A multi-blade double-layer fireproof shutter

Abstract

This invention discloses a multi-blade double-layer fireproof air damper, comprising a frame and multiple blades. A rotating shaft is fixedly mounted on each blade, and a sliding seat is rotatably mounted on the rotating shaft, the sliding seat being slidably connected to the frame. A crossbar is fixedly mounted on the sliding seat, a sliding block is slidably mounted on the crossbar, and a guide block is fixedly mounted on the sliding block. An inclined groove is provided on the frame, and the guide block is slidably mounted within the inclined groove. A clamping plate is slidably mounted on the frame, and a clamping part is provided on the sliding seat. A clamping groove is provided on the clamping plate, and the clamping part engages with the clamping groove. When the blades are opened, the blades are first rotated open, then the sliding block slides. Under the cooperation of the guide block and the inclined groove, the sliding block drives the sliding seat to slide via the crossbar. The sliding seat, along with the rotating shaft and blades, slides to both sides of the inner wall of the frame, causing the blades to adhere to the inner wall of the frame. This improves the ventilation effect inside the duct after the blades are opened, while also preventing the blades from being deformed due to prolonged exposure to the wind pressure inside the duct.

Description

Technical Field

[0001] This invention relates to the field of fireproof ventilation damper technology, specifically to a multi-bladed double-layer fireproof ventilation damper. Background Technology

[0002] A fire damper is a device used in buildings, industrial facilities, and other locations requiring fire protection. Its main function is to control airflow during a fire, while effectively preventing the spread of flames, smoke, and high-temperature gases through ventilation ducts, thereby achieving fire prevention and safety isolation.

[0003] When the existing air damper is used in the open state, the air volume in the ventilation duct is large, and the damper blades will be subjected to ventilation pressure. This not only reduces the ventilation performance of the duct, but also puts pressure on the blades during the ventilation process. As a result, after long-term use, the blades and the blade shaft will deform, affecting performance. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-bladed double-layer fireproof air damper to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A multi-blade double-layer fireproof air damper includes a frame and multiple blades. A rotating shaft is fixedly installed on each blade, and a sliding seat is rotatably installed on the rotating shaft. The sliding seat is slidably connected to the frame. The sliding seat is fixedly provided with a crossbar, a sliding block is slidably provided on the crossbar, a guide block is fixedly provided on the sliding block, an inclined groove is provided on the frame, and the guide block is slidably provided in the inclined groove; A clamping plate is slidably disposed on the frame, a clamping part is disposed on the sliding seat, a clamping groove is disposed on the clamping plate, and the clamping part engages with the clamping groove.

[0006] Preferably, a push-pull seat is slidably disposed on the frame, and a long rod is fixedly disposed on the push-pull seat, the long rod being slidably connected to the sliding block.

[0007] Preferably, one end of the connecting rod is rotatably mounted on the push-pull seat, and the other end of the connecting rod is rotatably mounted on a pressure plate. A first fixing post is fixedly mounted on the frame, and the pressure plate is slidably connected to the first fixing post.

[0008] Preferably, a second spring is provided between the pressure plate and the frame, and the two ends of the second spring are fixedly connected to the pressure plate and the frame, respectively.

[0009] Preferably, a plurality of first springs are provided between the clamping plate and the frame, and the two ends of the first springs are fixedly connected to the clamping plate and the frame, respectively.

[0010] Preferably, a second fixing post is fixedly provided on the frame, a long tube is slidably provided on the second fixing post, a lifting block is slidably provided on the long tube, a protrusion is fixedly provided on the rotating shaft, a spiral groove is provided on the lifting block, and the protrusion is provided in the spiral groove.

[0011] Preferably, a plug rod is slidably disposed on the long tube, and a straight rod is fixedly disposed on the frame. The plug rod abuts against the straight rod, and a plug groove is provided on the straight rod. The plug rod is slidably plugged into the plug groove.

