Blade linkage type fireproof valve

Abstract

The utility model relates to the technical field of fireproof valves, and discloses a blade linkage type fireproof valve. The fireproof valve comprises a shell, blades, a linkage mechanism, a handle and an executing mechanism, the executing mechanism is arranged on the shell, the linkage mechanism comprises a connecting rod and connecting pieces, the connecting pieces are arranged on the connecting rod at equal intervals and connected with the blades respectively, the blades are arranged on the shell through a rotating shaft, and the handle is arranged on the shell. A rotating shaft extends out of the shell and is connected with the handle and the actuating mechanism. According to the fireproof valve, when the handle rotates, the rotating shaft is driven to rotate, the rotating shaft drives the blades to rotate at the same time, the fireproof valve is in an opened or closed state, the opening angles of the blades can be adjusted, and the ventilation quantity can be conveniently adjusted; when the fusing temperature is reached, the executing mechanism enables the multiple blades to rotate together through the rotating shaft, so that the fireproof valve is closed, and smoke and fire are blocked; when the fireproof valve is closed, the edges of the adjacent blades are overlapped and attached to each other, so that gaps between the adjacent blades are reduced, and the air leakage rate is reduced.

Description

Technical Field

[0001] The utility model embodiment relates to the technical field of fire dampers, and in particular to a blade-linked fire damper. Background Art

[0002] Fire dampers are installed on the supply and return air ducts of the ventilation or air-conditioning system. Normally, the blades of the fire dampers are in an open state, and the fire dampers are open to achieve ventilation effects.

[0003] The fire damper is equipped with an actuator. In the event of a fire, when the gas temperature in the pipeline reaches 70°C (melting temperature), the fusible link of the fire damper actuator will melt, and the blades of the fire damper will rotate under the action of the torsion spring force of the actuator, causing the fire damper to close automatically. It can meet the requirements of fire resistance stability and fire resistance integrity within a certain period of time, and play a role in isolating smoke and preventing fire.

[0004] The inventor of the present application has found that the current fire damper is inconvenient to adjust the rotation of the blades, and the gaps between the blades are relatively large. Utility Model Content

[0005] The utility model aims to provide a blade-linked fire damper to solve the problems in the above-mentioned background technology.

[0006] The utility model embodiment provides a blade linkage type fire damper, comprising: a housing, a blade, a linkage mechanism, a handle and an actuator;

[0007] The housing is in a rectangular frame shape;

[0008] The actuator is arranged on the housing;

[0009] The blades are provided in plurality;

[0010] The linkage mechanism comprises: a connecting rod and a connecting piece;

[0011] The connecting pieces are provided in plurality, and the connecting pieces are arranged on the connecting rod at equal intervals, and are rotatably connected to the connecting rod, and the connecting pieces are respectively fixedly connected to the blades;

[0012] The plurality of blades are rotatably arranged on the housing through shafts, and one of the shafts extends out of the housing and is connected to the handle and the actuator. The handle is used to drive the blades to rotate, and the actuator is used to drive the blades to rotate when the fusing temperature is reached to close the fire damper.

[0013] When the fire damper is closed, two adjacent blades overlap each other.

[0014] Based on the above scheme, it can be known that the blade linkage fire damper of the utility model is provided with a housing, blades, a linkage mechanism, a handle and an actuator. The actuator is provided on the housing, and the linkage mechanism includes: a connecting rod and a connecting piece. A plurality of connecting pieces are provided on the connecting rod at equal intervals, and the connecting pieces are respectively connected to the blades. A plurality of blades are rotatably provided on the housing through a rotating shaft, and one of the rotating shafts extends out of the housing and is connected to the handle and the actuator. When the fire damper is closed, two adjacent blades overlap each other. The blade linkage fire damper of the utility model has blades provided on the housing through a rotating shaft, connected through a linkage mechanism, and one of the rotating shafts extends out of the housing and is connected to the handle and the actuator. The handle is turned to drive the shaft to rotate, and the shaft drives the blades to rotate when rotating, and the linkage mechanism makes multiple blades rotate at the same time, so that the fire damper is in an open or closed state, and the opening angle of the blades can be adjusted through the handle to facilitate the adjustment of ventilation volume; when the fuse temperature is reached, the actuator drives the shaft to rotate, and makes multiple blades rotate together to close the fire damper to block the entry of smoke and fire; when the fire damper is closed, the edges of adjacent blades overlap and fit each other to reduce the gap between adjacent blades and reduce the air leakage rate, which is especially suitable for fire dampers with a large number of blades.

