Experimental device for simulating flow velocity of river channel

Abstract

The invention discloses an experimental device for simulating the flow velocity of a river channel. The experimental device comprises a water tank, a circulating water pump, a motor bracket, a simulation winch, a simulation flow velocity meter, a signal transmitting box and a signal receiving device, the circulating water pump is arranged on the bottom wall in the water tank; the motor support is detachably connected to the upper end of the water tank. The simulation winch is arranged on the motor bracket; the simulation current meter comprises a waterproof motor; the driving end of the simulation winch is connected with the waterproof motor; an eccentric wheel is arranged at the output end of the waterproof motor; a microswitch corresponding to the eccentric wheel is arranged on one side of the waterproof motor; the signal transmitting box is placed in the water tank; a signal transmitting module is arranged in the signal transmitting box; the signal transmitting module is electrically connected with the microswitch through the control circuit; the signal receiving device is in signal connection with the signal transmitting module. According to the experimental device, the principle of flow testing is visually and clearly displayed, and the problem that in the prior art, the teaching demonstration effect is poor is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of river flow velocity simulation experiments, and more specifically to an experimental device for simulating river flow velocity. Background Art

[0002] Engineering hydrology is a discipline that studies hydrological measurements, hydrological calculations, hydrological forecasts, etc., and provides hydrological data for the planning, design, construction, and management of water conservancy and hydropower projects and other water-related projects. During the teaching process of engineering hydrology, experimental devices are often needed to demonstrate the operation process of principles. Currently, for the demonstration of the principles of hydrological information collection and processing, due to the volume and weight limitations of flow measurement devices, there is no suitable experimental device to demonstrate the principles of flow measurement. Generally, knowledge points in the flow observation chapter are introduced through teachers' blackboard writing, slide shows, etc. The current meter method is the mainstream method for flow observation, but the operation process of the current meter method cannot be vividly demonstrated. Therefore, how to provide an experimental device capable of simulating river flow velocity is one of the technical problems urgently to be solved in this field. Summary of the Invention

[0003] In view of this, the present invention provides an experimental device for simulating river flow velocity, and the purpose is to solve the problems existing in the prior art.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An experimental device for simulating river flow velocity, comprising:

[0006] A water tank;

[0007] A circulating water pump; the circulating water pump is arranged on the inner bottom wall of the water tank;

[0008] A motor bracket; the motor bracket is detachably connected to the upper end of the water tank;

[0009] A simulated winch; the simulated winch is arranged on the motor bracket;

[0010] A simulated current meter; the simulated current meter includes a waterproof motor; the driving end of the simulated winch is connected to the waterproof motor; an eccentric wheel is arranged at the output end of the waterproof motor; a microswitch corresponding to the eccentric wheel is arranged on one side of the waterproof motor;

[0011] A signal transmitting box; the signal transmitting box is placed inside the water tank; a signal transmitting module is arranged inside the signal transmitting box; the signal transmitting module is electrically connected to the microswitch through a control circuit;

[0012] A signal receiving device; the signal receiving device is signal-connected to the signal transmitting module.

[0013] Preferably, the circulating water pump is provided with a plurality of water inlets, water outlets and a speed control button for adjusting the operating speed of the circulating water pump.

[0014] Preferably, the simulation winch includes a DC reduction motor; a driven shaft is provided at the output end of the DC reduction motor; a metal rope is wound around the driven shaft; a metal hook is provided at the free end of the metal rope; a metal ring adapted to the metal hook is provided at the upper end of the waterproof motor.

[0015] Preferably, the motor bracket includes a first aluminum profile and two second aluminum profiles; the two second aluminum profiles are symmetrically arranged on the left and right sides at the bottom end of the first aluminum profile; the second aluminum profile is connected to the first aluminum profile through an angle code; the second aluminum profile is vertically arranged with the first aluminum profile; the second aluminum profile is connected to the outer side surface of the upper end of the water tank through bolts.

[0016] Preferably, a motor fixing bracket is provided on the first aluminum profile; the DC reduction motor is fixedly connected to the motor fixing bracket through bolts.

