Fire damper valve with stable structure

Abstract

The utility model provides a kind of structure stable fire damper, it is related to fire damper technical field, including frame, the frame is equipped with for controlling air flow on-off fan blade by actuator, the fan blade is arranged in the frame, when closing the fan blade, adjacent fan blade side contact and form overlap, the fan blade side is also equipped with for realizing the sealing connection between adjacent fan blade back structure, the utility model has advantage, through the double protection of overlap and back structure, form the close sealing connection between adjacent fan blade, effectively prevent flue gas leakage, also by increasing the thickness of fan blade two sides improve the rigidity of fan blade, make it more difficult to deform due to external force or temperature change, to ensure the structural stability of fan blade, reduce the sealing performance decline problem due to deformation, to prolong the service life of fire damper, reduce the frequency of maintenance and replacement.

Description

Technical Field

[0001] This utility model relates to the field of fire damper technology, and in particular to a fire damper with stable structure. Background Technology

[0002] Fire dampers are crucial safety devices in ventilation and air conditioning systems. Their primary function is to automatically close and cut off airflow in the event of a fire, preventing the spread of fire through ducts. Traditional fire dampers typically consist of a valve body, blades, an actuator, and a temperature sensor. However, during prolonged use, the blades of existing fire dampers are prone to deformation due to thermal expansion and contraction, leading to gaps between adjacent blades and preventing a tight seal. This reduces the sealing performance and reliability of the fire damper. Utility Model Content

[0003] This invention overcomes the shortcomings of the prior art and provides a fire valve with a stable structure.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] A structurally stable fire damper includes a frame, on which fan blades for controlling airflow are mounted via an actuator. The fan blades are neatly arranged within the frame. When the fan blades are closed, the sides of adjacent fan blades contact each other and form an overlapping portion. The sides of the fan blades are also provided with a snap-fit ​​structure for achieving a sealing connection between adjacent fan blades.

[0006] Preferably, the fan blade includes an open end and a tail end. When the fan blade is closed, the open end of the fan blade contacts the tail end of the adjacent fan blade and forms the overlapping portion. The open end is located on the upper side of the tail end. The snap-back structure includes an inwardly curved rolled edge reinforcing rib.

[0007] Preferably, the rolled edge reinforcing rib includes a first rolled edge reinforcing rib that bends inward on the side of the open end facing the tail end of the adjacent fan blade, and also includes a second rolled edge reinforcing rib that bends inward on the side of the tail end facing the open end of the adjacent fan blade.

[0008] When the fan blades are closed, the first rolled edge reinforcing rib at the overlapping part contacts the end of the second rolled edge reinforcing rib to form a fastening, thereby strengthening the seal at the overlapping part.

[0009] Preferably, the frame is provided with a side wall protrusion parallel to the fan blade, and the rolled edge reinforcing ribs on the edge of the fan blade are attached to the surface of the side wall protrusion to enhance the seal between the frame and the edge of the fan blade.

[0010] Preferably, the actuator includes a driver that drives the rotating shaft to rotate, the rotating shaft being fixedly connected to the fan blades and driving the fan blades to rotate synchronously;

[0011] Multiple rotating shafts are connected to a blade linkage mechanism to achieve synchronous operation of multiple fan blades.

[0012] Preferably, the blade linkage mechanism includes a linkage component, which includes a linkage rod and rotating plates hinged side by side on the linkage rod. One end of the rotating plate is hinged to the linkage rod, and the other end is fixedly connected to the rotating shaft and the fan blade through a mounting plate.

[0013] The driver drives the rotating shaft to rotate, the rotating shaft drives the fan blades and the rotating plate to rotate together, and the rotating plate drives the linkage rod to move, thereby realizing the synchronous rotation of all the rotating plates connected to the linkage rod and all the fan blades, so as to realize multiple fan blades. Preferably, the blade linkage mechanism also includes a passive component, and the linkage component and the passive component are disposed at opposite ends of the fan blades.

