Simulation device of variable-frequency constant-pressure water supply system for competition

Abstract

The utility model discloses a frequency conversion constant pressure water supply system simulation device for competition, and belongs to the field of training competition equipment. The variable-frequency constant-pressure water supply system simulation device for the competition comprises a constant-pressure water supply simulation part and an electrical control part, and the constant-pressure water supply simulation part is additionally provided with a surge tank, so that the pressure stability of water supply experimental equipment is ensured, and the accuracy of practical training and assessment results can be ensured; the electrical control part is provided with electrical elements capable of wiring automatically, and the electrical elements are integrated on an element mounting bottom plate, so that practical training contents and assessment tasks including system design, programming, electrical installation, water supply debugging and the like can be realized, and the aims of comprehensive teaching training and skill investigation are fulfilled; the device has the characteristics of safety, reliability, portability, convenience, economy and practicability, and can be widely applied to the fields of technical training of tap water companies, electrical automation teaching of schools, emergency temporary water supply and the like.

Description

Technical Field

[0001] The utility model relates to a water supply competition training device, and more specifically, to a simulation device of a variable-frequency constant-pressure water supply system for competition. Background Art

[0002] The variable-frequency constant-pressure water supply system is a widely used water treatment system. By using advanced variable-frequency speed regulation technology, it can achieve energy-saving and efficient water supply functions. In modern buildings, especially in the domestic water supply and fire protection water supply systems of residential areas and high-rise buildings, the variable-frequency constant-pressure water supply system is increasingly favored.

[0003] The design of this variable-frequency constant-pressure water supply system mainly includes components such as pressure sensors, programmable logic controllers (PLCs), frequency converters, water pumps, and pipelines. In the field of intelligent building teaching, the variable-frequency constant-pressure water supply system has also been widely studied. However, due to the complex structure and difficulty in demonstration of the actual application system, it is not suitable as an electrical maintenance competition device for the variable-frequency constant-pressure water supply system. To meet the needs of teaching, training, skill assessment, and competition, some different constant-pressure water supply experimental devices have emerged on the market. However, affected by problems such as uneven performance, lack of system integrity and integration, the actual application effect is poor. In addition, the constant-pressure water supply systems produced by some manufacturers adopt traditional relay contactor control circuits. This design makes the equipment bulky, the circuit complex, and the manufacturing cost high, all of which are not suitable for variable-frequency constant-pressure water supply competitions.

[0004] Generally speaking, the existing constant-pressure water supply experimental devices mainly have the following deficiencies:

[0005] 1) The existing constant-pressure water supply experimental devices mainly reflect the working principle and related parameter settings of the variable-frequency constant-pressure water supply system, lacking the integration of functions such as electrical control wiring, programming, calibration, and maintenance. Therefore, they lack system integrity and cannot achieve comprehensive teaching training and skill assessment;

[0006] 2) They simply restore the working principle of the variable-frequency constant-pressure water supply system. Due to the large differences between the experimental device and the actual system, the related parameters of the experimental device are prone to large fluctuations, especially the water supply pressure is unstable. As a result, the related parameters of the system are prone to deviations, making it difficult to truly reflect the training and assessment results. Summary of the Invention

[0007] 1. Technical Problems to be Solved by the Utility Model

[0008] The purpose of the present utility model is to overcome the above-mentioned deficiencies existing in the existing constant pressure water supply experimental equipment, and to provide a simulation device for a variable frequency constant pressure water supply system for competitions. By adopting the technical solution of the present utility model, a pressure stabilizing tank is added to the constant pressure water supply simulation part, ensuring the pressure stability of the water supply experimental equipment and the accuracy of the training and assessment results; in the electrical control part, electrical components that can be wired independently are provided, and each electrical component is integrated on the component installation base plate, which can realize training contents and assessment tasks including system design, program compilation, electrical installation, water supply debugging, etc., achieving the purpose of comprehensive teaching training and skill inspection, and having the characteristics of safety, reliability, portability, convenience, economy and practicality, and can be widely applied to technical training of water supply companies, electrical automation teaching in schools, emergency temporary water supply and other fields.

