CN201575831U

CN201575831U - Gas-liquid two-phase-flow PitotBar flow sensor

Info

Publication number: CN201575831U
Application number: CN2009202881874U
Authority: CN
Inventors: 王忠辉; 杨滨; 卑世英
Original assignee: TIELING GUANGMING INSTRUMENT AND METER FACTORY
Current assignee: TIELING GUANGMING INSTRUMENT AND METER FACTORY
Priority date: 2009-12-18
Filing date: 2009-12-18
Publication date: 2010-09-08
Anticipated expiration: 2019-12-18

Abstract

The utility model relates to a gas-liquid two-phase-flow PitotBar flow sensor, which includes a horizontal short circular tube; front and back round holes are formed above the wall of the short circular tube, and a lower round hole is formed below the wall of the short circular tube; a PitotBar flow sensor is inserted in the front round hole; the distance between a total/static pressure hole and the inner tube wall of the insertion point is less than or equal to the radius of the inner circle of the short circular tube; and an electronic liquid-level gauge is arranged between a back round hole formed above the wall of the short circular tube and a lower round hole below the wall of the short circular tube. By utilizing the PitotBar flow sensor and the electronic liquid gauge, differential pressure signals and liquid-level standard electric signals can be output during use; when gas flow exists in gas-liquid two-phase flow in a measuring conveyance pipeline, the electronic liquid-level gauge can measure the liquid level of liquid in gas-liquid two-phase flow in the measuring conveyance pipeline, the actual flow area of gas in gas-liquid two-phase flow can be computed by adopting the liquid level and the inner diameter of the conveyance pipeline, and the gas flow in gas-liquid two-phase flow can be obtained by adopting the actual flow area of gas. The gas-liquid two-phase-flow PitotBar flow sensor can measure the gas flow in the as-liquid two-phase flow.

Description

Gas-liquid two-phase flow Pitotbar flow sensor

Technical field

The utility model relates to the liquid level gauge of the interior liquid of pipeline of a kind of bi toba flow sensor, particularly a kind of bi toba flow sensor.

Background technology

The bi toba flow meter is to adopt the pitot tube principle to extract the total head and the static pressure signal at fluid-transporting tubing axis place, total head and static pressure signal are introduced differential pressure transmitter, in differential pressure transmitter, difference by total head and static pressure obtains dynamic pressure, dynamic pressure input integrating instrument, calculate rate of flow of fluid in conjunction with the density of fluid by dynamic pressure at flow integrator,, calculate the fluid flow in the fluid-transporting tubing and show again in conjunction with the internal diameter of fluid-transporting tubing, the temperature and pressure of fluid.Pitot crust fluid flow is in respect of bi toba flow sensor and differential pressure transmitter.Bi toba flow sensor has intubate, the lower end of intubate has at opposite radially pitot hole of sustained height upper shed direction and baroport radially, total head passage that communicates with pitot hole and the static pressure passage that communicates with baroport are arranged in the intubate, and there are total head outlet that communicates with the total head passage and the static pressure outlet that communicates with the static pressure passage in the upper end of intubate.During use, the tube wall of bi toba flow sensor intubate from the detected fluid pipeline vertically inserted in the fluid-transporting tubing of level, allow pitot hole and baroport on the axis of fluid-transporting tubing, the stream that pitot hole faces fluid comes direction, baroport is facing to the diffluence direction of fluid, when fluid flows in fluid-transporting tubing, the total head and the static pressure signal of fluid in total head outlet and the static pressure outlet difference output channel, outlet links to each other with the input end of differential pressure transmitter with static pressure the total head outlet with connecting pipe, differential pressure transmitter can draw flow rate of fluid according to the total head and the static pressure of fluid, multiply by the sectional area of pipeline again with flow rate of fluid, can calculate and export the flow of fluid.Bi toba flow sensor is the gas flow that is used in the pipeline of measuring the two-phase fluid medium of carrying gas, liquid mixing sometimes, as be used in the flow of measuring water vapor in the stream-liquid two-phase flow body medium conveyance conduit of water vapor and saturation water, owing in the conveyance conduit stream-liquid two-phase flow is arranged, flow of liquid will occupy certain pipeline section, and the method that multiply by the sectional area of pipeline with above-mentioned flow velocity is measured in the conveyance conduit has the gas flow of biphase gas and liquid flow inaccurate.In the prior art, there is not to have in the energy measurement conveyance conduit bi toba flow sensor of the gas flow of biphase gas and liquid flow.

Summary of the invention

The purpose of this utility model is in order to overcome above-mentioned deficiency, to propose to have in a kind of energy measurement conveyance conduit the gas-liquid two-phase flow Pitotbar flow sensor of the gas flow of biphase gas and liquid flow.

The utility model is realized with the following method.

Gas-liquid two-phase flow Pitotbar flow sensor has the short pipe of level, the front end of short pipe is a fluid intake, the rear end of short pipe is a fluid egress point, before the top of short tube wall has, back circular hole, there is the following circular hole of back round hole axial on same straight line of axis and short tube wall top the below of short tube wall, be inserted with bi toba flow sensor on the preceding circular hole with the axis normal of lacking pipe, the pitot hole of bi toba flow sensor and baroport are in pipe, the aperture of the pitot hole of bi toba flow sensor is towards the fluid intake of short pipe, the aperture of the baroport of bi toba flow sensor is towards the fluid egress point of short pipe, distance between pitot hole and baroport and the insertion point inner tubal wall is connected with the electronic level meter smaller or equal to radius of a circle in the short pipe between the following circular hole of the back circular hole of short tube wall top and short tube wall below.