[0014] The passive component includes an elastic element connected to the inner wall of the frame. One end of the elastic element is fixedly connected to the inner wall of the frame, and the other end is connected to a second rotating plate. The second rotating plate is fixedly connected to the rotating shaft and the fan blade through a second mounting plate.

[0015] Preferably, the rotating shaft includes an active rotating shaft, which is fixedly connected to the fan blade and has one end passing through the frame and connected to the driver, and the other end connected to the passive component;

[0016] The rotating shaft also includes a passive rotating shaft, which is connected to the fan blade and parallel to the active rotating shaft. The passive rotating shaft is connected to the rotating blade and the linkage rod through the mounting plate.

[0017] The frame is provided with a hollow mounting frame that protrudes, and the hollow mounting frame is installed at both ends of the fan blade and is parallel to the linkage rod;

[0018] The active rotating shaft and the passive rotating shaft pass through the outer wall of the hollow mounting frame at both ends and are placed inside the hollow mounting frame;

[0019] The driver drives the active rotating shaft to rotate, and the blade linkage mechanism drives the passive rotating shaft to rotate, so as to realize the synchronous operation of multiple fan blades.

[0020] Preferably, the passive rotating shaft can be configured as a short rotating shaft that is only connected to both ends of the fan blade.

[0021] Preferably, the hollow mounting frame is provided with a U-shaped spring piece on the side near the fan blade, and the U-shaped spring piece is sleeved on the hollow mounting frame from the side and is located between the hollow mounting frame and the fan blade;

[0022] The bottom end of the U-shaped spring is designed as an outwardly convex arc surface, which is located between the hollow mounting frame and the fan blade;

[0023] The active rotating shaft and the passive rotating shaft pass through the arc-shaped surface and the outer wall of the hollow mounting frame and extend into the hollow mounting frame.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] A structurally stable fire damper, through the double protection of the overlapping part and the snap-back structure, forms a tight sealing connection between adjacent fan blades, effectively preventing smoke leakage. Furthermore, by increasing the thickness on both sides of the fan blades, the rigidity of the fan blades is improved, making them less susceptible to deformation due to external forces or temperature changes. This ensures the structural stability of the fan blades, reduces the problem of decreased sealing performance caused by deformation, thereby extending the service life of the fire damper and reducing the frequency of maintenance and replacement. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present invention and, together with the embodiments of the present invention, are used to explain the present invention. They do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a first structural schematic diagram of the fire damper described in this utility model;

[0028] Figure 2 This is a schematic diagram of the second structure of the fire damper described in this utility model;

[0029] Figure 3 This is a utility model Figure 2 Schematic diagram of the structure at point A;

[0030] Figure 4 This is a schematic diagram of the third structure of the fire damper described in this utility model;

[0031] Figure 5 This is a schematic diagram of the fourth structure of the fire damper described in this utility model;

[0032] Figure 6 This is a utility model Figure 5 Schematic diagram of the structure at point B;

[0033] Figure 7 This is a schematic diagram of the hollow mounting frame and U-shaped spring sheet described in this utility model;

[0034] Figure 8This is a fifth structural schematic diagram of the fire damper described in this utility model;

[0035] Figure 9 This is a first structural schematic diagram of the fan blade and the blade linkage mechanism of this utility model;

[0036] Figure 10 This is a second structural schematic diagram of the fan blade and the blade linkage mechanism of this utility model;

[0037] Figure 11 This is a schematic diagram of the structure of the fan blade described in this utility model;

[0038] In the diagram: 1-Frame; 2-Fan blade; 3-Actuator; 4-Overlapping part; 5-Retracting structure; 6-Rolled edge reinforcing rib; 7-First rolled edge reinforcing rib; 8-Second rolled edge reinforcing rib; 9-Side wall protrusion; 10-Rotating shaft; 11-Driver; 12-Blade linkage mechanism; 13-Linkage component; 14-Passive component; 15-Hollow mounting frame; 16-U-shaped spring; 17-Arc-shaped surface; 201-Open end; 202-Tail end; 1001-Active rotating shaft; 1002-Passive rotating shaft; 1003-Short rotating shaft; 1301-Linkage rod; 1302-Rotating plate; 1303-Mounting plate; 1401-Elastic component; 1402-Second rotating plate; 1403-Second mounting plate. Detailed Implementation

