Electrostatic powder spray gun for pipes

Abstract

The utility model discloses an electrostatic powder spraying gun for use in pipelines, comprising a powder spraying gun body, a powder feeding pipe and a discharge needle body, wherein the powder feeding pipe is located in the powder spraying gun body and protrudes from the upper end of the powder spraying gun body, the discharge needle body is located at the lower end of the powder spraying gun body, the powder feeding pipe is communicated with the inside of the discharge needle body, an outer ring is arranged on the outer side surface of the upper end of the discharge needle body, positioning ribs are arranged between the outer ring and the discharge needle body, a discharge needle fixing tube is sleeved on the outer side surface of the discharge needle body, a raised ring is arranged on the upper end of the discharge needle fixing tube, a groove engaged with the positioning rib is arranged on the raised ring, a rib plate is arranged on the outer side surface of the discharge needle body, and the outer side surface of the rib plate is fitted with the inner side surface of the discharge needle fixing tube. The electrostatic powder spraying gun for use in pipelines can ensure that the discharge needle body remains stable when rotating to prevent it from vibrating, so that the powder thickness covering the inner wall of the pipeline is the same, thereby greatly improving the equipment accuracy of tubular parts.

Description

Technical Field

[0001] The utility model relates to the technical field of powder spray guns, in particular to an electrostatic powder spray gun used in pipelines. Background Art

[0002] The electrostatic powder spray gun is a key spraying equipment in powder spraying equipment. Its main working principle is to use a high-voltage electrostatic generator to ionize the air around the powder spray gun head to generate a negative electrostatic magnetic field, so that the powder is adsorbed onto the positive workpiece to be coated.

[0003] When spraying tubular parts, higher requirements are placed on the uniformity of the coating, which is related to the accuracy of assembly. The powder spray gun currently used has a discharge needle that is too long, which causes the needle body to shake when rotating, causing the sprayed powder to spread unevenly and the coating coverage thickness on the inner wall of the pipe to be different, affecting the final assembly accuracy. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide an electrostatic powder spraying gun for use in pipelines, which can ensure that the discharge needle body remains stable when rotating and prevent its vibration, so that the thickness of powder covering the inner wall of the pipeline is the same, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electrostatic powder spray gun for use in a pipeline, comprising a powder spray gun body, a powder feed pipe and a discharge needle body, wherein the powder feed pipe is located in the powder spray gun body and protrudes from the upper end of the powder spray gun body, the discharge needle body is located at the lower end of the powder spray gun body, the powder feed pipe is communicated with the inside of the discharge needle body, an outer ring is provided on the outer side surface of the upper end of the discharge needle body, a positioning rib is provided between the outer ring and the discharge needle body, a discharge needle fixing tube is sleeved on the outer side surface of the discharge needle body, a raised ring is provided on the upper end of the discharge needle fixing tube, a groove engaged with the positioning rib is provided on the raised ring, a rib plate is provided on the outer side surface of the discharge needle body, and the outer side surface of the rib plate is in contact with the inner side surface of the discharge needle fixing tube.

[0006] As a preferred technical solution of the utility model, the number of the positioning ribs is three, and the three positioning ribs are evenly distributed between the outer ring and the discharge needle body.

[0007] As a preferred technical solution of the utility model, the ribs are in two groups, each group has three ribs, and are evenly distributed on the outer side of the discharge needle body in a ring shape.

[0008] As a preferred technical solution of the utility model, a grid is arranged in the powder inlet pipe near the inlet, and the upper surface of the grid is conical.

[0009] As a preferred technical solution of the utility model, the outer diameters of the outer ring and the raised ring are smaller than the inner diameter of the powder spray gun body, the lower end of the powder spray gun body is threadedly connected with a gun body nut, and the discharge needle fixing tube passes through the gun body nut.

[0010] As a preferred technical solution of the utility model, the lower end of the discharge needle body is sleeved with a bell mouth.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the electrostatic powder spraying gun for use in pipelines is reasonably designed and ingeniously conceived, and the position of the discharge needle body is limited by adding a discharge needle fixing tube and the discharge needle body through the clamping connection of the groove and the positioning ribs, and at the same time, a rib plate is added on the outside of the discharge needle body to be in close contact with the inner wall of the discharge needle fixing tube, so as to further prevent the discharge needle body from vibrating, ensure the uniformity of powder spraying, and greatly improve the equipment accuracy of tubular parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is an exploded view of the utility model;

[0014] Figure 3 This is the main view of the powder inlet pipe;

[0015] Figure 4 for Figure 3 A top view of

[0016] Figure 5 It is a schematic diagram of the structure of the discharge needle fixing tube;

[0017] Figure 6 It is a schematic diagram of the structure of the discharge needle body.

[0018] In the figure: 1 powder inlet pipe, 2 powder spray gun body, 3 gun body nut, 4 discharge needle fixing tube, 5 bell mouth, 6 discharge needle body, 7 grid, 8 raised ring, 9 groove, 10 outer ring, 11 positioning rib, 12 rib plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments (for the convenience of description and understanding, the following is a schematic diagram of the present invention). Figure 1 Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0020] See also Figure 1-4The utility model provides a technical solution: an electrostatic powder spray gun for use in a pipeline, comprising a powder spray gun body 2, a powder inlet pipe 1 and a discharge needle body 6, the powder inlet pipe 1 is connected to an external powder supply system, a high-pressure air inlet and an energized component are arranged on the powder spray gun body 2, the powder inlet pipe 1 is located in the powder spray gun body 2 and protrudes from the upper end of the powder spray gun body 2, the discharge needle body 6 is located at the lower end of the powder spray gun body 2, and the powder inlet pipe 1 is connected to the inside of the discharge needle body 6;

[0021] like Figure 5-6 An outer ring 10 is provided on the outer side surface of the upper end of the discharge needle body 6, and a positioning rib 11 is provided between the outer ring 10 and the discharge needle body 6. The outer side surface of the discharge needle body 6 is sleeved with a discharge needle fixing tube 4, and a raised ring 8 is provided on the upper end of the discharge needle fixing tube 4. A groove 9 engaged with the positioning rib 11 is provided on the raised ring 8. A rib plate 12 is provided on the outer side surface of the discharge needle body 6, and the outer side surface of the rib plate 12 fits with the inner side surface of the discharge needle fixing tube 4. The outer diameters of the outer ring 10 and the raised ring 8 are both smaller than the inner diameter of the powder spray gun body 2. The lower end of the powder spray gun body 2 is threadedly connected with a gun body nut 3, and the discharge needle fixing tube 4 passes through the gun body nut 3.

[0022] Furthermore, the number of the positioning ribs 11 is three, and the three positioning ribs 11 are evenly distributed between the outer ring 10 and the discharge needle body 6 , corresponding to the number of the grooves 9 on the discharge needle fixing tube 4 being three, so as to ensure the connection stability.

[0023] Furthermore, there are two groups of rib plates 12, each group of rib plates 12 has three rib plates 12, which are evenly distributed on the outer side of the discharge needle body 6 in a ring shape, effectively preventing the discharge needle body 6 from vibrating.

[0024] Furthermore, a grid 7 is provided near the inlet of the powder inlet pipe 1, and the upper surface of the grid 7 is a conical protrusion, which can break up the incoming agglomerated powder to ensure the powder spraying quality.

[0025] Furthermore, the lower end of the discharge needle body 6 is sleeved with a bell mouth 5 to facilitate uniform dispersion and spraying of the powder.

[0026] When in use: the discharge needle fixing tube 4 is sleeved on the outside of the discharge needle body 6. At this time, the rib plate 12 on the outer side of the discharge needle body 6 contacts the inner wall of the discharge needle fixing tube 4, and the groove 9 at the upper end of the discharge needle fixing tube 4 is clamped with the positioning rib 11 on the outer side of the discharge needle fixing tube 4. Finally, the gun body nut 3 passes through the discharge needle fixing tube 4 and is threadedly connected to the lower end of the powder spray gun body 2 to complete the positioning of the discharge needle body 6.

[0027] The utility model can be conveniently operated, occupies less space when in use, is easy to operate and use; can effectively position the discharge needle body 6 to prevent it from shaking during rotation, ensure the uniformity of powder spraying on the inner wall of the pipeline, and improve the assembly accuracy of tubular parts.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrostatic powder spray gun for use in a pipeline, comprising a powder spray gun body (2), a powder inlet pipe (1) and a discharge needle body (6), wherein the powder inlet pipe (1) is located in the powder spray gun body (2) and protrudes from the upper end of the powder spray gun body (2), the discharge needle body (6) is located at the lower end of the powder spray gun body (2), and the powder inlet pipe (1) is connected to the inside of the discharge needle body (6), characterized in that: The outer side surface of the upper end of the discharge needle body (6) is provided with an outer ring (10), and a positioning rib (11) is provided between the outer ring (10) and the discharge needle body (6). The outer side surface of the discharge needle body (6) is sleeved with a discharge needle fixing tube (4), and the upper end of the discharge needle fixing tube (4) is provided with a raised ring (8), and the raised ring (8) is provided with a groove (9) that is engaged with the positioning rib (11). The outer side surface of the discharge needle body (6) is provided with a rib plate (12), and the outer side surface of the rib plate (12) is in contact with the inner side surface of the discharge needle fixing tube (4).

2. The electrostatic powder spray gun for use in pipelines according to claim 1, characterized in that: The number of the positioning ribs (11) is three, and the three positioning ribs (11) are evenly distributed between the outer ring (10) and the discharge needle body (6).

3. The electrostatic powder spray gun for use in pipelines according to claim 1, characterized in that: The rib plates (12) are in two groups, each group of rib plates (12) has three rib plates (12) which are evenly distributed in a ring shape on the outer side surface of the discharge needle body (6).

4. The electrostatic powder spraying gun for use in pipelines according to claim 1, characterized in that: A grid (7) is provided in the powder inlet pipe (1) near the inlet, and the upper surface of the grid (7) is conical.

5. The electrostatic powder spraying gun for use in pipelines according to claim 1, characterized in that: The outer diameters of the outer ring (10) and the raised ring (8) are both smaller than the inner diameter of the powder spray gun body (2); the lower end of the powder spray gun body (2) is threadedly connected to a gun body nut (3); and the discharge needle fixing tube (4) passes through the gun body nut (3).

6. The electrostatic powder spraying gun for use in pipelines according to claim 1, characterized in that: The lower end of the discharge needle body (6) is sleeved with a bell mouth (5).

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