Improved locking device for flue check valve

Abstract

The utility model relates to the technical field of flue check valves, in particular to an improved locking device for a flue check valve, which comprises a shell, a valve plate is movably connected to the surface of the shell, a support is fixedly connected to the surface of the shell, and a limit frame is fixedly connected to the surface of the valve plate. According to the utility model, through the movable connection between the first rotating shaft and the limiting hook, the sleeving connection between the first rotating shaft and the first torsion spring, the fixed connection between the limiting hook and the clamping plate, the movable connection between the clamping plate and the first locking and pressing plate, the insertion connection between the first locking and pressing plate and the first fixing member, and the fixed connection between the first fixing member and the first fusing member, when a fire disaster occurs and the temperature is high, the first fusing member can fuse; when the flue check valve is used, the first fusing piece is fused at high temperature, abutting limitation on the limiting hook can be relieved, the limiting hook is driven by the first torsional spring to rotate to clamp the limiting frame, then the valve plate is pulled and limited, the flue check valve is locked, the fire behavior is controlled, potential safety hazards are reduced, and it is guaranteed that the flue check valve can reach the optimal state in the using scene.

Description

Technical Field

[0001] The utility model relates to the technical field of flue check valves, and particularly to an improved locking device for a flue check valve. Background Technique

[0002] A flue check valve is also called a one-way valve. This type of valve is automatically opened and closed by the force generated by the flow of media such as air flow and oil fume in the pipeline. Its main function is to prevent the reverse flow of media such as air flow and oil fume.

[0003] At present, many families in high-rise buildings share the same common flue. The exhaust pipe of the household range hood is connected to the common flue. The flue check valve includes a housing with an exhaust passage and a valve plate rotatably connected to the housing. The exhaust pipe of the range hood is connected to the common flue through the housing, so that the indoor oil fume of the household sequentially passes through the exhaust pipe of the range hood and the exhaust passage in the housing and is discharged into the common flue. However, when a fire occurs, the flue check valve that should normally be in a closed state is easily opened under the impact of internal air flow, etc., and then the common flue is connected to the indoor air flow of the user, causing the spread of the fire, thus there are safety hazards. Content of the Utility Model

[0004] The purpose of the utility model is to provide an improved locking device for a flue check valve to solve the problem that when a fire occurs, the flue check valve that should normally be in a closed state is easily opened under the impact of internal air flow, etc., and then the common flue is connected to the indoor air flow of the user, causing the spread of the fire, thus there are safety hazards as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An improved locking device for a flue check valve includes a housing. A valve plate is movably connected to the surface of the housing. A bracket is fixedly connected to the surface of the housing. A limiting frame is fixedly connected to the surface of the valve plate. A mounting block is fixedly connected to the inner surface of the housing. A first rotating shaft is fixedly connected to the surface of the mounting block. A limiting hook is movably connected to the surface of the first rotating shaft. A first torsion spring is sleeved on the surface of the first rotating shaft. A clamping plate is fixedly connected to the surface of the limiting hook. A first locking pressure plate is movably connected to the surface of the clamping plate. A first fixing member is inserted and connected to the surface of the first locking pressure plate. A first fusing member is fixedly connected to the surface of the first fixing member. A fixing plate is fixedly connected to the surface of the first fixing member. A second rotating shaft is movably connected to the surface of the fixing plate. A resisting rod is movably connected to the surface of the bracket. A second torsion spring is sleeved on the surface of the resisting rod. A second locking pressure plate is movably connected to the surface of the resisting rod. A second fixing member is inserted and connected to the surface of the second locking pressure plate. A second fusing member is fixedly connected to the surface of the second fixing member.

[0006] Preferably, the valve plate is rotatably connected to the housing, and the housing is in a through state.

[0007] Preferably, the limiting frame is movably connected to the mounting block through the valve plate, and the limiting hook is rotatably connected to the mounting block through the first rotating shaft.

[0008] Preferably, both ends of the first torsion spring are fixedly connected to the first rotating shaft and the limiting hook respectively, and the clamping plate is in a plate shape.

[0009] Preferably, the clamping plate is movably connected to the mounting block through the limiting hook, and the first locking pressure plate and the fixing plate are rotatably connected to the mounting block through the second rotating shaft.

[0010] Preferably, the second rotating shaft is in a round rod shape, the second rotating shaft penetrates through the fixing plate, and the second rotating shaft is fixedly connected to the mounting block.

