Flue fireproof device
By using a bimetallic sheet release torsion spring mechanism in the flue duct device to close the flue gas channel, the problem that the existing flue device cannot effectively prevent fire during fire is solved, and the effective sealing of flames and smoke is achieved, reducing fire hazards.
Patent Information
- Application Number
- CN202421228178.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
When existing flue devices occur, there is a lack of effective fire prevention measures, which leads to open flames spreading easily and increases the harm to buildings and personnel.
A flue fireproof device is designed to release the second torsion spring by heating by bimetallic sheets, so that the pressure rod and cover plate enter a closed state, close the flue gas channel, and avoid the spread of open flames.
Effectively close the flue gas channels, prevent the spread of flames and smoke, and reduce the harm caused by fire to buildings and personnel.
Smart Images
Figure CN222677091U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of fire protection, in particular to a flue fire prevention device. Background Art
[0002] With the continuous development of modern construction technology, the requirements for building fire safety are also increasing. When a fire occurs, effectively controlling the spread of fire and smoke is crucial to protecting people's lives and reducing property losses. Especially in crowded places such as residential and commercial buildings, the role of flue fire protection devices is particularly prominent.
[0003] At present, residential buildings are equipped with flues for kitchen fire exhaust. Usually, a flue check valve is installed at the flue mouth, and a normally closed cover is provided in the flue check valve. When the range hood is exhausting smoke, the cover will open the flue mouth to exhaust smoke. However, in order to facilitate the exhaust of the range hood, the cover is usually not set very tightly, and there are flammable materials such as oil stains in the flue that are not cleaned. Once a fire occurs in the kitchen, if an open flame enters the flue, it is very easy to ignite the combustibles in the flue, and accompanied by the chimney effect, it will cause a wider range of harm, which needs to be improved. Utility Model Content
[0004] The utility model aims to provide a flue fire prevention device for preventing fire from spreading from the flue and reducing the harm of fire to buildings and personnel in view of the above problems.
[0005] In order to achieve the above-mentioned purpose, the utility model discloses a flue fire prevention device, including a device body, a chimney extending forward is provided on the front side of the device body, a smoke channel for smoke to pass through is provided in the chimney, and its structural characteristics are: a cover plate is hinged at the rear of the device body, a first torsion spring is installed on the device body forcing the cover plate to rotate and using the cover plate to close the rear opening of the smoke channel, a pressure rod is hinged at the rear of the cover plate, a second torsion spring is installed on the device body, which presses against the rear of the pressure rod and forces the pressure rod to push the cover plate to close the rear opening of the smoke channel, and a bimetallic strip is installed on the device body for limiting the second torsion spring, forcing the second torsion spring to disengage from the pressure on the pressure rod and releasing the second torsion spring when heated.
[0006] When a fire occurs in the kitchen, the bimetallic strip is deformed by heat and releases the second torsion spring, causing the pressure rod and the cover to enter a closed state. The first torsion spring and the second torsion spring work together to keep the cover closed, thereby sealing the smoke passage, preventing open flames from entering the building flue, preventing the spread of smoke and flames, and reducing the harm of fire to buildings and personnel.
[0007] A base plate is installed at the rear of the device body, a first rotating shaft is installed on the base plate, the cover plate is hinged to the device body through the first rotating shaft, a first torsion spring is sleeved on the first rotating shaft, and two force points of the first torsion spring are respectively located at the lower side of the base plate and the rear of the cover plate. The rear of the device body is connected to the cover plate by a hinged manner, so that the cover plate can rotate flexibly. When the kitchen range hood is normally exhausted, the cover plate can overcome the resistance of the first torsion spring, and has good flexibility and practicality.
[0008] A second rotating shaft is installed on the base plate, and the second rotating shaft is behind the first rotating shaft. The pressure rod is hinged on the device body through the second rotating shaft, and the second torsion spring is sleeved on the second rotating shaft. When the smoke passage needs to be closed, the second torsion spring can provide additional force to help the pressure rod push the cover plate to more tightly close the smoke passage opening, further enhancing the fireproof performance of the device.
[0009] A heat-conducting seat is installed on the base plate, and the heat-conducting seat is located behind the second rotating shaft. The bimetallic strip is installed on the heat-conducting seat. The second torsion spring is compressed to store force, and one end of the second torsion spring is pressed against the lower side of the base plate, and the other end of the second torsion spring is pressed against the bimetallic strip. When a fire occurs, heat is transferred to the bimetallic strip through the heat-conducting seat and the airflow, and the bimetallic strip can be deformed after being heated, thereby releasing the second torsion spring.
