CN113019732A - High-precision spray gun spraying control system based on linear regulation - Google Patents
High-precision spray gun spraying control system based on linear regulation Download PDFInfo
- Publication number
- CN113019732A CN113019732A CN202110267595.7A CN202110267595A CN113019732A CN 113019732 A CN113019732 A CN 113019732A CN 202110267595 A CN202110267595 A CN 202110267595A CN 113019732 A CN113019732 A CN 113019732A
- Authority
- CN
- China
- Prior art keywords
- powder
- spray gun
- control
- air
- spraying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/081—Plant for applying liquids or other fluent materials to objects specially adapted for treating particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
- B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1683—Arrangements for supplying liquids or other fluent material specially adapted for particulate materials
Landscapes
- Nozzles (AREA)
Abstract
A high-precision spray gun spraying control system based on linear regulation comprises a spray gun, an electrostatic generator for supplying power to the spray gun and a powder pump for supplying powder to the spray gun, wherein an electric connector for connecting the electrostatic generator and a pipe connector for connecting the powder pump are arranged in the spray gun, the powder pump is connected with a powder storage box for sucking spraying powder, a first control valve for controlling the introduction of air flow and a second control valve for controlling the introduction of atomization air, an air pressure signal is fed back to the output end of the first control valve, the air flow stability of the first control valve is regulated by arranging the air pressure signal feedback at the output end of the first control valve, and in the invention, the spraying powder enters the powder pump under the condition that the air flow entering the powder pump generates negative pressure through the air flow, so that the quantity of the spraying powder entering the powder pump is very stable under the condition that the air flow entering the powder pump is stable, the gas-powder mixture delivered by the powder pump is also very stable, thus ensuring the stability of the operation of the spray gun.
Description
Technical Field
The invention relates to the technical field of spray gun spraying control systems, in particular to a high-precision spray gun spraying control system based on linear regulation.
Background
The working principle of the existing spray gun spraying control system is as follows: air flow, atomizing air and spraying powder are introduced into the powder pump through the control valve, the spraying powder and the atomizing air are fully mixed to form an air-powder mixture, the air-powder mixture flows out of the powder pump under the pushing of the air flow and is input into the spray gun, the spray gun is connected into the static electricity generating circuit, after the air-powder mixture is introduced into the spray gun, charged particles are formed and sprayed onto a workpiece, and finally, the charged spraying powder can be attached to the workpiece.
The working principle has the following defects: 1. the air flow introduced into the powder pump is influenced by air pressure of an air source, the external environment and the like, and the air flow fluctuates to a certain extent, so that the stability of the powder spray gun during working is low, the phenomenon of temporary powder spitting can occur, and the powder feeding rate of a workpiece is low;
2. the control valve of the existing spray gun spraying control system is not generally provided with a signal feedback adjusting function, air flow, atomization air and spraying powder introduced into the powder pump need to be manually adjusted in a balanced manner, the regulation and control difficulty is high, and the intelligent degree of the whole control system is low.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a high-precision spray gun spraying control system based on linear regulation.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a high accuracy spray gun spraying control system based on linear regulation and control, includes the spray gun, is used for the static generator of supplying power and is used for supplying the powder pump of powder for the spray gun, be equipped with the electricity that is used for connecting the static generator in the spray gun and connect the coupling that is used for connecting the powder pump, the powder pump is connected with the powder storage box that is used for absorbing the spraying powder, is used for controlling the first control valve that the air current lets in and is used for controlling the second control valve that atomizing gas lets in, the output of first control valve has atmospheric pressure signal feedback to first control valve, the static generator is connected with power controller and carries out power regulation control, first control valve, second control valve and power controller all connect total controller and carry out signal of telecommunication connection control.
In the invention, the first control valve comprises an electromagnetic valve, a pressure sensor and a control circuit, the output end of the control circuit is connected with the electromagnetic valve and controls the electromagnetic valve to work, the input end of the control circuit is connected with the pressure sensor and receives a detection signal of the pressure sensor, the airflow input end of the electromagnetic valve is connected with an air source, the airflow output end of the electromagnetic valve is connected with the pressure sensor and detects an air pressure value through the pressure sensor to carry out air pressure signal feedback regulation, and the first control valve is connected with the control circuit through the electromagnetic valve, the pressure sensor and the control circuit to form closed-loop control.
In the invention, the input electric signal of the control circuit is 1-5V, and the control circuit compares the input electric signal with the feedback signal of the pressure sensor to control the action of the electromagnetic valve so as to keep the output airflow pressure of the electromagnetic valve constant.
