CN211219106U

CN211219106U - Rust removal device

Info

Publication number: CN211219106U
Application number: CN201921973395.8U
Authority: CN
Inventors: 肖文成; 周宏观
Original assignee: Shenzhen Jasic Technology Co ltd
Current assignee: Shenzhen Jasic Technology Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-08-11
Anticipated expiration: 2029-11-15

Abstract

A rust removal device comprises a medium-frequency rectification circuit, a positive electrode output end, a negative electrode output end, an arc striking circuit, a nozzle, a power supply circuit and a power supply circuit, wherein the medium-frequency rectification circuit is used for performing medium-frequency rectification on an accessed medium-frequency low-voltage alternating current signal and then outputting a direct current signal to the nozzle and an electrode through the positive electrode output end and the negative electrode output end respectively; the compressed gas is used for ejecting the electric arc from the narrow pore passage of the nozzle, the energy of the compressed electric arc is more concentrated, and the gas in the arc column is fully ionized to form high-temperature plasma arc. The high-temperature and high-speed plasma arc acts on the rusted workpiece, so that rusts on the surface of the rusted workpiece expand, deform and crush instantly after being heated by the plasma arc and impacted by the plasma at high speed, and finally the surface of the rusted workpiece is peeled off, thereby achieving the effect of rust removal. The rust removing device can efficiently, quickly and thoroughly clean rust on workpieces with various shapes, avoids a large amount of dust generated by mechanical friction, is low in noise and environment-friendly, does not need a special rust removing field, and is high in practicability.

Description

Rust removal device

Technical Field

The utility model belongs to the technical field of the rust cleaning, especially, relate to a rust cleaning device.

Background

In industrial production, before cutting, welding, painting or electroplating of a metal plate, an oxide layer, namely rust, on the surface of the metal plate needs to be removed. At present, three traditional rust removal methods are available, wherein the first method is a manual rust removal method, and a hammer, a scraper or a wire brush and the like are rubbed on the surface of a metal plate to remove rust; the second method is a mechanical derusting method, which carries out mechanical derusting by a gear rotating deruster, a shot blasting deruster or a high-pressure water abrasive deruster and the like. The working principle of the manual rust removal and the mechanical rust removal is that certain substances are used for rubbing an oxide layer on the surface of a metal plate to achieve the aim of rust removal. The third method is to use chemical rust removal method and chemical agent to soak the metal plate to corrode the oxide layer. The first two methods have low efficiency, cannot completely remove rust, are difficult to treat small workpieces and workpieces with complex shapes, are easy to leave rust on metal plates, and are not beneficial to further processing the metal plates; in addition, more dust and noise are generated in the rust removing process, and the health of rust removing workers is damaged. The third method has high cost, needs a special derusting site, uses a large amount of chemical agents to carry out acid cleaning on the metal plates, seriously pollutes the environment and influences the health of derusting workers.

Therefore, the traditional technical schemes of manual rust removal and mechanical rust removal have the problems that rust cannot be completely removed, small workpieces and workpieces with complex shapes are difficult to treat, and much dust and loud noise are easy to generate.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a rust cleaning device aims at solving and has existed in traditional manual rust cleaning and the mechanical rust cleaning technical scheme and can't remove the rust completely, and the processing to small work piece and complicated appearance work piece is more difficult to produce the problem of great dust easily.

The embodiment of the utility model provides a rust cleaning device, include:

the intermediate frequency rectification circuit is used for outputting direct current electric signals through the anode output end and the cathode output end respectively after performing intermediate frequency rectification on the accessed intermediate frequency low-voltage alternating current electric signals;

the arc striking circuit is connected with the cathode output end of the intermediate frequency rectification circuit and is used for outputting a target frequency signal and coupling the target frequency signal to the cathode output end;

the electrode is connected with the negative electrode output end of the intermediate frequency rectifying circuit and used for discharging to break down gas and igniting electric arcs; and

and the nozzle is connected with the positive electrode output end of the intermediate frequency rectifying circuit, is used for forming a loop through the punctured gas, is electrically connected with the electrode, and sprays the electric arc to form a plasma arc so as to clean rust on the workpiece.

