An electrostatic liquid-infltration spray device

Abstract

The utility model discloses a kind of electrostatic spraying devices of permeating liquid, comprising: static electricity generation module;Static electrostatic spray gun and liquid feed pump, the static electrostatic spray gun is connected with the static electricity generation module one-to-one, the liquid feed pump is connected with the static electrostatic spray gun by coating pipeline, and the liquid feed pump is used to provide permeating liquid to the static electrostatic spray gun;Liquid supply module, containing liquid storage tank, the liquid storage tank is connected with the liquid feed pump;Spraying area, the spraying area bottom or side is equipped with inclined recovery groove, the static electrostatic spray gun is placed in the closed spraying area, for the permeating liquid collected is introduced into the liquid storage tank;Workpiece conveying positioning module, for conveying workpiece to the spraying area, workpiece conveying positioning module includes workpiece conveying device and rotating workbench;The utility model utilizes electrostatic adsorption effect, makes permeating liquid particle charged directional adsorption on the workpiece surface of ground, to reduce permeating liquid waste and promote coating uniformity.

Description

Technical Field

[0001] This utility model relates to the field of surface treatment technology, and in particular to a penetrating liquid electrostatic spraying device. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] Penetrant testing is a common non-destructive testing method widely used for detecting surface defects in workpieces made of materials such as metals, ceramics, and plastics. This method typically involves uniformly coating the workpiece surface with a penetrant, allowing it to penetrate into the defects, which are then revealed by a developer. Traditional penetrant coating methods include brushing, dipping, and ordinary spraying. These methods have the following drawbacks: low penetrant utilization rate; brushing and dipping easily lead to penetrant waste; and ordinary spraying, due to poor atomization, results in low penetrant adhesion, leading to a large amount of penetrant not being absorbed by the workpiece and thus wasting it. Furthermore, poor coating uniformity: brushing and dipping make it difficult to control coating thickness, and ordinary spraying easily results in uneven coating.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a penetrating liquid electrostatic spraying device to address the shortcomings of the existing technology.

[0006] This application discloses an electrostatic spraying apparatus for penetrants, comprising:

[0007] At least one electrostatic generator module is provided for generating high-voltage electrostatics;

[0008] The spraying execution module includes an electrostatic spray gun and a liquid supply pump. The electrostatic spray gun is connected to the electrostatic generation module in a one-to-one correspondence. The liquid supply pump is connected to the electrostatic spray gun through a paint pipeline and is used to supply penetrating liquid to the electrostatic spray gun.

[0009] A liquid supply module includes a liquid storage tank, which is connected to the liquid supply pump.

[0010] The spraying area is provided with an inclined recovery trough at the bottom or side. The electrostatic spray gun is placed in the closed spraying area to guide the collected permeate into the storage tank.

[0011] The workpiece conveying and positioning module is used to convey the workpiece to the spraying area. The workpiece conveying and positioning module includes a workpiece conveying device and a rotary table.

[0012] The control box is connected to each of the electrostatic generation modules and is used to control the electrostatic generation module, the spraying execution module, the liquid supply module, and the workpiece conveying and positioning module.

[0013] Furthermore, in the aforementioned electrostatic spraying device for penetrating liquid, the electrostatic generation module employs an electrostatic generator, which generates a high-voltage static electricity of 50kV-100kV.

[0014] Furthermore, in the aforementioned electrostatic spraying device for penetrating liquid, the liquid supply module further includes a return box, which is connected to the spraying area via a paint pipeline and is also connected to the liquid storage tank.

[0015] Furthermore, in the aforementioned electrostatic spraying device for penetrating liquid, the electrostatic spray gun employs an air-assisted atomizing nozzle.

[0016] Furthermore, in the aforementioned electrostatic spraying device for penetrating liquid, the distance between the electrostatic spray gun and the workpiece is between 15cm and 25cm.

[0017] Furthermore, in the aforementioned electrostatic spraying device for penetrating liquid, the control box includes:

[0018] The workpiece recognition module uses a vision sensor to detect the position, shape, and size of the workpiece in real time;

[0019] The dynamic adjustment module automatically adjusts the start / stop, angle, and flow rate of the electrostatic spray gun based on the detection results of the workpiece recognition module.

[0020] The closed-loop feedback control module has an optical sensor in the spraying area to monitor the thickness of the penetrating liquid coating on the workpiece surface in real time, and dynamically corrects the parameters of the electrostatic spray gun according to the coating thickness.

