Automatic fireproof plugging device for pneumatic air pipe

Abstract

The invention discloses a pneumatic type air pipe automatic fireproof plugging device, which belongs to the technical field of building fireproof equipment, and comprises a bracket, a fireproof plugging plate, a plugging mechanism for driving the fireproof plugging plate, a fixed air pipe, a movable air pipe and a movable air pipe telescopic mechanism for driving the movable air pipe, the diameter of the fixed air pipe is larger than that of the air pipe, the diameter of the movable air pipe is larger than that of the fixed air pipe, the fixed air pipe is sleeved with the movable air pipe, and the diameter of a funnel structure at the front end of the movable air pipe is smaller than that of the air pipe; the movable air pipe front-end funnel structure and the movable air pipe front-end funnel structure are sequentially in butt joint in the wall face air pipe in the flowing direction of air pressure in the air pipe, the fireproof blocking plate can be inserted into a disconnection gap between the movable air pipe front-end funnel structure and the air pipe, the movable air pipe stretches out and draws back to achieve tight connection and disconnection of a gap with a certain width of the air pipe front-end funnel structure, and the fireproof blocking plate is inserted into the gap to separate a building hole from the air pipe. Building holes are effectively blocked, and the fire-retardant separation effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of building fire protection equipment, and specifically relates to a pneumatic air duct automatic fire protection blocking device. Background Art

[0002] Holes are one of the more common architectural features in various buildings or structures, especially for some buildings that often use tubular materials, such as pneumatic logistics, production lines that transport materials in steel pipes, etc. The existence of these holes provides convenience for transporting materials in space, especially using pressure to transport materials in steel pipes, which greatly improves production efficiency.

[0003] However, in terms of building fire prevention, the existence of building holes undoubtedly provides a convenient way for fire to spread to adjacent spaces when a fire occurs. Therefore, fire blocking of building holes is crucial to achieving building fire safety. Due to the different uses of building holes, there are large differences in specific factors such as the shape, size, location, and whether there are objects passing through the building holes. It is relatively easy to fire block building holes without through objects, but it has always been a technical difficulty to fire block building holes with through objects, especially for pressure conveying materials in steel pipes, such as production lines for pneumatic logistics and conveying materials in steel pipes. Summary of the invention

[0004] In order to solve the fire blocking of building holes where materials are transported in steel pipes, the present application provides a pneumatic duct automatic fire blocking device, and the specific technical solutions adopted are as follows:

[0005] A pneumatic air duct automatic fireproof blocking device, characterized in that it includes: a bracket, a fireproof blocking plate, a blocking mechanism for driving the fireproof blocking plate, a fixed air duct, a movable air duct and a movable air duct telescopic mechanism for driving the movable air duct, the bracket is installed on the wall surface opposite to the wind pressure flow direction in the air duct of the building hole; the air duct is connected to both sides of the automatic fireproof blocking device through an air duct flange, and the fixed air duct with a diameter larger than the air duct diameter is sleeved on the air duct in sequence in the opposite direction of the wind pressure flow direction in the air duct, the movable air duct with a diameter larger than the fixed air duct diameter is sleeved on the fixed air duct, and the funnel structure at the front end of the movable air duct has a diameter smaller than the air duct diameter and is inserted into the air duct; it is connected to the wall air duct in sequence according to the wind pressure flow direction in the air duct, and the fireproof blocking plate can be inserted into the gap between the funnel structure at the front end of the movable air duct and the air duct; the fireproof blocking plate is provided with an annular overflow hole facing the wall, and a fire-blocking tape is embedded in the annular overflow hole.

[0006] Preferably, a fixed air duct sealing plate and a mobile air duct sealing plate are respectively provided at the interfaces of the air duct, the fixed air duct and the mobile air duct, and a sealing silicone pad is provided between the fixed air duct sealing plate and the mobile air duct sealing plate.

[0007] Preferably, the mobile air duct telescopic mechanism includes a mobile air duct telescopic slide rail, a mobile air duct telescopic slider, a mobile air duct telescopic slider fixing plate and a mobile air duct telescopic push rod. The mobile air duct telescopic mechanism supports the mobile air duct by two sets of mobile air duct telescopic slide rails arranged on the base plate and mobile air duct telescopic sliders slidably matched therewith. The two mobile air duct telescopic push rods are diagonally arranged at the lower left side and the upper right side, with their front ends fixed to the mobile air duct sealing plate facing the wall, and their rear ends fixed to the base plate away from the wall.

