A fire damper with high fire safety

Abstract

The present invention discloses a fire damper with high fire safety, comprising an air inlet duct and an air outlet duct, the rear end of the air inlet duct is connected with the lower part of the air outlet duct, the front end face of the air inlet duct is the air inlet, and the top end face of the air outlet duct is the air outlet; the air inlet duct and the air outlet duct are designed at an angle; the air inlet duct and the air outlet duct are integrally formed; a fireproof cover is provided at the air outlet, and a high-temperature fuse is provided at the connection between the fireproof cover and the air outlet; the fireproof cover is in a normally open state, and when the high-temperature fuse is disconnected, the fireproof cover falls and closes the air outlet. The fire damper of the present invention has the characteristics of good sealing performance, high fire safety, simple production process steps, smooth smoke discharge in the public flue, and increased indoor smoke discharge speed.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a fire damper with high fire safety. Background Art

[0002] Public flues are usually installed in high-rise residential buildings in cities. Fire dampers are installed in public installations for indoor range hood exhaust. Existing fire dampers are composed of a body and a panel. The body has an air inlet and an air outlet. The body is roughly rectangular to facilitate the installation of the fireproof cover. In some cases, the air inlet is set on the panel. The roughly rectangular body of the fire damper is formed by welding or riveting multiple metal plates. This connection method not only consumes a lot of labor but also makes it difficult to ensure the sealing effect.

[0003] Multiple fire dampers are installed in the same public flue of a high-rise residential building. The smoke is discharged from the lower right to the top. The roughly rectangular fire damper body has a greater obstruction effect on the smoke, and the smoke is not discharged smoothly.

[0004] The fire damper is equipped with a fire cover. The lower part of the existing fire cover is hinged to the fire damper body, and the upper end is connected to the panel through two connectors, one of which is a high-temperature fuse material. When the fire damper is installed, the panel is close to the wall. This method of fixing the fire cover allows the panel to have a larger area, and the public flue needs to have a larger installation hole, which places higher requirements on the fire damper installation structure. At the same time, after the fire cover is closed due to the high temperature, if gas enters the air inlet, the fire cover will still be pushed open, and the safety performance needs to be strengthened. Summary of the invention

[0005] The purpose of the present invention is to provide a fire damper with high fire safety, which has the characteristics of good sealing effect and high safety performance.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A fire damper with high fire safety, comprising an air inlet duct and an air outlet duct, wherein the rear end of the air inlet duct is connected to the lower part of the air outlet duct, the front end surface of the air inlet duct is an air inlet, and the top end surface of the air outlet duct is an air outlet; the air inlet duct and the air outlet duct are designed to be at an angle; the air inlet duct and the air outlet duct are integrally formed;

[0008] A fireproof cover is provided at the air outlet, and a high-temperature fuse is provided at the connection between the fireproof cover and the air outlet; the fireproof cover is in a normally open state, and when the high-temperature fuse is disconnected, the fireproof cover falls down and closes the air outlet.

[0009] Furthermore, the fireproof cover is provided with a telescopic device, the fireproof cover is rotatably connected to the top of the air outlet duct through a rotating shaft, the rotating shaft sleeve is provided with a spring, one end of the spring is fixed to the rotating shaft, and the other end is connected to one end of the high-temperature fuse, and the other end of the high-temperature fuse is fixedly connected to the telescopic device;

[0010] The air outlet is provided with a card slot corresponding to the position of the telescopic device; when the high-temperature fuse is disconnected, the telescopic device extends from the fireproof cover and is inserted into the card slot.

[0011] Furthermore, the telescopic device includes a tongue and a telescopic spring, the fireproof cover has a limiting portion, the tail end of the tongue has a connecting rod, one end of the connecting rod is connected to the tongue, and the other end passes through the limiting portion and is connected to the high-temperature fuse, the telescopic spring is sleeved on the connecting rod, one end of the telescopic spring is against the tail end of the tongue, and the other end is against the limiting portion.

[0012] Furthermore, the slot is formed by a curled edge at the top of the air outlet duct.

[0013] Furthermore, the air inlet duct and the air outlet duct are both made of metal, and the air inlet duct and the air outlet duct are integrally formed through a stretching process.

