Electrostatic spray device for electroconductive paint

Abstract

The application relates to the technical field of electrostatic spraying, in particular to an electrostatic spraying device for conductive paint; the device comprises a gun body, a gun barrel, a first column, a second column, a fan blade, a scraper, a second groove, a second rod and an electric telescopic rod; the scraper moves to the end far from the gun body along with the second column, the second rod moves to the end far from the gun body along with the scraper, the second rod rotates in the second groove along with the movement of the second rod, the second rod is pressed against the inner wall of the gun body under the action of a torsional spring, the second rod is tightly attached to the inner wall of the gun body, the fan blade rotates along with the flow of gas in the second groove, the fan blade drives the scraper to rotate, the scraper drives the second rod to rotate, and the second rod cleans the conical wall of the gun barrel when rotating, so that the probability of scale accumulation on the wall is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrostatic spraying, in particular to an electrostatic spraying device for conductive paint. BACKGROUND

[0002] Electrostatic spraying is a spraying method that uses high-voltage electrostatic field to make negatively charged paint particles move in the opposite direction of the electric field, and the paint particles are adsorbed on the surface of the workpiece. A thick coating can be obtained by one coating. The spraying equipment is composed of a spray gun, a spray cup and an electrostatic spraying high-voltage power supply, etc. The inside of the spray gun is prone to accumulate when in use.

[0003] A patent about an electrostatic spraying device for conductive paint has appeared in the prior art. A Chinese patent with application number CN032335180 discloses an electrostatic spraying gun, which aims to solve the defects of the existing electrostatic spraying gun, such as easy powder accumulation in the needle seat, easy damage of the high-voltage pack, and inconvenient maintenance of the whole piece. The gun includes a handle, a barrel, a powder conveying channel, a high-voltage pack for generating static electricity, a high-voltage needle connected with the high-voltage pack and used for ionizing powder, and a three-time gas channel for conveying three-time blowing gas to the high-voltage needle. The three-time gas channel has a needle valve for adjusting the size of the three-time gas.

[0004] The above-mentioned prior art sets the powder conveying channel, the high-voltage pack, the high-voltage needle and the three-time gas channel, so that the high-voltage electrode in the spray gun sleeve remains clean and free of powder accumulation, effectively solving the problem of easy powder accumulation and dampening of the existing electrostatic spraying gun, which causes the high-voltage pack to weaken or be damaged, and further improving the service life of the spray gun. However, the paint liquid in the existing technology is not fully shaken and uniform before spraying, and the excessive paint deposited at the bottom of the tank causes the nozzle to be blocked during spraying. The paint liquid is shaken too hard before spraying, which causes the stirrer to break and block the nozzle. After one spraying, the nozzle is not inverted for cleaning, which causes the residual paint to dry and block the nozzle. During storage, the paint is inverted or tilted, which causes the paint in the paint to deposit and block the discharge hole of the valve. The content of the product beyond the shelf life becomes coarse and blocks the discharge hole of the valve, which increases the labor intensity of workers during processing.

[0005] In view of this, the present application provides an electrostatic spraying device for conductive paint, which solves the above problems. SUMMARY

[0006] In order to make up for the deficiencies of the prior art, solve the problems of the prior art, such as the nozzle being blocked by the excessive paint deposited at the bottom of the tank during spraying, the stirring rod being broken and the nozzle being blocked by excessive force when shaking the paint before spraying, the nozzle being blocked by the dried paint after the residual paint is not cleaned after one-time spraying, and the valve outlet being blocked by the paint sediment during storage, the present application provides an electrostatic spraying device for conductive paint.

[0007] The technical scheme adopted by the present application to solve the technical problems is: an electrostatic spraying device for conductive paint, comprising a spray gun, a spray cup and an electrostatic spraying high-voltage power supply; characterized in that: the spray gun comprises a gun body and a gun barrel, a first column is arranged inside the gun barrel, one end of the first column is fixedly connected to the gun body, and the first column is located at the center position inside the gun barrel;

[0008] The opening of the gun barrel away from the gun body is conical, and the aperture of the end of the gun barrel away from the gun body is smaller than the aperture of the middle part of the gun barrel;

[0009] One end of the first column away from the gun body is rotatably connected to a second column, and the outer circle of the second column is uniformly fixedly connected to a plurality of fan blades;

[0010] One end of the fan blade away from the second column is uniformly fixedly connected to a scraper, and the scraper is in contact with the inner wall of the gun body;

[0011] The scraper is provided with a crushing unit.