[0039] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0040] like Figures 1 to 11 As shown, a structurally stable fire damper includes a frame 1. The frame 1 is equipped with fan blades 2 for controlling the airflow interruption via an actuator 3. The fan blades 2 are neatly arranged inside the frame 1. When the fan blades 2 are closed, the sides of adjacent fan blades 2 contact each other and form an overlapping part 4. The sides of the fan blades 2 are also provided with a retraction structure 5 for achieving a sealing connection between adjacent fan blades 2.

[0041] Specifically, such as Figures 6 to 8 As shown, the fan blade 2 includes an open end 201 and a tail end 202. When the fan blade 2 is closed, the open end 201 of the fan blade 2 contacts the tail end 202 of the adjacent fan blade 2 and forms an overlapping part 4. The open end 201 is located on the upper side of the tail end 202. The snap-back structure 5 includes an inwardly bent rolled edge reinforcing rib 6.

[0042] In this embodiment, the rolled edge reinforcing rib 6 includes a first rolled edge reinforcing rib 7 that is bent inward on the side of the open end 201 toward the tail end 202 of the adjacent fan blade 2, and also includes a second rolled edge reinforcing rib 8 that is bent inward on the side of the tail end 202 toward the open end 201 of the adjacent fan blade 2.

[0043] When the fan blade 2 is closed, the first rolled edge reinforcing rib 7 and the second rolled edge reinforcing rib 8 at the overlapping part 4 contact each other to form an interlocking mechanism, strengthening the seal at the overlapping part 4. The first rolled edge reinforcing rib 7 and the second rolled edge reinforcing rib 8 are designed on both sides of the fan blade 2, increasing the thickness of both sides of the fan blade 2 and improving its rigidity. This makes it less prone to deformation due to external forces or temperature changes, better ensuring the structural stability of the fan blade 2 and reducing the risk of deformation. Through the double protection of the overlapping part 4 and the snap-back structure 5, a tight sealing connection is formed between adjacent fan blades 2, effectively preventing flue gas leakage. The rolled edge reinforcing ribs 6 interlock with each other when closed, allowing the fan blades 2 to fit tightly together, forming an effective sealing barrier and further enhancing the tightness of the seal.

[0044] The frame 1 has a side wall protrusion 9 parallel to the fan blade 2. The rolled edge reinforcing rib 6 on the side of the edge fan blade 2 is attached to the surface of the side wall protrusion 9 to strengthen the seal between the frame 1 and the edge fan blade 2 and prevent smoke from leaking from the gap between the edge fan blade 2 and the frame 1. Through the cooperation of the side wall protrusion 9 and the rolled edge reinforcing rib 9, the sealing integrity of the entire fire damper is improved, ensuring that the fire damper can effectively prevent the spread of smoke and flames when a fire occurs.

[0045] like Figures 1 to 8 As shown, the actuator 3 includes a driver 11 that drives the rotating shaft 10 to rotate. The rotating shaft 10 is fixedly connected to the fan blade 2 and drives the fan blade 2 to rotate synchronously.

[0046] Multiple rotating shafts 10 are connected to the blade linkage mechanism 12 to realize the synchronous action of multiple fan blades 2, improve the reliability and response speed of the fire damper, and the synchronous design of the blade linkage mechanism 12 can adapt to fire dampers of different sizes and types, with wide applicability, and can ensure fast and synchronous closure under various complex conditions.