[0009] 2. Technical solution

[0010] To achieve the above object, the technical solution provided by the present utility model is as follows:

[0011] A simulation device for a variable frequency constant pressure water supply system for competitions of the present utility model includes a constant pressure water supply simulation part and an electrical control part. Among them,

[0012] The constant pressure water supply simulation part includes a small water tank, a booster pump, a water delivery main pipe, a pressure stabilizing tank, a digital display flow meter, a digital display pressure transmitter and a water outlet regulating valve. The water outlet of the small water tank is connected to the water inlet of the booster pump through a first pipeline, the water outlet of the booster pump is connected to the water delivery main pipe, the pressure stabilizing tank, the digital display flow meter and the digital display pressure transmitter are respectively installed on the water delivery main pipe, and the water outlet regulating valve is installed at the water outlet end of the water delivery main pipe;

[0013] The electrical control part includes a component installation base plate, a frequency converter, a programmable logic controller, low-voltage electrical components and a control element. The frequency converter, the programmable logic controller, the low-voltage electrical components and the control element are respectively installed on the component installation base plate, and each electrical component is connected by a wire according to the circuit relationship.

[0014] Furthermore, the digital input terminal of the programmable logic controller is connected to the control element, the digital output terminal of the programmable logic controller is connected to the low-voltage electrical components, the analog input terminal of the programmable logic controller is connected to the above-mentioned digital display pressure transmitter, the analog output terminal of the programmable logic controller is connected to the analog given terminal of the frequency converter, and the frequency converter is connected to the booster pump.

[0015] Furthermore, the low-voltage electrical components include a switching power supply, a power circuit breaker, a contactor, an intermediate relay, and a water pump circuit breaker. The switching power supply, the power circuit breaker, the contactor, the intermediate relay, and the water pump circuit breaker are respectively installed on the component mounting base plate. The switching power supply is respectively connected to the control element, the programmable logic controller, and the frequency converter to provide working power for the control element, the programmable logic controller, and the frequency converter. The programmable logic controller is respectively connected to the contactor and the frequency converter through the intermediate relay to send control signals to the contactor and the frequency converter. The power circuit breaker is connected to the frequency converter through the contactor, and the frequency converter is connected to the booster pump through the water pump circuit breaker to output a power supply with adjustable frequency and voltage to drive the booster pump to operate.

[0016] Furthermore, the frequency converter has an overload protection function, the power circuit breaker has a leakage protection function, and the drive motors of the frequency converter and the booster pump both have grounding protection terminals.

[0017] Furthermore, the electrical control part further includes an embedded touch control screen. The embedded touch control screen is installed on the component mounting base plate. The embedded touch control screen is connected to the programmable logic controller through an Ethernet cable to input constant pressure value data and transmit it to the programmable logic controller.

[0018] Furthermore, a tee joint is provided at the water outlet of the booster pump. One outlet of the tee joint is connected to the water delivery main pipe, and the other outlet is connected to the pressure stabilizing tank through a second pipeline.

[0019] Furthermore, a water outlet pipe is further provided at the water outlet end of the water outlet regulating valve. The water outlet pipe returns to the small water tank.

[0020] Furthermore, the small water tank is a rectangular stainless steel water tank, and a water filling port is also opened at the top of the small water tank.

[0021] 3. Beneficial effects

[0022] Adopting the technical solution provided by the present utility model, compared with the existing well-known technologies, the following beneficial effects are achieved:

[0023] (1) A simulation device for a variable-frequency constant-pressure water supply system for competitions of the present utility model includes a constant-pressure water supply simulation part and an electrical control part. A pressure stabilizing tank is added to the constant-pressure water supply simulation part, ensuring the pressure stability of the water supply experimental equipment and the accuracy of training and assessment results. In the electrical control part, electrical components that can be wired independently are provided. Each electrical component is integrated on the component installation base plate, enabling training contents and assessment tasks including system design, program compilation, electrical installation, water supply debugging, etc., achieving the purpose of comprehensive teaching training and skills inspection, and having the characteristics of safety, reliability, portability, convenience, economy and practicality. It can be widely applied in technical training of water supply companies, electrical automation teaching in schools, emergency temporary water supply and other fields;

