阅读说明：本技术 一种可变磁场约束的等离子体射流装置及其方法 (Plasma jet device with variable magnetic field constraint and method thereof ) 是由 李冰妍 于 2021-08-05 设计创作，主要内容包括：本发明公开了一种可变磁场约束的等离子体射流装置及其方法,包括等离子体射流装置,所述等离子体射流装置包括高压射频发生器、安装在所述高压射频发生器上气体供应管、高压射频发生器侧壁柔性管、以及安装在所述柔性管末端的等离子体发生器；还包括可变开端约束机构、用于调节可变开端约束机构的调节机构,以及联动调节机构的联动机构；本发明主要由等离子发生的等离子体射流装置、产生约束力的可变开端约束机构、用于调节磁场约束力的调节机构以及联动机构组成,可变开端约束机构可实现对等离子射流产生约束力,提高了射流的精准度,实现的对而实现的对等离子射流的缩放功能,在特定地点具有很好的微调节功能。(The invention discloses a plasma jet device and a method thereof with variable magnetic field constraint, comprising a plasma jet device, wherein the plasma jet device comprises a high-voltage radio-frequency generator, a gas supply pipe arranged on the high-voltage radio-frequency generator, a flexible pipe on the side wall of the high-voltage radio-frequency generator and a plasma generator arranged at the tail end of the flexible pipe; the variable start-up restraining mechanism is used for restraining the variable start-up restraining mechanism; the variable start-up restraining mechanism can generate restraining force on the plasma jet, improves the jet accuracy, realizes the scaling function of the plasma jet, and has a good fine adjustment function in a specific place.)

1. A variable magnetic field confining plasma jet apparatus, characterized by: the plasma jet device (100) comprises a high-voltage radio-frequency generator (102), a gas supply pipe (103) arranged on the high-voltage radio-frequency generator (102), a flexible pipe (104) on the side wall of the high-voltage radio-frequency generator (102), and a plasma generator (101) arranged at the tail end of the flexible pipe (104); a central electrode (106) for discharging plasma jet, an insulating sealing body (105) for sealing the central electrode (106), a gas flow outlet (107) which penetrates through the flexible pipe (104) and is communicated with the gas supply pipe (103), and a plasma ejection part (108) which is arranged at the bottom of the plasma generator (101) are arranged in the plasma generator (101); the variable-start restraining mechanism (200), an adjusting mechanism (300) for adjusting the variable-start restraining mechanism (200), and a linkage mechanism (400) for linking the adjusting mechanism (300) are further included;

the variable start-end constraint mechanism (200) is arranged in the inner cavity of the plasma generator (101) and is positioned at the lower end of the central electrode (106), and the bottom end of the variable start-end constraint mechanism (200) extends to the plasma emission part (108);

the adjusting mechanism (300) is positioned at the side of the variable start-up constraint mechanism (200) and is installed in the plasma generator (101), and the adjusting mechanism (300) can control the motion track and the intensity of a magnetic induction line in the variable start-up constraint mechanism (200);

the linkage mechanism (400) is connected with the bottom of the adjusting mechanism (300), and the linkage mechanism (400) is used for fixing the magnetic induction line generating mechanism in the limiting variable start-up restraining mechanism (200).

2. A variable magnetic field confining plasma jet apparatus as claimed in claim 1, wherein: the variable start constraint mechanism (200) is configured as a first constraint mechanism (210); the first restraint mechanism (210) comprises a tube body (211) positioned right below the central electrode (106), a middle coil (212) wound on the outer wall of the tube body (211), an upper coil (213 a) and a pre-adjusting coil (214) positioned above the middle coil (212), and a lower coil (213 b) positioned at the middle coil (212); the pre-adjusting coil (214), the upper coil (213 a), the middle coil (212) and the lower coil (213 b) are arranged in a single wire body and are electrified;

the winding pitches of the upper coil (213 a), the lower coil (213 b) and the pre-adjusting coil (214) are consistent, and the winding pitches of the upper coil (213 a), the lower coil (213 b) and the pre-adjusting coil (214) are 3-5 times smaller than that of the middle coil (212);

the lengths of the upper coil (213 a) and the lower coil (213 b) are the same, the length of the pre-adjusting coil (214) is greater than that of the upper coil (213 a) and the lower coil (213 b), and the length of the middle coil (212) is greater than 3 times that of the lower coil (213 b).

3. A variable magnetic field confining plasma jet apparatus as claimed in claim 1, wherein: the variable start constraint mechanism (200) is configured as a second constraint mechanism (220); the second constraint mechanism (220) comprises an upper guide ring (221) and a lower guide ring (222) which is located below the upper guide ring (221) and has the same specification, the upper guide ring (221) is arranged right below the central pivot electrode (106), the upper guide ring (221) and the lower guide ring (222) are electrified correspondingly, a fixed clamping seat (223) is installed on the side wall of the upper guide ring (221) and fixedly connected to the inner wall of the plasma generator (101), and the lower guide ring (222) is connected with the inner wall of the plasma generator (101) in a vertical sliding mode.

