Plasma cleaning machine and plasma arc spraying state monitoring device thereof

Abstract

The invention discloses a plasma cleaning machine and a plasma arc spraying state monitoring device thereof.The device comprises a fixing mechanism, a light guide part, an arc light detection head and a detection module, the fixing mechanism is configured to be connected with a body of the plasma cleaning machine, and the light guide part and the detection module are arranged on the fixing mechanism; the arc light detection head is arranged on the light guide part and is in communication connection with the detection module, one end of the light guide part is located on one side of the gun head nozzle and is close to the gun head nozzle, and when the gun head nozzle sprays arcs, under the action of the light guide part, the arc light detection head detects arc light, generates electric signals of different sizes based on different intensities of the arc light and transmits the electric signals to the detection module; the detection module is configured to be in communication connection with a cleaning machine processing module of the plasma cleaning machine, and when the gun head nozzle stably sprays the arc, the detection module generates a first output signal based on the electric signal and outputs the first output signal to the cleaning machine processing module. The plasma arc spraying state can be monitored in the whole process in the cleaning process of the plasma cleaning machine, and whether arc spraying is stable or not is confirmed in real time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plasma cleaning machine, in particular to a plasma cleaning machine and a plasma arc state monitoring device thereof. BACKGROUND

[0002] At present, in the industry of atmospheric plasma cleaning machine, the plasma arc state detection is mainly realized by the temperature sensor. Before cleaning, the nozzle sprays the arc to the temperature sensor. When the temperature sensor detects the temperature change, it indirectly judges that the plasma arc state is normal. However, the plasma cleaning machine cannot judge whether the arc is stable during the cleaning process. With the increasing quality requirements of the atmospheric plasma cleaning machine industry, it is necessary to directly monitor the plasma arc state of the plasma cleaning machine throughout the process. SUMMARY

[0003] The purpose of the present application is to provide a plasma cleaning machine and a plasma arc state monitoring device thereof, which can monitor the plasma arc state throughout the cleaning process of the plasma cleaning machine and confirm whether the arc is stable in real time.

[0004] In order to achieve the above purpose, the present application provides a plasma arc state monitoring device of a plasma cleaning machine, comprising: a fixing mechanism, a light guide, an arc detection head and a detection module, the fixing mechanism is configured to connect the body of the plasma cleaning machine, the light guide and the detection module are arranged on the fixing mechanism, the arc detection head is arranged on the light guide and is in communication connection with the detection module, one end of the light guide is located on one side of the nozzle of the plasma cleaning machine and is close to the nozzle, when the nozzle sprays the arc, the arc detection head detects the arc under the action of the light guide and generates different size electrical signals based on the intensity of the arc and transmits them to the detection module, the detection module is configured to be in communication connection with the cleaning machine processing module of the plasma cleaning machine, when the nozzle sprays the arc stably, the detection module generates a first output signal based on the electrical signal and outputs it to the cleaning machine processing module.

[0005] Optionally, one side of the fixing mechanism is configured to connect the nozzle of the plasma cleaning machine.

[0006] Optionally, the fixing mechanism comprises a fixing block and a clamping ring, the clamping ring is connected to one side of the fixing block, and the clamping ring is sleeved and fixed on the nozzle.

[0007] Optionally, the fixing mechanism comprises a fixing block and a cover plate, the fixing block forms a containing space, an opening is formed on the side of the containing space away from the nozzle, the detection module is arranged in the containing space, and the cover plate covers the opening.

[0008] Optionally, the bottom wall of the fixed block is provided with a protrusion, and a first through hole is formed in the protrusion; the light guide member is a light guide pipe, the light guide pipe is fixedly installed on one side of the protrusion close to the torch head through a connecting block, the connecting block is provided with a second through hole, one end of the light guide pipe away from the nozzle of the torch head is fixedly connected to one side of the connecting block corresponding to the second through hole, the other side of the connecting block is fixedly connected to the protrusion, the second through hole and the first through hole are correspondingly connected, and the arc detection head comprises a wire, the wire penetrates through the second through hole and the first through hole and then penetrates into the accommodation space to be connected with the detection module.