[0047] The blade linkage mechanism 12 includes a linkage component 13, which includes a linkage rod 1301 and a rotating plate 1302 hinged side by side on the linkage rod 1301. One end of the rotating plate 1302 is hinged to the linkage rod 1301, and the other end is fixedly connected to the rotating shaft 10 and the fan blade 2 through the mounting plate 1303.

[0048] The driver 11 drives the rotating shaft 10 to rotate, the rotating shaft 10 drives the fan blades 2 and the rotating blades 1302 to rotate together, and the rotating blades 1302 drive the linkage rod 1301 to move, thereby realizing the synchronous rotation of all the rotating blades 1302 connected to the linkage rod 1301 and all the fan blades 2, so as to realize multiple fan blades 2. Preferably, the blade linkage mechanism 12 also includes a passive component 14, and the linkage component 13 and the passive component 14 are disposed at opposite ends of the fan blades 2.

[0049] The passive component 14 includes an elastic element 1401 connected to the inner wall of the frame 1. One end of the elastic element 1401 is fixedly connected to the inner wall of the frame 1, and the other end is connected to a second rotating plate 1402. The second rotating plate 1402 is fixedly connected to the rotating shaft 10 and the fan blade 2 through a second mounting plate 1403.

[0050] The elastic element 1401 provides a passive auxiliary force for the movement of the fan blade 2. When the linkage component 13 drives the fan blade 2 to rotate, the passive component 14 can play the role of buffering and auxiliary support. It also helps to maintain the synchronous movement of the fan blade 2 when subjected to external force interference, improves the stability and reliability of the entire blade linkage mechanism 12, enhances the adaptability of the fire damper under complex working conditions, and also saves the cost of materials used in the passive component 14.

[0051] Furthermore, the rotating shaft 10 includes an active rotating shaft 1001, which is fixedly connected to the fan blade 2 and has one end passing through the frame 1 and connected to the driver 11, and the other end connected to the passive component 14.

[0052] The rotating shaft 10 also includes a passive rotating shaft 1002, which is connected to the fan blade 2 and parallel to the active rotating shaft 1001. The passive rotating shaft 1002 is connected to the rotating blade 1302 and the linkage rod 1301 through the mounting plate 1303.

[0053] The frame 1 has a hollow mounting frame 15 that protrudes inside. The hollow mounting frame 15 is installed at both ends of the fan blade 2 and is parallel to the linkage rod 1301.

[0054] The active rotating shaft 1001 and the passive rotating shaft 1002 pass through the outer wall of the hollow mounting frame 15 and are placed inside the hollow mounting frame 15 at both ends;

[0055] The active rotating shaft 1001 and the passive rotating shaft 1002 work together. The driver 11 drives the active rotating shaft 1001 to rotate, and the passive rotating shaft 1002 follows the rotation under the action of the linkage mechanism 1301, so as to realize the synchronous action of multiple fan blades 2. This layout of the rotating shafts can achieve more precise synchronous control. At the same time, the design of the hollow mounting frame 15 provides stable support and guidance for the passive rotating shaft 1002, improving the smoothness of the entire mechanism's operation.

[0056] Furthermore, such as Figure 3 , Figure 6 and Figure 7 As shown, a U-shaped spring piece 16 is provided on the side of the hollow mounting frame 15 near the fan blade 2. The U-shaped spring piece 16 is sleeved on the hollow mounting frame 15 from the side and is located between the hollow mounting frame 15 and the fan blade 2.

[0057] The bottom of the U-shaped spring piece 16 is set as an outwardly convex arc surface 17, which is located between the hollow mounting frame 15 and the fan blade 2.

[0058] The active rotating shaft 1001 and the passive rotating shaft 1002 pass through the outer wall of the arc-shaped surface 17 and the hollow mounting frame 15 and extend into the hollow mounting frame 15.

