Combined fireproof check valve

Abstract

The utility model relates to the technical field of check valves, in particular to a combined type fireproof check valve. The combined type fireproof check valve comprises a valve body, an annular groove is formed in the rear side of the valve body, a first sealing ring is placed in the annular groove, connecting bases are evenly arranged in the valve body, and threaded holes are formed in the front sides of the connecting bases in a penetrating mode. When the butterfly valve plate is affected by oil smoke for a long time and cannot work normally, a screw driver is used for taking down the hoop on the outer side of the aluminum foil flue of the range hood and the outer side of the smoke inlet of the valve body, then the aluminum foil flue of the range hood can be separated from the smoke inlet of the valve body, and at the moment, after the screw driver is used for screwing off the bolt, the butterfly valve plate can work normally. The valve element assembly can be pulled out of the valve body through the handle, so that the valve element assembly can be easily cleaned, and the working reliability of the whole check valve is guaranteed; the whole check valve is made of a metal material and a fireproof composite rubber material, so that the whole check valve has fire resistance and burning resistance.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically a combined fireproof check valve. Background Technology

[0002] After prolonged use, the valve plate inside a common check valve is prone to sticking to the valve body due to oil fumes, preventing the valve from opening during operation. Since the valve plate is fixed inside the valve body, the entire check valve needs to be removed for repair when it cannot be opened, which is difficult for ordinary households to do. To address this issue, we have made technological innovations based on the existing check valve. Utility Model Content

[0003] The purpose of this invention is to provide a combined fireproof check valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a combined fireproof check valve, comprising:

[0005] The valve body has an annular groove on its rear side, in which a first sealing ring is placed. Connecting seats are evenly arranged inside the valve body, and a threaded hole is opened through the front side of the connecting seats. A valve core assembly is placed inside the valve body, and the valve core assembly is located on the front side of the connecting seats.

[0006] Preferably, the valve core assembly includes a support ring, a second sealing ring is placed on the outer side wall of the support ring, a limit plate is provided on the inner side wall of the support ring, a handle is provided on the front side of the limit plate, two sets of butterfly valve plates are evenly arranged inside the support ring via a rotating shaft, the outer side wall of the butterfly valve plate is in contact with the inner side wall of the support ring, the front side of the butterfly valve plate is in contact with the rear side of the limit plate, a support column is provided on the inner side wall of the support ring, two sets of torsion springs are evenly sleeved on the outer side wall of the support column, and the two ends of the torsion springs respectively abut against the rear side of the two sets of butterfly valve plates.

[0007] Preferably, the outer wall of the second sealing ring is fitted with the inner wall of the valve body, and the front side of the support ring is uniformly provided with through holes, and bolts are provided in the through holes.

[0008] Preferably, a third sealing ring is placed on the rear side of the bolt head, and the third sealing ring is located on the outer ring of the bolt shank.

[0009] Preferably, the support ring and the second sealing ring are located on the front side of the connecting seat, the bolt is screwed into the threaded hole of the connecting seat, and the rear side of the third sealing ring is in contact with the front side of the support ring.

[0010] Preferably, the valve body, connecting seat, support ring, butterfly valve plate, support column, torsion spring, bolt, limiting plate and handle are all made of metal, and the first sealing ring, second sealing ring and third sealing ring are all made of fireproof composite rubber.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] In this invention, when the butterfly valve plate malfunctions due to prolonged exposure to oil fumes, a screwdriver can be used to remove the clamps on the outside of the range hood's aluminum foil flue and the valve body's smoke inlet. This allows for the separation of the range hood's aluminum foil flue from the valve body's smoke inlet. After unscrewing the bolts, the valve core assembly can be pulled out of the valve body using the handle, making it easy to clean and ensuring the overall reliability of the check valve. The entire check valve is composed of metal and fire-resistant composite rubber, giving it fire-resistant and heat-resistant properties. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a combined fireproof check valve according to this utility model;

[0014] Figure 2 This is a rear view of a combined fireproof check valve according to the present invention.

