Spraying device capable of freely rotating by 360 degrees and used for deep-layer tube bundle of boiler

Abstract

The utility model relates to a spraying device capable of freely rotating by 360 degrees for a boiler deep-layer tube bundle, and belongs to the technical field of spraying of boiler deep-layer tube bundles in a power plant. Comprising sleeves and bearings; an annular step is arranged in the sleeve and used for supporting the bearing, a gasket is placed on the outer ring of the bearing, and a lead screw is arranged on the inner ring of the bearing. A bolt connector is arranged at the tail end of the sleeve; and a spraying nozzle is arranged at the front end of the sleeve. The coating and the high-pressure gas enter the spraying nozzle through a bolt connector gas channel; under the action of high-pressure gas, the coating is sprayed out at a high speed through three-angle vent holes, so that the spraying nozzle rotates anticlockwise by 360 degrees at a high speed; and all-directional and omission-free spraying covering is carried out on the surface of the workpiece in the area, and a spraying blind area is effectively eradicated, so that the high uniformity and consistency of the coating on the surface of the workpiece after spraying are realized.

Description

Technical Field

[0001] This utility model relates to a spraying device for deep tube banks of boilers that can rotate freely 360 degrees, belonging to the field of spraying technology for deep tube banks of power plant boilers. Background Technology

[0002] Spray coating technology primarily utilizes equipment such as spray guns or disc atomizers to disperse paint into uniform and fine droplets through pressure or centrifugal force, which are then applied to the surface of the object to be coated. During this process, factors such as paint uniformity, droplet size, and application space directly affect the final coating quality. However, the internal environment of a boiler is complex, especially in the deep tube bank area, where space is narrow and difficult to access. This limits the selection of spray coating equipment and operating space, making the spray coating process challenging.

[0003] Existing spraying processes present several problems when performing deep tube spraying on power plant boilers, as follows:

[0004] I. When performing spraying operations in confined spaces such as deep tube banks of power plant boilers, traditional spraying methods are often limited by space constraints, lacking sufficient flexibility and convenience, posing significant challenges and inconvenience to operators. Therefore, operators need to adopt more refined and innovative technical methods to address this spraying difficulty.

[0005] Second, when carrying out spraying operations in confined spaces such as deep tube banks of power plant boilers, due to the extremely limited space, if traditional spray nozzles are used, spraying blind spots will inevitably be formed, resulting in some areas not being adequately covered by the spray, which in turn causes uneven spraying effect on the workpiece surface, potentially damaging the final processing quality and the appearance and performance of the workpiece. Summary of the Invention

[0006] The purpose of this utility model is to provide a spraying device that can rotate freely 360 degrees for deep tube banks of boilers, which greatly simplifies operation and significantly improves spraying efficiency. It can ensure that the surface of deep tube banks of boilers is fully covered without any omissions, effectively eliminating blind spots in spraying, thereby achieving a high degree of uniformity and consistency of the coating on the surface of deep tube banks of boilers after spraying.

[0007] To achieve the above objectives, this utility model adopts the following technical solution:

[0008] A spraying device for deep tube banks of boilers that can rotate freely 360 degrees, comprising a sleeve and bearings;

[0009] The sleeve has an annular step inside to support the bearing, a shim is placed on the outer ring of the bearing, and a lead screw is provided on the inner ring of the bearing.

[0010] A bolt connector is provided at the tail end of the sleeve;

[0011] A spray nozzle is provided at the front end of the sleeve.

[0012] Furthermore, the height of the shim extends beyond the edge of the lead screw.

[0013] Furthermore, the spray nozzle is evenly provided with three ventilation holes.

[0014] Furthermore, the spray nozzle is used to store paint and high-pressure gas, which enter the interior of the spray nozzle through the gas passage of the bolted connector.

