Ventilation sealing valve

Abstract

The utility model relates to the technical field of valves, and discloses a ventilation closed valve. The ventilation sealing valve comprises a shell, blades and sealing strips, the multiple blades are arranged on the shell and connected through a connecting rod mechanism, the sealing strips are arranged on the two sides of the blades and comprise the flexible sealing strips and the hard sealing strips, the blade on the outermost side is provided with the flexible sealing strip, and the blade on the outermost side is provided with the hard sealing strips. A flexible sealing strip and a hard sealing strip are arranged on the side edges of every two adjacent blades respectively. According to the ventilation sealing valve, when the ventilation sealing valve is closed, the flexible sealing strip on the blade located on the outermost side is in contact with and abuts against the upper inner wall and the lower inner wall of the shell, and meanwhile the flexible sealing strips on the two adjacent blades are in contact with and abut against the hard sealing strips, so that sealing between the blades and the shell and sealing between the two adjacent blades are better; the overall sealing performance of the ventilation sealing valve is improved, the sealing performance of the ventilation sealing valve is enhanced, and the air leakage rate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a ventilation and airtight valve. Background Technology

[0002] Ventilation shut-off valves are installed on the supply and return air ducts of ventilation or air conditioning systems. Normally, the blades of the ventilation shut-off valve are in the open state, allowing indoor ventilation. When the blades of the ventilation shut-off valve are closed, the connection between the indoor and outdoor environments is blocked, preventing harmful gases from the outside from entering the room.

[0003] Publication number CN222577431U discloses a blade-type fire damper, comprising: a housing, blades, a linkage mechanism, a handle, and an actuator. The blades are mounted on the housing via a rotating shaft and connected by the linkage mechanism. The rotating shaft extends out of the housing and connects to the handle and the actuator. The handle drives multiple blades to rotate simultaneously via the rotating shaft, putting the fire damper into an open or closed state and facilitating ventilation adjustment. When the melting temperature is reached, the actuator drives multiple blades to rotate together via the rotating shaft, closing the fire damper. When the fire damper is closed, the edges of adjacent blades overlap and fit together to reduce the gap between adjacent blades and reduce air leakage. This blade-type fire damper, when the actuator is not installed, functions as a ventilation valve and can be used as a ventilation-sealed valve.

[0004] The inventors of this application have discovered that when current ventilation and airtight valves are closed, the gaps between adjacent blades are reduced by overlapping and fitting together, resulting in poor sealing performance. Furthermore, the seal between the blades and the housing is also poor, leading to a high air leakage rate in the ventilation and airtight valves. Utility Model Content

[0005] The purpose of this invention is to provide a ventilation and airtight valve to solve the problems mentioned in the background art.

[0006] This utility model provides a ventilation and airtight valve, including: a housing, blades, and a sealing strip;

[0007] The shell is rectangular frame shaped;

[0008] The blades are provided in multiple ways, and the multiple blades are rotatably mounted on the housing and connected to each other by a linkage mechanism;

[0009] The sealing strips are provided on both sides of the blade;

[0010] The sealing strip includes: a flexible sealing strip and a rigid sealing strip;

[0011] The outermost blade is provided with the flexible sealing strip for abutting against the housing;

[0012] The flexible sealing strip and the rigid sealing strip are respectively provided on the side of the two adjacent blades. When the ventilation and airtight valve is closed, the flexible sealing strip on the adjacent blades comes into contact with the rigid sealing strip and abuts against it, so that the housing is sealed.

[0013] Based on the above solution, the ventilation-sealed valve of this utility model, by setting a shell, blades, and sealing strips, has multiple blades rotatably mounted on the shell and connected by a linkage mechanism. Sealing strips are provided on both sides of the blades, including flexible sealing strips and rigid sealing strips. The outermost blade has a flexible sealing strip, and the sides of two adjacent blades each have a flexible sealing strip and a rigid sealing strip, respectively. When the ventilation-sealed valve is closed, the flexible sealing strip on the outermost blade contacts and abuts against the upper and lower inner walls of the shell. Simultaneously, the flexible sealing strips on two adjacent blades abut against and fit against the rigid sealing strips, resulting in better sealing between the blades and the shell, and between two adjacent blades. This improves the overall sealing performance of the shell (ventilation-sealed valve), enhances the sealing performance of the ventilation-sealed valve, and reduces the air leakage rate. It is particularly suitable for indoor ventilation systems in hospitals, chemical plants, and other places with high requirements for air leakage rates. When closed, the ventilation-sealed valve can effectively prevent harmful gases from entering the room.

[0014] In one feasible solution, the blade includes: a blade body and a fixing plate;

[0015] The fixing plate is located on the side of the blade body and is used to fix the sealing strip.

