CN210024076U - Energy centralized plasma arc cutting torch - Google Patents

Abstract

The utility model discloses a centralized plasma arc cutting torch of energy, it includes that nozzle and cover establish the outside safety cover of nozzle, and the spout has been seted up to the bottom of nozzle, and the venthole has been seted up to the bottom of safety cover corresponding spout, and the spout is linked together with the venthole, and the space between the outer wall of nozzle and the inner wall of safety cover constitutes the protection air chamber, has seted up supplementary gas pocket on the lateral wall of nozzle, and supplementary gas pocket and venthole all are linked together with the protection air chamber, and the axis of supplementary gas pocket is parallel to each other with the axis of spout. The utility model discloses a centralized plasma arc cutting torch of energy through setting up supplementary gas pocket, can be with in certain region via spout spun gas restriction, makes the arc post energy more concentrated to, because the axis of supplementary gas pocket is parallel to each other with the axis of spout, gas can blow perpendicularly to workpiece surface, has shortened the stroke that blows to workpiece surface by the supplementary gas that supplementary gas pocket flows, has reduced the energy loss of arc post, and the energy is more concentrated, has promoted the cutting quality.

Description

Energy centralized plasma arc cutting torch

Technical Field

The utility model relates to a plasma welding cuts technical field, especially, relates to a centralized plasma arc cutting torch of energy.

Background

The cutting torch is used for gas welding, during operation, plasma arcs generated by the cutting torch are emitted to the surface of a workpiece, and particles inside the plasma arcs generate huge impact force on the surface of the workpiece, so that a large amount of energy is released, the workpiece material is locally melted and vaporized, and a notch is formed to realize a cutting function. However, since the nozzle for ejecting the plasma arc has a certain distance from the surface of the workpiece, a part of energy is lost in the process of ejecting the plasma arc to the surface of the workpiece, thereby reducing the cutting quality and being difficult to meet the requirement of high-quality cutting.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: to overcome the above-mentioned problems of the prior art, an energy concentrated plasma arc torch having a concentrated arc column energy is provided.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a centralized plasma arc cutting torch of energy, the centralized plasma arc cutting torch of energy includes that nozzle and cover establish the outside safety cover of nozzle, the spout has been seted up to the bottom of nozzle, the bottom of safety cover corresponds the venthole has been seted up to the spout, the spout with the venthole is linked together, the outer wall of nozzle with space between the inner wall of safety cover constitutes protection air chamber, supplementary gas pocket has been seted up on the lateral wall of nozzle, supplementary gas pocket reaches the venthole all with protection air chamber is linked together, the axis of supplementary gas pocket with the axis of spout is parallel to each other.

Further, the auxiliary air holes are provided in plurality, and the plurality of auxiliary air holes are uniformly distributed along the axial direction of the protective cover.

Further, the safety cover with the nozzle is coaxial to be set up, the spout is followed the axial setting of nozzle, the venthole is followed the axial setting of safety cover, the aperture of venthole is greater than the aperture of spout.

Furthermore, the energy centralized plasma arc cutting torch also comprises an electrode, the nozzle is sleeved outside the lower end of the electrode, an ion airflow chamber is formed in a space between the outer wall of the electrode and the inner wall of the nozzle, and the ion airflow chamber is communicated with the nozzle.

The energy centralized plasma arc cutting torch further comprises an electrode base and an insulating part, wherein the electrode is installed at the lower end of the electrode base, the electrode base is contained in the insulating part, the outer wall of the electrode base is attached to the outer wall of the insulating part, an air guide groove is formed in the outer wall of the bottom of the electrode base along the axial direction of the electrode base, and the air guide groove is communicated with the ion airflow chamber and the protection air chamber.

Furthermore, the energy centralized plasma arc cutting torch also comprises a distributor, wherein the distributor is sleeved outside the electrode, a distribution hole is formed in the distributor, and the distribution hole is communicated with the gas guide groove and the ion airflow chamber.