[0059] The arc-shaped surface 17 of the U-shaped spring 16 is placed on the side of the fan blade 2 for sealing the valve body. The spring is made of a thin metal material. Utilizing the plasticity of the metal, when the fan blade 2 is closed, the fan blade 2 is flush with the highest point of the arc-shaped surface 17, and at the same time, the arc-shaped surface 17 is pressed to the side, causing the arc-shaped surface 17 of the U-shaped spring 16 to deform towards the hollow mounting frame 15, thereby better fitting the two ends of the fan blade 2 of the valve body and achieving an airtight seal at both ends of the fan blade 2. Using this metal spring, the valve body can maintain airtightness at high temperatures, which is more reliable than rubber seals (which melt at high temperatures). The hollow mounting frame 15 fixes the position of the U-shaped spring 16.

[0060] In addition, the passive rotating shaft 1002 can be configured as a short rotating shaft 1003 connected only to both ends of the fan blade 2. The design of the short rotating shaft 1003 can reduce the use of materials, reduce the weight and complexity of the mechanism, and at the same time improve the flexibility and adaptability of the mechanism while meeting the requirements of synchronous action, making it easy to adjust and optimize according to different sizes and types of fire dampers.

[0061] In this embodiment, the blade linkage mechanism 12, through its ingenious structural design, achieves synchronized movement of multiple blades 2, improving the reliability and response speed of the fire damper. The synergistic effect of the linkage component 13 and the passive component 14 enhances the stability and adaptability of the mechanism, while the classification and layout of the rotating shaft 10 and the application of the short rotating shaft 1003 further optimize the performance and flexibility of the mechanism. This design can meet the needs of fire dampers of different sizes and types, ensuring rapid and synchronized closure under various complex conditions, providing a strong guarantee for the efficient operation of the fire damper.

[0062] This invention forms an overlapping portion 4 by the contact between the open end 201 of the fan blade 2 and the tail end 202 of the adjacent fan blade. This overlapping portion 4 is combined with a snap-back structure 5, including inwardly curved rolled edge reinforcing ribs 6. These rolled edge reinforcing ribs 6 interlock when closed, thereby enhancing the sealing effect. When the fire damper is closed, the overlapping portion 4 of the adjacent fan blades 2 and the snap-back structure 5 work together to form double protection, ensuring that smoke cannot leak through the gap between the adjacent fan blades. This not only improves the sealing performance, but also increases the rigidity of the fan blade 2 by increasing the thickness on both sides of the fan blade 2, making it more difficult to deform due to external forces or temperature changes, thereby ensuring the structural stability of the fan blade 2.

[0063] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structurally stable fire damper, characterized in that: Includes a frame (1), on which a fan blade (2) for controlling the airflow is installed via an actuator (3). The fan blade (2) is neatly arranged inside the frame (1). When the fan blade (2) is closed, the sides of adjacent fan blades (2) contact each other and form an overlapping part (4). The sides of the fan blades (2) are also provided with a snap-lock structure (5) for achieving a sealed connection between adjacent fan blades (2).

2. The structurally stable fire damper according to claim 1, characterized in that: The fan blade (2) includes an open end (201) and a tail end (202). When the fan blade (2) is closed, the open end (201) of the fan blade (2) contacts the tail end (202) of the adjacent fan blade (2) and forms the overlapping part (4). The open end (201) is located on the upper side of the tail end (202). The snap-back structure (5) includes an inwardly curved rolled edge reinforcing rib (6).

3. A structurally stable fire damper according to claim 2, characterized in that: The rolled edge reinforcing rib (6) includes a first rolled edge reinforcing rib (7) that bends inward on the side of the open end (201) toward the tail end (202) of the adjacent fan blade (2), and also includes a second rolled edge reinforcing rib (8) that bends inward on the side of the tail end (202) toward the open end (201) of the adjacent fan blade (2). When the fan blade (2) is closed, the first rolled edge reinforcing rib (7) at the overlapping part (4) and the end of the second rolled edge reinforcing rib (8) come into contact to form a fastening, thereby strengthening the seal at the overlapping part (4).

