Spraying system with high-precision control

Abstract

The invention discloses a spraying system with high-precision control. The spraying system comprises an oil supply device, a pressure supply device, a spraying device and a controller module. The spraying device comprises a plurality of spraying guns; the pressure supply device is used for providing high-pressure airflow for the spray gun; the spray gun sprays oil under the action of high-pressure airflow; the oil supply device comprises an oil supply pipeline and an oil return pipeline. The oil supply pipeline is provided with a flow control valve, a pressure sensor, a flow sensor and a proportional valve which are electrically connected with the controller module. A switch-on extension timer is arranged in the controller module, delay time and timing advance time are set, and when pressure in the oil supply pipeline triggers the switch-on extension timer and triggers the timing advance time to start timing, the controller module controls the opening degree of a valve port of the proportional valve to reach a set value faster through cooperation of the timing advance time. The spraying system solves the problem that the spraying is not uniform when the pressure in the pipeline has an instantaneous value and jitters.

Description

Technical Field

[0001] The invention belongs to the field of spraying technology, and in particular relates to a spraying system with high-precision control. Background Art

[0002] Batteries are one of the development directions of new energy power batteries. In the field of battery manufacturing, UV paint spraying technology is mainly used to paint the battery shell to improve the appearance quality and corrosion resistance of the product. The battery shell is usually made of materials such as metal or plastic. UV paint spraying technology can provide it with a beautiful and durable coating. Although UV paint spraying technology has been widely used in the field of battery manufacturing, there are still many shortcomings in the existing technology, including uneven spraying of UV paint and inability to accurately control the amount of oil sprayed. In particular, due to the inevitable instantaneous value and jitter of the pressure in the oil supply pipeline and the air supply pipeline, it is impossible to control the spray gun to spray oil evenly, which affects the spraying quality and reduces the coating performance. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a spraying system with high-precision control.

[0004] The technical scheme of the present invention is: comprising an oil supply device, a pressure supply device, a spray device and a pipe network control system; the spray device comprises a plurality of spray guns; the pressure supply device is used to provide a high-pressure airflow to the spray guns; the spray guns spray oil under the action of the high-pressure airflow; the oil supply device comprises an oil supply pipeline and an oil return pipeline respectively connected to the spray guns, and the oil supply pipeline and the oil return pipeline are both provided with a liquid flow control device; the liquid flow control device comprises a flow control valve, a pressure sensor, a flow sensor and a proportional valve for adjusting the pressure and flow in the oil supply pipeline;

[0005] The pipe network control system includes a controller module, and the flow control valve, the pressure sensor, the flow sensor and the proportional valve are electrically connected to the controller module respectively;

[0006] The controller module is provided with an on-extended timer, and the delay time and the timing advance time are set in the controller module. The controller module monitors the pressure in the oil supply pipeline in real time through the pressure sensor. When the actual pressure value in the oil supply pipeline is different from the set value, the on-extended timer is triggered to start timing; at the same time, the timing advance time is triggered to start timing, and the timing advance time arrives earlier than the delay time. The controller module controls the valve opening of the proportional valve to reach the set value faster through the coordination of the timing advance time.

[0007] Its further technical solution is: the pipe network control system is also provided with a flow integration module, the controller module respectively monitors the flow in the oil supply pipeline and the oil return pipeline in real time through flow sensors, the flow integration module calculates the real-time spray flow of the spray gun through the monitoring data and the formula OUT=I N1 / I N2*I N3 / I N4+I N5; the pipe network control system compares the real-time spray flow with the preset flow, and then outputs a control signal through the controller module to control the valve opening of the proportional valve in real time.

[0008] A further technical solution is that the pressure supply device includes a heating device for heating the compressed air flow to a set temperature, and the outlet of the heating device transports the high-pressure hot air flow to each spray gun through an air supply pipeline.

[0009] A further technical solution is that an air flow control device is provided on the air supply pipeline, and the air flow control device includes an air path distributor and a switch solenoid valve, multiple sets of proportional valves and multiple sets of reversing valves.

