Self-adapting flue pressure smoke exhaust backflow prevention valve

Abstract

This utility model discloses an adaptive flue pressure smoke exhaust fire prevention check valve, relating to the technical field of smoke exhaust fire prevention check valves. It includes a valve body and a mounting base fixedly disposed on the outside of the valve body. The front outer wall of the valve body has a groove, and a support plate is disposed within the groove. A hinge rod is hinged to the surface of the support plate near the valve body, and one end of the hinge rod near the valve body is fixedly connected to the inner wall of the groove. A guide groove is formed within the hinge rod, and a guide rod is slidably disposed within the guide groove. A through hole is formed within the mounting base, and a connecting rod is slidably inserted into the through hole. The connecting rod is fixedly connected to the guide rod. A sealing component is provided at the rear opening of the through hole. This utility model utilizes six sets of support plates surrounding the outside of the valve body. During installation, after the valve body is inserted into the hole, rotating a knob on the outside of the valve body opens the six sets of support plates from the hole, thereby supporting the inner wall of the hole for centered positioning, facilitating installation.

Description

Technical Field

[0001] This utility model relates to the technical field of smoke exhaust fire prevention check valves, specifically an adaptive smoke exhaust fire prevention check valve for flue pressure. Background Technology

[0002] Smoke exhaust fireproof backflow preventer valves are common valves used for connecting flue ducts, primarily in kitchens where exhaust ducts connect to the exhaust vents of range hoods. Existing smoke exhaust fireproof backflow preventer valves are typically bolted to the exhaust vent. During installation, the valve body needs to be inserted into a pre-drilled hole. However, since the diameter of the pre-drilled hole is usually larger than the valve body diameter, the valve cannot be directly inserted and centered within the hole. This prevents the sealing ring on the valve body from properly fitting the edge of the vent for a proper seal. Therefore, additional methods and tools are needed to assist in positioning the valve body during installation. Furthermore, after installation, the portion of the valve body inside the vent lacks support. If the positioning bolts loosen, the valve body may wobble within the vent under wind pressure, potentially causing loose seals or noise issues. Utility Model Content

[0003] (a) Technical problems to be solved In view of the above-mentioned shortcomings of the existing technology, the present invention provides an adaptive flue pressure exhaust smoke prevention and backflow prevention valve, which can effectively solve the problems of the existing technology.

[0004] (II) Technical Solution To achieve the above objectives, this utility model employs the following technical solution: This utility model discloses an adaptive flue pressure exhaust fireproof check valve, including a valve body and a mounting base fixedly disposed on the outside of the valve body. The front outer wall of the valve body has a plate groove, and a support plate is disposed in the plate groove. A hinge rod is hinged to the surface of the support plate near the valve body, and the end of the hinge rod near the valve body is fixedly connected to the inner wall of the plate groove. A guide groove is formed in the hinge rod, and a guide rod is slidably disposed in the guide groove. A through hole is formed in the mounting base, and a connecting rod is slidably inserted in the through hole. The connecting rod is fixedly connected to the guide rod. A sealing component is provided at the rear opening of the through hole. An adjustment component for adjusting the angle of the support plate is provided on the rear side of the valve body.

[0005] Furthermore, the annular array of plate grooves is formed on the outer surface of the valve body, and the annular array of support plates is provided in six groups.

[0006] Furthermore, the support plate has an arc-shaped cross-section, and a rubber pad is glued to the surface of the support plate, with anti-slip texture on the surface of the rubber pad.

[0007] Furthermore, each set of support plates is hinged with four sets of hinge rods, and a set of guide rods is slidably inserted into the guide grooves in the two sets of hinge rods that are opposite each other on the left and right. The guide rods are cylinders with diameters that match the inner diameter of the guide grooves, and the connecting rods and guide rods are connected perpendicularly to each other.