[0024] (2) In a simulation device for a variable-frequency constant-pressure water supply system for competitions of the present utility model, the frequency converter has an overload protection function, the power circuit breaker has a leakage protection function, and the drive motors of the frequency converter and the booster pump both have grounding protection terminals to protect electrical safety and personnel safety, and it is safe and reliable to use;

[0025] (3) In a simulation device for a variable-frequency constant-pressure water supply system for competitions of the present utility model, a water outlet pipe is also provided at the water outlet end of the water outlet regulating valve, and the water outlet pipe returns to the small water tank, enabling the recycling of water in the water tank during the training competition process and saving water resources. In addition, the water outlet regulating valve can be manually adjusted to control the water output, and by testing the stability of the constant-pressure water supply system under different water consumption conditions, the excellent and good grades of the control system can be judged. Brief Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram of a simulation device for a variable-frequency constant-pressure water supply system for competitions of the present utility model;

[0027] Figure 2 is the structural schematic diagram of the constant-pressure water supply simulation part in a simulation device for a variable-frequency constant-pressure water supply system for competitions of the present utility model;

[0028] Figure 3 is the structural schematic diagram of the electrical control part in a simulation device for a variable-frequency constant-pressure water supply system for competitions of the present utility model;

[0029] Figure 4 is the circuit schematic diagram of a simulation device for a variable-frequency constant-pressure water supply system for competitions of the present utility model.

[0030] Explanation of the reference numerals in the schematic diagram:

[0031] 100. Constant pressure water supply simulation part; 101. Small water tank; 101a. Water filling port; 102. Booster pump; 102a. Three-way joint; 103. First pipeline; 104. Second pipeline; 105. Water delivery main pipe; 106. Pressure stabilizing tank; 107. Digital display flowmeter; 108. Digital display pressure transmitter; 109. Outlet regulating valve; 110. Outlet pipe

[0032] 200. Electrical control part; 201. Component installation base plate; 202. Frequency converter; 203. Switching power supply; 204. Power circuit breaker; 205. Programmable logic controller; 206. Contactor; 207. Intermediate relay; 208. Water pump circuit breaker Specific implementation method

[0033] To further understand the content of the present utility model, the present utility model will be described in detail with reference to the accompanying drawings and embodiments

[0034] [Embodiment]

[0035] Combined with Figure 1 As shown, a simulation device for a variable frequency constant pressure water supply system for competitions in this embodiment includes a constant pressure water supply simulation part 100 and an electrical control part 200. Among them

[0036] The constant pressure water supply simulation part 100 includes a small water tank 101, a booster pump 102, a water delivery main pipe 105, a pressure stabilizing tank 106, a digital display flowmeter 107, a digital display pressure transmitter 108, and an outlet regulating valve 109. The small water tank 101 is used to simulate water storage in the water tank. The outlet of the small water tank 101 is connected to the inlet of the booster pump 102 through the first pipeline 103. The outlet is located at the bottom of the small water tank 101. The outlet of the booster pump 102 is connected to the water delivery main pipe 105. The pressure stabilizing tank 106, the digital display flowmeter 107, and the digital display pressure transmitter 108 are respectively installed on the water delivery main pipe 105. The outlet regulating valve 109 is installed at the outlet end of the water delivery main pipe 105. When the booster pump 102 works, the water in the small water tank 101 can be transported to the water delivery main pipe 105 to simulate variable frequency constant pressure water supply

[0037] The electrical control part 200 includes a component installation base plate 201, a frequency converter 202, a programmable logic controller 205, low-voltage electrical components, and control elements. The component installation base plate 201 is a flat plate structure with several fixed holes, which can meet the installation of different electrical components. The frequency converter 202, the programmable logic controller 205, the low-voltage electrical components, and the control elements are respectively installed on the component installation base plate 201. Each electrical component is connected by wires according to the circuit relationship. The plug terminals and wires of each electrical component are of detachable design. During the training or competition assessment process, technicians can wire each electrical component according to the electrical principle

