Hydromechanics open type experiment platform

Abstract

The utility model relates to the technical field of experiment teaching, and discloses a fluid mechanics open type experiment platform which comprises a frame, a constant-pressure water tank and a water storage tank, the water storage tank is installed at the bottom of the frame, and the constant-pressure water tank is installed in the frame; a water pump is arranged in the water storage tank, a water supply pipe is installed at the output end of the water pump, the other end of the water supply pipe extends into the constant-pressure water tank, and an overflow pipe is installed in the water storage tank. According to the open type experimental platform for hydromechanics, the open type ports are arranged to be matched with the porous experimental table top, more than three types of experimental devices such as pipe flow, overflow and injection are supported, and compared with a single closed series experimental module, the extensible experimental types are increased by two times, and the open type experimental platform comprises a left working table and a right working table; and more water pipes can be led out by using a tee joint to be connected to more experiment modules, so that the maximum parallel experiment number is increased from one group to more than two groups, for example, a flowmeter verification experiment and a pipeline resistance experiment are carried out at the same time.

Description

Technical Field

[0001] This utility model relates to the field of experimental doctrine technology, specifically to an open experimental platform for fluid mechanics. Background Technology

[0002] Experimental doctrine refers to the use of instruments and equipment to induce changes in experimental objects under artificially controlled conditions, and to acquire knowledge and develop abilities through observation, measurement and analysis. Existing experimental doctrines include the study of fluid mechanics, which is mainly divided into the study of fluids such as water and wind.

[0003] Existing water flow experimental devices generally adopt a closed-loop series water circuit design. Their core architecture is as follows: Piping system: The main water supply pipe and experimental modules (such as orifice flow meters and venturi tubes) are rigidly connected via flanges, forming a unidirectional closed loop. Module integration: The experimental modules are embedded in the main pipeline, using cast iron / stainless steel pipes of uniform diameter, with on / off control via gate valves. Flow mode limitations: Only fully enclosed flow experiments within the pipe (such as laminar / turbulent flow observation and friction loss measurement) are supported; open flow channels (such as open channel flow and jet impact) or gas-liquid two-phase flow experiments are not compatible. Current constant pressure head implementation schemes mainly rely on gravitational potential energy. Their technical characteristics include: an open rectangular water tank with a top overflow trough maintaining a fixed water level; the experimental module inlet is located on the side wall of the water tank, forming static pressure through vertical height difference. Pressure regulation methods are divided into: mechanical: step-type head adjustment is achieved by raising the water tank base or replacing the water tank with one of different heights; hydraulic: a pressure reducing valve is installed at the inlet of the experimental section, but pressure fluctuations occur after the valve.

[0004] This results in the inability to achieve parallel, branch, or multi-loop configurations in series water circuits. The closed design excludes non-pipe flow experiments, such as the inability to install free surface tanks or ejectors. Traditional designs prioritize reducing leakage risks, sacrificing system flexibility. Their constant pressure head cannot be continuously adjusted, and the step adjustment accuracy is low, which cannot meet the requirements of micro-pressure difference experiments.

[0005] Therefore, it is necessary to propose an open experimental platform for fluid mechanics. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides an open experimental platform for fluid mechanics, which has the advantages of using open ports to enhance the scalability of experimental modules and enabling multiple experiments to be conducted in parallel, thus solving the problems mentioned in the background technology.

[0007] This utility model provides the following technical solution: an open experimental platform for fluid mechanics, comprising a frame, a constant pressure water tank, and a water storage tank:

[0008] A water storage tank is installed at the bottom of the frame, and a constant pressure water tank is installed inside the frame.

[0009] The water storage tank is equipped with a water pump. The output end of the water pump is connected to a water supply pipe, and the other end of the water supply pipe extends into the interior of the constant pressure water tank. The water storage tank is also equipped with an overflow pipe, the other end of which extends into the interior of the constant pressure water tank. The constant pressure water tank is also equipped with a flow stabilizing plate and an overflow plate, which is located on one side of the flow stabilizing plate. An orifice plate is installed on the upper surface of the water storage tank. Two sets of pipes are installed on the lower surface of the constant pressure water tank, and flow meters are installed on both sets of pipes. The other end of each set of pipes has a water outlet.