4. A variable magnetic field confining plasma jet apparatus as claimed in claim 2, wherein: the linkage mechanism (400) is arranged between the upper coil (213 a) and the pre-conditioning coil (214), and the airflow outlet (107) is arranged above the tube body (211).

5. A variable magnetic field confining plasma jet apparatus as claimed in claim 3, wherein: the linkage mechanism (400) is arranged on the side of the lower guide ring (222), a guide rail (224) is installed on one side, away from the linkage mechanism (400), of the lower guide ring (222), and the guide rail (224) is installed on the inner wall of the plasma generator (101).

6. A variable magnetic field confining plasma jet apparatus as claimed in any one of claims 1 to 5, characterized in that: the adjusting mechanism (300) comprises a straight rod (301) connected with a linkage mechanism (400), a connecting rod (302) movably connected to the top end of the straight rod (301) through a pin shaft, and a pressing plate (303) installed at the tail end of the connecting rod (302), wherein the pressing plate (303) is arranged on the outer side of the plasma generator (101), and a wedge-shaped hole for the movement of the connecting rod (302) is formed in the side wall of the plasma generator (101);

the outer wall cover of straight-bar (301) is equipped with reset spring (305), and the outer wall cover of straight-bar (301) is equipped with spacing guide pin bushing (304), the top fixed connection straight-bar (301) of reset spring (305) and the spacing guide pin bushing (304) of bottom butt of reset spring (305), insulating seal body (105) of straight-bar (301) run-through swing joint.

7. A variable magnetic field confining plasma jet apparatus as claimed in any one of claims 1 to 5, characterized in that: the linkage mechanism (400) comprises a transverse open-shaped fixing part (401), a round rod (402) fixedly connected with the side wall of the fixing part (401), a frame body (403) sleeved on the outer wall of the round rod (402), an extension rod (405) integrally formed with the tail end of the round rod (402), and a first electromagnetic valve component (404) which is arranged on the side wall of an inner cavity of the frame body (403) and matched with the tail end of the extension rod (405);

the outer wall of the extension rod (405) is provided with a fixing sleeve (406), the fixing sleeve (406) is fixedly installed in the frame body (403), and a second electromagnetic valve component (407) and a sleeve spring (408) are installed on one side, away from the first electromagnetic valve component (404), of the fixing sleeve (406).

8. A variable magnetic field confining plasma jet apparatus as claimed in claim 7, wherein: the electromagnetic adsorption part of the second electromagnetic valve component (407) is arranged at the tail end of the round rod (402), and the sleeve spring (408) is sleeved on the outer wall of the extension rod (405) and is abutted against the tail end surface of the round rod (402).

9. A variable magnetic field confining plasma jet apparatus as claimed in claim 6, wherein: at least two buttons (303 a) are installed on the pressing plate (303), and the buttons (303 a) are correspondingly and electrically connected with the first electromagnetic valve component (404) and the second electromagnetic valve component (407).

10. Use of a variable magnetic field confining plasma jet device as claimed in any one of claims 1-5, characterized by the following method steps:

the method comprises the following steps: generating plasma jet, wherein an oscillation signal which can be generated by a high-voltage radio frequency generator (102) in a plasma jet device (100) is subjected to power amplification and boosting coupling to output high-frequency alternating-current high voltage to break down working gas, a central electrode (106) in the plasma generator (101) generates plasma, and meanwhile, a gas supply pipe (103) can emit gas for the plasma to generate jet;

step two: the plasma jet flow is adjusted, a pressure plate (303) of an adjusting mechanism (300) can be pressed downwards or pulled upwards, a straight rod (301) and a linkage mechanism (400) at the bottom end can be driven to move upwards or downwards, a reset spring (305) compresses and resets, a first electromagnetic valve component (404) and a second electromagnetic valve component (407) in the linkage mechanism (400) are powered off in a normal state, a fixing part (401) can fix a variable start-end constraint mechanism (200), after the first electromagnetic valve component (404) and the second electromagnetic valve component (407) are powered on, the fixing part (401) can move away from the variable start-end constraint mechanism (200) through linkage of a round rod (402), and then the linkage mechanism (400) can be controlled through a button on the pressure plate (303), fixing and separation of the variable start-end constraint mechanism (200) can be realized, so that the magnetic force position in the variable start-end constraint mechanism (200) is changed, the guiding strength of the magnetic induction lines can be adjusted, and the magnetic field restraining force of plasma jet in the plasma generator (101) can be further changed;

step three: and (3) emitting the plasma jet, wherein the gas flow outlet (107) is communicated with the gas supply pipe (103) through the flexible pipe (104), and the gas flow outlet (107) can perform gas injection operation on the plasma, so that the emitted plasma jet is discharged from the plasma emitting part (108) to emit a restrained jet.

