body 2, the top and the bottom of the fire-proof frame body 1 are fixedly welded with extension bars 3, the front surface of the fire door body 2 is provided with a quick escape mechanism 6, the front surface of the extension bars 3 is provided with a self-closing ventilation mechanism 4, the top of the extension bars 3 is provided with a water adding protection mechanism 5, the self-closing ventilation mechanism 4 comprises a ventilation drum 41, the ventilation drum 41 is fixedly arranged on the front surface of the extension bars 3, an exhaust fan 42 is fixedly arranged in the inner cavity of the ventilation drum 41, a smoke sensor 43 is fixedly arranged at the top of the inner cavity of the ventilation drum 41, a self-closing disc 45 is fixedly arranged in the inner cavity of the ventilation drum 41, a metal protection net 44 is detachably connected in the inner cavity of the ventilation drum 41, the water adding protection mechanism 5 comprises a top bar 51, the top strip 51 is fixedly arranged at the top of the extension strip 3, the water trough 52 is arranged in the top strip 51, the front and the back of the top strip 51 are fixedly connected with the bent pipe 53, the bottom of the bent pipe 53 is fixedly connected with the inclined spray head 54, the back of the top strip 51 is fixedly provided with the connecting frame 55, the back of the connecting frame 55 is fixedly provided with the water storage barrel 56, the quick escape mechanism 6 comprises an embedded ring 61, the embedded ring 61 is fixedly arranged at the front of the fireproof door body 2, the front and the back of the embedded ring 61 are fixedly provided with the warning lamps 62, the inner wall of the embedded ring 61 is fixedly connected with the toughened glass ring 63, the inner wall of the toughened glass ring 63 is fixedly connected with the baffle plate 64, the front and the back of the baffle plate 64 are fixedly provided with the control box 65, the front and the back of the baffle plate 64 are fixedly provided with the warning labels 66, the inner cavity of the baffle plate 64 is internally provided with the gas generator body 67, the fixed barrel 68 is fixedly installed on the inner wall of the embedded ring 61, ventilation treatment can be carried out on the interior of the pipe gallery through the operation of the exhaust fan 42, the fire is monitored through the operation of the smoke sensor 43 by means of the air smoke content, if the fire occurs, the stepping motor is immediately controlled to operate, the rotating seat is driven to rotate through the transmission of the second gear 454 and the first gear 453, the sealing circular plate 452 is driven to rotate around the front circle center of the first gear 453 by a certain angle, the sealing circular plate 452 seals the ventilation circular groove 451, and the problem that the smoke spreads through the inner cavity of the ventilation barrel 41 is avoided.

Example 2

As shown in fig. 1-8, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the front surface of the self-closing disk 45 is provided with a ventilation circular groove 451, the front surface of the self-closing disk 45 is rotationally connected with a rotating seat, the outer wall of the rotating seat is fixedly provided with a closed circular plate 452, the front surface of the rotating seat is fixedly provided with a first gear 453, the inner cavity of the self-closing disk 45 is provided with a stepping motor, the output shaft of the stepping motor extends to the outer surface of the self-closing disk 45 and is fixedly connected with a second gear 454, the outer wall of the first gear 453 is meshed with the outer wall of the second gear 454, the bottom of the inner cavity of the ventilation drum 41 is provided with a standby monitoring mechanism 46, the standby monitoring mechanism 46 comprises a bottom frame 461, the bottom frame 461 is fixedly arranged at the bottom of the inner cavity of the ventilation drum 41, the bottom of the inner cavity of the bottom frame 461 is fixedly provided with a trigger button 462, the top of the bottom frame 461 is fixedly provided with a bent rod 463, one end of the bent rod 463 away from the bottom frame 461 is fixedly connected with a graphite rod 464, the outer wall of the graphite rod 464 is fixedly connected with a graphite ring fin 465, the outer wall of the graphite rod 464 is movably connected with a low-melting-point alloy wire 466, the bottom of the low-melting-point alloy wire 466 is fixedly provided with a pressing sliding plate 467, the pressing sliding plate 467 is slidably connected in the inner cavity of the bottom frame 461, the material of the low-melting-point alloy wire 466 is a low-melting-point bismuth tin alloy, the temperature of smoke is very easy to exceed the melting point of the low-melting-point alloy wire 466, when the smoke sensor 43 is damaged, the high-temperature smoke can promote the low-melting-point alloy wire 466 to fuse, the pulling force on the pressing sliding plate 467 is relieved, the pressing sliding plate 467 can slide down in the inner cavity of the bottom frame 461 under the influence of gravity, then the pressing sliding plate is touched to a trigger button 462, the operation of subsequent components is controlled through the trigger button 462, and the problem that fire information cannot be monitored when the smoke sensor 43 is damaged is avoided.

