Fire smoke exhaust damper

Abstract

The utility model discloses a fire-fighting smoke exhaust air valve belongs to fire-fighting technical field, including valve pipe, two open and close subassembly are rotationally connected in valve pipe inside, and the outer surface of valve pipe is fixedly connected with control mechanism through bolt, it through transmission subassembly cooperation open and close subassembly, adopts the rigid transmission structure of rack drive gear to replace traditional belt drive, effectively avoided the wind valve closing failure problem's occurrence that causes the belt wear, slack and high temperature softening fracture, significantly promoted the reliability of smoke exhaust air valve open and close control, ensure that the valve can accurate open and close when the fire, through the thread cooperation of two -way screw rod and moving block, the guiding effect of slide rail to sliding block is combined, make two transmission subassembly realize synchronous reverse motion to drive two open and close subassembly symmetrical start -stop, guarantee the opening angle is consistent, make the smoke exhaust more even, improved the practicality of smoke exhaust air valve.

Description

Technical Field

[0001] This utility model relates to the field of fire protection technology, and more specifically, to a fire smoke exhaust valve. Background Technology

[0002] In modern building fire safety systems, effective smoke control is a key element in reducing fire casualties and property losses. When a fire occurs, high-temperature smoke not only reduces visibility and hinders personnel evacuation and fire rescue, but its toxic components also directly threaten life safety. Mechanical smoke exhaust systems, as the core equipment for active smoke control, are widely used in high-rise buildings, underground projects, large commercial complexes, and other places. Fire exhaust dampers, as key components in this system that control the flow path of smoke and prevent the spread of fire, directly determine the effectiveness of the smoke exhaust system through their performance and reliability.

[0003] Chinese Patent Publication No. CN220540401U discloses a multi-leaf fire smoke exhaust valve. This design features a stepped baffle with a higher inner side and a lower outer side. When the smoke exhaust valve needs to be closed to prevent the spread of fire, the baffle assembly is closed, and the protrusions engage with the inner grooves in adjacent baffles for fixation. A rubber layer is fixedly installed on the notch surface of the front baffle, and the bottom surface of the notch fits against the corresponding surface of the rubber layer, greatly improving the sealing and stability when closed. This effectively prevents internal smoke from pushing the smoke exhaust valve open, further enhancing its safety performance. However, in practical implementation, the following defects still exist: the smoke exhaust valve is controlled by belt drive. As a flexible transmission component, the belt is prone to wear and loosening due to friction over long-term use, and it is also prone to softening or even breaking in the high-temperature smoke environment generated by a fire, which can easily lead to malfunctions in the opening and closing of the smoke exhaust valve, thus losing its smoke control function.

[0004] Therefore, a fire-fighting smoke exhaust valve is proposed to address the above problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a fire smoke exhaust valve that can prevent the smoke exhaust valve from opening and closing malfunctions.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A fire-fighting smoke exhaust valve includes a valve pipe with two opening and closing components rotatably connected inside the valve pipe. A control mechanism is fixedly connected to the outer surface of the valve pipe by bolts. The control mechanism includes a connecting shell, which is fixedly installed on the outer surface of the valve pipe by bolts. A slide rail is fixedly connected to the inner cavity of the connecting shell. A drive component is fixedly connected to one side of the connecting shell, and two transmission components are threadedly connected to the outside of the drive component.

[0010] Furthermore, the drive assembly includes a motor, the output end of which is fixedly connected to a bidirectional lead screw via a coupling. The two sections of threads on the outer surface of the bidirectional lead screw are identical but opposite in direction, and a fixed seat is rotatably connected to the outer surface of the bidirectional lead screw.

[0011] Furthermore, the transmission assembly includes a movable block, a slider is fixedly connected to one side of the movable block, and a rack is fixedly connected to the other side of the movable block.

[0012] Furthermore, the opening and closing assembly includes a rotating rod, which is rotatably installed inside the valve pipe. A gear is fixedly connected to the outer surface of the rotating rod, and multiple sealing plates are fixedly connected to the outer surface of the rotating rod. Power transmission is achieved through gear and rack meshing, replacing the traditional belt drive and effectively improving transmission efficiency and high temperature resistance.

[0013] Furthermore, the outer surfaces of the two gears are respectively meshed with the outer surfaces of the two racks, and the inner surfaces of the two sliders are slidably connected to the outer surfaces of the slide rails.

