A perimeter wind plasma generator

Abstract

The utility model relates to a kind of perimeter wind plasma generator, including shell, first electrode assembly, second electrode assembly, cyclone ring and perimeter wind component, shell sets working medium gas flow channel;First electrode assembly and second electrode assembly are mutually insulated and set in shell, and arc channel is formed in the inside axial hollow of second electrode assembly, and it is set in the outside of first electrode assembly;Working medium gas flow channel and arc channel are communicated by cyclone ring;Perimeter wind component includes perimeter wind sleeve and perimeter wind ring, and first through-flow gap is formed between perimeter wind sleeve and second electrode assembly, one end of first through-flow gap is communicated with working medium gas flow channel, and the other end forms perimeter wind outlet, and perimeter wind ring is set in first through-flow gap.Perimeter wind ring and cyclone ring are matched and designed, and the proportion of working medium gas in arc channel and perimeter wind sleeve is adjusted, different forms of plasma arc can be output, and the demand of different application scenarios is satisfied.

Description

Technical Field

[0001] This utility model relates to the field of plasma generation equipment technology, and in particular to a perimeter wind plasma generator. Background Technology

[0002] Compared with traditional oil gun ignition, plasma ignition has advantages such as being environmentally friendly, efficient, highly automated, and more economical. Therefore, plasma ignition has been widely used in fields such as coupling ignition, waste gas treatment, material treatment, and surface modification.

[0003] Perimeter wind plasma generator is one of the core components of plasma ignition device. Currently, the existing low-power perimeter wind plasma generators output a single plasma arc pattern, which cannot meet the needs of different application scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a perimeter wind plasma generator that can output plasma arcs of different shapes to meet the needs of different application scenarios.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A perimeter wind plasma generator, comprising:

[0007] The casing is equipped with a working gas flow channel;

[0008] A first electrode assembly is disposed in the housing;

[0009] The second electrode assembly is disposed in the housing insulated from the first electrode assembly. The second electrode assembly is axially hollow inside to form an arc channel and is sleeved on the outside of the first electrode assembly.

[0010] A swirl ring is disposed between the working gas flow channel and the electric arc channel. The swirl ring has multiple vent holes evenly distributed around its circumference. The working gas flow channel and the electric arc channel are connected through the vent holes. The center line of the vent holes is inclined relative to the axis of the swirl ring and does not pass through the axis of the swirl ring.

[0011] A perimeter wind assembly includes a perimeter wind sleeve and a perimeter wind ring. One end of the perimeter wind sleeve is connected to the housing and sleeved around the second electrode assembly. A first flow gap is formed between the perimeter wind sleeve and the second electrode assembly. One end of the first flow gap is connected to the working gas flow channel, and the other end forms a perimeter wind outlet around the end of the arc channel away from the housing. The perimeter wind ring is disposed in the first flow gap. The perimeter wind ring has a plurality of perimeter wind holes evenly distributed circumferentially. The center line of the perimeter wind holes is inclined relative to the axis of the perimeter wind ring and does not pass through the axis of the perimeter wind ring.

[0012] In one embodiment of this application, the housing is provided with a coolant inlet channel, a coolant outlet channel, and a coolant connecting channel. The first electrode assembly is provided with a first electrode cooling channel, the inlet end of which is connected to the coolant inlet channel, and the outlet end of which is connected to the inlet end of the coolant connecting channel. The second electrode assembly is provided with a second electrode cooling channel, the inlet end of which is connected to the outlet end of the coolant connecting channel, and the outlet end of which is connected to the coolant outlet channel.

[0013] In one embodiment of this application, the housing includes an inner shell, an isolation layer, and an outer shell sequentially disposed from the inside out. The inner shell and the outer shell are insulated from each other by the isolation layer. The first electrode assembly is disposed in the inner shell, the second electrode assembly is disposed in the outer shell, the coolant inlet channel is disposed in the inner shell, and the coolant outlet channel and the working gas channel are disposed in the outer shell. The inner shell, the isolation layer, and the outer shell together form the coolant communication channel.

[0014] In one embodiment of this application, the first electrode assembly includes a first electrode body and a cooling inner tube. The first electrode body is sleeved outside the first end of the cooling inner tube, and a second flow gap is formed between the inner wall surface of the first electrode body, the outer tube wall of the cooling inner tube, and the first end face. The second flow gap communicates with the cavity of the cooling inner tube to form the first electrode cooling channel. The second end of the cooling inner tube serves as the inlet end of the first electrode cooling channel and communicates with the coolant inlet channel. The end of the second flow gap away from the first end of the cooling inner tube serves as the outlet end of the first electrode cooling channel and communicates with the inlet end of the coolant communication channel.

[0015] In one embodiment of this application, the outer wall surface of the first electrode body at the end away from the housing is a first arc-starting structure. The first arc-starting structure includes a columnar outer peripheral surface, a first conical surface, and an electrode end surface connected in sequence from near to far from the housing. The first conical surface gradually tapers from the end connected to the columnar outer peripheral surface.

