A multi-sided spraying device for sheet metal parts

Abstract

This utility model discloses a multi-sided spraying device for sheet metal parts, belonging to the field of sheet metal part spraying technology. It solves the problem of excess paint dripping onto the ground and wasting paint when manually spraying paint onto sheet metal parts using a spray gun. The device includes a frame and a recycling tank fixedly connected to the bottom of the frame. After hanging the sheet metal part on the hook and closing the door slot, the operator presses the start button. The working circuit starts, and the rotating component drives the spraying component to rotate forward and backward. Simultaneously, the spraying component draws in and sprays paint, ensuring it adheres evenly to the sheet metal part. Excess paint drips into the recycling tank. A liquid level detection module monitors the paint level. When the level exceeds the upper limit, the working circuit opens the solenoid valve and increases the pump power to recycle the paint. When the paint level falls below the lower limit, the solenoid valve closes and the pump returns to normal power, completing the paint recycling process.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal spraying technology, and in particular to a multi-sided spraying device for sheet metal parts. Background Technology

[0002] Sheet metal parts spraying is a key surface treatment process. First, pretreatment such as degreasing and rust removal is performed, followed by electrostatic spraying of powder or liquid coatings, and finally baking and curing to form a tough coating. It enhances both protective and decorative effects and is widely used in automobiles, home appliances, machinery, and other fields, ensuring product appearance and durability.

[0003] Currently, when painting sheet metal parts, the sheet metal parts are usually suspended and then the paint is sprayed onto the surface of the sheet metal parts manually using a spray gun. However, excess paint sprayed on the sheet metal parts will drip directly onto the ground, which will result in paint waste.

[0004] Therefore, a multi-sided spraying device for sheet metal parts is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a multi-sided spraying device for sheet metal parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-sided spraying device for sheet metal parts includes a frame, a recycling tank fixedly connected to the bottom of the frame, a top plate fixedly connected to the top surface of the frame, a housing fixedly connected to the outside of the frame, a suspension assembly extending through the top plate into the frame, a rotating assembly rotatably disposed outside the suspension assembly, and a spraying assembly disposed at the bottom of the rotating assembly. The housing is disposed on the outside of the frame. The spraying assembly is connected to the recycling tank, and a T-joint and a pump body are connected along the communication path between the spraying assembly and the recycling tank. The T-joint can guide external paint into the tank. The rotating assembly and the spraying assembly are coupled to a working circuit. The working circuit controls the on / off setting of the connection between the recycling tank and the spraying assembly, and controls the reciprocating rotation of the rotating assembly and controls the operation of the spraying assembly.

[0008] Preferably, a connecting frame is fixedly connected to the top of the housing, and the upper end of the suspension assembly is fixedly connected to the connecting frame. The suspension assembly includes a connecting rod and a hook fixedly connected to the lower end of the connecting rod. The connecting rod passes through the top plate into the frame.

[0009] Preferably, the rotating assembly includes a connecting sleeve sleeved on the outside of the connecting rod and extending through the top plate, a turntable fixedly connected to the lower end of the connecting sleeve and sleeved on the outside of the connecting rod, a driven disc fixedly connected to the upper end of the connecting sleeve and located on the outside of the connecting rod, and a drive motor fixedly connected to the connecting frame and arranged vertically. The rotor shaft of the drive motor is fixedly connected to an active disc that is drively connected to the driven disc.

[0010] Preferably, the spraying assembly includes a vertical pipe fixedly connected to the bottom of the turntable, spray nozzles connected to the vertical pipe and evenly spaced along its height, and a movable pipe penetrating the turntable and connected to the upper end of the vertical pipe. The top plate has a near-annular groove with an arc angle of less than 360°. The movable pipe passes through the near-annular groove and slides therein. The upper end of the movable pipe is connected to a metal corrugated pipe through a rotary pipe joint. The recovery tank is connected to a recovery pipe that penetrates the casing. The recovery pipe is connected to a solenoid valve. The solenoid valve, a three-way connector, and a pump body are connected in sequence. The pump body is connected to the metal corrugated pipe. The third end of the three-way connector is used to allow external paint to enter. The solenoid valve and the pump body are coupled to the working circuit.

[0011] Preferably, the bottom of the frame is fixedly connected to several bases, and a door groove is opened on one side of the casing, with a sealing plate detachably connected inside the door groove.

