Smoke exhaust fireproof valve

Abstract

The utility model relates to the technical field of smoke exhaust fireproof valves, and particularly discloses a smoke exhaust fireproof valve which is characterized in that mounting plates are arranged at the two ends of a frame respectively, and a containing space is formed in the frame; the executing mechanism is mounted on the outer side of the outer wall of the frame and is opposite to the accommodating space; two ends of the rotating shaft are rotatably connected with the frame, one end is connected with the executing mechanism, and the other end extends into the accommodating space; the valve plate is fixedly connected to the outer side of the outer wall of the rotating shaft and matched with the inner wall face of the frame in shape. The baffle is contracted in the wall face of the frame, so that the smoke exhaust channel is completely unblocked, the smoke exhaust effect is greatly improved, it is ensured that smoke and the like can be smoothly and efficiently exhausted through the smoke exhaust channel in the scene where smoke needs to be exhausted, it is ensured that the valve plate can be tightly closed when the fireproof and smoke-proof requirements are met, smoke and fire spreading is effectively blocked, the high efficiency of smoke exhaust is ensured, and the smoke exhaust effect is improved. And the fireproof and smoke-proof reliability is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of smoke exhaust fire dampers, and specifically to a smoke exhaust fire damper. Background Technology

[0002] In the current field of smoke exhaust fire dampers, smoke exhaust fire dampers are widely used in the ventilation and smoke exhaust systems of various buildings, playing a role in normal ventilation and smoke exhaust and fire prevention scenarios during fires. During normal ventilation, the valve plate is in the open position to ensure air circulation; in the event of a fire, the actuator moves, causing the valve plate to close, blocking the spread of smoke and fire.

[0003] However, traditional smoke exhaust fire dampers have significant drawbacks. Due to their fixed limiting structure, during long-term operation, dust and grease from cooking within the complex indoor air environment accumulate on the limiting plates. Over time, this buildup affects the proper closure of the valve plates, preventing them from tightly fitting against the inner wall of the frame. This prevents the smoke exhaust channel from being completely sealed. Furthermore, the protruding limiting structure occupies space within the smoke exhaust channel, obstructing the smoke extraction process and reducing its effectiveness. This significantly reduces the smoke's ability to escape smoothly and efficiently, greatly diminishing the damper's ability to prevent fires and thus failing to effectively protect lives and property. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art, and thus propose a smoke exhaust fire damper. The device disclosed in this invention optimizes the closing mechanism. When the valve plate is in the open state, the baffle in the closing mechanism retracts into the frame wall, leaving the smoke exhaust channel between the frames completely unobstructed. This greatly improves the smoke exhaust effect, ensuring that smoke and other contaminants can be smoothly and efficiently discharged through the smoke exhaust channel in scenarios requiring smoke exhaust.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A smoke exhaust fire damper includes a frame, a rotating shaft, and a valve plate. The two ends of the rotating shaft are rotatably connected to the frame. The valve plate is fixedly connected to the outer side of the rotating shaft and is adapted to the shape of the inner wall of the frame. The damper also includes an actuator, a linkage mechanism, and a closing mechanism. Mounting plates are respectively provided at both ends of the frame, forming an accommodating space inside. The actuator is installed on the outer side of the frame and is positioned opposite to the accommodating space. One end of the rotating shaft is connected to the actuator, and the other end extends into the accommodating space. The linkage mechanism is installed inside the accommodating space and connected to the bottom of the rotating shaft. The closing mechanism is staggered on both sides inside the frame and connected to the linkage mechanism.

[0007] Preferably, the linkage mechanism includes gears, racks, and a delay component. The two gears are fixedly mounted on the outer wall of the bottom end of the shaft, and the two racks are respectively movable relative to each other in the accommodating space and mesh with the two gears. The delay component is fixedly mounted at the ends of the two racks.

[0008] Preferably, the inner wall of the frame has two receiving grooves parallel to the axis of rotation, and the two receiving grooves are staggered.

[0009] Preferably, the staggered gap between the two receiving grooves is equal to the thickness of the valve plate.

[0010] Preferably, the delay assembly includes inserts and sleeves, with two inserts fixedly installed at both ends of the rack, and two sleeves respectively inserted into and engaged with the two inserts.

