Portable open-loop and closed-loop demonstration device

Abstract

The utility model relates to the field of automation technology and engineering technology, and specifically discloses a portable open-closed loop demonstration device comprising a protection frame, two sides of the inner wall of the protection frame are fixedly connected with two groups of mounting racks; through the arrangement of the protection frame, the first transparent water tank and the second transparent water tank, when the device is used, the protection frame is a peripheral protection internal assembly and serves as a supporting frame of the device, the installation frame is used for fixing the first transparent water tank and the second transparent water tank, and the first transparent water tank and the second transparent water tank are used for demonstrating water circulation flow. The transparent baffle plate is used for separating the demonstration device, preventing the demonstration device from being damaged, maintaining the transparency of the whole device and facilitating observation, thereby visually displaying the demonstration process of water circulation flow, facilitating the observation of the internal water level change and flow condition, and realizing the protection and separation of the demonstration device. And meanwhile, the operation convenience and the closed-loop control of the system are ensured.

Description

Technical Field

[0001] The utility model belongs to the field of automation technology and engineering technology, and particularly relates to a portable open-closed loop demonstration device. Background Art

[0002] In traditional teaching methods, teachers often explain these concepts through theoretical lectures and blackboard drawings. However, this method often lacks intuitiveness and interactivity, making it difficult to stimulate students' interest in learning and in-depth understanding. Therefore, open-loop and closed-loop demonstration devices are used to show the operating principles and characteristics of open-loop and closed-loop control systems in an intuitive and vivid way.

[0003] However, the existing open-closed-loop demonstration device is relatively simple when in use, and is difficult to operate conveniently in terms of picking up and transporting. When teachers demonstrate the open-closed-loop process, they need to go through a series of complicated installation processes in the early stage, resulting in poor performance of the device. Therefore, staff need to improve it. Utility Model Content

[0004] The purpose of the utility model is to provide a portable open-closed loop demonstration device to solve the problem that the demonstration device proposed in the above background technology is inconvenient to carry and install.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A portable open-closed loop demonstration device comprising:

[0007] protective frame;

[0008] Two sets of mounting brackets are fixedly connected to both sides of the inner wall of the protection frame, and the inner walls of the two sets of mounting brackets are fixedly connected to the first transparent water tank and the second transparent water tank respectively;

[0009] A protective box is fixedly connected to one side of the top of the first transparent water tank, and a micro water pump is fixedly connected to one side of the inner wall of the protective box. A water pump is installed at the input end of the micro water pump, and the bottom end of the water pump is plugged into the inner wall of the first transparent water tank. A drain pipe is installed at the output end of the micro water pump, and the bottom end of the drain pipe is plugged into the inner wall of the second transparent water tank. A transparent hose is fixedly connected to the middle of the bottom of the second transparent water tank, and the top of the transparent hose is fixedly connected to the bottom of the first transparent water tank. A valve is rotatably connected to the middle of the inner wall of the transparent hose, a transparent baffle is fixedly connected to one side of the inner wall of the protective frame, and water level sensors are fixedly connected on both sides of the surface of the second transparent water tank.

[0010] Preferably, a water inlet pipe is fixedly connected to one side of the top of the first transparent water tank, and a water outlet pipe is fixedly connected to one side of the bottom of the first transparent water tank, and one end of the water inlet pipe and the water outlet pipe are both inserted into one side of the protective frame, and one end of the water inlet pipe and the water outlet pipe are both inserted into a sealing plug.

[0011] Preferably, connecting grooves are provided on both sides of the bottom of the protective frame, and a support frame is rotatably connected to one side of the inner wall of the connecting groove.

[0012] Preferably, one side of the protective frame is rotatably connected to an assembly frame via a hinge, one side of the inner wall of the assembly frame is fixedly connected to a control panel, the other side of the inner wall of the assembly frame is fixedly connected to a display panel, and the display panel and the control panel are electrically connected to each other.

[0013] Preferably, a handle is fixedly connected to the middle of the top of the protective frame, and female buckles are fixedly connected to both sides of the top of the protective frame.

