阅读说明：本技术 螺旋引弧式电极及非高频等离子切割枪头 (Spiral arc-striking type electrode and non-high-frequency plasma cutting gun head ) 是由 朱雪峰 周志需 程龙兵 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种螺旋引弧式电极及非高频等离子切割枪头,切割枪头的中心杆设在枪头主体内部,中心杆与枪头主体之间设有绝缘件,中心杆和电极外周设有涡流环,进气铜管连接在枪头主体上,电极头部与中心杆底部为平面接触连接,割嘴连接在电极尾部,涡流环顶部与绝缘件接触连接,涡流环底部与割嘴接触连接；电极包括电极本体,电极本体具有头部、中间连接部和尾部,中间连接部外表面沿着周向设置有螺旋叶片状引弧槽。通过上述方式,本发明螺旋引弧式电极及非高频等离子切割枪头采用螺旋叶片结构的电极,表面积成倍增加,散热加倍,电极与中心杆平面接触导电,简单实用,枪头内部整体气流往复流动,充分带走整个枪头热量,极大提高电极寿命。(The invention discloses a spiral arc-striking type electrode and a non-high-frequency plasma cutting gun head.A central rod of the cutting gun head is arranged in a gun head main body, an insulating part is arranged between the central rod and the gun head main body, vortex rings are arranged on the peripheries of the central rod and the electrode, an air inlet copper pipe is connected on the gun head main body, the head part of the electrode is in plane contact connection with the bottom of the central rod, a cutting nozzle is connected at the tail part of the electrode, the top part of the vortex ring is in contact connection with the insulating part, and the bottom part of the vortex ring is in contact connection with the cutting nozzle; the electrode comprises an electrode body, the electrode body is provided with a head part, an intermediate connecting part and a tail part, and the outer surface of the intermediate connecting part is provided with a spiral blade-shaped arc striking groove along the circumferential direction. Through the mode, the spiral arc-striking type electrode and the non-high-frequency plasma cutting gun head adopt the electrode with the spiral blade structure, the surface area is multiplied, the heat dissipation is doubled, the electrode is in plane contact with the central rod for conducting electricity, the electrode is simple and practical, the whole air flow in the gun head flows in a reciprocating mode, the heat of the whole gun head is fully taken away, and the service life of the electrode is greatly prolonged.)

1. A spiral arc ignition electrode, comprising: the electrode body is provided with a head part, a middle connecting part and a tail part, and the outer surface of the middle connecting part is provided with a spiral blade-shaped arc-striking groove along the circumferential direction.

2. The spiral arc ignition type electrode according to claim 1, wherein the head portion, the intermediate connecting portion and the tail portion of the electrode body are all arranged in a cylindrical shape, and the height ratio of the head portion to the tail portion to the intermediate connecting portion to the tail portion is 1: 4.5-5.8:4.8-6.2.

3. The spiral arc ignition electrode of claim 2 wherein the ratio of the height of the head, intermediate connecting portion and tail portion is 1: 5.5:6.

4. The spiral arc ignition electrode according to claim 1, wherein the spiral blade of the outer circumferential surface of the intermediate connection part is a constant diameter spiral blade.

5. The spiral arc ignition electrode of claim 4 wherein the ratio of the diameters of the tail, constant diameter spiral blade and head is 1: 1.6-2.0: 1-1.2.

6. The spiral arc ignition electrode of claim 5 wherein the ratio of the diameters of the tail, constant diameter spiral blade and head is 1: 1.84: 1.06.

7. the spiral arc ignition type electrode according to claim 1, wherein the head portion is transitionally joined with the intermediate connecting portion through a step slope, and the intermediate connecting portion is transitionally joined with the tail portion through an arc.

8. A non-high frequency plasma cutting torch head comprising: the torch head comprises a torch head main body, an insulating part, a central rod, an electrode, a cutting nozzle and an air inlet copper pipe, wherein the central rod is arranged in a cavity in the torch head main body, the insulating part is arranged between the central rod and the torch head main body, vortex rings are arranged on the peripheries of the central rod and the electrode, the air inlet copper pipe is connected to one side of the torch head main body,

the electrode is a spiral arc ignition type electrode as claimed in any one of claims 1 to 7, the head of the electrode body is directly connected with the bottom of the center rod in a planar contact manner, the cutting nozzle is connected with the tail of the electrode body, the top of the vortex ring is connected with the insulating part in a contact manner, and the bottom of the vortex ring is connected with the cutting nozzle in a contact manner.

