Novel fire-preventing check valve with support for discharging oil fume

Abstract

The utility model discloses a novel fume exhaust fireproof check valve with support, including connecting plate, the middle part fixed setting of connecting plate has the valve body, the utility model discloses a novel fume exhaust fireproof check valve with support, this fireproof check valve sets up the support through being arranged in the valve body one side, and installs the fuse link and torsional spring subassembly on the support, forms the stable mechanical linkage structure, when fume exhaust pipeline normal work, the fuse wire holds the force arm and makes the valve cover keep open state, ensures the fume to go out smoothly, and when the high temperature or flame appears in the pipeline, the fuse link melts rapidly, and the movable end of first torsional spring overturns downward, through the force arm to the valve cover and exert the downward force, thereby closes the valve body, realizes the fireproof check function, the cover enhances the fire safety, can effectively block the flame injection, satisfies the flow demand of fume exhaust, responds rapidly when the fire hazard appears, provides reliable security guarantee for kitchen etc. fume exhaust environment.

Description

Technical Field

[0001] This utility model relates to the field of oil fume technology, specifically a novel oil fume fireproof check valve with a bracket. Background Technology

[0002] In high-rise residential buildings and apartment buildings, shared exhaust ducts for cooking fumes, smoke, and gas are designed and installed. Kitchen fumes and bathroom odors from each household are discharged through these shared ducts. During the discharge process, it is necessary to prevent backflow of oil, smoke, and gas, and also to prevent fire hazards caused by grease buildup in the shared ducts. Currently, most fire-resistant check valves for cooking fumes and gas on the market suffer from insufficient structural stability and slow fire response. Traditional products often use a single spring-reset structure, which is prone to spring fatigue after long-term use, leading to incomplete valve closure and affecting the fire-resistant check valve effect. Some products lack effective flame-blocking designs, allowing flames to easily spread through valve body gaps when a fire occurs in the duct, increasing safety hazards. Furthermore, the installation structure of existing check valves is relatively complex, and the connection to the exhaust duct is not secure enough, making them prone to loosening under long-term vibration or high-temperature environments, reducing the overall lifespan and reliability of the device. In addition, some fire-resistant check valves have insufficient sensitivity in their fusible links, failing to quickly trigger the closing mechanism in the early stages of a fire, resulting in delayed fire protection and failing to meet the safety requirements of complex environments such as modern kitchens. Utility Model Content

[0003] The purpose of this invention is to provide a novel fireproof check valve for exhaust gas with a support bracket, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel fireproof check valve for exhaust gas with a bracket, comprising a connecting plate, a valve body fixedly mounted in the middle of the connecting plate, a valve cover mounted on the top of the valve body, a rotating seat fixedly connected to the top of the valve cover, a first pin fixedly mounted on the top of the rotating seat, a lever arm rotatably connected to the rotating seat via the first pin, a slot being provided on the other side of the top of the lever arm, a bracket fixedly mounted on the top of one side of the valve body, a second pin fixedly mounted on the top of the bracket, a fusible link fixedly connected to the bracket via the second pin, a third pin and a fourth pin fixedly connected sequentially from top to bottom on one side of the bracket, a lever arm rotatably connected to the fourth pin at the end opposite to the rotating seat, a first torsion spring sleeved on the third pin, a second torsion spring sleeved on the fourth pin, the middle of the first torsion spring connected to the bottom of the fusible link, the middle of the second torsion spring engaging with the slot, and a cover positioned above the valve body covering the top of the connecting plate.

[0005] Preferably, a sealing ring is fixedly provided on the outer ring of the top of the connecting plate.

[0006] Preferably, snap rings are fixedly installed on both sides of the top of the connecting plate.

[0007] Preferably, an integral side strip is fixedly provided on both sides of the bottom of the cover, and two fixing holes are provided on each of the two side strips.

[0008] Preferably, both ends of the first torsion spring are connected to the bracket, and both ends of the second torsion spring are connected to the bracket.