[0010] Its further technical solution is: the switch solenoid valve is electrically connected to the controller module; when the air supply pipeline triggers the connection of the extension timer, the controller module starts to execute the delay operation, and after the end, controls the switch solenoid valve to return the spray gun to the open state.

[0011] Its further technical solution is: it also includes a hot water system, which includes a water bath cabinet and a water pipeline. The hot water in the water bath cabinet is transported to the waterproof layer of the oil supply barrel through the water pipeline, and then flows back to the water bath cabinet through the water pipeline.

[0012] A further technical solution is that: the liquid flow control device is provided with a plurality of groups, and the oil in the oil supply pipeline is divided by the angle valve diverter and then flows to the corresponding spray gun through each liquid flow control device.

[0013] Its further technical solution is: the oil supply device includes an oil supply barrel and a spare oil barrel, and a spare oil diaphragm pump is provided on the oil outlet side of the spare oil barrel, and the oil in the spare oil barrel is input into the oil supply barrel through the spare oil diaphragm pump.

[0014] Its further technical solution is: a paint stirrer is provided on the oil supply barrel, and the high-pressure air flow inlet of the paint stirrer is connected to the high-pressure air flow output port of the pressure supply device through an air supply pipe. Under the power of the high-pressure air flow, the piston movement of the paint stirrer drives the stirring blade at the output end of the piston to mix and stir the oil stored in the oil supply barrel.

[0015] The beneficial technical effects of the present invention are: by setting an on-extended timer in the controller module, the problem of uneven spraying caused by instantaneous pressure and jitter in the oil supply pipeline is solved; the system uses several spray guns to work simultaneously, and the spraying efficiency is high; by setting a flow integration module in the controller module, the control of the spraying amount is more accurate; by real-time monitoring of the oil supply pipeline and the air supply pipeline, the flow control valve and the switch solenoid valve are controlled in real time, and the system is efficient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the spraying device of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the oil supply device of the present invention;

[0019] Figure 4 It is a schematic structural diagram of the liquid flow control device of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the pressure supply device of the present invention;

[0021] Figure 6 It is a schematic diagram of the structure of the airflow control device of the present invention;

[0022] Figure 7 It is a ladder diagram of the controller module of the present invention when instantaneous value and jitter occur in the oil supply pipeline;

[0023] Figure 8 It is the instruction view of the flow totalization module of the present invention;

[0024] Fig. 9 It is a ladder diagram of the controller module of the present invention for accurately controlling the spraying amount of the spray gun;

[0025] Among them: 1. Oil supply device; 11. Oil supply barrel; 12. Spare oil barrel; 13. Oil supply pipeline; 14. Oil return pipeline; 15. Oil supply diaphragm pump; 16. Spare oil diaphragm pump; 17. Paint mixer; 18. Angle valve diverter; 19. Back pressure valve;

[0026] 2. Pressure supply device; 21. Airflow processor; 22. Heating device;

[0027] 3. Spraying device; 31. Spray gun;

[0028] 4. Liquid flow control device; 41. Flow control cabinet; 42. Flow control valve; 43. Flow sensor; 44. Temperature sensor;

[0029] 5. Hot water system; 51. Water bath cabinet;

[0030] 6. Air flow control device; 61. Air flow control cabinet; 62. Switch solenoid valve; 63. Proportional valve; 64. Reversing valve. DETAILED DESCRIPTION

[0031] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0032] like Figure 1 to Figure 2 As shown, a spraying system with high-precision control described in the present invention includes an oil supply device 1, a pressure supply device 2, a spraying device 3 and a pipe network control system; the spraying device 3 includes a plurality of spray guns 31 and a bracket 32 ​​supporting the plurality of spray guns 31.

[0033] The bracket 32 ​​is provided with a movable module 33 , and the spray gun 31 is arranged at a movable output end of the movable module 33 . The spray gun 31 is driven by the movable module 33 to move to a spraying working position.

[0034] The pressure supply device 2 is used to provide high-pressure airflow to the spray gun 31 and the oil supply device 1. The oil supply device 1 can transport oil to the spray gun 31 under the action of the high-pressure airflow, and the spray gun 31 can spray oil under the action of the high-pressure airflow; the oil supply device 1, the pressure supply device 2, and the spray device 3 are all electrically connected to the pipeline control system, and their operation is controlled by the pipeline control system.