[0009] Optionally, the protrusion is formed on one side of the bottom wall of the fixed block close to the torch head; the fixing mechanism further comprises a clamping block, the clamping block is fixed to the bottom wall of the fixed block and located on one side of the protrusion away from the torch head; a wire channel is formed between the clamping block and the fixed block, a threading hole is formed in the cover plate, and the wire sequentially penetrates through the second through hole, the first through hole, the wire channel and the threading hole to enter the accommodation space.

[0010] Optionally, the light guide member is a light guide pipe, the arc detection head is arranged at one end of the light guide pipe away from the nozzle of the torch head, and the inner wall of the light guide pipe is a mirror surface capable of reflecting arc light to reflect the arc light to the arc detection head.

[0011] Optionally, the arc detection head is an arc detection sensor.

[0012] Optionally, the detection module comprises a monitoring end processing module and a relay, the arc detection head is connected with the monitoring end processing module through a first wire, the relay is connected with the cleaning machine processing module through a second wire, the monitoring end processing module receives a digital signal based on processing of the electric signal after receiving the electric signal, the monitoring end processing module is provided with a corresponding threshold value based on whether the nozzle of the torch head is stable arc spraying, different control signals are output by the monitoring end processing module based on comparison of the digital signal and the threshold value, under the action of different control signals, the relay outputs the first output signal to the cleaning machine processing module, or disconnects the connection with the cleaning machine processing module or outputs a second output signal to the cleaning machine processing module.

[0013] In order to achieve the above purpose, the application further provides a plasma cleaning machine, comprising: a plasma arc spraying state monitoring device, a torch head and a cleaning machine processing module as described above, the fixing mechanism is connected to the torch head, and the device end processing module is used to receive signals from the detection module.

[0014] In the embodiment of the present application, the plasma arc state monitoring device is directly arranged on the body of the plasma cleaning machine. When the gun head nozzle sprays arc, the light guide member can guide the arc light to the arc light detection head, so that the arc light detection head detects the arc light. The arc light detection head can generate different sizes of electrical signals based on different intensities of the detected arc light, that is, the intensity of the arc light and the size of the electrical signal have a correlation (positive or negative correlation), and the size of the electrical signal can reflect the intensity of the arc light. When the detection module receives the electrical signal, if the electrical signal reflects the stable arc spraying state of the gun head nozzle, the intensity of the arc light detected by the arc light detection head is stable, the detection module generates a first output signal to the cleaning machine processing module, and then the cleaning machine processing module can confirm that the current is in a stable arc spraying state, otherwise, it is in an abnormal state, such as arc breaking or unstable arc spraying. Therefore, the embodiment of the present application can monitor whether the plasma cleaning machine arc spraying state is stable, and can find abnormal conditions such as arc breaking and unstable arc spraying in real time to respond in time, and solve the problem of missing cleaning caused by arc spraying abnormity. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the gun head of the plasma cleaning machine and the plasma arc state monitoring device of the embodiment of the present application.

[0016] Figure 2 It is a three-dimensional structure schematic diagram of the plasma arc state monitoring device of the embodiment of the present application.

[0017] Figure 3 It is an exploded structure schematic diagram of the plasma arc state monitoring device of the embodiment of the present application.

[0018] Figure 4 It is another exploded structure schematic diagram of the plasma arc state monitoring device of the embodiment of the present application.

[0019] Figure 5 It is a three-dimensional structure schematic diagram of the arc light detection sensor and the light guide pipe of the embodiment of the present application.

[0020] Figure 6 It is a schematic block diagram of the arc light detection head, the detection module and the cleaning machine processing module of the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to explain the technical content, structural features, achieved purposes and effects of the present application in detail, the following will be described in detail in combination with the embodiments and the drawings.

[0022] Please refer to Figures 1 to 6 The embodiment of the present application discloses a plasma cleaning machine.

