Electrical automation teaching demonstration device

Abstract

The utility model relates to an electrical automation teaching demonstration device which comprises a demonstration frame and a transparent measuring cup, and the demonstration frame is provided with a transparent stirring cup, a frequency conversion stirring mechanism, a liquid discharging mechanism, a measuring cup servo rotating mechanism, a measuring cup clamping, lifting and overturning mechanism, a transparent heating cup, a pumping mechanism, a PLC controller, a touch screen and a switching power supply. And a temperature control heating mechanism is mounted on the transparent heating cup. A series of processes of stirring, quantitative discharging, transferring, dumping, heating and pumping of colored liquid are completed through cooperation of a transparent stirring cup, a variable-frequency stirring mechanism, a liquid discharging mechanism, a transparent measuring cup, a measuring cup servo rotating mechanism, a measuring cup clamping, lifting and overturning mechanism, a transparent heating cup, a pumping mechanism, a PLC, a touch screen, a switching power supply and a temperature control heating mechanism. Various components in the automation system are arranged and combined together to demonstrate the process that the components are matched with one another to carry out system working to students, and the students can understand the system working principle through mutual matching of the components.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching equipment field especially, it is a kind of electrical automation teaching demonstration device. BACKGROUND

[0002] Electrical automation major is to cultivate senior engineering and technical personnel in the field of motion control, industrial process control, power electronics technology, detection and automation instrument, electronics and computer technology, information processing, management and decision-making, etc. engaged in system analysis, system design, system operation, scientific and technological development and research, etc.

[0003] Electrical automation major teaching needs teaching demonstration device to demonstrate the working process of some components, to improve the understanding ability of students. But the existing teaching demonstration device mostly installs each component needing demonstration on demonstration table, demonstrates certain single component by single switch control or single program control module control, and students are difficult to understand the working principle of cooperation between different components and system working process. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the above problems existing in prior art, provide a kind of electrical automation teaching demonstration device.

[0005] To realize the above technical purpose, reach the above technical effect, the utility model realizes by following technical scheme:

[0006] A kind of electrical automation teaching demonstration device, including demonstration frame placed on ground, the transparent measuring cup for measuring and transporting liquid, the demonstration frame is installed with transparent stirring cup, frequency conversion stirring mechanism, liquid discharge mechanism, measuring cup servo rotation mechanism, measuring cup clamping lifting turnover mechanism, transparent heating cup, pumping mechanism, PLC controller, touch screen, switching power supply, the stirring paddle of frequency conversion stirring mechanism is inserted into transparent stirring cup, the liquid inlet of liquid discharge mechanism is connected with the bottom of one side of transparent stirring cup, the liquid discharge port of liquid discharge mechanism is towards the center of transparent measuring cup rotated to its below, the transparent measuring cup is placed on measuring cup servo rotation mechanism, the transparent heating cup is installed with temperature control heating mechanism, the liquid inlet pipe first end of pumping mechanism is inserted into the bottom of transparent heating cup, the liquid outlet pipe tail end of pumping mechanism is inserted into transparent stirring cup, the PLC controller is connected with frequency conversion stirring mechanism, liquid discharge mechanism, measuring cup servo rotation mechanism, measuring cup clamping lifting turnover mechanism, pumping mechanism, touch screen respectively by cable, the switching power supply is respectively by cable to frequency conversion stirring mechanism, liquid discharge mechanism, measuring cup servo rotation mechanism, measuring cup clamping lifting turnover mechanism, pumping mechanism, PLC controller, touch screen power supply, the temperature control heating mechanism and switching power supply are powered by commercial power.

[0007] The demonstration frame includes a rectangular table, a white vertical plate and a triangular support frame, the triangular support frame is installed at the top end of the table, the white vertical plate is installed at the vertical face end of the triangular support frame, the white vertical plate is perpendicular to the top end of the table, the front face of the white vertical plate is provided with a stirring cup rack and a heating cup rack, the transparent stirring cup is installed on the stirring cup rack, and the transparent heating cup is installed on the heating cup rack.

[0008] The variable frequency stirring mechanism includes a first motor rack, a variable frequency motor, a frequency converter and a stirring paddle, the first motor rack and the frequency converter are respectively installed on the front face of the white vertical plate, the variable frequency motor is installed on the first motor rack, the top of the stirring paddle is connected with the motor shaft of the variable frequency motor through a shaft coupling, and the frequency converter is connected with the PLC controller, the variable frequency motor and the switching power supply through cables.

