Rotary sliding arc discharge plasma torch structure

Abstract

The utility model discloses a rotary sliding arc discharge plasma torch structure, and relates to the field of torches. The rotating sliding arc discharge plasma torch structure comprises an outer electrode, the interior of the outer electrode is designed to be hollow, an insulating sleeve is fixedly connected into an inner cavity of the outer electrode, a swirler is fixedly connected into the insulating sleeve, a central electrode is fixedly connected to the swirler, and an additional air pipe is fixedly connected into an inner cavity of the central electrode. According to the rotating sliding arc discharge plasma torch structure, the central electrode is arranged to be hollow, working airflow passes through the additional air pipe and firstly flows through the inner wall of the hollow central electrode to dissipate heat of the central electrode, the heat dissipation condition of the central electrode is effectively improved, and the temperature of the central electrode is reduced to be below 200 DEG C under the same actual measurement working condition; the loss speed of the central electrode is obviously reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of spray guns, in particular to a rotating sliding arc discharge plasma spray gun structure. Background Art

[0002] In the rotary arc discharge plasma spray guns currently used for surface treatment on the market, the central metal electrode is cooled only by the airflow flowing through the electrode surface. The measured temperature of the central metal electrode during operation is relatively high, reaching more than 360°. The high temperature aggravates the ablation and peeling at the arc root of the central metal electrode, resulting in excessive loss of the central metal electrode, affecting production efficiency. In view of the shortcomings of the prior art, the utility model provides a rotary arc discharge plasma spray gun structure to solve the above problems. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the shortcomings of the prior art, the utility model provides a rotating sliding arc discharge plasma spray gun structure, in which the center electrode is set to be hollow, so that the working gas flows through the additional gas pipe, first flows through the inner wall of the hollow center electrode, and dissipates the heat of the center electrode, thereby effectively improving the heat dissipation condition of the center electrode. It is measured that under the same working conditions, the temperature of the center electrode drops to below 200°, and the loss rate of the center electrode is significantly reduced.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a rotating arc discharge plasma spray gun structure, including an outer electrode, the interior of the outer electrode is designed to be hollow, an insulating sleeve is fixedly connected to the inner cavity of the outer electrode, a cyclone is fixedly connected to the interior of the insulating sleeve, a central electrode is fixedly connected to the cyclone, and an additional air pipe is fixedly connected to the inner cavity of the central electrode.

[0007] Preferably, the outer electrode and the central electrode are connected to the positive and negative electrodes of the high voltage power supply through wires, respectively.

[0008] Preferably, a nozzle is provided on the outer electrode.

[0009] Preferably, when the high voltage power supply is powered on, a discharge arc is generated at the nozzle position between the outer electrode and the center electrode.

[0010] Preferably, the cyclone is provided with a plurality of groups of air flow holes.

[0011] The utility model discloses a rotating sliding arc discharge plasma spray gun structure, which has the following beneficial effects:

[0012] The rotating arc discharge plasma spray gun structure sets the center electrode to be hollow, so that the working gas flows through the additional gas pipe and first flows through the inner wall of the hollow center electrode to dissipate heat for the center electrode, thereby effectively improving the heat dissipation conditions of the center electrode. Under the same working conditions, it is measured that the center electrode temperature drops below 200°, and the center electrode wear rate is significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] In the figure: 1, outer electrode; 101, nozzle; 2, insulating sleeve; 3, cyclone; 4, center electrode; 5, additional air pipe; 6, discharge arc. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The embodiment of the present application provides a rotating arc discharge plasma spray gun structure, which solves the problem of rotating arc discharge plasma spray guns for surface treatment currently on the market, in which the central metal electrode is cooled only by the airflow flowing through the electrode surface. The measured temperature of the central metal electrode during operation is relatively high, reaching more than 360°. The high temperature aggravates the ablation and peeling at the arc root of the central metal electrode, resulting in excessive loss of the central metal electrode, affecting production efficiency.

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] The utility model embodiment discloses a rotating sliding arc discharge plasma spray gun structure, according to the attached Figure 1As shown, it includes an outer electrode 1, the interior of the outer electrode 1 is hollow, an insulating sleeve 2 is fixedly connected to the inner cavity of the outer electrode 1, a cyclone 3 is fixedly connected to the inner part of the insulating sleeve 2, a central electrode 4 is fixedly connected to the cyclone 3, and an additional air pipe 5 is fixedly connected to the inner cavity of the central electrode 4.

[0020] Furthermore, the outer electrode 1 and the center electrode 4 are respectively connected to the positive and negative poles of the high-voltage power supply through wires. The set high-voltage power supply facilitates the application of voltage between the outer electrode 1 and the center electrode 4, thereby generating an arc to ignite the working gas when it runs between the outer electrode 1 and the center electrode 4.

[0021] Furthermore, a nozzle 101 is provided on the outer electrode 1, and the nozzle 101 is provided to spray and burn the working gas.

[0022] Specifically, when the high-voltage power supply is energized, a discharge arc 6 is generated at the nozzle 101 position between the outer electrode 1 and the center electrode 4. The discharge arc 6 generated at the nozzle 101 position between the outer electrode 1 and the center electrode 4 is used to ignite the ejected working gas, thereby facilitating the use of the spray gun for surface processing of the workpiece.

[0023] Furthermore, the cyclone 3 is provided with a plurality of groups of air flow holes, and the plurality of groups of air flow holes provided on the cyclone 3 facilitates the flow of the high-pressure working gas, thereby cooling both the inside and the outside of the center electrode 4 and reducing the temperature of the center electrode 4 .

[0024] The rotating arc discharge plasma spray gun structure sets the center electrode 4 to be hollow, so that the working gas flows through the additional gas pipe 5, first flows through the inner wall of the hollow center electrode 4, and dissipates the heat of the center electrode 4, which effectively improves the heat dissipation condition of the center electrode 4. Under the same working conditions, the temperature of the center electrode 4 drops to below 200°, and the wear rate of the center electrode 4 is significantly reduced.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A rotating arc discharge plasma spray gun structure, comprising an outer electrode (1), characterized in that: The interior of the outer electrode (1) is designed to be hollow, an insulating sleeve (2) is fixedly connected to the inner cavity of the outer electrode (1), a cyclone (3) is fixedly connected to the inner cavity of the insulating sleeve (2), a central electrode (4) is fixedly connected to the cyclone (3), and an additional air pipe (5) is fixedly connected to the inner cavity of the central electrode (4).

2. The rotating arc discharge plasma spray gun structure according to claim 1, characterized in that: The outer electrode (1) and the central electrode (4) are respectively connected to the positive and negative electrodes of a high-voltage power supply via wires.

3. The rotating arc discharge plasma spray gun structure according to claim 2, characterized in that: The outer electrode (1) is provided with a nozzle (101).

4. The rotating arc discharge plasma spray gun structure according to claim 3, characterized in that: When the high-voltage power supply is powered on, a discharge arc (6) is generated at the nozzle (101) between the outer electrode (1) and the center electrode (4).

5. The rotating arc discharge plasma spray gun structure according to claim 1, characterized in that: The cyclone (3) is provided with a plurality of groups of air flow holes.

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