exhaust valve

Abstract

The present application relates to a kind of exhaust valves, to further improve the exhaust efficiency of exhaust valve.Exhaust valve includes: valve body, first gas flow channel is equipped on the valve body, and inlet is equipped on the first gas flow channel;Annular panel, the annular panel is equipped on the valve body, second gas flow channel is equipped on the annular panel, the second gas flow channel is communicated with the first gas flow channel, and the second gas flow channel includes at least one valve port;At least two valve sheets, each valve sheet is movably arranged on the annular panel and / or the valve body;Wherein, at least two valve sheets are used to open or close one of the valve port, when at least two valve sheets close one of the valve port, adjacent valve sheet interference fit or adjacent valve sheet is at least partially stacked.

Description

Technical Field

[0001] This invention relates to an exhaust valve. Background Technology

[0002] The existing residential building has a flue with an exhaust valve. A range hood is installed inside the apartment, and the range hood is fixedly connected to the exhaust valve via a plastic pipe. The range hood discharges cooking fumes into the exhaust duct of the exhaust valve through the plastic pipe. The exhaust valve consists of a valve body and two exhaust valve plates. The valve body has an exhaust duct with two exhaust ports. Each exhaust valve plate is hinged to the valve body, and one exhaust valve plate closes one exhaust port. The valve body uses a support column to separate the exhaust duct into two exhaust ports, through which the cooking fumes are discharged back into the flue. However, the support column occupies the exhaust space of the exhaust duct, which reduces the exhaust efficiency of the exhaust valve. Summary of the Invention

[0003] The problem to be solved by the present invention is to provide an exhaust valve to further improve the exhaust efficiency of the exhaust valve.

[0004] To address the above problems, the present invention provides the following technical solution:

[0005] The exhaust valve includes:

[0006] A valve body, wherein a first gas flow channel is provided on the valve body, and an air inlet is provided on the first gas flow channel;

[0007] An annular panel is disposed on the valve body, and a second gas flow channel is provided on the annular panel. The second gas flow channel is connected to the first gas flow channel, and the second gas flow channel includes at least one valve port.

[0008] At least two valve plates, each valve plate being movably disposed on the annular panel and / or the valve body;

[0009] Among them, at least two valve plates are used to open or close one of the valve ports. When at least two valve plates close one of the valve ports, the adjacent valve plates are interference-fitted or the adjacent valve plates are at least partially stacked.

[0010] In this invention, the exhaust valve includes an annular panel and at least two valve plates. A second gas flow channel is provided on the annular panel, and the second gas flow channel includes at least one valve port. Each valve plate is movably disposed on the annular panel and / or the valve body. When at least two valve plates close one valve port, adjacent valve plates are interference-fitted or at least partially stacked. This design, by eliminating the need for a support column, further improves the exhaust efficiency of the exhaust valve.

[0011] Furthermore, at least two valve plates include two smoke-proof valve plates, and at least one valve port is a smoke-proof port. Each smoke-proof valve plate is hinged to the annular panel. When the two smoke-proof valve plates close one of the smoke-proof ports, the projection of each smoke-proof valve plate on the vertical plane coincides with the center of the annular panel, thereby achieving an interference fit between adjacent smoke-proof valve plates or at least a partial stacking of adjacent valve plates. This design prevents smoke leakage from the smoke-proof ports.

[0012] Furthermore, the smoke-blocking valve includes a guide portion and a sealing portion. The guide portion is inclined, and when two smoke-blocking valves close one of the smoke-blocking openings, there is a gap between the guide portions of the two smoke-blocking valves, and the sealing portions of the two smoke-blocking valves abut against each other. When the guide portion is set to a predetermined length, its presence can effectively prevent the two smoke-blocking valves from abutting too early, thus preventing the smoke-blocking opening from being closed.