[0038] Using the above-mentioned variable-frequency constant-pressure water supply system simulation device for competitions, by adding a pressure stabilizing tank to the constant-pressure water supply simulation part, the pressure stability of the water supply experimental equipment is ensured, and the accuracy of training and assessment results can be guaranteed; in the electrical control part, electrical components that can be wired independently are provided, and each electrical component is integrated on the component installation base plate, and training contents and assessment tasks including system design, program compilation, electrical installation, water supply commissioning, etc. can be realized, achieving the purpose of comprehensive teaching training and skills inspection, and having the characteristics of safety, reliability, portability, convenience, economy and practicality, and can be widely used in technical training of water supply companies, electrical automation teaching in schools, emergency temporary water supply and other fields.

[0039] Specifically in this embodiment, the digital input terminals of the programmable logic controller 205 are connected to the control elements, the digital output terminals of the programmable logic controller 205 are connected to the low-voltage electrical components, the analog input terminals of the programmable logic controller 205 are connected to the above-mentioned digital display pressure transmitter 108, the analog output terminals of the programmable logic controller 205 are connected to the analog given terminals of the frequency converter 202, and the frequency converter 202 is connected to the booster pump 102. The control element can be a control switch, which can send control instructions to the programmable logic controller 205, and the programmable logic controller 205 controls the low-voltage electrical components to perform corresponding actions. The digital display pressure transmitter 108 is used to feedback the water supply pressure to the programmable logic controller 205, and the programmable logic controller 205 controls the frequency converter 202 to output the voltage for driving the booster pump 102 to operate. The output voltage and frequency of the frequency converter 202 can be adjusted according to the pressure detected by the digital display pressure transmitter 108, so as to realize constant-pressure water supply. Among them, as Figure 3 and Figure 4 shown, the low-voltage electrical components include a switching power supply 203, a power circuit breaker 204, a contactor 206, an intermediate relay 207 and a pump circuit breaker 208. The switching power supply 203, the power circuit breaker 204, the contactor 206, the intermediate relay 207 and the pump circuit breaker 208 are respectively installed on the component installation base plate 201. The switching power supply 203 is respectively connected to the control element, the programmable logic controller 205 and the frequency converter 202, and is used to provide working power for electrical components such as the control element, the programmable logic controller 205 and the frequency converter 202; the programmable logic controller 205 is respectively connected to the contactor 206 and the frequency converter 202 through the intermediate relay 207, and is used to send control signals to the contactor 206 and the frequency converter 202; the power circuit breaker 204 is connected to the frequency converter 202 through the contactor 206, and the frequency converter 202 is connected to the booster pump 102 through the pump circuit breaker 208, and is used to output a power supply with adjustable frequency and voltage to drive the booster pump 102 to operate. The pump circuit breaker 208 can facilitate the simulation debugging of the control program and the switching between actual operations.

[0040] To further improve the circuit safety, the above-mentioned frequency converter 202 is equipped with an overload protection function. Specifically, an overload protection module can be integrated in the frequency converter 202; the power circuit breaker 204 is equipped with a leakage protection function. Specifically, a leakage protector can be integrated on the power circuit breaker 204; both the frequency converter 202 and the drive motor of the booster pump 102 have grounding protection terminals. With the above design, the safety of electrical equipment and personnel can be protected, and the use is safe and reliable.

[0041] In addition, the above-mentioned electrical control part 200 also includes an embedded touch control screen. The embedded touch control screen is installed on the component mounting base plate 201 and is connected to the programmable logic controller 205 through an Ethernet cable, and is used to input constant pressure value data and transmit it to the programmable logic controller 205. The above-mentioned control elements can also be integrated in the embedded touch control screen, that is, the button control function of the control elements is realized through software in the embedded touch control screen, such as controlling the start or stop of the control system.

