Smoke venting fire damper

Abstract

The application discloses a smoke exhaust ventilation fireproof valve, and solves the problem of poor sealing effect of a blade caused by deformation of the blade due to high temperature. The technical scheme is that when a rotating shaft is rotated during excitation of an actuator, a driving element is driven, the driving element pushes a sealing part to adhere to a valve body blade, and when the blade is deformed due to high temperature, the sealing part can actively adhere to the valve body blade, the sealing property between the blade and the sealing part after deformation of the blade of the fireproof valve caused by high temperature is improved, and the safety performance of the fireproof valve is improved.

Description

Technical Field

[0001] This application relates to the technical field of valves, and in particular to a smoke exhaust ventilation fireproof valve. Background Technology

[0002] Currently, smoke exhaust and ventilation fire dampers are normally open valves installed on the ducts of mechanical smoke exhaust systems. They are kept open to meet ventilation needs under normal circumstances, and automatically close when the smoke temperature reaches a certain level during a fire, thus preventing the spread of fire and smoke through the ducts.

[0003] In the existing structure of smoke exhaust and ventilation fire dampers, the fusible metal thermistor melts after reaching the threshold temperature. The actuator controls the rotating shaft to drive the blades to close. The blades are sealed by their contact with each other and with the sealing sheet, preventing the spread of fire and smoke through the pipes.

[0004] For example, CN218598907U discloses a smoke exhaust fire damper. The valve body has a partition plate in the middle to divide the upper and lower chambers. The upper chamber houses an actuator, which includes a connecting rod hinged in the middle. One end of the rod is equipped with a temperature sensor and a tension spring, and the other end abuts against a cam. The connecting rod is also equipped with an electromagnet. The cam is linked with a micro switch. The lower chamber has main and auxiliary blades that are synchronously linked by a flexible rod. Each blade is equipped with a rotating shaft. The main blade is fixed to the cam via the main rotating shaft. It has dual control functions of temperature-triggered and electromagnet-driven electric triggering. When the electromagnet is energized, it can directly drive the valve to close, effectively avoiding the problem of closure failure caused by temperature sensor failure and significantly reducing safety risks.

[0005] The fire damper's blocking effect directly affects the spread of fire. To improve the blocking effect, the common method is to design a sealing structure between the blades after the valve is closed. For example, the multi-blade high-sealing smoke exhaust and ventilation fire damper with announcement number CN206830835U uses a wind baffle strip bent at an obtuse angle, and installs edge sealing plates, middle edge sealing plates and arc-shaped sealing plates on the wind baffle strip. When heated, these seals are tightly attached to the blades, thereby improving the sealing effect and reducing air leakage.

[0006] Regarding the aforementioned technologies, the inventors believe that after the blades of existing smoke exhaust and ventilation fire dampers deform under high temperatures, the sealing between the valve body and the blades decreases, resulting in poor fire containment. Utility Model Content

[0007] In order to improve the sealing performance between the smoke exhaust ventilation fire damper blade and the sealing part after deformation caused by high temperature, and to increase the safety performance of the smoke exhaust ventilation fire damper, this application provides a smoke exhaust ventilation fire damper.

[0008] The smoke exhaust and ventilation fire damper provided in this application adopts the following technical solution: A smoke exhaust ventilation fire damper includes a valve body and valve body blades. The valve body blades are rotatably mounted on an installation port inside the valve body. The valve body has baffles at its upper and lower ends, each baffle having a sliding groove. A sealing element is provided within the baffle, the sealing element comprising a sealing portion and a pressing portion. The sealing portion is located within the sliding groove, and the pressing portion is located on one side of the sealing portion. The damper also includes at least one set of driving components. Each driving component includes a telescopic cylinder, which is slidably connected to the baffle and can act on the pressing portion to force the sealing portion to move within the sliding groove towards the side of the valve body blades.

[0009] By adopting the above technical solution, after the smoke exhaust ventilation fire damper is closed, the sealing element can actively seal with the valve body blade under the action of the telescopic cylinder, and can actively compensate for the deformation of the valve blade caused by high temperature.