[0012] Preferably, the crushing unit comprises a sawtooth groove, one side of the scraper is provided with a chamfer, the scraper is arc-shaped, and the sawtooth groove is provided on one side of the chamfer of the scraper.

[0013] Preferably, the crushing unit comprises a blade, the blade is fixedly connected to one side of the scraper, and the scraper is arc-shaped.

[0014] Preferably, the crushing unit comprises a first groove and a spiral blade, the first groove is provided on one side of the scraper, and the spiral blade is rotatably connected to the first groove through a rotating shaft.

[0015] Preferably, the cross section of the first groove is fan-shaped, and the spiral blade is located inside the fan-shaped groove.

[0016] Preferably, one end of the first column away from the gun body is fixedly connected to an electric telescopic rod, and the second column is rotatably connected to the electric telescopic rod.

[0017] Preferably, one end of the scraper close to the outlet of the gun barrel is provided with a second groove, a second rod is rotatably connected to the second groove through a rotating shaft, and a torsional spring is sleeved on the rotating shaft.

[0018] Preferably, an annular groove is arranged at the bending position of the tapered opening at the end of the barrel away from the gun body, and an annular block is rotatably connected in the annular groove.

[0019] Preferably, the end of the scraper away from the gun body is arc-shaped, and the end of the second rod away from the scraper is arc-shaped.

[0020] Preferably, the end of the second rod away from the scraper is provided with a rolling ball in rolling mode, and the rolling ball is in contact with the inner wall of the barrel.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. The electrostatic spraying device for conductive paint provided by the present application comprises a gun body, a barrel, a first column, a second column, a fan blade and a scraper. When the fan blade rotates, the fan blade plays a role of dispersing high-pressure spray. When the fan blade moves, the scraper arranged at the end of the fan blade away from the second column rotates with the fan blade. When the scraper rotates, the scraper scrapes the inner wall of the barrel, so that the scale formed by the inner wall of the barrel is scraped, and the scale is broken by the breaking unit arranged on the scraper after being scraped, so that the large particles are prevented from blocking the barrel.

[0023] 2. The electrostatic spraying device for conductive paint provided by the present application comprises a second groove, an electric telescopic rod, an annular groove, an annular block, a rolling ball and a second rod. The scraper moves to the end away from the gun body with the second column, the second rod moves to the end away from the gun body with the scraper, the second rod rotates in the second groove at the connection position with the scraper when the second rod moves, and the second rod is pressed against the inner wall of the gun body under the action of the torsional spring, so that the second rod is tightly attached to the inner wall of the gun body. When the gas flows in the second groove, the fan blade rotates, the fan blade drives the scraper to rotate, the scraper drives the second rod to rotate, and the second rod cleans the tapered wall of the barrel when the second rod rotates, so that the probability of scale accumulation on the wall is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below with reference to the drawings.

[0025] Figure 1 is a perspective view of the present application;

[0026] Figure 2 is Figure 1 a structure view of the barrel and example one;

[0027] Figure 3 is a structure view of example two;

[0028] Figure 4 is a structure view of example three;

[0029] Figure 5 is a fold line chart of weight detection of six iron blocks of group A;

[0030] Figure 6 is a fold line chart of weight detection of six iron blocks of group B;

[0031] Figure 7 is a fold line chart of weight detection of six iron blocks of group C;

[0032] In the figure: gun body 1, gun barrel 2, No. 1 column 21, No. 2 column 22, fan blade 23, scraper 24, No. 2 groove 241, No. 2 rod 242, electric telescopic rod 25, annular groove 26, annular block 27, ball 28, crushing unit 4, sawtooth groove 41, blade 42, No. 1 groove 43, spiral blade 431. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0034] As shown in Figures 1 to 7 ;

