Fireproof valve
By using temperature-sensitive fuse and lever mechanisms in fire-proof valves, the problem that existing exhaust valves cannot block indoor fire flue gas is solved, and the effect of effectively closing the smoke outlet under high temperature conditions is achieved to prevent the spread of fire.
Patent Information
- Application Number
- CN202421635446.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The existing exhaust valve cannot prevent indoor smoke from entering the flue when it catches fire, causing the fire to spread.
A fire-proof valve is designed, using a combination of valve plate, lever and temperature-sensitive fuse. The temperature-sensitive fuse is fused at high temperatures. The lever rotates to make the valve plate cover the smoke exhaust port and prevent the smoke from spreading.
In indoor fires, the fuse mechanism of the temperature-sensitive fuse block effectively closes the smoke exhaust port to prevent the fire from spreading and improves the safety of use.
Smart Images
Figure CN222760363U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue valves, in particular to a fire damper. Background Art
[0002] The fire damper includes a valve body, a valve plate, a connecting rod and a torsion spring. The valve body is provided with an exhaust port. One end of the connecting rod is rotatably connected to the valve plate, and the other end of the connecting rod is rotatably connected to the valve body. The torsion spring drives the connecting rod to rotate relative to the valve body so that the connecting rod opens or closes the exhaust port through the valve plate. Indoor fumes can move to the outdoor flue through the exhaust valve. However, when a fire occurs indoors, the existing exhaust valve cannot prevent the indoor smoke from moving to the flue through the exhaust port. The smoke spreads rapidly in the flue, which can easily lead to the spread of fire. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a fire damper.
[0004] The utility model solves the above-mentioned technical problems with a technical solution as follows: a fire damper comprising a valve body, a valve plate, a lever and a temperature-sensitive fuse, the valve body being provided with two smoke exhaust ports, the valve plates being provided with two, the valve plates being hingedly mounted on the valve body and being used to open or close the smoke exhaust ports, the valve body being provided with a support plate, the support plate being located between the two valve plates, a pin being provided in the middle of the support plate, the lever being rotatably mounted on the pin, a first elastic element being sleeved on the pin, the first elastic element being used to drive the lever to rotate relative to the valve body, one end of the lever being in contact with the temperature-sensitive fuse, and the temperature-sensitive fuse being mounted on the valve body.
[0005] On the basis of the above technical solution, the present invention can also make the following improvements to the above technical solution:
[0006] Preferably, the temperature-sensitive fuse is welded to the valve body via low-melting-point solder.
[0007] Preferably, an auxiliary reset component is provided on the support plate, and the auxiliary reset component includes a second elastic element and a reset component. The second elastic element is installed on the support plate through a support rod. A reset component is respectively provided at both ends of the second elastic element. The reset component is used to assist in driving the valve plate to snap onto the smoke exhaust port under the action of the second elastic element.
[0008] Preferably, a limit plate is provided on the support plate, and the limit plate is used to limit the maximum rotation angle of the shifting rod.
[0009] Preferably, the end of the reset member is bent into an arc-shaped hook or a circular ring.
[0010] Preferably, a sealing member is further included, and the sealing member is located between the valve plate and the smoke exhaust port.
[0011] Preferably, a fixing plate is further included, the sealing member includes a connecting portion and a sealing portion, the connecting portion is located between the valve plate and the fixing plate, the fixing plate and the valve plate are connected via fasteners, and the sealing portion is used to seal the valve plate and the smoke exhaust port.
[0012] Preferably, an arc-shaped protrusion is provided on the valve plate, and the height of the arc-shaped protrusion gradually increases along the rotation direction of the shifting rod.
[0013] Preferably, a downwardly bent protrusion is provided at the end of the lever, and a smoothly transitioned inclined surface is provided on the protrusion.
[0014] Preferably, the center of the arc-shaped protrusion coincides with the rotation center of the lever.
[0015] The beneficial effects of the utility model are as follows: the smoke exhaust port is opened or closed by setting a valve plate to achieve normal smoke exhaust; the temperature-sensitive fuse is used to sense the ambient temperature of the fire damper, and when the external temperature reaches the melting temperature of the temperature-sensitive fuse, for example, when the external temperature is greater than or equal to 150°C, the temperature-sensitive fuse melts and falls off the valve body, and the temperature-sensitive fuse no longer mechanically limits the lever, and the lever rotates under the action of the first single elastic element, and the lever abuts against the valve plate, so that the valve plate firmly covers the smoke exhaust port, prevents the fire from spreading, and improves the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the utility model when the valve plate opens the smoke exhaust port;
[0017] Figure 2 This is a schematic diagram of the utility model when the valve plate closes the smoke exhaust port;
[0018] Figure 3 This is a schematic diagram of the utility model when the lever and the valve plate are against each other;
[0019] Figure 4 It is a cross-sectional schematic diagram of the valve plate and the sealing member of the utility model.
