Dustproof smoke exhaust fire valve

Abstract

The application relates to the technical field of fireproof valves, and particularly discloses a dustproof smoke exhaust fireproof valve which comprises a valve body, a raft plate rotatably connected to the valve body, a rotating assembly connected to the valve body and the raft plate and used for driving the raft plate to rotate, a movable end of the rotating assembly being provided with self-locking capability, a plug-in assembly used for detachably connecting the movable end of the rotating assembly and the raft plate, a first elastic member connected between the raft plate and the valve body, and a sliding member slidably connected to the valve body, the sliding member being used for being connected with the plug-in assembly so that the sliding member drives the plug-in assembly to move when the sliding member slides, and the movable end of the rotating assembly and the raft plate are switched between the connection state and the separation state. The dustproof smoke exhaust fireproof valve replaces the traditional one-time fusing link with the repeatedly movable sliding member, does not need to be frequently replaced, is more convenient, and is helpful to reducing the maintenance cost and workload.

Description

Technical Field

[0001] This application relates to the field of fire damper technology, and in particular to a dustproof and smoke-exhausting fire damper. Background Technology

[0002] Fire dampers are an indispensable safety component in modern building fire protection systems. Their core function is to automatically sense the high temperature inside the flue and quickly close it when a fire occurs, so as to effectively prevent the spread of fire and toxic smoke along the ventilation duct.

[0003] Currently, most fire dampers on the market adopt a classic temperature-sensitive triggering mechanism, which uses a fusible metal strip as the core temperature sensing and actuating element. This fusible metal strip is usually made of a low-melting-point solder alloy, which withstands a certain tensile force at room temperature, acting as a locking mechanism for the valve opening. When a fire occurs, the flue temperature rises sharply and reaches the preset melting point of the fusible metal strip, such as 70°C, causing the strip to melt and break. This breaking action releases the original locking force, allowing the energy-stored spring or other mechanism to drive the valve to close rapidly.

[0004] However, the triggering process of the fusible metal strip is irreversible. Once the fusible metal strip melts and breaks, it becomes permanently ineffective and must be replaced by professionals to restore the fire damper to standby status, which increases maintenance costs and workload. Utility Model Content

[0005] In order to ensure reliable triggering and repeatability of action, this application provides a dustproof, smoke-exhausting, and fireproof valve.

[0006] The dustproof, smoke-exhausting, and fireproof damper provided in this application adopts the following technical solution: A dustproof and smoke-exhausting fire damper, comprising a valve body; A raft plate is rotatably connected to the valve body and is used to control the opening and closing of the valve body; A rotating assembly is connected to the valve body and the raft plate respectively, and is used to drive the raft plate to rotate. The movable end of the rotating assembly has a self-locking capability. A plug-in assembly is used to detachably connect the movable end of the rotating assembly and the raft plate, so that the movable end of the rotating assembly and the raft plate can rotate synchronously or generate relative rotation; A first elastic element is connected between the raft plate and the valve body so that when the raft plate is in the open state, the first elastic element applies an elastic force to the raft plate to reset it to the closed state. A sliding member is slidably connected to the valve body. The sliding member is used to connect with the plug-in assembly so that when the sliding member slides, it drives the plug-in assembly to move, and causes the movable end of the rotating assembly and the raft plate to switch between connected and disconnected states.

[0007] By adopting the above technical solution, the closing power of the raft plate is provided by the elastic potential energy pre-stored in the first elastic element. The locking of the valve in the open state depends on the cooperation between the self-locking rotating component and the plug-in component. Under normal conditions, the raft plate is in the open state to ensure smooth smoke exhaust. When the temperature is high, the sliding component drives the plug-in component to release the lock, thereby realizing the rapid closing of the raft plate. Therefore, this application replaces the traditional disposable fuse with a repeatable sliding component, eliminating the need for frequent replacement, making it more convenient, and helping to reduce maintenance costs and workload.

[0008] Optionally, the raft plate includes a baffle and a rotating rod, the rotating rod being connected to the middle of the baffle and rotatably connected to the valve body, and the first elastic element being connected between the rotating rod and the valve body.

