Electrostatic powder coating machine with automatic cleaning function

Abstract

The utility model belongs to the technical field of cable production, and particularly relates to an electrostatic powder coating machine with an automatic cleaning function. The device comprises an electrostatic powder spraying chamber, a stirring chamber, a dust removing assembly, a leakage preventing mechanism and a powder returning mechanism. The electrostatic powder spraying chamber comprises a powder spraying cavity, a first backflow cavity and a second backflow cavity. According to the electrostatic powder coating machine with the automatic cleaning function, powder can be prevented from overflowing through a negative pressure material suction mechanism formed by the first backflow cavity, the second backflow cavity and the anti-leakage mechanism, and powder recycling and feedback can be achieved through the back flushing cleaning function of the powder returning mechanism; and meanwhile, the electrostatic powder attached to the inner wall of the powder spraying chamber can be cleaned and recycled through the air knife dust removal assembly.

Description

Technical Field

[0001] This application belongs to the field of cable manufacturing technology, specifically relating to an electrostatic powder coating machine with automatic cleaning function. Background Technology

[0002] Electrostatic powder coating machines are specialized equipment used in cable manufacturing to create a talc powder layer on the surface of cables. Adding this layer primarily prevents the wires from sticking together and controls peeling force. However, because some of the powder carries static electricity, it easily adheres to the inner wall of the powder coating chamber. This leads to material waste and can also form clumps that eventually fall onto the cable surface, affecting the powder coating effect. Furthermore, existing electrostatic powder coating workshops often see powder accumulation, mainly due to insufficient leak-proof capabilities of the electrostatic powder coating machine, causing powder spillage. Utility Model Content

[0003] In view of this, this application provides an electrostatic powder passing machine with automatic cleaning function to solve all or part of the technical problems described in the background section of this application.

[0004] The innovative concepts of this application are: 1. By adding a dust removal component to the electrostatic powder spraying chamber, the powder adhering to the inner wall of the equipment is cleaned and recycled; 2. By adding a negative pressure reflux chamber at the inlet and outlet holes on both sides of the electrostatic powder spraying chamber, the powder is prevented from overflowing; 3. By integrating a powder return mechanism into the equipment, the powder from the reflux chamber is filtered, recycled, and fed back to the mixing chamber.

[0005] The solution provided in this application to solve its technical problem is as follows:

[0006] An electrostatic powder coating machine with automatic cleaning function includes an electrostatic powder coating chamber and a dust removal component; the dust removal component includes a dust removal fan, a dust removal air knife, and a dust removal air duct; the dust removal air knife is installed in the electrostatic powder coating chamber and connected to the dust removal fan through the dust removal air duct.

[0007] Because the powder in the electrostatic powder coating chamber carries static electricity, it easily adheres to the inner wall of the chamber. This not only wastes material but also causes it to occasionally fall from the inner wall, affecting the powder coating effect. By installing a dust removal system in the powder coating chamber, the material adhering to the wire guide holes on the inner wall can be cleaned, recycled, and reused, preventing dust from contaminating the finished product and ensuring the best powder coating effect for the wire.

[0008] Preferably, the dust removal air knife is installed on the upper inner wall of the electrostatic powder coating chamber, with the air knife nozzles aligned above the wire passage holes on both sides. Positioning the air knife outlets on the upper inner wall of the electrostatic powder coating chamber and aligning them above the wire passage holes on both sides effectively cleans the inner wall surface above the wire passage holes.

[0009] Preferably, the electrostatic powder spraying chamber includes a powder spraying chamber, a first reflux chamber, and a second reflux chamber; the powder spraying chamber and the first reflux chamber are provided with first wire passing holes, and the powder spraying chamber and the second reflux chamber are provided with second wire passing holes.

