Fire damper with adjustable air volume

Abstract

This utility model relates to the field of fire dampers, and more particularly to a fire damper with adjustable airflow. This utility model provides a fire damper with adjustable airflow that can seal the valve body and rotating fan blades around the perimeter during a fire, preventing the spread or leakage of flames and smoke, slowing down heat conduction, reducing fire losses and damage, improving isolation effectiveness, and ensuring safe use. A fire damper with adjustable airflow includes a valve body and rotating fan blades, with rotating fan blades rotatably connected to both the left and right sides of the valve body. This utility model utilizes the cooperation of a worm gear, worm wheel, gear, and rack to ensure the rotating fan blades rotate and return to a tight seal. The rotating fan blades are sealed by magnetic attraction, and a blocking block moves and returns to a tight seal with the rotating fan blades. Therefore, it can seal the valve body and rotating fan blades around the perimeter during a fire, preventing the spread or leakage of flames and smoke, slowing down heat conduction, reducing fire losses and damage, improving isolation effectiveness, and ensuring safe use.

Description

Technical Field

[0001] This utility model relates to the field of fire dampers, and in particular to a fire damper with adjustable air volume. Background Technology

[0002] In modern buildings and industrial facilities, ventilation systems are crucial for ensuring indoor air quality and regulating temperature and humidity; their safety and reliability are paramount. Ventilation systems typically contain numerous ducts and dampers to control airflow direction and volume. However, fire poses a significant threat to ventilation systems and the safety of the entire building. In the event of a fire, the ventilation system can become a conduit for the rapid spread of flames and smoke, exacerbating the severity of the fire.

[0003] A fire damper with adjustable airflow, disclosed in Publication No. CN219673346U, includes a valve frame. A first housing is fixedly connected to the top of the valve frame. A dual-axis motor is fixedly installed at the middle of the top of the first housing. Threaded rods are provided on both sides of the dual-axis motor. Movable blocks are threadedly connected to the outer surface of each threaded rod. The device fixes a fixed plate to a designated area through fixing holes. The dual-axis motor is activated by an external controller, driving the threaded rods to rotate. The threaded rods drive the movable blocks to move outward, and the movable blocks drive the movable baffle to move outward, achieving automatic airflow adjustment. This solves the problem that existing fire dampers do not have the function of automatic airflow adjustment. However, the device has poor sealing performance. In the event of a fire, it cannot effectively seal the valve body and the area around the rotating fan blades. Flames and smoke can easily leak and spread from the gaps between the fan blades and the valve body, causing the fire to spread rapidly to other areas, accelerating the heat conduction speed, increasing the difficulty of personnel evacuation and fire fighting and rescue, and affecting the safety of use.

[0004] Therefore, it is necessary to design a fireproof valve that can seal the valve body and rotating fan blades in the event of a fire, prevent the spread or leakage of flames and smoke, slow down the heat conduction speed, reduce fire losses and damage, improve the isolation effect, and use a safe adjustable airflow. Utility Model Content

[0005] To overcome the shortcomings of current devices that cannot effectively seal the valve body and rotating fan blades, allowing flames and smoke to easily leak and spread from the gaps between the fan blades and the valve body, causing the fire to spread rapidly to other areas, accelerating heat conduction, increasing the difficulty of personnel evacuation and firefighting, and affecting safety, this utility model provides a fireproof valve with adjustable airflow that can seal the valve body and rotating fan blades during a fire, preventing the spread or leakage of flames and smoke, slowing down the heat conduction rate, reducing fire losses and damage, improving isolation effect, and ensuring safe use.

[0006] Technical solution: A fire damper with adjustable airflow includes a valve body, rotating fan blades, a shield, an adjusting component, and a sealing component. Rotating fan blades are rotatably connected to both the left and right sides of the valve body, and a shield is connected to the upper side of the valve body. The rotating fan blades are rotatably connected to the shield. An adjusting component for adjusting the airflow is provided between the rotating fan blades and the shield. A sealing component for preventing smoke leakage is provided on the valve body.

[0007] In a preferred embodiment of this utility model, the rotating fan blades are all made of iron.

