CN201347852Y

CN201347852Y - Three-air compressor interlock actuating PLC control device

Info

Publication number: CN201347852Y
Application number: CNU2009200508704U
Authority: CN
Inventors: 张旭东
Original assignee: UPC GROUP
Current assignee: UPC GROUP
Priority date: 2009-01-22
Filing date: 2009-01-22
Publication date: 2009-11-18
Anticipated expiration: 2019-01-22

Abstract

The utility model discloses a three-air compressor interlock actuating PLC control device, which comprises a failure detection input unit of a first air compressor, a failure detection input unit of a second air compressor, a failure detection input unit of a third air compressor, a CPU (computer processing unit), a first control output unit, a first timing start unit, a second control output unit, a second timing start unit, a third control output unit, a third timing start unit, and a power supply unit. The utility model aims to provide a three-air compressor interlock actuating PLC control device which is reasonable in structural design and has the capacity to start up a standby unit in good time.

Description

A kind of PLC control gear of three air compressor chain promoters

[technical field]

The utility model relates to a kind of PLC control gear of three air compressor chain promoters.

[background technique]

At present, pressurized air supply design proposal mostly is greatly: " dual-purpose one is equipped with " be totally three spiral air compressors, and present design is when a certain operation air compressor fault, and standby unit can not in time start, and causes the continuity production line to jump car.For guaranteeing production safety, standby unit just adopts in service standby always, and standby unit operation year inaction power consumption increases equipment failure rate and maintenance cost simultaneously up to 240,000 degree (three one-tenth of rated power).

[model utility content]

The utility model has overcome the deficiency of above-mentioned technology, a kind of reasonable in design is provided, can have in time started the PLC control gear of three air compressor chain promoters of standby unit.

For achieving the above object, the utility model has adopted following technical proposal:

A kind of PLC control gear of three air compressor chain promoters is characterized in that including:

One first air compressor faut detection input unit will be passed to CPU from that detected no cold lack of water signal of first air compressor, exhaust high temperature signal, electrical failure signal;

One second air compressor faut detection input unit will be passed to CPU from that detected no cold lack of water signal of second air compressor, exhaust high temperature signal, electrical failure signal;

The 3rd an air compressor faut detection input unit will be passed to CPU from that detected no cold lack of water signal of the 3rd air compressor, exhaust high temperature signal, electrical failure signal;

A CPU, behind any one signal in the three kinds of signals of no cold lack of water signal, exhaust high temperature signal, electrical failure signal that receive the output of air compressor faut detection input unit, just confirm to break down with the corresponding air compressor of this air compressor faut detection input unit;

One first control output unit when first air compressor breaks down, is exported out-of-work signal to first air compressor, and to the first timing start unit output actuating signal;

One first timing start unit sends start timing signal to second air compressor, the 3rd air compressor after the actuating signal of its reception first control output unit;

One second control output unit when second air compressor breaks down, is exported out-of-work signal to second air compressor, and to the second timing start unit output actuating signal;

One second timing start unit sends start timing signal to first air compressor, the 3rd air compressor after the actuating signal of its reception second control output unit;

One the 3rd control output unit when the 3rd air compressor breaks down, is exported out-of-work signal to the 3rd air compressor, and to the 3rd timing start unit output actuating signal;

One the 3rd start unit regularly, it sends start timing signal to first air compressor, second air compressor after receiving the actuating signal of the 3rd control output unit;

A power subsystem, converting ac power supply to DC electrical source is the foregoing circuit power supply.

Compared with prior art, the beneficial effects of the utility model are:

When 1, adopting the utility model to control three air compressors, can be with any wherein two air compressors as using unit, and will left in an air compressor as standby unit, when any one abnormal problem such as no-cooling-water, exhaust high temperature, electrical failure occurs when two air compressors that use, by control of the present utility model, can under the situation of dispense with parking, just can start standby unit smoothly, reach the purpose of the standby unit of timely startup, guarantee the continuity of work, guarantee production safety.

When 2, adopting the utility model to control three air compressors, it is in service standby to avoid standby unit to adopt always, avoids standby unit operation year inaction power consumption, has reduced equipment failure rate and maintenance cost.

[description of drawings]

Fig. 1 is a skeleton diagram of the present utility model.

[embodiment]

Be described in further detail below in conjunction with accompanying drawing and mode of execution of the present utility model:

Referring to Fig. 1, the utility model is a kind of PLC control gear of three air compressor chain promoters, and it includes: one first air compressor faut detection input unit 1, second air compressor faut detection input unit 2, the 3rd air compressor faut detection input unit 3, CPU, one first control output unit 4, one first regularly start unit 5, one second control output unit 6, one second regularly start unit 7, one the 3rd control output unit 8, one the 3rd regularly start unit 9, a power subsystem 10.

