CN104238436A - Monitoring circuit of touch screen type plasma spraying system - Google Patents

Abstract

The invention relates to a monitoring circuit of a touch screen type plasma spraying system. The monitoring circuit comprises a power supply circuit, a gas circuit control module, a gas pressure analog acquisition circuit, a gas flow analog acquisition circuit and a human-machine interaction interface module. An inverter power supply is used in the power supply circuit, flexible switching of alternating current and direct current in a control cabinet is achieved, and electricity amount supply stability is guaranteed. A gas parameter analog acquisition circuit is used for converting an analog quantity into a digital quantity, monitoring is accurate, the pressure and flow parameters of argon, nitrogen and hydrogen are collected comprehensively, the gas flow fluctuation situation can be grasped completely and effectively, and accordingly timely and accurate physical parameters are provided for adjusting of a PLC. The gas parameter analog acquisition circuit is used for converting the analog quantity into the digital quantity, the pressure and flow parameters of argon, nitrogen and hydrogen are collected comprehensively, the gas flow fluctuation situation can be grasped completely and effectively, and accordingly the timely and accurate physical parameters are provided for adjusting of the PLC.

Description

A kind of supervisory circuit of touch screen type plasma spray system

Technical field

The present invention relates to technical field of hot, specifically a kind of supervisory circuit of touch screen type plasma spray system.

Background technology

Plasma spraying technology is the accurate spraying method of a kind of new multi-purpose greatly developed after flame spraying, be the technology of a kind of material surface strengthening and surface modification, matrix surface can be made to have wear-resisting, anti-corrosion, high temperature oxidation resisting, electrical isolation, heat insulation, radiation proof, the performance such as anti-attrition and sealing.It is adopt by the plasma-arc of direct-current drive as thermal source that plasma is coated with technology, and plasma gas used for plasma spraying is generally the combination gas of argon gas and hydrogen, and wherein, argon gas is called main gas, need be formed electric arc during use by high pressure ionization; Hydrogen is called that the enthalpy value of time gas is higher, effectively can improve arc power.When starting spray gun, first in spray gun, main gas is passed into, the high-frequency high-voltage utilizing electrode to produce is by main gas ionization thus produce electric arc, and pass into time gas afterwards, this mixed gas is ionized by electric arc, then compressed, finally sprayed by nozzle, form the plasma jet of high speed, high temperature, (nanometer) coating material powder at nozzle place is mixed in described plasma jet simultaneously, be ejected into workpiece substrate surface, form (nanometer) coating.

Publication number is the gas monitor technology that patent discloses a kind of plasma spraying equipment and the control circuit of CN102071389A, it utilizes the flow of the control circuit of plasma spraying equipment main gas of real-time monitoring plasma in high-frequency arc strike stage or spraying process, as forbidden the operation of high-frequency arc strike when detecting that the flow of main gas is less than certain threshold values, or the anxious operation stopping whole system, interrupt spraying process, by the accurate monitoring of article on plasma primary air amount, can guarantee that plasma apparatus is in the process of high-voltage arc strike and spraying, all kinds of accident can not be caused because of the error of plasma primary air amount, stop the accident because the error of the main gas of plasma causes, ensure the safety of equipment and operating personnel.

But in actual use; primary air quantity not sufficient is only one of many factors that possible cause accident to occur; in spraying process; switch board want role to be not only carry out urgency when fluctuation appears in main unsaturated vapor or flow to stop; but need to carry out overall monitor to multiple factors such as coated powder quantity delivered, water pressure of cooling water, cooler-water temperature, Hydrogen Vapor Pressure, argon pressure, nitrogen pressure (as blanket gas), primary air amount, secondary airsheds, and form closed loop control mechanism timely and effectively.

In order in spraying process; ensure the striking safety of spray gun; prevent because switch board operation exception or (nanometer) coated powder, argon gas such as to use up at the causing spray gun to be burned or occurring more serious accident of situation; people need a kind of control to stablize; monitoring comprehensively, has the gas monitor circuit used for plasma spraying of closed loop control function promptly and accurately.