[0011] Preferably, the closing mechanism includes a limiting guide rod, a baffle, and a protrusion. The ends of several limiting guide rods are fixedly disposed in two receiving grooves. The two baffles are respectively disposed inside the receiving grooves in a horizontal direction and slide in cooperation with the limiting guide rods. The two protrusions are respectively fixedly disposed at the bottom of the two baffles and are fixedly connected to the two sleeves.

[0012] Preferably, the baffle is provided with grooves, the number and position of which are consistent with the limiting guide rod.

[0013] Preferably, the movement direction of the two racks is perpendicular to the axis of rotation.

[0014] Preferably, a fuse is provided inside the actuator.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The device disclosed in this utility model optimizes the closing mechanism. When the valve plate is in the open state, the baffle in the closing mechanism retracts into the frame wall. At this time, the smoke exhaust channel between the frames is completely unobstructed, which greatly improves the smoke exhaust effect and ensures that smoke and other substances can be smoothly and efficiently discharged through the smoke exhaust channel in the scenario where smoke exhaust is required.

[0017] 2. This utility model discloses a device that, through the setting of an actuator and a linkage mechanism, allows the actuator to rotate when a fire occurs. The fuse in the actuator melts due to heat, causing the actuator to drive the rotating shaft, which in turn rotates the valve plate. During the valve plate's rotation, the linkage mechanism operates, with a gear at the bottom of the rotating shaft driving a meshing rack. The insert rod at the end of the rack pushes a connected closing mechanism, causing the baffle, originally retracted within the frame wall, to move. When the valve plate reaches its position, the baffle also completes its movement, limiting the valve plate. Under normal smoke exhaust conditions, the baffle retracts into the frame wall, fundamentally solving the problem of incomplete closure caused by the accumulation of impurities on the fixed limiting baffle of traditional smoke exhaust fire dampers. This ensures that the valve plate can close tightly during fire and smoke control, effectively blocking the spread of smoke and fire, thus guaranteeing both efficient smoke exhaust and improved reliability of fire and smoke control. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the linkage mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the baffle structure of this utility model;

[0021] Figure 4 This is a top sectional view of the present invention.

[0022] The components are: 1. Frame; 2. Actuator; 3. Rotating shaft; 4. Valve plate; 5. Gear; 6. Rack; 7. Insert rod; 8. Sleeve; 9. Limiting guide rod; 10. Baffle; 11. Protrusion; 12. Mounting plate; 13. Accommodation space; 14. Receiving groove. Detailed Implementation

[0023] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] like Figures 1-4As shown, this utility model provides a technical solution: a smoke exhaust fire damper, comprising: a frame 1, an actuator 2, a rotating shaft 3, a valve plate 4, a linkage mechanism, and a closing mechanism. The frame 1 has mounting plates 12 at both ends, forming an internal accommodating space 13. The actuator 2 is installed on the outer side of the outer wall of the frame 1 and is positioned opposite to the accommodating space 13. The rotating shaft 3 is rotatably connected to the frame 1 at both ends, with one end connected to the actuator 2 and the other end extending into the accommodating space 13. The valve plate 4 is fixedly connected to the outer side of the rotating shaft 3 and is adapted to the shape of the inner wall of the frame 1. The linkage mechanism is installed inside the accommodating space 13 and connected to the bottom of the rotating shaft 3. The closing mechanism is staggered on both sides inside the frame 1 and connected to the linkage mechanism. A fuse is installed inside the actuator 2.

