Spray needle type solid-liquid mixture tracer particle generator and method

Abstract

The invention relates to the technical field of tracer particle generation, in particular to a spray needle type solid-liquid mixture tracer particle generator and a method, and the spray needle type solid-liquid mixture tracer particle generator comprises a mixing cavity, a particle spraying pipeline, an optical measuring device and a controller; an inner cavity, a liquid input channel, a solid input channel and an output channel are formed in the mixing cavity, each channel is provided with a valve, a plurality of vortex generators and a driver used for driving the vortex generators to adjust angles are arranged in the inner cavity, and the vortex generators are constructed to form a vortex area in the inner cavity. An ultrasonic generator is arranged on the outer side of the mixing cavity corresponding to the vortex region; the optical measuring device is arranged on the side face of the to-be-measured pipeline, and the optical measuring device, the valve, the driver and the ultrasonic generator are all electrically connected with the controller. Through the combined action of the vortex generator and the ultrasonic generator, the mixing uniformity of a solid-liquid mixture is improved, and through real-time monitoring and feedback adjustment after tracer particles enter a flow field, the stability and controllability of generation of the tracer particles are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tracer particle generation, and in particular to a needle-type solid-liquid mixture tracer particle generator and method. Background Art

[0002] In many fields such as fluid dynamics research, multiphase flow analysis, chemical reaction process monitoring, and industrial process control, it is crucial to understand the internal microstructure and dynamic behavior of the fluid. To achieve this goal, tracer particle technology is often used to mark and track key parameters such as the fluid's motion trajectory, velocity distribution, and mixing state. Traditional tracer particles include simple gas, liquid, or solid particles, each of which has certain advantages in specific application scenarios, but also has certain limitations.

[0003] Among them, gas tracer particles, such as smoke or bubbles, have good fluidity and followability, but they are easy to dissipate or be compressed in high-density or high-viscosity fluids, and it is difficult to maintain a stable shape and distribution. Liquid tracer particles, such as dye droplets, are easy to observe, but they may dissolve or diffuse in some fluids, affecting the measurement accuracy. Solid tracer particles, such as glass beads or metal particles, have good stability, but they are easily affected by fluid resistance during the flow process, resulting in uneven particle distribution or a lag in movement speed behind the main body of the fluid.

[0004] In order to overcome the limitations of the above-mentioned single tracer particles, solid-liquid mixtures have gradually attracted attention as tracer particles; solid-liquid mixtures combine the advantages of liquids and solids, with both the fluidity and good followability of liquids and the stability and traceability of solid particles. However, traditional methods for generating solid-liquid mixture tracer particles often find it difficult to simultaneously ensure the uniformity, stability, and controllability of particles, resulting in errors or uncertainties in the measurement results.

[0005] Based on this, how to simultaneously achieve the uniformity, stability and controllability of tracer particle generation in solid-liquid mixtures is a technical problem that urgently needs to be solved. Summary of the invention

[0006] The object of the present invention is to provide a needle-type solid-liquid mixture tracer particle generator and method, which improves the uniformity of mixing of solid-liquid mixture tracer particles through the combined action of a vortex generator and an ultrasonic generator, and improves the stability and controllability of tracer particle generation through real-time monitoring and feedback adjustment after the tracer particles enter the flow field, so as to solve the technical problem of how to simultaneously achieve the uniformity, stability and controllability of solid-liquid mixture tracer particle generation.

[0007] The present invention is implemented by the following technical solutions: a needle-type solid-liquid mixture tracer particle generator, comprising a mixing cavity, a particle injection pipeline, an optical measurement device and a controller;

[0008] The mixing cavity is formed with an inner cavity for mixing liquid and solid, a liquid input channel for liquid input, a solid input channel for solid input and an output channel for outputting a solid-liquid mixture, a first valve is provided on the liquid input channel, a second valve is provided on the solid input channel, a third valve is provided on the output channel, a plurality of vortex generators and a driver for driving the vortex generators to adjust their angles are arranged in the inner cavity, the plurality of vortex generators are configured to form a vortex zone in the inner cavity, the liquid input channel is arranged at the top of the vortex zone, the solid input channel is arranged at the side of the vortex zone, the output channel is arranged at the bottom of the vortex zone, and an ultrasonic generator is arranged on the outer side of the mixing cavity corresponding to the vortex zone;