Furthermore, the energy centralized plasma arc cutting torch further comprises a sleeve assembly, the sleeve assembly comprises an inner sleeve, the upper end of the inner sleeve is sleeved outside the lower end of the insulating part, the lower end of the inner sleeve is sleeved outside the upper end of the nozzle, the distributor is located between the nozzle and the insulating part, a gas distribution chamber is formed by a space clamped among the inner sleeve, the insulating part, the distributor and the nozzle, and the gas distribution chamber is communicated with the gas guide groove, the distribution hole and the protection gas chamber.

Further, the sleeve assembly further comprises an insulating sleeve and an outer sleeve, the insulating sleeve is sleeved outside the inner sleeve, the outer sleeve is sleeved outside the lower end of the insulating sleeve, and the protective cover is in crimping connection with the outside of the outer sleeve.

Furthermore, the energy centralized plasma arc cutting torch also comprises a vent pipe, the lower end of the vent pipe extends into the cavity of the electrode, the space between the outer wall of the vent pipe and the inner wall of the electrode forms a first cooling air cavity, the space between the outer wall of the vent pipe and the inner wall of the electrode base forms a second cooling air cavity, the side wall of the electrode base is provided with an air vent communicated with the air guide groove, and the second cooling air cavity is communicated with the first cooling air cavity and the air vent.

Further, a protrusion is formed at the center of the inner bottom wall of the electrode and extends upwards along the axial direction of the electrode, and the top of the protrusion extends into the vent pipe.

The utility model has the advantages that: the energy centralized plasma arc cutting torch provided by the utility model can limit the gas sprayed out from the nozzle in a certain area by arranging the auxiliary air holes, thereby reducing the energy diffusion of the arc column and leading the energy of the arc column to be more concentrated; in addition, because the axis of the auxiliary air hole is parallel to the axis of the nozzle, the air can be blown to the surface of the workpiece vertically, the stroke of the auxiliary air flowing out of the auxiliary air hole to the surface of the workpiece is shortened, the energy loss of the arc column is reduced, the energy is more concentrated, and the cutting quality is improved.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic diagram of a plasma arc torch with a centralized power supply according to the present invention;

FIG. 2 is a schematic diagram of the construction of the torch body in the concentrated energy plasma arc torch of FIG. 1;

FIG. 3 is an enlarged partial view of the energy concentrated plasma arc torch at A of FIG. 1;

FIG. 4 is a schematic view of a dispenser in the torch body of FIG. 2;

FIG. 5 is a cross-sectional view of the dispenser of FIG. 4 taken along B-B;

FIG. 6 is a schematic view of the construction of a nozzle in the torch body of FIG. 2.

The names and the numbers of the parts in the figure are respectively as follows:

cutting torch body 10 shell 11 cutting torch base 12

The first support edge 121, the air outlet 122, and the air inlet 123

Arc 124 vent 1211 insulator 13

Overlap portion 131 gas outlet chamber 132 electrode base 14

Air supply pipe 143 of air guide groove 141, air vent 142 and air supply pipe

Snorkel 15 first cooling plenum 151 and second cooling plenum 152

Second abutting edge 162 of protrusion 161 of electrode 16

Third abutment edge 172 of dispenser 17 dispenses aperture 171

The nozzle 18 limiting groove 185 ion airflow chamber 181

Second flange 184 of ion flow slot 183 of nozzle 182

Filler 19 sleeve assembly 20 inner sleeve 21

First flange 213 Cooling plenum 211 seal 212

Insulating sleeve 22 outer sleeve 23 protective cover 30

The air outlet 301 protects the auxiliary air hole 303 of the air chamber 302

Fourth Flange 304 third Flange 401 of the retaining sleeve 40

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Please refer to fig. 1 and 2, the utility model provides a centralized plasma arc cutting torch of energy, this centralized plasma arc cutting torch of energy includes cutting torch body 10, the cover is established at the thimble assembly 20 of cutting torch body 10 outside and is installed at the safety cover 30 of cutting torch body 10 lower extreme, in operation, the plasma arc directive work piece (for example, stainless steel or aluminum product) surface that this centralized plasma arc cutting torch of energy produced, the inside particle of plasma arc produces huge impact force to the work piece surface, release a large amount of heats, the produced temperature of following electric arc high temperature makes the work piece material part of plasma arc effect usefulness melt, the vaporization, under the blowing force of high-speed motion ion, the metal and the metallic oxide that melt are blown off, thereby form the incision.