[0015] In a feasible solution, the connecting piece includes: a rotating arm and a fixing piece;

[0016] One end of the rotating arm is connected to the connecting rod;

[0017] There are two fixing plates, which are arranged at the other end of the rotating arm at intervals, and the fixing plates are arranged perpendicular to the rotating arm for connection with the blades.

[0018] In a feasible solution, the rotating arm is in a bent Z shape;

[0019] The inner wall of the shell is provided with a first limiting block for abutting against the connecting rod to limit the rotation of the rotating arm.

[0020] In a feasible solution, a second limiting block is provided on the inner wall of the shell for abutting against the blade.

[0021] In a feasible solution, the first limiting block is a square tube, and the second limiting block is L-shaped.

[0022] In a feasible solution, the blade is provided with arc-shaped reinforcing ribs;

[0023] The rotating arm is provided with an arc-shaped groove between the two fixing plates for the arc-shaped reinforcing rib to be embedded.

[0024] In a feasible solution, it also includes: a fixed pressure plate;

[0025] The fixed pressing plate is provided with an arc-shaped groove;

[0026] The fixed pressure plate is arranged on the blade through a fixing bolt and a locking nut, and the rotating shaft is clamped between the arc groove and the arc reinforcing rib.

[0027] In a feasible solution, the shell is provided with protruding edges around its periphery, the protruding edges are provided with fixing through holes, and the protruding edges are used for fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 It is a schematic diagram of a blade-linked fire damper in an embodiment of the utility model;

[0030] Figure 2 In the embodiment of the utility model Figure 1 A partial enlarged view of the

[0031] Figure 3 It is a partial schematic diagram of the fire damper in the embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the blades in the embodiment of the utility model in the rotational opening state;

[0033] Figure 5 It is a schematic diagram of the linkage mechanism in the embodiment of the utility model.

[0034] Numbers in the figure:

[0035] 1. Shell; 11. First limit block; 12. Second limit block; 13. Protruding edge; 2. Blade; 21. Rotating shaft; 22. Arc-shaped reinforcing rib; 3. Linkage mechanism; 31. Connecting rod; 32. Connecting plate; 321. Rotating arm; 322. Fixed plate; 323. Long hole; 4. Handle; 5. Actuator; 6. Fixed pressure plate; 71. Fixed bolt; 72. Locking nut. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0040] As described in the background technology of this application, fire dampers are installed on the supply and return air ducts of ventilation or air conditioning systems, and are usually open to achieve ventilation effects. In the event of a fire, when the gas temperature in the duct reaches 70°C (fusing temperature), the fusible link of the fire damper actuator melts, causing the fire damper to automatically close, which can meet the requirements of fire resistance stability and fire resistance integrity within a certain period of time, and play a role in isolating smoke and preventing fire.

[0041] The inventor of the present application has found that the current fire damper is inconvenient to adjust the rotation of the blades, and the gaps between the blades are relatively large.

[0042] In order to solve the above problems, the inventor of the present application proposed the technical solution of the present application, and the specific embodiments are as follows:

[0043] Figure 1 Schematic diagram of a blade-linked fire damper in an embodiment of the utility model, Figure 2 In the embodiment of the utility model Figure 1 A partial enlarged view of Figure 3 It is a partial schematic diagram of the fire damper in the embodiment of the utility model. Figure 4 This is a schematic diagram of the rotating opening state of the blades in the embodiment of the utility model. Figure 5 It is a schematic diagram of the linkage mechanism in the embodiment of the utility model.

[0044] like Figures 1 to 5 As shown, the blade-linked fire damper of this embodiment includes: a housing 1, a blade 2, a linkage mechanism 3, a handle 4 and an actuator 5.

[0045] The housing 1 is in the shape of a rectangular block as a whole.

[0046] There are multiple blades 2 , and both sides of the multiple blades 2 are rotatably arranged on the housing 1 through the rotating shafts 21 respectively, and are located in the rectangular frame of the housing 1 , and the rotating shaft 21 of one of the blades 2 extends out of the housing 1 .

[0047] The linkage mechanism 3 includes a connecting rod 31 and a connecting piece 32 .

[0048] There are multiple connecting pieces 32, which are arranged on the connecting rod 31 at equal intervals. One end of the connecting piece 32 is hinged on the connecting rod 31 and is rotatably connected to the connecting rod 31. The other ends of the multiple connecting pieces 32 are fixedly connected to the multiple blades 2 respectively.

