CN220170490U - Integrated device that displays multiple water flow patterns - Google Patents

Abstract

A device that integrates multiple water flow patterns and involves the field of fluid testing, including a pressure water tank and a water supply tank. There is a circulation pump in the water supply tank, and the circulation pump is connected to the pressure water tank through the upper water pipe; the device also includes medium, large, and small A medium-diameter test pipe, a large-diameter test pipe, and a small-diameter test pipe whose diameters are connected in sequence and on a straight line. One end of the medium-diameter test pipe is connected to the pressure water tank, and a flow regulating valve is connected to the small-diameter test pipe; in the A tracer liquid injection pipe is installed in the pressure water tank. One end of the tracer liquid injection pipe extends out of the pressure water tank and is connected to the tracer liquid container. A tracer liquid valve is connected to the outlet of the tracer liquid container. One end of the tracer liquid injection pipe is connected to the pressure water tank. The water tank extends out and into the interior of the medium diameter test pipe. The utility model connects three test pipes with different diameters in series, so that three phenomena of laminar flow, turbulent flow and transitional patterns can be seen at the same time.

Description

Integrated device that displays multiple water flow patterns

Technical field

The utility model relates to the field of fluid testing, and in particular to an integrated display device for displaying multiple water flow patterns.

Background technique

The Reynolds test is a test that observes different water flow patterns and their transformation processes during liquid flow, determines the corresponding critical Reynolds number, and increases understanding of water flow patterns.

According to Reynolds test formula It can be seen that the Reynolds number is related to the flow rate, pipe diameter and kinematic viscosity coefficient. In an existing classic Reynolds experiment, the pipe diameter and kinematic viscosity coefficient remain unchanged, three liquid flow patterns are observed by changing the flow rate, and then the flow rate obtained by observing the liquid flow pattern is used to calculate, and the upper and lower Critical Reynolds number. Since the judgment of the upper and lower critical Reynolds numbers is obtained by observing the shape of the tracer liquid in the tube with human eyes, there will be errors in the judgment process. These errors will also be reflected in the flow rate. The calculated Reynolds number It is also not accurate enough, and this Reynolds experimental device can only observe one flow pattern, and cannot observe three flow patterns at the same time. The experimental steps are single, and the valve needs to be adjusted repeatedly to change the flow rate and flow rate. Each time the valve is adjusted, a Only after the condition is stable can you continue to adjust or record data, and repeated adjustments to the flow rate will also affect the test results. The utility model patent with announcement number CN210244782U can observe three water flow patterns simultaneously in three parallel test pipes, but the flow rate is still obtained through experiments, and then the Reynolds number is calculated; the injection speed of the test tracer needs to be consistent with the main body The flow rate of the fluid is similar and slightly lower. As the water flow rate increases, the tracer injection flow rate needs to be adjusted accordingly to obtain better test results. The tracer liquid has high viscosity and is easy to stick to the pipe wall, indicating that The tracer liquid pipeline is not easy to clean; and the length of the tracer liquid pipeline deep into the experimental pipeline is very short, and the tracer liquid flowing into the test pipeline is prone to turbulence, which affects the experimental results.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an integrated display device for multiple water flow patterns. Three test pipes of different diameters are connected in series, so that laminar flow and turbulent flow can be seen at the same time. and three phenomena of transitional forms.

The purpose of the utility model is achieved as follows: a device that integrates multiple water flow patterns, including a pressure water tank and a water supply tank. A circulation pump is provided in the water supply tank, and the circulation pump is connected to the pressure water tank through an upper water pipe; the device also includes a pressure water tank according to the The medium diameter test pipe, the large diameter test pipe and the small diameter test pipe are connected in sequence and in a straight line. One end of the medium diameter test pipe is connected to the pressure water tank, and the small diameter test pipe is connected to the flow regulator. Valve; a tracer liquid injection pipe is provided in the pressure water tank, one end of the tracer liquid injection pipe extends out of the pressure water tank and is connected to a tracer liquid container, a tracer liquid valve is connected to the outlet of the tracer liquid container, and the tracer liquid is injected One end of the tube extends from the pressure tank and into the interior of the medium diameter test pipe.

Preferably, a vertical overflow plate is connected in the pressure water tank, and the overflow plate divides the pressure water tank into a water stabilizing tank and an overflow tank; a vertical water stabilizing orifice plate is connected in the water stabilizing tank, and the water stabilizing orifice plate is connected to the back of the water stabilizing orifice plate. A vertical water stabilizing baffle is provided on one side of the overflow plate, and the lower end of the water stabilizing baffle is connected to the water stabilizing tank; the water supply pipe is connected to the water stabilizing tank, and the outlet of the water supply pipe is arranged between the overflow plate and the water stabilizing orifice plate. Between them, the overflow tank is connected with the water supply tank through the overflow pipe.

