Differential pressure integrated microflow metering compensation valve

Abstract

The invention relates to a differential pressure integrated microflow metering compensation valve which is used in matching with a fluid metering device, can measure minute flow rate and improve the sensitivity of the metering device. The compensation valve is characterized in that a rubber differential pressure integrating sleeve is arranged on the inner wall of the entering end of the valve body; the rubber differential pressure integrating sleeve is provided with a front tooth ring and a rear tooth ring, the cross section of which is in tooth shape; the front tooth ring and the rear tooth ring are respectively matched with a valve plug which moves into the rubber differential pressure integrating sleeve to form elastic dynamic transition sealing. The compensation valve of the inventionmainly uses the elastic deformation of the rear tooth ring of the rubber differential pressure integrating sleeve to improve the differential pressure of the two cavities of the valve, thus magnifying surge phenomenon in the starting process of the valve, generating a transient pulsed water pressure to lead a metering mechanism to rotate and count. The compensation valve of the invention can be used in matching with any meter and improve the metering precision, has one-way non-return function, strong adaptability to water quality, favorable anti-creeping performance, compact and simple structure, good reliability and long service life.

Description

technical field [0001] The invention relates to a one-way cut-off valve, in particular to a pressure difference integral type micro-flow metering compensating valve which is used with a fluid metering device and can measure tiny flows and improve the sensitivity of the metering device. Background technique [0002] At present, due to the limitation of the sensitivity of the meter, it is impossible to accurately measure the micro-flow in the form of a drip, resulting in a measurement error between the total meter and the sub-meter. [0003] ZL200420007388.X discloses a non-drip water meter and its л-shaped rod control valve. Separated from the ground, a water jacket is installed in the water outlet of the water meter case, and a rotatable л-shaped rod is installed in the water outlet jacket. The problem that this patent exists is: 1, the outlet end of water meter is only check valve structure actually, still can't solve the leak meter phenomenon of micro-flow. 2. It is nece...

AI Technical Summary

Problems solved by technology

The problems in this patent are: 1. In fact, the outlet end of the water meter is only a one-way valve structure, which still cannot solve the phenomenon of micro-flow leakage.

2. It is necessary to change the internal structure of the meter (water meter), which brings difficulties to production and maintenance

However, the structure is complex, there are many parts, and the processing precision is high. Because there are many tiny channels in the structure, it is easy to block and affect the use effect.

Images