During installation, the internal diameter of the short pipe of the utility model is identical with the internal diameter of tested gas-liquid two-phase fluid conveyance conduit.The utility model will be connected on the horizontal segment of tested gas-liquid two-phase fluid conveyance conduit, the total head outlet of bi toba flow sensor output is linked to each other with the static pressure inlet with the total head inlet of differential pressure transmitter respectively with the static pressure outlet, the standard electric signal output part of differential pressure transmitter is linked to each other with flow integrator, the standard electric signal output part of electronic level meter is linked to each other with flow integrator.

During use, differential pressure transmitter according to bi toba flow sensor input total head and the standard electric signal of static pressure output differential pressure to flow integrator, the electronic level meter is exported the standard electric signal of the liquid level in the tested gas-liquid two-phase fluid conveyance conduit to flow integrator, flow integrator is according to the differential pressure standard electric signal from the differential pressure transmitter input, calculate the gas flow rate of gas-liquid two-phase fluid, according to the liquid level standard electric signal in the gas-liquid two-phase fluid conveyance conduit of electronic level meter input, the liquid that the certain altitude liquid level is arranged in the pipeline, be equivalent to have in this circular pipe cross section highly is that the bow-shaped cross-section of liquid level is occupied by liquid, cutting bow-shaped cross-section with the sectional area of conveyance conduit is gas actual circulation area, multiply by gas actual circulation area with above-mentioned gas flow rate then, can obtain the gas flow in the gas-liquid two-phase fluid conveyance conduit.

When detected fluid is a kind of fluid in the conveyance conduit, inserting the pitot hole of the bi toba flow sensor in the conveyance conduit and the axis of baroport is on the axis of conveyance conduit, and promptly the distance between pitot hole and baroport and the conveyance conduit insertion point inner tubal wall equals cross section radius of a circle in the conveyance conduit.

Because tested fluid is a gas-liquid two-phase fluid, in different gas-liquid two-phase fluids, the amount of liquid is different, so the distance between the pitot hole of the bi toba flow sensor in the short pipe of insertion and baroport and the short pipe insertion point inner tubal wall can be selected in the radius of a circle in smaller or equal to short pipe by the size of amount of liquid in the gas-liquid two-phase fluid.

The utility model has bi toba flow sensor and electronic level meter, can export gas differential pressure signal and liquid level standard electric signal in the fluid-transporting tubing in use, when in measuring conveyance conduit, the gas flow of biphase gas and liquid flow being arranged, the electronic level instrumentation measures the liquid level of liquid in the interior biphase gas and liquid flow of conveyance conduit, the gas actual flow that can calculate biphase gas and liquid flow with liquid level and conveyance conduit internal diameter draws the comparatively accurately gas flow of biphase gas and liquid flow with the gas actual flow through area through area.The gas flow that biphase gas and liquid flow is arranged in the utility model energy measurement conveyance conduit.

Below in conjunction with accompanying drawing, the utility model is further described.

Description of drawings

Fig. 1 cuts open synoptic diagram according to the master office of looking of a kind of gas-liquid two-phase flow Pitotbar flow sensor of invention scheme proposition of the present utility model;

Fig. 2 is the schematic side view of Fig. 1.

Embodiment

Fig. 1, among Fig. 2, gas-liquid two-phase flow Pitotbar flow sensor has the short pipe 1 of level, the front end of short pipe is a fluid intake 2, the rear end of short pipe is a fluid egress point 3, before the top of short tube wall has, back

circular hole

4,5, there is the following circular hole 6 of back round hole axial on same straight line of axis and short tube wall top the below of short tube wall, be inserted with bi toba flow sensor 7 on the preceding circular hole with the axis normal of lacking pipe, the pitot hole 8 of bi toba flow sensor and baroport 9 are in pipe, the aperture of the pitot hole of bi toba flow sensor is towards the fluid intake of short pipe, the aperture of the baroport of bi toba flow sensor is towards the fluid egress point of short pipe, distance D between pitot hole and baroport and the above-mentioned short pipe insertion point inner tubal wall is connected with electronic level meter 10 smaller or equal to radius of a circle in the short pipe between the following circular hole of the back circular hole of short tube wall top and short tube wall below.

Claims

1. gas-liquid two-phase flow Pitotbar flow sensor, it is characterized in that: the short pipe that level is arranged, the front end of short pipe is a fluid intake, the rear end of short pipe is a fluid egress point, before the top of short tube wall has, back circular hole, there is the following circular hole of back round hole axial on same straight line of axis and short tube wall top the below of short tube wall, be inserted with bi toba flow sensor on the preceding circular hole with the axis normal of lacking pipe, the pitot hole of bi toba flow sensor and baroport are in pipe, the aperture of the pitot hole of bi toba flow sensor is towards the fluid intake of short pipe, the aperture of the baroport of bi toba flow sensor is towards the fluid egress point of short pipe, distance between pitot hole and baroport and the insertion point inner tubal wall is connected with the electronic level meter smaller or equal to radius of a circle in the short pipe between the following circular hole of the back circular hole of short tube wall top and short tube wall below.