CN201003963Y - Steam quality flow meter - Google Patents

Abstract

The utility model relates to a measuring instrument filed, in particular to a steam mass flow meter. The overseas general use steam mass flow meter has the shortcomings of only being used for measuring the quality of the high temperature and high pressure air with low measuring accuracy and large energy loss for measuring the over heated stream, damp saturated vapor, saturated stream, water, oil and other liquids, in particular, for measuring the flow with minor pipe diameter, high temperature and high pressure. The proposal of the utility model is to provide a steam mass flow meter for measuring the high temperature and high pressure flow with the advantages of high accuracy and little energy loss. The technical proposal is that the steam mass flow meter comprises an outer tube, power supply, a differential pressure transmitter, an intelligent display table and a condenser; a primary element with high precision is arranged inside the outer tube; the primary element is a blind tube with one end closed; a little hole which is able to gain the different pressure of outside and inside is arranged on the surface of the primary element. The utility model has the advantages of wide suitable range, little pressure loss, high precision, high reliability, wide measuring range, being capable of telecommunication and convenient for mounting.

Description

Steam quality flowmeter

The technical field choosing

The utility model relates to the gauging instrument field, is specifically related to a kind of steam quality flowmeter.

Background technology

Enhancing along with energy crisis consciousness taps a new source of energy, and original energy resource system energy efficiency has become a kind of trend.The external steam quality flowmeter that generally uses can only be used for measuring the quality of high temperature and high pressure gas.But for superheated vapor, wet saturated vapor, saturated vapour, water, oil and other fluid, especially to the measurement of less caliber, high temperature, high-pressure fluid flow, its measuring accuracy is not high, energy loss is big.

Summary of the invention

The purpose of this utility model is to provide a kind of high-temperature, high pressure fluid flow accuracy height, steam quality flowmeter that energy loss is little measured.

In order to achieve the above object, the technical solution adopted in the utility model is:

Steam quality flowmeter, comprise outer tube 1, power supply 2, differential pressure transmitter 3, intelligent display table 4, condenser 5, its special character is: a high precision primary element 6 is set in the outer tube 1, and it is the blind pipe of end sealing, and its surface is provided with the hole 7 that can obtain inside and outside differential pressure.

The head of above-mentioned outer tube 1 is a ball-type.

A uniform 2-8 hole 7 on the surface of above-mentioned primary element 6.

The diameter in above-mentioned primary element 6 lip-deep holes 7 is 0.5mm-4mm.

The diameter of above-mentioned outer tube 1 is 10mm-150mm.

Compared with prior art, advantage of the present utility model is as follows:

1, the high precision speed-measuring element is widely used in the flow of various fluids such as duct survey air, water, oil, coal gas, steam, rock gas;

2, the pressure loss is little, and orifice plate and so on measuring sensor pressure loss can be ignored relatively;

3, precision height under the load variations, still can keep high-acruracy survey significantly, and precision does not hang down 3% under the rated flow of 3%-110%;

4, easy for installation, integration apparatus only needs the connecting tube energized to use, and does not need too thick, oversize straight pipeline;

5, reliability height;

6, intellectual, can directly show parameters such as flow by digital instrument;

7, measurement range is wide, and the medium temperature degree reaches 600 degrees centigrade, pressure 20MPa, 0.2 ton/hour-30 tons/hour of flows;

8, can carry out telecommunication, can reach central control room measuring number.

Description of drawings

Fig. 1 is the utility model partial structurtes synoptic diagram;

Fig. 2 is the utility model system equipment scheme synoptic diagram.

Embodiment

Of the present utility modelly provide a kind of high-temperature, high pressure fluid flow accuracy height, steam quality flowmeter that energy loss is little measured.Its structure comprises outer tube 1, power supply 2, differential pressure transmitter 3, intelligent display table 4, condenser 5 etc., and a high precision primary element 6 is set in its outer tube 1, and it is the blind pipe of end sealing, and its surface is provided with the hole 7 that can obtain inside and outside differential pressure.The head of above-mentioned outer tube 1 is a ball-type.A uniform 2-8 hole 7 on the surface of the utility model primary element 6, the diameter in primary element 6 lip-deep holes 7 is 0.5mm-4mm.The diameter of above-mentioned outer tube 1 is 10mm-150mm.

During measurement, obtain pressure reduction, utilize differential pressure transmitter to be transformed to standard signal from the primary element 6 lip-deep holes 7 that place fluid.By following formula:

$u=A\sqrt{\frac{2\·\mathrm{\ΔP}}{\mathrm{\ρ}}}$

Calculate the pipeline internal medium flow velocity.Wherein density p is calculated (as need high-acruracy survey more, only need to change temperature+differential pressure and be modified to differential pressure+differential pressure correction) by temperature+differential pressure difference table in the intelligent display instrument, coefficient A by intelligence instrument under certain parameter automatically calculation draw.Through behind the intelligence instrument, by parameter values such as the direct display quality flows of digital display instrument.

The utility model meets theoretical foundation, can satisfy need of real project, accurately, reliably.

Claims (5)

1, a kind of steam quality flowmeter, comprise outer tube (1), power supply (2), differential pressure transmitter (3), intelligent display table (4), condenser (5), it is characterized in that: a high precision primary element (6) is set in the described outer tube (1), it is the blind pipe of end sealing, and its surface is provided with the hole (7) that can obtain inside and outside differential pressure.

2, steam quality flowmeter according to claim 1 is characterized in that: the head of described outer tube (1) is a ball-type.

3, steam quality flowmeter according to claim 1 and 2 is characterized in that: on the surface of described primary element (6) a uniform 2-8 hole (7).

4, steam quality flowmeter according to claim 3 is characterized in that: the diameter in the lip-deep hole of described primary element (6) (7) is 0.5mm-4mm.

5, steam quality flowmeter according to claim 3 is characterized in that: the diameter of described outer tube (1) is 10mm-150mm.

Images