Exhaust valve and flue system

Abstract

The present application relates to a kind of exhaust valve and flue system, solve the problem of poor sealing performance of exhaust valve.Exhaust valve includes: body, body is equipped with exhaust passage, exhaust passage is sequentially equipped with first opening and second opening along its gas medium discharge direction, at least part of the second opening is located above first opening, the projection of the second opening on horizontal plane corresponds with the exhaust passage;Main valve piece unit, the main valve piece unit is movably arranged in the body and is used to open or close the first opening, gas medium can push the main valve piece unit to open the first opening, the main valve piece unit can be closed under the action of its gravity The first opening;Sub valve piece unit, the sub valve piece unit is movably arranged in the body and is used to open or close the second opening, gas medium can push the sub valve piece unit to open the second opening, the sub valve piece unit can be closed under the action of its gravity The second opening.

Description

Technical Field

[0001] This invention relates to an exhaust valve and a flue system. Background Technology

[0002] The exhaust valve includes a valve body and a valve disc. The valve body has an exhaust passage with an opening. The valve disc is rotatably connected to the valve body and is used to open or close the opening. Existing valve discs close the opening in two ways: 1. A torsion spring is installed between the valve disc and the valve body, which drives the valve disc to actively close the exhaust port; 2. A magnet is installed on the valve body, and the opening is tilted. After the valve disc closes the opening under its own weight, the magnet attracts the valve disc.

[0003] When the exhaust valve closes the exhaust port by driving the valve plate with a torsion spring, the fumes must first overcome the torsion force of the torsion spring before pushing the valve plate open. When the exhaust valve closes the exhaust port by attracting the valve plate with a magnet, the fumes must first overcome the attraction force of the magnet before pushing the valve plate open. In other words, the existing valve plate requires "external force" to close the opening in order to maintain the sealing performance of the exhaust valve. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide an exhaust valve and flue system that solves the problem of poor sealing performance of the exhaust valve.

[0005] To address the above problems, the present invention provides the following technical solution:

[0006] The exhaust valve includes:

[0007] The body has an exhaust duct, and the exhaust duct has a first opening and a second opening in sequence along its gas medium discharge direction. At least part of the second opening is located above the first opening, and the projection of the second opening on the horizontal plane corresponds to the exhaust duct.

[0008] A main valve plate unit is movably disposed on the body and used to open or close the first opening. The gas medium can push the main valve plate unit to open the first opening, and the main valve plate unit can close the first opening under its own gravity.

[0009] A secondary valve plate unit is movably disposed on the main body and used to open or close the second opening. The gas medium can push the secondary valve plate unit to open the second opening, and the secondary valve plate unit can close the second opening under its own gravity.

[0010] The main valve plate unit, the exhaust duct, and the auxiliary valve plate unit can form a sealed smoke-proof chamber. After the gas medium pushes the main valve plate unit to open the first opening, the gas medium located in the smoke-proof chamber can push the auxiliary valve plate unit to open the second opening.

[0011] In this invention, the main valve plate unit can close the first opening under its own gravity, so that the main valve plate unit can actively close the first opening without the aid of external force; similarly, the auxiliary valve plate unit can close the second opening under its own gravity, so that the auxiliary valve plate unit can actively close the second opening without the aid of external force.

[0012] During the process of the main valve unit closing the first opening and the auxiliary valve unit closing the second opening, the real-time gas pressure in the exhaust duct will fluctuate. Especially when the main valve unit, exhaust duct, and auxiliary valve unit are almost forming a smoke-proof chamber, the gas medium in the smoke-proof chamber will be discharged towards the exhaust valve. At this time, the speed at which the main valve unit closes the first opening will slow down, and the speed at which the auxiliary valve unit closes the second opening will also slow down. This design reduces the noise generated by the main valve unit impacting the main body by decreasing the speed at which the main valve unit closes the first opening; similarly, it reduces the noise generated by the auxiliary valve unit impacting the main body by decreasing the speed at which the auxiliary valve unit closes the second opening.

[0013] In this invention, the exhaust valve includes a main valve plate unit and a secondary valve plate unit. The main valve plate unit, the exhaust duct, and the secondary valve plate unit form a sealed smoke-proof chamber. Since the secondary valve plate unit can close the second opening under its own weight, after the secondary valve plate unit closes the second opening by its own weight, the gaseous medium (including oil fumes) in the smoke-proof chamber will move to the outside of the exhaust valve through the first opening. When the real-time air pressure in the smoke-proof chamber is the same as the air pressure outside the exhaust valve, the main valve plate unit will close the first opening. With this design, the exhaust valve achieves double sealing through the main valve plate unit and the secondary valve plate unit to prevent the gaseous medium in the flue from entering the room through the exhaust valve.

[0014] When indoor gas needs to enter the flue through the exhaust valve, the indoor gas first pushes the main valve unit to open the first opening. After the main valve unit opens the first opening, the real-time gas pressure in the smoke isolation chamber will be greater than the real-time gas pressure in the flue. At this time, the gas in the smoke isolation chamber will push the auxiliary valve unit to open the second opening. With this design, the exhaust valve adjusts the initial thrust required for the indoor gas to enter the flue through the linkage between the main valve unit and the auxiliary valve unit.

[0015] Furthermore, since the weights of the main valve plate unit and the auxiliary valve plate unit remain essentially constant, the fluctuation range of the initial thrust value required for the indoor gas medium to enter the flue is effectively controlled when determined by the weights of the main and auxiliary valve plate units. This design replaces the variables in existing technologies (where the initial thrust value decreases due to the decay of torque and magnetic force) with the constant values ​​in this invention, ensuring that the exhaust valve's service life is effectively extended while maintaining its sealing performance.

[0016] The gas medium moves from bottom to top. Since at least part of the second opening is located above the first opening, when the first and second openings are arranged sequentially along the medium discharge direction of the exhaust duct, the gas medium will actively move from the first opening to the second opening to reduce the time the gas medium stays in the exhaust duct.

[0017] The flue is equipped with several exhaust valves from bottom to top (each floor of the building is usually equipped with one exhaust valve), and the gas medium in the flue also moves from bottom to top. In order to prevent the gas medium in the flue from pushing the secondary valve plate unit to open the second opening, the exhaust valve isolates the gas medium in the flue from direct contact with the secondary valve plate unit through the body. That is, the projection of the secondary valve plate unit on the horizontal plane is located on the body, so as to isolate the force of the gas medium in the flue from being applied to the secondary valve plate unit.

[0018] The principle of indoor gas medium discharge into the flue: The smoke isolation chamber formed by the main valve plate unit, the exhaust duct and the auxiliary valve plate unit has a gas pressure that is close to the same as the indoor gas pressure and the flue gas pressure. After the indoor gas medium enters the smoke isolation chamber through the first opening, the real-time gas pressure value in the smoke isolation chamber will be greater than the flue gas pressure value. Therefore, when the real-time gas pressure value in the smoke isolation chamber is greater than the flue gas pressure value, the gas medium in the smoke isolation chamber will push the auxiliary valve plate unit to open the second opening.

[0019] The principle of preventing gaseous media from entering the room from the flue is as follows: When the main valve plate unit closes the first opening under its own gravity and the auxiliary valve plate unit closes the second opening under its own gravity, the exhaust valve achieves double isolation of the gaseous media from the flue through the main valve plate unit and the auxiliary valve plate unit, allowing the gaseous media from the flue to enter the room through the exhaust valve.

