Air outlet check valve
By designing an exhaust port check valve containing fusible pin and torsion spring mechanism, the valve cover is automatically locked and closed in the fire, solving the problem that the existing check valve cannot be locked, ensuring fire prevention and air resistance isolation effect.
Patent Information
- Application Number
- CN202420382872.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The existing exhaust air outlet check valve cannot be locked and closed automatically in the event of a fire, causing the fire to spread.
An exhaust check valve is designed including a seat ring, a tubular joint, a valve cover, a rotating shaft, a pressure plate and a fusible pin. When the fusible pin melts, the second torsion spring drives the pressure plate to press the valve cover to support the plate. The pressure plate locks the valve cover and closes it to prevent the fire from spreading.
Automatically lock and close the valve cover during a fire to prevent the fire from spreading further and ensure that indoor air does not enter countercurrently.
Smart Images
Figure CN222351522U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of exhaust products, in particular to an exhaust port check valve. Background Art
[0002] Exhaust vents are outlets for discharging air pollution, odor, moisture, etc. from inside a building to the outside through ventilation ducts or equipment. They are usually installed in humid and odor-prone places such as kitchens, bathrooms, and toilets. The function of exhaust vents is to circulate indoor air through the negative pressure principle to keep the indoor air fresh and comfortable.
[0003] At present, when range hoods, exhaust fans, etc. exhaust air to the outdoors through the exhaust port, in order to prevent the outside air from flowing back into the room, it is necessary to install a check valve on the exhaust port. The check valve is a valve device used to control the direction of indoor air flow. The current check valve will automatically open when exhausting, but in some special circumstances, such as when a fire occurs, the check valve cannot be automatically locked and closed. Utility Model Content
[0004] In order to automatically lock and close the check valve when a fire occurs, the utility model provides an exhaust port check valve in view of the problems of the prior art.
[0005] The utility model provides an exhaust port check valve, which adopts the following technical solution:
[0006] A check valve for an exhaust outlet comprises a seat ring and a tubular joint arranged on the seat ring, the inner wall of the joint being provided with a circle of convex edges, a valve cover being provided in the joint, the edge of the valve cover being sealingly fitted on the surface of the convex edges, a mounting plate being provided on the inner wall of the joint, a rotating shaft being rotatably provided on the mounting plate, a support plate being fixedly provided on the valve cover, an end of the support plate away from the valve cover being connected to the rotating shaft, a first elastic member for pressing the valve cover onto the convex edges being provided on the rotating shaft, an L-shaped pressing plate being provided on the rotating shaft, a support being provided on the seat ring, a fusible pin being connected between the pressing plate and the support, an elastic limiting assembly being provided on the support for driving the pressing plate to be pressed onto the surface of the valve cover and fixing the pressing plate, and when the fusible pin melts, the elastic limiting assembly drives the pressing plate to be pressed onto the valve cover.
[0007] Preferably, the first elastic member comprises a first torsion spring, one torsion arm of the first torsion spring abuts against the surface of the mounting plate, and the other torsion arm of the first torsion spring abuts against the surface of the valve cover.
[0008] Preferably, a concave block is provided on the mounting plate, and a torsion arm of the first torsion spring is embedded in the concave block.
[0009] Preferably, the elastic limiting assembly includes a rotating shaft rotatably set on the support, a support plate connected to the rotating shaft, and a second torsion spring sleeved on the rotating shaft, the support plate is located between the pressure plate and the mounting plate, one torsion arm of the second torsion spring abuts against the surface of the mounting plate, and the other torsion arm of the second torsion spring abuts against the surface of the support plate, when the fusible pin melts, the second torsion spring resets and drives the support plate to rotate, and the support plate drives the pressure plate to be pressed against the valve cover.
[0010] Preferably, a limiting plate is provided on the surface of the pressure plate, and when the pressure plate is pressed onto the surface of the valve cover, the free end of the support plate abuts against the limiting plate.
[0011] Preferably, a limiting groove is provided on the mounting plate, and an end portion of a torsion arm of the second torsion spring is located in the limiting groove.
