Low-power-consumption single-anode plasma generator

Abstract

The utility model relates to the technical field of plasma generators, in particular to a low-power-consumption single-anode plasma generator, which comprises an anode seat used for mounting an anode head and limiting the anode head; the cathode seat is mounted on the anode seat and is used for mounting and limiting the cathode head; the gas path is arranged on the cathode seat and the anode seat so as to communicate an external gas source with the arc discharge cavity; the cooling pipeline comprises a main water inlet pipe and a main water return pipe which are arranged at the end part of the cathode seat, the main water inlet pipe and the main water return pipe are connected through two cooling lines which are connected in parallel, one cooling line is used for cooling the anode head, and the other cooling line is used for cooling the cathode head; according to the gas circuit, a primary pressure stabilizing chamber and a secondary pressure stabilizing chamber are arranged on a channel between an external gas source and an arc discharge cavity in series. The gas circuit is used for solving the technical problems that in the prior art, a plasma generator is high in power consumption and not ideal in cooling effect due to poor wind pressure stability, and the service life is affected due to the fact that an anode is prone to being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plasma generator especially a low -power single anode's plasma generator. BACKGROUND

[0002] The description in this section is provided only for the purpose of summarizing the background of the disclosure and does not constitute prior art.

[0003] The plasma burner is different from the traditional pulverized coal burner, which ignites the pulverized coal by using the high-temperature plasma generated by the plasma generator. Mainly, it uses high-frequency triggering to start the arc, generates direct-current air arc plasma under high pressure, rapidly releases volatile matter under the action of high temperature generated by the plasma generator, breaks and crushes the particles, and thus rapidly burns. The conventional plasma generator includes an anode head connected to an anode electrode and a cathode head connected to a cathode electrode, respectively, and a gas path passing through the arc drawing cavity between the cathode head and the anode head and a cooling pipeline for cooling the cathode head and the anode head.

[0004] The prior art discloses a wind-cooled composite electrode plasma generator, and the utility model discloses the principle is that the plasma generated by the high-frequency low-power plasma generator is used as the virtual cathode of the high-power plasma generator, and the hollow cathode principle is adopted to replace the traditional point-line type emission with a cylindrical surface as the plasma emission point, which improves the total emission power but reduces the emission power per unit area, reduces the temperature of the plasma emission point, and improves the service life of the plasma generator. The related technologies including the above technical solution still have many problems, such as: when the plasma generator works, the gas source enters the arc drawing cavity, and the local wind pressure is not uniform, which leads to unstable wind pressure and unstable flame intensity, so the stability of the wind pressure is higher, and the fault tolerance is lower; the cooling effect is not ideal due to unreasonable cooling pipeline, and the anode arc falling point is easy to break down, which affects the service life of the anode. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a low -power single anode's plasma generator, which is used for solving the technical problems of high power consumption, unsatisfactory cooling effect and easy damage of anode affecting service life caused by poor wind pressure stability of the plasma generator in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A low -power single anode's plasma generator, comprising:

[0008] An anode seat for mounting and limiting the anode head;

[0009] The cathode seat is installed on the anode seat and limits the installation of the cathode head, so that the gap between the anode head and the cathode head forms an arc cavity.

[0010] The gas path is arranged on the cathode seat and the anode seat to connect the external gas source and the arc cavity, and provides stable wind pressure for the arc cavity.

[0011] The cooling pipeline includes a total water inlet pipe and a total water return pipe arranged at the end of the cathode seat, and the total water inlet pipe and the total water return pipe are connected through two parallel cooling lines, one of which cools the anode head and the other of which cools the cathode head.

[0012] The gas path is arranged in series with the primary pressure stabilizing chamber and the secondary pressure stabilizing chamber on the channel between the external gas source and the arc cavity, and the primary pressure stabilizing chamber and the secondary pressure stabilizing chamber have a buffering and stabilizing effect on the wind pressure provided by the gas source.

[0013] Further, the anode head is provided with an arc passing hole through which the arc passes, the arc passing hole is arranged as a stepped hole with an inner diameter gradually increasing outward in the direction away from the cathode head, and a chamfer is arranged at the junction of different hole diameters.

[0014] Further, the stepped hole inner diameter of the anode head is D, and the length of the inner diameter is H, wherein D n = 0.5-0.7H n ,D n+1 = 0.5-0.7D n , D1=4-10mm, n>1, n is a natural number.