[0049] A plurality of blades 2 are arranged on the housing 1 via a rotating shaft 21, and a handle 4 is connected to the rotating shaft 21 extending out of the housing 1. When the handle 4 is turned, the handle 4 drives the rotating shaft 21 to rotate, and the rotating shaft 21 drives the blades 2 to rotate when rotating, and the plurality of blades 2 are rotated together at the same time through the linkage mechanism 3, so that the housing 1 (fire damper) is in an open or closed state, and the opening angle of the blades 2 can be adjusted through the handle 4 to adjust the ventilation volume.

[0050] The actuator 5 is arranged on the outer side wall of the housing 1 and connected to the rotating shaft 21 extending out of the housing 1. When the environment (ventilation duct) where the fire damper is located reaches the melting temperature, the temperature fuse of the actuator 5 melts, and the actuator 5 drives the rotating shaft 21 to rotate. When the rotating shaft 21 rotates, it drives the multiple blades 2 to rotate together, so that the fire damper is closed.

[0051] When the fire damper is closed, the edges of two adjacent blades 2 overlap and fit together to reduce the gap between the adjacent blades 2 and reduce the air leakage rate.

[0052] In this embodiment, the fire damper has two blades, and the corresponding connecting pieces of the linkage mechanism are also two. When the number of the fire damper blades is large, and the number of the corresponding connecting pieces is also large, it is more convenient to adjust the fire damper blades, and the fire damper has better sealing performance.

[0053] It is not difficult to find from the above content that the blade linkage fire damper of this embodiment is provided with a housing, blades, linkage mechanism, handle and actuator, the actuator is provided on the housing, the linkage mechanism includes: a connecting rod and a connecting piece, a plurality of connecting pieces are provided on the connecting rod at equal intervals, and the connecting pieces are respectively connected to the blades, a plurality of blades are rotatably provided on the housing through a rotating shaft, one of the rotating shafts extends out of the housing, connected to the handle and the actuator, and when the fire damper is closed, two adjacent blades overlap each other. The blade linkage fire damper of this embodiment has a blade provided on the housing through a rotating shaft, a plurality of blades are connected through a linkage mechanism, one of the rotating shafts extends out of the housing, connected to the handle and the actuator. The handle is turned to drive the shaft to rotate, and the shaft drives the blades to rotate when rotating, and the linkage mechanism makes multiple blades rotate at the same time, so that the fire damper is in an open or closed state, and the opening angle of the blades can be adjusted through the handle to facilitate the adjustment of ventilation volume; when the fuse temperature is reached, the actuator drives the shaft to rotate, and makes multiple blades rotate together to close the fire damper to block smoke and fire; when the fire damper is closed, the edges of adjacent blades overlap and fit each other to reduce the gap between adjacent blades and reduce the air leakage rate, which is especially suitable for fire dampers with a large number of blades.

[0054] Optional, such as Figure 3 , Figure 5 As shown, in the blade-linked fire damper of this embodiment, the connecting piece 32 includes: a rotating arm 321 and a fixing piece 322 .

[0055] The connecting piece 32 is an integral piece, and one end of a rotating arm 321 of the connecting piece 32 is hinged on the connecting rod 31 , so that the rotating arm 321 is rotatably connected to the connecting rod 31 .

[0056] There are two fixing plates 322 . The two fixing plates 322 are spaced apart and arranged at the other end of the rotating arm 321 . The fixing plates 322 are arranged perpendicular to the rotating arm 321 .

[0057] The connecting piece 32 is provided with an elongated hole 323 on the fixing piece 322 so that the fixing piece 322 is connected and fixed to the blade 2 by bolts and nuts.

[0058] Furthermore, in the blade-linked fire damper of this embodiment, the rotating arm 321 of the connecting piece 32 is in a bent Z-shape.

[0059] The housing 1 is provided with a first limit block 11 on the opposite inner side wall. The first limit block 11 is used to abut against the connecting rod 31 to limit the rotation of the rotating arm 321 , that is, to limit the rotation of the blade 2 .

[0060] In this embodiment, the handle drives the blade to rotate through the rotating shaft. When the fire damper is closed (the blade is parallel to the outer side of the shell), the connecting rod abuts against the first limit block of the shell, and the first limit block blocks the connecting rod, so that the rotating arm (blade) stops rotating; when the fire damper is fully opened (the blade is perpendicular to the outer side of the shell), the connecting rod abuts against the first limit block of the shell again after rotating a certain angle, so that the rotating arm (blade) stops rotating, and the fire damper maintains the maximum ventilation volume.

[0061] Furthermore, in the blade-linked fire damper of the present embodiment, the shell 1 is provided with a second limit block 12 on the other opposite inner side wall. When the fire damper is closed, the outermost blade 2 fits against the second limit block 12 of the shell 1, thereby reducing the gap between the blade 2 and the shell 1, making the fire damper more sealed and reducing the air leakage rate.