[0012] Preferably, the working circuit includes a power supply module, a main control module, a motor control module, a liquid level detection module, and an actuator module;

[0013] The power supply module supplies power to the main control module, liquid level detection module, actuator module, and motor control module. The trigger signal input terminal of the main control module is connected to the start button, and the output terminal of the main control module is connected to the control terminal of the actuator module. The main control module controls the power supply of the actuator module. The motor control module receives the enable signal from the main control module, and the output terminal of the motor control module is connected to the input terminal of the actuator module. The output terminal of the liquid level detection module is connected to the input terminal of the actuator module. The actuator module controls the power of the pump body, the on / off state of the solenoid valve, and the forward and reverse rotation of the drive motor.

[0014] Preferably, the main control module includes a first 555 timer, an adjustable resistor, a first capacitor, a second capacitor, and a main relay;

[0015] The trigger pin of the first 555 timer is connected in series with the start button and then grounded. The threshold pin and discharge pin of the first 555 timer are connected to an adjustable resistor and a first capacitor and then grounded. The output pin of the first 555 timer is connected to one end of the main relay. The reset pin of the first 555 timer is connected to the power supply module. The control voltage pin of the first 555 timer is connected in series with a second capacitor and then grounded. The other end of the main relay is grounded, and one end of the normally open contact of the main relay is connected to the power supply module. The other end of the normally open contact of the main relay is connected to the power supply terminal of the actuator module.

[0016] Preferably, the motor control module includes a second 555 timer, a first resistor, a second resistor, a third capacitor, and an inverter;

[0017] The trigger pin and threshold pin of the second 555 timer are connected to ground via a first resistor, a second resistor, and a third capacitor in series. The output pin of the second 555 timer is connected to the input of an inverter.

[0018] Preferably, the liquid level detection module includes a first comparator LM393, a second comparator LM393, an upper limit electrode for liquid level, a lower limit electrode for liquid level, a first voltage divider network, a second voltage divider network, a common electrode for liquid level, and a third resistor, a fourth resistor, and a fifth resistor.

[0019] The non-inverting input of the first comparator LM393 is connected to the voltage divider point of the first voltage divider network. The inverting input of the first comparator LM393 is connected in series with a third resistor and then connected to the upper limit electrode of the liquid level. The output of the first comparator LM393 is connected to the input of the actuator module. The non-inverting input of the second comparator LM393 is connected in series with a fourth resistor and then connected to the lower limit electrode of the liquid level. The inverting input of the second comparator LM393 is connected to the voltage divider point of the second voltage divider network. The output of the second comparator LM393 is connected to the input of the actuator module. The common electrode of the liquid level is grounded in series with a fifth resistor. The upper limit electrode and the lower limit electrode are set in the recovery tank. The first voltage divider network includes a first voltage divider resistor and a second voltage divider resistor connected in series. The voltage division point between the first voltage divider resistor and the second voltage divider resistor is connected to the non-inverting input terminal of the first comparator LM393. The other end of the first voltage divider resistor is energized, and the other end of the second voltage divider resistor is grounded. The second voltage divider network includes a third voltage divider resistor and a fourth voltage divider resistor connected in series. The voltage division point between the third voltage divider resistor and the fourth voltage divider resistor is connected to the inverting input terminal of the second comparator LM393. The other end of the third voltage divider resistor is energized, and the other end of the fourth voltage divider resistor is grounded.

[0020] Preferably, the actuator module includes a power relay, a valve relay, and a double-pole double-throw relay group;

[0021] One end of the power relay is connected to the output of the second comparator LM393, and the other end of the power relay is grounded. One end of the normally open contact of the power relay is connected to the power module, and the other end of the normally open contact of the power relay is connected to the positive terminal of the motor in the pump body. One end of the normally closed contact of the power relay is connected to the power module, and the other end of the normally closed contact of the power relay is connected to the positive terminal of the motor in the pump body after being connected in series with a current-limiting resistor. The negative terminal of the motor in the pump body is grounded. One end of the valve relay is connected to the output of the first comparator LM393, and the other end of the valve relay is grounded. One end of the normally open contact pin of the valve relay is connected to the voltage module, and the other end of the normally open contact pin of the valve relay is connected to the positive terminal of the solenoid valve. The negative terminal of the solenoid valve is grounded. One end of the first relay in the double-pole double-throw relay group is connected to the output pin of the second 555 timer, and the other end of the first relay in the double-pole double-throw relay group is grounded. One end of the contact pin of the first relay in the double-pole double-throw relay group is connected to the U terminal of the drive motor, and the other end of the contact pin of the first relay in the double-pole double-throw relay group is connected to the power supply module. One end of the second relay in the double-pole double-throw relay group is connected to the output terminal of the inverter, and the other end of the second relay in the double-pole double-throw relay group is grounded. One end of the contact pin of the second relay in the double-pole double-throw relay group is connected to the V terminal of the drive motor, and the other end of the contact pin of the second relay in the double-pole double-throw relay group is grounded. The common terminal of the drive motor is grounded.