[0010] The bimetallic strip is provided with a stop edge for limiting the second torsion spring, which further improves the stability of the device and prevents the second torsion spring from being separated from the bimetallic strip under normal circumstances.
[0011] In order to make the entire structure more compact and stable, the pressure rod is in a U shape, and a pressure plate for cooperating with the second torsion spring is arranged on the upper part of the pressure rod.
[0012] Preferably, the pressing plate is provided with an ear plate for connecting the second rotating shaft. The force bearing point of one end of the second torsion spring is located on the pressing plate.
[0013] In order to prevent smoke from leaking from the gap between the device and the wall, a sealing gasket is provided at the rear of the device body for fitting against the wall.
[0014] To sum up, the beneficial effect of the utility model is that when a fire occurs in the kitchen, the bimetallic strip is deformed by heat, releasing the second torsion spring, causing the pressure rod and the cover plate to enter a closed state. The first torsion spring and the second torsion spring work together to keep the cover plate in a closed state, thereby closing the smoke passage, preventing open flames from entering the building flue, preventing smoke and flames from spreading over a larger area, and reducing the harm of fire to buildings and personnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;
[0016] Figure 2 for Figure 1 A local enlarged structural diagram of point A in the middle;
[0017] Figure 3 It is a rear view structural schematic diagram of the device;
[0018] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure of point B in the middle.
[0019] In the figure: device body 1, smoke channel 2, base plate 3, first torsion spring 4, second torsion spring 5, bimetallic strip 6, heat-conducting seat 7, pressure rod 8, sealing gasket 9, chimney 10, cover plate 11, first rotating shaft 12, second rotating shaft 13, stop edge 14, pressure plate 15, ear plate 16. DETAILED DESCRIPTION
[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0021] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0022] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.
[0023] In the description of this application, 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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 this application can be understood according to specific circumstances.
[0024] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.
[0025] A flue fire prevention device comprises a device body 1, a chimney 10 extending forward is provided on the front side of the device body 1, a smoke passage 2 for smoke to pass through is provided in the chimney 10, a cover plate 11 is hingedly connected to the rear of the device body 1, a first torsion spring 4 for pressing the cover plate 11 to rotate and closing the rear opening of the smoke passage 2 by the cover plate 11 is installed on the device body 1, a pressure rod 8 is hingedly connected to the rear of the cover plate 11, a second torsion spring 5 is installed on the device body 1 to press against the rear of the pressure rod 8 and force the pressure rod 8 to push the cover plate 11 to close the rear opening of the smoke passage 2, a bimetallic strip 6 is installed on the device body 1 to limit the second torsion spring 5, force the second torsion spring 5 to disengage from the pressure on the pressure rod 8, and release the second torsion spring 5 when heated, and when the bimetallic strip 6 limits the second torsion spring 5, the pressure rod 8 is in a free movement state.
[0026] See attached Figure 1 When a fire occurs in the kitchen, the bimetallic strip 6 is deformed by heat, releasing the second torsion spring 5, causing the pressure rod 8 and the cover plate 11 to enter a closed state. The first torsion spring 4 and the second torsion spring 5 work together to keep the cover plate 11 in a closed state, thereby closing the smoke passage 2, preventing open flames from entering the building flue, preventing the spread of smoke and flames, and reducing the harm of fire to buildings and personnel.