[0012] Preferably, a lifting plate is slidably disposed on the first fixed column, a lifting rod is fixedly disposed on the lifting plate, a limit groove is provided on the plug rod, and one end of the lifting rod is slidably disposed in the limit groove; The lifting rod abuts against the pressure plate.

[0013] Preferably, a driving device is fixedly installed on the frame, and a screw is fixedly installed on the drive shaft of the driving device, and the screw is threadedly connected to the lifting plate.

[0014] Preferably, a ball bearing is rotatably mounted on the lower sliding seat, and the ball bearing contacts the frame.

[0015] In the above technical solution, the multi-blade double-layer fireproof air damper provided by the present invention has the following beneficial effects: When opening the blades, first rotate the blades to open them, then slide the sliding block. With the cooperation of the guide block and the inclined groove, the sliding block drives the sliding seat to slide through the crossbar. The sliding seat, along with the rotating shaft and the blades, slides to both sides of the inner wall of the frame, and the blades fit against the inner wall of the frame. After the blades are opened, the ventilation effect in the duct is improved, and the blades are also prevented from being deformed by the wind pressure in the duct for a long time.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0017] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the external structure of the frame provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the frame provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the top structure within the frame provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the push-pull seat and pressure plate structure inside the frame provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the lifting plate and lifting block structure inside the frame provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the sliding seat structure provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the lifting plate and long tube structure provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the lifting block structure provided in an embodiment of the present invention; Figure 9 The images show a top view and a partial enlarged view of the frame provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Frame; 11. Inclined groove; 12. First fixed post; 13. Second fixed post; 14. Straight rod; 15. Insertion groove; 2. Blade; 21. Rotating shaft; 22. Protrusion; 3. Sliding seat; 31. Clamping part; 32. Crossbar; 33. Sliding block; 34. Guide block; 35. Ball bearing; 4. Clamping plate; 41. First spring; 42. Clamping groove; 5. Push-pull seat; 51. Long rod; 52. Connecting rod; 53. Pressure plate; 54. Second spring; 6. Lifting plate; 61. Lifting rod; 7. Long tube; 71. Insertion rod; 72. Limiting groove; 8. Lifting block; 81. Spiral groove; 9. Drive device; 91. Screw. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0022] Please see Figure 1-9A multi-blade double-layer fireproof airlock includes a frame 1 and multiple blades 2. A rotating shaft 21 is fixedly mounted on each blade 2, and a sliding seat 3 is rotatably mounted on the rotating shaft 21. The sliding seat 3 is slidably connected to the frame 1. A crossbar 32 is fixedly mounted on the sliding seat 3, and a sliding block 33 is slidably mounted on the crossbar 32. A guide block 34 is fixedly mounted on the sliding block 33. An inclined groove 11 is provided on the frame 1, and the guide block 34 is slidably mounted within the inclined groove 11. A clamping plate 4 is slidably mounted on the frame 1, and a clamping part 31 is provided on the sliding seat 3. A clamping groove 42 is provided on the clamping plate 4, and the clamping part 31 engages with the clamping groove 42. When opening the airlock, first... When blade 2 rotates and opens, the sliding block 33 slides under the cooperation of guide block 34 and inclined groove 11, and the sliding block 33 drives the sliding seat 3 to slide through crossbar 32. The sliding seat 3, along with the rotating shaft 21 and blade 2, slides to both sides of the inner wall of frame 1, and makes blade 2 fit against the inner wall of frame 1. This prevents the opening of blade 2 from affecting the ventilation in the pipe, and also prevents blade 2 from being deformed due to long-term exposure to the wind pressure in the pipe. At the same time, when blade 2 is in the closed state, clamping plate 4 clamps the clamping part 31 of sliding seat 3 through clamping groove 42 to prevent smoke from entering the interior of frame 1 in the event of a fire.