[0010] Preferably, sliding columns are fixedly connected at the four corners of the frame, fixed sliders are slidably connected inside the sliding columns, and lifting worktables are fixedly connected to the outside of the fixed sliders.

[0011] Preferably, the upper surface of the lifting worktable is equipped with a base plate, a vertical plate is fixedly connected to one side of the upper surface of the base plate, a bracket is fixedly connected to the middle position and the other side of the upper surface of the base plate, an impulse turbine is installed on the side bracket, a coupling is installed on the middle bracket, and one end of the coupling is connected to the output shaft of the impulse turbine.

[0012] Preferably, bearing seats are fixedly connected to the four corners of the side of the upright plate, and a lead screw is rotatably connected inside every two sets of bearing seats. A nut slider is threadedly connected to the outer surface of the lead screw, and a rope is installed inside the nut slider. The rope is sleeved with a pulley, and the other end of the coupling is fixedly connected to the middle of one side of the pulley.

[0013] Preferably, a knob is fixedly connected to the upper end of the lead screw, and the side of the nut slider is in contact with the side of the upright plate.

[0014] Preferably, an inlet pipe is fixedly connected to one side of the impulse turbine, and an outlet is sleeved at the other end of the inlet pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This open-type fluid dynamics experimental platform, through the combination of open ports and porous experimental surfaces, supports more than three types of experimental devices such as pipe flow, overflow, and jet. Compared with a single closed series experimental module, the number of scalable experimental types is doubled. The device includes two workbenches on the left and right, and more water pipes can be led out using tees to connect to more experimental modules, increasing the maximum number of parallel experiments from one set to more than two sets, such as simultaneously conducting flow meter calibration experiments and pipe resistance experiments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0019] Figure 2 This is a schematic diagram of the experimental module structure of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Flow stabilizer plate; 2. Overflow plate; 3. Constant pressure water tank; 4. Frame; 5. Sliding column; 6. Lifting worktable; 7. Water storage tank; 8. Overflow pipe; 9. Water pump; 10. Water supply pipe; 11. Fixed slider; 12. Water outlet; 13. Flow meter; 14. Orifice plate; 1501. Knob; 1502. Force gauge; 1503. Rope; 1504. Pulley; 1505. Coupling; 1506. Impulse turbine; 1507. Support; 1508. Base plate; 1509. Vertical plate; 1510. Bearing seat; 1511. Lead screw; 1512. Nut slider; 1513. Water inlet pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please see Figure 1 and Figure 2 The open-type experimental platform for fluid mechanics includes frame 4, constant pressure water tank 3, and water storage tank 7.

[0025] A water storage tank 7 is installed at the bottom of the frame 4, and a constant pressure water tank 3 is installed inside the frame 4.

[0026] The water storage tank 7 is equipped with a water pump 9. The output end of the water pump 9 is connected to a water supply pipe 10. The other end of the water supply pipe 10 extends into the interior of the constant pressure water tank 3. The water storage tank 7 is equipped with an overflow pipe 8. The other end of the overflow pipe 8 extends into the interior of the constant pressure water tank 3. The constant pressure water tank 3 is equipped with a flow stabilizing plate 1 and an overflow plate 2. The overflow plate 2 is located on one side of the flow stabilizing plate 1. The upper surface of the interior of the water storage tank 7 is equipped with an orifice plate 14. The lower surface of the constant pressure water tank 3 is equipped with two sets of pipes, and flow meters 13 are installed on the two sets of pipes. The other end of the two sets of pipes is equipped with an outlet 12.