[0035] Example 1

[0036] An electrostatic spraying device of conductive paint, comprising a spray gun, a spray cup and an electrostatic spraying high-voltage power supply; the spray gun comprises a gun barrel 2 and a gun body 1, a No. 1 column 21 is arranged inside the gun barrel 2, one end of the No. 1 column 21 is fixedly connected to the gun body 1, and the No. 1 column 21 is located at the center position inside the gun barrel 2;

[0037] The opening of the gun barrel 2 away from the gun body 1 is conically arranged, and the aperture of the end of the gun barrel 2 away from the gun body 1 is smaller than the aperture of the middle part of the gun barrel 2;

[0038] A No. 2 column 22 is rotationally connected to the end of the No. 1 column 21 away from the gun body 1, and the outer circle of the No. 2 column 22 is uniformly fixedly connected with fan blades 23;

[0039] The end of the fan blade 23 away from the No. 2 column 22 is uniformly fixedly connected with a scraper 24; the scraper 24 is in contact with the inner wall of the gun body 1;

[0040] The scraper 24 is provided with a crushing unit 4;

[0041] When the conductive electrostatic spraying paint is sprayed into the gun through the tank, compressed air is introduced into the gun to blow the paint, and the high-pressure spray is blown to the fan blade 23 when it flows in the gun barrel 2, so that the fan blade 23 and the second column 22 rotate away from the one end of the gun body 1. When the fan blade 23 rotates, the fan blade 23 plays a role in dispersing the high-pressure spray, and when the fan blade 23 moves, the scraper 24 away from the second column 22 rotates with the fan blade 23. When the scraper 24 rotates, the scraper 24 scrapes the inner wall of the gun barrel 2, so that the scale formed on the inner wall of the gun barrel 2 is scraped, and the scale is broken by the breaking unit 4 after being scraped, so that the large particles are prevented from blocking the gun barrel 2.

[0042] As a specific embodiment of the application, the breaking unit 4 includes a sawtooth groove 41, and the scraper 24 is provided with a chamfer on one side, and the scraper 24 is arc-shaped.

[0043] In use, the breaking unit 4 includes a sawtooth groove 41, and the scraper 24 is provided with a chamfer on one side, and the scraper 24 is arc-shaped. When the fan blade 23 rotates, the scraper 24 rotates with the fan blade 23, and the sawtooth groove 41 on the scraper 24 scrapes the dirt on the scraper 24. By providing the sawtooth groove 41, the sharp part of the sawtooth groove 41 increases the pressure of the dirt, so that the scraping efficiency of the scraper 24 on the sawtooth groove 41 is increased, and by providing the scraper 24 in arc shape, when the gas blows the fan blade 23, the scraper 24 rotates, and the scraped dirt is guided out of the gun barrel 2 with the scraper 24, so that the outflow efficiency of the dirt in the gun barrel 2 is improved.

[0044] As a specific embodiment of the application, the one end of the first column 21 away from the gun body 1 is fixedly connected with an electric telescopic rod 25, and the second column 22 is rotatably connected with the electric telescopic rod 25.

[0045] In use, the first column 21 is fixedly connected with the electric telescopic rod 25 away from the gun body 1, the second column 22 is rotatably connected with the electric telescopic rod 25, when the gas blows the fan blade 23, the fan blade 23 and the second column 22 rotate at the end of the electric telescopic rod 25 away from the gun body 1, the scraper 24 rotates with the fan blade 23, the scraper 24 scrapes the inner wall of the barrel 2, and when the scraper 24 rotates, the electric telescopic rod 25 extends and retracts, so that the scraper 24 rotates while reciprocating on the inner wall of the barrel 2, thereby increasing the scraping area of the scraper 24 on the inner wall of the barrel 2, thereby improving the scraping efficiency of the scraper 24.

[0046] As a specific embodiment of the present application, the scraper 24 is provided with a second groove 241 at the end close to the outlet of the barrel 2, a second rod 242 is rotatably connected in the second groove 241 through a rotating shaft, and a torsional spring is sleeved on the rotating shaft.