[0015] Further, the shortest distance between the end face edge of the cathode head and the conical end face of the anode head is L, L=1.5-2.5D1.

[0016] Further, the cathode head is installed on the cathode fixing sleeve, the cathode fixing sleeve is externally sleeved on the insulating sleeve, the insulating sleeve is sleeved in the inner cavity of the anode seat, the primary pressure stabilizing chamber and the secondary pressure stabilizing chamber are arranged as radially recessed grooves on the outer periphery of the insulating sleeve, the outer diameter size of the boss between the primary pressure stabilizing chamber and the secondary pressure stabilizing chamber is smaller than the overall outer diameter size of the insulating sleeve, and the secondary pressure stabilizing chamber is communicated with the arc cavity through the air passage hole penetrating the wall of the insulating sleeve.

[0017] Further, the gas path further includes a cathode gas inlet pipeline penetrating the cathode seat and an anode gas inlet pipeline in the anode seat, one end of the cathode gas inlet pipeline is communicated with the external gas source, the other end is communicated with the anode gas inlet pipeline, and the anode gas inlet pipeline is communicated with the primary pressure stabilizing chamber.

[0018] Further, the axis of the vent hole is at an acute angle with the axis of the insulating sleeve, the axis of the vent hole is inclined towards the cathode head, and the wall of the inner cavity of the insulating sleeve expands radially to form an annular vortex cavity between the outlet of the vent hole and the cathode head.

[0019] Further, the cooling pipeline further comprises a cathode water inlet pipeline and a cathode water return pipeline arranged on the cathode seat, an anode water inlet pipeline and an anode water return pipeline arranged on the anode seat, and an inner water channel and an outer water channel arranged on the cathode fixing sleeve, one end of the cathode water inlet pipeline is communicated with the total water inlet pipeline and the inner water channel, the other end is communicated with the anode water inlet pipeline, the anode water inlet pipeline is communicated with the anode cooling ring groove through an anode water inlet hole, the anode cooling ring groove is communicated with the anode water return pipeline through an anode water outlet hole, the inner water channel is communicated with the outer water channel, the outer water channel is communicated with the cathode water return pipeline through a cathode water outlet hole, and the anode water return pipeline is communicated with the total water return pipeline through the cathode water return pipeline.

[0020] Further, the inner water channel and the outer water channel of the cathode fixing sleeve are arranged concentrically, the cathode water inlet hole is arranged at one end of the cathode fixing sleeve close to the total water inlet pipeline, the inner water channel and the outer water channel are communicated through a radial through hole penetrating the partition layer between the inner water channel and the outer water channel, the radial through hole is arranged at one end close to the cathode head, and a water return cavity is arranged between the outer water channel and the cathode water outlet hole.

[0021] Further, the cathode fixing sleeve is electrically connected with the cathode cable, the anode seat and the cathode seat are both provided with an anode cable channel for connecting the anode cable, and the anode cable is electrically connected with the anode head.

[0022] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0023] (1). The primary pressure stabilizing chamber and the secondary pressure stabilizing chamber arranged in the gas circuit can buffer and stabilize the air pressure input through the air source, thereby providing stable and uniform air pressure for the arc drawing cavity, reducing the requirement of the equipment on air pressure stability, improving the fault tolerance, and thereby reducing the overall power consumption of the equipment.

[0024] (2). The two cooling routes arranged in the cooling pipeline can fully cool the anode head and the cathode head, improve the cooling effect, and thereby avoid the reduction of the service life of the equipment caused by high temperature.

[0025] (3). The utility model discloses an anode head stepped hole arc passing hole and the diameter and length ratio relationship of limiting each hole of arc passing hole, and the distance relationship between anode head and cathode head, realize that the arc falls gradually when passing through arc passing hole, thereby avoid the single arc falling point of arc passing hole to cause anode head to be broken down, and the distance relationship of limiting the inner diameter of arc passing hole and anode head and cathode head simultaneously, make the intensity of arc highest, avoid flame too floating or flame intensity deficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the right view of the utility model;

[0027] Figure 2 It is Figure 1 It is the sectional view of A-A in middle;

[0028] Figure 3 It is Figure 1 It is the sectional view of B-B in middle;

[0029] Figure 4 It is Figure 2 It is the partial enlarged structure schematic diagram of C in middle;

[0030] Figure 5 It is Figure 3 It is the partial enlarged structure schematic diagram of D in middle.