[0017] Preferably, the signal transmitting module is connected to the metal ring through a signal antenna.

[0018] Preferably, a battery is provided inside the signal transmitting box; the battery is electrically connected to the signal transmitting module.

[0019] Preferably, a wireless charging coil for charging the battery is provided inside the signal transmitting box.

[0020] Preferably, a counterweight is provided inside the signal transmitting box.

[0021] Preferably, the signal receiving device includes a signal receiving module and a computer terminal monitoring software; the signal receiving module is used to receive the electrical signal transmitted by the signal transmitting module; the computer terminal monitoring software is used to receive the electrical signal of the signal receiving module and present it on the monitoring software interface.

[0022] The present invention has achieved the following technical effects compared with the prior art:

[0023] 1) By controlling the waterproof motor to periodically toggle the micro switch to generate a flow velocity signal, the present invention solves the drawback that the blades of the traditional propeller-type flow velocity meter are not easy to rotate in slow water flow, and thus cannot transmit the flow velocity signal.

[0024] 2) In the present invention, the DC reduction motor can control the analog current meter to stay at different measuring points of the sounding vertical line, simulate the measured current velocities at different points, and obtain the average current velocity of the sounding vertical line through relevant flow calculation formulas. By changing the position of the sounding vertical line, the flow rate of the simulated river channel section can be obtained using relevant flow calculation formulas;

[0025] 3) During the process of transmitting the current velocity signal in the present invention, by connecting the signal antenna to the metal ring, metal hook, and metal rope, the current velocity signal is transmitted out of the water through the metal rope, avoiding the problem that the metal suspension cable of the traditional propeller current meter and the signal wire are prone to entanglement during retraction and extension, and ensuring the stability of the device operation;

[0026] 4) During the process of receiving and processing the current velocity signal in the present invention, the computer terminal monitoring software can be set not to record several electrical signals transmitted after the signal transmission module starts working, realizing the unstable state of the current meter during water entry in the actual flow measurement process;

[0027] 5) The water tank of the present invention is made of acrylic material with good light transmittance, facilitating the observation of the operation of the device inside the tank. At the same time, the acrylic material has good processing performance, facilitating the fixation and installation of the circulation water pump and the motor bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view of an experimental device for simulating river channel current velocity of the present invention;

[0029] Figure 2 is a front view of an experimental device for simulating river channel current velocity of the present invention;

[0030] Figure 3 is a top view of an experimental device for simulating river channel current velocity of the present invention;

[0031] Figure 4 is a schematic structural diagram of the circulation water pump;

[0032] Figure 5 is a schematic structural diagram of the motor bracket;

[0033] Figure 6 is a schematic structural diagram of the simulated winch;

[0034] Figure 7 is a schematic structural diagram of the analog current meter;

[0035] Figure 8 is a schematic diagram of the cooperation between the signal transmission box and the analog current meter;

[0036] Figure 9 is a sectional view of the internal structure of the signal transmission box;

[0037] Figure 10Schematic diagram of the signal receiving module.

[0038] In the figure: 100, water tank; 200, circulation water pump; 201, water inlet; 202, water outlet; 203, speed control button; 300, motor bracket; 301, first aluminum profile; 302, second aluminum profile; 303, corner bracket; 304, motor fixing bracket; 400, DC geared motor; 401, second screw hole; 402, first output shaft; 403, first coupling; 404, driven shaft; 405, metal hook; 406, metal rope; 500, waterproof motor; 501, metal ring; 502, second output shaft; 503, second coupling; 504, eccentric wheel; 505, micro switch; 600, signal transmitting box; 601, mounting block; 602, control circuit; 603, signal antenna; 604, battery; 605, signal transmitting module; 606, counterweight; 700, signal receiving module. Detailed implementation

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment

[0041] Refer to Figure 1-10 As shown, the present invention discloses an experimental device for simulating the flow velocity of a river channel, including:

[0042] Water tank 100;

[0043] Circulation water pump 200; The circulation water pump 200 is arranged on the inner bottom wall of the water tank 100; The circulation water pump 200 is electrically connected to the power supply outside the water tank 100 through an electrical socket.