[0016] In one embodiment of this application, the second electrode assembly includes a second electrode body and a cooling jacket. The interior of the second electrode body is axially hollow to form the arc channel. The cooling jacket is fitted over the second electrode body, and a third flow passage is formed between the cooling jacket and the second electrode body. A fourth flow passage is provided inside the cooling jacket. The end of the third flow passage away from the housing and the end of the fourth flow passage away from the housing are connected to form a cooling channel for the second electrode. The end of the third flow passage near the housing serves as the inlet end of the cooling channel for the second electrode and is connected to the outlet end of the coolant communication channel. The end of the fourth flow passage near the housing serves as the outlet end of the cooling channel for the second electrode and is connected to the coolant outlet channel.

[0017] In one embodiment of this application, the cooling jacket includes an inner sleeve and an outer sleeve. The inner sleeve is fitted onto the second electrode body, and the outer sleeve is fitted onto the inner sleeve. The gap between the inner sleeve and the second electrode body is the third flow gap, and the gap between the outer sleeve and the inner sleeve is the fourth flow gap.

[0018] In one embodiment of this application, one or more sets of support bosses are provided between the second electrode body and the inner sleeve and / or between the second electrode body and the outer sleeve, and each set of support bosses includes at least two support bosses evenly distributed along the circumference.

[0019] In one embodiment of this application, the inner wall surface of the arc channel near the end of the housing is a second arc-starting structure. The second arc-starting structure is sleeved outside the first arc-starting structure. The second arc-starting structure includes a first columnar inner circumferential surface, a second conical surface, and a second columnar inner circumferential surface connected in sequence from near to far from the housing. The second conical surface gradually tapers from the end connected to the first columnar inner circumferential surface.

[0020] In one embodiment of this application, the inner wall surface of the arc channel further includes a third conical surface, a third columnar inner circumferential surface, a fourth conical surface, and a fourth columnar inner circumferential surface, which are connected sequentially from the nearest to the farthest end of the second columnar inner circumferential surface away from the second conical surface, according to their distance from the housing. The third conical surface gradually narrows from the end connected to the second columnar inner circumferential surface, and the fourth conical surface gradually widens from the end connected to the third columnar inner circumferential surface.

[0021] As can be seen from the above technical solutions, this utility model discloses a perimeter wind plasma generator, which includes a shell, a first electrode assembly, a second electrode assembly, a swirling ring, and a perimeter wind assembly. The shell is provided with a working gas flow channel; the first electrode assembly is disposed in the shell, and the outer wall surface of the end of the first electrode assembly away from the shell is a first arc-starting structure; the second electrode assembly is disposed insulated from the first electrode assembly in the shell, and the interior of the second electrode assembly is axially hollow to form an arc channel. The inner wall surface of the arc channel near the shell is a second arc-starting structure, which is sleeved outside the first arc-starting structure; the swirling ring is disposed between the working gas flow channel and the arc channel. The swirl ring has multiple vent holes evenly distributed circumferentially. The working gas flow channel and the electric arc channel are connected through the vent holes. The center line of the vent holes is inclined relative to the axis of the swirl ring and does not pass through the axis of the swirl ring. The perimeter wind assembly includes a perimeter wind sleeve and a perimeter wind ring. One end of the perimeter wind sleeve is connected to the shell and sleeved on the outside of the second electrode assembly. A first flow gap is formed between the perimeter wind sleeve and the second electrode assembly. One end of the first flow gap is connected to the working gas flow channel, and the other end forms a perimeter wind outlet around the end of the electric arc channel away from the shell. The perimeter wind ring is set in the first flow gap. The perimeter wind ring has multiple perimeter wind holes evenly distributed circumferentially. The center line of the perimeter wind holes is inclined relative to the axis of the perimeter wind ring and does not pass through the axis of the perimeter wind ring.

[0022] In application, the working gas is split into two within the working gas flow channel. One path enters the arc channel via a swirling ring. Due to the inclined design of the vent holes, the working gas forms a rotating gas flow field, which makes the distribution of the working gas within the arc channel more uniform and also makes the distribution of the subsequently generated plasma more uniform, thereby improving the stability and uniformity of the generated plasma. The other path enters the perimeter wind sleeve and is ejected from the perimeter wind outlet after passing through the perimeter wind ring.

[0023] One of the first electrode assembly and the second electrode assembly is connected to the positive terminal of the power supply, and the other is connected to the negative terminal of the power supply. A strong electric field is formed between the first arc-starting structure of the first electrode assembly and the second arc-starting structure of the second electrode assembly located near the end of the arc channel near the shell. Under the action of the strong electric field, the working gas molecules are excited to form a high-energy plasma.

[0024] By matching the design of the swirl ring and the perimeter wind ring structure, as well as the position of the perimeter wind ring, and adjusting the ratio of the working gas in the arc channel and the working gas in the perimeter wind ring, different forms of plasma arcs can be output, thereby meeting the needs of different application scenarios. Attached Figure Description

[0025] 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.

[0026] Figure 1 An axial sectional view of a perimeter wind plasma generator provided in an embodiment of this utility model;

[0027] Figure 2 An axial cross-sectional view of the perimeter wind plasma generator provided in an embodiment of this utility model;

[0028] Figure 3 An axial cross-sectional view of the second electrode body of a perimeter wind plasma generator provided in one embodiment of the present invention;

[0029] Figure 4 An axial cross-sectional view of the second electrode body of a perimeter wind plasma generator provided in another embodiment of the present invention.

