Fireproof flue check valve

Abstract

The utility model belongs to the field of flue check valves, and particularly relates to a fireproof flue check valve which comprises a valve body, the valve body is provided with a smoke exhaust channel, and smoke absorbed by a range hood is exhausted from the smoke exhaust channel. The exhaust valve cover is rotationally connected to the valve body and covers the outlet of the smoke exhaust channel; the wax motor actuator is mounted in the valve body corresponding to the exhaust valve cover; when the wax motor actuator is started, the wax motor actuator drives the exhaust valve cover to execute an opening action; the wax motor actuator is adopted to assist the exhaust valve cover to execute the opening action, when the exhaust valve cover is adsorbed on the valve body due to oil stains, the ejector rod of the wax motor actuator ejects the exhaust valve cover open, wind resistance in the smoke exhaust channel is effectively reduced, and therefore it is guaranteed that the exhaust valve cover can be opened flexibly and reliably.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue check valves, and particularly relates to a fireproof flue check valve. Background Art

[0002] The flue check valve is also called a reflux valve, a non-return valve, a back pressure valve, a one-way valve, and a flue valve. This type of valve is automatically opened and closed by the force generated by the flow of the medium in the pipeline, and belongs to an automatic valve. It has been widely used in modern housing construction. In high-rise residential buildings, multiple households share a flue arranged from top to bottom. The exhaust pipes of the range hoods of each household are connected to this flue. When installing the exhaust pipe of the range hood, a flue fire check valve needs to be installed at the connection between the flue and the exhaust pipe. The flue fire check valve can reduce the backflow of the mixed oil fumes in the flue into the room. When a fire occurs in the flue, the flue fire check valve can reduce the spread of the fire in the flue into the room.

[0003] In the prior art, although most flue check valves can prevent the mixed oil fumes in the flue from flowing back into the room, after the flue check valve is used for a period of time, the oil stains in the oil fumes adhere to the exhaust valve cover, and the oil stains adsorb the exhaust valve cover to the valve body, resulting in unsmooth opening of the exhaust valve cover. In severe cases, the exhaust valve cover cannot be opened normally. For example, the automatic check valve for a flue with the patent number 201821622452.3 drives a rotating plate to rotate through a motor to close the flue. Although it can solve the problem of difficult flue closing, the disadvantages of the automatic check valve designed with this structure are as follows: First, the motor drive method is adopted, which has a large volume and high production cost. The motor works in the environment of smoke, high temperature, and high humidity in the flue check valve, and it cannot ensure reliable and stable operation, with a high failure rate, resulting in a short service life of the flue check valve. Second, when a fire occurs during the use of this automatic check valve, thick smoke will enter the room through the flue, posing a great safety hazard. Summary of the Invention

[0004] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and provide a fireproof flue check valve that can effectively solve the problem of difficult opening of the exhaust valve cover, prevent the outside fire from entering the room through the flue, can realize flexible and reliable opening of the exhaust valve cover, has a low failure rate, a small volume, low cost, and high safety.

[0005] To achieve the above object, the technical solution adopted by the present utility model is as follows: A fireproof flue check valve, comprising a valve body, the valve body having a smoke exhaust passage for discharging the smoke absorbed by the range hood from the smoke exhaust passage; an exhaust valve cover rotatably connected to the valve body and covering the outlet of the smoke exhaust passage; a wax motor actuator installed in the valve body corresponding to the exhaust valve cover; when the wax motor actuator is started, the wax motor actuator drives the exhaust valve cover to perform an opening action.

[0006] In some embodiments, it further includes a fusing member provided on the exhaust valve cover, and the wax motor actuator drives the exhaust valve cover to perform an opening action through the fusing member. When the fusing member reaches the fusing temperature, the fusing member fuses to release the driving cooperation relationship between the wax motor actuator and the exhaust valve cover.

[0007] In some embodiments, the wax motor actuator is driven by an electrical signal, and the power cord of the wax motor actuator is electrically connected to the power switch of the range hood. When the range hood is turned on, the wax motor actuator is started.

[0008] In some embodiments, the fusing member includes a fusing piece provided on the exhaust valve cover and a linkage plate provided on the fusing piece. When the wax motor actuator is started, the push rod of the wax motor actuator drives the exhaust valve cover to perform an opening action through the linkage plate and the fusing piece. When the fusing piece is heated to reach the fusing temperature, the fusing piece fuses to release the driving cooperation relationship between the wax motor actuator and the linkage plate.