[0009] The particle injection pipeline is formed with a first input end for communicating with the output channel, a second input end for communicating with the gas input channel, and a first output end for communicating with the spray needle, and a fourth valve is provided on the second input end;

[0010] The optical measuring device is arranged on the side of the pipeline to be measured, and is used to obtain the tracer particle state of the flow field in the pipeline to be measured. The signal output end of the optical measuring device is electrically connected to the signal input end of the controller, and the signal input ends of the first valve, the second valve, the third valve, the fourth valve, the driver and the ultrasonic generator are all electrically connected to the signal output end of the controller.

[0011] According to a preferred embodiment, a transparent window is formed on the outer wall of the mixing chamber.

[0012] According to a preferred embodiment, it further comprises a solid supply tank, the discharge end of the solid supply tank is connected to the solid input channel, and a vibrating feeder for feeding materials into the solid input channel is arranged in the solid supply tank.

[0013] According to a preferred embodiment, the particle injection pipeline is further formed with a second output end for connecting to a pressure relief pipeline, a safety valve is arranged in the pressure relief pipeline, and the safety valve is configured to passively open when the air pressure in the particle injection pipeline is greater than a first preset pressure threshold.

[0014] According to a preferred embodiment, it also includes a pressure sensor and a feedback regulator, the pressure sensor is electrically connected to the feedback regulator, the feedback regulator is electrically connected to the safety valve, the pressure sensor is arranged in the particle injection pipeline, and the feedback regulator is configured to control the safety valve to actively open when the air pressure in the particle injection pipeline is greater than a second preset pressure threshold, and the second preset pressure threshold is less than the first preset pressure threshold.

[0015] According to a preferred embodiment, it also includes a first temperature regulating device and a second temperature regulating device, both of which are electrically connected to the controller, the first temperature regulating device is arranged in the inner cavity, and the second temperature regulating device is arranged in the particle injection pipeline.

[0016] According to a preferred embodiment, it also includes a particle recovery device, which is arranged at the output end of the pipeline to be tested and consists of a filter cartridge, a centrifuge and a collection tank, wherein the filter cartridge is arranged in the pipeline to be tested, the discharge end of the filter cartridge is connected to the feed end of the centrifuge, and the discharge end of the centrifuge is connected to the feed end of the collection tank.

[0017] According to a preferred embodiment, the spray needle is composed of a spray needle body, a microchannel and a spray port, a plurality of the microchannels are evenly arranged in the spray needle body, the spray port is arranged at the output end of the microchannel, and a plurality of water outlet holes are arranged on the spray port.

[0018] The present invention also provides a method for generating tracer particles of a solid-liquid mixture using a needle-type solid-liquid mixture, which uses the tracer particle generator as described above, and comprises:

[0019] Step 1: Open the first valve and the second valve, add liquid into the inner cavity through the liquid input channel, and add solid into the inner cavity through the solid input channel;

[0020] Step 2: Turn on the ultrasonic generator to mix the solid and liquid in the eddy current area;

[0021] Step 3: Open the third valve and the fourth valve, send the solid-liquid mixture tracer particles from the spray needle into the pipeline to be tested, and start the test;

[0022] Step 4: obtaining the state of the tracer particles in the flow field in the pipeline to be tested, and controlling one or more actions of the first valve, the second valve, the third valve, the fourth valve, the driver and the ultrasonic generator according to the state of the tracer particles to adjust the particle size distribution and / or injection speed of the tracer particles;

[0023] Step 5: After the test, clean the tracer particle generator.