[0010] Preferably, the driving component includes a sleeve and a rotating cylinder disposed within the sleeve. The sleeve is connected to a stop bar, and the telescopic cylinder is slidably connected within the telescopic cylinder. A guide post is provided on the outer wall of the telescopic cylinder. An axial groove is provided on the rotating cylinder, and a threaded sliding groove is provided on the sleeve. The guide post slides on the axial groove on the rotating cylinder and the threaded sliding groove on the sleeve.

[0011] By adopting the above technical solution, when the rotating cylinder rotates, because the sleeve is a fixed part, the telescopic cylinder can extend quickly, and quickly push the extrusion part to push out the sealing part to complete the seal between it and the valve body blade, thereby improving the sealing and blocking speed.

[0012] Preferably, the valve body blade includes a first blade and a second blade and a rotating shaft disposed between the first blade and the second blade, and a hollow cavity is formed between the first blade and the second blade.

[0013] By adopting the above technical solution, the temperature on both sides of the smoke exhaust ventilation fire damper can be effectively isolated under the action of the hollow cavity, and the two blades improve the strength of the valve body blades.

[0014] Preferably, it further includes a snap-fit ​​sealing structure formed between two adjacent valve body blades. The snap-fit ​​sealing structure includes a plurality of first protrusions spaced apart on the first blade and a plurality of second protrusions spaced apart on the second blade. A first groove is formed by a gap between two adjacent first protrusions and a second groove is formed by a gap between two adjacent second protrusions. The first protrusions are engaged in the second groove and the second protrusions are engaged in the first groove.

[0015] By adopting the above technical solution, the first convex strip and the second groove are engaged, and the second convex strip and the first groove are engaged to form a labyrinth seal, which allows the two valve body blades to fit and seal better.

[0016] Preferably, the first protrusion and the second groove, as well as the second protrusion and the first groove, have deformation gaps.

[0017] By adopting the above technical solution, when the valve body blades deform under high temperature, the space provided for the lateral expansion of the blades when heated is preset, thereby improving the effectiveness of sealing and increasing the safety performance of the smoke exhaust ventilation fire damper.

[0018] Preferably, it further includes a driven member and an actuator, the driven member being connected to the actuator, the driven member including a linkage mechanism and a gear mechanism, the gear mechanism being connected to the rotating cylinder.

[0019] By adopting the above technical solution, the linkage mechanism converts the output force of the actuator into the torque of the gear, and then transmits the torque to the rotating cylinder through the gear mechanism. The rotating cylinder converts the torque into the thrust of the telescopic cylinder, so that when the valve body blades of the smoke exhaust ventilation fire damper are closed, all the components in the valve body can be started synchronously, and the fixed action of the sealing element does not require an additional power source.

[0020] Preferably, the linkage mechanism includes a plurality of transmission rods and a drive rod, wherein the transmission rods are connected to the actuator, one end of the transmission rod is hinged to the drive rod, and the other end of the drive rod is connected to the valve body blade.

[0021] By adopting the above technical solution, the force provided by the actuator can be efficiently transmitted through the linkage of the transmission rod and the drive rod.

[0022] Preferably, the gear mechanism includes a driving gear, a transition gear, and a driven gear. The driving gear is connected to a rotating shaft, the transition gear meshes with both the driving gear and the driven gear, the driven gear is connected to a rotating cylinder, and the transmission ratio between the transition gear and the driven gear is greater than 1.

[0023] By adopting the above technical solution, the initial torque of the gear mechanism can be reduced, the rotational speed of the rotating cylinder can be increased, the extension speed of the telescopic cylinder can be further improved, and the instantaneousness of the sealing and blocking can be enhanced.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The sealing part is squeezed by the extension and retraction of the telescopic cylinder of the drive component, so that the sealing part can be squeezed out from the sliding groove of the baffle and fit with the valve body blade to form an active compensation seal. At the same time, there is no need to add an additional power source. The sealing part is pushed out by the driving force when the valve blade flips, which effectively reduces the situation of linkage failure caused by high temperature environment interference factors.

[0025] 2. The power of the actuator closing the valve body blades is used to drive the driven component, which is accelerated by the gear mechanism in the driven component. The speed is then transmitted to the driving component, causing the telescopic cylinder in the driving component to extend quickly and push the sealing component to fit against the valve body blades for sealing.