[0031] In the drawing, 100, anode seat;101, anode water outlet hole;102, anode water return pipeline;103, anode water inlet pipeline;104, anode gas inlet pipeline;105, anode gas inlet hole;106, anode water inlet hole;200, anode head;201, anode cooling ring groove;202, conical end face;203, arc passing hole;204, chamfer;301, cathode head;302, cathode fixing sleeve;3021, outer water channel;3022, inner water channel;303, insulating sleeve;3031, primary voltage stabilizing chamber;3032, secondary voltage stabilizing chamber;3033, air vent;3034, arc drawing cavity;400, cathode seat;401, cathode water outlet hole;402, cathode water return pipeline;403, cathode water inlet hole;404, cathode water inlet pipeline;405, cathode gas inlet pipeline;406, water return cavity;500, total water return pipe;600, total water inlet pipe;700, anode cable channel. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0033] The accompanying drawings are included to provide a further understanding of the present patent and are incorporated in and constitute a part of this specification, illustrate embodiments devised to embody the application and explain the principles of the application. It should be understood that these drawings are only illustrative and are various alternatives and should not necessarily be construed as limiting the scope of the present patent.

[0034] The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to limit the application as further described below. As used in the description of the application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It also will be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0035] The following description refers to the accompanying drawings. Wherever possible, the same reference numbers in different drawings refer to the same or similar elements. The following description of the exemplary embodiments is not meant to limit or restrict the application in any way. Instead, the following description is meant to provide an example of how the application can be implemented in accordance with the following claims.

[0036] In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not necessarily mean to describe a specific order or sequence, nor can it be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, in the description of the present application, "a plurality of" means two or more, unless otherwise specified. "And / or" describes the association between the associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. The character " / " generally represents a "or" relationship between the associated objects. The utility model will be further described below in conjunction with the drawings and examples.

[0038] In order to solve the limitations of the prior art, the present embodiment provides a technical scheme, which will be further described below in conjunction with the drawings and examples.

[0039] In view of the poor wind pressure stability of the gas source for providing oxygen in the prior art, leading to high power consumption in wind pressure stability control, and the short service life of the anode caused by the single arc falling point of the anode, the utility model improves the technical structure of the plasma generator, buffers and stabilizes the wind pressure input through the gas source by setting the primary pressure stabilizing chamber 3031 and the secondary pressure stabilizing chamber 3032 in the gas circuit, thereby providing stable and uniform wind pressure for the arc drawing cavity 3034, reducing the requirement of the equipment on the wind pressure stability, improving the fault tolerance, and thereby reducing the overall power consumption of the equipment; by setting two cooling routes in the cooling pipeline, the anode head 200 and the cathode head 301 are fully cooled, the cooling effect is improved, and the reduction of the service life of the equipment caused by high temperature is avoided; by setting the stepped hole-like arc passing hole 203 of the anode head 200, and limiting the diameter and length proportion relationship of each hole of the arc passing hole 203, combined with the distance relationship between the anode head 200 and the cathode head 301, the electric arc gradually falls through the arc passing hole 203, thereby avoiding the breakdown of the anode head 200 caused by the single arc falling point of the arc passing hole 203, and limiting the inner diameter of the arc passing hole 203 and the distance relationship between the anode head 200 and the cathode head 301, so that the intensity of the electric arc is the highest, and the flame is not too floating or the flame intensity is insufficient, for specific details, see the following detailed introduction.