Referring to fig. 2, the cutting torch body 10 includes a housing 11, a cutting torch base 12, an insulator 13, an electrode base 14, a vent pipe 15, an electrode 16, a distributor 17, and a nozzle 18, wherein the cutting torch base 12 is mounted at a lower end of the housing 11, the insulator 13 is housed in the cutting torch base 12, the electrode base 14 is housed in the insulator 13, the vent pipe 15 is housed in the electrode base 14, the electrode 16 is mounted at a lower end of the electrode base 14 and is sleeved outside the vent pipe 15, and the distributor 17 and the nozzle 18 are both sleeved outside the electrode 16.

In one embodiment, the housing 11 is a generally hollow cylindrical structure with upper and lower ends extending therethrough, and the housing 11 is made of a stainless steel material to improve the overall strength and heat dissipation of the energy concentrated plasma arc torch.

The cutting torch base 12 is a hollow cylindrical structure with two through ends, the upper end of the cutting torch base 12 is inserted into the lower end of the shell 11, a first abutting edge 121 is formed on the outer wall of the cutting torch base 12 along the radial direction of the cutting torch base 12, and when the cutting torch base 12 and the shell 11 are installed in place, the first abutting edge 121 abuts against the lower end face of the shell 11, so that the cutting torch base 12 is limited. It is understood that the torch base 12 and the housing 11 can be connected by snapping, screwing, etc., and is not limited herein. In addition, two gas outlets 122 are formed in the side wall of the cutting torch base 12, wherein the two gas outlets 122 are oppositely arranged, one end of each gas outlet 122 penetrates through the outer wall of the cutting torch base 12 and then is communicated with the outside atmosphere, and the other end of each gas outlet 122 penetrates through the inner wall of the cutting torch base 12 and then is communicated with the inner cavity of the cutting torch base 12. Two air inlets 123 which are oppositely arranged are further formed in the side wall of the cutting torch base 12, the air inlets 123 are located below the air outlets 122, one ends of the air inlets 123 penetrate through the outer wall of the cutting torch base 12, and the other ends of the air inlets 123 penetrate through the inner wall of the cutting torch base 12 and then are communicated with the inner cavity of the cutting torch base 12.

The insulator 13 has a hollow cylindrical structure with upper and lower ends penetrating therethrough, and the insulator 13 penetrates through the upper and lower ends of the torch base 12 such that the upper end of the insulator 13 extends to the outside of the torch base 12 and the lower end of the insulator 13 extends to the outside of the torch base 12. The sidewall of the insulator 13 is formed with a bridging portion 131 extending outward along the radial direction of the insulator 13, and when the insulator 13 is mounted in place, the bridging portion 131 abuts against the lower end face of the cutting torch base 12, so that the mounting of the insulator 13 is limited. An air outlet chamber 132 is formed in a space between the outer wall of the insulating member 13 and the inner wall of the torch base 12, and the air outlet chamber 132 is communicated with both the air inlet 123 and the air outlet 122. In this embodiment, the insulator 13 is made of an insulating ceramic for preventing ionization of gas flowing between the torch base 12 and the electrode base 14.

The electrode base 14 is a hollow cylindrical structure with two through ends, the outer wall of the electrode base 14 is attached to the inner wall of the insulating member 13, a plurality of air guide grooves 141 are formed in the outer wall of the bottom of the electrode base 14 along the axial direction of the electrode base 14, the lower ends of the air guide grooves 141 penetrate through the lower end face of the electrode base 14, a plurality of air vents 142 communicated with the inner cavity of the electrode base 14 are formed in the side wall of the electrode base 14, and one air vent 142 is correspondingly communicated with one air guide groove 141.