Summary of the invention

In order to solve the problems of the technologies described above, the invention provides a kind of supervisory circuit of touch screen type plasma spray system.

The present invention solves its technical matters and realizes by the following technical solutions:

A supervisory circuit for touch screen type plasma spray system, comprises feed circuit, gas circuit control module, air pressure analog quantity acquisition circuit, simulation of air flow amount Acquisition Circuit and human-computer interaction interface module.

The end of described feed circuit is introduced zero line, live wire and ground wire, double-pole single throw is provided with between described live wire and zero line, on live wire and zero line, correspondence is provided with a fuse and No. two fuses respectively, a described fuse and No. two fuse output terminals are in series with the fan for lowering the temperature to equipment, described feed circuit also comprise an inverter and No. two inverters, because AC-input voltage is become DC voltage by rectifier, and be alternating voltage needed for load, just must become this DC voltage again interchange again with inverter circuit, to realize alternating current and galvanic conversion, guarantee electric current is uninterrupted, a described inverter and No. two inverters all in parallel with fan, the two ends of described fan are also parallel with a signal lamp, a described signal lamp is power light.

Described gas circuit control module comprises PLC, described PLC is the CPU224XP of Siemens, CPU224XP itself carries 2 and enters/1 analog quantity channel gone out, enhance motion control, process control, position control, data monitoring and collection, to communicate etc. in function, be applicable to accurately monitor the pressure of main gas, secondary gas and flow, be beneficial to the circulation status adjusting gas in time, improve the security of circuit supervision.The positive pole of described fan is connected to the L feeder ear of PLC, and the positive pole of fan is also connected with normally closed switch, and the other end of described normally closed switch is connected to the 1L lead-out terminal common port of CPU simultaneously, on 2L lead-out terminal common port and 3L lead-out terminal common port, the negative pole of described fan is connected with a relay simultaneously, No. two relays, No. three relays, No. four relays, No. five relays, No. six relays, No. seven relays, No. eight relays and No. nine relays, the negative pole of fan is also connected with No. two signal lamps, a described relay, No. two relays, No. three relays, No. four relays, No. five relays, No. six relays, No. seven relays, the positive pole of No. eight relays and No. nine relays is connected respectively the Q0.0 lead-out terminal at PLC, Q0.1 lead-out terminal, Q0.2 lead-out terminal, Q0.3 lead-out terminal, Q0.4 lead-out terminal, Q0.5 lead-out terminal, Q0.6 lead-out terminal, Q0.7 lead-out terminal, on Q1.0 lead-out terminal, described each lead-out terminal can control the actuating of relay of each correspondence, the positive pole of No. two signal lamps is connected on the Q1.0 lead-out terminal of PLC, the 1M input terminal common end grounding of described PLC, the I0.1 input terminal of PLC is connected with dynamic circuit breaker switch, described dynamic circuit breaker switch and normally closed switch are combined switch, dynamic circuit breaker switch is the control end of normally closed switch, the I0.2 input terminal of PLC is connected with cooling-water temperature sensor, the I0.3 input terminal of PLC is connected with hydraulic pressure sensor, the L+ port of described PLC connects+24V direct current, the M port ground connection of PLC.

Described air pressure analog quantity acquisition circuit comprises an Analog input mModule, a described Analog input mModule is the EM231 Analog input mModule of Siemens, the L+ port of a described Analog input mModule is communicated with the L+ port of PLC, the M port of an Analog input mModule is communicated with the M port of PLC, the RA input channel of an Analog input mModule and A+ input channel are connected with a baroceptor jointly, the RB input channel of an Analog input mModule and B+ input channel are connected with No. two baroceptors jointly, the RC input channel of an Analog input mModule and C+ input channel are connected with No. three baroceptors jointly, the A-input channel of an Analog input mModule, B-input channel, the public incoming end of C-input channel ground wire is connected on the ground line output terminal of No. two inverters, a described baroceptor, No. two baroceptors, the public incoming end of+24V direct current of No. three baroceptors is connected on+24V the DC output end of No. two inverters, realization utilizes an inverter, No. two inverters exchange at inside circuit, direct current is changed.