[0009] By adopting the above technical solution, the first elastic element that provides the closing power acts directly on the rotating rod, which minimizes the torque transmission path and reduces energy loss, ensuring that the raft can be driven to close quickly and reliably after unlocking. The structural design is compact and reasonable.

[0010] Optionally, the rotating assembly includes a worm gear and a worm, the worm gear being rotatably sleeved on the outside of the rotating rod, the worm being rotatably connected to the valve body, and the worm meshing with the worm gear.

[0011] By adopting the above technical solution and using a worm gear mechanism, the self-locking capability of the rotating component is achieved by utilizing the natural self-locking characteristics of the worm gear and worm. During manual reset, the worm gear can be easily rotated to drive the worm wheel to open the raft plate and resist the torque applied by the first elastic element. After the rotation stops, the worm gear mechanism can lock itself, and the raft plate can be stably kept in the open position without the need for an additional locking device. The structure is simple, stable and reliable.

[0012] Optionally, a first connecting plate is connected to the side of the raft plate near the worm gear, and the first connecting plate has a receiving groove; the plug-in assembly includes a sliding block, a second elastic element, a second connecting plate, and a locking frame. Multiple sliding blocks are arranged in a ring, and the sliding blocks are slidably connected to the receiving groove. The second elastic element is connected between the sliding block and the bottom wall of the receiving groove, and the second elastic element drives the sliding block to slide outwards from the receiving groove. The second connecting plate is connected to the worm gear, the first end of the locking frame is slidably connected to the second connecting plate, and the second end of the locking frame is used to insert into the receiving groove.

[0013] By adopting the above technical solution, in the locked state, one end of the locking frame is located in the second connecting plate, and the other end of the locking frame is inserted into the receiving groove. A portion of the sliding blocks are pushed downward by the locking frame, while the other portion of the sliding blocks remain in their original position. The sliding blocks that remain in their original position press against the locking frame, restricting the relative rotation between the sliding blocks and the locking frame. This creates a stable torque transmission path between the first and second connecting plates, allowing them to rotate synchronously and facilitating the smooth manual adjustment of the raft plate position by rotating the worm gear. When the locking frame is driven to slide out of the receiving groove, the connection between the first and second connecting plates can be disconnected, making the first and second connecting plates independent of each other. This eliminates the self-locking restriction of the worm gear on the raft plate, allowing the raft plate to quickly rotate to a state that closes the valve body under the action of the first elastic element.

[0014] In addition, the multiple ring-shaped sliding blocks ensure that the torque is evenly distributed, the load-bearing capacity is strong, and the connection is reliable. Furthermore, no matter which position the second connecting plate rotates to, the locking frame can be smoothly inserted into the receiving groove and the sliding blocks can abut against the locking frame, thereby locking the locking frame.

[0015] Optionally, the sliding block is provided with balls for abutting against the inner wall of the receiving groove.

[0016] By adopting the above technical solution, the sliding friction between the sliding block and the inner wall of the receiving groove during the extension and retraction of the sliding block is transformed into rolling friction, which reduces the motion resistance, ensures the smooth movement of the sliding block, and improves the sensitivity and reliability of the unlocking action of the plug-in component.

[0017] Optionally, the sliding member includes a connecting rod and a shape memory alloy component. The connecting rod is slidably connected to the valve body, and one end of the connecting rod is used to connect to the locking frame. The shape memory alloy component is connected between the end of the connecting rod away from the locking frame and the valve body. The shape memory alloy component is used to shrink after absorbing heat and drive the locking frame to slide out of the receiving groove through the connecting rod.

[0018] By adopting the above technical solution, unlike the passive mechanism of traditional fuses that fail due to melting, the shape memory alloy component can actively contract when it reaches the predetermined phase change temperature, generating a tensile force. This tensile force is transmitted to the locking frame through the connecting rod, thereby automatically unlocking at high temperature and allowing the raft plate to rotate to the closed state. The recoverable characteristics of the shape memory alloy enable the reusability of the triggering device, thereby reducing maintenance costs. Moreover, it can be automatically triggered after reaching the predetermined temperature without the need for other control, which helps to simplify the structure and reduce costs.

