Drainage funnel capable of preventing odor from overflowing

Abstract

The drainage funnel comprises a rubber anti-reverse-overflow valve and a drainage straight pipe, the rubber anti-reverse-overflow valve comprises an annular top end thickening part, a wedge-shaped connecting side wall, a flat water outlet part and a flat Z-shaped bend, one part of the top end thickening part is located on the inner side of the drainage straight pipe, and the other part of the top end thickening part is located on the inner side of the drainage straight pipe. The connecting side wall is in a wedge shape with the top end in a circular transition mode and the bottom end in a long strip shape, the top end of the connecting side wall is connected with the bottom end, located on the inner side of the drainage straight pipe, of the top end thickening part in a sealed mode, and the water outlet part is of a flat annular structure with the two ends closed. And the Z-shaped bend is of a flat annular structure that the water outlet part is bent upwards towards one side and then bent downwards. The drainage funnel can prevent smell from escaping upwards through blocking of the rubber anti-overflow valve, due to the fact that the Z-shaped bend is arranged at the bottom, when water is not drained, a bent loop is formed at the position of the Z-shaped bend, the smell hardly escapes upwards, the clean space of home life is guaranteed, and better comfortable experience is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of building water supply and drainage, and particularly relates to a drainage funnel for preventing the backflow of foul odor. Background Art

[0002] The drainage of the end water test device and the drain valve of the fire protection system should pass through a funnel and the indoor rain / wastewater system, and finally be discharged into the outdoor rain / wastewater drainage pipe. When the funnel is connected to the indoor sewage system, a water seal should be set before the funnel is connected to the pipe because the sewage system is filled with foul odor. However, due to the monthly cycle of fire protection water test and the too long interval time, the water seal is easy to dry up, resulting in the backflow of foul odor and causing indoor environmental pollution. Therefore, in the design, connecting to the indoor sewage system has been avoided all the time, which increases the design difficulty and also increases the consumption of pipe materials.

[0003] For this reason, the patent with the publication number of CN201351296Y discloses an elastic sealing anti-odor drain funnel, which includes an elastic funnel body with an open upper end. The lower part of the funnel body is wedge-shaped, the thickness of the two plane side walls is thinner than the wall thickness of other parts of the funnel body, and the water outlet at the lower part of the funnel body is also converged into a flat film shape and elastically fits and seals.

[0004] However, in actual use, there are still situations where the blocking effect is poor and the odor slightly escapes. In addition, the installation of this funnel is not very firm and it is easy to fall off. Summary of the Utility Model

[0005] The utility model provides a drainage funnel for preventing the backflow of foul odor to solve the technical problems mentioned in the background art.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a drainage funnel for preventing the backflow of foul odor, which includes a rubber anti-backflow valve and a drainage straight pipe. The rubber anti-backflow valve includes an annular top thickened part, a wedge-shaped connecting side wall, a flat water outlet part and a flat Z-shaped bend. A part of the top thickened part is located inside the drainage straight pipe, and the other part is folded to the outer side wall of the drainage straight pipe. The connecting side wall is a wedge shape with a circular top transitioning to a long strip at the bottom. The top of the connecting side wall is hermetically connected to the bottom end of the top thickened part located inside the drainage straight pipe. The water outlet part is a flat and closed annular structure at both ends. The Z-shaped bend is a flat annular structure formed by the water outlet part turning upward to one side and then turning downward. A closed channel is formed inside the top thickened part, the connecting side wall, the water outlet part and the Z-shaped bend. The length of the water outlet part is 4 / 5 of the diameter of the top thickened part.

[0007] By adopting the above technical solution, the drainage funnel can prevent the odor from escaping upward through the obstruction of the rubber anti-backflow valve. Since a Z-shaped bend is provided at the bottom, when there is no drainage, a bent circuit is formed at the Z-shaped bend, and it is almost impossible for the odor to escape upward. While for the traditional wedge-shaped elastic sealing funnel, it has a straight up-and-down linear circuit, and there is still a certain degree of slight upward escape. This application has been further optimized to further reduce the upward escape of the odor. Due to the plasticity of the rubber anti-backflow valve, it can be opened by the gravity of water during drainage and can automatically recover after the water is drained, ensuring a clean space for home life and providing a better comfortable experience.