[0022] This utility model has the following beneficial effects:

[0023] After the operator hangs the sheet metal part on the hook and closes the door slot, they press the start button. The working circuit starts, and the rotating component drives the spraying component to rotate back and forth. At the same time, the spraying component draws in and sprays paint, making it evenly adhere to the sheet metal part. Excess paint drips into the recycling tank. The liquid level detection module detects the amount of paint. When it exceeds the upper limit, the working circuit opens the solenoid valve and increases the pump power to recycle the paint. When the amount of paint is lower than the lower limit, the solenoid valve closes and the pump power returns to normal, completing the paint recycling. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an exploded view of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of this utility model;

[0027] Figure 3 This is a structural block diagram of the working circuit in this utility model.

[0028] 1. Base; 2. Frame; 3. Recycling tank; 4. Top plate; 5. Near-circular groove; 6. Vertical pipe; 7. Nozzle; 8. Movable pipe; 9. Rotary pipe joint; 10. Corrugated metal pipe; 11. T-joint; 12. Pump body; 13. Solenoid valve; 14. Connecting rod; 15. Hook; 16. Passive disc; 17. Connecting sleeve; 18. Connecting frame; 19. Drive motor; 20. Active disc; 21. Housing; 22. Door groove; 23. Sealing plate; 24. Power module; 25. Main control module; 26. Motor control module; 27. Liquid level detection module; 28. Actuator module. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] A multi-sided spraying device for sheet metal parts, such as Figure 1 and Figure 2 As shown, the system includes a frame 2, a recycling tank 3 fixedly connected to the bottom of the frame 2, a top plate 4 fixedly connected to the top surface of the frame 2, a housing 21 fixedly connected to the outside of the frame 2, a suspension assembly penetrating the top plate 4 and installed inside the frame 2, a rotating assembly rotatably installed outside the suspension assembly, and a spraying assembly installed at the bottom of the rotating assembly. The housing 21 is installed on the outside of the frame 2, and several bases 1 are fixedly connected to the bottom of the frame 2. A door groove 22 is opened on one side of the housing 21, and a sealing plate 23 is detachably connected inside the door groove 22. The spraying assembly is connected to the recycling tank 3, and a three-way connector 11 and a pump body 12 are connected in the communication path between the spraying assembly and the recycling tank 3. The three-way connector 11 can guide external paint into the tank. The rotating assembly and the spraying assembly are coupled with a working circuit. The working circuit controls the on / off setting of the connection between the recycling tank 3 and the spraying assembly, and controls the reciprocating rotation of the rotating assembly and controls the operation of the spraying assembly.

[0036] The top of the housing 21 is fixedly connected to the connecting frame 18, and the upper end of the suspension assembly is fixedly connected to the connecting frame 18. The suspension assembly includes a connecting rod 14 and a hook 15 fixedly connected to the lower end of the connecting rod 14. The connecting rod 14 passes through the top plate 4 into the frame 2.

[0037] The rotating assembly includes a connecting sleeve 17 sleeved on the outside of the connecting rod 14 and extending through the top plate 4, a turntable fixedly connected to the lower end of the connecting sleeve 17 and sleeved on the outside of the connecting rod 14, a driven disc 16 fixedly connected to the upper end of the connecting sleeve 17 and located on the outside of the connecting rod 14, and a drive motor 19 fixedly connected to the connecting frame 18 and vertically arranged. The rotor shaft of the drive motor 19 is fixedly connected to an active disc 20 that is drively connected to the driven disc 16.