[0040] Referring to the accompanying drawings Figures 1-3The application relates to a low-power single-anode plasma generator, which comprises an anode seat 100 for mounting and limiting an anode head 200, a cathode seat 400 mounted on the anode seat 100 and limiting a cathode head 301, and a gap between the anode head 200 and the cathode head 301 forming a draw arc cavity 3034; the anode head 200 is sleeved in the inner cavity of the anode seat 100, the cathode head 301 is sleeved in the inner cavity of the cathode seat 400, meanwhile, an insulation sleeve 303 and a cathode fixing sleeve 302 are sleeved between the cathode seat 400 and the cathode head 301, so that the gap between the anode head 200 and the cathode head 301, i.e. the draw arc cavity 3034, is formed, and the installation between the components is sealed by sealing rings, such as the installation between the anode head 200 and the anode seat 100, the installation between the anode seat 100 and the cathode seat 400, the installation between the cathode seat 400 and the insulation sleeve 303, the installation between the insulation sleeve 303 and the cathode fixing sleeve 302, and the installation between the cathode fixing sleeve 302 and the cathode head 301; a gas path is arranged on the cathode seat 400 and the anode seat 100 to connect an external gas source and the draw arc cavity 3034, so as to provide stable wind pressure for the draw arc cavity 3034; the stable wind pressure is mainly provided by a stable pressure chamber formed between the insulation sleeve 303 and the anode seat 100, and the stable pressure chamber plays a role in buffering and stabilizing the wind pressure; a cooling pipeline comprises a total water inlet pipe 600 arranged at the end of the cathode seat 400 and a total water return pipe 500, and the total water inlet pipe 600 and the total water return pipe 500 are connected by two parallel cooling lines, one of which cools the anode head 200, and the other of which cools the cathode head 301; the gas path is provided with a primary stable pressure chamber 3031 and a secondary stable pressure chamber 3032 in series on the channel between the external gas source and the draw arc cavity 3034, and the primary stable pressure chamber 3031 and the secondary stable pressure chamber 3032 have the buffering and stabilizing effects on the wind pressure provided by the gas source.

[0041] Referring to the drawings Figure 4 The anode head 200 is provided with an arc passing hole 203 for the power arc to pass through, the arc passing hole 203 is provided as a stepped hole with the inner diameter gradually increasing in the direction away from the cathode head 301, and a chamfer 204 is arranged at the joint of the holes with different diameters; the stepped hole and the chamfer 204 are arranged to make the electric arc fall step by step and prevent the electric arc from falling at a single position and causing the anode head 200 to be broken down at the falling position, so as to prolong the service life of the anode head 200; the stepped hole of the anode head 200 is denoted as D, and the length of the inner diameter is denoted as H, wherein D n = 0.5-0.7Hn, D n+1= 0.5~0.7Dn, D1=4~10mm, n>1, n is a natural number, here n represents the distance from each step hole of the through-arc hole 203 to the cathode head 301 from far to near, such as n1 represents the hole closest to the cathode head 301. The shortest distance between the end face edge of the cathode head 301 and the conical end face 202 of the anode head 200 is L, L=1.5~2.5D1, here the end face edge of the cathode head 301 refers to the circumferential line of the outermost circle of the end face, and the conical end face 202 of the anode head 200 refers to the conical surface provided on the side of the anode head 200 facing the cathode head 301, which is inwardly recessed and gradually reduces in hole diameter, the purpose of limiting the distance between the cathode head 301 and the anode head 200 is to make the intensity of the electric arc highest, avoid too much flame or insufficient flame intensity, if the distance is too close, the flame will be too much, if the distance is too far, the flame intensity will be insufficient.

[0042] Referring to the accompanying drawings Figure 5 The cathode head 301 is mounted on the cathode fixing sleeve 302, the cathode fixing sleeve 302 is externally sleeved on the insulating sleeve 303, the insulating sleeve 303 is sleeved in the inner cavity of the anode seat 100, the primary pressure stabilization chamber 3031 and the secondary pressure stabilization chamber 3032 are spaces formed between the radially recessed grooves provided on the outer circumferential surface of the insulating sleeve 303 and the inner cavity wall of the anode seat 100, the outer diameter dimension of the boss between the primary pressure stabilization chamber 3031 and the secondary pressure stabilization chamber 3032 is smaller than the overall outer diameter dimension of the insulating sleeve 303, here it is to facilitate the gas in the primary pressure stabilization chamber 3031 to enter the secondary pressure stabilization chamber 3032, and the secondary pressure stabilization chamber 3032 is communicated with the arc drawing cavity 3034 through the gas passage hole 3033 penetrating the wall of the insulating sleeve 303.