[0026] 3. The valve body blades are designed to provide space for lateral expansion when heated, which improves the effectiveness of sealing. At the same time, the valve blades adopt a two-blade structure, which increases the strength compared to the existing single-blade structure, and the hollow cavity can also play a certain role in heat insulation. Attached Figure Description

[0027] Figure 1 A schematic diagram of the overall structure of the smoke exhaust and ventilation fire damper; Figure 2 A schematic diagram of the installation of the baffle strip for smoke exhaust ventilation fire dampers; Figure 3 A schematic diagram of the power source for the smoke exhaust and ventilation fire damper; Figure 4 A schematic diagram of the baffle strip for a smoke exhaust ventilation fire damper; Figure 5 for Figure 4 A magnified view of a portion of the image; Figure 6 A schematic diagram of the drive mechanism for a smoke exhaust and ventilation fire damper; Figure 7 A schematic diagram of the driven component of a smoke exhaust and ventilation fire damper; Figure 8 A schematic diagram of the valve body blades of a smoke exhaust ventilation fire damper; Figure 9 This is a schematic diagram of the valve body blade structure; Figure 10 This is a schematic diagram of the snap-fit ​​sealing structure of the valve body blades.

[0028] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Valve body blade; 21. First blade; 211. First convex strip; 212. First groove; 22. Second blade; 221. Second convex strip; 222. Second groove; 23. Rotating shaft; 24. Hollow cavity; 3. Seal; 31. Sealing part; 32. Extrusion part; 4. Driving element; 41. Rotating cylinder; 411. Axial groove; 42. Sleeve; 421. Threaded sliding groove; 43. Telescopic cylinder; 431. Guide post; 5. Driven element; 51. Linkage mechanism; 511. Transmission rod; 512. Driving rod; 52. Gear mechanism; 521. Driving gear; 522. Transition gear; 523. Driven gear; 6. Stop bar; 61. Sliding groove; 62. Telescopic groove; 7. Actuator; 71. Swing rod; 72. Temperature sensor. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, 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 belongs. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] This application discloses a smoke exhaust and ventilation fire damper. See also... Figure 1 and Figure 2 It includes a valve body 1 and valve body blades 2. Several valve body blades 2 are rotatably connected to the mounting port of the valve body 1, and the valve body 1 is provided with baffles 6 on the upper and lower inner walls of the mounting port.

[0033] Combination Figure 3 and Figure 4 A driven member 5 is provided on one side of the valve body 1. The driven member 5 is connected to the valve body blade 2. The driven member 5 is connected to the driving member 4 and the actuator 7. The driving member 4 is connected to the stop bar 6. The stop bar 6 has a sliding groove 61 and a telescopic groove 62. The telescopic groove 62 is connected to the sliding groove 61.

[0034] See Figure 5 A sealing element 3 is provided in the sliding groove 61. The sealing element 3 includes a pressing part 32 and a sealing part 31. The pressing part 32 is connected to the sealing part 31 and extends into the telescopic groove 62. The sealing part 31 is provided on the sliding groove 61 of the baffle 6. The cross section of the sealing part 31 is T-shaped to prevent the sealing part 31 from being squeezed out of the sliding groove 61. There is a sliding gap between the sealing part 31 and the sliding groove 61, so that the sealing part 31 can extend out of the baffle 6 and seal with the valve body blade 2.

[0035] See Figure 5 and Figure 6The driving component 4 includes a rotating cylinder 41, a sleeve 42 is rotatably mounted on the outer wall of the rotating cylinder 41, the sleeve 42 is connected to the upper and lower ends of the stop bar 6, a telescopic cylinder 43 is slidably connected on the inner wall of the rotating cylinder 41, an axial groove 411 is provided on the inner wall of the rotating cylinder 41, a threaded sliding groove 421 is provided on the inner wall of the sleeve 42, and the guide post 431 of the telescopic cylinder 43 passes through the axial groove 411 and the threaded sliding groove 421.