Preferably, a convenient tracer liquid interface mechanism is connected to the water stabilizing baffle through a position adjustment mechanism; a tracer liquid conduit is connected between the tracer liquid injection pipe and the tracer liquid container, and the tracer liquid conduit and the tracer liquid container are connected. The tracer liquid injection pipes are all connected to the convenient tracer liquid interface mechanism.

Preferably, the position adjustment mechanism includes a sliding track and screws, the sliding track is vertically connected to the water stabilizing baffle, and the screws are cooperatively arranged on the sliding track; the convenient tracer liquid interface mechanism includes a shell, and the screws are connected to the shell. On the body, an elbow pipe is provided in the housing, and both ends of the elbow pipe are connected to first quick interfaces, one of the first quick interfaces is connected to the tracer liquid injection pipe, and the other quick interface is connected to the tracer liquid conduit.

Preferably, the tracer fluid conduit and the tracer fluid container are connected through a second quick interface.

Preferably, the tracer liquid injection tube is made of rigid material.

Preferably, the angle of the gradually expanding part connecting the medium diameter test pipe and the large diameter test pipe is between 5° and 10°; the angle of the tapering part connecting the large diameter test pipe and the small diameter test pipe is between 5° and -10°. 10°.

Preferably, the length of the tracer liquid injection pipe is 150 times the diameter of the medium-diameter test pipe.

Preferably, a water measuring container is provided below the outlet of the small diameter test pipe, and the water measuring container is connected to the water supply tank through the pipe.

Preferably, a flow meter is connected to the large-diameter test pipe.

The beneficial effects of this utility model are:

1. This utility model has a simple structure and is easy to operate. It can present three water flow patterns at the same time, which solves the impact of repeated adjustment of flow rate on experimental results and saves experimental time.

2. This utility model obtains different pipe diameters to observe the water flow pattern by giving the Reynolds number and flow rate, which not only reduces the experimental error, but also saves the time to wait for the water flow state to stabilize when adjusting the flow rate.

3. The tracer liquid conduit and tracer liquid injection pipe of the present utility model are connected to the tracer liquid container and the convenient tracer liquid interface mechanism by a quick interface, so the convenient tracer liquid interface mechanism, the tracer liquid conduit, and the tracer liquid The injection pipe can be disassembled and cleaned to prevent the tracer liquid from becoming too viscous and clogging the water pipe.

4. After determining the pipe diameter through calculation, you can get better test results by simply following the test steps. This not only improves the test efficiency, but also provides convenience and can also mobilize the enthusiasm of the operator to do the experiment. Determine through calculation Pipe diameter, you can also become more familiar with the formula of Reynolds experiment.

5. The utility model uses a circulating pump instead of the submersible pump in the traditional experiment, which extends the use time of the pump device and reduces the cost.

6. The tracer liquid injection pipe of this utility model that directly penetrates into the medium-diameter test pipe is longer than the traditional tracer liquid injection pipe, which increases the stability of the tracer liquid flowing into the medium-diameter test pipe.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Figure 2 is an enlarged view of part A in Figure 1.

In the figure, 1 is a flow regulating valve, 2 is a water measuring container, 3 is a small diameter test pipe, 4 is a large diameter test pipe, 5 is a medium diameter test pipe, 6 is a stable water tank, 7 is an overflow tank, and 8 is a convenient indicator. Tracer liquid interface mechanism, 9 is the tracer liquid container, 10 is the tracer liquid valve, 11 is the tracer liquid conduit, 12 is the tracer liquid injection pipe, 13 is the water stabilizing orifice plate, 14 is the water stabilizing baffle, 15 is Overflow plate, 16 is the water supply tank, 17 is the circulation pump, 18 is the flow meter, 19 is the first quick interface, 20 is the position adjustment mechanism, 201 is the sliding track, 202 is the screw, 21 is the pressure water tank, 22 is the shell , 23 is an elbow pipe, 24 is a second quick interface, and 25 is a water supply pipe.

Detailed ways

As shown in Figures 1 and 2, the device for integrating multiple water flow patterns includes a pressure water tank 21 and a water supply tank 16. A vertical overflow plate 15 is connected to the pressure water tank 21. The overflow plate 15 connects the pressure water tank 21 to It is divided into a stable water tank 6 and an overflow tank 7.

