Anti-backflow check vent valve device

Abstract

The utility model discloses a prevent backflow check vent valve device, including the valve body, the opposite both sides of valve body all are established with the opening, two opening places all are equipped with the pipeline, the inside rotation cooperation of valve body has with its one opening corresponding valve disc, the inside rotation cooperation of valve body has the first screw rod, the periphery thread cooperation of first screw rod has buffer assembly, and buffer assembly includes the board body, the multiple telescopic links of board body lower side installation, the buffer pad of multiple telescopic link lower end installation and with valve disc corresponding. The utility model discloses the buffer pad that sets up, can rapidly absorb the impact force that valve disc produced when rotating upward, thereby reduces the situation that the inner wall of valve disc and valve body produces the collision, effectively improved the sealing property of valve body, and the multiple telescopic links that set up simultaneously, can rapidly absorb the impact force that buffer pad produced when moving upward, and carry out buffer shock attenuation to it, and the protection effect to valve disc and valve body is played.

Description

Technical Field

[0001] This utility model relates to the field of ventilation valve technology, specifically to a backflow prevention and check ventilation valve device. Background Technology

[0002] A ventilation valve is a device used to regulate or control the flow of gas. It is usually installed in a duct or system to achieve functions such as pressure balance, exhausting gas, or introducing fresh air. At the same time, the main reason for the backflow prevention function of the ventilation valve is to prevent air or gas from flowing in an unexpected direction, so as to ensure the normal operation of the ventilation system and indoor air quality.

[0003] When air flows through the pipe, the valve disc is impacted by the air, causing it to collide with the inner wall of the valve. Over time, this damages both the valve disc and the valve's inner wall, affecting the valve's sealing and leading to backflow of gas. Therefore, it is urgent to design a backflow prevention check valve to solve this problem. Utility Model Content

[0004] The purpose of this invention is to provide a backflow prevention and check valve device to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A backflow prevention and check valve device includes a valve body with openings on both sides of the valve body and pipes installed at both openings. A valve disc corresponding to one of the openings is rotatably fitted inside the valve body. A first screw is rotatably fitted inside the valve body. A buffer assembly is threaded around the first screw. The buffer assembly includes a plate, multiple telescopic rods installed on the lower side of the plate, and a buffer pad installed at the lower end of the multiple telescopic rods and corresponding to the valve disc.

[0007] Each of the two pipes is equipped with a flange at one end, and a plurality of second screws are rotatably fitted on one side of each of the two flanges. A first ring is threaded onto the periphery of each of the plurality of second screws. A filter screen is installed at one end of each of the two pipes, and the filter screen is located between the first ring and the flange.

[0008] Furthermore, the size of the two filter screens is larger than the size of the two pipes, and two blocks are symmetrically installed in the upper part of the valve body. An L-shaped rod is rotatably fitted between the two blocks, and a second ring is installed at one end of the L-shaped rod.

[0009] Furthermore, a first mounting hole is provided on one side of the valve disc, a first threaded groove is provided on the inner side of the first mounting hole, a first bolt that is threadedly engaged with the first threaded groove is installed in the second ring, and a slot is provided on the other side of the valve disc.

[0010] Furthermore, a rubber sealing gasket corresponding to the other end of one of the pipes is installed in the groove, and a magnetic ring is installed at the other end of one of the pipes and on the other side of the valve disc, and the two magnetic rings are attracted to each other magnetically.

[0011] Furthermore, a support rod is installed on the inner side of the valve body, one end of the plate body is slidably fitted to the periphery of the support rod, the other opening is located between the support rod and the first screw, and a motor is installed at the upper end of the valve body.

[0012] Furthermore, the output end of the motor is fixed to one end of the first screw, and the telescopic rod includes a column installed at the lower end of the plate, a slide rod slidably fitted in the middle of the lower end of the column, and a spring installed between the column and the buffer pad. The lower end of the slide rod is fixed to the upper side of the buffer pad.

[0013] Furthermore, the spring is sleeved around the slide rod, a valve cover is installed at the upper end of the valve body, two second mounting holes are symmetrically opened at the upper end of the valve body, mounting plates are installed at both ends of the valve cover, and a second threaded groove is provided in each of the two second mounting holes.

[0014] Furthermore, each of the plurality of second screws is equipped with a turntable at one end, the size of the valve disc is larger than the size of one of the pipes, and the middle of each of the two mounting plates is equipped with a second bolt that is threaded to the second thread groove.

[0015] In the above technical solution, the backflow prevention and check valve device provided by this utility model has the following beneficial effects:

[0016] 1. By setting the first screw, the first screw is threadedly engaged with the plate body, thereby the plate body drives the buffer pad to move up and down inside the valve body. The position of the buffer pad can be adjusted to the optimal height for buffering according to the valve disc of different sizes.

