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Gas roots type flow meter

A technology of Roots flowmeter and flowmeter, which is applied in the field of flow meter, can solve the problem of inaccurate alarm judgment, and achieve the effect of accurate alarm, avoidance of damage and good stability.

Active Publication Date: 2012-10-31
ZHEJIANG CANGNAN INSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly aims at the problem of inaccurate alarm judgment existing in the existing alarm flowmeter, and provides a gas Roots flowmeter with high alarm accuracy and blocked gas that can be discharged from the bypass

Method used

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Examples

Experimental program
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Embodiment

[0026] Attached to the manual figure 1 As shown, a gas Roots flowmeter includes a flowmeter body 1, a differential pressure seat 3 and a signal trigger mechanism 4 arranged on the flow body 1. The flowmeter body 1 is provided with a straight channel 2 for gas to pass through. , the two ends of the straight channel 2 are provided with double waist wheels, and the upper end of the differential pressure seat 3 is screwed with a communicating pressure joint 35, as shown in the appendix of the manual. Image 6 As shown, a three-way valve 28 is arranged above the pressure joint 35, the pressure joint 35 and one valve port of the three-way valve 28 are fixed by a nut, and the other valve port of the three-way valve 28 is connected with a conduit 5, and the conduit 5 extends to the straight channel 2, the conduit 5 and the valve port of the corresponding three-way valve 28 are fixed by nuts, the remaining valve port of the three-way valve 28 is provided with a large diameter section, ...

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Abstract

The invention relates to a gas roots type flow meter with functions of alarm and bypass. The flow meter comprises a differential pressure base, a signal trigger mechanism and a flow meter body, wherein two ends of a cut-through channel are respectively provided with a waist wheel, the differential pressure base is communicated with an air inlet end through a conduit, the differential pressure base is internally provided with an elastic leather membrane, the differential pressure base is connected with a universal driving shaft fixed with the leather membrane, the universal driving shaft is hinged with an elastic pinch plate of which one end is provided with a hook angle, the cut-through channel is internally provided with a valve seat, a valve rod is arranged on the valve seat, a restoring spring is connected between the valve rod and the valve seat, a valve clack is fixedly arranged on the valve rod, the valve clack is connected with a hook angle of the elastic pinch plate in a clamping way, the signal trigger mechanism comprises a magnetic steel support column, and the magnetic steel support column leans against one end of the valve rod which is far away from the valve clack. The gas roots type flow meter has the benefit effects that 1. after the flow meter has fault, a bypass device starts, and gas directly passes through the cut-through channel, so that the gas supply of upstream gas equipment can be guaranteed within a short time; and 2. the valve rod is separated from the magnetic steel support column, so that the signal trigger mechanism transmits a signal so as to promote workers to maintain the flow meter.

Description

technical field [0001] The invention relates to a flow meter, in particular to a gas roots flowmeter with alarm and bypass functions. Background technique [0002] Gas Roots flowmeter is a volumetric flow meter that accurately measures gas flow. It has the characteristics of high precision, good reliability, light weight, long life, and low operating noise. It is suitable for measuring natural gas, city gas, propane, and nitrogen. , industrial inert gas and other non-corrosive gases, widely used in gas business settlement in catering, hotel and other industries, gas measurement in transmission and distribution pipeline network, gas pressure regulation station measurement, industrial and civil boilers and other gas measurement. [0003] The working principle of the gas Roots flowmeter is as follows: when the gas passes through the flowmeter, a pressure difference is generated at the inlet end and the outlet end, which acts on the double waist wheel connected with the high-pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F11/28
Inventor 林景殿章圣意肖云孔
Owner ZHEJIANG CANGNAN INSTR GRP CO LTD
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