A vertical water stabilizing orifice plate 13 is connected in the water stabilizing tank 6. A vertical water stabilizing baffle 14 is provided on the side of the water stabilizing orifice plate 13 facing away from the overflow plate 15. The lower end of the water stabilizing baffle 14 is in contact with the water stabilizing tank. 6 connections. A circulation pump 17 is provided in the water supply tank 16. The circulation pump 17 is connected to the water stabilizing tank 6 through an upper water pipe 25. The outlet of the upper water pipe 25 is arranged between the overflow plate 15 and the water stabilizing orifice plate 13. The overflow tank 7 passes through the overflow pipe. The pipe is connected to the water supply tank 16. The design of the water stabilizing orifice plate 13 and the water stabilizing baffle 14 reduces the impact of water flow in the upper water pipe 25 on the experiment and the convenient tracer fluid interface mechanism 8.

The utility model also includes a medium-diameter test pipe 5, a large-diameter test pipe 4, and a small-diameter test pipe 3 that are connected in sequence according to the medium, large, and small diameters and are in a straight line. The medium-diameter test pipe 5 is connected to the large-diameter test pipe 4. The angle of the tapered part connecting the large diameter test pipe 4 and the small diameter test pipe 3 is between 5° and 10°. One end of the medium-diameter test pipe 5 is connected to the water stabilizing tank 6, a flow meter 18 is connected to the large-diameter test pipe 4, a flow regulating valve 1 is connected to the small-diameter test pipe 3, and a flow meter is set below the outlet of the small-diameter test pipe 3 The water container 2 and the water measuring container 2 are connected with the water supply tank 16 through pipes.

A position adjustment mechanism 20 is provided on the water stabilizing baffle 14. The position adjustment mechanism 20 includes a sliding rail 201 and screws 202. The sliding rail 201 is vertically connected to the water stabilizing baffle 14, and the screws 202 are cooperatively arranged on the sliding rail 201.

A tracer liquid injection pipe 12 and a tracer liquid conduit 11 are provided in the water stabilizing tank 6. The tracer liquid injection pipe 12 is made of rigid material. The convenient tracer liquid interface mechanism 8 includes a housing 22, and a screw 202 is connected to the housing 22. An elbow 23 is provided in the housing 22. The elbow 23 should be as large as possible to reduce the turbulence of the tracer liquid caused by the contraction of the pipeline. Both ends of the tube 23 are connected to first quick interfaces 19. One of the first quick interfaces 19 is connected to the tracer liquid injection pipe 12, and the other quick interface 19 is connected to the tracer liquid conduit 11. The tracer liquid conduit 11 passes through the second The quick interface 24 is connected to the tracer liquid container 9 and can be disassembled. The tracer liquid container 9 is located above the pressure water tank 21, and the tracer liquid valve 10 is connected to the outlet of the tracer liquid container 9. The other end of the tracer liquid injection pipe 12 extends from the water stabilizing tank 6 and extends into the inside of the medium-diameter test pipe 5. The length of the tracer liquid injection pipe 12 is 150 times the diameter of the medium-diameter test pipe 5. The position adjustment device 20 is used to adjust the position of the convenient tracer liquid interface mechanism 8 so that the tracer liquid injection pipe 12 is located on the axis of the test pipeline.

The method of observing three liquid flow patterns using this utility model includes the following steps:

Step 1: Determine the diameters of the three test pipes.

According to the formula

It can be seen that when the flow rate Q is determined and the water temperature is consistent, Re ₁ d ₁ =Re ₂ d ₂ =Re ₃ d ₃ .

When Re<2320, the liquid flow is laminar flow; when Re>2320, the liquid flow is turbulent flow. In this embodiment, Re ₁ =1000, Re ₂ =2000, and Re ₅ =5000 are selected to determine the diameters of the three test pipes, and the corresponding pipe diameter ratio is d ₁ =2d ₂ =5d ₅ . As shown in Figure 1.

Among them, d ₁ is the large diameter test pipe, d ₂ is the medium diameter test pipe, and d ₅ is the small diameter test pipe.

Step 2: Before the test, connect the tracer liquid container 9, tracer liquid conduit 11, tracer liquid injection pipe 12, and convenient tracer liquid interface mechanism 8 in the stable water tank 6, and adjust the position of the tracer liquid injection pipe 12 so that It is placed on the central axis of the medium-diameter test pipe 5.

Step 3: Install the flow meter 18 on the large-diameter test pipe 4 (or other locations), turn on the circulation pump 17, keep the water tank in the overflow state, slowly turn the flow regulating valve 1, and observe the flow meter indication. After reaching Q , stop adjusting valve 1.

Step 4: After the water flow stabilizes, open the tracer liquid valve 10. You can see that the tracer liquid bends and swings in the medium-diameter test pipe 5, showing a transition zone state; the tracer liquid in the large-diameter test pipe 4 shows a straight line state. It is laminar flow; in the small test pipe 3, it is seen that the tracer liquid flow beam is spread out, which is turbulent flow.

