A fire damper with a flow-stopping structure

Abstract

The present invention relates to the technical field of fire dampers, and discloses a fire damper with a flow-stopping structure, including a fire damper body, wherein the upper and lower ends of the fire damper body shell are respectively fixedly provided with guide plates at the front edge positions, the upper and lower ends of the fire damper body shell are respectively fixedly provided with mounting plates near the guide plates, an L-shaped frame is fixedly provided between the guide plate and the mounting plate, a plurality of air outlets are provided at the upper end of the L-shaped frame, the upper and lower ends of the fire damper body shell are respectively provided with air vents at positions corresponding to the L-shaped frame, and the upper and lower inner walls of the fire damper body shell are respectively fixedly provided with air cavity ducts. The fire damper with a flow-stopping structure described in the present invention uses two sets of baffles to prevent external gas from entering the interior of the fire damper body and entering the place along the connected pipe to cause safety hazards, and to avoid the situation where the fire damper body cannot be used when encountering a large airflow.

Description

Technical Field

[0001] The present invention relates to the technical field of fire dampers, and in particular to a fire damper with a flow-stopping structure. Background Art

[0002] Fire dampers are usually installed in central air conditioning duct systems. The working principle is to use the temperature control of the highly fusible alloy installed on the valve, and the effect of gravity and spring mechanism. When a fire occurs, the flame invades the air duct, and the high temperature melts the fusible alloy on the valve, or causes the memory alloy to deform and automatically close the valve. It is used in occasions where the air duct and the fire partition pass through. Conventional fire dampers may face strong airflow during use, making the airflow from the outside greater than the airflow at the valve port, which is prone to backflow. When the valve body is closed directly, the gas inside the valve body cannot be effectively exhausted to the outside, resulting in failure to use normally when there is no fire. Summary of the invention

[0003] The main purpose of the present invention is to provide a fire damper with a flow-stopping structure, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A fire damper with a flow-stop structure comprises a fire damper body, wherein guide plates are fixedly provided at the upper and lower ends of a shell of the fire damper body at the front edge positions, mounting plates are fixedly provided at the upper and lower ends of the shell of the fire damper body near the guide plates, an L-shaped frame is fixedly provided between the guide plate and the mounting plate, a plurality of air outlets are provided at the upper end of the L-shaped frame, air vents are provided at the upper and lower ends of the shell of the fire damper body corresponding to the positions of the L-shaped frame, wind cavity ducts are fixedly provided on the upper and lower inner walls of the shell of the fire damper body, air inlets are provided at the rear sides of two groups of the wind cavity ducts, a mounting frame is fixedly connected between the two groups of the wind cavity ducts near the rear sides, two groups of openings are provided on the inner side of the mounting frame, shielding plates are rotatably connected at the positions of the mounting frame near the two groups of openings, and magnetic strips are fixedly provided at the front end of the mounting frame near the lower sides of the two groups of openings.

[0006] Preferably, the rear ends of the two groups of wind chamber ducts are fixedly connected with two groups of connecting shaft blocks, the inner sides of the two groups of connecting shaft blocks are movably provided with a rotating rod, the outer sides of the rotating rods are fixedly provided with a sealing plate, the rear ends of the sealing plates are fixedly installed with three groups of mounting rods, one end of the sealing plates are fixedly provided with two groups of No. 1 connecting rings, the outer sides of the two groups of No. 1 connecting rings are sleeved with double hook springs, one side of the two groups of double hook springs is sleeved with No. 2 connecting rings, the bottoms of the two groups of openings are fixedly installed with mounting strips, the upper sides of the two groups of mounting strips are respectively fixedly provided with three groups of connecting shaft seats, the upper sides of the three groups of connecting shaft seats are movably provided with top strips, the inner sides of the three groups of top strips are opened with movable openings, and the front sides of the three groups of movable openings are respectively movably provided with rollers.

[0007] Preferably, the guide plate is arranged in an arc shape, the L-shaped frame is communicated with the interior of the air cavity duct, and the air outlet corresponds to between the guide plate and the mounting plate.