[0016] In one feasible solution, the blade body is provided with a first arcuate portion;

[0017] The fixed pressure plate includes: a connecting plate and a second arc-shaped portion;

[0018] The connecting plate is fixed to the blade body, and the first arc-shaped portion and the second arc-shaped portion form a ring with a notched groove for clamping the sealing strip.

[0019] In one feasible solution, the sealing strip includes: a cross-section, a fixing part, and a connecting part;

[0020] The cross-section is connected to the fixing part through the connecting part, and the cross-section is provided with a cavity;

[0021] The connecting part is engaged in the notch groove, so that the sealing strip is fixed on the blade.

[0022] In one feasible solution, the fixing part of the flexible sealing strip is in the shape of a straight line;

[0023] The fixing part of the rigid sealing strip is in the shape of an "8".

[0024] In one feasible solution, the fixing portion of the flexible sealing strip is provided with a V-shaped notch.

[0025] In one feasible solution, the connecting plate is riveted to the blade body by means of rivets.

[0026] In one feasible solution, the flexible sealing strip is made of rubber, and the rigid sealing strip is made of aluminum alloy.

[0027] In one feasible solution, the inner wall of the housing is provided with a baffle for resisting the flexible sealing strip.

[0028] In one feasible solution, the housing is provided with protruding edges around its perimeter, and the protruding edges are provided with fixing through holes. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a front view schematic diagram of the ventilation and airtight valve in an embodiment of this utility model;

[0031] Figure 2 As described in the embodiments of this utility model Figure 1 A magnified view of a portion of the image;

[0032] Figure 3 This is a side view of the ventilation and airtight valve in an embodiment of the present utility model;

[0033] Figure 4 As described in the embodiments of this utility model Figure 3 A magnified view of a portion of the image;

[0034] Figure 5 This is a schematic diagram of the blade in an embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of the installation of the sealing strip in an embodiment of the present utility model;

[0036] Figure 7 As described in the embodiments of this utility model Figure 6 Enlarged view of point A in the image.

[0037] Numbering on the map:

[0038] 1. Housing; 11. Baffle; 12. Protruding edge; 2. Blade; 21. Blade body; 211. First arc-shaped part; 22. Fixing pressure plate; 221. Connecting plate; 222. Second arc-shaped part; 23. Notch; 24. Rivet; 31. Flexible sealing strip; 311. First cross-section; 312. First fixing part; 313. First connecting part; 314. V-shaped notch; 32. Hard sealing strip; 321. Second cross-section; 322. Second fixing part; 323. Second connecting part; 4. Rotating shaft; 51. Handle; 52. Electric mechanism. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0043] As described in the background section of this application, the ventilation shut-off valve is installed on the supply and return air ducts of the ventilation or air conditioning system. Normally, the blades of the ventilation shut-off valve are in the open state, and the ventilation shut-off valve is open to achieve the indoor ventilation effect. When the blades of the ventilation shut-off valve are closed, the connection between the indoor and the outside is blocked, preventing harmful gases from the outside from entering the indoor environment.

[0044] The inventors of this application have discovered that when current fire dampers are closed, gaps exist between the blades and the housing, as well as between adjacent blades, resulting in poor sealing and a high air leakage rate.

[0045] To address the aforementioned problems, the inventors of this application have proposed a technical solution, the specific embodiments of which are as follows:

[0046] Figure 1 This is a front view schematic diagram of the ventilation and airtight valve in an embodiment of this utility model. Figure 2 As described in the embodiments of this utility model Figure 1 A magnified view of a portion of the image. Figure 3 This is a side view schematic diagram of the ventilation and airtight valve in an embodiment of this utility model. Figure 4 As described in the embodiments of this utility model Figure 3 A magnified view of a portion of the image. Figure 5 This is a schematic diagram of the blade in an embodiment of the present invention. Figure 6 This is a schematic diagram illustrating the installation of the sealing strip in an embodiment of this utility model. Figure 7 As described in the embodiments of this utility model Figure 6 Enlarged view of point A in the image.

[0047] like Figures 1 to 7 As shown, the ventilation and airtight valve of this embodiment includes: a housing 1, a blade 2, and a sealing strip.

[0048] The shell 1 is a rectangular cuboid with a rectangular frame.

[0049] Multiple blades 2 are provided, each blade 2 being rotatably mounted on the housing 1 via a rotating shaft 4 on both sides. The multiple blades 2 are arranged sequentially from top to bottom within the frame of the housing 1, and are connected by a linkage mechanism, allowing them to rotate simultaneously. The rotation of the blades 2 causes the housing 1 (ventilation and sealing valve) to be in an open or closed state. The blades 2 are connected to a handle 51 and an electric mechanism 52 via the rotating shaft 4. The opening angle of the blades 2 can be adjusted via the handle 51 and / or the electric mechanism 52 to regulate the ventilation volume of the valve or to close the valve.