The electrode 16 has a hollow cylindrical structure with an opening at the upper end, and the upper end of the electrode 16 is housed in the lower end of the electrode base 14 and is screwed to the electrode base 14. The air pipe 15 is a hollow tubular structure with two through ends, the upper end of the air pipe 15 is connected with the electrode base 14 by screw threads, and the lower end of the air pipe 15 extends into the cavity of the electrode 16. The inner cavity of the vent pipe 15 is communicated with the inner cavity of the electrode base 14, a first cooling air cavity 151 is formed by a space between the outer wall of the vent pipe 15 and the inner wall of the electrode 16, a second cooling air cavity 152 is formed by a space between the outer wall of the vent pipe 15 and the inner wall of the electrode base 14, and the second cooling air cavity 152 is communicated with the vent hole 142 and the first cooling air cavity 51. In the present embodiment, the material of the electrode 16 is red copper.

When in use, gas is introduced into the electrode 16 through the vent pipe 15, specifically, the gas enters the inner cavity of the vent pipe 15, and then sequentially enters the gas guide groove 141 through the first cooling gas cavity 151, the second cooling gas cavity 152 and the vent hole 142. In the gas flowing process, the gas flows through the bottom of the electrode 16 and then flows out of the electrode 16, so that the flowing path of the gas in the electrode 16 is prolonged, heat generated by the electrode 16 during working can be taken out as much as possible, a good cooling effect is achieved for the electrode 16, and the service life of the electrode 16 is prolonged.

In a specific embodiment, a protrusion 161 is formed at the center of the inner bottom wall of the electrode 16 and extends upward along the axial direction of the electrode 16, and the top of the protrusion 161 extends into the air duct 15, thereby increasing the contact area between the air flow and the electrode 16 and further improving the heat dissipation effect. In addition, the protrusion 161 is a conical structure, and the top of the protrusion 161 is a tip, so that when the airflow flows through the protrusion 161, the conical structure of the protrusion 161 can guide the airflow, thereby preventing the airflow from flowing smoothly.

In addition, a second abutting edge 162 is formed on the outer wall of the electrode 16 and extends outwards along the radial direction of the electrode 16, and when the electrode 16 and the electrode base 14 are installed in place, the second abutting edge 162 abuts against the lower end face of the electrode base 14, so that the installation of the electrode 16 is limited.

Referring to fig. 2, 4 and 5, the distributor 17 is substantially in a ring structure with two through ends, a third abutting edge 172 is formed on the inner wall of the distributor 17 and extends inward along the radial direction of the distributor 17, and the third abutting edge 172 is located below the second abutting edge 162 and abuts against the second abutting edge 162, so that the installation of the distributor 17 is limited. A plurality of dispensing holes 171 are formed in the side wall of the dispenser 17, the dispensing holes 171 are located below the third abutting edge 172 and penetrate through the inner and outer side walls of the dispenser 17, and the central axis of the dispensing holes 171 is offset from the central axis of the dispenser 17. During operation, the gas flow through the air guide groove 141 enters the inner cavity of the distributor 17 through the distribution hole 171, and due to the fact that the central axis of the distribution hole 171 is staggered with the central axis of the distributor 17, the gas flow entering the distributor 171 through the distribution hole 171 forms vortex gas flow, so that the gas is compressed, the plasma arc is thinner, the energy density and the ejection speed are higher, meanwhile, the plasma arc shoots the workpiece in a vortex mode, and therefore the flatness of the cut during cutting is guaranteed. In addition, the distributor 17 is made of an insulating material to electrically isolate the electrode 16 and the nozzle 18.

In a specific embodiment, the distribution holes 171 have four distribution holes and are uniformly distributed on the sidewall of the distributor 17, so that the air flow entering the inside of the distributor 17 through the four distribution holes 171 can generate a swirling action in the same rotation direction, thereby playing a role of enhancing the swirling of the air flow.

In addition, the distributor 17 is positioned below the electrode base 14, so that the distance between vortex airflow workpieces is shortened, the torsion is increased, and the arc column energy is further improved. Meanwhile, the distributor 17 is an insulator, so that gas between the electrode 16 and the sleeve assembly 20 is prevented from being ionized, and the sleeve assembly 20 is protected.

