Tiny bubble tracer particle generator

Abstract

The utility model relates to the technical field of fluid control, in particular to a micro bubble tracer particle generator, which comprises a gas-liquid mixing chamber and a controller, a plurality of Laskin nozzle pipelines are arranged at the top of the gas-liquid mixing chamber, the lower ends of Laskin nozzles distributed on the Laskin nozzle pipelines extend into the gas-liquid mixing chamber, and the lower ends of the Laskin nozzles extend into the gas-liquid mixing chamber. The bottom of the gas-liquid mixing chamber is provided with a vortex generator, the vortex generator is electrically connected with the controller, the bottom of the gas-liquid mixing chamber is also provided with a particle discharge port, and the particle discharge port is communicated to a to-be-tested pipeline. The micro bubble tracer particle generator provided by the utility model has higher particle generation efficiency, the following property and light scattering property of the generated tracer particles are better, and the concentration and the particle size of the tracer particles can meet the change of the requirements of the tracer particles under different flow conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control technical field, specifically, relate to a kind of microbubble tracer particle generator. BACKGROUND

[0002] PIV technology is to use double-pulse laser to irradiate to the measured object (such as the airflow of wind tunnel), scatter tracer particle in the measured object, obtain two continuous particle images, use cross-correlation algorithm to obtain particle displacement, so that the tracer particle velocity is finally obtained. Since the tracer particle follows the measured object movement, the measured particle velocity can be considered as the speed of the measured object (provided that the particle can truly follow the measured object). In PIV test, the followability of tracer particle, light scattering characteristic and concentration play a decisive role in test data quality.

[0003] The followability of tracer particle and light scattering characteristic mainly depend on the density and particle size of tracer particle material. For the same tracer particle material, the smaller the particle size of tracer particle is, the better the followability is, and the higher the data reliability is. However, too small particle size will lead to poor particle brightness, which affects the signal-to-noise ratio of original image. On the contrary, the larger the particle size is, the higher the particle brightness is, and the better the image signal-to-noise ratio is. However, the followability will be poor. When designing the tracer particle generator, appropriate tracer particle preparation method must be selected according to actual application requirements to ensure a good balance in followability and light scattering property.

[0004] At present, in PIV test research of fluid machinery such as hydraulic machinery and natural gas pipeline, liquid particles are often used as tracer particles. There are various preparation methods for liquid tracer particles, including Laskin nozzle atomization method, ultrasonic atomization method, etc. Different preparation methods use different tracer particle materials, and the generated particle sizes are also different. Generally, Laskin nozzle is used to atomize oil liquid. The airflow is injected into the oil liquid at high speed from a small hole with a diameter of 1 mm. The shearing effect can produce a large amount of liquid particles with a diameter of about 1 μm. The particles are mixed in the bubbles and float to the surface of the liquid. The airflow is driven into the flow field, and the airflow followability and light scattering property are relatively balanced. However, there are still deficiencies in dynamic adjustment, which cannot meet the changes of tracer particle demand of the pipeline to be tested under different flow conditions. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of microbubble tracer particle generator to solve the problem that the existing Laskin nozzle atomization method cannot meet the changes of tracer particle demand of the pipeline to be tested under different flow conditions.

[0006] The utility model discloses a trace particle generator of microbubble is provided with the Laskin nozzle pipeline, the Laskin nozzle pipeline is provided with the Laskin nozzle, and the Laskin nozzle is arranged in the gas-liquid mixing chamber, and the Laskin nozzle is used for generating the microbubble.

[0007] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0008] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0009] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0010] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0011] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0012] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0013] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0014] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0015] According to a preferred embodiment, the Laskin nozzle pipeline is provided with a pressure valve, and the pressure valve is electrically connected with the controller.

[0016] According to a preferred embodiment, the bubble release device is an array of angle-adjustable bubble filling tubes.

[0017] The micro-bubble tracer particle generator has the advantages that: the micro-bubble tracer particle generator has higher particle generation efficiency, the following property and light scattering property of the generated tracer particles are good, and the concentration and particle size of the tracer particles can meet the change of the demand for the tracer particles under different flow conditions. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structure diagram of the micro-bubble tracer particle generator provided by the embodiment 1 of the utility model is provided.

[0019] The figure mark: 1-pressure valve, 2-Laskin nozzle pipeline, 3-gas-liquid mixing chamber, 4-temperature regulator, 5-vortex generator, 6-bubble screening plate, 7-circulating pump, 8-shunt valve, 9-valve, 10-bubble release device, 11-pipeline to be measured. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Embodiment 1

[0022] Figure 1 A structure diagram of the micro-bubble tracer particle generator provided by the embodiment of the utility model is provided. Referring to Figure 1 As shown in the figure, the micro-bubble tracer particle generator comprises a gas-liquid mixing chamber 3 and a controller; the gas-liquid mixing chamber 3 is made of transparent material such as organic glass to form a transparent window, so as to facilitate the observation of the generation condition of the internal tracer particles; the controller can be selected as a local single-chip microcomputer or a remote control terminal, which is not limited here.