According to the invention, the powder pump comprises a pump body, a Venturi tube, a powder outlet tube head and a connecting piece, wherein the Venturi tube is inserted into the powder outlet tube head and sleeved in the powder outlet tube head, and the powder outlet tube head is inserted into the pump body and is locked and fixed through the connecting piece.
In the invention, the powder pump is provided with an air flow passage for connecting a first control valve to introduce air flow, an atomizing air passage for connecting a second control valve to introduce atomizing air, a powder passage for connecting a powder storage tank to introduce spraying powder and an air-powder passage for connecting a spray gun to output an air-powder mixture, the powder passage is arranged on one side of the air-powder passage and communicated with the air-powder passage, and the spraying powder in the powder storage tank is sucked into the air-powder passage by generating negative pressure through the air-powder passage.
In the invention, the Venturi tube comprises a front-section tube and a rear-section tube, the front-section tube and the rear-section tube are of split structures, the front-section tube is embedded and fixed in the powder outlet tube head, and the rear-section tube is detachably arranged in the powder outlet tube head.
In the invention, a plurality of atomizing holes for communicating the atomizing gas channel with the gas powder channel are formed in the powder outlet pipe head, an annular groove for communicating the atomizing gas channel is formed in the outer wall of the powder outlet pipe head in a surrounding manner, and the plurality of atomizing holes are distributed at intervals around the annular groove.
In the invention, a first sealing ring for atomizing and hermetically sealing is arranged between the powder outlet pipe head and the pump body.
In the invention, a second sealing ring is arranged between the venturi tube and the powder outlet tube head, and the second sealing ring is arranged at one end of the venturi tube extending into the pump body.
In the invention, the input electric signal of the control circuit and the opening of the electromagnetic valve are changed in linear proportion.
The invention has the beneficial effects that: according to the invention, the air flow stability of the first control valve is adjusted by setting air pressure signal feedback at the output end of the first control valve, and in the invention, spraying powder enters the powder pump under the condition that air flow enters the powder pump to generate negative pressure, so that the amount of the spraying powder entering the powder pump is very stable under the condition that the air flow entering the powder pump is stable, and therefore, an air-powder mixture output by the powder pump is also very stable, and the working stability of the spray gun is ensured.
Drawings
The invention is further illustrated by the following figures and embodiments:
FIG. 1 is a control schematic diagram of the present embodiment;
FIG. 2 is a schematic diagram of the powder pump according to the present embodiment;
FIG. 3 is a schematic structural view of the powder pump of this embodiment;
FIG. 4 is a schematic diagram of a first control valve according to the present embodiment;
FIG. 5 is a schematic structural diagram of the circuit assembly of this embodiment after the electrical connection is completed;
fig. 6 is a schematic structural diagram of the high-voltage packet completing the first layer encapsulation in this embodiment;
FIG. 7 is a schematic structural diagram of a second layer of encapsulation completed by the high voltage packet in the embodiment;
fig. 8 is a schematic structural diagram of the high voltage packet completing the third layer of packaging in this embodiment;
FIG. 9 is a linear control diagram illustrating the input electrical signal and the opening of the solenoid valve according to the present embodiment;
fig. 10 is a graph showing the flow rate of the powder pump in the ideal state of this embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example (b):
as shown in fig. 1 to 4, the embodiment discloses a high-precision spray gun spraying control system based on linear regulation, which comprises a spray gun 1, an electrostatic generator 2 for supplying power to the spray gun 1 and a powder pump 3 for supplying powder to the spray gun 1, the spray gun 1 is provided with an electric connector 4 for connecting the electrostatic generator 2 and a pipe connector 5 for connecting the powder pump 3, the powder pump 3 is connected with a powder storage box 6 for absorbing spraying powder, a first control valve 7 for controlling the introduction of air flow and a second control valve 8 for controlling the introduction of atomized gas, the output end of the first control valve 7 has air pressure signal feedback to the first control valve 7, the static generator 2 is connected with a power controller 9 for power regulation control, the first control valve 7, the second control valve 8 and the power controller 9 are all connected with a master controller 10 for electric signal connection control. In addition, in order to improve the overall control accuracy of the control system, the output end of the second control valve 8 may also be provided with an air pressure signal feedback regulation, so that the introduced atomizing air is also stably input. According to the invention, the air flow stability of the first control valve 7 is adjusted by setting air pressure signal feedback at the output end of the first control valve 7, and in the invention, spraying powder enters the powder pump 3 under the condition that air flow enters the powder pump 3 to generate negative pressure, so that the spraying powder enters the powder pump 3 in a very stable amount under the condition that the air flow entering the powder pump 3 is stable, and therefore, the air-powder mixture output by the powder pump 3 is also very stable, so that the working stability of the spray gun 1 is ensured.