[0017] 2. The buffer pad can quickly absorb the impact force generated when the valve disc rotates upward, thereby reducing the collision between the valve disc and the inner wall of the valve body and effectively improving the sealing performance of the valve body.

[0018] 3. The multiple telescopic rods can quickly absorb the impact force generated when the buffer pad moves upward and buffer and dampen it, thereby protecting the valve disc and valve body and effectively reducing the occurrence of gas backflow caused by damage to the valve disc and valve body.

[0019] 4. The two filters can filter and purify impurities in the air, thereby improving indoor air quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a structural front view of an embodiment of the anti-backflow check ventilation valve device of this utility model.

[0022] Figure 2 A schematic diagram of the opening structure provided for an embodiment of the anti-backflow ventilation valve device of this utility model.

[0023] Figure 3 A schematic diagram of the flange structure provided for an embodiment of the anti-backflow check ventilation valve device of this utility model.

[0024] Figure 4 A schematic diagram of the valve disc structure provided for an embodiment of the anti-backflow and check valve device of this utility model.

[0025] 1. Valve body; 2. Opening; 3. Pipeline; 4. Valve disc; 5. First screw; 6. Plate; 7. Telescopic rod; 8. Buffer pad; 9. Flange; 10. Second screw; 11. First ring; 12. Filter screen; 13. Block; 14. L-shaped rod; 15. Second ring; 16. First bolt; 17. Groove; 18. Rubber sealing gasket; 19. Magnetic ring; 20. Support rod; 21. Motor; 22. Column; 23. Slide rod; 24. Spring; 25. Valve cover; 26. Second bolt. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-4As shown, the anti-backflow check ventilation valve device provided in this embodiment of the utility model includes a valve body 1. Openings 2 are provided on both opposite sides of the valve body 1. Pipes 3 are installed at both openings 2. A valve disc 4 corresponding to one of the openings 2 is rotatably fitted inside the valve body 1. A first screw 5 is rotatably fitted inside the valve body 1. A buffer assembly is threaded around the first screw 5. The buffer assembly includes a plate 6, multiple telescopic rods 7 installed on the lower side of the plate 6, and a buffer pad 8 installed at the lower end of the multiple telescopic rods 7 and corresponding to the valve disc 4. A flange 9 is installed at one end of each of the two pipes 3. Multiple second screws 10 are rotatably fitted on one side of each of the two flanges 9. A first ring 11 is threaded around the periphery of each of the multiple second screws 10. A filter screen 12 is installed at one end of each of the two pipes 3, and the filter screen 12 is located between the first ring 11 and the flange 9.

[0028] In this embodiment, a valve body 1 is included. Openings 2 are provided on both sides of the valve body 1. Pipes 3 are installed at both openings 2. A valve disc 4 corresponding to one of the openings 2 is rotatably fitted inside the valve body 1. A first screw 5 is rotatably fitted inside the valve body 1.

[0029] Specifically, a first mounting hole is provided on one side of the valve disc 4, and a first threaded groove is provided on the inner side of the first mounting hole. A first bolt 16 that is threadedly engaged with the first threaded groove is installed in the second ring 15. A slot 17 is provided on the other side of the valve disc 4. The first bolt 16 is provided so that it is threadedly engaged with the first threaded groove, thereby disassembling the L-shaped rod 14 from the valve disc 4, which makes it convenient for workers to replace or repair the valve disc 4.

[0030] Specifically, a rubber sealing gasket 18 corresponding to the other end of one of its pipes 3 is installed in the slot 17. A magnetic ring 19 is installed at the other end of one of its pipes 3 and on the other side of the valve disc 4. The two magnetic rings 19 are attracted to each other magnetically. Through the magnetic attraction of the two magnetic rings 19, the valve disc 4 is more tightly fitted to the other end of its pipe 3, thereby reducing the occurrence of gas backflow.

[0031] Specifically, a support rod 20 is installed on the inner side of the valve body 1, one end of the plate 6 is slidably fitted to the periphery of the support rod 20, and the other opening 2 is located between the support rod 20 and the first screw 5. A motor 21 is installed at the upper end of the valve body 1. Through the support rod 20, one end of the plate 6 is slidably fitted to the periphery of the support rod 20, so that the buffer assembly is more stable when moving up and down.

[0032] Specifically, the output end of the motor 21 is fixed to one end of the first screw 5. The telescopic rod 7 includes a column 22 installed at the lower end of the plate 6, a slide rod 23 slidably fitted in the middle of the lower end of the column 22, and a spring 24 installed between the column 22 and the buffer pad 8. The lower end of the slide rod 23 is fixed to the upper side of the buffer pad 8. Through the extension and retraction of the spring 24, the buffer pad 8 elastically pushes the valve disc 4, so that the valve disc 4 quickly fits and seals the other end of one of its pipes 3, further improving the sealing performance of the valve body 1.