[0050] Sealing strips are provided on both sides of the blade 2 along its length.

[0051] There are two types of sealing strips: flexible sealing strip 31 and rigid sealing strip 32.

[0052] A flexible sealing strip 31 is provided on one side of the blade 2 located on the outermost side and close to the upper and lower inner walls of the housing 1. When the ventilation sealing valve (blade) is closed, the outermost flexible sealing strip 31 contacts and abuts against the upper and lower inner walls of the housing 1, making the blade 2 and the housing 1 more sealed.

[0053] Flexible sealing strip 31 and rigid sealing strip 32 are respectively provided on the sides of two adjacent blades 2. When the ventilation shut-off valve (blade) is closed, the flexible sealing strip 31 and rigid sealing strip 32 on the two adjacent blades 2 abut against each other, so that there is no gap between the adjacent blades 2 and the contact point between the two adjacent blades 2 is sealed, thereby making the housing 1 completely sealed to enhance the sealing performance of the ventilation shut-off valve.

[0054] As can be seen from the above, the ventilation-sealed valve of this embodiment, by setting a shell, blades, and sealing strips, has multiple blades rotatably mounted on the shell and connected by a linkage mechanism. Sealing strips are provided on both sides of the blades, including flexible and rigid sealing strips. The outermost blade has a flexible sealing strip, and the sides of two adjacent blades each have a flexible and a rigid sealing strip, respectively. In this embodiment, when the ventilation-sealed valve is closed, the flexible sealing strip on the outermost blade contacts and abuts against the upper and lower inner walls of the shell. Simultaneously, the flexible and rigid sealing strips on adjacent blades abut against and fit together, resulting in better sealing between the blades and the shell, and between adjacent blades. This improves the overall sealing performance of the shell (ventilation-sealed valve), enhances its sealing performance, and reduces air leakage. It is particularly suitable for indoor ventilation systems in hospitals, chemical plants, and other places with high requirements for low air leakage. When closed, the ventilation-sealed valve effectively prevents harmful gases from entering the room.

[0055] Optional, such as Figure 5 and Figure 7 As shown, in this embodiment, the ventilation and airtight valve blade 2 includes: blade body 21 and fixed pressure plate 22.

[0056] Two fixing plates 22 are provided. The fixing plates 22 are set on the blade body 21. The two fixing plates 22 are located on the two sides of the blade body 21 respectively. The fixing plates 22 cooperate with the blade body 21 to fix and clamp the sealing strip.

[0057] Furthermore, in this embodiment, the ventilation and airtight valve has a first arc-shaped portion 211 on both sides of the blade body 21.

[0058] The fixed pressure plate 22 includes: a connecting plate 221 and a second arc-shaped portion 222.

[0059] The connecting plate 221 of the fixed pressure plate 22 is connected to the blade body 21. The second arc-shaped part 222 of the fixed pressure plate 22 and the first arc-shaped part 211 of the blade body 21 are spliced ​​on both sides of the blade 2 to form a ring with a notch 23, which is used to clamp and fix the sealing strip.

[0060] Furthermore, such as Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment, the flexible sealing strip 31 and the rigid sealing strip 32 of the ventilation sealing valve have similar structures and are both symmetrical.

[0061] The flexible sealing strip 31 includes a first section 311, a first fixing part 312, and a first connecting part 313, wherein the first section 311 and the first fixing part 312 are connected by the first connecting part 313.

[0062] The rigid sealing strip 32 includes a second section 321, a second fixing part 322, and a second connecting part 323, wherein the second section 321 and the second fixing part 322 are connected by the second connecting part 323.

[0063] The first cross-section 311 and the second cross-section 321 are tubular annular structures with cavities.

[0064] In this embodiment, during installation, the connecting part of the flexible sealing strip 31 and the rigid sealing strip 32 is engaged in the notch 23 between the second arc-shaped part 222 of the fixing plate 22 and the first arc-shaped part 211 of the blade body 21, and the fixing part of the sealing strip is located within the ring formed by the first arc-shaped part and the second arc-shaped part, thus completing the installation and fixing of the sealing strip on the blade and facilitating the replacement and disassembly of the sealing strip.

[0065] like Figure 4 and Figure 7 As shown, when the ventilation sealing valve is closed, the cross-section of the flexible sealing strip on the outermost blade abuts against the inner wall of the housing; at the same time, the cross-sections of the flexible sealing strip and the rigid sealing strip on the adjacent blades contact and abut against each other, and through the contraction and deformation of the cross-section of the flexible sealing strip, the cross-section of the rigid sealing strip overlaps and presses against the cross-section of the flexible sealing strip, thereby making the adjacent blades more airtight.