[0012] Preferably, a circle is arranged at the edge of the seat ring, a gasket is arranged on the outer wall of the circle away from the seat ring, a foam sealing ring is arranged on the seat ring, and the foam sealing ring is located inside the circle.
[0013] Preferably, a silicone gasket is provided on the edge of the valve cover, an inner wall of the silicone gasket is provided with an insertion groove, the edge of the valve cover is inserted into the insertion groove, and a bending portion is provided on the outer side of the silicone gasket, and the bending portion is fitted with the convex edge.
[0014] Preferably, the fusible plug is a tin plug.
[0015] Preferably, third torsion springs are provided on opposite sides of the seat ring, one torsion arm of the third torsion spring is fixedly connected to the surface of the seat ring, and the other torsion arm of the third torsion spring extends out of the seat ring.
[0016] In summary, the present invention includes at least one of the following beneficial technical effects:
[0017] When a fire occurs, the fusible pins on the pressure plate and the support melt due to heat, so that the second torsion spring returns to press the pressure plate onto the valve cover. The support plate supports the pressure plate so that the valve cover is locked and closed, so that the valve cover will not open under the action of airflow, thereby preventing the fire from spreading further. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0019] Figure 2 It is a schematic diagram of the structure behind the hidden valve cover in the utility model.
[0020] Figure 3It is a schematic diagram of the assembly relationship between the valve cover and the silicone gasket in the utility model.
[0021] Figure 4 It is a structural schematic diagram of another viewing angle in the utility model.
[0022] Figure 5 It is a structural schematic diagram of the utility model in which the middle pressure plate and the support are connected together.
[0023] Figure 6 It is a cross-sectional schematic diagram of the utility model when the valve cover is closed.
[0024] Figure 7 It is a schematic diagram of the structure of the utility model after the valve cover is opened.
[0025] Figure 8 It is a cross-sectional schematic diagram of the utility model when the valve cover is opened.
[0026] Fig. 9 It is a schematic diagram of the structure of the utility model after the middle pressure plate is pressed onto the valve cover.
[0027] Fig.10 It is a cross-sectional schematic diagram of the utility model after the middle pressure plate is pressed onto the valve cover.
[0028] Fig.11 It is a structural schematic diagram of the support plate when it is supported on the pressure plate in the utility model.
[0029] In the figure: 1, seat ring; 11, surrounding ring; 12, gasket; 13, foam sealing ring; 14, third torsion spring; 2, joint; 21, convex edge; 3, valve cover; 31, support plate; 32, silicone gasket; 321, plug groove; 322, bending part; 4, mounting plate; 41, rotating shaft; 42, pressure plate; 421, limiting plate; 43, first torsion spring; 44, concave block; 45, limiting groove; 46, bolt; 5, support; 51, fusible plug; 52, rotating shaft; 53, support plate; 54, second torsion spring; 55, plug hole; DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0032] The utility model discloses an exhaust check valve. Figure 1-11 As shown, it includes a seat ring 1 and a tubular joint 2 arranged on the seat ring 1. The seat ring 1 is rectangular, and the four corners of the seat ring 1 are provided with rounded corners. The joint 2 is located in the middle of the seat ring 1, and the two ends of the joint 2 are through-set. One end of the joint 2 is connected to the surface of the seat ring 1, and the joint 2 and the seat ring 1 are integrally formed. When exhausting air, the exhaust pipe of the range hood or exhaust fan can be connected to the joint 2, and the air is discharged to the outside through the joint 2. The seat ring 1 and the joint 2 are made of stainless steel, which is not easy to rust and has a long service life.