[0020] Furthermore, the main valve plate unit includes at least one main valve plate, and the auxiliary valve plate unit includes at least one auxiliary valve plate. The number of main valve plates in the main valve plate unit differs from the number of auxiliary valve plates in the auxiliary valve plate unit, and the weight of each main valve plate differs from the weight of each auxiliary valve plate.

[0021] When the weight of the main valve plate is greater than the weight of the auxiliary valve plate, the force exerted by the gas medium to move the main valve plate will be less than the force exerted by the gas medium to move the auxiliary valve plate. This structure reduces the minimum force required for the gas medium inside the room to open the exhaust valve, and increases the minimum force required for the gas medium in the flue to open the exhaust valve.

[0022] Furthermore, the main valve plate unit includes two main valve plates, and the auxiliary valve plate unit includes one auxiliary valve plate, wherein the weight of each main valve plate is less than the weight of each auxiliary valve plate.

[0023] Furthermore, both the main valve plate and the auxiliary valve plate are made of metal.

[0024] Since the main valve plate unit and the auxiliary valve plate unit are made of metal, the magnitude of weight change during use will be further reduced.

[0025] Furthermore, the main valve plate and / or the auxiliary valve plate are provided with sealing rings.

[0026] Furthermore, a first sealing ring is provided on the outer side of the main valve plate, and when the main valve plate closes the first opening, the main valve plate and the first sealing ring abut against the body respectively; and / or, a second sealing ring is provided on the outer side of the auxiliary valve plate, and when the auxiliary valve plate closes the second opening, the auxiliary valve plate and the second sealing ring abut against the body respectively.

[0027] At room temperature, the main valve plate and the first sealing ring simultaneously close the first opening, effectively improving the sealing effect of the first opening. At high temperature, the first sealing ring melts on the outside of the main valve plate, preventing the melted first sealing ring from damaging the sealing performance between the main valve plate and the body. Similarly, at room temperature, the auxiliary valve plate and the second sealing ring simultaneously close the second opening, effectively improving the sealing effect of the second opening. At high temperature, the second sealing ring melts on the outside of the auxiliary valve plate, preventing the melted second sealing ring from damaging the sealing performance between the auxiliary valve plate and the body.

[0028] Furthermore, it also includes a first damping element for slowing down the opening speed of the main valve plate unit, the first damping element being directly or indirectly disposed on the body.

[0029] Furthermore, the first damping element includes a damping spring disposed on the body. After the main valve plate unit opens the first opening, the damping spring can abut against the main valve plate unit and is used to slow down the speed at which the main valve plate unit opens the first opening.

[0030] Furthermore, the exhaust valve also includes a first temperature sensing mechanism, which includes a base, a temperature sensing element, a stop plate, a transmission plate, a lever, a rotating shaft, and a torsion spring. The base is fixedly connected to the main body, the stop plate is fixedly connected to the base, the lever is rotatably connected to the main body through the rotating shaft, the transmission plate is connected to the base through the temperature sensing element, and a torsion spring is sleeved on the rotating shaft. One end of the torsion spring is located on the lever, and the other end of the torsion spring is located on the main body.

[0031] When the temperature sensing element has not melted, the torsion spring pushes the lever against the transmission plate, so that the transmission plate is clamped between the lever and the stop plate; when the temperature sensing element melts, the lever pushes the transmission plate to separate from the stop plate; after the lever pushes the transmission plate to separate from the stop plate, the lever pushes the main valve plate to close the first opening.

[0032] Furthermore, the main valve plate is provided with guide ribs, and the lever is provided with a locking rod and the first damping element. The first damping element includes a damping spring, and the damping spring is sleeved on the locking rod.

[0033] After the lever pushes the transmission plate to separate from the stop plate, the locking rod slides along the guide rib, causing the lever to push the main valve plate to close the first opening. This design, by mounting the first damping element to the first temperature sensing mechanism, improves the positional accuracy of the first damping element on the body, ensuring the reliability of its operation.

[0034] Furthermore, the locking rod is threadedly connected to the lever, the damping spring is sleeved on the locking rod, and the damping spring is clamped between the locking rod and the lever. With this design, the axial position of the locking rod relative to the lever can be adjusted by rotating the locking rod. This structure not only allows for adjustable spacing between the locking rod and the guide rib, but also allows for adjustable connection strength between the damping spring and the locking rod and lever.

[0035] Furthermore, the exhaust duct has an exhaust inlet at its first end, and the exhaust duct has the exhaust inlet and a first opening in sequence along its gas medium discharge direction. The main valve plate unit is located inside the exhaust duct. The exhaust duct has an exhaust outlet at its last end, and the second opening is the exhaust outlet. The auxiliary valve plate unit is located on the body outside the exhaust duct.

[0036] Furthermore, the main valve plate unit has an open position and a closed position, the auxiliary valve plate unit has an open position and a closed position, and the speed at which the auxiliary valve plate unit moves from the open position to the closed position is greater than the speed at which the main valve plate unit moves from the open position to the closed position.

[0037] When the speed at which the secondary valve unit moves from the open position to the closed position is greater than the speed at which the primary valve unit moves from the open position to the closed position, the secondary valve unit will close the second opening earlier than the primary valve unit will close the first opening. Since the secondary valve unit is farther from the first opening, the noise transmitted from the secondary valve unit to the room will be less than the noise transmitted from the primary valve unit, thus reducing the operating noise of the exhaust valve. Furthermore, because the secondary valve unit, exhaust duct, and primary valve unit form a sealed smoke-proof chamber, the real-time air pressure inside the smoke-proof chamber must be the same as the air pressure outside the exhaust valve after the secondary valve unit closes the second opening for the primary valve unit to close the first opening. This means that before the primary valve unit closes the first opening, the gas medium inside the smoke-proof chamber needs to be discharged to the outside of the exhaust valve through the first opening. The gas medium discharged to the outside of the exhaust valve through the first opening will exert a reverse force on the primary valve unit, thereby reducing the noise of the primary valve unit impacting the main body.

[0038] Furthermore, since the secondary valve plate unit closes the second opening first, the flow path of the gas medium between the indoor unit and the flue has been blocked by the secondary valve plate unit. Under the premise that the flow path of the gas medium between the indoor unit and the flue has been blocked by the secondary valve plate unit, even if the speed at which the main valve plate unit closes the first opening is reduced, the sealing effect of the exhaust valve will not be affected.

[0039] Furthermore, the exhaust valve also includes a first damping element for slowing down the closing speed of the main valve plate unit at the first opening, the first damping element being directly or indirectly disposed on the body.

[0040] Furthermore, the main valve plate unit is rotatably connected to the body, and the auxiliary valve plate unit is also rotatably connected to the body. The rotation angle of the main valve plate unit relative to the body is greater than the rotation angle of the auxiliary valve plate unit relative to the body. This design, by increasing the rotation path of the main valve plate unit, further slows down the speed at which the main valve plate unit closes the first opening.

[0041] Furthermore, the angle between the main valve plate unit in the open position and the first opening is greater than the angle between the auxiliary valve plate unit in the open position and the second opening. This design, by increasing the angle between the main valve plate unit and the first opening, further slows down the speed at which the main valve plate unit closes the first opening.

[0042] Furthermore, the secondary valve plate is rotatably connected to the main body, and the rotatable connection between the secondary valve plate and the main body is located on the side of the second opening away from the first opening. After the secondary valve plate opens the second opening, the projection of the secondary valve plate on the horizontal plane is located on the main body.

[0043] The height of the second opening on the side closer to the first opening is greater than the height of the second opening on the side farther from the first opening.