[0008] Preferably, the bottom plate is provided with a movable air duct retraction limit switch at the movable air duct telescopic push rod retraction limit position, which is fixed to the movable air duct retraction limit switch fixing plate and fixed to the bottom plate.

[0009] Preferably, the blocking mechanism includes a fireproof blocking plate push rod, a front end fixing member of the fireproof blocking plate push rod arranged at the front end of the fireproof blocking plate push rod, and a rear end fixing member of the fireproof blocking plate push rod arranged at the rear end of the fireproof blocking plate push rod; the left fixed plate of the blocking mechanism is provided with a fireproof blocking plate slide rail, and the fireproof blocking plate facing the fire side is connected through a fireproof blocking plate slide block and can be inserted into the gap between the front end funnel structure of the movable air duct and the air duct.

[0010] Preferably, the fireproof blocking plate is provided with a fireproof blocking plate closing position sensor and a fireproof blocking plate opening travel switch at the left fixed plate at the extreme position of the fireproof blocking plate extension and the extreme position of the fireproof blocking plate retraction respectively;

[0011] Preferably, ceramic fiberboard and rock wool are embedded in the fireproof sealing plate.

[0012] The present invention has the following beneficial effects:

[0013] When a fire occurs, the present invention realizes that the front end funnel structure of the mobile air duct is in close contact with the air duct and is disconnected from a gap of a certain width by telescoping the mobile air duct, and a fireproof blocking plate is inserted into the gap to separate the building hole from the air duct. The fireproof blocking plate is closely connected to the wall of the ceramic fiberboard (paper, cotton) wrapped around the air duct at the junction of the wall and the automatic fireproof blocking device, and is integrated to effectively block the building hole, thereby achieving a fire-blocking and separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 A front view structural diagram of the automatic fireproof blocking device provided by the present invention in an open state;

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0017] Figure 3 A top view of the automatic fireproof blocking device provided by the present invention in an open state;

[0018] Figure 4 A front view structural diagram of the automatic fireproof blocking device provided by the present invention in a closed state;

[0019] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the BB direction;

[0020] Figure 6 A top view of the automatic fireproof blocking device provided by the present invention in a closed state;

[0021] Figure 7 A schematic diagram of the three-dimensional structure of the air duct in the open state of the automatic fireproof blocking device provided by the present invention;

[0022] Figure 8 A top view of the structure of the air duct in the open state in the automatic fireproof blocking device provided by the present invention;

[0023] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure along CC direction;

[0024] Fig.10 A schematic diagram of the three-dimensional structure of the air duct blocking state in the automatic fire-proof blocking device provided by the present invention;

[0025] Fig.11 A top view of the structure of the air duct in the blocked state in the automatic fireproof blocking device provided by the present invention;

[0026] Fig.12 for Fig.11 Schematic diagram of the cross-sectional structure along the DD direction;

[0027] Fig.13 A schematic diagram of the fixed air duct structure in the automatic fireproof blocking device provided by the present invention;

[0028] Fig.14 A schematic diagram of the structure of a movable air duct in the automatic fireproof blocking device provided by the present invention;

[0029] Fig.15 A schematic diagram of the front end structure of the movable air duct in the automatic fireproof blocking device provided by the present invention;

[0030] Fig.16 for Fig.15 Schematic diagram of the cross-sectional structure along the GG direction;

[0031] Fig.17 A schematic diagram of a three-dimensional structure of a movable air duct and a front end of the movable air duct installed in the automatic fireproof blocking device provided by the present invention;

[0032] Fig.18 for Fig.17 Side view of

[0033] Fig.19 A front view of a fireproof blocking plate in the automatic fireproof blocking device provided by the present invention;

[0034] Fig. 20 A schematic diagram of the internal structure of a fireproof sealing plate in the automatic fireproof sealing device provided by the present invention.