9. A non-high frequency plasma cutting torch head according to claim 8, wherein the insulating member has a vertical bore for gas flow therethrough, the swirl ring has a dispersion bore in the base for gas flow therethrough,

the gas flows into the space between the insulating part and the gun head main body through the gas inlet copper pipe, flows to the outer edge of the bottom of the vortex ring through the vertical hole of the insulating part, then flows into the electrode and the cutting nozzle from the dispersion hole of the vortex ring,

the gas flow is divided into an upward gas flow and a downward gas flow, the upward gas flow can open the electrode body and drive the central rod to move upwards so as to separate the electrode body from the cutting torch for arc striking, and the downward gas flow blows the plasma arc out of the cutting torch to form a cutting arc.

10. The non-high frequency plasma cutting torch head of claim 9 wherein the head of the electrode body and the intermediate connection with the spiral vane-shaped arc chute are all located within the interior cavity of the swirl ring and upward gas flow passes through the spiral vane-shaped arc chute.

Technical Field

The invention relates to the technical field of plasma, in particular to a spiral arc striking type electrode and a non-high-frequency plasma cutting gun head.

Background

As shown in figure 1, after a conventional non-high frequency plasma cutting gun is inserted into a plasma cutting machine, gas flows in from a gas pipe (9 ') and reaches the middle of an electrode (2 ') and a cutting nozzle (1 '), the gas flow acts on the lower part of a piston (6 ') to push a central rod (7 ') to move upwards so as to drive the electrode (2 ') and the cutting nozzle (1 ') to separate and start arc, and plasma arc is formed.

The high-frequency plasma gun head structure and the working mode mainly have the following defects:

1) the heat dissipation area of the electrode is small:

the whole structure of the electrode is cylindrical, the surface area of the electrode is small, and the obviously enlarged heat dissipation area is not provided. The electrode is used as a consumable material frequently used in the plasma cutting gun, and the surface area is too small, so that the heat dissipation is poor, and the service life is seriously influenced.

2) The electrode needs to be screwed into a center rod, and the center rod needs to prevent the rotation mechanism:

the electrode and the center rod are in contact conduction and adopt a thread fixing mode, the electrode needs to be screwed on the center rod by a wrench, and meanwhile, the gun head needs to be provided with a center rod anti-rotation structure, so that the structure is complex.

3) The air flow is single from top to bottom:

the gas enters the lower part of the piston from the central rod, pushes the piston upwards, flows outwards from the air hole, enters the middle of the cutting nozzle and the electrode from the vortex ring at the bottom of the protective cap, and is finally sprayed out from the cutting nozzle. The gas flow direction is single, and the reciprocating motion is avoided, so that the whole gun head cannot be fully cooled.

Disclosure of Invention

The invention mainly solves the technical problem of providing a spiral arc-striking type electrode and a non-high-frequency plasma cutting gun head, the electrode with a spiral blade structure is adopted, the surface area is increased in multiples, the heat dissipation is doubled, the heat of the whole gun head can be fully taken away, the service life of the electrode is greatly prolonged, and meanwhile, the electrode is in plane contact with a central rod for conducting electricity, so that the structure of the gun head is simplified.

In order to solve the technical problems, the invention adopts a technical scheme that: there is provided a spiral ignition type electrode comprising: the electrode body is provided with a head part, a middle connecting part and a tail part, and the outer surface of the middle connecting part is provided with a spiral blade-shaped arc-striking groove along the circumferential direction.

In a preferred embodiment of the present invention, the head portion, the intermediate connecting portion, and the tail portion of the electrode body are all disposed in a cylindrical shape, and a height ratio of the head portion to the intermediate connecting portion to the tail portion is 1: 4.5-5.8:4.8-6.2.

In a preferred embodiment of the present invention, the ratio of the height of the head portion, the intermediate connecting portion and the tail portion is 1: 5.5:6.

In a preferred embodiment of the present invention, the spiral blade of the outer peripheral surface of the intermediate connecting portion is a constant diameter spiral blade.

In a preferred embodiment of the present invention, the ratio of the diameters of the tail portion, the constant diameter helical blade and the head portion is 1: 1.6-2.0: 1-1.2.

In a preferred embodiment of the present invention, the ratio of the diameters of the tail portion, the constant diameter helical blade and the head portion is 1: 1.84: 1.06.

in a preferred embodiment of the present invention, the head portion and the intermediate connecting portion are transitionally joined by a step slope, and the intermediate connecting portion and the tail portion are transitionally joined by an arc.