[0044] Motor bracket 300; The motor bracket 300 is detachably connected to the upper end of the water tank 100;

[0045] Simulated winch; The simulated winch is arranged on the motor bracket 300;

[0046] Simulated current meter; The simulated current meter includes a waterproof motor 500; The driving end of the simulated winch is connected to the waterproof motor 500; The waterproof motor 500 is electrically connected to the power supply outside the water tank through an electrical socket; The output end of the waterproof motor 500 is provided with an eccentric wheel 504; A micro switch 505 corresponding to the eccentric wheel 504 is arranged on one side of the waterproof motor 500.

[0047] Signal transmitter box 600; the signal transmitter box 600 is placed inside the water tank 100; a signal transmitting module 605 is provided inside the signal transmitter box 600; the signal transmitting module 605 is electrically connected to the microswitch 505 through a control circuit 602;

[0048] Signal receiving device; the signal receiving device is signal-connected to the signal transmitting module 605.

[0049] In this embodiment, a plurality of water inlets 201, water outlets 202 and a speed control button 203 for adjusting the operating speed of the circulating water pump 200 are provided on the circulating water pump 200; the plurality of water inlets 201 are provided at the top end of the circulating water pump 200; the water outlet 202 and the speed control button 203 are provided on the side surface of the circulating water pump 200; when in use, the water in the water tank 100 enters the circulating water pump 200 through the water inlet 201, and then the water in the circulating water pump 200 is pumped out through the water outlet 202.

[0050] In this embodiment, the analog winch includes a DC reduction motor 400; a driven shaft 404 is provided at the output end of the DC reduction motor 400; a metal rope 406 is wound around the driven shaft 404; a metal hook 405 is provided at the free end of the metal rope 406; a metal ring 501 adapted to the metal hook 405 is provided at the upper end of the waterproof motor 500.

[0051] In this embodiment, the motor bracket 300 includes a first aluminum profile 301 and two second aluminum profiles 302; the two second aluminum profiles 302 are symmetrically arranged on the left and right sides of the bottom end of the first aluminum profile 301; the second aluminum profile 302 is connected to the first aluminum profile 301 through an angle bracket 303, which is convenient for disassembly; the second aluminum profile 302 is vertically arranged with the first aluminum profile 301; the second aluminum profile 302 is fixedly connected to the outer side surface of the upper end of the water tank 100 through bolts.

[0052] In the above technical solution, the second aluminum profile is connected to the water tank through bolts, and the first aluminum profile and the second aluminum profile are connected through an angle bracket. When the experiment is completed, the motor bracket can be removed and placed in the water tank, which is convenient for handling.

[0053] In this embodiment, a motor fixing frame 304 is provided on the first aluminum profile 301; the DC reduction motor 400 is fixedly connected to the motor fixing frame 304 through bolts.

[0054] In this embodiment, four second screw holes 401 are evenly distributed on one side of the DC reduction motor 400, which is convenient for fixing connection with the motor fixing frame 304.

[0055] In this embodiment, a first output shaft 402 is provided inside the DC reduction motor 400; the first output shaft 402 is connected to the driven shaft 404 through a first coupling 403.

[0056] In this embodiment, a brush is provided on the DC reduction motor 400 for electrical connection with a speed governor outside the water tank; the speed governor controls the torque magnitude and direction of the DC reduction motor 400, so as to control the lifting direction and rate of the metal hook 405.

[0057] In this embodiment, the signal transmission module 605 is connected to the metal ring 501 through the signal antenna 603.

[0058] In this embodiment, a battery 604 is provided inside the signal transmission box 600; the battery 604 is electrically connected to the signal transmission module 605.

[0059] In this embodiment, a wireless charging coil for charging the battery 604 is provided inside the signal transmission box 600.

[0060] In this embodiment, a counterweight 606 is provided inside the signal transmission box 600.