[0036] Combination Figure 7 and Figure 8 The driven component 5 includes a linkage mechanism 51, which includes a transmission rod 511 and a drive rod 512. The linkage mechanism 51 is connected to the actuator 7, which is connected to one end of the valve body 1. The actuator 7 is existing technology and will not be described in detail. For example, in the fully automatic actuator of a fireproof smoke exhaust valve disclosed in CN1583197A, when the actuator is activated, the internal main shaft rotates as the output end. When the main shaft cannot be reset, the main shaft is mechanically reset through an internal gear set. A temperature sensor 72 is provided at one end of the actuator 7 near the valve body 1. The temperature sensor 72 passes through a pre-set through hole in the valve body 1. The output end of the actuator 7 is connected to the swing rod 71. The swing rod 71 is driven by the output end of the actuator 7, and the swing angle and swing direction of the swing rod 71 are consistent with those of the drive rod 512. The swing rod 71 is hinged to the transmission rod 511. Multiple drive rods 512 are hinged to one end of the transmission rod 511. The drive rods 512 and the transmission rod 511 are fixed by connecting pins. The drive rods 512 are connected to the rotating shaft 23.

[0037] Combination Figure 7 and Figure 8 The driven member 5 also includes a gear mechanism 52, which is installed in the gear box of the valve body 1. The gear mechanism 52 includes a driving gear 521, several intermediate gears 522 and a driven gear 523. The driving gear 521 is connected to the rotating shafts 23 at both ends. The driving gear 521 meshes with the intermediate gears 522, the intermediate gears 522 mesh with the driven gears 523, and the driven gears 523 are connected to the rotating cylinder 41. The transmission ratio between the intermediate gears 522 and the driven gears 523 is greater than 1. When the rotating shaft 23 rotates, the torque transmitted to the rotating cylinder 41 is reduced and the rotation speed is increased under the action of the gear mechanism 52, so that the telescopic cylinder 43 has sufficient speed to quickly push the extrusion section 32.

[0038] In this embodiment, gear mechanisms 52 are provided at both ends of the linkage mechanism 51. The gear mechanisms 52 are respectively connected to a set of driving members 4. The two sets of driving members 4 are respectively connected to the baffles 6 on both sides. At the same time, the rotating shafts 23 at both ends near the baffles 6 are connected to the driving gear 521.

[0039] Combination Figure 7 and Figure 8The valve body blade 2 includes a first blade plate 21, a second blade plate 22, and a rotating shaft 23. A hollow cavity 24 for isolating high temperature is provided between the first blade plate 21 and the second blade plate 22. Two adjacent valve body blades 2 are engaged with the second groove 222 by the first protrusion 211. The second protrusion 221 and the first groove 212 are engaged to form an engaging and sealing structure. Deformation gaps are provided in the first protrusion 211 and the second groove 222, and in the second protrusion 221 and the first groove 212, to prevent the blades from deforming at high temperature and thus failing to engage. The deformation gaps are between 1mm and 1.5mm. The rotating shaft 23 is rotatably installed on the preset mounting port of the valve body 1. The rotating shaft 23 is connected to the valve body blade 2 by a pin. In the open state, the mounting port of the valve body 1 is in a conductive state.

[0040] During operation: Valve body blade 2 is in the open state. When the temperature sensor 72 reaches the threshold and melts, the smoke exhaust ventilation fire damper actuator 7 is activated, driving the swing rod 71 to swing. The transmission rod 511 is driven by the swing rod 71. At the same time, the drive rod 512, which is hinged to the transmission rod 511, drives the rotating shaft 23 to rotate, causing the valve body blade 2 to close. Adjacent valve body blades 2 are locked together by the locking and sealing structure provided on the first blade plate 21 and the second blade plate 22. At the same time, the drive gear 521 of the rotating shaft 23 drives the transition gear 522. When the transition gear 522 transmits power to the driven gear 523, the torque decreases and the speed increases. The driven gear 523 drives the rotating cylinder 41 to rotate. Through the axial groove 411 and the threaded sliding groove 421 of the sleeve 42, the torque is converted into the thrust of the telescopic cylinder 43, causing the telescopic cylinder 43 to be quickly pushed out. Finally, the extrusion part 32 pushes the sealing part 31 out of the sliding groove 61 of the baffle 6 and seals it with the valve body blade 2.