[0062] Furthermore, in the blade-linked fire damper of the present embodiment, the first limit block 11 of the housing 1 is a square tube to reduce the weight of the housing 1 .

[0063] The second limit block 12 of the shell 1 is in a right-angled L-shape, one side plate of the second limit block 12 is fixed to the inner wall of the shell 1, and the other side plate is used to fit and abut against the blade 2, which reduces the weight of the shell and facilitates the fixing of the second limit block.

[0064] Furthermore, in the blade-linked fire damper of this embodiment, the blade 2 is provided with a plurality of arc-shaped reinforcing ribs 22 at intervals along the length direction.

[0065] The rotating arm 321 is provided with an arc groove 324 between the two fixing pieces 322 .

[0066] When the connecting piece 32 is connected to the blade 2, the arc-shaped reinforcing rib 22 in the middle of the blade 2 is embedded in the arc groove 324 of the rotating arm 321, and then the fixing piece 322 is fixedly connected to the blade 2, which facilitates the connection and fixation of the connecting piece and the blade.

[0067] Further, such as Figure 3 , Figure 4 As shown, the blade-linked fire damper in this embodiment further includes: a fixed pressure plate 6.

[0068] The fixed pressing plate 6 is rectangular in shape, and an arc groove is provided in the middle of the fixed pressing plate 6 .

[0069] The fixed pressure plate 6 is set on the blade 2 by means of fixing bolts 71 and locking nuts 72. The rotating shaft 21 is clamped between the arc groove of the fixed pressure plate 6 and the arc-shaped reinforcing rib 22 of the blade 2. When fixed, the fixed pressure plate 6 presses and fixes the rotating shaft 21 on the blade 2, so that the rotating shaft 21 drives the blade 2 to rotate together when rotating; and the fixed sheet 322 and the fixed pressure plate 6 are also connected together by fixing bolts 71 and locking nuts 72.

[0070] Furthermore, in the blade-linked fire damper of the present embodiment, a protruding edge 13 is provided around one side of the housing 1, and a plurality of fixing through holes are provided at intervals on the protruding edge 13.

[0071] In this embodiment, the protruding edge of the shell forms a flange portion of the fire damper, which facilitates the installation and fixation of the fire damper.

[0072] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0073] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A blade-linked fire damper, characterized in that: include: Housing, blades, linkage, handle and actuator; The housing is in a rectangular frame shape; The actuator is arranged on the housing; The blades are provided in plurality; The linkage mechanism comprises: a connecting rod and a connecting piece; The connecting pieces are provided in plurality, and the connecting pieces are arranged on the connecting rod at equal intervals, and are rotatably connected to the connecting rod, and the connecting pieces are respectively fixedly connected to the blades; The plurality of blades are rotatably arranged on the housing through shafts, and one of the shafts extends out of the housing and is connected to the handle and the actuator. The handle is used to drive the blades to rotate, and the actuator is used to drive the blades to rotate when the fusing temperature is reached to close the fire damper. When the fire damper is closed, two adjacent blades overlap each other.

2. The blade-linked fire damper according to claim 1, characterized in that: The connecting piece includes: a rotating arm and a fixing piece; One end of the rotating arm is connected to the connecting rod; There are two fixing plates, which are arranged at the other end of the rotating arm at intervals, and the fixing plates are arranged perpendicular to the rotating arm for connection with the blades.

3. The blade-linked fire damper according to claim 2, characterized in that: The rotating arm is in a bent Z shape; The inner wall of the shell is provided with a first limiting block for abutting against the connecting rod to limit the rotation of the rotating arm.

4. The blade-linked fire damper according to claim 3, characterized in that: The inner wall of the shell is provided with a second limiting block for abutting against the blade.

5. The blade-linked fire damper according to claim 4, characterized in that: The first limiting block is a square tube, and the second limiting block is L-shaped.

6. The blade-linked fire damper according to claim 2, characterized in that: The blades are provided with arc-shaped reinforcing ribs; The rotating arm is provided with an arc-shaped groove between the two fixing plates for the arc-shaped reinforcing rib to be embedded.

7. The blade-linked fire damper according to claim 6, characterized in that: Also included: a fixed pressure plate; The fixed pressing plate is provided with an arc-shaped groove; The fixed pressure plate is arranged on the blade through a fixing bolt and a locking nut, and the rotating shaft is clamped between the arc groove and the arc reinforcing rib.

8. The blade-linked fire damper according to any one of claims 1 to 7, characterized in that: The shell is provided with protruding edges around its periphery, the protruding edges are provided with fixing through holes, and the protruding edges are used for fixing.

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