In order to solve the technical problem, the invention adopts another technical scheme that: there is provided a non-high frequency plasma cutting torch head comprising: the electrode is a spiral arc ignition type electrode, the head of the electrode body is directly in plane contact with the bottom of the central rod, the cutting torch is connected to the tail of the electrode body, the top of the vortex ring is in contact connection with the insulating piece, and the bottom of the vortex ring is in contact connection with the cutting torch.

In a preferred embodiment of the invention, the insulating part is provided with vertical holes for gas to flow through, the bottom of the swirl ring is provided with dispersion holes for gas to flow through,

the gas flows into between the insulating part and the gun head main body through the gas inlet copper pipe, flows to the outer edge of the bottom of the vortex ring through the vertical hole of the insulating part, then flows into the electrode and the cutting torch from the dispersion hole of the vortex ring, the gas flow is divided into upward gas flow and downward gas flow, the upward gas flow can prop open the electrode body and drive the central rod to move upwards, so that the electrode body and the cutting torch are separated to perform arc striking, and the downward gas flow blows the plasma arc out of the cutting torch to form cutting arc.

In a preferred embodiment of the invention, the head of the electrode body and the intermediate connecting part with the spiral blade-shaped arc-leading groove are all positioned in the inner cavity of the vortex ring, and upward gas flows pass through the spiral blade-shaped arc-leading groove when flowing upwards.

The invention has the beneficial effects that: the spiral arc-leading type electrode and the non-high-frequency plasma cutting gun head adopt the electrode with the spiral blade structure, so that the surface area is increased by times, and the heat dissipation is doubled; meanwhile, the electrode is in plane contact with the central rod for conducting electricity, other tools are not needed for installation, and an anti-rotation structure is not needed for the central rod of the gun head, so that the structure of the gun head is simplified; the whole air flow of the gun head flows back and forth from top to bottom and from bottom to top, so that the heat of the whole gun head is fully taken away, and the service life of the electrode is greatly prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic diagram of a preferred embodiment of a non-HF plasma torch head of the prior art;

FIG. 2 is a schematic structural view of a preferred embodiment of a non-HF plasma torch head according to the present invention;

FIG. 3 is a schematic diagram of a preferred embodiment of an electrode in the non-high frequency plasma cutting torch head of the present invention;

FIG. 4 is a schematic view of the electrode-center rod connection in a non-high frequency plasma cutting torch head according to the present invention;

FIG. 5 is a schematic structural view of a preferred embodiment of a swirl ring in the non-high frequency plasma cutting torch head of the present invention;

FIG. 6 is a schematic structural view of a preferred embodiment of an insulator in the non-HF plasma cutting torch head of the present invention;

FIG. 7 is a schematic diagram of the flow of gas in a preferred embodiment of the non-high frequency plasma cutting torch head of the present invention;

the parts in the drawings are numbered as follows: 1 ', a cutting nozzle, 2 ', an electrode, 3 ', a vortex ring, 4 ', a protective cap, 5 ', an external polymer material, 6 ', a piston, 7 ', a center rod, 8 ', an insulating piece, 9 ' and an air pipe;

1. the cutting torch comprises a cutting nozzle, 2, an electrode, 210, an electrode body, 211, a head, 212, an intermediate connecting part, 213, a tail part, 214, a spiral blade-shaped arc striking groove, 3, a vortex ring, 310, first scattering holes, 4, an insulating part, 410, vertical holes, 420, second scattering holes, 5, a torch head main body, 6, a center rod, 7 and an air inlet copper pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.

Referring to fig. 2 to 7, an embodiment of the present invention includes:

example one

A spiral arc ignition electrode comprising: the electrode body 210, the electrode body 210 has a head portion 211, an intermediate connecting portion 212 and a tail portion 213.

The head 211, the middle connecting part 212 and the tail 213 of the electrode body 210 are connected into a whole to form an integrated part, the head 211 and the middle connecting part 212 are in transition connection through a step inclined plane, and the middle connecting part 212 and the tail 213 are in transition connection through an arc.

The outer surface of the intermediate connection part 213 is provided with a spiral blade-shaped arc-striking groove 214 along the circumferential direction, the surface area of the spiral blade is multiplied relative to the surface area of the cylinder, the heat dissipation is also doubled, the heat of the electrode can be taken away greatly, and the service life of the consumable is prolonged greatly.