Further, the method also comprises the following steps:

the power circuit is connected with the intermediate frequency rectifying circuit and used for inverting the accessed power frequency alternating current signal after power frequency rectification and filtering to an intermediate frequency high voltage alternating current signal, and outputting the intermediate frequency low voltage alternating current signal to the intermediate frequency rectifying circuit after voltage conversion of the intermediate frequency high voltage alternating current signal;

the adjusting circuit is connected with the power circuit and used for sampling the intermediate-frequency high-voltage alternating current signal, comparing the intermediate-frequency high-voltage alternating current signal with a given current and outputting an adjusting signal to the power circuit so as to eliminate errors;

the current setting circuit is connected with the regulating circuit and used for correspondingly generating and outputting the given current to the regulating circuit according to the received control instruction; and

and the human-computer interaction component is connected with the current given circuit and used for a user to input the control command.

Further, the method also comprises the following steps:

and the compressed air flow control assembly is used for conveying compressed air into an inner cavity of the nozzle according to a preset air flow rate so that the nozzle ejects the electric arc to form a plasma arc.

Further, the control command comprises an air pressure value adjusting command and/or a given current value adjusting command.

Further, the method also comprises the following steps:

and the reactor is connected in series with the output end of the negative electrode and used for stabilizing the arc.

Further, the arc striking circuit includes:

a high voltage generator generating and outputting the target frequency signal; and

and the arc striking coil is connected with the high-voltage generator and is used for coupling the target frequency signal into the negative electrode output end.

Further, the power supply circuit includes:

a power frequency rectifying unit for performing power frequency rectification and filtering on the power frequency alternating current signal and outputting an initial direct current signal;

the inversion unit is connected with the power frequency rectification unit and the regulating circuit and is used for outputting the intermediate-frequency high-voltage alternating current signal after the initial direct current signal is subjected to inversion processing and adjusting the output intermediate-frequency high-voltage alternating current signal in real time according to the regulating signal; and

and the main transformer coupling unit is connected with the inverter unit and is used for outputting the intermediate-frequency low-voltage alternating current signal to the intermediate-frequency rectifying circuit after voltage conversion is carried out on the intermediate-frequency high-voltage alternating current signal.

The derusting device comprises the intermediate-frequency rectifying circuit, the arc striking circuit, the electrode and the nozzle. Wherein, carry out the intermediate frequency rectification back through positive output end and negative output end output direct current signal to nozzle and electrode respectively to the intermediate frequency low pressure alternating current signal of access through intermediate frequency rectifier circuit, striking circuit output target frequency signal and with it coupling to the negative output end, thereby make the electrode discharge, puncture the gas between electrode and the nozzle, the ignition electric arc, lead to the compressed gas with certain flow between electrode and nozzle simultaneously, compressed gas is blowout from the constrictive pore canal of nozzle with electric arc, electric arc energy through the compression is more concentrated, gaseous abundant ionization in the arc post, thereby form high temperature plasma arc. The high-temperature and high-speed plasma arc acts on a rusty workpiece, and rusty stains on the surface of the workpiece are instantaneously expanded, deformed and crushed after being heated by the plasma arc and impacted by the plasma at a high speed, so that the surface of the workpiece is finally stripped, and the aim of removing rust is fulfilled. The rust removing device is a novel rust removing process, is not influenced by the size and the appearance of a workpiece to be subjected to rust removal, can easily, quickly and thoroughly clean rust on various workpieces, is high in efficiency, avoids mechanical friction from generating a large amount of harmful dust, is low in noise and environment-friendly, does not need a special rust removing field, and is low in cost and high in practicability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural view of a rust removing device according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a rust removing device according to a second embodiment of the present invention;

FIG. 3 is a schematic view of a unit structure of the rust removing apparatus shown in FIG. 2;

fig. 4 is a circuit diagram showing an example of a power circuit and an intermediate frequency rectifying module in the rust removing apparatus shown in fig. 2;

fig. 5 is an exemplary circuit diagram of a current setting circuit in the rust removing apparatus shown in fig. 2;

fig. 6 is an exemplary circuit diagram of an adjusting circuit in the rust removing device shown in fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of specific embodiments that can be constructed in accordance with the teachings herein

Referring to fig. 1, a schematic structural diagram of a rust removing device according to a first embodiment of the present invention is shown, for convenience of description, only the parts related to the embodiment are shown, and the details are as follows:

a rust removing device comprises an intermediate frequency rectifying circuit 10, an arc striking circuit 20, an electrode 30 and a nozzle 40.