[0009] The liquid discharge mechanism includes an L-shaped liquid discharge pipe, an electric stop valve and a time relay, the electric stop valve is installed in the middle of the liquid discharge pipe, the liquid inlet of the liquid discharge pipe is connected with one side of the bottom of the transparent stirring cup, the liquid outlet of the liquid discharge pipe is directed to the center of the transparent measuring cup below, the input loop of the time relay is connected with the PLC controller through a cable, and the output loop of the time relay is connected with the electric stop valve and the switching power supply through cables.

[0010] The measuring cup servo rotating mechanism includes a second motor rack, a servo motor, a servo motor driver and a rotating disc, the second motor rack and the servo motor driver are respectively installed on the front face of the white vertical plate, the servo motor is installed on the second motor rack, the rotating disc is installed on the motor shaft of the servo motor, two measuring cup limiting rings arranged in an annular array are fixed at the top end of the rotating disc, the transparent measuring cup is matched with the measuring cup limiting ring through plug-in, and the servo motor driver is connected with the PLC controller, the servo motor and the switching power supply through cables.

[0011] The cup clamping lifting and overturning mechanism comprises a cylinder frame, a telescopic cylinder, a U-shaped adapter frame, a rotary cylinder, a square adapter plate, a clamping jaw cylinder, a first electromagnetic reversing valve, a second electromagnetic reversing valve, a third electromagnetic reversing valve, a first intermediate relay, a second intermediate relay and a third intermediate relay, the cylinder frame, the first electromagnetic reversing valve, the second electromagnetic reversing valve, the third electromagnetic reversing valve, the first intermediate relay, the second intermediate relay and the third intermediate relay are respectively installed on the front face of the white vertical plate, the telescopic cylinder is vertically installed at the bottom end of the cylinder frame, the U-shaped adapter frame is installed at the end of the telescopic rod of the telescopic cylinder, the rotary cylinder is installed in the U-shaped adapter frame, the adapter plate is installed on the rotary disc of the rotary cylinder, the clamping jaw cylinder is installed on the front face of the adapter plate, the telescopic cylinder is communicated with the first electromagnetic reversing valve through a gas conveying pipe, the rotary cylinder is communicated with the second electromagnetic reversing valve through a gas conveying pipe, the clamping jaw cylinder is communicated with the third electromagnetic reversing valve through a gas conveying pipe, the PLC controller is connected with the input circuit of the first intermediate relay, the input circuit of the second intermediate relay and the input circuit of the third intermediate relay through cables respectively, the output circuit of the first intermediate relay, the switching power supply and the first electromagnetic reversing valve are connected by wires to form a closed loop, the output circuit of the second intermediate relay, the switching power supply and the second electromagnetic reversing valve are connected by wires to form a closed loop, and the output circuit of the third intermediate relay, the switching power supply and the third electromagnetic reversing valve are connected by wires to form a closed loop.

[0012] Two groups of telescopic guide rods are installed between the cylinder frame and the U-shaped adapter frame.

[0013] The pumping mechanism comprises a third motor frame, a micro water pump, a liquid inlet pipe, a liquid outlet pipe, a fourth intermediate relay and a liquid level sensor, the third motor frame and the fourth intermediate relay are respectively installed on the front face of the white vertical plate, the micro water pump is installed on the third motor frame, the tail end of the liquid inlet pipe is connected with the water inlet nozzle of the micro water pump, the head end of the liquid outlet pipe is connected with the water outlet nozzle of the micro water pump, the liquid level sensor is installed on the transparent heating cup, the liquid level sensor is connected with the PLC controller through a cable, the input circuit of the fourth intermediate relay is connected with the PLC controller through a cable, and the output circuit of the fourth intermediate relay, the micro water pump and the switching power supply are connected by wires to form a closed loop.

[0014] The temperature control heating mechanism comprises a temperature relay and an electric heating rod, the temperature relay is installed on one side of the transparent heating cup, and the electric heating rod is vertically installed in the transparent heating cup, the output circuit of the temperature relay is connected with the electric heating rod and the commercial power by wires to form a closed loop.

[0015] The transparent stirring cup and the transparent heating cup are both filled with colored liquid.