[0010] The wire to be coated with powder can enter the powder coating chamber through the first wire guide hole and exit through the second wire guide hole, or it can run in the opposite direction, entering the powder coating chamber through the second wire guide hole and exiting through the first wire guide hole. Since the electrostatic powder coating chamber is a sealed structure, the only areas prone to powder leakage are the wire guide holes on both sides. Therefore, a return flow chamber is installed at the wire guide holes on both sides, and a negative pressure suction mechanism is created to prevent powder leakage from the wire guide holes to the greatest extent possible.

[0011] As a preferred embodiment, the electrostatic powder separator with automatic cleaning function also includes a leak-proof mechanism; the leak-proof mechanism includes a negative pressure chamber, a filter chamber, a negative pressure fan, and an environmentally friendly filter element; the exhaust port of the negative pressure fan is connected to the negative pressure chamber, the filter chamber is connected to the first return chamber and the second return chamber, and the environmentally friendly filter element is installed in the filter chamber and its exhaust port is connected to the negative pressure chamber.

[0012] When the negative pressure fan is started, it creates a negative pressure state in the negative pressure chamber. The overflowing powder entering the first and second return chambers will be sucked into the environmental protection filter element by the negative pressure. After being filtered by the environmental protection filter element, it will be deposited on the outer surface of the environmental protection filter element. Thus, the negative pressure suction can prevent the powder from overflowing.

[0013] As a preferred embodiment, the electrostatic filter with automatic cleaning function also includes a powder return mechanism and a mixing chamber; the powder return mechanism includes a compressed air tank, a backflush pipe, a backflush solenoid valve, and a powder return funnel; the two ends of the backflush pipe are respectively connected to the compressed air tank and the inner cavity of the environmental protection filter element, and the backflush solenoid valve is used to control the opening or closing of the backflush pipe; the powder return funnel is located at the bottom of the filter chamber and the powder outlet is connected to the mixing chamber.

[0014] After the backflush solenoid valve is turned on, compressed gas enters the inner cavity of the filter element through the backflush pipe. The backflush action blows off the powder deposited on the surface of the filter element and feeds it back to the mixing chamber through the powder return funnel.

[0015] Preferably, the powder return mechanism also includes a push plate, a push plate cylinder, and a push plate solenoid valve; the push plate cylinder is located in the negative pressure chamber directly opposite the air outlet of the environmental protection filter element, and the push plate is located on the piston rod of the push plate cylinder; the air inlet of the push plate cylinder is connected to the compressed air tank through the push plate solenoid valve.

[0016] When cleaning the backflush pipe, the push plate is first driven by the push plate cylinder to seal the air outlet of the environmental protection filter element to improve the backflush efficiency. After the backflush cleaning is completed, the push plate is returned to its original position for normal operation.

[0017] Preferably, the mixing chamber uses a mixing mechanism to mix the powder; the mixing mechanism includes a mixing motor, a mixing shaft, and several mixing blades fixed on the mixing shaft; the mixing shaft is horizontally arranged inside the mixing chamber, and the mixing motor is driven to the mixing shaft.

[0018] The stirring motor can drive the stirring shaft and stirring paddle to rotate to stir the powder entering the stirring chamber, so that the powder flies up and mixes with the air, making it easier for the powder supply mechanism to absorb the powder in the stirring chamber. Unlike the vertical shaft stirring mechanism of the existing electrostatic powder passing machine, this application adopts a horizontal shaft stirring mechanism (that is, the stirring shaft is set horizontally), which not only improves the stirring efficiency, but also reduces the size of the equipment by lowering the height of the stirring chamber.

[0019] Preferably, the electrostatic powder spraying chamber sprays powder onto the wire passing through the electrostatic powder spraying chamber via a powder spraying mechanism; the powder spraying mechanism includes a powder spraying gun, a discharge needle, an electrostatic high-voltage module, and an electrostatic controller; the powder spraying gun is located inside the electrostatic powder spraying chamber, the discharge needle is located in the middle of the powder spraying gun nozzle, and the electrostatic high-voltage module is electrically connected to the discharge needle.