[0024] The technical solution of a needle-type solid-liquid mixture tracer particle generator and method provided by the present invention has at least the following advantages and beneficial effects: (1) Through the combined action of a vortex generator and an ultrasonic generator, the vortex generator can promote particle dispersion while the ultrasonic generator can generate high-frequency vibration to enhance the mixing effect, thereby further improving the uniformity of the solid-liquid mixture tracer particles; (2) The present invention improves the stability and controllability of tracer particle generation through real-time monitoring and feedback adjustment after the tracer particles enter the flow field; (3) The present invention ensures that the solid-liquid mixture can be uniformly and efficiently sprayed into tiny tracer particles with uniform particle size by precisely controlling the intake pressure and the flow rate of the solid-liquid mixture, combined with the microchannel in the needle, and the tiny tracer particles not only have uniform particle size, but also have uniform particle size. It retains the fluidity and followability of the liquid, and also has the stability and visibility of solid particles, greatly enhancing the tracking effect in a complex fluid environment, making the measurement of the fluid motion trajectory, velocity distribution and mixing state more accurate and reliable; (4) The present invention can accurately control the flow path of the solid-liquid mixture through the microchannel inside the needle body, and further optimize the particle size distribution of the solid-liquid mixture through the porous design of the injection port, thereby improving the uniformity of the tracer particles; (5) The present invention can ensure the stability of the injection process by real-time monitoring and adjusting the pressure in the particle injection pipeline; (6) The present invention can further optimize the generation effect of the tracer particles by adjusting the temperature in the inner cavity and in the particle injection pipeline to control the physical properties of the solid-liquid mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a needle-type solid-liquid mixture tracer particle generator provided in Example 1 of the present invention;

[0026] Figure 2 A schematic diagram of the layout of an optical measurement device provided in Example 1 of the present invention;

[0027] Figure 3 A schematic diagram of the structure of a particle recovery device provided in Example 3 of the present invention;

[0028] Figure 4 A schematic diagram of a flow chart of a method for generating tracer particles provided in Example 1 of the present invention;

[0029] Figure numerals: 1-liquid supply tank, 2-first valve, 3-mixing chamber, 4-transparent window, 5-vortex generator, 6-ultrasonic generator, 7-third valve, 8-particle injection pipeline, 9-spray needle, 10-solid supply tank, 11-vibrating feeder, 12-second valve, 13-fourth valve, 14-gas input channel, 15-safety valve, 16-pressure relief pipeline, 17-centrifuge, 18-collecting tank, 19-filter cartridge, 20-pipeline to be tested, 21-optical measuring device, 22-controller. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Example 1

[0032] Figure 1 This is a schematic diagram of the structure of the needle-type solid-liquid mixture tracer particle generator provided by an embodiment of the present invention. Figure 1 As shown, the solid-liquid mixture tracer particle generator includes a mixing chamber 3, a particle injection pipeline 8, an optical measuring device 21 and a controller 22.

[0033] Specifically in this embodiment, the mixing cavity 3 is formed with a transparent window 4, an inner cavity, a liquid input channel, a solid input channel and an output channel; wherein, the configuration of each channel is as follows: the liquid input channel is connected to the liquid supply tank 1, for inputting the liquid to be mixed into the inner cavity, and the liquid input channel is provided with a first valve 2 for controlling the flow rate of the liquid; the solid input channel is connected to the solid supply tank 10, for inputting the solid to be mixed into the inner cavity, and the solid input channel is provided with a second valve 12 for controlling the amount of solid, and the solid supply tank 10 is provided with a vibrating feeder 11 for feeding the solid input channel; the output channel is connected to the particle injection pipeline 8, for inputting the mixed solid-liquid mixture into the particle injection pipeline 8, and the output channel is provided with a third valve 7 for controlling the flow rate of the solid-liquid mixture.

[0034] Regarding the inner cavity, the inner cavity is used to mix the input liquid and solid; specifically in this embodiment, a plurality of vortex generators 5 and a driver for driving the vortex generators 5 for angle adjustment are arranged in the inner cavity, and the plurality of vortex generators 5 are constructed to form a vortex zone in the inner cavity, the liquid input channel is arranged at the top of the vortex zone, the solid input channel is arranged at the side of the vortex zone, and the output channel is arranged at the bottom of the vortex zone; it should be noted that the vortex zone can break the laminar state in the liquid through rotation and shear force, so that different combinations of liquid and solid particles can be evenly mixed in a very short time, and the mixing is not only fast but also can achieve highly uniform mixing, thereby improving the uniformity of the tracer particles.