[0014] Preferably, both sides of the surface of the assembly frame are fixedly connected with sub-buckles, and one side of the surface of the sub-buckle is inserted into the inner wall of the mother buckle.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) Through the setting of the protective frame, the first transparent water tank, the second transparent water tank, the suction pipe, the drainage pipe and the transparent hose, when in use, the protective frame is the outer protection of the internal components and serves as the support frame of the device, the mounting frame is used to fix the first transparent water tank and the second transparent water tank, the first transparent water tank and the second transparent water tank are used to display the demonstration of water circulation flow, which is convenient for observing the internal water level changes and flow conditions, the transparent baffle is used to separate the demonstration device to prevent the demonstration device from being damaged, and at the same time maintain the transparency of the entire device for easy observation, the water inlet pipe and the drainage pipe are used to add water to the first transparent water tank and discharge the water therein respectively, one end of which is inserted into the side of the protective frame for easy external connection and operation, the sealing plug is used to seal the openings of the water inlet pipe and the drainage pipe when water is not needed to be added or drained to prevent water leakage, thereby intuitively displaying the demonstration process of water circulation flow, facilitating the observation of internal water level changes and flow conditions, realizing the protection and separation of the demonstration device, and ensuring the convenience of operation and the closed-loop control of the system.

[0017] (2) Through the arrangement of the support frame, assembly frame, control panel and display panel, when the device is not in use, the support frame can be folded or retracted inside the connection slot to reduce the space occupied. When it needs to be displayed or used, the support frame can be unfolded to provide stable support for the device. The assembly frame serves as a protective cover for the protective frame and provides an additional functional area for the device. Through PLC control, there is an open-closed loop switch on the demonstration panel. The open-loop state can be controlled by a time relay or by inputting time through the screen and keyboard to control the operation time of the micro water pump, so that the device is easy to carry and store, and has stable support, precise control and real-time display functions, while ensuring the stability and safety of the assembly frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the three-dimensional diagrams of the present utility model;

[0019] Figure 2 This is the second stereogram of the utility model;

[0020] Figure 3 This is a three-dimensional diagram of the water level sensor of the present utility model;

[0021] Figure 4 A three-dimensional diagram of the support frame of the utility model;

[0022] In the figure: 1. Protection frame; 2. Mounting frame; 3. First transparent water tank; 4. Second transparent water tank; 5. Protection box; 6. Micro water pump; 7. Suction pipe; 8. Drain pipe; 9. Transparent hose; 10. Valve; 11. Transparent baffle; 12. Water level sensor; 13. Water inlet pipe; 14. Water outlet pipe; 15. Sealing plug; 16. Connecting groove; 17. Support frame; 18. Assembly frame; 19. Control panel; 20. Display panel; 21. Handle; 22. Mother buckle; 23. Child buckle. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1:

[0025] See also Figure 1 、 Figure 2 and Figure 3 As shown, a portable open-closed loop demonstration device comprises:

[0026] Protective frame 1;

[0027] Two sets of mounting frames 2 are fixedly connected to both sides of the inner wall of the protective frame 1. The protective frame 1 is the outer periphery to protect the internal components and serves as the support frame of the device. The mounting frames 2 are used to fix the first transparent water tank 3 and the second transparent water tank 4. The inner walls of the two sets of mounting frames 2 are fixedly connected to the first transparent water tank 3 and the second transparent water tank 4 respectively. The first transparent water tank 3 and the second transparent water tank 4 are used to demonstrate the circulation of water, making it easy to observe the changes in the water level and the flow inside.