[0020] Preferably, the mixing chamber conveys powder to the electrostatic powder spraying chamber through a powder supply mechanism; the powder supply mechanism includes a powder supply fan, a powder inlet pipe, and a powder delivery pipe; the two ends of the powder inlet pipe are respectively connected to the air inlet of the powder supply fan and the mixing chamber, and the two ends of the powder delivery pipe are respectively connected to the air outlet of the powder supply fan and the electrostatic powder spraying chamber.

[0021] Preferably, the electrostatic powder spraying chamber is also equipped with a powder-vibrating device, which is installed on the side wall of the electrostatic powder spraying chamber and is used to shake off the powder adhering to the side wall of the electrostatic powder spraying chamber through vibration. More preferably, the powder-vibrating device is a pneumatic vibrator.

[0022] As a preferred option, the electrostatic powder coating machine with automatic cleaning function completes the system control function through an electronic control system.

[0023] Beneficial technical effects:

[0024] The electrostatic powder coating machine with automatic cleaning function disclosed in this application can not only prevent powder overflow through the negative pressure suction mechanism formed by the first and second return chambers and the anti-leakage mechanism, but also realize the recovery and feedback of powder through the back-blowing cleaning function of the powder return mechanism; at the same time, it can also clean the electrostatic powder adhering to the surface above the wire hole in the powder coating chamber through the air knife dust removal component; thereby preventing powder from falling onto the wire surface, ensuring the powder coating effect of the wire, and improving the environment of the powder coating workshop.

[0025] The technical solution and technical effects of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1Front view of an electrostatic powder coating machine with automatic cleaning function;

[0027] Figure 2 Top view of an electrostatic powder coating machine with automatic cleaning function;

[0028] Icon description:

[0029] 1-Electrostatic powder spraying chamber, 11-Powder spraying cavity, 12-First return cavity, 13-Second return cavity, 14-First wire passage hole, 15-Second wire passage hole;

[0030] 2-Dust removal component, 21-Dust removal fan, 22-Dust removal air knife, 23-Dust removal duct, 24-Air knife nozzle;

[0031] 3-Leakage prevention mechanism, 31-Negative pressure chamber, 32-Filter chamber, 33-Negative pressure fan, 34-Environmental protection filter element;

[0032] 4-Powder return mechanism, 41-Compressed air tank, 42-Backflush pipe, 43-Backflush solenoid valve, 44-Powder return funnel, 45-Push plate, 46-Push plate cylinder;

[0033] 5 - Mixing chamber;

[0034] 6-Stirring mechanism, 61-Stirring motor, 62-Stirring shaft, 63-Stirring paddle;

[0035] 7-Powder spraying mechanism, 71-Powder spraying gun, 72-Discharge needle, 73-Electrostatic high voltage module;

[0036] 8-Powder supply mechanism, 81-Powder supply fan, 82-Powder inlet pipe, 83-Powder delivery pipe;

[0037] 9. Electrical control system. Detailed Implementation

[0038] Please see Figures 1-2 The electrostatic powder coating machine with automatic cleaning function disclosed in this application includes an electrostatic powder spraying chamber 1 and a mixing chamber 5. The electrostatic powder spraying chamber 1 is used to process the talc powder layer on the passing wire by electrostatic powder spraying, and the mixing chamber 5 is used to perform pre-treatment of the powder by mixing so that the powder feeding mechanism can pick up the powder.

[0039] The electrostatic powder spraying chamber 1 performs wire powder spraying processing through the powder spraying mechanism 7. The powder spraying mechanism 7 includes a powder spraying gun 71, a discharge needle 72, and an electrostatic high voltage module 73. The powder spraying gun 71 is installed inside the electrostatic powder spraying chamber 1, the discharge needle 72 is installed in the middle part of the nozzle of the powder spraying gun 71, and the electrostatic high voltage module 73 is electrically connected to the discharge needle 72.