[0008] Preferably, the two groups of air cavity ducts are symmetrically arranged up and down, and the two groups of baffles are respectively matched with the two groups of openings.

[0009] Preferably, the shielding plate is at the maximum angle after rotation, and the shielding plate is made of metal material.

[0010] Preferably, the connecting shaft block is located at the rear end of the air chamber duct close to the upper corner, and the sealing plate blocks the position of the air inlet.

[0011] Preferably, the three groups of mounting rods are evenly arranged laterally, and the three groups of mounting rods are rotatably connected to the three groups of top strips respectively, and the No. 1 connecting ring, the double hook spring, and the No. 2 connecting ring are located between the air cavity duct and the fire damper body.

[0012] Preferably, the No. 2 connecting ring is fixedly connected to the inner wall of the fire damper body, the connecting shaft seat is matched with the movable opening, and the top strip and the roller pass through the interior of the opening.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] When the fire damper body is in normal use, the airflow discharged outwards will blow, rotate the baffle plate connected to the installation frame, open the opening blocked by the baffle plate, and allow the fire damper body to discharge gas to the outside normally. When a larger airflow is generated in the outside and is greater than the airflow discharged from the fire damper body, the two sets of baffle plates are blown in the opposite direction, so that the two sets of baffle plates cover the front ends of the two sets of openings, and the two sets of magnetic strips magnetically attract them, preventing external gas from pouring into the interior of the fire damper body and entering the place along the connected pipes, causing safety hazards.

[0015] In order to ensure the normal use of the pipes connected to the fire damper body, when the two sets of baffles block the openings, the three sets of rollers and top strips extending from the openings will be pushed, so that the top strips slide to the rear side along the connecting shaft seat through the movable opening, and push the three sets of connected mounting rods. The movement of the mounting rods simultaneously drives the sealing plate and the rotating rod to rotate in the two sets of connecting shaft blocks. The rotation of the two sets of sealing plates on the upper and lower sides will open the two covered air inlets. At the same time, the rotating sealing plate pulls the double hook spring through the No. 1 connecting ring for elastic extension. In the absence of external airflow, the sealing plate is automatically pulled back to keep the air cavity duct in a closed state, and is discharged normally through the opening. The interior of the fire damper body is connected to the interior of the air cavity duct. At this time, the gas inside the fire damper body is discharged to the outside through the air cavity duct, thereby avoiding the situation where the fire damper body cannot be used when encountering a large airflow.

[0016] The airflow entering the two groups of wind cavity ducts is discharged to the upper and lower sides through the vents and outlets respectively. After the external airflow blows toward the fire damper body from the front, the airflow in contact with the upper and lower guide plates is guided according to the arc state of the guide plates and blows to the upper and lower sides. At the same time, the small airflow discharged from the two groups of air outlets will be sucked away by the strong airflow from the outside, and flow and be discharged along with the strong airflow from the outside, so it can work effectively in strong airflow weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a fire damper with a flow-stopping structure according to the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of a fire damper with a flow-stopping structure according to the present invention;

[0019] Figure 3 It is a schematic diagram of the upper part of the cross-section structure of a fire damper with a flow-stopping structure according to the present invention;

[0020] Figure 4 This is a schematic diagram of the internal partial structure of a fire damper with a flow-stopping structure according to the present invention;

[0021] Figure 5 It is a schematic diagram of a shielding partial structure of a fire damper with a flow-stopping structure according to the present invention;

[0022] Figure 6 A fire damper with a flow-stopping structure according to the present invention Figure 4 A schematic diagram of the enlarged structure of the middle part A;

[0023] Figure 7 It is a schematic diagram of a partially expanded structure of a fire damper with a flow-stopping structure according to the present invention;

[0024] Figure 8 A fire damper with a flow-stopping structure according to the present invention Figure 7Schematic diagram of the enlarged structure of part B in the middle.

