阅读说明：本技术 一种大气压毛细管内均匀放电微等离子体发生装置 (Uniform discharge micro-plasma generating device in atmospheric pressure capillary tube ) 是由 刘东平 朱迪 于 2020-03-06 设计创作，主要内容包括：本发明公开了一种大气压毛细管内均匀放电微等离子体发生装置,包括依次连接的固定架、上盖、介质管、底座、气室、通气变径,所述介质管的外表面覆盖有地电极,所述介质管的内部设有毛细管Ⅰ,所述毛细管Ⅰ依次穿过底座、介质管、上盖至固定架的内部；所述通气变径、气室的内部设有毛细管Ⅱ,所述毛细管Ⅱ的内部设有高压电极,所述高压电极依次穿过气室、底座、毛细管Ⅰ、固定架。本发明结构简单、操作方便。本发明系统可以在毛细管内产生均匀的等离子体,装置体积小、能耗低而且放电产生的电子密度高,活性物种密度大,可用于医用微小导管型器械的灭菌处理,达到快速、高效、无污染的灭菌目的。(The invention discloses a micro-plasma generating device for uniform discharge in an atmospheric pressure capillary tube, which comprises a fixing frame, an upper cover, a medium tube, a base, an air chamber and a ventilating reducer, wherein the fixing frame, the upper cover, the medium tube, the base, the air chamber and the ventilating reducer are sequentially connected; the ventilation reducing air chamber is characterized in that a capillary tube II is arranged inside the air chamber, a high-voltage electrode is arranged inside the capillary tube II, and the high-voltage electrode sequentially penetrates through the air chamber, the base, the capillary tube I and the fixing frame. The invention has simple structure and convenient operation. The system can generate uniform plasma in the capillary, has small device volume, low energy consumption, high electron density generated by discharge and high active species density, can be used for the sterilization treatment of medical tiny conduit type instruments, and achieves the aim of rapid, efficient and pollution-free sterilization.)

1. A micro-plasma generating device for uniform discharge in an atmospheric pressure capillary is characterized by comprising a fixing frame, an upper cover, a medium pipe, a base, an air chamber and ventilation reducing pipes which are connected in sequence,

the medium tube is of a hollow structure with openings at two ends, the outer surface of the medium tube is covered with a ground electrode, a capillary tube I is arranged inside the medium tube and is of a hollow structure with openings at two ends, and the capillary tube I sequentially penetrates through the base, the medium tube and the upper cover to the inside of the fixing frame;

a capillary II is arranged in the ventilation reducing air chamber, and is of a hollow structure with one end closed and the other end open;

and a high-voltage electrode is arranged in the capillary II and sequentially penetrates through the air chamber, the base, the capillary I and the fixing frame.

2. The micro-plasma generating device for uniform discharge in the atmospheric capillary according to claim 1, wherein the nozzle at one end of the medium tube is positioned inside the upper cover, and the nozzle at the other end of the medium tube is positioned inside the base; the pipe orifice at one end of the capillary I is positioned inside the fixing frame, and the pipe orifice at the other end of the capillary I is positioned inside the base; and the pipe orifice at one end of the capillary tube II is positioned in the air chamber, and the pipe orifice at the other end is positioned outside the ventilation reducing pipe.

3. The micro-plasma generating device for uniform discharge in the atmospheric capillary according to claim 1, wherein the medium tube, the base, the upper cover and the ventilation reducing tube are connected in an insertion manner.

4. The micro-plasma generating device for uniform discharge in an atmospheric capillary according to claim 1, wherein a threaded hole is formed at the circumference of the lower surface of the base, a through hole corresponding to the threaded hole of the base is formed at the circumference of the gas chamber, and the base and the gas chamber are fastened and connected by a screw.

5. The atmospheric-pressure capillary uniform-discharge microplasma generating device of claim 1, wherein said high-voltage electrode is connected to a high-voltage power supply through a high-voltage wire.

6. The micro-plasma generating apparatus for uniform discharge in an atmospheric pressure capillary according to claim 1, wherein the ground electrode is grounded through a ground line.

7. The micro-plasma generating device for uniform discharge in an atmospheric capillary according to claim 1, wherein a sealing ring is provided between the base and the gas chamber.

8. The micro-plasma generating device for uniform discharge in an atmospheric capillary according to claim 1, wherein the capillary I, the capillary II, the medium tube, the base, the air chamber and the upper cover are made of insulating materials; the high-voltage electrode and the ground electrode are made of conductive materials.

9. The atmospheric-pressure capillary internal uniform discharge microplasma generation device according to claim 4, wherein the high-voltage power supply is a high-voltage AC power supply or a high-voltage pulsed DC power supply, the high-voltage AC power supply has a frequency of 1 to 100kHz and a voltage peak of 0 to 50kV, and the high-voltage pulsed DC power supply has a frequency of 1 to 20kHz and a voltage peak of 0 to 100 kV.