[0025] It should be noted that when the valve plate 4 is in the open state, the closing mechanism retracts inside the wall of the frame 1 to prevent dust or oil stains from adhering. At this time, the smoke exhaust channel between the frames 1 is completely unobstructed, which greatly improves the smoke exhaust effect and ensures that smoke and other substances can be smoothly and efficiently discharged through the smoke exhaust channel in the scenario where smoke exhaust is required. When the fuse in the actuator 2 melts due to heat, the actuator 2 starts to work. Since the actuator 2 is widely used in the valve field and is a well-known technology in the field, it has not been described in detail here. Since one end of the actuator 2 is connected to the rotating shaft 3, it drives the rotating shaft 3 to start rotating, which in turn causes the valve plate 4, which is fixedly connected to the outer side of the outer wall of the rotating shaft 3, to rotate. When valve plate 4 rotates 90 degrees from the open state, the linkage mechanism connected to the bottom of the rotating shaft 3 is driven during the rotation of valve plate 4. The linkage mechanism begins to push the interlocking closing mechanism to move relative to each other, and finally achieves the limit of valve plate 4 when it is rotated to the position, so that valve plate 4 fits tightly against the inner wall of frame 1, and finally achieves the complete closure of frame 1. This fundamentally solves the problem of valve plate 4 not closing tightly due to the accumulation of dust or oil stains on the limit baffle of traditional smoke exhaust fire damper. Moreover, the closing force is strong, ensuring the sealing of the smoke exhaust channel.

[0026] In some examples, the linkage mechanism includes: gears 5, racks 6, and delay components. Two gears 5 are fixedly mounted on the outer wall of the bottom end of the rotating shaft 3; two racks 6 are respectively movably disposed in the accommodating space 13 and mesh with the two gears 5; the delay components are fixedly disposed at the ends of the two racks 6.

[0027] It should be noted that when the smoke exhaust fire damper operates and the rotating shaft 3 begins to rotate, the two gears 5 fixedly mounted on the outer wall of the bottom end of the rotating shaft 3 rotate synchronously. Since the two racks 6 are respectively movably disposed within the accommodating space 13 and mesh with the two gears 5, the rotating gears 5 drive the meshing racks 6 to move relative to each other within the accommodating space 13. Delay components are fixedly disposed at the ends of the two racks 6. During the movement of the racks 6, the delay components, based on their own characteristics, delay the movement of the protrusion 11, ensuring that the movement of the protrusion 11 is not instantaneous but rather controlled to a certain extent, thus guaranteeing the feasibility of the delayed movement of the closing mechanism.

[0028] In some instances, the inner wall of the frame 1 has two receiving grooves 14 parallel to the pivot 3, which are staggered and the gap between them is equal to the thickness of the valve plate 4. The receiving grooves 14 provide movable space for the baffle that needs to move.

[0029] In some instances, the delay assembly includes: insert rods 7 and sleeves 8, with one end of each insert rod 7 fixedly mounted on one end of each rack 6; and two sleeves 8 respectively inserted into each insert rod 7.

[0030] It should be noted that when the valve plate 4 needs to be switched to the open or closed state, the rack 6 begins to move under the drive of the gear 5, and the plug rod 7 fixedly connected to it also moves synchronously. The plug rod 7 inserts or pulls out along the sleeve 8 with which it is inserted. When the plug rod 7 is inserted or pulled out to the pre-designed length, the plug rod 7 will contact or disengage from the closing mechanism and apply force, thereby pushing the closing mechanism to start operating, causing the closing mechanism to perform corresponding actions according to the working requirements of the smoke exhaust fire damper, ensuring that the valve plate 4 is in the fully closed or open state.

[0031] In some examples, the closing mechanism includes: limiting guide rods 9, baffles 10, and protrusions 11. The ends of several limiting guide rods 9 are fixedly disposed within two receiving grooves 14. Two baffles 10 are respectively movably disposed within the receiving grooves 14 in the horizontal direction and slide in cooperation with the two limiting guide rods 9. Two protrusions 11 are respectively fixedly disposed at the bottom of the two baffles 10 and are fixedly connected to the two sleeves 8. The baffles 10 are provided with grooves, the number and position of which are consistent with those of the limiting guide rods 9.