[0027] The water storage tank 7 is made of plexiglass and has a volume of 1500L. The perforated plate 14 on it is used to collect the overflow water into the water storage tank 7. The water pump 9 is a corrosion-resistant submersible pump, and the flow rate and head meet the experimental water supply requirements of the 2.4m high constant pressure overflow water supply tank. The water supply pipe 10 is a DN50 plastic water pipe. The overflow pipe 8 is a DN50 plastic water pipe, with the inlet end located at the bottom of the constant pressure water tank 3 and the outlet end extending below the liquid surface of the water storage tank 7 to avoid water flow impact and air bubbles.

[0028] The constant pressure water tank 3 has a rectangular structure with a volume of 300L and is made of transparent acrylic sheet. The flow stabilizing plate 1 is vertically installed inside the constant pressure water tank 3 and is composed of porous honeycomb panels arranged in an alternating pattern to disperse the water flow and reduce the intensity of turbulence. The overflow plate 2 is vertically fixed inside the constant pressure water tank 3 to maintain a constant liquid level with an accuracy of ±1mm. The flow meter 13 is an electromagnetic flow meter with a range of 0.1~1L / s.

[0029] The outlet 12 adopts a quick-connect flange structure and is connected to the experimental module through a flexible hose or rigid pipe.

[0030] As a preferred technical solution of this utility model, sliding columns 5 are fixedly connected at the four corners of the frame 4, and fixed sliders 11 are slidably connected inside the sliding columns 5, and lifting worktables 6 are fixedly connected to the outside of the fixed sliders 11.

[0031] The lifting worktable 6 has a perforated tabletop and is fixed to the fixed slider 11 by bolts. It is detachable and its height can be adjusted up and down along the sliding column 5 as the fixed slider 11 is used to place the experimental module. The sliding column 5 is symmetrically distributed at the four corners of the frame 4 and is chrome-plated to reduce the coefficient of friction. The sliding column 5 cooperates with the fixed table slider 11.

[0032] Furthermore, during operation, water pump 9 is turned on, and water in water storage tank 7 is injected into constant pressure water tank 3 through water supply pipe 10. Excess water flows back through overflow pipe 8. During the experimental stage, the gate valve opening is adjusted, and the flow rate is monitored by flow meter 13. Water flows through outlet 12 to the experimental module, and overflow water returns to water storage tank 7 through orifice plate 14. During the final stage, water pump 9 is turned off, and the constant pressure water tank 3 is emptied of residual water.

[0033] As a preferred embodiment of this utility model, a base plate 1508 is installed on the upper surface of the lifting worktable 6. A vertical plate 1509 is fixedly connected to one side of the upper surface of the base plate 1508. A bracket 1507 is fixedly connected to the middle and the other side of the upper surface of the base plate 1508. An impulse turbine 1506 is installed on the side bracket 1507, and a coupling 1505 is installed on the middle bracket 1507. One end of the coupling 1505 is connected to the output shaft of the impulse turbine 1506. Bearing seats 1510 are fixedly connected to the four corners of the side of the vertical plate 1509. Every two sets of bearing seats 1510 The internal rotating connection is a lead screw 1511, and the outer surface of the lead screw 1511 is threaded with a nut slider 1512. A rope 1503 is installed inside the nut slider 1512, and the rope 1503 is sleeved with a pulley 1504. The other end of the coupling 1505 is fixedly connected to the middle of one side of the pulley 1504. A knob 1501 is fixedly connected to the upper end of the lead screw 1511. The side of the nut slider 1512 is in contact with the side of the vertical plate 1509. An inlet pipe 1513 is fixedly connected to one side of the impact turbine 1506, and the other end of the inlet pipe 1513 is sleeved with an outlet 12.

[0034] The water flow from outlet 12 impacts the impulse turbine 1506, causing the pulley 1504 to rotate. The impulse turbine 1506 drives the pulley 1504 to rotate via a shaft and coupling 1505. The rope 1503 is looped on the pulley 1504, and its two ends are connected to the force gauge 1502. The friction between the rope 1503 and the pulley 1504 causes a force difference at both ends of the rope 1503, which is measured by the force gauge 1502. The force gauge 1502 is fixed on the nut slider 1512 and can move up and down with the rotation of the lead screw 1511, thereby tightening or loosening the rope 1503.