[0020] The accompanying drawings are marked as follows: 1. valve body; 2. smoke exhaust port; 3. valve plate; 4. arc-shaped protrusion; 5. support plate; 6. lever; 7. temperature-sensitive fuse; 8. limit plate; 9. second elastic element; 10. reset member; 11. sealing member; 12. fixing plate; 13. support rod. DETAILED DESCRIPTION
[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0022] like Figures 1 to 4 As shown, the utility model discloses a fire damper, comprising a valve body 1, a valve plate 3, a lever 6 and a temperature-sensitive fuse 7. The valve plate 3 is made of metal. The valve body 1 is provided with two smoke exhaust ports 2. The valve plate 3 is provided with two. The position and number of the valve plates 3 correspond to the position and number of the smoke exhaust ports 2. The valve plate 3 is hingedly mounted on the valve body 1 through a pin and is used to open or close the smoke exhaust port 2. A support plate 5 is mounted on the valve body 1. The support plate 5 is located between the two valve plates 3. A pin is provided in the middle of the support plate 5. The lever 6 is rotatably mounted on the pin. A first elastic element is sleeved on the pin. The first elastic element is a metal torsion spring. One end of the first elastic element is connected to the support plate 5, and the other end is connected to the lever 6, and is used to drive the lever 6 to rotate relative to the valve body 1. One end of the lever 6 abuts against the temperature-sensitive fuse 7. The temperature-sensitive fuse 7 is mounted on the valve body 1. Under normal temperature environment, the range hood blows the valve plate 3 through the oil smoke to open the smoke exhaust port 2, so that the oil smoke is discharged through the smoke exhaust port 2. When the external temperature reaches the melting temperature of the thermosensitive fuse 7, that is, when the ambient temperature is greater than or equal to 150°C, the tin material welding the thermosensitive fuse 7 melts at high temperature, and the thermosensitive fuse 7 is separated from the valve body 1, and the limiting effect on the lever 6 is lost. The lever 6 rotates around the pin shaft under the action of the first elastic body and abuts against the valve plate 3, so that the valve plate 3 firmly covers the smoke exhaust port 2, avoids the spread of fire, and improves the safety of use.
[0023] In this embodiment, the temperature-sensitive fuse piece 7 is welded on the connecting plate through a low-melting-point tin material, and the connecting plate is located below the support plate 5. Specifically, the temperature-sensitive fuse piece 7 is L-shaped, and the temperature-sensitive fuse piece 7 is soldered on the connecting plate. The structure is compact and easy to install. By arranging the temperature-sensitive fuse piece 7 on the connecting plate below the support plate 5, the temperature change at the smoke exhaust port 2 can be quickly sensed, the sensitivity of the sensed temperature is improved, the solder of the temperature-sensitive fuse piece 7 is quickly melted, and the temperature-sensitive fuse piece 7 is separated from the valve body 1, so that the lever 6 can quickly abut on the valve plate 3, so that it closes the smoke exhaust port 2 to prevent the spread of fire.
[0024] Further, the support plate 5 is U-shaped, and the support plate 5 is mounted on the valve body 1 by screws or bolts. The support plate 5 is provided with an auxiliary reset assembly, and the auxiliary reset assembly includes a second elastic element 9 and a reset member 10. The second elastic element 9 is mounted on the support plate 5 by a support rod 13, and the support rod 13 is connected to the pin shaft. Locking nuts are provided at both ends of the second elastic element 9, and the locking nuts are mounted on the support rod 13. The two locking nuts are used to limit the position of the second elastic element 9. A reset member 10 is provided at each end of the second elastic element 9. The reset member 10 is used to assist in driving the valve plate 3 to buckle on the smoke outlet 2 under the action of the second elastic element 9. The second elastic element 9 is a metal torsion spring, and the second elastic element 9 provides a moving pre-tightening force to the reset member 10, so that the valve plate 3 can smoothly close the smoke outlet 2 under the action of the reset member 10, and the time for the valve plate 3 to close the smoke outlet 2 is shortened.
[0025] Specifically, two metal ends of the metal torsion spring extend outward to form a reset member 10, and the end of the reset member 10 is bent into an arc hook or a circular ring, which can not only apply a certain reset force to the valve plate 3, but also avoid the situation where the reset member 10 and the valve plate 3 are stuck or scratched, thereby ensuring that the valve plate 3 can open and close normally. The preload force provided by the second elastic element 9 to the reset member 10 is much smaller than the driving force applied by the first elastic element to the lever 6, so the reset member 10 will not affect the rotation of the lever 6.
[0026] Optionally, the valve plate 3 can also close the smoke exhaust port 2 under the action of gravity, thereby reducing the number of parts and saving costs.
[0027] In this embodiment, a limit plate 8 is provided on the support plate 5, and the limit plate 8 is used to limit the maximum rotation angle of the lever 6. When the lever 6 rotates to a certain angle, the limit plate 8 limits the lever 6, so that the lever 6 abuts against the middle of the valve plate 3, ensuring that the valve plate 3 is tightly buckled on the smoke outlet 2 to prevent the fire from spreading.
[0028] The fire damper further includes a seal 11, which is located between the valve plate 3 and the smoke outlet 2. The seal 11 is made of high temperature resistant rubber, such as silicone rubber or fluororubber. The seal 11 can improve the sealing effect between the valve plate 3 and the smoke outlet 2, reduce smoke leakage, and further ensure the safety of use.