[0028] A protective box 5 is fixedly connected to one side of the top of the first transparent water tank 3, and a micro water pump 6 is fixedly connected to one side of the inner wall of the protective box 5. A pumping pipe 7 is installed at the input end of the micro water pump 6, and the bottom end of the pumping pipe 7 is plugged into the inner wall of the first transparent water tank 3. A drain pipe 8 is installed at the output end of the micro water pump 6, and the bottom end of the drain pipe 8 is plugged into the inner wall of the second transparent water tank 4. The input end of the micro water pump 6 pumps water out of the first transparent water tank 3 through the pumping pipe 7, and the output end of the micro water pump 6 injects it into the second transparent water tank 4 through the drain pipe 8. , a transparent hose 9 is fixedly connected to the middle of the bottom of the second transparent water tank 4, and the top of the transparent hose 9 is fixedly connected to the bottom of the first transparent water tank 3. A valve 10 is rotatably connected to the middle of the inner wall of the transparent hose 9. The transparent hose 9 connects the hoses at the bottom of the first transparent water tank 3 and the bottom of the second transparent water tank 4. When the valve 10 is opened, the water in the second transparent water tank 4 is allowed to flow back into the first transparent water tank 3 to form a closed-loop system. The valve 10 is installed in the middle of the transparent hose 9 to control the on and off of the water flow in the transparent hose 9, thereby controlling the opening and closing state of the entire system. A transparent baffle 11 is fixedly connected to one side of the inner wall of the protective frame 1. The transparent baffle 11 is used to separate the demonstration device to prevent the demonstration device from being damaged, while maintaining the transparency of the entire device for easy observation. Water level sensors 12 are fixedly connected on both sides of the surface of the second transparent water tank 4. The water level sensor 12 is used to detect water level changes in the water tank and is used to automatically control the operation of the micro water pump 6 or provide water level feedback. A water inlet pipe 13 is fixedly connected to one side of the top of the first transparent water tank 3. A water outlet pipe 14 is fixedly connected to one side of the bottom, and one end of the water inlet pipe 13 and the water outlet pipe 14 are both inserted into one side of the protective frame 1, and one end of the water inlet pipe 13 and the water outlet pipe 14 are both inserted into a sealing plug 15. The water inlet pipe 13 and the water outlet pipe 14 are respectively used to add water to the first transparent water tank 3 and discharge the water therein. One end of them is inserted into one side of the protective frame 1 for easy external connection and operation. The sealing plug 15 is used to seal the openings of the water inlet pipe 13 and the water outlet pipe 14 when water inlet or water discharge is not required to prevent water leakage.

[0029] Example 2:

[0030] See also Figure 1 、 Figure 2 and Figure 4As shown, connecting grooves 16 are provided on both sides of the bottom of the protective frame 1, and a support frame 17 is rotatably connected to one side of the inner wall of the connecting groove 16. When the device is not in use, the support frame 17 can be folded or retracted inside the connecting groove 16 to reduce the occupied space. When it needs to be displayed or used, the support frame 17 can be unfolded to provide stable support for the device. An assembly frame 18 is rotatably connected to one side of the protective frame 1 through a hinge. The assembly frame 18 serves as a protective cover for the protective frame 1 and provides an additional functional area for the device. A control panel 19 is fixedly connected to one side of the inner wall of the assembly frame 18, and a display panel 20 is fixedly connected to the other side of the inner wall of the assembly frame 18, and the display panel 20 and the control panel 19 are electrically connected to each other. The control panel 19 is used to control the operation of the device, such as starting or stopping the micro water pump 6, and the display panel 20 is used to display the operation of the device. Status, such as the status of the water level sensor 12, the operating status of the micro water pump 6, etc. The two panels are electrically connected to ensure that the control instructions can be accurately transmitted to the corresponding components, and the display information can also be updated in real time. It is controlled by PLC, and there is an open-closed loop switch on the demonstration panel. The open-loop state can be controlled by a time relay or by entering the time through the screen and keyboard to control the operating time of the micro water pump 6. A handle 21 is fixedly connected to the middle of the top of the protective frame 1, and both sides of the top of the protective frame 1 are fixedly connected to a female buckle 22. Both sides of the surface of the assembly frame 18 are fixedly connected to a sub-buckle 23, and one side of the surface of the sub-buckle 23 is inserted into the inner wall of the female buckle 22. When the assembly frame 18 is closed, the sub-buckle 23 can be inserted into the female buckle 22 to ensure that the assembly frame 18 is firmly fixed on the protective frame 1 to prevent accidental opening or falling off.