[0015] An annular step is designed inside the sleeve to support the bearing, and a shim is placed on the outer ring of the bearing, while a lead screw is placed on the inner ring. The height of the shim is designed to extend beyond the edge of the lead screw to facilitate its smooth rotation. The nozzle and lead screw, as well as the sleeve and bolt connection, are all securely assembled using threaded connections. All parts are assembled into a single spraying device using these methods.

[0016] Under the action of high-pressure gas, the coating is sprayed out at high speed through three vent holes at different angles, driving the spray nozzle to rotate 360° counterclockwise at high speed, so as to achieve all-round and complete spraying coverage of the deep tube bank surface of the boiler.

[0017] The working process and effect of this utility model are as follows: the paint and high-pressure gas enter the spray nozzle through the air channel of the bolt connection head; under the action of high-pressure gas, the paint is sprayed out at high speed through three angle air holes, causing the spray nozzle to rotate counterclockwise 360° at high speed; the surface of the workpiece in this area is fully and without omissions by spraying, effectively eliminating blind spots in spraying, thereby achieving a high degree of uniformity and consistency of the paint on the surface of the workpiece after spraying. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the ventilation hole in the spray nozzle of this utility model. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0023] The present invention will now be described in detail with reference to the accompanying drawings:

[0024] A spraying device for deep tube banks of boilers that can rotate freely 360 degrees, comprising a sleeve 1 and a bearing 2;

[0025] The sleeve 1 has an annular step inside to support the bearing 2. A shim is placed on the outer ring of the bearing 2, and a lead screw 4 is provided on the inner ring of the bearing 2.

[0026] A bolt head 5 is provided at the tail end of the sleeve 1;

[0027] A spray nozzle 6 is provided at the front end of the sleeve 1.

[0028] Furthermore, the height of the gasket 2 extends beyond the edge of the lead screw 4.

[0029] Furthermore, the spray nozzle 6 is provided with three vent holes 7 evenly distributed on it.

[0030] Furthermore, the spray nozzle 6 is used to store paint and high-pressure gas, which enter the interior of the spray nozzle 6 through the air passage of the bolted connector 5.

[0031] Implementation process:

[0032] The bearing 2, gasket 3, and lead screw 4 are placed into the sleeve 1 in sequence, and the bolt connector 5 is securely assembled with the sleeve 1 and the spray nozzle 6 is securely assembled with the lead screw 4 through the threaded connection structure. All the above parts are assembled into a whole spraying device.

[0033] At the start of sandblasting, the coating and high-pressure gas enter the spray nozzle 6 through the air passage of the bolt connector 5. Under the action of the high-pressure gas, the coating is sprayed out at high speed through three special angle air holes 7, causing the sandblasting head to rotate 360° counterclockwise at high speed. This ensures that the surface of the deep tube bank of the boiler is fully and completely covered by the coating, effectively eliminating blind spots in the coating process. This results in a high degree of uniformity and consistency of the slurry on the surface of the deep tube bank of the boiler after the coating is applied.

[0034] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spray device for 360 degree free rotation of a deep tube bank of a boiler, characterized in that: It includes sleeve (1) and bearing (2); The sleeve (1) is internally provided with an annular step for supporting the bearing (2), a gasket is placed on the outer ring of the bearing (2), and a lead screw (4) is arranged on the inner ring of the bearing (2); A bolt connection head (5) is arranged at the tail end of the sleeve (1); A spraying nozzle (6) is arranged at the front end of the sleeve (1).

2. A 360 degree free rotating spray device for deep tube bank of boiler as claimed in claim 1 wherein: The height of the gasket (3) exceeds the edge of the lead screw (4).

3. A 360 degree free rotating spray device for deep tube bank of boiler as claimed in claim 1 wherein: Three air holes (7) are uniformly arranged on the spraying nozzle (6).

4. A 360 degree free swivel spray device for deep tube bank of a boiler as claimed in claim 1, wherein: The spraying nozzle (6) is used for storing paint and high-pressure gas, and the paint and high-pressure gas enter the inside of the spraying nozzle (6) through the air channel of the bolt connection head (5).

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