A kind of oil gas flowmeter
Technical field
The utility model relates to a kind of flowmeter that oil gas is measured that is exclusively used in, and belongs to flow measurement technology field.
Background technology
In recent years, refuelling station's secondary oil gas recovery transformation has all been carried out in the most areas of China.In order to guarantee the effect of secondary oil gas reclaiming system.In national standard, the gas liquid ratio scope of secondary oil gas reclaiming system has been carried out to clearly regulation.And want accurately to measure the gas liquid ratio of secondary oil gas reclaiming system, just must first to returning to the product vapour volume of storage tank in refueling process, measure.
In practical application, because the installing space in fuel charger is limited, often not longer upstream and downstream straight length, causes a lot of conventional instruments all cannot apply.
In addition, because the component of product vapour is uncertain, pressure is low, and flow is little, has condensation when temperature is lower, and also often error is all larger when measuring for oil gas to cause traditional thermal flowmeter, ultrasonic flowmeter etc.
Utility model content
Based on above-mentioned technical matters, the utility model provides a kind of oil gas flowmeter.
The technical solution that the utility model adopts is:
A kind of oil gas flowmeter, comprise the first thermal sensor, the second thermal sensor, concentration sensor and the measuring channel that can be crossed by hydrocarbon flow, on the first thermal sensor, be provided with gas hot type probe, on the second thermal sensor, be provided with liquid hot type probe, on concentration sensor, be provided with concentration probe, gas hot type probe, liquid hot type probe is arranged in measuring channel with concentration probe, the first thermal sensor, the second thermal sensor is all connected signal condition collector with concentration sensor, signal condition collector connects central controller, central controller connects on-the-spot display unit, current output unit and/or pulse output unit.
Preferably, described gas hot type probe, liquid hot type probe are popped one's head in and are all vertically mounted on the center section of measuring channel with concentration, control when measuring channel horizontal positioned and gas hot type probe are all positioned at the top of measuring channel with liquid hot type probe the free end position of popping one's head in lower than gas hot type in the free end position of liquid hot type probe.
Preferably, the upstream port at measuring channel is provided with filter screen.
Useful technique effect of the present utility model is:
In the utility model, gas hot type probe is mainly used in measuring the flow of oil gas under normal circumstances, because the specific heat of the oil gas of variable concentrations is different, the error of bringing in order to compensate gas concentration, the utility model also adopts a concentration probe to carry out on-line measurement to gas concentration, separately by liquid hot type, pop one's head in detection flows flowmeter measurement pipeline whether have liquid, and measurement data is compensated; Above-mentioned measurement data, after signal condition collector and central controller processing, can directly on-the-spotly show or upload to miscellaneous equipment through electric current output, pulse output.The utility model can carry out accurate measurement to oil gas volume, has the advantages such as measuring accuracy is high, with low cost, stable and reliable for performance, life-span length, the requirement of supreme lower straighttube section.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
Fig. 1 is that the structure of the utility model oil gas flowmeter connects block diagram;
Fig. 2 illustrates the arrangenent diagram in measuring channel such as gas hot type probe, liquid hot type probe in the utility model.
In figure: 1-measuring channel, 2-gas hot type probe, 3-liquid hot type probe, 4-concentration probe, 5-filter screen, the on-the-spot display unit of 6-.
Embodiment
By reference to the accompanying drawings, a kind of oil gas flowmeter, comprises the first thermal sensor, the second thermal sensor, concentration sensor and the measuring channel 1 that can be crossed by hydrocarbon flow.On the first thermal sensor, be provided with gas hot type probe 2, on the second thermal sensor, be provided with liquid hot type probe 3, on concentration sensor, be provided with concentration probe 4, gas hot type probe 2, liquid hot type probe 3 are installed in measuring channel 1 with concentration probe 4.The first thermal sensor, the second thermal sensor are all connected signal condition collector with concentration sensor, and signal condition collector connects central controller, and central controller connects on-the-spot display unit, current output unit and/or pulse output unit.
During practical application, oil gas flowmeter can at right angle setting, also can level install.Gas hot type probe 2 and liquid hot type probe 3 be preferred MEMS micro-electromechanical technology hot type probe all, and this probe has the advantages such as volume is small and exquisite, stable performance, sensitivity height.Wherein, gas hot type probe 2 is mainly used in measuring the flow of oil gas under normal circumstances, because the specific heat of the oil gas of variable concentrations is different, the error of bringing in order to compensate gas concentration, the utility model also adopts 4 pairs of gas concentrations of an integral type concentration probe to carry out on-line measurement.Another liquid hot type probe 3 is used for whether having liquid in detection flows flowmeter measurement pipeline, and measurement data is compensated.Above-mentioned measurement data, after signal condition collector and central controller processing, can directly show or upload to miscellaneous equipment through 4~20mA current output unit, pulse output unit through on-the-spot display unit.
As to further improvement of the utility model, above-mentioned gas hot type probe 2, liquid hot type probe 3 and concentration probe 4 are all vertically mounted on the center section of measuring channel 1, at the two ends of sensor probe, have reserved the upstream and downstream straight length of sufficient length.And control and to pop one's head in 3 while being all positioned at the top of measuring channel 1 when measuring channel 1 horizontal positioned and gas hot type probe 2 and liquid hot type, the free end position of liquid hot type probe 3 is lower than the free end position of gas hot type probe 2, thereby entering of measuring channel 1 interior liquid can be more early found in assurance.
Further, at the upstream port of measuring channel 1, be provided with filter screen 5, filter screen 5 can effectively prevent that the impurity carrying in oil gas from entering measuring channel 1, guarantees measuring channel 1 cleaning inside.
The relevant technologies content of not addressing in aforesaid way is taked or is used for reference prior art and can realize.
It should be noted that, under the instruction of this instructions, any equivalents that those skilled in the art have done, or obvious variant, all should be within protection domain of the present utility model.