[0035] like Figure 3 The oil supply device 1 includes an oil supply barrel 11 and a spare oil barrel 12 for storing oil, an oil supply pipeline 13 and an oil return pipeline 14 arranged between the oil supply barrel 11 and the spray gun 31, and a liquid flow control device 4 arranged on the oil supply pipeline 13 and the oil return pipeline 14; in this embodiment, the oil supply pipeline 13 is an insulated pipeline; the oil adopts UV paint.

[0036] Specifically, an oil supply diaphragm pump 15 and a backup oil diaphragm pump 16 are respectively provided on the oil outlet sides of the oil supply barrel 11 and the backup oil barrel 12. The oil supply diaphragm pump 15 and the backup oil diaphragm pump 16 have an oil supply air pressure regulating valve and a backup oil air pressure regulating valve at the high-pressure airflow inlet. Driven by the high-pressure airflow, the backup oil diaphragm pump 16 inputs the UV paint in the backup oil barrel 12 into the oil supply barrel 11 through the oil supply pipe 13 after passing through the filter; the oil supply diaphragm pump 15 transports the UV paint in the oil supply barrel 11 through the oil supply pipe 13 after passing through the filter and the pressure reducing valve, and adjusts the oil delivery flow rate through the liquid flow control device 4.

[0037] Furthermore, a paint mixer 17 is provided on the oil supply barrel 11 and the spare oil barrel 12. The piston output end of the paint mixer 17 is connected to a mixing blade via a connecting rod. The high-pressure airflow inlet of the paint mixer 17 is connected to the high-pressure airflow output port of the pressure supply device 2 via an air supply pipe. Under the power of the high-pressure airflow, the piston movement of the paint mixer 17 drives the mixing blade to mix and stir the UV paint stored in the oil supply barrel 11 and the spare oil barrel 12.

[0038] When several spray guns 31 work at the same time, the liquid flow control device 4 is also provided with multiple groups accordingly. An angle valve diverter 18 is provided on the oil supply pipeline 13 at the input side of the liquid flow control device 4. The UV paint in the oil supply pipeline 13 is diverted by the angle valve diverter 18, and the diverted UV paint is then fed to the corresponding spray gun 31 after passing through the corresponding liquid flow control device 4. At the same time, an angle valve diverter 18 is also provided on the output side of the liquid flow control device 4 on the return oil pipeline 14, which is used to collect the UV paint returned from the spray gun 31 and return it to the oil supply barrel 11. A back pressure valve 19 is provided on the return oil pipeline 14 near the oil supply barrel 11 to prevent the UV paint in the return oil pipeline 14 from flowing back and stabilize the pressure of the return oil pipeline 14.

[0039] Furthermore, a hot water system 5 is provided on the side of the oil supply barrel 11 and the spare oil barrel 12. The hot water system 5 includes a water bath cabinet 51 and a water supply pipeline. Pure water is injected into the water bath cabinet 51. After the pure water is heated by the water bath cabinet 51, the compressor transports the hot water through the water supply pipeline to the waterproof layer of the spare oil barrel 12 and the waterproof layer of the oil supply barrel 11 in sequence, and then flows back to the water bath cabinet 51 through the water supply pipeline to complete the heating of the UV paint in the oil supply barrel 11 and the spare oil barrel 12.

[0040] like Figure 4 As shown, the liquid flow control device 4 is arranged near the spray gun 31, including a flow control cabinet 41, and the oil supply pipeline 13 is penetrated by the flow control cabinet 41. The oil supply pipeline 13 located in the flow control cabinet 41 is provided with a flow control valve 42, a pressure sensor, a flow sensor 43 and a temperature sensor 44 in sequence along the oil conveying direction; similarly, the return oil pipeline 14 located in the flow control cabinet 41 is provided with a flow control valve 42, a pressure sensor, a flow sensor 43 and a temperature sensor 44 in sequence along the oil return direction.

