Special electrostatic spray gun for metal powder

Abstract

The utility model relates to the field of electrostatic spraying, in particular to a special electrostatic spraying gun for metal powder, which comprises an electrostatic spraying gun body, one side of the electrostatic spraying gun body is communicated with a powder feeding seat, the upper part of the powder feeding seat is provided with a powder funnel, the other side of the electrostatic spraying gun body is provided with a driving motor, and the output end of the driving motor extends into a dust cavity in the powder feeding seat. A friction wall assembly is arranged on one side of the inner wall of the dust cavity, and a conveying opening is formed in the other side of the inner wall of the dust cavity. According to the metal powder screening device, metal powder enters the powder feeding base through the powder funnel and enters the dust cavity under the rotating conveying effect of the spiral blade, the rotating special-shaped friction block is arranged in the dust cavity, and the special-shaped friction block is matched with the friction wall assembly to screen and grind large particles in the metal powder; and the metal powder is thrown into the conveying opening through the guiding effect of the special-shaped friction block, and powder supply is conducted through the powder conveying pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spraying, in particular to a special electrostatic spray gun for metal powder. Background Art

[0002] Powder electrostatic spray gun is mainly a spraying tool for surface coating, mainly used for metal surface coating. Currently, metal powder spraying is needed in the fields of aviation and aerospace, automobile and machinery manufacturing industries. When the metal powder is sprayed out of the electrostatic spray gun, the electric charge is captured to become charged powder. Under the action of airflow, electric field and its own gravity, it flies to the grounded workpiece and adsorbs on the surface to form a uniform coating.

[0003] During the spraying process, metal powder enters the gun body through a specific powder supply system and is transported through the gun body to the nozzle for spraying. In the actual application of traditional spray guns, large particles of unevenly shaped metal powder may interfere with the normal operation of the electrostatic spray gun, not only clogging the nozzle, but also uneven metal powder will cause uneven coating during the spraying process, and will also cause certain wear and tear on the inside of the gun body. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a special electrostatic spray gun for metal powder.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The electrostatic spray gun for metal powder comprises an electrostatic spray gun body, one side of the electrostatic spray gun body is connected with a powder feed seat, a powder hopper is installed on the upper part of the powder feed seat, and a driving motor is installed on the other side, the output end of the driving motor extends into the powder feed seat, and the driving motor is connected with a spiral blade and a special-shaped friction block, the special-shaped friction block is rotatably installed in the dust chamber, a friction wall component is arranged on one side of the inner wall of the dust chamber, and a conveying port is opened on the other side;

[0007] The friction wall assembly comprises a first friction wall and a second friction wall, wherein the first friction wall and the second friction wall are respectively installed on the upper and lower sides of the inner wall of the dust chamber, and the thickness of the first friction wall is smaller than that of the second friction wall.

[0008] Preferably, the output end of the driving motor is driven and connected to a driving shaft, one end of the driving shaft extends into the powder inlet seat and the dust chamber respectively, and is rotatably installed on the inner wall of the dust chamber, wherein a spiral blade is fixedly connected to one side of the driving shaft, and a special-shaped friction block is installed on the other side of the special-shaped friction block.

[0009] Preferably, the spiral blade is rotatably mounted in the powder inlet seat, and the special-shaped friction block is rotatably mounted in the dust chamber.

[0010] Preferably, a dust chamber is provided on one side of the interior of the electrostatic spray gun body, a delivery port is provided on one side of the dust chamber, and a powder delivery pipe is connected to the bottom of the delivery port.

[0011] Preferably, a connecting port is provided at the upper portion of the powder inlet seat, a thread is provided on the inner wall of the connecting port, and a powder funnel is screwed onto the connecting port via the thread.

[0012] Preferably, the special-shaped friction block comprises a plurality of friction blocks, wherein each friction block is obliquely mounted on the drive shaft, an oblique gap is left between each friction block, and each friction block is provided with a protrusion.