[0009] In some embodiments, the fusing piece includes a connecting plate and a fixing plate. The connecting plate is provided on the exhaust valve cover, and the fixing plate is connected to the connecting plate and used for fixing the linkage plate. One end of the fixing plate has a welding portion spot-welded to the connecting plate, and the other end of the fixing plate has a fixing portion connected to the linkage plate.

[0010] In some embodiments, a receiving groove is provided on one side of the valve body corresponding to the outlet of the smoke exhaust passage. The wax motor actuator is installed in the receiving groove. One end of the linkage plate has a linkage portion extending outside the exhaust valve cover and cooperating with the wax motor actuator, and the linkage portion has a convex portion cooperating with the push rod of the wax motor actuator.

[0011] In some embodiments, the wax motor actuator is driven by a thermal signal. When the range hood is started, the temperature of the oil fume in the smoke exhaust passage melts the temperature-sensitive wax of the wax motor, and the wax motor actuator is started.

[0012] In some embodiments, the wax motor actuator is disposed in the smoke exhaust passage, and the fuse is disposed on the inner wall of the exhaust valve cover corresponding to the pull motor actuator. The fuse includes a fuse piece disposed on the inner wall of the exhaust valve cover and a linkage plate disposed on the fuse piece and cooperating with the wax motor actuator. A relief groove is disposed on the inner wall of the exhaust valve cover corresponding to the linkage plate. The ejector rod of the wax motor actuator drives the exhaust valve cover to perform an opening action through the linkage plate and the fuse piece. When the fuse piece reaches the fusing temperature, the fuse piece fuses, so that the ejector rod of the wax motor actuator is disengaged from the transmission cooperation relationship with the linkage plate.

[0013] In some embodiments, a magnetic member for attracting and closing the exhaust valve cover in a closed state is disposed at the outlet of the valve body corresponding to the smoke exhaust passage, and an attracting boss for attracting the magnetic member is disposed in the middle of the exhaust valve cover.

[0014] In some embodiments, a sealing ring is disposed on the outer periphery of the exhaust valve cover. When the exhaust valve cover is closed, the sealing ring covers the outlet of the valve body and forms a sealing fit between the sealing ring and the valve body.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The wax motor actuator is used to assist the exhaust valve cover to perform an opening action. When the exhaust valve cover is adsorbed on the valve body due to oil stains, the ejector rod of the wax motor actuator pushes open the exhaust valve cover, effectively reducing the wind resistance in the smoke exhaust passage, thereby ensuring that the exhaust valve cover can be opened flexibly and reliably. And compared with the prior art using a motor drive mode, the wax motor actuator has the advantages of small volume and low cost, and can meet the requirements of the compact design of the flue check valve. And the wax motor actuator can operate stably in harsh environments, is suitable for environments such as high temperature, high humidity, and smoke in the flue check valve, has a low failure rate, and high working reliability, thereby being beneficial to extending the service life of the flue check valve.

[0017] 2. The wax motor actuator drives the exhaust valve cover to perform an opening action through the fuse. When a fire occurs, the fuse is melted by high temperature, and the fuse is separated from the exhaust valve cover. At this time, the wax motor actuator cannot drive the exhaust valve cover through the fuse, and the exhaust valve cover remains in the closed state, which can effectively prevent thick smoke from entering the room through the smoke exhaust passage, and is beneficial to improving the safety of the flue check valve. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present invention.

[0019] Figure 1 Isometric view of Embodiment 1 of the present invention;

[0020] Figure 2 Exploded view of Embodiment 1 of the present invention;

[0021] Figure 3 Cross-sectional view of Embodiment 1 of the present invention;

[0022] Figure 4 Is Figure 3 Enlarged view of part A in

[0023] Figure 5 Internal structure diagram of Embodiment 2 of the present invention. Detailed implementation manners

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above drawings are intended to cover non-exclusive inclusion.

[0026] The directional and positional terms mentioned in the present invention, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only with reference to the directions or positions of the drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding the present invention and are not intended to limit the protection scope of the present invention.