[0030] In the picture:

[0031] 100 is the outer shell; 110 is the inner shell; 120 is the isolation layer; 130 is the outer shell; 131 is the rear end cover; 132 is the outer sleeve; 133 is the inner sleeve; 134 is the front end cover; 100a is the coolant inlet channel; 100b is the coolant connecting channel; 100c is the coolant outlet channel; 100d is the working gas channel.

[0032] 200 is the first electrode assembly; 210 is the first electrode body; 211 is the columnar outer peripheral surface; 212 is the first conical surface; 213 is the electrode end face; 214 is the axial boss; 220 is the cooling inner tube; 200a is the second flow passage gap;

[0033] 300 is the second electrode assembly; 310 is the second electrode body; 311 is the first columnar inner circumferential surface; 312 is the second conical surface; 313 is the second columnar inner circumferential surface; 314 is the third conical surface; 315 is the third columnar inner circumferential surface; 316 is the fourth conical surface; 317 is the fourth columnar inner circumferential surface; 310a is the supporting boss; 310b is the limiting boss; 310c is the arc-starting electrode; 310d is the output electrode; 320 is the cooling jacket; 321 is the inner sleeve; 322 is the outer sleeve; 300a is the arc channel; 300b is the third current-passing gap; 300c is the fourth current-passing gap;

[0034] 400 is a swirl ring;

[0035] 500 is the perimeter wind assembly; 510 is the perimeter wind sleeve; 520 is the perimeter wind ring; 500a is the first flow gap. Detailed Implementation

[0036] The core of this invention is to provide a perimeter wind plasma generator, whose structural design enables it to increase the service life of the electrodes and improve the stability and uniformity of the generated plasma.

[0037] 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.

[0038] Please see Figure 1 and Figure 2 .

[0039] This utility model discloses a perimeter wind plasma generator, which includes a housing 100, a first electrode assembly 200, a second electrode assembly 300, a swirling ring 400, and a perimeter wind assembly 500.

[0040] The housing 100 is provided with a working gas flow channel 100d, which is used to supply working gas to the first electrode assembly 200 and the second electrode assembly 300. The working gas includes, but is not limited to, argon and air.

[0041] The first electrode assembly 200 is disposed on the housing 100, and the outer wall surface of the end of the first electrode assembly 200 away from the housing 100 is the first arc-starting structure.

[0042] The second electrode assembly 300 is disposed in the housing 100 insulated from the first electrode assembly 200. The second electrode assembly 300 is axially hollow to form an arc channel 300a. The inner wall surface of the arc channel 300a near the housing 100 is a second arc-starting structure. The second arc-starting structure is sleeved outside the first arc-starting structure, and an arc-starting cavity is formed between the first arc-starting structure and the second arc-starting structure.

[0043] The swirling ring 400 is disposed between the working gas flow channel 100d and the arc channel 300a. According to the structural design of the perimeter wind plasma generator, the swirling ring 400 can be fixed on the housing 100, or between the first electrode assembly 200 and the second electrode assembly 300, or between the first electrode assembly 200 and the housing 100, or between the second electrode assembly 300 and the housing 100. No specific limitation is made here, as long as the working gas flow channel 100d is connected to the arc channel 300a through the swirling ring 400. The swirling ring 400 has multiple vent holes evenly distributed around its circumference. The working gas flow channel 100d and the arc channel 300a are connected through the vent holes. The center line of the vent holes is inclined relative to the axis of the swirling ring 400 and does not pass through the axis of the swirling ring 400, so that after the working gas passes through the swirling ring 400, it forms a gas flow field that rotates forward around the axis of the second electrode assembly 300.

[0044] The structure of the swirl ring 400 can be designed to match the overall structure and size of the perimeter wind plasma generator, as well as the structure and size of the perimeter wind ring 520 described below. In one embodiment of this application, the swirl ring 400 has 4 to 10 vent holes evenly arranged in the circumferential direction, and the diameter of the vent holes is 1.1 mm to 3.5 mm.

[0045] The perimeter wind assembly 500 includes a perimeter wind sleeve 510 and a perimeter wind ring 520. One end of the perimeter wind sleeve 510 is connected to the housing 100 and sleeved around the second electrode assembly 300. A first flow gap 500a is formed between the perimeter wind sleeve 510 and the second electrode assembly 300. One end of the first flow gap 500a is connected to the working gas flow channel 100d, and the other end forms a perimeter wind outlet around the end of the arc channel 300a away from the housing 100. The perimeter wind ring 520... 20 is set in the first flow gap 500a. The inner ring of the perimeter wind ring 520 is sleeved outside the second electrode assembly 300, and the outer ring is nested in the inner wall of the perimeter wind sleeve 510. The perimeter wind ring 520 has multiple perimeter wind holes evenly distributed in the circumferential direction. The center line of the perimeter wind hole is inclined relative to the axis of the perimeter wind ring 520 and does not pass through the axis of the perimeter wind ring 520, so that after the working gas passes through the perimeter wind ring 520, a gas flow field that rotates forward around the axis of the second electrode assembly 300 is formed.

[0046] Similar to the swirl ring 400, the structure of the perimeter wind ring 520 can be designed to match the overall structure and size of the perimeter wind plasma generator, as well as the structure and size of the aforementioned swirl ring 400. In one embodiment of this application, the axial length of the perimeter wind ring 520 is 10 mm to 30 mm, and 4 to 10 perimeter wind holes are evenly arranged circumferentially on the perimeter wind ring 520, with a hole diameter of 2 mm to 5 mm.