[0061] In this embodiment, a mounting block 601 is provided on the outer side of the upper end of the box body of the signal transmission box 600; a first screw hole is provided on the mounting block 601, which is convenient for the fixed connection between the box body of the signal transmission box 600 and the box cover.

[0062] In this embodiment, the signal receiving device includes a signal receiving module 700 and computer - side monitoring software; the signal receiving module 700 is used to receive the flow velocity signal transmitted by the signal transmission module 605; the computer - side monitoring software is used to receive the electrical signal of the signal receiving module 700 and present it on the monitoring software interface to realize the visualization of the flow velocity signal.

[0063] In this embodiment, a second output shaft 502 is provided inside the waterproof motor 500; the second output shaft 502 is connected to the eccentric wheel 504 through a second coupling 503.

[0064] In this embodiment, the distance between the micro - switch 505 and the axis of the second output shaft 502 is slightly less than the radius of the eccentric wheel 504.

[0065] In this embodiment, the computer - side monitoring software can be set not to record several electrical signals transmitted after the signal transmission module starts to work, realizing the state of unstable flow measurement when the flow velocity meter enters the water during the actual flow measurement simulation.

[0066] In this embodiment, the water tank 100 is made of acrylic material.

[0067] In some other embodiments, the circulation water pump 200, the DC reduction motor 400, and the waterproof motor 500 are all connected to the signal receiving module 700, and the computer - side monitoring software adjusts the rotation speeds of the circulation water pump 200, the DC reduction motor 400, and the waterproof motor 500 through the signal receiving module 700.

[0068] In some other embodiments, the signal receiving device is built-in with a three-way motor speed control circuit, which can simultaneously control the operating speeds of the circulating water pump, the analog flow velocity meter, and the analog winch.

[0069] Working principle of the experimental device of the present invention:

[0070] First step, debug the signal transmitting device. Install the battery 604 in the signal transmitting box 600, electrically connect it to the signal transmitting module 605, then install the screws in the screw holes to complete the waterproof encapsulation, and connect the signal antenna 603 to the metal ring 501 on the waterproof motor 500.

[0071] Second step, debug the signal receiving device. Connect the signal receiving module 700 to the computer and turn on the monitoring software on the computer side.

[0072] Third step, simulate the water flow condition of the river channel. Add a certain amount of water into the water tank 100, press the speed control button 203 to start the circulating water pump 200. The speed control switches at different gears can change the water pumping rate of the circulating water pump 200 to simulate the water flow conditions of river channels, ditches, etc.

[0073] Fourth step, start the analog winch. Fix the metal hook 405 to the metal ring 501 on the analog flow velocity meter. Connect the speed controller to the power supply, start the DC reduction motor 400 and adjust the speed, so that the first output shaft 402 transmits the torque to the driven shaft 404 through the first coupling 403, and then the metal rope 406 on the driven shaft 404 slowly descends to release the analog flow velocity meter into the water.

[0074] Fifth step, start the analog flow velocity meter. After the analog flow velocity meter is completely in the water, turn off the speed controller and start the waterproof motor 500, so that the eccentric wheel 504 rotates periodically around the axis of the second output shaft 502 through the second coupling 503, and then the eccentric wheel 504 periodically toggles the micro switch 505 to transmit an electrical signal to the signal transmitting module 605.

[0075] Sixth step, process the flow velocity signal. Since the signal antenna 603 is connected to the metal ring 501, the metal hook 405 and the metal rope 406 are connected, and one end of the metal rope 406 is above the water, the signal transmitting module 605 can transmit the electrical signal generated by the analog flow velocity meter out of the water through the signal antenna 603, which is received by the signal receiving device and processed by the computer side. According to the number of electrical signals transmitted by the analog flow velocity meter and the flow measurement duration, the flow velocity magnitude at this point can be obtained through formula calculation.