[0008] In a preferred embodiment of the present invention, the adjusting component includes a worm, a worm wheel, a gear, and a rack. The worm is rotatably connected to the left side of the shield, and a worm wheel is connected to the upper part of the rotating fan blade on the left side. The worm wheel and the worm mesh with each other. Gears are connected to the outer side of the upper part of the rotating fan blade, and a rack is slidably connected to the front part of the shield. All gears mesh with the rack.

[0009] In a preferred embodiment of this invention, the diameter of the worm gear is smaller than the diameter of the gear.

[0010] In a preferred embodiment of the present invention, a knob is also included, with the knob connected to the front side of the worm gear.

[0011] In a preferred embodiment of this utility model, the sealing assembly includes a magnet, a guide rod, a blocking block, and a telescopic spring. Magnets are connected to the inner sides of both the left and right sides of the valve body. Two guide rods are connected to the upper and lower parts of the valve body. A blocking block is slidably connected between the two guide rods at the same lateral position. The rotating fan blades are in contact with the blocking blocks. A telescopic spring is connected between each guide rod and the blocking block on the same side.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model uses the cooperation of worm gear, worm wheel, gear and rack to make the rotating fan blades rotate and reset to fit tightly against each other. The rotating fan blades are sealed by magnetic adsorption and the blocking block moves and resets to fit tightly against the rotating fan blades. Thus, it can seal the valve body and the area around the rotating fan blades in case of fire, prevent the spread or leakage of flames and smoke, slow down the heat conduction speed, reduce fire loss and damage, improve the isolation effect and make it safe to use.

[0013] 2. This utility model uses the combined use of worm gear, worm wheel, gear and rack to make the rotating fan blades rotate, thereby adjusting the angle of the rotating fan blades to regulate the air volume and achieve ventilation. It can adjust the angle of the rotating fan blades to regulate the air volume for ventilation, making it easy to control the air flow, improve indoor air quality, and enhance comfort and ventilation effect. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional cross-sectional view of the worm gear and worm wheel components of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the gears and racks of this utility model.

[0017] Figure 4 This is a three-dimensional cross-sectional view of the rotating fan blades and other components of this utility model.

[0018] Figure 5 This is a three-dimensional cross-sectional view of the guide rod and telescopic spring components of this utility model.

[0019] The markings in the diagram are: 1-valve body, 2-rotating fan blade, 3-shield, 4-worm gear, 41-knob, 5-worm wheel, 6-gear, 7-rack, 8-magnet, 9-guide rod, 10-shield block, 11-telescopic spring. Detailed Implementation

[0020] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0021] A fire damper with adjustable airflow, such as Figures 1-5 As shown, the device includes a valve body 1, rotating fan blades 2, a shield 3, an adjustment component, and a sealing component. The rotating fan blades 2 are rotatably connected to both the left and right sides of the valve body 1. The rotating fan blades 2 are made of iron for easy adsorption. The shield 3 is connected to the upper side of the valve body 1. The rotating fan blades 2 are rotatably connected to the shield 3. An adjustment component for adjusting the airflow is provided between the rotating fan blades 2 and the shield 3. A sealing component for preventing flue gas leakage is provided on the valve body 1.

[0022] like Figures 1-3 As shown, the adjustment assembly includes a worm gear 4, a worm wheel 5, a gear 6, and a rack 7. The worm gear 4 is rotatably connected to the left side of the shield 3. The worm wheel 5 is connected to the upper part of the rotating fan blade 2 on the left side, and the worm wheel 5 meshes with the worm gear 4. The gear 6 is connected to the outer side of the upper part of the rotating fan blade 2. The diameter of the worm wheel 5 is smaller than the diameter of the gear 6. The rack 7 is slidably connected to the front of the shield 3, and the gear 6 meshes with the rack 7. The assembly also includes a knob 41, which is connected to the front side of the worm gear 4 for easy hand gripping and rotation of the worm gear 4.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the sealing assembly includes a magnet 8, a guide rod 9, a blocking block 10, and a telescopic spring 11. The magnet 8 is connected to the inner sides of both the left and right sides of the valve body 1. The guide rods 9 are connected to the upper and lower parts of the valve body 1. The blocking block 10 is slidably connected between the two guide rods 9 at the same lateral position. The rotating fan blades 2 are in contact with the blocking block 10. The telescopic spring 11 is connected between the guide rod 9 and the blocking block 10 on the same side.

