Water meter preventing back-flow of sewage

Abstract

The invention provides a water meter combination preventing back-flow of sewage, the water meter combination preventing the back-flow of the sewage comprises a drain water non-return device, an outlet water non-return device and a water meter assembly, wherein a housing of the device is connected and communicated with the water meter assembly. An inlet of the water meter assembly comprises two non-return plates which are respectively matched with bases for realizing sealing and non-return effect, a control chamber is arranged at the lower part between the two non-return plates, a diaphragm is arranged in the control chamber, the diaphragm is flatly paved on the top end surface of a pressure plate, a lower cover is used for being covered and fastened on the housing of the drain water non-return device for forming a control cavity, and water of a water inlet of the drain water non-return device enters into the control cavity through a through hole on the housing without externally hanging a control accessory. The water meter combination has the benefits that the water meter combination preventing the back-flow of the sewage is a water meter device which strictly limits a pressure medium in a pipeline to flow in single direction, the structure is compact, and the mounting space is saved; the water meter combination can not only meet the metering requirement, but also meet the situation of guiding the back-flow medium or the medium in critical back-flow in the pipeline out of the pipe under any working condition and from air isolating, the mounting length is basically coincided with a home water meter, and the water meter combination has good interchangeability with the water meter which is currently used in families at the present stage, thereby being not afraid of malicious damage, ensuring the safety of water supply and preventing the pollution.

Description

technical field [0001] The invention relates to a device structure, in particular to an anti-fouling backflow water meter combination. Background technique [0002] At present, the safety of urban water supply has become a matter of great concern to the party, the government and the public. In Xi'an, due to the sudden shutdown of the municipal water supply, the urine and feces of the citizens' toilets were sucked into the municipal water supply pipes. When the municipal water supply resumed, many Citizens turned on the faucets, and toilet paper and excrement flowed out of major water resource pollution accidents. Reclaimed water also occurred in Tianjin, and accidents in which citizens flushed toilet water returned to the water supply network. Some residents in the community were forced to drink reclaimed water for a long time, The constant conflicts in the municipal water supply department have caused damage to the health of citizens, serious damage to the water body, water s...

AI Technical Summary

Problems solved by technology

[0002] At present, the safety of urban water supply has become a matter of great concern to the party, the government and the public. In Xi'an, due to the sudden stop of the municipal water supply, the urine and feces of the citizens' toilets were sucked into the municipal water supply pipes. When the municipal water supply was resumed, many Citizens turned on the faucets, and toilet paper and excrement flowed out of major water resource pollution accidents. Reclaimed water also occurred in Tianjin, and accidents in which citizens flushed toilet water returned to the water supply network. Some residents in the community were forced to drink reclaimed water for a long time, and The constant contradictions in the municipal water supply department have caused damage to the health of citizens, serious damage to water bodies, water supply pipe networks and equipment, and severe impacts. Such cases are common in other cities. Therefore, the Ministry of Construction of my country requires that installations be installed where backflow may occur. Anti-backflow facilities, but there has never been a solution to the water supply terminals represented by citizens' homes. Governments around the world are well aware of the importance of this type of problem, but they cannot guarantee the water safety of residents, which brings great safety to the water supply of the entire town Hidden danger

Because ordinary citizens directly connect the water meter after the municipal clean water enters the house, the outlet of the water meter may be directly hidden in the wall, and there is no space. If other equipment is to be installed, the wall will be destroyed. If it is not installed, backflow pollution will occur at any time, and there are endless problems

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