[0019] Optionally, a connecting assembly is provided between the end of the connecting rod and the locking frame. The connecting assembly includes a connecting post and a connecting ring. The connecting post is connected to the locking frame, and the end of the connecting post protrudes from the second connecting plate. The connecting ring is connected to the connecting rod. There are two connecting rings. One end of the connecting post that protrudes from the second connecting plate is located between the two connecting rings.

[0020] By adopting the above technical solution, the axial tension of the connecting rod can be reliably transmitted while the rotation of the locking frame will not cause the connecting rod to rotate, thus avoiding interference and helping to ensure the smooth vertical sliding process of the connecting rod.

[0021] Optionally, the connecting rod includes a connecting cylinder slidably connected to the valve body and a movable rod slidably inserted into the connecting cylinder, with a third elastic element connecting the connecting cylinder and the movable rod; the movable rod is provided with a first abutting ring, and the inner wall of the connecting cylinder is provided with a second abutting ring for abutting against the first abutting ring.

[0022] By adopting the above technical solution, when the movable rod is pulled outward and then released, the third elastic element will drive the movable rod to rebound quickly, causing the first abutment ring and the second abutment ring to collide, thereby generating mechanical vibration on the entire connecting rod. This vibration will be directly transmitted to the shape memory alloy component on the outside of the connecting cylinder, thereby effectively shaking off the dust attached to its surface. This achieves fast and convenient non-contact cleaning of the temperature sensing element, which helps to ensure the long-term reliable response of the valve and improve its sensitivity.

[0023] Optionally, the valve body is provided with a limiting plate for abutting against the raft plate. When the raft plate closes the valve body, the raft plate abuts against the limiting plate.

[0024] By adopting the above technical solution, the limiting plate provides a clear termination position for the closing action of the raft plate, so that the raft plate can accurately stop in the fully enclosed position after closing, ensuring the sealing effect.

[0025] Optionally, the valve body is provided with a fireproof sealing strip for abutting against the raft plate.

[0026] By adopting the above technical solution, when the raft plate is closed, once it comes into contact with high-temperature flue gas, the sealing strip will expand to fill the tiny gaps that may exist between the raft plate and the valve body, forming a second sealing line of defense, effectively preventing the crossflow of flue gas and flames, and improving the fireproof isolation performance of the valve.

[0027] In summary, this application includes the following beneficial technical effects: 1. By using shape memory alloy components as a reusable temperature-sensing trigger core, and in conjunction with a worm gear reset mechanism with a self-locking function, the problem of frequent replacement of traditional fusible fire dampers is solved, which helps to reduce maintenance costs and workload.

[0028] 2. The internal and external split connecting rod structure with built-in springs allows maintenance personnel to perform vibration dust removal on the shape memory alloy parts through a simple pull-out operation without disassembly, reducing the safety hazard of slow response of the temperature sensing element due to dust accumulation under harsh working conditions. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure from a first-view perspective of Embodiment 1 of this application; Figure 2 This is a schematic diagram of the overall structure from a second perspective of Embodiment 1 of this application; Figure 3 This is a cross-sectional view of Embodiment 1 of this application; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is an exploded view of the plug-in assembly in Embodiment 1 of this application; Figure 6 This is a schematic diagram of the structure of Embodiment 1 of this application with the mounting base hidden; Figure 7 yes Figure 6 Enlarged view of point B in the middle; Figure 8 This is a cross-sectional view of Embodiment 2 of this application; Figure 9 yes Figure 8 Enlarged view of point C in the middle; Figure 10 yes Figure 9 Enlarged diagram of point D in the middle.

[0030] Reference numerals: 1. Valve body; 11. Limiting plate; 2. Raft plate; 21. Baffle; 22. Rotating rod; 3. Rotating assembly; 31. Worm gear; 311. Rotating shaft; 32. Worm; 321. Grip block; 4. Insertion assembly; 41. Sliding block; 411. First limiting block; 42. Second elastic element; 43. Second connecting plate; 431. Slide groove; 432. Clearance groove; 44. Locking frame; 441. Support rod; 442. Locking block; 5. First elastic element; 6. Sliding element; 61. Connecting rod; 611. Connecting cylinder; 6111. Second abutment ring; 612. Movable rod; 6121. First abutment ring; 613. Third elastic element; 62. Shape memory alloy part; 7. Connecting assembly; 71. Connecting column; 72. Connecting ring; 8. First connecting plate; 81. Receiving groove; 811. First limiting groove; 9. Mounting seat. Detailed Implementation

[0031] The following combination Figures 1-10 This application will be described in further detail.