[0032] It should be noted that when the smoke exhaust fire damper is working, as the insertion rod 7 moves with the rack 6 and inserts or pulls out of the sleeve 8 to a certain length, it will push the closing mechanism to operate. Multiple limit guide rods 9 provide a guiding basis for the movement of the baffle 10, making the movement of the baffle 10 stable. When the valve plate 4 needs to be closed, the end of the insert rod 7 disengages from the protrusion 11. Only after the insert rod 7 moves a preset length from the sleeve 8 can the sleeve 8 and the protrusion 11 move simultaneously. The protrusion 11 then drives the baffle 10 to slide horizontally along the limiting guide rod 9 in the receiving groove 14. When the valve plate 4 changes from the closed state to the open state, the control of the actuator 2 causes the rotating shaft 3 to rotate in the opposite direction. Driven by the gear 5, the rack 6 begins to move in the opposite direction, and the two insert rods 7 move in opposite directions. The outer end of the insert rod 7 gradually comes into contact with the protrusion 11. Under the continuous rotation of the gear 5, the baffle 10 is pushed into the inside of the receiving groove 14 to prevent the accumulation of impurities and oil stains, thus avoiding the failure of the smoke exhaust fire damper in the emergency sealing state.

[0033] In some instances, the movement direction of the two racks 6 is perpendicular to the axis of the rotating shaft 3. Accurate control of the movements of other components of the closing mechanism associated with the racks 6 ensures the feasibility of moving the baffle 10.

[0034] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this utility model and do not require that this utility model be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "connected" and "linked" in this utility model should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0035] The above description represents the preferred operating mode of this utility model. The specific operating mode description is only for better understanding the concept of this utility model. For those skilled in the art, several improvements or equivalent substitutions can be made based on the principles of this utility model, and these improvements or equivalent substitutions are also considered to fall within the protection scope of this utility model.

Claims

1. A smoke exhaust fire damper comprising a frame (1), a rotating shaft (3) and a valve plate (4), the rotating shaft (3) is rotatably connected with the frame (1) at both ends, the valve plate (4) is fixedly connected to the outer wall of the rotating shaft (3) and is matched with the inner wall surface shape of the frame (1), characterized in that: It also includes an executive mechanism (2), linkage mechanism and closing mechanism, the frame (1) both ends are respectively provided with mounting plate (12), and the inside forms accommodating space (13); the executive mechanism (2) is installed on the outer wall of frame (1) outside, and is opposite to the accommodating space (13) setting;The rotating shaft (3) one end is connected with the executive mechanism (2), and the other end extends into the accommodating space (13);The linkage mechanism is installed in the inside of accommodating space (13), and is connected with the bottom of rotating shaft (3);The closing mechanism is staggered and arranged on both sides of the inside of frame (1), and is connected to the linkage mechanism. ​ 2. A smoke control fire damper according to claim 1, wherein: The fuse is arranged in the executive mechanism (2).

3. A smoke control fire damper according to claim 1, wherein: The linkage mechanism includes gear (5), rack (6) and delay component, two gear (5) fixed sleeve is arranged on the bottom end of the outer wall of rotating shaft (3), two rack (6) can be respectively arranged in the accommodating space (13) and is engaged with two gear (5);The delay component is fixedly arranged at the end of two rack (6).

4. A smoke control fire damper according to claim 3, wherein: The accommodating groove (14) parallel to the rotating shaft (3) is opened in the inner wall of the frame (1), and the two accommodating grooves (14) are staggered.

5. A smoke control fire damper according to claim 4, wherein: The staggered gap of the two accommodating grooves (14) is equal to the thickness of the valve plate (4).

6. A smoke control fire damper according to claim 4, wherein: The delay component includes plug rod (7) and sleeve (8), two plug rods (7) are fixedly installed at the two ends of rack (6), and two sleeves (8) are respectively inserted with two plug rods (7).

7. A smoke control fire damper according to claim 6, wherein: The closing mechanism includes limiting guide rod (9), baffle (10) and convex block (11), the end of several limiting guide rods (9) is fixedly arranged in two accommodating grooves (14), two baffles (10) are respectively movably arranged in the inside of accommodating groove (14), and are slidably connected with limiting guide rod (9), two convex blocks (11) are respectively fixedly arranged at the bottom of two baffles (10), and are fixedly connected with two sleeves (8).

8. A smoke control fire damper according to claim 7, wherein: The recess is arranged on the baffle (10), and the number and position of the recess are consistent with the limiting guide rod (9).

9. A smoke control fire damper according to claim 3, wherein: The movement direction of the two rack (6) is perpendicular to the axial direction of the rotating shaft (3).

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