[0035] Among them, 10, bracket; 20, mobile air duct telescopic mechanism; 30, blocking mechanism; 40, bolt; 50, sealing silicone pad;

[0036] 101, wall; 102, air duct; 103, air duct flange; 104, expansion bolt;

[0037] 201, fixed air duct; 2011, bottom plate; 2012, fixed air duct sealing plate;

[0038] 202, movable air duct; 2021, front end of movable air duct; 2022, telescopic slide rail of movable air duct; 2023, telescopic slider of movable air duct; 20231, fixing plate of telescopic slider of movable air duct; 2024, sealing plate of movable air duct; 2025, travel switch for retracting movable air duct; 20251, fixing plate of travel switch for retracting movable air duct; 2026, fixing plate of optical axis; 20261, optical axis; 20262, bushing; 2027, telescopic push rod of movable air duct; 20271, front end fixing piece of telescopic push rod of movable air duct;

[0039] 20272, rear end fixing piece of the telescopic push rod of the mobile air duct; 2028, right side supporting screw;

[0040] 301, left fixed plate; 3011, fire blocking plate slide rail; 3012, fire blocking plate slider; 3013, fire blocking plate slider fixing plate; 3014, left support plate;

[0041] 302, fireproof blocking plate push rod; 3021, front end fixing piece of the fireproof blocking plate push rod; 3022, rear end fixing piece of the fireproof blocking plate push rod;

[0042] 303, fireproof sealing plate opening travel switch; 3031, fireproof sealing plate opening travel switch fixing plate; 3032, fireproof sealing plate closing position sensor; 3033, fireproof sealing plate closing position sensor fixing plate;

[0043] 304, right side fixing plate;

[0044] 305, fireproof sealing plate; 3051, annular overflow hole; 3052, fire-blocking tape; 3053, rock wool; 3054, ceramic fiberboard. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different embodiments as defined and covered by the claims.

[0046] In the following description of the present invention, it should be noted that terms such as "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and "vertical" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be understood as limiting the present invention.

[0047] In the following description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, in the following description of the present invention, unless otherwise specified, “plurality”, “multiple groups”, and “multiple roots” mean two or more.

[0049] Example

[0050] like Figure 1-20As shown, this embodiment shows a pneumatic air duct automatic fireproof blocking device, including: a bracket 10, a fireproof blocking plate 305, a blocking mechanism 30 for driving the fireproof blocking plate 305, a fixed air duct 201, a movable air duct 202 and a movable air duct telescopic mechanism 20 for driving the movable air duct. The bracket 10 is installed on the wall on the opposite side of the wind pressure flow direction of the building hole air duct 102; the air duct 102 is connected to both sides of the automatic fire blocking device through the air duct flange 103, and the fixed air duct 201 installation structure includes a bottom plate 2011 and a fixed air duct sealing plate 2012; in the reverse direction of the wind pressure flow direction in the air duct 102, the fixed air duct 201 with a diameter larger than the diameter of the air duct 102 is sleeved on the air duct 102, the movable air duct 202 with a diameter larger than the diameter of the fixed air duct 201 is sleeved on the fixed air duct 201, and the funnel structure 21 at the front end of the movable air duct has a diameter smaller than the diameter of the air duct 102 and is inserted into the air duct 102; in the reverse direction of the wind pressure flow direction in the air duct 102, the fixed air duct 201 with a diameter larger than the diameter of the air duct 102 .... The moving direction is connected to the wall air duct 102 in sequence, and the fireproof blocking plate 305 can be inserted into the gap between the funnel structure of the front end 2021 of the mobile air duct and the air duct 102; the mobile air duct 202 is extended and retracted to realize the close connection and disconnection of the funnel structure of the front end 2021 of the mobile air duct with the air duct 102 by a certain width gap, and the fireproof blocking plate 305 is inserted into the gap to separate the building hole from the air duct 102, and the fireproof blocking plate 305 is closely connected with the wall 101 and the ceramic fiberboard (paper, cotton) wrapped around the air duct 102 at the junction of the wall 101 and the automatic fireproof blocking device to effectively block the building hole, thereby achieving the fire-blocking separation effect.

[0051] A bracket 10 is installed on the wall opposite to the wind pressure flow direction in the hole air duct 102 through expansion bolts 104, and the automatic fireproof blocking device is installed on the bracket 10. The two sides of the automatic fireproof blocking device are connected to the fixed air duct 201 through air duct flanges 103.