[0008] Preferably, the part where the top thickened part is folded to the outer wall of the drainage straight pipe is fixed to the drainage straight pipe by a stainless steel pipe clamp.

[0009] By adopting the above technical solution, compared with directly placing the traditional wedge-shaped elastic sealing funnel, this application directly places the drainage straight pipe and fixes the rubber anti-backflow valve on the drainage straight pipe by using a stainless steel pipe clamp, with a more firm installation structure and a longer service life.

[0010] Preferably, there are two stainless steel pipe clamps arranged in the height direction.

[0011] By adopting the above technical solution, with double fixation, the structure is firm.

[0012] Preferably, an annular groove is provided at the part of the top thickened part where the stainless steel pipe clamp is installed.

[0013] By adopting the above technical solution, it can better fix the rubber anti-backflow valve to the drainage straight pipe.

[0014] Preferably, a reducing pipe fitting is fixedly inserted at the bottom end of the drainage straight pipe, and the top end of the reducing pipe fitting is thicker than the bottom end.

[0015] By adopting the above technical solution, it is convenient to connect to the main drainage pipeline.

[0016] Preferably, a U-shaped water seal bend pipe is connected to the bottom end of the reducing pipe fitting, and the other end of the U-shaped water seal bend pipe is in a straight pipe shape along the horizontal direction.

[0017] By adopting the above technical solution, in cooperation with the U-shaped water seal bend pipe, the double cooperation further ensures odor prevention.

[0018] The beneficial effects of the present utility model are embodied in: 1. The drainage funnel is blocked by the rubber anti-backflow valve, which can prevent the odor from escaping. Since a Z-shaped bend is provided at the bottom, when there is no drainage, a curved circuit is formed at the Z-shaped bend, and it is almost impossible for the odor to escape upward. While for the traditional wedge-shaped elastic sealing funnel, it has a straight up-and-down linear circuit, and there is still a certain degree of slight upward escape. This application has been further optimized to further reduce the upward escape of the odor. Due to the plasticity of the rubber anti-backflow valve, it can be opened by the gravity of water during drainage and can automatically recover after the water is drained, ensuring a clean space for home life and providing a better comfort experience;

[0019] 2. Compared with directly placing the traditional wedge-shaped elastic sealing funnel, this application directly places the drainage straight pipe and fixes the rubber anti-backflow valve on the drainage straight pipe using a stainless steel pipe clamp. The installation structure is more firm, the service life is longer, and it is more reliable and durable when dealing with the situation of a large amount of water in a short time during the fire protection system test.

[0020] Other features and advantages of the present utility model will be described in the following specification, and will be partially obvious from the specification, or will be understood by implementing the present utility model; the main purpose and other advantages of the present utility model can be achieved and obtained through the solutions specifically pointed out in the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural view of the present utility model embodiment when there is no drainage;

[0022] Figure 2 is a schematic structural view of the present utility model embodiment when draining water

[0023] Figure 3 is a side view of the rubber anti-backflow valve of the present utility model embodiment;

[0024] Figure 4 is a top view of the rubber anti-backflow valve of the present utility model embodiment.

[0025] Reference numerals: 1. Rubber anti-backflow valve; 11. Top thickened part; 12. Connecting side wall; 13. Water outlet part; 14. Z-shaped bend; 2. Drainage straight pipe; 3. Stainless steel pipe clamp; 4. Reducing pipe fitting; 5. U-shaped water seal bend pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will detail the technical solutions of the present utility model through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solutions of the present utility model, rather than being construed as a limitation of the technical solutions of the present utility model.

[0027] Combined with Figures 1-4, A drainage funnel for preventing odor backflow, comprising a rubber anti-backflow valve 1 and a drainage straight pipe 2. The rubber anti-backflow valve 1 includes an annular top thickened part 11, a wedge-shaped connecting side wall 12, a flat water outlet part 13, and a flat Z-shaped bend 14. A part of the top thickened part 11 is located inside the drainage straight pipe 2, and the other part is folded to the outer side wall of the drainage straight pipe 2. The connecting side wall 12 is a wedge shape with a circular top transitioning to a long strip at the bottom. The top of the connecting side wall 12 is hermetically connected to the bottom end of the top thickened part 11 located inside the drainage straight pipe 2. The water outlet part 13 is a flat and closed-loop structure at both ends. The Z-shaped bend is a flat annular structure formed by the water outlet part 13 turning upward to one side and then turning downward. A closed channel is formed inside the top thickened part 11, the connecting side wall 12, the water outlet part 13, and the Z-shaped bend 14. The length of the water outlet part 13 is 4 / 5 of the diameter of the top thickened part 11.

