CN116201202A - Control system of fully-integrated digital variable-frequency water supply equipment - Google Patents

Abstract

The invention relates to a control system of a fully integrated digital variable frequency water supply device, wherein a first three-phase four-wire power supply is connected with a wiring terminal of a first load switch, a second three-phase four-wire power supply is connected with a wiring terminal of a second load switch, and the wiring terminals of the first load switch and the second load switch are both connected with a wiring terminal of a power supply conversion part; the outlet end of the power supply conversion component is connected with a first circuit breaker, the first circuit breaker is connected with a first frequency converter, and the outlet end of the first frequency converter is connected with a first water pump; the outlet end of the power supply conversion part is connected with a second circuit breaker, the second circuit breaker is connected with a second frequency converter, and the outlet end of the first frequency converter is connected with a second water pump; the outlet end of the power supply conversion component is connected with a third circuit breaker, the third circuit breaker is connected with a third frequency converter, and the outlet end of the third frequency converter is connected with a third water pump. Compared with the prior art, the invention has the advantages of high safety, high compatibility and the like.

Description

A fully integrated digital frequency conversion water supply equipment control system

technical field

The invention relates to the field of circulating water pump control, in particular to a fully integrated digital frequency conversion water supply equipment control system.

Background technique

At present, there are various kinds of frequency conversion water supply control systems available to meet the needs of various users. With the development of industrialization and urbanization, the control system of circulating water pumps is increasingly required to be automated, intelligent and informatized.

At present, most of them can meet the general control requirements, but there are also some shortcomings:

(a) Poor compatibility: For pumps with different starting methods, due to the different wiring of the main circuit of the pump control, different control cabinets are required to control, and the compatibility is poor;

(b) The degree of intelligence is not high: the operating parameters and fault information are not recorded.

Contents of the invention

The purpose of the present invention is to provide a fully integrated digital frequency conversion water supply equipment control system with high safety and compatibility in order to overcome the defect of poor compatibility in the above-mentioned prior art.

The purpose of the present invention can be achieved through the following technical solutions:

A fully integrated digital frequency conversion water supply equipment control system, including a first three-phase four-wire power supply, a second three-phase four-wire power supply, power conversion components, a first frequency converter, a second frequency converter, a third frequency converter, and a first water pump , the second water pump and the third water pump;

The first three-phase four-wire power supply is connected to the terminal of the first load switch, the second three-phase four-wire power supply is connected to the terminal of the second load switch, and the terminals of the first load switch and the second load switch The outlet ends are all connected to the inlet ends of the power conversion components;

The outlet end of the power conversion component is connected to a first circuit breaker, the first circuit breaker is connected to the first frequency converter, and the outlet end of the first frequency converter is connected to the first water pump; the outlet end of the power conversion component is connected to There is a second circuit breaker, the second circuit breaker is connected to the second frequency converter, the outlet end of the first frequency converter is connected to the second water pump; the outlet end of the power conversion component is connected to a third circuit breaker, the first frequency converter is connected to the second water pump; The three circuit breakers are connected to the third frequency converter, and the outlet end of the third frequency converter is connected to the third water pump.

Further, the system also includes a switching power supply, an outlet pressure detection transmitter, an inlet pressure detection transmitter and a programmable controller;

The inlet end of the switching power supply is connected to the outlet end of the power conversion component, the outlet end of the switching power supply is connected to the outlet pressure detection transmitter, the inlet pressure detection transmitter and the programmable controller, and the outlet pressure detection transmitter Both the transmitter and the inlet pressure detection transmitter are connected to a programmable controller, and the programmable controller is connected to the first frequency converter, the second frequency converter and the third frequency converter.

Further, a first fuse is provided between the connecting power conversion component and the switching power supply, the incoming terminal of the first fuse is connected to the outgoing terminal of the power converting component, and the outgoing terminal with the first fuse is connected to The input terminal of the switching power supply.

Further, an emergency stop button is provided between the first fuse and the switching power supply, one end of the emergency stop button is connected to the outlet end of the first fuse, and the other end is connected to the inlet end of the switching power supply.

Further, the outlet end of the first fuse is connected to a power indicator light, and the other end of the power indicator light is connected to a neutral wire.