[0014] Furthermore, the inner surfaces of both moving blocks are threadedly connected to the outer surface of the bidirectional lead screw, the motor is fixedly installed on one side of the connecting shell, and the fixing seat is fixedly installed on the top wall of the inner cavity of the connecting shell.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] This solution utilizes a rigid transmission structure with rack and pinion drives to replace traditional belt drives, effectively preventing valve closure failures caused by belt wear, loosening, and high-temperature softening and breakage. This significantly improves the reliability of smoke exhaust valve opening and closing control, ensuring precise valve opening and closing in the event of a fire. Through the threaded engagement of a bidirectional lead screw and a moving block, combined with the guiding effect of a slide rail on the slider, the two transmission components move synchronously in opposite directions, driving the two opening and closing components to open and close symmetrically, ensuring consistent opening angles and more uniform smoke exhaust. The valve pipe and connecting shell are bolted together, and the modular design of each component facilitates installation, debugging, and subsequent maintenance and replacement, effectively reducing operation and maintenance costs and enhancing the practicality of the smoke exhaust valve. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the opening and closing component of this utility model;

[0020] Figure 3 This is a schematic diagram of the control mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the drive component of this utility model;

[0022] Figure 5 This is a schematic diagram of the transmission component of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1. Valve pipe; 2. Opening and closing assembly; 21. Rotating rod; 22. Gear; 23. Sealing plate; 3. Control mechanism; 31. Connecting shell; 32. Slide rail; 33. Drive assembly; 331. Motor; 332. Two-way lead screw; 333. Fixed seat; 34. Transmission assembly; 341. Moving block; 342. Sliding block; 343. Rack. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example 1:

[0029] Please see Figure 1-5 A fire-fighting smoke exhaust valve includes a valve pipe 1, with two opening and closing components 2 rotatably connected inside the valve pipe 1. A control mechanism 3 is fixedly connected to the outer surface of the valve pipe 1 by bolts. The control mechanism 3 includes a connecting shell 31, which is fixedly installed on the outer surface of the valve pipe 1 by bolts. A slide rail 32 is fixedly connected to the inner cavity of the connecting shell 31. A drive component 33 is fixedly connected to one side of the connecting shell 31. Two transmission components 34 are threadedly connected to the outside of the drive component 33.

[0030] In this design, the control mechanism 3 is fixedly installed on the outside of the valve pipe 1 with bolts. The valve pipe 1 serves as a channel for flue gas flow. The two opening and closing components 2 inside the valve pipe 1 open and close the channel by rotating. The control mechanism 3 provides driving force for the opening and closing of the two opening and closing components 2. When the two transmission components 34 move outward simultaneously under the action of the drive component 33, the two opening and closing components 2 will open simultaneously, and the flue gas can be smoothly discharged from the valve pipe 1. When the two transmission components 34 move inward simultaneously under the action of the drive component 33, the two opening and closing components 2 will close simultaneously, thereby sealing the channel of the valve pipe 1.

[0031] Please see Figure 2-5 The drive assembly 33 includes a motor 331, which is fixedly installed on one side of the connecting shell 31. The output end of the motor 331 is fixedly connected to a bidirectional lead screw 332 via a coupling. The two threads on the outer surface of the bidirectional lead screw 332 are the same but opposite in direction. A fixed seat 333 is rotatably connected to the outer surface of the bidirectional lead screw 332. The fixed seat 333 is fixedly installed on the top wall of the inner cavity of the connecting shell 31.

[0032] Motor 331 uses a Y2-132M-4 type three-phase asynchronous motor with a power of 7.5kW and a speed of 1440r / min, and has good high temperature resistance.

[0033] The transmission assembly 34 includes a moving block 341. The inner surfaces of the two moving blocks 341 are threadedly connected to the outer surface of the bidirectional lead screw 332. A slider 342 is fixedly connected to one side of the moving block 341. The inner surfaces of the two sliders 342 are slidably connected to the outer surface of the slide rail 32. A rack 343 is fixedly connected to the other side of the moving block 341.

[0034] The opening and closing assembly 2 includes a rotating rod 21, which is rotatably installed inside the valve pipe 1. Gears 22 are fixedly connected to the outer surface of the rotating rod 21. The outer surfaces of the two gears 22 are respectively meshed with the outer surfaces of the two racks 343. Multiple sealing plates 23 are fixedly connected to the outer surface of the rotating rod 21.

[0035] When the exhaust valve needs to be opened, start the motor 331, which drives the bidirectional lead screw 332 to rotate. Since the two threads on the outer surface of the bidirectional lead screw 332 are in opposite directions, the two moving blocks 341 will move away from each other along the bidirectional lead screw 332 under the action of the threads. At the same time, the slider 342 slides on the slide rail 32 to guide the movement of the moving blocks 341 and prevent them from rotating.