Technical Field

The invention relates to the technical field of plasma, in particular to a plasma jet device and a plasma jet method capable of changing magnetic field constraint.

Background

The plasma jet is an important application form of plasma, and has excellent application prospects in the fields of material modification, surface treatment, plasma chemistry, plasma medical treatment and the like. In conventional use, energy is preferentially transferred to electrons rather than heavy particles by adjusting an external electric field and a magnetic field, and the transferred energy is transferred to the heavy particles through collision of electrons to excite ionization, thereby generating highly active substances. The low gas pressure allows the mean free path of electrons to be increased and thus sufficient energy to be obtained. In practice, an external excitation source is used, and after plasma is generated in a limited cavity, the generated plasma is blown out of a discharge cavity by using air flow, so that plasma jet is formed.

However, the conventional plasma jet device is not provided with an external controllable magnetic field, the directionality of the micro-beam generated by the plasma jet without control and restriction is poor, the plasma is not restricted and controlled to change through the magnetic field at the present stage, and meanwhile, the restriction force of the magnetic field cannot be changed.

Disclosure of Invention

The invention provides a plasma jet device with variable magnetic field constraint and a method thereof, aiming at overcoming the defects of difficult magnetic field constraint and control in the prior art. The plasma jet device and the method thereof with variable magnetic field constraint have good constraint force on plasma jet, can realize the change of the control effect on the constraint force of the plasma jet by controlling the change of the magnetic induction lines, and are beneficial to the use of the plasma jet.

In order to achieve the purpose, the invention provides the following technical scheme: a plasma jet device with variable magnetic field restriction comprises a plasma jet device, wherein the plasma jet device comprises a high-voltage radio-frequency generator, a gas supply pipe arranged on the high-voltage radio-frequency generator, a high-voltage radio-frequency generator side wall flexible pipe and a plasma generator arranged at the tail end of the flexible pipe; a central electrode for discharging plasma jet, an insulating sealing body for sealing the central electrode, an airflow outlet which penetrates through the flexible pipe and is communicated with the gas supply pipe, and a plasma ejection part which is arranged at the bottom of the plasma generator are arranged in the plasma generator; the variable start-up restraining mechanism is used for restraining the variable start-up restraining mechanism;

the variable start-end constraint mechanism is arranged in the inner cavity of the plasma generator and is positioned at the lower end of the central electrode, and the bottom end of the variable start-end constraint mechanism extends to the plasma ejection part;

the adjusting mechanism is positioned on the side of the variable start-end constraint mechanism and is arranged in the plasma generator, and the adjusting mechanism can control the motion trail and the intensity of the magnetic induction lines in the variable start-end constraint mechanism;

the linkage mechanism is connected with the bottom of the adjusting mechanism and is used for fixing the magnetic induction line generating mechanism in the limiting variable start-end constraint mechanism.

Preferably, the variable-start constraint mechanism is provided as a first constraint mechanism; the first constraint mechanism comprises a tube body positioned right below the central electrode, a middle coil wound on the outer wall of the tube body, an upper coil and a pre-regulation coil positioned above the middle coil, and a lower coil positioned in the middle coil; the pre-adjusting coil, the upper coil, the middle coil and the lower coil are arranged in a single wire body and are electrified;

the winding space of the upper coil, the lower coil and the pre-adjusting coil is consistent, and the winding space of the upper coil, the lower coil and the pre-adjusting coil is 3-5 times smaller than that of the middle coil;

the length of the upper coil and the length of the lower coil are the same, the length of the pre-adjusting coil is larger than that of the upper coil and that of the lower coil, and the length of the middle coil is larger than 3 times that of the lower coil.

Based on the above, the upper coil, the lower coil and the pre-adjusting coil in the first restraint mechanism are reasonably wound, the linkage mechanism can move the coil of the pre-adjusting coil downwards or away to the upper coil, and correspondingly increase or decrease the number of the coils of the upper coil to adjust the magnetic force of the magnetic field region of the upper coil, so that the change of the restraint force of the plasma jet magnetic force is achieved.

Preferably, the variable-start constraint mechanism is provided as a second constraint mechanism; the second restraint mechanism comprises an upper diversion ring and a lower diversion ring with the same specification and positioned below the upper diversion ring, the upper diversion ring is arranged under the central electrode, the upper diversion ring and the lower diversion ring are correspondingly electrified, a fixing clamping seat is installed on the side wall of the upper diversion ring and fixedly connected to the inner wall of the plasma generator, and the lower diversion ring is vertically and slidably connected to the inner wall of the plasma generator.

Based on the above, the structure of the second restraint mechanism is reasonable, and in actual operation, the magnetic induction strength between the upper guide ring and the lower guide ring is correspondingly changed by changing the distance between the upper guide ring and the lower guide ring, so that the magnetic field restraint force of plasma jet in the plasma generator can be changed, and the position of the plasma jet emitted by the plasma generator is more accurate.