[0028] Due to the blockage of the rubber anti-backflow valve 1, the drainage funnel can prevent odor from escaping. Since a Z-shaped bend is provided at the bottom, when there is no drainage, a curved loop is formed at the Z-shaped bend, and it is almost impossible for the odor to escape upward. While for the traditional wedge-shaped elastic sealing funnel, it is a straight up and down linear loop, and there is still a certain degree of slight upward escape. This application has further optimized to ensure a clean space for home life and provides a better comfortable experience.

[0029] The part where the top thickened part 11 is folded to the outer side wall of the drainage straight pipe 2 is fixed to the drainage straight pipe 2 through a stainless steel pipe clamp 3. Compared with directly placing the traditional wedge-shaped elastic sealing funnel, in this application, the drainage straight pipe 2 is directly placed and the rubber anti-backflow valve 1 is fixed on the drainage straight pipe 2 by using the stainless steel pipe clamp 3, so the installation structure is more firm and the service life is longer.

[0030] There are two stainless steel pipe clamps 3 arranged in the height direction for double fixation, and the structure is firm.

[0031] An annular groove is provided at the part of the top thickened part 11 where the stainless steel pipe clamp 3 is installed, which can better fix the rubber anti-backflow valve 1 to the drainage straight pipe 2.

[0032] The bottom end of the drainage straight pipe 2 is fixedly inserted with a reducing pipe fitting 4. The top of the reducing pipe fitting 4 is thicker than the bottom end, which is convenient for connecting to the main drainage pipeline.

[0033] The bottom end of the reducing pipe fitting 4 is connected to a U-shaped water seal bend pipe 5. The other end of the U-shaped water seal bend pipe 5 is in a straight pipe shape along the horizontal direction. Cooperating with the U-shaped water seal bend pipe 5, the double cooperation further ensures odor prevention.

[0034] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A drainage funnel for preventing odor backflow, characterized in that: It includes a rubber anti-backflow valve (1) and a drainage straight pipe (2). The rubber anti-backflow valve (1) includes an annular top thickened part (11), a wedge-shaped connecting side wall (12), a flat water outlet part (13), and a flat Z-shaped bend (14). A part of the top thickened part (11) is located inside the drainage straight pipe (2), and the other part is folded to the outer side wall of the drainage straight pipe (2). The connecting side wall (12) is a wedge shape with a circular top transitioning to a long strip at the bottom. The top of the connecting side wall (12) is hermetically connected to the bottom end of the top thickened part (11) located inside the drainage straight pipe (2). The water outlet part (13) is a flat and closed-loop structure at both ends. The Z-shaped bend is a flat annular structure where the water outlet part (13) turns upward to one side and then turns downward. A closed channel is formed inside the top thickened part (11), the connecting side wall (12), the water outlet part (13), and the Z-shaped bend (14). The length of the water outlet part (13) is 4 / 5 of the diameter of the top thickened part (11).

2. The drainage funnel for preventing odor backflow according to claim 1, wherein: The part where the top thickened part (11) is folded to the outer side wall of the drainage straight pipe (2) is fixed to the drainage straight pipe (2) by a stainless steel pipe clamp (3).

3. The drainage funnel for preventing foul odor backflow according to claim 2, characterized in that: There are two stainless steel pipe clamps (3) arranged in the height direction.

4. The drainage funnel for preventing odor backflow according to claim 3, characterized in that: An annular groove is provided at the part of the top thickened part (11) where the stainless steel pipe clamp (3) is installed.

5. The drainage funnel for preventing odor backflow according to claim 4, characterized in that: A reducing pipe fitting (4) is fixedly inserted at the bottom end of the drainage straight pipe (2), and the top of the reducing pipe fitting (4) is thicker than the bottom end.

6. The drainage funnel for preventing foul odor backflow according to claim 5, wherein: A U-shaped water seal bend pipe (5) is connected to the bottom end of the reducing pipe fitting (4), and the other end of the U-shaped water seal bend pipe (5) is in a straight pipe shape along the horizontal direction.

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