[0031] Example 3:

[0032] See also Figures 1 to 4 As shown, in automation control courses, students need to understand the basic concepts and working principles of open-loop and closed-loop control systems. Traditional teaching methods may rely on theoretical explanations and blackboard drawings, but this approach often lacks intuitiveness and interactivity, making it difficult to stimulate students' learning interest and in-depth understanding. Therefore, teachers can use the portable open-loop and closed-loop demonstration device described in this document to provide students with an intuitive and interactive learning experience. The following are specific application steps.

[0033] Open-loop control demonstration:

[0034] The teacher sets the demonstration device to open-loop mode. In open-loop mode, the micropump draws water from the first transparent water tank through a pumping pipe and pours it into the second transparent water tank. Students can observe changes in the water level, but the system does not automatically adjust the pump's operating state based on the water level changes.

[0035] The teacher explains the characteristics of an open-loop control system, which is that the system output is not fed back to the input, so the system cannot self-adjust to adapt to changes in external conditions.

[0036] Closed-loop control demonstration:

[0037] Next, the teacher switches the demonstration device to closed-loop mode. In closed-loop mode, the water level sensor detects the water level changes in the second transparent water tank and feeds the signal back to the control panel.

[0038] The control panel automatically adjusts the micro-pump's operating state based on feedback from the water level sensor to maintain the water level within a set range. Students can observe the valve opening and closing, and the pump starting and stopping, thus understanding how closed-loop control systems self-regulate based on feedback signals.

[0039] Actual operation:

[0040] Students worked in groups to operate the demonstration device, experiencing firsthand the differences between open-loop and closed-loop control. They adjusted the valve opening and observed the water level changes and the control system's response.

[0041] Students can also try to simulate different control strategies by inputting different parameters, such as the running time of the pump, through the control panel and observe the behavior of the system.

[0042] Discussion and Analysis:

[0043] After the practical operation, the teacher guides students to discuss the advantages and disadvantages of open-loop and closed-loop control systems, as well as their significance in practical applications.

[0044] Students can analyze water level change data and discuss how to optimize control strategies to improve system performance.

[0045] By using this portable open- and closed-loop demonstration device, students can not only visually observe the working principles of the control system but also deepen their understanding of theoretical knowledge through practical operation. This interactive learning method helps to increase students' learning interest and participation, enabling them to better grasp the basic concepts and skills of automated control.

[0046] Working principle: When in use, the protective frame 1 is the outer protection of the internal components and serves as the supporting frame of the device. The mounting frame 2 is used to fix the first transparent water tank 3 and the second transparent water tank 4. The first transparent water tank 3 and the second transparent water tank 4 are used to demonstrate the circulation of water, which is convenient for observing the internal water level changes and flow conditions. The staff connects the micro water pump 6 to the power supply, and the input end of the micro water pump 6 pumps the water out of the first transparent water tank 3 through the pumping pipe 7. The output end of the micro water pump 6 injects the water into the second transparent water tank 4 through the drain pipe 8. The transparent hose 9 connects the bottom of the first transparent water tank 3 and the bottom of the second transparent water tank 4 to open the valve 10. When the water in the second transparent water tank 4 is turned on and off, it allows the water in the second transparent water tank 4 to flow back into the first transparent water tank 3, forming a closed-loop system. The valve 10 is installed in the middle of the transparent hose 9 to control the on-off of the water flow in the transparent hose 9. The transparent baffle 11 is used to separate the demonstration device to prevent the demonstration device from being damaged, while maintaining the transparency of the entire device for easy observation. The water level sensor 12 is used to detect the water level change in the water tank and is used to automatically control the operation of the micro water pump 6 or provide water level feedback. The water inlet pipe 13 and the water outlet pipe 14 are used to add water to the first transparent water tank 3 and discharge the water therein, respectively. One end of each of them is inserted into one side of the protective frame 1 for easy access outside. The sealing plug 15 is used to seal the openings of the water inlet pipe 13 and the water outlet pipe 14 when water inlet or water outlet is not required to prevent water leakage. When the device is not in use, the support frame 17 can be folded or retracted inside the connection groove 16 to reduce the occupied space. When it needs to be displayed or used, the support frame 17 can be unfolded to provide stable support for the device. The assembly frame 18 serves as a protective cover for the protective frame 1 and provides an additional functional area for the device. The control panel 19 is used to control the operation of the device, such as starting or stopping the micro water pump 6, and the display panel 20 is used to display the operating status of the device, such as the status of the water level sensor 12 and the micro water pump 6. The electrical connection between the two panels ensures that the control instructions can be accurately transmitted to the corresponding components, and the display information can also be updated in real time through PLC control. There is an open-closed loop switch on the demonstration panel. The open-loop state can be controlled by a time relay or by inputting time through the screen and keyboard to control the operation time of the micro water pump 6. The female buckles 22 fixedly connected on both sides of the top of the protective frame 1 cooperate with the sub-buckles 23 fixedly connected on both sides of the surface of the assembly frame 18. When the assembly frame 18 is closed, the sub-buckles 23 can be inserted into the female buckles 22 to ensure that the assembly frame 18 is firmly fixed on the protective frame 1 to prevent accidental opening or falling off.