[0014] Furthermore, the air outlet duct has an extension section, which is located above the air inlet, and the extension section and the air outlet duct are integrally formed.

[0015] Furthermore, the bottom end surface of the air outlet duct is roughly hemispherical, and the connection between the air inlet duct and the air outlet duct is located above the bottom end surface.

[0016] Furthermore, a spring device and a rotatable air inlet cover are provided at the air inlet, one end of the spring device is connected to a side of the air inlet cover, and the other end of the spring device is connected to the inner wall of the air inlet duct. The spring device is located on the side of the air inlet cover away from the air outlet duct, and the air inlet cover can be opened toward the air outlet duct.

[0017] Furthermore, the opening of the air inlet cover is 40°-50°.

[0018] Furthermore, the shape of the air outlet is circular, elliptical, semicircular, square or trapezoidal.

[0019] The beneficial effects of the present invention are:

[0020] 1. The air inlet duct and the air outlet duct of the present invention are integrally formed, which greatly simplifies the fire damper forming process, improves production efficiency and reduces labor intensity. At the same time, the integral forming method greatly improves the sealing performance of the fire damper body, can prevent smoke backflow and improve fire safety.

[0021] 2. A lockable fireproof cover is installed at the air outlet. When a fire occurs, the fireproof cover can seal the air outlet to prevent smoke from entering the room, better prevent smoke backflow, and improve fire safety. At the same time, the high-temperature fuse is installed at the connection between the fireproof cover and the air outlet, which greatly saves the installation space required for the fire damper and simplifies the installation difficulty.

[0022] 3. The bottom of the anti-slip valve is roughly hemispherical, which greatly reduces the resistance to smoke in the public flue and improves the smoothness of smoke discharge.

[0023] 4. An extended section is set in the air outlet channel to increase the length of the air outlet channel, produce a chimney effect, and increase the speed of indoor smoke emission.

[0024] The fire damper of the present invention solves the deficiencies in the assembly process and structural design of various existing fire dampers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a fire damper according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of the fire damper from another perspective is shown;

[0027] Figure 3 yes Figure 1 The structural schematic diagram of the fire damper spring device shown;

[0028] Figure 4 yes Figure 1 The structural schematic diagram of the fire damper telescopic device shown;

[0029] Among them, there are the air inlet duct 1, the air outlet duct 2, the fireproof cover 3, the telescopic device 4, the spring device 5, the air inlet cover 6, the air inlet 11, the air outlet 21, the extension section 22, the bottom end surface 23, the high-temperature fuse 31, the rotating shaft 32, the spring 33, the abutment sheet 34, the tongue 41, the telescopic spring 42, the connecting rod 51, the fixing seat 52 and the switch spring 53. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0031] like Figure 1-4 As shown, the present invention provides a fire damper with high fire safety, comprising an air inlet duct 1 and an air outlet duct 2, the rear end of the air inlet duct 1 is connected to the lower part of the air outlet duct 2, the front end surface of the air inlet duct 1 is an air inlet 11, and the top end surface of the air outlet duct 2 is an air outlet 21; the air inlet duct 1 and the air outlet duct 2 are designed to be at an angle; the air inlet duct 1 and the air outlet duct 2 are integrally formed;

[0032] A fireproof cover 3 is provided at the air outlet 2 , and a high-temperature fuse 31 is provided at the connection between the fireproof cover 3 and the air outlet 2 ; the fireproof cover 3 is in a normally open state, and when the high-temperature fuse 31 is disconnected, the fireproof cover 3 falls down and closes the air outlet 21 .

[0033] The air inlet duct 1 and the air outlet duct 2 of the present invention are integrally formed, which greatly simplifies the fire damper forming process, improves production efficiency and reduces labor intensity. At the same time, the integral forming method greatly improves the sealing performance of the fire damper body, can prevent smoke backflow and improve fire safety.

[0034] The high temperature fuse 31 is arranged at the connection between the fire cover 3 and the air outlet 21, which greatly saves the installation space required for the fire damper and simplifies the installation difficulty. At the same time, the connection between the fire cover 3 and the air outlet 21 and the air inlet duct 1 are located on the same side of the air outlet duct 2, making the structure of the fire damper more reasonable and reducing the resistance of the fire cover 3 to the air flow in the public flue.