[0047] In use, the second groove 241 is formed at the end of the scraper 24 close to the outlet of the barrel 2, the second rod 242 is rotatably connected in the second groove 241 through a rotating shaft, and a torsional spring is sleeved on the rotating shaft, when the electric telescopic rod 25 moves, the electric telescopic rod 25 pushes the second column 22 to move away from the gun body 1, the scraper 24 moves with the second column 22 away from the gun body 1, the second rod 242 moves with the scraper 24 away from the gun body 1, the second rod 242 rotates in the second groove 241 when it moves, and the second rod 242 is pressed against the inner wall of the gun body 1 by the torsional spring, so that the second rod 242 is tightly attached to the inner wall of the gun body 1, and when the gas flows in the second groove 241, the fan blade 23 rotates, the fan blade 23 drives the scraper 24 to rotate, the scraper 24 drives the second rod 242 to rotate, and the second rod 242 cleans the tapered wall of the barrel 2 when it rotates, thereby reducing the probability of fouling accumulation on the wall.

[0048] As a specific embodiment of the present application, the tapered opening of the barrel 2 away from the gun body 1 is provided with an annular groove 26 at the bending portion, and an annular block 27 is rotatably connected in the annular groove 26.

[0049] In use, the annular groove 26 is formed at the bending portion of the tapered opening of the barrel 2 away from the gun body 1, and the annular block 27 is rotatably connected in the annular groove 26, when the electric telescopic rod 25 extends and retracts, the second rod 242 moves with the scraper 24 away from the gun body 1, when the second rod 242 is in complete contact with the tapered inner wall of the barrel 2, the end of the scraper 24 away from the gun body 1 is in contact with the annular block 27, so that the annular block 27 rotates in the annular groove 26 when the scraper 24 rotates, thereby reducing the friction of the scraper 24 on the inner wall of the barrel 2.

[0050] As a specific embodiment of the present application, the scraper 24 is arc-shaped at one end away from the gun body 1, and the second rod 242 is arc-shaped at one end away from the scraper 24.

[0051] The one end of the second rod 242 away from the scraper 24 is provided with a rolling ball 28, and the rolling ball 28 is in contact with the inner wall of the barrel 2.

[0052] In use, by making the scraper 24 arc-shaped at one end away from the gun body 1, and making the second rod 242 arc-shaped at one end away from the scraper 24, when the electric telescopic rod 25 moves, the scraper 24 moves away from the gun body 1, and when the scraper 24 moves, the scraper 24 drives the second rod 242 to move away from the gun body 1, and by making the second rod 242 arc-shaped at one end away from the scraper 24, when the second rod 242 moves away from the gun body 1, the arc surface on the second rod 242 is in contact with the inner wall of the barrel 2, thereby reducing the friction between the second rod 242 and the inner wall of the barrel 2. By providing the rolling ball 28 at one end of the second rod 242 away from the scraper 24, the rolling ball 28 is in contact with the inner wall of the barrel 2, so that when the scraper 24 drives the second rod 242 to rotate, the rolling ball 28 is in contact with the inner wall of the barrel 2 and slides, thereby reducing the friction between the second rod 242 and the inner wall of the barrel 2.

[0053] Example two;

[0054] The difference between example two and example one is that the breaking unit 4 includes a blade 42, the blade 42 is fixedly connected to one side of the scraper 24, and the scraper 24 is arc-shaped. By making the breaking unit 4 include the blade 42, the blade 42 is fixedly connected to one side of the scraper 24, and the scraper 24 is arc-shaped. When the high-pressure gas blows the scraper 24, the fan blade 23 is blown by the gas and rotates to drive the scraper 24 to rotate, when the scraper 24 rotates, the blade 42 on the scraper 24 moves with the scraper 24, and when the blade 42 moves, the blade 42 cuts the dirt inside the barrel 2. After the blade 42 cuts the dirt, the scraper 24 scrapes the broken dirt, and then by making the scraper 24 arc-shaped, the arc-shaped scraper 24 guides the scraped dirt, so that the dirt rotates with the fan blade 23 and is discharged outside the barrel 2.