Referring to fig. 3 and 6, the nozzle 18 is substantially a hollow cylindrical structure with an opening at the upper end, the upper half part of the nozzle 18 is a straight cylinder, the lower half part of the nozzle 18 is a cone, the inner cavity of the nozzle 18 is a cone-shaped cavity, the large opening end of the cone-shaped cavity faces upward, the nozzle 18 is sleeved outside the lower end of the electrode 16, a limiting groove 185 is formed on the upper end surface of the nozzle 18 by recessing downward along the axial direction of the nozzle 18, the limiting groove 185 penetrates through the inner wall of the nozzle 18, when the nozzle 18 is sleeved outside the electrode 16, the lower end surface of the distributor 17 abuts against the bottom wall of the limiting groove 185, the outer wall of the distributor 17 abuts against the side wall of the limiting groove 185, and thus the distributor 17 is clamped between the electrode 16 and the nozzle 18, the axial and radial movements of the distributor 17 relative to the electrode 16 are limited, and the. In addition, the distributor 17 is located axially between the insulator 13 and the nozzle 18 in the plasma arc torch of the present invention.

From the above, the lower end of the electrode 16 is accommodated in the inner cavity of the nozzle 18, referring to fig. 3 again, an ion airflow chamber 181 is formed in a space between the outer wall of the electrode 16 and the inner wall of the nozzle 18, the plasma airflow chamber 181 is communicated with the distribution hole 171, a nozzle 182 is formed in the lower end surface of the nozzle 18 along the axial direction of the nozzle 18, the nozzle 182 is a circular hole, the nozzle 182 penetrates through the lower end surface of the nozzle 18, an ion airflow groove 183 is formed in the center of the bottom wall of the ion airflow chamber 181 and extends downward along the axial direction of the nozzle 18, the ion airflow groove 183 is in a horn-shaped structure, the large-mouth end of the horn-shaped structure faces upward, the upper port of the ion airflow groove 183 is communicated with the ion airflow chamber 181, and the lower port of the ion airflow. In the present embodiment, the material of the nozzle 18 is red copper.

When the plasma jet nozzle works, gas enters the plasma gas flow chamber 181 through the distribution holes 171, the inner cavity of the nozzle 18 is a conical cavity, so that gas flow is compressed in the plasma gas flow chamber 181, and when the gas flow enters the ion gas flow groove 183, the gas is compressed for the second time because the ion gas flow groove 183 is in a horn-shaped structure, so that the ejection speed and energy of plasma gas are improved.

The orifice 182 has a hole diameter D of 1.6mm or less and D of 2.0mm or less, the orifice of the large-opening end of the ion gas flow groove 183 has a hole diameter D of 3.2mm or less and D of 3.8mm or less, the taper angle of the ion gas flow groove 183 is α, 90 ° or more and α ° or less and 120 ° or less, and in one specific embodiment, D is 1.8mm, D is 3.5mm, and α is 110 °.

In addition, referring to fig. 1 and 2 again, the torch body 10 further includes an arc ignition wire 124 and a gas supply pipe 143, the arc ignition wire 124 is made of a conductive material, one end of the arc ignition wire 124 is located in the housing 11 and connected to the upper end of the torch base 12, and the other end of the arc ignition wire 124 extends out of the housing 11, when in use, one end of the arc ignition wire 124 extending out of the housing 11 is connected to the positive electrode of the power supply, so that the nozzle 18 is electrically conducted with the positive electrode of the power supply through the sleeve assembly 20, and the electrode 16 is connected to the negative electrode of the power supply through a conducting wire (not shown), so that the electrode 16 is electrically conducted with the negative electrode of the power supply, and thus, the gas entering into the ion gas flow chamber 181 can be ionized rapidly, and the arc between the electrode 16 and the workpiece can be. The gas supply pipe 143 is used for introducing working gas, the gas supply pipe 143 is communicated with the electrode base 14, specifically, the gas supply pipe 143 is substantially in a tubular structure with two through ends, one end of the gas supply pipe 143 is located in the housing 11 and connected with the upper end of the electrode base 14, and the other end of the gas supply pipe 143 extends to the outside of the housing 11 and is connected with a gas source.