[0013] Furthermore, at least two valve plates include two smoke-proof valve plates, with at least one valve opening serving as a smoke-proof opening. Each smoke-proof valve plate is hinged to the annular panel. One smoke-proof valve plate includes a first step, and the other includes an abutment plate. The first step includes an upper platform stage and a first connecting section for connecting the upper platform stage. The upper platform stage is parallel to the abutment plate. When the two smoke-proof valve plates close one of the smoke-proof openings, the lower end face of the upper platform stage of one smoke-proof valve plate is at least partially in contact with the upper end face of the abutment plate of the other panel. Furthermore, the abutment plate of the other panel is at least partially inserted into the first connecting section of one of the smoke-proof valve plates, thus achieving a stacked arrangement of adjacent smoke-proof valve plates. This design prevents smoke leakage from the smoke-proof opening.

[0014] Furthermore, at least two valve plates include three smoke-proof valve plates, and at least one valve port includes a smoke-proof port. Each smoke-proof valve plate is hinged to the annular panel. When the three smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two smoke-proof valve plates on the vertical plane coincide with the center of the annular panel. Alternatively, at least two valve plates include four smoke-proof valve plates, and at least one valve port is a smoke-proof port. Each smoke-proof valve plate is hinged to the annular panel. When the four smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two smoke-proof valve plates on the vertical plane coincide with the center of the annular panel. Alternatively, at least two valve plates include five smoke-proof valve plates, and at least one valve port is a smoke-proof port. Each smoke-proof valve plate is hinged to the annular panel. When the five smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two smoke-proof valve plates on the vertical plane coincide with the center of the annular panel. The following configurations are provided: 1. Overlapping; or 2. At least two valve plates comprising six smoke-proof valve plates, at least one valve port being a smoke-proof port, each smoke-proof valve plate being hinged to the annular panel, such that when the six smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two smoke-proof valve plates on the vertical plane coincide with the center of the annular panel; 3. At least two valve plates comprising seven smoke-proof valve plates, at least one valve port being a smoke-proof port, each smoke-proof valve plate being hinged to the annular panel, such that when the seven smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two valve plates on the vertical plane coincide with the center of the annular panel; 4. At least two valve plates comprising eight smoke-proof valve plates, at least one valve port being a smoke-proof port, each smoke-proof valve plate being hinged to the annular panel, such that when the eight smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two smoke-proof valve plates on the vertical plane coincide with the center of the annular panel.

[0015] Furthermore, at least two valve plates include one smoke exhaust valve plate, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when one smoke exhaust valve plate closes one of the smoke exhaust ports, the projection of each smoke exhaust valve plate on the vertical plane coincides with the center of the annular panel; or, at least two valve plates include two smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when two smoke exhaust valve plates close one of the smoke exhaust ports, the projection of each smoke exhaust valve plate on the vertical plane coincides with the center of the annular panel; Alternatively, at least two valve plates include three smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the three smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel; or, at least two valve plates include four smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the four smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel; Alternatively, at least two valve plates include five smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the five smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel; or, at least two valve plates include six smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the six smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel; Alternatively, at least two valve plates include seven smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the seven smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel; or, at least two valve plates include eight smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the eight smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel.

[0016] Furthermore, the annular panel and / or the valve body are provided with mounting seats, and each valve piece is hinged to the mounting seat.

[0017] Furthermore, the mounting base is detachably mounted on the annular panel and / or the valve body. This design facilitates the replacement and cleaning of the valve plate.

[0018] Furthermore, the valve body has a mounting plate on its outer wall, and / or the valve body includes a second step, the second step including a second large-diameter section, a second small-diameter section, and a second connecting section for connecting the second large-diameter section and the second small-diameter section. The annular panel is located on the small-diameter section. When the valve body has a mounting plate on its outer wall and the valve body includes a second step, the mounting plate is located outside the second large-diameter section. The mounting plate is used to increase the contact area between the exhaust valve and the wall or flue, the second connecting section is used to install a sealing ring, and the second large-diameter section is used to control the depth to which the sealing ring is inserted into the valve body.