[0038] The spraying assembly includes a vertical pipe 6 fixedly connected to the bottom of the turntable, spray nozzles 7 connected to the vertical pipe 6 and evenly spaced along its height, and a movable pipe 8 that penetrates the turntable and connects to the upper end of the vertical pipe 6. A near-annular groove 5 with an arc angle of less than 360° is provided on the top plate 4. The movable pipe 8 passes through the near-annular groove 5 and slides therein. The upper end of the movable pipe 8 is connected to a metal bellows pipe 10 through a rotary pipe joint 9. The recovery tank 3 is connected to a recovery pipe that penetrates the housing 21. The recovery pipe is connected to a solenoid valve 13. The solenoid valve 13, the three-way joint 11, and the pump body 12 are connected in sequence. The pump body 12 is connected to the metal bellows pipe 10. The third end of the three-way joint 11 is used to connect external paint to enter. The solenoid valve 13 and the pump body 12 are coupled to the working circuit.

[0039] like Figure 3 As shown, the working circuit includes a power supply module 24, a main control module 25, a motor control module 26, a liquid level detection module 27, and an actuator module 28. The power supply module 24 supplies power to the main control module 25, the liquid level detection module 27, the actuator module 28, and the motor control module 26. The trigger signal input terminal of the main control module 25 is connected to the start button, and the output terminal of the main control module 25 is connected to the control terminal of the actuator module 28. The main control module 25 controls the overall power supply of the actuator module 28. The motor control module 26 receives the enable signal from the main control module 25, and the output terminal of the motor control module 26 is connected to the input terminal of the actuator module 28. The output terminal of the liquid level detection module 27 is connected to the input terminal of the actuator module 28. The actuator module 28 controls the power of the pump body 12, the on / off state of the solenoid valve 13, and the forward and reverse rotation of the drive motor 19.

[0040] The main control module 25 includes a first 555 timer, an adjustable resistor, a first capacitor, a second capacitor, and a main relay. The trigger pin of the first 555 timer is connected in series with the start button and then grounded. The threshold pin and discharge pin of the first 555 timer are connected in series with the adjustable resistor and the first capacitor and then grounded. The output pin of the first 555 timer is connected to one end of the main relay. The reset pin of the first 555 timer is connected to the power supply module 24. The control voltage pin of the first 555 timer is connected in series with the second capacitor and then grounded. The other end of the main relay is grounded, and one end of the normally open contact of the main relay is connected to the power supply module 24. The other end of the normally open contact of the main relay is connected to the power supply terminal of the actuator module 28.

[0041] The motor control module 26 includes a second 555 timer, a first resistor, a second resistor, a third capacitor, and an inverter; the trigger pin and threshold pin of the second 555 timer are connected to ground in series with the first resistor, the second resistor, and the third capacitor, and the output pin of the second 555 timer is connected to the input terminal of the inverter.

[0042] The liquid level detection module 27 includes a first comparator LM393, a second comparator LM393, an upper liquid level electrode, a lower liquid level electrode, a first voltage divider network, a second voltage divider network, a common liquid level electrode, and a third resistor, a fourth resistor, and a fifth resistor. The non-inverting input of the first comparator LM393 is connected to the voltage divider point of the first voltage divider network. The inverting input of the first comparator LM393 is connected in series with the third resistor and then connected to the upper liquid level electrode. The output of the first comparator LM393 is connected to the input of the actuator module 28. The non-inverting input of the second comparator LM393 is connected in series with the fourth resistor and then connected to the lower liquid level electrode. The inverting input of the second comparator LM393 is connected to the voltage divider point of the second voltage divider network. The output of LM393 is connected to the input of actuator module 28. The common electrode of liquid level is grounded after being connected in series with the fifth resistor. The upper limit electrode and the lower limit electrode of liquid level are set in the recovery tank 3. The first voltage divider network includes a first voltage divider resistor and a second voltage divider resistor connected in series. The voltage divider point between the first voltage divider resistor and the second voltage divider resistor is connected to the non-inverting input of the first comparator LM393. The other end of the first voltage divider resistor is energized, and the other end of the second voltage divider resistor is grounded. The second voltage divider network includes a third voltage divider resistor and a fourth voltage divider resistor connected in series. The voltage divider point between the third voltage divider resistor and the fourth voltage divider resistor is connected to the inverting input of the second comparator LM393. The other end of the third voltage divider resistor is energized, and the other end of the fourth voltage divider resistor is grounded.