In one embodiment, the torch body 10 is further filled with a filler 19 in the housing 11, and the filler 19 can fix the gas supply pipe 143, the torch base 12, the insulator 13, and the electrode base 14 in the housing 11 and can also serve as a seal. In the present embodiment, the filler 19 is formed by curing the glue.

Referring to fig. 1 and 3, the sleeve assembly 20 includes an inner sleeve 21, an insulating sleeve 22 disposed outside the inner sleeve 21, and an outer sleeve 23 disposed outside a lower end of the insulating sleeve 22.

Specifically, the inner tube 21 has a hollow cylindrical structure with two ends penetrating through, an upper end of the inner tube 21 is fitted over the lower end of the insulator 13, and a lower end of the inner tube 21 is fitted over the upper end of the nozzle 18. In the present embodiment, the inner sleeve 21 is screwed to the torch base 12, and the sleeve assembly 20 and the torch body 10 are connected to each other. A first flange 213 is formed on the inner wall of the lower end of the inner sleeve 21 and extends inwards along the radial direction of the inner sleeve 21, a second flange 184 is formed on the outer wall of the upper end of the nozzle 18 and extends outwards along the radial direction of the nozzle 18, and the upper end surface of the first flange 213 is abutted against the lower end surface of the second flange 184, so that the nozzle 18 is fixed. The inner sleeve 21 is made of a conductive material so that the nozzle 18 is electrically connected to the positive electrode of the power supply through the inner sleeve 21, the torch base 12, and the ignition wire 124 in this order. In the present embodiment, the inner sleeve 21 and the outer sleeve 23 are both copper sleeves, and the insulating sleeve 22 is made of an insulating material.

The space between the inner wall of the inner tube 21 and the outer wall of the insulator 13 constitutes a cooling air chamber 211, and the cooling air chamber 211 communicates with the intake port 123. In addition, since the distributor 17 is located between the insulator 13 and the nozzle 18 in the axial direction of the plasma arc torch of the present invention, the distributor 17 is accommodated in the inner sleeve 21, and at this time, a space sandwiched between the inner wall of the inner sleeve 21, the lower end surface of the insulator 13, the outer wall of the distributor 17, and the upper end surface of the nozzle 18 constitutes a gas distribution chamber 210, and the gas distribution chamber 210 is communicated with the gas guide groove 141, the cooling gas chamber 211, and the distribution hole 171.

When the gas flows through the gas guide groove 141 and enters the gas distribution chamber 210, part of the gas in the gas distribution chamber 210 flows into the cooling gas chamber 211, and then the gas enters the external atmosphere through the gas inlet 123, the gas outlet chamber 132 and the gas outlet 122 in sequence, so that the heat transferred to the inner sleeve 21, the insulating part 13 and the cutting torch base 12 is taken out, the cooling function is realized, and the influence of high temperature on the parts on normal work is avoided. In addition, in order to improve airtightness and prevent gas leakage, a seal 212 is interposed between the inner wall of the inner sleeve 21 and the outer wall of the torch base 12, and it is understood that the seal 212 is made of a rubber or silicone material.

The protective cover 30 and the nozzle 18 are coaxially arranged, the protective cover 30 is of a hollow cone structure with an opening at the upper end, the protective cover 30 is sleeved outside the nozzle 18, and the protective cover 30 is pressed outside the outer sleeve 23, so that the protective cover 30 is fixed. The bottom of safety cover 30 has seted up venthole 301 along the axial of safety cover 30, and venthole 301 communicates each other and coaxial setting with spout 182, and the aperture of venthole 301 is greater than the aperture of spout 182 to make the gas that flows out via venthole 301 can surround in the periphery of arc post, in order to prevent the diffusion of arc post ability. The space between the inner wall of the shield case 30 and the outer wall of the nozzle 18 constitutes a shield air chamber 302, and the shield air chamber 302 communicates with the air outlet hole 301. In addition, the first flange 213 has a vent 1211, and the vent 1211 is connected to both the gas distribution chamber 210 and the protection gas chamber 302, such that the gas distribution chamber 210 is connected to the protection gas chamber 302 through the vent 1211.