[0047] Compared with the prior art, the perimeter wind plasma generator provided in this application splits the working gas into two streams in the working gas flow channel 100d. One stream enters the arc channel 300a through the swirl ring 400. Due to the inclined arrangement of the vent holes, the working gas forms a rotating gas flow field, which makes the distribution of the working gas in the arc channel 300a more uniform and also makes the distribution of the subsequently generated plasma more uniform, thereby improving the stability and uniformity of the generated plasma. The other stream enters the perimeter wind sleeve 510 and is ejected from the perimeter wind outlet through the perimeter wind ring 520.

[0048] One of the first electrode assembly 200 and the second electrode assembly 300 is connected to the positive terminal of the power supply, and the other is connected to the negative terminal of the power supply. A strong electric field is formed between the first arc-starting structure of the first electrode assembly 200 and the second arc-starting structure of the second electrode assembly 300, which are located at one end of the arc channel 300a near the housing 100. Under the action of the strong electric field, the working gas molecules are excited to form a high-energy plasma.

[0049] By matching the design of the swirl ring 400 and the perimeter wind ring 520 structure and the position of the perimeter wind ring 520, and adjusting the proportion of the working gas in the arc channel 300a and the 510 kinds of working gas in the perimeter wind sleeve, different forms of plasma arcs can be output, thereby meeting the needs of different application scenarios.

[0050] To further optimize the above technical solution, in one embodiment of this application, the flow cross-sectional area of ​​the perimeter wind hole of the perimeter wind assembly 500 is adjustable. That is, the perimeter wind sleeve 510 includes a front wind sleeve and a rear wind sleeve that are rotatably and sealedly connected along the axial direction. The rear wind sleeve is connected to the housing. The perimeter wind ring 520 is disposed on one of the front wind sleeve and the rear wind sleeve. Multiple baffles are arranged circumferentially on the inner wall of the other of the two wind sleeves. The number of baffles is the same as the number of perimeter wind holes on the perimeter wind ring 520. The baffles slide in contact with the perimeter wind ring 520. When the front wind sleeve and the rear wind sleeve are rotated relative to each other, the baffles can rotate relative to the perimeter wind ring 520, thereby moving between the position of completely avoiding the perimeter wind hole and the position of completely blocking the perimeter wind hole, so as to adjust the flow cross-sectional area of ​​the perimeter wind hole, thereby realizing the function of flexibly adjusting the ratio of working gas in the arc channel 300a and the working gas in the perimeter wind sleeve 510.

[0051] It is foreseeable that the first electrode assembly 200 and the second electrode assembly 300 will generate high temperatures during operation. If effective heat dissipation is not achieved, it will affect the operating efficiency and service life of the perimeter wind plasma generator. Therefore, in one embodiment of this application, such as Figure 1 and Figure 2As shown, the housing 100 is provided with a coolant inlet channel 100a, a coolant outlet channel 100c, and a coolant connecting channel 100b. The first electrode assembly 200 is provided with a first electrode cooling channel, the inlet end of which is connected to the coolant inlet channel 100a, and the outlet end of which is connected to the inlet end of the coolant connecting channel 100b. The second electrode assembly 300 is provided with a second electrode cooling channel, the inlet end of which is connected to the outlet end of the coolant connecting channel 100b, and the outlet end of which is connected to the coolant outlet channel 100c.

[0052] When the perimeter wind plasma generator is running, the aforementioned coolant inlet channel 100a and coolant outlet channel 100c are respectively connected to an external cooling device. The external cooling device drives the coolant to flow in from the coolant inlet channel 100a, and then sequentially through the first electrode cooling channel, the coolant connecting channel 100b, and the second electrode cooling channel, and finally flow out through the coolant outlet channel 100c, returning to the external cooling device to form a coolant circulation. This can achieve cooling and temperature reduction of the first electrode assembly 200 and the second electrode assembly 300, avoiding excessive temperature of the first electrode assembly 200 and the second electrode assembly 300, ensuring the temperature stability of the core components (first electrode assembly 200 and second electrode assembly 300) of the perimeter wind plasma generator during operation, and improving the operating efficiency and service life of the perimeter wind plasma generator.

[0053] like Figure 1 and Figure 2 As shown, in one embodiment of this application, the housing 100 includes an inner shell 110, an insulating layer 120, and an outer shell 130 sequentially fitted from the inside out. The inner shell 110 and outer shell 130 serve as the main support structures, providing mounting positions and support for the first electrode assembly 200 and the second electrode assembly 300. The inner shell 110 and outer shell 130 are made of high-strength, high-temperature resistant, corrosion-resistant, and highly conductive materials to ensure the stability and durability of the equipment under high-temperature conditions. The outer shell 130 is preferably made of stainless steel, and the inner shell 110 is preferably made of copper. The insulating layer 120 is made of a material with strong electrical insulation, corrosion resistance, and high-temperature resistance to ensure electrical isolation between the outer shell 130 and the inner shell 110. The insulating layer 120 is preferably made of alumina. It should be noted that the specific materials of the outer shell 130, inner shell 110, and insulating layer 120 are merely one feasible solution provided in this application and are not limited to this. Other materials that meet the requirements can also be used for the outer shell 130, inner shell 110, and insulating layer 120, which are not limited here.