[0019] Furthermore, each valve plate includes a metal plate and a flexible ring, the flexible ring being disposed on the metal plate, such that when at least two valve plates close one of the valve ports, the flexible rings of adjacent valve plates are at least partially in contact with each other. The flexible ring increases the deformation range of the valve plates.

[0020] Furthermore, at least one valve port includes a smoke-blocking port and a smoke-exhausting port, and at least two valve plates include at least one smoke-blocking valve plate and at least one smoke-exhausting valve plate. At least one smoke-blocking valve plate is used to close the smoke-blocking port, and at least one smoke-exhausting valve plate is used to close the smoke-exhausting port. When at least one smoke-blocking valve plate closes the smoke-blocking port, and at least one smoke-exhausting valve plate closes the smoke-exhausting port, the smoke-blocking valve plate, the smoke-exhausting valve plate, and the annular panel form a smoke-blocking chamber. This design prevents oil fumes from passing through the smoke-blocking chamber. Attached Figure Description

[0021] Figure 1 This is a perspective view of the exhaust valve in a preferred embodiment of the present invention;

[0022] Figure 2 This is a front view of the exhaust valve in a preferred embodiment of the present invention;

[0023] Figure 3 for Figure 2 Sectional view at point AA;

[0024] Figure 4 for Figure 3 A magnified view of a section at point B. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0026] See Figure 2 , Figure 3 and Figure 4 The exhaust valve includes:

[0027] Valve body 1, the valve body 1 is provided with a first gas flow channel 11, the first gas flow channel 11 is provided with an air inlet 111;

[0028] An annular panel 9 is disposed on the valve body 1. A second gas flow channel 91 is provided on the annular panel 9. The second gas flow channel 91 is connected to the first gas flow channel 11. The second gas flow channel 91 includes at least one valve port.

[0029] At least two valve plates, each valve plate being movably disposed on the annular panel 9 and / or valve body 1;

[0030] Among them, at least two valve plates are used to open or close a valve port. When at least two valve plates close a valve port, adjacent valve plates are interference-fitted or adjacent valve plates are at least partially stacked.

[0031] It should be noted that in this embodiment, "each valve piece is movably disposed on the annular panel 9 and / or the valve body 1" means that each valve piece is movably disposed on the annular panel 9. In other embodiments of the present invention, each valve piece is movably disposed on the valve body 1; or, each valve piece is movably disposed on both the annular panel 9 and the valve body 1.

[0032] See Figure 2 , Figure 3 and Figure 4 The system comprises at least two valve plates, including two smoke-blocking valve plates 3, and at least one valve port, which is a smoke-blocking port 912. Each smoke-blocking valve plate 3 is hinged to an annular panel 9. When the two smoke-blocking valve plates 3 close one smoke-blocking port 912, the projection of each smoke-blocking valve plate 3 on the vertical plane coincides with the center of the annular panel 9. When the projection of each smoke-blocking valve plate 3 on the vertical plane coincides with the center of the annular panel 9, the area of ​​the smoke-blocking valve plate 3 is greater than half the area of ​​the smoke-blocking port 912. In other embodiments of the invention, the smoke-blocking valve plate is rotatably connected to one end of the first connecting rod, and the annular panel is rotatably connected to the other end of the first connecting rod. The smoke exhaust valve plate is rotatably connected to one end of the second connecting rod, and the annular panel is rotatably connected to the other end of the second connecting rod.

[0033] Preferably, the smoke isolation valve plate 3 includes a guide portion and a sealing portion. The guide portion is inclined. When the two smoke isolation valve plates 3 close one smoke isolation port 912, there is a gap between the guide portions of the two smoke isolation valve plates 3, and the sealing portions of the two smoke isolation valve plates 3 abut against each other.

