Water seal device for domestic wastewater discharge pipe of building

Abstract

The utility model discloses a water seal device for a domestic wastewater discharge pipe of a building, which comprises a sewage inspection well buried underground and a U-shaped water seal, the U-shaped water seal comprises a water outlet side and a water inlet side, the water outlet side is communicated with the sewage inspection well through a sewage pipe, and two ports of the U-shaped water seal are plugged through cover plates. The water inlet side of the U-shaped water seal is communicated with a waste water vertical pipe of a building, a rainwater collecting tank is arranged on one side of the U-shaped water seal, a rainwater grate is arranged at the upper end of the rainwater collecting tank, and the rainwater collecting tank is communicated with the upper portion of the water inlet side of the U-shaped water seal through a water supplementing pipe. In conclusion, the automatic water replenishing device has the advantages of convenience in use, capability of automatically replenishing water and no indoor odor return.

Description

Technical Field

[0001] This utility model relates to the field of domestic wastewater discharge technology, specifically to a water seal device for a building's domestic wastewater discharge pipe. Background Technology

[0002] Currently, the outdoor drainage network of residential buildings typically uses a combined sewage and wastewater system. Indoor wastewater risers discharge directly to outdoor sewage inspection wells via sewage pipes. These risers connect to sinks, shower drains, kitchen sinks, and other fixtures on each floor. In practice, some water appliances are often left unused for extended periods, and the drainage water seal is not regularly replenished, causing it to dry out. When the water seal dries out, harmful gases, foul odors, and insects from the outdoor sewage inspection well can enter the building through the sewage pipes and wastewater risers, affecting indoor air quality and the living environment. Therefore, developing a user-friendly, automatically replenishable, and odor-free water seal device for building wastewater discharge pipes is essential. Utility Model Content

[0003] The purpose of this invention is to provide a water seal device for building wastewater discharge pipes that is easy to use, can automatically replenish water, and prevents indoor odors.

[0004] The purpose of this utility model is achieved as follows: it includes a sewage inspection well buried underground and a U-shaped water seal. The U-shaped water seal includes an outlet side and an inlet side. The outlet side is connected to the sewage inspection well through a sewage pipe. Both ends of the U-shaped water seal are sealed with cover plates. The inlet side of the U-shaped water seal is connected to the wastewater riser of the building. A rainwater collection trough is provided on one side of the U-shaped water seal. A rainwater grate is provided at the upper end of the rainwater collection trough. The rainwater collection trough is connected to the upper part of the inlet side of the U-shaped water seal through a water supply pipe.

[0005] Furthermore, a water level sensor is installed on the cover plate.

[0006] Furthermore, the rainwater collection trough is connected to the municipal water supply pipe via a connecting pipe, and a water level sensor is installed inside the rainwater collection trough.

[0007] Furthermore, each cover plate is equipped with a vent pipe.

[0008] Furthermore, a gate valve is installed on the vent pipe, and a flushing pipe is installed on the vent pipe above the water inlet side of the U-shaped water seal. The flushing pipe is located below the gate valve and is connected to the rainwater collection tank. A booster pump is installed on the flushing pipe, and the upper part of the water outlet side of the U-shaped water seal is connected to the sewage inspection well through the sewage outlet pipe.

[0009] Furthermore, a filter screen is installed in the rainwater collection trough at the inlet end of the water supply pipe.

[0010] Furthermore, L-shaped plates are vertically installed on the side walls of the rainwater collection troughs on both sides of the water supply pipe, and the two sides of the filter screen are inserted into the gap between the L-shaped plate and the side wall of the rainwater collection trough. A handle is installed on the filter screen.

[0011] This utility model is a water seal device for the discharge pipe of domestic wastewater in buildings. In actual use, wastewater from kitchens and bathrooms in the building is discharged from the wastewater riser, enters the inlet side of the U-shaped water seal, and then is discharged from the outlet side of the U-shaped water seal through the sewage pipe into the sewage inspection well. This invention incorporates a rainwater collection trough, which collects sufficient rainwater during rainy weather and allows it to settle. If the water level in the U-shaped water seal decreases or dries out, a water replenishment pipe replenishes the U-shaped water seal, maintaining a constant water level and preventing it from drying out. This, in turn, prevents harmful gases, foul odors, and insects from the sewage inspection well from entering the building's interior through the sewage pipe, U-shaped water seal, and wastewater riser, thus avoiding indoor odor problems and maintaining indoor air quality and a comfortable living environment. Furthermore, the water replenishment of the U-shaped water seal in this invention is automatic, requiring minimal manual intervention, making it convenient to operate and use. The water used for replenishment is collected rainwater, eliminating the consumption of tap water, thus improving rainwater utilization, conserving water resources, and reducing tap water consumption. In summary, this invention offers the advantages of ease of use, automatic water replenishment, and prevention of indoor odor backflow. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a top view of the filter screen 19 and the L-shaped plate 20 in this utility model.