[0041] like Figure 5The pressure supply device 2 includes an air compressor and an air flow processor 21 disposed at the output end of the air compressor. The air flow processor 21 is transported to the heating device 22 through the air supply pipeline to heat the compressed air flow to a set temperature. A plurality of air flow control devices 6 are also disposed in the air supply pipeline. In this embodiment, the heating device 22 is a heating tank, and an air path distributor is disposed at the outlet of the heating tank. The air path distributor is used to divert the high-pressure air flow to the oil supply device 1 and each liquid flow control device 4 and each air flow control device 6.

[0042] Specifically, the high-pressure airflow diverted to the oil supply device 1 is diverted to the spare oil barrel 12, the oil supply barrel 11, the paint mixer 17, the spare oil diaphragm pump 16 and the oil supply diaphragm pump 15 of the oil supply device 1 through another set of gas path distributors; a proportional valve 63 is also provided in the liquid flow control device 4, and the high-pressure airflow diverted to the liquid flow control device 4 is connected to the high-pressure airflow port of the corresponding flow control valve 42 after passing through each proportional valve 63. The flow control valve 42 is an electrically controlled pneumatic valve, and the flow control valve 42 is electrically connected to the pipe network control system. Under the power coordination of the high-pressure airflow, the pipe network control system can remotely control the paint force and discharge volume of the flow control valve 42, and keep the UV paint flow constant at the design value when the pressure difference of the system fluctuates, so as to make the paint pressure more uniform.

[0043] like Figure 6 As shown, the airflow control device 6 includes an airflow control cabinet 61, and an air path distributor and multiple valve groups are arranged in the airflow control cabinet 61. The multiple valve groups include a switch solenoid valve 62 for controlling the switch of the spray gun 31, a proportional valve 63, and a reversing valve 64 for controlling the amplitude and atomization of the spray gun 31. In this embodiment, the reversing valve 64 adopts a three-position four-way solenoid valve. The airflow output port of the air path distributor is connected to the switch solenoid valve 62 and the proportional valve 63 respectively, and the output end of the proportional valve 63 is connected to the air inlet of the three-position four-way solenoid valve.

[0044] In this embodiment, each spray gun 31 includes an oil inlet interface and an oil outlet interface respectively arranged on the upper and lower end surfaces, which are respectively used to connect the oil supply pipeline 13 and the oil return pipeline 14; an atomizing air inlet and a width air inlet are respectively provided on the side walls of the spray gun 31, and the atomizing air inlet and the width air inlet are respectively connected to the output ports of two three-position four-way solenoid valves through air supply pipelines.

[0045] The pipe network control system is used to control the spraying operation of the whole device, including a computer and a controller module. The controller module is electrically connected to the flow control valve 42, the flow sensor 43, the pressure sensor, and the proportional valve 63 in the liquid flow control device 4. The controller module monitors the data information of the flow sensor 43 and the pressure sensor in real time, and sends the data information to the computer to set the control algorithm. The computer sends the calculation output value to the controller module, and the controller module controls the flow control valve 42 according to the calculation output value to achieve accurate control of the flow rate.

[0046] The controller module is connected to the hot water system 5, monitors the data of the temperature sensor 44 in the flow control cabinet 41, sends the relevant data to the computer, and then controls the temperature of the hot water system 5 according to the signal fed back by the computer, so that the UV paint sprayed by the spray gun 31 reaches the set temperature value.

[0047] The controller module is electrically connected to the switch solenoid valve 62, the proportional valve 63 and the three-position four-way solenoid valve in the airflow control cabinet 61, and the controller module is electrically connected to the proportional valve 63 in the flow control cabinet 41. By reading the status information of the switch solenoid valve 62, the proportional valve 63 and the three-position four-way solenoid valve, it is determined whether the valve is in a normal state, otherwise the controller module will issue an alarm or take other measures. Ensure that the flow control valve 42 is in a normal working state, and ensure that the switch of the spray gun 31, the atomization effect of the spray gun 31 and the spray width are all in a normal state.