[0008] Furthermore, the sealing assembly includes a rubber sleeve, a rubber sleeve is disposed inside the through hole, the connecting rod is movably inserted into the rubber sleeve, a threaded head is fixedly disposed at the rear opening of the through hole on the mounting seat, the rear end of the rubber sleeve is inserted into the threaded head, a threaded sleeve block is threadedly connected to the threaded head, and the threaded sleeve block is movably disposed on the connecting rod, and a sealing rubber ring is fixedly disposed at the rear end of the rubber sleeve.

[0009] Furthermore, the longitudinal section of the sealing ring is triangular, the diameter of the sealing ring increases from back to front, and the diameter of the inner wall of the rear side of the threaded sleeve increases from back to front in an inclined manner.

[0010] Furthermore, the adjustment assembly includes a connecting ring fixedly installed at the rear end of the connecting rod, and the connecting ring is rotatably installed at the front end of the knob. The rear surface of the valve body is provided with an external thread, and the inner wall of the knob is provided with an internal thread that matches the external thread. The knob is sleeved on the rear side of the valve body through the threaded connection of the internal thread and the external thread.

[0011] (III) Beneficial Effects Compared with the known prior art, the technical solution provided by this utility model has the following beneficial effects: This invention utilizes six sets of support plates arranged around the outside of the valve body. During installation, after the valve body is inserted into the hole, rotating a knob on the outside of the valve body opens the six sets of support plates relative to the hole, thus supporting the inner wall of the hole for centering and facilitating installation. Simultaneously, the tension of the support plates provides fixation, supporting the valve body and ensuring it remains centered during daily use, reducing the load on fixing bolts and other fasteners, and preventing the valve body from wobbling within the hole. Furthermore, the adjustable components allow the support plates to be adjusted to multiple angles, adapting to holes of different sizes, thus enhancing the practicality and applicability of this device. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1This is a front view schematic diagram of the structure of this utility model; Figure 2 This is a rear view schematic diagram of the structure of this utility model; Figure 3 This is a front view schematic diagram of the structure of this utility model; Figure 4 This is a side sectional view of the structure of this utility model; Figure 5 This is a bottom view of the structure at the hinge rod in this utility model; Figure 6 This is a cross-sectional view of the sealing component in this utility model.

[0014] The labels in the diagram represent: 1. Valve body; 2. Mounting seat; 3. Plate groove; 4. Support plate; 5. Rubber gasket; 6. Hinge rod; 7. Guide groove; 8. Guide rod; 9. Connecting rod; 10. Through hole; 11. Rubber sleeve; 12. Threaded head; 13. Threaded sleeve block; 14. Sealing ring; 15. Connecting ring; 16. Knob; 17. External thread; 18. Internal thread. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0016] Please see Figure 1-6 This utility model provides an embodiment of an adaptive flue pressure exhaust fireproof backflow preventer valve, comprising a valve body 1 and a mounting base 2 fixedly disposed on the outside of the valve body 1. A plate groove 3 is formed on the outer wall of the front end of the valve body 1, and a support plate 4 is disposed in the plate groove 3. A hinge rod 6 is hinged to the surface of the support plate 4 near the valve body 1, and one end of the hinge rod 6 near the valve body 1 is fixedly connected to the inner wall of the plate groove 3. A guide groove 7 is formed in the hinge rod 6, and a guide rod 8 is slidably disposed in the guide groove 7. A through hole 10 is formed in the mounting base 2, and a connecting rod 9 is slidably inserted in the through hole 10. The connecting rod 9 is fixedly connected to the guide rod 8. A sealing component is provided at the rear opening of the through hole 10, and an adjustment component for adjusting the angle of the support plate 4 is provided on the rear side of the valve body 1.

[0017] As a preferred embodiment of this example, Figure 1 and Figure 3As shown, the grooves 3 are arranged in an annular array on the outer surface of the valve body 1, and the support plates 4 are arranged in an annular array of six sets. This structure is used to ensure the positioning and support effect of the support plates 4 on the valve body 1 when they are opened in the mounting holes, thereby ensuring the stability of the device and reducing the impact of shaking caused by wind pressure in the later stage.

[0018] As a preferred embodiment of this example, Figure 1 and Figure 3 As shown, the support plate 4 has an arc-shaped cross-section, and a rubber pad 5 is glued to the surface of the support plate 4. The surface of the rubber pad 5 is provided with anti-slip texture. This structure allows the support plate 4 to easily fit against the inner wall of the circular hole, while the rubber pad 5 can increase friction, increase fit, reduce slippage, and provide a certain degree of cushioning.

[0019] As a preferred embodiment of this example, Figure 5 As shown, each set of support plates 4 is hinged with four sets of hinge rods 6, and a set of guide rods 8 is slidably inserted into the guide grooves 7 within the two sets of hinge rods 6 that are opposite each other on the left and right. The guide rods 8 are cylinders with diameters that match the inner diameter of the guide grooves 7, and the connecting rods 9 are perpendicularly connected to the guide rods 8. This structure is used to ensure the strength and support stability of the connection between the support plate 4 and the valve body 1 through the hinge rods 6, so that after the support plate 4 is tensioned in the mounting hole, it can ensure a stable positioning effect and support strength for the valve body 1.

[0020] As a preferred embodiment of this example, Figure 4 and Figure 6 As shown, the sealing assembly includes a rubber sleeve 11, which is disposed within the through hole 10. The connecting rod 9 is movably inserted into the rubber sleeve 11. A threaded head 12 is fixedly disposed on the rear opening of the mounting base 2 at the through hole 10. The rear end of the rubber sleeve 11 is inserted into the threaded head 12. A threaded sleeve block 13 is threadedly connected to the threaded head 12, and the threaded sleeve block 13 is movably fitted onto the connecting rod 9. A sealing ring 14 is fixedly disposed on the rear end of the rubber sleeve 11. This structure allows the connecting rod 9 to move and extend within the rubber sleeve 11 in the through hole 10. After installation, tightening the threaded sleeve block 13 seals the connection between the rubber sleeve 11 and the connecting rod 9, thereby preventing the leakage of flue gas.

[0021] As a preferred embodiment of this example, Figure 6 As shown, the longitudinal section of the sealing ring 14 is triangular, and the diameter of the sealing ring 14 increases from back to front. The diameter of the inner wall of the threaded sleeve 13 on the rear side increases from back to front and is inclined. This structure is used so that when the threaded sleeve 13 is gradually tightened, the inclined inner wall of the threaded sleeve 13 will continuously abut and squeeze the sealing ring 14, so that the sealing ring 14 can tightly wrap around the surface of the connecting rod 9 through deformation, thereby improving the sealing performance of the connection.

[0022] As a preferred embodiment of this example, Figure 4 As shown, the adjustment assembly includes a connecting ring 15 fixedly installed at the rear end of the connecting rod 9, and the connecting ring 15 is rotatably installed at the front end of the knob 16. An external thread 17 is provided on the rear surface of the valve body 1, and an internal thread 18 adapted to the external thread 17 is provided on the inner wall of the knob 16. The knob 16 is fitted onto the rear side of the valve body 1 through the threaded connection of the internal thread 18 and the external thread 17. The internal thread 18 and the external thread 17 are self-locking. This structure is used to adjust the opening angle of the support plate 4 by rotating the knob 16, thus facilitating its application to mounting holes of different sizes and allowing the support plate 4 to be tensioned and fixed within the mounting hole for easy installation and positioning of the valve body 1.

[0023] Working principle: In use, first insert the valve body 1 and the support plate 4 surrounding it into the reserved holes. Then, ensure that the mounting base 2 is parallel and flush against the wall. Next, hold the rear end of the valve body 1 and rotate the knob 16. This causes the knob 16 to move backward through the thread action of the internal thread 18 and the external thread 17. The connecting ring 15 will rotate on the knob 16. When the knob 16 moves, the connecting ring 15 will pull the connecting rod 9 out of the through hole 10. The end of the connecting rod 9 will drive the guide rod 8 to pull the hinge rod 6 to unfold on the valve body 1. The guide groove 7 slides to compensate for the displacement, and when the hinge rod 6 unfolds, it will open the support plate 4, so that the support plate 4 can abut against the inner wall of the reserved hole to position, center and support the valve body 1, thereby facilitating the fixing of the mounting base 2 to the wall with bolts. After the operation is completed, the threaded sleeve 13 and the threaded head 12 can be tightened through the threaded connection, so that the threaded sleeve 13 is close to the threaded head 12 and its inner wall will squeeze the sealing ring 14, so that the sealing ring 14 can tightly wrap the connecting rod 9, thereby achieving the sealing of the through hole 10 to prevent flue gas leakage.

[0024] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

[0025] In the description of this application, it should be understood that the terms "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A self-adapting flue pressure smoke venting check valve, characterized in that: The device includes a valve body (1) and a mounting base (2) fixedly disposed on the outside of the valve body (1). The front end of the valve body (1) has a plate groove (3) and a support plate (4) is disposed in the plate groove (3). A hinge rod (6) is hinged to the surface of the support plate (4) near the valve body (1). The end of the hinge rod (6) near the valve body (1) is fixedly connected to the inner wall of the plate groove (3). A guide groove (7) is disposed in the hinge rod (6), and a guide rod (8) is slidably disposed in the guide groove (7). A through hole (10) is disposed in the mounting base (2), and a connecting rod (9) is slidably inserted in the through hole (10). The connecting rod (9) is fixedly connected to the guide rod (8). A sealing component is disposed at the rear opening of the through hole (10). An adjustment component for adjusting the angle of the support plate (4) is disposed on the rear side of the valve body (1).

2. The adaptive flue pressure smoke exhaust fireproof check valve according to claim 1, characterized in that: The plate grooves (3) are arranged in annular array on the outer surface of the valve body (1), and the support plates (4) are arranged in annular array in six groups.

3. The adaptive flue pressure smoke exhaust fireproof check valve according to claim 1, characterized in that: The cross section of the support plate (4) is arc-shaped, and the surface of the support plate (4) is glued with a rubber pad (5), and the surface of the rubber pad (5) is provided with anti-slip texture.

4. The adaptive flue pressure smoke exhaust fireproof check valve according to claim 1, characterized in that: Each set of support plates (4) is hinged with four sets of hinge rods (6), and a set of guide rods (8) is slidably inserted in the guide grooves (7) of the two sets of hinge rods (6) facing each other on the left and right. The guide rods (8) are cylinders with diameters that match the inner diameter of the guide grooves (7). The connecting rods (9) and the guide rods (8) are connected perpendicularly to each other.

5. The adaptive flue pressure exhaust fireproof check valve according to claim 1, characterized in that: The sealing assembly includes a rubber sleeve (11), which is provided in the through hole (10). The connecting rod (9) is movably inserted into the rubber sleeve (11). The mounting base (2) is fixedly provided with a threaded head (12) at the rear opening of the through hole (10). The rear end of the rubber sleeve (11) is inserted into the threaded head (12). A threaded sleeve block (13) is threadedly connected to the threaded head (12), and the threaded sleeve block (13) is movably sleeved on the connecting rod (9). A sealing rubber ring (14) is fixedly provided at the rear end of the rubber sleeve (11).

6. The adaptive flue pressure smoke exhaust fireproof check valve according to claim 5, characterized in that: The longitudinal section of the sealing ring (14) is triangular, the diameter of the sealing ring (14) increases from back to front, and the diameter of the inner wall of the rear side of the threaded sleeve (13) increases from back to front in an inclined manner.

7. The adaptive flue pressure smoke exhaust fireproof check valve according to claim 1, characterized in that: The adjustment assembly includes a connecting ring (15) fixedly installed at the rear end of the connecting rod (9), and the connecting ring (15) is rotatably installed at the front end of the knob (16). The rear surface of the valve body (1) is provided with an external thread (17), and the inner wall of the knob (16) is provided with an internal thread (18) that is compatible with the external thread (17). The knob (16) is sleeved on the rear side of the valve body (1) through the threaded connection of the internal thread (18) and the external thread (17).

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