[0014] In the diagram: 1-Sewage inspection well, 2-U-shaped water seal, 3-Outlet side, 4-Inlet side, 5-Sewage pipe, 6-Wastewater riser, 7-Rainwater collection trough, 8-Rainwater grate, 9-Make-up water pipe, 10-Water level sensor, 11-Connecting pipe, 12-Tap water pipe, 13-Water level sensor, 14-Ventilation pipe, 15-Gate valve, 16-Flushing pipe, 17-Boosting pump, 18-Sewage outlet pipe, 19-Filter screen, 20-L-shaped plate, 21-Handle. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the present invention shall fall within the protection scope of the present invention.

[0016] like Figures 1-2As shown, this utility model includes a sewage inspection well 1 buried underground and a U-shaped water seal 2. The sewage inspection well 1 is existing technology and is used for the storage and discharge of urban sewage. The U-shaped water seal 2 includes an outlet side 3 and an inlet side 4. The outlet side 3 is connected to the sewage inspection well 1 through a sewage pipe 5. Both ends of the U-shaped water seal 2 are sealed with cover plates. The inlet side 4 of the U-shaped water seal 2 is connected to the wastewater riser 6 of the building. A rainwater collection trough 7 is provided on one side of the U-shaped water seal 2. A rainwater grate 8 is provided at the upper end of the rainwater collection trough 7. The rainwater collection trough 7 is connected to the upper part of the inlet side 4 of the U-shaped water seal 2 through a water supply pipe 9.

[0017] A water level sensor 10 is installed on the cover plate. The water level sensor 10 is an existing instrument used to detect the water level in the U-shaped water seal 2. Two water level sensors 10 are used to detect the water level in the outlet side 3 and the inlet side 4 respectively. Under normal circumstances, the water level on both sides should be consistent. When the water level on both sides of the U-shaped water seal 2 drops at the same time, it indicates that the water appliance has not been used for a long time. At this time, water should be added appropriately to keep a certain amount of water in the U-shaped water seal 2. When the water level on both sides of the U-shaped water seal 2 is inconsistent, the water level on the inlet side 4 is generally higher, while the water level on the outlet side 3 is lower. At this time, there may be a blockage at the bottom of the U-shaped water seal 2, and the wastewater discharged from the wastewater riser 6 cannot be discharged smoothly. At this time, the U-shaped water seal 2 needs to be unblocked.

[0018] The rainwater collection tank 7 is connected to the municipal water pipe 12 via the connecting pipe 11. A water level sensor 13 is installed inside the rainwater collection tank 7. When there is extreme drought, the rainfall is low, and the water storage in the rainwater collection tank 7 is low. In addition, the water evaporates due to dryness, which may cause the tank to dry out. This can lead to the U-shaped water seal 2 drying out, resulting in problems such as indoor odor. To solve this problem, a water level sensor 13 is installed inside the rainwater collection tank 7. When the water level in the rainwater collection tank 7 is lower than the set value, water from the municipal water pipe 12 can be introduced into the rainwater collection tank 7 through the connecting pipe 11 to maintain a certain amount of water in the rainwater collection tank 7, thereby ensuring that the U-shaped water seal 2 can be used normally.

[0019] To ensure pressure balance at both ends of the vent pipe 14, each cover plate is equipped with a vent pipe 14. The vent pipe 14 is used to connect with the outside world, so that wastewater can flow smoothly from the U-shaped water seal 2 into the sewage pipe 5, and then into the sewage inspection well 1.

[0020] A gate valve 15 is installed on the vent pipe 14. A flushing pipe 16 is installed on the vent pipe 14 above the inlet side 4 of the U-shaped water seal 2. The flushing pipe 16 is located below the gate valve 15 and is connected to the rainwater collection tank 7. A booster pump 17 is installed on the flushing pipe 16. The upper part of the outlet side 3 of the U-shaped water seal 2 is connected to the sewage inspection well 1 through the sewage outlet pipe 18. Although the wastewater entering the wastewater riser 6 is generally filtered to remove large-volume impurities, there are still many small-volume impurities. During long-term use, some of the water will gradually settle at the bottom of the U-shaped water seal 2, causing blockage. To prevent this problem, the booster pump 17 can be turned on periodically. The booster pump 17 pumps rainwater from the rainwater collection tank 7 to the inlet side 4 of the U-shaped water seal 2 and pressurizes it to generate a high-pressure water flow. The high-pressure water flow enters the inlet side 4 of the U-shaped water seal 2, and under the action of high pressure and water flow flushing, impurities in the U-shaped water seal 2 are flushed away, preventing them from settling. The above operation is performed intermittently to prevent blockage of the U-shaped water seal 2. During the above operation, the gate valve 15 on the vent pipe 14 is closed, and the pressurized water flows from the inlet side 4 of the U-shaped water seal 2 to the outlet side 3, and finally flows into the sewage inspection well 1 through the sewage outlet pipe 18.

