CN205958229U - Experimental device for be used for studying micro scale effect - Google Patents

Abstract

The utility model relates to an experimental device for studying microscale effects, comprising an injection system, a gas filter device, a liquid storage tank, a liquid filter device, an ultrasonic bubble detector, a conduit, a switch one, a pressure sensor one, a microtube one, Pressure sensor two, flow metering tube one, electron microscope, computer and temperature control box. It is characterized in that: the injection system is sequentially connected with the gas filter device, the liquid storage tank, and the liquid filter device; an ultrasonic bubble detector is installed on the conduit connected to the liquid filter device, and a switch 1, a pressure sensor 1, and a micro Tube 1, pressure sensor 2, and flow metering tube 1; the other side is also connected to the corresponding device in sequence; the above-mentioned ultrasonic bubble detector and the devices connected to both sides are placed in the temperature control box; the pressure used The sensors are all connected with the computer outside the temperature control box, and the computer is connected with an electron microscope at the same time to observe the flow metering tube used.

Description

An experimental setup for studying microscale effects

technical field

The utility model belongs to the field of fluid mechanics, in particular to an experimental device for studying microscale effects.

Background technique

With the deepening of MEMS research, the flow of microfluids has been paid more attention by researchers. With the miniaturization of the size, some flow laws of the fluid are different from the macro flow, that is, there are micro-scale effects. Taking oil and gas field development projects as an example, there are a large number of nanopores in the organic matter of shale, and the flow of gas in the nanopores has micro-scale effects. At present, the design of the experimental device used to study the micro-scale effect is not rigorous. During the experiment, the effect of the inlet and outlet of the device and the influence of air bubbles are often ignored, which leads to experimental errors and affects the understanding of the micro-scale effect. . Therefore, it is urgent to design a more rigorous experimental device to study micro-scale effects.

Utility model content

The utility model provides an experimental device for studying micro-scale effects. The device can effectively avoid the influence of air bubbles and import and export effects in the experimental process, and conduct analysis and research of micro-scale effects more rigorously. At the same time, It is possible to conduct analysis and research on microscale effects at different temperatures.

In order to achieve the above object, the utility model adopts the following technical solutions: the device includes an injection system, a gas filter device, a liquid storage tank, a liquid filter device, an ultrasonic bubble detector, a catheter, a switch one, a pressure sensor one, a microtube one, a pressure sensor 2. Flow metering tube 1, switch 2, pressure sensor 3, microtube 2, pressure sensor 4, flow metering tube 2, power cord 1, power cord 2, power cord 3, power cord 4, power cord 5, computer, electronics Microscope and temperature control box. It is characterized in that: in the device, the injection system is sequentially connected with the gas filter device, liquid storage tank and liquid filter device through conduits, wherein the injection system is used to inject gas and provide power support for the experiment; An ultrasonic bubble detector is installed on the conduit of the pipe, and then a switch 1, a pressure sensor 1, a microtube 1, a pressure sensor 2 and a flow metering tube 1 are connected in sequence on one side; a switch 2 and a pressure sensor 3 are also connected in sequence on the other side , microtube two, pressure sensor four and flow metering tube two; the above-mentioned ultrasonic bubble detector and a series of devices connected on both sides are placed in the temperature control box; pressure sensor one, pressure sensor two, pressure sensor three, pressure The sensor four is connected to the computer through the power line one, the power line two, the power line three, and the power line four respectively; the computer is connected with an electron microscope through the power line five at the same time to observe the flow metering tube one and the flow metering tube two.

The utility model has the following beneficial effects: (1) the experimental device can use the subtraction method of long and short tubes under isothermal conditions to eliminate the influence of the import and export effect in the experiment; (2) the device can use an ultrasonic bubble detector to detect the existence of bubbles, and then eliminate The impact of air bubbles on the experimental results; (3) Using the temperature control box, the device can study the micro-scale effects at different temperatures; (4) The device can test the micro-scale effects of single microtubes, and can also test the micro-scale effects of double microtubes. Microscale effects test.

Description of drawings

Fig. 1 is a side view of the overall appearance of the utility model.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to achieve the above purpose, the utility model adopts the following technical solutions: including injection system 1, gas filter device 2, liquid storage tank 3, liquid filter device 4, ultrasonic bubble detector 5, catheter 6, switch one 7, pressure sensor one 8 , microtube one 9, pressure sensor two 10, flow metering tube one 11, switch two 12, pressure sensor three 13, microtube two 14, pressure sensor four 15, flow metering tube two 16, power line one 17, power line two 18. Power cord three 19, power cord four 20, power cord five 21, computer 22, electron microscope 23 and temperature control box 24. It is characterized in that: in the device, the injection system 1 is sequentially connected with the gas filter device 2, the liquid storage tank 3, and the liquid filter device 4, wherein the injection system 1 is used for injecting gas and providing power support for the experiment; in the liquid filter device 4. The connected conduit 6 is equipped with an ultrasonic bubble detector 5, and then a switch 7, a pressure sensor 8, a micropipe 9, a pressure sensor 10 and a flow metering tube 11 are sequentially connected on one side; The side is also connected with switch two 12, pressure sensor three 13, micropipe two 14, pressure sensor four 15 and flow metering tube two 16 in sequence; In control box 24; Pressure sensor one 8, pressure sensor two 10, pressure sensor three 13, pressure sensor four 15 link to each other with computer 22 by power line one 17, power line two 18, power line three 19, power line four 20 respectively; The computer 22 is connected with the electron microscope 23 through the power line 5 21 at the same time, in order to observe the flow metering tube 1 11 and the flow metering tube 2 16 .