In this embodiment, first control valve 7 includes solenoid valve 11, pressure sensor 12 and control circuit 13, solenoid valve 11 and the work of control solenoid valve 11 are connected to control circuit 13's output, pressure sensor 12 is connected to control circuit 13's input and receiving pressure sensor 12's detected signal, the air supply is connected to solenoid valve 11's air current input, solenoid valve 11's air current output is connected with pressure sensor 12 and detects the atmospheric pressure value through pressure sensor 12 and carries out atmospheric pressure signal feedback regulation, first control valve 7 is connected through solenoid valve 11, pressure sensor 12 and control circuit 13 and is formed closed-loop control. As shown in fig. 9 and 10, the input electric signal of the control circuit 13 is 1 to 5V, and the control circuit 13 controls the operation of the solenoid valve 11 by comparing the input electric signal with the feedback signal of the pressure sensor 12, so that the output airflow pressure of the solenoid valve 11 is kept constant. The input electric signal of the control circuit 13 is changed in linear proportion to the opening degree of the electromagnetic valve 11. The control circuit 13 divides the input electric signal into 100 equal parts to regulate the opening of the electromagnetic valve 11, so that the opening control precision of the electromagnetic valve 11 is improved, the control of the introduced air flow is more accurate, the air pressure value output from the electromagnetic valve 11 is converted into a voltage signal through the pressure sensor 12 and then fed back to the control circuit 13, the control circuit 13 compares the input value of the pressure sensor 12 with the input electric signal value, when the input value of the pressure sensor 12 is lower, the control circuit 13 performs voltage compensation and sends the compensation voltage to the electromagnetic valve 11, so that the opening of the electromagnetic valve 11 is increased, and the output air pressure value of the electromagnetic valve 11 is in accordance with the air pressure value corresponding to the input electric signal; when the input value of the pressure sensor 12 is high, the control circuit 13 consumes the voltage, and transmits the input electrical signal to the electromagnetic valve 11 after consuming the voltage accordingly, so as to reduce the opening of the electromagnetic valve 11, and thus the output air pressure value of the electromagnetic valve 11 matches the air pressure value corresponding to the input electrical signal. The working principle of the first control valve 7 is as follows: when the input electric signal is below 1V, the electromagnetic valve 11 does not act, and the air outlet of the electromagnetic valve 11 has no pressure; when the input electric signal is 1-5V, the first control valve 7 acts, the pressure of the air outlet is fed back to the control circuit 13 through the pressure sensor 12, the control circuit 13 compares the magnitude relation between the input electric signal and the feedback signal, and when the value of the feedback signal is low, the power is supplied to the electromagnetic valve 11, and the pressure of the air outlet is increased; when the value of the feedback signal is low, no power is supplied to the solenoid valve 11, and the pressure at the air outlet is reduced.
As a preferred embodiment, the powder pump 3 comprises a pump body 14, a venturi tube 15, a powder outlet head 16 and a connecting piece 17, wherein the venturi tube 15 is inserted into the powder outlet head 16 and sleeved in the powder outlet head 16, and the powder outlet head 16 is inserted into the pump body 14 and locked and fixed by the connecting piece 17. The powder pump 3 is provided with an air flow passage 18 for connecting the first control valve 7 to flow in air flow, an atomizing air passage 19 for connecting the second control valve 8 to flow in atomizing air, a powder passage 20 for connecting the powder storage box 6 to flow in spraying powder and an air powder passage 21 for connecting the air powder mixture output by the spray gun 1, the powder passage 20 is arranged on one side of the air powder passage 21 and communicated with the air powder passage 21, and the spraying powder in the powder storage box 6 is sucked into the air powder passage 21 through the negative pressure generated by the air powder passage 21. Venturi 15 includes front segment pipe 22 and back end pipe 23, front segment pipe 22 and back end pipe 23 adopt split type structure, and front segment pipe 22 embedding is fixed in a powder tube head 16, and back end pipe 23 demountable installation is in a powder tube head 16. By providing the venturi tube 15 as a separate structure, the use cost of the venturi tube 15 is reduced, because the venturi tube 15 plays a role of a wear member in the powder pump 3, the air flow, the atomizing air and the spraying powder are circulated in the venturi tube 15, the scouring abrasion to the venturi tube is large, and in the actual use process, because the inner end part of the venturi tube 15 is the inlet end of the air flow and the spraying powder, the flushing force on its end is greater, so that the end of the venturi tube 15 that enters the pump body 14 during use is generally more worn, and the end far away from the pump body 14 is less worn, so in order to reduce the use and replacement cost of the venturi tube 15, the venturi tube 15 is provided as two parts of a front-stage tube 22 and a rear-stage tube 23, the front section tube 22 is directly embedded and fixed in the powder outlet tube head 16, so that the abrasion is not required to be replaced, and the rear section tube 23 is only required to be replaced during replacement.