4. A structurally stable fire damper according to claim 3, characterized in that: The frame (1) is provided with a side wall protrusion (9) parallel to the fan blade (2), and the rolled edge reinforcing rib (6) on the side of the fan blade (2) is attached to the surface of the side wall protrusion (9) to strengthen the seal between the frame (1) and the fan blade (2).

5. A structurally stable fire damper according to claim 4, characterized in that: The actuator (3) includes a driver (11) that drives the rotating shaft (10) to rotate. The rotating shaft (10) is fixedly connected to the fan blade (2) and drives the fan blade (2) to rotate synchronously. Multiple rotating shafts (10) are connected together with the blade linkage mechanism (12) to realize the synchronous operation of multiple fan blades (2).

6. A structurally stable fire damper according to claim 5, characterized in that: The blade linkage mechanism (12) includes a linkage component (13), which includes a linkage rod (1301) and a rotating plate (1302) hinged side by side on the linkage rod (1301). One end of the rotating plate (1302) is hinged to the linkage rod (1301), and the other end is fixedly connected to the rotating shaft (10) and the fan blade (2) through a mounting plate (1303). The driver (11) drives the rotating shaft (10) to rotate. The rotating shaft (10) drives the fan blade (2) and the rotating plate (1302) to rotate together. The rotating plate (1302) drives the linkage rod (1301) to move, thereby realizing the synchronous rotation of all the rotating plates (1302) connected to the linkage rod (1301) and all the fan blades (2), so as to realize the synchronous action of multiple fan blades (2).

7. A structurally stable fire damper according to claim 6, characterized in that: The blade linkage mechanism (12) further includes a passive component (14), and the linkage component (13) and the passive component (14) are disposed at opposite ends of the fan blade (2); The passive component (14) includes an elastic element (1401) connected to the inner wall of the frame (1). One end of the elastic element (1401) is fixedly connected to the inner wall of the frame (1), and the other end is connected to a second rotating plate (1402). The second rotating plate (1402) is fixedly connected to the rotating shaft (10) and the fan blade (2) through a second mounting plate (1403).

8. A structurally stable fire damper according to claim 7, characterized in that: The rotating shaft (10) includes an active rotating shaft (1001), which is fixedly connected to the fan blade (2) and has one end passing through the frame (1) and connected to the driver (11), and the other end connected to the passive component (14); The rotating shaft (10) also includes a passive rotating shaft (1002), which is connected to the fan blade (2) and parallel to the active rotating shaft (1001). The passive rotating shaft (1002) is connected to the rotating plate (1302) and the linkage rod (1301) through the mounting plate (1303). The frame (1) is provided with a hollow mounting frame (15) that is raised. The hollow mounting frame (15) is installed at both ends of the fan blade (2) and is parallel to the linkage rod (1301). The active rotating shaft (1001) and the passive rotating shaft (1002) pass through the outer wall of the hollow mounting frame (15) and are placed inside the hollow mounting frame (15); The driver (11) drives the active rotating shaft (1001) to rotate, and drives the passive rotating shaft (1002) to rotate through the blade linkage mechanism (12) so as to realize the synchronous action of multiple fan blades (2).

9. A structurally stable fire damper according to claim 8, characterized in that: The passive rotating shaft (1002) can be configured as a short rotating shaft (1003) that is only connected to both ends of the fan blade (2).

10. A structurally stable fire damper according to claim 8, characterized in that: The hollow mounting frame (15) is provided with a U-shaped spring piece (16) on the side near the fan blade (2). The U-shaped spring piece (16) is sleeved on the hollow mounting frame (15) from the side and is located between the hollow mounting frame (15) and the fan blade (2). The bottom of the U-shaped spring (16) is provided with an outwardly protruding arc surface (17), and the arc surface (17) is located between the hollow mounting frame (15) and the fan blade (2); The active rotating shaft (1001) and the passive rotating shaft (1002) pass through the outer wall of the arc-shaped surface (17) and the hollow mounting frame (15) and extend into the hollow mounting frame (15).

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