Oil-water detector based on liquid mass resonance working principle

Abstract

The utility model discloses an oil-water detector based on the working principle of liquid mass resonance, which comprises a pipeline, a detector is assembled above the pipeline, the detector comprises an electronic unit and a sensing part, the sensing part comprises a columnar current carrier, a measuring probe and a resonance body, a columnar cavity is formed in the columnar current carrier, the measuring probe is arranged in the columnar cavity, and the resonance body is arranged in the columnar cavity. A flow guide groove is formed in the periphery of the columnar cavity and used for enabling a medium to flow into the columnar cavity, a measuring probe is assembled in the columnar cavity, and a resonance body is installed in the measuring probe and used for enabling the medium entering the columnar cavity to make contact with the measuring probe. A current carrying body for measurement is provided through the arranged sensing part, the arranged electronic unit has the functions of frequency emission, signal acquisition, data fitting calculation and signal isolation output, and the electronic unit not only generates natural vibration resonant frequency, but also emits electromagnetic short waves to a sensor probe.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil water detection technical field, concretely is a kind of oil water detector based on liquid quality resonance working principle. BACKGROUND

[0002] Liquid quality resonance measurement technology only measures the density and dielectric constant of fluid medium, because the most important parameter for measuring oil content in water is density, dielectric constant, and viscosity and temperature are less important parameters, as long as the density and dielectric constant of fluid are measured accurately, the small oil content in water can be accurately measured, the existing detector cannot accurately detect the small oil content in water, and the parameters of oil content in water are density, dielectric constant. SUMMARY

[0003] To achieve the above object, the utility model is realized by the following technical scheme: including pipeline, the upper portion of pipeline is equipped with detector, and the detector includes:

[0004] Sensing part, the sensing part includes columnar carrier fluid, measurement probe and resonance body, columnar cavity is formed in the columnar carrier fluid, flow guide groove is opened in the periphery of columnar cavity, for making medium flow into columnar cavity, measurement probe is assembled in the inside of columnar cavity, resonance body is installed in the inside of measurement probe, for making medium in columnar cavity contact measurement probe;

[0005] Electronic unit, the electronic unit is used to generate acoustic frequency self-oscillation frequency, for emitting electromagnetic short wave to medium in columnar carrier fluid;

[0006] The measurement probe, resonance body and electronic unit are connected by wire;

[0007] Preferably, the electronic unit includes:

[0008] Frequency transmitting and receiving unit, the frequency transmitting and receiving unit generates acoustic frequency sweep signal, for generating change in self-oscillation frequency when medium concentration changes, wherein the frequency transmitting and receiving unit also emits electromagnetic short wave, for simultaneously changing the energy absorbed by electronic unit when medium concentration changes;

[0009] Signal acquisition unit, the signal acquisition unit is used to collect the frequency emitted by frequency transmitting and receiving unit, and converts into electric signal;

[0010] Data fitting unit, the data fitting unit is used to fit and calculate analysis the data collected by signal acquisition unit, and calculates the change in medium concentration;

[0011] Signal output unit, the signal output unit is used to output the data calculated by data fitting unit.

[0012] Preferably, the resonant natural frequency generated by the detector and the absorbed energy of the emitted electromagnetic shortwave vary with the concentration of the medium, exhibiting a nonlinear curve characteristic.

[0013] Preferably, when the detector detects changes in oil and water content, the natural frequency and transmission power of the electronic unit change simultaneously, and the current value of the internal oscillation source changes accordingly, thereby realizing the determination of the dielectric density and dielectric constant.

[0014] Preferably, the detector is threaded to the pipeline and uses an O-ring seal.

[0015] Beneficial effects

[0016] This invention provides an oil-water detector based on the liquid-mass resonance principle. Compared with existing technologies, this oil-water detector, based on the liquid-mass resonance principle, offers the following advantages: The sensor unit provides the measuring fluid, and the electronic unit functions as frequency transmission, signal acquisition, data fitting and calculation, and signal isolation output. The electronic unit not only generates its own resonant frequency but also emits short-wave electromagnetic waves to the sensor probe. When the medium within the columnar fluid changes, the resonant frequency changes, and the energy absorbed by the short-wave electromagnetic waves changes simultaneously. Data acquisition and data fitting calculations determine the change in medium concentration, and the detector outputs the PPM (parts per mille) value of the oil content in the water. Attached Figure Description

[0017] Figure 1 This is a front cross-sectional view of an oil-water detector based on the liquid-mass resonance working principle described in this utility model.

[0018] Figure 2 for Figure 1 A magnified view of the interior of the measuring probe.

[0019] Figure 3 for Figure 2 Schematic diagram of the middle electronic unit.

[0020] Figure 4 It is a function of dielectric constant and oil content in water.

[0021] Figure 5 The curve represents the dielectric constant as a function of the oil content in the water.

