CN214669474U - Intelligent relay checking platform based on PLC - Google Patents

Abstract

An intelligent relay calibration platform based on a PLC comprises a calibration power input unit (1), wherein the calibration power input unit (1) is electrically connected with a relay base set unit (2), the relay base set unit (2) is electrically connected with a signal acquisition and processing unit (4), and the signal acquisition and processing unit (4) is electrically connected with a PLC component power supply unit (3) and a signal output unit (5) respectively; the utility model can check the relays with various voltage grades, different voltage types and multiple butt joints at the same time; the real-time states of all the contacts of all the relays can be displayed in the touch screen picture, so that the conditions of the relays can be conveniently judged; the checking result can be exported and printed, so that the operation by one person is convenient; the checking efficiency is greatly improved.

Description

Intelligent relay checking platform based on PLC

Technical Field

The utility model belongs to calibration equipment field, in particular to intelligence relay calibration platform based on PLC.

Background

A relay is an electric control device that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount (excitation amount) meets a predetermined requirement. It has an interactive relationship between a control system (also called an input loop) and a controlled system (also called an output loop). It is commonly used in automation control circuits, which are actually a kind of "recloser" that uses a small current to control a large current operation. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. In secondary equipment of a hydraulic power plant, a large number of relays of different brands and different models are used, and periodic verification is needed to ensure that the state of the relays is normal. Taking a hydraelectric power plant in a white crane beach as an example, 16 huge hydroelectric generating sets with the capacity of 100 kilo-kilowatts are installed, and as for equipment managed by automatic division, each set has nearly 700 relays, and each round of repair costs a great deal of manpower, material resources and financial resources to carry out relay check work.

The conventional relay verification mainly checks the following indexes: coil resistance, operating voltage, return voltage, whether the normally open contact and the normally closed contact operate normally, and the like. The conventional measurement method comprises the following steps: the method comprises the steps of firstly measuring coil resistance by using a universal meter, then testing action voltage and return voltage of the relay by using a relay protection instrument, and then detecting the contact closing condition of the relay by using a universal meter. Generally, the number of the contacts of the relay is large, and if only one of the contacts is verified, the reliability of other contacts cannot be guaranteed. Therefore, it is necessary to verify all the contacts of the relay. However, if all the contacts of the relay are verified, multiple tests are needed to be performed, and a large amount of time is consumed in the whole process and great safety risks are brought. Therefore, how to improve the efficiency of relay calibration, reduce workload and working time is a problem that needs to be solved urgently, and a calibration device for calibrating a relay with high efficiency is actually needed.

Disclosure of Invention

In view of the technical problems existing in the background art, the utility model provides an intelligent relay calibration platform based on PLC, can calibrate the relay of multiple voltage class, different voltage types, many butt joints simultaneously; the real-time states of all the contacts of all the relays can be displayed in the touch screen picture, so that the conditions of the relays can be conveniently judged; the checking result can be exported and printed, so that the operation by one person is convenient; the checking efficiency is greatly improved.

In order to solve the technical problem, the utility model discloses following technical scheme has been taken and has been realized:

an intelligent relay calibration platform based on a PLC comprises a calibration power input unit, wherein the calibration power input unit is electrically connected with a relay base group unit, the relay base group unit is electrically connected with a signal acquisition and processing unit, and the signal acquisition and processing unit is respectively electrically connected with a PLC component power supply unit and a signal output unit;

the relay base group unit comprises relay bases with various voltage grades, and the relay bases are used for mounting relays to be verified;

the checking power supply input unit is used for providing power supplies with different voltage levels for the relay;

the signal acquisition and processing unit is used for acquiring and processing the on-off signals of the coil resistor and the contact of the relay;

the signal output unit is used for information display.

In a preferred scheme, the verification power supply input unit comprises a relay protection tester, and the relay protection tester is electrically connected with the power supply selection module.

In a preferred scheme, the relay base group unit comprises a DC24V relay base group, an AC220V relay base group and a DC220V relay base group.

In a preferred scheme, the signal acquisition and processing unit comprises a power module, a CPU module, a switching value input module DI group and an analog value input module AI group.

In a preferred embodiment, the PLC component power supply unit includes an AC220V power input and a 24V switching power supply, and is configured to provide 24VDC power to the power supply module, the CPU module, the switching value input module DI group, and the analog value input module AI group.

In a preferred embodiment, the signal output unit is a touch screen, and the touch screen is provided with three functional areas, wherein the three functional areas are an "input amount list", an "mold input amount list" and an "event list", respectively.

This patent can reach following beneficial effect:

1. the relay with multiple voltage grades, different voltage types and multiple pairs of contacts can be verified simultaneously;

2. the action voltage value and the return voltage value of each pair of contact points and the coil resistance can be recorded;

3. PLC operation is adopted, and PLC modules, touch screen pictures and events are subjected to multiple automatic prompts, so that prompt is clear;

4. the real-time states of all the contacts of all the relays can be displayed in the touch screen picture, so that the conditions of the relays can be conveniently judged; the checking result can be exported and printed, so that the operation by one person is convenient; the checking efficiency is greatly improved.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a module connection diagram of the present invention.

In the figure: 1-checking a power input unit; 2-a relay base group unit; 3-a PLC component power supply unit; 4-a signal acquisition processing unit; 5-a signal output unit; 1.1-relay protection tester; 1.2 a power supply selection module; 2.1-DC24V relay base group; 2.2AC220V relay base group; 2.3-DC220V relay base group; 3.1-AC220V power input; 3.2-DC24V switching power supply; 4.1-power module; 4.2-CPU module; 4.3-switching value input module DI group; 4.4 analog input module AI group.