[0024] When fire dampers are required in buildings, this device can be used. After the valve body 1 is installed in the designated area, the worm gear 4 is rotated by the knob 41. The worm gear 4 meshes with the worm wheel 5, causing the worm wheel 5 to rotate. This rotates the corresponding rotating fan blade 2, causing the gear 6 to rotate. The gear 6 meshes with the rack 7, causing the rack 7 to move along the shield 3, causing the rotating fan blade 2 on the other side to rotate. This disengages the rotating fan blade 2 from the magnet 8, thereby adjusting the angle of the rotating fan blade 2 to regulate the airflow and achieve ventilation. Simultaneously, the rotating fan blade 2 compresses the shield block 10, causing it to move along the guide rod 9. The telescopic spring 11 is compressed, thus allowing adjustment of the angle of the rotating fan blade 2 to regulate the airflow for ventilation. This facilitates airflow control, improves indoor air quality, and enhances comfort and ventilation. The worm wheel 5... The diameter is smaller than that of the gear 6. In the event of a fire, the worm 4 is rotated in the reverse direction, and the worm 4 meshes with the worm wheel 5, causing the worm wheel 5 to rotate in the reverse direction. This drives the corresponding rotating fan blade 2 to rotate in the reverse direction, causing the gear 6 to rotate in the reverse direction. The gear 6 meshes with the rack 7, causing the rack 7 to move in the reverse direction and reset. This causes the rotating fan blade 2 on the other side to rotate in the reverse direction and reset, making the two rotating fan blades 2 stick together. The magnet 8 is used to attract and seal the rotating fan blades 2. The telescopic spring 11 rebounds, and the blocking block 10 moves in the reverse direction and resets, sticking together and sealing with the rotating fan blades 2. The rotating fan blades 2 are all made of iron, which facilitates attraction. This allows the valve body 1 and the rotating fan blades 2 to be sealed around them in the event of a fire, preventing the spread or leakage of flames and smoke, slowing down the heat conduction speed, reducing fire losses and damage, improving the isolation effect, and ensuring safe use.

[0025] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A fire damper with adjustable airflow, characterized in that: It includes a valve body (1), a rotating fan blade (2), a shield (3), an adjustment component and a sealing component. The left and right sides of the valve body (1) are rotatably connected to the rotating fan blade (2). The upper side of the valve body (1) is connected to the shield (3). The rotating fan blade (2) is rotatably connected to the shield (3). An adjustment component for adjusting the air volume is provided between the rotating fan blade (2) and the shield (3). A sealing component for preventing flue gas leakage is provided on the valve body (1).

2. A fire damper with adjustable airflow according to claim 1, characterized in that: The rotating fan blades (2) are all made of iron.

3. A fire damper with adjustable airflow according to claim 1, characterized in that: The adjustment assembly includes a worm (4), a worm wheel (5), a gear (6) and a rack (7). The left side of the shield (3) is rotatably connected to the worm (4). The upper part of the left rotating fan blade (2) is connected to the worm wheel (5), which meshes with the worm (4). The upper outer side of the rotating fan blade (2) is connected to the gear (6). The front part of the shield (3) is slidably connected to the rack (7), which meshes with the rack (7).

4. A fire damper with adjustable airflow according to claim 3, characterized in that: The diameter of the worm gear (5) is smaller than the diameter of the gear (6).

5. A fire damper with adjustable airflow according to claim 3, characterized in that: It also includes a knob (41), and the knob (41) is connected to the front side of the worm (4).

6. A fire damper with adjustable airflow according to claim 1, characterized in that: The sealing assembly includes a magnet (8), a guide rod (9), a blocking block (10), and a telescopic spring (11). The inner sides of the left and right sides of the valve body (1) are connected to magnets (8). The upper and lower parts of the valve body (1) are connected to two guide rods (9). The two guide rods (9) at the same lateral position are slidably connected to the blocking block (10). The rotating fan blades (2) are in contact with the blocking block (10). The guide rods (9) are connected to the blocking block (10) on the same side by a telescopic spring (11).

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