Fluid mechanics exploratory experiment device for measuring vacuum degree of tee joint

Abstract

The invention relates to a fluid mechanics exploratory experiment device for measuring the vacuum degree of a tee joint. The fluid mechanics exploratory experiment device comprises an experiment table 12, an experiment table support 11, a water supply tank system 1, pipeline systems 2 and 6, adjusting systems 3 and 4, vacuum degree measuring systems 5, 6, 7 and 8, a water collection tank system 9 and a collection backflow system 10. The pipeline system comprises a water supply pipe 2 and a measuring water pipe 6; the adjusting system comprises a guide rail 3 and a sliding block 4 which are used for adjusting flow; the vacuum degree measuring system comprises a three-way pipe 5, a thin pipe 7 for measuring the vacuum degree and a water tank 8; the collection backflow system comprises a water return pipe led out of the water collection tank 9 and a water pump 10. The flow in the water supply tank is changed by adjusting the sliding block on the guide rail, so that water columns with different heights are generated in the thin pipe in the process that water flow sequentially passes through the water supply pipe, the three-way pipe connected to the guide rail, the water pipe at the measuring position, the vacuum degree measuring thin pipe and the water tank, and the vacuum degree at the three-way position is measured; meanwhile, the length or the pipe diameter of the water supply pipe and the three-way pipe can be changed by fixing the height of the sliding block, and exploration and measurement of other factors influencing the vacuum degree are achieved. Compared with the prior art, the experimental device has the advantages that variables are easy to control, experimental data acquisition is accurate and efficient, the using process is simple, safe and reliable, and experimental consumption is reduced by arranging a collection backflow system.

Description

Technical Field

[0001] The invention relates to a fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee, belonging to the technical field of new energy and energy saving. Background Art

[0002] The purpose of setting up the fluid mechanics experiment is to cultivate students' hands-on ability and innovation ability, so that students can observe, discover, think about problems and then form the ability to solve problems in the experiment, meeting the development needs of modern talent training. However, the existing fluid mechanics experiments are classic experiments that have been around for hundreds of years, with mature experimental equipment. Students just mechanically follow the process to operate, record data, and process results, which is out of touch with the purpose of setting up the experimental link, let alone the cultivation of innovation ability.

[0003] The purpose of setting up the fluid mechanics experiment is to cultivate students' hands-on ability and innovation ability, so that students can observe, discover, think about problems and then form the ability to solve problems in the experiment, meeting the development needs of modern talent training. However, the existing fluid mechanics experiments are classic experiments that have been around for hundreds of years, with mature experimental equipment. Students just mechanically follow the process to operate, record data, and process results, which is out of touch with the purpose of setting up the experimental link, let alone the cultivation of innovation ability.

[0004] This experimental device originated from the development of a siphon overflow liquid level control device. During the development of the siphon overflow liquid level control device, it was found that the vacuum formed by the flow field at the tee had an important influence on the operating characteristics of the device. However, due to the many influencing factors, only the device application was realized during the development of the project, and the research on the influencing factors and mechanisms of the tee flow field vacuum was not in-depth enough, so it is necessary to carry out relevant research.

[0005] The features and innovations of the present invention are as follows: 1) It originates from an actual development topic and has a broad engineering application background; 2) The knowledge points and main research contents involved in the experimental device are closely related to the theoretical part of fluid mechanics, which is within the knowledge mastered by most people in the industry and students; 3) There are many factors that affect the vacuum degree of the three-way flow field. This experimental device can effectively realize the sequential measurement and research of the variables involved through the control variable method. Summary of the invention

[0006] In order to solve the defects existing in the prior art, the purpose of the present invention is to provide a fluid mechanics exploratory experimental device for measuring the vacuum degree at the three-way. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] The invention discloses a fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee, comprising four parts: an experimental table, a water supply system, a water return system, and a regulating and measuring system.

[0008] As a preferred embodiment, a fluid mechanics exploratory experimental device for measuring the vacuum degree at the tee is provided, which includes four parts: an experimental table, a water supply system, a return water system, and a regulating and measuring system. The system is a recyclable whole during the experiment, and all parts can be disassembled and replaced; the water supply tank is actually a constant liquid level tank, which has two partitions inside: a low-height non-porous plate is provided on the side away from the measuring device, and water flows through the top of the plate and overflows into the outermost side of the water tank, and at the same time flows back to the return water tank through the overflow pipe on the lower side of the water tank to ensure the constant liquid level of the water supply tank; a porous flow stabilizing plate is provided on the side near the measuring device, and water can flow through the holes to the front section of the water tank for use in the three-way experimental section to ensure the stability of the liquid level of the water supply tank; at the same time, a water pipe with a water pump device is provided on the lower side, which can pump water in the return water tank back to the water supply tank; in this way, the constant liquid level in the water tank and the recycling of water are achieved.

[0009] Preferably, during the experiment using the present experimental device, a total of four variables can be measured for their effects on the degree of vacuum: by changing the height of the slider on the guide rail, the height difference between the slider and the water supply tank is changed, thereby achieving the purpose of changing the flow rate and thus measuring the degree of vacuum under different conditions; by fixing the slider height, by changing the length of the water supply pipe on the front side of the guide rail, the length of the path for the water flow to enter the measuring system is changed, thereby achieving the purpose of changing the resistance along the system and thus measuring the degree of vacuum under different conditions; by fixing the slider height, by changing the length of the three-way pipe on the rear side of the guide rail, the length of the path for the water flow to enter the measuring system is changed, thereby achieving the purpose of changing the resistance along the system and thus measuring the degree of vacuum under different conditions; by fixing the slider height and the inlet and outlet pipe lengths, by changing the diameters of the water supply pipe and the three-way pipe before and after the guide rail, the purpose of measuring the degree of vacuum under conditions of different pipe diameters is achieved.

