Anti-backflow drainage port cut-off device

Abstract

The utility model discloses an anti-backflow drainage port cut-off device, relates to the technical field of backflow cut-off devices, and solves the technical problems that according to an existing drainage port cut-off device, the flange connecting position is prone to loosening and water leakage, and the service life is short. Comprising a check valve body, the check valve body comprises a valve body and mounting flange plates arranged on the two sides of the valve body, and a mounting notch is formed in a port of each mounting flange plate; the end of the first connecting pipeline is connected with a first assembly flange plate, and the end of the second connecting pipeline is connected with a second assembly flange plate. The device further comprises a limiting structure. By means of the design, the check valve body, the first connecting pipeline and the second connecting pipeline are effectively prevented from rotating in the splicing process, smooth assembly and high efficiency of the device are guaranteed, the sealing performance is remarkably improved, the problem of water leakage caused by loosening of the flange connecting position is effectively solved, and the service life of the device is prolonged. Therefore, the service life of the whole device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of backflow interception devices, in particular to an anti-backflow drain outlet interception device. Background Art

[0002] A backflow prevention device, also known as a backflow preventer / backflow valve or check valve, primarily prevents the backflow of media in pipelines, thereby avoiding possible contamination, equipment damage, or safety incidents. Its components include the valve body, disc, spring (for some types), bonnet, seat, and other auxiliary components. These components work together to automatically open and close the check valve, effectively preventing backflow. This device is widely used in water supply and drainage systems, hot water systems, chemical production, pharmaceutical production, and other applications requiring backflow prevention.

[0003] Currently, when existing drain interceptor devices (check valves) are used to connect different pipes, the flange joints can become loose due to the impact of the water flow, causing leakage, due to the varying flow rates and pressures between the pipes. Furthermore, prolonged leakage can damage the flange joint structure itself, effectively reducing the service life of the interceptor device (check valve). Therefore, to address these issues, we have designed a drain interceptor device to prevent backflow. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a backflow prevention drain outlet interception device, which solves the technical problems of existing drain outlet interception devices, such as the flange connection being prone to loosening and leaking, and having a short service life.

[0005] To achieve the above-mentioned object, according to an embodiment of the first aspect of the present invention, a backflow prevention drain outlet interception device is provided, comprising a check valve body, the check valve body comprising a valve body and mounting flanges disposed on both sides of the valve body, each mounting flange having a mounting notch disposed within its port;

[0006] Connecting pipeline 1 and connecting pipeline 2, wherein the end of connecting pipeline 1 is connected to mounting flange 1, and the end of connecting pipeline 2 is connected to mounting flange 2;

[0007] Also includes:

[0008] A limiting structure, comprising a plurality of circular positioning pins and a convex ring connected to the inner side surfaces of the first and second mounting flanges, wherein the sides of the first and second mounting flanges cooperate to form a slot for each positioning pin;

[0009] Sealing structure, the sealing structure includes a sealing ring connected to the inner wall surface of each installation notch and a rubber sleeve sleeved on each convex ring.

[0010] Further improvement lies in that both the convex ring and the rubber sleeve are divided into a head section and a tail section. The head section of the rubber sleeve fits over the head section of the convex ring, and the side of the tail section of the rubber sleeve fits against the inner side of the tail section of the convex ring.

[0011] Further improvement lies in that after the first connecting pipeline and the second connecting pipeline are respectively inserted into the installation notches of each installation flange, the outer wall surface of the head section of the rubber sleeve fits against the inner wall of the sealing ring, the convex ring is located within the installation notch, and the inner side of the tail section of the rubber sleeve fits against the side of the sealing ring.

[0012] Further improvement lies in that the convex rings on the first assembly flange and the second assembly flange are located inside the positioning insertion posts.

[0013] Further improvement lies in that both the first assembly flange and the second assembly flange are connected to the installation flanges on both sides of the valve body through fixing bolts.

[0014] Further improvement lies in that the check valve body further includes a valve core disposed within the valve body and an adjusting handwheel disposed on the valve body and connected to the valve core.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] (1) In the present utility model, by inserting the positioning insertion posts on the first assembly flange at one end of the connecting pipeline into the slots of the installation flange on the side of the valve body, the convex ring is embedded into the side installation notch of the installation flange. At this time, the outer wall of the head section of the rubber sleeve closely adheres to the inner wall of the sealing ring, and the inner side of the tail section is in contact with the side of the sealing ring. After using the fixing bolts to tightly connect the first assembly flange, the second assembly flange and the installation flanges on both sides of the valve body, the rubber sleeve and the sealing ring are mutually extruded to form a double sealing structure. At the same time, the tail section of the convex ring exerts an additional extrusion on the rubber sleeve and the sealing ring, enhancing the sealing effect.