10. The micro-plasma generating device for uniform discharge in an atmospheric pressure capillary according to claim 4 or 7, wherein the screw is made of an insulating material; the sealing ring is made of nitrile, silica gel or fluorine gel.

Technical Field

The invention relates to a discharge device, in particular to a plasma discharge device in a capillary.

Background

To date, treated reusable endoscopes are considered highly sterile, but not sterile, and the catheters are disposed of after only one use, with great wastage. Since these medical instruments contain temperature sensitive components, they cannot be treated with dry heat or moist heat, and they require a long exhaust time in addition to being harmful to the environment due to a long contact time with chemicals of up to 10 hours when using chemical disinfectants. The non-toxic, rapid and low-temperature plasma technology is applied to the sterilization of small medical instruments such as a single-cavity micro catheter, and has very wide application prospect. The plasma generated in the capillary has higher electron density and energy density compared with the traditional atmospheric pressure low-temperature plasma. The higher electron density and energy density have high application value. However, such single lumen microcatheter devices are characterized by small internal diameter and relatively long length, such high aspect ratios make it difficult for the sterilizing species to reach the various parts of the device, and thus the sterilization process cannot be guaranteed to be completely reliable. Thus, the ability to generate uniform microplasmas within a microcatheter is a prerequisite for applications in medical devices for sterilization of the interior surface of stenotic catheters.

Disclosure of Invention

Based on the above background art, the present invention is directed to provide a microplasma generating device which has a simple structure, is convenient to maintain and apply, and can generate uniform discharge in a capillary tube with a micron size.

In order to realize the purpose, the following technical scheme is adopted:

a micro-plasma generating device for uniform discharge in an atmospheric pressure capillary belongs to a micro-plasma system and comprises a fixing frame, an upper cover, a medium pipe, a base, an air chamber and ventilation reducing pipes which are connected in sequence,

the medium tube is of a hollow structure with openings at two ends, the outer surface of the medium tube is covered with a ground electrode, a capillary tube I is arranged inside the medium tube and is of a hollow structure with openings at two ends, and the capillary tube I sequentially penetrates through the base, the medium tube and the upper cover to the inside of the fixing frame;

a capillary II is arranged in the ventilation reducing air chamber, and is of a hollow structure with one end closed and the other end open; the part II of the capillary tube penetrates through the ventilation pipe and is reduced in diameter;

and a high-voltage electrode is arranged in the capillary II and sequentially penetrates through the air chamber, the base, the capillary I and the fixing frame.

Further, the high-voltage electrode is in a wire shape or a rod shape and is coaxially arranged inside the capillary I.

Furthermore, the inner diameter and the outer diameter of the capillary tube I are respectively smaller than those of the medium tube.

Furthermore, the center of the base and the center of the upper cover are both provided with through holes with diameters larger than the diameter of the capillary tube I, and the periphery of the through hole on the upper surface of the base is provided with grooves with inner diameters smaller than the inner diameter of the medium tube and outer diameters larger than the outer diameter of the medium tube.

Furthermore, the pipe orifice at one end of the medium pipe is positioned inside the upper cover, and the pipe orifice at the other end of the medium pipe is positioned inside the base.

Furthermore, the mouth of pipe of I one end of capillary is located the inside of mount, and the mouth of pipe of the other end is located the inside of base.

Furthermore, the pipe orifice at one end of the capillary tube II is positioned inside the air chamber, and the pipe orifice at the other end of the capillary tube II is positioned outside the ventilation reducing pipe.

Furthermore, the medium pipe, the base, the upper cover, the ventilation reducing pipe, the capillary I and the capillary II are fixedly connected.

Furthermore, the medium pipe, the base, the upper cover, the ventilation reducing pipe, the capillary I and the capillary II are connected in an inserting mode.

Furthermore, the upper cover is fixedly connected with the fixing frame.

Furthermore, the upper cover is adhered to the fixing frame.

Furthermore, one end of the high-voltage electrode is located inside the capillary II, and the other end of the high-voltage electrode is located outside the fixing frame.

Further, a sealing ring is arranged between the base and the air chamber.

Furthermore, a groove for nesting the sealing ring is formed in the lower surface of the base and the upper surface of the air chamber.

Further, the groove is an annular groove.

Furthermore, threaded holes are formed in the circumference of the lower surface of the base, through holes corresponding to the threaded holes of the base are formed in the circumference of the air chamber, and the base and the air chamber are connected through screws in a fastening mode.

Further, the high-voltage electrode is communicated with a high-voltage power supply through a high-voltage wire.

Further, the high-voltage power supply is a high-voltage alternating current power supply or a high-voltage pulse direct current power supply, the frequency of the alternating current power supply is 1-100 kHz, the voltage peak value is 0-50 kV, the frequency of the pulse direct current power supply is 1-20 kHz, and the voltage peak value is 0-100 kV.