[0052] The mobile air duct telescopic mechanism 20 includes a mobile air duct telescopic slide rail 2022, a mobile air duct telescopic slider 2023, a mobile air duct telescopic slider fixing plate 20231, a mobile air duct front end 2021 and a mobile air duct sealing plate 2024. The mobile air duct telescopic mechanism 20 is provided with two sets of mobile air duct telescopic slide rails 2022 on the bottom plate 2011, and the mobile air duct 202 is lifted up through the mobile air duct telescopic slider 2023; the fixed air duct 201 with a diameter larger than the diameter of the air duct 102 is sleeved on the air duct 102 in sequence according to the reverse direction of the wind pressure flow in the air duct 102, the mobile air duct 202 with a diameter larger than the diameter of the fixed air duct 201 is sleeved on the fixed air duct 201, and the funnel structure of the mobile air duct front end 2021 with a diameter smaller than the diameter of the air duct 102 is inserted into the air duct 102; it is connected to the wall air duct 102 in sequence according to the wind pressure flow direction in the air duct 102;

[0053] Two mobile air duct telescopic push rods 2027 are diagonally arranged at the lower left side and the upper right side, with their front ends fixed to the mobile air duct sealing plate 2024 facing the wall, and their rear ends fixed to the bottom plate 2011 away from the wall. The bottom plate 211 is provided with a mobile air duct retracted travel switch 2025 fixed to the mobile air duct retracted travel switch fixing plate 20251 and fixed to the bottom plate 211 at the retracted limit position of the mobile air duct telescopic push rod 2027;

[0054] The blocking mechanism 30 includes a fireproof blocking plate push rod 302, a front end fixing piece 3021 of the fireproof blocking plate push rod arranged at the front end of the fireproof blocking plate push rod 302, and a rear end fixing piece 3022 of the fireproof blocking plate push rod arranged at the rear end of the fireproof blocking plate push rod 302. The front end fixing piece 3021 of the fireproof blocking plate push rod is hinged to the fireproof blocking plate 305, and the rear end fixing piece 3022 of the fireproof blocking plate push rod is hinged to the left fixing plate 301;

[0055] The fireproof blocking plate 305 has an extended limit position and a retracted limit position, and the left fixed plate 301 is provided with a fireproof blocking plate closed position sensor 3032 and a fireproof blocking plate open limit switch 303;

[0056] The upper right ends of both sides of the bottom plate 2011 are connected with optical axes 20261 and provided with shaft sleeves 20262. The shaft sleeves 102 are fixed to the sealing plate 2021 at the front end of the mobile air duct. The left fixed plate 301 of the blocking mechanism 30 is provided with a fireproof blocking plate slide rail 3011. The fireproof blocking plate 305 on the side facing the fire surface can be inserted into the gap between the funnel structure 2021 at the front end of the mobile air duct and the air duct 102 through the fireproof blocking plate slider 3012. The shape of the annular overflow hole 3015 on the wall side of the fireproof blocking plate 305 matches the shape of the gap of the air duct 102 and is larger than the air duct 102.

[0057] The fireproof sealing plate 305 is inlaid with ceramic fiberboard 3054 and rock wool 3053, and the annular overflow hole 3052 is inlaid with a fireproof tape 3052. The fireproof tape 3052 expands and overflows when exposed to fire to seal the running gap between the fireproof sealing plate 305 and the air duct 102, which can achieve a better heat insulation and fireproofing effect.

[0058] A fixed air duct sealing plate 2012 and a mobile air duct sealing plate 2024 are respectively provided at the interfaces of the air duct 102, the fixed air duct 201 and the mobile air duct 202, and a sealing silicone pad 50 is provided between the sealing plates; the mobile air duct 20 is used to seal with the air duct 102 and the fixed air duct 201 after being extended to achieve airtightness of the internal pressure of the duct, and to convey materials under the action of the wind pressure flow direction.