[0023] Specifically, a push-pull seat 5 is slidably mounted on the frame 1, and a long rod 51 is fixedly mounted on the push-pull seat 5. The long rod 51 is slidably connected to the sliding block 33. When the push-pull seat 5 drives the long rod 51 to slide, the long rod 51 drives the sliding block 33. Under the cooperation of the guide block 34 and the inclined groove 11, the sliding block 33 drives the blade 2 to slide to both sides of the frame 1 through the long rod 51. It should be noted that the inclined groove 11 in this invention is provided with different specifications, which can be set according to the actual sliding distance required for the blade 2.

[0024] In a further embodiment of the present invention, one end of a connecting rod 52 is rotatably mounted on the push-pull seat 5, and the other end of the connecting rod 52 is rotatably mounted on a pressure plate 53. A first fixing post 12 is fixedly mounted on the frame 1. The pressure plate 53 is slidably connected to the first fixing post 12. When the pressure plate 53 moves downward, it pushes the push-pull seat 5 to slide through the connecting rod 52, thereby causing the sliding block 33 to drive the sliding seat 3 through the long rod 51, so that the blade 2 slides to both sides of the inner wall of the frame 1.

[0025] Furthermore, a second spring 54 is provided between the pressure plate 53 and the frame 1. The two ends of the second spring 54 are fixedly connected to the pressure plate 53 and the frame 1 respectively. During the downward movement of the pressure plate 53, the second spring 54 is squeezed. In the event of a fire, when it is necessary to close the blade 2, the pressure plate 53 is raised and reset under the action of the second spring 54, and the push-pull seat 5 is slid reset through the connecting rod 52, thereby resetting the blade 2 to slide to the middle position of the frame 1, and then the blade 2 is rotated to close.

[0026] Furthermore, multiple first springs 41 are provided between the clamping plate 4 and the frame 1. The two ends of each first spring 41 are fixedly connected to the clamping plate 4 and the frame 1, respectively. When the sliding seat 3, the rotating shaft 21, and the blade 2 slide to the side wall position of the frame 1, the inclined surface on the clamping part 31 pushes the clamping plate 4 to slide, compressing the first springs 41. When the blade 2 returns to its original position and closes, under the action of the first springs 41, the clamping groove 42 clamps the clamping part 31 as the clamping plate 4 slides. The clamping plates 4 on both sides... To prevent smoke from entering the frame 1 in the event of a fire, a sealing strip can be installed on the clamping plate 4 as needed to improve its sealing performance. At the same time, the bottom of the frame 1 is equipped with a clamping plate 4 to clamp the sliding seat 3, just like the top. The sliding seat 3 located below is equipped with rolling balls 35, which contact the frame 1. By setting the balls 35, the resistance encountered by the sliding seat 3 during the sliding process is reduced, and the stability of the blade 2 when sliding to both sides of the inner wall of the frame 1 is improved.

[0027] In a further embodiment of the present invention, a second fixed post 13 is fixedly provided on the frame 1, a long tube 7 is slidably provided on the second fixed post 13, a lifting block 8 is slidably provided on the long tube 7, a protrusion 22 is fixedly provided on the rotating shaft 21, a spiral groove 81 is provided on the lifting block 8, and the protrusion 22 is provided in the spiral groove 81. During the descent of the long tube 7, it drives the lifting block 8 to descend, and through the cooperation of the spiral groove 81 on the lifting block 8 and the protrusion 22, the rotation of the rotating shaft 21 is completed, thereby realizing the opening of the blade 2.

[0028] In the embodiment provided by the present invention, a plug rod 71 is slidably arranged on the long tube 7, and a straight rod 14 is fixedly arranged on the frame 1. The plug rod 71 abuts against the straight rod 14, and a plug groove 15 is provided on the straight rod 14. The plug rod 71 and the plug groove 15 are slidably plugged into each other. After the long tube 7 moves down and the blade 2 rotates and opens, the plug rod 71 is plugged into the plug groove 15. The lifting and lowering of the long tube 7 and the lifting block 8 are locked by the plug rod 71 to ensure the stability of the blade 2 after it is opened.

