Water meter protection valve

Abstract

The invention discloses a water meter protection valve. The water meter protection valve comprises a valve body, a valve deck, a valve rod and a gate plate connected with the bottom end of the valve rod. A water inlet end and a water outlet end are arranged at the two ends of the valve body correspondingly. A water flowing channel for allowing a medium to circulate is arranged in the valve body, and a cavity communicating with the water flowing channel is formed in the position, located on the side, opposite to the water outlet end, of the valve plate, in the valve body. A check mechanism is further included and comprises a valve element, a sealing ring, a pressing ring, a spring and a positioning ring, and the sealing ring, the pressing ring, the spring and the positioning ring are arranged in the cavity and sequentially sleeve the valve element towards the water outlet end. A convex ring which is located in the water flowing channel and abuts against the sealing ring is arranged on the outer circumferential wall of the valve element. The sealing ring is located at the communicating position of the water flowing channel and the cavity, and used for controlling the water flowing channel and the cavity to communicate or be disconnected. According to the water meter protection valve, the phenomena of water meter rotation and reversion caused by the differential pressure of a pipenetwork can be solved; and meanwhile the minimum start-up flow rate of the valve is larger than that of a water meter, and the problem that household water is leaked can be solved.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a water meter protection valve. Background technique [0002] Our country is a water-scarce country. In our daily life, when we turn on the faucet, the water will flow out continuously, and we may not feel the water crisis at all. But in fact, the water we depend on for survival is becoming increasingly scarce. Controlling water supply leakage is one of the important symbols of creating a water-saving city. According to estimates, the average leakage rate of pipe network in my country's urban public water supply systems reaches 21.5%. Therefore, how to reduce the leakage rate of urban water supply pipe network and reduce the waste of water resources has become the top priority of water supply work. Reducing the leakage rate of water supply pipe network is an effective way to save water resources. The valve in front of the water meter of household users frequently leaks, resulti...

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Problems solved by technology

[0004] Based on the above problems, the purpose of the present invention is to provide a water meter protection valve that can solve the phenomenon of water meter rotation and reversal caused by the pressure difference of the pipe network, and at the same time, the minimum start-up flow of the valve is greater than the minimum start-up flow of the water meter, which can solve the problem of dripping of residential water.

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