A jetting device for electrophoresis of hollow structural components

Abstract

This application discloses a spraying device for electrophoresis of hollow structural parts, relating to the field of compressor processing technology. It improves upon existing electrophoretic coating processes for hollow workpieces such as compressors, where the coating film cannot be deposited due to bottom air chamber obstruction. The device includes an electrophoresis tank, a circulating pump, a delivery pipeline connected to the outlet of the circulating pump, and several nozzles located at the end of the delivery pipeline. The spraying direction of the nozzles is directed towards the sealed air chamber area formed at the bottom of the workpiece immersed in the electrophoresis tank. This application efficiently and reliably breaks through the air barrier within the workpiece's air chamber, fundamentally solving the problem of coating loss in the bottom electrophoresis blind zone of hollow workpieces such as compressors, and improving the coating integrity and corrosion protection quality of the product.

Description

Technical Field

[0001] This application relates to the field of compressor processing technology, and in particular to a spraying device for electrophoresis of hollow structural components. Background Technology

[0002] In the surface treatment of metal workpieces, electrophoretic coating is widely used due to its uniform coating and good corrosion resistance. However, for workpieces with hollow support bases, such as compressors, a sealed air chamber forms at the bottom when slowly immersed in the electrophoresis tank. As the workpiece moves forward, the air in this chamber cannot escape smoothly. Consequently, during the subsequent electrophoresis process, the insulating barrier of the air prevents the bath solution from contacting the metal surface enclosed by the air chamber, resulting in the inability to deposit a coating film in that area. After the drying process, this area becomes a noticeable coating defect.

[0003] To address this quality defect, traditional production processes have had to rely on subsequent manual touch-up painting. This not only increases additional labor costs and material waste, but also results in inconsistent paint quality, potentially affecting the overall corrosion resistance and appearance consistency of the product, thus becoming a bottleneck restricting production efficiency and product quality improvement.

[0004] Therefore, there is an urgent need for a spraying device for electrophoresis of hollow structural components, which can effectively break the air chamber at the bottom of the compressor and ensure the integrity of the electrophoretic coating through an online treatment method, thereby eliminating the need for manual paint touch-up and achieving cost reduction, efficiency improvement, and quality enhancement. Utility Model Content

[0005] In order to improve the problem that the paint film cannot be deposited due to the obstruction of the bottom air chamber during the electrophoretic coating process of hollow workpieces such as compressors, this application provides a spraying device for electrophoresis of hollow structural parts.

[0006] This application provides a spraying device for electrophoresis of hollow structural components, employing the following technical solution:

[0007] A spraying device for electrophoresis of hollow structural components includes an electrophoresis tank, a circulation pump, a delivery pipeline connected to the outlet of the circulation pump, and a plurality of nozzles disposed at the end of the delivery pipeline; the spraying direction of the nozzles is directed toward the sealed air chamber region formed at the bottom of the workpiece immersed in the electrophoresis tank.

[0008] Preferably, the nozzle has a flat fan-shaped or solid cone-shaped structure.

[0009] Preferably, the circulation pump is a dedicated pump that is set up independently of the main circulation system of the electrophoresis tank.

[0010] Preferably, the delivery pipeline is equipped with a control valve for adjusting the flow rate and pressure.

[0011] Preferably, the nozzles are arranged at intervals along the workpiece's forward direction and are respectively aimed at the bottom of workpieces of different specifications.

[0012] Preferably, it also includes a universal joint bracket for nozzle mounting, the bracket being disposed at the bottom or side wall of the electrophoresis tank.

[0013] In summary, this application includes at least one of the following beneficial effects:

[0014] 1. This application, by setting up an independent circulating pump and nozzle, directly and centrally sprays the bath liquid onto the sealed air chamber area formed at the bottom of the workpiece. This can efficiently and reliably break the air barrier in the air chamber, ensuring that the metal surface in this area is in full contact with the bath liquid. This fundamentally solves the problem of coating loss in the electrophoretic blind area at the bottom of hollow workpieces such as compressors, and significantly improves the coating integrity and corrosion protection quality of the product.

[0015] 2. This application also realizes automated air chamber processing, replacing the traditional repair method that relies on manual paint touch-up. This not only eliminates problems such as unstable quality and color difference caused by manual paint touch-up, but also saves labor costs and material losses, effectively improving production efficiency and product first-pass yield, and achieving cost reduction and efficiency improvement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the spraying device in this embodiment of the application.

[0017] Explanation of reference numerals in the attached drawings: 1. Electrophoresis tank; 2. Circulation pump; 3. Delivery pipeline; 4. Nozzle; 5. Universal joint bracket; 6. Conveyor. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] In addition, the term "multiple" should mean two or more.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] This application discloses a spraying device for electrophoresis of hollow structural components, comprising an electrophoresis tank 1, a circulating pump 2, a conveying pipeline 3 connected to the outlet of the circulating pump 2, and a plurality of nozzles 4 located at the end of the conveying pipeline. The spraying direction of the nozzles 4 is directed towards the sealed air chamber area formed at the bottom of the workpiece immersed in the electrophoresis tank 1. It is mainly used to solve the technical problem that in workpieces with hollow support bases, such as compressors, a sealed air chamber forms at the bottom during electrophoresis, preventing paint film deposition.