[0066] Furthermore, in this embodiment, the fixing part 312 of the flexible sealing strip 31 of the ventilation sealing valve is in the shape of a straight line.

[0067] The fixing part 322 of the rigid sealing strip 32 is in the shape of a trumpet or figure eight.

[0068] In this embodiment, when the flexible sealing strip is installed, its elasticity allows the fixing part to adhere to the inner wall of the first arc-shaped part of the blade body and the second arc-shaped part of the fixing plate, making the flexible sealing strip more stable; the fixing part of the rigid sealing strip is flared and V-shaped, so that its connecting part is stuck in the notch groove of the blade.

[0069] Furthermore, in this embodiment, the flexible sealing strip 31 of the ventilation sealing valve has a V-shaped notch 314 at the bottom of the fixing part 312, which facilitates bending and deformation of the fixing part during installation.

[0070] Furthermore, in this embodiment, the connecting plate 221 of the fixed pressure plate 22 of the ventilation sealing valve is riveted and fixed to the blade body 21 by rivets 24.

[0071] Optionally, in this embodiment, the flexible sealing strip 31 of the ventilation and airtight valve is a rubber sealing strip, and its material is rubber.

[0072] The rigid sealing strip 32 is an aluminum alloy sealing strip, and its material is aluminum alloy.

[0073] Optionally, in this embodiment, the ventilation and airtight valve has a baffle 11 on the inner wall of the housing 1. When the ventilation and airtight valve is closed, the baffle 11 abuts against the cross-section 311 of the flexible sealing strip 31 of the outermost blade, making the blade 2 and the housing 1 more airtight.

[0074] Furthermore, in this embodiment, the ventilation and sealing valve has protruding edges 12 around its housing 1, and multiple fixing through holes are spaced apart on the protruding edges 12.

[0075] The protruding edge 12 of the housing 1 forms the flange of the ventilation and airtight valve, which facilitates the installation and fixing of the ventilation and airtight valve.

[0076] In this utility model, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium.

[0077] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0078] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ventilation-sealing valve, characterized in that, include: Housing, blades, and sealing strips; The shell is rectangular frame shaped; The blades are provided in multiple ways, and the multiple blades are rotatably mounted on the housing and connected to each other by a linkage mechanism; The sealing strips are provided on both sides of the blade; The sealing strip includes: a flexible sealing strip and a rigid sealing strip; The outermost blade is provided with the flexible sealing strip for abutting against the housing; The flexible sealing strip and the rigid sealing strip are respectively provided on the side of the two adjacent blades. When the ventilation and airtight valve is closed, the flexible sealing strip on the adjacent blades comes into contact with the rigid sealing strip and abuts against it, so that the housing is sealed.

2. The ventilation and airtight valve according to claim 1, characterized in that, The blade includes: a blade body and a fixing plate; The fixing plate is located on the side of the blade body and is used to fix the sealing strip.

3. The ventilation and airtight valve according to claim 2, characterized in that, The blade body is provided with a first arc-shaped portion; The fixed pressure plate includes: a connecting plate and a second arc-shaped portion; The connecting plate is fixed to the blade body, and the first arc-shaped portion and the second arc-shaped portion form a ring with a notched groove for clamping the sealing strip.

4. The ventilation and airtight valve according to claim 3, characterized in that, The sealing strip includes: a cross-section, a fixing part, and a connecting part; The cross-section is connected to the fixing part through the connecting part, and the cross-section is provided with a cavity; The connecting part is engaged in the notch groove, so that the sealing strip is fixed on the blade.

5. The ventilation and airtight valve according to claim 4, characterized in that, The fixing part of the flexible sealing strip is in the shape of a straight line; The fixing part of the rigid sealing strip is in the shape of an "8".

6. The ventilation and airtight valve according to claim 5, characterized in that, The fixing part of the flexible sealing strip is provided with a V-shaped notch.

7. The ventilation and airtight valve according to claim 3, characterized in that, The connecting plate is riveted to the blade body by rivets.

8. The ventilation and airtight valve according to claim 1, characterized in that, The flexible sealing strip is made of rubber, and the rigid sealing strip is made of aluminum alloy.

9. The ventilation and airtight valve according to claim 1, characterized in that, The inner wall of the housing is provided with a baffle for resisting the flexible sealing strip.

10. The ventilation-sealing valve according to any one of claims 1 to 9, characterized in that, The shell has protruding edges around its perimeter, and each protruding edge has a fixing through hole.

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