[0009] Preferably, the lever arm is located in the gap in the middle of the second torsion spring.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This fireproof check valve forms a stable mechanical linkage structure by setting a bracket on one side of the valve body and installing a fusible link and a torsion spring assembly on the bracket; when the exhaust gas duct is working normally, the exhaust gas pushes up the valve cover under the action of air pressure, overcoming the weight of the valve cover and the torsion of the second torsion spring, ensuring that the exhaust gas is discharged smoothly; when high temperature or flame appears in the duct, the fusible link melts quickly, the first torsion spring releases its torsion, the movable end of the first torsion spring flips downward, and finally contacts the lever arm and applies a downward force to the lever arm, thereby applying a downward force to the valve cover through the lever arm, thus closing the valve body and realizing the fireproof check function; the cover design further enhances fire safety, can effectively block flame jets, meet the flow requirements of exhaust gas, and respond quickly when fire hazards occur, providing reliable safety protection for kitchens and other exhaust gas environments. Attached Figure Description

[0011] Figure 1 The three-dimensional representation of this utility model Figure 1 ;

[0012] Figure 2 The three-dimensional representation of this utility model Figure 2 ;

[0013] Figure 3 This is a perspective view of the connecting plate and valve body of this utility model;

[0014] Figure 4 This is a bottom view of the connecting plate and valve body of this utility model;

[0015] Figure 5 This is a top view of the connecting plate and valve body of this utility model;

[0016] Figure 6 This is a schematic diagram of the structure of the cover of this utility model;

[0017] Figure 7 This is a side view of the lever arm of this utility model in its normal state.

[0018] In the diagram: 1. Connecting plate; 2. Valve body; 3. Valve cover; 4. Cover; 5. Bracket; 6. Sealing ring; 7. Fusible link; 8. Lever arm; 9. Snap ring; 10. Side strip; 11. Rotary seat; 12. First pin; 13. Snap groove; 14. Second torsion spring; 15. First torsion spring; 16. Third pin; 17. Fourth pin; 18. Second pin. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] Please see Figure 1-7 This utility model provides a novel fireproof check valve for exhaust gas with a bracket, including a connecting plate 1. A valve body 2 is fixedly mounted in the middle of the connecting plate 1. A valve cover 3 is mounted on the top of the valve body 2. A rotating seat 11 is fixedly connected to the top of the valve cover 3. A first pin 12 is fixedly mounted on the top of the rotating seat 11. A force arm 8 is rotatably connected to the rotating seat 11 through the first pin 12. A slot 13 is provided on the other side of the top of the force arm 8. A bracket 5 is fixedly mounted on the top of one side of the valve body 2. A second pin 18 is fixedly mounted on the top of the bracket 5. A fusible link 7 is fixedly connected to the bracket 5 through the second pin 18. A third pin 16 and a fourth pin 17 are fixedly connected sequentially from top to bottom on one side of the bracket 5. The end of the force arm 8 away from the rotating seat 11 is rotatably connected to the fourth pin 17. A first torsion spring 15 is sleeved on the third pin 16, and a second torsion spring 14 is sleeved on the fourth pin 17. The middle part of the first torsion spring 15 is connected to the bottom of the fuse piece 7, and the middle part of the second torsion spring 14 is engaged with the slot 13. The connecting plate 1 is installed and fixed on the exhaust gas duct. The valve body 2 is located at the channel opening of the exhaust gas duct, which is a flat opening. The second torsion spring 14 applies a downward force to the lever arm 8, which in turn applies a downward force to the valve cover 3. Under the action of the torque of the second torsion spring 14 and the gravity of the valve cover 3, the valve cover 3 covers the valve body 2. When the flue gas reaches the valve body 2, it pushes up the valve cover 3 under the action of air pressure. The second torsion spring 14 deforms, so that the flue gas passes through the valve body 2. When the high-temperature gas flow or flame is discharged through the valve body 2, the fuse piece 7 melts, the first torsion spring 15 releases its torque, and the movable end of the first torsion spring 15 flips downward until it contacts the lever arm 8, applying a downward force to the lever arm 8, so that the valve cover 3 tightly covers the valve body 2, thereby closing the valve body 2 for flame retardancy and achieving the function of fire prevention.