[0047] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable open-closed loop demonstration device, characterized in that: include: Protective frame (1); Two sets of mounting frames (2) are fixedly connected to both sides of the inner wall of the protection frame (1), and the inner walls of the two sets of mounting frames (2) are respectively fixedly connected to a first transparent water tank (3) and a second transparent water tank (4); A protective box (5) is fixedly connected to one side of the top of the first transparent water tank (3), a micro water pump (6) is fixedly connected to one side of the inner wall of the protective box (5), a water pump (7) is installed at the input end of the micro water pump (6), and the bottom end of the water pump (7) is plugged into the inner wall of the first transparent water tank (3), a drain pipe (8) is installed at the output end of the micro water pump (6), and the bottom end of the drain pipe (8) is plugged into the inner wall of the second transparent water tank (4), a transparent hose (9) is fixedly connected to the middle of the bottom of the second transparent water tank (4), and the top end of the transparent hose (9) is fixedly connected to the bottom of the first transparent water tank (3), a valve (10) is rotatably connected to the middle of the inner wall of the transparent hose (9), a transparent baffle (11) is fixedly connected to one side of the inner wall of the protective frame (1), and water level sensors (12) are fixedly connected to both sides of the surface of the second transparent water tank (4).

2. A portable open-closed loop demonstration device according to claim 1, characterized in that: One side of the top of the first transparent water tank (3) is fixedly connected to a water inlet pipe (13), and one side of the bottom of the first transparent water tank (3) is fixedly connected to a water outlet pipe (14), and one end of each of the water inlet pipe (13) and the water outlet pipe (14) is inserted into one side of the protective frame (1), and one end of each of the water inlet pipe (13) and the water outlet pipe (14) is inserted into a sealing plug (15).

3. A portable open-closed loop demonstration device according to claim 1, characterized in that: Both sides of the bottom of the protection frame (1) are provided with connection grooves (16), and one side of the inner wall of the connection groove (16) is rotatably connected to a support frame (17).

4. A portable open-closed loop demonstration device according to claim 1, characterized in that: One side of the protective frame (1) is rotatably connected to an assembly frame (18) via a hinge, one side of the inner wall of the assembly frame (18) is fixedly connected to a control panel (19), and the other side of the inner wall of the assembly frame (18) is fixedly connected to a display panel (20), and the display panel (20) and the control panel (19) are electrically connected to each other.

5. A portable open-closed loop demonstration device according to claim 1, characterized in that: A handle (21) is fixedly connected to the middle of the top of the protection frame (1), and female buckles (22) are fixedly connected to both sides of the top of the protection frame (1).

6. A portable open-closed loop demonstration device according to claim 4, characterized in that: Both sides of the surface of the assembly frame (18) are fixedly connected with sub-clasps (23), and one side of the surface of the sub-clasps (23) is plugged into the inner wall of the mother clasp (22).

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