The intermediate frequency rectifying circuit 10 comprises a positive electrode output end and a negative electrode output end, the arc striking circuit 20 is connected with the negative electrode output end, the electrode 30 is connected with the negative electrode output end, and the nozzle 40 is connected with the positive electrode output end. After the gas is broken down, the electrode 30 is communicated with the nozzle 40 through ionized gas, so that a loop is formed, namely the loop is formed from the cathode output end of the intermediate frequency rectifying circuit 10, the electrode 30, the ionized gas and the nozzle 40 to the anode output end of the intermediate frequency rectifying circuit 10.

The intermediate frequency rectifying circuit 10 is used for performing intermediate frequency rectification on the accessed intermediate frequency low voltage alternating current signal and then outputting a direct current signal through a positive electrode output end and a negative electrode output end respectively. Specifically, the voltage value of the direct current signal is 300V.

The arc striking circuit 20 is configured to output a target frequency signal and couple the target frequency signal to the negative output terminal. Specifically, the target frequency signal is a high-voltage high-frequency alternating current signal, the utility model discloses a high-frequency arc striking mechanism ignites the electric arc between electrode 30 and nozzle 40. The arc is only kept between the electrode 30 and the nozzle 40, the intermediate frequency rectifying circuit 10 is directly connected with the electrode 30 and the nozzle 40, the electrode 30 and the nozzle 40 are directly powered, and a loop is not formed between the electrode 30 and the workpiece 01 all the time. The arc is ejected from the nozzle 40 to form a plasma arc which acts directly on the surface of the workpiece 01 to clean the workpiece 01 of rust.

The electrode 30 is used to discharge to break down the gas and ignite the arc. In the present embodiment, the electrode 30 is implemented by a cerium tungsten rod or a thorium tungsten rod, the electrode 30 is connected to the negative output terminal as a cathode, and the nozzle 40 is connected to the positive output terminal as an anode, so that a circuit is formed by the punctured gas.

The nozzle 40 sprays electric arc to form plasma arc, the temperature of the plasma arc can reach 15000-30000 ℃, rust on the surface of the workpiece 01 is instantaneously expanded, deformed and crushed after being heated by the plasma arc and high-speed impact of the plasma, and finally the surface of the workpiece 01 is peeled off, so that the aim of removing rust is fulfilled. Compared with manual and semi-mechanical derusting processes, the dust removing process has the advantages that the dust amount and the noise are greatly reduced, the working efficiency is high, and the derusting operation can be thoroughly carried out on workpieces 01 with small volumes or workpieces 01 with complex shapes without dead angles.

Referring to fig. 2, a structural schematic diagram of a rust removing device according to a second embodiment of the present invention is shown, for convenience of description, only the parts related to the embodiment are shown, and the details are as follows:

in an alternative embodiment, the above-mentioned rust removing device further comprises a power supply circuit 50, a regulating circuit 60, a current giving circuit 70 and a human-computer interaction assembly 80.

The human-computer interaction assembly 80 is connected with the current setting circuit 70, the current setting circuit 70 is connected with the adjusting circuit 60, and the adjusting circuit 60 is connected with the power circuit 50.

The power circuit 50 is configured to perform power frequency rectification and filtering on the power frequency ac electrical signal, invert the power frequency ac electrical signal into an intermediate-frequency high-voltage ac electrical signal, perform voltage conversion on the intermediate-frequency high-voltage ac electrical signal, and output the intermediate-frequency low-voltage ac electrical signal to the intermediate-frequency rectifier circuit 10.

Specifically, the power circuit 50 and the intermediate frequency rectifying circuit 10 together form a main loop, the main loop is directly connected with the electrode 30 and the nozzle 40, the electrode 30 and the nozzle 40 are powered, arc striking is assisted through the arc striking circuit 20, and rust on the workpiece 01 is cleaned by using high-temperature high-speed plasma flow of plasma arc.

The adjusting circuit 60 is configured to sample the intermediate-frequency high-voltage ac signal, compare the intermediate-frequency high-voltage ac signal with a given current, and output an adjusting signal to the power circuit 50 to eliminate an error.