[0042] As Figure 2 shown, a tee joint 102a is provided at the water outlet of the booster pump 102. One outlet of the tee joint 102a is connected to the water delivery main pipe 105, and the other outlet is connected to the pressure stabilizing tank 106 through the second pipe 104, and the connection is simple and convenient. The above-mentioned first pipe 103, second pipe 104 and water delivery main pipe 105 can all be made of flexible hoses. An outlet pipe 110 is also provided at the water outlet end of the above-mentioned water outlet regulating valve 109, and the outlet pipe 110 returns to the small water tank 101. The above-mentioned outlet pipe 110 can also be made of a flexible hose, which can realize the recycling of water in the water tank during the training competition and save water resources; in addition, the water outlet regulating valve 109 can be manually adjusted to control the water output, and the stability of the constant pressure water supply system under different water consumption conditions can be tested to evaluate the excellent level of the control system. The above-mentioned small water tank 101 is a rectangular stainless steel water tank, and a water filling port 101a is also opened at the top of the small water tank 101, and the water outlet end of the outlet pipe 110 can be directly placed into the water filling port 101a.

[0043] A simulation device for a variable-frequency constant-pressure water supply system used in competitions of the present utility model. The analog input unit of the programmable logic controller 205 collects the pressure signal of the main water delivery pipe 105. The constant water supply pressure value can be set through the embedded touch control screen. The programmable logic controller 205 realizes the constant-pressure water supply algorithm through mathematical programming and gives the variable-frequency signal through the integrated analog output module. The programmable logic controller 205 controls the start and stop of the frequency converter 202 through digital signals. The frequency converter 202 drives the booster pump 102 to pump water from the small water tank 101 and boost the pressure into the main water delivery pipe 105 under the control of the PLC, realizing the function of constant-pressure water supply. It solves the problem that in the practical operation competition project of constant-pressure water supply for maintenance electricians in the water supply industry, technicians can master the principles, usage methods, and expandability of various basic components through this simulation device. More content on basic principles can be carried out in the training, enabling the trainees to understand and master deeper knowledge and become comprehensive application, design, and R & D-type talents with all-round capabilities. At the same time, it also solves the problem of practical operation tools for the competition project of "constant-pressure variable-frequency water supply system" for mechanical and electrical maintenance workers. The contestants can independently complete assessment tasks including system design, program compilation, electrical installation, and water supply debugging through this simulation device within the specified time, which can not only assess the professional skills of the contestants but also examine their psychological qualities and the ability to discover and solve problems in actual work.

[0044] Specifically, the simulation device for a variable-frequency constant-pressure water supply system used in competitions of the present utility model can also be used for the training or competition of the following contents:

[0045] 1) The electrical control part includes a component installation base plate, a frequency converter, a programmable logic controller, low-voltage electrical components, and control elements. The low-voltage electrical components include a switching power supply, a power circuit breaker, a contactor, an intermediate relay, and a pump circuit breaker, and can be used for electrical control wiring competitions.

[0046] 2) The electrical control part is equipped with a programmable logic controller (PLC) and can be used for PLC automatic control programming competitions.

[0047] 3) The electrical control part is equipped with a frequency converter. The input power supply of the frequency converter is single-phase 220V alternating current, making the application range of this electrical control part wide and convenient, and can be used for frequency converter control competitions.

[0048] 4) The main water delivery pipe of the constant-pressure water supply simulation part is equipped with a digital display flow meter, and the water outlet end of the main water delivery pipe is equipped with a water outlet regulating valve, and can be used for booster pump wiring maintenance competitions.

[0049] 5) The constant-pressure water supply simulation part is equipped with a digital display pressure transmitter and can be used for instrument wiring and calibration maintenance competitions.

[0050] 6) The constant pressure water supply simulation part and the electrical control part are electrically connected to form a constant pressure water supply system, which can be used for the PID constant pressure water supply control competition.