Described simulation of air flow amount Acquisition Circuit comprises No. two Analog input mModule, described No. two Analog input mModule are the EM231 Analog input mModule of Siemens, the L+ port of described No. two Analog input mModule is communicated with the L+ port of PLC, the M port of No. two Analog input mModule is communicated with the M port of PLC, the A+ input channel of No. two Analog input mModule and A-input channel are connected with a pneumatic sensor jointly, the B+ input channel of No. two Analog input mModule and B-input channel are connected with No. two pneumatic sensors jointly, a described pneumatic sensor, the public input end of-15V direct current of No. two pneumatic sensors, the public input end of+15V direct current, the public input end of ground wire is connected respectively the-15V DC output end at an inverter, + 15V DC output end, on ground line output terminal, realization utilizes an inverter, No. two inverters exchange at inside circuit, direct current is changed, without the need to external dc power supply or multiple power supply supply side.

Described human-computer interaction interface model calling has+24V direct current, zero line and ground wire, and user realizes the start and stop of equipment and the adjustment to each parameter by handling human-computer interaction interface, and more intuitively, control panel is compacter, more effectively can prevent maloperation.

Described No. five relays comprise No. five forceful electric power switches and No. five solenoid valves, described No. six relays comprise No. six forceful electric power switches and No. six solenoid valves, described No. seven relays comprise No. seven forceful electric power switches and No. seven solenoid valves, No. eight forceful electric power switches and No. eight solenoid valves are included in described No. eight relays, and No. five relays, No. six relays, No. seven relays and No. eight relays all in parallel with fan, when the light current terminal action of the arbitrary relay in described each relay, the forceful electric power terminal that described light current terminal is corresponding, i.e. forceful electric power switch, action simultaneously, the solenoid valve action of answering with forceful electric power Switch Controller, realize the opening and closing of valve.

A described baroceptor is argon pressure sensor, and described No. two baroceptors are nitrogen pressure sensor, and described No. three baroceptors are hydrogen gas pressure sensor, and argon gas is main gas, and nitrogen is blanket gas, and hydrogen is time gas.

A described pneumatic sensor is primary air quantity detection sensor, and described No. two pneumatic sensors are hydrogen flowing quantity detecting sensor.

A described relay is the relay that control circuit starts, described No. two relays are the relay that control circuit stops, described No. three relays are the relay controlling on/off, described No. four relays are the relay controlling cooling-water machine start and stop, and described No. five relays, No. six relays, No. seven relays, No. eight relays and No. nine relays correspond to the relay controlling the supply of argon gas, nitrogen, hydrogen, air and powder respectively.

The invention has the beneficial effects as follows:

(1) the present invention adopts touch-screen to control, human-computer interaction interface is utilized to reduce the area of control panel, have compressed the volume of switch board, the image of touch-screen display simultaneously, be not easy maloperation, touch-screen effectively can reduce the use amount of physics components and parts, thus reduces the damage probability of switch board manipulation button;

(2) feed circuit of the present invention adopt inverter, achieve alternating current and galvanic flexible transformation in switch board, eliminate the use of direct supply, have compressed number of, lines, ensure that electricity supply is stable;

(3) the present invention adopts gas parameter analog quantity acquisition circuit, analog quantity is converted into digital quantity, monitoring accurately, and acquire argon gas, nitrogen, the pressure of hydrogen and flow parameter all sidedly, can be thorough effectively control gas flow fluctuations situation, thus provide physical parameter promptly and accurately to the adjustment of PLC;

(4) signal input part of described PLC is also connected with water temperature, hydraulic pressure sensor, due to the extreme temperatures of plasma-arc, spray gun needs continuously to cool fast, chilled water is for spray gun carries out the most frequently used medium of lowering the temperature, the too high cooling effectiveness that will cause of cooler-water temperature reduces, cutting off the water supply in the too low spray gun of hydraulic pressure more likely causes spray gun to burn out instantaneously, therefore detects water temperature hydraulic pressure in time and corresponding data is passed to PLC to ensure that spray gun temperature remains on the powerful measure in safe range;