Optionally, the adjusting circuit 60 is implemented by a PI controller (proportional integral controller), which timely eliminates the deviation generated in the working process of the power circuit 50, including an error, and once the deviation is generated, the PI controller immediately performs adjustment to reduce the deviation; the PI controller is also used for eliminating static error and improving the non-error degree of the system. Therefore, the PI controller can improve the steady-state performance of the entire rust removing device.

The current setting circuit 70 is configured to generate and output a setting current to the regulating circuit 60 according to the received control command.

Specifically, in this embodiment, the output power of the rust removing device can be correspondingly adjusted by adjusting the magnitude of the given current, a user correspondingly inputs a control instruction as needed to control the increase or decrease of the given current output by the current given circuit 70, the PI regulator compares the intermediate-frequency high-voltage alternating current signal with the given current, and then outputs an adjustment signal to the power supply circuit 50 to adjust the output of the power supply circuit 50, so that the output power of the plasma arc is finally adjusted to the magnitude required by the user.

The user inputs control instructions through the human-computer interaction component 80. The human-computer interaction assembly 80 can be realized by adopting a numerical control panel or a parameter adjusting knob.

In an alternative embodiment, the above-mentioned rust removing apparatus further includes a compressed air flow control assembly 100.

The compressed air flow control assembly 100 is connected with the human-computer interaction assembly 80 and is controlled by the human-computer interaction assembly 80. In operation, the compressed air flow control assembly 100 delivers compressed air into the interior of the nozzle 40 at a predetermined flow rate such that the nozzle 40 ejects the arc to form a plasma arc. On the one hand, the compressed air can be used as ionized gas, so that a loop from the negative output end, the electrode 30 and the ionized gas to the positive output end is formed; on the other hand, the compressed air is used as a power source, and the ignited arc is ejected from the nozzle 40 to form a plasma arc and applied to the surface of the rusted workpiece 01. And compressed air is adopted as a power source, so that the cost is low and the practicability is high.

Optionally, the compressed air flow control assembly 100 is implemented by a pressure regulating valve, which is controlled by the human-computer interaction assembly 80 and is used for regulating the flow rate of the compressed air. The preset air flow is controlled and adjusted by the user through the human-computer interaction assembly 80 according to actual needs.

In an alternative embodiment, the control command includes, but is not limited to, an air pressure value adjustment command and/or a given current value adjustment command. Wherein the air pressure value regulating instruction is used for regulating the output air pressure so as to control the air flow rate; the given current value adjustment command is for adjusting the value of the given current.

In practical application, the output power of the plasma arc can be changed by adjusting the output air pressure value and/or the given current value, the flexibility is high, and the plasma arc rust removing device is convenient to be used for correspondingly increasing or decreasing the output power according to the rust degree of the workpiece 01 or other practical conditions so as to achieve the optimal rust removing effect.

In the embodiment, the rust removing device comprises a main body and a plasma gun, wherein the main body comprises the main loop, the arc striking circuit 20, the regulating circuit 60, the current setting circuit 70 and the compressed air flow control assembly 100, the main body is used for supplying power and realizing control, the plasma gun is provided with the human-computer interaction assembly 80, the nozzle 40 and the electrode 30, and the human-computer interaction assembly 80 is arranged on the gun body of the plasma gun, so that a user can input a control command at any time in the use process.

When the plasma gun works, a user holds the plasma gun for removing rust, and the user can be an organism including a human body, and also can be a robot or other automatic intelligent equipment. The plasma gun produces a plasma arc that acts directly on the workpiece 01.

In practical applications, a suitable plasma gun may be selected according to the output power of the plasma arc, for example, when the required output power is small, an air-cooled plasma gun is used, and when the required output power is large, a water-cooled plasma gun is used. The main body is separable from the plasma gun, and the main body can be used with various types of plasma guns.

The rust removing device provided by the embodiment also comprises a power heat dissipation device, and when the rust removing device removes rust, the power heat dissipation device works to dissipate heat so as to improve the load duration rate and keep the plasma arc for a long time.

In an optional embodiment, the rust removing device further comprises a reactor 90. The reactor 90 is connected in series to the negative output end of the intermediate frequency rectification circuit 10, and is used for realizing arc stabilization and enhancing the stability of the plasma arc.