[0033] In addition, a convex edge 21 is integrally formed on the inner wall of the end of the joint 2 away from the seat ring 1 in the circumferential direction. The convex edge 21 is arranged in a truncated cone shape. The large end of the convex edge 21 is connected to the end of the joint 2, and the small end of the convex edge 21 is located inside the joint 2. A valve cover 3 is arranged in the joint 2. The valve cover 3 is arranged in a round head shape, and a circle of protrusions extends outward from the edge of the valve cover 3. The protrusions on the edge of the valve cover 3 are sealed and fit on the surface of the small end of the convex edge 21. At the same time, a silicone gasket 32 is arranged on the edge of the valve cover 3. The inner wall of the silicone gasket 32 is provided with a plug-in groove 321 in the circumferential direction. The protrusions on the edge of the valve cover 3 are plugged into the plug-in groove 321. At the same time, a bending portion 322 is integrally formed on the outer side of the silicone gasket 32. The bending portion 322 fits with the surface of the convex edge 21 facing the inner wall of the joint 2. The silicone gasket 32 can improve the sealing performance of the valve cover 3 and the convex edge 21. At the same time, when the valve cover 3 hits the convex edge 21, the size of the impact sound can be reduced, which plays a buffering role. At the same time, a plurality of original reinforcing ribs are integrally formed on the surface of the valve cover 3. The reinforcing ribs can improve the strength of the valve cover 3, so that the valve cover 3 is not easy to deform. And the valve cover 3 is also made of stainless steel.
[0034] In addition, in order to enable the valve cover 3 to automatically open and close during air exhaust, a mounting plate 4 is provided on the inner wall of the joint 2. The mounting plate 4 is L-shaped, and a part of the mounting plate 4 is attached to the surface of the seat ring 1. Another part of the mounting plate 4 extends into the joint 2, and the mounting plate 4 and the seat ring 1 are fixedly connected together by two bolts 46. A rotating shaft 41 is rotatably provided on the mounting plate 4. The rotating shaft 41 is arranged perpendicular to the axis of the joint 2. The two opposite sides of the part of the mounting plate 4 extending into the joint 2 are bent towards the valve cover 3, and the two ends of the rotating shaft 41 movably penetrate through the bent parts of the two opposite sides of the mounting plate 4. At the same time, a support plate 31 is fixedly mounted on the surface of the valve cover 3背离于凸沿21的一侧表面上通过铆钉固定安装有支板31,支板31呈匚形设置,支板31远离阀盖3的两端端部与转轴41活动连接,转轴41活动贯穿于支板31的端部,当气流吹开阀盖3时,阀盖3上的支板31在转轴41上转动,从而使阀盖3转动打开。
[0035] In addition, a first elastic member for pressing the valve cover 3 onto the flange 21 is provided on the rotating shaft 41. Specifically, the first elastic member includes two first torsion springs 43 movably sleeved on the rotating shaft 41. One torsion arm of the two first torsion springs 43 is on the surface of the mounting plate 4, and the other torsion arms of the two first torsion springs 43 are connected together and abutted against the surface of the valve cover 3. When the air flow blows open the valve cover 3 and the valve cover 3 is in the open state, the first torsion spring 43 is in a twisted state. When the air flow stops, the first torsion spring 43 returns to press the valve cover 3 onto the flange 21 again, thus ensuring that the valve cover 3 is in the closed state when there is no air exhaust. In addition, a concave block 44 is integrally formed on the surface of the mounting plate 4, and one torsion arm of the first torsion spring 43 is fitted into the concave block 44, so that the torsion arm of the torsion spring is not prone to displacement.