As a preferred embodiment, in order to improve the effect of introducing the atomizing gas, a plurality of atomizing holes 24 for communicating the atomizing gas passage 19 with the gas-powder passage 21 are formed in the powder outlet tube head 16, an annular groove for communicating the atomizing gas passage 19 is formed around the outer wall of the powder outlet tube head 16, the plurality of atomizing holes 24 are distributed at intervals around the annular groove, and the atomizing holes 24 of the structure also atomize around the powder outlet passage. A first sealing ring 25 for atomization air sealing is arranged between the powder outlet pipe head 16 and the pump body 14. Be equipped with second sealing washer 26 between venturi 15 and the play powder tube head 16, second sealing washer 26 is established in the one end that venturi 15 stretched into the pump body 14.
As shown in fig. 5 to 8, the spray gun 1 includes a spray gun housing 27 and a high voltage package 28 installed in the spray gun housing 27, a first packaging cavity 29 for accommodating the high voltage package 28 is provided in the spray gun housing 27, the high voltage package 28 is accommodated in the first packaging cavity 29 and fixed by filling a first insulating glue 30, the first insulating glue 30 wraps the whole high voltage package 28, the high voltage package 28 is accommodated in the first packaging cavity 29, a space gap flows out between the high voltage package 28 and the first packaging cavity 29, when the first insulating glue 30 is poured, the gap is filled, so that the high voltage package 28 is wrapped and fixed in the first packaging cavity 29, the high voltage package 28 includes a power supply access terminal 31, a conductive coil 32, a voltage doubling circuit 33, a current limiting circuit 34 and a needle 35, the voltage doubling circuit 33 includes a plurality of voltage boosting modules, the current limiting circuit 34 includes a plurality of current limiting modules, the voltage boosting modules and the current limiting modules are alternately connected in series to form a voltage transformation circuit 36 of the high voltage package 28, the power supply access end 31, the conductive coil 32, the transformation circuit 36 and the discharge needle 35 are sequentially connected in series to form a circuit assembly 37 of the high-voltage pack 28, the transformation circuit 36 and the outer wall of the part of the discharge needle 35 close to the transformation circuit 36 are coated with second insulating glue 38, the high-voltage pack 28 further comprises a high-voltage pack shell 39, the circuit assembly 37 is placed into the high-voltage pack shell 39 and is fixed by being injected with third insulating glue 40, and the third insulating glue 40 wraps the whole circuit assembly 37 coated with the second insulating glue 38. The high-voltage package 28 of the invention completely and perfectly encapsulates the circuit assembly 37 of the high-voltage package 28 in the spray gun shell 27 by a three-layer encapsulation mode, firstly, the transformation circuit 36 in the circuit assembly 37 and the outer wall of the partial discharge needle 35 close to the transformation circuit 36 are coated with the second insulating glue 38, because the partial voltage is at the voltage boosting stage and the output end after the voltage boosting, the voltage stability of the partial voltage is lower, therefore, the partial voltage is encapsulated firstly for the first layer, and simultaneously, the second layer encapsulation of the partial voltage is also taken as the basis to improve the sealing performance of the encapsulation of electronic components, after the first layer encapsulation is carried out, the third insulating glue 40 is poured into the whole circuit assembly 37 for the second layer encapsulation to form the high-voltage package 28 of the spray gun 1, and when the high-voltage package 28 is installed on the spray gun shell 27, the first insulating glue 30 is injected for the third layer encapsulation to carry out the omnibearing encapsulation on the whole high-, therefore, the occurrence of high-voltage breakdown is completely prevented, the service life of the high-voltage pack 28 is prolonged, and the use cost of the spray gun 1 is reduced.