When the gas flows through the gas guiding groove 141 and enters the gas distribution chamber 210, part of the gas in the gas distribution chamber 210 flows into the shielding gas chamber 302 and enters the gas outlet hole 301 to flow out, and the gas flowing out through the gas outlet hole 301 can prevent waste slag from splashing when the workpiece is cut and can enhance the cutting capability.

In addition, the side wall of the protective cover 30 is provided with a plurality of auxiliary air holes 303 communicated with the protective air chamber 302, the axes of the auxiliary air holes 303 are parallel to the axis of the nozzle 182, so that the gas entering the protective air chamber 302 can be sprayed on the surface of the workpiece along the direction parallel to the axis of the nozzle 182, on one hand, the gas sprayed out from the nozzle 182 can be limited in a certain area, the energy diffusion of the arc column is reduced, the energy of the arc column is more concentrated, the arc column has larger energy when reaching the cutting surface of the workpiece, the verticality of the arc column is improved, and the smoothness of the cutting surface is improved; on the other hand, because the axis of the auxiliary air hole 303 is parallel to the axis of the nozzle 182, the air can be blown to the surface of the workpiece vertically, the stroke of the auxiliary air flowing out of the auxiliary air hole 303 to the surface of the workpiece is shortened, the energy loss of the air is further reduced, the energy is more concentrated, foreign matters such as impurities and dust on the surface of the workpiece can be effectively and rapidly removed in the process of cutting the workpiece, and the cutting quality is improved. In addition, the gas can play an effective heat dissipation role for the protection cover 30 through the auxiliary gas hole 303, and the protection cover 30 is prevented from being damaged due to overhigh temperature in work. In the present embodiment, the plurality of auxiliary gas holes 303 are uniformly distributed along the circumferential direction of the protection cover 30 so that the auxiliary gas uniformly acts on the surface of the workpiece.

In order to avoid the protective cover 30 to break away from the outer sleeve 23 easily, the utility model discloses a centralized plasma arc cutting torch of energy still includes fixed cover 40, and fixed cover 40 roughly is the cavity tubular structure that both ends link up, and fixed cover 40 cover is established in the outside of outer sleeve 23 and with outer sleeve 23 threaded connection. A third flange 401 is formed on the inner wall of the lower end of the fixing sleeve 40 to extend inward in the radial direction of the fixing sleeve 40, a fourth flange 304 is formed on the outer wall of the upper end of the protection cover 30 to extend outward in the radial direction of the protection cover 30, and the upper surface of the third flange 401 abuts against the lower surface of the fourth flange 304, so that the protection cover 30 is fixed by compression.

The utility model discloses a centralized plasma arc cutting torch during operation of energy, the centralized plasma arc cutting torch of energy is in the top of work piece, and electrode 16 is connected with the negative pole of power, nozzle 18 and work piece are connected with the positive pole of power, through the air supply pipe 143 air feed, gas gets into in the gas distribution room 210 behind the inner chamber of electrode base 14, breather pipe 15, first cooling air cavity 151, second cooling air cavity 152, blow vent 142 and air guide groove 141 in proper order, at this moment, gas divide into three routes flow direction, wherein get into in the outside atmosphere via cooling air chamber 211, air inlet 123, go out air chamber 132 and gas outlet 122 in proper order all the way; the other path enters the plasma airflow chamber 181 through the distribution hole 171 and is ionized into an ion airflow, at this time, an electric arc between the electrode 16 and the workpiece is ignited, a plasma arc is formed, the workpiece is cut under the action of the plasma arc, and once the electric arc is established, the arc ignition wire 124 is cut off; the last path enters the protection air chamber 302 through the vent 1211 and finally flows out of the air outlet 301 and the auxiliary air hole 303.