[0054] The inner shell 110 and the outer shell 130 are insulated by the isolation layer 120. The first electrode assembly 200 is disposed in the inner shell 110, the second electrode assembly 300 is disposed in the outer shell 130, the coolant inlet channel 100a is disposed in the inner shell 110, the coolant outlet channel 100c and the working gas channel 100d are disposed in the outer shell 130, and the inner shell 110, the isolation layer 120 and the outer shell 130 together form the coolant connecting channel 100b.

[0055] Specifically, such as Figure 1 and Figure 2 As shown, the outer casing 130 includes a rear end cover 131, an outer sleeve 132, an inner sleeve 133, and a front end cover 134. The outer sleeve 132 is sleeved outside the inner sleeve 133. The two ends of the outer sleeve 132 and the two ends of the inner sleeve 133 are respectively connected to the rear end cover 131 and the front end cover 134. The rear end cover 131 and the inner sleeve 133 together form a first assembly cavity for assembling the isolation layer 120, the inner shell 110, and the first electrode assembly 200. The front end cover 134 and the inner sleeve 133 together form a second assembly cavity for assembling the second electrode assembly 300.

[0056] Three baffles (not shown in the figure) are provided between the inner sleeve 133 and the outer sleeve 132. The three baffles extend from one end of the gap between the inner sleeve 133 and the outer sleeve 132 along the axial direction of the inner sleeve 133 and the outer sleeve 132 to the other end, dividing the annular gap between the inner sleeve 133 and the outer sleeve 132 into three cavities, which are used for the supply and return of coolant and the supply of working gas, respectively.

[0057] The rear cover 131 is provided with a first return water section, and the front cover 134 is provided with a second return water section. The first return water section and the second return water section are connected to the return water baffle between the inner sleeve 133 and the outer sleeve 132 to form a coolant outlet flow channel 100c.

[0058] The front cover 134 is provided with a water supply section, which is connected to the water supply cavity between the inner sleeve 133 and the outer sleeve 132, forming part of the coolant connecting channel 100b. At the same time, the inner shell 110 is provided with a plurality of first connecting holes at intervals along the circumference, and the isolation layer 120 is provided with a plurality of second connecting holes at intervals along the circumference. The number of first connecting holes is the same as the number of second connecting holes, and they are connected one by one. The inner sleeve 133 is provided with a circumferential annular groove at the position corresponding to the second connecting hole. A third connecting hole for communicating with the water supply cavity is provided on the outer periphery of the circumferential annular groove. The first connecting holes, second connecting holes, third connecting holes and circumferential annular groove constitute another part of the coolant connecting channel 100b. The diameter of the first connecting holes and second connecting holes is 2 mm to 4 mm, and the number of holes is 6 to 10. One or more third connecting holes are provided, and the diameter of the third connecting holes is slightly larger than the diameter of the first connecting holes and second connecting holes.

[0059] The outlet end of the coolant outlet channel 100c and the inlet end of the working gas channel 100d are both located on the rear end cover 131. The outlet end of the coolant outlet channel 100c and the inlet end of the working gas channel 100d are connected to the gas source and the external cooling device by means of conversion connectors and quick-connect connectors.

[0060] To improve the cooling effect on the first electrode assembly 200, such as Figure 1 and Figure 2 As shown, the first electrode assembly 200 includes a first electrode body 210 and a cooling inner tube 220. The first electrode body 210 is sleeved on the outside of the first end of the cooling inner tube 220, and a second flow gap 200a is formed between the inner wall surface of the first electrode body 210, the outer tube wall of the cooling inner tube 220, and the first end face. The second flow gap 200a communicates with the cavity of the cooling inner tube 220 to form a first electrode cooling channel. The second end of the cooling inner tube 220 serves as the inlet end of the first electrode cooling channel and communicates with the coolant inlet channel 100a. The end of the second flow gap 200a away from the first end of the cooling inner tube 220 serves as the outlet end of the first electrode cooling channel and communicates with the inlet end of the coolant communication channel 100b.

[0061] During operation, the coolant first enters the cavity of the inner cooling tube 220 from the coolant inlet channel 100a, and flows along the cavity of the inner cooling tube 220 from the second end to the first end. Then, it passes through the first flow gap 500a and flows into the coolant connecting channel 100b. It can be seen that by setting the inner cooling tube 220 in the first electrode body 210, the flow path of the coolant can be planned, so that the coolant flows through all parts of the inner wall surface of the first electrode body 210, thereby improving the cooling effect of the first electrode body 210 and reducing the working temperature of the first electrode body 210.

[0062] To further optimize the above technical solution, in one embodiment of this application, an axial boss 214 is provided on the inner end face of the first electrode body 210. The axial boss 214 extends from the first end of the cooling inner tube 220 into the cavity of the cooling inner tube 220. An annular gap is formed between the circumferential wall surface of the axial boss 214 and the inner wall of the cavity of the cooling inner tube 220, so as to increase the heat exchange contact area between the end of the first electrode body 210 and the coolant, and further enhance the cooling effect on the first electrode body 210.