[0033] Specifically, the spring 24 is sleeved around the slide rod 23, the upper end of the valve body 1 is equipped with a valve cover 25, and two second mounting holes are symmetrically opened at the upper end of the valve body 1. Mounting plates are installed at both ends of the valve cover 25, and a second threaded groove is provided in both second mounting holes.

[0034] In this embodiment, the first screw 5 is threaded with a buffer assembly on its periphery. The buffer assembly includes a plate 6, a plurality of telescopic rods 7 installed on the lower side of the plate 6, and a buffer pad 8 installed at the lower end of the plurality of telescopic rods 7 and corresponding to the valve disc 4. One end of each of the two pipes 3 is equipped with a flange 9, and one side of each of the two flanges 9 is rotatably fitted with a plurality of second screws 10. The periphery of each of the plurality of second screws 10 is threaded with a first ring 11.

[0035] Specifically, a turntable is installed at one end of each of the multiple second screws 10. The size of the valve disc 4 is larger than the size of one of its pipes 3. The middle of each of the two mounting plates is equipped with a second bolt 26 that is threaded into the second thread groove. By setting the two second bolts 26, the two second bolts 26 are threaded into the two second thread grooves, thereby creating or canceling the fixed relationship between the valve cover 25 and the valve body 1, and the valve body 1 can be opened or closed.

[0036] In this embodiment, a filter screen 12 is installed at one end of each of the two pipes 3, and the filter screen 12 is located between the first ring 11 and the flange 9;

[0037] Specifically, the size of the two filter screens 12 is larger than the size of the two pipes 3. Two blocks 13 are symmetrically installed in the upper part of the valve body 1. An L-shaped rod 14 is rotatably fitted between the two blocks 13. A second ring 15 is installed at one end of the L-shaped rod 14. Through the filter screens 12, impurities or particulate matter in the air can be intercepted and filtered to purify the indoor air.

[0038] Working steps: First, when installing the filter screen 12, rotate multiple turntables. This will cause multiple turntables to rotate multiple second screws 10, making the first ring 11 threadedly engaged with the multiple second screws 10. This will drive the first ring 11 to move away from the flange 9, changing the gap between the first ring 11 and the flange 9. After adjustment, place the filter screen 12 between the first ring 11 and the flange 9. Then, rotate multiple turntables in the opposite direction, making the first ring 11 threadedly engaged with the multiple second screws 10 in the opposite direction. This will drive the first ring 11 to move closer to the flange 9, thereby clamping and fixing the filter screen 12, thus completing the installation of the filter screen 12. When the filter screen 12 needs to be disassembled and cleaned, it can be removed in the same way, allowing the staff to clean or replace the filter screen 12.

[0039] 2. When valve disc 4 needs to be installed, insert the first bolt 16 into the second ring 15 and rotate it so that the first bolt 16 engages with the first threaded groove, thereby fixing valve disc 4 and L-shaped rod 14 together, thus completing the installation of valve disc 4. When valve cover 25 needs to be installed, insert the two second bolts 26 into the two second mounting holes and rotate them so that the two second bolts 26 engage with the two second threaded grooves, thereby fixing valve cover 25 and valve body 1 together, thus completing the installation of valve cover 25. When valve disc 4 or valve cover 25 needs to be disassembled, the operation is reversed.

[0040] 3. When the position of the buffer assembly needs to be adjusted, start the motor 21. The output end of the motor 21 drives the first screw 5 to rotate, so that the first screw 5 is threadedly engaged with the plate 6, thereby driving the plate 6, multiple telescopic rods 7, and buffer pad 8 to move up and down synchronously. At the same time, one end of the plate 6 is slidably engaged with the periphery of the support rod 20, which can adjust the position of the buffer pad 8 to the optimal height suitable for the buffer valve plate 4, thereby realizing the position adjustment of the buffer assembly.

[0041] Fourth, when air enters one of its pipes 3, its filter screen 12 intercepts and filters impurities or particles in the air. At the same time, the filtered air impacts the valve disc 4, causing the valve disc 4 to drive the L-shaped rod 14 to rotate inside the two blocks 13, thereby opening one of its openings 2. At this time, the upward rotating valve disc 4 impacts and squeezes the buffer pad 8. At the same time, the buffer pad 8 first buffers the impact force generated when the valve disc 4 rotates upward. Then, the buffer pad 8 drives multiple sliding rods 23 to slide and cooperate in the middle of the lower end of multiple columns 22. At this time, multiple springs 24 simultaneously perform elastic extension and contraction, absorbing the upward impact force on the buffer pad 8 and damping it, thereby reducing the possibility of the valve disc 4 colliding with the valve body 1 and causing damage. At this time, the filtered air is introduced into another pipe 3 through another opening 2. At the same time, the filtered air undergoes secondary filtration through another filter screen 12, and the secondary filtered air enters the room, effectively improving the indoor air quality.