The utility model provides a centralized plasma arc cutting torch of energy through setting up supplementary gas pocket 303, can restrict the gas via spout 182 blowout in certain area, has reduced arc column energy diffusion, makes the arc column energy more concentrated, has guaranteed to have great energy when the arc column reaches the work piece cutting surface, has promoted the straightness that hangs down of arc column, has improved the smoothness of cutting plane; in addition, because the axis of the auxiliary air hole 303 is parallel to the axis of the nozzle 182, the air can be blown to the surface of the workpiece vertically, the stroke of the auxiliary air flowing out of the auxiliary air hole 303 to the surface of the workpiece is shortened, the energy loss of the arc column is reduced, the energy is more concentrated, and the cutting quality is improved.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. An energy centralized plasma arc torch, comprising: the centralized plasma arc cutting torch of energy includes that nozzle and cover establish the outside safety cover of nozzle, the spout has been seted up to the bottom of nozzle, the bottom of safety cover corresponds the venthole has been seted up to the spout, the spout with the venthole is linked together, the outer wall of nozzle with space between the inner wall of safety cover constitutes protection air chamber, supplementary gas pocket has been seted up on the lateral wall of nozzle, supplementary gas pocket reaches the venthole all with protection air chamber is linked together, the axis of supplementary gas pocket with the axis of spout is parallel to each other.

2. The energy concentrated plasma arc torch of claim 1 wherein: the auxiliary air holes are multiple and are uniformly distributed along the axial direction of the protective cover.

3. The energy concentrated plasma arc torch of claim 1 wherein: the safety cover with the coaxial setting of nozzle, the spout is followed the axial setting of nozzle, the venthole is followed the axial setting of safety cover, the aperture of venthole is greater than the aperture of spout.

4. The energy concentrated plasma arc torch according to any of claims 1-3 wherein: the energy centralized plasma arc cutting torch also comprises an electrode, the nozzle is sleeved outside the lower end of the electrode, an ion airflow chamber is formed in a space between the outer wall of the electrode and the inner wall of the nozzle, and the ion airflow chamber is communicated with the nozzle.

5. The energy concentrated plasma arc torch of claim 4 wherein: the energy centralized plasma arc cutting torch further comprises an electrode base and an insulating part, the electrode is installed at the lower end of the electrode base, the electrode base is contained in the insulating part, the outer wall of the electrode base is attached to the outer wall of the insulating part, an air guide groove is formed in the outer wall of the bottom of the electrode base along the axial direction of the electrode base, and the air guide groove is communicated with the ion airflow chamber and the protection air chamber.

6. The energy concentrated plasma arc torch of claim 5 wherein: the energy centralized plasma arc cutting torch also comprises a distributor, wherein the distributor is sleeved outside the electrode, a distribution hole is formed in the distributor, and the distribution hole is communicated with the gas guide groove and the ion airflow chamber.

7. The energy concentrated plasma arc torch of claim 6 wherein: the energy centralized plasma arc cutting torch further comprises a sleeve assembly, the sleeve assembly comprises an inner sleeve, the upper end of the inner sleeve is sleeved outside the lower end of the insulating part, the lower end of the inner sleeve is sleeved outside the upper end of the nozzle, the distributor is located between the nozzle and the insulating part, a gas distribution chamber is formed by a space clamped among the inner sleeve, the insulating part, the distributor and the nozzle, and the gas distribution chamber is communicated with the gas guide groove, the distribution hole and the protection gas chamber.

8. The energy concentrated plasma arc torch of claim 7 wherein: the sleeve assembly further comprises an insulating sleeve and an outer sleeve, the insulating sleeve is sleeved outside the inner sleeve, the outer sleeve is sleeved outside the lower end of the insulating sleeve, and the protective cover is in crimping connection with the outer sleeve.

9. The energy concentrated plasma arc torch of claim 5 wherein: the energy centralized plasma arc cutting torch further comprises a vent pipe, the lower end of the vent pipe extends into the cavity of the electrode, the space between the outer wall of the vent pipe and the inner wall of the electrode forms a first cooling air cavity, the space between the outer wall of the vent pipe and the inner wall of the electrode base forms a second cooling air cavity, an air vent communicated with the air guide groove is formed in the side wall of the electrode base, and the second cooling air cavity is communicated with the first cooling air cavity and the air vent.

10. The energy concentrated plasma arc torch of claim 9 wherein: the center of the inner bottom wall of the electrode extends upwards along the axial direction of the electrode to form a bulge, and the top of the bulge extends into the vent pipe.

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