[0025] In the figure: 1. Fire damper body; 2. Guide plate; 3. Mounting plate; 4. L-shaped frame; 5. Air outlet; 6. Air vent; 7. Air cavity duct; 8. Air inlet; 9. Mounting frame; 10. Opening; 11. Shielding plate; 12. Magnetic strip; 13. Connecting shaft block; 14. Rotating rod; 15. Sealing plate; 16. Mounting rod; 17. No. 1 connecting ring; 18. Double hook spring; 19. No. 2 connecting ring; 20. Mounting strip; 21. Connecting shaft seat; 22. Top strip; 23. Movable opening; 24. Roller. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are relative relationships of directions or positions, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] See also Figure 1-Figure 8 An embodiment of the present invention is as follows: a fire damper with a flow-stopping structure comprises a fire damper body 1, wherein guide plates 2 are fixedly arranged at the upper and lower ends of the shell of the fire damper body 1 at the front edge positions, mounting plates 3 are fixedly arranged at the upper and lower ends of the shell of the fire damper body 1 near the guide plates 2, an L-shaped frame 4 is fixedly arranged between the guide plates 2 and the mounting plate 3, a plurality of air outlets 5 are provided at the upper end of the L-shaped frame 4, air vents 6 are provided at the upper and lower ends of the shell of the fire damper body 1 corresponding to the positions of the L-shaped frame 4, air cavity ducts 7 are fixedly arranged on the upper and lower inner walls of the shell of the fire damper body 1, air inlets 8 are provided at the rear sides of the two groups of air cavity ducts 7, a mounting frame 9 is fixedly connected near the rear sides between the two groups of air cavity ducts 7, two groups of openings 10 are provided on the inner side of the mounting frame 9, shielding plates 11 are rotatably connected at the positions near the two groups of openings 10 on the mounting frame 9, and magnetic strips 12 are fixedly arranged at the front end of the mounting frame 9 near the lower sides of the two groups of openings 10.

[0029] The guide plate 2 is set in an arc shape, the L-shaped frame 4 is connected to the inside of the air cavity duct 7, the air outlet 5 corresponds to between the guide plate 2 and the mounting plate 3, the two groups of air cavity ducts 7 are set symmetrically up and down, the two groups of baffles 11 are respectively adapted to the two groups of openings 10, the baffles 11 are the maximum angle after rotation, and the baffles 11 are set of metal material.

[0030] In order to ensure the normal use of the pipeline connected to the fire damper body 1, when the two sets of baffles 11 block the opening 10, the three sets of rollers 24 and the top strip 22 extending from the opening 10 will be pushed, so that the top strip 22 slides to the rear side along the connecting shaft seat 21 through the movable opening 23, and pushes the three sets of connected mounting rods 16. The movement of the mounting rods 16 simultaneously drives the sealing plate 15 and the rotating rod 14 to rotate in the two sets of connecting shaft blocks 13. The rotation of the two sets of sealing plates 15 on the upper and lower sides will open the two covered air inlets 8. At the same time, the rotating sealing plate 15 pulls the double hook spring 18 through the No. 1 connecting ring 17 to elastically stretch. In the absence of external airflow, the sealing plate 15 is automatically pulled back to keep the air cavity duct 7 closed, and the air is discharged normally through the opening 10. The interior of the fire damper body 1 is connected to the interior of the air cavity duct 7. At this time, the gas inside the fire damper body 1 is discharged to the outside through the air cavity duct 7, so as to avoid the fire damper body 1 from being unusable when encountering a large airflow.

[0031] The rear ends of the two groups of air chamber ducts 7 are fixedly connected with two groups of connecting shaft blocks 13, the inner sides of the two groups of connecting shaft blocks 13 are movably provided with rotating rods 14, the outer sides of the rotating rods 14 are fixedly provided with sealing plates 15, and the rear ends of the sealing plates 15 are fixedly installed with three groups of mounting rods 16, and one end of the sealing plates 15 is fixedly provided with two groups of No. 1 connecting rings 17, the outer sides of the two groups of No. 1 connecting rings 17 are sleeved with double hook springs 18, and one side of the two groups of double hook springs 18 is sleeved with No. 2 connecting rings 19, and the bottoms of the two groups of openings 10 are fixedly installed with mounting strips 20, and the upper sides of the two groups of mounting strips 20 are respectively fixedly provided with three groups of connecting shaft seats 21, and the upper sides of the three groups of connecting shaft seats 21 are movably provided with top strips 22, and the inner sides of the three groups of top strips 22 are provided with movable openings 23, and the front sides of the three groups of movable openings 23 are respectively movably provided with rollers 24.