[0044] When the height of the second opening near the first opening is greater than the height of the second opening away from the first opening, and the secondary valve plate closes the second opening, the secondary valve plate can prevent the gas medium in the exhaust duct from merging with the gas medium in the flue in the horizontal direction. This design guides the gas medium discharged from the second opening to merge with the gas medium in the flue in the vertical direction, thereby reducing the probability of turbulence in the merging gas medium in the flue.

[0045] Furthermore, it also includes a rheostat, which is detachably mounted on one side of the body located at the first opening;

[0046] The drag reducer is provided with a drag reduction flow channel. When the drag reducer is installed on the body, the drag reduction flow channel corresponds to the first opening, and the cross-section of the drag reduction flow channel gradually decreases along the gas medium discharge direction.

[0047] Furthermore, it also includes a check valve plate unit and a fusible second temperature sensing mechanism. The check valve plate unit and the second temperature sensing mechanism are located in the exhaust passage. The check valve plate unit is movably disposed on the body. The check valve plate unit and the body are also fixedly connected through the second temperature sensing mechanism.

[0048] When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body through the second temperature sensing mechanism, the check valve plate unit can move relative to the body and be used to open or close the first opening.

[0049] When the main valve plate unit closes the first opening and the check valve plate unit closes the first opening, the main valve plate unit, the body and the check valve plate unit form the first cavity.

[0050] When the flue is in a high-temperature environment, the second temperature-sensing mechanism melts, causing the main valve plate unit, the main body, and the check valve plate unit to form a first cavity. The gas medium in the exhaust duct compresses the check valve plate unit, causing some of the gas in the first cavity to be discharged outside the first cavity, thereby creating a negative pressure in the first cavity. This design, with the formation of a negative pressure in the first cavity, further enhances the isolation effect of the check valve plate unit; that is, the isolation effect of the first cavity is greater than that of the main valve plate unit.

[0051] When the check valve plate unit is movable relative to the body and used to open or close the first opening, the melting rate of the second temperature sensing mechanism slows down (the melting rate of the second temperature sensing mechanism closer to the main valve plate unit is slower than that of the second temperature sensing mechanism closer to the auxiliary valve plate unit). This design, by increasing the distance between the check valve plate unit and the flue, extends the time before the first cavity (one of the main valve plate unit, the body, and the check valve plate unit, deforming at high temperatures would cause the first cavity to fail to seal) fails to seal.

[0052] Furthermore, it also includes a check valve plate unit and a fusible second temperature sensing mechanism. The check valve plate unit and the second temperature sensing mechanism are located in the exhaust passage. The check valve plate unit is movably disposed on the body. The check valve plate unit and the body are also fixedly connected through the second temperature sensing mechanism.

[0053] When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body through the second temperature sensing mechanism, the check valve plate unit can move relative to the body and be used to open or close the second opening.

[0054] When the secondary valve plate unit closes the second opening and the check valve plate unit closes the second opening, the secondary valve plate unit, the main body, and the check valve plate unit form a second cavity.

[0055] When the flue is in a high-temperature environment, the second temperature-sensing mechanism melts, causing the auxiliary valve plate unit, the main body, and the check valve plate unit to form a second cavity. The gas medium in the flue compresses the check valve plate unit, causing some of the gas inside the second cavity to be discharged outside, thus creating a negative pressure in the second cavity. This design, with the second cavity forming a negative pressure, further enhances the isolation effect of the check valve plate unit; that is, the isolation effect of the second cavity is greater than that of the main valve plate unit.

[0056] When the check valve plate unit is movable relative to the main body and used to open or close the second opening, the second temperature sensing mechanism can melt quickly (the melting speed of the second temperature sensing mechanism closer to the auxiliary valve plate unit is faster than that of the second temperature sensing mechanism closer to the main valve plate unit). This design, by shortening the distance between the check valve plate unit and the flue, allows the second cavity to form quickly, thereby further increasing the sealing reliability of the exhaust valve.

[0057] Furthermore, the main body is provided with a third opening, and also includes a check valve plate unit and a fusible second temperature sensing mechanism. The check valve plate unit is movably disposed on the main body, and the check valve plate unit and the main body are also fixedly connected through the second temperature sensing mechanism.

[0058] When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body through the second temperature sensing mechanism, the check valve plate unit can move relative to the body and be used to open or close the third opening.

[0059] Specifically, when the main valve plate unit closes the first opening and the check valve plate unit closes the third opening, the main valve plate unit, the body, and the check valve plate unit form a first cavity; or, when the auxiliary valve plate unit closes the second opening and the check valve plate unit closes the third opening, the auxiliary valve plate unit, the body, and the check valve plate unit form a second cavity.

[0060] When the check valve disc unit is movable relative to the main body and used to open or close the third opening, the check valve disc unit will be independent of the main valve disc unit and the auxiliary valve disc unit. This design, by independently setting up the check valve disc unit, reduces the manufacturing cost and assembly difficulty of the exhaust valve.

[0061] Furthermore, the main body includes a valve body and a guide pipe, the first opening and the main valve plate unit are disposed in the valve body, the second opening and the auxiliary valve plate unit are disposed in the guide pipe, and the guide pipe is disposed in the valve body.

[0062] Furthermore, a sound-insulating sealing gasket is sandwiched between the valve body and the guide pipe. This design avoids rigid contact between the valve body and the guide pipe, and the sound-insulating sealing gasket cuts off the sound transmission path between the guide pipe and the valve body.

[0063] Furthermore, the sound-insulating sealing gasket extends at least partially into the smoke-proof chamber; and / or, the sound-insulating sealing gasket is bonded to the valve body and the guide pipe. When the sound-insulating sealing gasket extends at least partially into the smoke-proof chamber, the gap between the valve body and the guide pipe will be completely filled by the sound-insulating sealing gasket. This design effectively prevents turbulence of the gas medium in the gap between the valve body and the guide pipe.

[0064] Furthermore, the exhaust valve also includes a flow equalization structure and a flow equalization plate. The flow equalization structure is disposed on the valve body and communicates with the second opening. The flow equalization structure has an upward-facing upper opening. The flow equalization plate is movably disposed on the flow equalization structure. The flow equalization plate, the upper opening, and the body at different positions on the flow equalization structure form flow equalization ports with different cross-sections.

[0065] Furthermore, the exhaust valve also includes a clamping member, which is movably disposed on the valve body, and the wall of the flue is clamped between the clamping member and the valve body.

[0066] Furthermore, the exhaust valve also includes a second damping element for slowing down the opening speed of the secondary valve plate unit to the second opening, the second damping element being directly or indirectly disposed on the body.

[0067] The flue system includes a flue and at least two exhaust valves, wherein the exhaust valves are exhaust valves as described in any of the above technical solutions, and all exhaust valves are arranged along the height direction of the flue;

[0068] In at least one group of adjacent exhaust valves, the cross-sectional area of ​​the second opening of the lower exhaust valve is greater than the cross-sectional area of ​​the second opening of the upper exhaust valve.