[0076] Step 7: End the display. After the display part ends, start the DC reduction motor 400 and adjust the speed so that the first output shaft 402 transmits torque to the driven shaft 404 through the first coupling 403, causing the metal rope 406 on the driven shaft 404 to slowly rise and suspend the simulated current meter out of the water; then connect a rubber hose at the water outlet 202 of the circulating water pump 200, with the other end of the rubber hose leading outside the water tank 100. Start the circulating water pump 200 to quickly and conveniently drain the water in the water tank 100: after the water is drained, open the signal transmitter box 600 and remove the battery 604 for the next experiment.

[0077] As described above, it is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An experimental device for simulating the flow velocity of a river channel, characterized in that, Comprising: Water tank (100); Circulating water pump (200); the circulating water pump (200) is arranged on the inner bottom wall of the water tank (100); Motor bracket (300); the motor bracket (300) is detachably connected to the upper end of the water tank (100); Simulated winch; the simulated winch is arranged on the motor bracket (300); Simulated current meter; the simulated current meter includes a waterproof motor (500); the driving end of the simulated winch is connected to the waterproof motor (500); an eccentric wheel (504) is arranged at the output end of the waterproof motor (500); a microswitch (505) corresponding to the eccentric wheel (504) is arranged on one side of the waterproof motor (500); Signal transmitting box (600); the signal transmitting box (600) is placed inside the water tank (100); a signal transmitting module (605) is arranged inside the signal transmitting box (600); the signal transmitting module (605) is electrically connected to the microswitch (505) through a control circuit (602); Signal receiving device; the signal receiving device is signal-connected to the signal transmitting module (605).

2. The experimental device for simulating river channel flow velocity according to claim 1, characterized in that, A plurality of water inlets (201), water outlets (202) and a speed regulation button (203) for adjusting the working speed of the circulating water pump (200) are arranged on the circulating water pump (200).

3. An experimental device for simulating river channel flow velocity according to claim 1, characterized in that, The simulated winch includes a DC reduction motor (400); a driven shaft (404) is arranged at the output end of the DC reduction motor (400); a metal rope (406) is wound around the driven shaft (404); a metal hook (405) is arranged at the free end of the metal rope (406); a metal ring (501) adapted to the metal hook (405) is arranged at the upper end of the waterproof motor (500).

4. An experimental device for simulating the flow velocity of a river channel according to claim 3, characterized in that, The motor bracket (300) includes a first aluminum profile (301) and two second aluminum profiles (302); the two second aluminum profiles (302) are symmetrically arranged on the left and right sides of the bottom end of the first aluminum profile (301); the second aluminum profile (302) is connected to the first aluminum profile (301) through an angle code (303); the second aluminum profile (302) is vertically arranged with the first aluminum profile (301); the second aluminum profile (302) is connected to the outer side surface of the upper end of the water tank (100) through bolts.

5. An experimental device for simulating river channel flow velocity according to claim 4, characterized in that, A motor fixing frame (304) is arranged on the first aluminum profile (301); the DC reduction motor (400) is fixedly connected to the motor fixing frame (304) through bolts.

6. The experimental device for simulating the flow velocity of a river channel according to claim 3, characterized in that, The signal transmitting module (605) is connected to the metal ring (501) through a signal antenna (603).

7. An experimental device for simulating river channel flow velocity according to claim 1, characterized in that, A battery (604) is arranged inside the signal transmitting box (600); the battery (604) is electrically connected to the signal transmitting module (605).

8. An experimental device for simulating river channel flow velocity according to claim 7, characterized in that, A wireless charging coil for charging the battery (604) is arranged inside the signal transmitting box (600).

9. An experimental device for simulating river channel flow velocity according to claim 1, characterized in that, A counterweight block (606) is arranged inside the signal transmitting box (600).

10. An experimental device for simulating river channel flow velocity according to claim 1, characterized in that, The signal receiving device includes a signal receiving module (700) and computer-side monitoring software; the signal receiving module (700) is configured to receive the electrical signal transmitted by the signal transmitting module (605); the computer-side monitoring software is configured to receive the electrical signal of the signal receiving module (700) and present it on the monitoring software interface.

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