[0032] The connecting shaft block 13 is located at the rear end of the wind cavity duct 7 near the upper corner, the sealing plate 15 blocks the position of the air inlet 8, the three groups of mounting rods 16 are evenly arranged laterally, and the three groups of mounting rods 16 are rotatably connected to the three groups of top strips 22 respectively. The No. 1 connecting ring 17, the double hook spring 18, and the No. 2 connecting ring 19 are located between the wind cavity duct 7 and the fire damper body 1, the No. 2 connecting ring 19 is fixedly connected to the inner wall of the fire damper body 1, the connecting shaft seat 21 is adapted to the movable port 23, and the top strip 22 and the roller 24 pass through the interior of the opening 10.

[0033] When the fire damper body 1 is in normal use, the airflow discharged outward will blow, and the shielding plate 11 connected to the mounting frame 9 will be rotated to open the opening 10 blocked by the shielding plate 11, so that the fire damper body 1 can normally discharge gas to the outside. When a larger airflow is generated in the outside and is greater than the airflow discharged by the fire damper body 1, the two sets of shielding plates 11 are blown in the opposite direction, so that the two sets of shielding plates 11 cover the front ends of the two sets of openings 10, and the two sets of magnetic strips 12 magnetically attract them to prevent the external gas from entering the fire damper. The interior of the main body 1 and the places entered along the connected pipes cause safety hazards; the airflow entering the two groups of wind cavity pipes 7 is discharged to the upper and lower sides through the vents 6 and the air outlets 5 respectively, and after the external airflow blows to the fire damper main body 1 from the front, the airflow in contact with the upper and lower side guide plates 2 is guided according to the arc state of the guide plates 2 and blows to the upper and lower sides. At the same time, the small airflow discharged from the two groups of air outlets 5 will be sucked away by the strong airflow from the outside, and flow and be discharged with the strong airflow from the outside, so it can work effectively in strong airflow weather.