[0023] In the embodiment, the top of the gas-liquid mixing chamber 3 is provided with a plurality of Laskin nozzle pipelines 2, the gas inlet of the Laskin nozzle pipeline 2 is connected with a high-pressure gas source; the Laskin nozzle pipeline 2 is provided with a pressure valve 1, the pressure valve 1 is electrically connected with a controller; the opening degree of the pressure valve 1 is controlled by the controller, so that the control of the gas inlet pressure of the Laskin nozzle pipeline 2 is realized; in addition, the liquid supply pipe aperture of the Laskin nozzle pipeline 2 is adjustable, the adjusting mode can adopt a hoop-shaped adjuster or a control valve, and the controller is used for control; the gas inlet pressure of the Laskin nozzle pipeline 2 and the oil liquid flow are controlled, so that the accurate control of the tracer particle size can be realized.

[0024] Further, the lower ends of the Laskin nozzles distributed on the Laskin nozzle pipeline 2 extend into the gas-liquid mixing chamber 3, and the bottom of the gas-liquid mixing chamber 3 is provided with a particle discharge port.

[0025] It should be noted that the Laskin nozzle pipeline 2 uses the Laskin nozzle to atomize the oil liquid supplied to the Laskin nozzle by the liquid supply pipe, and the gas flow is injected into the oil liquid at high speed from the small hole, and the shearing action can generate a large amount of liquid particles, and the particle size of the liquid particles can be adjusted by controlling the gas inlet pressure and the flow of the oil liquid, so as to meet the change of the demand for tracer particles under different flow conditions of the to-be-tested pipeline 11.

[0026] Further, the bottom of the gas-liquid mixing chamber 3 is provided with a vortex generator 5, and the vortex generator 5 is located at the center position of the bottom of the gas-liquid mixing chamber 3; the vortex generator 5 is used to further improve the uniformity of the tracer particle distribution by disturbing the gas-liquid mixture to form a vortex; the vortex generator 5 is electrically connected with a controller, and the opening / closing control and the vortex size control of the vortex generator 5 are realized by the controller, so that the accurate control of the particle distribution uniformity is realized.

[0027] In summary, the micro-bubble tracer particle generator provided by the utility model has higher particle generation efficiency, the following property and light scattering property of the generated tracer particles are good, and the concentration and particle size of the tracer particles can meet the change of the demand for tracer particles under different flow conditions.

[0028] Embodiment 2

[0029] The embodiment further illustrates the structure of the gas-liquid mixing chamber 3 based on the technical scheme provided in the embodiment 1.

[0030] In the embodiment, the gas-liquid mixing chamber 3 is also provided with a temperature regulator 4, which is electrically connected with the controller; the temperature of the gas-liquid mixture is adjusted by the temperature regulator 4, so that the stability and buoyancy characteristics of the tracer particles can be further optimized, thereby improving the tracing effect of the tracer particles.

[0031] Embodiment 3

[0032] In the embodiment, the structure of the gas-liquid mixing chamber 3 is further described based on the technical solution provided in Embodiment 1.

[0033] In addition, the gas-liquid mixing chamber 3 is also provided with a bubble screening plate 6, which is located above the vortex generator 5; a plurality of bubble through holes are formed in the bubble screening plate 6, which are used to screen different sizes of tracer particles; in a preferred embodiment, a plurality of bubble screening plates 6 are provided, and the plurality of bubble screening plates 6 have bubble through holes with different diameters and are arranged at different height positions in the gas-liquid mixing chamber 3; through the plurality of bubble screening plates 6, the tracer particles in the gas-liquid mixture can be filtered layer by layer, and each layer of bubble screening plate 6 can filter out tracer particles within a certain particle size range, so that the gas-liquid mixture can achieve high purity after passing through the plurality of bubble screening plates 6. By adjusting the combination mode of the plurality of bubble screening plates 6, the generation efficiency of the tracer particles can be improved, and the treatment effect of the gas-liquid mixture can be accurately controlled to meet the demand for different particle sizes of the tracer particles.

[0034] Embodiment 4

[0035] In the embodiment, the structure of the gas-liquid mixing chamber 3 is further described based on the technical solution provided in Embodiment 1.