[0032] Example 1 This application discloses a dustproof, smoke-exhausting, and fireproof valve. (Refer to...) Figure 1 and Figure 2 The dustproof and smoke-exhausting fire damper includes a rectangular frame-shaped valve body 1 and a raft plate 2 rotatably connected inside the valve body 1. The rotation of the raft plate 2 controls the opening or closing of the valve body 1. The raft plate 2 includes a baffle 21 and a rotating rod 22. In this embodiment, the axis of the rotating rod 22 is vertically arranged as an example. The rotating rod 22 is fixedly connected to the center of the baffle 21 and is fixedly inserted into the baffle 21. The bottom end of the rotating rod 22 protrudes from the bottom wall of the baffle 21 and is rotatably connected to the bottom end of the valve body 1. The baffle 21 is symmetrical about the axis of the rotating rod 22. When the baffle 21 is perpendicular to the extension direction of the channel inside the frame-shaped valve body 1, the fire damper is in the closed state; when the baffle 21 is parallel to the extension direction of the channel inside the frame-shaped valve body 1, the fire damper is in the closed state. The fire damper is in the fully open position. Figure 1 The image shows the open state of the fire damper.

[0033] Reference Figure 2 In this embodiment, a first elastic element 5 is connected between the bottom end of the rotating rod 22 and the valve body 1. The first elastic element 5 is a torsion spring. When the raft plate 2 is in the open state, the first elastic element 5 applies an elastic force to the raft plate 2, causing it to rotate in the closed direction. In other embodiments, the first elastic element 5 may also be a spiral spring.

[0034] To improve the overall performance of the fire damper, a limiting plate 11 and a fireproof sealing strip (not shown in the figure) are also provided on the valve body 1. Two limiting plates 11 are provided, located on opposite sides of the valve body 1. The limiting plates 11 provide a precise stopping position when the raft plate 2 is driven to close at high speed by the first elastic element 5, preventing excessive rotation of the raft plate 2 from affecting the sealing effect. The fireproof sealing strip is fixedly installed on the inner wall of the valve body 1 at a position where it fits against the side wall of the raft plate 2. When the valve is closed and the fire temperature rises, the fireproof sealing strip will expand due to heat, further filling the gaps and forming a more robust flame and smoke barrier.

[0035] Reference Figure 3 and Figure 4To facilitate the rotation of the raft plate 2 and reliably maintain it in the open position, the fire damper also includes a locking and reset system consisting of a rotating assembly 3 and a plug-in assembly 4. The rotating assembly 3 includes a worm gear 31 and a worm 32; a mounting base 9 is fixedly connected to the top of the valve body 1, and the mounting base 9 has an internal cavity. Both the worm gear 31 and the worm 32 are located inside the mounting base 9. The worm gear 31 is connected to the raft plate 2 via the plug-in assembly 4. A rotating shaft 311 is coaxially fixedly connected to the worm gear 31, and the rotating shaft 311 is coaxially positioned above the rotating rod 22; the rotating shaft 311 is rotatably connected to the mounting base 9, causing the worm gear 31 to rotate; the axis of the worm 32 is horizontal, and the worm 32 is rotatably connected to the mounting base 9 around its own axis, meshing with the worm gear 31. One end of the worm 32 is coaxially fixedly connected to a gripping block 321, which facilitates the rotation of the worm 32 via the gripping block 321. The worm 32 drives the worm wheel 31 to rotate, causing the raft plate 2 to rotate, thereby adjusting the position of the raft plate 2. Because the cooperation between the worm wheel 31 and the worm 32 has a self-locking characteristic, when not driven by external force, the worm 32 can lock the worm wheel 31, preventing the worm wheel 31 from rotating, thus stably maintaining the raft plate 2 in its current state.