[0043] The actuator module 28 includes a power relay, a valve relay, and a double-pole double-throw relay group. One end of the power relay is connected to the output of the second comparator LM393, and the other end is grounded. One normally open contact of the power relay is connected to the power supply module 24, and the other end is connected to the positive terminal of the motor in the pump body 12. One normally closed contact of the power relay is connected to the power supply module 24, and the other end is connected to the positive terminal of the motor in the pump body 12 after being connected in series with a current-limiting resistor. The negative terminal of the motor in the pump body 12 is grounded. One end of the valve relay is connected to the output of the first comparator LM393, and the other end is grounded. One pin of the normally open contact of the valve relay is connected to the voltage module, and the other pin is connected to the positive terminal of the solenoid valve 13. The negative terminal of solenoid valve 13 is grounded. One end of the first relay in the double-pole double-throw relay group is connected to the output pin of the second 555 timer, and the other end of the first relay in the double-pole double-throw relay group is grounded. One end of the contact pin of the first relay in the double-pole double-throw relay group is connected to the U terminal of the drive motor 19, and the other end of the contact pin of the first relay in the double-pole double-throw relay group is connected to the power module 24. One end of the second relay in the double-pole double-throw relay group is connected to the output terminal of the inverter, and the other end of the second relay in the double-pole double-throw relay group is grounded. One end of the contact pin of the second relay in the double-pole double-throw relay group is connected to the V terminal of the drive motor 19, and the other end of the contact pin of the second relay in the double-pole double-throw relay group is grounded. The common terminal of the drive motor 19 is grounded.

[0044] In actual operation, the operator hangs the sheet metal part to be painted on the hook 15. The connecting frame 18 keeps the positions of the connecting rod 14, hook 15, and sheet metal part unchanged. After the door slot 22 is closed by the sealing plate 23, the operator presses the start button, thereby activating the working circuit and causing the rotating component and spraying component to operate. The rotating component drives the spraying component to rotate in both directions. During this process, the spraying component draws in the paint entering from the three-way connector 11 and sprays it, allowing the paint to be sprayed. The coating is applied evenly to the sheet metal parts. Excess coating drips into the recovery tank 3. The liquid level detection module 27 then detects the amount of coating in the recovery tank 3. When the amount of coating exceeds the upper limit, the working circuit opens the solenoid valve 13 and increases the power of the pump body 12, so that the coating in the recovery tank 3 can also be sucked up and recycled for spraying. When the amount of coating in the recovery tank 3 is lower than the lower limit, the working circuit closes the solenoid valve 13 again and controls the pump body 12 to return to normal power for suction, thereby completing the recycling of the coating.

[0045] When the working circuit is in operation, after the user presses the start button, the first 555 timer in the main control module 25 is triggered, and its output pin outputs a high-level signal to drive the main relay to engage, connecting the actuator module 28 and the power supply module 24. At the same time, the first 555 timer starts counting. During the counting period, the second 555 timer of the motor control module 26 continuously outputs an alternating square wave signal, which drives the coil of the double-pole double-throw relay group alternately, controlling the drive motor 19 to run forward and reverse at the set frequency.

[0046] During operation, the liquid level detection module 27 monitors the liquid level of the recovery tank 3 in real time through the upper limit electrode and the lower limit electrode. When the liquid level rises to the upper limit electrode, the first comparator LM393 outputs a high level to make the valve relay energize and open the solenoid valve 13. At the same time, it switches the contact state of the power relay and restores the normally closed contact to make the water pump motor run at full speed.

[0047] When the liquid level drops below the lower limit electrode, the output of the second comparator LM393 flips, the valve relay releases and closes the solenoid valve 13, and the power relay causes the water pump motor to enter a low-speed operation mode in series with the current-limiting resistor to reduce the water intake.