[0048] Specifically, the atomizing air pressure of the atomizing air inlet of the spray gun 31 can be adjusted through the proportional valve 63 in the air flow control cabinet 61 according to the flow rate of the oil inlet interface of the spray gun 31 to achieve uniform and fine atomization of the spray gun 31; and then the air pressure of the width air inlet can be adjusted through the proportional valve 63 in the air flow control cabinet 61 to achieve a suitable width.

[0049] By controlling the liquid flow control device 4 and the air flow control device 6 through the pipe network control system, the high-pressure gas pressure of the atomization air inlet and the width air inlet of the spray gun 31 is adjusted according to the oil supply flow rate, thereby improving the spraying quality.

[0050] Furthermore, during the spraying process, the spray gun 31 Figure 7As shown, when the UV paint flows in the oil supply pipeline 13, it is affected by many factors, and the pressure of the fluid in the oil supply pipeline 13 inevitably has instantaneous values ​​and jitters. In particular, when the spray gun is just turned on, the nozzle quickly accelerates to spray the oil, resulting in an instantaneous change in the oil pressure in the pipeline. These instantaneous changes and jitters will affect the spraying quality during the UV paint spraying process. Therefore, this embodiment adds an on-extended timer in the controller module and sets the delay time of the timer; when instantaneous values ​​and jitters appear, the pressure sensor on the oil supply pipeline 13 feeds data information back to the controller module and triggers the on-extended timer to start timing, and at the same time the controller module starts to perform the delay operation, the clock module inside the controller module starts timing, and continuously monitors the difference between the current time and the set delay time. If the set delay time has not yet been reached, the controller module continues to monitor and wait; when the clock module has reached the delay end state, the controller module will perform the corresponding operation or task according to the preset logic, and finally control the valve opening of the proportional valve 63 to reach the set value.

[0051] In order to ensure that the valve opening of the proportional valve 63 reaches the set value faster, in this embodiment, a timing advance time is also set according to the set delay time. When the extension timer is triggered and starts timing, the timing advance time is triggered at the same time and starts timing, and the timing advance time arrives earlier than the delay time, so that the controller module executes some operations or tasks in advance according to the timing advance time, so that when the set delay time is reached, the controller module can control the valve opening of the proportional valve 63 to reach the set value faster.

[0052] In this embodiment, a pressure sensor is provided on the air supply pipeline. The controller module monitors the pressure sensor in real time. When instantaneous values ​​and jitters appear in the air supply pipeline, the pressure sensor triggers the start of the extension timer, and the controller module starts to execute the delay operation. The clock module inside the controller module starts timing. The controller module monitors and waits until the clock module reaches the delay end state. The controller module continues to execute to put the switch solenoid valve 62 in the airflow control cabinet 61 in a normal working state, and at the same time controls the valve opening of the proportional valve 63 to be in a set state.

[0053] Furthermore, in order to accurately control the amount of oil sprayed, a flow integration module is also provided in the pipe network control system. The controller module monitors the real-time flow in the oil supply pipeline 13 and the oil return pipeline through the flow sensors 43 on the oil supply pipeline 13 and the oil return pipeline, respectively, and transmits the data to the computer, and then calculates the difference between the two through the computer, and calculates the real-time spray flow of the spray gun through the flow integration module. Specifically, Figure 8 and Fig. 9As shown, by adopting the formula OUT=IN1 / IN2*IN3 / I N4+I N5, that is, within the scanning cycle IN3, taking into account the instantaneous value I N1, the adjusted base I N4 is added to the accumulated flow IN5 within the cycle IN3 through the system adjustment to more accurately calculate the total flow OUT within the cycle I N3. The computer calculates the real-time spray flow of the spray gun 31 according to the total flow OUT and compares it with the preset flow. Then, the controller module outputs a control signal to control the valve opening of the proportional valve 63 in the flow control cabinet 41 in real time, and cooperates with the flow control valve 42 to adjust the pressure and flow of the oil supply pipeline 13, so as to finally achieve the purpose of accurately controlling the flow of the spray gun.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A spraying system with high-precision control, characterized in that: The invention comprises an oil supply device (1), a pressure supply device (2), a spray device (3) and a pipe network control system; the spray device (3) comprises a plurality of spray guns (31); the pressure supply device (2) is used to provide a high-pressure airflow to the spray guns (31); the spray guns (31) spray oil under the action of the high-pressure airflow; the oil supply device (1) comprises an oil supply pipeline (13) and an oil return pipeline (14) respectively connected to the spray guns (31); the oil supply pipeline (13) and the oil return pipeline (14) are both provided with a liquid flow control device (4); the liquid flow control device (4) comprises a flow control valve (42), a pressure sensor, a flow sensor (43) and a proportional valve (63) for adjusting the pressure and flow in the oil supply pipeline (13); The pipe network control system comprises a controller module, and a flow control valve (42), a pressure sensor, a flow sensor (43) and a proportional valve (63) are electrically connected to the controller module respectively; The controller module is provided with an on-extended timer, and a delay time and a timing advance time are set in the controller module. The controller module monitors the pressure in the oil supply pipeline (13) in real time through a pressure sensor. When the actual pressure value in the oil supply pipeline (13) is different from the set value, the on-extended timer is triggered to start timing; at the same time, the timing advance time is triggered to start timing, and the timing advance time arrives earlier than the delay time. The controller module controls the valve opening of the proportional valve (63) to reach the set value faster through the coordination of the timing advance time.