Further, the switching power supply is also connected to a water tank liquid level detection transmitter and a touch screen, the power supply end of the water tank liquid level detection transmitter is connected to the outlet end of the switching power supply, and the power supply end of the touch screen is connected to the switching power supply At the outlet end, the water tank liquid level detection transmitter and the touch screen are connected to the programmable controller.

Further, the programmable controller includes a programmable controller analog expansion module, the input end of the programmable controller analog expansion module is connected to the outlet pressure detection transmitter, the inlet pressure detection transmitter and the water tank liquid level The detection transmitter is connected to the output end of the first frequency converter, the second frequency converter and the third frequency converter.

Further, a second fuse is provided between the switching power supply and the programmable controller, the programmable controller includes a DC power supply, and the DC power supply is connected with an automatic conversion switch and a silencer button, and the automatic conversion switch Both the button and the mute button are connected to the input terminal of the programmable controller.

Further, the programmable controller is also connected with a system ready indicator light and a comprehensive fault audible and visual alarm, one end of the system ready indicator light and the comprehensive fault audible and visual alarm is connected to the output end of the programmable controller, and the other Connect one end to the neutral wire.

Further, the system further includes a first circuit breaker, a second circuit breaker and a third circuit breaker, the power conversion components are respectively connected to the incoming terminals of the first circuit breaker, the second circuit breaker and the third circuit breaker, and the The outlet end of the first circuit breaker is connected to the first frequency converter, the first frequency converter of the second circuit breaker and the first frequency converter of the third circuit breaker.

Compared with the prior art, the present invention has the following advantages:

(1) In this scheme, the first three-phase four-wire power supply and the second three-phase four-wire power supply are connected to the power conversion unit, the power conversion unit is connected to multiple frequency converters, and each frequency converter is connected to the corresponding water pump, combined with the programmable controller to realize The control of water pumps with different starting methods has better compatibility and a high degree of integration.

(2) In this scheme, the first fuse and emergency stop button are set between the power conversion part and the switching power supply, and the second fuse is set between the switching power supply and the programmable controller to realize safety protection such as overheating and overloading of the circuit. At the same time, the setting of the emergency stop button can effectively prevent further damage to the device due to faults and improve the safety of the device.

(3) In this scheme, the operating parameters can be displayed and set through the panel of the frequency converter, and the operating parameters and fault information can be memorized and stored.

(4) In this solution, the programmable controller is equipped with a remote interface, which is connected to the control center through the remote interface, so that the control center can monitor the status of the equipment in real time, receive instructions from the control center, complete the control of related equipment, and reduce product costs.

Description of drawings

Fig. 1 is the electrical schematic diagram of the primary circuit provided by the present invention;

Fig. 2 is the electrical schematic diagram of the secondary circuit provided by the present invention;

Fig. 3 is the electrical schematic diagram of the intelligent control circuit provided by the present invention;

Description of drawings: QS01, the first load switch, QS02, the second load switch, ATS, dual power conversion components, Q11, the first circuit breaker, QF13, the third circuit breaker, FC1, the first frequency converter, FC3, the third Inverter, FU1, first fuse, FU2, second fuse, HL1, first indicator light, HL2, second indicator light, HA, sound and light alarm, SA1, transfer switch, PLC, programmable controller, EM, programmable controller analog expansion module, SB CMO1, RS485 are communication expansion boards, HMI, touch screen, S, switching power supply DC24V, PT1, outlet pressure detection transmitter. PT2, imported pressure detection transmitter, LT1, water tank liquid level detection transmitter.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

Example 1

This embodiment provides a fully integrated digital frequency conversion water supply equipment control system, including a first three-phase four-wire power supply, a second three-phase four-wire power supply, power conversion components, a first frequency converter, a second frequency converter, and a third frequency converter , the first water pump, the second water pump and the third water pump;

The first three-phase four-wire power supply is connected to the terminal of the first load switch, the second three-phase four-wire power supply is connected to the terminal of the second load switch, and the outlet terminals of the first load switch and the second load switch are connected to the power conversion The incoming line end of the component;

The outlet end of the power conversion component is connected to the first circuit breaker, the first circuit breaker is connected to the first inverter, the outlet end of the first inverter is connected to the first water pump; the outlet end of the power conversion component is connected to the second circuit breaker, and the second The circuit breaker is connected to the second inverter, the outlet end of the first inverter is connected to the second water pump; the outlet end of the power conversion component is connected to the third circuit breaker, the third circuit breaker is connected to the third inverter, and the outlet end of the third inverter Connect the third water pump.