[0036] The plug-in assembly 4 is used to connect or disconnect the worm gear 31 from the raft plate 2. When the valve is open, the plug-in assembly 4 connects the raft plate 2 to the worm gear 31, thus locking the raft plate 2 and preventing it from closing automatically under the action of the first elastic element 5, maintaining its open state and ensuring smooth smoke extraction. When the temperature becomes too high during operation and reaches the preset temperature, the plug-in assembly 4 disconnects the connection between the worm gear 31 and the raft plate 2, releasing the lock on the raft plate 2. At this time, the first elastic element 5 drives the raft plate 2 to rotate, thereby quickly closing the valve. If the raft plate 2 needs to be manually reset later, the plug-in assembly 4 reconnects the worm gear 31 and the raft plate 2. Then, rotating the worm 32 drives the worm gear 31 to rotate, which in turn rotates the raft plate 2 to the open position. This operation is labor-saving and the process is controllable.

[0037] Reference Figure 4 and Figure 5A first connecting plate 8 is fixedly connected to the top of the raft plate 2, and the first connecting plate 8 is coaxially disposed at the top of the rotating rod 22. A receiving groove 81 is formed on the top wall of the first connecting plate 8. The receiving groove 81 is cylindrical and coaxially disposed with the rotating rod 22. The plug-in assembly 4 includes a sliding block 41 and a second elastic element 42. The sliding block 41 is located in the receiving groove 81, and the height of the sliding block 41 is less than the depth of the receiving groove 81. A first limiting block 411 is fixedly connected to the outer wall of the sliding block 41. A vertically arranged first limiting groove 811 is formed on the inner wall of the receiving groove 81. The first limiting block 411 is vertically slidably connected to the first limiting groove 811, so that the sliding block 41 can only slide vertically in the receiving groove 81 and cannot slide out of the receiving groove 81. Furthermore, the cooperation between the first limiting block 411 and the first limiting groove 811 can restrict the rotation of the sliding block 41 relative to the receiving groove 81, so that the sliding block 41 can only slide vertically relative to the receiving groove 81 and cannot rotate relative to it.

[0038] The sliding block 41 is a sector-shaped block, and multiple sliding blocks 41 are arranged in a circumferential array. The sidewalls of two adjacent sliding blocks 41 abut against each other, thereby filling the top of the receiving groove 81 through multiple sliding blocks 41. The second elastic element 42 is a spring, and the number of second elastic elements 42 is the same as the number of sliding blocks 41. Each second elastic element 42 corresponds to one sliding block 41, and the second elastic element 42 is fixedly connected between the bottom wall of the sliding block 41 and the bottom wall of the receiving groove 81. When the second elastic element 42 is in a compressed state, the second elastic element 42 presses the sliding block 41 against the top of the receiving groove 81.

[0039] The plug-in assembly 4 also includes a second connecting plate 43 and a locking frame 44. The second connecting plate 43 is a disc and is coaxially fixedly connected to the rotating shaft 311. The second connecting plate 43 is located below the worm gear 31, so the second connecting plate 43 and the worm gear 31 can rotate together. A vertically arranged sliding groove 431 is provided on the bottom wall of the second connecting plate 43. The locking frame 44 is vertically slidably connected to the sliding groove 431. The groove depth of the sliding groove 431 is not less than the height of the locking frame 44, so that the sliding groove 431 can completely accommodate the locking frame 44. The locking frame 44 includes a support rod 441 and locking blocks 442 fixedly connected to both ends of the support rod 441. A second limiting block is fixedly connected to the end of the locking block 442. A vertically arranged second limiting groove is provided on the inner wall of the sliding groove 431. The second limiting block is vertically slidably connected to the second limiting groove, so that the support rod 441 cannot be disengaged from the sliding groove 431. Locking block 442 is a sector-shaped block, and the cross-sectional shape of locking block 442 is the same as the cross-sectional shape of sliding block 41.