[0023] The plasma cleaning machine comprises a gun head 1, a cleaning machine processing module 2 and a plasma arc state monitoring device 3.

[0024] The bottom end of the torch head 1 has a torch head nozzle 9, and the torch head nozzle 9 performs arc spraying.

[0025] The plasma arc state monitoring device 3 comprises a fixing mechanism 30, a light guide 40, an arc detection head 50, and a detection module 60. The fixing mechanism 30 is configured to be connected to the torch head 1 of the plasma cleaning machine. The light guide 40 and the detection module 60 are arranged on the fixing mechanism 30. The arc detection head 50 is arranged on the light guide 40 and is in communication connection with the detection module 60. One end of the light guide 40 is located on one side of the torch head nozzle 9 of the plasma cleaning machine and is close to the torch head nozzle 9. When the torch head nozzle 9 sprays arc, under the action of the light guide 40, the arc detection head 50 detects the arc and generates electric signals of different sizes based on the intensity of the arc and transmits the electric signals to the detection module 60. The detection module 60 is configured to be in communication connection with the cleaning machine processing module 2 of the plasma cleaning machine. When the torch head nozzle 9 stably sprays arc, the detection module 60 generates a first output signal based on the electric signal and outputs the first output signal to the cleaning machine processing module 2.

[0026] It should be noted that the fixing mechanism 30 is not excluded from being arranged on other parts of the body of the plasma cleaning machine.

[0027] It should be noted that the definition of the light guide 40 being close to the torch head nozzle 9 only requires that the light guide 40 can receive the arc when the torch head nozzle 9 stably sprays arc.

[0028] In the embodiment of the present application, the plasma arc state monitoring device 3 is directly arranged on the body of the plasma cleaning machine. When the torch head nozzle 9 sprays arc, the light guide 40 can guide the arc to the arc detection head 50, so that the arc detection head 50 detects the arc. The arc detection head 50 can generate electric signals of different sizes based on the different intensities of the detected arc, that is, the intensity of the arc and the size of the electric signal have a correlation (positive or negative). The size of the electric signal can reflect the intensity of the arc. When the detection module 60 receives the electric signal, if the electric signal reflects the stable spraying state of the torch head nozzle 9, the intensity of the arc detected by the arc detection head 50 is stable, the detection module 60 generates a first output signal to the cleaning machine processing module 2, and then the cleaning machine processing module 2 can confirm that the current state is a stable spraying state, otherwise, it is in an abnormal state, such as arc breaking or unstable spraying state. It can be seen that the embodiment of the present application can monitor whether the plasma cleaning machine is in a stable spraying state, and can find abnormal conditions such as arc breaking and unstable spraying in real time to respond in time, and solve the problem of missing cleaning caused by abnormal spraying.

[0029] It should be noted that the "real-time discovery of abnormal conditions such as arc breaking and unstable arc" here does not mean that the specific abnormal state such as arc breaking state can be identified, but that the state outside the stable arc can be found. Of course, it can also be set as needed to identify the specific abnormal state.

[0030] It can be understood that when the gun nozzle 9 is in stable arc, the detection module 60 outputs the first output signal to the cleaning machine processing module 2 based on the electric signal, and in other abnormal conditions such as unstable arc or arc breaking state, the detection module 60 will not output signal to the cleaning machine processing module 2, or will output different from the first output signal to the cleaning machine processing module 2, so that the cleaning machine processing module 2 can find the arc abnormality and make a response, such as issuing an alarm prompt.

[0031] In some embodiments, the detection module 60 includes a monitoring end processing module 61 and a relay 62, the arc detection head 50 is connected with the monitoring end processing module 61 through the first wire 51, the relay 62 is connected with the cleaning machine processing module 2 through the second wire 63, the monitoring end processing module 61 receives the electric signal and processes the digital signal based on the electric signal, the monitoring end processing module 61 has a corresponding threshold value based on whether the gun nozzle 9 is in stable arc, based on the comparison of the digital signal and the threshold value, the monitoring end processing module 61 outputs different control signals (outputs the first control signal within the threshold value, and outputs the second control signal outside the threshold value), under the action of different control signals, the relay 62 outputs the first output signal to the cleaning machine processing module 2, or disconnects the connection with the cleaning machine processing module 2 or outputs the second output signal to the cleaning machine processing module 2.