[0016] The electric automation teaching demonstration device has the advantages that a series of processes of stirring, quantitative discharging, transferring, pouring, heating and pumping of the colored liquid are completed by cooperation of the transparent stirring cup, the frequency conversion stirring mechanism, the liquid discharging mechanism, the transparent measuring cup, the measuring cup servo rotating mechanism, the measuring cup clamping lifting and overturning mechanism, the transparent heating cup, the pumping mechanism, the PLC controller, the touch screen, the switching power supply and the temperature control heating mechanism, a plurality of components in the automatic system are arranged and combined together to demonstrate the process of mutual cooperation of each component for system work to students, and the process is helpful for the students to understand the system work principle of mutual cooperation of each component. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0018] Figure 1 is a perspective structural schematic view of a first visual angle of the electric automation teaching demonstration device in the present application;

[0019] Figure 2 is a perspective structural schematic view of a second visual angle of the electric automation teaching demonstration device in the present application;

[0020] Figure 3 is a plane structural schematic view of a front view of the electric automation teaching demonstration device in the present application;

[0021] Figure 4 is a perspective structural schematic view of the demonstration frame in the present application;

[0022] Figure 5 is a structural schematic view of the frequency conversion stirring mechanism in the present application;

[0023] Figure 6 is a structural schematic view of the combination of the liquid discharging mechanism and the transparent stirring cup in the present application;

[0024] Figure 7 is a structural schematic view of the combination of the measuring cup servo rotating mechanism and the transparent measuring cup in the present application;

[0025] Figure 8 is a structural schematic view of the measuring cup clamping lifting and overturning mechanism in the present application;

[0026] Figure 9 is a structural schematic view of the combination of the pumping mechanism, the transparent heating cup and the temperature control heating mechanism in the present application;

[0027] Figure 10 is a structural schematic view of the combination of the transparent heating cup and the temperature control heating mechanism in the present application;

[0028] Explanation of the numbering in the diagram: Demonstration frame 1, Table 101, White upright board 102, Triangular support frame 103, Stirring cup holder 104, Heating cup holder 105, Transparent stirring cup 2, Variable frequency stirring mechanism 3, First motor frame 301, Variable frequency motor 302, Frequency converter 303, Stirring paddle 304, Drainage mechanism 4, Drainage pipe 401, Electric shut-off valve 402, Time relay 403, Measuring cup servo rotation mechanism 5, Second motor frame 501, Servo motor 502, Servo motor driver 503, Rotary disk 504, Measuring cup limit ring 505, Measuring cup clamping, lifting and flipping mechanism 6, Cylinder frame 601, Telescopic cylinder 602, U-shaped adapter frame 603, Rotary... Rotary cylinder 604, adapter plate 605, gripper cylinder 606, first electromagnetic reversing valve 607, second electromagnetic reversing valve 608, third electromagnetic reversing valve 609, first intermediate relay 6010, second intermediate relay 6011, third intermediate relay 6012, telescopic guide rod 6013, transparent heating cup 7, pumping mechanism 8, third motor frame 801, micro water pump 802, inlet pipe 803, outlet pipe 804, fourth intermediate relay 805, liquid level sensor 806, PLC controller 9, touch screen 10, switching power supply 11, transparent measuring cup 12, temperature-controlled heating mechanism 13, temperature relay 1301, electric heating rod 1302. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 3 As shown, an electrical automation teaching demonstration device includes a demonstration frame 1 placed on the ground, a transparent measuring cup 12 for measuring and transferring liquids, a transparent stirring cup 2, a frequency conversion stirring mechanism 3, a liquid drainage mechanism 4, a measuring cup servo rotation mechanism 5, a measuring cup clamping lifting and flipping mechanism 6, a transparent heating cup 7, a pumping mechanism 8, a PLC controller 9, a touch screen 10, and a switching power supply 11. The PLC controller 9 is connected to the frequency conversion stirring mechanism 3, the liquid drainage mechanism 4, the measuring cup servo rotation mechanism 5, the measuring cup clamping lifting and flipping mechanism 6, the pumping mechanism 8, and the touch screen 10 via cables. The switching power supply 11 supplies power to the frequency conversion stirring mechanism 3, the liquid drainage mechanism 4, the measuring cup servo rotation mechanism 5, the measuring cup clamping lifting and flipping mechanism 6, the pumping mechanism 8, the PLC controller 9, and the touch screen 10 via cables. The temperature control heating mechanism 13 and the switching power supply 11 are powered by mains electricity.