Referring to fig. 3, a schematic diagram of a unit structure of the rust removing device shown in fig. 2 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed as follows:

in an alternative embodiment, the ignition circuit 20 comprises a high voltage generator 201 and an ignition coil 202.

The high voltage generator 201 is connected to the arc striking coil 202, and specifically, the high voltage generator 201 generates and outputs the target frequency signal, and the target frequency signal is coupled to the negative output end by the arc striking coil 202.

The utility model provides a rust cleaning device adopts high-pressure high frequency arc striking mechanism, produces the too high-voltage signal of high frequency in the twinkling of an eye (foretell target frequency signal promptly) through high voltage generator 201, advances the negative pole output with this too high-frequency high-voltage signal coupling by arc striking coil 202 to introduce electrode 30, cause electrode 30 to discharge, with the gas that is being filled in the clearance between puncture electrode 30 and nozzle 40, thereby produce the controllable plasma arc of output.

In an alternative embodiment, the power circuit 50 includes a power frequency rectification power supply, an inverter unit 502 and a main transformer coupling unit 503.

Wherein, power frequency rectification power is connected with inverter unit 502, and inverter unit 502 is connected with main transformer coupling unit honour 503 and regulating circuit 60.

The power frequency rectifying unit 501 performs power frequency rectification and filtering on the alternating current signal and outputs the alternating current signal to the inverting unit 502.

The inverting unit 502 outputs an intermediate frequency high voltage alternating current signal after inverting the initial direct current signal, and adjusts the output intermediate frequency high voltage alternating current signal in real time to the main transformer coupling unit 503 according to the adjustment signal.

The main transformer coupling unit 503 performs voltage conversion on the intermediate frequency high voltage ac electrical signal and outputs an intermediate frequency low voltage ac electrical signal to the intermediate frequency rectifier circuit 10.

Specifically, the adjusting circuit 60 samples the intermediate-frequency high-voltage alternating current signal output by the inverter unit 502, receives the given current output by the current given circuit 70, compares the two signals, and adjusts the signal if there is a deviation, so that the value of the intermediate-frequency high-voltage alternating current signal reaches the value of the given current, thereby enhancing the system stability and achieving the purpose of adjusting the output power of the plasma arc through the PI controller.

Referring to fig. 4, an exemplary circuit diagram of a power circuit 50 and a rectifier module in the rust removing apparatus shown in fig. 2 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed description is as follows:

in an alternative embodiment, the power frequency rectifying unit 501 is connected to an external power frequency ac power supply, the external power frequency ac power supply provides an ac signal of 220V or 380V, and the frequency of the ac signal is 50Hz or 60 Hz.

The power frequency rectifying unit 501 comprises a power frequency rectifying bridge, a capacitor C9 and a capacitor C10; the capacitor C9 and the capacitor C10 are connected in parallel between the two output ends of the power frequency rectifier bridge and used for filtering. The power frequency rectifying bridge rectifies the power frequency of the alternating current signal and then filters the alternating current signal through a capacitor C9 and a capacitor C10.

In an alternative embodiment, the main transformer coupling unit 503 is implemented by using an intermediate frequency transformer T2. The intermediate frequency transformer T2 includes a first primary winding, a second primary winding, and a secondary winding. The second primary winding of the intermediate frequency transformer T2 is connected to the regulating circuit 60 for primary sampling by the supply element transformer circuit. The secondary winding of the intermediate frequency transformer T2 is connected to the intermediate frequency rectifier circuit 10 as an input of the intermediate frequency rectifier circuit 10.

The inverter unit 502 includes an IGBT1(Insulated Gate Bipolar Transistor), an IGBT2, an IGBT3, an IGBT4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, a resistor R2, a resistor R3, and a resistor R4.

The resistor R1 is connected in series with the capacitor C1, one end of the resistor R1 is connected with the drain of the IGBT1, and one end of the capacitor C1 is connected with the source of the IGBT 1; the resistor R2 is connected in series with the capacitor C2, one end of the resistor R2 is connected with the drain of the IGBT2, and one end of the capacitor C2 is connected with the source of the IGBT 2; the resistor R3 is connected in series with the capacitor C3, one end of the resistor R3 is connected with the drain of the IGBT3, and one end of the capacitor C3 is connected with the source of the IGBT 3; the resistor R4 is connected in series with the capacitor C4, one end of the resistor R4 is connected with the drain of the IGBT4, and one end of the capacitor C4 is connected with the source of the IGBT 4.

