A double-plate fireproof check valve with good sealing performance

Abstract

This utility model relates to the field of check valve technology, specifically disclosing a double-plate fireproof check valve with good sealing effect. It includes a valve body, a flue clamp on the side of the valve body, an air inlet channel on the outward side of the valve body, an air inlet at the outward end of the air inlet channel, a partition plate in the middle of the air inlet dividing the air inlet into two parts, and two valve plates rotatably mounted on the inward side of the partition plate to seal the two parts of the air inlet respectively. A spring-loaded device is also provided on the inward side of the partition plate, with its two ends contacting the inward sides of the two valve plates respectively. A crossbeam is also provided at the air inlet, located on the outward side of the partition plate, with magnets on the inward side of the crossbeam corresponding to the two valve plates for adsorbing the valve plates. This utility model's double-plate structure, combined with the rubber sleeves on the valve plate edges, effectively seals the air inlet, reducing gas leakage. Simultaneously, the magnets on the crossbeam adsorb the valve plates, further enhancing the sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically a double-plate fireproof check valve with good sealing effect. Background Technology

[0002] In the complex systems of modern buildings and industrial facilities, fire-resistant check valves are key devices for ensuring fire safety and stable system operation. They are devices that combine fire prevention and backflow prevention, automatically closing in the event of a fire to stop the spread of fire and smoke through ventilation ducts, while simultaneously preventing the reverse flow of gas or liquid under normal operating conditions, ensuring the normal operation of the system.

[0003] Chinese patent CN216618662U discloses a fireproof check valve for public flues that prevents the spread of cooking fumes and odors. The valve includes a mounting plate with an air inlet pipe on its upper surface and an exhaust pipe on its lower surface. A working plate is located at the connection between the air inlet and exhaust pipes. An exhaust port is located on the surface of the working plate, and a rebound device is located on the surface of the exhaust port. A valve plate is located at one end of the rebound device, and a flame-retardant device is located on the surface of the valve plate. A fixing device is located on the side surface of the mounting plate, and a sealing device is located on one side of the exhaust pipe. In the event of a fire in other units on the same floor, the flame-retardant plate at the bottom of the valve plate and the flame-retardant coating applied to the inner wall of the exhaust pipe can suppress the spread of fire, preventing it from spreading through the public flue and ensuring the safety of the home, thus buying more time for occupants to evacuate.

[0004] In the above technical solution, when the kitchen exhaust system is not working, the valve plate is limited only by the rebound device, which results in a problem of poor sealing between the valve plate and the exhaust port. Utility Model Content

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A double-plate fireproof check valve with good sealing performance includes a valve body. A flue clamp is provided on the side of the valve body. An air inlet channel is provided on the outward side of the valve body. An air inlet is provided at the outward end of the air inlet channel. A partition plate is provided in the middle of the air inlet, dividing the air inlet into two parts. Two valve plates are rotatably provided on the inward side of the partition plate, which respectively seal the two parts of the air inlet. A spring-loaded device is also provided on the inward side of the partition plate. The two ends of the spring-loaded device are in contact with the inward side of the two valve plates respectively. A crossbeam is also provided at the air inlet. The crossbeam is located on the outward side of the partition plate. Magnet blocks are provided on the inward side of the crossbeam corresponding to the two valve plates for adsorbing the valve plates.

[0007] Preferably, the edge of the valve plate is covered with a rubber sleeve.

[0008] Preferably, the rebound device includes a mounting bracket, which is detachably mounted on the inward-facing side of the partition plate and is located within the area covered by the partition plate. A mounting rod is provided in the middle of the mounting bracket, and a torsion spring is sleeved on the mounting rod. The two ends of the torsion spring contact the inward-facing sides of the two valve plates respectively.

[0009] Preferably, a locking mechanism is provided on the outward side of the mounting bracket. The locking mechanism includes a stop bar, a fusible baffle, and a second torsion spring. The stop bar is located on the outward side of the mounting bracket. The mounting rod has an L-shaped structure, with one end passing through the mounting bracket and the stop bar sequentially and connecting to the partition plate. The second torsion spring is sleeved on the mounting rod between the stop bar and the partition plate. One end of the second torsion spring is fixedly mounted on the partition plate, and the other end of the second torsion spring is connected to the stop bar. The fusible baffle is detachably mounted on the inward side of the partition plate, and a first limiting plate is provided on its inward side. The first limiting plate contacts the side of the stop bar in the direction of rotation. A second limiting plate is provided on the mounting bracket, located on the other side of the stop bar.

[0010] Preferably, the partition plate is provided with an opening corresponding to the fuse baffle.

[0011] Preferably, the flue clamp is a torsion spring structure.

[0012] Preferably, the fusible baffle is made of a thermosensitive metal.

[0013] Preferably, a flow guide is also provided on the inward-facing side of the valve housing.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model features a dual-valve plate structure with rubber sleeves on the valve plate edges, which can effectively seal the air inlet and reduce gas leakage. At the same time, the magnetic block on the crossbeam attracts the valve plate, further enhancing the sealing performance and ensuring that gas does not flow back during normal use.

[0016] This utility model uses a fusible baffle made of thermosensitive metal, which can respond quickly in the event of a fire, triggering the locking mechanism to close the valve plate quickly, thus blocking the spread of fire and smoke through the pipes and buying time for personnel evacuation and fire rescue.

[0017] The rebound device and locking mechanism of this utility model work together to ensure that the valve plate can be opened and closed flexibly under normal conditions, and can also be automatically and quickly closed in case of fire; the design of the flow guide optimizes the gas flow path and improves the overall performance of the check valve. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the A-direction structure;

[0020] Figure 3 for Figure 1 Schematic diagram of the B-direction structure;

[0021] Figure 4 for Figure 3 Schematic diagram of partial cross-section along the CC direction;

[0022] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0023] In the diagram: 1. Valve housing; 2. Flue clamp; 3. Air intake channel; 4. Air inlet; 5. Divider plate; 51. Opening; 6. Valve plate; 7. Rebound device; 71. Mounting bracket; 72. Mounting rod; 73. Torsion spring one; 8. Crossbeam; 9. Magnet block; 11. Locking mechanism; 111. Stop bar; 112. Fusible baffle; 113. Torsion spring two; 114. Limiting plate one; 115. Limiting plate two; 12. Flow guide. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," and "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0027] like Figure 1-4 As shown in this embodiment, a double-plate fireproof check valve with good sealing performance includes a valve body 1. A flue clamping buckle 2 is provided on the side of the valve body 1. The flue clamping buckle 2 adopts a torsion spring structure, which facilitates quick and easy clamping and fixing of the valve body 1 to the flue, improving installation efficiency. An air inlet channel 3 is provided on the outward-facing side of the valve body 1. An air inlet 4 is provided at the outward-facing end of the air inlet channel 3. A partition plate 5 is provided in the middle of the air inlet 4, dividing the air inlet 4 into two parts. Two valve plates 6 are rotatably mounted on the inward-facing side of the partition plate 5, sealing the two parts of the air inlet 4 respectively. A rubber sleeve is provided around the edge of the valve plate 6, which effectively fills the gap between the valve plate 6 and the air inlet 4, further enhancing the sealing effect.

[0028] In this embodiment, a spring-loaded device 7 is also provided on the inward side of the partition plate 5. The spring-loaded device 7 includes a mounting bracket 71, which is detachably mounted on the inward side of the partition plate 5 and is located within the area covered by the partition plate 5. A mounting rod 72 is provided in the middle of the mounting bracket 71, and a torsion spring 73 is sleeved on the mounting rod 72. The two ends of the torsion spring 73 are in contact with the inward sides of the two valve plates 6, respectively. When gas flows in normally, the valve plates 6 open under the action of gas pressure. When the gas stops flowing in or a reverse flow trend occurs, the spring-loaded force provided by the torsion spring 73 causes the valve plates 6 to quickly return to their original position, achieving a seal.

[0029] In this embodiment, a crossbeam 8 is also provided at the air inlet 4. The crossbeam 8 is located on the outward side of the partition plate 5, and magnets 9 are provided on the inward side of the crossbeam 8 corresponding to the two valve plates 6 for adsorbing the valve plates 6. When the valve plates 6 are closed, the magnets 9 and the valve plates 6 attract each other, further enhancing the sealing of the valve plates 6 and preventing gas leakage.

[0030] In this embodiment, a locking mechanism 11 is also provided on the outward side of the mounting bracket 71. The locking mechanism 11 includes a stop rod 111, a fusible baffle 112, and a second torsion spring 113. The stop rod 111 is located on the outward side of the mounting bracket 71. The mounting rod 72 has an L-shaped structure, with one end passing through the mounting bracket 71 and the stop rod 111 and connecting to the partition plate 5. The second torsion spring 113 is sleeved on the mounting rod 72 between the stop rod 111 and the partition plate 5. One end of the second torsion spring 113 is fixedly mounted on the partition plate 5, and the other end of the second torsion spring 113 is connected to the stop rod 111. The fusible baffle 112 is detachably located on the inward side of the partition plate 5, and a first limiting plate 114 is provided on its inward side. The first limiting plate 114 contacts the side of the stop rod 111 in the rotation direction. A second limiting plate 115 is provided on the mounting bracket 71, and the second limiting plate 115 is located on the other side of the stop rod 111. The fusible baffle 112 is made of thermosensitive metal. When a fire occurs and the ambient temperature rises to the melting point of the thermosensitive metal, the fusible baffle 112 melts and loses its limiting function on the baffle 111. The torsion spring 113 drives the baffle 111 to rotate, which in turn causes the mounting rod 72 to rotate, thereby achieving rapid closure of the valve plate 6 and effectively blocking the spread of fire.

[0031] In this embodiment, the partition plate 5 is provided with an opening 51 corresponding to the fusible baffle 112, so that the outward side of the fusible baffle 112 can be heated, ensuring that the locking mechanism 11 can also operate normally in the event of a fire indoors.

[0032] The working principle and beneficial effects of the above technical solution are as follows:

[0033] During use, the valve body 1 is connected to the flue via the flue clamp 2. Since the flue clamp 2 is a torsion spring structure, simply align the valve body 1 with the flue installation position, press the flue clamp 2 to open it, slip it onto the flue, and then release it. The flue clamp 2 will then firmly hold the flue in place by the elastic force of the torsion spring, completing the quick installation.

[0034] When gas flows in through the inlet 4, the gas pressure pushes the two valve plates 6 to rotate around their rotating connection with the partition plate 5, overcoming the elastic force of the torsion spring 73 and opening the valve plates 6. Gas then flows into the valve body 1 through the intake channel 3. When the gas stops flowing in or a backflow trend occurs, the torsion spring 73 releases its elastic force, pushing the valve plates 6 back to their original position and resealing the inlet 4 to prevent gas backflow. At this time, the rubber sleeve on the edge of the valve plate 6 fits tightly against the inner wall of the inlet 4, reducing gas leakage. The magnet 9 on the crossbeam 8 has a certain adsorption effect on the valve plates 6, helping to maintain the stability of the valve plates 6.

[0035] When a fire occurs and the ambient temperature rises to the melting point of the fusible baffle 112, the fusible baffle 112 melts, and the limiting plate 114 loses its limiting function on the stop rod 111. The torsion spring 113 releases its elastic force, driving the stop rod 111 to rotate around the mounting rod 72, and the two valve plates 6 quickly close, effectively blocking the spread of fire and smoke through the pipeline. At the same time, the flow guide shroud 12 can guide the gas to be evenly distributed during the gas flow and valve plate 6 closing process, reducing the interference of airflow on the valve plate 6 closing action and ensuring the reliable operation of the fireproof check valve. Example 2

[0036] like Figure 1-5 As shown, based on Embodiment 1, in this embodiment, a flow guide shroud 12 is also provided on the inward side of the valve housing 1. After the flue gas is introduced, it acts on the flow guide shroud 12, realizing the rapid output of the flue gas.

[0037] The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be included within the scope of protection of this utility model.

Claims

1. A double-plate fireproof check valve with good sealing performance, characterized in that: The valve includes a valve housing (1), a flue clamp (2) is provided on the side of the valve housing (1), an air intake channel (3) is provided on the outward side of the valve housing (1), an air inlet (4) is provided at the outward end of the air intake channel (3), a partition plate (5) is provided in the middle of the air inlet (4), the partition plate (5) divides the air inlet (4) into two parts, two valve plates (6) are rotatably provided on the inward side of the partition plate (5) to seal the two parts of the air inlet (4) respectively, a spring-loaded device (7) is also provided on the inward side of the partition plate (5), the two ends of the spring-loaded device (7) are in contact with the inward side of the two valve plates (6) respectively, a crossbeam (8) is also provided at the air inlet (4), the crossbeam (8) is located on the outward side of the partition plate (5), and a magnet block (9) is provided on the inward side of the crossbeam (8) corresponding to the two valve plates (6) for adsorbing the valve plates (6).

2. The double-plate fireproof check valve with good sealing effect according to claim 1, characterized in that: The edge of the valve plate (6) is covered with a rubber sleeve.

3. The double-plate fireproof check valve with good sealing effect according to claim 1, characterized in that: The rebound device (7) includes a mounting bracket (71), which is detachably mounted on the inward side of the partition plate (5) and is located within the area covered by the partition plate (5). A mounting rod (72) is provided in the middle of the mounting bracket (71), and a torsion spring (73) is sleeved on the mounting rod (72). The two ends of the torsion spring (73) are respectively in contact with the inward side of the two valve plates (6).

4. A double-plate fireproof check valve with good sealing effect according to claim 3, characterized in that: A locking mechanism (11) is also provided on the outward side of the mounting bracket (71). The locking mechanism (11) includes a stop bar (111), a fusible baffle (112), and a second torsion spring (113). The stop bar (111) is located on the outward side of the mounting bracket (71). The mounting rod (72) has an L-shaped structure, with one end passing through the mounting bracket (71) and the stop bar (111) and connecting to the partition plate (5). The second torsion spring (113) is sleeved on the mounting rod (72) between the stop bar (111) and the partition plate (5). One end of the second torsion spring (113) is fixedly mounted on the partition plate (5), and the other end of the second torsion spring (113) is connected to the stop rod (111). The fusible baffle (112) is detachably mounted on the inner side of the partition plate (5), and a limiting plate (114) is provided on the inner side of the baffle. The limiting plate (114) contacts the side of the stop rod (111) in the rotation direction. A limiting plate (115) is provided on the mounting bracket (71), and the limiting plate (115) is located on the other side of the stop rod (111).

5. A double-plate fireproof check valve with good sealing effect according to claim 4, characterized in that: The partition plate (5) is provided with an opening (51) corresponding to the fuse baffle (112).

6. A double-plate fireproof check valve with good sealing effect according to claim 1, characterized in that: The flue clamp (2) is a torsion spring structure.

7. A double-plate fireproof check valve with good sealing effect according to claim 4, characterized in that: The fusible baffle (112) is made of thermosensitive metal.

8. A double-plate fireproof check valve with good sealing effect according to claim 1, characterized in that: A flow guide (12) is also provided on the inward side of the valve body (1).

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