[0022] Figure 6 The curve represents the shortwave superposition resonant polynomial function curve.

[0023] In the diagram: 1. Sensing unit; 101. Measuring probe; 102. Resonator; 103. Columnar fluid carrier;

[0024] 2, electronic unit; 201, frequency transmitting and receiving unit; 202, signal acquisition unit; 203, data fitting unit; 204, signal output unit;

[0025] 3, pipeline. DETAILED DESCRIPTION

[0026] Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative labor belong to the range of protection of the utility model.

[0027] Through the personnel in the art, all electrical components in the case and the power supply matched therewith are connected through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should be completed according to the working order between the electrical components in the working principle described below. The detailed connection means is a common technology in the art, and the working principle and process are mainly introduced below, and the electrical control is not described.

[0028] EMBODIMENT

[0029] The utility model will be specifically described below in combination with the drawings, such as Figures 1-2 As shown in the figure, an oil-water detector based on the liquid quality resonance working principle, comprising a pipeline, a detector is assembled above the pipeline 3, the detector is screw connected with the pipeline 3, and adopts O-ring sealing, the detector comprises an electronic unit 2 and a sensing part 1.

[0030] Specifically, the electronic unit 2 is used to provide self-vibration frequency generated by the resonance body 102, so that the measuring probe 101 emits electromagnetic short waves to the medium in the columnar current-carrying fluid 103, including:

[0031] The frequency transmitting and receiving unit 201 generates an audio frequency sweep signal, which is used to change the self-vibration frequency when the medium concentration changes, wherein the frequency transmitting and receiving unit 201 also emits electromagnetic short waves, which are used to change the energy absorbed by the electronic unit 2 when the medium concentration changes;

[0032] The signal acquisition unit 202 is used to collect the frequency emitted by the frequency transmitting and receiving unit 201 and convert it into an electrical signal.

[0033] The data fitting unit 203 is used to fit and analyze the data collected by the signal acquisition unit 202, and calculate the change of the medium concentration.

[0034] Oil (mineral oil) and water are both electrolytes, and when oil and water are mixed together, they become oil-water mixture. According to the oil continuous phase and water continuous phase, it is divided into water-in-oil phase and oil-in-water phase;

[0035] The signal output unit 204 is configured to output the data calculated by the data fitting unit 203.

[0036] It should be noted that the electronic unit not only generates the self-resonant frequency, but also emits electromagnetic short waves to the sensor probe. When the medium in the sensor columnar carrier fluid changes, the self-resonant frequency changes, and the electromagnetic short wave absorption energy also changes. After data acquisition, the data fitting is performed to calculate the change of the medium concentration, and the PPM content conversion value (0-50000) of the oil content in the fluid medium is output.

[0037] Specifically, the sensing part 1 includes a columnar carrier fluid 103, a measurement probe 101, and a resonant body 102. The columnar carrier fluid 103 forms a columnar cavity therein, and a flow guide groove is formed around the columnar cavity for flowing the medium into the columnar cavity. The columnar cavity is respectively fitted with the measurement probe 101 and the resonant body 102, so that the medium entering the columnar cavity contacts the measurement probe 101, so that the resonant body generates a specific frequency to detect the medium, and transmits the detection data to the electronic unit 2.

[0038] The measurement probe 101 and the resonant body 102 are connected by wires, and the outer surface of the measurement probe is coated with Teflon material, and the tip is connected to the electronic unit circuit latch.

[0039] The electromagnetic short wave frequency emitted by the detector is 4 MHz. The resonant self-resonant frequency generated by the detector and the absorption energy of the emitted electromagnetic short wave change with the concentration of the medium, showing a nonlinear curve characteristic. When the detector detects the change of the oil-water content, the self-resonant frequency and the emission power of the electronic unit 2 change simultaneously, and the internal oscillation source current value changes accordingly, realizing the measurement of the medium density and the dielectric constant.

[0040] According to the attached Figures 1-2 It is concluded that the oil-water detector based on the liquid quality resonance measurement technology based on the working principle of liquid quality resonance adds the resonant technology of measuring the density of the fluid medium to the original short wave absorption technology for measuring the dielectric constant of the fluid medium. It not only has the function of measuring the dielectric constant by short wave, but also increases the characteristics of measuring the density by resonance, which makes up for the disadvantage that the density of oil and water is very close when measuring heavy crude oil by single resonance, resulting in inaccurate measurement. At the same time, it increases the auxiliary measurement calibration parameter of measuring the dielectric constant by short wave absorption method. This superimposed measurement technology for fluid medium is obviously superior to single liquid column resonance principle or single short wave absorption measurement principle in design.