(5) the present invention adopts dynamic circuit breaker switch and the combined mode of normally closed switch, makes dynamic circuit breaker switch become the control end of normally closed switch, when water temperature over-high or hydraulic pressure too low time, sensor sends high level to I0.2 or I0.3, makes dynamic circuit breaker switch motion simultaneously.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is integrated circuit figure of the present invention;

Fig. 2 is the inner structure schematic diagram of No. five relays of the present invention, No. six relays, No. seven relays and No. eight relays.

Embodiment

The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.

As shown in Figure 1 and Figure 2, a kind of supervisory circuit of touch screen type plasma spray system, comprises feed circuit 1, gas circuit control module 2, air pressure analog quantity acquisition circuit 3, simulation of air flow amount Acquisition Circuit 4 and human-computer interaction interface module 5.

The end of described feed circuit 1 is introduced zero line, live wire and ground wire, double-pole single throw Q1 is provided with between described live wire and zero line, on live wire and zero line, correspondence is provided with a fuse F1 and No. two fuse F2 respectively, a described fuse F1 and No. two fuse F2 output terminal is in series with the fan 1a for lowering the temperature to equipment, described feed circuit 1 also comprise an inverter 1b and No. two inverter 1c, because AC-input voltage is become DC voltage by rectifier, and be alternating voltage needed for load, just must become this DC voltage again interchange again with inverter circuit, to realize alternating current and galvanic conversion, guarantee electric current is uninterrupted, a described inverter 1b and No. two inverter 1c is all in parallel with fan 1a, the two ends of described fan 1a are also parallel with a signal lamp L1, a described signal lamp L1 is power light.

Described gas circuit control module 2 comprises PLC (programmable logic controller (PLC)) 2a, described PLC2a is the CPU224XP of Siemens, CPU224XP itself carries 2 and enters/1 analog quantity channel gone out, enhance motion control, process control, position control, data monitoring and collection, to communicate etc. in function, be applicable to accurately monitor the pressure of main gas, secondary gas and flow, be beneficial to the circulation status adjusting gas in time, improve the security of circuit supervision.The positive pole of described fan 1a is connected to the L feeder ear of PLC2a, and the positive pole of fan 1a is also connected with normally closed switch Q2, and the other end of described normally closed switch Q2 is connected to the 1L lead-out terminal common port of CPU simultaneously, on 2L lead-out terminal common port and 3L lead-out terminal common port, the negative pole of described fan 1a is connected with a relay 1K simultaneously, No. two relay 2K, No. three relay 3K, No. four relay 4K, No. five relay 5K, No. six relay 6K, No. seven relay 7K, No. eight relay 8K and No. nine relay 9K, the negative pole of fan 1a is also connected with No. two signal lamp L2, a described relay 1K, No. two relay 2K, No. three relay 3K, No. four relay 4K, No. five relay 5K, No. six relay 6K, No. seven relay 7K, the positive pole of No. eight relay 8K and No. nine relay 9K is connected respectively the Q0.0 lead-out terminal at PLC2a, Q0.1 lead-out terminal, Q0.2 lead-out terminal, Q0.3 lead-out terminal, Q0.4 lead-out terminal, Q0.5 lead-out terminal, Q0.6 lead-out terminal, Q0.7 lead-out terminal, on Q1.0 lead-out terminal, described each lead-out terminal can control the actuating of relay of each correspondence, the positive pole of No. two signal lamp L2 is connected on the Q1.0 lead-out terminal of PLC2a, the 1M input terminal common end grounding of described PLC2a, the I0.1 input terminal of PLC2a is connected with dynamic circuit breaker switch Q3, described dynamic circuit breaker switch Q3 and normally closed switch Q2 is combined switch, dynamic circuit breaker switch Q3 is the control end of normally closed switch Q2, the I0.2 input terminal of PLC2a is connected with cooling-water temperature sensor, the I0.3 input terminal of PLC2a is connected with hydraulic pressure sensor, the L+ port of described PLC2a connects+24V direct current, the M port ground connection of PLC2a.