[0011] Preferably, both ends of the second torsion spring are fixedly connected to the bracket and the abutting rod respectively, and the abutting rod is rotatably connected to the bracket through the second torsion spring.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. Through the fixed connection between the valve plate and the limiting frame, the fixed connection between the mounting block and the first rotating shaft, the movable connection between the first rotating shaft and the limiting hook, the sleeving connection between the first rotating shaft and the first torsion spring, the fixed connection between the limiting hook and the clamping plate, the movable connection between the clamping plate and the first locking pressure plate, the insertion connection between the first locking pressure plate and the first fixing member, the fixed connection between the first fixing member and the first fusing member, the fixed connection between the first fixing member and the fixing plate, and the movable connection between the fixing plate and the second rotating shaft. When a fire occurs and the temperature is high, the first fusing member is melted by the high temperature, so that the first locking pressure plate is driven by the clamping plate to deflect, separating the clamping plate from the first locking pressure plate, thereby releasing the restraint on the limiting hook. The limiting hook rotates under the drive of the first torsion spring to catch the limiting frame, and then pulls and limits the valve plate, locking the flue check valve and cutting off the connection between the external and internal airflows. The flue check valve is reset in time, thereby controlling the fire and reducing potential safety hazards, ensuring that the flue check valve can reach the best state in the usage scenario.

[0014] 2. Through the movable connection between the bracket and the abutting rod, the sleeving of the abutting rod and the second torsion spring, the movable connection between the abutting rod and the second locking pressure plate, the insertion connection between the second locking pressure plate and the second fixing member, and the fixed connection between the second fixing member and the second fusing member, when a fire occurs and the temperature is high, the second fusing member is melted by the high temperature, causing the second locking pressure plate to deflect driven by the abutting rod, separating the abutting rod from the second locking pressure plate, thereby releasing the restriction on the abutting of the abutting rod. The abutting rod rotates under the drive of the second torsion spring to abut against the valve plate, further limiting the valve plate, locking the flue check valve, cutting off the connection between the outside and the inside airflows, and enabling the flue check valve to reset in a timely manner, thereby controlling the fire, reducing potential safety hazards, and ensuring that the flue check valve can reach the optimal state in the usage scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front three-dimensional structure schematic diagram of the present utility model;

[0016] Figure 2 is the top three-dimensional structure schematic diagram of the present utility model;

[0017] Figure 3 is the three-dimensional partial sectional structure schematic diagram of the flue check valve of the present utility model;

[0018] Figure 4 is of the present utility model Figure 3 the enlarged structure schematic diagram of part A therein;

[0019] Figure 5 is the three-dimensional partial structure schematic diagram of the abutting rod of the present utility model;

[0020] Figure 6 is of the present utility model Figure 5 the enlarged structure schematic diagram of part B therein.

[0021] In the figure: 1. Outer shell; 2. Valve plate; 3. Bracket; 4. Limiting frame; 5. Mounting block; 6. First rotating shaft; 7. Limiting hook; 8. First torsion spring; 9. Clamping plate; 10. First locking pressure plate; 11. First fixing member; 12. First fusing member; 13. Fixed plate; 14. Second rotating shaft; 15. Abutting rod; 16. Second torsion spring; 17. Second locking pressure plate; 18. Second fixing member; 19. Second fusing member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-6 , an embodiment provided by the present utility model:

[0024] An improved locking device for a flue check valve comprises a shell 1, wherein the middle of the shell 1 is a channel for the circulation of airflow, oil smoke and other media, a valve plate 2 is movably connected to the surface of the shell 1, and the valve plate 2 is used to open and close the channel to prevent the backflow of airflow, oil smoke and other media, a bracket 3 is fixedly connected to the surface of the shell 1, and the bracket 3 is used for installing a stop rod 15, a second torsion spring 16, a second locking plate 17, a second fixing member 18 and a second fuse 19, a limiting frame 4 is fixedly connected to the surface of the valve plate 2, a mounting block 5 is fixedly connected to the inner surface of the shell 1, and the mounting block 5 is used to install the locking device, a first rotating shaft 6 is fixedly connected to the surface of the mounting block 5, and the first rotating shaft 6 is used to realize the rotation of the limiting hook 7, and the surface of the first rotating shaft 6 is movably connected to The limiting hook 7, the limiting frame 4 and the limiting hook 7 work together. The limiting hook 7 is hooked on the limiting frame 4 to limit the limiting frame 4, thereby realizing the limiting of the valve plate 2, and then realizing the locking effect of the locking device. The surface of the first rotating shaft 6 is sleeved with a first torsion spring 8, and the first torsion spring 8 is used to drive the limiting hook 7 to rotate, so that the limiting hook 7 is hooked and stuck on the limiting frame 4. The surface of the limiting hook 7 is fixedly connected with a clamping plate 9, and the surface of the clamping plate 9 is movably connected with a first locking plate 10. The clamping plate 9 and the first locking plate 10 work together to realize the clamping and limiting of the limiting hook 7. The surface of the first locking plate 10 is plugged and connected with a first fixing member 11. The first fixing member 11 is used to fix the first locking plate 10 on the fixing plate 13. The first fixing member The surface of the component 11 is fixedly connected with a first fuse 12, which will melt at high temperature, so that the first locking plate 10 will be driven by the card plate 9 to deflect, so that the card plate 9 is separated from the first locking plate 10, thereby releasing the resistance restriction on the limit hook 7; the surface of the first fixing component 11 is fixedly connected with a fixing plate 13, and the fixing plate 13 will be forced to rotate after the first locking plate 10 is driven by the card plate 9 to deflect, driving the first locking plate 10 and the card plate 9 to separate, thereby releasing the resistance restriction on the limit hook 7; the surface of the fixing plate 13 is movably connected with a second rotating shaft 14, and the second rotating shaft 14 is used to realize the rotation of the fixing plate 13; the surface of the bracket 3 is movably connected with a push rod 15, and the push rod 15 is used to push against the valve plate 2 to rotate the valve plate 2 The second torsion spring 16 is sleeved on the surface of the push rod 15, and the second torsion spring 16 is used to drive the push rod 15 to rotate so that the push rod 15 presses against the valve plate 2. The surface of the push rod 15 is movably connected with a second locking plate 17, and the second locking plate 17 is used to achieve the clamping limit of the push rod 15. The surface of the second locking plate 17 is plug-connected with a second fixing member 18, and the second fixing member 18 is used to fix the second locking plate 17 on the bracket 3. The surface of the second fixing member 18 is fixedly connected with a second fuse 19, and the second fuse 19 will melt at high temperature, so that the second locking plate 17 will be driven by the push rod 15 to deflect, so that the second locking plate 17 is separated from the push rod 15, thereby releasing the abutment restriction on the push rod 15.