[0017] (2) This design of the present utility model not only effectively prevents the rotation of the check valve body, the first connecting pipeline and the second connecting pipeline during the splicing process, ensuring the smooth assembly and high efficiency of the device, but also significantly improves the sealing performance, effectively avoiding the water leakage problem caused by loosening at the flange connection, thereby extending the service life of the entire device. Brief Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 is the overall sectional structural schematic diagram of the present utility model;

[0020] Figure 3 This is a schematic cross-sectional structure diagram of the first connecting pipeline and the first assembly flange of the present utility model.

[0021] Markings in the figure:

[0022] 1. First connecting pipeline; 11. First assembly flange;

[0023] 2. Check valve body; 21. Valve body; 22. Adjusting handwheel; 23. Mounting flange; 201. Mounting notch;

[0024] 3. Second connecting pipeline; 31. Second assembly flange; 301. Slot;

[0025] 4. Limiting structure; 41. Positioning plug post; 42. Convex ring;

[0026] 5. Sealing structure; 51. Sealing ring; 52. Rubber sleeve ring; 501. Head section; 502. Tail section. Specific embodiments

[0027] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figure 1 shown, the anti-backflow drainage port interception device includes a check valve body 2. The check valve body 2 includes a valve body 21, mounting flanges 23 provided on both sides of the valve body 21, and an adjusting handwheel 22 provided on the valve body 21. An installation notch 201 is provided in the port of each mounting flange 23;

[0029] The first connecting pipeline 1 and the second connecting pipeline 3. The end of the first connecting pipeline 1 is connected with a first assembly flange 11, and the end of the second connecting pipeline 3 is connected with a second assembly flange 31;

[0030] Specifically, both the first assembly flange 11 and the second assembly flange 31 are connected to the mounting flanges 23 on both sides of the valve body 21 through fixing bolts to achieve disassembly and assembly;

[0031] As Figure 2 and Figure 3As shown in the figure, during implementation, it includes: a limiting structure 4. The limiting structure 4 includes several positioning studs 41 circularly connected to the inner sides of the first assembly flange 11 and the second assembly flange 31, and a convex ring 42. The convex ring 42 is located inside the several positioning studs 41. Slots 301 for installing each positioning stud 41 are cooperatively provided on the sides of the first assembly flange 11 and the second assembly flange 31. By inserting the positioning studs 41 on the first assembly flange 11 at one end of the first connecting pipeline 1 into the slots 301 of the mounting flange 23 on the side of the valve body 21, and embedding the convex ring 42 into the side mounting notch 201 of the mounting flange 23, it can effectively prevent the check valve body 2, the first connecting pipeline 1, and the second connecting pipeline 3 from rotating during the splicing process, ensuring the smooth assembly and high efficiency of the device;

[0032] As Figure 2 and 3 shown in the figure, during implementation, it includes: a sealing structure 5. The sealing structure 5 includes a sealing ring 51 connected to the inner wall surface of each mounting notch 201 and a rubber sleeve 52 sleeved on each convex ring 42;

[0033] Specifically, both the convex ring 42 and the rubber sleeve 52 are divided into a head section 501 and a tail section 502. The head section 501 of the rubber sleeve 52 is tightly fitted over the head section 501 of the convex ring 42, and the side of the tail section 502 of the rubber sleeve 52 is tightly fitted to the inside of the tail section 502 of the convex ring 42;

[0034] Specifically, as a preferred implementation method, after the first connecting pipeline 1 and the second connecting pipeline 3 are respectively inserted into the mounting notches 201 of each mounting flange 23, the outer wall surface of the head section 501 of the rubber sleeve 52 is tightly fitted to the inner wall of the sealing ring 51, the convex ring 42 is located inside the mounting notch 201, and the inner side of the tail section 502 of the rubber sleeve 52 is tightly fitted to the side of the sealing ring 51. After the first connecting pipeline 1 and the second connecting pipeline 3 are docked with the valve body 21, the outer wall of the head section 501 of the rubber sleeve 52 is closely attached to the inner wall of the sealing ring 51, and the inner side of the tail section 502 is in contact with the side of the sealing ring 51. When the first assembly flange 11, the second assembly flange 31, and the mounting flanges 23 on both sides of the valve body 21 are tightly connected by using the fixing bolts 25, the rubber sleeve 52 and the sealing ring 51 are mutually extruded, and a double sealing structure 5 can be formed. At the same time, the tail section 502 of the convex ring 42 exerts an additional extrusion on the rubber sleeve 52 and the sealing ring 51, which can enhance the sealing effect.

[0035] As Figures 1 to 3As shown, it needs to be explained that the working principle of the check valve body 2 in this embodiment is to adjust the closing and opening of the valve core through the adjusting handwheel 22 to achieve the interception of the anti-backflow drain port. This part is prior art and the working principle has been made public, so it will not be elaborated in this embodiment. In addition, it should be noted that this application document only aims to improve the disadvantages of the existing drain port interception device (check valve), such as easy loosening and leakage at the flange connection and low service life, and does not involve improvements in other aspects. The working principle of this anti-backflow drain port interception device is introduced as follows:

[0036] When the present novelty is in use, first, the assembly personnel install the rubber gasket 52 on the convex ring 42, and then configure the sealing ring 51 on the inner wall surface of the installation notch 201.

[0037] Next, by inserting the positioning stud 41 on the first assembly flange 11 at one end of the first connecting pipeline 1 into the slot 301 of the side installation flange 23 of the valve body 21, the convex ring 42 is embedded into the side installation notch 201 of the installation flange 23. At this time, the outer wall of the head section 501 of the rubber gasket 52 is in close contact with the inner wall of the sealing ring 51, and the inner side of the tail section 502 is in contact with the side of the sealing ring 51. After using the fixing bolts to tightly connect the first assembly flange 11, the second assembly flange 31 and the installation flanges 23 on both sides of the valve body 21, the rubber gasket 52 and the sealing ring 51 are mutually extruded to form a double-sealing structure 5. At the same time, the tail section 502 of the convex ring 42 exerts additional extrusion on the rubber gasket 52 and the sealing ring 51, enhancing the sealing effect. The other side is inserted in the same way.

[0038] The above design not only effectively prevents the rotation of the check valve body 2, the first connecting pipeline 1 and the second connecting pipeline 3 during the splicing process, ensures the smooth assembly and high efficiency of the device, but also significantly improves the sealing performance, effectively avoids the water leakage problem caused by loosening at the flange connection, and thus extends the service life of the entire device.

[0039] The above embodiments are only used to illustrate the technical method of the present utility model and not to limit it. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present utility model.

Claims

1. Anti-backflow drain port intercepting device, including a check valve body (2), the check valve body (2) includes a valve body (21), and mounting flange plates (23) arranged on both sides of the valve body (21), and each port of the mounting flange plate (23) is provided with a mounting notch (201); Connecting pipeline one (1) and connecting pipeline two (3), an assembly flange plate one (11) is connected to the end of the connecting pipeline one (1), and an assembly flange plate two (31) is connected to the end of the connecting pipeline two (3); It is characterized in that It further includes: A limiting structure (4), the limiting structure (4) includes several positioning insertion posts (41) circularly connected to the inner sides of the assembly flange plate one (11) and the assembly flange plate two (31) and a convex ring (42), and the sides of the assembly flange plate one (11) and the assembly flange plate two (31) are cooperatively provided with slots (301) for installing each positioning insertion post (41); A sealing structure (5), the sealing structure (5) includes a sealing ring (51) connected to the inner wall surface of each mounting notch (201) and a rubber sleeve (52) sleeved on each convex ring (42).

2. The anti-backflow drain port intercepting device according to claim 1, characterized in that Both the convex ring (42) and the rubber sleeve (52) are divided into a head section (501) and a tail section (502). The head section (501) of the rubber sleeve (52) is fittingly sleeved on the head section (501) of the convex ring (42), and the side of the tail section (502) of the rubber sleeve (52) is fittingly attached to the inner side of the tail section (502) of the convex ring (42).

3. The anti-backflow drain port interception device according to claim 2, characterized in that, After the connecting pipeline one (1) and the connecting pipeline two (3) are respectively inserted into the mounting notches (201) of each mounting flange plate (23), the outer wall surface of the head section (501) of the rubber sleeve (52) is fittingly attached to the inner wall of the sealing ring (51), the convex ring (42) is located in the mounting notch (201), and the inner side of the tail section (502) of the rubber sleeve (52) is fittingly attached to the side of the sealing ring (51).

4. The anti-backflow drainage port intercepting device according to claim 1, characterized in that, The convex ring (42) on the assembly flange plate one (11) and the assembly flange plate two (31) is located inside the positioning insertion post (41).

5. The anti-backflow drain port intercepting device according to claim 1, characterized in that, Both the assembly flange plate one (11) and the assembly flange plate two (31) are connected to the mounting flange plates (23) on both sides of the valve body (21) through fixing bolts.

6. The anti-backflow drain port intercepting device according to claim 1, characterized in that, The check valve body (2) further includes a valve core arranged in the valve body (21) and an adjusting handwheel (22) arranged on the valve body (21) and connected to the valve core.

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