[0021] The top of the connecting plate 1 is covered with a cover 4 located above the valve body 2. Both sides of the bottom of the cover 4 are fixedly provided with an integral side strip 10. Two fixing holes are opened on each side strip 10. The cover 4 is fixedly connected to the connecting plate 1 by screws passing through the fixing holes on the two side strips 10, thereby fixing the cover 4 to the connecting plate 1. The cover 4 covers the valve body 2, blocking the sprayed flame and improving the safety protection performance.

[0022] A sealing ring 6 is fixedly installed on the outer ring of the top of the connecting plate 1, and snap rings 9 are fixedly installed on both sides of the top of the connecting plate 1. The sealing ring 6 plays a sealing role, and the snap rings 9 play a fixing role.

[0023] Both ends of the first torsion spring 15 are connected to the bracket 5, and both ends of the second torsion spring 14 are connected to the bracket 5. The lever arm 8 is located in the gap in the middle of the second torsion spring 14.

[0024] In this embodiment, the valve body 2 is fixed with a fusible link 7 by a bracket 5, and the lever arm 8 is connected to the valve cover 3 by a rotating seat 11. Under the action of the torque of the second torsion spring 14 and the gravity of the valve cover 3, the valve cover 3 covers the valve body 2. When the exhaust gas duct is working normally, the flue gas reaches the valve body 2 and pushes up the valve cover 3 under the action of air pressure, so that the flue gas flows through the valve body 2 and the valve cover 3 and is discharged. When the high temperature gas flow or flame is discharged through the valve body 2 and reaches the design temperature, the fusible link 7 that fixes the first torsion spring 15 melts, the first torsion spring 15 releases the torque, and the movable end of the first torsion spring 15 flips downward until it contacts the lever arm 8, applying a downward force to the lever arm 8, so that the valve cover 3 tightly covers the valve body 2, thereby closing the valve body 2 for flame retardancy and achieving the fireproof function. The cover 4 covers the valve body 2 to block the jet flame and improve the safety protection performance.

[0025] Although the present invention has been described in detail with reference to the foregoing 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. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A new type of fire smoke exhaust gas fire prevention check valve with a support, comprising a connecting plate (1), characterized in that: A valve body (2) is fixedly installed in the middle of the connecting plate (1). A valve cover (3) is installed on the top of the valve body (2). A rotating seat (11) is fixedly connected to the top of the valve cover (3). A first pin (12) is fixedly installed on the top of the rotating seat (11). The rotating seat (11) is rotatably connected to a lever arm (8) through the first pin (12). A slot (13) is opened on the other side of the top of the lever arm (8). A bracket (5) is fixedly installed on the top of one side of the valve body (2). A second pin (18) is fixedly installed on the top of the bracket (5). The bracket (5) is fixedly secured by the second pin (18). A fuse (7) is fixedly connected. A third pin (16) and a fourth pin (17) are fixedly connected to one side of the bracket (5) from top to bottom. The end of the lever arm (8) away from the rotating seat (11) is rotatably connected to the fourth pin (17). A first torsion spring (15) is sleeved on the third pin (16), and a second torsion spring (14) is sleeved on the fourth pin (17). The middle part of the first torsion spring (15) is connected to the bottom of the fuse (7), and the middle part of the second torsion spring (14) is engaged with the slot (13). The top of the connecting plate (1) is covered with a cover (4) located above the valve body (2).

2. A novel fire smoke exhaust back check valve with a bracket according to claim 1, characterized in that: A sealing ring (6) is fixedly provided on the outer ring of the top of the connecting plate (1).

3. A novel fire smoke exhaust back check valve with a bracket according to claim 1, characterized in that: Both sides of the top of the connecting plate (1) are fixedly installed with snap rings (9).

4. A novel fireproof check valve for exhaust gas with a bracket according to claim 1, characterized in that: Both sides of the bottom of the cover (4) are fixedly provided with an integral side strip (10), and two fixing holes are opened on each of the two side strips (10).

5. A novel fire smoke exhaust back check valve with a bracket according to claim 1, characterized in that: Both ends of the first torsion spring (15) are connected to the bracket (5), and both ends of the second torsion spring (14) are connected to the bracket (5).

6. A novel fire smoke exhaust back check valve with a bracket according to claim 1, characterized in that: The lever arm (8) is located in the gap in the middle of the second torsion spring (14).

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