Preferably, the linkage mechanism is arranged between the upper coil and the pre-conditioning coil, and the air flow outlet is arranged above the tube body.

Based on the above, the adjustment mechanism can adjust the plasma jet confinement force through the linkage of the linkage mechanism.

Preferably, the linkage mechanism is arranged on the side of the lower guide ring, a guide rail is arranged on one side, away from the linkage mechanism, of the lower guide ring, and the guide rail is arranged on the inner wall of the plasma generator.

Based on the above, the up-and-down movement of the lower guide ring becomes more stable through the installation of the guide rail.

Preferably, the adjusting mechanism comprises a straight rod connected with the linkage mechanism, a connecting rod movably connected to the top end of the straight rod through a pin shaft, and a pressing plate mounted at the tail end of the connecting rod, the pressing plate is arranged on the outer side of the plasma generator, and a wedge-shaped hole for the connecting rod to move is formed in the side wall of the plasma generator;

the outer wall cover of straight-bar is equipped with reset spring, and the outer wall cover of straight-bar is equipped with spacing guide pin bushing, reset spring's top fixed connection straight-bar and the spacing guide pin bushing of bottom butt of reset spring, the insulating seal of straight-bar through formula swing joint.

Based on the above, adjustment mechanism's whole adopts mechanical mode, carries out the linkage and adjusts, and the fault rate is low, and it is convenient to use.

Preferably, the linkage mechanism comprises a transverse open-shaped fixing part, a round rod fixedly connected with the side wall of the fixing part, a frame body sleeved on the outer wall of the round rod, an extension rod integrally formed with the tail end of the round rod, and a first electromagnetic valve component arranged on the side wall of the inner cavity of the frame body and matched with the tail end of the extension rod;

the outer wall of the extension rod is provided with a fixing sleeve, the fixing sleeve is fixedly installed in the frame body, and a second electromagnetic valve component and a sleeve spring are installed on one side, away from the first electromagnetic valve component, of the fixing sleeve.

Based on the above, the linkage mechanism is reasonable in structural arrangement, the fixing portion can move away from the variable start-up constraint mechanism through linkage of the round rod, the linkage mechanism can be controlled through the button on the pressing plate, and fixing and separation of the variable start-up constraint mechanism can be achieved.

Preferably, the electromagnetic absorption portion of the second solenoid valve assembly is provided at a distal end of the round rod, and the cover spring is fitted over an outer wall of the extension rod and abuts against a distal end surface of the round rod.

Based on the above, the structural installation position of the sleeve spring is reasonable, and the first electromagnetic valve component and the second electromagnetic valve component can play a good reset function after working.

Preferably, the pressing plate is provided with at least two buttons, and the buttons are correspondingly and electrically connected with the first electromagnetic valve component and the second electromagnetic valve component.

Based on the above, the pressure plate can directly control the first electromagnetic valve component and the second electromagnetic valve component, so that the constraint force outside the magnetic field of the jet flow can be conveniently adjusted.

Preferably, the method also comprises the following steps:

the method comprises the following steps: generating plasma jet, wherein an oscillation signal which can be generated by a high-voltage radio frequency generator in the plasma jet device is subjected to power amplification and boosting coupling to output high-frequency alternating-current high voltage to break down working gas, a central electrode in the plasma generator generates plasma, and meanwhile, a gas supply pipe can emit gas for the plasma to generate jet;

step two: the plasma jet flow is adjusted, a pressing plate of an adjusting mechanism can be pressed downwards or pulled upwards, a straight rod and a linkage mechanism at the bottom end can be driven to move upwards or downwards, a reset spring is compressed and reset, a first electromagnetic valve component and a second electromagnetic valve component in the linkage mechanism are powered off in a normal state, a variable start-end constraint mechanism can be fixed by a fixing part, after the first electromagnetic valve component and the second electromagnetic valve component are powered on, the fixing part can move away from the variable start-end constraint mechanism through linkage of a round rod, and then the linkage mechanism can be controlled through a button on the pressing plate, so that the fixing and the separation of the variable start-end constraint mechanism can be realized, the magnetic force position in the variable start-end constraint mechanism is changed, the guiding strength of a magnetic induction line can be adjusted, and the magnetic field constraint force of the plasma jet flow in a plasma generator can be changed;

step three: and the air outlet is connected with the air supply pipe through a flexible pipe and can spray air to the plasma, so that the guided plasma jet is discharged from the plasma emission part to emit a constrained jet.

Based on the above, the plasma jet device with the variable magnetic field constraint has the advantages of simple overall control step flow, easiness in operation and the like in actual operation.