[0034] In other embodiments of the present invention, adjacent valve plates are at least partially stacked. Specifically, at least two valve plates include two smoke-proof valve plates, at least one valve port is a smoke-proof port, each smoke-proof valve plate is hinged to an annular panel, one smoke-proof valve plate includes a first step, and the other smoke-proof valve plate includes an abutment plate. The first step includes an upper stage and a first connecting section for connecting the upper stage. The upper stage is parallel to the abutment plate. When the two smoke-proof valve plates close one smoke-proof port, the lower end face of the upper stage of one smoke-proof valve plate is at least partially abutted with the upper end face of the abutment plate of the other partition plate, and the abutment plate of the other partition plate is at least partially inserted into the first connecting section of one smoke-proof valve plate to achieve the stacking of adjacent smoke-proof valve plates.

[0035] In other embodiments of the present invention, at least two valve plates further include two or more smoke-proof valve plates. For example: at least two valve plates include three smoke-proof valve plates, at least one valve port includes a smoke-proof port, each smoke-proof valve plate is hinged to the annular panel, and when the three smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two smoke-proof valve plates on the vertical plane coincide with the center of the annular panel; or, at least two valve plates include four smoke-proof valve plates, at least one valve port is a smoke-proof port, each smoke-proof valve plate is hinged to the annular panel, and when the four smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two smoke-proof valve plates on the vertical plane coincide with the center of the annular panel; or, at least two valve plates include five smoke-proof valve plates, at least one valve port is a smoke-proof port, each smoke-proof valve plate is hinged to the annular panel, and when the five smoke-proof valve plates close one of the smoke-proof ports, the projections of at least two smoke-proof valve plates on the vertical plane coincide with the center of the annular panel; The projection on the surface coincides with the center of the annular panel; or, at least two valve plates include six smoke-proof valve plates, at least one valve port is a smoke-proof port, each smoke-proof valve plate is hinged to the annular panel, and when the six smoke-proof valve plates close one of the smoke-proof ports, the projection of at least two smoke-proof valve plates on the vertical plane coincides with the center of the annular panel; or, at least two valve plates include seven smoke-proof valve plates, at least one valve port is a smoke-proof port, each smoke-proof valve plate is hinged to the annular panel, and when the seven smoke-proof valve plates close one of the smoke-proof ports, the projection of at least two valve plates on the vertical plane coincides with the center of the annular panel; or, at least two valve plates include eight smoke-proof valve plates, at least one valve port is a smoke-proof port, each smoke-proof valve plate is hinged to the annular panel, and when the eight smoke-proof valve plates close one of the smoke-proof ports, the projection of at least two smoke-proof valve plates on the vertical plane coincides with the center of the annular panel.

[0036] In other embodiments of the present invention, at least two valve plates further include two or more smoke exhaust valve plates. For example, at least two valve plates include one smoke exhaust valve plate, at least one valve port includes a smoke exhaust port, and each smoke exhaust valve plate is hinged to the annular panel. When one smoke exhaust valve plate closes one of the smoke exhaust ports, the projection of each smoke exhaust valve plate on the vertical plane coincides with the center of the annular panel; or, at least two valve plates include two smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, and each smoke exhaust valve plate is hinged to the annular panel. When two smoke exhaust valve plates close one of the smoke exhaust ports, each smoke exhaust valve plate... The projection of the at least two smoke exhaust valves onto the vertical plane coincides with the center of the annular panel; or, at least two valve plates include three smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the three smoke exhaust valve plates close one of the smoke exhaust ports, the projection of the at least two smoke exhaust valve plates onto the vertical plane coincides with the center of the annular panel; or, at least two valve plates include four smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the four smoke exhaust valve plates close one of the smoke exhaust ports, the projection of the at least two smoke exhaust valve plates onto the vertical plane coincides with the center of the annular panel; The projection of the at least two smoke exhaust valves on the vertical plane coincides with the center of the annular panel; or, at least two valve plates include five smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the five smoke exhaust valve plates close one of the smoke exhaust ports, the projection of the at least two smoke exhaust valve plates on the vertical plane coincides with the center of the annular panel; or, at least two valve plates include six smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the six smoke exhaust valve plates close one of the smoke exhaust ports, the projection of the at least two smoke exhaust valve plates on the vertical plane coincides with the center of the annular panel. The centers of the panels coincide; or, at least two valve plates include seven smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the seven smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel; or, at least two valve plates include eight smoke exhaust valve plates, at least one valve port includes a smoke exhaust port, each smoke exhaust valve plate is hinged to the annular panel, and when the eight smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel.