[0036] In addition, an L-shaped pressing plate 42 is provided on the rotating shaft 41, one end of the pressing plate 42 is movably connected to the rotating shaft 41, and the rotating shaft 41 movably passes through the end of the pressing plate 42, and a support 5 is provided on the seat ring 1, and the support 5 is attached to the portion of the mounting plate 4 located on the seat ring 1, and the support 5 and the mounting plate 4 are fixedly installed on the seat ring 1 by two bolts 46, and a pin hole 55 is provided on the free end of the pressing plate 42 and the support 5. After the pressing plate 42 rotates toward the support 5 on the rotating shaft 41, the pin hole 55 on the pressing plate 42 is aligned with the pin hole 55 on the support 5, and a fusible pin 51 is inserted between the pressing plate 42 and the support 5, and the fusible pin 51 is inserted into the pin holes 55 on the pressing plate 42 and the support 5, and the fusible pin 51 is a tin pin, and the melting point of tin is 231.89°C, which is low in melting point and is easy to melt in a high temperature environment when a fire occurs. In addition, the support 5 is provided with an elastic limiting component for driving the pressure plate 42 to be pressed against the surface of the valve cover 3 and fixing the pressure plate 42. Specifically, the elastic limiting component includes a rotating shaft 52 arranged on the support 5, a supporting plate 53 connected to the rotating shaft 52, and a second torsion spring 54 movably sleeved on the rotating shaft 52. The rotating shaft 52 is arranged along the axial length direction parallel to the rotating shaft 41. Both ends of the rotating shaft 52 are rotatably supported on the side wall of the support 5. One end of the supporting plate 53 is movably sleeved on the rotating shaft 52. The supporting plate 53 is located between the pressure plate 42 and the mounting plate 4. One torsion arm of the second torsion spring 54 abuts against the surface of the mounting plate 4, and the other torsion arm of the second torsion spring 54 abuts against the surface of the supporting plate 53 facing the mounting plate 4. When the pressure plate 42 is connected to the support 5 When the fusible plug is connected together, the second torsion spring 54 is in a torsion state; when the fusible plug 51 melts, the second torsion spring 54 returns to drive the support plate 53 to rotate, and the support plate 53 rotates on the rotating shaft 52 to open the pressure plate 42, and the pressure plate 42 rotates on the rotating shaft 41 and is pressed against the valve cover 3. At the same time, the pressure plate 42 is integrally formed with the limiting plate 421 on the surface of the support plate 53. When the pressure plate 42 is pressed against the surface of the valve cover 3, the free end of the support plate 53 abuts on the limiting plate 421, so that the support plate 53 no longer rotates to support the pressure plate 42, and after the support plate 53 abuts on the limiting plate 421, the pressure plate 42 can be supported, and the pressure plate 42 presses the valve cover 3 so that the valve cover 3 will not open even if the airflow blows, thereby realizing the automatic locking and closing of the valve cover 3. In addition, the portion of the pressing plate 42 close to the rotating shaft 41 is hollowed out, so that when the pressing plate 42 is fixed to the support 5, the free end portion of the supporting plate 53 can be accommodated in the hollow portion of the pressing plate 42, thereby making the structure more compact. In addition, a limiting groove 45 is provided on the surface of the mounting plate 4 facing the supporting plate 53, and a portion of the torsion arm end of the second torsion spring 54 is located in the limiting groove 45, so that the torsion arm of the second torsion spring 54 is not easily displaced.
[0037] In addition, a circle 11 is integrally formed on the edge of the surface of the seat ring 1 away from the joint 2, and a gasket 12 is integrally formed on the outer wall of the circle 11 away from the seat ring 1. A foam sealing ring 13 is bonded and fixed to the surface of the seat ring 1 away from the joint 2. The foam sealing ring 13 is located inside the circle 11, and the foam sealing ring 13 can improve the overall sealing performance of the check valve. At the same time, the third torsion spring 14 is provided on both opposite sides of the seat ring 1. One torsion arm of the third torsion spring 14 is fixedly installed on the surface of the seat ring 1, and the other torsion arm of the third torsion spring 14 extends out of the seat ring 1. The operator can conveniently install the check valve on the exhaust port through the third torsion spring 14.
[0038] The implementation principle of the exhaust check valve in the embodiment of the utility model is as follows: when the pressure plate 42 and the support 5 are connected together by the fusible pin 51, when exhaust is needed, the airflow blows the valve cover 3 to open the valve cover 3, and the airflow is discharged to the outside through the interface. When the exhaust is stopped, the first torsion spring 43 returns to press the valve cover 3 onto the convex edge 21 of the interface again, so that the check valve is closed, thereby preventing the outside air from flowing back into the room. When a fire occurs, the pressure plate 42 and the fusible pin 51 on the support 5 are melted by heat, so that the second torsion spring 54 returns to press the pressure plate 42 onto the valve cover 3, and the support plate 53 supports the pressure plate 42 to lock and close the valve cover 3, so that the valve cover 3 will not open under the action of the airflow, thereby preventing the fire from spreading further.
[0039] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.
Claims
1. An exhaust check valve, characterized in that: The invention comprises a seat ring (1), a tubular joint (2) arranged on the seat ring (1), the inner wall of the joint (2) being provided with a circle of convex edges (21), a valve cover (3) being provided inside the joint (2), the edge of the valve cover (3) being sealingly attached to the surface of the convex edges (21), a mounting plate (4) being provided on the inner wall of the joint (2), a rotating shaft (41) being rotatably provided on the mounting plate (4), a support plate (31) being fixedly provided on the valve cover (3), the end of the support plate (31) being away from the valve cover (3) being connected to the rotating shaft (41), and the rotating shaft (41) A first elastic member is provided on the valve cover (3) for pressing the valve cover (3) onto the convex edge (21); an L-shaped pressing plate (42) is rotatably provided on the rotating shaft (41); a support (5) is provided on the seat ring (1); a fusible plug (51) is connected between the pressing plate (42) and the support (5); an elastic limiting component is provided on the support (5) for driving the pressing plate (42) to press onto the surface of the valve cover (3) and fixing the pressing plate (42); when the fusible plug (51) melts, the elastic limiting component drives the pressing plate (42) to press onto the valve cover (3).
2. The exhaust check valve according to claim 1, characterized in that: The first elastic member comprises a first torsion spring (43) sleeved on the rotating shaft (41), one torsion arm of the first torsion spring (43) abuts against the surface of the mounting plate (4), and the other torsion arm of the first torsion spring (43) abuts against the surface of the valve cover (3).
3. The exhaust port check valve according to claim 2, characterized in that: A concave block (44) is provided on the mounting plate (4), and a torsion arm of the first torsion spring (43) is embedded in the concave block (44).
4. The exhaust check valve according to claim 1, characterized in that: The elastic limiting assembly comprises a rotating shaft (52) rotatably arranged on the support (5), a support plate (53) connected to the rotating shaft (52), and a second torsion spring (54) sleeved on the rotating shaft (52), wherein the support plate (53) is located between the pressure plate (42) and the mounting plate (4), one torsion arm of the second torsion spring (54) abuts against the surface of the mounting plate (4), and the other torsion arm of the second torsion spring (54) abuts against the surface of the support plate (53), and when the fusible plug (51) melts, the second torsion spring (54) resets and drives the support plate (53) to rotate, and the support plate (53) drives the pressure plate (42) to be pressed onto the valve cover (3).
5. The exhaust port check valve according to claim 4, characterized in that: A limiting plate (421) is provided on the surface of the pressing plate (42), and when the pressing plate (42) is pressed onto the surface of the valve cover (3), the free end of the supporting plate (53) abuts against the limiting plate (421).
6. The exhaust check valve according to claim 4, characterized in that: A limiting groove (45) is provided on the mounting plate (4), and a torsion arm end portion of the second torsion spring (54) is located in the limiting groove (45).
7. The exhaust check valve according to claim 1, characterized in that: A circle (11) is arranged at the edge of the seat ring (1), a gasket (12) is arranged on the outer wall of the circle (11) away from the seat ring (1), a foam sealing ring (13) is arranged on the seat ring (1), and the foam sealing ring (13) is located inside the circle (11).
8. The exhaust check valve according to claim 1, characterized in that: The edge of the valve cover (3) is provided with a silicone gasket (32), the inner wall of the silicone gasket (32) is provided with an insertion groove (321), the edge of the valve cover (3) is inserted into the insertion groove (321), and the outer side of the silicone gasket (32) is provided with a bending portion (322), and the bending portion (322) is in contact with the convex edge (21).
9. The exhaust check valve according to claim 1, characterized in that: The fusible plug (51) is a tin plug.
10. The exhaust check valve according to claim 1, characterized in that: A third torsion spring (14) is provided on opposite sides of the seat ring (1), one torsion arm of the third torsion spring (14) is fixedly connected to the surface of the seat ring (1), and the other torsion arm of the third torsion spring (14) extends out of the seat ring (1).