[0040] The electrostatic powder spraying chamber 1 includes a powder spraying chamber 11, a first return chamber 12, and a second return chamber 13; the powder spraying chamber 11 and the first return chamber 12 are provided with first wire passing holes 14, and the powder spraying chamber 11 and the second return chamber 13 are provided with second wire passing holes 15.

[0041] Since the powder spraying chamber 11 is a sealed structure, the only places where powder leakage is likely to occur are the through holes on both sides. Therefore, by setting up a return chamber at the through holes on both sides and forming a negative pressure suction through the anti-leakage mechanism 3, the leakage of powder from the through holes can be prevented to the greatest extent, thereby avoiding powder overflow.

[0042] The leak prevention mechanism 3 includes a negative pressure chamber 31, a filter chamber 32, a negative pressure fan 33, and an environmental protection filter element 34. The exhaust port of the negative pressure fan 33 is connected to the negative pressure chamber 31, the filter chamber 32 is connected to the first return chamber 12 and the second return chamber 13, and the environmental protection filter element 34 is installed in the filter chamber 32 and its exhaust port is connected to the negative pressure chamber 31.

[0043] After the negative pressure fan 33 is started, it will process the negative pressure chamber 31 into a negative pressure state. The overflowing powder entering the first and second return chambers will be sucked into the environmental protection filter element 34 by the negative pressure. After being filtered by the environmental protection filter element 34, it will be deposited on the outer surface of the filter element, thereby preventing the powder from overflowing through the negative pressure suction effect.

[0044] The powder return mechanism 4 includes a compressed air tank 41, a backflush pipe 42, a backflush solenoid valve 43, a powder return funnel 44, a push plate 45, a push plate cylinder 46, and a push plate solenoid valve 47.

[0045] The two ends of the backflush pipe 42 are connected to the compressed air tank 41 and the inner cavity of the environmental protection filter element 34, respectively. The backflush solenoid valve 43 is used to control the on or off state of the backflush pipe 42. The powder return funnel 44 is set at the bottom of the filter chamber 32 and the powder outlet is connected to the stirring chamber 5.

[0046] The push plate cylinder 46 is located in the negative pressure chamber 31, directly opposite the air outlet of the environmental protection filter element 34. The push plate 45 is mounted on the piston rod of the push plate cylinder 46. The air inlet of the push plate cylinder 46 is connected to the compressed air tank 41 through the push plate solenoid valve 47.

[0047] The push plate 45 can open or close the air outlet of the environmental protection filter element 34 under the action of the push plate cylinder 46. When the backflush pipe 42 needs backflush cleaning, the push plate 45 is first driven by the push plate cylinder 46 to close the air outlet of the environmental protection filter element 34 to improve the backflush cleaning efficiency. After the backflush cleaning is completed, the push plate 45 returns to its original position for normal operation.

[0048] After the backflush solenoid valve 43 is turned on, compressed gas enters the inner cavity of the filter element through the backflush pipe 42. The backflush action blows the powder deposited on the outer surface of the filter element into the filter chamber 32 and feeds it back to the stirring chamber 5 through the powder return funnel 44.

[0049] The mixing chamber 5 mixes the powder through the mixing mechanism 6; the mixing mechanism 6 includes a mixing motor 61, a mixing shaft 62, and several mixing paddles 63 fixed on the mixing shaft 62; the mixing shaft 62 is horizontally arranged in the mixing chamber 5, and the mixing motor 61 is driven to the mixing shaft 62. The mixing motor 61 can drive the mixing shaft 62 through components or assemblies such as synchronous pulleys and transmission belts.

[0050] The stirring motor 61 can drive the stirring shaft 62 and the stirring paddle 63 to rotate, so as to stir the powder entering the stirring chamber 5 and generate mixed air. Unlike the vertical shaft stirring mechanism of the existing electrostatic powder passing machine, this application adopts a horizontal shaft stirring mechanism (that is, the stirring shaft is set horizontally), which not only improves the stirring efficiency, but also reduces the equipment volume by lowering the height of the stirring chamber.