In a preferred embodiment, in order to package the second layer of the high-voltage package 28 more uniformly, a second packaging cavity 41 for accommodating the circuit assembly 37 is arranged in the high-voltage package housing 39, a protruding point 42 for adjusting the packaging position of the circuit assembly 37 in the second packaging cavity 41 is arranged in the second packaging cavity 41, an insulating gasket 43 for adjusting the flatness of the overall package of the circuit assembly 37 is further arranged in the second packaging cavity 41, the insulating gasket 43 is flatly laid in the second packaging cavity 41, the protruding point 42 supports the bottom of the insulating gasket 43, and the circuit assembly 37 is packaged above the insulating gasket 43. Before the second insulating glue 38 is poured, the insulating gasket 43 is placed into the second packaging cavity 41, the circuit assembly 37 is flatly placed above the insulating gasket 43 and fixed at a predetermined position, and finally the second insulating glue 38 is injected into the second packaging cavity 41 for second-layer packaging. In addition, in order to quickly position the circuit assembly 37 during the second-layer packaging process, a recessed position corresponding to the outer contour of the circuit assembly 37 is formed on the insulating pad 43, and when the second-layer packaging process is performed, the circuit assembly 37 is correspondingly placed in the recessed position to be quickly positioned and mounted, so that the circuit assembly 37 is positioned in the middle of the second packaging cavity 41 after being installed.
As a preferred embodiment, in order to conveniently and quickly load the high-voltage package 28 into the first enclosure 29, the positioning groove 44 for loading and positioning the high-voltage package 28 when the high-voltage package 28 is loaded into the first enclosure 29 is arranged in the high-voltage package housing 39, and during installation, the high-voltage package 28 is only required to be inserted along the first enclosure 29 until the positioning groove 44 is matched with the corresponding positioning structure in the first enclosure 29, and the high-voltage package 28 is limited at the position, so that the high-voltage package 28 is completely loaded into the first enclosure 29, a gap between the periphery of the high-voltage package 28 and the first enclosure 29 is uniform, and the high-voltage package 28 is not deviated when being loaded, so that the packaging uniformity of the third layer of the high-voltage package 28 is improved.
In a preferred embodiment, the conductive coil 32 is composed of a magnetic core and a wire wound around the outside of the magnetic core. The end of the discharge needle 35 is connected with a power connection spring 45.
In order to expose the power inlet 31 during the third layer of packaging and facilitate the connection of the high-voltage bag 28 to an external power supply, a powder spraying chamber 46 is arranged in the spray gun housing 27, a partition plate 47 is arranged between the powder spraying chamber 46 and the first packaging chamber 29 for separation, a clamping groove 48 for clamping and fixing the power inlet 31 is formed in the partition plate 47, and the power inlet 31 is clamped and fixed through the clamping groove 48. Before the third layer of packaging, the two power supply access ends 31 are clamped in the clamping groove 48 and extend to the upper side of the powder spraying cavity 46 through the clamping groove 48, so that the power supply access ends 31 are prevented from influencing the third layer of packaging technology.
In addition, the embodiment also discloses a packaging process of the high-voltage package structure of the powder electrostatic spray gun, which comprises the following steps:
step one, a power supply access end 31, a conductive coil 32, a voltage transformation circuit 36 and a discharge needle 35 are connected in a circuit to form a circuit assembly 37;
coating second insulating glue 38 on the outer walls of the transformation circuit 36 and the partial discharge needles 35 close to the transformation circuit 36 in the circuit assembly 37 for first-layer packaging, so that the transformation circuit 36 is completely wrapped by the second insulating glue 38, and the partial discharge needles 35 close to the transformation circuit 36 are also wrapped by the second insulating glue 38; when coating second insulating cement 38, use the flexible brush to dip in and get second insulating cement 38, carry out comprehensive coating with corresponding part, treat second insulating cement 38 solidification back, reuse the flexible brush to dip in and get second insulating cement 38 and carry out the secondary coating, it is repeated many times, use and survey the membrane appearance and carry out thickness measurement, after the coating thickness of first insulating cement 30 reaches 800 mu m, accomplish first layer encapsulation, use the flexible brush to coat and to make the firm attached surface at electronic components of second insulating cement 38, the surface of second insulating cement 38 also can produce the line that some brushes brushed simultaneously, be convenient for going on of second layer packaging technology in the back technology, make third insulating cement 40 can be attached with the surface firmness of second insulating cement 38, the encapsulation compactness improves.