The gate of the IGBT1, the gate of the IGBT2, the gate of the IGBT3, and the gate of the IGBT4 receive a switching control signal to be turned on or off accordingly, and perform inversion. The drain of the IGBT1 is connected in common with the drain of the IGBT3 and to one end of the capacitor C10, and the source of the IGBT2 is connected in common with the source of the IGBT4 and to the other end of the capacitor C10. The source of the IGBT1 is connected to the drain of the IGBT2, and the source of the IGBT3 is connected to the drain of the IGBT 4.

As can be seen from fig. 4, the IGBT1, the IGBT2, the IGBT3, and the IGBT4 form an inverter full bridge, and a connection point of the IGBT3 and the IGBT4 is used as a first output end of the inverter full bridge and is connected to a first primary winding of the intermediate frequency transformer T2; and the connection point of the IGBT1 and the IGBT2 is used as a second output end of the inverter full bridge and is connected to the second primary winding.

In an alternative embodiment, the intermediate frequency rectification circuit 10 includes a diode D1, a diode D2, a diode D3, a diode D4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a resistor R5, a resistor R6, a resistor R7, and a resistor R8.

The resistor R5 is connected in series with the capacitor C5, one end of the resistor R5 is connected with the cathode of the diode D1, and one end of the capacitor C5 is connected with the anode of the diode D1. The resistor R6 is connected in series with the capacitor C6, one end of the resistor R6 is connected with the cathode of the diode D2, and one end of the capacitor C6 is connected with the anode of the diode D2. The resistor R7 is connected in series with the capacitor C7, one end of the resistor R7 is connected with the cathode of the diode D3, and one end of the capacitor C7 is connected with the anode of the diode D3. The resistor R8 is connected in series with the capacitor C8, one end of the resistor R8 is connected with the cathode of the diode D4, and one end of the capacitor C8 is connected with the anode of the diode D4.

The cathode of the diode D1 and the cathode of the diode D3 are connected together to be used as an anode output end and connected with the nozzle 40; the anode of the diode D2 and the anode of the diode D4 are connected in common as a negative output terminal to the electrode 30.

The anode of the diode D1 and the cathode of the diode D2 are connected together to be used as a first input end of the intermediate frequency rectifying circuit 10, and are connected with the first end of the secondary winding; the anode of the diode D3 and the cathode of the diode D4 are commonly connected to a second input terminal of the intermediate frequency rectifying circuit 10, and are connected to a second terminal of the secondary winding.

The transformer T3 shown in fig. 4 is used as an arc-striking coil 202 to couple the target frequency signal output by the high-voltage generator 201 into the negative output end to assist in arc striking; the reactor 90 is connected in series to the negative output terminal for arc stabilization.

Referring to fig. 5, an exemplary circuit diagram of a current setting circuit 70 in the rust removing apparatus shown in fig. 2 is shown, and for convenience of explanation, only the parts related to the present embodiment are shown, and detailed description is as follows:

in an alternative embodiment, the current setting circuit 70 includes a resistor R87, a resistor R90, a resistor R86, a resistor R82, a resistor R78, a capacitor C50, a capacitor C56, an amplifier IC3D, and an amplifier IC 3A.

The resistor R87 and the resistor R90 are connected in series between the control command input end and the non-inverting input end of the amplifier IC 3D; the resistor R86 is connected in series between the output terminal of the amplifier IC3D and the inverting input terminal of the amplifier IC 3A; the resistor R78 is connected in series between the output terminal of the amplifier IC3A and the given current value adjustment command input terminal of the adjustment circuit 60. The resistor R82 is connected in series between the inverting input terminal of the amplifier IC3A and the output terminal of the amplifier IC 3A. The capacitor C50 and the capacitor C56 are used as filter capacitors and are connected in parallel in the circuit.