[0025] Furthermore, the valve plate 2 is rotatably connected to the shell 1, and the valve plate 2 is used to open and close this channel to prevent the backflow of airflow, oil smoke and other media. The shell 1 is in a through state, and the middle of the shell 1 is a channel for the circulation of airflow, oil smoke and other media. The bracket 3 is used for the installation of the support rod 15, the second torsion spring 16, the second locking plate 17, the second fixing member 18 and the second fuse 19.

[0026] Furthermore, the limit frame 4 is movably connected to the mounting block 5 through the valve plate 2, the mounting block 5 is used to install the locking device, the first rotating shaft 6 is used to realize the rotation of the limit hook 7, the limit hook 7 is rotatably connected to the mounting block 5 through the first rotating shaft 6, the limit frame 4 and the limit hook 7 cooperate with each other, the limit hook 7 is hooked on the limit frame 4 to limit the limit frame 4, thereby realizing the limitation of the valve plate 2, and then realizing the locking effect of the locking device.

[0027] Furthermore, the two ends of the first torsion spring 8 are fixedly connected to the first rotating shaft 6 and the limit hook 7 respectively. The first torsion spring 8 is used to drive the limit hook 7 to rotate, so that the limit hook 7 is hooked and clamped on the limit frame 4. The clamping plate 9 is plate-shaped, and the clamping plate 9 and the first locking plate 10 work together to achieve the clamping and limiting of the limit hook 7.

[0028] Furthermore, the card plate 9 is movably connected to the mounting block 5 via the limit hook 7, the first locking plate 10 and the fixed plate 13 are rotatably connected to the mounting block 5 via the second rotating shaft 14, the first fixing member 11 is used to fix the first locking plate 10 on the fixed plate 13, the first fuse 12 will melt at high temperature, so that the first locking plate 10 will be driven by the card plate 9 to deflect, so that the card plate 9 is separated from the first locking plate 10, thereby releasing the restriction on the limit hook 7.

[0029] Furthermore, after the first locking plate 10 is driven by the clamping plate 9 to deflect, the fixed plate 13 will be forced to rotate, driving the first locking plate 10 and the clamping plate 9 to separate, thereby releasing the resistance restriction on the limit hook 7. The second rotating shaft 14 is in the shape of a round rod, and the second rotating shaft 14 passes through the fixed plate 13. The second rotating shaft 14 is fixedly connected to the mounting block 5, and the second rotating shaft 14 is used to realize the rotation of the fixed plate 13.

[0030] Furthermore, the push rod 15 is used to push against the valve plate 2 to limit the valve plate 2 and lock the flue check valve. The two ends of the second torsion spring 16 are fixedly connected to the bracket 3 and the push rod 15 respectively. The second torsion spring 16 is used to drive the push rod 15 to rotate so that the push rod 15 pushes against the valve plate 2. The push rod 15 is rotatably connected to the bracket 3 through the second torsion spring 16. The second locking plate 17 is used to achieve the clamping and limiting of the push rod 15. The second fixing member 18 is used to fix the second locking plate 17 on the bracket 3. The second fuse 19 will melt at high temperature, so that the second locking plate 17 will be driven by the push rod 15 to deflect, so that the second locking plate 17 is separated from the push rod 15, thereby releasing the resistance restriction on the push rod 15.