[0063] To further improve the heat dissipation effect of the first electrode assembly 200, heat dissipation fins can be evenly distributed circumferentially at at least one of the three locations: the outer wall of the cooling inner tube 220, the inner wall of the first electrode body 210, and the circumferential wall of the axial boss 214. The heat dissipation fins extend axially along the first electrode assembly 200, thereby increasing the heat exchange area. At the same time, the heat dissipation fins disposed between the cooling inner tube 220 and the first electrode body 210 can also support the cooling inner tube 220, so that the cooling inner tube 220 remains stable relative to the first electrode body 210 under the action of the coolant.

[0064] like Figure 1 and Figure 2 As shown, in one embodiment of this application, the second electrode assembly 300 includes a second electrode body 310 and a cooling jacket 320. The interior of the second electrode body 310 is axially hollow to form an arc channel 300a. The cooling jacket 320 is sleeved on the outside of the second electrode body 310. A third flow gap 300b is formed between the cooling jacket 320 and the second electrode body 310. A fourth flow gap 300c is provided inside the cooling jacket 320. The end of the third flow gap 300b away from the housing 100 and the end of the fourth flow gap 300c away from the housing 100 are connected to form a second electrode cooling channel. The end of the third flow gap 300b near the housing 100 serves as the inlet end of the second electrode cooling channel and is connected to the outlet end of the coolant connecting channel 100b. The end of the fourth flow gap 300c near the housing 100 serves as the outlet end of the second electrode cooling channel and is connected to the coolant outlet channel 100c.

[0065] During operation, coolant flows from the coolant connecting channel into the third flow gap 300b, and flows along the third flow gap 300b from the end of the second electrode assembly 300 near the housing 100 to the end away from the housing 100. After turning at the end of the second electrode assembly 300 away from the housing 100, it enters the fourth flow gap 300c, and flows along the fourth flow gap 300c from the end away from the housing 100 to the end of the second electrode assembly 300 near the housing 100, and finally enters the coolant outlet channel 100c, thus completing the cooling of the second electrode assembly 300.

[0066] In a further optimization of the above technical solution, in one embodiment of this application, the cooling jacket 320 includes an inner sleeve 321 and an outer sleeve 322. The inner sleeve 321 is sleeved on the second electrode body 310, and the outer sleeve 322 is sleeved outside the inner sleeve 321. The gap between the inner sleeve 321 and the second electrode body 310 is a third flow gap 300b, and the gap between the outer sleeve 322 and the inner sleeve 321 is a fourth flow gap 300c.

[0067] To improve the stability of the second electrode body 310, one or more sets of support bosses 310a are provided between the second electrode body 310 and the inner sleeve 321 and / or between the second electrode body 310 and the outer sleeve 322. Each set of support bosses 310a includes at least two support bosses 310a evenly distributed along the circumference. The support bosses 310a are provided on the second electrode body 310, and the top surface of the support bosses 310a contacts and cooperates with the inner wall surface of the inner sleeve 321 or the outer sleeve 322. Alternatively, the support bosses 310a are provided on the inner wall surface of the inner sleeve 321 or the outer sleeve 322, and the top surface of the support bosses 310a contacts and cooperates with the outer wall surface of the second electrode body 310, thereby improving the stability of the second electrode body 310.

[0068] Furthermore, the aforementioned support boss 310a is disposed at the end of the second electrode body 310 away from the housing 100.

[0069] Specifically, in one particular embodiment of this application, such as Figures 1 to 4 As shown, a plurality of support protrusions 310a are provided circumferentially on the outer wall surface of the second electrode body 310. A gap for coolant to pass through is formed between two adjacent support protrusions 310a. The support protrusions 310a are away from the top surface of the second electrode body 310. That is, the end face of the support protrusions 310a that is away from the second electrode body 310 along the radial direction of the second electrode body 310 contacts and engages with the inner wall surface of the inner sleeve 321.

[0070] Furthermore, such as Figures 1 to 4 As shown, a limiting boss 310b is provided on the outer wall surface of the second electrode body 310 on the side of the supporting boss 310a away from the housing 100, and a pressing boss is provided on the inner wall surface of the end of the outer sleeve 322 away from the housing 100. The pressing boss protrudes radially toward the axis of the outer sleeve 322. During assembly, the annular stepped surface of the pressing boss facing the housing 100 contacts and engages with the annular stepped surface of the limiting boss 310b facing away from the housing 100, thereby engaging with the housing 100 and limiting the second electrode body 310 axially and radially.

[0071] To improve the cooling effect on the second electrode body 310, multiple heat dissipation fins can be evenly distributed circumferentially on the outer wall surface of the second electrode body 310, and the heat dissipation fins extend along the axial direction of the second electrode body 310.

[0072] like Figure 1 and Figure 2As shown, in this application, the swirl ring 400 contacts and engages with the first electrode body 210 and the second electrode body 310 respectively. Therefore, the swirl ring 400 is made of insulating material. The swirl ring 400 includes a ring body. The inner wall surface of one end of the ring body is provided with an inner ring boss that protrudes inward along the radial direction of the ring body. The outer wall surface of the other end is provided with an outer ring boss that protrudes outward along the radial direction of the ring body. The inner ring boss is sleeved on the first electrode body 210. The outer ring boss engages with the inner wall of the inner sleeve 133. The end face of the outer ring boss away from the inner ring boss contacts and engages with the end face of the second electrode body 310.