Detailed Description

A preferred scheme is as shown in fig. 1, the intelligent relay calibration platform based on the PLC comprises a calibration power input unit 1, the calibration power input unit 1 is electrically connected with a relay base set unit 2, the relay base set unit 2 is electrically connected with a signal acquisition and processing unit 4, and the signal acquisition and processing unit 4 is electrically connected with a PLC component power supply unit 3 and a signal output unit 5 respectively;

the checking power supply input unit 1 is used for providing power supplies with different voltage levels for the relay;

the signal acquisition and processing unit 4 is used for acquiring and processing the on-off signals of the coil resistor and the contact of the relay;

the signal output unit 5 is used for information display.

Further, the verification power input unit 1 comprises a relay protection tester 1.1, and the relay protection tester 1.1 is electrically connected with the power selection module 1.2.

Further, the relay base set unit 2 includes a DC24V relay base set 2.1, an AC220V relay base set 2.2, and a DC220V relay base set 2.3.

Further, the signal acquisition and processing unit 4 includes a power module 4.1, a CPU module 4.2, a switching value input module DI group 4.3, and an analog value input module AI group 4.4.

Further, the PLC component power supply unit 3 includes AC220V power input 3.1 and 24V switching power supply 3.2, and the PLC component power supply unit 3 is configured to provide 24VDC power to the power supply module 4.1, the CPU module 4.2, the switching value input module DI group 4.3, and the analog value input module AI group 4.4.

Further, the signal output unit 5 is a touch panel provided with three functional areas, which are an "input amount list", an "mold amount list", and an "event list", respectively. After the verification is finished, the verification result in the touch screen can be exported and printed.

The relay protection tester 1.1 and the relay base are connected by a plurality of strands of copper core wires; all the switching value contacts on all the relay bases are connected with a terminal row of a measuring point of a DI group of a switching value input module of the PLC component through the terminal row; a resistance contact of a coil of the relay base is connected with an analog quantity input module AI measuring point terminal row of the PLC component through a resistance-to-current signal transmitter; and a serial port line is connected between the CPU module and the touch screen in the PLC component.

The working principle is as follows:

when the relay checking platform is used, according to the checked relay type, the relay protection tester is used for outputting the corresponding voltage grade and the corresponding voltage type, corresponding air switches and PLC components are closed, a power supply of a touch screen is arranged, the output voltage of the relay protection tester is set to be continuously increased by 0.1V, when the input voltage reaches the action value of a certain relay, normally open contacts are closed, normally closed contacts are disconnected, corresponding contacts of a switch quantity input module on the PLC component can be lightened, an indicator lamp can be lightened after related variables in a touch screen input quantity list, the real-time states of all contacts of the relay in the list can be clearly displayed, and action events of the contacts can be displayed in an event list. After the verification is finished, the verification result in the touch screen can be exported and printed.

The technical scheme has the following module options:

selecting Schneider BMXCPS3020 as a CPS power supply module;

selecting Schneider BMEP581020 by the CPU;

the DI module selects schneider BMXDDI 6402K;

the AI module selects Schneider BMXAMI 0810;

the signal output unit schneider HMIST 6700.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (6)

1. The utility model provides an intelligent relay check platform based on PLC which characterized in that: the device comprises a verification power supply input unit (1), wherein the verification power supply input unit (1) is electrically connected with a relay base group unit (2), the relay base group unit (2) is electrically connected with a signal acquisition and processing unit (4), and the signal acquisition and processing unit (4) is electrically connected with a PLC (programmable logic controller) component power supply unit (3) and a signal output unit (5) respectively;

the relay base group unit (2) comprises relay bases with various voltage grades, and the relay bases are used for mounting relays to be verified;

the checking power supply input unit (1) is used for providing power supplies with different voltage levels for the relay;

the signal acquisition and processing unit (4) is used for acquiring and processing on-off signals of the coil resistor and the contact of the relay;

the signal output unit (5) is used for information display.

2. The PLC-based intelligent relay verification platform of claim 1, wherein: the verification power supply input unit (1) comprises a relay protection tester (1.1), and the relay protection tester (1.1) is electrically connected with the power supply selection module (1.2).

3. The PLC-based intelligent relay verification platform of claim 1, wherein: the relay base group unit (2) comprises a DC24V relay base group (2.1), an AC220V relay base group (2.2) and a DC220V relay base group (2.3).

4. The PLC-based intelligent relay verification platform of claim 1, wherein: the signal acquisition and processing unit (4) comprises a power module (4.1), a CPU module (4.2), a switching value input module DI group (4.3) and an analog value input module AI group (4.4).

5. The PLC-based intelligent relay verification platform of claim 4, wherein: the PLC component power supply unit (3) comprises an AC220V power supply input (3.1) and a 24V switching power supply (3.2), and the PLC component power supply unit (3) is used for providing 24VDC power for a power supply module (4.1), a CPU module (4.2), a switching value input module DI group (4.3) and an analog value input module AI group (4.4).

6. The PLC-based intelligent relay verification platform of claim 1, wherein: the signal output unit (5) is a touch screen which is provided with three functional areas, wherein the three functional areas are an input amount list, a mode input amount list and an event list respectively.

Images