[0051] The above has schematically described the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural manners and embodiments similar to the technical solution without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A variable frequency constant pressure water supply system simulation device for competition, characterized by: It comprises a constant pressure water supply simulation part (100) and an electrical control part (200), wherein: The constant pressure water supply simulation part (100) comprises a small water tank (101), a booster water pump (102), a water main pipe (105), a pressure stabilizing tank (106), a digital flow meter (107), a digital pressure transmitter (108) and a water outlet regulating valve (109); the water outlet of the small water tank (101) is connected to the water inlet of the booster water pump (102) through a first pipe (103); the water outlet of the booster water pump (102) is connected to the water main pipe (105); the pressure stabilizing tank (106), the digital flow meter (107) and the digital pressure transmitter (108) are respectively installed on the water main pipe (105); and the water outlet regulating valve (109) is installed at the water outlet end of the water main pipe (105); The electrical control part (200) comprises a component mounting base plate (201), a frequency converter (202), a programmable logic controller (205), a low-voltage electrical component and a control component. The frequency converter (202), the programmable logic controller (205), the low-voltage electrical component and the control component are respectively mounted on the component mounting base plate (201), and the electrical components are connected by wires according to circuit relationships.

2. The variable frequency constant pressure water supply system simulation device for competition according to claim 1 is characterized in that: The switch input end of the programmable logic controller (205) is connected to the control element, the switch output end of the programmable logic controller (205) is connected to the low-voltage electrical component, the analog input end of the programmable logic controller (205) is connected to the above-mentioned digital pressure transmitter (108), the analog output end of the programmable logic controller (205) is connected to the analog given terminal of the frequency converter (202), and the frequency converter (202) is connected to the booster water pump (102).

3. The variable frequency constant pressure water supply system simulation device for competition according to claim 2 is characterized in that: The low-voltage electrical component comprises a switching power supply (203), a power circuit breaker (204), a contactor (206), an intermediate relay (207) and a water pump circuit breaker (208); the switching power supply (203), the power circuit breaker (204), the contactor (206), the intermediate relay (207) and the water pump circuit breaker (208) are respectively mounted on a component mounting base plate (201); the switching power supply (203) is respectively connected to a control component, a programmable logic controller (205) and a frequency converter (202) for controlling the control component, the programmable logic controller ( The programmable logic controller (205) is connected to the contactor (206) and the frequency converter (202) through an intermediate relay (207) and is used to send control signals to the contactor (206) and the frequency converter (202); the power circuit breaker (204) is connected to the frequency converter (202) through the contactor (206), and the frequency converter (202) is connected to the booster water pump (102) through a water pump circuit breaker (208) and is used to output a power supply with adjustable frequency and voltage to drive the booster water pump (102) to operate.

4. The variable frequency constant pressure water supply system simulation device for competition according to claim 3 is characterized in that: The frequency converter (202) has an overload protection function, the power circuit breaker (204) has a leakage protection function, and the frequency converter (202) and the driving motor of the booster water pump (102) both have a grounding protection terminal.

5. The variable frequency constant pressure water supply system simulation device for competition according to claim 1 is characterized in that: The electrical control part (200) further comprises an embedded touch control screen, which is mounted on the component mounting base plate (201). The embedded touch control screen is connected to the programmable logic controller (205) via an Ethernet cable and is used to input constant pressure value data and transmit it to the programmable logic controller (205).

6. The variable frequency constant pressure water supply system simulation device for competition according to any one of claims 1 to 5, characterized in that: The water outlet of the booster water pump (102) is provided with a three-way joint (102a), one outlet of the three-way joint (102a) is connected to the water main pipe (105), and the other outlet is connected to the pressure stabilizing tank (106) through a second pipeline (104).

7. The variable frequency constant pressure water supply system simulation device for competition according to claim 6, characterized in that: The water outlet end of the water outlet regulating valve (109) is also provided with a water outlet pipe (110), and the water outlet pipe (110) flows back to the small water tank (101).

8. The variable frequency constant pressure water supply system simulation device for competition according to claim 7, characterized in that: The small water tank (101) is a rectangular stainless steel water tank, and a water inlet (101a) is provided on the top of the small water tank (101).

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