Fireproof ventilation opening

Abstract

The utility model relates to the technical field of fireproof ventilation openings, in particular to a fireproof ventilation opening, which comprises a ventilation pipe, a rotating shaft is rotatably connected in the ventilation pipe, a plugging structure is arranged on the rotating shaft, the plugging structure comprises 2n plugging petals circumferentially arranged on the rotating shaft, n plugging petals are circumferentially and uniformly distributed and fixedly mounted on the rotating shaft, the other n plugging petals are respectively inserted between two adjacent plugging petals and can slide along the circumferential direction of the rotating shaft; the device further comprises a stretching mechanism and a combustible supporting mechanism which are matched with the slidable plugging petals; the n slidable plugging petals are staggered with the n plugging petals fixed to the rotating shaft under the action of the stretching mechanism and the combustible supporting mechanism, and ventilation gaps are formed. The automatic sealing device has the automatic sealing function, and ventilation is accelerated during normal ventilation.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof vents, in particular to a fireproof vent. Background Art

[0002] In construction projects, vents are generally added to the top of the building for ventilation convenience. While adding vents to facilitate ventilation, there is also a risk of fire spreading. When a fire occurs, there is also a risk of adding oxygen to the air for the fire, and it also accelerates combustion, which brings a risk of combustion. For this reason, fireproof vents are generally used. Existing fireproof vents generally use electric means to cut off the vents. However, this will burn out the electronic drive components when a fire occurs, and then the fire protection will fail. For this reason, a fireproof vent with an automatic closing function and accelerated ventilation during normal ventilation is designed. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies of the prior art, the utility model provides a fireproof vent which has an automatic closing function and accelerates ventilation during normal ventilation.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fireproof vent, comprising a ventilation pipe, wherein a rotating shaft is rotatably connected in the ventilation pipe, and a sealing structure is arranged on the rotating shaft, wherein the sealing structure comprises 2n sealing flaps circumferentially arranged on the rotating shaft, wherein n sealing flaps are circumferentially evenly distributed and fixedly installed on the rotating shaft, and the other n sealing flaps are inserted between two adjacent sealing flaps and can slide along the circumferential direction of the rotating shaft, and also comprises a stretching mechanism and a combustible supporting mechanism adapted to the slidable sealing flaps, and the n slidable sealing flaps are staggered with the n sealing flaps fixed on the rotating shaft under the action of the stretching mechanism and the combustible supporting mechanism and have a ventilation gap, and when a fire occurs, the combustible supporting mechanism loses its supporting force, and the n slidable sealing flaps are moved to a position merged with the n sealing flaps fixed on the rotating shaft under the action of the stretching mechanism, so that the 2n sealing flaps merge to seal the ventilation pipe, and the 2n sealing flaps are each provided with a guide vane.

[0007] Preferably, the combustible support mechanism includes a hot melt roller and a traction rope, a fixed roller is fixedly mounted on the sealing flap, the hot melt roller is connected to the fixed frame via a screwing assembly, and the traction rope passes around the fixed roller and both ends are fixedly connected to the hot melt roller.

[0008] Preferably, the screwing assembly includes a screw rod fixedly connected to the hot melt roller, an adjusting button is fixedly connected to a side of the hot melt roller away from the screw rod, and a screw sleeve threadably connected to the screw rod is fixedly connected to the fixing frame.

[0009] Preferably, the stretching mechanism comprises a stretching spring, a fixing frame which can be hidden in the slidable blocking flap is fixedly mounted on the rotating shaft, and two ends of the stretching spring are respectively fixedly connected to the fixing frame and the inside of the rotating shaft.

[0010] Preferably, the blocking structures are provided in two groups and are symmetrically arranged on the rotating shaft, and the guide vanes on the two groups have the same guiding direction.