Described air pressure analog quantity acquisition circuit 3 comprises an Analog input mModule 3d, a described Analog input mModule 3d is the EM231 Analog input mModule of Siemens, the L+ port of a described Analog input mModule 3d is communicated with the L+ port of PLC2a, the M port of an Analog input mModule 3d is communicated with the M port of PLC2a, the RA input channel of an Analog input mModule 3d and A+ input channel are connected with a baroceptor 3a jointly, the RB input channel of an Analog input mModule 3d and B+ input channel are connected with No. two baroceptor 3b jointly, the RC input channel of an Analog input mModule 3d and C+ input channel are connected with No. three baroceptor 3c jointly, the A-input channel of an Analog input mModule 3d, B-input channel, C-input channel common ground incoming end 10 is connected on No. two ground line output terminals 15 of No. two inverter 1c, a described baroceptor 3a, No. two baroceptor 3b, the public incoming end 9 of+24V direct current of No. three baroceptor 3c is connected on+24V the DC output end 14 of No. two inverter 1c, realization utilizes an inverter 1b, No. two inverter 1c exchange at inside circuit, direct current is changed, without the need to external dc power supply or multiple power supply supply side.

Described simulation of air flow amount Acquisition Circuit 4 comprises No. two Analog input mModule 4c, described No. two Analog input mModule 4c are the EM231 Analog input mModule of Siemens, the L+ port of described No. two Analog input mModule 4c is communicated with the L+ port of PLC2a, the M port of No. two Analog input mModule 4c is communicated with the M port of PLC2a, the A+ input channel of No. two Analog input mModule 4c and A-input channel are connected with a pneumatic sensor 4a jointly, the B+ input channel of No. two Analog input mModule 4c and B-input channel are connected with No. two pneumatic sensor 4b jointly, a described pneumatic sensor 4a, the public input end 11 of-15V direct current of No. two pneumatic sensor 4b, the public input end 13 of+15V direct current, ground wire public input end 12 correspondence is connected to the-15V DC output end 6 of an inverter 1b, + 15V DC output end 8, on ground line output terminal 7.

Described human-computer interaction interface module 5 is connected with+24V direct current, zero line and ground wire, and user realizes the start and stop of equipment and the adjustment to each parameter by handling human-computer interaction interface, and more intuitively, control panel is compacter, more effectively can prevent maloperation.

Described No. five relay 5K comprise No. five forceful electric power switch S 5 and No. five solenoid valve SV1, described No. six relay 6K comprise No. six forceful electric power switch S 6 and No. six solenoid valve SV2, described No. seven relay 7K comprise No. seven forceful electric power switch S 7 and No. seven solenoid valve SV3, No. eight forceful electric power switch S 8 and No. eight solenoid valve SV4 are included in described No. eight relay 8K, and No. five relay 5K, No. six relay 6K, No. seven relay 7K and No. eight relay 8K are all in parallel with fan 1a, when the light current terminal action of the arbitrary relay in described each relay, the forceful electric power terminal that described light current terminal is corresponding, i.e. forceful electric power switch, action simultaneously, the solenoid valve action of answering with forceful electric power Switch Controller, realize the opening and closing of valve.

A described baroceptor 3a is argon pressure sensor, and described No. two baroceptor 3b are nitrogen pressure sensor, and described No. three baroceptor 3c are hydrogen gas pressure sensor, and argon gas is main gas, and nitrogen is blanket gas, and hydrogen is time gas.

A described pneumatic sensor 4a is primary air quantity detection sensor, and described No. two pneumatic sensor 4b are hydrogen flowing quantity detecting sensor.