[0031] like Figure 4As shown, the demonstration frame 1 includes a rectangular table 101, a white upright plate 102, and a triangular support frame 103. The triangular support frame 103 is installed on the top of the table 101, and the white upright plate 102 is installed on the vertical end of the triangular support frame 103. The white upright plate 102 is perpendicular to the top of the table 101. A mixing cup holder 104 and a heating cup holder 105 are installed on the front of the white upright plate 102. A transparent mixing cup 2 is installed on the mixing cup holder 104, and a transparent heating cup 7 is installed on the heating cup holder 105.

[0032] Both the transparent stirring cup 2 and the transparent heating cup 7 contain colored liquids.

[0033] like Figure 5 As shown, the variable frequency stirring mechanism 3 includes a first motor frame 301, a variable frequency motor 302, a frequency converter 303, and a stirring paddle 304. The first motor frame 301 and the frequency converter 303 are respectively installed on the front of the white vertical plate 102. The variable frequency motor 302 is installed on the first motor frame 301. The top of the stirring paddle 304 is connected to the motor shaft of the variable frequency motor 302 through a coupling. The frequency converter 303 is connected to the PLC controller 9, the variable frequency motor, and the switching power supply 11 through cables. The stirring paddle of the variable frequency stirring mechanism 3 extends into the transparent stirring cup 2.

[0034] The PLC controller sends the variable frequency motor operating signal to the frequency converter, which directly controls the speed of the variable frequency motor. By observing the rotation speed of the stirring paddle in the colored liquid, the change in the speed of the variable frequency motor can be intuitively felt.

[0035] like Figure 6 As shown, the inlet of the draining mechanism 4 is connected to the bottom of one side of the transparent stirring cup 2, and the drain outlet of the draining mechanism 4 faces the center of the transparent measuring cup 12 below it. Specifically, the draining mechanism 4 includes an L-shaped drain pipe 401, an electric shut-off valve 402, and a time relay 403. The electric shut-off valve 402 is installed in the middle of the drain pipe 401. The inlet of the drain pipe 401 is connected to the bottom of one side of the transparent stirring cup 2, and the drain outlet of the drain pipe 401 faces the center of the transparent measuring cup 12 below it. The input circuit of the time relay 403 is connected to the PLC controller 9 via a cable, and the output circuit of the time relay 403 is connected to the electric shut-off valve 402 and the switching power supply 11 via a cable.

[0036] The PLC controller sends an opening signal to the time relay for the electric shut-off valve. The time relay controls the electric shut-off valve to open, allowing the colored liquid in the transparent stirring cup to drain into the transparent measuring cup through the drain pipe. After a set delay, the time relay controls the electric shut-off valve to close, thus stopping the discharge of the colored liquid from the transparent stirring cup into the transparent measuring cup.

[0037] like Figure 7As shown, the transparent measuring cup 12 is placed on the measuring cup servo rotating mechanism 5, and the measuring cup clamping lifting and overturning mechanism 6 is located above the measuring cup servo rotating mechanism 5 and the transparent heating cup 7. Specifically, the measuring cup servo rotating mechanism 5 comprises a second motor frame 501, a servo motor 502, a servo motor driver 503, and a rotating disc 504. The second motor frame 501 and the servo motor driver 503 are respectively installed on the front face of the white vertical plate 102, the servo motor 502 is installed on the second motor frame 501, the rotating disc 504 is installed on the motor shaft of the servo motor 502, and the top end of the rotating disc 504 is fixedly connected with two measuring cup limiting rings 505 arranged in a ring array. The transparent measuring cup 12 is plug-inserted with the measuring cup limiting rings 505. The servo motor driver 503 is connected with the PLC controller 9, the servo motor 502, and the switching power supply 11 through cables.

[0038] The PLC controller sends a servo motor working signal to the servo motor driver, the servo motor driver directly controls the servo motor to work, drives the rotating disc to rotate, so that the transparent measuring cup rotates and changes position between the position below the liquid discharge pipe and the position above the transparent heating cup, so that the empty measuring cup rotates to the position below the liquid discharge pipe and the transparent measuring cup containing colored liquid rotates to the position above the transparent heating cup.