The head 211, the middle connecting part 212 and the tail 213 of the electrode body 210 are all arranged in a cylindrical shape, and the height ratio of the head 211, the middle connecting part 212 and the tail 213 is 1: 4.5-5.8:4.8-6.2, the height of the whole spiral blade-shaped arc-leading groove 214 is matched with that of the middle connecting part 212, so that the heat dissipation area can be fully increased without increasing the volume of the electrode.

Specifically, in some preferred embodiments, the height ratio of the head 211, the intermediate connection 212, and the tail 213 may be 1: 5.5:6.

The helical blade on the outer peripheral surface of the intermediate connecting part 212 is an equal-diameter helical blade, so that the heat dissipation area can be increased under the condition that the internal space of the gun head is not occupied, and the diameter ratio of the tail part 213 to the equal-diameter helical blade to the head part 211 is 1: 1.6-2.0: 1-1.2.

Specifically, in some preferred embodiments, the ratio of the diameters of the tail 213, constant diameter helical blade, and head 211 is 1: 1.84: 1.06.

example two

A non-high frequency plasma cutting torch head comprising: the cutting torch comprises a torch head main body 5, wherein an insulating part 4, a central rod 6, an electrode 2 and a cutting torch 1 are arranged in the torch head main body 5, and one side of the torch head main body 5 is also connected with an air inlet copper pipe 7.

Further, a center rod 6 is arranged in a cavity inside the gun head main body 5, an insulating part 4 is arranged between the center rod 6 and the gun head main body 5, the head 211 and the tail 213 of the electrode 2 are respectively connected with the center rod 6 and the cutting torch 1, a vortex ring 3 is arranged on the periphery of the center rod 6 and the electrode 2, the top of the vortex ring 3 is in contact connection with the insulating part 4 through a step surface, and the bottom of the vortex ring 3 is in contact connection with the cutting torch 1 through a step surface.

In this embodiment, the electrode 2 is a spiral arc-striking electrode in the first embodiment, that is, a spiral blade-shaped arc-striking groove 214 is formed on the electrode body.

Specifically, the head 211 of the electrode body 210 and the intermediate connecting portion 212 having the spiral blade-shaped arc-striking groove 214 are all located in the inner cavity of the swirl ring 3, and upward airflow passes through the spiral blade-shaped arc-striking groove 214 when flowing upward, so that the surface area can be greatly increased, the airflow can fully take away heat, and the service life of the electrode is prolonged.

Furthermore, the head 211 of the electrode body 210 is in plane contact with the bottom of the central rod 6 directly for conducting electricity, threaded connection is not needed, installation is carried out by means of other tools, an anti-rotation structure is not needed in the central rod of the gun head, the structure of the gun head is simplified, and the use is convenient.

The working process of the non-high-frequency plasma spiral arc striking type cutting gun head comprises the following steps:

the gas flows into the space between the insulating part 4 and the gun head main body 5 from the air inlet copper pipe 7, flows to the outer edge of the bottom of the vortex ring 3 through the vertical hole 410 of the insulating part 4, then flows inwards into the electrode 2 and the cutting nozzle 1 from the first dispersion hole 310 of the vortex ring 3, and then is divided into two flows, one is upward gas flow, and the other is downward gas flow, as shown by the arrows in fig. 7:

the upward airflow can push the electrode body 210 upwards and drive the central rod 6 to move upwards, so that the electrode body 210 is separated from the cutting torch 1 for arc striking;

the downward airflow can flow downwards to blow the plasma arc out of the cutting nozzle 1 to form a cutting arc;

the gas flowing from the spiral blade-shaped arc ignition groove 214 of the electrode body 210 carries away a large amount of heat and then flows upwards into the air through the second dispersion holes 420 of the insulating member 4;

the air flow in the whole gun head realizes reciprocating flow, can reach any corner of the gun head, and leads the air flow to reach more places and take away more heat compared with a single top-down flow mode, thereby accelerating the cooling of the gun head.

The spiral arc-striking type electrode and the non-high-frequency plasma cutting gun head have the beneficial effects that:

the electrode with the helical blade structure is adopted, so that the surface area is multiplied, and the heat dissipation is doubled; meanwhile, the electrode is in plane contact with the central rod for conducting electricity, other tools are not needed for installation, and an anti-rotation structure is not needed for the central rod of the gun head, so that the structure of the gun head is simplified;

the whole air flow of the gun head flows back and forth from top to bottom and from bottom to top, so that the heat of the whole gun head is fully taken away, and the service life of the electrode is greatly prolonged.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.