[0069] The flue system includes a flue and at least two exhaust valves, wherein the exhaust valves are exhaust valves as described in any of the above technical solutions, and all exhaust valves are arranged along the height direction of the flue;

[0070] In at least one group of adjacent exhaust valves, the angle between the second opening of the lower exhaust valve and the horizontal plane is greater than the angle between the second opening of the upper exhaust valve and the horizontal plane. Attached Figure Description

[0071] Figure 1 This is a perspective view of the exhaust valve in a preferred embodiment of the present invention;

[0072] Figure 2 This is a perspective view of the exhaust valve (omitting one main valve plate and one auxiliary valve plate) in a preferred embodiment of the present invention;

[0073] Figure 3 This is a perspective view of the valve body (omitting one main valve plate) in a preferred embodiment of the present invention;

[0074] Figure 4This is a top view of the exhaust valve in a preferred embodiment of the present invention;

[0075] Figure 5 for Figure 4 Sectional view at point AA;

[0076] Figure 6 This is a perspective view of the first temperature sensing mechanism in a preferred embodiment of the present invention;

[0077] Figure 7 This is a perspective view of the lever, locking lever, and first damping element in a preferred embodiment of the present invention;

[0078] Figure 8 This is a perspective view of the valve body, main valve plate, and drag reducer in a preferred embodiment of the present invention;

[0079] Figure 9 This is a first cross-sectional view of the valve body, guide pipe, and flue in a preferred embodiment of the present invention;

[0080] Figure 10 This is a second cross-sectional view of the valve body, guide pipe, and flue in a preferred embodiment of the present invention;

[0081] Figure 11 This is a third sectional view of the valve body, guide pipe, and flue in a preferred embodiment of the present invention;

[0082] Figure 12 This is a perspective view of the flow guide tube and the sound insulation sealing gasket in a preferred embodiment of the present invention;

[0083] Figure 13 This is a perspective view of the guide tube and the secondary valve plate unit in a preferred embodiment of the present invention.

[0084] Figure label:

[0085] 1. Body; 11. Valve body; 12. Guide pipe; 100. Smoke isolation chamber; 110. Exhaust duct; 111. First opening; 112. Exhaust inlet; 121. Second opening.

[0086] 2. Main valve plate unit, 21. Guide rib;

[0087] 3. Sub-valve plate unit;

[0088] 4. First temperature sensing mechanism; 41. Base; 42. Temperature sensing element; 43. Stop plate; 44. Transmission plate; 45. Lever; 46. Rotating shaft; 47. Torsion spring; 48. Locking rod.

[0089] 5. Rheostatizer

[0090] 6. First damping component; 61. Second damping component;

[0091] 7. Clamping components;

[0092] 8. Flue; 81. Exhaust duct;

[0093] 9. Soundproof sealing gasket. Detailed Implementation

[0094] 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.

[0095] See Figure 1 , Figure 2 and Figure 3 The exhaust valve includes:

[0096] The main body 1 is provided with an exhaust duct 110. The exhaust duct 110 is provided with a first opening 111 and a second opening 121 in sequence along its gas medium discharge direction. At least part of the second opening 121 is located above the first opening 111. The projection of the second opening 121 on the horizontal plane corresponds to the exhaust duct 110.

[0097] The main valve plate unit 2 is movably disposed on the body 1 and is used to open or close the first opening 111. The gas medium can push the main valve plate unit 2 to open the first opening 111, and the main valve plate unit 2 can close the first opening 111 under its own gravity.

[0098] The auxiliary valve plate unit 3 is movably disposed on the main body 1 and is used to open or close the second opening 121. The gas medium can push the auxiliary valve plate unit 3 to open the second opening 121, and the auxiliary valve plate unit 3 can close the second opening 121 under its own gravity.

[0099] The main valve plate unit 2, the exhaust duct 110, and the auxiliary valve plate unit 3 can form a sealed smoke-proof cavity 100, such as... Figure 4 and Figure 5 As shown; after the gas medium pushes the main valve plate unit 2 to open the first opening 111, the gas medium located in the smoke isolation chamber 100 can push the auxiliary valve plate unit 3 to open the second opening 121.

[0100] In this invention, the main valve plate unit 2 can close the first opening 111 under its own gravity, so that the main valve plate unit 2 can actively close the first opening 111 without the aid of external force; similarly, the auxiliary valve plate unit 3 can close the second opening 121 under its own gravity, so that the auxiliary valve plate unit 3 can actively close the second opening 121 without the aid of external force.

[0101] During the process of the main valve plate unit 2 closing the first opening 111 and the auxiliary valve plate unit 3 closing the second opening 121, the real-time gas pressure value in the exhaust duct 110 will fluctuate; especially when the main valve plate unit 2, the exhaust duct 110 and the auxiliary valve plate unit 3 are about to form the smoke isolation chamber 100, the gas medium in the smoke isolation chamber 100 will be discharged to the outside of the exhaust valve. At this time, the speed at which the main valve plate unit 2 closes the first opening 111 will slow down and the speed at which the auxiliary valve plate unit 3 closes the second opening 121 will also slow down.

[0102] In this invention, the noise generated by the main valve plate unit 2 impacting the body 1 is reduced by decreasing the speed at which the main valve plate unit 2 closes the first opening 111; similarly, the noise generated by the secondary valve plate unit 3 impacting the body 1 is reduced by decreasing the speed at which the secondary valve plate unit 3 closes the second opening 121.

[0103] See Figure 2 , Figure 3 and Figure 5 The exhaust valve includes a main valve plate unit 2 and a secondary valve plate unit 3. The main valve plate unit 2, the exhaust duct 110, and the secondary valve plate unit 3 form a sealed smoke-proof chamber 100. Since the secondary valve plate unit 3 can close the second opening 121 under its own weight, after the secondary valve plate unit 3 closes the second opening 121 by its own weight, the gas medium (including oil fumes) in the smoke-proof chamber 100 will move to the outside of the exhaust valve through the first opening 111. When the real-time air pressure in the smoke-proof chamber 100 is the same as the air pressure outside the exhaust valve, the main valve plate unit 2 will close the first opening 111. The exhaust valve achieves double sealing through the main valve plate unit 2 and the secondary valve plate unit 3 to prevent the gas medium in the smoke exhaust duct 81 from entering the room through the exhaust valve.

[0104] See Figure 1 and Figure 9 When indoor gas needs to enter flue 8 through exhaust valve, the indoor gas first pushes the main valve plate unit 2 to open the first opening 111. After the main valve plate unit 2 opens the first opening 111, the real-time gas pressure value in the smoke isolation chamber 110 will be greater than the real-time gas pressure value in the exhaust channel 81. At this time, the gas in the smoke isolation chamber 110 will push the auxiliary valve plate unit 3 to open the second opening 121. The exhaust valve adjusts the initial thrust value required for indoor gas to enter flue 8 through the linkage between the main valve plate unit 2 and the auxiliary valve plate unit 3.

[0105] Since the weights of the main valve plate unit 2 and the auxiliary valve plate unit 3 remain essentially constant, the fluctuation range of the initial thrust value required for the indoor gas medium to enter the flue 8 is effectively controlled when determined by the weights of the main valve plate unit 2 and the auxiliary valve plate unit 3. This invention replaces the variables in the prior art (due to the decay period of the torsion spring's torque and the magnet's magnetic force, the initial thrust value decreases as the torque and magnetic force decay) with the fixed values ​​in this invention, ensuring that the exhaust valve's service life is effectively extended while maintaining its sealing performance.

[0106] See Figure 9 , Figure 10 and Figure 11 The gas medium moves from bottom to top. Since at least part of the second opening 121 is located above the first opening 111, when the first opening 111 and the second opening 121 are arranged sequentially along the medium discharge direction of the exhaust duct 110, the gas medium will actively move from the first opening 111 to the second opening 121, so as to reduce the time the gas medium stays in the exhaust duct 110.

[0107] The flue 8 is equipped with several exhaust valves from bottom to top (each floor of the building is usually equipped with one exhaust valve). The flue 8 is equipped with a smoke exhaust channel 81, and the movement direction of the gas medium in the smoke exhaust channel 81 is also from bottom to top. In order to prevent the gas medium in the smoke exhaust channel 81 from pushing the secondary valve plate unit 3 to open the second opening 121, the exhaust valve isolates the gas medium in the smoke exhaust channel 81 from direct contact with the secondary valve plate unit 3 through the body 1. That is, the projection of the secondary valve plate unit 3 on the horizontal plane is located on the body 1, so as to isolate the force of the gas medium in the flue 8 from being applied to the secondary valve plate unit 3.