[0043] Referring to the accompanying drawings Figure 3 The gas path further includes a cathode gas inlet pipeline 405 penetrating the cathode seat 400 and an anode gas inlet pipeline 104 in the anode seat 100, one end of the cathode gas inlet pipeline 405 is communicated with an external gas source, the other end is communicated with the anode gas inlet pipeline 104, and the anode gas inlet pipeline 104 is communicated with the primary pressure stabilization chamber 3031 through the anode gas inlet hole 105. The angle between the axis of the gas passage hole 3033 and the axis of the insulating sleeve 303 is an acute angle, the axis direction of the gas passage hole 3033 is inclined towards the cathode head 301, and the radially outward expansion of the inner cavity wall of the insulating sleeve 303 forms an annular vortex cavity between the outlet position of the gas passage hole 3033 and the cathode head 301, here the annular vortex cavity refers to that after the gas passes through the secondary pressure stabilization chamber 3032 through the gas passage hole 3033, it is pushed towards the position close to the arc drawing cavity 3034 along the outer circumferential surface of the cathode fixing sleeve 302, thereby forming a gas vortex along the outer circumferential surface of the cathode fixing sleeve 302.

[0044] Referring to the accompanying drawings Figure 2The cooling pipeline further comprises a cathode water inlet pipe 404 and a cathode water return pipe 402 arranged on the cathode seat 400, an anode water inlet pipe 103 and an anode water return pipe 102 arranged on the anode seat 100, an outer water channel 3021 and an inner water channel 3022 arranged on the cathode fixing sleeve 302, one end of the cathode water inlet pipe 404 being communicated with the total water inlet pipe 600 and the inner water channel 3022, and the other end being communicated with the anode water inlet pipe 103, the anode water inlet pipe 103 being communicated with the anode cooling ring groove 201 through an anode water inlet hole 106, the anode cooling ring groove 201 being communicated with the anode water return pipe 102 through an anode water outlet hole 101, the inner water channel 3022 being communicated with the outer water channel 3021, the outer water channel 3021 being communicated with the cathode water return pipe 402 through a cathode water outlet hole 401, and the anode water return pipe being communicated with the total water return pipe 500 through the cathode water return pipe 402.

[0045] In use, the cathode head 301 and the anode head 200 are respectively electrified, an arc is generated in the arc drawing cavity 3034, the cooling water enters the inner water channel 3022 of the cathode fixing sleeve 302 through the cathode water inlet hole 403 after entering the total water inlet pipe 600, one way is to cool the cathode head 301, then enters the outer water channel 3021 through the radial through hole, then enters the cathode water return pipe 402 through the cathode water outlet hole 401, and then flows out through the total water return pipe 500, the other way is to enter the anode water inlet pipe 103 through the cathode water inlet pipe 404, then enters the anode cooling ring groove 201 through the anode water inlet hole 106, and then enters the anode water return pipe 102 through the anode water outlet hole 101, and then is discharged through the total water return pipe 500 through the cathode water return pipe 402, so as to complete the cooling operation; at the same time, the gas source enters the anode gas inlet pipe 104 through the cathode gas inlet pipe 405, then enters the primary pressure stabilizing chamber 3031 and the secondary pressure stabilizing chamber 3032 through the anode gas inlet hole 105 in sequence, then enters the arc drawing cavity 3034 through the air hole 3033, and then enters the through-arc hole 203 with the arc, so as to help the arc to be conveyed forward and to fall.