[0035] Furthermore, an ultrasonic generator 6 is provided on the outer side of the mixing cavity 3 corresponding to the eddy zone. The ultrasonic generator 6 causes high-frequency vibration, strong impact force, vortex motion and boost effect in the solid-liquid mixture in the eddy zone. These effects act together on the solid-liquid mixture, so that the particles therein are repeatedly acted on and quickly dispersed; the high-frequency vibration of the ultrasonic wave can destroy the agglomeration force between the particles, disperse them into smaller units, thereby improving the dispersion effect.

[0036] It should be noted that, in the present invention, the vortex generator 5 and the ultrasonic generator 6 work together to promote particle dispersion while the ultrasonic generator 6 generates high-frequency vibration to enhance the mixing effect, thereby further improving the uniformity of the tracer particles in the solid-liquid mixture.

[0037] Furthermore, the particle injection pipeline 8 is formed with a first input end for connecting to the output channel, a second input end for connecting to the gas input channel 14, and a first output end for connecting to the spray needle 9, and a fourth valve 13 is provided on the second input end; wherein, the gas input channel 14 is connected to a high-pressure air pump, which is used to provide high-pressure gas to the particle injection pipeline 8, and spray the solid-liquid mixture in the particle injection pipeline 8 out of the spray needle 9.

[0038] Further, the optical measuring device 21 is arranged on the side of the pipeline 20 to be tested, and is used to obtain the tracer particle state of the flow field in the pipeline 20 to be tested, such as the particle size distribution, injection speed and other parameters of the tracer particles in the flow field; the signal output end of the optical measuring device 21 is electrically connected to the signal input end of the controller 22, and is used to send the obtained tracer particle state information in the flow field to the controller 22, and perform feedback control based on the information; specifically, the signal input ends of the first valve 2, the second valve 12, the third valve 7, the fourth valve 13, the driver and the ultrasonic generator 6 are all electrically connected to the signal output end of the controller 22, and the controller 22 realizes feedback adjustment by controlling one or more of the first valve 2, the second valve 12, the third valve 7, the fourth valve 13, the driver and the ultrasonic generator 6, and optimizes the parameters such as particle size distribution and injection speed. It should be noted that the present invention improves the stability and controllability of tracer particle generation through real-time monitoring and feedback adjustment after the tracer particles enter the flow field.

[0039] This embodiment also provides a method for generating tracer particles of a solid-liquid mixture using a needle 9 type solid-liquid mixture, using the tracer particle generator described above, see Figure 4 As shown, the following steps are included:

[0040] Step 1: Open the first valve 2 and the second valve 12, add liquid into the inner cavity through the liquid input channel, and add solid into the inner cavity through the solid input channel;

[0041] Step 2: Turn on the ultrasonic generator 6 to mix the solid and liquid in the eddy current area;

[0042] Step 3: Open the third valve 7 and the fourth valve 13, and send the solid-liquid mixture tracer particles from the spray needle 9 into the pipeline to be tested 20 to start the test;

[0043] Step 4: obtaining the state of the tracer particles in the flow field of the pipeline 20 to be tested, and controlling one or more actions of the first valve 2, the second valve 12, the third valve 7, the fourth valve 13, the driver and the ultrasonic generator 6 according to the state of the tracer particles, adjusting the particle size distribution and / or injection speed of the tracer particles, and optimizing the parameters such as the particle size distribution and injection speed;

[0044] Step 5: After the test, clean the tracer particle generator, including cleaning the inner cavity, spray needle 9 and other components to remove residual mixture and impurities.