The control command input terminal mentioned above refers to a connection terminal of the human-machine interaction element 80 to the current setting circuit 70, which is used for inputting a control command. The given current value adjustment command input terminal refers to a connection terminal of the current giving circuit 70 and the adjusting circuit 60, which is used to output a given current.

Referring to fig. 6, an exemplary circuit diagram of the adjusting circuit 60 in the rust removing apparatus shown in fig. 2 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed as follows:

in an optional embodiment, the adjusting circuit includes a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a capacitor C11, a capacitor C12, a capacitor C13, a diode D11, a diode D12, a voltage regulator tube Z11, a power amplifier IC1B, a power amplifier IC1A, and a PWM control chip. Fig. 6 does not show the PWM control chip.

One end of the resistor R11 and one end of the resistor R12 are respectively connected to the two primary windings and the resistor R78, so as to be respectively connected to the intermediate-frequency high-voltage alternating-current signal fed back by the primary windings and the given current output by the current given circuit 70. The other end of the resistor R11 and the other end of the resistor R12 are connected in common and connected to the inverting input terminal of the power amplifier IC 1B. The resistor R14 is connected in series between the output end of the power amplifier IC1B and the non-inverting input end of the power amplifier IC 1A; the resistor R16 is connected in series between the output terminal of the power amplifier IC1A and the positive input terminal (the terminal is denoted by pin 3846-5 in fig. 3) of the error amplifier of the PWM control chip 3846, the control terminal of the PWM control chip 3846 is connected to the gate of the IGBT1, the gate of the IGBT2, the gate of the IGBT3, and the gate of the IGBT4 in the inverter unit 502, and the control terminal of the PWM control chip 3846 is configured to output the above-mentioned switching control signal to adjust the driving pulse widths of the IGBT1, the IGBT2, the IGBT3, and the IGBT 4. Fig. 6 does not show the PWM control chip.

Diode D11 and diode D12 are used to conduct transient currents in the circuit to ground. The resistor R13 and the capacitor C11 are connected in series between the inverting input end and the output end of the power amplifier IC1B, and the voltage regulator tube Z11 is connected in parallel with a series circuit of the resistor R13 and the capacitor C11. The capacitor C12 and the capacitor C13 are filter capacitors for filtering high-frequency interference waves in the circuit. One end of the resistor R15 is connected to the non-inverting input terminal of the power amplifier IC1A, and the other end is grounded.

To sum up, the utility model provides a rust cleaning device, intermediate frequency rectifier circuit carries out intermediate frequency rectification to the intermediate frequency low pressure alternating current signal of access after carrying out the intermediate frequency rectification respectively through positive output end and negative pole output direct current signal to nozzle and electrode, striking circuit output target frequency signal and with it coupling to the negative pole output, thereby make electrode discharge, puncture the gas between electrode and the nozzle, the ignition electric arc, lead to the compressed gas with certain flow between electrode and nozzle simultaneously, compressed gas spouts electric arc from the constrictive pore of nozzle, electric arc energy through the compression is more concentrated, gaseous abundant ionization in the arc post, thereby form high temperature plasma arc. The high-temperature and high-speed plasma arc acts on a rusty workpiece, and rusty stains on the surface of the workpiece are instantaneously expanded, deformed and crushed after being heated by the plasma arc and impacted by the plasma at a high speed, so that the surface of the workpiece is finally stripped, and the aim of removing rust is fulfilled. The rust removing device is a novel rust removing process, is not influenced by the size and the appearance of a workpiece to be subjected to rust removal, can easily, quickly and thoroughly clean rust on various workpieces, is high in efficiency, avoids mechanical friction from generating a large amount of harmful dust, is low in noise and environment-friendly, does not need a special rust removing field, and is low in cost and high in practicability.

Various embodiments are described herein for various devices. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A rust removing device characterized by comprising:

2. The rust removing device as claimed in claim 1, further comprising:

3. The rust removing device as claimed in claim 2, further comprising:

4. The rust removing apparatus as claimed in claim 3, wherein the control command includes an air pressure value adjusting command and/or a given current value adjusting command.

5. The rust removing device as claimed in claim 1, further comprising:

6. The rust removing apparatus as recited in claim 1, wherein the arc starting circuit comprises:

7. The rust removing device as recited in claim 2, wherein the power supply circuit comprises: