CN2777677Y - Water tank for teaching experiment - Google Patents

Abstract

The utility model provides a water tank for teaching experiments, which includes a water tank, a water pump, a water inlet pipe section, an experimental water tank, a flow meter, a throttle valve, a measuring needle, and a pipe tube. Arranged in parallel, the water outlet of the water inlet pipe section and the water inlet of the experimental water tank are located at the head of the experimental water tank, the water inlet pipe section is connected to the experimental water tank through the head, the water tank is below the tail of the experimental water tank, the water outlet at the end of the experimental water tank is directly facing the water tank, flowmeter and throttling The valve is installed in the inlet pipe section. The water outlet at the end of the experimental tank is equipped with a control gate for adjusting the water depth. Below the water inlet of the experimental tank is the transition curve shape. A rectifying grid is installed at the outlet of the water inlet pipe section. The middle part of the experimental water tank is equipped with a measuring needle for measuring bottom elevation and water surface elevation and a Pitot tube for measuring flow velocity which can move in the experimental section of the water tank. Slots are reserved for installing experimental weirs and various opening gates in the middle of the experimental tank.

Description

teaching experiment water tank

technical field

The utility model relates to a water tank for teaching experiments, which is used for teaching demonstration and measurement of various open channel water flows in the discipline of hydraulics or fluid mechanics. The equipment is mainly used in teaching laboratories of hydraulics or fluid mechanics courses, and can also be used in laboratory teaching of water conservancy, water supply and drainage and other related courses. It is mainly used to help students understand various open channel water flow phenomena and understand the basic content of open channel flow learned in class.

Background technique

Open channels are a common and important engineering measure in various water conservancy projects and water supply and drainage projects. Such as drainage channels for irrigation, shipping channels, aqueduct channels and flood discharge channels for hydropower stations, water diversion channels and drainage channels for water supply, etc. Generally, various hydraulic structures such as practical weirs, wide-crested weirs, and sluices are built on these channels. Therefore, the flow of water in open channels is very complicated, and there are various open channel water flow phenomena. These water flow phenomena are relatively abstract, especially for beginners, it is difficult to understand. This requires the simulation experiment of the tank to let the students observe and explain to the students on the spot. In addition, in the course teaching of hydraulics, the measurement experiments of the flow velocity distribution of the open channel section and the measurement experiments of the discharge coefficients of various weirs and sluices are the basic experiments stipulated in the outline, and these measurement experiments need to be completed in the flume.

Since the establishment of a water tank that can represent various open channel water flow phenomena and measure open channel water flow parameters requires a complete set of water supply and drainage systems, flow measurement devices, and control systems. At present, laboratory sinks are divided into large and small. Under normal circumstances, the structure of the large-scale tank is a glass-steel frame structure. The water supply and drainage system needs to establish a relatively large reservoir and water pump water tower and other pumping systems. The flow measurement device is generally a thin-walled weir, and electromagnetic flowmeters are also useful. The construction of large tanks requires more funds and floor space. Affected by factors such as laboratory scale, capital and floor space, many laboratories also build small tanks. At present, the small sinks used in the laboratory are mostly glass-steel frame structures (also have plexiglass-steel frame structures). The water supply and drainage systems are composed of upper water tanks, lower water tanks and water pumps. The structure of the whole system is like a Miniaturized large sink system. The flow measuring device is generally also a thin-walled weir. This type of small water tank has the disadvantages of large footprint and inconvenient operation.

Contents of the invention

The purpose of the utility model is to propose a small water tank system with small footprint, convenient operation and practicality.

Technical scheme of the present utility model: the teaching experiment water tank of the present utility model includes a water tank, a water pump, a water inlet pipe section, an experimental water tank, a flow meter, a throttle valve, a measuring needle, and a bi-custodian, and is characterized in that: the water inlet pipe section is in the experimental water tank The bottom is arranged in parallel with the experimental water tank. The water inlet of the water inlet pipe section and the water inlet of the experimental water tank are both located at the head of the experimental water tank. The water inlet pipe section is connected to the experimental water tank through the head. The water tank is below the tail of the experimental water tank. The meter and throttle valve are installed in the inlet pipe section.

The water tank for teaching experiments is equipped with a control gate for adjusting the water depth at the water outlet at the end of the experiment water tank or at the water tank in front of the water outlet.

In the teaching experiment water tank, the lower part of the water inlet of the experiment water tank is in the shape of a transition curve.

The water tank for teaching experiments is equipped with a rectifying grid at the outlet of the water inlet pipe section to make the water flow into the water tank for experiments smoothly.

In the teaching experiment water tank, a measuring needle capable of measuring bottom elevation and water surface elevation and a Pitot tube capable of measuring flow velocity are installed in the middle of the experimental water tank, and the measuring needle and Pitot tube are placed on a bracket, and the bracket can be moved in the water tank experiment section .

In the teaching experiment water tank, slots for installing practical weirs, wide-crested weirs, thin-walled weirs and various opening gates are reserved in the middle of the experimental water tank.

Advantage of the utility model:

1. The equipment adopts a vertical compact circulation structure, the upper part is the experimental section composed of the tank body, and the lower part is the water inlet section. The water inlet section is connected to the experimental section through the head. The water tank is under the test section and the water inlet section, which reduces the floor space and saves the upper water tank required by the conventional water tank;

2. The water inlet section adopts a round pipe, and a turbine flowmeter and a throttle valve are installed at an appropriate position in the middle of the water inlet section. The throttle valve is used to control the flow of water entering the experimental water tank, and the flow rate is measured by the turbine flowmeter, which is convenient for calculating various experimental parameters;

3. The water inlet of the water inlet section is in the water tank, and a submersible pump is installed at the inlet, and the water in the water tank is directly entered into the experimental tank section by the submersible pump from the water inlet pipe section. The water outlet at the rear of the experimental water tank is directly facing the water tank, and the water in the experimental water tank is directly discharged into the water tank from the water outlet. The control gate for adjusting the water depth can conveniently control the water level of the experimental water tank;

4. A slot is reserved in the middle of the experimental tank section, which is convenient for installing practical weirs, wide-crested weirs, thin-walled weirs and gates of various openings, as well as movable needle racks for measuring water depth and complete meters for measuring flow velocity. Hosting, it is convenient to carry out experiments on various water flow phenomena and measure related data.

5. The utility model is compact in structure, small in size and relatively high in precision. The compact head uses a special transition curve at the water inlet of the experimental water tank, and a rectifying grid is installed at the outlet of the water inlet pipe section to make the water flow into the experimental water tank smoothly.

Description of drawings

Fig. 1 is the structural representation of the teaching experiment water tank of the present utility model;

Fig. 2 is a structural schematic diagram of a top view of the teaching experiment water tank of the present invention.

In the figure: 1 is the water pump; 2 is the water inlet pipe section; 3 is the turbine flowmeter; 3-1 is the flowmeter instrument; 4 is the throttle valve; 5 is the rectification grid; 6 is the head of the experimental water tank; ; 7-1 is the transition curve below the water inlet of the experimental tank; 8 is the stylus; 8-1 is the bracket of the stylus; 9 is the Pitot tube for measuring the flow rate; -2 is the pycnometer supporting the Pitot tube; 10 is the model (wide crest weir); 10-1 is the slot; 11 is the experimental water tank; 12 is the water outlet of the experimental water tank; 13 is the water tank; 14 is the water inlet pipe section outlet 15 is an experimental tank support; 16 is a control gate (tailgate) for adjusting water depth; 17 is a workbench.

Detailed ways

As shown in Figures 1 and 2: the submersible pump 1 in the water tank 13 pumps water into the water inlet pipe section 2, and passes through the turbine flowmeter 3 installed in the water inlet pipe section 2, the throttle valve 4, the rectifying grid 5, and the head 6, Enter the experimental section of the experimental water tank 11 from the water inlet 7 of the experimental water tank. After the water passes through the test section, it flows into the water tank 13 from the water outlet 12 at the rear of the water tank 11 .

The water outlet 14 of the water inlet pipe section 2 in the head 6 is equipped with a rectifying grid 5, and the bottom 7-1 of the water inlet 7 of the water tank 11 is in the shape of a transition curve, which can make the water form a relatively smooth, wave-like pattern in the experimental water tank section. Small water flow, in order to facilitate the development of various experiments.

A slot 10-1 for convenient installation or removal of the model 10 is reserved in the tank body of the water tank, and brackets 8-1, 9-1, etc. for placing the probe 8 and the pit tube 9 are also reserved.

The model 10 can be a thin-walled weir, a utility weir, a wide-crested weir, and a gate. Installing the above-mentioned device combined with the measuring needle 8 can carry out the measurement experiments of the flow coefficients of various weirs and sluices, and the demonstration experiment of the complex flow phenomenon after the water flows through various weirs and sluices. The brackets 8-1, 9-1 for placing the Pitot tube 9 and the measuring needle 8 can move in the whole tank body 10 of the water tank. Through the Pitot tube 9, combined with the measuring needle 8, the measurement experiment of the flow velocity distribution in the open channel section can be carried out. 15 is the support of experimental water tank 11; 16 is the control gate of adjusting water depth, and it adjusts the water depth in the experimental tank body together with throttle valve 4.

Water pump 1 The pump body and blades are made of aluminum alloy and copper, which can effectively prevent the water from discoloration due to rust; the throttle valve made of plastic material is better.

The entire experimental tank uses plexiglass plates, which can observe the water flow phenomenon without obstacles.

The experimental water tank can be attached with a small workbench 17, and the workbench 17 can place the display instrument 3-1 of the turbine flowmeter 3, and the matching pressure gauge 9-2 of the Pitot tube. This workbench can also be used by students for recording and calculation when taking measurements.

Claims (6)

1. education experiment tank, comprise water tank, water pump, water inlet segment, experimental trough, flowmeter, throttling valve, chaining pin, Pitot tube, it is characterized in that: water inlet segment below experimental trough with the experimental trough parallel arranged, water inlet segment water delivering orifice and experimental trough water inlet all are positioned at the experimental trough stem, water inlet segment connects experimental trough by stem, water tank is below the experimental trough afterbody, experimental trough afterbody water delivering orifice is directly to water tank, and flowmeter and throttling valve are installed in the water inlet segment.

2. education experiment tank according to claim 1 is characterized in that: the control gate of the scalable tank depth of water is equipped with at the tank place before the experimental trough afterbody water delivering orifice.

3. education experiment tank according to claim 1 and 2 is characterized in that: below, experimental trough water inlet is the transient curve shape.

4. education experiment tank according to claim 1 and 2 is characterized in that: the water inlet segment exit is equipped with the honeycomb screen that can make current steadily enter experimental trough.

5. education experiment tank according to claim 1 and 2, it is characterized in that: the experimental trough middle part is equipped with can measure bottom elevation, the chaining pin of water level elevation and the Pitot tube of measurable flow speed, and chaining pin and Pitot tube place can be on the carriage that tank moves.

6. education experiment tank according to claim 1 and 2 is characterized in that: the slot that practical weir, broad-crested weir, sharp-crested weir and various aperture gates are installed is reserved at the experimental trough middle part.

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