A described relay 1K is the relay that control circuit starts, described No. two relay 2K are the relay that control circuit stops, described No. three relay 3K are the relay controlling on/off, described No. four relay 4K are the relay controlling cooling-water machine start and stop, and described No. five relay 5K, No. six relay 6K, No. seven relays, No. eight relays and No. nine relays correspond to the relay controlling the supply of argon gas, nitrogen, hydrogen, air and powder respectively.

In use, C+, C-port of No. two Analog input mModule 4c connects electric current display, and D+, D-port of No. two Analog input mModule 4c connects voltage display, and the I pin of PLC is connected current setting circuit with M pin place.

When lighting a fire, first nitrogen valve and argon gas valve are opened, argon gas starts ionization after passing into rifle body, produce electric arc, hydrogen valve is opened afterwards, hydrogen flowing quantity detecting sensor starts to detect, hydrogen enters rifle body, gas is in rifle head combustion, form the jet of high-voltage high-speed, add dusty spray simultaneously, utilize high-temperature electric arc by powder smelting, and utilize pressure-air by fusing powder spray on workpiece to be repaired, PLC controls the actuating of relay of cooling-water machine simultaneously, cooling-water machine is to Cooling Water in spray gun, for spray gun cooling, work as cooler-water temperature, when hydraulic pressure occurs abnormal, corresponding sensor sends high level to I0.2 or I0.3, make dynamic circuit breaker switch motion, equipment is anxious to stop, prevent from burning out spray gun, when interrupting appears in spraying raw material supply, No. two signal lamps and bright light are reported to the police.

More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (4)

1. the supervisory circuit of a touch screen type plasma spray system, comprise feed circuit (1), gas circuit control module (2), air pressure analog quantity acquisition circuit (3), simulation of air flow amount Acquisition Circuit (4) and human-computer interaction interface module (5), the end of described feed circuit (1) is introduced zero line, live wire and ground wire, double-pole single throw (Q1) is provided with between described live wire and zero line, on live wire and zero line, correspondence is provided with a fuse (F1) and No. two fuses (F2) respectively, a described fuse (F1) and No. two fuse (F2) output terminals are in series with fan (1a), it is characterized in that: described feed circuit (1) also comprise an inverter (1b) and No. two inverters (1c), a described inverter (1b) and No. two inverters (1c) all in parallel with fan (1a), the two ends of described fan (1a) are also parallel with a signal lamp (1L),

Described gas circuit control module (2) comprises PLC (2a), the CPU224XP that described PLC (2a) is Siemens, the positive pole of described fan (1a) is connected to the L feeder ear of PLC (2a), the positive pole of fan (1a) is also connected with normally closed switch (Q1), and the other end of described normally closed switch (Q1) is connected to the 1L lead-out terminal common port of CPU simultaneously, on 2L lead-out terminal common port and 3L lead-out terminal common port, the negative pole of described fan (1a) is connected with a relay (1K) simultaneously, No. two relays (2K), No. three relays (3K), No. four relays (4K), No. five relays (5K), No. six relays (6K), No. seven relays (7K), No. eight relays (8K) and No. nine relays (9K), the negative pole of fan (1a) is also connected with No. two signal lamps (L2), a described relay (1K), No. two relays (2K), No. three relays (3K), No. four relays (4K), No. five relays (5K), No. six relays (6K), No. seven relays (7K), the positive pole of No. eight relays (8K) and No. nine relays (9K) is connected respectively the Q0.0 lead-out terminal at PLC (2a), Q0.1 lead-out terminal, Q0.2 lead-out terminal, Q0.3 lead-out terminal, Q0.4 lead-out terminal, Q0.5 lead-out terminal, Q0.6 lead-out terminal, Q0.7 lead-out terminal, on Q1.0 lead-out terminal, the positive pole of No. two signal lamps (L2) is connected on the Q1.0 lead-out terminal of PLC (2a), the 1M input terminal common end grounding of described PLC (2a), the I0.1 input terminal of PLC (2a) is connected with dynamic circuit breaker switch (Q3), described dynamic circuit breaker switch (Q3) and normally closed switch (Q1) are combined switch, the control end that dynamic circuit breaker switch (Q3) is normally closed switch (Q1), the I0.2 input terminal of PLC (2a) is connected with cooling-water temperature sensor, the I0.3 input terminal of PLC (2a) is connected with hydraulic pressure sensor, described cooling-water temperature sensor and hydraulic pressure sensor are all connected with dynamic circuit breaker switch (Q3), when water temperature over-high or hydraulic pressure too low time, dynamic circuit breaker switch (Q3) triggers normally closed switch (Q1) and disconnects, the L+ port of PLC (2a) connects+24V direct current, the M port ground connection of PLC (2a),