[0055] Example three;

[0056] The difference between the third embodiment and the first and second embodiments is that the breaking unit 4 comprises a first slot 43 and a spiral blade 431, the first slot 43 is arranged on one side of the scraper 24, and the spiral blade 431 is rotatably connected to the first slot 43 through a rotating shaft. By making the breaking unit 4 comprise the first slot 43 and the spiral blade 431, the first slot 43 is arranged on one side of the scraper 24, and the spiral blade 431 is rotatably connected to the first slot 43 through a rotating shaft. When the gas blows the fan blade 23, the fan blade 23 rotates, and when the fan blade 23 rotates, the fan blade 23 drives the scraper 24 to rotate, and when the scraper 24 rotates, the spiral blade 431 rotates along the inner wall of the barrel 2. When the spiral blade 431 rotates along the inner wall of the barrel 2, the sharp edge of the outer circle of the spiral blade 431 breaks the dirt on the inner wall of the barrel 2, and as the spiral blade 431 rotates, the broken dirt is guided by the spiral blade 431 to the outlet of the barrel 2, thereby breaking the dirt and preventing large particles from blocking the outlet.

[0057] Further, the first slot 43 is a fan-shaped cross-section, and the spiral blade 431 is located inside the fan-shaped slot.

[0058] In use, by making the cross-section of the first slot 43 fan-shaped, the spiral blade 431 is located inside the fan-shaped slot. When the spiral blade 431 rotates, the spiral blade 431 rotates in the fan-shaped slot, and the spiral blade 431 breaks the dirt on the inner wall of the barrel 2. When the scraper 24 rotates, the broken dirt enters the first slot 43, and the first slot 43 is fan-shaped, so that the dirt enters the first slot 43, and the spiral blade 431 rotates in the first slot 43, thereby increasing the breaking efficiency of the spiral blade 431 on the dirt after the dirt enters the first slot 43, thereby reducing the particle size of the dirt.

[0059] The specific working process is as follows:

[0060] When the conductive electrostatic spraying paint enters the spray gun through the storage tank, compressed air is introduced into the spray gun, the compressed air jet blows the paint, and the paint is sprayed in a mist state. When the high-pressure spray flows in the barrel 2, the high-pressure spray blows the fan blade 23, causing the fan blade 23 and the second column 22 to rotate away from the one end of the first column 21 of the gun body 1. When the fan blade 23 rotates, the fan blade 23 plays a role in dispersing the high-pressure spray, and when the fan blade 23 moves, the scraper 24 arranged at the end of the fan blade 23 away from the second column 22 rotates with the fan blade 23. When the scraper 24 rotates, the scraper 24 scrapes the inner wall of the barrel 2, thereby scraping the scale formed on the inner wall of the barrel 2. By arranging the breaking unit 4 on the scraper 24, the scale on the barrel 2 is broken after being scraped, thereby avoiding large particles from blocking the barrel 2.

[0061] To verify the specific use effect of the present application, the related application personnel of the present application carried out the following experiment:

[0062] 1. Experiment and parameter analysis:

[0063] 1.1 Purpose of the experiment: through the experiment, the differences between the existing spray guns on the market and the spray gun designed by the present application when using electrostatic spraying are compared, so as to prove the use effect of the present application;

[0064] 1.2 Experimental equipment: the spray gun designed by the present application, the spray gun of China Taiwan Hai Ma and the spray gun of China Taiwan Yuan Qi; a spraying hanger, 5 iron blocks and a weight measuring instrument;

[0065] 1.3 Experimental steps: by selecting 18 iron blocks of the same size, the 18 iron blocks are divided into three groups, each group has six iron blocks, then the three spray guns corresponding to each group of iron blocks are used, the spray gun designed by the present application and a group of iron blocks are A group, the spray gun of China Taiwan Hai Ma and a group of iron blocks are B group, and the spray gun of China Taiwan Yuan Qi and a group of iron blocks are C group;

[0066] Each group of spray guns uses 3000g of spraying paint to spray six iron blocks, 500g each time, each iron block weighs 500g, then each sprayed iron block is weighed, the weight data of the weighed iron block is recorded, and summarized into a table;

[0067] 1.4 Experimental results are shown;

[0068] Figure 1 and Figure 5 are the data table of the spray gun designed by the present application and the corresponding line chart;

[0069]

[0070] Figure 1

[0071] Figure 3 and Figure 6 are the data table of the spray gun of China Taiwan Hai Ma and the corresponding line chart of the table;

[0072]

[0073] Figure 3

[0074] Figure 5 and Figure 7 are the data table of the spray gun of China Taiwan Yuan Qi and the corresponding line chart of the table;

[0075]

[0076] Figure 5

[0077] 1.5 Experimental result analysis:

[0078] Through the analysis of the above Figure 3 group experimental data, through the broken line graph, it can be clearly seen that the spray gun designed in the application keeps the spraying coating loss within 15g after internal cleaning, and through the analysis of the broken line graph, it can be seen that the coating utilization rate after spraying is relatively stable.