The system also includes switching power supply, outlet pressure detection transmitter, inlet pressure detection transmitter and programmable controller;

The inlet end of the switching power supply is connected to the outlet end of the power conversion component, the outlet end of the switching power supply is connected to the outlet pressure detection transmitter, the inlet pressure detection transmitter and the programmable controller, the outlet pressure detection transmitter and the inlet pressure detection transmitter The transmitters are all connected to the programmable controller, and the programmable controller is connected to the first frequency converter, the second frequency converter and the third frequency converter.

The first three-phase four-wire power supply and the second three-phase four-wire power supply are connected to the power conversion unit, the power conversion unit is connected to multiple frequency converters, each frequency converter is connected to the corresponding water pump, and combined with the programmable controller to realize the water pumps with different starting methods The control has better compatibility and a high degree of integration.

A first fuse is provided between the power conversion unit and the switching power supply, the incoming line end of the first fuse is connected to the outgoing line end of the power conversion unit, and the outgoing line end of the first fuse is connected to the incoming line end of the switching power supply.

An emergency stop button is arranged between the first fuse and the switching power supply, one end of the emergency stop button is connected to the outlet end of the first fuse, and the other end is connected to the inlet end of the switching power supply.

The outlet end of the first fuse is connected with a power indicator light, and the other end of the power indicator light is connected with a neutral wire.

The first fuse and the emergency stop button are set between the power conversion part and the switching power supply, and the second fuse is set between the switching power supply and the programmable controller to realize safety protection against overheating and overloading of the circuit. At the same time, the setting of the emergency stop button, It can effectively prevent further damage to the device due to a fault, and improve the safety of the device.

The switching power supply is also connected with a water tank liquid level detection transmitter and a touch screen. The power supply end of the water tank liquid level detection transmitter is connected to the outlet end of the switching power supply. Both the controller and the touch screen are connected to the programmable controller.

The programmable controller includes a programmable controller analog expansion module, the input end of the programmable controller analog expansion module is connected to the outlet pressure detection transmitter, the inlet pressure detection transmitter and the water tank liquid level detection transmitter, and the output end Connect the first frequency converter, the second frequency converter and the third frequency converter.

There is a second fuse between the switching power supply and the programmable controller. The programmable controller includes a DC power supply. The DC power supply is connected to an automatic transfer switch and a silencer button. Both the automatic transfer switch and the silencer button are connected to the input of the programmable controller. end.

The programmable controller is also connected with a system ready indicator light and a comprehensive fault audible and visual alarm. One end of the system ready indicator light and the comprehensive fault audible and visual alarm is connected to the output end of the programmable controller, and the other end is connected to the neutral line.

The system also includes a first circuit breaker, a second circuit breaker and a third circuit breaker, the power conversion components are respectively connected to the incoming line ends of the first circuit breaker, the second circuit breaker and the third circuit breaker, and the outgoing line ends of the first circuit breaker Connect the first inverter, the second circuit breaker first inverter and the third circuit breaker first inverter.

This embodiment also provides the specific implementation process of the fully integrated digital frequency conversion water supply equipment control system, as shown in Figure 1, including two three-phase four-wire power supplies (AC380V/50Hz) respectively connected to the first load switch QS01 and the second load switch QS02 incoming line terminal; the first load switch QS01 is connected to the common electric incoming line end of the dual power supply conversion part ATS, and the outgoing line of the second load switch QS02 is connected to the standby electric incoming line end of the dual power supply conversion part ATS;

The dual power conversion part ATS is connected to the dual power control display, and the outlet terminals of the dual power conversion part ATS are respectively connected to the inlet terminals of the first circuit breaker QF11, the second circuit breaker QF12 and the third circuit breaker QF13; the outlet of the first circuit breaker QF11 is connected to the The incoming line terminal of the first inverter FC1, the outgoing line end of the first inverter FC1 is connected to the terminal of the first water pump; the outgoing line of the second circuit breaker QF12 is connected to the incoming line end of the second inverter FC2, and the outgoing line terminal of the second inverter FC2 is connected to The connection terminal of the second water pump; the outgoing line of the third circuit breaker QF13 is connected to the incoming line terminal of the third frequency converter FC3, and the outgoing line terminal of the third frequency converter FC3 is connected to the terminal of the third water pump.