[0021] In summary, the structure adopted in this embodiment of the present invention has the following advantages:

[0022] The electrostatic spraying device for penetrating liquid described in this invention utilizes the electrostatic adsorption effect to cause penetrating liquid particles to become charged and directionally adsorb onto the grounded workpiece surface, thereby reducing penetrating liquid waste and improving coating uniformity, providing a reliable foundation for subsequent testing or processing. By optimizing spraying process parameters, improving equipment design, strengthening workpiece pretreatment, and introducing automated and intelligent control, the adhesion efficiency of the penetrating liquid is significantly improved, and waste is reduced. The effective utilization rate of the penetrating liquid can be increased to 70%-90%, while traditional spraying methods are typically below 50%. This reduces penetrating liquid consumption, lowers waste disposal costs, and is economical. Furthermore, by recycling and reusing "oversprayed" penetrating liquid, environmental pollution is reduced.

[0023] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the electrostatic spraying device for penetrant in an embodiment of this utility model.

[0026] The reference numerals in the above figures are as follows: 1. Electrostatic generator; 2. Electrostatic spray gun; 3. Liquid feed pump; 4. Paint pipeline; 5. Liquid storage tank; 6. Spraying area; 7. Workpiece conveying device; 8. Rotary worktable; 9. Workpiece; 10. Return box. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0029] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0030] Reference Figure 1 As shown in the figure, this application discloses an electrostatic spraying apparatus for penetrating liquid, comprising:

[0031] At least one electrostatic generator module is provided for generating high-voltage electrostatics;

[0032] The spraying execution module includes: an electrostatic spray gun 2 and a liquid supply pump 3. The electrostatic spray gun 2 is connected to the electrostatic generation module in a one-to-one correspondence. The liquid supply pump 3 is connected to the electrostatic spray gun 2 through a paint pipeline 4, and the liquid supply pump 3 is used to provide penetrating liquid to the electrostatic spray gun 2.

[0033] The liquid supply module includes a liquid storage tank 5, which is connected to the liquid supply pump 3.

[0034] Spraying area 6, the bottom or side of which is provided with an inclined recovery trough, the electrostatic spray gun 2 is placed in the sealed spraying area 6, and is used to introduce the collected permeate into the storage tank 5.

[0035] The workpiece conveying and positioning module is used to convey the workpiece 9 to the spraying area 6. The workpiece conveying and positioning module includes a workpiece conveying device 7 and a rotary table 8.

[0036] The control box is connected to each of the electrostatic generation modules and is used to control the electrostatic generation module, the spraying execution module, the liquid supply module, and the workpiece conveying and positioning module.

[0037] Specifically, in this embodiment, the electrostatic generation module uses an electrostatic generator 1, which generates a high-voltage electrostatic charge of 50kV-100kV. Too low a voltage will result in insufficient charge on the penetrant particles, weak adsorption, and easy loss due to gravity; too high a voltage may trigger a "rebound effect" (charged particles bounce off the workpiece), increasing overspray. The voltage needs to be stabilized at 50-80kV (within the normal range) based on the penetrant viscosity, workpiece material (e.g., metal, non-metal), and surface roughness to ensure efficient particle adsorption. The optimal operating voltage is determined through testing.

[0038] Specifically, in this embodiment, the liquid supply module further includes a return box 10, which is connected to the spraying area 6 via a paint pipeline 4, and is also connected to the liquid storage tank 5.

[0039] Specifically, in this embodiment, the electrostatic spray gun 2 uses an air-assisted atomizing nozzle. Excessive flow rate can lead to waste of surface-mounting and penetrating liquid on the workpiece; insufficient flow rate results in incomplete coverage, requiring secondary spraying. The atomization capability of the spray gun needs to be matched, such as by using an air-assisted atomizing nozzle to improve droplet uniformity.

[0040] Specifically, in this embodiment, the distance between the electrostatic spray gun 2 and the workpiece 9 is between 15cm and 25cm. If the distance between the spray gun and the workpiece surface is too far (>30cm), the loss of charged particles due to air dispersion increases; if it is too close (<10cm), it is easy to cause local liquid accumulation. It is recommended to adjust the distance to 15-25cm according to the workpiece size, and to ensure that the spray gun is perpendicular to the workpiece surface (or to adjust the angle according to the curved surface) by using a robotic arm or fixed bracket to reduce "missed spraying" or "overspraying".

[0041] Specifically, in this embodiment, the control box includes:

[0042] The workpiece recognition module uses a vision sensor to detect the position, shape, and size of the workpiece 9 in real time;

[0043] The dynamic adjustment module automatically adjusts the start / stop, angle, and flow rate of the electrostatic spray gun 2 based on the detection results of the workpiece recognition module.

[0044] The closed-loop feedback control module has an optical sensor in the spraying area 6 to monitor the thickness of the penetrating liquid coating on the surface of the workpiece 9 in real time, and dynamically correct the parameters of the electrostatic spray gun 2 according to the coating thickness.