[0037] See Figure 1 and Figure 2 The annular panel 9 and / or valve body 1 are provided with mounting seats. Each valve plate is hinged to the mounting seat. The mounting seats are detachably provided on the annular panel 9 and / or valve body 1. Specifically: the first mounting seat 7 is detachably provided on the annular panel 9 and / or valve body 1, and the smoke isolation valve plate 3 is movably provided on the first mounting seat 7; the second mounting seat 6 is detachably provided on the annular panel 9 and / or valve body 1, and the smoke exhaust valve plate 2 is movably provided on the second mounting seat 6.

[0038] Preferably, the second mounting base 6 is provided with a second bottom support plate 61. The smoke exhaust valve plate 2 is hinged to the second mounting base 6 via a second rotating shaft 4. The lower end face of the second rotating shaft 4 abuts against the second bottom support plate 61 under its own weight. The second rotating shaft 4 includes a second tapered section, and the lower end face of the second rotating shaft 4 is located at the position where the diameter of the second tapered section is smallest. This design reduces the rotational resistance of the second rotating shaft 4. Similarly, the first mounting base 7 is provided with a first bottom support plate. The smoke isolation valve plate 3 is hinged to the first mounting base 7 via a first rotating shaft 5. The lower end face of the first rotating shaft 5 abuts against the first bottom support plate under its own weight. The first rotating shaft 5 includes a first tapered section, and the lower end face of the first rotating shaft 5 is located at the position where the diameter of the first tapered section is smallest.

[0039] In this embodiment, the outer wall of the valve body 1 is provided with a mounting plate, and / or the valve body 1 includes a second step, the second step includes a second large diameter section, a second small diameter section and a second connecting section for connecting the second large diameter section and the second small diameter section, and an annular panel is provided on the small diameter section. When the outer wall of the valve body 1 is provided with a mounting plate and the valve body 1 includes a second step, the mounting plate is provided on the outside of the second large diameter section.

[0040] In this embodiment, each valve plate includes a metal plate and a flexible ring. The flexible ring is disposed on the metal plate. When at least two valve plates close a valve port, the flexible rings of adjacent valve plates are at least partially in contact with each other.

[0041] See Figure 3 and Figure 4 At least one valve port includes a smoke-proof port 912 and a smoke-exhaust port 911. At least two valve plates include at least one smoke-proof valve plate 3 and at least one smoke-exhaust valve plate 2. The number of smoke-proof valve plates 3 is different from the number of smoke-exhaust valve plates 2. At least one smoke-proof valve plate 3 is used to close the smoke-proof port 912, and at least one smoke-exhaust valve plate 2 is used to close the smoke-exhaust port 911. When at least one smoke-proof valve plate 3 closes the smoke-proof port 912 and at least one smoke-exhaust valve plate 2 closes the smoke-exhaust port 911, the smoke-proof valve plate 3, the smoke-exhaust valve plate 2, and the annular panel 9 form a smoke-proof cavity.

[0042] After the smoke-blocking valve plate 3 strikes the annular panel 9 and resonates with the smoke exhaust valve plate 2, the smoke exhaust valve plate 2 can open the smoke exhaust port 911 in an instant. When the smoke-blocking valve plate 3 strikes the annular panel 9 and rebounds, it opens the smoke-blocking port 912. When the smoke exhaust valve plate 2 opens the smoke exhaust port 911, the smoke can continuously pass through the smoke-blocking port 912, the smoke-blocking chamber and the smoke exhaust port 911 in sequence, which will cause the exhaust valve to fail to block the smoke.