[0073] To further improve arc stability, such as Figure 1 and Figure 2 As shown, the outer wall surface of the first electrode body 210 away from the housing 100 is the first arc-starting structure. In one embodiment of this application, the first arc-starting structure includes a columnar outer peripheral surface 211, a first conical surface 212, and an electrode end surface 213 connected sequentially from near to far from the housing 100. The first conical surface 212 tapers from the end connected to the columnar outer peripheral surface 211. The second arc-starting structure includes a first columnar inner peripheral surface 311, a second conical surface 312, and a second columnar inner peripheral surface 313 connected sequentially from near to far from the housing 100. The second conical surface 312 tapers from the end connected to the first columnar inner peripheral surface 311. The gap between the first and second arc-starting structures is precisely designed to ensure uniform electric field distribution and efficient excitation of the working gas to form plasma.

[0074] The perimeter wind plasma generator in this embodiment adopts a high-frequency arc initiation method. Through an external high-frequency arc initiator, ignition is first performed between the columnar outer peripheral surface 211 of the first electrode body 210 and the first columnar inner peripheral surface 311 of the second electrode body 310, ionizing and conducting the working gas in the arc initiation cavity to form an electric arc. Then, driven by the working gas, the arc root of the first electrode body 210 moves from the columnar outer peripheral surface 211 through the first conical surface 212 and finally stabilizes at the center of the electrode end face 213. The arc root of the second electrode body 310 moves downstream from the first columnar inner peripheral surface 311 to the second conical surface 312 and the second columnar inner peripheral surface 313, and finally balances on the second columnar inner peripheral surface 313 near the opening of the arc channel 300a.

[0075] like Figure 3As shown, in another embodiment of this application, the inner wall surface of the arc channel 300a further includes a third conical surface 314, a third columnar inner peripheral surface 315, a fourth conical surface 316, and a fourth columnar inner peripheral surface 317, which are connected sequentially from near to far from the end of the second columnar inner peripheral surface 313 away from the second conical surface 312, according to their distance from the housing 100. The third conical surface 314 gradually narrows from the end connected to the second columnar inner peripheral surface 313, and the fourth conical surface 316 gradually widens from the end connected to the third columnar inner peripheral surface 315. The second electrode body 310 with this structure is more suitable for application in the fields of pulverized coal ignition and waste gas treatment.

[0076] like Figure 4 As shown, the second electrode body 310 includes an arc-starting electrode 310c and an output electrode 310d. The arc-starting electrode 310c and the output electrode 310d can be connected in various ways, such as detachable connection methods such as threaded connection or threaded fastener connection, or fixed connection methods such as welding. No limitation is made here.

[0077] exist Figure 4 In the embodiment shown, the inner wall surface of the end of the arc-starting electrode 310c away from the output electrode 310d is a second arc-starting structure. The inner wall surface of the end of the output electrode 310d connected to the arc-starting electrode 310c is composed of a third conical surface 314, a third columnar inner circumferential surface 315, a fourth conical surface 316, and a fourth columnar inner circumferential surface 317. Of course, in other embodiments, the inner wall surface of the output electrode 310d can also be a complete columnar inner circumferential surface, and there is no limitation on 310c and 310d here.

[0078] As will be readily understood by those skilled in the art, the perimeter wind plasma generator in this application embodiment requires the flow of coolant and working gas during operation. Therefore, sealing structures are respectively provided at the joints between the inner sleeve 133, the isolation layer 120, and the inner shell 110 near the coolant flow channel and the working gas flow channel 100d, at the connection between the first electrode assembly 200 and the inner shell 110, and at the connection between the second electrode assembly 300 and the outer shell 130, for sealing purposes. Each sealing structure includes one or more sealing rings.

[0079] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0080] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0081] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0082] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A perimeter wind plasma generator, characterized in that, include: The shell (100) is provided with a working gas flow channel (100d); The first electrode assembly (200) is disposed in the housing (100); The second electrode assembly (300) is disposed in the housing (100) insulated from the first electrode assembly (200). The second electrode assembly (300) is axially hollow inside to form an arc channel (300a) and is sleeved on the outside of the first electrode assembly (200). A swirl ring (400) is disposed between the working gas flow channel (100d) and the electric arc channel (300a). The swirl ring (400) has a plurality of vent holes evenly distributed in the circumferential direction. The working gas flow channel (100d) and the electric arc channel (300a) are connected through the vent holes. The center line of the vent holes is inclined relative to the axis of the swirl ring (400) and does not pass through the axis of the swirl ring (400). The perimeter wind assembly (500) includes a perimeter wind sleeve (510) and a perimeter wind ring (520). One end of the perimeter wind sleeve (510) is connected to the housing (100) and sleeved outside the second electrode assembly (300). A first flow gap (500a) is formed between the perimeter wind sleeve (510) and the second electrode assembly (300). One end of the first flow gap (500a) is connected to the working gas flow channel (100d), and the other end forms a perimeter wind outlet around the end of the arc channel (300a) away from the housing (100). The perimeter wind ring (520) is disposed in the first flow gap (500a). The perimeter wind ring (520) has a plurality of perimeter wind holes evenly distributed along the circumference. The center line of the perimeter wind holes is inclined relative to the axis of the perimeter wind ring (520) and does not pass through the axis of the perimeter wind ring (520).