Example 3

As shown in fig. 1-8, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the bottom of water storage section of thick bamboo 56 inner chamber fixed mounting has sealed box 561, the bottom fixed mounting of sealed box 561 inner chamber has suction pump 562, suction pump 562's input tube extends to sealed box 561's bottom, suction pump 562's output tube extends to water storage section of thick bamboo 56's front fixedly connected with metal water pipe 565, the one end that suction pump 562 was kept away from to metal water pipe 565 and the back fixed connection of top strip 51, sealed box 561's top dismantlement is connected with sealed cap 564, be connected with battery 563 in sealed box 561's the inner chamber dismantlement, when the condition of a fire takes place, control suction pump 562 work, the water in the suction pump 56 inner chamber is taken out, carry in the inner chamber of water tank 52 through metal water pipe 565, then spout fire door body 2's surface through the slope shower nozzle 54 of return bend 53 bottom, form one deck water curtain at fire door body 2's surface, alleviate the condition, get more time for the personnel, further promote the fireproof effect of fire door body 2, and through sealed box 561's design, make suction pump 562 be hidden in water storage section of thick bamboo 56's inner chamber, the condition of a fire pump is avoided the condition to cause the damage to the suction pump to stop its problem of working.

Example 4

As shown in fig. 1-8, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the inner cavity of the fixed cylinder 68 is slidably connected with a sliding broken block 681, the inner cavity of the partition plate 64 is fixedly provided with a gas storage cylinder 683, the output end of the gas storage cylinder 683 is fixedly connected with an electromagnetic valve 684, one end of the electromagnetic valve 684, which is far away from the gas storage cylinder 683, is fixedly connected with a distribution plate 685, the top of the distribution plate 685 is fixedly connected with a connecting air pipe 682, one end of the connecting air pipe 682, which is far away from the distribution plate 685, is fixedly connected with the outer wall of the fixed cylinder 68, the output pipe of the gas generator body 67 is fixedly connected with the input end of the gas storage cylinder 683, when the door lock is damaged, the control box 65 can control the whole operation of the quick escape mechanism 6, firstly, the gas generator body 67 works, gas is conveyed into the inner cavity of the gas storage cylinder 683 through the output pipe thereof, after a period of conveying, the electromagnetic valve 684 is controlled to be opened, high-pressure gas in the inner cavity of the gas storage cylinder 683 can flow into the inner cavity of the fixed cylinder 68 through the distribution plate 685 and the connecting air pipe 682, the pushing of the sliding broken block 681 slides out of the inner cavity of the fixed cylinder 68, and then the quick-moving sliding broken block 681 is quickly moved to destroy the inner cavity of the glass broken block 63, and the quick escape ring 61 can be embedded into the partition plate 61.

The working principle of the fire door device for a pipe rack is described below.

When the device is used, as shown in fig. 1-8, the device is arranged at a reserved door frame of a pipe gallery in advance, people can pass through the opening of the fireproof door body 2, the operation of the exhaust fan 42 is controlled, ventilation treatment can be carried out on the interior of the pipe gallery, the smoke sensor 43 and the standby monitoring mechanism 46 are used for monitoring the fire condition simultaneously, if the fire condition occurs, the stepping motor is controlled to operate, the rotating seat is driven to rotate by the transmission of the second gear 454 and the first gear 453, the ventilation circular groove 451 is sealed by the sealing circular plate 452, the problem that smoke spreads through the ventilating drum 41 is avoided, the water pump 562 is controlled to operate, water in the inner cavity of the water storage drum 56 is extracted, then the inclined nozzle 54 at the bottom of the bent pipe 53 is used for spraying the surface of the fireproof door body 2, a layer of water curtain is formed on the surface of the fireproof door body 2, the fire condition is relieved, if the door lock is damaged, the rapid escape mechanism 6 is controlled to operate integrally by the control box 65, the gas is conveyed into the inner cavity of the gas storage body 683 by the gas generator 67, the electromagnetic valve 684 is controlled to be opened after the conveying is completed, the sliding of the sliding broken fragments 681 is driven to be broken along with the inner cavity of the fixed drum 68, the glass is broken by the sliding ring 63, the rapid sliding fragments can be embedded into the partition plate 61 along with the rapid ring 61.

The foregoing invention has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.