[0108] The principle of gas medium being discharged from the room to the flue 8: The main valve plate unit 2, the exhaust duct 110 and the auxiliary valve plate unit 3 form a sealed smoke isolation chamber 100. The air pressure in the sealed smoke isolation chamber 100 is close to the air pressure in the room and the air pressure in the exhaust duct 81. After the gas medium in the room enters the smoke isolation chamber 100 through the first opening 111, the smoke isolation chamber 100 will lose its sealing effect, so that the real-time air pressure value in the smoke isolation chamber 100 will be greater than the air pressure value in the flue 8. Therefore, when the real-time air pressure value in the smoke isolation chamber 100 is greater than the air pressure value in the flue 8, the gas medium in the smoke isolation chamber 100 will push the auxiliary valve plate unit 3 to open the second opening 121.

[0109] The principle of preventing gaseous medium from entering the room through flue 8 is as follows: When the main valve plate unit 2 closes the first opening 111 under its own gravity and the auxiliary valve plate unit 3 closes the second opening 121 under its own gravity, the exhaust valve achieves double isolation through the main valve plate unit 2 and the auxiliary valve plate unit 3, preventing gaseous medium from entering the room through flue 8.

[0110] In this embodiment, the main valve plate unit 2 includes at least one main valve plate (unmarked), and the auxiliary valve plate unit 3 includes at least one auxiliary valve plate (unmarked). The number of main valve plates in the main valve plate unit 2 differs from the number of auxiliary valve plates in the auxiliary valve plate unit 3. The weight of each main valve plate differs from the weight of each auxiliary valve plate. Specifically: see Figure 1 and Figure 2 The main valve plate unit 2 includes two main valve plates, and the auxiliary valve plate unit 3 includes one auxiliary valve plate. The weight of each main valve plate is less than the weight of each auxiliary valve plate.

[0111] When the weight of the main valve plate is greater than the weight of the auxiliary valve plate, the force exerted by the gas medium to move the main valve plate will be less than the force exerted by the gas medium to move the auxiliary valve plate. This structure reduces the minimum force required for the gas medium inside the room to open the exhaust valve, and increases the minimum force required for the gas medium inside the flue 8 to open the exhaust valve.

[0112] Preferably, the main valve plate and the auxiliary valve plate are made of metal. Since the main valve plate unit 2 and the auxiliary valve plate unit 3 are made of metal, the magnitude of weight change during use will be further reduced.

[0113] In this embodiment, the main valve plate and / or the auxiliary valve plate are provided with sealing rings. Specifically, the outer side of the main valve plate is provided with a first sealing ring (not marked). When the main valve plate closes the first opening 111, the main valve plate and the first sealing ring abut against the body 1 respectively; and / or, the outer side of the auxiliary valve plate is provided with a second sealing ring. When the auxiliary valve plate closes the second opening 121, the auxiliary valve plate and the second sealing ring abut against the body 1 respectively.

[0114] At room temperature, the main valve plate and the first sealing ring simultaneously close the first opening 111, effectively improving the sealing effect of the first opening 111. At high temperature, the first sealing ring melts on the outside of the main valve plate, preventing the melted first sealing ring from damaging the sealing performance between the main valve plate and the body 1. Similarly, at room temperature, the auxiliary valve plate and the second sealing ring simultaneously close the second opening 121, effectively improving the sealing effect of the second opening 121. At high temperature, the second sealing ring melts on the outside of the auxiliary valve plate, preventing the melted second sealing ring from damaging the sealing performance between the auxiliary valve plate and the body 1.

[0115] See Figure 3 , Figure 5 , Figure 6 and Figure 7The exhaust valve also includes a first damping element 6 for slowing down the opening speed of the main valve plate unit 2 at the first opening 111. The first damping element 6 is directly or indirectly disposed on the body 1. This structure prevents the main valve plate unit 2 from exceeding the critical position. If the main valve plate unit 2 exceeds the critical position, it will move in the opposite direction to the first opening 111 under its own gravity, so that the main valve plate unit 2 cannot close the first opening 111.

[0116] In this invention, the exhaust valve further includes a first temperature sensing mechanism 4, which includes a base 41, a temperature sensing element 42, a stop plate 43, a transmission plate 44, a lever 45, a rotating shaft 46, and a torsion spring 47. The base 41 is fixedly connected to the main body 1, the stop plate 43 is fixedly connected to the base 41, the lever 45 is rotatably connected to the main body 1 via the rotating shaft 46, the transmission plate 44 is connected to the base 41 via the temperature sensing element 42, and a torsion spring 47 is sleeved on the rotating shaft 46. A torsion spring 47 is located at one end of a lever 45 and the other end of a torsion spring 47 is located on the main body 1. When the temperature sensing element 42 has not melted, the torsion spring 47 pushes the lever 45 to abut against the transmission plate 44, so that the transmission plate 44 is clamped between the lever 45 and the stop plate 43. When the temperature sensing element 42 melts, the torsion spring 47 pushes the transmission plate 44 and the stop plate 43 to separate through the lever 45. After the lever 45 pushes the transmission plate 44 and the stop plate 43 to separate, the lever 45 pushes the main valve plate unit 2 to close the first opening 111. The main valve plate is provided with a guide rib 21, and the lever 45 is provided with a locking rod 48 and a first damping element 6. The first damping element 6 includes a damping spring, which is sleeved on the locking rod 48. After the lever 45 pushes the transmission plate 44 and the stop plate 43 to separate, the locking rod 48 slides along the guide rib 21, so that the lever 45 pushes the main valve plate to close the first opening 111. In other embodiments of the present invention, the first damping element includes a damping spring plate disposed on the body. After the main valve plate unit opens the first opening, the damping spring plate can abut against the main valve plate unit and is used to slow down the speed at which the main valve plate unit opens the first opening.

[0117] In this invention, the first damping element 6 is installed on the first temperature sensing mechanism 4. By improving the positional accuracy of the first damping element 6 on the body 1, the reliability of the operation of the first damping element 6 is ensured.

[0118] See 1. Figure 2 and Figure 13 The exhaust valve also includes a second damping element 61 for slowing down the opening speed of the secondary valve plate unit 3 into the second opening 121. The second damping element 61 is directly or indirectly disposed on the body 1. This structure prevents the secondary valve plate unit 3 from exceeding the critical position. If the secondary valve plate unit 3 exceeds the critical position, it will move in the opposite direction to the second opening 121 under its own gravity, so that the secondary valve plate unit 3 cannot close the second opening 121.

[0119] Preferably, the second damping element 61 can be a damping spring, or the second damping element 61 can be a damping sheet.

[0120] See Figure 6 and Figure 7 The locking rod 48 is threadedly connected to the lever 45. A damping spring is sleeved on the locking rod 48 and clamped between the locking rod 48 and the lever 45. The axial position of the locking rod 48 relative to the lever 45 can be adjusted by rotating the locking rod 48. This structure not only allows for adjustable spacing between the locking rod 48 and the guide rib 21, but also allows for adjustable connection strength between the damping spring and the locking rod 48 and the lever 45.

[0121] See Figure 1 , Figure 2 and Figure 9 The exhaust duct is provided with an exhaust inlet 112 at the beginning and an exhaust inlet 112 and a first opening 111 in sequence along the direction of gas medium discharge. The main valve plate unit 2 is located inside the exhaust duct 110. The exhaust duct 110 is provided with an exhaust outlet at the end and a second opening 121 is the exhaust outlet. The auxiliary valve plate unit 3 is located on the body 1 outside the exhaust duct 110.