Compared with the prior art, the invention has the beneficial effects that: the plasma jet device mainly comprises a plasma jet device for generating plasma, a variable start-up constraint mechanism for generating constraint force, an adjusting mechanism for adjusting magnetic field constraint force and a linkage mechanism, the whole structure is reasonably arranged, the variable start-up constraint mechanism can realize the generation of the constraint force on the plasma jet, the defects that the plasma jet has poor directionality and is difficult to jet to a specified position are avoided, the jet accuracy is improved, and the using effect is improved; meanwhile, through the arrangement of the adjusting mechanism, the plasma jet zooming function is realized by changing the change of the magnetic induction line of the plasma jet, the fine adjusting function is realized at a specific place, further, the requirement of people on the accuracy of the plasma jet is met, and then the plasma jet can be restrained and controlled to achieve an ideal using effect, so that the plasma jet can be used in a special environment.

Drawings

Fig. 1 is a schematic view of the overall structure of the plasma jet apparatus of the present invention.

Fig. 2 is a schematic diagram of the first confinement mechanism and the plasma motion trajectory according to the present invention.

Fig. 3 is a schematic diagram of a second confinement mechanism and a plasma motion trajectory according to the present invention.

Fig. 4 is a schematic structural diagram of the adjusting mechanism of the present invention.

Fig. 5 is an enlarged view of the invention at a in fig. 1.

Fig. 6 is an enlarged view of the invention at b in fig. 4.

Reference numbers in the figures: 100. a plasma jet device; 101. a plasma generator; 102. a high voltage radio frequency generator; 103. a gas supply pipe; 104. a flexible tube; 105. an insulating seal body; 106. a central electrode; 107. an airflow outlet; 108. a plasma emission part; 200. a variable start-up constraint mechanism; 210. a first restraint mechanism; 211. a pipe body; 212. a middle coil; 213a, upper coil; 213b, lower coil; 214. a preconditioning coil; 220. a second restraint mechanism; 221. an upper flow guide ring; 222. a lower flow guide ring; 223. fixing the card holder; 224. a guide rail; 300. an adjustment mechanism; 301. a straight rod; 302. a connecting rod; 303. pressing a plate; 303a, a button; 304. a limiting guide sleeve; 305. a return spring; 400. a linkage mechanism; 401. a fixed part; 402. a round bar; 403. a frame body; 404. a first solenoid valve assembly; 405. an extension pole; 406. fixing a sleeve; 407. a second solenoid valve assembly; 408. and (5) sleeving a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The traditional plasma jet device is not provided with an external controllable magnetic field, the micro-beam generated by the plasma jet without control and restriction has poor directivity, the plasma is not restricted and controlled to change through the magnetic field at the present stage, and simultaneously the restriction force of the magnetic field can not be changed and is single, so that the generated plasma is difficult to be restricted and controlled to achieve an ideal effect.

Example 1

Referring to fig. 1, 2, 4, 5 and 6, the present invention provides a technical solution: the embodiment provides a plasma jet device constrained by a variable magnetic field, which has the advantages that the number relationship between the upper coil 211a and the pre-adjusting coil 214 in the first constraining mechanism 210 is utilized, the tightness degree is utilized, the plasma jet can be well constrained, and the change of the magnetic induction line can be controlled to realize the change of the control effect on the constraint force of the plasma jet;

referring to fig. 1 and 2, the present invention includes a plasma jet apparatus 100, the plasma jet apparatus 100 includes a high voltage rf generator 102, a gas supply pipe 103 installed on the high voltage rf generator 102, a flexible pipe 104 installed on a side wall of the high voltage rf generator 102, and a plasma generator 101 installed at a terminal of the flexible pipe 104; a central electrode 106 for discharging plasma jet flow, an insulating sealing body 105 for sealing the central electrode 106, wherein the insulating sealing body 105 can be made of polytetrafluoroethylene, a gas flow outlet 107 which penetrates through the flexible pipe 104 and is communicated with the gas supply pipe 103, and a plasma ejection part 108 which is arranged at the bottom of the plasma generator 101; the power supply for generating plasma is a DC/AC (direct current/alternating current) converter, and the working process of the converter is to convert 9V direct current voltage into high-frequency (40-80 kHz) high-voltage (600-1800V) alternating current. The switch is an input end of a start/stop control signal of the oscillating circuit, the oscillating circuit starts to work after receiving the signal, generates an oscillating signal with the frequency of 40-80 kHz and sends the oscillating signal into the modulation circuit, and a PWM excitation pulse signal is generated and sent to the direct current conversion circuit, so that the direct current conversion circuit generates controllable direct current voltage to supply power for the Royer driving circuit. A power tube, a peripheral capacitor C1 and a boosting transformer winding L1 (equivalent to an inductor) form a self-excited oscillation circuit, generated oscillation signals are subjected to power amplification and boosting coupling, high-frequency alternating-current high voltage is output, working gas is broken down, and plasma is generated in the plasma generator 101; air or an inert gas may be used as the working gas in the gas supply pipe 103. It can be used in various fields including material modification, surface treatment, plasma chemistry, sterilization, and biomedical applications.