[0011] (III) Beneficial effects

[0012] Compared with the prior art, the utility model provides a fireproof vent with the following beneficial effects:

[0013] The fireproof vent, through the stretching mechanism and the combustible supporting mechanism, can make the n slidable sealing flaps staggered with the n sealing flaps fixed on the rotating shaft under the action of the stretching mechanism and the combustible supporting mechanism and have a ventilation gap, and each of the sealing flaps is fixedly connected with a guide vane, which can accelerate the air circulation during the ventilation process. When a fire occurs, the combustible supporting mechanism loses its supporting force, so that the movable sealing flap, under the action of the stretching mechanism, slides to the position of the sealing flap fixed to the rotating shaft, and completes the merger with the sealing flap fixed on the rotating shaft, so that the ventilation pipe is blocked by 2n sealing flaps, which plays a fire prevention role and solves the risk of failure that is easy to occur when using electric drive for closed fire prevention. At the same time, it also meets the requirement of accelerated ventilation. The fireproof vent has an automatic closing function and accelerates ventilation during normal ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the utility model without ventilation pipes;

[0016] Figure 3 For this utility model Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0017] Figure 4 This is a schematic diagram of the structure of the cooperation between the rotating shaft, the fixing frame and the screwing assembly of the utility model;

[0018] Figure 5 It is a schematic structural diagram of the rotating shaft and the 2n occluding flaps in the utility model when the 2n occluding flaps are in a combined state.

[0019] Markings in the attached drawings: 1. ventilation duct; 2. rotating shaft; 3. sealing flap; 4. guide vane; 5. supporting frame; 6. guide slot; 7. fixing frame; 8. tension spring; 9. fixing roller; 10. guide roller; 11. hot melt roller; 12. screw; 13. screw sleeve; 14. adjusting button; 15. traction rope; 16. groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] See also Figure 1-5 A fireproof vent includes a ventilation pipe 1, a rotating shaft 2 is rotatably connected inside the ventilation pipe 1, a blocking structure is arranged on the rotating shaft 2, the blocking structure includes 2n blocking flaps 3 circumferentially arranged on the rotating shaft 2, wherein n blocking flaps 3 are evenly distributed circumferentially and fixedly installed on the rotating shaft 2, and the other n blocking flaps 3 are inserted between two adjacent blocking flaps 3 and can slide along the circumferential direction of the rotating shaft 2, and also includes a stretching mechanism and a combustible supporting mechanism adapted to the slidable blocking flaps 3. Under the action of the stretching mechanism and the combustible supporting mechanism, the n slidable blocking flaps 3 are staggered with the n blocking flaps 3 fixed on the rotating shaft 2 and have a ventilation gap. When a fire occurs During a fire, the combustible support mechanism loses its supporting force, and the n slidable sealing flaps 3 are moved to a position where they merge with the n sealing flaps 3 fixed on the rotating shaft 2 under the action of the stretching mechanism, so that the 2n sealing flaps 3 merge to seal the ventilation pipe 1, and the 2n sealing flaps 3 are fixedly connected with guide vanes 4. Furthermore, a guide slot 6 is provided on the rotating shaft 2, and a guide slider slidably matched with the guide slot 6 is fixedly connected to the slidable sealing flap 3. Both ends of the rotating shaft 2 are rotatably connected to the ventilation pipe 1 through a support frame 5. Furthermore, a groove 16 adapted to the fixing frame 7 is provided on the slidable sealing flap 3.

[0023] Specifically, the flammable supporting mechanism includes a hot melt roller 11 and a traction rope 15. A fixed roller 9 is fixedly installed on the sealing flap 3. The hot melt roller 11 is connected to the fixed frame 7 through a screwing assembly. The traction rope 15 passes around the fixed roller 9 and is fixedly connected to the hot melt roller 11 at both ends. Through the setting of the traction rope 15, the traction force can be maintained between the fixed frame 7 and the sealing flap 3. The hot melt roller 11 can be driven to rotate through the screwing assembly, so that the traction rope 15 can be pulled in, so as to adjust the distance between the sealing flap 3 and the fixed frame 7. When burning, the hot melt roller 11 is melted, so that the traction rope 15 is disconnected, so that the flammable supporting mechanism releases the support for the sealing flap 3. Furthermore, a guide roller 10 for guiding the traction rope 15 is rotatably connected to the fixed frame 7. Through the guide roller 10, the length of the traction rope 15 is correspondingly extended to increase the adjustable range.

[0024] Specifically, the screwing assembly includes a screw 12 fixedly connected to the hot melt roller 11, an adjusting button 14 is fixedly connected to the side of the hot melt roller 11 away from the screw 12, and a screw sleeve 13 threadedly connected to the screw 12 is fixedly connected to the fixed frame 7. The hot melt roller 11 and the screw 12 can be driven to rotate through the adjusting button 14, and the screw 12 can be rotated into the screw sleeve 13. The tightness of the traction rope 15 can be adjusted by forward and reverse adjustment.