[0048] The above-mentioned liquid level control process is carried out cyclically within the timing period until the 555 timer of the main control module 25 ends, its output pin turns low, the main relay disconnects the voltage module, and the water pump, motor and solenoid valve 13 stop working synchronously.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-surface spraying device for sheet metal parts, characterized in that, The system includes a frame (2), a recycling tank (3) fixedly connected to the bottom of the frame (2), a top plate (4) fixedly connected to the top surface of the frame (2), a housing (21) fixedly connected to the outside of the frame (2), a suspension assembly that extends through the top plate (4) into the frame (2), a rotating assembly that is rotatably set outside the suspension assembly, and a spraying assembly set at the bottom of the rotating assembly. The housing (21) is set outside the frame (2). The spraying assembly is connected to the recycling tank (3), and a three-way connector (11) and a pump body (12) are connected on the communication path between the spraying assembly and the recycling tank (3). The three-way connector (11) can guide external paint into the system. The rotating assembly and the spraying assembly are coupled with a working circuit. The working circuit controls the opening and closing of the connection between the recycling tank (3) and the spraying assembly, and controls the rotating assembly to rotate back and forth and controls the spraying assembly to work.

2. The multi-surface spraying device for sheet metal parts according to claim 1, characterized in that, The top of the casing (21) is fixedly connected to a connecting frame (18), and the upper end of the suspension assembly is fixedly connected to the connecting frame (18). The suspension assembly includes a connecting rod (14) and a hook (15) fixedly connected to the lower end of the connecting rod (14). The connecting rod (14) passes through the top plate (4) into the frame (2).

3. The multi-surface spraying device for sheet metal parts according to claim 2, characterized in that, The rotating assembly includes a connecting sleeve (17) sleeved on the outside of the connecting rod (14) and extending through the top plate (4), a turntable fixedly connected to the lower end of the connecting sleeve (17) and sleeved on the outside of the connecting rod (14), a passive disk (16) fixedly connected to the upper end of the connecting sleeve (17) and located on the outside of the connecting rod (14), and a drive motor (19) fixedly connected to the connecting frame (18) and arranged vertically. The rotor shaft of the drive motor (19) is fixedly connected to an active disk (20) that is connected to the passive disk (16) for transmission.

4. The multi-surface spraying device for sheet metal parts according to claim 3, characterized in that, The spraying assembly includes a vertical pipe (6) fixedly connected to the bottom of the turntable, a spray nozzle (7) connected to the vertical pipe (6) and evenly spaced along its height, and a movable pipe (8) that passes through the turntable and connects to the upper end of the vertical pipe (6). The top plate (4) has a near-annular groove (5) with an arc angle of less than 360°. The movable pipe (8) passes through the near-annular groove (5) and slides therein. The upper end of the movable pipe (8) is connected to a metal corrugated pipe (10) through a rotating pipe joint (9). The recovery tank (3) is connected to a recovery pipe that passes through the casing (21). The recovery pipe is connected to a solenoid valve (13). The solenoid valve (13), the three-way joint (11), and the pump body (12) are connected in sequence. The pump body (12) is connected to the metal corrugated pipe (10). The third end of the three-way joint (11) is used to connect external paint to enter. The solenoid valve (13) and the pump body (12) are coupled to the working circuit.

5. The multi-surface painting device for sheet metal parts according to claim 1, characterized in that, The bottom of the frame (2) is fixedly connected to several bases (1), and a door groove (22) is opened on one side of the casing (21). A sealing plate (23) is detachably connected inside the door groove (22).

6. The multi-surface painting device for sheet metal parts according to claim 4, characterized in that, The working circuit includes a power supply module (24), a main control module (25), a motor control module (26), a liquid level detection module (27), and an actuator module (28). The power module (24) supplies power to the main control module (25), the liquid level detection module (27), the actuator module (28), and the motor control module (26). The trigger signal input terminal of the main control module (25) is connected to the start button, and the output terminal of the main control module (25) is connected to the control terminal of the actuator module (28). The main control module (25) controls the power supply of the actuator module (28). The motor control module (26) receives the enable signal from the main control module (25), and the output terminal of the motor control module (26) is connected to the input terminal of the actuator module (28). The output terminal of the liquid level detection module (27) is connected to the input terminal of the actuator module (28). The actuator module (28) controls the power of the pump body (12), the on / off state of the solenoid valve (13), and the forward and reverse rotation of the drive motor (19).