[0010] The present invention provides a fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee. The difference from the existing design is that the original implementation device designs the return water system and the water tank used for measuring the vacuum degree into a whole, that is, one water tank takes into account two functions. This will cause a siphon flow when the vacuum degree is too large. Although the thinking background of the present invention is to study the siphon overflow device, such a design is likely to cause the variables to be uncontrollable during the experiment, and the data collected in the experiment are affected by many factors, and the specific parameters of each influencing factor cannot be determined. The present invention divides the water supply system, the return water system, and the regulation and measurement system into three independently working individuals, and at the same time the three are unified as a whole to form the entire experimental device. During the experiment, the water tank and the capillary that generate the vacuum degree to absorb water act separately, and the return water system circulates separately to the water supply system, which will not produce the above-mentioned effects, and is convenient for conducting experiments, collecting data, and analyzing and studying. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1A three-dimensional structural diagram of a fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee implemented in this example;

[0012] Figure 2 A front plan view of a fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee implemented in this example. DETAILED DESCRIPTION

[0013] In order to make the technical means of the present invention and the technical effects that can be achieved more clearly and completely disclosed, an embodiment is provided herewith and described in detail as follows in conjunction with the accompanying drawings:

[0014] like Figure 1-Figure 2 As shown, a fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee in this embodiment includes four parts: a test bench, a water supply system, a return water system, and a regulating and measuring system.

[0015] The first part is the experimental bench, including Figure 1-Figure 2 As shown, a fluid mechanics exploratory experimental device for measuring the vacuum degree at a three-way joint of this embodiment includes four parts: an experimental table 12 and a support system 11. The entire experimental process can be carried out on this experimental table.

[0016] The second part is a water supply system, including a water supply tank 1, a water supply pipe 2, and a return water pipe port 10. Since the water supply system and the return water system are interconnected, a water pipe port is provided at the lower side of the water supply tank for connecting the return water pipe to realize the recycling of the system.

[0017] The third part is the return water system, including the return water tank 9, the return water pipe and the water pump 10. In the whole experimental system, only the return water tank is placed under the experimental table. During the experiment, there is no need to pay too much attention to the work of the return water system. The water pump set on the return water pipe pumps the water after the experiment into the water supply system for later use.

[0018] The fourth part is the adjustment and measurement system, including the adjustment system and the vacuum measurement system. The adjustment system includes a guide rail 3, a slider 4, a connection device on the front and rear sides, and a three-way pipe 5; the vacuum measurement system includes a thin tube 7 for measuring the vacuum degree, a water tank 8, and a flexible hose 6 connected to the three-way pipe. This part is the core part of the entire experimental device. This device can realize independent adjustment of each variable. In addition to the return water system and this system being independent entities, it is also inseparable from the fact that each component in this part can be replaced or adjusted. Through simple operation, other variables can be controlled to a fixed value. At the same time, the adjustment of the measured variables, especially the operation of changing the flow rate through the guide rail and the slider, is also relatively simple. It improves the popularity and application level of the experimental bench system.

[0019] The above content is a further detailed description of the technical solution provided in combination with the preferred implementation mode of the present invention. It cannot be determined that the specific implementation of the present invention is limited to the above descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee, comprising a test bench, a water supply system, a return water system, and a regulating and measuring system.

2. A fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee as claimed in claim 1, characterized in that: The four systems are a recyclable whole during the experiment, and each part can be disassembled and replaced.

3. A fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee as claimed in claim 1, characterized in that: By changing the height of the slider on the guide rail, the height difference between it and the water supply tank is changed, thereby achieving the purpose of changing the flow rate and then measuring the vacuum degree under different conditions.

4. A fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee as claimed in claim 1, characterized in that: The height of the slider is fixed, and the length of the water supply pipe and the tee pipe before and after the guide rail is changed to change the length of the path for the water flow to enter the measuring system, thereby achieving the purpose of changing the tee structure and then measuring the vacuum degree under different conditions.

5. A fluid mechanics exploratory experimental device for measuring the vacuum degree at a tee as claimed in claim 1, characterized in that: The height of the slider and the length of the inlet and outlet pipes are fixed, and the diameters of the water supply pipes and the three-way pipes before and after the guide rail are changed to achieve the purpose of measuring the vacuum degree under different pipe diameters.

6. As claimed in claim 2, it is characterized in that: The water supply tank is actually a constant liquid level tank with two partitions inside: a relatively low non-porous plate is provided on the side away from the measuring device, and water flows through the top of the plate and overflows into the outermost side of the water tank, and at the same time flows back to the return water tank through the overflow pipe on the lower side of the water tank, ensuring a constant liquid level in the water supply tank; a multi-porous flow stabilizing plate is provided on the side close to the measuring device, and water can flow through the holes to the front section of the water tank for use in the three-way experimental section, ensuring a stable liquid level in the water supply tank; at the same time, a water pipe with a water pump device is provided on the lower side, which can pump water in the return water tank back to the water supply tank; in this way, the liquid level in the water tank can be kept constant and water can be recycled.

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