[0025] Specifically, the stretching mechanism includes a stretching spring 8, and a fixing frame 7 that can be hidden in the slidable blocking flap 3 is fixedly installed on the rotating shaft 2. The two ends of the stretching spring 8 are respectively fixedly connected to the fixing frame 7 and the inside of the rotating shaft 2. Through the stretching spring 8, a stretching force can be created between the fixing frame 7 in the slidable blocking flap 3 and the movable blocking flap 3, so that the movable fixing frame 7 has a tendency to be pulled toward the side of the fixing frame 7.

[0026] Specifically, the blocking structure is provided in two groups and symmetrically arranged on the rotating shaft 2, and the guide vanes 4 on the two groups have the same guiding direction. Setting up two groups of blocking structures can increase the blocking efficiency, improve the fire protection performance, and simultaneously increase the ventilation efficiency.

[0027] During use, during normal use, through the guide vanes 4 on the sealing flap 3, in the ventilation state, the guide vanes 4, the sealing flap 3 and the rotating shaft 2 are driven to rotate as a whole in the ventilation pipe 1, so that the air passes through the ventilation gap from one side and then to the other side. When a fire occurs, the combustible support mechanism burns and loses its supporting force, so that under the action of the stretching mechanism, the slidable sealing flap 3 moves to the position of the sealing flap 3 fixed to the rotating shaft 2, thereby completing the merging of 2n sealing flaps 3, thereby sealing the inner wall of the ventilation pipe 1 and achieving the purpose of fire prevention.

[0028] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0029] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0030] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0031] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fireproof vent, comprising a vent pipe (1), characterized in that: A rotating shaft (2) is rotatably connected inside the ventilation pipe (1), and a blocking structure is arranged on the rotating shaft (2). The blocking structure comprises 2n blocking flaps (3) circumferentially arranged on the rotating shaft (2), wherein n blocking flaps (3) are evenly distributed in the circumferential direction and fixedly installed on the rotating shaft (2), and the other n blocking flaps (3) are inserted between two adjacent blocking flaps (3) and can slide along the circumferential direction of the rotating shaft (2). The blocking structure also comprises a stretching mechanism and a combustible support mechanism adapted to the slidable blocking flaps (3). The n blocking flaps (3) are staggered with the n blocking flaps (3) fixed on the rotating shaft (2) under the action of the stretching mechanism and the combustible support mechanism and have ventilation gaps. When a fire occurs, the combustible support mechanism loses its supporting force, and the n slidable blocking flaps (3) are moved to a position where they merge with the n blocking flaps (3) fixed on the rotating shaft (2) under the action of the stretching mechanism, so that the 2n blocking flaps (3) merge to block the ventilation pipe (1), and the 2n blocking flaps (3) are each provided with a guide vane (4).

2. The fireproof vent according to claim 1, characterized in that: The combustible support mechanism comprises a hot melt roller (11) and a traction rope (15); a fixed roller (9) is fixedly mounted on the sealing flap (3); the hot melt roller (11) is connected to a fixed frame (7) via a screwing assembly; the traction rope (15) passes around the fixed roller (9) and both ends of the traction rope are fixedly connected to the hot melt roller (11).

3. The fireproof vent according to claim 2, characterized in that: The screwing assembly comprises a screw rod (12) fixedly connected to the hot melt roller (11); an adjusting button (14) is fixedly connected to the side of the hot melt roller (11) away from the screw rod (12); and a screw sleeve (13) threadedly connected to the screw rod (12) is fixedly connected to the fixing frame (7).

4. The fireproof vent according to claim 3, characterized in that: The stretching mechanism comprises a stretching spring (8), a fixing frame (7) which can be hidden in a slidable blocking flap (3) is fixedly mounted on the rotating shaft (2), and two ends of the stretching spring (8) are respectively fixedly connected to the fixing frame (7) and the inside of the rotating shaft (2).

5. The fireproof vent according to claim 4, characterized in that: The blocking structures are arranged in two groups and are symmetrically arranged on the rotating shaft (2), and the flow guiding directions of the flow guiding blades (4) in the two groups are the same.

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