[0041] When ventilation is needed after the fire is over, turn the handle on the actuator 7, the swing rod 71 swings in the opposite direction, driving the transmission rod 511 and the drive rod 512, causing the rotating shaft 23 to rotate in the opposite direction, the valve body blade 2 to reopen, and at the same time the gear mechanism 52 drives the rotating cylinder 41 to rotate in the opposite direction, causing the telescopic cylinder 43 to retract.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A smoke exhaust ventilation fire damper, comprising a valve body (1) and valve body blades (2), wherein the valve body blades (2) are rotatably mounted on an installation port within the valve body (1), characterized in that, The valve body (1) is provided with baffles (6) at both ends. A sliding groove (61) is provided in the baffle (6). A sealing element (3) is provided in the baffle (6). The sealing element (3) includes a sealing part (31) and a pressing part (32). The sealing part (31) is provided in the sliding groove (61), and the pressing part (32) is provided on one side of the sealing part (31). The valve body (1) also includes at least one set of driving elements (4). The driving element (4) includes a telescopic cylinder (43). The telescopic cylinder (43) is slidably connected in the baffle (6) and can act on the pressing part (32) to force the sealing part (31) to move in the sliding groove (61) and move closer to the valve body blade (2).

2. The smoke exhaust and ventilation fire damper according to claim 1, characterized in that, The driving component (4) includes a sleeve (42) and a rotating cylinder (41) disposed inside the sleeve (42). The sleeve (42) is connected to the baffle (6). The telescopic cylinder (43) is slidably connected inside the rotating cylinder (41). A guide post (431) is provided on the outer wall of the telescopic cylinder (43). An axial groove (411) is provided on the rotating cylinder (41). A threaded sliding groove (421) is provided on the sleeve (42). The guide post (431) slides in the axial groove (411) provided on the rotating cylinder (41) and the threaded sliding groove (421) provided on the sleeve (42).

3. The smoke exhaust and ventilation fire damper according to claim 1, characterized in that, The valve body blade (2) includes a first blade (21) and a second blade (22) and a rotating shaft (23) disposed between the first blade (21) and the second blade (22), and a hollow cavity (24) is formed between the first blade (21) and the second blade (22).

4. A smoke exhaust ventilation fire damper according to claim 3, characterized in that, It also includes a snap-fit ​​sealing structure formed between two adjacent valve body blades (2). The snap-fit ​​sealing structure includes a plurality of first protrusions (211) spaced apart on the first blade (21) and a plurality of second protrusions (221) spaced apart on the second blade (22). A first groove (212) is formed by a gap between two adjacent first protrusions (211) and a second groove (222) is formed by a gap between two adjacent second protrusions (221). The first protrusions (211) are engaged in the second groove (222) and the second protrusions (221) are engaged in the first groove (212).

5. A smoke exhaust ventilation fire damper according to claim 4, characterized in that, The first protrusion (211) and the second groove (222) each have deformation gaps, as do the second protrusion (221) and the first groove (212).

6. A smoke exhaust ventilation fire damper according to claim 2, characterized in that, It also includes a follower (5) connected to an actuator (7), the follower (5) and the actuator (7) the follower (5) includes a linkage mechanism (51) and a gear mechanism (52), the gear mechanism (52) is connected to a rotating cylinder (41).

7. A smoke exhaust ventilation fire damper according to claim 6, characterized in that, The linkage mechanism (51) includes several transmission rods (511) and drive rods (512). The transmission rods (511) are connected to the actuator (7). One end of the transmission rod (511) is hinged to the drive rod (512), and the other end of the drive rod (512) is connected to the valve body blade (2).

8. A smoke exhaust ventilation fire damper according to claim 6, characterized in that, The gear mechanism (52) includes a driving gear (521), a transition gear (522), and a driven gear (523). The driving gear (521) is connected to the rotating shaft (23). The transition gear (522) meshes with the driving gear (521) and the driven gear (523) respectively. The driven gear (523) is connected to the rotating cylinder (41). The transmission ratio between the transition gear (522) and the driven gear (523) is greater than 1.

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