Step three, after the second insulating glue 38 in the step two is completely cured, the insulating gasket 43 is placed in the second packaging cavity 41, the second packaging cavity is installed and positioned through the convex point 42, then a layer of adhesive glue is coated in the concave position of the insulating gasket 43, the circuit assembly 37 processed in the step two is placed in the second packaging cavity 41, the corresponding concave position of the insulating gasket 43 is placed in the second packaging cavity 41 for quick positioning and adhesive fixing, third insulating glue 40 is injected to fill the second packaging cavity 41 for second layer packaging, the second insulating glue 38 completely wraps the circuit assembly 37, the power supply access end 31 extends out of the high-voltage packaging shell 39, the working efficiency of the second layer packaging process can be greatly improved through the mode, meanwhile, the product quality is ensured, firstly, the smoothness of the circuit assembly 37 can be ensured through placing the insulating gasket 43 in the second packaging cavity 41, the circuit assembly 37 is placed in the second packaging cavity 41 and cannot bend and deform due to no support at the bottom, while adjusting the position of the insulating spacer 43, and thus the packaging position of the circuit assembly 37, by providing the protrusion 42 at the bottom of the second packaging chamber 41; moreover, the insulation gasket 43 is provided with a concave position for quick installation and positioning, and is fixed by sticking glue, so that the circuit assembly 37 can be prevented from shifting in the second layer packaging and pouring process while being quickly positioned and installed;
step four, after the third insulating glue 40 in the step three is completely cured, vertically placing the spray gun shell 27, completely placing and fixing the high-voltage pack 28 obtained in the step three into the first packaging cavity 29, screwing a locking bolt into the end part of the high-voltage pack 28, wherein the locking bolt penetrates through the partition plate 47 to fix the high-voltage pack 28 into the first packaging cavity 29, so that the first insulating glue 30 is prevented from being injected into the first packaging cavity 29, the first insulating glue 30 floats the high-voltage pack 28 to cause the high-voltage pack 28 to be displaced, then injecting the first insulating glue 30 into the first packaging cavity 29 for third-layer packaging, the whole high-voltage pack 28 is completely wrapped by the third insulating glue 40, the power supply access end 31 is clamped in the clamping groove 48 and extends out of the third insulating glue 40, so that the power supply access end 31 is prevented from influencing the pouring of the first insulating glue 30, and the power supply access end 31 is also prevented from being wrapped by the first insulating glue 30 in the pouring process, affecting the access of an external power supply; in the packaging process, the spray gun shell 27 is vertically arranged, so that the first insulating glue 30 can be slowly filled along the first packaging cavity 29 under the action of gravity in the pouring process, and the operation convenience is high;
and step five, after the first insulating glue 30 in the step four is completely cured, completing the integral packaging of the high-voltage pack 28.
The insulating glue in the three-layer packaging process is packaged at normal temperature, and the circuit elements of the high-voltage package 28 are damaged in zero. The first insulating glue 30 and the third insulating glue 40 are made of the same insulating glue, the first insulating glue 30 and the third insulating glue 40 can be made of epoxy resin or organic silicon gel, and the curing shrinkage rate of the organic silicon gel is small, so that the organic silicon gel is good for frequency-sensitive products. The organic silicon gel and the epoxy resin have low viscosity and good fluidity, can easily reach each gap, can tightly package the coil, and the cured viscose has good elasticity and can absorb shock and impact. The electric insulation performance and the high and low temperature resistance of the organic silicon gel are better, and the electric shock resistance strength of the epoxy resin is good, so that the organic silicon gel can be suitable for different glue types according to different occasions.
The second insulating paste 38 is an insulating paste having high voltage resistance and thermal shock resistance, and a method for preparing the second insulating paste 38 is provided as follows:
firstly, preparing 20 parts of epoxy resin I with the epoxy value of 0.30, 11 parts of epoxy resin II with the epoxy value of 0.65, 4 parts of epoxy curing agent, 2 parts of accelerator and 15 parts of silane coupling agent, and further preparing an infrared spectrometer, a voltage breakdown resistance tester and a thermal conductivity tester;
secondly, hydrolyzing 15 parts of silane coupling agent to prepare a solution, adding 20 parts of epoxy resin I, 11 parts of epoxy resin II, 4 parts of epoxy curing agent and 2 parts of curing accelerator, and reacting in a reaction kettle with a stirring reflux device, wherein the temperature in the reaction kettle is not higher than 50 ℃, and meanwhile, the reaction process is accelerated by a stirring device;
thirdly, filtering the reacted mixture through a filter box, wherein the indoor temperature is not lower than 0 ℃ and not higher than 40 ℃ in the filtering process, and obtaining the second insulating glue 38 after the filtering is finished.
After the second insulating glue 38 is obtained, the molecular structure, the voltage breakdown resistance and the cold resistance of the second insulating glue are tested by an infrared spectrum analyzer, a thermal conductivity tester and a voltage breakdown resistance tester.
The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by substantially the same means are within the protection scope of the present invention.