The above is only used to illustrate the technical solution of the present utility model without limiting it. Other modifications or equivalent substitutions made by those of ordinary skill in the art to the technical solution of the present utility model can be made without departing from the spirit and scope of the technical solution of the present utility model. , should be covered by the scope of claims of the present utility model.

Claims (10)

1. Device of integration show many water flow patterns, characterized by: comprises a pressure water tank (21) and a water supply tank (16), wherein a circulating pump (17) is arranged in the water supply tank (16), and the circulating pump (17) is communicated with the pressure water tank (21) through a water supply pipe (25); the device also comprises a middle-diameter test pipeline (5), a large-diameter test pipeline (4) and a small-diameter test pipeline (3) which are sequentially connected according to the middle diameter, the large diameter and the small diameter, wherein one end of the middle-diameter test pipeline (5) is communicated with a pressure water tank (21), and the small-diameter test pipeline (3) is connected with a flow regulating valve (1); the tracer liquid injection pipe (12) is arranged in the pressure water tank (21), one end of the tracer liquid injection pipe (12) extends out of the pressure water tank (21) and then is connected with the tracer liquid container (9), an outlet of the tracer liquid container (9) is connected with the tracer liquid valve (10), and one end of the tracer liquid injection pipe (12) extends out of the pressure water tank (21) and extends into the middle-diameter test pipeline (5).

2. The integrated device for displaying multiple water flow patterns according to claim 1, wherein: a vertical overflow plate (15) is connected in the pressure water tank (21), and the overflow plate (15) divides the pressure water tank (21) into a steady water tank (6) and an overflow tank (7); a vertical water stabilizing pore plate (13) is connected to the water stabilizing tank (6), a vertical water stabilizing baffle (14) is arranged on one side of the water stabilizing pore plate (13) back to the overflow plate (15), and the lower end of the water stabilizing baffle (14) is connected with the water stabilizing tank (6); the water supply pipe (25) is communicated with the water stabilizing tank (6), an outlet of the water supply pipe (25) is arranged between the overflow plate (15) and the water stabilizing pore plate (13), and the overflow tank (7) is communicated with the water supply tank (16) through an overflow pipe.

3. The device for integrally displaying multiple water flow patterns according to claim 2, wherein: the water stabilizing baffle (14) is connected with a convenient tracer liquid interface mechanism (8) through a position adjusting mechanism (20); a tracer liquid conduit (11) is connected between the tracer liquid injection pipe (12) and the tracer liquid container (9), and the tracer liquid conduit (11) and the tracer liquid injection pipe (12) are both connected with a convenient tracer liquid interface mechanism (8).

4. A device for integrally displaying multiple water flow patterns according to claim 3 wherein: the position adjusting mechanism (20) comprises a sliding track (201) and a screw (202), the sliding track (201) is vertically connected to the water stabilizing baffle (14), and the screw (202) is matched with the sliding track (201); the convenient tracer liquid interface mechanism (8) comprises a shell (22), a screw (202) is connected to the shell (22), an elbow (23) is arranged in the shell (22), two ends of the elbow (23) are connected with a first quick interface (19), one of the first quick interfaces (19) is connected with a tracer liquid injection pipe (12), and the other quick interface (19) is connected with a tracer liquid guide pipe (11).

5. A device for integrally displaying multiple water flow patterns according to claim 3 wherein: the tracer liquid conduit (11) is connected with the tracer liquid container (9) through a second quick connector (24).

6. The integrated device for displaying multiple water flow patterns according to claim 1, wherein: the tracer liquid injection pipe (12) is made of rigid materials.

7. The integrated device for displaying multiple water flow patterns according to claim 1, wherein: the angle of the gradually-expanding part of the middle-diameter test pipeline (5) connected with the large-diameter test pipeline (4) is 5-10 degrees; the angle of the taper part of the large-diameter test pipeline (4) connected with the small-diameter test pipeline (3) is 5-10 degrees.

8. The integrated device for displaying multiple water flow patterns according to claim 1, wherein: the length of the tracer injection pipe (12) is 150 times the diameter of the medium-diameter test pipeline (5).

9. The integrated device for displaying multiple water flow patterns according to claim 1, wherein: and a water container (2) is arranged below the outlet of the small-diameter test pipeline (3), and the water container (2) is communicated with a water supply tank (16) through a pipeline.

10. The integrated device for displaying multiple water flow patterns according to claim 1, wherein: a flowmeter (18) is connected to the large diameter test pipe (4).