[0031] Working principle: When the flue check valve is working normally, the first fuse piece 12 and the second fuse piece 19 will not blow. At this time, under the action of the first locking pressure plate 10 and the second locking pressure plate 17, the first locking pressure plate 10 is clamped with the clamping plate 9 and the abutting rod 15 is clamped with the second locking pressure plate 17. The limiting hook 7 and the abutting rod 15 will not limit the valve piece 2 on the flue check valve under the pulling of the first torsion spring 8 and the second torsion spring 16. When a fire occurs and the temperature is high, the first fuse piece 12 is melted by the high temperature, causing the first locking pressure plate 10 to deflect driven by the clamping plate 9. The fixing plate 13 will rotate to drive the first locking pressure plate 10 to separate the clamping plate 9 from the first locking pressure plate 10, thereby releasing the restraint on the limiting hook 7. The limiting hook 7 rotates under the driving of the first torsion spring 8 to clamp the limiting frame 4, and then pulls and limits the valve piece 2, locking the flue check valve and cutting off the connection between the external and internal airflows. The flue check valve is reset in time, thereby controlling the fire.

[0032] When a fire occurs and the temperature is high, the second fuse piece 19 is melted by the high temperature, causing the second locking pressure plate 17 to deflect driven by the abutting rod 15, separating the abutting rod 15 from the second locking pressure plate 17, thereby releasing the restraint on the abutting rod 15. The abutting rod 15 rotates under the driving of the second torsion spring 16 to abut against the valve piece 2, and then abuts and limits the valve piece 2, locking the flue check valve and cutting off the connection between the external and internal airflows. The flue check valve is reset in time, thereby controlling the fire.

[0033] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An improved locking device for a flue check valve, comprising a housing (1), characterized in that: The surface of the shell (1) is movably connected to the valve plate (2), the surface of the shell (1) is fixedly connected to the bracket (3), the surface of the valve plate (2) is fixedly connected to the limiting bracket (4), the inner surface of the shell (1) is fixedly connected to the mounting block (5), the surface of the mounting block (5) is fixedly connected to the first rotating shaft (6), the surface of the first rotating shaft (6) is movably connected to the limiting hook (7), the surface of the first rotating shaft (6) is sleeved with a first torsion spring (8), the surface of the limiting hook (7) is fixedly connected to a clamping plate (9), the surface of the clamping plate (9) is movably connected to a first locking plate (10), and the surface of the first locking plate (10) is plug-in connected to the first rotating shaft (6). A first fixing member (11) is connected, the surface of the first fixing member (11) is fixedly connected to a first fuse (12), the surface of the first fixing member (11) is fixedly connected to a fixing plate (13), the surface of the fixing plate (13) is movably connected to a second rotating shaft (14), the surface of the bracket (3) is movably connected to a push rod (15), the surface of the push rod (15) is sleeved with a second torsion spring (16), the surface of the push rod (15) is movably connected to a second locking plate (17), the surface of the second locking plate (17) is plug-connected to a second fixing member (18), and the surface of the second fixing member (18) is fixedly connected to a second fuse (19).

2. An improved locking device for a flue check valve according to claim 1, characterized in that: The valve plate (2) and the outer shell (1) are rotatably connected, and the outer shell (1) is in a through state.

3. The improved locking device for flue check valve according to claim 1, characterized in that: The limiting frame (4) is movably connected to the mounting block (5) via the valve plate (2), and the limiting hook (7) is rotatably connected to the mounting block (5) via the first rotating shaft (6).

4. The improved locking device for a flue check valve according to claim 1, characterized in that: The two ends of the first torsion spring (8) are respectively fixedly connected to the first rotating shaft (6) and the limiting hook (7), and the clamping plate (9) is in a plate shape.

5. The improved locking device for flue check valve according to claim 1, characterized in that: The clamping plate (9) is movably connected to the mounting block (5) via a limiting hook (7), and the first locking plate (10) and the fixing plate (13) are rotatably connected to the mounting block (5) via a second rotating shaft (14).

6. The improved locking device for flue check valve according to claim 1, characterized in that: The second rotating shaft (14) is in the shape of a round rod, the second rotating shaft (14) passes through the fixing plate (13), and the second rotating shaft (14) is fixedly connected to the mounting block (5).

7. An improved locking device for a flue check valve according to claim 1, characterized in that: The two ends of the second torsion spring (16) are respectively fixedly connected to the bracket (3) and the support rod (15), and the support rod (15) is rotatably connected to the bracket (3) via the second torsion spring (16).

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