[0046] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0047] The above description is merely the preferred embodiments of the present application and is not intended in any way to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low power consumption single anode plasma generator, characterized by, The application relates to a cathode and anode head assembly for a high-power vacuum arc discharge device. The anode seat (100) is used for mounting and limiting the anode head (200); the cathode seat (400) is mounted on the anode seat (100) and is used for mounting and limiting the cathode head (301), so that a gap between the anode head (200) and the cathode head (301) forms a striking arc cavity (3034); an air path is arranged on the cathode seat (400) and the anode seat (100) to connect an external air source and the striking arc cavity (3034) and provide stable air pressure for the striking arc cavity (3034); a cooling pipeline comprises a total water inlet pipe (600) and a total water return pipe (500) arranged at the end of the cathode seat (400), the total water inlet pipe (600) and the total water return pipe (500) are connected through two parallel cooling lines, one of which is used for cooling the anode head (200) and the other of which is used for cooling the cathode head (301); the air path is provided with a primary pressure stabilizing chamber (3031) and a secondary pressure stabilizing chamber (3032) in series on the channel between the external air source and the striking arc cavity (3034), and the primary pressure stabilizing chamber (3031) and the secondary pressure stabilizing chamber (3032) have a buffer and stabilizing effect on the air pressure provided by the air source. The anode head (200) is provided with a striking arc hole (203) through which the striking arc passes, the striking arc hole (203) is arranged as a stepped hole with an increasing inner diameter away from the cathode head (301), and a chamfer (204) is arranged at the joint of the holes with different diameters. The shortest distance between the end face edge of the cathode head (301) and the conical end face (202) of the anode head (200) is L, and L=1.5-2.5D1. The cathode head (301) is mounted on a cathode fixing sleeve (302), the cathode fixing sleeve (302) is sleeved on an insulating sleeve (303), the insulating sleeve (303) is sleeved in the inner cavity of the anode seat (100), the primary pressure stabilizing chamber (3031) and the secondary pressure stabilizing chamber (3032) are recessed grooves arranged on the outer circumferential surface of the insulating sleeve (303) in the radial direction, the outer diameter of the boss between the primary pressure stabilizing chamber (3031) and the secondary pressure stabilizing chamber (3032) is smaller than the overall outer diameter of the insulating sleeve (303), and the secondary pressure stabilizing chamber (3032) is communicated with the striking arc cavity (3034) through an air hole (3033) penetrating the wall of the insulating sleeve (303). The air path further comprises a cathode air inlet pipeline (405) penetrating the cathode seat (400) and an anode air inlet pipeline (104) in the anode seat (100), one end of the cathode air inlet pipeline (405) is communicated with the external air source, the other end is communicated with the anode air inlet pipeline (104), and the anode air inlet pipeline (104) is communicated with the primary pressure stabilizing chamber (3031).

2. The low power consumption single anode plasma generator according to claim 1, wherein The air hole (3033) is arranged at an acute angle with the axis of the insulating sleeve (303), the axis direction of the air hole (3033) is inclined towards the cathode head (301), and the inner cavity wall of the insulating sleeve (303) is expanded in the radial direction, so that an annular vortex cavity is formed between the outlet position of the air hole (3033) and the cathode head (301).

3. The low power consumption single anode plasma generator according to claim 2, wherein The stepped hole of the anode head (200) has an inner diameter D and a length H, wherein D n = 0.5-0.7Hn, D n+1 = 0.5-0.7Dn, D1 = 4-10mm, n>1, n is a natural number.

4. The low power consumption single anode plasma generator according to claim 3, wherein ​ 5. The low power consumption single anode plasma generator according to claim 1, wherein ​ 6. A low power consumption single anode plasma generator according to claim 5, wherein ​ 7. A low power consumption single anode plasma generator according to claim 6, wherein ​ 8. The low power consumption single anode plasma generator according to claim 1, wherein The cooling pipeline further comprises a cathode water inlet pipe (404) and a cathode water return pipe (402) arranged on the cathode seat (400), an anode water inlet pipe (103) and an anode water return pipe (102) arranged on the anode seat (100), an outer water channel (3021) and an inner water channel (3022) arranged on the cathode fixing sleeve (302), one end of the cathode water inlet pipe (404) being in communication with the total water inlet pipe (600) and the inner water channel (3022), the other end being in communication with the anode water inlet pipe (103), the anode water inlet pipe (103) being in communication with the anode cooling ring groove (201) through the anode water inlet hole (106), the anode cooling ring groove (201) being in communication with the anode water return pipe (102) through the anode water outlet hole (101), the inner water channel (3022) being in communication with the outer water channel (3021), the outer water channel (3021) being in communication with the cathode water return pipe (402) through the cathode water outlet hole (401), and the cathode water return pipe (402) being in communication with the total water return pipe (500).

9. The low power consumption single anode plasma generator according to claim 8, wherein The inner water channel (3022) and the outer water channel (3021) of the cathode fixing sleeve (302) are arranged concentrically, the cathode water inlet hole (403) is arranged at one end of the cathode fixing sleeve (302) close to the total water inlet pipe (600), the inner water channel (3022) and the outer water channel (3021) are in communication through a radial through hole penetrating the partition layer between the inner water channel (3022) and the outer water channel (3021), the radial through hole being arranged at one end close to the cathode head (301), and a water return cavity (406) is arranged between the outer water channel (3021) and the cathode water outlet hole (401).

10. The low power consumption single anode plasma generator according to claim 9, wherein The cathode fixing sleeve (302) is electrically connected with the cathode cable, the anode seat (100) and the cathode seat (400) are both provided with an anode cable passage (700) for connecting the anode cable, and the anode cable is electrically connected with the anode head (200).

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