Electrode structure of atmospheric pressure jet plasma spray gun

Abstract

This invention proposes an electrode structure for an atmospheric pressure jet plasma spray gun, comprising an inner electrode and an outer electrode. The inner electrode includes an electrode body with a detachable inner high-temperature resistant end at its discharge end. The outer electrode includes a nozzle body with a jet channel within it. A detachable outer high-temperature resistant block with an outlet hole communicating with the jet channel is located at the outlet end of the jet channel. This invention, through the inclusion of the inner high-temperature resistant end and the outer high-temperature resistant block, fundamentally blocks the source of metal atom contamination, while significantly slowing down the electrode ablation rate and extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of plasma spray gun technology, and in particular to an electrode structure for an atmospheric pressure jet plasma spray gun. Background Technology

[0002] Atmospheric pressure jet plasma spray gun is a core piece of equipment for industrial surface treatment (such as FPC flexible board cleaning, 3C product pre-dispensing activation, etc.). Its working principle is as follows: a high-frequency high-voltage electric field is constructed through internal and external electrodes to ionize the gas (such as air, nitrogen, etc.) flowing through the spray gun, generating a highly active plasma jet, which ultimately acts on the material surface to achieve cleaning, modification and other effects.

[0003] However, existing spray guns have two major drawbacks: 1. Metal atom contamination problem: During the discharge process, metal atoms (such as copper ions, iron ions, etc.) will be released from the inner and outer electrodes (commonly made of copper, stainless steel, etc.) due to high temperature ionization. These metal atoms are easy to adhere to the surface of the material being treated, resulting in surface contamination and coverage of active sites, which directly reduces the effect of plasma treatment. 2. Electrode erosion and short lifespan: The continuous precipitation of metal atoms is essentially an ablation process of the electrode material. Especially in the high-temperature environment of high-frequency high-voltage discharge, the electrode will be rapidly worn down due to metal melting and evaporation, which will lead to the destruction of the integrity of the spray gun structure, the decrease in the stability of the plasma jet, and ultimately shorten the service life of the spray gun. Utility Model Content

[0004] This invention proposes an electrode structure for an atmospheric pressure jet plasma spray gun. By setting an inner high-temperature resistant end and an outer high-temperature resistant block, the source of metal atom contamination is fundamentally blocked, while the electrode ablation rate is significantly slowed down, extending its service life.

[0005] The technical solution of this utility model is implemented as follows: an electrode structure for an atmospheric pressure jet plasma spray gun includes an inner electrode and an outer electrode. The inner electrode includes an electrode body, and the discharge end of the electrode body is provided with a detachable inner high-temperature resistant end. The outer electrode includes a nozzle body, and a jet channel is provided inside the nozzle body. A detachable outer high-temperature resistant block is provided at the outlet end of the jet channel. An outlet hole is provided on the outer high-temperature resistant block, and the outlet hole communicates with the jet channel.

[0006] Furthermore, the inner high-temperature resistant end is an inner tungsten end, an inner titanium end, or an inner titanium-tungsten end.

[0007] Furthermore, the outer high-temperature resistant block is an outer tungsten block, an outer titanium end, or an outer titanium-tungsten end.

[0008] Furthermore, the outer high-temperature resistant block is threadedly connected to the outlet end of the jet channel.

[0009] Furthermore, a polygonal groove is provided at the end of the outer high-temperature resistant block that is away from the inner electrode.

[0010] Furthermore, the electrode body is connected to the internal high-temperature resistant end thread.

[0011] Furthermore, the electrode body is a copper electrode body or a stainless steel electrode body.

[0012] Furthermore, the nozzle body is either a copper nozzle body or a stainless steel nozzle body.

[0013] The beneficial effects of this utility model are: This invention features a detachable inner high-temperature resistant end, making it difficult for metal atoms in the discharge area to be ionized and stripped away at high temperatures. A detachable outer high-temperature resistant block is provided at the nozzle's jet channel outlet end, which can resist high-speed plasma scouring and high-temperature erosion, fundamentally blocking the source of metal atom contamination. At the same time, it significantly slows down the electrode ablation rate and extends its service life. Moreover, all of the above structures are detachable, facilitating subsequent replacement. The use of high-temperature resistant materials only in the core area of ​​the spray gun electrode structure also helps control the cost of the electrode structure.