[0013] The beneficial effects of the utility model are:

[0014] In the utility model, metal powder enters the powder inlet seat through the powder funnel, and enters the dust chamber under the rotating conveying action of the spiral blade. A rotating special-shaped friction block is provided in the dust chamber. The special-shaped friction block cooperates with the friction wall assembly to screen and grind large particles in the metal powder, and throws the metal powder to the conveying port through the guiding action of the special-shaped friction block, and supplies powder through the powder conveying pipe. Compared with the traditional electrostatic spray gun, this device can effectively screen and grind large-particle metal powder, and avoid the situation where it enters the powder supply system and causes a decrease in spraying efficiency. This device effectively alleviates the problem of nozzle clogging, extends the service life, and improves the spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the external structure of the electrostatic spray gun for metal powder proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the external structure of the powder inlet seat of the electrostatic spray gun for metal powder proposed by the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the powder inlet seat of the electrostatic spray gun for metal powder proposed by the utility model;

[0018] Figure 4 The utility model is a schematic diagram of the structure of the special-shaped friction block of the electrostatic spray gun for metal powder.

[0019] In the figure: 1-electrostatic spray gun body, 101-powder delivery pipe, 2-powder funnel, 3-powder inlet seat, 31 driving motor, 32-connecting port, 4-spiral blade, 5-driving shaft, 6-first friction wall, 61-second friction wall, 7-special-shaped friction block, 71-bump, 8-delivery port, 9-dust chamber. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-4 The embodiment of the utility model provides an electrostatic spray gun for metal powder, including an electrostatic spray gun body 1, one side of the electrostatic spray gun body 1 is connected to a powder feed seat 3, a powder hopper 2 is installed on the upper part of the powder feed seat 3, and a drive motor 31 is installed on the other side, the output end of the drive motor 31 extends into the powder feed seat 3, and is driven and connected with a spiral blade 4 and a special-shaped friction block 7, the special-shaped friction block 7 is rotatably installed in a dust chamber 9, a friction wall assembly is provided on one side of the inner wall of the dust chamber 9, and a conveying port 8 is opened on the other side.

[0022] Further, such as Figure 3 As shown, the friction wall assembly may include a first friction wall 6 and a second friction wall 61 , wherein the first friction wall 6 and the second friction wall 61 are respectively installed on the upper and lower sides of the inner wall of the dust chamber 9 , and the thickness of the first friction wall 6 is less than the thickness of the second friction wall 61 .

[0023] like Figure 3 As shown, the output end of the driving motor 31 is drivingly connected to the driving shaft 5, one end of the driving shaft 5 extends into the powder inlet seat 3 and the dust chamber 9 respectively, and is rotatably installed on the inner wall of the dust chamber 9, wherein a spiral blade 4 is fixedly connected to one side of the driving shaft 5, and a special-shaped friction block 7 is installed on the other side of the special-shaped friction block 7.

[0024] In addition, the spiral blade 4 is rotatably installed in the powder feeding seat 3, and the special-shaped friction block 7 is rotatably installed in the dust chamber 9.

[0025] Furthermore, a dust chamber 9 is provided on one side of the interior of the electrostatic spray gun body 1 , a delivery port 8 is provided on one side of the dust chamber 9 , and a powder delivery pipe 101 is connected to the bottom of the delivery port 8 .

[0026] Furthermore, a connection port 32 is provided at the upper portion of the powder inlet seat 3 , a thread is provided on the inner wall of the connection port 32 , and the powder funnel 2 is screwed onto the connection port 32 via the thread.

[0027] like Figure 4 As shown, the special-shaped friction block 7 may include a plurality of friction blocks, wherein each friction block is obliquely mounted on the drive shaft 5, and an oblique gap is left between each friction block, and a protrusion 71 is provided on each friction block.