Claims (10)
1. The utility model provides a high accuracy spray gun (1) spraying control system based on linear regulation and control which characterized in that: comprises a spray gun (1), an electrostatic generator (2) used for supplying power to the spray gun (1) and a powder pump (3) used for supplying powder to the spray gun (1), an electric connector (4) used for connecting the electrostatic generator (2) and a pipe joint (5) used for connecting the powder pump (3) are arranged in the spray gun (1), the powder pump (3) is connected with a powder storage box (6) for absorbing spraying powder, a first control valve (7) for controlling the introduction of air flow and a second control valve (8) for controlling the introduction of atomized gas, the output end of the first control valve (7) is provided with an air pressure signal which is fed back to the first control valve (7), the static generator (2) is connected with a power controller (9) for power regulation control, the first control valve (7), the second control valve (8) and the power controller (9) are all connected with a master controller (10) to perform electric signal connection control.
2. The high-precision spray gun (1) spraying control system based on linear regulation and control as claimed in claim 1, characterized in that: first control valve (7) include solenoid valve (11), pressure sensor (12) and control circuit (13), solenoid valve (11) and control solenoid valve (11) work are connected to the output of control circuit (13), pressure sensor (12) and receiving pressure sensor (12)'s detected signal are connected to the input of control circuit (13), the air supply is connected to the air current input of solenoid valve (11), the air current output of solenoid valve (11) is connected with pressure sensor (12) and detects the atmospheric pressure value through pressure sensor (12) and carries out atmospheric pressure signal feedback regulation, first control valve (7) are connected through solenoid valve (11), pressure sensor (12) and control circuit (13) and are formed closed loop control.
3. The high-precision spray gun (1) spraying control system based on linear regulation and control as claimed in claim 2, characterized in that: the input electric signal of the control circuit (13) is 1-5V, and the control circuit (13) compares the input electric signal with the feedback signal of the pressure sensor (12) to control the action of the electromagnetic valve (11), so that the output airflow pressure of the electromagnetic valve (11) is kept constant.
4. The high-precision spray gun (1) spraying control system based on linear regulation and control as claimed in claim 1, characterized in that: powder pump (3) are including the pump body (14), venturi (15), go out powder tube head (16) and connecting piece (17), venturi (15) insert out powder tube head (16) suit in going out powder tube head (16), it inserts in the pump body (14) and locks fixedly through connecting piece (17) to go out powder tube head (16).
5. The high-precision spray gun (1) spraying control system based on linear regulation and control as claimed in claim 4, characterized in that: be equipped with on powder pump (3) and be used for connecting first control valve (7) and let in airflow's air current passageway (18), be used for connecting second control valve (8) and let in atomizing air's atomizing air passageway (19), be used for connecting powder storage box (6) and let in powder passageway (20) of spraying powder and be used for connecting air powder passageway (21) that spray gun (1) exported the air-powder mixture, powder passageway (20) set up in one side and the intercommunication of air-powder passageway (21), the spraying powder in powder storage box (6) is inhaled through air-powder passageway (21) production negative pressure and is got in air-powder passageway (21).
6. The high-precision spray gun (1) spraying control system based on linear regulation and control as claimed in claim 4, characterized in that: venturi (15) are including preceding section pipe (22) and back end pipe (23), preceding section pipe (22) and back end pipe (23) adopt split type structure, and preceding section pipe (22) embedding is fixed in a powder tube head (16), and back end pipe (23) demountable installation is in a powder tube head (16).
7. The high-precision spray gun (1) spraying control system based on linear regulation and control of claim 5 is characterized in that: go out powder tube head (16) and go up and seted up a plurality of and be used for atomizing gas passageway (19) and atomizing hole (24) of gas powder passageway (21) intercommunication, the outer wall of going out powder tube head (16) encircles and offers the ring channel that is used for intercommunication atomizing gas passageway (19), and a plurality of atomizing hole (24) encircle ring channel a week interval distribution.
8. The high-precision spray gun (1) spraying control system based on linear regulation and control of claim 7 is characterized in that: a first sealing ring (25) used for atomization air sealing is arranged between the powder outlet pipe head (16) and the pump body (14).
9. The high-precision spray gun (1) spraying control system based on linear regulation and control of claim 8 is characterized in that: be equipped with second sealing washer (26) between venturi (15) and play powder tube head (16), second sealing washer (26) are established and are stretched into the one end of the pump body (14) in venturi (15).