[0025] Specifically, the circulating pump 2 is a dedicated pump that is independent of the original main circulation system of the electrophoresis tank 1. It can provide high flow and high pressure jet power independently according to the actual needs of the gas chamber, without being limited by the flow and pressure of the main circulation system, thus ensuring the strong and stable jet effect.

[0026] Furthermore, the circulation pipeline is made of corrosion-resistant insulating materials (such as UPVC, CPVC, or stainless steel) to ensure long-term stable operation of the device in the electrophoresis tank 1 and to guarantee safety. One end of the circulation pipeline is connected to the outlet of the circulation pump 2, and the other end extends to a predetermined position inside the electrophoresis tank 1. A control valve is also installed on the delivery pipeline 3. The control valve is used to precisely regulate the flow rate and pressure of the tank liquid flowing to the nozzle 4, thereby achieving fine-tuning of the spraying effect.

[0027] Furthermore, nozzle 4 is selected as a mixed-flow nozzle 4, employing a flat fan-shaped or solid cone-shaped structure. When nozzle 4 adopts a flat fan-shaped structure, it generates a wide, blade-like high-speed liquid flow fan, effectively "cutting" into and "scraping away" the air film adhering to the inner surface of the workpiece's bottom support. When nozzle 4 adopts a solid cone-shaped structure, it generates a full, high-impact cone-shaped jet region, powerfully agitating and filling the air chamber.

[0028] Furthermore, the spray direction of nozzle 4 is precisely adjusted and fixed to be directly opposite the sealed air chamber area formed by the bottom support of the compressor immersed in the electrophoresis tank 1. To achieve and maintain the precise spray angle of nozzle 4, the device is also equipped with a universal joint bracket 5 for mounting nozzle 4. The universal joint bracket 5 is fixedly mounted on the side wall (or bottom) of the electrophoresis tank 1, and nozzle 4 is mounted on the universal joint bracket 5. By adjusting the universal joint, the up-down, left-right, and pitch angles of nozzle 4 can be easily adjusted in three-dimensional space, ensuring that its spray centerline is accurately aligned with the air chamber at the continuously moving bottom of the working surface, greatly improving the installation flexibility and adaptability of the device to changes in the production line.

[0029] A spraying device for electrophoresis of hollow structural components operates on the following principle:

[0030] After the electrophoresis production line is started, the compressor is slowly immersed in and moves forward in the electrophoresis tank 1 via the conveyor 6. At this time, the independent circulation pump 2 is started, and the liquid in the electrophoresis tank 1 is pumped into the delivery pipeline 3. After being regulated by the control valve, it is finally sprayed continuously onto the bottom support of the compressor through the precisely positioned nozzle 4 at a high flow rate and high pressure.

[0031] The high-speed jet directly impacts and enters the sealed air chamber formed by the support base. The kinetic energy of the jet effectively "blows away" and "expels" the air trapped in the air chamber, and instantly fills the area with the liquid, so that the metal surface that was originally blocked by air can be completely exposed in the liquid.

[0032] When the workpiece (compressor) moves into the electrophoresis energizing zone, the gas chamber is already filled with the bath liquid, allowing current to flow smoothly through the bath liquid and form a circuit between the workpiece (anode) and the electrode (cathode), thus uniformly depositing a paint film on the original "electrophoresis dead zone." After the subsequent baking process, the workpiece obtains a complete, dense coating with excellent corrosion resistance, completely eliminating coating defects in that area.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A spraying device for electrophoresis of hollow structural components, comprising an electrophoresis tank (1), characterized in that: It also includes a circulation pump (2), a conveying pipeline (3) connected to the outlet of the circulation pump (2), and several nozzles (4) set at the end of the conveying management; the spraying direction of the nozzles (4) is set to the sealed air chamber area formed at the bottom of the workpiece immersed in the electrophoresis tank (1).

2. The spraying device for electrophoresis of hollow structural components according to claim 1, characterized in that: The nozzle (4) adopts a flat fan-shaped or solid cone-shaped structure.

3. The spraying device for electrophoresis of hollow structural components according to claim 1, characterized in that: The circulation pump (2) is a dedicated pump set up independently of the main circulation system of the electrophoresis tank (1).

4. The spraying device for electrophoresis of hollow structural components according to claim 3, characterized in that: The delivery pipeline (3) is equipped with a control valve for adjusting the flow rate and pressure.

5. The spraying device for electrophoresis of hollow structural components according to claim 1, characterized in that: The nozzles (4) are arranged at intervals along the workpiece's forward direction and are respectively aimed at the bottom of workpieces of different specifications.

6. The spraying device for electrophoresis of hollow structural components according to claim 1, characterized in that: It also includes a universal joint bracket (5) for mounting the nozzle (4), the bracket being disposed at the bottom or side wall of the electrophoresis tank (1).

Images