Furthermore, the ventilation reducing holes are provided with ventilation reducing holes for connecting the capillary II to the air chamber through the ventilation reducing holes.

Further, the ground electrode is grounded through a ground line.

Furthermore, the capillary tube and the medium tube are made of insulating materials.

Furthermore, the capillary tube and the medium tube are made of quartz.

Furthermore, the base, the air chamber and the upper cover are made of insulating materials.

Furthermore, the base, the air chamber and the upper cover are made of polytetrafluoroethylene.

Further, the high voltage electrode and the ground electrode are made of conductive materials.

Further, the high voltage electrode and the ground electrode are metal or conductive films.

Further, the metal is stainless steel wire.

Further, the conductive film is an ITO conductive film.

Furthermore, the sealing ring is made of nitrile, silica gel or fluorine gel.

Furthermore, the screw is made of an insulating material.

Furthermore, the screw is made of nylon or acrylic. The base is used for fixing the capillary tube I and the medium tube in a coaxial mode, the capillary tube I is inserted into a through hole in the center of the base, and the medium tube is inserted into a groove in the center of the base; the base and the air chamber are extruded through a sealing ring and are fastened at the periphery by screws; the upper cover is used for fixing the capillary tube I and the medium tube on the other side corresponding to the base; the fixing frame is used for fixing one end of the high-voltage electrode, and the other end of the high-voltage electrode is sleeved in the capillary II; the ventilation reducing pipe is used for introducing working gas into the system and fixing a high-voltage electrode sleeved into the capillary II. Install hollow structure's capillary I in the through-hole of base, install hollow structure's medium pipe in the recess of base, the mouth of pipe of medium pipe flushes with the recess internal surface of base. A high-voltage electrode is arranged in the capillary tube I, and a ground electrode is wound on the outer surface of the medium tube; the upper cover is sleeved on the other side of the capillary I and the other side of the medium tube which are coaxially arranged, so that the pipe orifice of the capillary I is higher than the surface of the upper cover, and the pipe orifice of the medium tube is flush with the inner surface of the groove of the upper cover.

The working process of the invention is roughly as follows:

the two electrodes are respectively used as a high-voltage electrode and a ground electrode to be electrified, working gas (helium, argon and neon) is transmitted to the ventilation reducing pipe through the gas pipe, then transmitted to the gas chamber through the ventilation reducing pipe and finally transmitted into the capillary I, and through the series of transmission processes, the purpose that the gas flow of the gas from the gas cylinder can ventilate the capillary I more stably is achieved, and uniform discharge is generated in the capillary I.

In addition, the inner diameter and the outer diameter of the capillary I and the medium tube, the material of the high-voltage electrode and the ground electrode and the like are used as variable parameters, and if the parameters are changed, uniform discharge in capillaries with different sizes can be realized.

The invention has the beneficial effects that: the invention has simple structure and convenient operation. The system can generate uniform plasma in the capillary, has small device volume, low energy consumption, high electron density generated by discharge and high active species density, can be used for the sterilization treatment of medical tiny conduit type instruments, and achieves the aim of rapid, efficient and pollution-free sterilization.

Drawings

Fig. 1 is a cross-sectional view of the general structure of the present invention.

FIG. 2 is a schematic view of the assembled discharge reactor main body of the high voltage electric wire, the connecting wire, the high voltage electrode, the ground electrode, the capillary tube I, the capillary tube II and the medium tube of the present invention.

Fig. 3 is a schematic structural view of the assembled fixing frame and upper cover of the present invention, wherein a is a top view and b is a bottom view.

Fig. 4 is a schematic structural diagram of the base of the present invention, wherein a is a top view and b is a bottom view.

FIG. 5 is a schematic view of the structure of the gas cell of the present invention.

Fig. 6 is a schematic front view of the base, the air chamber, and the ventilation reducing assembly of the present invention, wherein a is the base, b is the air chamber, and c is the ventilation reducing assembly.

In the figure: 1-high voltage wire, 2-high voltage electrode, 3-fixed mount, 4-upper cover, 5-capillary I, 6-medium tube, 7-ground electrode, 8-grounding wire, 9-base, 10-O type sealing ring, 11-air chamber, 12-screw, 13-ventilation reducing, 14-capillary II, 15-threaded hole, 16-through hole I, 17-through hole II, 18-groove I, 19-through hole III, 20-groove II, 21-groove III, 22-through hole IV, 23-bulge, 24-through hole V, 25-through hole VI, 26-groove IV, 27-ventilation reducing hole, 28-ventilation reducing large-caliber side, 29-ventilation reducing small-caliber side, 30-fixed disc, 31-fixed claw, 32-fixed disk, 33-vent joint.

Detailed description of the preferred embodiments

The invention is further described below with reference to the accompanying drawings.