[0045] Example 2

[0046] This embodiment is based on the technical solution provided in Example 1, and further describes the particle injection pipeline 8:

[0047] Specifically, the particle injection pipeline 8 is also formed with a second output end for connecting to a pressure relief pipeline 16, and a safety valve 15 is provided in the pressure relief pipeline 16, and the safety valve 15 is constructed to passively open when the air pressure in the particle injection pipeline 8 is greater than a first preset pressure threshold. Further, it also includes a pressure sensor and a feedback regulator, the pressure sensor is electrically connected to the feedback regulator, the feedback regulator is electrically connected to the safety valve 15, the pressure sensor is arranged in the particle injection pipeline 8, and the feedback regulator is configured to control the safety valve 15 to actively open when the air pressure in the particle injection pipeline 8 is greater than a second preset pressure threshold, and the second preset pressure threshold is less than the first preset pressure threshold. It should be noted that the present invention can ensure the stability of the injection process by real-time monitoring and adjusting the pressure in the particle injection pipeline 8.

[0048] Furthermore, the spray needle 9 is composed of a spray needle 9 body, a microchannel and a spray port, a plurality of the microchannels are evenly arranged in the spray needle 9 body, the spray port is arranged at the output end of the microchannel, and a plurality of water outlet holes are arranged on the spray port. It should be noted that the present invention can accurately control the flow path of the solid-liquid mixture through the microchannel inside the spray needle 9 body, and further optimize the particle size distribution of the solid-liquid mixture through the porous design of the spray port, and improve the uniformity of the tracer particles; in addition, by accurately controlling the intake pressure and the flow rate of the solid-liquid mixture, combined with the microchannel in the spray needle 9, it is ensured that the solid-liquid mixture can be uniformly and efficiently sprayed into tiny tracer particles with uniform particle size, which not only retains the fluidity and followability of the liquid, but also has the stability and visibility of solid particles, greatly enhancing the tracking effect in a complex fluid environment, making the measurement of fluid motion trajectory, velocity distribution and mixing state more accurate and reliable.

[0049] Furthermore, it also includes a first temperature regulating device and a second temperature regulating device, both of which are electrically connected to the controller 22, the first temperature regulating device is arranged in the inner cavity, and the second temperature regulating device is arranged in the particle injection pipeline 8. It should be noted that the present invention can further optimize the generation effect of the tracer particles by adjusting the temperature in the inner cavity and in the particle injection pipeline 8 to control the physical properties of the solid-liquid mixture.

[0050] Example 3

[0051] This embodiment further describes the recovery of particles based on the technical solution provided in Example 1:

[0052] Specifically, see Figure 3 As shown, it also includes a particle recovery device, which is arranged at the output end of the pipeline 20 to be tested, and is composed of a filter cartridge 19, a centrifuge 17 and a collection tank 18; wherein the filter cartridge 19 is arranged in the pipeline 20 to be tested, and is used to separate solid particles from the flow field; the discharge end of the filter cartridge 19 is connected to the feed end of the centrifuge 17, and is used to separate and purify the particles input from the filter cartridge 19 to the centrifuge 17; the discharge end of the centrifuge 17 is connected to the feed end of the collection tank 18, and is used to store the processed particles.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A needle-type solid-liquid mixture tracer particle generator, characterized in that: It comprises a mixing chamber (3), a particle injection pipeline (8), an optical measuring device (21) and a controller (22); The mixing cavity (3) is formed with an inner cavity for mixing liquid and solid, a liquid input channel for liquid input, a solid input channel for solid input, and an output channel for outputting a solid-liquid mixture, the liquid input channel is provided with a first valve (2), the solid input channel is provided with a second valve (12), and the output channel is provided with a third valve (7), a plurality of vortex generators (5) and a driver for driving the vortex generators (5) to adjust their angles are arranged in the inner cavity, the plurality of vortex generators (5) are configured to form a vortex zone in the inner cavity, the liquid input channel is arranged at the top of the vortex zone, the solid input channel is arranged at the side of the vortex zone, and the output channel is arranged at the bottom of the vortex zone, and an ultrasonic generator (6) is arranged on the outer side of the mixing cavity (3) corresponding to the vortex zone; The particle injection pipeline (8) is formed with a first input end for communicating with the output channel, a second input end for communicating with the gas input channel (14), and a first output end for communicating with the injection needle (9), and a fourth valve (13) is provided on the second input end; The optical measuring device (21) is arranged on the side of the pipeline (20) to be measured, and is used to obtain the tracer particle state of the flow field in the pipeline (20) to be measured. The signal output end of the optical measuring device (21) is electrically connected to the signal input end of the controller (22), and the signal input ends of the first valve (2), the second valve (12), the third valve (7), the fourth valve (13), the driver and the ultrasonic generator (6) are all electrically connected to the signal output end of the controller (22).