[0027] The present invention will now be further described in conjunction with the drawings and specific implementation manners:

[0028] Embodiment 1:

[0029] This embodiment provides a fireproof flue check valve, as Figures 1 - 3As shown in the figure, it includes a valve body 10 which has a smoke exhaust passage 100 for discharging the smoke absorbed by the range hood from the smoke exhaust passage 100; an exhaust valve cover 11 which is rotatably connected to the valve body 10 and covers the outlet of the smoke exhaust passage 100; a wax motor actuator 12 which is installed in the valve body 10 corresponding to the exhaust valve cover 11. When the wax motor actuator 12 is started, the wax motor actuator 12 drives the exhaust valve cover 11 to perform an opening action. By using the wax motor actuator to assist the exhaust valve cover to perform the opening action, when the exhaust valve cover is adsorbed on the valve body due to oil stains, the ejector rod of the wax motor actuator pushes open the exhaust valve cover, effectively reducing the wind resistance in the smoke exhaust passage, so as to ensure that the exhaust valve cover can be opened flexibly and reliably. And compared with the existing motor drive method, the wax motor actuator has the advantages of small volume and low cost, and can meet the requirements of the compact design of the flue check valve. Moreover, the wax motor actuator can operate stably in harsh environments, is suitable for environments such as high temperature, high humidity, and smoke in the flue check valve, has a low failure rate and high working reliability, which is beneficial to extending the service life of the flue check valve. It also includes a fuse member 20 provided on the exhaust valve cover 11. The wax motor actuator 12 drives the exhaust valve cover 11 to perform an opening action through the fuse member 20. When the fuse member 20 reaches the fusing temperature, the fuse member 20 fuses to release the driving cooperation relationship between the wax motor actuator 12 and the exhaust valve cover 11. The wax motor actuator drives the exhaust valve cover to perform an opening action through the fuse member. When a fire occurs, the fuse member is melted by high temperature and separated from the exhaust valve cover. At this time, the wax motor actuator cannot drive the exhaust valve cover through the fuse member, and the exhaust valve cover remains in the closed state, which can effectively prevent thick smoke from entering the room through the smoke exhaust passage and is beneficial to improving the safety of the flue check valve.

[0030] As Figures 1 - 4As shown, the wax motor actuator 12 is driven by an electrical signal. The power cord of the wax motor actuator 12 is electrically connected to the power switch of the range hood. When the range hood is turned on, the wax motor actuator 12 starts. The wax motor actuator is driven by an electrical signal. When the range hood is turned on, the power supply of the wax motor actuator is connected, so that the wax motor actuator can start quickly. The wax motor actuator drives the exhaust valve cover to perform an opening action. The fuse member 20 includes a fuse piece 21 provided on the exhaust valve cover 11 and a linkage plate 22 provided on the fuse piece 21. When the wax motor actuator 12 starts, the ejector rod 121 of the wax motor actuator 12 drives the exhaust valve cover 11 to perform an opening action through the linkage plate 22 and the fuse piece 21. When the fuse piece 21 is heated to the fusing temperature, the fuse piece 21 melts, and the wax motor actuator 12 is disengaged from the transmission cooperation relationship with the linkage plate 22. The wax motor actuator drives the exhaust valve cover to perform an opening action through the linkage plate and the fuse piece, which can ensure that the exhaust valve cover can reliably perform the opening action. When a fire occurs in the flue, the fuse piece melts, the linkage plate is disconnected from the fuse piece, and the wax motor actuator cannot drive the exhaust valve cover to perform an opening action through the linkage plate. The exhaust valve cover remains in the closed state, which can effectively prevent thick smoke from entering the room through the smoke exhaust channel, and the safety is higher. The fuse piece 21 includes a connecting plate 211 and a fixing plate 212. The connecting plate 211 is provided on the exhaust valve cover 11, and the fixing plate 212 is connected to the connecting plate 211 and is used to fix the linkage plate 22. One end of the fixing plate 212 has a welding portion 2121 spot-welded to the connecting plate 211, and the other end of the fixing plate 212 has a fixing portion 2122 connected to the linkage plate 22. The connecting plate and the fixing plate are made of an alloy material, and the melting point temperature of the connecting plate and the fixing plate is 149.5° - 150.5°. The fixing plate and the connecting plate are connected by electric welding. When the temperature rises during a fire, the spot-welded area between the connecting piece and the fixing piece melts, so that the fixing plate and the connecting plate can be quickly melted and separated from each other, which is beneficial to improving the fusing reliability of the fuse piece. A receiving groove 101 is provided on one side of the valve body 10 corresponding to the outlet of the smoke exhaust channel 100. The wax motor actuator 12 is installed in the receiving groove 100. One end of the linkage plate 22 has a linkage portion 221 extending outside the exhaust valve cover 11 and cooperating with the wax motor actuator 12. The linkage portion 221 has a convex portion 222 cooperating with the ejector rod 121 of the wax motor actuator 12. The electrically driven wax motor actuator is arranged in the receiving groove on one side of the smoke exhaust channel, which can prevent the smoke in the smoke exhaust channel from affecting the stable and reliable operation of the wax motor actuator. Moreover, the ejector rod of the wax motor actuator drives the linkage plate through the convex portion, which can ensure the more reliable transmission between the wax motor actuator and the linkage plate.