Further, as shown in FIG. 2 , in this control system, the outlet end of the dual power conversion unit ATS is connected to the first fuse FU1 , and the first fuse FU1 is respectively connected to the power indicator HL1 and the emergency stop button ST. The emergency stop button ST is connected to the switching power supply S, the other end of the power indicator HL1 and the switching power supply S is connected to the neutral wire; the positive pole of the switching power supply S is respectively connected to the outlet pressure detection transmitter PT1, the inlet pressure detection transmitter PT2, and the water tank liquid level Detect the power supply terminal of transmitter LT1 and touch screen HMI.

Furthermore, as shown in Figure 3, the emergency stop button ST is connected to the second fuse FU2, the second fuse FU2 is connected to the power supply terminal of the programmable controller PLC, and the DC power output terminal L+M of the programmable controller PLC itself Take over the automatic conversion switch SA1, the silencer button SB1 and the programmable controller analog expansion module EM respectively; the manual automatic conversion switch SA1 is respectively connected to the first input terminal I0. The second input terminal I0.1; the mute button SB1 is connected to the third input terminal I0.2 of the programmable controller PLC; the first output terminal Q0.0 of the programmable controller PLC is connected to the system ready indicator HL2, and the programmable controller PLC The second output terminal Q0.1 is connected to the comprehensive fault sound and light alarm HA, and is connected to the system ready indicator HL2 and the comprehensive fault sound and light alarm HA to the neutral line.

The programmable controller PLC is connected to the touch screen HMI through the RJ45 Ethernet to perform data exchange and transmission; the programmable controller PLC is connected to the first frequency converter FC1, the second frequency converter FC2 and the third frequency converter FC3 through the RS485 communication line respectively to perform data exchange. Data exchange and transmission; the programmable controller PLC communicates with the outside through RS485 communication line through its own expansion card SB CMO1.

The first positive input terminal 0+ of the programmable controller analog expansion module EM is connected to the outlet pressure detection transmitter PT1, and the second positive input terminal 1+ of the programmable controller analog expansion module EM is connected to the inlet pressure detection transmitter PT2, the first negative input terminal 0- of the programmable controller analog expansion module EM, the second negative input terminal 1- of the programmable controller analog expansion module EM, the third negative input terminal of the programmable controller analog expansion module EM The negative input terminal 2- is respectively connected to the negative terminal V- of the switching power supply S; the first analog output terminal 0M 0 of the programmable controller analog expansion module EM is respectively connected to the analog signal input terminals A0 0V and 0V of the first frequency converter FC1 The analog signal input terminal A0 of the second frequency converter FC2 is 0V, and the analog signal input terminal A0 of the third frequency converter FC3 is 0V.

The specific operation steps of this system are as follows

(a) Firstly close the first load switch QS01 and the second load switch QS02 of the control cabinet, close the circuit breakers QF11~QF13, close the fuses FU1~FU2, and the control cabinet is in the power-on state.

(b) Select the remote/local state of the system through the changeover switch SA1, and set relevant parameters on the screens of the frequency converters FC1~FC3 and the touch screen HMI.

(c) If the control system is in the manual state, the manual control and debugging of the water pump can be completed through the operation interface on the touch screen HMI.

(d) If the control system is in the automatic state, the parameters set on the touch screen HMI will be compared with the data of the outlet pressure detection transmitter PT1, the inlet pressure detection transmitter PT2, and the water tank liquid level detection transmitter LT1. The programmable controller is controlled by the preset program, and the status of the system equipment is communicated to the remote control center through the RS485 on the expansion card SB CMO1 of the programmable controller itself in real time.