10. A high accuracy spray gun (1) spray control system based on linear regulation according to claim 3 characterized in that: the input electric signal of the control circuit (13) and the opening degree of the electromagnetic valve (11) are changed in a linear proportional manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110267595.7A CN113019732B (en) | 2021-03-11 | 2021-03-11 | High-precision spray gun spraying control system based on linear regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110267595.7A CN113019732B (en) | 2021-03-11 | 2021-03-11 | High-precision spray gun spraying control system based on linear regulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113019732A true CN113019732A (en) | 2021-06-25 |
| CN113019732B CN113019732B (en) | 2022-09-23 |
Family
ID=76469938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110267595.7A Active CN113019732B (en) | 2021-03-11 | 2021-03-11 | High-precision spray gun spraying control system based on linear regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113019732B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413902A (en) * | 2015-12-09 | 2016-03-23 | 华南理工大学 | Electrostatic powder spraying controller and control method |
| CN105728218A (en) * | 2016-04-21 | 2016-07-06 | 张峰 | Electrostatic coating device of locomotive-mounted wheel rail friction control material |
| CN206286085U (en) * | 2016-12-16 | 2017-06-30 | 孙小武 | A kind of powdery paints delivery pump |
| CN107073496A (en) * | 2014-08-04 | 2017-08-18 | 瑞士金马有限公司 | Powder output device and powder coating equipment for carrying out powder spray to object |
| CN108714498A (en) * | 2018-06-11 | 2018-10-30 | 佛山市优正涂装科技有限公司 | The powder outlet quantity autocontrol method of electrostatic powder paint gun control system |
| CN209109432U (en) * | 2018-11-12 | 2019-07-16 | 佛山市纳博工业设备有限公司 | A kind of flow-rate adjustment pump of dust gun |
| CN209577081U (en) * | 2019-02-28 | 2019-11-05 | 轶川涂装(上海)有限公司 | A kind of powdery paints electrostatic gun |
-
2021
- 2021-03-11 CN CN202110267595.7A patent/CN113019732B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107073496A (en) * | 2014-08-04 | 2017-08-18 | 瑞士金马有限公司 | Powder output device and powder coating equipment for carrying out powder spray to object |
| CN105413902A (en) * | 2015-12-09 | 2016-03-23 | 华南理工大学 | Electrostatic powder spraying controller and control method |
| CN105728218A (en) * | 2016-04-21 | 2016-07-06 | 张峰 | Electrostatic coating device of locomotive-mounted wheel rail friction control material |
| CN206286085U (en) * | 2016-12-16 | 2017-06-30 | 孙小武 | A kind of powdery paints delivery pump |
| CN108714498A (en) * | 2018-06-11 | 2018-10-30 | 佛山市优正涂装科技有限公司 | The powder outlet quantity autocontrol method of electrostatic powder paint gun control system |
| CN209109432U (en) * | 2018-11-12 | 2019-07-16 | 佛山市纳博工业设备有限公司 | A kind of flow-rate adjustment pump of dust gun |
| CN209577081U (en) * | 2019-02-28 | 2019-11-05 | 轶川涂装(上海)有限公司 | A kind of powdery paints electrostatic gun |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113019732B (en) | 2022-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113019732B (en) | High-precision spray gun spraying control system based on linear regulation | |
| MX2010009887A (en) | Circuit board configuration for air- powered electrostatically aided spray gun. | |
| CN107617539A (en) | The weight feed control system and method for a kind of high viscosity material | |
| US3566833A (en) | Continuous coating apparatus | |
| CN111889251A (en) | Spraying process parameter control system of high-speed railway automobile body | |
| CA2459620A1 (en) | Powder transport method and apparatus | |
| CN202638641U (en) | Electrostatic fluidized powder coating equipment | |
| CN103480520B (en) | Electrostatic fluidised power coating equipment | |
| CN102019263B (en) | Three-loop plasma spray coating multifunctional atmosphere control device | |
| CN217963114U (en) | Modular mass spectrum matrix spraying device | |
| Weiss | Heatless trickle coating for the insulation of electrical windings | |
| CN113019729B (en) | High-voltage package structure of powder electrostatic spray gun and packaging process thereof | |
| JPS56155661A (en) | Generation of static electricity and apparatus therefor | |
| CN100443193C (en) | Powder film spraying machine | |
| CN209362807U (en) | Multi-nozzle special gun head for in-pipe spraying | |
| CN220836295U (en) | Power cable fireproof paint spraying device | |
| CN105703635B (en) | Integrated high voltage draw-out power supply and its assembling and installation method | |
| CN219785199U (en) | Improved spray gun for inner cavity powder feeding | |
| CN109772658A (en) | A kind of non-glue-coated surface coating technique of masking | |
| CN217906314U (en) | Sealing air guide structure of atomization device | |
| CN212069194U (en) | Bi-component spray gun for construction of electrical cabinet | |
| CN103184403A (en) | Plasma film-forming device | |
| CN217411145U (en) | Electrostatic powder spray gun with charge loading module | |
| CN219047310U (en) | Aerosol generating device | |
| CN214229845U (en) | Atomizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |