Powder coating spraying gun barrel with optimized structure

Abstract

The utility model discloses a powder coating spraying gun barrel with an optimized structure, which belongs to the technical field of structural optimization of general equipment components and comprises an outer tube, an inner tube, a supporting component and a sealing plate. The supporting part comprises a small supporting plate and a large supporting plate which are arranged between the outer pipe and the inner pipe; the inner wall of the outer pipe is provided with at least two through holes used for fixing the large supporting plate. The plurality of small supporting plates are arranged on the inner wall of the outer pipe, every two small supporting plates are symmetrically arranged relative to the cross section of the inner pipe, every two small supporting plates form a group, the plurality of groups of small supporting plates are distributed on the inner wall of the outer pipe at intervals, and the small supporting plates, located on the same side, of every two adjacent groups of small supporting plates are arranged at a certain angle in a staggered mode; the sealing plate is of an annular structure and clamped between the inner wall of the outer pipe and the outer wall of the inner pipe. The spraying gun barrel structure of existing long straight pipeline polyethylene plastic coating equipment is optimized, the structural performance of the spraying gun barrel is improved, the circulation and heating effects of a plastic coating medium are improved, and the plastic coating quality of products is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of general equipment component structure optimization, and more particularly to a powder coating spraying gun pipe with optimized structure. BACKGROUND

[0002] Pipe polyethylene (PE) coating technology is a leading technology for pipe anticorrosion, which uniformly adheres special polyethylene powder coating to the inner surface of a preheated pipe by using hot melting principle to form a stable and continuous protective coating, and the polyethylene inner coating of the steel pipe has excellent anticorrosion performance. The polyethylene coating equipment for long straight pipes is the core equipment for pipe polyethylene coating construction, which injects polyethylene powder into the pipe through a spraying gun pipe (powder supply device), and a rotating table on the coating device rotates the pipe along the central axis, the spraying gun pipe extends into the pipe along the central axis, and the relative movement between the equipment and the rotating pipe causes the spraying powder to uniformly adhere to the inner wall of the pipe, and the adhered powder is dissolved on the inner wall of the pipe when heated, and forms a plastic layer after water cooling.

[0003] The spraying gun pipe is an important component of the polyethylene coating equipment for long straight pipes, and is a flow channel and spraying outlet for powder coating. Due to the long length of the construction pipe, the spraying gun pipe has the characteristics of small cross section, long extension length, double-layer structure, etc., and its structural performance will affect the flow and heating effect of the powder coating in its interior, and further affect the coating quality of the product. During the use of the pipe polyethylene coating equipment of the existing equipment manufacturers, it is found that the spraying gun pipe has problems such as large deflection deformation and easy blockage. In order to improve the coating effect and enhance the equipment performance, new improvement design requirements are put forward for the spraying gun pipe. SUMMARY

[0004] The present application aims to optimize the structure of the spraying gun pipe of the existing polyethylene coating equipment for long straight pipes, improve the structural performance of the spraying gun pipe, improve the flow and heating effect of the coating medium, and improve the coating quality of the product.

[0005] In order to achieve the above purpose, the present application provides a powder coating spraying gun pipe with optimized structure, which comprises an outer pipe, an inner pipe arranged in the outer pipe, a support component for supporting the outer pipe and the inner pipe, and a sealing plate fixed to the end of the outer pipe.

[0006] The support component comprises a small support plate and a large support plate arranged between the outer pipe and the inner pipe; at least two through holes for fixing the large support plate are arranged on the inner wall of the outer pipe, and the outer pipe is fixedly connected with the large support plate.

[0007] A plurality of small support plates are arranged on the inner wall of the outer tube, with each two small support plates forming a group. The small support plates of each group are symmetrically arranged about the axis of the inner tube. The multiple groups of small support plates are spaced apart on the inner wall of the outer tube. The small support plates of two adjacent groups of small support plates on the same side are staggered at a certain angle. The small support plates are fixedly connected to the inner wall of the outer tube.

[0008] The sealing plate is an annular structure, and is clamped between the inner wall of the outer tube and the outer wall of the inner tube. Two sealing plates are provided, and are respectively arranged at both ends of the outer tube.

[0009] In some embodiments, the outer tube and the inner tube are hollow steel tubes.

[0010] In some embodiments, the inner tube is a seamless hollow steel tube.

[0011] In some embodiments, the number of the through holes is 2-4.

[0012] In some embodiments, the large support plate is welded at the through hole.

[0013] In some embodiments, longitudinal ends of the small support plate and the large support plate in contact with the outer tube are chamfered respectively.

[0014] In some embodiments, the large support plate and the small support plate are connected to the outer wall of the inner tube at a side away from the outer tube.

[0015] In some embodiments, the large support plates are distributed on both sides of the axis of the inner tube.

[0016] In some embodiments, the large support plates are staggered and distributed on both sides of the center of mass of the outer tube.

[0017] In some embodiments, two adjacent groups of small support plates are distributed on the outer wall of the inner tube at an angle of 90°.

[0018] The beneficial effects of the present invention are:

[0019] The present invention improves the deflection and deformation of the inner tube by adding alternately arranged support components, maintaining a uniform spacing between the inner and outer tubes at each segmented interface. This allows the powder coating (powder or particles) to flow evenly forward through the inner tube when not heated, preventing the accumulation of powder coating due to excessive deflection and bending, which could cause pipe blockage. During heating, the medium is evenly heated and fully melted, resulting in a more uniform coating effect and better product surface quality. The present invention also includes chamfering treatment on the longitudinal ends of the small and large support plates where they contact the outer tube, facilitating production and construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a working state schematic diagram of the spray gun tube of the present application;

[0021] Figure 2 is a schematic diagram of the internal structure of the spray gun tube of the present application;

[0022] Figure 3 is a distribution diagram of the small support plate of the spray gun tube of the present application;

[0023] Figure 4 is a distribution diagram of the support assembly of the spray gun tube of the present application;

[0024] Figure 5 is a schematic diagram of the connection between the large support plate and the outer tube of the spray gun tube of the present application;

[0025] Figure 6 is a side view of the spray gun tube of the present application;

[0026] Figure 7 is a schematic diagram of the structure of the spray gun tube of the prior art;

[0027] Figure 8 is an analysis diagram of the displacement deformation of the inner tube of the spray gun tube of the prior art;

[0028] Figure 9 is an analysis diagram of the displacement deformation of the working state of the spray gun tube of the prior art;

[0029] Figure 10 is an analysis diagram of the displacement deformation of the inner tube of the spray gun tube of the present application;

[0030] Figure 11 is an analysis diagram of the displacement deformation of the working state of the spray gun tube of the present application.

[0031] In the figure, 1 is the outer tube, 2 is the inner tube, 3 is the small support plate, 4 is the sealing plate, 5 is the large support plate, A represents the plastic spraying medium, B represents high-pressure air, C represents two welding holes, D represents four welding holes, E represents two welding holes, and URES is the deformation amount. DETAILED DESCRIPTION

[0032] Further description will be made below in combination with examples and the accompanying drawings.

[0033] The structural composition of the present application is as follows:

[0034] As Figures 1-6As shown, the polyethylene coating equipment spraying gun tube with optimized structure of the application mainly consists of 5 types of components. The outer tube 1, the inner tube 2, the small support plate 3, the sealing plate 4, and the large support plate 5. The outer tube 1 is made of round steel tube, which plays a supporting and protecting role for the inner tube 2 from being heated too early. The outer tube 1 is spaced apart by a certain distance to form a group of through holes, which are used for welding the large support plate 5. The inner tube 2 is a flow channel for coating medium and is made of seamless round steel tube. The small support plates 3 are uniformly arranged along the length direction of the inner tube 2. The centers of gravity of every two small support plates 3 are in the same plane and symmetrically arranged with the longitudinal axis of the inner tube 2. Each adjacent two groups are alternately arranged at an angle of 90°. The inner tube 2 and the outer tube 1 are connected by the large support plate 5 and the sealing plate 4 to form the overall structure of the spraying gun tube. The longitudinal end portions of the small support plate 3 and the large support plate 5 in contact with the outer tube 1 are chamfered, which facilitates production and construction.

[0035] Effect analysis:

[0036] 1. Analysis of the original structure (prior art) spraying gun tube:

[0037] As shown in the original structure, Figures 7-9 the inner tube 2 and the outer tube 1 are connected only by the sealing plates 4 at both ends, and the rest is in a hollow form. The inner tube 2 is in a simply supported beam state. Due to its long length, the deflection deformation is large after checking calculation. The low point in the middle will be in close contact with the outer tube 1. The spraying gun tube is 6000mm long, and the maximum displacement is 15.68mm after calculation, which is greater than half of the difference between the inner diameter of the outer tube 1 (54mm) and the outer diameter of the inner tube 2 (30mm), i.e. 12mm. The inner tube 2 has already adhered to the inner wall of the outer tube 1 under the influence of its own weight. The powder coating relies on high-pressure airflow to flow in the tube. The impact of high-pressure airflow on the inner tube 2 will make its form more unstable, which will adversely affect the flow of the medium and easily cause medium accumulation and blockage.

[0038] The spraying gun tube is in a cantilever beam state during use. After checking calculation, the maximum displacement of the nozzle outlet end of the original structure spraying gun tube is about 155mm.

[0039] 2. Analysis of the spraying gun tube with optimized structure of the application:

[0040] As shown in the original structure, Figures 10-11 by increasing the support components between the inner and outer tubes, the deformation of the inner tube will be greatly improved or close to zero. The inner and outer tubes are close to a whole structure, which further ensures the best flow of powder coating in the inner tube, obtains uniform heating effect, and further obtains excellent spraying quality.

[0041] The spraying gun tube is in a cantilever beam state during use. After checking calculation, the maximum displacement of the nozzle outlet end of the spraying gun tube with optimized structure is about 114.8mm, which is reduced by 40.2mm compared with the original structure.

[0042] The design principle of the present application is:

[0043] The present application relates to the technical field of general equipment component structure optimization, in particular to a polyethylene spraying equipment gun tube with an optimized structure, which comprises an outer tube 1, an inner tube 2, a support component and a sealing plate 4. By increasing the alternately arranged support components, the deflection deformation of the inner tube is improved, the spacing between the inner and outer tubes at each sectional interface is kept uniform, so that the powder coating (powder or particles) can uniformly flow forward when passing through the inner tube 2 without heating, avoiding the powder coating from forming accumulation and causing pipeline blockage due to excessive deflection and bending deformation, and the medium can be uniformly heated when heated, so as to fully melt and further obtain more uniform spraying effect and better product surface quality.

[0044] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A powder coating spray gun barrel with an optimized structure, characterized in that: It comprises an outer tube (1), an inner tube (2) passing through the outer tube (1), a supporting component for supporting the outer tube (1) and the inner tube (2), and a sealing plate (4) fixed to the end of the outer tube (1); The support component comprises a small support plate (3) and a large support plate (5) arranged between the outer tube (1) and the inner tube (2); at least two through holes for fixing the large support plate (5) are provided on the inner wall of the outer tube (1), and the outer tube (1) is fixedly connected to the large support plate (5); A plurality of the small support plates (3) are arranged on the inner wall of the outer tube (1), with each two small support plates (3) forming a group. Each group of the small support plates (3) is symmetrically arranged about the axis of the inner tube (2). The plurality of groups of the small support plates (3) are spaced apart and distributed on the inner wall of the outer tube (1). The small support plates (3) of two adjacent groups of the small support plates (3) located on the same side are staggered and arranged at a certain angle. The small support plates (3) are fixedly connected to the inner wall of the outer tube (1); The sealing plate (4) is an annular structure, and the sealing plate (4) is clamped between the inner wall of the outer tube (1) and the outer wall of the inner tube (2). Two sealing plates (4) are provided, and are respectively arranged at the two ends of the outer tube (1).

2. The powder coating spraying gun barrel with optimized structure according to claim 1 is characterized in that: The outer tube (1) and the inner tube (2) are hollow steel tubes.

3. The powder coating spraying gun barrel with optimized structure according to claim 2, characterized in that: The inner tube (2) is a seamless hollow steel tube.

4. The powder coating spraying gun barrel with optimized structure according to claim 1, characterized in that: The number of the through holes is 2-4.

5. The powder coating spraying gun barrel with optimized structure according to claim 1, characterized in that: The large support plate (5) is welded at the through hole.

6. The powder coating spraying gun barrel with optimized structure according to claim 1, characterized in that: The longitudinal ends of the small support plate (3) and the large support plate (5) in contact with the outer tube (1) are chamfered respectively.

7. The powder coating spraying gun barrel with optimized structure according to claim 1, characterized in that: The large support plate (5) and the small support plate (3) are connected to the outer wall of the inner tube (2) on a side away from the outer tube (1).

8. The powder coating spraying gun barrel with optimized structure according to claim 1, characterized in that: The large support plates (5) are distributed on both sides of the axis of the inner tube (2).

9. The powder coating spraying gun barrel with optimized structure according to claim 8, characterized in that: The large support plates (5) are staggered and distributed on both sides of the mass center of the outer tube (1).

10. The powder coating spraying gun barrel with optimized structure according to claim 1, characterized in that: Two groups of adjacent small support plates (3) are distributed on the outer wall of the inner tube (2) at an angle of 90°.

Images