[0079] 1.6 Experimental conclusion:

[0080] The electrostatic spraying gun designed in the application is superior to the existing electrostatic spraying gun on the market when used.

[0081] Front, back, left, right, up, down are based on the Figure 2 in the drawings, according to the standard of the human observation angle, the side of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on.

[0082] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0083] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. All other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

Claims

1. An electrostatic spraying device for conductive coatings, comprising a spray gun, a spray cup, and an electrostatic spraying high-voltage power supply; characterized in that: The spray gun includes a gun body (1) and a gun barrel (2). A first post (21) is installed inside the gun barrel (2). One end of the first post (21) is fixed to the gun body (1), and the first post (21) is located at the center of the gun barrel (2). The opening of the gun barrel (2) away from the gun body (1) is tapered, and the diameter of the end of the gun barrel (2) away from the gun body (1) is smaller than the diameter of the middle part of the gun barrel (2). A second post (22) is rotatably connected to the end of the first post (21) away from the gun body (1). (22) Fan blades (23) are uniformly fixed to the outer ring; a scraper (24) is uniformly fixed to the end of the fan blades (23) away from the second column (22); the scraper (24) is in contact with the inner wall of the gun body (1); an electric telescopic rod (25) is fixed to the end of the first column (21) away from the gun body (1), and the second column (22) is rotatably connected to the electric telescopic rod (25); a crushing unit (4) is provided on the scraper (24); the crushing unit (4) is a sawtooth groove (41) or a blade (42) or a spiral cutter. The crushing unit (4) includes a sawtooth groove (41), and a chamfer is provided on one side of the scraper (24). The scraper (24) is arc-shaped, and the sawtooth groove (41) is provided on one side of the chamfer of the scraper (24). The crushing unit (4) includes a blade (42), which is fixedly connected to one side of the scraper (24). The scraper (24) is arc-shaped. The crushing unit (4) includes a first groove (43) and a spiral blade (431). The first groove (43) is provided on one side of the scraper (24). On one side of the plate (24), the spiral blade (431) is rotatably connected to the first groove (43) via a rotating shaft; when the scraper (24) rotates, the spiral blade (431) rotates along the inner wall of the barrel (2). When the spiral blade (431) rotates on the inner wall of the barrel (2), the sharp edge of the outer ring of the spiral blade (431) breaks up the dirt on the inner wall of the barrel (2), and as the spiral blade (431) rotates, the broken dirt is guided by the spiral blade (431) to the outlet of the barrel 2.

2. The electrostatic spraying device for conductive coatings according to claim 1, characterized in that: The first groove (43) has a fan-shaped cross section, and the spiral blade (431) is located inside the fan-shaped groove.

3. The electrostatic spraying device for conductive coatings according to claim 1, characterized in that: The scraper (24) has a second groove (241) at one end near the outlet of the gun barrel (2). A second rod (242) is rotatably connected in the second groove (241) via a rotating shaft. A torsion spring is sleeved on the rotating shaft.

4. The electrostatic spraying device for conductive coatings according to claim 1, characterized in that: The barrel (2) has an annular groove (26) at the bend of the conical opening at the end away from the gun body (1), and the annular groove (26) is rotatably connected to an annular block (27).

5. The electrostatic spraying device for conductive coatings according to claim 3, characterized in that: The end of the scraper (24) away from the gun body (1) is arc-shaped, and the end of the second rod (242) away from the scraper (24) is arc-shaped.

6. The electrostatic spraying device for conductive coatings according to claim 3, characterized in that: The end of the second rod (242) away from the scraper (24) is provided with a ball bearing (28) that rolls and contacts the inner wall of the barrel (2).

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