[0027] See attached Figure 2 The rear part of the device body 1 is provided with a base plate 3, a first rotating shaft 12 is provided on the base plate 3, the cover plate 11 is hinged on the device body 1 through the first rotating shaft 12, the first torsion spring 4 is sleeved on the first rotating shaft 12, and the two force points of the first torsion spring 4 are respectively located at the lower side of the base plate 3 and the rear part of the cover plate 11. The rear part of the device body 1 is connected to the cover plate 11 by a hinged manner, so that the cover plate 11 can rotate flexibly. When the kitchen range hood is normally exhausted, the cover plate 11 can overcome the resistance of the first torsion spring 4, and has good flexibility and practicality. The base plate 3 is provided with a second rotating shaft 13, the second rotating shaft 13 is behind the first rotating shaft 12, the pressure rod 8 is hinged on the device body 1 through the second rotating shaft 13, and the second torsion spring 5 is sleeved on the second rotating shaft 13. When the smoke channel 2 needs to be closed, the second torsion spring 5 can provide additional force to help the pressure rod 8 push the cover plate 11 to more tightly close the smoke channel 2, further enhancing the fireproof performance of the device. A heat-conducting seat 7 is mounted on the substrate 3, and the heat-conducting seat 7 is located behind the second rotating shaft 13. The bimetallic strip 6 is mounted on the heat-conducting seat 7. The second torsion spring 5 is compressed to store force, and one end of the second torsion spring 5 is pressed against the lower side of the substrate 3, and the other end of the second torsion spring 5 is pressed against the bimetallic strip 6. When a fire occurs, heat is transferred to the bimetallic strip 6 through the heat-conducting seat 7 and the airflow, and the bimetallic strip 6 can be deformed after being heated, thereby releasing the second torsion spring 5. A stop edge 14 for limiting the second torsion spring 5 is provided on the bimetallic strip 6. The stop edge 14 further improves the stability of the device, and prevents the second torsion spring 5 from being separated from the limit of the bimetallic strip 6 under normal conditions.
[0028] See attached Figure 1 In order to make the whole structure more compact and stable, the pressure rod 8 is in a U shape, and a pressure plate 15 for matching the second torsion spring 5 is provided on the upper part of the pressure rod 8. An ear plate 16 for connecting the second rotating shaft 13 is provided on the pressure plate 15. The force point of one end of the second torsion spring 5 is located on the pressure plate 15. In order to prevent smoke from leaking from the gap between the device and the wall, a sealing gasket 9 for fitting the wall is provided at the rear of the device body 1.
[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A flue fire prevention device, comprising a device body (1), wherein a smoke pipe (10) extending forward is provided at the front side of the device body (1), and a smoke passage (2) for smoke to pass through is provided in the smoke pipe (10), characterized in that: A cover plate (11) is hingedly connected to the rear of the device body (1). A first torsion spring (4) is installed on the device body (1) to press the cover plate (11) to rotate and to use the cover plate (11) to close the rear opening of the smoke passage (2). A pressure rod (8) is hingedly connected to the rear of the cover plate (11). A second torsion spring (5) is installed on the device body (1) to press against the rear of the pressure rod (8) to force the pressure rod (8) to push the cover plate (11) to close the rear opening of the smoke passage (2). A bimetallic strip (6) is installed on the device body (1) to limit the second torsion spring (5) to force the second torsion spring (5) to disengage from the pressure on the pressure rod (8) and to release the second torsion spring (5) when heated.
2. The flue fire protection device according to claim 1, characterized in that: A base plate (3) is installed at the rear of the device body (1), a first rotating shaft (12) is installed on the base plate (3), the cover plate (11) is hinged to the device body (1) via the first rotating shaft (12), a first torsion spring (4) is sleeved on the first rotating shaft (12), and two force points of the first torsion spring (4) are respectively located at the lower side of the base plate (3) and the rear of the cover plate (11).
3. The flue fire protection device according to claim 2, characterized in that: A second rotating shaft (13) is mounted on the base plate (3), the second rotating shaft (13) is located behind the first rotating shaft (12), the pressure rod (8) is hinged to the device body (1) via the second rotating shaft (13), and the second torsion spring (5) is sleeved on the second rotating shaft (13).
4. The flue fire protection device according to claim 3, characterized in that: A heat-conducting seat (7) is mounted on the base plate (3), the heat-conducting seat (7) is located behind the second rotating shaft (13), the bimetallic strip (6) is mounted on the heat-conducting seat (7), the second torsion spring (5) is compressed to store force and one end of the second torsion spring (5) is pressed against the lower side of the base plate (3), and the other end of the second torsion spring (5) is pressed against the bimetallic strip (6) and is engaged therewith.
5. The flue fire protection device according to claim 4, characterized in that: The bimetallic strip (6) is provided with a stop edge (14) for limiting the position of the second torsion spring (5).
6. The flue fire protection device according to claim 1, characterized in that: The pressure rod (8) is in a U shape, and a pressure plate (15) for cooperating with the second torsion spring (5) is provided on the upper part of the pressure rod (8).
7. The flue fire protection device according to claim 6, characterized in that: The pressing plate (15) is provided with a lug plate (16) for connecting to the second rotating shaft (13).
8. The flue fire protection device according to claim 1, characterized in that: The rear part of the device body (1) is provided with a sealing pad (9) for fitting against a wall.