[0036] The gas-liquid mixing chamber 3 is provided with a circulating pipeline outside, the circulating pipeline is provided with a circulating pump 7 and a flow divider valve 8; the flow divider valve 8 is arranged at the outlet side of the circulating pump 7, and the outlet of the circulating pipeline is divided into a first liquid outlet and a second liquid outlet; a circulating liquid inlet is formed at the top of the gas-liquid mixing chamber 3, the liquid inlet of the circulating pipeline is in communication with the particle discharge port, the first liquid outlet of the circulating pipeline is in communication with the circulating liquid inlet of the gas-liquid mixing chamber 3, and the second liquid outlet of the circulating pipeline is connected to the to-be-measured pipeline 11 through a liquid outlet pipeline. In the embodiment, the gas-liquid mixture is circulated in the gas-liquid mixing chamber 3 by the circulating water pump, and after the bubbles in the gas-liquid mixing chamber 3 are uniformly distributed and the particle size meets the demand, the flow divider valve 8 is switched to send the tracer particles to the to-be-measured pipeline 11; whether the bubbles are uniformly distributed can be obtained by sensing, which will not be described in detail here.

[0037] Embodiment 5

[0038] The embodiment is based on the technical solution provided in Embodiment 4, and further illustrates the release structure of the tracer particles.

[0039] In the embodiment, the liquid outlet pipeline is provided with a valve 9, and the liquid outlet of the liquid outlet pipeline is provided with a bubble release device 10; the valve 9 and the bubble release device 10 are electrically connected with the controller; in the embodiment, the bubble release device 10 is an angle-adjustable bubble filling pipe array, and the bubble filling pipe is in an L shape, so as to reduce the influence of the tracer particles on the fluid in the to-be-tested pipeline 11 under each flow rate; the bubble filling pipe array in the L shape can realize the multi-point and directional release of the tracer particles, so as to control the release position and release speed of the tracer particles, so as to accurately track the flow path of the fluid in the to-be-tested pipeline 11, and avoid the uneven distribution of the tracer particles in the fluid.

[0040] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A micro-bubble tracer particle generator, characterised in that, The utility model relates to a kind of gas-liquid mixing chambers (3) and controller, the top of the gas-liquid mixing chamber (3) is equipped with several Laskin nozzle pipelines (2), the Laskin nozzle pipeline (2) is equipped with pressure valve (1), the pressure valve (1) is electrically connected with controller, Laskin nozzle is distributed on the Laskin nozzle pipeline (2) and the lower end of the Laskin nozzle is inhaled into gas-liquid mixing chamber (3), the bottom of the gas-liquid mixing chamber (3) is equipped with vortex generator (5), the vortex generator (5) is electrically connected with controller, the bottom of the gas-liquid mixing chamber (3) is also equipped with particle discharge outlet, and the particle discharge outlet is communicated to be measured pipeline (11).

2. The microbubble contrast agent generator of claim 1 wherein, The Laskin nozzle pipeline (2) is connected with a high-pressure gas source.

3. The microbubble contrast agent generator of claim 1 wherein, The liquid supply tube aperture of the Laskin nozzle pipeline (2) is adjustable.

4. The micro-bubble tracer particle generator of claim 1, wherein, The gas-liquid mixing chamber (3) is also equipped with a temperature regulator (4), and the temperature regulator (4) is electrically connected with the controller.

5. The microbubble contrast agent generator of claim 1 wherein, The gas-liquid mixing chamber (3) is also equipped with a bubble screening plate (6), and the bubble screening plate (6) is provided with a plurality of bubble vias.

6. The micro-bubble tracer particle generator of claim 5, wherein, The bubble screening plate (6) is provided with a plurality of bubble screening plates (6) having different bubble via diameters and distributed at different height positions of the gas-liquid mixing chamber (3).

7. The microbubble contrast agent generator of claim 1 wherein, The gas-liquid mixing chamber (3) is provided with a transparent window.

8. The microbubble contrast agent generator of any one of claims 1 to 7, wherein, The gas-liquid mixing chamber (3) is provided with a circulating pipeline, and the circulating pipeline is provided with a circulating pump (7) and a shunt valve (8). The shunt valve (8) is arranged on the outlet side of the circulating pump (7) to divide the outlet of the circulating pipeline into a first liquid outlet and a second liquid outlet. The top of the gas-liquid mixing chamber (3) is provided with a circulating liquid inlet, and the liquid inlet of the circulating pipeline is communicated with the particle discharge outlet. The first liquid outlet of the circulating pipeline is communicated with the circulating liquid inlet of the gas-liquid mixing chamber (3), and the second liquid outlet of the circulating pipeline is communicated to the measured pipeline (11) through a liquid outlet pipeline.

9. The microbubble contrast agent generator of claim 8 wherein, The liquid outlet pipeline is provided with a valve (9), and the liquid outlet of the liquid outlet pipeline is provided with a bubble releasing device (10). The valve (9) and the bubble releasing device (10) are electrically connected with the controller.

10. The microbubble contrast agent generator of claim 9 wherein, The bubble releasing device (10) is an angle-adjustable bubble filling tube array.

Images