[0043] When the number of smoke-blocking valve plates 3 differs from the number of smoke-exhaust valve plates 2, the force exerted by the smoke-blocking valve plates 3 on the annular panel 9 is different from the force exerted by the smoke-exhaust valve plates 2 on the annular panel 9. This design, by differentiating the force exerted by the smoke-blocking valve plates 3 on the annular panel 9 from the force exerted by the smoke-exhaust valve plates 2 on the annular panel 9, avoids resonance between the smoke-blocking valve plates 3 and the smoke-exhaust valve plates 2 when they collide, and also avoids resonance between the smoke-exhaust valve plates 2 and the smoke-blocking valve plates 3 when they collide.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. An exhaust valve, characterized in that... include: A valve body, wherein a first gas flow channel is provided on the valve body, and an air inlet is provided on the first gas flow channel; An annular panel is disposed on the valve body. A second gas flow channel is provided on the annular panel. The second gas flow channel is connected to the first gas flow channel. The second gas flow channel includes at least one valve port. The at least one valve port includes a smoke isolation port and a smoke exhaust port. At least two valve plates, each valve plate being movably disposed on the annular panel and / or the valve body; At least two valve plates include at least one smoke-proof valve plate and at least one smoke-exhaust valve plate, and the number of smoke-proof valve plates is different from the number of smoke-exhaust valve plates. At least one smoke-proof valve plate is used to close the smoke-proof port, and at least one smoke-exhaust valve plate is used to close the smoke-exhaust port. When at least one smoke-proof valve plate closes the smoke-proof port and at least one smoke-exhaust valve plate closes the smoke-exhaust port, the smoke-proof valve plate, the smoke-exhaust valve plate, and the annular panel form a smoke-proof cavity. Wherein, when the number of smoke-proof valve plates is different from the number of smoke-exhaust valve plates, the force of the smoke-proof valve plates hitting the annular panel is different from the force of the smoke-exhaust valve plates hitting the annular panel; at least two valve plates are used to open or close one of the valve ports, and when at least two valve plates close one of the valve ports, adjacent valve plates are interference-fitted or adjacent valve plates are at least partially stacked.

2. The exhaust valve as described in claim 1, characterized in that, At least one smoke barrier includes two smoke barrier plates, each of which is hinged to the annular panel. When the two smoke barrier plates close one of the smoke barriers, the projection of each smoke barrier plate on the vertical plane coincides with the center of the annular panel.

3. The exhaust valve as described in claim 1, characterized in that, At least one smoke barrier includes two smoke barrier plates, each of which is hinged to the annular panel. One smoke barrier plate includes a first step, and the other smoke barrier plate includes an abutment plate. The first step includes an upper stage and a first connecting section for connecting the upper stage. The upper stage is parallel to the abutment plate. When the two smoke barrier plates close one of the smoke barriers, the lower end face of the upper stage of one smoke barrier plate is at least partially in contact with the upper end face of the abutment plate of the other smoke barrier plate, and the abutment plate of the other smoke barrier plate is at least partially inserted into the first connecting section of one smoke barrier plate.

4. The exhaust valve as described in claim 1, characterized in that, At least one smoke barrier includes three smoke barrier plates, each hinged to the annular panel. When the three smoke barrier plates close one of the smoke-proof openings, the projections of at least two smoke barrier plates on the vertical plane coincide with the center of the annular panel; or, at least one smoke barrier includes four smoke barrier plates, each hinged to the annular panel. When the four smoke barrier plates close one of the smoke-proof openings, the projections of at least two smoke barrier plates on the vertical plane coincide with the center of the annular panel; or, at least one smoke barrier includes five smoke barrier plates, each hinged to the annular panel. When the five smoke barrier plates close one of the smoke-proof openings, the projections of at least two smoke barrier plates on the vertical plane coincide with the center of the annular panel; or At least one smoke barrier includes six smoke barrier plates, each hinged to the annular panel. When the six smoke barrier plates close one of the smoke-proof openings, the projections of at least two smoke barrier plates on the vertical plane coincide with the center of the annular panel. Alternatively, at least one smoke barrier includes seven smoke barrier plates, each hinged to the annular panel. When the seven smoke barrier plates close one of the smoke-proof openings, the projections of at least two smoke barrier plates on the vertical plane coincide with the center of the annular panel. Alternatively, at least one smoke barrier includes eight smoke barrier plates, each hinged to the annular panel. When the eight smoke barrier plates close one of the smoke-proof openings, the projections of at least two smoke barrier plates on the vertical plane coincide with the center of the annular panel.

