Inlet and discharge combination valve for standard metal gauge

Abstract

The invention relates to a liquid-feeding-discharging combination valve for a standard metal measuring device. The structure of the liquid-feeding-discharging combination valve for the standard metal measuring device comprises a main pipe, a liquid feeding branch pipe, a liquid feeding valve and a liquid discharging valve. The upper end of the main pipe is connected with the bottom connector portion of the standard metal measuring device. The liquid feeding branch pipe is arranged on one side of the main pipe in an inclined mode. A lower end opening of the liquid feeding branch pipe is connected with the main pipe. The horizontal height of an upper end opening of the liquid feeding branch pipe is higher than the horizontal height of the lower end opening of the liquid feeding branch pipe. The liquid feeding valve is arranged on the liquid feeding branch pipe. The liquid discharging valve is arranged on the main pipe. By arranging the liquid feeding valve and the liquid discharging valve in a separated mode, the liquid feeding valve is close to a bottom connector of the standard metal measuring device, and the liquid discharging valve is arranged below the liquid feeding valve. A Y-shaped structure is formed by the liquid feeding branch pipe provided with the liquid feeding valve and the main pipe provided with the liquid discharging valve, so that the measuring detecting requirement that air is not blocked in a metal measuring device during the liquid feeding process, and residues do not exist inside the metal measuring device after liquid discharging is well achieved. After assembling, the design requirement for a high accurate standard metal measuring device is met by the standard metal measuring device.

Description

technical field [0001] The invention relates to a metering tool, in particular to a combined liquid inlet and discharge valve for a standard metal measuring instrument. Background technique [0002] Standard metal gauges (referred to as gauges) are standard devices for measuring the volume of liquids. Standard metal gauges can be divided into first-class standard metal gauges, second-class standard metal gauges and third-class standard metal gauges according to their calibration accuracy; among them, first-class standard metal gauges have the highest calibration accuracy, and second-class standard metal gauges have the highest calibration accuracy. The calibration accuracy of third-class standard metal gauges is the lowest. The standard metal measuring instruments on the market have a setting mode of setting the liquid inlet above the measuring instrument. This kind of measuring instrument will generate a lot of air bubbles during the liquid intake process, which will affec...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a combined valve for inlet and discharge of standard metal gauges to solve the problems of inaccurate detection data, easy leakage of liquid and low detection efficiency caused by the use of three-way valves in existing standard metal gauges.

Images