[0015] Figure 3 This is a left sectional view of a combined fireproof check valve according to this utility model.

[0016] In the diagram: 1. Valve body; 11. Connecting seat; 12. First sealing ring; 13. Support ring; 14. Second sealing ring; 15. Butterfly valve plate; 16. Support column; 17. Torsion spring; 18. Bolt; 181. Third sealing ring; 19. Limiting plate; 2. Handle. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-3 A combined fireproof check valve includes a valve body 1, an annular groove on the rear side of the valve body 1, a first sealing ring 12 placed in the annular groove, a connecting seat 11 uniformly fixed inside the valve body 1, a threaded hole through the front side of the connecting seat 11, and a valve core assembly placed inside the valve body 1, the valve core assembly being located on the front side of the connecting seat 11.

[0019] The valve core assembly includes a support ring 13. A second sealing ring 14 is placed on the outer wall of the support ring 13. A limit plate 19 is fixedly installed on the inner wall of the support ring 13. A handle 2 is fixedly installed on the front side of the limit plate 19. Two sets of butterfly valve plates 15 are evenly rotatable inside the support ring 13 via a rotating shaft. The outer wall of the butterfly valve plate 15 is in contact with the inner wall of the support ring 13, and the front side of the butterfly valve plate 15 is in contact with the rear side of the limit plate 19. A support column 16 is fixedly installed on the inner wall of the support ring 13. Two sets of torsion springs 17 are evenly sleeved on the outer wall of the support column 16. The ends respectively abut against the rear sides of the two sets of butterfly valve plates 15. The outer side wall of the second sealing ring 14 fits against the inner side wall of the valve body 1. The front side of the support ring 13 has evenly spaced through holes. A bolt 18 is rotatably installed in the through hole. A third sealing ring 181 is placed on the rear side of the bolt head of the bolt 18. The third sealing ring 181 is located on the outer ring of the bolt 18. The support ring 13 and the second sealing ring 14 are located on the front side of the connecting seat 11. The bolt 18 is screwed into the threaded hole of the connecting seat 11. The rear side of the third sealing ring 181 fits against the front side of the support ring 13. The valve body 1 is fixed to the wall by expansion bolts. After entering the flue, the first sealing ring 12 seals the connection gap between the valve body 1 and the wall. The aluminum foil flue of the range hood is connected to the smoke inlet of the valve body 1 through a clamp, thus completing the installation of the device. When the smoke enters the valve body 1, it overcomes the elastic force of the torsion spring 17 and pushes open the butterfly valve plate 15, thereby realizing the exhaust of the smoke. When the smoke stops entering the valve body 1, the torsion spring 17 uses its own elastic force to drive the butterfly valve plate 15 to flip forward and reset, thereby realizing the smoke stoppage. The second sealing ring 14 seals the connection gap between the support ring 13 and the valve body 1, and the third sealing ring 14 seals the connection gap between the support ring 13 and the valve body 1. The sealing ring 181 seals the connection gap between the bolt 18 and the support ring 13, thereby improving the integrity of the entire check valve. When the butterfly valve plate 15 cannot work properly due to the influence of oil fumes after a long period of operation, use a screwdriver to remove the clamp on the outside of the aluminum foil flue of the range hood and the smoke inlet of the valve body 1. Then the aluminum foil flue of the range hood can be separated from the smoke inlet of the valve body 1. At this time, after unscrewing the bolt 18 with a screwdriver, the valve core assembly can be pulled out from the valve body 1 by using the handle 2. This makes it easy to clean the valve core assembly, thereby ensuring the reliability of the entire check valve.

[0020] The valve body 1, connecting seat 11, support ring 13, butterfly valve plate 15, support column 16, torsion spring 17, bolt 18, limit plate 19 and handle 2 are all made of metal. The first sealing ring 12, the second sealing ring 14 and the third sealing ring 181 are all made of fireproof composite rubber. The entire check valve is composed of metal and fireproof composite rubber, which makes the entire check valve fireproof and fire-resistant.