[0045] With the above structure, the electrostatic generation module includes an electrostatic generator that generates 50-80kV high-voltage static electricity to charge the penetrant particles; the spraying execution module includes an electrostatic spray gun and a liquid supply pump. The electrostatic spray gun uses an air-assisted atomizing nozzle to atomize the penetrant into uniform droplets and assign a charge to the droplets. The liquid supply pump delivers the penetrant from the storage tank to the electrostatic spray gun. The workpiece conveying and positioning module uses a conveyor belt to transport the workpiece to the spraying area and ensures the workpiece passes stably through the spraying area; the liquid supply module includes a storage tank, a filter device, paint piping, and a return box. The storage tank is used to store the penetrant. The system consists of a liquid coating pipeline for transporting the penetrant, a filter for filtering impurities from the penetrant, and a return box for transferring the penetrant to a storage tank. The spraying area is enclosed to reduce the diffusion of penetrant droplets to the outside. An inclined recovery trough is installed at the bottom or side of the spraying area, and a filter screen (for filtering impurities and workpiece debris) guides the collected penetrant into the storage tank. The penetrant is then returned to the spray gun via the return box (the performance of the recovered penetrant needs to be tested periodically to ensure it does not affect the application effect). When using this electrostatic penetrant spraying device, the workpiece must first be pre-treated, including degreasing, rust removal, and drying, to ensure a clean surface. Then, the workpiece is placed on the workpiece conveying and positioning module and transported to the spraying area by a conveyor belt. The control box automatically adjusts the start / stop, angle, and flow rate of the electrostatic spray gun based on the detection results from the workpiece identification module. During spraying, any "oversprayed" penetrant is collected by the inclined recovery trough at the bottom of the enclosed spraying area, filtered by the filter, and then returned to the spray gun. After the spraying is completed, the control box determines whether the coating thickness meets the requirements based on the detection results of the closed-loop feedback control module. If the requirements are not met, a second spraying is performed. In addition, this device is equipped with two electrostatic spraying systems, which can be used in one standby mode or used simultaneously.

[0046] The electrostatic spraying device for penetrating liquid provided in this embodiment utilizes the electrostatic adsorption effect to cause penetrating liquid particles to become charged and directionally adsorb onto the grounded workpiece surface, thereby reducing penetrating liquid waste and improving coating uniformity, providing a reliable foundation for subsequent inspection or treatment. By optimizing spraying process parameters, improving equipment design, strengthening workpiece pretreatment, and introducing automated and intelligent control, the adhesion efficiency of the penetrating liquid is significantly improved, reducing waste. The effective utilization rate of the penetrating liquid can be increased to 70%-90%, while traditional spraying methods are typically below 50%. This reduces penetrating liquid consumption, lowers waste disposal costs, and is economical. Furthermore, by recycling and reusing "oversprayed" penetrating liquid, environmental pollution is reduced.

[0047] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0048] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0049] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A penetrating liquid electrostatic spraying device, characterized in that, include: At least one electrostatic generator module is provided for generating high-voltage electrostatics; The spraying execution module includes an electrostatic spray gun and a liquid supply pump. The electrostatic spray gun is connected to the electrostatic generation module in a one-to-one correspondence. The liquid supply pump is connected to the electrostatic spray gun through a paint pipeline and is used to supply penetrating liquid to the electrostatic spray gun. A liquid supply module includes a liquid storage tank, which is connected to the liquid supply pump. The spraying area is provided with an inclined recovery trough at the bottom or side. The electrostatic spray gun is placed in the closed spraying area to guide the collected permeate into the storage tank. The workpiece conveying and positioning module is used to convey the workpiece to the spraying area. The workpiece conveying and positioning module includes a workpiece conveying device and a rotary table. The control box is connected to each of the electrostatic generation modules and is used to control the electrostatic generation module, the spraying execution module, the liquid supply module, and the workpiece conveying and positioning module.

2. The electrostatic spraying apparatus for penetrating liquid according to claim 1, characterized in that, The electrostatic generation module uses an electrostatic generator, which generates high-voltage electrostatics of 50kV-100kV.

3. The electrostatic spraying apparatus for penetrating liquid according to claim 1, characterized in that, The liquid supply module also includes a return box, which is connected to the spraying area via a paint pipeline and is also connected to the liquid storage tank.

4. The electrostatic spraying apparatus for penetrating liquid according to claim 1, characterized in that, The electrostatic spray gun uses an air-assisted atomizing nozzle.

5. The electrostatic spraying apparatus for penetrating liquid according to claim 1, characterized in that, The distance between the electrostatic spray gun and the workpiece is between 15cm and 25cm.

6. The electrostatic spraying apparatus for penetrating liquid according to claim 1, characterized in that, The control box includes: The workpiece recognition module uses a vision sensor to detect the position, shape, and size of the workpiece in real time; The dynamic adjustment module automatically adjusts the start / stop, angle, and flow rate of the electrostatic spray gun based on the detection results of the workpiece recognition module. The closed-loop feedback control module has an optical sensor in the spraying area to monitor the thickness of the penetrating liquid coating on the workpiece surface in real time, and dynamically corrects the parameters of the electrostatic spray gun according to the coating thickness.

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