[0029] Specifically, a lifting plate 6 is slidably mounted on the first fixed column 12, and a lifting rod 61 is fixedly mounted on the lifting plate 6. A limiting groove 72 is provided on the insertion rod 71, and one end of the lifting rod 61 is slidably mounted in the limiting groove 72. The limiting groove 72 includes an inclined part and a vertical part. The lifting rod 61 abuts against the pressure plate 53. During the downward movement of the lifting plate 6, the insertion rod 71 abuts against the straight rod 14, and the insertion rod 71 will not slide laterally. At this time, through the cooperation of the inclined part of the lifting rod 61 and the limiting groove 72, the lifting rod 61 carries the insertion rod 71 and the long tube 7 downward, thereby completing the rotation and opening of the blade 2. Then, the insertion rod 71 moves to the insertion slot 15 position, and under the action of the lifting rod 61 moving downward, the lifting rod 61 pushes the inclined part of the limiting slot 72, causing the insertion rod 71 to slide and insert into the insertion slot 15, thereby completing the locking of the blade 2 after it is rotated open. After the insertion rod 71 is inserted into the insertion slot 15, the lifting rod 61 moves to the vertical part of the limiting slot 72. At this time, the lifting rod 61 continues to descend without affecting the insertion rod 71. Furthermore, when the lifting rod 61 is in the vertical position, the insertion rod 71 cannot slide laterally, preventing the insertion rod 71 from disengaging from the insertion slot 15, and further improving the stability of the blade 2 after it is opened.

[0030] In a further embodiment of the present invention, a driving device 9 is fixedly installed on the frame 1, and a screw 91 is fixedly installed on the drive shaft of the driving device 9. The screw 91 is threadedly connected to the lifting plate 6. The driving device 9 drives the screw 91 to rotate, thereby raising and lowering the lifting plate 6, completing the operation of rotating and opening the blade 2, and sliding the blade 2 to both sides of the inner wall of the frame 1. The driving device 9 is used to autonomously drive the screw 91 to rotate and close the air damper in the event of a fire. This is prior art, and its implementation method and the resulting effects are common knowledge and conventional technical means known to those skilled in the art, and will not be described in detail.

[0031] Working principle: When blade 2 opens, drive device 9 drives screw 91 to rotate. During rotation, lifting plate 6 moves downward. During the downward movement, lifting rod 61 is located at the inclined position of limit groove 72. Because lifting rod 61 abuts against straight rod 14, insertion rod 71 cannot slide. At this time, lifting rod 61 moves downward with insertion rod 71 and long tube 7. During the downward movement of long tube 7, lifting block 8 moves downward. Through the cooperation of spiral groove 81 on lifting block 8 and protrusion 22 on rotating shaft 21, rotating shaft 21 drives blade 2 to rotate and open. After blade 2 opens, insertion rod 71 moves downward to insertion groove 15. At this time, lifting plate 6 and lifting rod 61 continue to move downward, and through the inclined part of limit groove 72, insertion rod 71 slides and inserts into insertion groove 15, thus completing the locking after blade 2 rotates and opens. Subsequently, lifting plate 6... As the lifting rod 61 continues to move downward, it moves to the vertical part of the limiting groove 72, so that the lifting rod 61 is not affected by the plug rod 71 during the downward movement. The lifting plate 6 continues to move downward and presses down on the pressure plate 53. During the pressing process, the pressure plate 53 moves downward and pushes the push-pull seat 5 and the long rod 51 to slide through the connecting rod 52. During the sliding process, the long rod 51 pushes the sliding block 33. Under the action of the guide block 34 and the inclined groove 11, the sliding block 33 slides along the inclined groove 11 and drives the sliding seat 3, the rotating shaft 21 and the blade 2 to slide through the cross rod 32. During the sliding, the clamping plate 4 is pushed open by the inclined surface of the clamping part 31, so that the blade 2 slides to both sides of the frame 1 and contacts the frame 1. This can effectively reduce the interference of the blade 2 on ventilation and avoid the phenomenon that the blade 2 is easily deformed by wind pressure after long-term use. In the event of a fire, the drive device 9 is activated, causing the screw 91 to reverse. First, the sliding seat 3 slides back to its original position, and then the blade 2 rotates to close, which is the opposite of the opening step of the blade 2. After the sliding seat 3 slides back to its original position, under the action of the first spring 41, the clamping plate 4 clamps the clamping part 31 on the sliding seat 3 through the clamping groove 42 to prevent smoke and gas from entering the frame 1.