[0032] It should be noted that how to set the threshold value can be tested multiple times in advance: stable arc is performed, which contains the upper and lower boundaries of stable arc, the arc detection head 50 generates an electric signal based on the detected arc light and transmits it to the monitoring end processing module 61, the monitoring end processing module 61 processes the digital signal based on the electric signal, which includes the digital signal corresponding to the upper and lower boundaries of stable arc, and then the digital signal can be set as the threshold value. Subsequently, in the detection, the digital signal outside the threshold value can be considered as the digital signal obtained based on the abnormal state outside the unstable arc.

[0033] Specifically, the triggering end of the relay 62 can be in a setting circuit, the common end of the relay 62 can be connected with the cleaning machine processing module 2, the setting circuit can be closed when the monitoring end processing module 61 outputs the first control signal, at this time, the common end of the relay 62 can be connected with the first end of the relay 62, so that the relay 62 can output the first output signal to the cleaning machine processing module 2, the setting circuit can be disconnected when the monitoring end processing module 61 outputs the second control signal, at this time, the common end of the relay 62 can be connected with the second end of the relay 62, so that the relay 62 can output the second output signal to the cleaning machine processing module 2 or disconnect the communication connection with the cleaning machine processing module 2. The detection module 60 can be realized by an existing module, which will not be described here.

[0034] The arc detection head 50 can be an arc detection sensor. The detection module 60 can adopt an existing light sensing switch module, which will not be described further here.

[0035] In some embodiments, the fixing mechanism 30 includes a fixing block 31 and a clamping ring 32, the clamping ring 32 is connected to one side of the fixing block 31, and the clamping ring 32 is sleeved and fixed on the gun head 1. Based on the combination of the clamping ring 32 and the gun head 1, the reliable installation of the plasma arc state monitoring device 3 is realized.

[0036] In some embodiments, the fixing mechanism 30 includes a fixing block 31 and a cover plate 34, the fixing block 31 forms a containing space 311, the containing space 311 is formed with an opening 312 on the side away from the gun head 1, the detection module 60 is arranged in the containing space 311, and the cover plate 34 covers the opening 312.

[0037] Specifically, the bottom wall of the fixing block 31 is provided with a protruding portion 313, and the protruding portion 313 is formed with a first through hole 314; the light guide member 40 is a light guide tube 40, the light guide tube 40 is fixedly installed on the side of the protruding portion 313 close to the gun head 1 through a connecting block 33, the connecting block 33 is formed with a second through hole 331, one end of the light guide tube 40 away from the gun nozzle 9 is fixedly connected to the side of the connecting block 33 corresponding to the second through hole 331, the other side of the connecting block 33 is fixedly connected to the protruding portion 313, the second through hole 331 and the first through hole 314 are correspondingly communicated, the arc detection head 50 includes a wire 51, the wire 51 penetrates into the containing space 311 after penetrating through the second through hole 331 and the first through hole 314 and is connected with the detection module 60.

[0038] More specifically, the convex part 313 is formed with the side of the bottom wall of the fixing block 31 close to the gun head 1; the fixing mechanism 30 further comprises a clamping block 35 fixed to the bottom wall of the fixing block 31 and located at the side of the convex part 313 away from the gun head 1; a wire channel A is formed between the clamping block 35 and the fixing block 31, a wire hole 341 is formed on the cover plate 34, and the lead wire 51 passes through the second through hole 331, the first through hole 314, the wire channel A and the wire hole 341 in sequence into the accommodation space 311.