[0041] Physical properties of water-in-oil phase

[0042] The relative density of oil is between 0.7 and 1, and the dielectric constant is between 2.1 and 2.3; the density of water is 1, and the dielectric constant is 81. In the water-in-oil state, water molecules are contained in oil molecules, and an emulsified state can be formed under laboratory conditions. According to experimental data, the change range of the oil content in water detected by the density principle in the water-in-oil state is small, and the sensitivity is low. On the contrary, the change range of the oil content in water detected by the dielectric constant measurement principle is large, and the sensitivity is high. There is a jump point from water-in-oil phase to oil-in-water phase, that is, from one curve to another curve, and the current value jump change is used to distinguish the oil-in-water phase and the water-in-oil phase. When the current value is in the oil-in-water phase, the resonance density method is used for measurement. When the current value is in the oil-in-water phase, the resonance measurement is used for measurement.

[0043] The electronic unit module and the resonance sub-unit assembly installed inside the sensor probe bidirectionally emit two-way electromagnetic shortwave and resonance wave signals with constant amplitude, and then the signals are conducted to the liquid medium in the probe antenna cover through the special sensor probe installed in the dehydrator pipeline. The liquid column resonance and electromagnetic shortwave are generated in the measured liquid medium, and the density (0.1-1.0 mg / cm3), dielectric constant (the dielectric constant of water is 81, and the dielectric constant of oil is 2.3), and temperature (0℃-160℃) of the medium are collected, and the data curve fitting analysis is performed to calculate the oil content in water in the measured liquid medium. In the water-in-oil state, water molecules are contained in oil molecules, and an emulsified state can be formed under laboratory conditions. According to experimental data, the change range of the oil content in water detected by the density principle in the water-in-oil state is small, and the sensitivity is low. On the contrary, the change range of the oil content in water detected by the dielectric constant measurement principle is large, and the sensitivity is high.

[0044] The sensor is only sensitive to the density and dielectric constant of the liquid medium entering the body pipeline cavity, and the lower the oil content in water, the greater the measured signal value. The opening and opening degree of the automatic control valve can be automatically controlled according to the size of the oil content in water, so that the maximum opening degree is quickly and automatically cut off.

[0045] 1、 Figure 4 The function relationship between the dielectric constant of the oil-water mixture and the oil content in water in the oil-in-water state;

[0046] Figure 5 The function curve of the dielectric constant and the oil content in water;

[0047] According to experimental data, the dielectric constant of the medium is more suitable for detecting the oil content in water in the oil-in-water state, the measurement current range is large, the precision is high, and the sensitivity is high.

[0048] 2. There is a jump point from water-in-oil phase to oil-in-water item, that is, from one curve to another curve, and the current value jump changes to distinguish the oil-in-water item and the water-in-oil phase. When the current value is in the oil-in-water item, the resonance density method is used for measurement. When the current value is in the water-in-oil phase, the resonance measurement is superimposed with the short wave absorption method for measurement.

[0049] 3、 Figure 6 Superimpose the resonance polynomial function curve for short wave

[0050] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil-water detector based on the principle of liquid mass resonance, comprising a pipeline, a detector is installed above the pipeline, characterized in that, The detection instrument comprises: a sensing part, which comprises a columnar carrier fluid, a measuring probe and a resonant body, a columnar cavity is formed in the columnar carrier fluid, a flow guide groove is opened around the columnar cavity for flowing medium into the columnar cavity, the measuring probe is assembled in the columnar cavity, and the resonant body is installed in the measuring probe for contacting the medium in the columnar cavity with the measuring probe; an electronic unit, which is used for generating an acoustic frequency and emitting electromagnetic short waves to the medium in the columnar carrier fluid; the measuring probe, the resonant body and the electronic unit are connected by wires.

2. The oil-water detector based on the principle of liquid mass resonance according to claim 1, characterized in that, The electronic unit comprises: a frequency transmitting and receiving unit, which generates an acoustic frequency sweep signal for changing the self-oscillation frequency when the medium concentration changes, and also emits electromagnetic short waves for changing the energy absorbed by the electronic unit when the medium concentration changes; a signal collecting unit, which collects the frequency emitted by the frequency transmitting and receiving unit and converts it into an electric signal; a data fitting unit, which performs fitting calculation and analysis on the data collected by the signal collecting unit to calculate the change of the medium concentration; a signal output unit, which outputs the data calculated by the data fitting unit.

3. The oil-water detector based on the principle of liquid mass resonance according to claim 2, characterized in that, The self-oscillation frequency and the absorption energy of the emitted electromagnetic short waves generated by the detection instrument change with the concentration of the medium, showing a nonlinear curve characteristic.

4. The oil-water detector based on the principle of liquid mass resonance according to claim 3, characterized in that: When the detection instrument detects the change of the oil-water content, the self-oscillation frequency and the emission power of the electronic unit change simultaneously, and the internal oscillation source current value also changes, thereby realizing the determination of the medium density and the dielectric constant.

5. The oil-water detector based on the principle of liquid mass resonance according to claim 4, characterized in that: The detection instrument is threadedly connected with the pipeline and is sealed by an O-ring.

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