[0035] This device, through the open outlet 12 and the multi-hole workbench, adopts quick-connect fittings for water pipes and small holes on the lifting workbench 6 to achieve compatibility expansion: it supports three types of experimental devices: pipe flow, overflow, and jet, increasing the types of experimental modules that can be performed; the lifting workbench, composed of sliding column 5, fixed slider, and orifice plate 14, can achieve: free adjustment of the experimental platform height and free adjustment of the pressure head from the constant pressure water tank 3 to the experimental platform; through the combination of impact turbine 1506 and force gauge 1502, it can measure data such as the output power and speed-torque of the micro turbine; the braking friction of the force gauge 1502 can be adjusted by moving the nut slider 1512 up and down to tighten or loosen the rope 1503.

[0036] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An open experimental platform for fluid mechanics, comprising a frame (4), a constant pressure water tank (3), and a water storage tank (7), characterized in that: A water storage tank (7) is installed at the bottom of the frame (4), and a constant pressure water tank (3) is installed inside the frame (4); The water storage tank (7) is equipped with a water pump (9), and the output end of the water pump (9) is equipped with a water supply pipe (10). The other end of the water supply pipe (10) extends into the interior of the constant pressure water tank (3). The water storage tank (7) is equipped with an overflow pipe (8), and the other end of the overflow pipe (8) extends into the interior of the constant pressure water tank (3). The constant pressure water tank (3) is equipped with a flow stabilizing plate (1), and the constant pressure water tank (3) is equipped with an overflow plate (2). The overflow plate (2) is located on one side of the flow stabilizing plate (1). The upper surface of the interior of the water storage tank (7) is equipped with a perforated plate (14). The lower surface of the constant pressure water tank (3) is equipped with two sets of pipes, and flow meters (13) are installed on the two sets of pipes. The other end of the two sets of pipes is equipped with a water outlet (12).

2. The hydrodynamic open experimental platform according to claim 1, characterized in that: Sliding columns (5) are fixedly connected at the four corners of the frame (4). A fixed slider (11) is slidably connected inside the sliding column (5). A lifting worktable (6) is fixedly connected to the outside of the fixed slider (11).

3. The hydrodynamic open experimental platform according to claim 2, characterized in that: The upper surface of the lifting worktable (6) is equipped with a base plate (1508). A vertical plate (1509) is fixedly connected to one side of the upper surface of the base plate (1508). A bracket (1507) is fixedly connected to the middle position and the other side of the upper surface of the base plate (1508). An impulse turbine (1506) is installed on the side bracket (1507). A coupling (1505) is installed on the middle bracket (1507). One end of the coupling (1505) is connected to the output shaft of the impulse turbine (1506).

4. The hydrodynamic open experimental platform according to claim 3, characterized in that: Bearing seats (1510) are fixedly connected to the four corners of the side of the upright plate (1509). A lead screw (1511) is rotatably connected inside every two sets of bearing seats (1510). A nut slider (1512) is threadedly connected to the outer surface of the lead screw (1511). A rope (1503) is installed inside the nut slider (1512). A pulley (1504) is sleeved on the rope (1503). The other end of the coupling (1505) is fixedly connected to the middle of one side of the pulley (1504).

5. The hydrodynamic open experimental platform according to claim 4, characterized in that: A knob (1501) is fixedly connected to the upper end of the lead screw (1511), and the side of the nut slider (1512) is in contact with the side of the upright plate (1509).

6. The hydrodynamic open experimental platform according to claim 3, wherein: The impulse turbine (1506) is fixedly connected to one side of an inlet pipe (1513), and the other end of the inlet pipe (1513) is fitted with an outlet (12).

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