[0031] As Figure 2 and 3As shown, a magnetic member 13 for attracting and closing the exhaust valve cover 11 is provided at the outlet of the smoke exhaust passage 100 corresponding to the valve body 10. An attracting boss 110 for attracting the magnetic member 13 is provided in the middle of the exhaust valve cover 11. The magnetic member can ensure that the exhaust valve cover is stably and reliably closed on the valve body, which is beneficial to improving the working reliability of the flue check valve. A sealing ring 14 is provided on the outer periphery of the exhaust valve cover 11. When the exhaust valve cover 11 is closed, the sealing ring 14 covers the outlet of the valve body 10, and a sealing fit between the sealing ring 14 and the valve body 10 is formed. The sealing ring can enhance the sealing performance between the exhaust valve cover and the valve body, the exhaust valve cover is closed more tightly, and the phenomenon of smoke leakage is reduced.

[0032] As Figure 2 shown, a rotating shaft 15 is provided at one side of the exhaust valve cover 11 corresponding to the valve body 10. A rotating frame 16 is linked to the exhaust valve cover 11. Both ends of the rotating shaft 15 are respectively inserted into two through holes 161 of the rotating frame 16, and a rotational connection fit between the rotating frame 16 and the rotating shaft 12 is formed. The exhaust valve cover is connected to the rotating shaft through the rotating frame, which is convenient for the assembly of the exhaust valve cover and the valve body, and the assembly efficiency is higher.

[0033] Embodiment 2:

[0034] This embodiment provides a fireproof flue check valve, as Figure 5As shown in the figure, the difference between this embodiment and Embodiment 1 is that the wax motor actuator 12 is driven by a thermal signal. When the range hood is started, the temperature of the oil fume in the smoke exhaust passage 100 melts the temperature-sensitive wax of the pull motor 12, and the wax motor actuator 12 is started. The melting point of the temperature-sensitive wax can be matched according to the use environment. The wax motor actuator driven by a thermal signal does not require a power source, and the cost is lower. The wax motor actuator 12 is arranged in the smoke exhaust passage 100, and the fuse 20 is arranged on the inner wall of the exhaust valve cover 11 corresponding to the pull motor actuator 12. The fuse 20 includes a fuse piece 21 arranged on the inner wall of the exhaust valve cover 11 and a linkage plate 22 arranged on the fuse piece 21 and cooperating with the wax motor actuator 12. A relief groove 111 is arranged on the inner wall of the exhaust valve cover 11 corresponding to the linkage plate 22. The ejector rod 121 of the wax motor actuator 12 drives the exhaust valve cover 11 to perform an opening action through the linkage plate 22 and the fuse piece 21. When the fuse piece 21 reaches the fusing temperature, the fuse piece 21 fuses, so that the ejector rod 121 of the wax motor actuator 12 is disengaged from the transmission cooperation relationship with the linkage plate 22. By arranging the wax motor actuator driven by a thermal signal in the smoke exhaust passage, the temperature-sensitive wax of the wax motor actuator can directly contact the oil fume in the smoke exhaust passage, and the temperature of the oil fume melts the temperature-sensitive wax, so that the wax motor actuator driven by a thermal signal can be started quickly. The ejector rod of the wax motor actuator drives the exhaust valve cover to perform an opening action through the linkage plate and the fuse piece. When a fire occurs in the flue, the fuse piece fuses, the linkage plate is disconnected from the fuse piece, and the ejector rod of the wax motor actuator pops out in the relief groove of the exhaust valve cover, so that the wax motor actuator cannot drive the exhaust valve cover to perform an opening action through the linkage plate, effectively preventing thick smoke from entering the room through the smoke exhaust passage, and the safety is higher.