[0042] 5. When the valve disc 4 is not impacted by air, its own weight will cause the L-shaped rod 14 to rotate downwards in the opposite direction. At the same time, the valve disc 4 will stop impacting and squeezing the buffer pad 8. At this time, multiple springs 24 will elastically extend and retract simultaneously, causing multiple sliding rods 23 to slide and engage in the middle of the lower end of multiple columns 22. Thus, multiple sliding rods 23 will drive the buffer pad 8 to elastically extend and retract simultaneously. At the same time, the buffer pad 8 can elastically push the valve disc 4, thereby accelerating the reverse rotation of the valve disc 4. At this time, the two magnetic rings 19 will magnetically attract each other, which can tightly fit the valve disc 4 with the other end of its pipe 3. At the same time, the rubber sealing gasket 18 will seal the other end of its pipe 3, thereby closing its opening 2, reducing the occurrence of gas backflow, and achieving a seal on the valve body 1.

[0043] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A backflow prevention and check valve device, comprising a valve body (1), characterized in that, The valve body (1) has openings (2) on both sides, and pipes (3) are installed at both openings (2). The valve body (1) is rotatably fitted with a valve disc (4) corresponding to one of the openings (2). The valve body (1) is rotatably fitted with a first screw (5). The first screw (5) is threaded around its periphery with a buffer assembly. The buffer assembly includes a plate (6), multiple telescopic rods (7) installed on the lower side of the plate (6), and a buffer pad (8) installed at the lower end of the multiple telescopic rods (7) and corresponding to the valve disc (4). Each of the two pipes (3) is equipped with a flange (9) at one end, and a plurality of second screws (10) are rotatably fitted on one side of each of the two flanges (9). A first ring (11) is threaded onto the periphery of each of the plurality of second screws (10). A filter screen (12) is installed at one end of each of the two pipes (3), and the filter screen (12) is located between the first ring (11) and the flange (9).

2. The anti-backflow check ventilation valve device according to claim 1, characterized in that, The two filter screens (12) are larger than the two pipes (3). Two blocks (13) are symmetrically installed in the upper part of the valve body (1). An L-shaped rod (14) is rotatably fitted between the two blocks (13). A second ring (15) is installed at one end of the L-shaped rod (14).

3. The anti-backflow check ventilation valve device according to claim 2, characterized in that, A first mounting hole is provided on one side of the valve disc (4), a first threaded groove is provided on the inner side of the first mounting hole, a first bolt (16) is installed in the second ring (15) and threadedly engaged with the first threaded groove, and a slot (17) is provided on the other side of the valve disc (4).

4. The anti-backflow check ventilation valve device according to claim 3, characterized in that, The slot (17) is equipped with a rubber sealing gasket (18) corresponding to the other end of one of the pipes (3). The other end of one of the pipes (3) and the other side of the valve disc (4) are both equipped with magnetic rings (19), and the two magnetic rings (19) are magnetically attracted to each other.

5. The anti-backflow check ventilation valve device according to claim 1, characterized in that, The valve body (1) is provided with a support rod (20) on its inner side. One end of the plate (6) is slidably fitted to the periphery of the support rod (20). The other opening (2) is located between the support rod (20) and the first screw (5). The upper end of the valve body (1) is provided with a motor (21).

6. The anti-backflow check ventilation valve device according to claim 5, characterized in that, The output end of the motor (21) is fixed to one end of the first screw (5). The telescopic rod (7) includes a column (22) installed at the lower end of the plate (6), a slide rod (23) slidably fitted in the middle of the lower end of the column (22), and a spring (24) installed between the column (22) and the buffer pad (8). The lower end of the slide rod (23) is fixed to the upper side of the buffer pad (8).

7. The anti-backflow check ventilation valve device according to claim 6, characterized in that, The spring (24) is sleeved on the periphery of the slide rod (23). The upper end of the valve body (1) is equipped with a valve cover (25). The upper end of the valve body (1) has two symmetrical second mounting holes. Both ends of the valve cover (25) are equipped with mounting plates. The two second mounting holes are each provided with a second threaded groove.

8. The anti-backflow check valve device according to claim 7, characterized in that, Each of the second screws (10) is equipped with a turntable at one end. The size of the valve disc (4) is larger than the size of one of the pipes (3). The middle of each of the two mounting plates is equipped with a second bolt (26) that is threaded to the second thread groove.

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