[0059] The upper right ends of both sides of the bottom plate 2011 are connected with an optical axis 20261 and provided with a shaft sleeve 20262, and the shaft sleeve 102 is fixed to the sealing plate 2021 at the front end of the mobile air duct to ensure the stability of the upper end of the mobile air duct 202;

[0060] The specific working process of the fireproof blocking device of this embodiment is as follows:

[0061] When a fire occurs, the smoke sensor, temperature sensor or a person manually triggers the alarm switch, and the fire alarm automatic control device is automatically activated, or the person in the fire control room manually activates the automatic fire blocking device on one side of the building hole to block the building hole to prevent the fire from spreading. Specifically, the two mobile air duct telescopic push rods 2027 are simultaneously activated and diagonally arranged at the lower left side and the upper right side to begin to retract, and the mobile air duct 202 sleeved on the fixed air duct 201 is retracted backward, and the mobile air duct sealing plate 2024 fixed at the front end facing the wall and the funnel-shaped structure of the front end 2021 of the mobile air duct and the mobile air duct sealing plate 2024 at the rear end of the mobile air duct 202 are simultaneously moved backward and disengaged, and the mobile air duct 202 sitting on the mobile air duct telescopic slider 2023 is disengaged. 02 bottom, along the telescopic slide rail 2022 of the mobile air duct to the sleeve 20262 connected to the optical axis 20261 at the upper right end on both sides of the bottom plate 2011, synchronously shift backward along the optical axis 20261, when the mobile air duct 202 runs to the limit position, the mobile air duct 202 is triggered to retract into place travel switch, and the two mobile air duct 202 telescopic push rods 2027 stop working, the funnel-shaped structure at the front end 2021 of the mobile air duct is separated from the air duct by a certain distance; at the same time, the fireproof blocking plate push rod is started The fireproof blocking plate 305 fixed on the fireproof blocking plate slider 3012 moves downward synchronously along the fireproof blocking plate slide rail 3011 on the left fixed plate 301. When the fireproof blocking plate 305 moves to the limit position and triggers the fireproof blocking plate closed position sensor 3032, the fireproof blocking plate push rod 302 stops working. At this time, the funnel-shaped structure inserted into the front end 2021 of the mobile air duct is separated from the air duct. The fireproof sealing plate 305 in the gap completely seals the building hole, and the fire-blocking tape 3052 is embedded in the annular overflow hole 3052. The fire-blocking tape 3052 expands and overflows when encountering fire to seal the running gap between the fireproof sealing plate 305 and the air duct 102, which can achieve a good heat insulation and fireproofing effect. The shape of the annular overflow hole 3015 on the wall side of the fireproof sealing plate 305 matches the shape of the gap between the air duct 102 and is larger than the hole of the air duct 102 and is closely connected to the wall 101 to complete the hole sealing.

[0062] When the fire alarm is lifted and the fire alarm is manually started, the fire blocking plate push rod 302 is started to be retracted and inserted into the gap between the funnel-shaped structure at the front end 2021 of the mobile air duct and the air duct, and the fire blocking plate 305 is retracted upward. The fire blocking plate 305 fixed on the fire blocking plate slider 3012 moves upward synchronously along the fire blocking plate slide rail 3011 on the left fixed plate 301. When the fire blocking plate 305 moves to the limit position and fully opens the building hole, the fire blocking plate opening sensor stroke switch 303 is triggered, and the fire blocking plate push rod 302 stops working. At this time, the fire blocking plate 305 inserted into the gap between the funnel-shaped structure at the front end 2021 of the mobile air duct and the air duct is fully opened. At the same time, the two mobile air duct telescopic push rods 2027 are started to be diagonally arranged at the lower left side and the upper right side to extend, and the mobile air duct 202 sleeved on the fixed air duct 201 extends forward, and the front end is fixed to the mobile air duct seal facing the wall. The plate 2024 and the funnel-shaped structure of the front end 2021 of the mobile air duct and the mobile air duct sealing plate 2024 at the rear end of the mobile air duct 202 move forward and shift close to each other at the same time, and the bottom end of the mobile air duct 202 sitting on the mobile air duct telescopic slider 2023 moves forward synchronously along the mobile air duct telescopic slide rail 2022 and the shaft sleeve 20262 connected to the optical axis 20261 at the upper right end on both sides of the bottom plate 2011, and shifts forward synchronously along the optical axis 20261. When the two mobile air duct telescopic push rods 2027 are diagonally arranged at the lower left side and the upper right side and are fully extended to the limit, when the two mobile air duct 202 telescopic push rods 202 stop working, the mobile air duct sealing plate 2024 sleeved on the fixed air duct 201 and the funnel-shaped structure of the front end 2021 of the mobile air duct and the mobile air duct sealing plate 2024 at the rear end of the mobile air duct 202 are tightly docked with the fixed air duct sealing plate 2012 at the same time, the air duct is connected and in a closed state, and normal operation is restored.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pneumatic air duct automatic fireproof blocking device, characterized in that: include: A bracket (10), a fireproof blocking plate (305), a blocking mechanism (30) for driving the fireproof blocking plate (305), a fixed air duct (201), a movable air duct (202), and a movable air duct telescopic mechanism (20) for driving the movable air duct. The bracket (10) is installed on the wall surface on the opposite side of the wind pressure flow direction of the building hole air duct (102); the air duct (102) is connected to both sides of the automatic fireproof blocking device through an air duct flange (103); the air duct (201) having a diameter larger than that of the air duct (102) is fixed in sequence in the opposite direction of the wind pressure flow direction in the air duct (102) and is sleeved on the air duct (102); the movable air duct (201) is fixed in sequence in the opposite direction of the wind pressure flow direction in the air duct (102); The diameter of the movable air duct (202) is larger than that of the fixed air duct (201) and is sleeved on the fixed air duct (201); the diameter of the funnel structure at the front end (2021) of the movable air duct is smaller than that of the air duct (102) and is inserted into the air duct (102); the movable air duct is connected to the wall air duct (102) in sequence according to the flow direction of the wind pressure in the air duct (102); the fireproof sealing plate (305) can be inserted into the gap between the funnel structure at the front end (2021) of the movable air duct and the air duct (102); the fireproof sealing plate (305) is provided with an annular overflow hole (3015) facing the wall, and a fire-blocking tape (3052) is embedded in the annular overflow hole (3015).