Based on the above, the variable start-up restraining mechanism 200, the adjusting mechanism 300 for adjusting the variable start-up restraining mechanism 200 by the variable start-up restraining mechanism 200, and the linkage mechanism 400 for linking the adjusting mechanism 300 are further included; the plasma jet emitted from the plasma jet device 100 can be restrained by the variable-start restraining mechanism 200, the variable-start restraining mechanism 200 is disposed in the inner cavity of the plasma generator 101 and is located at the lower end of the center electrode 106, and the bottom end of the variable-start restraining mechanism 200 extends to the plasma emitting portion 108; the adjusting mechanism 300 is located at the side of the variable start-up constraining mechanism 200 and is installed in the plasma generator 101, the adjusting mechanism 300 can control the guiding strength of the magnetic induction lines in the variable start-up constraining mechanism 200, the linkage mechanism 400 is connected with the bottom of the adjusting mechanism 300, the linkage mechanism 400 is used for fixing and limiting the magnetic induction line generating mechanism in the variable start-up constraining mechanism 200, the magnetic induction line generating mechanism and the magnetic induction generating mechanism in the variable start-up constraining mechanism 200 are arranged, the linkage mechanism 400 is located between the upper coil 213a and the pre-adjusting coil 214, and the air outlet 107 is arranged above the tube body 211.

As shown in fig. 1 and 5, in the present invention, the adjusting mechanism 300 includes a straight rod 301 connected to the linkage mechanism 400, a connecting rod 302 movably connected to the top end of the straight rod 301 through a pin, and a pressing plate 303 installed at the end of the connecting rod 302, the pressing plate 303 is disposed outside the plasma generator 101, a wedge-shaped hole for the connecting rod 302 to move is formed in the side wall of the plasma generator 101, and the connecting rod 302 can move correspondingly in the wedge-shaped hole;

specifically, the outer wall cover of straight-bar 301 is equipped with reset spring 305, reset spring 305 can ensure the reset work of straight-bar 301, the outer wall cover of straight-bar 301 is equipped with spacing guide pin bushing 304, reset spring 305's top fixed connection straight-bar 301 and the spacing guide pin bushing 304 of bottom butt of reset spring 305, straight-bar 301 run-through swing joint insulating seal 105, adjustment mechanism 300's whole sets up rationally, press down or stir the clamp plate 303 of adjustment mechanism 300 upwards through pressing in the plasma generator 101 outside, can realize the regulation work to the upper and lower position of link gear 400, then can adjust the direction intensity of variable beginning restraint mechanism 200's magnetic induction line.

As shown in fig. 4 and 6, in the present invention, the linkage mechanism 400 includes a laterally open-mouthed fixing portion 401, the fixing portion 401 can clamp the pre-adjusting coil 214 and move to the upper coil 213a, a round bar 402 fixedly connected to a side wall of the fixing portion 401, a frame 403 sleeved on an outer wall of the round bar 402, an extension bar 405 integrally formed with a distal end of the round bar 402, and a first solenoid valve assembly 404 mounted on a side wall of an inner cavity of the frame 403 and matched with a distal end of the extension bar 405; the outer wall of the extension rod 405 is provided with a fixing sleeve 406, the fixing sleeve 406 is fixedly installed in the frame body 403, and a second solenoid valve assembly 407 and a sleeve spring 408 are installed on the side of the fixing sleeve 406 away from the first solenoid valve assembly 404.

Specifically, the electromagnetic absorption portion of the second electromagnetic valve assembly 407 is disposed at the end of the round rod 402, the sleeve spring 408 is sleeved on the outer wall of the extension rod 405 and abuts against the end surface of the round rod 402, the sleeve spring 408 can improve the reset effect, at least two buttons 303a are mounted on the pressing plate 303, the buttons 303a are electrically connected to the first electromagnetic valve assembly 404 and the second electromagnetic valve assembly 407 correspondingly, the pressing plate 303 can directly control the first electromagnetic valve assembly 404 and the second electromagnetic valve assembly 407, so as to adjust the constraint force outside the magnetic field of the jet flow, and the first electromagnetic valve assembly 404 and the second electromagnetic valve assembly 407 can be correspondingly controlled by pressing the corresponding buttons 303a, thereby controlling the extension rod 405 to extend and retract in the frame 403.

Based on the above, the variable-start restraining mechanism 200 is provided as the first restraining mechanism 210; the first confinement mechanism 210 includes a tube 211 directly below the center electrode 106, a middle coil 212 wound around an outer wall of the tube 211, an upper coil 213a and a pre-conditioning coil 214 above the middle coil 212, and a lower coil 213b at the middle coil 212; the pre-conditioning coil 214, the upper coil 213a, the middle coil 212, and the lower coil 213b are provided in a single wire body and energized; the preconditioning coil 214, the upper coil 213a, the middle coil 212, and the lower coil 213b are energized to create a magnetic field in the body 211 that traces magnetic lines of influence, as shown in fig. 2, in which the plasma jet is directed to create a magnetic confinement force on the plasma jet.