[0036] When the moving block 341 moves, it drives the rack 343 to move synchronously. The rack 343 meshes with the gear 22, thereby driving the gear 22 to rotate. The gear 22 then drives the rotating rod 21 to rotate, and the sealing plate 23 on the rotating rod 21 rotates accordingly, so that the sealing plates 23 on the two opening and closing components 2 are opened at the same time, allowing the flue gas to pass smoothly through the valve pipe 1 and realize the smoke exhaust function.

[0037] When the smoke exhaust valve needs to be closed, the control motor 331 rotates in the reverse direction, which drives the bidirectional lead screw 332 to rotate in the reverse direction. The two moving blocks 341 move closer to each other under the action of the screw. The rack 343 then drives the gear 22 to rotate in the reverse direction. The rotating rod 21 and the sealing plate 23 also rotate in the reverse direction, so that the sealing plate 23 on the two opening and closing components 2 is reset, closing the channel inside the valve pipe 1, which plays the role of smoke isolation and fire prevention.

[0038] It should be noted that the motor 331 in this utility model is powered by a power supply and controlled by a controller.

[0039] It should be noted that the specific installation method, circuit connection method, and control method of the motor 331 in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0040] Working principle:

[0041] When a fire occurs in the building, the fire control center receives a fire signal (such as a trigger signal from a smoke alarm or temperature sensor) and can open or close the fire exhaust damper by controlling motor 331. When the damper needs to be opened, motor 331 is started, which drives the double-ended lead screw 332 to rotate. Since the two threads on the outer surface of the double-ended lead screw 332 are opposite, the two moving blocks 341 will move away from each other along the double-ended lead screw 332 under the action of the threads. At the same time, the slider 342 slides on the slide rail 32, providing guidance for the movement of the moving blocks 341 and preventing them from rotating.

[0042] When the moving block 341 moves, it drives the rack 343 to move synchronously. The rack 343 meshes with the gear 22, thereby driving the gear 22 to rotate. The gear 22 then drives the rotating rod 21 to rotate, and the sealing plate 23 on the rotating rod 21 rotates accordingly, so that the sealing plates 23 on the two opening and closing components 2 are opened at the same time, allowing the flue gas to pass smoothly through the valve pipe 1 and realize the smoke exhaust function.

[0043] When the air valve needs to be closed, the control motor 331 starts and rotates in the reverse direction. At this time, the two moving blocks 341 move closer to each other under the action of the thread. The rack 343 drives the gear 22 to rotate in the reverse direction. The rotating rod 21 and the sealing plate 23 also rotate in the reverse direction, so that the sealing plate 23 on the two opening and closing components 2 is reset, and the passage inside the valve pipe 1 is closed, which plays the role of smoke isolation and fire prevention.

[0044] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A fire-fighting smoke exhaust valve, comprising a valve pipe (1), characterized in that: The valve tube (1) is internally connected to two opening and closing components (2). A control mechanism (3) is fixedly connected to the outer surface of the valve tube (1) by bolts. The control mechanism (3) includes a connecting shell (31). The connecting shell (31) is fixedly installed on the outer surface of the valve tube (1) by bolts. A slide rail (32) is fixedly connected to the inner cavity of the connecting shell (31). A drive assembly (33) is fixedly connected to one side of the connecting shell (31). The drive assembly (33) is externally threaded with two transmission assemblies (34). The transmission assembly (34) includes a moving block (341). 341) A slider (342) is fixedly connected to one side of the moving block (341), and a rack (343) is fixedly connected to the other side of the moving block (341). The opening and closing assembly (2) includes a rotating rod (21), which is rotatably installed inside the valve pipe (1). A gear (22) is fixedly connected to the outer surface of the rotating rod (21), and multiple sealing plates (23) are fixedly connected to the outer surface of the rotating rod (21). The outer surfaces of the two gears (22) are respectively meshed with the outer surfaces of the two racks (343). The inner surfaces of the two sliders (342) are slidably connected to the outer surface of the slide rail (32).

2. The fire-fighting smoke exhaust valve according to claim 1, characterized in that: The drive assembly (33) includes a motor (331), the output end of which is fixedly connected to a bidirectional lead screw (332) via a coupling. The two threads on the outer surface of the bidirectional lead screw (332) are the same but opposite in direction. A fixed seat (333) is rotatably connected to the outer surface of the bidirectional lead screw (332).

3. A fire-fighting smoke exhaust valve according to claim 2, characterized in that: The inner surfaces of the two moving blocks (341) are threaded to the outer surface of the bidirectional lead screw (332). The motor (331) is fixedly installed on one side of the connecting shell (31), and the fixed seat (333) is fixedly installed on the top wall of the inner cavity of the connecting shell (31).

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