2. The pneumatic air duct automatic fireproof blocking device according to claim 1, characterized in that: A fixed air duct sealing plate (2012) and a mobile air duct sealing plate (2024) are respectively provided at the interfaces of the air duct (102), the fixed air duct (201), and the mobile air duct (202), and a sealing silicone pad (50) is provided between the fixed air duct sealing plate (2012) and the mobile air duct sealing plate (2024).

3. The pneumatic air duct automatic fireproof blocking device according to claim 1, characterized in that: The mobile air duct telescopic mechanism (20) comprises a mobile air duct telescopic slide rail (2022), a mobile air duct telescopic slider (2023), a mobile air duct telescopic slider fixing plate (20231) and a mobile air duct telescopic push rod (2027). The mobile air duct telescopic mechanism (20) lifts the mobile air duct (202) by means of two sets of mobile air duct telescopic slide rails (2022) arranged on a bottom plate (2011) and a mobile air duct telescopic slider (2023) slidably matched therewith. The two mobile air duct telescopic push rods (2027) are diagonally arranged at the lower left side and the upper right side, the front ends of which are fixed to a mobile air duct sealing plate (2024) facing the wall, and the rear ends of which are fixed to the bottom plate (2011) away from the wall.

4. The pneumatic air duct automatic fireproof blocking device according to claim 3, characterized in that: The bottom plate (2011) is provided with a movable air duct retraction limit switch (2025) at the retraction limit position of the movable air duct telescopic push rod (2027), which is fixed to a movable air duct retraction limit switch fixing plate (20251) and fixed to the bottom plate (2011).

5. The pneumatic air duct automatic fireproof blocking device according to claim 1, characterized in that: The blocking mechanism (30) comprises a fireproof blocking plate push rod (302), a fireproof blocking plate push rod front end fixing member (3021) arranged at the front end of the fireproof blocking plate push rod (302), and a fireproof blocking plate push rod rear end fixing member (3022) arranged at the rear end of the fireproof blocking plate push rod (302); the left fixed plate (301) of the blocking mechanism (30) is provided with a fireproof blocking plate slide rail (3011), and the fireproof blocking plate (305) on the side facing the fire is connected through the fireproof blocking plate slide block (3012) and can be inserted into the gap between the funnel structure at the front end (2021) of the movable air duct and the air duct (102).

6. The pneumatic air duct automatic fireproof blocking device according to claim 5, characterized in that: The fireproof sealing plate (305) is provided with a fireproof sealing plate closing position sensor (3032) and a fireproof sealing plate opening travel switch (303) at the left fixed plate (301) at the extended limit position and the retracted limit position, respectively.

7. The pneumatic air duct automatic fireproof blocking device according to claim 6, characterized in that: The fireproof sealing plate (305) is inlaid with ceramic fiberboard (3054) and rock wool (3053).

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