[0021] A filter screen 19 is installed in the rainwater collection tank 7 at the inlet end of the water supply pipe 9. After the rainwater flows through the rain grate 8, it falls into the rainwater collection tank 7. Although the rainwater has been filtered once, in order to allow the rainwater to flow into the rainwater collection tank 7 quickly, the rain grate 8 can only filter larger impurities such as leaves and garbage. It cannot effectively filter small particles. Therefore, there are still a lot of impurities in the rainwater flowing into the rainwater collection tank 7. These impurities enter the U-shaped water seal 2 and are prone to sedimentation and blockage. Therefore, the filter screen 19 is installed to filter the rainwater again, reduce the impurities in the rainwater as much as possible, and prevent the U-shaped water seal 2 from becoming blocked.

[0022] To facilitate the cleaning and replacement of the filter screen 19, L-shaped plates 20 are vertically installed on the side walls of the rainwater collection tanks 7 on both sides of the water supply pipe 9. The two sides of the filter screen 19 are inserted into the gap between the L-shaped plates 20 and the side walls of the rainwater collection tanks 7. The filter screen 19 is equipped with a handle 21. When the filter screen 19 becomes clogged after a period of use and needs to be cleaned or replaced, it can be pulled out from the L-shaped plates 20 through the handle 21. After cleaning or replacement, the cleaned or new filter screen 19 can be inserted into its original position. The operation is relatively convenient and quick.

[0023] In the process of using this utility model, a connecting horizontal pipe can be set between the water inlet side 4 and the water outlet side 3 of the U-shaped water seal 2 for backup pipe, which directly connects the water inlet side 4 and the water outlet side 3. A valve is set on it. Under normal circumstances, the valve is in a normally closed state. When the bottom of the U-shaped water seal 2 is blocked and the blockage cannot be dealt with in time, the valve can be opened and domestic wastewater can flow through the connecting horizontal pipe.

Claims

1. A water seal device for building sanitary waste discharge pipes, comprising a sewage inspection well (1) buried in the ground and a U-shaped water seal (2), characterized in that: The U-shaped water seal (2) comprises a water outlet side (3) and a water inlet side (4), the water outlet side (3) is communicated with the sewage inspection well (1) through a sewage pipe (5), both ends of the U-shaped water seal (2) are blocked by cover plates, the water inlet side (4) of the U-shaped water seal (2) is communicated with a waste water vertical pipe (6) of a building, one side of the U-shaped water seal (2) is provided with a rainwater collecting groove (7), the upper end of the rainwater collecting groove (7) is provided with a rainwater grate (8), the rainwater collecting groove (7) is communicated with the upper part of the water inlet side (4) of the U-shaped water seal (2) through a water supplement pipe (9).

2. A water seal device for a building sanitary waste pipe according to claim 1, characterised in that: A water level sensor (10) is arranged on the cover plate.

3. A water seal device for a building sanitary waste pipe according to claim 1, wherein: The rainwater collecting groove (7) is communicated with a municipal water pipe (12) through a communication pipe (11), and a water level sensor (13) is arranged in the rainwater collecting groove (7).

4. A water seal device for a building sanitary waste pipe according to claim 1, wherein: An air pipe (14) is arranged on each cover plate.

5. A water seal device for a building sanitary waste pipe according to claim 4, characterised in that: A gate valve (15) is arranged on the air pipe (14), a flushing pipe (16) is arranged above the air pipe (14) of the water inlet side (4) of the U-shaped water seal (2), the flushing pipe (16) is below the gate valve (15), the flushing pipe (16) is communicated with the rainwater collecting groove (7), a pressurizing pump (17) is arranged on the flushing pipe (16), and the upper part of the water outlet side (3) of the U-shaped water seal (2) is communicated with the sewage inspection well (1) through a sewage outlet pipe (18).

6. A water seal device for a building sanitary waste pipe according to claim 1, wherein: A filter screen (19) is arranged in the rainwater collecting groove (7) at the water inlet end of the water supplement pipe (9).

7. A water seal device for a building sanitary waste pipe according to claim 6, characterised in that: L-shaped plates (20) are vertically arranged on the side walls of the rainwater collecting grooves (7) on both sides of the water supplement pipe (9), the filter screens (19) are inserted into the gaps between the L-shaped plates (20) and the side walls of the rainwater collecting grooves (7), and handles (21) are arranged on the filter screens (19).

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