It can be seen that the first restraint mechanism 210 is wound around a straight tube 211 using a plurality of turns, and the turns at both ends are denser than those at the middle. If the current intensity is the same for each turn of the coil, the magnetic field must be stronger at both ends of the tube than in the middle. Thus, a particle that precesses around the magnetic field lines, once it enters the strong magnetic field region of the nozzle, is subjected to a magnetic force that pushes it back. For the plasma jet to be emitted, this force will force it to slow down the precession speed and to confine it.

It should be noted that: the winding spacing of the upper coil 213a, the lower coil 213b and the pre-adjusting coil 214 is consistent, and the winding spacing of the upper coil 213a, the lower coil 213b and the pre-adjusting coil 214 is smaller than 3-5 times of that of the middle coil 212; the lengths of the upper coil 213a and the lower coil 213b are the same, the length of the pre-adjusting coil 214 is larger than that of the upper coil 213a or the lower coil 213b, the length of the middle coil 212 is larger than 3 times that of the lower coil 213b, and the upper coil 213a, the lower coil 213b and the pre-adjusting coil 214 are wound reasonably; meanwhile, the adjusting mechanism 300 can realize the up-and-down movement of the linkage mechanism 400, the linkage mechanism 400 can move the coils of the pre-adjusting coil 214 downwards or away to the upper coil 213a, and correspondingly increase or decrease the number of the coils of the upper coil 213a to adjust the magnetic force of the magnetic field region of the upper coil 213a, so as to change the magnetic force constraint force of the plasma jet.

In the actual operation process, plasma jet is generated, an oscillation signal which can be generated by a high-voltage radio frequency generator 102 in the plasma jet device 100 is subjected to power amplification and boosting coupling, high-frequency alternating current high voltage is output, working gas is broken down, and plasma is generated by a central electrode 106 in a plasma generator 101; the adjustment of the plasma jet can be realized by pressing down or shifting up the pressing plate 303 of the adjusting mechanism 300, can drive the straight rod 301 and the linkage mechanism 400 at the bottom end to move upwards, and can correspondingly adjust the guiding position of the magnetic induction lines of the variable-start restraining mechanism 200, so that the magnetic induction lines outside the plasma jet do contraction or scattering movement, and further the magnetic field restraining force of the plasma jet in the plasma generator 101 can be changed; synchronously controlling the first electromagnetic valve assembly 404 and the second electromagnetic valve assembly 407, controlling the extension rod 405 to extend and retract in the frame 403, and enabling the fixing part 401 to clamp the pre-adjusting coil 214 and move to the upper coil 213a through the linkage of the straight rod 301 in the adjusting mechanism 300, otherwise, enabling the coil of the upper coil 213a to move to the upper pre-adjusting coil 21; the gas flow outlet 107 is operable to inject gas into the plasma so as to discharge the plasma jet after the plasma jet is discharged from the plasma discharge portion 108.

Example 2

Referring to fig. 1, 3, 4, 5 and 6, the present invention provides a technical solution: the structures of the plasma jet device 100, the variable-start confinement mechanism 200, the adjustment mechanism 300 for adjusting the variable-start confinement mechanism 200, and the linkage mechanism 400 linking the adjustment mechanism 300 are the same as those of the plasma jet device 100 and the linkage mechanism 400 linking the adjustment mechanism 300 of embodiment 1.

Except that the variable-start constraint mechanism 200 is provided as a second constraint mechanism 220; the second constraint mechanism 220 includes an upper deflector ring 221 and a lower deflector ring 222 with the same specification and located below the upper deflector ring 221, the upper deflector ring 221 is disposed under the center electrode 106, the upper deflector ring 221 and the lower deflector ring 222 are correspondingly energized, the sidewall of the upper deflector ring 221 is installed with a fixed clamping seat 223 and fixedly connected to the inner wall of the plasma generator 101, the lower deflector ring 222 is slidably connected to the inner wall of the plasma generator 101 up and down, a magnetic field can be generated between the energized upper deflector ring 221 and the lower deflector ring 222, the magnetic force lines between the upper deflector ring 221 and the lower deflector ring 222 are as shown in fig. 3, and the plasma jet is emitted from top to bottom, can be constrained by the force in the magnetic force lines, so as to form constraint on the plasma jet, avoid poor jet accuracy of the plasma, wide emission range and poor directivity, and through the arrangement of the second constraint mechanism 220, can carry out the efflux to the assigned position, improve the fluidic precision, improve the result of use.