[0051] The mixing chamber 5 conveys powder to the electrostatic powder spraying chamber 1 through the powder supply mechanism 8; the powder supply mechanism 8 includes a powder supply fan 81, a powder inlet pipe 82, and a powder delivery pipe 83. The two ends of the powder inlet pipe 82 are respectively connected to the air inlet of the powder supply fan 81 and the mixing chamber 5, and the two ends of the powder delivery pipe 83 are respectively connected to the air outlet of the powder supply fan 81 and the electrostatic powder spraying chamber 1.

[0052] The dust removal assembly 2 includes a dust removal fan 21, a dust removal air knife 22, and a dust removal duct 23. The dust removal air knife 22 is installed inside the electrostatic powder spraying chamber 1 and is connected to the dust removal fan 21 through the dust removal duct 23. Specifically, the dust removal air knife 22 is installed on the upper inner wall of the electrostatic powder spraying chamber 1 and the air knife nozzle 24 is aligned with the top of the wire passage holes on both sides.

[0053] Because the powder in the electrostatic powder spraying chamber 1 carries static electricity, it easily adheres to the inner wall of the chamber. This not only wastes material but also causes it to occasionally fall from the inner wall, affecting the powder spraying effect. By installing a dust removal component 2 in the powder spraying chamber, the material adhering to the wires on the inner wall can be cleaned, recycled, and reused, preventing dust from contaminating the finished product and ensuring the powder spraying effect on the wires.

[0054] At the same time, by setting the air knife outlet 24 on the side above the wire hole and aligning it with the wire, it can also achieve the effect of cleaning the inner wall surface above the first and second wire holes.

[0055] The electrical control system 9 is used to complete the system control function. It is a control system composed of a micro industrial control computer consisting of a series of electrical components such as PLC module, touch screen, frequency converter, and contactor. It electrically controls the control ports of dust removal fan 21, negative pressure fan 33, back-blowing solenoid valve 43, push plate cylinder 46, stirring motor 61, electrostatic high voltage module 73, powder supply fan 81, and push plate solenoid valve, thereby completing the complex working process of this equipment.

[0056] Explanation of principles and effects:

[0057] 1. Cleaning function: The dust removal component 2 can clean and recover the powder adhering above the wire in the electrostatic powder spraying chamber 1 through the dust removal air knife 22, so as to ensure the powder spraying effect of the wire and improve the material utilization rate.

[0058] 2. Leakage prevention function: The leakage prevention mechanism 3 and the first and second return chambers form a negative pressure suction mechanism to prevent powder from overflowing. It can also realize the recovery and feedback of powder through the back-blowing cleaning function of the powder return mechanism 4.

[0059] Therefore, the electrostatic powder coating machine with automatic cleaning function disclosed in this application can not only improve material utilization efficiency and ensure the powder coating effect of wires, but also help improve the environment of the powder coating workshop.

[0060] The technical solutions and effects of this application have been described in detail above with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can develop other embodiments based on this. Any simple modifications and equivalent substitutions that do not depart from the innovative concept of this application are covered by this application and fall within the protection scope of this patent.

Claims

1. An electrostatic powder coating machine with automatic cleaning function, comprising an electrostatic powder spraying chamber (1), characterized in that: it further comprises a dust removal assembly (2); the dust removal assembly (2) comprises a dust removal fan (21), a dust removal air knife (22) and a dust removal air pipe (23); the dust removal air knife (22) is arranged in the electrostatic powder spraying chamber (1) and is communicated to the dust removal fan (21) through the dust removal air pipe (23).

2. The electrostatic powder coating machine with automatic cleaning function according to claim 1, characterized in that: the electrostatic powder spraying chamber (1) comprises a powder spraying cavity (11), a first backflow cavity (12) and a second backflow cavity (13); the powder spraying cavity (11) and the first backflow cavity (12) are provided with a first wire passing hole (14), and the powder spraying cavity (11) and the second backflow cavity (13) are provided with a second wire passing hole (15).