[0040] Therefore, when the locking frame 44 slides downward, the locking block 442 can slide downward. When the bottom end of the locking block 442 slides from the slide groove 431 into the receiving groove 81, the locking block 442 pushes the corresponding sliding block 41 downward. The sliding block 41 that is not pushed downward is in the initial state. Therefore, the sliding block 41 that is not pushed downward can abut against the side wall of the locking block 442. At this time, the locking block 442 and the sliding block 41 cannot rotate relative to each other, thus completing the connection between the second connecting plate 43 and the first connecting plate 8, so that the second connecting plate 43 and the first connecting plate 8 cannot rotate relative to each other. When the second connecting plate 43 rotates, it can drive the first connecting plate 8 to rotate, and the first connecting plate 8 drives the raft plate 2 to rotate. Moreover, the self-locking of the second connecting plate 43 can be transmitted to the raft plate 2 through the first connecting plate 8, thereby maintaining the raft plate 2 in the current state.

[0041] The outer wall of the sliding block 41 has a groove, in which a rolling ball (not shown in the figure) is placed. The side of the ball away from the groove abuts against the inner wall of the receiving groove 81, thereby reducing the sliding resistance and making the vertical sliding process of the sliding block 41 smoother and more sensitive.

[0042] Reference Figure 2 and Figure 5 The sliding component 6 is responsible for driving the locking frame 44. The sliding component 6 includes a connecting rod 61 and a shape memory alloy component 62. The connecting rod 61 is vertically mounted and slidably connected to the valve body 1. The shape memory alloy component 62 is a shape memory alloy spring. At room temperature, the shape memory alloy spring can stretch and maintain its deformed state. When the shape memory alloy spring is heated to a certain temperature, it can automatically contract and return to its pre-deformation state. The bottom end of the shape memory alloy component 62 is fixedly connected to the bottom end of the connecting rod 61, and the top end of the shape memory alloy component 62 is fixedly connected to the valve body 1. The top end of the connecting rod 61 and the locking frame 44 are connected via a connecting assembly 7.

[0043] At room temperature, the shape memory alloy part 62 is in a stretched installation state, and the top end of the connecting rod 61 protrudes from the top wall of the mounting base 9. Due to the special temperature-sensitive phase change characteristics of the shape memory alloy spring, when heated to the preset trigger temperature (e.g., 280°C), it will undergo a phase change and contract, thereby generating a strong tensile force. This tensile force drives the locking frame 44 to slide upward through the connecting rod 61 and the connecting assembly 7, causing the bottom end of the locking frame 44 to disengage from the receiving groove 81, the second connecting plate 43 and the raft plate 2 to separate. Under the action of the first elastic element 5, the raft plate 2 rotates 90° to the state of closing the valve, thereby providing fire protection.

[0044] Reference Figure 5 , Figure 6 and Figure 7The connecting assembly 7 includes a connecting post 71 and a connecting ring 72. The connecting post 71 is fixedly connected to the locking frame 44, and the end of the connecting post 71 away from the locking frame 44 protrudes from the second connecting plate 43. The second connecting plate 43 has a vertically arranged clearance groove 432, which allows the connecting post 71 to pass through and enables the connecting post 71 to slide smoothly vertically. The connecting ring 72 is a circular ring, and the connecting ring 72 is coaxially sleeved on the outside of the second connecting plate 43. There are two connecting rings 72 arranged vertically at intervals, and both connecting rings 72 are fixedly connected to the connecting rod 61. One end of the connecting post 71 protruding from the clearance groove 432 is located between the two connecting rings 72. Therefore, when the shape memory alloy part 62 drives the connecting rod 61 to move upward, the connecting rod 61 can push the connecting post 71 to move upward through the connecting ring 72. The connecting post 71 pushes the locking frame 44 to move upward until the bottom end of the locking frame 44 is completely disengaged from the receiving groove 81 on the second connecting plate 43, thereby releasing the connection between the second connecting plate 43 and the raft plate 2.

[0045] It should be noted that when the raft plate 2 rotates to the state of closing the valve body 1, the raft plate 2 is still spaced apart from the connecting rod 61. Therefore, the setting of the connecting rod 61 will not affect the normal rotation process of the raft plate 2.

