CN201166939Y - Constant pressure water supply teaching and training device - Google Patents

Abstract

The utility model relates to a constant pressure water supply teaching and training device, which comprises a constant pressure water supply control module, an executive mechanism and a power distribution cabinet. The constant pressure water supply control module is provided with a pressure sensor, a frequency converter, a PLC and a converter. The converter includes a contactor The actuator and relay, the actuator includes the water pump, the water tank and the connecting water pipe; the pressure sensor transmits the pressure signal to the frequency converter, and the frequency converter outputs the signal of increasing or decreasing the pump to the PLC according to the pressure signal, through PID operation adjustment, and the PLC controls the action of the contactor , and then the contactor controls the operation of the water pump. There is also a fault control module electrically connected to the frequency converter, PLC, converter and power distribution cabinet. The fault control module includes several switches and corresponding connecting wires. The beneficial effect is that the fault setting is convenient, flexible and authentic, and is an ideal device for improving the professional level of maintenance personnel.

Description

Constant pressure water supply teaching and training device

Technical field:

The utility model relates to a teaching instrument and equipment used for teaching, training and examination of students majoring in electrical and electronic engineering in higher vocational colleges and colleges, in particular to a teaching and training device for constant pressure water supply.

Background technique:

With the rapid increase of high-rise buildings, constant pressure water supply equipment has become a must-have equipment. The reliable operation of constant pressure water supply equipment is a major event related to people's lives and personal and property safety. However, there is a serious shortage of professional maintenance personnel at present. In order to better train high-skilled professional maintenance personnel, teaching and practical training devices must be provided. Now, students only have theoretical knowledge and practical experience. It is not only time-consuming and inconvenient to visit and practice in units with real large-scale constant pressure water supply equipment, but also the effect is not good. Therefore, the constant pressure water supply teaching and training device has become an urgently needed device for training maintenance personnel of constant pressure water supply equipment.

Invention content:

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a constant-pressure water supply teaching and training device with complete functions, good teaching and training effects and convenient use.

The technical solution adopted by the utility model to solve the above technical problems is: constant pressure water supply teaching and training device, including constant pressure water supply control module, executive mechanism and power distribution cabinet, constant pressure water supply control module is equipped with pressure sensor, frequency converter, PLC And the converter, the converter includes contactors and relays, the actuator includes water pumps, water tanks, connecting water pipes and valves for adjusting water pressure; the pressure sensor transmits the pressure signal to the frequency converter, and the frequency converter is regulated by PID calculation according to the pressure signal and outputs Add or subtract pump signal to PLC, PLC controls the action of the contactor, and then the contactor controls the operation of the water pump. There is also a fault control module electrically connected to the frequency converter, PLC, converter and power distribution cabinet. The fault control module includes several switch and corresponding connecting wires.

The beneficial effect of the utility model is that: due to the fault control module, as long as a certain switch is operated, the device cannot operate normally, forming a fault point, which can be eliminated by students, and different switches represent various faults, forming a teaching practice. Training equipment, the utility model is convenient, flexible and authentic for fault setting, and is an ideal device for improving the professional level of maintenance personnel.

Description of drawings:

Fig. 1 is a block diagram of the utility model;

Fig. 2 is the electric principle diagram of the fault control module of the present invention.

Detailed ways:

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

As shown in Figure 1-2, the constant pressure water supply teaching and training device includes a constant pressure water supply control module, an actuator and a power distribution cabinet 1. The constant pressure water supply control module is equipped with a pressure sensor 2, a frequency converter 3, a PLC and a converter 4. The converter 4 includes a contactor and a relay. The actuator includes a water pump 5, a water tank 6, a water connection pipe and a valve 7 for adjusting water pressure. The water connection pipe includes a water inlet pipe 8 and a water outlet pipe 9. The water inlet pipe 8 is connected from the bottom of the water tank 6 to The inlet of the water pump 5 and the outlet pipe 9 are connected to the top of the water tank 6 from the outlet of the water pump 5 to form a circulation system. The valve 7 is arranged in the outlet pipe 9, and the present embodiment is provided with four water pumps; the pressure sensor 2 is arranged on the valve of the outlet pipe 9 At the front end of 7, the pressure sensor 2 transmits the pressure signal to the frequency converter 3, and the frequency converter 3 is adjusted by PID calculation according to the pressure signal, and outputs the signal of adding or reducing the pump to the PLC, and the PLC controls the action of the contactor, and then the contactor controls the water pump 5 operation, there is also a fault control module 10 electrically connected to the frequency converter 3, PLC, converter 4 and power distribution cabinet 1. The fault control module 10 of this embodiment includes 30 switches 11 and corresponding connecting wires. The fault control module 10 is also provided with 30 fault indicator lights 12 linked with the switch 11. When a certain switch is operated, the fault indicator light will light up to display the fault point. There is also a monitoring system 13 electrically connected to the PLC. The monitoring system 13 includes an application configuration software module to monitor and observe the operating status of the equipment. The power distribution cabinet 1 is provided with a voltmeter, an ammeter, a frequency meter to indicate, and a signal lamp to indicate the running state of the water pump. The transfer switch and manual buttons constitute automatic or manual control.

The working principle of the constant pressure water supply teaching and training device is as follows:

1. Manual operation

Press the button to start or stop the water pump, and the start and stop of the four water pumps can be controlled separately according to the needs. This mode is mainly used for maintenance and inverter failure.

2. Automatic control

After the automatic switch is turned on, a water pump motor is energized and started, and the output frequency of the inverter 3 rises from 0HZ. At the same time, the PID adjustment program will receive the electrical signal from the pressure sensor 2, and compare it with the given parameters through calculation to change the frequency of the inverter. 3 output frequencies. If the pressure is not enough, the frequency will increase. After reaching 50HZ, the PLC will control the water pump to operate at power frequency, and perform frequency conversion on the other water pump. The output frequency of the frequency converter will gradually increase until the water pressure reaches the given pressure. The pumping process is sequential By analogy; if the water consumption decreases, the control process is just the opposite of the above process. If the power supply fails, the system will stop, and the system will automatically resume operation after the power supply returns to normal.

The frequency converter 3 controls the running speed of the water pump by changing the output voltage and frequency, so as to smoothly change the water supply volume and provide energy-saving water supply with variable flow rate under the premise of ensuring the pressure. The fault control module 10 is provided with 30 fault switches. When a certain switch is activated, the corresponding fault point can be set to cause a man-made fault in the system. The practitioner should analyze the fault phenomenon to find the fault range and finally eliminate the fault. .

Claims (4)

1. Constant pressure water supply teaching and training device, including constant pressure water supply control module, actuator and power distribution cabinet. The constant pressure water supply control module is equipped with pressure sensor, frequency converter, PLC and converter. The converter includes contactor and relay. The actuator includes water pumps, water tanks, connecting water pipes and valves for adjusting water pressure; the pressure sensor transmits the pressure signal to the frequency converter, and the frequency converter outputs the signal of adding or decreasing the pump to the PLC according to the pressure signal, and the PLC controls the contact The action of the contactor, and then the operation of the water pump is controlled by the contactor. It is characterized in that: there is also a fault control module electrically connected to the frequency converter, PLC, converter and power distribution cabinet. The fault control module includes several switches and corresponding connecting lines. 2. The constant pressure water supply teaching and training device according to claim 1, characterized in that: said fault control module is also provided with a fault indicator light associated with the switch. 3. The constant pressure water supply teaching and training device according to claim 1 or 2, characterized in that: a monitoring system is also electrically connected to the PLC, and the monitoring system includes an application configuration software module to monitor and observe the operating status of the equipment . 4. The constant pressure water supply teaching and training device according to claim 1 or 2, characterized in that: the power distribution cabinet is provided with a switch and a manual button to form an automatic or manual control.

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