[0039] As shown in FIG. 6, the transparent measuring cup 12 is placed on the measuring cup servo rotating mechanism 5, and the measuring cup clamping lifting and overturning mechanism 6 is located above the measuring cup servo rotating mechanism 5 and the transparent heating cup 7. Figure 8As shown, the measuring cup clamping and lifting and overturning mechanism 6 comprises a cylinder frame 601, a telescopic cylinder 602, a U-shaped adapter frame 603, a rotary cylinder 604, a square adapter plate 605, a clamping jaw cylinder 606, a first electromagnetic reversing valve 607, a second electromagnetic reversing valve 608, a third electromagnetic reversing valve 609, a first intermediate relay 6010, a second intermediate relay 6011, a third intermediate relay 6012, the cylinder frame 601, the first electromagnetic reversing valve 607, the second electromagnetic reversing valve 608, the third electromagnetic reversing valve 609, the first intermediate relay 6010, the second intermediate relay 6011, and the third intermediate relay 6012 are respectively installed on the front face of the white vertical plate 102, the telescopic cylinder 602 is vertically installed at the bottom end of the cylinder frame 601, the U-shaped adapter frame 603 is installed at the telescopic rod end of the telescopic cylinder 602, the rotary cylinder 604 is installed in the U-shaped adapter frame 603, the adapter plate 605 is installed on the rotary disc of the rotary cylinder 604, the clamping jaw cylinder 606 is installed on the front face of the adapter plate 605, the telescopic cylinder 602 is communicated with the first electromagnetic reversing valve 607 through a gas conveying pipe, the rotary cylinder 604 is communicated with the second electromagnetic reversing valve 608 through a gas conveying pipe, the clamping jaw cylinder 606 is communicated with the third electromagnetic reversing valve 609 through a gas conveying pipe, the PLC controller 9 is connected with the input circuit of the first intermediate relay 6010, the input circuit of the second intermediate relay 6011, and the input circuit of the third intermediate relay 6012 through cables respectively, the output circuit of the first intermediate relay 6010, the switching power supply 11, and the first electromagnetic reversing valve 607 are connected by wires to form a closed loop, the output circuit of the second intermediate relay 6011, the switching power supply 11, and the second electromagnetic reversing valve 608 are connected by wires to form a closed loop, and the output circuit of the third intermediate relay 6012, the switching power supply 11, and the third electromagnetic reversing valve 609 are connected by wires to form a closed loop. Two sets of telescopic guide rods 6013 are installed between the cylinder frame 601 and the U-shaped adapter frame 603, which improves the stability of the upward and downward movement of the rotary cylinder when the telescopic cylinder moves.

[0040] The telescopic cylinder is extended to move the rotary cylinder and the clamping jaw cylinder downward, so that the transparent measuring cup containing the colored liquid is located between the two clamping jaws of the clamping jaw cylinder, then the clamping jaw cylinder is controlled to retract to clamp the transparent measuring cup, then the telescopic cylinder is retracted to pull out the transparent measuring cup from the limiting ring, then the rotary cylinder is rotated 150 degrees toward the transparent heating cup to make the cup opening of the transparent measuring cup face the transparent heating cup, so that the colored liquid in the transparent measuring cup is poured into the transparent heating cup; after the pouring of the colored liquid is completed, the rotary cylinder is rotated 150 degrees toward the liquid discharge mechanism to make the transparent measuring cup return to the vertical state, then the telescopic cylinder is extended to insert the bottom plate of the transparent measuring cup into the limiting ring, then the clamping jaw cylinder is opened to release the transparent measuring cup, and finally the telescopic cylinder is retracted to make the clamping jaw cylinder rise above the transparent measuring cup.

[0041] As Figure 10As shown, the transparent heating cup 7 is provided with a temperature control heating mechanism 13, which specifically includes a temperature relay 1301 and an electric heating rod 1302. The temperature relay 1301 is installed on one side of the transparent heating cup 7, and the electric heating rod 1302 is vertically installed in the transparent heating cup 7. The output loop of the temperature relay 1301 is connected with the electric heating rod 1302 and the power supply by wires to form a closed loop.

[0042] When the temperature relay senses that the temperature in the transparent heating cup is lower than the set temperature, the electric heating rod is powered on to heat the colored liquid in the transparent heating cup. When the temperature relay senses that the temperature in the transparent heating cup is higher than the set temperature, the electric heating rod is powered off to stop heating the colored liquid in the transparent heating cup.