[0046] The implementation principle of Example 1 is as follows: In the initial state, the raft plate 2 is open, and the first elastic element 5 is in an energy storage state. At this time, the lower end of the locking frame 44 is inserted into the receiving groove 81 of the raft plate 2. Through the limiting effect of the sliding block 41, which is not pushed downward by the locking frame 44, the raft plate 2 is locked together with the self-locking second connecting plate 43; at this time, the connecting rod 61 is in the lower position, and the shape memory alloy element 62 is in an elongated state.

[0047] When a fire occurs and the smoke temperature rises to the phase transition temperature of the shape memory alloy component 62, the component contracts, generating a strong pulling force. This force, through the connecting rod 61, rapidly pulls the locking frame 44 upward, causing it to disengage from the receiving groove 81. The sliding block 41 then automatically retracts under the action of the second elastic element 42, instantly disconnecting the connection between the raft plate 2 and the worm gear 31. After the connection is broken, the energy stored in the first elastic element 5 is released, driving the raft plate 2 to rotate rapidly 90° to the closed position. The raft plate 2 then abuts against the limiting plate 11, simultaneously pressing the fireproof sealing strip, thereby effectively preventing the spread of smoke and fire.

[0048] When it is necessary to reset the raft plate 2 from the closed position to the open position, the maintenance personnel first manually press down the connecting rod 61 to allow the locking frame 44 to re-insert into the receiving groove 81 and stretch the shape memory alloy part 62; then, by rotating the worm gear 32, the worm wheel 31 is driven to rotate, thereby causing the second connecting plate 43 and the raft plate 2 to rotate synchronously until the raft plate 2 is reset to the open position, the first elastic element 5 is re-energized, and the self-locking function of the worm wheel 31 and the worm gear 32 keeps the raft plate 2 stably in this state.

[0049] Example 2 Reference Figure 8 , Figure 9 and Figure 10 The difference between this embodiment and Embodiment 1 is that, in this embodiment, the connecting rod 61 adopts an inner and outer split structure. The connecting rod 61 includes a connecting cylinder 611 serving as the outer cylinder and a movable rod 612 slidably inserted inside the connecting cylinder 611. A third elastic element 613, which is a spring, is connected between the bottom end of the movable rod 612 and the bottom wall inside the connecting cylinder 611. A first abutting ring 6121 is coaxially fixedly connected to the outer wall of the movable rod 612, and a second abutting ring 6111 is coaxially fixedly connected to the inner wall of the connecting cylinder 611. Under normal conditions, the third elastic element 613 is in a stretched state, thus causing the first abutting ring 6121 to abut against the second abutting ring 6111.

[0050] During routine maintenance, maintenance personnel do not need any tools. They simply pull the movable rod 612, which is exposed outside the valve body 1, outward a short distance by hand and then release it. Under the action of the third elastic element 613, the movable rod 612 will quickly spring back, causing the first abutment ring 6121 on the movable rod 612 to strike the second abutment ring 6111 on the connecting cylinder 611. The mechanical shock wave generated by the impact will be transmitted along the entire connecting rod 61 to the outer shape memory alloy part 62, causing the shape memory alloy part 62 to vibrate and effectively shake off the dust adhering to the surface of the shape memory alloy part 62. Therefore, it is convenient to clean and remove dust from the shape memory alloy part 62 regularly to ensure its temperature sensitivity.

[0051] The above are optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dustproof, smoke-exhausting, and fireproof damper, characterized in that, include: Valve body (1); A raft plate (2) is rotatably connected to the valve body (1) and is used to control the opening and closing of the valve body (1); The rotating component (3) is connected to the valve body (1) and the raft plate (2) respectively, and is used to drive the raft plate (2) to rotate. The movable end of the rotating component (3) has a self-locking capability. A plug-in assembly (4) is used to detachably connect the movable end of the rotating assembly (3) and the raft plate (2) so that the movable end of the rotating assembly (3) and the raft plate (2) can rotate synchronously or generate relative rotation. The first elastic element (5) is connected between the raft plate (2) and the valve body (1) so that when the raft plate (2) is in the open state, the first elastic element (5) applies an elastic force to the raft plate (2) to reset it to the closed state; The sliding member (6) is slidably connected to the valve body (1). The sliding member (6) is used to connect with the plug-in assembly (4) so ​​that when the sliding member (6) slides, it drives the plug-in assembly (4) to move, and causes the movable end of the rotating assembly (3) and the raft plate (2) to switch between connected and disconnected states.