[0014] The electrode structure of this novel atmospheric pressure jet plasma spray gun is adapted to high-precision industrial scenarios, especially suitable for scenarios with extremely high requirements for surface cleanliness and processing consistency, such as FPC flexible circuit precision circuit cleaning and 3C mobile terminal pre-dispensing activation, helping industrial manufacturing upgrade towards high precision and high reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 Three-dimensional electrode structure Figure 1 ; Figure 2 Three-dimensional electrode structure Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the electrode structure.

[0017] Electrode body 1, inner high-temperature resistant end 2, nozzle body 3, jet channel 4, outer high-temperature resistant block 5, outlet hole 6, polygonal groove 7. Detailed Implementation

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

[0019] like Figure 1-3 As shown, an electrode structure for an atmospheric pressure jet plasma spray gun includes an inner electrode and an outer electrode. The inner electrode includes an electrode body 1, which is a copper electrode body 1 or a stainless steel electrode body 1. The discharge end of the electrode body 1 is provided with a detachable inner high-temperature resistant end 2. The electrode body 1 is threadedly connected to the inner high-temperature resistant end 2, which is an inner tungsten end, an inner titanium end, or an inner titanium-tungsten end.

[0020] The external electrode includes a nozzle body 3, which is a copper nozzle body 3 or a stainless steel nozzle body 3. A jet channel 4 is provided inside the nozzle body 3. A detachable external high-temperature resistant block 5 is provided at the outlet end of the jet channel 4. The external high-temperature resistant block 5 is an external tungsten block, an external titanium end, or an external titanium-tungsten end.

[0021] High-melting-point high-temperature resistant conductor materials such as tungsten, titanium, and tungsten-titanium alloys have significantly higher melting points (e.g., tungsten has a melting point of 3422℃, and titanium has a melting point of 1668℃) and stable chemical properties, which can effectively suppress the precipitation of metal atoms in high-temperature discharge environments.

[0022] The outer high-temperature resistant block 5 is provided with an outlet hole 6, which communicates with the jet channel 4. The plasma jet is ejected through the jet channel 4 and the outlet hole 6. The outer high-temperature resistant block 5 is threadedly connected to the outlet end of the jet channel 4. A polygonal groove 7 is provided at the end of the outer high-temperature resistant block 5 away from the inner electrode, through which the outer high-temperature block is installed and removed.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrode structure for an atmospheric pressure effervescent plasma torch comprising an inner electrode and an outer electrode, characterized in that: The inner electrode includes an electrode body, and the discharge end of the electrode body is provided with a detachable inner high-temperature resistant end. The outer electrode includes a nozzle body, and the nozzle body is provided with a jet channel. The outlet end of the jet channel is provided with a detachable outer high-temperature resistant block, and the outer high-temperature resistant block is provided with an outlet hole that communicates with the jet channel.

2. The electrode structure of an atmospheric pressure jet plasma torch according to claim 1, characterized in that: The inner high-temperature resistant end is an inner tungsten end, an inner titanium end, or an inner titanium-tungsten end.

3. The electrode structure of an atmospheric pressure jet plasma torch according to claim 1, wherein: The outer high-temperature resistant block is an outer tungsten block, an outer titanium end, or an outer titanium-tungsten end.

4. The electrode structure of a normal pressure jet plasma gun according to claim 1, characterized in that: The external high-temperature resistant block is threadedly connected to the outlet end of the jet channel.

5. An electrode structure for an atmospheric pressure fluidized plasma torch according to claim 4, wherein: A polygonal groove is provided at the end of the outer high-temperature resistant block that is away from the inner electrode.

6. The electrode structure of a normal-pressure fluidized plasma torch according to claim 1, characterized in that: The electrode body is connected to the internal high-temperature resistant end thread.

7. The electrode structure of a normal-pressure fluidized plasma torch according to claim 1, characterized in that: The electrode body is either a copper electrode body or a stainless steel electrode body.

8. The electrode structure of a normal-pressure fluidized plasma torch according to claim 1, characterized in that: The nozzle body is made of copper or stainless steel.

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