3. The electrostatic powder coating machine with automatic cleaning function according to claim 2, characterized in that: the electrostatic powder coating machine with automatic cleaning function further comprises a leakage prevention mechanism (3); the leakage prevention mechanism (3) comprises a negative pressure chamber (31), a filter chamber (32), a negative pressure fan (33) and an environmental protection filter element (34); the air suction port of the negative pressure fan (33) is communicated to the negative pressure chamber (31), the filter chamber (32) is communicated to the first backflow cavity (12) and the second backflow cavity (13), and the environmental protection filter element (34) is arranged in the filter chamber (32) and the air outlet is communicated to the negative pressure chamber (31).

4. The electrostatic powder coating machine with automatic cleaning function according to claim 3, characterized in that: the electrostatic powder coating machine with automatic cleaning function further comprises a powder returning mechanism (4) and a stirring chamber (5); the powder returning mechanism (4) comprises a compressed gas tank (41), a back blowing pipe (42), a back blowing electromagnetic valve (43) and a powder returning funnel (44); the two ends of the back blowing pipe (42) are respectively communicated to the compressed gas tank (41) and the inner cavity of the environmental protection filter element (34), and the back blowing electromagnetic valve (43) is used for controlling the conduction or disconnection of the back blowing pipe (42); the powder returning funnel (44) is arranged at the bottom of the filter chamber (32) and the powder outlet is communicated to the stirring chamber (5).

5. The electrostatic powder coating machine with automatic cleaning function according to claim 4, characterized in that: the powder returning mechanism (4) further comprises a push plate (45), a push plate air cylinder (46) and a push plate electromagnetic valve; the push plate air cylinder (46) is arranged in the negative pressure chamber (31) and opposite to the air outlet of the environmental protection filter element (34), and the push plate (45) is arranged on the piston rod of the push plate air cylinder (46); the air inlet of the push plate air cylinder (46) is communicated to the compressed gas tank (41) through the push plate electromagnetic valve.

6. The electrostatic powder coating machine with automatic cleaning function according to claim 4, characterized in that: the stirring chamber (5) is used for stirring the powder through a stirring mechanism (6). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The stirring mechanism (6) comprises a stirring motor (61), a stirring shaft (62) and a plurality of stirring paddles (63) fixed on the stirring shaft (62); The stirring shaft (62) is horizontally arranged in the stirring chamber (5), and the stirring motor (61) is drivingly connected to the stirring shaft (62).

7. The electrostatic powder coating machine with automatic cleaning function according to claim 4, characterized in that: The electrostatic powder spraying chamber (1) is provided with a powder spraying mechanism (7) for powdering the wire passing through the electrostatic powder spraying chamber (1); The powder spraying mechanism (7) comprises a powder spraying gun (71), a discharge needle (72) and an electrostatic high-voltage module (73). The stirring chamber (5) is provided with a powder supply mechanism (8) for delivering powder to the electrostatic powder spraying chamber (1); The powder supply mechanism (8) comprises a powder supply fan (81), a powder inlet pipe (82) and a powder delivery pipe (83).

8. The electrostatic powder coating machine with automatic cleaning function according to claim 1, characterized in that: The dust removal air knife (22) is arranged on the upper inner wall of the electrostatic powder spraying chamber (1) and the air knife blowing port (24) is aligned above the wire passing holes on both sides.

9. The electrostatic powder coating machine with automatic cleaning function according to claim 1, characterized in that: The electrostatic powder spraying chamber (1) is further provided with a powder vibrating device arranged on the side wall of the electrostatic powder spraying chamber (1) for vibrating the powder attached to the side wall of the electrostatic powder spraying chamber (1) to fall off.

10. The electrostatic powder coating machine with automatic cleaning function according to claim 1, characterized in that: The electrostatic powder coating machine with automatic cleaning function further comprises an electric control system (9) for completing the system control function.

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