[0043] As shown, Figure 9 The first end of the liquid inlet pipe of the pumping mechanism 8 is inserted into the bottom of the transparent heating cup 7, and the tail end of the liquid outlet pipe of the pumping mechanism 8 is inserted into the transparent stirring cup 2. Specifically, the pumping mechanism 8 includes a third motor bracket 801, a micro water pump 802, a liquid inlet pipe 803, a liquid outlet pipe 804, a fourth intermediate relay 805, and a liquid level sensor 806. The third motor bracket 801 and the fourth intermediate relay 805 are respectively installed on the front surface of the white vertical plate 102. The micro water pump 802 is installed on the third motor bracket 801. The tail end of the liquid inlet pipe 803 is connected with the water inlet nozzle of the micro water pump 802. The first end of the liquid outlet pipe 804 is connected with the water outlet nozzle of the micro water pump 802. The liquid level sensor 806 is installed on the transparent heating cup 7. The liquid level sensor 806 is connected with the PLC controller 9 through a cable. The input loop of the fourth intermediate relay 805 is connected with the PLC controller 9 through a cable. The output loop of the fourth intermediate relay 805, the micro water pump 802, and the switching power supply 11 are connected by wires to form a closed loop.

[0044] The liquid level sensor sends the monitored liquid level information in the transparent heating cup to the PLC controller. If the PLC controller determines through logic that the liquid level height in the transparent heating cup meets the pumping standard, it sends a water pump working signal to the fourth intermediate relay, which controls the micro water pump to work and pump the colored liquid in the transparent heating cup into the transparent stirring cup. If the PLC controller determines through logic that the liquid level height in the transparent heating cup does not meet the pumping standard, it sends a water pump stop working signal to the fourth intermediate relay, which controls the micro water pump to stop working and thus stops pumping the colored liquid in the transparent heating cup into the transparent stirring cup.

[0045] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. An electrical automation teaching demonstration device, characterized in that: The system includes a demonstration stand placed on the ground, a transparent measuring cup for measuring and transferring liquids, and a transparent stirring cup, a variable frequency stirring mechanism, a draining mechanism, a measuring cup servo rotation mechanism, a measuring cup clamping, lifting, and flipping mechanism, a transparent heating cup, a pumping mechanism, a PLC controller, a touch screen, and a switching power supply. The stirring blade of the variable frequency stirring mechanism extends into the transparent stirring cup. The inlet of the draining mechanism is connected to the bottom of one side of the transparent stirring cup, and the drain outlet of the draining mechanism faces the center of the transparent measuring cup below it. The transparent measuring cup is placed on the measuring cup servo rotation mechanism, and the measuring cup clamping, lifting, and flipping mechanism is located at the measuring cup servo rotation mechanism. Above the mechanism and the transparent heating cup, a temperature-controlled heating mechanism is installed on the transparent heating cup. The first end of the inlet pipe of the pumping mechanism is inserted into the bottom of the transparent heating cup, and the last end of the outlet pipe of the pumping mechanism is inserted into the transparent stirring cup. The PLC controller is connected to the frequency conversion stirring mechanism, the drainage mechanism, the measuring cup servo rotation mechanism, the measuring cup clamping lifting and flipping mechanism, the pumping mechanism, and the touch screen through cables. The switching power supply supplies power to the frequency conversion stirring mechanism, the drainage mechanism, the measuring cup servo rotation mechanism, the measuring cup clamping lifting and flipping mechanism, the pumping mechanism, the PLC controller, and the touch screen through cables. The temperature-controlled heating mechanism and the switching power supply are powered by mains power.

2. The electrical automation teaching demonstration device according to claim 1, characterized in that: The demonstration stand includes a rectangular table, a white upright board, and a triangular support frame. The triangular support frame is installed on the top of the table, and the white upright board is installed on the vertical end of the triangular support frame. The white upright board is perpendicular to the top of the table. A mixing cup holder and a heating cup holder are installed on the front of the white upright board. The transparent mixing cup is installed on the mixing cup holder, and the transparent heating cup is installed on the heating cup holder.

3. The electrical automation teaching demonstration device according to claim 2, characterized in that: The variable frequency stirring mechanism includes a first motor frame, a variable frequency motor, a frequency converter, and a stirring paddle. The first motor frame and the frequency converter are respectively installed on the front of the white upright plate. The variable frequency motor is installed on the first motor frame. The top of the stirring paddle is connected to the motor shaft of the variable frequency motor through a coupling. The frequency converter is connected to the PLC controller, the variable frequency motor, and the switching power supply through cables.