Described first air compressor faut detection input unit 1 can detect no cold lack of water signal, exhaust high temperature signal, electrical failure signal from first air compressor, and these three kinds of signals are passed to CPU;

Described second air compressor faut detection input unit 2 can detect no cold lack of water signal, exhaust high temperature signal, electrical failure signal from second air compressor, and these three kinds of signals are passed to CPU;

Described the 3rd air compressor faut detection input unit 3 can detect no cold lack of water signal, exhaust high temperature signal, electrical failure signal from the 3rd air compressor, and these three kinds of signals are passed to CPU;

Behind described CPU any one signal in the three kinds of signals of no cold lack of water signal, exhaust high temperature signal, electrical failure signal that receive above three air compressor faut detection input units output, just confirm to break down with the corresponding air compressor of this air compressor faut detection input unit.

The described first control output unit 4 is when first air compressor breaks down, under the control of CPU, export out-of-work signal to first air compressor, first air compressor quit work at once, and the first control output unit 4 is simultaneously to the first timing start unit, 5 output actuating signals; This first regularly start unit 5 send start timing signal to second air compressor, the 3rd air compressor after receiving the actuating signal of the first control output unit 4, second air compressor, the 3rd air compressor were started in the time of setting, if second air compressor, the 3rd air compressor do not start in the time of setting, the control signal that the first timing start unit 5 sends just no longer works, and prevents that second air compressor, the 3rd air compressor also are in fault state.

The described second control output unit 6 is when second air compressor breaks down, under the control of CPU, export out-of-work signal to second air compressor, second air compressor quit work at once, and the second control output unit 6 is simultaneously to the second timing start unit, 7 output actuating signals; This second regularly start unit 7 send start timing signal to first air compressor, the 3rd air compressor after receiving the actuating signal of the second control output unit 6, first air compressor, the 3rd air compressor were started in the time of setting, if first air compressor, the 3rd air compressor do not start in the time of setting, the control signal that the second timing start unit 7 sends just no longer works, and prevents that first air compressor, the 3rd air compressor also are in fault state.

Described the 3rd control output unit 8 is when the 3rd air compressor breaks down, under the control of CPU, export out-of-work signal to the 3rd air compressor, the 3rd air compressor quit work at once, and the 3rd control output unit 8 is simultaneously to the 3rd timing start unit 9 output actuating signals; The 3rd regularly start unit 9 send start timing signal to first air compressor, second air compressor after receiving the actuating signal of the 3rd control output unit 8, first air compressor, second air compressor were started in the time of setting, if first air compressor, second air compressor do not start in the time of setting, the control signal that the 3rd timing start unit 9 sends just no longer works, and prevents that first air compressor, second air compressor also are in fault state.

Described power subsystem 10, converting ac power supply to DC electrical source is the foregoing circuit power supply.

When using the utility model to control three air compressors, can be with any wherein two air compressors as using unit, and will left in an air compressor as standby unit, when any one no-cooling-water, exhaust high temperature, electrical failure (main motor overload, main motor coil temperature is too high, the thin separator pressure reduction of oil is high) abnormal problem occurs when two air compressors that use, by control of the present utility model, can under the situation of dispense with parking, just can start standby unit smoothly, guarantee the continuity of work.

Claims

1, a kind of PLC control gear of three air compressor chain promoters is characterized in that including:

One first air compressor faut detection input unit (1) will be passed to CPU from that detected no cold lack of water signal of first air compressor, exhaust high temperature signal, electrical failure signal;

One second air compressor faut detection input unit (2) will be passed to CPU from that detected no cold lack of water signal of second air compressor, exhaust high temperature signal, electrical failure signal;

The 3rd an air compressor faut detection input unit (3) will be passed to CPU from that detected no cold lack of water signal of the 3rd air compressor, exhaust high temperature signal, electrical failure signal;

One first control output unit (4) when first air compressor breaks down, is exported out-of-work signal to first air compressor, and to first timing start unit (5) the output actuating signal;

One first timing start unit (5) sends start timing signal to second air compressor, the 3rd air compressor after the actuating signal of its reception first control output unit (4);

One second control output unit (6) when second air compressor breaks down, is exported out-of-work signal to second air compressor, and to second timing start unit (7) the output actuating signal;

One second timing start unit (7) sends start timing signal to first air compressor, the 3rd air compressor after the actuating signal of its reception second control output unit (6);

One the 3rd control output unit (8) when the 3rd air compressor breaks down, is exported out-of-work signal to the 3rd air compressor, and to the 3rd timing start unit (9) output actuating signal;

One the 3rd start unit (9) regularly, it sends start timing signal to first air compressor, second air compressor after receiving the actuating signal of the 3rd control output unit (8);

A power subsystem (10), converting ac power supply to DC electrical source is the foregoing circuit power supply.