[0122] In this invention, the main valve plate unit 2 has an open position and a closed position, and the auxiliary valve plate unit 3 has an open position and a closed position. The speed at which the auxiliary valve plate unit 3 moves from the open position to the closed position is greater than the speed at which the main valve plate unit 2 moves from the open position to the closed position.

[0123] When the speed at which the secondary valve plate unit 3 moves from the open position to the closed position is greater than the speed at which the main valve plate unit 2 moves from the open position to the closed position, the time when the secondary valve plate unit 3 closes the second opening 121 will be earlier than the time when the main valve plate unit 2 closes the first opening 111. Since the secondary valve plate unit 3 is far away from the first opening 111, the noise transmitted to the room by the secondary valve plate unit 3 will be less than the noise transmitted to the room by the main valve plate unit 2, thereby reducing the operating noise of the exhaust valve. Furthermore, since the secondary valve plate unit 3, the exhaust duct 110, and the main valve plate unit 2 form a sealed smoke-proof chamber 110, after the secondary valve plate unit 3 closes the second opening 121, the real-time air pressure value inside the smoke-proof chamber 110 needs to be the same as the air pressure value outside the exhaust valve in order for the main valve plate unit 2 to close the first opening 111. This means that before the main valve plate unit 2 closes the first opening 111, the gas medium inside the smoke-proof chamber 110 needs to be discharged to the outside of the exhaust valve through the first opening 111. The gas medium discharged to the outside of the exhaust valve through the first opening 111 will exert a reverse force on the main valve plate unit 2, thereby reducing the noise of the main valve plate unit 2 impacting the body 1.

[0124] Furthermore, since the secondary valve plate unit 3 closes the second opening 121 first, the flow path of the gas medium between the room and the flue 8 has been blocked by the secondary valve plate unit 3. Under the premise that the flow path of the gas medium between the room and the flue 8 has been blocked by the secondary valve plate unit 3, even if the speed at which the main valve plate unit 2 closes the first opening 111 is reduced, the sealing effect of the exhaust valve will not be affected.

[0125] See Figure 8 The exhaust valve also includes a first damping element 6 for slowing down the speed at which the main valve plate unit 2 closes the first opening 111. The first damping element 6 is directly or indirectly disposed on the body 1.

[0126] In this embodiment, the main valve plate unit 2 is rotatably connected to the body 1, and the auxiliary valve plate unit 3 is rotatably connected to the body 1. The rotation angle of the main valve plate unit 2 relative to the body 1 is greater than the rotation angle of the auxiliary valve plate unit 3 relative to the body 1. In this structure, by increasing the rotation path of the main valve plate unit 2, the speed at which the main valve plate unit 2 closes the first opening 111 is slowed down. In other embodiments of the present invention, the angle between the main valve plate unit in the open position and the first opening is greater than the angle between the auxiliary valve plate unit in the open position and the second opening; that is, by increasing the angle between the main valve plate unit and the first opening, the speed at which the main valve plate unit closes the first opening is further slowed down.

[0127] See Figure 1 , Figure 5 and Figure 9 The auxiliary valve plate is rotatably connected to the main body 1. The rotatable connection between the auxiliary valve plate and the main body 1 is located on the side of the second opening 121 away from the first opening 111. After the auxiliary valve plate opens the second opening 121, the projection of the auxiliary valve plate on the horizontal plane is located on the main body 1.

[0128] Wherein, the height of the second opening 121 on the side closer to the first opening 111 is greater than the height of the second opening 121 on the side farther from the first opening 111.

[0129] When the height of the second opening 121 near the first opening 111 is greater than the height of the second opening 121 away from the first opening 111, and the secondary valve plate closes the second opening 121, the secondary valve plate can prevent the gas medium in the exhaust duct from merging with the gas medium in the flue 8 in the horizontal direction. In other words, by guiding the gas medium discharged from the second opening 121 to merge with the gas medium in the flue 8 in the vertical direction, the probability of turbulence occurring in the merging gas medium in the flue 8 is reduced.

[0130] See Figure 8 The exhaust valve also includes a drag reducer 5, which is detachably disposed on one side of the body 1 located at the first opening 111.

[0131] Among them, the drag reducer 5 is provided with a drag reduction flow channel 51. When the drag reducer 5 is provided on the body 1, the drag reduction flow channel 51 corresponds to the first opening 111, and the cross-section of the drag reduction flow channel 51 gradually shrinks along the gas medium discharge direction.

[0132] In this embodiment, the preferred exhaust valve further includes a check valve plate unit (unmarked) and a fusible second temperature sensing mechanism (unmarked). The check valve plate unit and the second temperature sensing mechanism can be configured in three ways:

[0133] In the first method, the check valve plate unit and the second temperature sensing mechanism are located in the exhaust duct 110. The check valve plate unit is movably disposed on the body 1, and the check valve plate unit and the body 1 are also fixedly connected through the second temperature sensing mechanism.

[0134] When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body 1 through the second temperature sensing mechanism, the check valve plate unit can move relative to the body 1 and be used to open or close the first opening 111.

[0135] When the main valve plate unit 2 closes the first opening 111 and the check valve plate unit closes the first opening 111, the main valve plate unit 2, the body 1 and the check valve plate unit form a first cavity (not marked).

[0136] When the flue 8 is in a high-temperature environment, the second temperature-sensing mechanism melts, causing the main valve plate unit 2, the body 1, and the check valve plate unit to form a first cavity. The gas medium in the exhaust duct 110 compresses the check valve plate unit, causing some of the gas in the first cavity to be discharged outside the first cavity, thereby creating a negative pressure in the first cavity. The negative pressure in the first cavity further enhances the isolation effect of the check valve plate unit, meaning that the isolation effect of the first cavity is greater than that of the main valve plate unit 2.

[0137] When the check valve plate unit is movable relative to the body 1 and used to open or close the first opening 111, the melting speed of the second temperature sensing mechanism slows down (the melting speed of the second temperature sensing mechanism closer to the main valve plate unit 2 is slower than the melting speed of the second temperature sensing mechanism closer to the auxiliary valve plate unit 3). In this structure, by increasing the distance between the check valve plate unit and the flue 8, the time of sealing failure of the first cavity (one of the main valve plate unit 2, the body 1, and the check valve plate unit will cause the first cavity to fail to seal if it deforms at high temperature) is extended.

[0138] In the second method, the check valve plate unit and the second temperature sensing mechanism are located in the exhaust duct 110. The check valve plate unit is movably disposed on the body 1, and the check valve plate unit and the body 1 are also fixedly connected through the second temperature sensing mechanism.

[0139] When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body 1 through the second temperature sensing mechanism, the check valve plate unit can move relative to the body 1 and be used to open or close the second opening 121.

[0140] When the secondary valve plate unit 3 closes the second opening 121 and the check valve plate unit closes the second opening 121, the secondary valve plate unit 3, the main body 1 and the check valve plate unit form a second cavity (not marked).

[0141] When flue 8 is in a high-temperature environment, the second temperature-sensing mechanism melts, causing the auxiliary valve plate unit 3, the main body 1, and the check valve plate unit to form a second cavity. The gas medium in flue 8 compresses the check valve plate unit, causing some of the gas inside the second cavity to be discharged outside the second cavity, thereby creating a negative pressure in the second cavity. The negative pressure in the second cavity further enhances the isolation effect of the check valve plate unit, meaning that the isolation effect of the second cavity is greater than that of the main valve plate unit 2.