2. The perimeter wind plasma generator according to claim 1, characterized in that, The housing (100) is provided with a coolant inlet channel (100a), a coolant outlet channel (100c), and a coolant connecting channel (100b). The first electrode assembly (200) is provided with a first electrode cooling channel. The inlet end of the first electrode cooling channel is connected to the coolant inlet channel (100a), and the outlet end of the first electrode cooling channel is connected to the inlet end of the coolant connecting channel (100b). The second electrode assembly (300) is provided with a second electrode cooling channel. The inlet end of the second electrode cooling channel is connected to the outlet end of the coolant connecting channel (100b), and the outlet end of the second electrode cooling channel is connected to the coolant outlet channel (100c).

3. The perimeter wind plasma generator according to claim 2, characterized in that, The housing (100) includes an inner shell (110), an isolation layer (120), and an outer shell (130) sequentially fitted from the inside out. The inner shell (110) and the outer shell (130) are insulated from each other by the isolation layer (120). The first electrode assembly (200) is disposed in the inner shell (110), and the second electrode assembly (300) is disposed in the outer shell (130). The coolant inlet channel (100a) is disposed in the inner shell (110), and the coolant outlet channel (100c) and the working gas channel (100d) are disposed in the outer shell (130). The inner shell (110), the isolation layer (120), and the outer shell (130) together form the coolant connecting channel (100b).

4. The perimeter wind plasma generator according to claim 2, characterized in that, The first electrode assembly (200) includes a first electrode body (210) and a cooling inner tube (220). The first electrode body (210) is sleeved on the outside of the first end of the cooling inner tube (220), and a second flow gap (200a) is formed between the inner wall surface of the first electrode body (210), the outer tube wall of the cooling inner tube (220), and the first end face. The second flow gap (200a) communicates with the cavity of the cooling inner tube (220) to form the first electrode cooling channel. The second end of the cooling inner tube (220) serves as the inlet end of the first electrode cooling channel and communicates with the coolant inlet channel (100a). The end of the second flow gap (200a) away from the first end of the cooling inner tube (220) serves as the outlet end of the first electrode cooling channel and communicates with the inlet end of the coolant communication channel (100b).

5. The perimeter wind plasma generator according to claim 4, characterized in that, The outer wall surface of the first electrode body (210) away from the housing (100) is a first arc-starting structure. The first arc-starting structure includes a columnar outer peripheral surface (211), a first conical surface (212), and an electrode end surface (213) connected in sequence from near to far from the housing (100). The first conical surface (212) gradually tapers from the end connected to the columnar outer peripheral surface (211).

6. The perimeter wind plasma generator according to claim 5, characterized in that, The second electrode assembly (300) includes a second electrode body (310) and a cooling jacket (320). The interior of the second electrode body (310) is axially hollow to form the arc channel (300a). The cooling jacket (320) is fitted over the second electrode body (310), and a third flow passage (300b) is formed between the cooling jacket (320) and the second electrode body (310). A fourth flow passage (300c) is provided inside the cooling jacket (320). The third flow passage (300b) is far from the arc channel. The end of the third flow gap (300b) near the housing (100) is connected to the end of the fourth flow gap (300c) away from the housing (100) to form the second electrode cooling channel. The end of the third flow gap (300b) near the housing (100) serves as the inlet end of the second electrode cooling channel and is connected to the outlet end of the coolant communication channel (100b). The end of the fourth flow gap (300c) near the housing (100) serves as the outlet end of the second electrode cooling channel and is connected to the coolant outlet channel (100c).

7. The perimeter wind plasma generator according to claim 6, characterized in that, The cooling jacket (320) includes an inner sleeve (321) and an outer sleeve (322). The inner sleeve (321) is fitted onto the second electrode body (310), and the outer sleeve (322) is fitted onto the inner sleeve (321). The gap between the inner sleeve (321) and the second electrode body (310) is the third flow gap (300b), and the gap between the outer sleeve (322) and the inner sleeve (321) is the fourth flow gap (300c).

8. The perimeter wind plasma generator according to claim 7, characterized in that, One or more sets of support bosses (310a) are provided between the second electrode body (310) and the inner sleeve (321) and / or between the second electrode body (310) and the outer sleeve (322), and each set of support bosses (310a) includes at least two support bosses (310a) evenly distributed along the circumference.

9. The perimeter wind plasma generator according to claim 6, characterized in that, The inner wall surface of the arc channel (300a) near the end of the housing (100) is a second arc-starting structure. The second arc-starting structure is sleeved outside the first arc-starting structure. The second arc-starting structure includes a first columnar inner circumferential surface (311), a second conical surface (312), and a second columnar inner circumferential surface (313) connected in order from near to far from the housing (100). The second conical surface (312) gradually tapers from the end connected to the first columnar inner circumferential surface (311).

10. The perimeter wind plasma generator according to claim 9, characterized in that, The inner wall of the arc channel (300a) also includes a third conical surface (314), a third columnar inner peripheral surface (315), a fourth conical surface (316), and a fourth columnar inner peripheral surface (317) connected sequentially from near to far from the housing (100) to the end of the second columnar inner peripheral surface (313) away from the second conical surface (312). The third conical surface (314) gradually narrows from the end connected to the second columnar inner peripheral surface (313), and the fourth conical surface (316) gradually expands from the end connected to the third columnar inner peripheral surface (315).

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