2. The needle-type solid-liquid mixture tracer particle generator according to claim 1, characterized in that: The outer wall of the mixing chamber (3) is formed with a transparent window (4).

3. The needle-type solid-liquid mixture tracer particle generator according to claim 1, characterized in that: It also comprises a solid supply tank (10), the discharge end of the solid supply tank (10) is connected to the solid input channel, and a vibrating feeder (11) is provided in the solid supply tank (10) for feeding materials into the solid input channel.

4. The needle-type solid-liquid mixture tracer particle generator according to claim 1, characterized in that: The particle injection pipeline (8) is also formed with a second output end for connecting to a pressure relief pipeline (16); a safety valve (15) is arranged in the pressure relief pipeline (16); and the safety valve (15) is configured to passively open when the air pressure in the particle injection pipeline (8) is greater than a first preset pressure threshold.

5. The needle-type solid-liquid mixture tracer particle generator according to claim 4, characterized in that: The invention also comprises a pressure sensor and a feedback regulator, wherein the pressure sensor is electrically connected to the feedback regulator, and the feedback regulator is electrically connected to the safety valve (15). The pressure sensor is arranged in the particle injection pipeline (8), and the feedback regulator is configured to control the safety valve (15) to actively open when the air pressure in the particle injection pipeline (8) is greater than a second preset pressure threshold, and the second preset pressure threshold is less than the first preset pressure threshold.

6. The needle-type solid-liquid mixture tracer particle generator according to claim 1, characterized in that: It also includes a first temperature regulating device and a second temperature regulating device, wherein the first temperature regulating device and the second temperature regulating device are both electrically connected to a controller (22), the first temperature regulating device is arranged in the inner cavity, and the second temperature regulating device is arranged in the particle injection pipeline (8).

7. The needle-type solid-liquid mixture tracer particle generator according to claim 1, characterized in that: The device also comprises a particle recovery device, which is arranged at the output end of the pipeline (20) to be tested and is composed of a filter cartridge (19), a centrifuge (17) and a collection tank (18), wherein the filter cartridge (19) is arranged in the pipeline (20) to be tested, the discharge end of the filter cartridge (19) is connected to the feed end of the centrifuge (17), and the discharge end of the centrifuge (17) is connected to the feed end of the collection tank (18).

8. The needle-type solid-liquid mixture tracer particle generator according to claim 1, characterized in that: The spray needle (9) is composed of a spray needle (9) body, a microchannel and a spray port, a plurality of the microchannels are evenly arranged in the spray needle (9) body, the spray port is arranged at the output end of the microchannel, and a plurality of water outlet holes are arranged on the spray port.

9. A method for generating tracer particles of a solid-liquid mixture by a needle spray, using the tracer particle generator as claimed in any one of claims 1 to 8, characterized in that: include: Step 1: Open the first valve (2) and the second valve (12), add liquid into the inner cavity through the liquid input channel, and add solid into the inner cavity through the solid input channel; Step 2: turning on the ultrasonic generator (6) to mix the solid and liquid in the eddy current area; Step 3: Open the third valve (7) and the fourth valve (13), and send the solid-liquid mixture tracer particles from the spray needle (9) into the test pipe (20), and start the test; Step 4: Obtain the tracer particle state of the flow field in the pipeline (20) to be tested, and control one or more actions of the first valve (2), the second valve (12), the third valve (7), the fourth valve (13), the driver and the ultrasonic generator (6) according to the tracer particle state to adjust the particle size distribution and / or injection speed of the tracer particles.

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