Further, the linkage mechanism 400 is arranged on the side of the lower deflector ring 222, the guide rail 224 is installed on one side of the lower deflector ring 222 away from the linkage mechanism 400, the guide rail 224 is installed on the inner wall of the plasma generator 101, and the installation of the guide rail 224 facilitates the horizontal and stable up-and-down movement adjustment work of the lower deflector ring 222.

Meanwhile, through the arrangement of the adjusting mechanism 300 and referring to fig. 3, the plasma jet effect of variable magnetic field restriction is realized by changing the relative position of the upper guide ring 221 and the lower guide ring 222 and the upper and lower positions of the lower guide ring 222 and further changing the position change of the magnetic induction line outside the plasma jet, so that the plasma jet has a good fine adjustment function in a specific place, the requirement of people on the accuracy of the plasma jet is further met, the restriction control on the plasma can be realized to achieve an ideal use effect, the plasma jet can be used in a special environment, and various special occasions such as material modification, surface treatment, plasma chemistry, sterilization, biomedical application and the like are facilitated.

In the actual operation process, plasma jet is generated, an oscillation signal which can be generated by the high-voltage radio-frequency generator 102 in the plasma jet device 100 is subjected to power amplification and boosting coupling, high-frequency alternating-current high voltage is output, working gas is punctured, plasma is generated by the center electrode 106 in the plasma generator 101, adjustment of the plasma jet can be achieved, the straight rod 301 and the linkage mechanism 400 at the bottom end can be driven to move upwards or downwards by adjusting the pressing plate 303 in the adjusting mechanism 300, the reset spring 305 is compressed and reset, adjustment of the upper position and the lower position of the linkage mechanism 400 can be achieved, and then the magnetic induction line position of the variable start-end constraining mechanism 200 and the guiding direction of the plasma jet can be adjusted. During control, the first solenoid valve assembly 404 and the second solenoid valve assembly 407 in the linkage mechanism 400 are powered off in a normal state, the fixing portion 401 can fix the variable start-up constraining mechanism 200, and after the first solenoid valve assembly 404 and the second solenoid valve assembly 407 are powered on, the fixing portion 401 can move away from the variable start-up constraining mechanism 200 through linkage of the round rod 402, so that the linkage mechanism 400 can be controlled through the buttons on the pressing plate 303, fixing and separating of the variable start-up constraining mechanism 200 can be realized, further, the magnetic position in the variable start-up constraining mechanism 200 is changed, the distance between the upper guide ring 221 and the lower guide ring 222 is enabled to be close to or away from each other, the magnetic induction strength between the upper guide ring 221 and the lower guide ring 222 is correspondingly changed, the guiding strength of the magnetic induction lines of the variable start-up constraining mechanism 200 can be correspondingly adjusted, and further, the magnetic field environment of plasma jet in the plasma generator 101 can be changed, the magnetic induction lines outside the plasma jet flow do contraction or dispersion movement to complete the work of the plasma variable magnetic field constraint; the airflow outlet 107 can spray air to the plasma, so that the plasma is guided out of the jet flow after being emitted from the plasma emitting part 108, the position of the plasma jet flow emitted by the plasma emitting part is more accurate, the plasma jet flow has a good fine adjustment function in a specific place, the requirement of people on the accuracy of the plasma jet flow is further met, the plasma can be restrained and controlled to achieve an ideal using effect, the plasma jet flow can be zoomed, and the plasma jet flow can be used in a special environment.

Compared with embodiment 1, the second constraining mechanism 220 of embodiment 2 adopts two upper and lower closed guide rings (the upper guide ring 221 and the lower guide ring 222) to generate magnetic force lines to constrain the plasma jet, and only the position of the lower guide ring 222 is needed to be changed for adjusting the motion trajectory of the magnetic force lines and the intensity of the magnetic field, and the stress constraining effect in the magnetic force lines is changed by controlling the distance between the upper guide ring 221 and the lower guide ring 222, and compared with embodiment 1, the control is more convenient and rapid, and the working motion is stable and reliable, so embodiment 2 is preferred.

In conclusion, the plasma jet device mainly comprises a plasma jet device for generating plasma, a variable start-up constraint mechanism for generating constraint force, an adjusting mechanism for adjusting magnetic field constraint force and a linkage mechanism, the overall structure is reasonably arranged, the variable start-up constraint mechanism can generate constraint force on plasma jet, the defects that the plasma jet is poor in directivity and difficult to jet to a specified position are overcome, the jet accuracy is improved, and the using effect is improved; meanwhile, through the arrangement of the adjusting mechanism, the plasma jet zooming function is realized by changing the change of the magnetic induction line of the plasma jet, the fine adjusting function is realized at a specific place, further, the requirement of people on the accuracy of the plasma jet is met, and then the plasma jet can be restrained and controlled to achieve an ideal using effect, so that the plasma jet can be used in a special environment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.