[0035] Furthermore, the fireproof cover 3 is provided with a telescopic device 4, and the fireproof cover 3 is rotatably connected to the top of the air outlet duct 2 through a rotating shaft 32, and a spring 33 is sleeved on the rotating shaft 32, one end of the spring 33 is fixed to the rotating shaft 32, and the other end is connected to one end of the high-temperature fuse 31, and the other end of the high-temperature fuse 31 is fixedly connected to the telescopic device 4;

[0036] The air outlet 21 is provided with a slot corresponding to the position of the telescopic device 4; when the high-temperature fuse 31 is disconnected, the telescopic device 4 extends from the fireproof cover 3 and is inserted into the slot.

[0037] When the fire damper is in normal use, the fire cover 3 is in an open state, and the telescopic device 4 is entirely located inside the fire cover 3 or on the bottom surface of the fire cover 3. When a fire occurs, the high-temperature fuse 31 is disconnected, releasing the spring 33 and the telescopic device 4, so that the fire cover 3 covers the air outlet 21. Since the fire cover 3 is subjected to the force of the spring 33, there is enough downward power to make the telescopic device 4 snap into the slot, and the spring 33 plays a role in pushing the fire cover 3. The present invention sets a lockable fire cover 3 at the air outlet 231. When a fire occurs, the fire cover 3 can seal the air outlet 21 to prevent smoke from entering the room, thereby improving fire safety.

[0038] The fireproof cover 3 and the rotating shaft 32 are matched at a position where abutting pieces 34 are provided. The abutting pieces abut against the outer wall of the air outlet duct 2 to limit the opening of the fireproof cover 3 .

[0039] Furthermore, the telescopic device 4 includes a tongue 41 and a telescopic spring 42, the fireproof cover 3 has a limit portion, the tail end of the tongue has a connecting rod, one end of the connecting rod is connected to the tongue, and the other end passes through the limit portion and is connected to the high-temperature fuse 31, the telescopic spring 42 is sleeved on the connecting rod, one end of the telescopic spring 42 abuts against the tail end of the tongue 41, and the other end abuts against the limit portion. The telescopic device 4 has a simple structure and high reliability.

[0040] Furthermore, the slot is formed by the curling edge at the top end of the air outlet duct 2, which further simplifies the structure of the fire damper.

[0041] Furthermore, the air inlet duct 1 and the air outlet duct 2 are both made of metal, and the air inlet duct 1 and the air outlet duct 2 are integrally formed through a stretching process, so that the overall structure of the fire damper has high reliability. When forming through the stretching process, a metal plate cut to a preset size is placed in a mold, and pressure is applied to the mold to form the metal sheet. After forming, a gap is formed on the side of the air outlet duct 2 away from the air inlet duct 1, and the gap is welded and fixed to obtain the body of the fire damper. The entire process is simple and easy to operate.

[0042] Furthermore, the air outlet duct 2 has an extension section 22, which is located above the air inlet 11, and the extension section 22 and the air outlet duct 2 are integrally formed. The air outlet duct 2 is provided with an extension section, which increases the length of the air outlet duct 2, produces a chimney effect, and increases the speed of indoor smoke emission. The cross-sectional area of ​​the air outlet duct 2 gradually decreases from the lower right to the upper side, further enhancing the chimney effect.

[0043] Furthermore, the bottom end surface 23 of the air outlet duct 2 is roughly hemispherical, and the connection between the air inlet duct 1 and the air outlet duct 2 is located above the bottom end surface 23. The bottom of the anti-slip valve is roughly hemispherical, which greatly reduces the resistance to the smoke in the public flue and improves the smoothness of smoke discharge.

[0044] Furthermore, a spring device 5 and a rotatable air inlet cover 6 are provided at the air inlet 11, one end of the spring device 5 is connected to a side of the air inlet cover 6, and the other end of the spring device 5 is connected to the inner wall of the air inlet duct 1. The spring device 5 is located on the side of the air inlet cover 6 away from the air outlet duct 2, and the air inlet cover 6 can be opened toward the air outlet duct 2. When there is airflow pressure at the air inlet 1, the air inlet cover 6 is pushed and the air inlet 1 is opened. When there is no airflow, the air inlet cover 6 is automatically closed under the action of the spring device 5.