Described air pressure analog quantity acquisition circuit (3) comprises an Analog input mModule (3d), the EM231 Analog input mModule that a described Analog input mModule (3d) is Siemens, the L+ port of a described Analog input mModule (3d) is communicated with the L+ port of PLC (2a), the M port of an Analog input mModule (3d) is communicated with the M port of PLC (2a), the RA input channel of an Analog input mModule (3d) and A+ input channel are connected with a baroceptor (3a) jointly, the RB input channel of an Analog input mModule (3d) and B+ input channel are connected with No. two baroceptors (3b) jointly, the RC input channel of an Analog input mModule (3d) and C+ input channel are connected with No. three baroceptors (3c) jointly, the A-input channel of an Analog input mModule (3d), B-input channel, C-input channel common ground incoming end (10) connects No. two ground line output terminal (15) of No. two inverters (1c), a described baroceptor (3a), No. two baroceptors (3b), the public incoming end of+24V direct current (9) of No. three baroceptors (3c) connects+24V DC output end (14) of No. two inverters (1c),

Described simulation of air flow amount Acquisition Circuit (4) comprises No. two Analog input mModule (4c), the EM231 Analog input mModule that described No. two Analog input mModule (4c) are Siemens, the L+ port of described No. two Analog input mModule (4c) is communicated with the L+ port of PLC (2a), the M port of No. two Analog input mModule (4c) is communicated with the M port of PLC (2a), the A+ input channel of No. two Analog input mModule (4c) and A-input channel are connected with a pneumatic sensor (4a) jointly, the B+ input channel of No. two Analog input mModule (4c) and B-input channel are connected with No. two pneumatic sensors (4b) jointly, a described pneumatic sensor (4a), the public input end of-15V direct current (11) of No. two pneumatic sensors (4b), the public input end of+15V direct current (13), the public input end of ground wire (12) correspondence is connected with the-15V DC output end (6) of an inverter (1b), + 15V DC output end (8), ground line output terminal (7),

Described human-computer interaction interface module (5) is connected with+24V direct current, zero line and ground wire.

2. the supervisory circuit of a kind of touch screen type plasma spray system according to claim 1, it is characterized in that: described No. five relay 5K comprise No. five forceful electric power switches (S5) and No. five solenoid valves (SV1), described No. six relays (6K) comprise No. six forceful electric power switches (S6) and No. six solenoid valves (SV2), described No. seven relays (7K) comprise No. seven forceful electric power switches (S7) and No. seven solenoid valves (SV3), No. eight forceful electric power switches (S8) and No. eight solenoid valves (SV4) are included in described No. eight relays (8K), and No. five relays (K5), No. six relays (K6), No. seven relays (K7) and No. eight relays (K8) all in parallel with fan (1a).

3. the supervisory circuit of a kind of touch screen type plasma spray system according to claim 1, it is characterized in that: a described baroceptor (3a) is argon pressure sensor, described No. two baroceptors (3b) are nitrogen pressure sensor, and described No. three baroceptors (3c) are hydrogen gas pressure sensor.

4. the supervisory circuit of a kind of touch screen type plasma spray system according to claim 1, it is characterized in that: a described pneumatic sensor (4a) is primary air quantity detection sensor, described No. two pneumatic sensors (4b) are hydrogen flowing quantity detecting sensor.