2. A spraying system with high precision control according to claim 1, characterized in that: The pipe network control system is also provided with a flow integration module. The controller module monitors the flow in the oil supply pipe (13) and the oil return pipe (14) in real time through the flow sensor (43). The flow integration module calculates the real-time spray flow of the spray gun (31) through the monitoring data and the formula OUT=IN1 / IN2*IN3 / IN4+IN5. The pipe network control system compares the real-time spray flow with the preset flow, and then outputs a control signal through the controller module to control the valve opening of the proportional valve (63) in real time.

3. A spraying system with high precision control according to claim 1, characterized in that: The pressure supply device (2) comprises a heating device (22) for heating the compressed air flow to a set temperature, and the outlet of the heating device (22) transports the high-pressure hot air flow to each spray gun (31) through an air supply pipeline.

4. A spraying system with high precision control according to claim 3, characterized in that: The air supply pipeline is provided with an air flow control device (6), and the air flow control device (6) comprises an air path distributor and a switch solenoid valve (62), multiple sets of proportional valves (63) and multiple sets of reversing valves (64).

5. A spraying system with high precision control according to claim 4, characterized in that: The switch solenoid valve (62) is electrically connected to the controller module; when the air supply pipeline triggers the extension timer, the controller module starts to execute the delay operation, and after the operation is completed, the switch solenoid valve (62) is controlled to return the spray gun (31) to the open state.

6. A spraying system with high precision control according to claim 1, characterized in that: It also includes a hot water system (5), which includes a water bath cabinet (51) and a water pipeline. The hot water in the water bath cabinet (51) is transported to the waterproof layer of the oil supply barrel (11) through the water pipeline, and then flows back to the water bath cabinet (51) through the water pipeline.

7. A spraying system with high precision control according to claim 1, characterized in that: The liquid flow control device (4) is provided with a plurality of groups, and the oil in the oil supply pipeline (13) is divided by the angle valve diverter (18) and then flows from each liquid flow control device (4) to the corresponding spray gun (31).

8. A spraying system with high precision control according to claim 1, characterized in that: The oil supply device (1) comprises an oil supply barrel (11) and a spare oil barrel (12); a spare oil diaphragm pump (16) is provided on the oil outlet side of the spare oil barrel (12); and the oil in the spare oil barrel (12) is input into the oil supply barrel (11) through the spare oil diaphragm pump (16).

9. A spraying system with high precision control according to claim 8, characterized in that: The oil supply barrel (11) is provided with a paint stirrer (17), and the high-pressure air flow inlet of the paint stirrer (17) is connected to the high-pressure air flow outlet of the pressure supply device (2) through an air supply pipeline. Under the power of the high-pressure air flow, the piston movement of the paint stirrer (17) drives the stirring blade at the piston output end to mix and stir the oil stored in the oil supply barrel (11).

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