[0021] Working principle: After fixing the valve body 1 to the flue in the wall with expansion bolts, the connection gap between the valve body 1 and the wall is sealed by the first sealing ring 12. The aluminum foil flue of the range hood is connected to the smoke inlet of the valve body 1 through a clamp, thus completing the installation of the device. When the smoke enters the valve body 1, it will overcome the elastic force of the torsion spring 17 and push open the butterfly valve plate 15, thereby realizing the exhaust of smoke. When the smoke stops entering the valve body 1, the torsion spring 17 uses its own elastic force to drive the butterfly valve plate 15 to flip forward and reset, thereby realizing the smoke stop. The connection gap between the support ring 13 and the valve body 1 is sealed by the second sealing ring 14, and the bolt 1 is secured by the third sealing ring 181. The connection gap between 8 and the support ring 13 is sealed to improve the integrity of the entire check valve. When the butterfly valve plate 15 cannot work properly due to the influence of oil fumes after a long period of operation, use a screwdriver to remove the clamp on the outside of the aluminum foil flue of the range hood and the smoke inlet of the valve body 1. Then the aluminum foil flue of the range hood can be separated from the smoke inlet of the valve body 1. At this time, after unscrewing the bolt 18 with a screwdriver, the valve core assembly can be pulled out from the valve body 1 through the handle 2. This makes it easy to clean the valve core assembly, thereby ensuring the working reliability of the entire check valve. The entire check valve is composed of metal material and fireproof composite rubber material, so that the entire check valve has fireproof and fire-resistant properties.

Claims

1. A combined fireproof check valve, characterized in that, include: A valve body (1) is provided with an annular groove on the rear side of the valve body (1), and a first sealing ring (12) is placed in the annular groove. A connecting seat (11) is evenly arranged inside the valve body (1), and a threaded hole is provided through the front side of the connecting seat (11). A valve core assembly is placed inside the valve body (1), and the valve core assembly is located on the front side of the connecting seat (11).

2. The combined fireproof check valve according to claim 1, characterized in that: The valve core assembly includes a support ring (13), a second sealing ring (14) is placed on the outer side wall of the support ring (13), a limiting plate (19) is provided on the inner side wall of the support ring (13), a handle (2) is provided on the front side of the limiting plate (19), two sets of butterfly valve plates (15) are evenly arranged inside the support ring (13) through a rotating shaft, the outer side wall of the butterfly valve plate (15) is in contact with the inner side wall of the support ring (13), the front side of the butterfly valve plate (15) is in contact with the rear side of the limiting plate (19), a support column (16) is provided on the inner side wall of the support ring (13), two sets of torsion springs (17) are evenly sleeved on the outer side wall of the support column (16), and the two ends of the torsion springs (17) respectively abut against the rear side of the two sets of butterfly valve plates (15).

3. A combined fireproof check valve according to claim 2, characterized in that: The outer wall of the second sealing ring (14) is in contact with the inner wall of the valve body (1), and the front side of the support ring (13) is uniformly provided with through holes, and bolts (18) are provided in the through holes.

4. A combined fireproof check valve according to claim 3, characterized in that: A third sealing ring (181) is placed on the rear side of the bolt head of the bolt (18), and the third sealing ring (181) is located on the outer ring of the bolt (18).

5. A combined fireproof check valve according to claim 4, characterized in that: The support ring (13) and the second sealing ring (14) are located on the front side of the connecting seat (11), the bolt (18) is screwed into the threaded hole of the connecting seat (11), and the rear side of the third sealing ring (181) is in contact with the front side of the support ring (13).

6. A combined fireproof check valve according to claim 5, characterized in that: The valve body (1), connecting seat (11), support ring (13), butterfly valve plate (15), support column (16), torsion spring (17), bolt (18), limit plate (19) and handle (2) are all made of metal, and the first sealing ring (12), the second sealing ring (14) and the third sealing ring (181) are all made of fireproof composite rubber.

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