[0032] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-bladed double-layer fireproof damper, comprising a frame (1) and multiple blades (2), characterized in that, A rotating shaft (21) is fixedly provided on the blade (2), and a sliding seat (3) is rotatably provided on the rotating shaft (21). The sliding seat (3) is slidably connected to the frame (1). A crossbar (32) is fixedly provided on the sliding seat (3), a sliding block (33) is slidably provided on the crossbar (32), a guide block (34) is fixedly provided on the sliding block (33), an inclined groove (11) is provided on the frame (1), and the guide block (34) is slidably provided in the inclined groove (11); A clamping plate (4) is slidably disposed on the frame (1), a clamping part (31) is disposed on the sliding seat (3), and a clamping groove (42) is disposed on the clamping plate (4). The clamping part (31) engages with the clamping groove (42).

2. The multi-blade double-layer fireproof air damper according to claim 1, characterized in that, A push-pull seat (5) is slidably disposed on the frame (1), and a long rod (51) is fixedly disposed on the push-pull seat (5). The long rod (51) is slidably connected to the sliding block (33).

3. A multi-blade double-layer fireproof air damper according to claim 2, characterized in that, One end of a connecting rod (52) is rotatably mounted on the push-pull seat (5), and the other end of the connecting rod (52) is rotatably mounted on a pressure plate (53). A first fixing post (12) is fixedly mounted on the frame (1), and the pressure plate (53) is slidably connected to the first fixing post (12).

4. A multi-blade double-layer fireproof air damper according to claim 3, characterized in that, A second spring (54) is provided between the pressure plate (53) and the frame (1), and the two ends of the second spring (54) are fixedly connected to the pressure plate (53) and the frame (1) respectively.

5. A multi-blade double-layer fireproof air damper according to claim 1, characterized in that, Multiple first springs (41) are provided between the clamping plate (4) and the frame (1), and the two ends of the first springs (41) are fixedly connected to the clamping plate (4) and the frame (1) respectively.

6. A multi-blade double-layer fireproof air damper according to claim 3, characterized in that, A second fixed column (13) is fixedly installed on the frame (1), a long tube (7) is slidably installed on the second fixed column (13), a lifting block (8) is slidably installed on the long tube (7), a protrusion (22) is fixedly installed on the rotating shaft (21), a spiral groove (81) is provided on the lifting block (8), and the protrusion (22) is located in the spiral groove (81).

7. A multi-blade double-layer fireproof air damper according to claim 6, characterized in that, A plug rod (71) is slidably disposed on the long tube (7), and a straight rod (14) is fixedly disposed on the frame (1). The plug rod (71) abuts against the straight rod (14), and a plug groove (15) is disposed on the straight rod (14). The plug rod (71) and the plug groove (15) are slidably plugged into each other.

8. A multi-blade double-layer fireproof air damper according to claim 7, characterized in that, A lifting plate (6) is slidably provided on the first fixed column (12), and a lifting rod (61) is fixedly provided on the lifting plate (6). A limit groove (72) is provided on the plug rod (71), and one end of the lifting rod (61) is slidably provided in the limit groove (72). The lifting rod (61) abuts against the pressure plate (53).

9. A multi-blade double-layer fireproof air damper according to claim 7, characterized in that, A drive device (9) is fixedly installed on the frame (1), and a screw (91) is fixedly installed on the drive shaft of the drive device (9). The screw (91) is threadedly connected to the lifting plate (6).

10. A multi-blade double-layer fireproof air damper according to claim 1, characterized in that, A ball bearing (35) is rolled on the sliding seat (3) located below, and the ball bearing (35) contacts the frame (1).

Images