High-pressure resistant and corrosion resistant turbine flowmeter

Abstract

The invention relates to a high-pressure resistant and corrosion resistant turbine flowmeter. A circle of a conical surface I is arranged at the outer part of one end of a connection pipe joint of each high-pressure hermetical structure; a groove is formed in each conical surface I; an O-shaped ring is arranged in each groove; a conical surface II is arranged at the outer part of the other end of the connection pipe joint of the high-pressure hermetical structure; a compressing nut is arranged on each connection pipe; one end of a pre-amplifier is connected with the signal output terminal of a sensor; the two high-pressure hermetical structures are in screw connection with the fluid inlet I and the fluid outlet II of the sensor through the compressing nuts; the conical surface I of the connection pipe joint at one end is in fastened fit with a conical opening of the fluid inlet I of the sensor, and the conical surface I of the connection pipe joint at the other end is in fastened fit with a conical opening of the fluid outlet II of the sensor; an impeller of the sensor is made of duplex stainless steel; the impeller shaft of the sensor is made of high-hardness elastic alloy; the impeller shaft can meet the requirements of abrasion resistance and corrosion resistance at the same time; the impeller can meet the requirements of magnetic conductivity and corrosion resistance at the same time; a conical surface hermetical structure can meet the requirement of high pressure of 40 MPa.

Description

technical field [0001] The invention relates to a turbine flowmeter, in particular to a high-pressure and corrosion-resistant turbine flowmeter. Background technique [0002] Turbine flowmeter is the main type of velocity flowmeter. When the measured fluid flows through the sensor, under the action of the fluid, the impeller rotates under force, and its rotational speed is proportional to the average flow velocity of the pipeline. At the same time, the blade periodically cuts the electromagnetic The iron produces magnetic force lines. According to the principle of electromagnetic induction, a pulsating potential signal will be induced in the coil, and the standard current signal will be obtained after the amplifier converts the output. [0003] Turbine flowmeter has the advantages of simple structure, light weight, convenient maintenance, good repeatability and high precision, and is widely used in petroleum, chemical, metallurgy, papermaking and other industries. At the sa...

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Problems solved by technology

At the same time, due to its own structural characteristics, it also limits its application in special environments.

For example, the material of the impeller has a requirement for magnetic conductivity. Traditional impellers are mostly made of martensitic stainless steel, which has good magnetic conductivity and poor corrosion resistance; the impeller shaft has requirements for hardness and wear resistance. Good abrasiveness, corrosion resistance often cannot meet the requirements; traditional high pressure mainly adopts higher strength flange and metal ring gasket seal, which is not suitable for small diameter and greatly increases the manufacturing cost

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