4. The electrical automation teaching demonstration device according to claim 2, characterized in that: The drainage mechanism includes an L-shaped drainage pipe, an electric shut-off valve, and a time relay. The electric shut-off valve is installed in the middle of the drainage pipe. The inlet of the drainage pipe is connected to the bottom of one side of the transparent stirring cup. The drainage outlet of the drainage pipe faces the center of the transparent measuring cup below it. The input circuit of the time relay is connected to the PLC controller via a cable, and the output circuit of the time relay is connected to the electric shut-off valve and the switching power supply via a cable.

5. The electrical automation teaching demonstration device according to claim 2, characterized in that: The measuring cup servo rotation mechanism includes a second motor frame, a servo motor, a servo motor driver, and a rotating disk. The second motor frame and the servo motor driver are respectively mounted on the front of the white upright plate. The servo motor is mounted on the second motor frame, and the rotating disk is mounted on the motor shaft of the servo motor. Two measuring cup limiting rings arranged in a circular array are fixed to the top of the rotating disk. The transparent measuring cup is plugged into the measuring cup limiting rings. The servo motor driver is connected to the PLC controller, the servo motor, and the switching power supply through cables.

6. The electrical automation teaching demonstration device according to claim 2, characterized in that: The measuring cup clamping, lifting, and flipping mechanism includes a cylinder frame, a telescopic cylinder, a U-shaped adapter frame, a rotary cylinder, a square adapter plate, a gripper cylinder, a first electromagnetic reversing valve, a second electromagnetic reversing valve, a third electromagnetic reversing valve, a first intermediate relay, a second intermediate relay, and a third intermediate relay. The cylinder frame, the first electromagnetic reversing valve, the second electromagnetic reversing valve, the third electromagnetic reversing valve, the first intermediate relay, the second intermediate relay, and the third intermediate relay are respectively mounted on the front of a white upright plate. The telescopic cylinder is vertically mounted at the bottom of the cylinder frame. The U-shaped adapter frame is mounted at the end of the telescopic rod of the telescopic cylinder. The rotary cylinder is mounted in the U-shaped adapter frame. The adapter plate is mounted on the rotating disk of the rotary cylinder. The gripper cylinder is mounted on the rotating disk of the rotary cylinder. On the front of the connector plate, the telescopic cylinder is connected to the first solenoid directional valve via an air supply pipe, the rotary cylinder is connected to the second solenoid directional valve via an air supply pipe, and the gripper cylinder is connected to the third solenoid directional valve via an air supply pipe. The PLC controller is connected to the input circuits of the first intermediate relay, the second intermediate relay, and the third intermediate relay via cables. The output circuit of the first intermediate relay, the switching power supply, and the first solenoid directional valve are connected by wires to form a closed loop. The output circuit of the second intermediate relay, the switching power supply, and the second solenoid directional valve are connected by wires to form a closed loop. The output circuit of the third intermediate relay, the switching power supply, and the third solenoid directional valve are connected by wires to form a closed loop.

7. The electrical automation teaching demonstration device according to claim 6, characterized in that: Two sets of telescopic guide rods are installed between the cylinder frame and the U-shaped adapter frame.

8. The electrical automation teaching demonstration device according to claim 2, characterized in that: The pumping mechanism includes a third motor frame, a micro water pump, an inlet pipe, an outlet pipe, a fourth intermediate relay, and a level sensor. The third motor frame and the fourth intermediate relay are respectively mounted on the front of the white upright plate. The micro water pump is mounted on the third motor frame. The tail end of the inlet pipe is connected to the inlet of the micro water pump, and the head end of the outlet pipe is connected to the outlet of the micro water pump. The level sensor is mounted on a transparent heating cup and is connected to a PLC controller via a cable. The input circuit of the fourth intermediate relay is connected to the PLC controller via a cable. The output circuit of the fourth intermediate relay, the micro water pump, and the switching power supply are connected by wires to form a closed loop.

9. The electrical automation teaching demonstration device according to claim 2, characterized in that: The temperature control heating mechanism includes a temperature relay and an electric heating rod. The temperature relay is installed on one side of the transparent heating cup, and the electric heating rod is installed vertically inside the transparent heating cup. The output circuit of the temperature relay is connected to the electric heating rod and the mains power supply by wires to form a closed circuit.

10. The electrical automation teaching demonstration device according to claim 1, characterized in that: Both the transparent stirring cup and the transparent heating cup contain colored liquids.

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