5. The exhaust valve as described in claim 1, characterized in that, At least one smoke exhaust valve plate includes one smoke exhaust valve plate, each smoke exhaust valve plate being hinged to the annular panel. When one smoke exhaust valve plate closes one of the smoke exhaust ports, the projection of each smoke exhaust valve plate on the vertical plane coincides with the center of the annular panel; or, at least one smoke exhaust valve plate includes two smoke exhaust valve plates, each smoke exhaust valve plate being hinged to the annular panel. When both smoke exhaust valve plates close one of the smoke exhaust ports, the projection of each smoke exhaust valve plate on the vertical plane coincides with the center of the annular panel; or, at least A smoke exhaust valve includes three smoke exhaust valves, each hinged to the annular panel. When the three smoke exhaust valves close one of the smoke exhaust ports, the projections of at least two smoke exhaust valves on the vertical plane coincide with the center of the annular panel; or, at least one smoke exhaust valve includes four smoke exhaust valves, each hinged to the annular panel. When the four smoke exhaust valves close one of the smoke exhaust ports, the projections of at least two smoke exhaust valves on the vertical plane coincide with the center of the annular panel; or, to One of the smoke exhaust valve plates comprises five smoke exhaust valve plates, each hinged to the annular panel. When the five smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel; or, at least one smoke exhaust valve plate comprises six smoke exhaust valve plates, each hinged to the annular panel. When the six smoke exhaust valve plates close one of the smoke exhaust ports, the projections of at least two smoke exhaust valve plates on the vertical plane coincide with the center of the annular panel; or At least one smoke exhaust valve includes seven smoke exhaust valves, each of which is hinged to the annular panel. When the seven smoke exhaust valves close one of the smoke exhaust ports, the projections of at least two smoke exhaust valves on the vertical plane coincide with the center of the annular panel. Alternatively, at least one smoke exhaust valve includes eight smoke exhaust valves, each of which is hinged to the annular panel. When the eight smoke exhaust valves close one of the smoke exhaust ports, the projections of at least two smoke exhaust valves on the vertical plane coincide with the center of the annular panel.

6. The exhaust valve as described in claim 1, characterized in that, The annular panel and / or the valve body are provided with mounting seats, each valve piece is hinged to the mounting seat, and the mounting seat is detachably provided on the annular panel and / or the valve body.

7. The exhaust valve as described in claim 2, characterized in that, The smoke-proof valve plate includes a guide portion and a sealing portion. The guide portion is inclined. When two smoke-proof valve plates close one of the smoke-proof openings, there is a gap between the guide portions of the two smoke-proof valve plates, and the sealing portions of the two smoke-proof valve plates abut against each other.

8. The exhaust valve as described in claim 1, characterized in that, The valve body has an mounting plate on its outer wall, and / or the valve body includes a second step, the second step including a second large diameter section, a second small diameter section and a second connecting section for connecting the second large diameter section and the second small diameter section, the annular panel is located on the small diameter section, when the valve body has an mounting plate on its outer wall and the valve body includes a second step, the mounting plate is located on the outside of the second large diameter section.

9. The exhaust valve as described in claim 1, characterized in that, Each valve plate includes a metal plate and a flexible ring, the flexible ring being disposed on the metal plate, such that when at least two valve plates close one of the valve ports, the flexible rings of adjacent valve plates are at least partially in contact with each other.

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