[0028] In this embodiment, the metal powder is introduced into the powder hopper. During the actual use of the electrostatic spray gun, the drive motor 31 operates along with the operation of the electrostatic spray gun body 1. The drive motor 31 drives the drive shaft 5 in the powder inlet seat 3 to rotate, and under the guidance of the spiral blade 4, the powder is transported to the powder chamber 9 on the other side. The metal powder enters the rotating special-shaped friction block 7, and the special-shaped friction block 7 drives the metal powder to rub against the first friction wall 6 and the second friction wall 61 in the powder chamber 9, and sieves and grinds large particles of dust. The first friction wall 6 and the second friction wall 61 are set to different thicknesses, which can effectively improve the grinding efficiency of the metal powder. At the same time, since the special-shaped friction block 7 is obliquely installed on the drive shaft 5, the metal powder is thrown to the conveying port 8 on the other side through the oblique gap between the special-shaped friction blocks 7 and under the action of continuous rotation, and under the action of the electrostatic spray gun body 1, the metal powder is transported through the powder conveying pipe 101, and the spraying operation is performed through the electrostatic spray gun body 1.

[0029] In the utility model, metal powder enters the powder inlet seat 3 through the powder funnel 2, and enters the dust chamber 9 under the rotating conveying action of the spiral blade 4. A rotating special-shaped friction block 7 is provided in the dust chamber 9. The special-shaped friction block 7 cooperates with the friction wall assembly to screen and grind large particles in the metal powder, and throws the metal powder to the conveying port 8 through the guiding action of the special-shaped friction block 7, and supplies powder through the powder conveying pipe 101. Compared with the traditional electrostatic spray gun, this device can effectively screen and grind large-particle metal powder, and avoid its entry into the powder supply system to cause a decrease in spraying efficiency. This device effectively alleviates the problem of nozzle clogging, extends the service life, and improves the spraying efficiency.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electrostatic spray gun for metal powder, comprising an electrostatic spray gun body (1), characterized in that: One side of the electrostatic spray gun body (1) is connected to a powder feed seat (3), a powder hopper (2) is installed on the upper part of the powder feed seat (3), and a driving motor (31) is installed on the other side, the output end of the driving motor (31) extends into the powder feed seat (3), and is driven by a spiral blade (4) and a special-shaped friction block (7), the special-shaped friction block (7) is rotatably installed in the dust chamber (9), a friction wall component is provided on one side of the inner wall of the dust chamber (9), and a conveying port (8) is opened on the other side; The friction wall assembly comprises a first friction wall (6) and a second friction wall (61), wherein the first friction wall (6) and the second friction wall (61) are respectively mounted on the upper and lower sides of the inner wall of the dust chamber (9), and the thickness of the first friction wall (6) is smaller than the thickness of the second friction wall (61).

2. The electrostatic spray gun for metal powder according to claim 1, characterized in that: The output end of the driving motor (31) is drivingly connected to a driving shaft (5), one end of which extends into the powder inlet seat (3) and the dust chamber (9) respectively, and is rotatably mounted on the inner wall of the dust chamber (9), wherein a spiral blade (4) is fixedly connected to one side of the driving shaft (5), and a special-shaped friction block (7) is mounted on the other side of the special-shaped friction block (7).

3. The electrostatic spray gun for metal powder according to claim 2, characterized in that: The spiral blade (4) is rotatably mounted in the powder inlet seat (3), and the special-shaped friction block (7) is rotatably mounted in the dust chamber (9).

4. The electrostatic spray gun for metal powder according to claim 1, characterized in that: A dust chamber (9) is provided on one side of the interior of the electrostatic spray gun body (1), a conveying port (8) is provided on one side of the dust chamber (9), and a powder conveying pipe (101) is connected to the bottom of the conveying port (8).

5. The electrostatic spray gun for metal powder according to claim 1, characterized in that: The upper part of the powder inlet seat (3) is provided with a connection port (32), the inner wall of the connection port (32) is provided with a thread, and the powder funnel (2) is screwed onto the connection port (32) through the thread.

6. The electrostatic spray gun for metal powder according to claim 1, characterized in that: The special-shaped friction block (7) comprises a plurality of friction blocks, each of which is obliquely mounted on the drive shaft (5), with oblique gaps left between each of the friction blocks, and each of the friction blocks is provided with a protrusion (71).

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