[0035] The above is only one embodiment of the present invention and is not used to limit the protection scope of the present invention; the protection scope of the present invention is defined by the claims in the claims, and all equivalent changes and modifications made according to the present invention are within the protection scope of the present invention patent.

Claims

1. A fire-proof flue check valve, characterized in that: It includes a valve body, which has a smoke exhaust channel so that the smoke absorbed by the range hood is discharged from the smoke exhaust channel; an exhaust valve cover, which is rotatably connected to the valve body and covers the outlet of the smoke exhaust channel; a wax motor actuator, which is installed in the valve body corresponding to the exhaust valve cover; when the wax motor actuator is started, the wax motor actuator drives the exhaust valve cover to open.

2. The fireproof flue check valve according to claim 1, characterized in that: It also includes a fuse arranged on the exhaust valve cover. The wax motor actuator drives the exhaust valve cover to open through the fuse. When the fuse reaches the melting temperature, the fuse melts to release the transmission matching relationship between the wax motor actuator and the exhaust valve cover.

3. The fireproof flue check valve according to claim 2, characterized in that: The wax motor actuator is driven by an electrical signal, and a power line of the wax motor actuator is electrically connected to a power switch of the range hood. When the range hood is turned on, the wax motor actuator is started.

4. The fireproof flue check valve according to claim 3, characterized in that: The fuse comprises a fuse piece arranged on the exhaust valve cover and a linkage plate arranged on the fuse piece. When the wax motor actuator is started, the push rod of the wax motor actuator is driven through the linkage plate and the fuse piece to open the exhaust valve cover. When the fuse piece is heated to the melting temperature, the fuse piece melts to release the transmission cooperation relationship between the wax motor actuator and the linkage plate.

5. The fireproof flue check valve according to claim 4, characterized in that: The fuse piece includes a connecting plate and a fixing plate. The connecting plate is arranged on the exhaust valve cover. The fixing plate is connected to the connecting plate and is used to fix the linkage plate. One end of the fixing plate has a welding portion spot-welded to the connecting plate, and the other end of the fixing plate has a fixing portion connected to the linkage plate.

6. The fireproof flue check valve according to claim 4 or 5, characterized in that: A accommodating groove is provided in the valve body at one side of the outlet of the smoke exhaust channel, and the wax motor actuator is installed in the accommodating groove. One end of the linkage plate has a linkage part extending outside the exhaust valve cover and cooperating with the wax motor actuator, and the linkage part has a boss part cooperating with the top rod of the wax motor actuator.

7. The fireproof flue check valve according to claim 2, characterized in that: The wax motor actuator is driven by a heat signal. When the range hood is started, the temperature of the oil smoke in the exhaust passage causes the temperature-sensitive wax of the motor to melt, and the wax motor actuator is started.

8. The fireproof flue check valve according to claim 7, characterized in that: The wax motor actuator is arranged in the smoke exhaust channel, and the fuse is arranged on the inner wall of the exhaust valve cover corresponding to the motor actuator. The fuse includes a fuse piece corresponding to the inner wall of the exhaust valve cover, and a linkage plate arranged on the fuse piece and matched with the wax motor actuator. A yield groove is arranged on the inner wall of the exhaust valve cover corresponding to the linkage plate. The top rod of the wax motor actuator is driven by the linkage plate and the fuse piece to open the exhaust valve cover. When the fuse piece reaches the melting temperature, the fuse piece melts to release the transmission matching relationship between the top rod of the wax motor actuator and the linkage plate.

9. The fireproof flue check valve according to claim 1 or 2, characterized in that: A magnetic piece for sucking the exhaust valve cover into a closed state is arranged at the outlet of the smoke exhaust passage in the valve body, and a suction boss sucked with the magnetic piece is arranged in the middle of the exhaust valve cover.

10. The fireproof flue check valve according to claim 1 or 2, characterized in that: A sealing ring is arranged on the outer periphery of the exhaust valve cover. When the exhaust valve cover is closed, the sealing ring covers the outlet of the valve body and forms a sealing fit between the sealing ring and the valve body.

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