[0029] The fire damper also includes a fixing plate 12, and the sealing member 11 includes a connecting portion and a sealing portion. The connecting portion is located between the valve plate 3 and the fixing plate 12. The fixing plate 12 and the valve plate 3 are connected by fasteners, which may be screws, bolts or rivets. The sealing portion is used to seal the valve plate 3 and the smoke exhaust port 2. The outer edge size of the smoke exhaust port 2 is smaller than the outer edge size of the sealing portion, thereby ensuring the sealing effect of the smoke exhaust port 2. The fixing plate 12 cooperates with the valve plate 3 to clamp the sealing member 11, and then fixes them together by fasteners to ensure the firmness of the installation of the sealing member 11.
[0030] In this embodiment, an arc-shaped protrusion 4 is provided on the valve plate 3. By providing the arc-shaped protrusion 4, the force between the lever 6 and the valve plate 3 can be increased, thereby improving the pressing effect of the lever 6 on the valve plate 3, ensuring that the valve plate 3 is tightly fastened to the smoke exhaust port 2, thereby reducing smoke leakage.
[0031] Furthermore, the height of the arc-shaped protrusion 4 gradually increases along the rotation direction of the lever 6, so that when the lever 6 rotates, the acting force between the lever 6 and the valve plate 3 gradually increases, further improving the acting force between the lever 6 and the valve plate 3, improving the clamping effect of the lever 6 on the valve plate 3, and being able to gradually reduce the rotation speed of the lever 6 due to the friction force, thereby reducing the impact force between the lever 6 and the limit plate 8.
[0032] Furthermore, a downwardly bent protrusion is provided at the end of the lever 6, and a smoothly transitioned inclined surface is provided on the protrusion. When the lever 6 rotates, the inclined surface slides along the arc-shaped protrusion 4. The smoothness of the lever 6 when rotating is improved, and the lever 6 is prevented from getting stuck.
[0033] Furthermore, the center of the arc-shaped protrusion 4 coincides with the rotation center of the lever 6. This improves the coordination between the lever 6 and the arc-shaped protrusion 4, ensures that the lever 6 presses the valve plate 3 through the arc-shaped protrusion 4, and improves the sealing effect.
[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A fire damper, characterized in that: The invention comprises a valve body (1), a valve plate (3), a lever (6) and a temperature-sensitive fuse (7); the valve body (1) is provided with two smoke exhaust ports (2); the valve plate (3) is provided with two valve plates; the valve plate (3) is hingedly mounted on the valve body (1) and is used to open or close the smoke exhaust ports (2); the valve body (1) is provided with a support plate (5); the support plate (5) is located between the two valve plates (3); a pin is provided in the middle of the support plate (5); the lever (6) is rotatably mounted on the pin; a first elastic element is sleeved on the pin; the first elastic element is used to drive the lever (6) to rotate relative to the valve body (1); one end of the lever (6) abuts against the temperature-sensitive fuse (7); the temperature-sensitive fuse (7) is mounted on the valve body (1).
2. The fire damper according to claim 1, characterized in that: The temperature-sensitive fuse (7) is welded to the valve body (1) via low-melting-point solder.
3. The fire damper according to claim 2, characterized in that: The support plate (5) is provided with an auxiliary reset component, and the auxiliary reset component comprises a second elastic element (9) and a reset member (10). The second elastic element (9) is mounted on the support plate (5) via a support rod (13). A reset member (10) is provided at each end of the second elastic element (9). The reset member (10) is used to assist in driving the valve plate (3) to snap onto the smoke exhaust port (2) under the action of the second elastic element (9).
4. The fire damper according to claim 1, characterized in that: The support plate (5) is provided with a limit plate (8), and the limit plate (8) is used to limit the maximum rotation angle of the shifting rod (6).
5. The fire damper according to claim 3, characterized in that: The end of the resetting member (10) is bent into an arc-shaped hook or a circular ring.
6. The fire damper according to claim 1, characterized in that: It also comprises a sealing member (11), wherein the sealing member (11) is located between the valve plate (3) and the smoke exhaust port (2).
7. The fire damper according to claim 6, characterized in that: It also includes a fixing plate (12), the sealing member (11) including a connecting portion and a sealing portion, the connecting portion is located between the valve plate (3) and the fixing plate (12), the fixing plate (12) and the valve plate (3) are connected via fasteners, and the sealing portion is used to seal the valve plate (3) and the smoke exhaust port (2).
8. The fire damper according to claim 1, characterized in that: The valve plate (3) is provided with an arc-shaped protrusion (4), and the height of the arc-shaped protrusion (4) gradually increases along the rotation direction of the shifting rod (6).
9. The fire damper according to claim 8, characterized in that: The end of the lever (6) is provided with a downwardly bent protrusion, and the protrusion is provided with a smoothly transitioned inclined surface.
10. The fire damper according to claim 8, characterized in that: The center of the arc-shaped protrusion (4) coincides with the rotation center of the shifting rod (6).