[0039] In some embodiments, the light guide 40 is a light guide tube 40, the arc light detection head 50 is arranged at the end of the light guide tube 40 away from the gun head nozzle 9, and the inner wall of the light guide tube 40 is a mirror surface capable of reflecting the arc light to reflect the arc light to the arc light detection head 50.

[0040] The above only discloses the preferred embodiments of the present application, and of course cannot limit the scope of the present application, so the equivalent changes made in the patent application scope of the present application still belong to the scope covered by the present application.

Claims

1. A device for monitoring the state of a plasma jet of a plasma cleaning machine, characterized in that The application relates to an arc light detection device for a plasma cleaning machine. One side of the fixing mechanism is configured to be connected with a gun head of the plasma cleaning machine.

2. The plasma torch condition monitoring apparatus of claim 1, wherein, The fixing mechanism comprises a fixing block and a clamping ring, the clamping ring is connected to one side of the fixing block, and the clamping ring is sleeved and fixed on the gun head.

3. The plasma torch condition monitoring apparatus of claim 2, wherein, The fixing mechanism comprises a fixing block and a cover plate, the fixing block forms a containing space, an opening is formed on the side, away from the gun head, of the containing space, the detection module is arranged in the containing space, and the cover plate covers the opening.

4. The plasma torch condition monitoring apparatus of claim 2, wherein, A convex portion is formed on the bottom wall of the fixing block, a first through hole is formed in the convex portion, the light guide piece 40 is a light guide pipe, the light guide pipe is fixedly installed on the side, close to the gun head, of the convex portion through a connecting block, the connecting block forms a second through hole, one end of the light guide pipe, away from the gun head nozzle, is fixedly connected to one side of the connecting block in correspondence with the second through hole, the other side of the connecting block is fixedly connected to the convex portion, the second through hole and the first through hole are in correspondence and communication, the arc light detection head comprises a wire, the wire penetrates into the containing space and is connected with the detection module after penetrating through the second through hole and the first through hole.

5. The plasma torch condition monitoring apparatus of claim 4, wherein, The convex portion is formed on the side, close to the gun head, of the bottom wall of the fixing block, the fixing mechanism further comprises a clamping block, the clamping block is fixed to the bottom wall of the fixing block and is located on the side, away from the gun head, of the convex portion, a wire channel is formed between the clamping block and the fixing block, a wire penetrating hole is formed in the cover plate, and the wire sequentially penetrates through the second through hole, the first through hole, the wire channel and the wire penetrating hole and enters the containing space.

6. The plasma torch condition monitoring apparatus of claim 5, wherein, The light guide piece is a light guide pipe, the arc light detection head is arranged at one end of the light guide pipe, away from the gun head nozzle, and the inner wall of the light guide pipe is a mirror surface capable of reflecting arc light so as to reflect the arc light to the arc light detection head.

7. The plasma torch operating condition monitoring apparatus of claim 1 wherein, The arc light detection head is an arc light detection sensor.

8. The plasma torch operating condition monitoring apparatus of claim 1 wherein, ​ 9. The plasma torch operating condition monitoring apparatus of claim 1 wherein, The detection module comprises a monitoring terminal processing module and a relay, the arc detection head is connected with the monitoring terminal processing module through a first lead wire, the relay is connected with the cleaning machine processing module through a second lead wire, the monitoring terminal processing module receives the electric signal and processes a digital signal based on the electric signal, the monitoring terminal processing module is preset with a corresponding threshold value based on whether the gun head nozzle is stable arc spraying, based on the comparison between the digital signal and the threshold value, the monitoring terminal processing module outputs different control signals, under the action of different control signals, the relay outputs the first output signal to the cleaning machine processing module, or disconnects the connection with the cleaning machine processing module or outputs the second output signal to the cleaning machine processing module.

10. A plasma cleaning machine characterised in that, Comprise: The plasma arc state monitoring device, the gun head and the cleaning machine processing module according to any one of claims 1 to 9, the fixing mechanism is connected on the gun head, and the equipment terminal processing module is used for receiving the signal from the detection module.

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