Fireproof check valve

Abstract

The utility model provides a fireproof check valve. The fireproof check valve comprises a mounting seat, a valve seat, a valve plate, a limiting piece and a hot melting structure. And the valve seat is mounted in the mounting seat and is provided with a smoke outlet. The valve plate is installed in the installation base in an overturning mode, and the smoke outlet is sealed and covered through gravity or a reset mechanism, so that a one-way structure is formed. And the limiting piece is mounted in the mounting seat or the valve seat and is positioned between the valve plate and the smoke exhaust pipeline. The hot melting structure is installed close to the limiting piece and limits the limiting piece and the valve block to be staggered. The hot melting structure is melted or softened at the preset temperature, the limiting effect on the limiting piece is relieved, and the limiting piece moves to the back face of the valve block under the action of deformation recovery, self weight or external force action mechanisms and abuts against the valve block. According to the check valve provided by the utility model, the limiting effect on the limiting piece can be relieved under the condition that a fire disaster occurs, and the limiting piece abuts against the valve plate, so that smoke can be prevented from gushing out of the smoke outlet, and the check effect and the safety of the check valve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a fireproof check valve. Background Art

[0002] The exhaust pipe of the range hood is generally connected to the smoke exhaust duct of the building through a check valve. The check valve has a one-way function to prevent oil smoke from leaking into the room through the smoke exhaust duct. However, the existing check valves are often not firmly closed. Especially in the event of a fire, a large amount of smoke will rush into the room through the smoke exhaust duct, posing a risk of suffocation to the occupants. For this reason, the utility model provides a check valve structure that can automatically lock the valve in the event of a fire, so as to solve the above technical problems. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a check valve structure with high safety.

[0004] A fireproof check valve is installed at the air inlet of a smoke exhaust pipe and comprises a mounting seat, a valve seat, a valve plate, a limiter and a hot-melt structure.

[0005] The valve seat is installed in the mounting seat and is provided with a smoke exhaust port for smoke to enter the smoke exhaust pipe.

[0006] The valve plate is turned over and installed in the mounting seat, and the smoke exhaust port is sealed by gravity or a reset mechanism to form a one-way structure to prevent smoke from leaking out.

[0007] The limiting member is installed in the mounting seat or the valve seat and is located between the valve plate and the smoke exhaust pipe.

[0008] The hot melt structure is installed close to the limiter and limits the limiter to be offset from the valve plate. The hot melt structure melts or softens at a preset temperature, thereby releasing the limiter's limit effect. The limiter moves to the back of the valve plate under the action of restoring deformation, self-weight or external force mechanism in an unrestricted state, and presses the valve plate on the smoke exhaust port.

[0009] The check valve provided in the utility model has a limit piece and a hot melt structure, which do not work under normal conditions, and the limit piece and the valve plate are staggered. In the event of a fire, when the temperature in the smoke exhaust duct rises and is filled with smoke, the hot melt structure is heated and melts or softens at a preset temperature, thereby releasing the restricting effect of the limit piece, and the limit piece can be switched to a state of supporting the valve plate, thereby preventing smoke from gushing out of the smoke exhaust port, thereby improving the non-return effect and safety of the check valve in a fire scenario.

[0010] Preferably, there are two groups of the limiter and the hot-melt structure, which are symmetrically arranged on both sides of the valve plate, so as to provide a uniform pressing force for the valve plate and improve the sealing degree between the valve plate and the smoke exhaust port.

[0011] Preferably, one end of the limit member is rotatably mounted in the mounting seat, and the other end is swung away from the valve plate position or against the valve plate position.

[0012] Preferably, the position away from the valve plate is higher than the position against the valve plate, and the limit member swings from the position away from the valve plate to the position against the valve plate by its own weight after the restriction is released. The structure is simple and no additional external force driving structure is required.

[0013] Preferably, a mounting ear with a hinge hole is provided in the mounting seat, and the limiter is rotatably mounted on the hinge hole of the mounting ear. A baffle is provided at the end of the mounting ear, and the baffle limits the minimum angle of the limiter to swing downward, so as to prevent the limiter from being staggered with the limiter after swinging downward.

[0014] Preferably, the hot melt structure is a hot melt column with a simple structure. It is installed on the mounting ear and limits the position of the limit member to a position away from the valve plate.

[0015] Preferably, the limiter is a U-shaped metal rib, which has a high deadweight and is resistant to high temperatures. One end of the limiter is inserted into the hinge hole of the mounting ear, and the end sleeve is provided with a torsion spring, one end of the torsion spring is clamped on the mounting ear, and the other end hooks the limiter, providing elastic force for the limiter to swing to a position against the valve plate, thereby preventing the limiter from being unable to reset or being stuck under the action of its own weight, and at the same time, further improving the sensitivity of the limiter to reset.

[0016] Preferably, a docking port is provided at one end of the mounting seat facing outwards, and a detachable reducing ring is sleeved on the outer periphery of the docking port, so that the mounting seat can dock with smoke exhaust pipes of more sizes.

[0017] Preferably, a fixing seat is provided at the periphery of one end of the mounting seat facing the air inlet of the smoke exhaust duct, and strip-shaped mounting holes are provided around the fixing seat to improve the installation flexibility of the mounting seat.

[0018] Preferably, the valve plate is flipped and installed in the mounting seat by means of a hinge, and the hinge, the valve plate and the mounting seat are fixed by rivets, so that the installation is firm.

[0019] Preferably, a spring is provided inside the hinge for opening the hinge.

[0020] From the above description of the utility model, it can be seen that the utility model has the following beneficial effects:

[0021] The check valve provided in the utility model has a limiter and a hot melt structure, which does not work in a normal state, and the limiter and the valve plate are staggered. In the event of a fire, when the temperature in the smoke exhaust pipe rises and is filled with smoke, the hot melt structure is heated and melts or softens at a preset temperature, thereby releasing the limiting effect on the limiter, and the limiter can be switched to a state of supporting the valve plate, which can prevent smoke from gushing out of the smoke exhaust port, thereby improving the check valve's non-return effect and safety in a fire scenario;

[0022] Two sets of limiters and hot-melt structures are provided to provide uniform pressing force for the valve plate, thereby improving the sealing degree between the valve plate and the smoke exhaust port;

[0023] The limiter is additionally provided with a torsion spring on the basis of its own weight, thereby preventing the limiter from being unable to reset or being stuck under the action of its own weight, and at the same time, further improving the sensitivity of the reset of the limiter;

[0024] A detachable reducing ring is sleeved on the outer periphery of the docking port of the mounting seat, so that the mounting seat can dock with smoke exhaust pipes of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] in:

[0027] Figure 1 A fire check valve is a side view of the shaft Figure 1 ;

[0028] Figure 2 A fire check valve is a side view of the shaft Figure 2 ;

[0029] Figure 3 Is a fire check valve explosion Figure 1 ;

[0030] Figure 4 Is a fire check valve explosion Figure 2 ;

[0031] Figure 5 It is a front view of a fire check valve;

[0032] Figure 6 It is a cross-sectional view of a fire check valve; (About Figure 5 AA)

[0033] Figures 1 to 6The symbols in the figure are: mounting seat 1, docking port 11, reducing ring 12, fixing seat 13, hinge 14, mounting ear 15, baffle 151, valve seat 2, valve plate 3, limiter 4, hot melt structure 5, torsion spring 6. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0035] See also Figures 1 to 6 A fire-proof check valve is installed at the air inlet of a smoke exhaust pipe, and comprises a mounting seat 1, a valve seat 2, a valve plate 3, a limiter 4 and a hot-melt structure 5.

[0036] In one embodiment, the mounting base 1 is provided with a docking port 11 at one end facing the outside, and a removable reducing ring 12 is sleeved on the outer periphery of the docking port 11, so that the mounting base 1 can dock with exhaust pipes of more sizes. In addition, the mounting base 1 is provided with a fixing seat 13 at the periphery of one end facing the air inlet of the exhaust pipe, and strip-shaped mounting holes are provided around the fixing seat 13 to improve the installation flexibility of the mounting base 1.

[0037] The valve seat 2 is installed in the mounting seat 1 and is provided with a smoke exhaust port for smoke to enter the smoke exhaust pipe.

[0038] The valve plate 3 is flipped and installed in the mounting seat 1, and the smoke outlet is covered by gravity or a reset mechanism to form a one-way structure to prevent smoke from leaking out. In this embodiment, the valve plate 3 is flipped and installed in the mounting seat 1 through a hinge 14, and the hinge 14 is fixed to the valve plate 3 and the mounting seat 1 by rivets, and is firmly installed. Preferably, a spring is provided in the hinge 14 for opening the hinge 14.

[0039] The stopper 4 is installed in the mounting seat 1 or the valve seat 2 and is located between the valve plate 3 and the smoke exhaust pipe.

[0040] The hot melt structure 5 is installed close to the limiter 4 and limits the displacement of the limiter 4 and the valve plate 3. The hot melt structure 5 melts or softens at a preset temperature, thereby releasing the limiting effect on the limiter 4. The limiter 4 moves to the back of the valve plate 3 under the action of restoring deformation, self-weight or external force mechanism in an unrestricted state, and presses the valve plate 3 on the smoke exhaust port. Preferably, there are two groups of the limiter 4 and the hot melt structure 5, which are symmetrically arranged on both sides of the valve plate 3, so as to provide a uniform pressing force for the valve plate 3 and improve the sealing degree between the valve plate 3 and the smoke exhaust port.

[0041] In this embodiment, one end of the position-limiting member 4 is rotatably mounted in the mounting seat 1, and the other end is swung away from the valve disc 3 or against the valve disc 3. Preferably, the position away from the valve disc 3 is higher than the position against the valve disc 3, and the position-limiting member 4 swings from the position away from the valve disc 3 to the position against the valve disc 3 by its own weight after the restriction is released, which has a simple structure and does not require an additional external force driving structure.

[0042] The specific installation structure is as follows: the mounting seat 1 is provided with a mounting ear 15 with a hinge hole, and the limiter 4 is rotatably mounted on the hinge hole of the mounting ear 15. The end of the mounting ear 15 is provided with a baffle 151, and the baffle 151 limits the lowest angle of the limiter 4 to swing downward, so as to prevent the limiter 4 from being staggered with the limiter 4 after swinging downward. The hot melt structure 5 is a hot melt column with a simple structure, which is installed on the mounting ear 15 and limits the limiter 4 to a position away from the valve plate 3.

[0043] On the basis of the above embodiments, in one embodiment, the stopper 4 is a U-shaped metal rib, has a high deadweight, and is resistant to high temperatures. One end of the stopper 4 is inserted into the hinge hole of the mounting ear 15, and the end sleeve is provided with a torsion spring 6, one end of the torsion spring 6 is clamped on the mounting ear 15, and the other end hooks the stopper 4, providing elastic force for the stopper 4 to swing to the position of supporting the valve plate 3, thereby avoiding the situation that the stopper 4 cannot be reset or is stuck under the action of its own weight, and at the same time, further improving the reset sensitivity of the stopper 4.

[0044] In other embodiments, the limiting member 4 is an elastically bendable rib, which restores its deformation and supports the valve plate 3 after the restriction is released.

[0045] The check valve provided in the utility model has a limit member 4 and a hot melt structure 5, which do not work under normal conditions, and the limit member 4 and the valve plate 3 are staggered. In the event of a fire, when the temperature in the smoke exhaust pipe rises and is filled with smoke, the hot melt structure 5 is heated and melts or softens at a preset temperature, thereby releasing the restrictive effect on the limit member 4, and the limit member 4 can be switched to a state of supporting the valve plate 3, which can prevent smoke from gushing out of the smoke exhaust port, thereby improving the non-return effect and safety of the check valve in a fire scenario.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the present utility model, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0051] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A fire check valve installed at the air inlet of a smoke exhaust duct, characterized in that: It includes a mounting seat, a valve seat, a valve plate, a stopper and a hot melt structure; The valve seat is installed in the mounting seat and is provided with a smoke exhaust port; The valve plate is flipped and installed in the mounting seat, and the smoke exhaust port is sealed by gravity or a reset mechanism to form a one-way structure; The limiter is installed in the mounting seat or the valve seat and is located between the valve plate and the smoke exhaust pipe; The hot-melt structure is installed close to the limiter and limits the displacement of the limiter and the valve plate; the hot-melt structure melts or softens at a preset temperature to release the limiting effect on the limiter, and the limiter moves to the back of the valve plate under the action of deformation recovery, self-weight or external force mechanism in an unrestricted state, and presses the valve plate onto the smoke exhaust port.

2. A fire-proof check valve according to claim 1, characterized in that: There are two groups of the limiter and the hot melt structure, which are symmetrically arranged on both sides of the valve plate.

3. A fire-proof check valve according to claim 1, characterized in that: One end of the limiter is rotatably mounted in the mounting seat, and the other end is swung away from the valve plate position or against the valve plate position.

4. A fire-proof check valve according to claim 3, characterized in that: The position away from the valve plate is higher than the position against the valve plate, and the limiting member swings from the position away from the valve plate to the position against the valve plate by its own weight after the restriction is released.

5. A fire-proof check valve according to claim 4, characterized in that: A mounting ear with a hinge hole is arranged in the mounting seat, and the limiting member is rotatably mounted on the hinge hole of the mounting ear; a baffle is arranged at the end of the mounting ear, and the baffle limits the lowest angle of the downward swing of the limiting member.

6. A fire-proof check valve according to claim 5, characterized in that: The hot melt structure is a hot melt column, which is arranged on the mounting ear and limits the limiting member to a position away from the valve plate.

7. A fire-proof check valve according to claim 5, characterized in that: The limiting member is a U-shaped metal rib, one end of which is inserted into the hinge hole of the mounting ear, and the end sleeve is provided with a torsion spring. One end of the torsion spring is clamped on the mounting ear, and the other end hooks the limiting member to provide elastic force for the limiting member to swing to a position that supports the valve plate.

8. The fire-proof check valve according to claim 1, characterized in that: A docking port is provided at one end of the mounting seat facing outwards, and a detachable reducing ring is sleeved on the outer periphery of the docking port.

9. The fire-proof check valve according to claim 1, characterized in that: A fixing seat is arranged at the periphery of one end of the mounting seat facing the air inlet of the smoke exhaust pipe, and strip-shaped mounting holes are arranged around the fixing seat.

10. The fire-proof check valve according to claim 1, characterized in that: The valve plate is flipped and installed in the mounting seat through a hinge, and the hinge, the valve plate and the mounting seat are fixed by rivets.

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