[0045] The spring device 5 includes a connecting rod 51, a fixing seat 52 and a switch spring 53. One end of the connecting rod 51 is rotatably connected to the air inlet cover 6, and the other end is rotatably connected to the fixing seat 52. The switch spring 53 is arranged at the connection between the connecting rod 51 and the fixing seat 52. The fixing seat 52 is fixed to the inner wall of the air inlet duct 1.

[0046] Further, the opening of the air inlet cover 6 is 40°-50°. Preferably, the opening of the air inlet cover 6 is 45°, which has a better guiding effect on the airflow.

[0047] Further, the shape of the air outlet 21 is circular, elliptical, semicircular, square or trapezoidal. Preferably, the air outlet 21 is circular. The air inlet duct is cylindrical, and the air inlet and the air inlet cover are both circular, and the air inlet cover can completely cover the air inlet.

[0048] The outer side of the air inlet duct is provided with a mounting plate to facilitate the installation of the fire damper. The mounting plate is fixedly connected to the outer wall of the air inlet duct by welding.

[0049] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A fire damper with high fire safety, characterized in that: It comprises an air inlet duct and an air outlet duct, the rear end of the air inlet duct is connected to the lower part of the air outlet duct, the front end surface of the air inlet duct is the air inlet, and the top end surface of the air outlet duct is the air outlet; the air inlet duct and the air outlet duct are designed to be at an angle; the air inlet duct and the air outlet duct are integrally formed; A fireproof cover is provided at the air outlet, and a high-temperature fuse is provided at the connection between the fireproof cover and the air outlet; the fireproof cover is in a normally open state, and when the high-temperature fuse is disconnected, the fireproof cover falls down and closes the air outlet; The fireproof cover is provided with a telescopic device, the fireproof cover is rotatably connected to the top of the air outlet duct through a rotating shaft, the rotating shaft sleeve is provided with a spring, one end of the spring is fixed to the rotating shaft, and the other end is connected to one end of the high-temperature fuse, and the other end of the high-temperature fuse is fixedly connected to the telescopic device; The air outlet is provided with a slot corresponding to the position of the telescopic device; when the high-temperature fuse is disconnected, the telescopic device extends from the fireproof cover and is inserted into the slot; A spring device and a rotatable air inlet cover are provided at the air inlet, one end of the spring device is connected to a side of the air inlet cover, and the other end of the spring device is connected to the inner wall of the air inlet duct. The spring device is located on a side of the air inlet cover away from the air outlet duct, and the air inlet cover can be opened toward the air outlet duct; The opening degree of the air inlet cover is 40°-50°.

2. The fire damper with high fire safety according to claim 1, characterized in that: The telescopic device includes a tongue and a telescopic spring. The fireproof cover has a limiting portion. The tail end of the tongue has a connecting rod. One end of the connecting rod is connected to the tongue, and the other end passes through the limiting portion and is connected to the high-temperature fuse. The telescopic spring is sleeved on the connecting rod, and one end of the telescopic spring abuts against the tail end of the tongue, and the other end abuts against the limiting portion.

3. The fire damper with high fire safety according to claim 1, characterized in that: The clamping groove is formed by the curling edge at the top end of the air outlet duct.

4. The fire damper with high fire safety according to claim 1, characterized in that: The air inlet duct and the air outlet duct are both made of metal, and the air inlet duct and the air outlet duct are integrally formed through a stretching process.

5. The fire damper with high fire safety according to claim 1, characterized in that: The air outlet duct has an extension section, the extension section is located above the air inlet, and the extension section and the air outlet duct are integrally formed.

6. The fire damper with high fire safety according to claim 1, characterized in that: The bottom end surface of the air outlet duct is roughly hemispherical, and the connection between the air inlet duct and the air outlet duct is located above the bottom end surface.

7. The fire damper with high fire safety according to claim 1, characterized in that: The shape of the air outlet is circular, elliptical, semicircular, square or trapezoidal.

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