The flow of vapour-liquid or gas-liquid two-phase fluid and dryness measurement device
One. technical field: the utility model belongs to the fluid measurement technology type.It is specifically related to the structure of the flow and the dryness measurement device of two-phase fluid.
Two. background technology: vapour-liquid or gas-liquid two-phase fluid are widely used in heavy oil development, power, chemical industry and the nuclear reactor field of oil exploitation as a kind of secondary energy efficiently.The real-time online measuring of flow, total flow and the mass dryness fraction of each phase of stream-liquid two-phase flow body is puzzlement people's an international technical barrier always.Annually in the world fail to obtain the economic loss that accurate measurement causes because of high pressure stream-liquid two-phase flow body and be difficult to estimate, especially the economic loss in thick oil filling vapour Simulation on whole pay zones is even more serious.Though the existing patented technology of this aspect is arranged, have because of complex structure, have because of measuring accuracy does not reach industrial requirements, or fail to realize that truly flow and mass dryness fraction biparametric measure simultaneously, do not see as yet that so far have can be for the product of commercial Application.U.S. Texaco Petroleum Maatschappij (Netherland) B.V once developed a kind of orifice plate-critical flow nozzle combined type dryness of wet steam meter (U.S. Pat 4836032) the eighties, but the pressure loss that causes because of critical flow nozzle causes this technology to fail to be used widely up to 50%.
Three. summary of the invention: the purpose of this utility model is for overcoming special this programme---the flow and the dryness measurement device of vapour-liquid or gas-liquid two-phase fluid of proposing of technical matters that measurement mechanism exists in the prior art, it by in the measuring channel in the dynamic head of restriction device both sides, vertical pipe the numerical value of 2 statical head and static pressure can obtain the measurement numerical value of flow and mass dryness fraction exactly after treatment, can realize real-time online measuring with simple device.
By as above design, the flow of vapour-liquid provided by the utility model or gas-liquid two-phase fluid and dryness measurement device, it includes measuring channel, dynamic and static pressure measuring point and display, it is characterized in that in its measuring channel, being installed with restriction device, its dynamic pressure measuring point is located at the both sides of restriction device, its hydrostatic measuring point is located on the vertical pipeline section, point-to-point transmission has certain distance, and driven differential pressure pickup, differential static pressure sensor, static pressure transducer gained the data flow and the mass dryness fraction of gained after treatment show on display.
In this programme, its restriction device is a kind of in orifice plate, nozzle or the Venturi tube, and its hole shape is standard, off-gauge or other opening shape.When its measuring channel was the pipeline of square, hydrostatic measuring point was placed on the vertical pipeline section, can be provided with the static mixer that impels two-phase fluid to mix in measuring channel.
Adopt this programme can embody following superiority: 1. this measurement mechanism is to measure statical head on 2 of vertical measuring channel, measure dynamic head in the restriction device both sides, can record total flow after the machine software processes as calculated, the flow of each phase and mass dryness fraction numerical value, it has realized online kinetic measurement, can obtain the demonstration of a plurality of parameters simultaneously; 2. it has desirable mathematical model and software for calculation and can finish complicated calculating, causes its physical construction very simple, and the cost of equipment can reduce significantly; 3. it can report out accurate measurement result, and the measuring error that reaches total flow and mass dryness fraction is lower than 2% and 4%; 4. the inner movement-less part of this measurement mechanism makes that resistance is little, loss is little, can be used for the real-time online measuring of interior vapour-liquid of high, medium and low pressure pipe or gas-liquid two-phase fluid-mixing, is worth of widely use.
Four. description of drawings: Fig. 1 is the flow of this programme vapour-liquid or gas-liquid two-phase fluid and the structural representation of dryness measurement device.
Fig. 2 and Fig. 3 are the structural representations of the other embodiment of this programme.Its measuring channel is the structure of square.Its hydrostatic measuring point is located in the vertical pipeline section.
Five. embodiment: this programme has solved the real-time online measuring of two-phase fluid-mixing multiparameter, has outstanding superiority.It by the ring flange 1 of the connection usefulness at measuring channel 3, two ends, restriction device 2, dynamic pressure measuring point 7, hydrostatic measuring point 7 ', moving pressure differential deltap P1 sensor 4, differential static pressure Δ P2 sensor 6, static pressure P sensor 5 and display 8 formed, and the static mixer 9 for two-phase fluid is mixed also can be housed in pipeline.Its measuring channel is vertical pipeline, also can be the pipeline of square, and its restriction device can be orifice plate, nozzle or Venturi tube, and its hole shape can be the shape of standard, off-gauge or other various openings.Two hydrostatic measuring points are located in the vertical pipe, keep certain distance, the dynamic pressure measuring point is arranged in the both sides of restriction device, moving pressure differential deltap P1 sensor links to each other with two dynamic pressure measuring points, differential static pressure Δ P2 sensor links to each other with two hydrostatic measuring points, can obtain the measurement numerical value of flow and mass dryness fraction it is handled the numerical value of dynamic pressure gap sensor, differential static pressure sensor and static pressure transducer in computing machine after and directly demonstration on display.It has all losses simple in structure, that data accurate, movement-less part causes, can accomplish online real-time measuring characteristic that this preproduction is through the favorable comment that obtains the user on probation.