The injection system 1 in this device is used to inject gas and provide power support. The specific gas type and the pressure provided are given according to the research situation; the gas filter device 2 is mainly used to filter impurities and moisture in the gas and dry the gas, liquid filter Device 4 is used to filter tiny impurities and air bubbles in the experimental fluid.

The length of micropipe one 9 in this device is twice of the length of micropipe two 14, and other parameters are all the same; Because the flow rate of microscale experiment is less, so select flow metering pipe one 11 and flow metering pipe two 16 to cooperate Electron microscope 23 carries out the measurement of flow rate, and electron microscope 23 records the liquid level movement in flow metering tube one 11 and flow metering tube two 16; Utilize computer 22 to be able to finish to pressure sensor one 8, pressure sensor two 10, pressure sensor three 13 and The pressure data of the pressure sensor 415 can be sorted out, and the moving image of the liquid surface recorded by the electron microscope 23 can be obtained at the same time.

The temperature control box 24 in this device can control the temperature of the internal environment of the temperature control box 24, and guarantee that the experimental temperature of micropipe one 9 and micropipe two 14 is the same, due to the particularity of the microscale experiment, the precision of the temperature control box 24 is required as high as possible.

The method to realize the function of the device is: before the experiment starts, keep the switch one 7 and the switch two 12 closed, inject a certain gas with a certain pressure through the injection system 1, filter impurities through the gas filter device 2 and the liquid filter device 4, Utilize the ultrasonic bubble detector 5 to detect the filtered fluid, if there are still bubbles, then perform the experiment again, if there are no bubbles, then turn on the switch one 7 and the switch two 12, and measure the volume of the microtube one 9 by the pressure sensor one 8 and the pressure sensor two 10 The inlet and outlet pressures are measured by the pressure sensor 3 13 and the pressure sensor 4 15 to measure the inlet and outlet pressure of the microtube 2 14. Since the microtube 9 and the microtube 2 14 have the same experimental conditions, the additional pressure difference generated by the effect of the inlet and outlet is the same, that is, the microtube 2 The difference between the pressure drop at both ends of tube 19 and the pressure drop at both ends of microtube 2 14 is the equivalent pressure drop of microtube 2 14 obtained after the import and export effects are excluded. The moving image of the liquid surface of 16 is sent to the computer 22 from time to time, and the time required to move a certain distance can be recorded to obtain the flow rate of the microtube 14, combined with the N-S equation, the micro-scale effect can be obtained Verification and analysis. In addition, according to research needs, if the influence of import and export effects can be ignored, you can choose to turn on switch one 7 or switch two 12 to conduct direct measurement research on a single microtube; if you need to study microscale effects at different temperatures, you can use temperature The control box 24 is used to change and control the temperature, and then perform the experimental operation.

The device of the utility model can eliminate the influence of air bubbles and import and export effects in micro-scale experiments, conduct micro-scale experimental research more rigorously, and finally can assist research on microfluid flow laws, which has great benefits.

Claims (1)

1. An experimental device for studying microscale effects, comprising an injection system (1), a gas filter (2), a liquid storage tank (3), a liquid filter (4), an ultrasonic bubble detector (5), Conduit (6), switch one (7), pressure sensor one (8), microtube one (9), pressure sensor two (10), flow metering tube one (11), switch two (12), pressure sensor three ( 13), microtube two (14), pressure sensor four (15), flow metering tube two (16), power cord one (17), power cord two (18), power cord three (19), power cord four ( 20), power cord five (21), computer (22), electron microscope (23) and temperature control box (24), it is characterized in that: injection system (1) and gas filtering device (2), liquid storage tank (3 ), the liquid filtering device (4) is connected in sequence, wherein, the injection system (1) is used to inject gas and provide power support for the experiment; the catheter (6) connected to the liquid filtering device (4) is equipped with ultrasonic bubble detection device (5), followed by switch one (7), pressure sensor one (8), micropipe one (9), pressure sensor two (10) and flow metering tube one (11) on one side; The side is also connected with switch two (12), pressure sensor three (13), micropipe two (14), pressure sensor four (15) and flow metering tube two (16) in sequence; the above-mentioned ultrasonic bubble detector (5) and A series of devices connected on both sides are all placed in the temperature control box (24); pressure sensor one (8), pressure sensor two (10), pressure sensor three (13), pressure sensor four (15) respectively through the power line One (17), power cord two (18), power cord three (19), power cord four (20) link to each other with computer (22); Computer (22) is connected with electron microscope (23) by power cord five (21) simultaneously ), used to observe flow metering tube one (11) and flow metering tube two (16).