[0142] When the check valve plate unit is movable relative to the main body 1 and used to open or close the second opening 121, the second temperature sensing mechanism can melt quickly (the melting speed of the second temperature sensing mechanism near the auxiliary valve plate unit 3 is faster than the melting speed of the second temperature sensing mechanism near the main valve plate unit 2). In this structure, by shortening the interval distance between the check valve plate unit and the flue, the second cavity is formed quickly, thereby further increasing the sealing reliability of the exhaust valve.

[0143] In the second method, a third opening (unmarked) is provided on the main body, and the check valve plate unit is movably disposed on the main body 1. The check valve plate unit and the main body 1 are also fixedly connected through a second temperature sensing mechanism.

[0144] When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body 1 through the second temperature sensing mechanism, the check valve plate unit can move relative to the body 1 and be used to open or close the third opening.

[0145] Specifically, when the main valve plate unit 2 closes the first opening 111 and the check valve plate unit closes the third opening, the main valve plate unit 2, the body 1, and the check valve plate unit form a first cavity; or, when the auxiliary valve plate unit 3 closes the second opening 121 and the check valve plate unit closes the third opening, the auxiliary valve plate unit 3, the body 1, and the check valve plate unit form a second cavity.

[0146] When the check valve unit is movable relative to the main body 1 and used to open or close the third opening, the check valve unit is independent of the main valve unit and the auxiliary valve unit. In this structure, the check valve unit is set independently, which reduces the manufacturing cost and assembly difficulty of the exhaust valve.

[0147] See Figure 1 , Figure 2and Figure 10 The main body 1 includes a valve body 11 and a guide pipe 12. The first opening 111 and the main valve plate unit 2 are located on the valve body 11, and the second opening 121 and the auxiliary valve plate unit 3 are located on the guide pipe 12. The guide pipe 12 is located on the valve body 11.

[0148] See Figure 1 and Figure 12 A sound-insulating sealing gasket 9 is sandwiched between the valve body 11 and the guide pipe 12. This structure avoids rigid contact between the valve body 11 and the guide pipe 12, and the sound-insulating sealing gasket 9 cuts off the sound transmission path between the guide pipe 12 and the valve body 11.

[0149] Preferably, the sound-insulating sealing gasket 9 extends at least partially into the smoke-proof chamber 110; and / or, the sound-insulating sealing gasket 9 is bonded to the valve body 11 and the guide pipe 12. When the sound-insulating sealing gasket 9 extends at least partially into the smoke-proof chamber 110, the gap between the valve body 11 and the guide pipe 12 will be completely filled by the sound-insulating sealing gasket 9. This structure effectively prevents turbulence of the gas medium in the gap between the valve body 11 and the guide pipe 12.

[0150] In this embodiment, the exhaust valve also includes a flow equalization structure (unmarked) and a flow equalization plate (unmarked). The flow equalization structure is disposed on the valve body 11 and communicates with the second opening 121. The flow equalization structure is provided with an upward-facing upper opening (unmarked). The flow equalization plate is movably disposed on the flow equalization structure. The flow equalization plate, the upper opening and the body at different positions on the flow equalization structure form flow equalization ports (unmarked) with different cross-sections.

[0151] See Figure 1 and Figure 4 The exhaust valve also includes a clamping member 7, which is movably disposed on the valve body 11, and the wall of the flue 8 is clamped between the clamping member 7 and the valve body 11.

[0152] See Figure 9 , Figure 10 and Figure 11 The flue system includes a flue 8 and at least two exhaust valves, wherein the exhaust valves are the exhaust valves described in this embodiment, and all exhaust valves are arranged along the height direction of the flue 8;

[0153] In at least one group of adjacent exhaust valves, the cross-sectional area of ​​the second opening 121 of the lower exhaust valve is greater than the cross-sectional area of ​​the second opening 121 of the upper exhaust valve, i.e. Figure 9 The exhaust valve is located at Figure 10 Above the exhaust valve Figure 9 The length dimension of H in the middle is greater than Figure 10 The length dimension of H in the middle, Figure 10 The exhaust valve is located at Figure 11 Above the exhaust valve Figure 10 The length dimension of H in the middle is greater than Figure 11 The length dimension of H in the middle.

[0154] See Figure 9 , Figure 10 and Figure 11 The flue system includes a flue 8 and at least two exhaust valves, wherein the exhaust valves are the exhaust valves described in this embodiment, and all exhaust valves are arranged along the height direction of the flue 8;

[0155] In at least one group of adjacent exhaust valves, the angle between the second opening 121 of the lower exhaust valve and the horizontal plane is greater than the angle between the second opening 121 of the upper exhaust valve and the horizontal plane. Figure 9 The exhaust valve is located at Figure 10 Above the exhaust valve Figure 9 Angle of a > Figure 10 Angle a in the middle, Figure 10 The exhaust valve is located at Figure 11 Above the exhaust valve Figure 10 Angle of a > Figure 11 Angle a in the middle.

[0156] 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: The body has an exhaust duct, and the exhaust duct has a first opening and a second opening in sequence along its gas medium discharge direction. At least part of the second opening is located above the first opening, and the projection of the second opening on the horizontal plane corresponds to the exhaust duct. A main valve plate unit is movably disposed on the body and used to open or close the first opening. The gas medium can push the main valve plate unit to open the first opening, and the main valve plate unit can close the first opening under its own gravity. A secondary valve plate unit is movably disposed on the main body and used to open or close the second opening. The gas medium can push the secondary valve plate unit to open the second opening, and the secondary valve plate unit can close the second opening under its own gravity. The main valve plate unit, the exhaust duct, and the auxiliary valve plate unit can form a sealed smoke-proof chamber. After the gas medium pushes the main valve plate unit to open the first opening, the gas medium located in the smoke-proof chamber can push the auxiliary valve plate unit to open the second opening.

2. The exhaust valve as described in claim 1, characterized in that, The main valve plate unit includes at least one main valve plate, and the auxiliary valve plate unit includes at least one auxiliary valve plate. The number of main valve plates in the main valve plate unit differs from the number of auxiliary valve plates in the auxiliary valve plate unit, and the weight of each main valve plate differs from the weight of each auxiliary valve plate.

3. The exhaust valve as described in claim 2, characterized in that, The main valve plate unit includes two main valve plates, and the auxiliary valve plate unit includes one auxiliary valve plate. The weight of each main valve plate is less than the weight of each auxiliary valve plate.

4. The exhaust valve as described in claim 2, characterized in that, The main valve plate and the auxiliary valve plate are made of metal.

5. The exhaust valve as described in claim 2, characterized in that, The main valve plate and / or the auxiliary valve plate are provided with sealing rings.

6. The exhaust valve as described in claim 5, characterized in that, The main valve plate has a first sealing ring on its outer side. When the main valve plate closes the first opening, the main valve plate and the first sealing ring abut against the body respectively; and / or, the auxiliary valve plate has a second sealing ring on its outer side. When the auxiliary valve plate closes the second opening, the auxiliary valve plate and the second sealing ring abut against the body respectively.

7. The exhaust valve as described in any one of claims 1 to 6, characterized in that, The exhaust valve further includes a first damping element for slowing down the opening speed of the main valve plate unit, the first damping element being directly or indirectly disposed on the body.

8. The exhaust valve as described in claim 7, characterized in that, The first damping element includes a damping spring disposed on the body. After the main valve plate unit opens the first opening, the damping spring can abut against the main valve plate unit and is used to slow down the speed at which the main valve plate unit opens the first opening.