7. The multi-surface painting device for sheet metal parts according to claim 6, characterized in that, The main control module (25) includes a first 555 timer, an adjustable resistor, a first capacitor, a second capacitor, and a main relay; The trigger pin of the first 555 timer is connected in series with the start button and then grounded. The threshold pin and discharge pin of the first 555 timer are connected to an adjustable resistor and a first capacitor and then grounded. The output pin of the first 555 timer is connected to one end of the main relay. The reset pin of the first 555 timer is connected to the power supply module (24). The control voltage pin of the first 555 timer is connected in series with a second capacitor and then grounded. The other end of the main relay is grounded. One end of the normally open contact of the main relay is connected to the power supply module (24). The other end of the normally open contact of the main relay is connected to the power supply end of the actuator module (28).

8. The multi-surface sheet metal part painting apparatus of claim 7, wherein, The motor control module (26) includes a second 555 timer, a first resistor, a second resistor, a third capacitor, and an inverter; The trigger pin and threshold pin of the second 555 timer are connected to ground via a first resistor, a second resistor, and a third capacitor in series. The output pin of the second 555 timer is connected to the input of an inverter.

9. The multi-surface painting device of claim 8, wherein, The liquid level detection module (27) includes a first comparator LM393, a second comparator LM393, a liquid level upper limit electrode, a liquid level lower limit electrode, a first voltage divider network, a second voltage divider network, a liquid level common electrode, and a third resistor, a fourth resistor, and a fifth resistor. The non-inverting input of the first comparator LM393 is connected to the voltage divider point of the first voltage divider network. The inverting input of the first comparator LM393 is connected to the upper limit electrode of the liquid level after being connected in series with a third resistor. The output of the first comparator LM393 is connected to the input of the actuator module (28). The non-inverting input of the second comparator LM393 is connected to the lower limit electrode of the liquid level after being connected in series with a fourth resistor. The inverting input of the second comparator LM393 is connected to the voltage divider point of the second voltage divider network. The output of the second comparator LM393 is connected to the input of the actuator module (28). The common electrode of the liquid level is grounded after being connected in series with a fifth resistor. The upper limit electrode and the lower limit electrode of the liquid level are set in the recovery tank (3). The first voltage divider network includes a first voltage divider resistor and a second voltage divider resistor connected in series. The voltage divider point between the first voltage divider resistor and the second voltage divider resistor is connected to the non-inverting input terminal of the first comparator LM393. The other end of the first voltage divider resistor is energized, and the other end of the second voltage divider resistor is grounded. The second voltage divider network includes a third voltage divider resistor and a fourth voltage divider resistor connected in series. The voltage divider point between the third voltage divider resistor and the fourth voltage divider resistor is connected to the inverting input terminal of the second comparator LM393. The other end of the third voltage divider resistor is energized, and the other end of the fourth voltage divider resistor is grounded.

10. The multi-surface sheet metal part painting apparatus of claim 9, wherein, The actuator module (28) includes a power relay, a valve relay, and a double-pole double-throw relay group; One end of the power relay is connected to the output of the second comparator LM393, and the other end of the power relay is grounded. One end of the normally open contact of the power relay is connected to the power module (24), and the other end of the normally open contact of the power relay is connected to the positive terminal of the motor in the pump body (12). One end of the normally closed contact of the power relay is connected to the power module (24), and the other end of the normally closed contact of the power relay is connected to the positive terminal of the motor in the pump body (12) after being connected in series with a current-limiting resistor. The negative terminal of the motor in the pump body (12) is grounded. One end of the valve relay is connected to the output of the first comparator LM393, and the other end of the valve relay is grounded. One end of the normally open contact pin of the valve relay is connected to the voltage module, and the other end of the normally open contact pin of the valve relay is connected to the positive terminal of the solenoid valve (13). The negative terminal of the solenoid valve (13) is... Grounded, one end of the first relay in the double-pole double-throw relay group is connected to the output pin of the second 555 timer, the other end of the first relay in the double-pole double-throw relay group is grounded, one end of the contact pin of the first relay in the double-pole double-throw relay group is connected to the U terminal of the drive motor (19), the other end of the contact pin of the first relay in the double-pole double-throw relay group is connected to the power supply module (24), one end of the second relay in the double-pole double-throw relay group is connected to the output terminal of the inverter, the other end of the second relay in the double-pole double-throw relay group is grounded, one end of the contact pin of the second relay in the double-pole double-throw relay group is connected to the V terminal of the drive motor (19), the other end of the contact pin of the second relay in the double-pole double-throw relay group is grounded, and the common terminal of the drive motor (19) is grounded.

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