Claims

1. A fire door arrangement for a pipe rack, comprising a fire-proof frame (1), characterized in that: the fire-proof door comprises a fire-proof frame body (1), wherein the front face of the fire-proof frame body (1) is rotationally connected with a fire-proof door body (2), extension strips (3) are fixedly welded at the top and the bottom of the fire-proof frame body (1), a quick escape mechanism (6) is arranged on the front face of the fire-proof door body (2), a self-closing ventilation mechanism (4) is arranged on the front face of the extension strips (3), and a water adding protection mechanism (5) is arranged at the top of the extension strips (3);

the self-closing ventilation mechanism (4) comprises a ventilation drum (41), the ventilation drum (41) is fixedly arranged on the front surface of the extension strip (3), an exhaust fan (42) is fixedly arranged in an inner cavity of the ventilation drum (41), a smoke sensor (43) is fixedly arranged at the top of the inner cavity of the ventilation drum (41), a self-closing disc (45) is fixedly arranged in the inner cavity of the ventilation drum (41), and a metal protection net (44) is detachably connected in the inner cavity of the ventilation drum (41);

the water adding protection mechanism (5) comprises a top strip (51), the top strip (51) is fixedly arranged at the top of the extension strip (3), a water passing groove (52) is formed in the top strip (51), bent pipes (53) are fixedly connected to the front surface and the back surface of the top strip (51), an inclined spray head (54) is fixedly connected to the bottom of each bent pipe (53), a connecting frame (55) is fixedly arranged on the back surface of the top strip (51), and a water storage barrel (56) is fixedly arranged on the back surface of each connecting frame (55);

the rapid escape mechanism (6) comprises an embedded ring (61), the embedded ring (61) is fixedly arranged on the front surface of the fireproof door body (2), warning lamps (62) are fixedly arranged on the front surface and the back surface of the embedded ring (61), a toughened glass ring (63) is fixedly connected to the inner wall of the embedded ring (61), a partition plate (64) is fixedly connected to the inner wall of the toughened glass ring (63), a control box (65) is fixedly arranged on the front surface and the back surface of the partition plate (64), warning labels (66) are fixedly arranged on the front surface and the back surface of the partition plate (64), a gas generator body (67) is arranged in an inner cavity of the partition plate (64), and a fixed cylinder (68) is fixedly arranged on the inner wall of the embedded ring (61);

sliding connection breaks piece (681) in the inner chamber of fixed cylinder (68), fixed mounting has in the inner chamber of baffle (64) and holds gas pitcher body (683), the output fixedly connected with solenoid valve (684) of gas pitcher body (683), the one end fixedly connected with flow distribution disc (685) of gas pitcher body (683) is kept away from to solenoid valve (684), the top fixedly connected with connection trachea (682) of flow distribution disc (685), the one end that flow distribution disc (685) was kept away from to connection trachea (682) and the outer wall fixed connection of fixed cylinder (68), the output tube of gas generator body (67) and the input fixed connection of gas pitcher body (683).

2. A fire rated door apparatus for a duct work as claimed in claim 1, wherein: the utility model discloses a self-closing disk, including self-closing disk (45), ventilation circular slot (451) have been seted up in the front of self-closing disk (45), self-closing disk (45) openly rotate and are connected with the rotation seat, fixed mounting has sealed plectane (452) on the outer wall of rotation seat, the front fixed mounting who rotates the seat has first gear (453), be provided with step motor in the inner chamber of self-closing disk (45), step motor's output shaft extends to fixedly connected with second gear (454) on the surface of self-closing disk (45), the outer wall of first gear (453) and the outer wall meshing of second gear (454).

3. A fire rated door apparatus for a duct work as claimed in claim 1, wherein: the bottom of ventilation tube (41) inner chamber is provided with reserve monitoring mechanism (46), reserve monitoring mechanism (46) include underframe (461), underframe (461) fixed mounting is in the bottom of ventilation tube (41) inner chamber, the bottom fixed mounting in underframe (461) inner chamber has trigger button (462), the top fixed mounting of underframe (461) has bent rod (463), one end fixedly connected with graphite pole (464) of underframe (461) are kept away from to bent rod (463).

4. A fire rated door apparatus for a duct work as claimed in claim 3, wherein: the graphite rod is characterized in that graphite ring fins (465) are fixedly connected to the outer wall of the graphite rod (464), low-melting-point alloy wires (466) are movably connected to the outer wall of the graphite rod (464), a pressing sliding plate (467) is fixedly arranged at the bottom of each low-melting-point alloy wire (466), and the pressing sliding plate (467) is slidably connected to the inner cavity of the bottom frame (461).

5. A fire rated door apparatus for a duct work as claimed in claim 1, wherein: the water storage device is characterized in that a sealing box (561) is fixedly arranged at the bottom of an inner cavity of the water storage barrel (56), a water suction pump (562) is fixedly arranged at the bottom of the inner cavity of the sealing box (561), an input pipe of the water suction pump (562) extends to the bottom of the sealing box (561), and an output pipe of the water suction pump (562) extends to the front surface of the water storage barrel (56) and is fixedly connected with a metal water pipe (565).

6. A fire rated door apparatus for a duct work as recited in claim 5, wherein: one end of the metal water pipe (565) far away from the water suction pump (562) is fixedly connected with the back surface of the top strip (51), the top of the sealing box (561) is detachably connected with the sealing cover (564), and the inner cavity of the sealing box (561) is detachably connected with the storage battery (563).