(e) If the control system is in the automatic state, the remote control center can also remotely control the system according to the overall situation. The remote control center communicates with the programmable controller through the RS485 on the expansion card SB CMO1 of the programmable controller itself. Control and monitor.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (10)

1. A fully integrated digital frequency conversion water supply equipment control system, characterized in that it includes a first three-phase four-wire power supply, a second three-phase four-wire power supply, power conversion components, a first frequency converter, a second frequency converter, a third Frequency converter, first water pump, second water pump and third water pump; The first three-phase four-wire power supply is connected to the terminal of the first load switch, the second three-phase four-wire power supply is connected to the terminal of the second load switch, and the terminals of the first load switch and the second load switch The outlet ends are all connected to the inlet ends of the power conversion components; The outlet end of the power conversion component is connected to a first circuit breaker, the first circuit breaker is connected to the first frequency converter, and the outlet end of the first frequency converter is connected to the first water pump; the outlet end of the power conversion component is connected to There is a second circuit breaker, the second circuit breaker is connected to the second frequency converter, the outlet end of the first frequency converter is connected to the second water pump; the outlet end of the power conversion component is connected to a third circuit breaker, the first frequency converter is connected to the second water pump; The three circuit breakers are connected to the third frequency converter, and the outlet end of the third frequency converter is connected to the third water pump. 2. A fully integrated digital frequency conversion water supply equipment control system according to claim 1, characterized in that the system also includes a switching power supply, an outlet pressure detection transmitter, an inlet pressure detection transmitter and a programmable controller; The inlet end of the switching power supply is connected to the outlet end of the power conversion component, the outlet end of the switching power supply is connected to the outlet pressure detection transmitter, the inlet pressure detection transmitter and the programmable controller, and the outlet pressure detection transmitter Both the transmitter and the inlet pressure detection transmitter are connected to a programmable controller, and the programmable controller is connected to the first frequency converter, the second frequency converter and the third frequency converter. 3. A fully integrated digital frequency conversion water supply equipment control system according to claim 2, characterized in that, a first fuse is provided between the connecting power conversion part and the switching power supply, and the further part of the first fuse is The wire end is connected to the outlet end of the power conversion component, and the outlet end with the first fuse is connected to the inlet end of the switching power supply. 4. A fully integrated digital frequency conversion water supply equipment control system according to claim 3, characterized in that an emergency stop button is provided between the first fuse and the switching power supply, and one end of the emergency stop button is connected to the first The outlet end of a fuse, and the other end is connected to the input end of the switching power supply. 5. A fully integrated digital frequency conversion water supply equipment control system according to claim 3, characterized in that the outlet end of the first fuse is connected to a power indicator light, and the other end of the power indicator light is connected to a neutral Wire. 6. A fully integrated digital frequency conversion water supply equipment control system according to claim 2, characterized in that the switching power supply is also connected with a water tank liquid level detection transmitter and a touch screen, and the water tank liquid level detection transmitter The power supply end of the device is connected to the outlet end of the switching power supply, the power supply end of the touch screen is connected to the outlet end of the switching power supply, and the water tank liquid level detection transmitter and the touch screen are both connected to the programmable controller. 7. A fully integrated digital frequency conversion water supply equipment control system according to claim 6, wherein the programmable controller includes a programmable controller analog expansion module, and the programmable controller analog expansion module The input end is connected to the outlet pressure detection transmitter, the inlet pressure detection transmitter and the water tank liquid level detection transmitter, and the output end is connected to the first frequency converter, the second frequency converter and the third frequency converter. 8. A fully integrated digital frequency conversion water supply equipment control system according to claim 2, characterized in that a second fuse is provided between the switching power supply and the programmable controller, and the programmable controller includes a DC Power supply, the DC power supply is connected with an automatic transfer switch and a silencer button, and the automatic transfer switch and the silencer button are both connected to the input end of the programmable controller. 9. A fully integrated digital frequency conversion water supply equipment control system according to claim 2, characterized in that the programmable controller is also connected with a system ready indicator light and a comprehensive fault sound and light alarm, and the system ready indicator One end of the lamp and the comprehensive fault sound and light alarm are connected to the output end of the programmable controller, and the other end is connected to the neutral wire. 10. A fully integrated digital frequency conversion water supply equipment control system according to claim 1, characterized in that the system further comprises a first circuit breaker, a second circuit breaker and a third circuit breaker, and the power conversion components are respectively connected to The incoming terminals of the first circuit breaker, the second circuit breaker and the third circuit breaker, the outgoing terminal of the first circuit breaker is connected with the first inverter, the first inverter of the second circuit breaker and the first inverter of the third circuit breaker device.

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