9. The exhaust valve as described in claim 7, characterized in that, The exhaust valve further includes a first temperature sensing mechanism, which includes a base, a temperature sensing element, a stop plate, a transmission plate, a lever, a rotating shaft, and a torsion spring. The base is fixedly connected to the main body, the stop plate is fixedly connected to the base, the lever is rotatably connected to the main body through the rotating shaft, the transmission plate is connected to the base through the temperature sensing element, and a torsion spring is sleeved on the rotating shaft. One end of the torsion spring is located on the lever, and the other end of the torsion spring is located on the main body. When the temperature sensing element has not melted, the torsion spring pushes the lever against the transmission plate, so that the transmission plate is clamped between the lever and the stop plate; when the temperature sensing element melts, the lever pushes the transmission plate to separate from the stop plate; after the lever pushes the transmission plate to separate from the stop plate, the lever pushes the main valve plate unit to close the first opening.

10. The exhaust valve as described in claim 9, characterized in that, The main valve plate unit includes at least one main valve plate, the main valve plate is provided with a guide rib, the lever is provided with a locking rod and the first damping element, the first damping element includes a damping spring, the damping spring is sleeved on the locking rod; After the lever pushes the transmission plate to separate from the stop plate, the locking rod slides along the guide rib so that the lever pushes the main valve plate to close the first opening.

11. The exhaust valve as claimed in claim 10, characterized in that, The locking rod is threadedly connected to the lever, the damping spring is sleeved on the locking rod, and the damping spring is clamped between the locking rod and the lever.

12. The exhaust valve as described in any one of claims 1 to 6, characterized in that, The exhaust duct has an exhaust inlet at its first end, and the exhaust duct has the exhaust inlet and a first opening in sequence along its gas medium discharge direction. The main valve plate unit is located inside the exhaust duct. The exhaust duct has an exhaust outlet at its last end, and the second opening is the exhaust outlet. The auxiliary valve plate unit is located on the body outside the exhaust duct.

13. The exhaust valve as described in any one of claims 1 to 6, characterized in that, The main valve plate unit has an open position and a closed position, and the auxiliary valve plate unit has an open position and a closed position. The speed at which the auxiliary valve plate unit moves from the open position to the closed position is greater than the speed at which the main valve plate unit moves from the open position to the closed position.

14. The exhaust valve as claimed in claim 13, characterized in that, The exhaust valve further includes a first damping element for slowing down the closing speed of the main valve plate unit at the first opening, the first damping element being directly or indirectly disposed on the body.

15. The exhaust valve as described in claim 13, characterized in that, The main valve plate unit is rotatably connected to the body, and the auxiliary valve plate unit is rotatably connected to the body. The rotation angle of the main valve plate unit relative to the body is greater than the rotation angle of the auxiliary valve plate unit relative to the body.

16. The exhaust valve as claimed in claim 13, characterized in that, The angle between the main valve plate unit in the open position and the first opening is greater than the angle between the auxiliary valve plate unit in the open position and the second opening.

17. The exhaust valve as described in any one of claims 1 to 6, characterized in that, It also includes a rheostat, which is detachably mounted on one side of the body located at the first opening; The drag reducer is provided with a drag reduction flow channel. When the drag reducer is installed on the body, the drag reduction flow channel corresponds to the first opening, and the cross-section of the drag reduction flow channel gradually decreases along the gas medium discharge direction.

18. The exhaust valve as described in any one of claims 1 to 6, characterized in that, It also includes a check valve plate unit and a fusible second temperature sensing mechanism. The check valve plate unit and the second temperature sensing mechanism are located in the exhaust passage. The check valve plate unit is movably disposed on the body. The check valve plate unit and the body are also fixedly connected through the second temperature sensing mechanism. When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body through the second temperature sensing mechanism, the check valve plate unit can move relative to the body and be used to open or close the first opening. When the main valve plate unit closes the first opening and the check valve plate unit closes the first opening, the main valve plate unit, the body and the check valve plate unit form the first cavity.

19. The exhaust valve as described in any one of claims 1 to 6, characterized in that, It also includes a check valve plate unit and a fusible second temperature sensing mechanism. The check valve plate unit and the second temperature sensing mechanism are located in the exhaust passage. The check valve plate unit is movably disposed on the body. The check valve plate unit and the body are also fixedly connected through the second temperature sensing mechanism. When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body through the second temperature sensing mechanism, the check valve plate unit can move relative to the body and be used to open or close the second opening. When the secondary valve plate unit closes the second opening and the check valve plate unit closes the second opening, the secondary valve plate unit, the main body, and the check valve plate unit form a second cavity.

20. The exhaust valve as described in any one of claims 1 to 6, characterized in that, The body has a third opening and also includes a check valve plate unit and a fusible second temperature sensing mechanism. The check valve plate unit is movably disposed on the body, and the check valve plate unit and the body are also fixedly connected through the second temperature sensing mechanism. When the second temperature sensing mechanism melts and the check valve plate unit is not fixedly connected to the body through the second temperature sensing mechanism, the check valve plate unit can move relative to the body and be used to open or close the third opening. Specifically, when the main valve plate unit closes the first opening and the check valve plate unit closes the third opening, the main valve plate unit, the body, and the check valve plate unit form a first cavity; or, when the auxiliary valve plate unit closes the second opening and the check valve plate unit closes the third opening, the auxiliary valve plate unit, the body, and the check valve plate unit form a second cavity.

21. The exhaust valve as described in any one of claims 1 to 6, characterized in that, The main body includes a valve body and a guide pipe. The first opening and the main valve plate unit are disposed in the valve body, and the second opening and the auxiliary valve plate unit are disposed in the guide pipe. The guide pipe is disposed in the valve body.

22. The exhaust valve as claimed in claim 21, characterized in that, A sound-insulating sealing gasket is sandwiched between the valve body and the guide pipe.

23. The exhaust valve as claimed in claim 22, characterized in that, The sound-insulating sealing gasket extends at least partially into the smoke-proof cavity; and / or, the sound-insulating sealing gasket is bonded to the valve body and the flow guide tube.

24. The exhaust valve as claimed in claim 21, characterized in that, The exhaust valve also includes a flow equalization structure and a flow equalization plate. The flow equalization structure is located on the valve body and communicates with the second opening. The flow equalization structure has an upward-facing upper opening. The flow equalization plate is movably located on the flow equalization structure. The flow equalization plate, the upper opening, and the body at different positions on the flow equalization structure form flow equalization ports with different cross-sections.

25. The exhaust valve as claimed in claim 21, characterized in that, The exhaust valve also includes a clamping member, which is movably disposed on the valve body, and the wall of the flue is clamped between the clamping member and the valve body.

26. The exhaust valve as described in any one of claims 1 to 6, characterized in that, The exhaust valve further includes a second damping element for slowing down the opening speed of the secondary valve plate unit to the second opening, the second damping element being directly or indirectly disposed on the body.

27. A flue system, comprising a flue and at least two exhaust valves, characterized in that, The exhaust valve is the exhaust valve as described in any one of claims 1 to 26, and all exhaust valves are arranged along the height direction of the flue. In at least one group of adjacent exhaust valves, the cross-sectional area of ​​the second opening of the lower exhaust valve is greater than the cross-sectional area of ​​the second opening of the upper exhaust valve.

28. A flue system, comprising a flue and at least two exhaust valves, characterized in that, The exhaust valve is the exhaust valve as described in any one of claims 1 to 26, and all exhaust valves are arranged along the height direction of the flue. In at least one group of adjacent exhaust valves, the angle between the second opening of the lower exhaust valve and the horizontal plane is greater than the angle between the second opening of the upper exhaust valve and the horizontal plane.

Images