2. The dustproof, smoke-exhausting, and fireproof valve according to claim 1, characterized in that: The raft plate (2) includes a baffle (21) and a rotating rod (22). The rotating rod (22) is connected to the middle part of the baffle (21) and is rotatably connected to the valve body (1). The first elastic element (5) is connected between the rotating rod (22) and the valve body (1).

3. The dustproof, smoke-exhausting, and fireproof valve according to claim 2, characterized in that: The rotating assembly (3) includes a worm wheel (31) and a worm (32), both of which are rotatably connected to the valve body (1), and the worm (32) meshes with the worm wheel (31).

4. A dustproof, smoke-exhausting, and fireproof valve according to claim 3, characterized in that: The raft plate (2) is connected to a first connecting plate (8) on the side near the worm gear (31), and the first connecting plate (8) has a receiving groove (81); the plug-in assembly (4) includes a sliding block (41), a second elastic element (42), a second connecting plate (43) and a locking frame (44). Multiple sliding blocks (41) are provided, and the multiple sliding blocks (41) are arranged in a ring. The sliding block (41) is slidably connected to the receiving groove (81). The second elastic element (42) is connected between the sliding block (41) and the bottom wall of the receiving groove (81). The second elastic element (42) drives the sliding block (41) to slide outward of the receiving groove (81). The second connecting plate (43) is connected to the worm gear (31). The first end of the locking frame (44) is slidably connected to the second connecting plate (43). The second end of the locking frame (44) is used to insert into the receiving groove (81).

5. A dustproof, smoke-exhausting, and fireproof valve according to claim 4, characterized in that: The sliding block (41) is provided with balls for abutting against the inner wall of the receiving groove (81).

6. A dustproof, smoke-exhausting, and fireproof valve according to claim 4, characterized in that: The sliding member (6) includes a connecting rod (61) and a shape memory alloy member (62). The connecting rod (61) is slidably connected to the valve body (1). One end of the connecting rod (61) is used to connect to the locking frame (44). The shape memory alloy member (62) is connected between the end of the connecting rod (61) away from the locking frame (44) and the valve body (1). The shape memory alloy member (62) is used to shrink after absorbing heat and drive the locking frame (44) to slide out of the receiving groove (81) through the connecting rod (61).

7. A dustproof, smoke-exhausting, and fireproof valve according to claim 6, characterized in that: A connecting assembly (7) is provided between the end of the connecting rod (61) and the locking frame (44). The connecting assembly (7) includes a connecting post (71) and a connecting ring (72). The connecting post (71) is connected to the locking frame (44). The end of the connecting post (71) protrudes from the second connecting plate (43). The connecting ring (72) is connected to the connecting rod (61). There are two connecting rings (72). One end of the connecting post (71) that protrudes from the second connecting plate (43) is located between the two connecting rings (72).

8. A dustproof, smoke-exhausting, and fireproof damper according to claim 6, characterized in that: The connecting rod (61) includes a connecting cylinder (611) slidably connected to the valve body (1) and a movable rod (612) slidably inserted into the connecting cylinder (611). A third elastic element (613) is connected between the connecting cylinder (611) and the movable rod (612). A first abutting ring (6121) is provided on the movable rod (612), and a second abutting ring (6111) is provided on the inner wall of the connecting cylinder (611) for abutting against the first abutting ring (6121).

9. A dustproof, smoke-exhausting, and fireproof valve according to claim 1, characterized in that: The valve body (1) is provided with a limiting plate (11) for abutting against the raft plate (2). When the raft plate (2) closes the valve body (1), the raft plate (2) abuts against the limiting plate (11).

10. A dustproof, smoke-exhausting, and fireproof valve according to claim 1, characterized in that: The valve body (1) is provided with a fireproof sealing strip for abutting against the raft plate (2).

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