[0034] Working principle: When the fire damper body 1 is in normal use, the airflow discharged outward will blow, and the shielding plate 11 connected to the installation frame 9 will be rotated to open the opening 10 blocked by the shielding plate 11, so that the fire damper body 1 can normally discharge gas to the outside. When a larger airflow is generated in the outside and is greater than the airflow discharged by the fire damper body 1, the two sets of shielding plates 11 are blown in the opposite direction, so that the two sets of shielding plates 11 cover the front ends of the two sets of openings 10, and the two sets of magnetic strips 12 magnetically attract them to prevent the outside air from entering. The liquid is poured into the interior of the fire damper body 1 and enters the place along the connected pipe, causing a safety hazard; at this time, in order to ensure the normal use of the pipe connected to the fire damper body 1, when the two sets of shielding plates 11 block the opening 10, they will push the three sets of rollers 24 and the top strip 22 extending from the opening 10, so that the top strip 22 slides backward along the connecting shaft seat 21 through the movable opening 23, and pushes the three sets of connected installation rods 16, and the movement of the installation rods 16 simultaneously drives the sealing plate 15 and the rotating rod 14 to move between the two sets of connecting shafts. The block 13 rotates, and the rotation of the two sets of sealing plates 15 on the upper and lower sides will open the two covered air inlets 8. At the same time, the rotating sealing plate 15 pulls the double hook spring 18 through the No. 1 connecting ring 17 to elastically stretch. Without the influence of external airflow, the sealing plate 15 is automatically pulled back to maintain the closed state of the air cavity duct 7, and is discharged normally through the opening 10. The interior of the fire damper main body 1 is connected with the interior of the air cavity duct 7. At this time, the gas inside the fire damper main body 1 is guided to the outside through the air cavity duct 7 to avoid the fire damper main body 1 from being unusable when encountering a large airflow. Finally, the airflow entering the two sets of air cavity ducts 7 is discharged to the upper and lower sides respectively through the vent 6 and the air outlet 5. After the external airflow blows to the fire damper main body 1 from the front, the airflow in contact with the upper and lower guide plates 2 is guided according to the arc state of the guide plate 2 and blows to the upper and lower sides. At the same time, the small airflow discharged from the two sets of air outlets 5 will be sucked away by the strong airflow from the outside, and flow and discharge with the strong airflow from the outside, so as to effectively work in strong airflow weather.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire damper with a flow-stopping structure, comprising a fire damper body (1), characterized in that: Guide plates (2) are fixedly arranged at the front edge positions of the upper and lower ends of the shell of the fire damper body (1), and mounting plates (3) are fixedly arranged at the upper and lower ends of the shell of the fire damper body (1) near the guide plates (2). An L-shaped frame (4) is fixedly arranged between the guide plates (2) and the mounting plate (3), and a plurality of air outlets (5) are provided at the upper end of the L-shaped frame (4). Ventilation ports (6) are provided at the upper and lower ends of the shell of the fire damper body (1) at positions corresponding to the L-shaped frame (4). The upper and lower inner walls of the shell are respectively fixedly provided with air cavity ducts (7); the rear sides of the two groups of air cavity ducts (7) are respectively provided with air inlets (8); a mounting frame (9) is fixedly connected between the two groups of air cavity ducts (7) near the rear side; two groups of openings (10) are provided on the inner side of the mounting frame (9); shielding plates (11) are rotatably connected to the positions of the mounting frame (9) near the two groups of openings (10); and magnetic strips (12) are fixedly provided at the front end of the mounting frame (9) near the lower sides of the two groups of openings (10); The rear ends of the two groups of air chamber ducts (7) are fixedly connected to two groups of connecting shaft blocks (13); a rotating rod (14) is movably provided inside the two groups of connecting shaft blocks (13); a sealing plate (15) is fixedly provided outside the rotating rod (14); three groups of mounting rods (16) are fixedly installed at the rear end of the sealing plate (15); two groups of No. 1 connecting rings (17) are fixedly provided at one end of the sealing plate (15); and double hook springs (18) are sleeved on the outer sides of the two groups of No. 1 connecting rings (17). One side of the two groups of double hook springs (18) is sleeved with a No. 2 connecting ring (19), the bottom of the two groups of openings (10) is fixedly installed with a mounting strip (20), the upper sides of the two groups of mounting strips (20) are respectively fixedly provided with three groups of connecting shaft seats (21), the upper sides of the three groups of connecting shaft seats (21) are movably provided with a top strip (22), the inner sides of the three groups of top strips (22) are provided with a movable opening (23), and the front sides of the three groups of movable openings (23) are respectively movably provided with a roller (24); The connecting shaft block (13) is located at the rear end of the air chamber duct (7) close to the upper corner, and the sealing plate (15) blocks the air inlet (8); The three groups of mounting rods (16) are evenly arranged in the transverse direction, and the three groups of mounting rods (16) are rotatably connected to the three groups of top strips (22) respectively. The No. 1 connecting ring (17), the double hook spring (18), and the No. 2 connecting ring (19) are located between the air cavity duct (7) and the fire damper body (1); The second connecting ring (19) is fixedly connected to the inner wall of the fire damper body (1), the connecting shaft seat (21) is matched with the movable opening (23), and the top strip (22) and the roller (24) pass through the interior of the opening (10).

2. The fire damper with a flow-stopping structure according to claim 1, characterized in that: The guide plate (2) is arranged in an arc shape, the L-shaped frame (4) is communicated with the interior of the air cavity duct (7), and the air outlet (5) corresponds to between the guide plate (2) and the mounting plate (3).

3. The fire damper with a flow-stopping structure according to claim 1, characterized in that: The two groups of air cavity ducts (7) are arranged symmetrically up and down, and the two groups of shielding plates (11) are respectively matched with the two groups of openings (10).

4. The fire damper with a flow-stopping structure according to claim 1, characterized in that: The shielding plate (11) is at its maximum angle after rotation, and the shielding plate (11) is made of metal.

Images